CA1317004C - Ground plane shield device for right angle connectors - Google Patents
Ground plane shield device for right angle connectorsInfo
- Publication number
- CA1317004C CA1317004C CA000614400A CA614400A CA1317004C CA 1317004 C CA1317004 C CA 1317004C CA 000614400 A CA000614400 A CA 000614400A CA 614400 A CA614400 A CA 614400A CA 1317004 C CA1317004 C CA 1317004C
- Authority
- CA
- Canada
- Prior art keywords
- panels
- teeth
- ground plane
- shield device
- predetermined
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000000758 substrate Substances 0.000 claims description 54
- 239000004020 conductor Substances 0.000 description 16
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 241000370685 Arge Species 0.000 description 1
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 241000905957 Channa melasoma Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- NMFHJNAPXOMSRX-PUPDPRJKSA-N [(1r)-3-(3,4-dimethoxyphenyl)-1-[3-(2-morpholin-4-ylethoxy)phenyl]propyl] (2s)-1-[(2s)-2-(3,4,5-trimethoxyphenyl)butanoyl]piperidine-2-carboxylate Chemical compound C([C@@H](OC(=O)[C@@H]1CCCCN1C(=O)[C@@H](CC)C=1C=C(OC)C(OC)=C(OC)C=1)C=1C=C(OCCN2CCOCC2)C=CC=1)CC1=CC=C(OC)C(OC)=C1 NMFHJNAPXOMSRX-PUPDPRJKSA-N 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000009420 retrofitting Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
- H01R12/70—Coupling devices
- H01R12/71—Coupling devices for rigid printing circuits or like structures
- H01R12/72—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures
- H01R12/722—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures coupling devices mounted on the edge of the printed circuits
- H01R12/724—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures coupling devices mounted on the edge of the printed circuits containing contact members forming a right angle
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding
- H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
- H01R13/6581—Shield structure
- H01R13/6585—Shielding material individually surrounding or interposed between mutually spaced contacts
Abstract
TITLE
Ground Plane Shield Device For Right Angle Connectors ABSTRACT OF THE INVENTION
A ground plane shield device for retro-fit application to a connector having columns of tails with a right angle bend that is previously mounted to a board includes a generally U-shaped conducting member having a closed face and three open faces. Two of the faces have clips which are arranged in corresponding pairs and which respectively grasp said electrically interconnect the member to a first and a second portion of a tail in one of the columns that is connected to ground potential.
ETM:EL-4306
Ground Plane Shield Device For Right Angle Connectors ABSTRACT OF THE INVENTION
A ground plane shield device for retro-fit application to a connector having columns of tails with a right angle bend that is previously mounted to a board includes a generally U-shaped conducting member having a closed face and three open faces. Two of the faces have clips which are arranged in corresponding pairs and which respectively grasp said electrically interconnect the member to a first and a second portion of a tail in one of the columns that is connected to ground potential.
ETM:EL-4306
Description
-` 13~700~
TITLE
Ground Plane Shield Device For Right Angle Connectors BACKGROUND OF THE INVEN7rION
Field oî the Invention The present invention relates to a ground plane shield device ~r impedance and cross talk control between signal calTying conductors emanating from an electrical connector, and in particular, to such a shield device adaptedfor retro-fitting to a connector that has been previously mounted to a board.
Description of the Pnor_Art Controlling the interfering electrical effect than an electrical signal carried on a given conductor exerts on a signal carried on an adjacent conductor is especially important in high density connectors. Such control can be implemented in a variety of ways. For example, the most basic technique in a high density connector is to connector particular ones of the conductors to a predetermined ground potential, thereby causing such conductors to act similarlyto ground planes and thereky to isolate the signals carried on adjacent conductors.
An alternative approach is to provide separate ground plane structures in the connector. Exemplary of this alternative are the devices disclosed in United States Patent 4,232,929 (Zobawa) and United States Patent 4,558,917 (Kamono et al). In the latter patent the ground plane structures take the form of separate, spaced vertical plates disposed between adjacent columns of conductor tails emanating from a connector housing. United States Patent 3,601,756 ~Stroh~ discloses a connector in which a ground plane structure is sinuously wrapped about the signal carrying conductors. Copending Canadian application Senal Number 543,648 filed on August 04 1987 and copendîng Canadian application Serial Number 551,742 filed on N~vember 12 1987, both assigned to ~e assignes of ~e present ~, ..
invention, rclatc to shielding schemes for use in cables and in cable conrlectors.
It is more difflc-llt to control the impedance and crosstalk efrects in connectors that have not been previously dcsigned to contain suitable interference control structures once such a connector has bcen mounted in position on a circuit board substrate.
Accordingly, it is believed to be advantageous to provide a ground plane shield arrangement that is particularly adapted for 10 being expeditiously placed into use with a connector once the same has already been placed in position on a substrate.
SUMMARY OF THE INVENTION
The present invention relates to a ground plane shield 1~ device for use with a connector mounted to a generally planar substrate, the connector being of the type ha~ring a housing from which a plurality of terminal tails emanate. The tails are arranged in at least one, but typically a plurality of generally parallel columns.
Each of the tails has a flrst portion generally perpendicular to the 2(! housing, a second portion generally perpendicular to the substrate, and an intermediate portion connecting the flrst and the second portions .
The ground plane shield device comprises a conducting member formed to define a first and a second panel arr~nged in 2~ genera~ly confrontational spaced relationship with respect to each other, the panels defining a space therebetween. Each panel has at least a ~irst, connector, ed~e and a second, substrate, edge. A ~Irst and a second clip are disposed on each panel in corresponding locations along the connector and the substrate edges, respectively.
30 The clip along the connector edge of each of the panels and the clip along the substrate edge of each of the panels extend toward the corresponding clip on the other of the panels thereby to place the corresponding clips into predetermined close proximlty to each other. Each of the clips has a cutout therein, each cutout 1 3 1 7 0 0 At l~cillg si~ed to rcceive and to grasp a predetermincd portion of a prcdetermillcd one of thc tails in the column of tails, such that, in use, with the cutouts in the clips along the conncctor edges of the panels grasping the first portion of the prcdetermined one of the 5 tails in the col--mn and with the cutouts in the clips along the substrate edges of the panels grasping the substrate portlon of the same predetermined tail the intermediate portion of all of the tails in the column is received in the space between the panels.
In the preferred instance the member is formed to 10 define the panels by folding along a first fold line and along a second fo]d line generally parallel to the ~lrst whereby the ground plane shield device is a generally U-shaped member having a closed face defined between the fold lines and three open faces defined between corresponding edges of the panels.
BR~EF DESCRlPTlON OF THE DRAWINGS
The invention will be more fully understood from the following detailed description thereof, taken in connection with the accompanying drawings, which form a part of this application and '~ O in which:
Figure 1 is a rear perspective view of a prior art connector having an array of right angle conductor tails emanating therefrom;
Figure 2 is a highly stylized rear perspective view of a 25 ground plane shield device in accordance with the present invention with portions thereof removed for clarity of illustration, the shield device being disposed w~th respect to a substrate ~ith the closed end of the device parallel to the surface of the substrate:
Figure 3 is a front perspective view of a board mounted 30 connector such as shown in Figure 1 with the ground plane shield device in accordance with the present invention being disposed w~th respect thereto in an alternate position from that sh~wn in Figure 2, with one of the ground plane shield devices being exploded from its position, with securing means for securing the 131700~
sllield dcvice to the board being illustrated as in sccuring position (so]id lines~ and in retracted position (dotted lines);
Figure 4 is an en]arged view of the exploded portion of Figure 3 again with a portion of the securing means ~or securing the shield device to the board being illustrated as in securlng position (solid lines) and in retracted position (dotted lines); and Figure 5 is a plan view of a b1ank rrom which the grourld plane shield device in accordance with the present invention is form ed .
DF,TAII,ED DESCRlPrlON OF THE lNVENTION
l`hroughout the ~ollowing detai~ed descriptlon, similar reference numerals will refer to similar elements in all figures of the drawings.
Figure 1 illustrates a rear perspective view of a typical connector of the prior art generally indicated by reference character 10. Exemplary of connectors similar to the connector 10 shown in Figure 1 are the devices manufactured and sold ~r E. 1. Du Pont de Nemours and Company, Incorporated as the DIN 41612-'~0 series C connector and the DIN 41612-Series R connector. The connector 10 is suitably mounted to a substrate 12, such as a printed circuit or pnnted wire board in a manner to be discussed, although in Figure 1 it is spaced a predetermined distance thereabove for clarity of illustratlon.
2~ The connector 10 has a generally rectanguloid housing 16 formed of an insulating material. To effect the mounting of t~e connector 10 to the board 12 t e housing 16 is provided, in a typical instance, with a mounting abutment 18 at each end thereof.
