CA1282132C - Edge connector for circuit boards - Google Patents
Edge connector for circuit boardsInfo
- Publication number
- CA1282132C CA1282132C CA000561575A CA561575A CA1282132C CA 1282132 C CA1282132 C CA 1282132C CA 000561575 A CA000561575 A CA 000561575A CA 561575 A CA561575 A CA 561575A CA 1282132 C CA1282132 C CA 1282132C
- Authority
- CA
- Canada
- Prior art keywords
- contact
- contacts
- edge connector
- slot
- board
- 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
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
- H01R12/725—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 presenting a contact carrying strip, e.g. edge-like strip
Abstract
Abstract of the Disclosure An edge connector for electrically connecting and mechanically securing a daughter board to a mother board.
The edge connector includes an insulator body with a pair of stalks spaced apart so as to accomodate a daughter board therebetween. The insulator body is provided with a number of contacts, each of which is housed inside a contact slot inside the insulator body. Each contact has a surface pressure contact area for electrically connecting to the mother board to which the edge connector is attached. Each contact also has a contact area that extends into the daughter board slot. The contacts are arranged so that in each pair of adjacent contacts one contact has an upper contact area and the other a lower contact area. The upper contact areas are located above the lower contact areas. This makes it poossible to use a daughter board with two rows of offset contact pads with this edge connector.
The edge connector includes an insulator body with a pair of stalks spaced apart so as to accomodate a daughter board therebetween. The insulator body is provided with a number of contacts, each of which is housed inside a contact slot inside the insulator body. Each contact has a surface pressure contact area for electrically connecting to the mother board to which the edge connector is attached. Each contact also has a contact area that extends into the daughter board slot. The contacts are arranged so that in each pair of adjacent contacts one contact has an upper contact area and the other a lower contact area. The upper contact areas are located above the lower contact areas. This makes it poossible to use a daughter board with two rows of offset contact pads with this edge connector.
Description
2~3~
, Field of the Invention -This invention relates to electro-mechanic~l connectors for circuit boards, and more particularly to edge connector~ that mechanically secure and electrically connect the edge portions of circuit boards.
Background of the Invention Electrical connectors are designed to provide conductive paths between adjacent printed circuit boards.
Some connectors also mechenically seize the board~ to which they are connected so as to physicelly secure one boerd to the edjecent boerd. Connectors of this type are often instelled on e prim2ry, or "mother~ bo3rd, and are adepted to receive the edges of secondery, or "deughter"
boards. These connectors are celled edge connectorC and ere used in modern electricel e~uipment that contain~ e number of pare]lel daughter boerds that ere closely pecked together.
Edge connectors often comprise a number of conductive contects that are spaced apert and erranged linearly in a housing. Each contact is metellic, and is ~ositioned to abut a conductive contact pad on the edge of the daughter board. Often the contects are arranged in two parallel rows so the daughter board can be inserted therebetween. When a daughter board is positioned between the rows, the contacts exert a 3~ ~ 3 gripping force on the dzughter board so as to secure it in the housing.
There are a number of disadvzntagec to the edge connectors currently in use. The conductors of most of these connectors have vertical stems that must be solder-connected to plated through holes in the mother board.
Providing the mother board with a large number of plated through holes consumes 2 significant are2 on the bo~rd and reauires that conductors ?nd other circuit components on the board be designed around them. ~oreover, it is difficult to change the edge connector~ on a board since they are semi-permznently attached to the board.
In 2ddition, the mechanism many edge connector~ use to secure the daughter boards is inefficient. ~ome edge connectors rely on Zero Incertion Force, (ZIF) mechanisms. The contacts of these connectors are in registration with a czm rod so that at le~st one of the parallel rows of contact connectors can be selectively moved towards or away from the oppocite row. Initially, the contacts are spzced ap~rt from each other. After the daughter board is inserted between the opposed rows of contacts, the rows are moved together so as to arip the daughter board therebetween. ZIF connectors rely on relatively expensive mechanic21 mechanisms to secure the daughter boards. Furthermore, the securing mechanism is ~X8~32 formed of a number of moveable parts r any of which m?y malfunction because of either wear or breakzge.
Other edge connectors rely on Low Insertion Force, (LIF) contacts. These contacts are pieces that h~ve been stamped and bent to have a shape with spring-]ike resiliant characteristics. Fventually though, the contacts lose their resiliency and are deformed into a permanently open sha~e. ~hen 2 daughter board is placed between the worn contacts they do not firm]y abut the daughter board. As a result, they no longer secure the d2ughter board to the housing, nor do they make a reliab]e electric~l connection with the daughter bo~rd's contact pads.