Only one of the abutments 18 is shown in Figure 1. The abutment 18 has a planar shelf 20 thereon and a mounting opening 22 therethrough through which a mounting screw or the like may pass to secure the connector 10 to the board 12. The housing 16 extends a predetermined height dimension H above the surface of the board 12 when the connector 10 is mounted thereto.
1 31 70~-~
Disposed within the housing 16 is a plurality of electrical contacts of eithcr the male of female type. Each of the contacts has a ~ail generally indicated by the rercrence character 26 associ~ted therewith. In Figure 1 the tails 26 emanate from the 5 rear surface 30 of the housing 16 in an array containing a predetermiIled plurality N of vertical columns 34-1 though 34-N
(Figure 4). Only four such adjacent columns 34-1 through 34-4 are ShOWIl in Figure 1. Each column 34 contains a vertically aligned stack of conductor tails 26. Although any predetermined number of 10 tails 26 may be arranged in each stack, in Figure 1 each column 34 is shown to contain three such tails 26, with the top tail in a given column is indicated by the suffix "r', the middle tail being indicated by the suffix "M", and the bottom tail being indicated by the suffix"B".
It is a typical practice in the art that one of the eontacts associated with one of the tails 26 in each of the colurnns 34 be connected to a predetermined ground potential. As used herein, it should be emphasized that ground potential is referenced from the point of view of a signal carrying conductor. Thus, the terrn is construed herein to include power connections, chassis grounds, and logic grounds. The tail 26 itself therefore also lies at this predeterrnined ground potential. For purposes of discussion herein it is assumed that the middle tail 26M in each of the columns 34 is connected to this predetermined ground potential. ~,ach of the columns 34 has a predetermined transverse dimension 36 associated thcrewith, where the dimension 3Ei includes the transverse dimension of the tail 26 itself as well as ~ome predetermined buffer distance adjacent each side of each of the tails.
Each of the tails 26 compfises a first portion 38, a second portion 40 and a third portion 42. The ~irst portion 38 is termed the connector portion since it is in proximit~ to the rear surface 30 of the housing 16 and lies generally perpendicular thereto. The third portion 42 is termed the substrate portion since ~ 31 700 ~
it is proximal to and gcnerally perpendicularly arrangcd with respect to the substrate 12. When the connector 10 is aff~xed to the substrate 12 the third portion 40 of each of the tails 26 extends through an opening 14 prov~ded in the substrate 12. The second portion 40 is intermediate the flrst portion 38 and third portion 42 and, in the prior art connector illustrated, contains a generally right angle bend therein. Of course, it should be understood that the portions 38 and 42 need not, as is illustrated, be completely perpendicular to the connector and the board, nor, ~s illustrated, must the intermediate portion 40 be a right angle bend, inasmuch as the present invention may be configured ~or use with alternate configurations of these elements.
Figure 2 is a highly styli~ed rear perspective illustration of a ground plane shield device generally indicated by the reference character 50 in accordance with the present invention, with portions thereof removed for clarity. The device 50 is adapted to be retro-~it to a connector 10 already positioned on and secured to a substrate 12. The device 50, in the preferred case, comprises a member made of a conducting material, such as phosphor bronze or berylliurn copper. Preferably the dev~ce 50 is formed, as will be discussed, by ~olding the same along a first fold line 52 and a second fo]d line 54 to dehne a generally U-shaped structure having a web portion 56, a first panel 5~ and a second panel 60.
Each panel 58, 60 is generally square in shape and preferably has a dimension 61 that is selected such that when the device 5~ is in posStion about the tai~s (and there supported in a manner to be described~ the top sur~ace of the web 56 is spaced above the substrate 12 a distance substantially equal to the height dimension H of the housing 12. The panels 58, 60 each have an interior surface 581, 60~ and an exterior surface 58E, 60E thereon.
The exterior sur~ces 58E, 60E of the panels are spaced by a predetermined distance 62, while the interior surfaces are spaced a predetermined distanee 63. The distances 61, 62 and 63 can have any desired relationship with respect to each other, ~t being 13170~
only necessary that the distance 63 be substantially equal to the distance 36, for reasons that should bccome apparent herein.
It should be understood that the panels 58, 60 may be formcd by bendil-g or folding a planar member along a slngle, double (as i?~ustrated) or other predetermined number of multiple folds or by rolling the same and, in all events, remain within the contemplation of the present invention. Thus, for example, it should be understood that the device 50 may be formed with only one fold line, in which event the devicc has imparted thereto a generally V-shape. Alternately, more than two fold lines may be used to define the panels, in which event there is imparting a generally corrugated configuration to the web portion 56 of the device 50. Yet further, the member may be formed by rolling in which case the upper portion thereof will exhibit a generally domed 1 5 shape.
Each panel 58, 60 has a flrst, connector, edge 64, a second, substrate, edge 66, and a third, free, edge 68 thereon. The fourth edge of each panel 58, 60 is defined by the respective fold line 52, 54. l`he panels 58 and 60 lie generally parallel to each other in confrontational spaced-apart relationship. The panels 58, 60 and the web 56 cooperate to define an interior space 70. The device 50 has a first open face 72 deflned between the opposed connector edges 64 of the panels 58, 60, a second open face 74 defined between the opposed substrate 66 edges of the panels 58, 60, and a third open face 76 defined between the free edges 68 of the panels 58, 60. The fourth ~ace of the device 50 is closed by the web 56 defined between the fold lines 52, 54. In the embodiment shown in Figure 2 the web 56 is, in use, disposed generally parallel to and spaced in overlying relationship with respect to the substrate 12. However, the device 50 may be used with ~he web 56 disposed perpendicular to the surface of the substrate 12. Thus. as seen in the embodiment shown in Figures 3 and 4, the edges defining the connector edges 64 and the substrate edges 66 differ ~rom those shown in Figure 2. In Figures 3 and 4, the connector 1 3 ~ 7 o O !9r edges 64 are dcrlncd by the edges of the panels opposite from the fold lines 52, 54 dei~lning the web 56 while the substrate edges 66 are derlned by the edges adjacent to the web 56.
Each panel 58, 60 has a first clip 82 and a second clip 5 84 disposed in corresponding locations along the edges of the panels defining two of the three open faces. Tn the embodiment illustrated in Figure 2 the device 50 is shown to have clips 82, 84 on the faces 72, 74 respectively defined by corresponding connector edges 64 and corresponding substrate edges 66. That is, 10 in the embodiment of Figure 2 the c]ips 82 are provided on the face 72 defined on th~ connector edges 64 Iying adjacent to the web 66 and the clips 84 are defined on the substrate edges 76 that lie opposite from the web 56. In the embodiment illustrated in Figures 3 and 4 the device 50 is shown to have the clips 82 on the 15 face 74 defined by corresponding connector edges 66 and the clips 84 on the face 76 defined by corresponding substrate edges 68. It should be understood that consistent with the foregoing discussion the device 50 may be configured to have only two open faces (i~e., a connector face 72 and a substrate face 74) or more than three open 20 faces. if desired. Any of these alternative configurations is to be construed as Iyir~g within the contemplation of the invention.
Each clip 82 is formed on the respective panel on which it is disposed by folding the matelial Or the panel along a fold line 86 toward the confrontationally disposed other of the panels.
25 The clips 84 are formed on their respective panel in a similar manner by folding the material of the panel along a fold line 88 toward the confrontationally disposed other of the panels. Each of the fold lines 86, 88 lies generally parallel to the edge of the panel on which the clip is associated. The clips 82. 84 are spaced a 30 respective predetermined distance 90, 92 along the edge of the panel from which it is defined for a purpose to be made clearer herein .
-~ ~ 1 7 oo i'l~
Whcn formed thc conrronting pairs of clips 82, 84 lie are spaced apart a predetermined close distances 94, 95. The magnitudes Or the distances 94, 95 are related to the thickness dimension of sclectcd predetermined portions of the talls 26. It 5 shou]d be understood that the clips 82, 84 may take a variety of forms, so long as they are arranged so as to support the shield above the substrate and from the connector and so as to engage the predetermined portion of a selected one of the tails and thereby electlically connect each panel of the shield to the tail at both 10 points where the clips 82, 84 engage the same.
Each clip 82 has a cut-out 96 fonned therein, ~he cut-outs 96 being bounded on each side thereof by a lead-in surface 98.
Similarly, each of the clips 84 has a cut-out 99 formed therein. The cut-outs 99 are bounded on each side thereof by a lead-in surface 100. The panels 58, 60 are preferably slotted~ as at 102, 104, respectively, in the vicinity of the respective clips ~2, 84 to impart flexibility thereto. Each of the panels 58, 60 is also provided with a depression or dimple 108, for a purpose to be described.
In use, the shield device 50 is supported by the clips 20 82, 84 a predeterrnined distance 110 above the substrate 12 and a predetermined distance 114 from the surface 30 of the connector 10 to straddle a predetermined one of the columrls 34 of the tails 26 emanating from the surface 30 thereof. The desired final mounted position for the shield 50 is to dispose the cut-outs 96 on '~5 the clips 82 provided on the connector edges of the shield 50 in engagement against the connector portion 38 of the tail 26M (i.e., the tail connected to ground potential) and to dispose the cut-outs 98 on the clips ~34 provided on the substrate edges of the device 50 in engagement against the substrate portion 40 of the tail 26M.
30 When so engaged, the remainder of the tail 26M as well as the entirety of the remaining tails 26T and 26B in the selected column 34 lie within the space 70 encompassed by the confronting panels 58, 60 and the web 56 of the device 50. As the device 50 straddles the selected co]umn the dimples 108 on the panels 58, 60 abut 1~70~
agai-lst the intermediate porUon 42 of the tail 26M, thereby providing mourlting stability to the device 50, The distanccs 90, 92 are, thcrefore, selccted to position the clips 84, 86 so that they are respec~ively adjacent to the portion of the tail against which they 5 grasp and, simultaneously when so grasping the appropriate portion of the tai], to support the device 50 the distances 110, 114 from the subslrate 12 and the face 3t) of the connector 10. As noted earlier thc top surface of the web 56 should preferably be spaced aibove the substrate 12 a distance substantially equal to the height 1 0 dimension H of the housing 12.
The panels 58, 60 are introduced over the selected column 34 in a manner that brings one set of clips and then the other set of clips over the tails in the column. As the clips 82 and 84 are moved over the tails 26, they are urged apart owing to the 15 reaction of the lead-in 98, 100, as the case may be, against the tails 26. The resiliency imparted to the clips 82, 84 by the slots 102, 104, respectively, in ~he panels ~8, 60 assists in this action. Note that if the motion of the device 50 is sufficiently fast the clips 82, 84 move past any preceding tail 26 before the clip can resiliently 20 return into gripping position, thus to prevent a clip from clasping onto other than the tail of interest.
The gripping engagement of the clips 82, 84 and the tail 26M serves to properly terminate the panels 58, 60 and electrically interconnect the device 50 to the same potential at 25 which the tail 26M is maintained. For this purpose the dev~ce 50 is ~herefore, preferably fabncated of a conductive material. However, it should be understood that the member may be other than a conductor, if the interior surface of the panels thereof and the clips are lined with a conductive material to establish the electrical 30 connections to be discussed. The panels are sized to provide a sumciently ]arge surface so that ground return currents associated with the signal carrying conductors disposed within the space 70 and surrounded by the device 50 can ~low in the panels as needed to minimize the inductance associated with ~e ground path.
1~
1 31 700'~
SilIce, ir~ practice, it is the usual case that each co]umn 34 includes a tail 26 that is eonnccted to the predctermined ground potential it is anticipated that shield devices 50 in accordance with the invention will thererore, in use, be provided 5 over alternate columns of tails. Figure 3 l\lustrates a typ~eal instance of this arrangement. It should also be understood that the particular one of the tails in a column that is connected to ground potential may vary, possibly from column to column across the connector. Thus, in such instances the magnitude of the distances 10 90 and 92 will then depend upon the location of the particular one of the tails so connected to ground potential such that the interconnection between the grounded tail and the shield can occur.
However, it also lies within the contemplation of the 15 invention to si~e the interior transverse dimension 63 of the device 50 to a degree that the panels 58, 60 are able to encompass more than one of the columns of tails. That is, the interior dimension 63 may be substantially equal to or greater than twice the distance 36, or some other desired multiple thereof. In this even~ the clips 82, 20 84 on one of the panels w~ll contact against one of the ground potential tails while the clips 82, 84 on the other of the panels will contact against a different one of the grounded tails.
As an aid in holding the devices 50 in place securing means 110 for holding the shield dev~ces 50 in their desired 25 disposition over the selected column(s) of tails is provided. In the preferred instance ~he securing rneans 110 compfises an elongated comb-like member 112 formed from an insulating plastic material.
The member 1 12 includes a baseplate 1 14 having mounting abutments 116 at each end thereof. The abutments 116 are initially 30 provided wi~h upper and lower fastening tabs 118A, 118B. Each tab 1 18 has an aperture 1 19A, 1 19B respectively therein. An array of teeth 120 extends from the baseplate 112.
1 3 1 700~
The irldividual teeth 120 are arrangcd in pairs 122 across the length of the bascplate 114 (as shown in Figure 3), except near one end thereof, where a single, unpaired tooth 124 is provided. The gap 128 between the interior confronting surraces of the teeth 120 in a given pair 122 is substantially equal to the dimension 36 ~Figure 1) of a column 34 of tails 26. These gaps 128 between the interior confronting surfaces of the teeth in a given pair 122 of teeth are thus si~ed to accept the tails 26 of those columns 34 over which no shield device 50 is provided.
The distance 130 between the exterior surfaces of the teeth 120 in any given pair 122 of teeth is substantially equal to the exterior transverse distance 62 (Figure 2) of each of the shields 50.
The gap 132 between a first tooth in one pair of teeth and a second tooth disposed in an adjacent pair of teeth is also 15 substantially equal to the exterior transverse distance ~2 (Figure 2) of each of the shields 50. Thus these gaps 132 are si~ed to accommodate the device 50 and engage the exterior surfaces 58E, 60E of the panels 58, 60 of a shield 50. If the transverse exterior dimension 62 of the shield 50 Is enlarged, as discussed earlier, or if 20 the transverse dimension 62is diminished for electrical reasons, the above-discussed distances bet~,veen the surfaces on the teeth in a given pair of teeth and the distances between surfaces on teeth in adjacent pairs of teeth are commensurately altered.
The gaps 136 and 138 provided between the abutments 116 and the first pair 122 of teeth at one end of the baseplate 114 and between the other abutment 116 and the unpaired tooth 124 at ~he other end of the baseplate 114 are respectively sized to substantially equal the exterior transverse dimension 62 and substantially one-half of the exterior transverse dimension 62 of the 30 shield device 50. Thus, the member 112 may accommodate an arrangement of shield devices 50 in which the first column 34-1 of the tails 26 is covered by a shield device (in which event the end of the baseplate 114 having the larger gap 136 is used ad,)acent to that end of the connector 10) or in whieh the second column 34-2 of 1 3 1 700 -~
the tails is covered by a shield device 50 (in which event the end of the l~aseplate 114 having the smaller gap 138 is used to surround the exposed flrst column 34-1 of tails).
As noted the abutments 116 have fastening tabs 118A, 5 118B origillally provided thereon. Depending upon which end of the baseplate 114 (i.e., the end having the gap 136 or the end having the gap 138) is positioned adjacent to the end of the connector housing 16 the appropriate ta'b 1~8A, l18~3 is removed.
Thus the remaining tab 1 lB is po~itioned on the shelf 20 so that O the aperture 1 19 in the tab 118 registers with the opening 22 in the abutment 18. With the opening 22 and the aperture 119 aligned any suitable mounting hardware, such as the fastener schematically indicated at reference character 140 (which form part of the securing means 110) may pass to hold the member 112 15 and the connector 10 to the board 12. The member 112 may be used with either the embodiment of the invention shown in Figure 2 (in which the web 56 is parallel to the board 12) or in the embodiment of the invention shown in Figures 3 and 4 (in which the web 56 is perpendicularly to the board :l2). In a given 20 application some of the shields may be disposed as in Figure 2 and others as in Figure 3, if desired.
With reference to the plan view of the blank 142 shown in Figure 5, the manner in which the shield devices 50 are formed from the blank may be understood. Each of` the indiv~dual 25 developed shields 50 are connected to a lead frame 144 by a tab 146. In a ~irst manu~acturing operation, the dimple 108 is stamped into the panels 58, 60. Thereafter, using a progressive die pair, the ends of the clips 82, 84 are ~olded one hundred thirty five degrees along fold lines 150, 152 toward the panel with which they are 30 associated. l~he clips 82, 84 on each of the panels are then themselves folded along the fold lines 8B, 88. ~inally the member is folded along the ~old lines 52t 54 to define the panels 58, 60and the web 56. The comb 114 is fbrmed by extrusion from a die and subseguently sliced.
1~1700'1i Those skilled in the art, having the benerit of the teacl~ gs of the prcsent invention as hereinabove set ~orth, may effect nulllel-ous modirlcations thereto. It should be understood, however~ that such modil`lcations are to be construed to lie within 5 the contemplation of the present invention, as defined by the appellded claims.
TITLE
Ground Plane Shield Device For Right Angle Connectors BACKGROUND OF THE INVEN7rION
Field oî the Invention The present invention relates to a ground plane shield device ~r impedance and cross talk control between signal calTying conductors emanating from an electrical connector, and in particular, to such a shield device adaptedfor retro-fitting to a connector that has been previously mounted to a board.
Description of the Pnor_Art Controlling the interfering electrical effect than an electrical signal carried on a given conductor exerts on a signal carried on an adjacent conductor is especially important in high density connectors. Such control can be implemented in a variety of ways. For example, the most basic technique in a high density connector is to connector particular ones of the conductors to a predetermined ground potential, thereby causing such conductors to act similarlyto ground planes and thereky to isolate the signals carried on adjacent conductors.