Moreover, only a limited number of electric?l connections can be made per unit length of the d~ughter board. This is because the individual contact padc on the daughter bo?rd h?ve to h?ve a minimum width to insure that there is ? sufficient are~ of contact between them and the connector contacts-to form-a-cont-inuous electric?l path with minim~l re~istance. Also, the contact padc must be spaced apart a sufficient distance so that under normal operation conditions adjacent padc will not short circuit. Current contact p?ds have a cross-sectional width of 80 mils (0.080") and ?re sp?ced apart approximately 20 mils. ~hus, each contact pad and insul?ting 9?p occupies 100 ~ils of length, so a m?ximum . . . _ . _ ~2~ Z ~3~
of 10 contacts per inch of daughter bo~rd c~n be accommodated. The increasing miniaturization of electronic circuits requires that more connections per ~nit length of board be made ~vailable.
Furthermore, some edge connectors provide only signal contacts to the daughter bo2rd. They are not suited to transfer the Fower needed to oper2te components that may be located on the daughter boards.
Summary of the Invention A principle object of thi~ invention therefore is to provide an edge connector with contacts that do not h~ve to be permanently or semi-perm2nently attached to the mother board. Th~s, mounti~? of this connector on the mother bo~rd does not reouire the extensive relocetion of other components and conductors around it. A further object of this invention is to provide a connector with contacts that are able to sec~re the da~ghter board.
Furthermole, the contacts are able to withstand the stress of repeated insertion and removal of daughter boards without becoming worn. Moreover, the contacts are arranged to provide a larqe number of electrical connections per unit length along the d2ughter bo~rds.
Still another object of this invention is to provide an edge connector able to tran~fer both signal and power currents to and from the dcughter board.
These and other objects of this invention are provided by an edge connector comprising a insulator module containing two parellel rows of spaced-?part, flexible contacts. Fach cont?ct is p~ired with a contact loc?ted directly across from it. A board slot i5 defined by a space in the module between the rows of contacts.
Each contact includes ? contact area that extends into the board slot space. The cont?cts are arranged so that in each row, the contact areas of adjacent contacts are longitudinally offset from each other. ~ore specific?lly, for each pair of adj?cent contacts one has a upper contect area, and the other a lower contact area, wherein the upper contact are? is spaced above the lower contact ?rea. ~he contects are ?lso arranged ~o th?t a contact with an upper contact ?ree is loc?ted directly across from e cont?ct with ? lower contact ?rea. ~hus, one row of contacts includes contect areas arrenged in ?
upper-lower-upper-lower pattern, and the opposite row includes contact areas arranged in a lower-upper-lower-upper pattern. Each cont?ct is urged away from the bo?rd slot by a pre-102d barrier, integral with the module, th?t is loc?ted ebove the contact.
The edge connector module c?n be supplied with both thin-profile signal contacts and wide-profile power contects. The signal contacts are formed from blanking out of flat stock. ~oth types of contacts ~re provided ~LZ8~L3 with ~urface pressure cont~cts that abut contact pad~ on the mother board the edge connector is attached to.
The edge connector is used by first mounting it on the mother board. The surface pressure contæcts impinge on mother board contact pads so as to form an electric71 path therebetween. ~ daughter board is then f~stened to the edge connector by inserting its edge into the board slot. The resilient properties of the contact~ cause their contact are~s to prec~ ag~inst the d2ughter board.
~he daughter board is thus secured between the two rows of contacts pressing ag2inst it. Furthermore, the contact area of e2ch cont~ct impinges upon a separate contact pad on the daughter board so ~s to form an electrical path therebetween. ~hvs, each contact serves ~s a conductive link that connects a d~ughter board cont~ct pad to 2 complement~ry contact p~d on the mother bo?rd .
There ~re a number of ~dv~ntages to this edge connector. Since in each row the contact areas of adj2cent contactC are offset, the contact pads on the daughter boards can similarly be offset. Thus, it is possible to provide each side of the d~ughter bo~rd with two rows of contact p~ds. ~his doubles the number of electrical connections av~ilable per unit lenyth of daughter bo~rd w;thout reducing the re~uired tolerences - ~8~3~
between the contact pads or without redvcing the size of the contact pads.
Also, the signal contacts are each relative]y resilient. This is in part because the contact~ ~re profiled out of fl2t stock rather ~han pressed into shape like tradition21 contacts. As a result the contacts ~re not prone to become bent out of shape with the subse~uently loss of resiliency. Furthermore, the pre-]oad barriers insure the contacts exert sufficeint normal force against the daughter board with only a minimal amount of displacement. This insures the long term flexibility of the contacts since they are not stretched out of their normal range of elasticity.
Furthermore, providing the surface pressure contacts eliminates the need to provide plated through holes on the mother board. This simplifies the need to design the mother board circuitry around the edge connector. This also makes it unnecessary to attach the contacts by soldering or other semi-permanent means, m~king it simpler to remove and replace the edge connector.
Also, the cont2cts of this invention are side loaded into the module. This means the normal force exerted by the contacts on the insulator module is a function of the contacts' position relative to the module. Thus, the normal force the contacts exert can be easily adj~sted by inserting the contacts in a different module.
1;3~
Other advantages of this invention will become obvious as a preferred embodiment of the invention is described~
Detailed Dæscription Of The Drawings Figure 1 is a perspective view of the basic edge connector module of this invention.