An alternative approach is to provide separate ground plane structures in the connector. Exemplary of this alternative are the devices disclosed in United States Patent 4,232,929 (Zobawa) and United States Patent 4,558,917 (Kamono et al). In the latter patent the ground plane structures take the form of separate, spaced vertical plates disposed between adjacent columns of conductor tails emanating from a connector housing. United States Patent 3,601,756 ~Stroh~ discloses a connector in which a ground plane structure is sinuously wrapped about the signal carrying conductors. Copending Canadian application Senal Number 543,648 filed on August 04 1987 and copendîng Canadian application Serial Number 551,742 filed on N~vember 12 1987, both assigned to ~e assignes of ~e present ~, ..
invention, rclatc to shielding schemes for use in cables and in cable conrlectors.
It is more difflc-llt to control the impedance and crosstalk efrects in connectors that have not been previously dcsigned to contain suitable interference control structures once such a connector has bcen mounted in position on a circuit board substrate.
Accordingly, it is believed to be advantageous to provide a ground plane shield arrangement that is particularly adapted for 10 being expeditiously placed into use with a connector once the same has already been placed in position on a substrate.
SUMMARY OF THE INVENTION
The present invention relates to a ground plane shield 1~ device for use with a connector mounted to a generally planar substrate, the connector being of the type ha~ring a housing from which a plurality of terminal tails emanate. The tails are arranged in at least one, but typically a plurality of generally parallel columns.
Each of the tails has a flrst portion generally perpendicular to the 2(! housing, a second portion generally perpendicular to the substrate, and an intermediate portion connecting the flrst and the second portions .
The ground plane shield device comprises a conducting member formed to define a first and a second panel arr~nged in 2~ genera~ly confrontational spaced relationship with respect to each other, the panels defining a space therebetween. Each panel has at least a ~irst, connector, ed~e and a second, substrate, edge. A ~Irst and a second clip are disposed on each panel in corresponding locations along the connector and the substrate edges, respectively.
30 The clip along the connector edge of each of the panels and the clip along the substrate edge of each of the panels extend toward the corresponding clip on the other of the panels thereby to place the corresponding clips into predetermined close proximlty to each other. Each of the clips has a cutout therein, each cutout 1 3 1 7 0 0 At l~cillg si~ed to rcceive and to grasp a predetermincd portion of a prcdetermillcd one of thc tails in the column of tails, such that, in use, with the cutouts in the clips along the conncctor edges of the panels grasping the first portion of the prcdetermined one of the 5 tails in the col--mn and with the cutouts in the clips along the substrate edges of the panels grasping the substrate portlon of the same predetermined tail the intermediate portion of all of the tails in the column is received in the space between the panels.
In the preferred instance the member is formed to 10 define the panels by folding along a first fold line and along a second fo]d line generally parallel to the ~lrst whereby the ground plane shield device is a generally U-shaped member having a closed face defined between the fold lines and three open faces defined between corresponding edges of the panels.
BR~EF DESCRlPTlON OF THE DRAWINGS
The invention will be more fully understood from the following detailed description thereof, taken in connection with the accompanying drawings, which form a part of this application and '~ O in which:
Figure 1 is a rear perspective view of a prior art connector having an array of right angle conductor tails emanating therefrom;
Figure 2 is a highly stylized rear perspective view of a 25 ground plane shield device in accordance with the present invention with portions thereof removed for clarity of illustration, the shield device being disposed w~th respect to a substrate ~ith the closed end of the device parallel to the surface of the substrate:
Figure 3 is a front perspective view of a board mounted 30 connector such as shown in Figure 1 with the ground plane shield device in accordance with the present invention being disposed w~th respect thereto in an alternate position from that sh~wn in Figure 2, with one of the ground plane shield devices being exploded from its position, with securing means for securing the 131700~
sllield dcvice to the board being illustrated as in sccuring position (so]id lines~ and in retracted position (dotted lines);
Figure 4 is an en]arged view of the exploded portion of Figure 3 again with a portion of the securing means ~or securing the shield device to the board being illustrated as in securlng position (solid lines) and in retracted position (dotted lines); and Figure 5 is a plan view of a b1ank rrom which the grourld plane shield device in accordance with the present invention is form ed .
DF,TAII,ED DESCRlPrlON OF THE lNVENTION
l`hroughout the ~ollowing detai~ed descriptlon, similar reference numerals will refer to similar elements in all figures of the drawings.
Figure 1 illustrates a rear perspective view of a typical connector of the prior art generally indicated by reference character 10. Exemplary of connectors similar to the connector 10 shown in Figure 1 are the devices manufactured and sold ~r E. 1. Du Pont de Nemours and Company, Incorporated as the DIN 41612-'~0 series C connector and the DIN 41612-Series R connector. The connector 10 is suitably mounted to a substrate 12, such as a printed circuit or pnnted wire board in a manner to be discussed, although in Figure 1 it is spaced a predetermined distance thereabove for clarity of illustratlon.
2~ The connector 10 has a generally rectanguloid housing 16 formed of an insulating material. To effect the mounting of t~e connector 10 to the board 12 t e housing 16 is provided, in a typical instance, with a mounting abutment 18 at each end thereof.
Only one of the abutments 18 is shown in Figure 1. The abutment 18 has a planar shelf 20 thereon and a mounting opening 22 therethrough through which a mounting screw or the like may pass to secure the connector 10 to the board 12. The housing 16 extends a predetermined height dimension H above the surface of the board 12 when the connector 10 is mounted thereto.
1 31 70~-~
Disposed within the housing 16 is a plurality of electrical contacts of eithcr the male of female type. Each of the contacts has a ~ail generally indicated by the rercrence character 26 associ~ted therewith. In Figure 1 the tails 26 emanate from the 5 rear surface 30 of the housing 16 in an array containing a predetermiIled plurality N of vertical columns 34-1 though 34-N
(Figure 4). Only four such adjacent columns 34-1 through 34-4 are ShOWIl in Figure 1. Each column 34 contains a vertically aligned stack of conductor tails 26. Although any predetermined number of 10 tails 26 may be arranged in each stack, in Figure 1 each column 34 is shown to contain three such tails 26, with the top tail in a given column is indicated by the suffix "r', the middle tail being indicated by the suffix "M", and the bottom tail being indicated by the suffix"B".
It is a typical practice in the art that one of the eontacts associated with one of the tails 26 in each of the colurnns 34 be connected to a predetermined ground potential. As used herein, it should be emphasized that ground potential is referenced from the point of view of a signal carrying conductor. Thus, the terrn is construed herein to include power connections, chassis grounds, and logic grounds. The tail 26 itself therefore also lies at this predeterrnined ground potential. For purposes of discussion herein it is assumed that the middle tail 26M in each of the columns 34 is connected to this predetermined ground potential. ~,ach of the columns 34 has a predetermined transverse dimension 36 associated thcrewith, where the dimension 3Ei includes the transverse dimension of the tail 26 itself as well as ~ome predetermined buffer distance adjacent each side of each of the tails.
Each of the tails 26 compfises a first portion 38, a second portion 40 and a third portion 42. The ~irst portion 38 is termed the connector portion since it is in proximit~ to the rear surface 30 of the housing 16 and lies generally perpendicular thereto. The third portion 42 is termed the substrate portion since ~ 31 700 ~
it is proximal to and gcnerally perpendicularly arrangcd with respect to the substrate 12. When the connector 10 is aff~xed to the substrate 12 the third portion 40 of each of the tails 26 extends through an opening 14 prov~ded in the substrate 12. The second portion 40 is intermediate the flrst portion 38 and third portion 42 and, in the prior art connector illustrated, contains a generally right angle bend therein. Of course, it should be understood that the portions 38 and 42 need not, as is illustrated, be completely perpendicular to the connector and the board, nor, ~s illustrated, must the intermediate portion 40 be a right angle bend, inasmuch as the present invention may be configured ~or use with alternate configurations of these elements.
Figure 2 is a highly styli~ed rear perspective illustration of a ground plane shield device generally indicated by the reference character 50 in accordance with the present invention, with portions thereof removed for clarity. The device 50 is adapted to be retro-~it to a connector 10 already positioned on and secured to a substrate 12. The device 50, in the preferred case, comprises a member made of a conducting material, such as phosphor bronze or berylliurn copper. Preferably the dev~ce 50 is formed, as will be discussed, by ~olding the same along a first fold line 52 and a second fo]d line 54 to dehne a generally U-shaped structure having a web portion 56, a first panel 5~ and a second panel 60.
Each panel 58, 60 is generally square in shape and preferably has a dimension 61 that is selected such that when the device 5~ is in posStion about the tai~s (and there supported in a manner to be described~ the top sur~ace of the web 56 is spaced above the substrate 12 a distance substantially equal to the height dimension H of the housing 12. The panels 58, 60 each have an interior surface 581, 60~ and an exterior surface 58E, 60E thereon.
The exterior sur~ces 58E, 60E of the panels are spaced by a predetermined distance 62, while the interior surfaces are spaced a predetermined distanee 63. The distances 61, 62 and 63 can have any desired relationship with respect to each other, ~t being 13170~
only necessary that the distance 63 be substantially equal to the distance 36, for reasons that should bccome apparent herein.
It should be understood that the panels 58, 60 may be formcd by bendil-g or folding a planar member along a slngle, double (as i?~ustrated) or other predetermined number of multiple folds or by rolling the same and, in all events, remain within the contemplation of the present invention. Thus, for example, it should be understood that the device 50 may be formed with only one fold line, in which event the devicc has imparted thereto a generally V-shape. Alternately, more than two fold lines may be used to define the panels, in which event there is imparting a generally corrugated configuration to the web portion 56 of the device 50. Yet further, the member may be formed by rolling in which case the upper portion thereof will exhibit a generally domed 1 5 shape.
Each panel 58, 60 has a flrst, connector, edge 64, a second, substrate, edge 66, and a third, free, edge 68 thereon. The fourth edge of each panel 58, 60 is defined by the respective fold line 52, 54. l`he panels 58 and 60 lie generally parallel to each other in confrontational spaced-apart relationship. The panels 58, 60 and the web 56 cooperate to define an interior space 70. The device 50 has a first open face 72 deflned between the opposed connector edges 64 of the panels 58, 60, a second open face 74 defined between the opposed substrate 66 edges of the panels 58, 60, and a third open face 76 defined between the free edges 68 of the panels 58, 60. The fourth ~ace of the device 50 is closed by the web 56 defined between the fold lines 52, 54. In the embodiment shown in Figure 2 the web 56 is, in use, disposed generally parallel to and spaced in overlying relationship with respect to the substrate 12. However, the device 50 may be used with ~he web 56 disposed perpendicular to the surface of the substrate 12. Thus. as seen in the embodiment shown in Figures 3 and 4, the edges defining the connector edges 64 and the substrate edges 66 differ ~rom those shown in Figure 2. In Figures 3 and 4, the connector 1 3 ~ 7 o O !9r edges 64 are dcrlncd by the edges of the panels opposite from the fold lines 52, 54 dei~lning the web 56 while the substrate edges 66 are derlned by the edges adjacent to the web 56.
Each panel 58, 60 has a first clip 82 and a second clip 5 84 disposed in corresponding locations along the edges of the panels defining two of the three open faces. Tn the embodiment illustrated in Figure 2 the device 50 is shown to have clips 82, 84 on the faces 72, 74 respectively defined by corresponding connector edges 64 and corresponding substrate edges 66. That is, 10 in the embodiment of Figure 2 the c]ips 82 are provided on the face 72 defined on th~ connector edges 64 Iying adjacent to the web 66 and the clips 84 are defined on the substrate edges 76 that lie opposite from the web 56. In the embodiment illustrated in Figures 3 and 4 the device 50 is shown to have the clips 82 on the 15 face 74 defined by corresponding connector edges 66 and the clips 84 on the face 76 defined by corresponding substrate edges 68. It should be understood that consistent with the foregoing discussion the device 50 may be configured to have only two open faces (i~e., a connector face 72 and a substrate face 74) or more than three open 20 faces. if desired. Any of these alternative configurations is to be construed as Iyir~g within the contemplation of the invention.
Each clip 82 is formed on the respective panel on which it is disposed by folding the matelial Or the panel along a fold line 86 toward the confrontationally disposed other of the panels.
25 The clips 84 are formed on their respective panel in a similar manner by folding the material of the panel along a fold line 88 toward the confrontationally disposed other of the panels. Each of the fold lines 86, 88 lies generally parallel to the edge of the panel on which the clip is associated. The clips 82. 84 are spaced a 30 respective predetermined distance 90, 92 along the edge of the panel from which it is defined for a purpose to be made clearer herein .
-~ ~ 1 7 oo i'l~
Whcn formed thc conrronting pairs of clips 82, 84 lie are spaced apart a predetermined close distances 94, 95. The magnitudes Or the distances 94, 95 are related to the thickness dimension of sclectcd predetermined portions of the talls 26. It 5 shou]d be understood that the clips 82, 84 may take a variety of forms, so long as they are arranged so as to support the shield above the substrate and from the connector and so as to engage the predetermined portion of a selected one of the tails and thereby electlically connect each panel of the shield to the tail at both 10 points where the clips 82, 84 engage the same.
Each clip 82 has a cut-out 96 fonned therein, ~he cut-outs 96 being bounded on each side thereof by a lead-in surface 98.
Similarly, each of the clips 84 has a cut-out 99 formed therein. The cut-outs 99 are bounded on each side thereof by a lead-in surface 100. The panels 58, 60 are preferably slotted~ as at 102, 104, respectively, in the vicinity of the respective clips ~2, 84 to impart flexibility thereto. Each of the panels 58, 60 is also provided with a depression or dimple 108, for a purpose to be described.
In use, the shield device 50 is supported by the clips 20 82, 84 a predeterrnined distance 110 above the substrate 12 and a predetermined distance 114 from the surface 30 of the connector 10 to straddle a predetermined one of the columrls 34 of the tails 26 emanating from the surface 30 thereof. The desired final mounted position for the shield 50 is to dispose the cut-outs 96 on '~5 the clips 82 provided on the connector edges of the shield 50 in engagement against the connector portion 38 of the tail 26M (i.e., the tail connected to ground potential) and to dispose the cut-outs 98 on the clips ~34 provided on the substrate edges of the device 50 in engagement against the substrate portion 40 of the tail 26M.
30 When so engaged, the remainder of the tail 26M as well as the entirety of the remaining tails 26T and 26B in the selected column 34 lie within the space 70 encompassed by the confronting panels 58, 60 and the web 56 of the device 50. As the device 50 straddles the selected co]umn the dimples 108 on the panels 58, 60 abut 1~70~
agai-lst the intermediate porUon 42 of the tail 26M, thereby providing mourlting stability to the device 50, The distanccs 90, 92 are, thcrefore, selccted to position the clips 84, 86 so that they are respec~ively adjacent to the portion of the tail against which they 5 grasp and, simultaneously when so grasping the appropriate portion of the tai], to support the device 50 the distances 110, 114 from the subslrate 12 and the face 3t) of the connector 10. As noted earlier thc top surface of the web 56 should preferably be spaced aibove the substrate 12 a distance substantially equal to the height 1 0 dimension H of the housing 12.
The panels 58, 60 are introduced over the selected column 34 in a manner that brings one set of clips and then the other set of clips over the tails in the column. As the clips 82 and 84 are moved over the tails 26, they are urged apart owing to the 15 reaction of the lead-in 98, 100, as the case may be, against the tails 26. The resiliency imparted to the clips 82, 84 by the slots 102, 104, respectively, in ~he panels ~8, 60 assists in this action. Note that if the motion of the device 50 is sufficiently fast the clips 82, 84 move past any preceding tail 26 before the clip can resiliently 20 return into gripping position, thus to prevent a clip from clasping onto other than the tail of interest.
The gripping engagement of the clips 82, 84 and the tail 26M serves to properly terminate the panels 58, 60 and electrically interconnect the device 50 to the same potential at 25 which the tail 26M is maintained. For this purpose the dev~ce 50 is ~herefore, preferably fabncated of a conductive material. However, it should be understood that the member may be other than a conductor, if the interior surface of the panels thereof and the clips are lined with a conductive material to establish the electrical 30 connections to be discussed. The panels are sized to provide a sumciently ]arge surface so that ground return currents associated with the signal carrying conductors disposed within the space 70 and surrounded by the device 50 can ~low in the panels as needed to minimize the inductance associated with ~e ground path.
1~
1 31 700'~
SilIce, ir~ practice, it is the usual case that each co]umn 34 includes a tail 26 that is eonnccted to the predctermined ground potential it is anticipated that shield devices 50 in accordance with the invention will thererore, in use, be provided 5 over alternate columns of tails. Figure 3 l\lustrates a typ~eal instance of this arrangement. It should also be understood that the particular one of the tails in a column that is connected to ground potential may vary, possibly from column to column across the connector. Thus, in such instances the magnitude of the distances 10 90 and 92 will then depend upon the location of the particular one of the tails so connected to ground potential such that the interconnection between the grounded tail and the shield can occur.
However, it also lies within the contemplation of the 15 invention to si~e the interior transverse dimension 63 of the device 50 to a degree that the panels 58, 60 are able to encompass more than one of the columns of tails. That is, the interior dimension 63 may be substantially equal to or greater than twice the distance 36, or some other desired multiple thereof. In this even~ the clips 82, 20 84 on one of the panels w~ll contact against one of the ground potential tails while the clips 82, 84 on the other of the panels will contact against a different one of the grounded tails.