Figure 2 is a partial top plan view of the basic edge connection module of this invention.
Figvre 3 ic a cross-sectional of the basic edge connector module of this invention taken along line 3-3 in Figvre 2.
Figure 4 is a view of a plur21ity of contacts of this invention blanked from flat stock.
Figure 5 is a cide view of the terminal pads of a daughter board to be used with the edge connector of this invention.
Figure 6 is an exposed side view of an edge connector housing containing a number of edge connector modules.
Figure 7 is a top view of an edge connector of this invention containing both signal and power contacts.
3'2 Detailed_Description Of The Preferred Embodiment Figures 1 and 2 illustrate an edge connector module 10 comprising an insulator body 12 that cont~ins 2 number of contacts 14a and 14b. The insulator body includes z base section 16 with a wide cros~-sectional area and two symmetric, spaced apart stem sections 18 that extend up from the base ?nd are spaced apart to form a board slot 20 therebetween. m e contacts 14 are arranged in two rows 17a, 17b located on opposite sides of the board clot. Each cont~ct is loczted in a contact slot 21 that are arr2nged in symmetric pairs across the bo2rd slot 20.
Fach contact slot is located in one half of th~' bace section 16 and in the adjacent stem section 1~. The contacts are loaded into the slots 21 thro~gh side openings 22 located along the body 12. The insulator body 12 also include~ at lea~t one alignment pin 23, ~Fig. 3,) that projects downwzrd from the base section 16.
The contacts 14 zre zrranged in the rows 17 so that upper contacts 14~ alternate with lower contacts 14b.
The upper contacts 14a each have an upper contact ~rea 40a that extends into the board ~]ot 20, and the lower contacts 14b ezch have a lower contact area 40b that also extends into the board slot. The upper contact areas 40a are all spaced above the lower contact zreas 40b.
_ _ 3'~
As is ill vstrated by Figs. 2 and 3 the contacts are also arranged so that the upper contacts 14a ~nd lower contacts 14b are e2ch located directly across from each other 210ng the board ~lot 20. Th~s, the contacts in one row 172 are arranged in a upper-lower-upper-lower p2ttern, and the contacts in the opposite row 17b are arranged in 2 lower-upper-lower upper pattern.
Peferring still to Fig. 3 it can be seen that each contact 14 abl~ts one side of a solid center core 24 that is integral with the base section 16. Each contact 14a, 14b incl~des ~ st2bilizer pl2te, 26a and 26b respectively, that h~s a bullet-nosed root section, 282 ~nd 28b respectively, that is directed toward~ the opposite contect 14b or 14a. The root section is positioned within a slotted root nesting 2re2, 302 and 30b respectively, in the center core 24 so as to seci~re the contact 14 within the ins~ tor body 12. ~ surface press~re contact be2m, 322 and 32b respectively, extends downward from each ~tabilizer plate 262, 26b distal from the root section 28a, 28b, curves under the insulator body center core, and termin2tes adj2cent to the lonsitudinal center line of the insulator body. A
sur face pressure contact 34a and 34b respesctively, is located at the end of each low be2m for electric~lly connecting the contact to a contact p2d on an adj~cent mother board (not shown).
~2~X~3~
The contacts 14a, 14b each have a daughter board contact beam, 36a and 36b respectively, that extends upward from an intermediate location on the stabilizer plate 26a, 26b. Each daughter board contact bea~ 36a, 36b includes a stem, 382 and 38b respectively, that extends upward towards the board slot 20 from which the contact are~ 402 or 40b projects into the board slot 20.
A restraining finger, 42~ and 42b respectively, extends from e~ch contact are? 40a, 40b and is located in the contact clot 21. The restraining fingers e~ch abut pre]oad barriers 44 that are integral with the insulator body 12 and extend across the top of the contact slot 21 adjacent to the board ~lot 20.
The stabilizing plates 26a and 26b and complementary root nesting areas 30a and 30b ~re alco offset from each other. Th~s, the stabilizing plate 26a of the ~pper contact 14a and associated root nesting area 30a are located above the stabilizing plate 26b of lower contact 14b and ascociated root nesting area 30b.
As illustr2ted in Fig. 4 the contacts ~4 m~y be profiled out of a section of flat stock 46. After the contacts are profiled they can be excised from the flat stock for insertion into the insulator body 12.
Fig~ 6 illustr2tes a plurality of longitudin~lly aligned edge connector modules 10 inside an edge connector hovsing 48. The housing is composed of plastic ~LX!3~
1~
and formed from two elongzted side walls 49 separated by end walls 50. The modvles 10 are each located in a seating space 51 between the sidewalls. ~ach seating sp~ce is defined by the sidewalls and by either the end walls 50 or cross barF 52 that extend between the sidewalls 49. ~op side walls 53 extend across the housing 48 adjacent to the lower portion of t~e body stem sections 1~.
Lips 5~