As an aid in holding the devices 50 in place securing means 110 for holding the shield dev~ces 50 in their desired 25 disposition over the selected column(s) of tails is provided. In the preferred instance ~he securing rneans 110 compfises an elongated comb-like member 112 formed from an insulating plastic material.
The member 1 12 includes a baseplate 1 14 having mounting abutments 116 at each end thereof. The abutments 116 are initially 30 provided wi~h upper and lower fastening tabs 118A, 118B. Each tab 1 18 has an aperture 1 19A, 1 19B respectively therein. An array of teeth 120 extends from the baseplate 112.
1 3 1 700~
The irldividual teeth 120 are arrangcd in pairs 122 across the length of the bascplate 114 (as shown in Figure 3), except near one end thereof, where a single, unpaired tooth 124 is provided. The gap 128 between the interior confronting surraces of the teeth 120 in a given pair 122 is substantially equal to the dimension 36 ~Figure 1) of a column 34 of tails 26. These gaps 128 between the interior confronting surfaces of the teeth in a given pair 122 of teeth are thus si~ed to accept the tails 26 of those columns 34 over which no shield device 50 is provided.
The distance 130 between the exterior surfaces of the teeth 120 in any given pair 122 of teeth is substantially equal to the exterior transverse distance 62 (Figure 2) of each of the shields 50.
The gap 132 between a first tooth in one pair of teeth and a second tooth disposed in an adjacent pair of teeth is also 15 substantially equal to the exterior transverse distance ~2 (Figure 2) of each of the shields 50. Thus these gaps 132 are si~ed to accommodate the device 50 and engage the exterior surfaces 58E, 60E of the panels 58, 60 of a shield 50. If the transverse exterior dimension 62 of the shield 50 Is enlarged, as discussed earlier, or if 20 the transverse dimension 62is diminished for electrical reasons, the above-discussed distances bet~,veen the surfaces on the teeth in a given pair of teeth and the distances between surfaces on teeth in adjacent pairs of teeth are commensurately altered.
The gaps 136 and 138 provided between the abutments 116 and the first pair 122 of teeth at one end of the baseplate 114 and between the other abutment 116 and the unpaired tooth 124 at ~he other end of the baseplate 114 are respectively sized to substantially equal the exterior transverse dimension 62 and substantially one-half of the exterior transverse dimension 62 of the 30 shield device 50. Thus, the member 112 may accommodate an arrangement of shield devices 50 in which the first column 34-1 of the tails 26 is covered by a shield device (in which event the end of the baseplate 114 having the larger gap 136 is used ad,)acent to that end of the connector 10) or in whieh the second column 34-2 of 1 3 1 700 -~
the tails is covered by a shield device 50 (in which event the end of the l~aseplate 114 having the smaller gap 138 is used to surround the exposed flrst column 34-1 of tails).
As noted the abutments 116 have fastening tabs 118A, 5 118B origillally provided thereon. Depending upon which end of the baseplate 114 (i.e., the end having the gap 136 or the end having the gap 138) is positioned adjacent to the end of the connector housing 16 the appropriate ta'b 1~8A, l18~3 is removed.
Thus the remaining tab 1 lB is po~itioned on the shelf 20 so that O the aperture 1 19 in the tab 118 registers with the opening 22 in the abutment 18. With the opening 22 and the aperture 119 aligned any suitable mounting hardware, such as the fastener schematically indicated at reference character 140 (which form part of the securing means 110) may pass to hold the member 112 15 and the connector 10 to the board 12. The member 112 may be used with either the embodiment of the invention shown in Figure 2 (in which the web 56 is parallel to the board 12) or in the embodiment of the invention shown in Figures 3 and 4 (in which the web 56 is perpendicularly to the board :l2). In a given 20 application some of the shields may be disposed as in Figure 2 and others as in Figure 3, if desired.
With reference to the plan view of the blank 142 shown in Figure 5, the manner in which the shield devices 50 are formed from the blank may be understood. Each of` the indiv~dual 25 developed shields 50 are connected to a lead frame 144 by a tab 146. In a ~irst manu~acturing operation, the dimple 108 is stamped into the panels 58, 60. Thereafter, using a progressive die pair, the ends of the clips 82, 84 are ~olded one hundred thirty five degrees along fold lines 150, 152 toward the panel with which they are 30 associated. l~he clips 82, 84 on each of the panels are then themselves folded along the fold lines 8B, 88. ~inally the member is folded along the ~old lines 52t 54 to define the panels 58, 60and the web 56. The comb 114 is fbrmed by extrusion from a die and subseguently sliced.
1~1700'1i Those skilled in the art, having the benerit of the teacl~ gs of the prcsent invention as hereinabove set ~orth, may effect nulllel-ous modirlcations thereto. It should be understood, however~ that such modil`lcations are to be construed to lie within 5 the contemplation of the present invention, as defined by the appellded claims.
Claims (44)
1. A ground plane shield device for use with a connector mounted to a generally planar substrate, the connector being of the type having a housing from which a plurality of terminal tails emanate, the tails being arranged in at least one column, the tails each having a first portion generally perpendicular to the housing, a second portion generally perpendicular to the substrate, and an intermediate portion connecting the first and the second portions, the shield comprising:
a conducting member formed to define a first and a second panel arranged in generally confrontational spaced relationship with respect to each other, the panels defining a space therebetween, each panel having at least a first, connector, edge and a second, substrate, edge;
a first and second clip disposed on each panel in corresponding locations along the connector and the substrate edges, respectively, the clip along the connector edge of each of the panels and the clip along the substrate edge of each of the panels extending toward the corresponding clip on the other of the panels thereby to place the corresponding clips into predetermined close proximity to each other, each of the clips being arranged to receive and to grasp a predetermined portion of a predetermined one of the tails in the column of tails thereby to support the device above a substrate and to connect electrically the tails to the panel, such that, in use, with the cutouts in the clips along the connector edges of the panels grasping the first portion of the predetermined one of the tails in the column and with the cutouts in the clips along the substrate edges of the panels grasping the substrate portion of the same predetermined tail the intermediate portion of all of the tails in the column is received in the space between the panels.
a conducting member formed to define a first and a second panel arranged in generally confrontational spaced relationship with respect to each other, the panels defining a space therebetween, each panel having at least a first, connector, edge and a second, substrate, edge;
a first and second clip disposed on each panel in corresponding locations along the connector and the substrate edges, respectively, the clip along the connector edge of each of the panels and the clip along the substrate edge of each of the panels extending toward the corresponding clip on the other of the panels thereby to place the corresponding clips into predetermined close proximity to each other, each of the clips being arranged to receive and to grasp a predetermined portion of a predetermined one of the tails in the column of tails thereby to support the device above a substrate and to connect electrically the tails to the panel, such that, in use, with the cutouts in the clips along the connector edges of the panels grasping the first portion of the predetermined one of the tails in the column and with the cutouts in the clips along the substrate edges of the panels grasping the substrate portion of the same predetermined tail the intermediate portion of all of the tails in the column is received in the space between the panels.
2. The ground plane shield device of claim 1 wherein the member is formed by folding along at least one fold line to define the panels.
3. The ground plane shield device of claim 2 wherein the clips are placed into predetermined close proximity to each other by folding each of the clips along predetermined fold lines.
4. The ground plane shield device of claim 1 wherein the clips are placed into predetermined close proximity to each other by folding each of the clips along predetermined fold lines.
5. The ground plane shield device of claim 1 further comprising means for securing the shield to the substrate.
6 The ground plane shield device of claim S wherein the panels each have an exterior surface thereon and wherein exterior surfaces are separated by a predetermined dimension, the securing means comprising a comb having a baseplate having a pair of teeth, each of the teeth having an exterior surface thereon, the exterior surfaces of the teeth being spaced apart by a predetermined spacing, the spacing between the exterior surfaces of the teeth being substantially equal to the dimension between the exterior surfaces of the panels.
7. The ground plane shield device of claim 6 wherein the baseplate has a mounting abutment thereon, the mounting abutment being spaced from the exterior surface of one of the teeth by a predetermined distance substantially equal to one-half the predetermined distance by which the exterior surfaces of the paired teeth are spaced.
8. The ground plane shield device of claim 6 wherein wherein the baseplate has a mounting abutment thereon, the mounting abutment being spaced from the exterior surface of one of the teeth by a predetermined distance substantially equal to the predetermined distance by which the exterior surfaces of the paired teeth are spaced.
9. The ground plane shield device of claim 8 wherein the connector housing has a mounting opening therein, and wherein the mounting abutment has a mounting aperture therein, the aperture in the mounting abutment being positionable in registered relationship with the opening in the connector housing.
10. The ground plane shield device of claim 7 wherein the connector housing has a mounting opening therein, and wherein the mounting abutment has a mounting aperture therein, the aperture in the mounting abutment being positionable in registered relationship with the opening in the connector housing.
11. The ground plane shield device of claim 5 wherein the panels each have an exterior surface thereon and wherein exterior surfaces are separated by a predetermined dimension, the securing means comprising a comb having a baseplate having a first tooth and a second tooth disposed in adjacent confrontational relationship, each of the teeth having a surface thereon, the surfaces of the teeth being spaced apart by a predetermined spacing, the spacing between the surfaces of the teeth being substantially equal to the dimension between the exterior surfaces of the panels.
12. The ground plane shield device of claim 5 wherein the the column of tails has a predetermined transverse dimension associated therewith, the securing means comprising a comb having a baseplate having a pair of teeth, each of the teeth having an interior surface thereon, the interior surfaces of the teeth being spaced apart by a predetermined spacing, the spacing between the interior surfaces of the teeth being substantially equal to the transverse dimension of the column of tails.
13. The ground plane shield device of claim 4 wherein the panels are each slotted in the vicinity of the clips whereby the clips are resiliently movable with respect to the panel to which they are connected.
14. The ground plane shield device of claim 3 wherein the panels are each slotted in the vicinity of the clips whereby the clips are resiliently movable with respect to the panel to which they are connected.
15. The ground plane shield device of claim 2 wherein the panels are each slotted in the vicinity of the clips whereby the clips are resiliently movable with respect to the panel to which they are connected.
16. The ground plane shield device of claim 1 wherein the panels are each slotted in the vicinity of the clips whereby the clips are resiliently movable with respect to the panel to which they are connected.
17. The ground plane shield device of claim 16 wherein the panels each have a depression therein, the depressions being disposed at corresponding locations in the panels arranged such that, in use, the depressions engage the intermediate portion of one of the tails in the column.
18. The ground plane shield device of claim 15 wherein the panels each have a depression therein, the depressions being disposed at corresponding locations on the panels arranged
19 such that, in use, the depressions engage the intermediate portion of one of the tails in the column.
19. The ground plane shield device of claim 2 wherein the connector housing has a predetermined height dimension associated therewith and wherein the panels each have a predetermined height dimension associated therewith, the height dimension of the panels being substantially equal to the height dimension of the connector housing.
19. The ground plane shield device of claim 2 wherein the connector housing has a predetermined height dimension associated therewith and wherein the panels each have a predetermined height dimension associated therewith, the height dimension of the panels being substantially equal to the height dimension of the connector housing.
20. The ground plane shield device of claim 1 wherein the connector housing has a predetermined height dimension associated therewith and wherein the panels each have a predetermined height dimension associated therewith, the height dimension of the panels being substantially equal to the height dimension of the connector housing.
21. A ground plane shield device for use with a connector mounted to a generally planar substrate, the connector being of the type having a housing from which a plurality of terminal tails emanate, the tails being arranged in at least two adjacent columns with each column having a predetermined number of tails therein, each tail having a first portion generally perpendicular to the housing, a second portion generally perpendicular to the board, and an intermediate portion connecting the first and the second portions, at least a predetermined one of the tails in at least one column being connectable to ground potential, the ground plane shield device comprising:
a conducting member folded along at least one fold line to define a first and a second panel arranged in generally confrontational spaced relationship with respect to each other, the panels defining a space therebetween, each panel having at least a first, connector, edge and a second, substrate, edge, a first and second clip disposed on each panel in corresponding locations along the connector and the substrate edges, respectively, the clip along the connector edges of each of the panels and the clip along the substrate edges of each of the panels being folded along predetermined fold lines to extend toward the corresponding clip on the other of the panels thereby to place the corresponding clips into predetermined close proximity to each other, each of the clips having cutouts therein, the cutouts in the clips along the connector edges of the panels being sized to accept the first portion of a predetermined one of the tails in a first of the columns connectable to ground potential while the cutouts in the clips along the substrate edges of the panels being sized to accept the substrate portion of the same predetermined one of the tails in the first of the columns, the clips thereby acting to support the device above a substrate and to connect electrically the tails to the panel, such that, in use, the intermediate portion of all of the tails in the column having the predetermined tail therein is received in the space between the panels.
a conducting member folded along at least one fold line to define a first and a second panel arranged in generally confrontational spaced relationship with respect to each other, the panels defining a space therebetween, each panel having at least a first, connector, edge and a second, substrate, edge, a first and second clip disposed on each panel in corresponding locations along the connector and the substrate edges, respectively, the clip along the connector edges of each of the panels and the clip along the substrate edges of each of the panels being folded along predetermined fold lines to extend toward the corresponding clip on the other of the panels thereby to place the corresponding clips into predetermined close proximity to each other, each of the clips having cutouts therein, the cutouts in the clips along the connector edges of the panels being sized to accept the first portion of a predetermined one of the tails in a first of the columns connectable to ground potential while the cutouts in the clips along the substrate edges of the panels being sized to accept the substrate portion of the same predetermined one of the tails in the first of the columns, the clips thereby acting to support the device above a substrate and to connect electrically the tails to the panel, such that, in use, the intermediate portion of all of the tails in the column having the predetermined tail therein is received in the space between the panels.
22. The ground plane shield device of claim 21 wherein the conducting member is folded along a second fold line generally parallel to the first, and wherein the panels each have a first, a second and a third edge, one of which is the connector edge and another of which is the substrate edge, whereby the shield is a generally U-shaped member having a closed face defined between the fold lines and three open faces defined between corresponding edges of the panels.
23. The ground plane shield device of claim 22 wherein the connector edges of the panels are on an open face of the shield adjacent to the closed face and wherein the substrate edges of the panels are on an open face of the shield opposite from the closed face.
24. The ground plane shield device of claim 22 wherein the connector edges of the panels are on an open face of the shield opposite from the closed face and wherein the substrate edges of the panels are on an open face of the shield adjacent to the closed face.
25. The ground plane shield device of claim 24 further comprising means for securing the shield to the substrate.
26. The ground plane shield device of claim 25 wherein the panels each have an exterior surface thereon and wherein exterior surfaces are separated by a predetermined dimension, the securing means comprising a comb having a baseplate having a pair of teeth, each of the teeth having an exterior surface thereon, the exterior surfaces of the teeth being spaced apart by a predetermined spacing, the spacing between the exterior surfaces of the teeth being substantially equal to the dimension between the exterior surfaces of the panels.
27. The ground plane shield device of claim 26 wherein the baseplate has a mounting abutment thereon, the mounting abutment being spaced from the exterior surface of one of the teeth by a predetermined distance substantially equal to one-half the predetermined spacing by which the exterior surfaces of the teeth are spaced.
28. The ground plane shield device of claim 25 wherein the baseplate has a mounting abutment thereon, the mounting abutment being spaced from the exterior surface of one of the teeth by a predetermined distance substantially equal to the predetermined spacing by which the interior surfaces of the teeth are spaced.
29. The ground plane shield device of claim 28 wherein the connector housing has a mounting opening therein, and wherein the mounting abutment has a mounting aperture therein, the aperture in the mounting abutment being positionable in registered relationship with the opening in the connector housing.
30. The ground plane shield device of claim 27 wherein the connector housing has a mounting opening therein, and wherein the mounting abutment has a mounting aperture therein, the aperture in the mounting abutment being positionable in registered relationship with the opening in the connector housing.
31. The ground plane shield device of claim 25 wherein the panels each have an exterior surface thereon and wherein exterior surfaces are separated by a predetermined dimension, the securing means comprising a comb having a baseplate having a first tooth and a second tooth disposed in adjacent confrontational relationship, each of the teeth having a surface thereon, the surfaces of the teeth being spaced apart by a predetermined spacing, the spacing between the surfaces of the teeth being substantially equal to the dimension between the exterior surfaces of the panels.
32. The ground plane shield device of claim 25 wherein the the column of tails has a predetermined transverse dimension associated therewith, the securing means comprising a comb having a baseplate having a pair of teeth, each of the teeth having an interior surface thereon, the interior surfaces of the teeth being spaced apart by a predetermined spacing, the spacing between the interior surfaces of the teeth being substantially equal to the transverse dimension of the column of tails.
33. The ground plane shield device of claim 23 further comprising means for securing the shield to the substrate.
34. The ground plane shield device of claim 33 wherein the panels each have an exterior surface thereon and wherein exterior surfaces are separated by a predetermined dimension, the securing means comprising a comb having a baseplate having a pair of teeth, the teeth having an interior surface thereon, the interior surfaces of the teeth being spaced apart by a predetermined spacing, the spacing between the interior surfaces of the teeth being substantially equal to the dimension between the exterior surfaces of the panels.
35. The ground plane shield device of claim 34 wherein the teeth each have an exterior surface thereon and wherein the baseplate has a mounting abutment thereon, the mounting abutment being spaced from the exterior surface of one of the teeth by a predetermined distance substantially equal to one-half the predetermined spacing by which the interior surfaces of the teeth are spaced.
36. The ground plane shield device of claim 33 wherein the teeth each have an exterior surface thereon and wherein the baseplate has a mounting abutment thereon, the mounting abutment being spaced from the exterior surface of one of the teeth by a predetermined distance substantially equal to the predetermined spacing by which the interior surfaces of the teeth are spaced.
37. The ground plane shield device of claim 36 wherein the connector housing has a mounting opening therein, and wherein the mounting abutment has a mounting aperture therein, the aperture in the mounting abutment being positionable in registered relationship with the opening in the connector housing.
38. The ground plane shield device of claim 35 wherein the connector housing has a mounting opening therein, and wherein the mounting abutment has a mounting aperture therein, the aperture in the mounting abutment being positionable in registered relationship with the opening in the connector housing.
39. The ground plane shield device of claim 33 wherein the panels each have an exterior surface thereon and wherein exterior surfaces are separated by a predetermined dimension, the securing means comprising a comb having a baseplate having a first tooth and a second tooth disposed in adjacent confrontational relationship, each of the teeth having a surface thereon, the surfaces of the teeth being spaced apart by a predetermined spacing, the spacing between the surfaces of the teeth being substantially equal to the dimension between the exterior surfaces of the panels.
40. The ground plane shield device of claim 33 wherein the the column of tails has a predetermined transverse dimension associated therewith, the securing means comprising a comb having a baseplate having a pair of teeth, each of the teeth having an interior surface thereon, the interior surfaces of the teeth being spaced apart by a predetermined spacing, the spacing between the interior surfaces of the teeth being substantially equal to the transverse dimension of the column of tails.
41. The ground plane shield device of claim 24 wherein the panels each have a depression therein, the depressions being disposed at corresponding locations on the panels arranged such that, in use, the depressions engage the intermediate portion of one of the tails in the column.
42. The ground plane shield device of claim 23 wherein the panels each have a depression therein, the depressions being disposed at corresponding locations on the panels arranged such that, in use, the depressions engage the intermediate portion of one of the tails in the column.
43. The ground plane shield device of claim 22 wherein the panels each have a depression therein, the depressions being disposed at corresponding locations on the panels arranged such that, in use, the depressions engage the intermediate portion of one of the tails in the column.
44. The ground plane shield device of claim 21 wherein the panels each have a depression therein, the depressions being disposed at corresponding locations on the panels arranged such that, in use, the depressions engage the intermediate portion of one of the tails in the column.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/285,461 US4898546A (en) | 1988-12-16 | 1988-12-16 | Ground plane shield device for right angle connectors |
| US07/285461 | 1988-12-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1317004C true CA1317004C (en) | 1993-04-27 |
Family
ID=23094328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000614400A Expired - Fee Related CA1317004C (en) | 1988-12-16 | 1989-09-29 | Ground plane shield device for right angle connectors |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US4898546A (en) |
| CA (1) | CA1317004C (en) |
Families Citing this family (37)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5035631A (en) * | 1990-06-01 | 1991-07-30 | Burndy Corporation | Ground shielded bi-level card edge connector |
| US5133679A (en) * | 1990-06-08 | 1992-07-28 | E. I. Du Pont De Nemours And Company | Connectors with ground structure |
| US5141453A (en) * | 1990-06-08 | 1992-08-25 | E. I. Du Pont De Nemours And Company | Connectors with ground structure |
| AU7736691A (en) * | 1990-06-08 | 1991-12-12 | E.I. Du Pont De Nemours And Company | Connectors with ground structure |
| US5261829A (en) * | 1990-06-08 | 1993-11-16 | Fusselman David F | Connectors with ground structure |
| US5259772A (en) * | 1990-06-08 | 1993-11-09 | E. I. Du Pont De Nemours And Company | Connectors with ground structure |
| US5228864A (en) * | 1990-06-08 | 1993-07-20 | E. I. Du Pont De Nemours And Company | Connectors with ground structure |
| US5151036A (en) * | 1990-06-08 | 1992-09-29 | E. I. Du Pont De Nemours And Company | Connectors with ground structure |
| US5055069A (en) * | 1990-06-08 | 1991-10-08 | E. I. Du Pont De Nemours And Company | Connectors with ground structure |
| US5044984A (en) * | 1990-06-22 | 1991-09-03 | Amp Incorporated | Stackable connector assembly and bracket therefor |
| DE4027509C2 (en) * | 1990-08-30 | 1996-12-19 | Molex Inc | Multipole connector with angled connection legs |
| JPH05326087A (en) * | 1991-08-15 | 1993-12-10 | Du Pont Singapore Pte Ltd | Connector and electric connecting structure using above described connector |
| US5199886A (en) * | 1991-11-19 | 1993-04-06 | Amp Incorporated | Shrouded connector assembly |
| US5310354A (en) * | 1992-03-20 | 1994-05-10 | E. I. Du Pont De Nemours And Company | Integral ground terminal and tail shield |
| IL106494A (en) * | 1992-09-08 | 1996-10-31 | Whitaker Corp | Shielded data connector |
| US5295867A (en) * | 1992-12-23 | 1994-03-22 | Itt Corporation | Edge connector shield |
| NL9202301A (en) * | 1992-12-31 | 1994-07-18 | Du Pont Nederland | Connector with improved shielding. |
| US5620340A (en) * | 1992-12-31 | 1997-04-15 | Berg Technology, Inc. | Connector with improved shielding |
| US5376021A (en) * | 1993-02-05 | 1994-12-27 | Thomas & Betts Corporation | Enhanced performance data connector |
| US5403206A (en) * | 1993-04-05 | 1995-04-04 | Teradyne, Inc. | Shielded electrical connector |
| US5593311A (en) * | 1993-07-14 | 1997-01-14 | Thomas & Betts Corporation | Shielded compact data connector |
| EP0677895A3 (en) * | 1994-04-14 | 1996-09-11 | Siemens Ag | Connector for backplanes. |
| WO1995033289A1 (en) * | 1994-05-26 | 1995-12-07 | The Whitaker Corporation | Surface mount electrical connector with improved grounding element |
| DE4446098C2 (en) * | 1994-12-22 | 1998-11-26 | Siemens Ag | Shielded electrical connector |
| US6152742A (en) * | 1995-05-31 | 2000-11-28 | Teradyne, Inc. | Surface mounted electrical connector |
| US5842887A (en) * | 1995-06-20 | 1998-12-01 | Berg Technology, Inc. | Connector with improved shielding |
| FR2752098B1 (en) * | 1996-08-02 | 1998-08-28 | Framatome Connectors Int | CONNECTOR ASSEMBLY |
| US6227882B1 (en) | 1997-10-01 | 2001-05-08 | Berg Technology, Inc. | Connector for electrical isolation in a condensed area |
| US6184460B1 (en) * | 1998-02-27 | 2001-02-06 | Berg Technology, Inc. | Modular box shield for forming a coaxial header |
| US6443740B1 (en) | 1998-10-15 | 2002-09-03 | Fci Americas Technology, Inc. | Connector system |
| US6174202B1 (en) | 1999-01-08 | 2001-01-16 | Berg Technology, Inc. | Shielded connector having modular construction |
| US6116926A (en) * | 1999-04-21 | 2000-09-12 | Berg Technology, Inc. | Connector for electrical isolation in a condensed area |
| US6743049B2 (en) | 2002-06-24 | 2004-06-01 | Advanced Interconnections Corporation | High speed, high density interconnection device |
| US7048585B2 (en) * | 2003-12-23 | 2006-05-23 | Teradyne, Inc. | High speed connector assembly |
| GB2428907A (en) * | 2005-08-05 | 2007-02-07 | Eds Developments Ltd | Shielded socket assembly |
| US7244149B1 (en) * | 2006-09-15 | 2007-07-17 | Tdi Technology Co., Ltd. | Connector structure that provides secure connection |
| US20090227124A1 (en) * | 2008-03-06 | 2009-09-10 | Cinch Connectors, Inc. | Electrical connector |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3601756A (en) * | 1969-08-14 | 1971-08-24 | Burroughs Corp | Terminator connector for multiconductor cable |
| CA1098600A (en) * | 1977-12-22 | 1981-03-31 | Donald P.G. Walter | Electrical connector shielded against interference |
| DE2832243C3 (en) * | 1978-07-21 | 1982-03-11 | Siemens AG, 1000 Berlin und 8000 München | Multi-row connector with fitted shield plate |
| EP0107288B1 (en) * | 1982-09-07 | 1986-03-19 | AMP INCORPORATED (a New Jersey corporation) | Electrical connector assembly for terminating flat shielded electrical cable |
| US4552420A (en) * | 1983-12-02 | 1985-11-12 | E. I. Du Pont De Nemours And Company | Electrical connector using a flexible circuit having an impedance control arrangement thereon |
| JPH0746622B2 (en) * | 1986-05-30 | 1995-05-17 | アンプ インコ−ポレ−テツド | Multi-pole shield connector |
-
1988
- 1988-12-16 US US07/285,461 patent/US4898546A/en not_active Expired - Lifetime
-
1989
- 1989-09-29 CA CA000614400A patent/CA1317004C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US4898546A (en) | 1990-02-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |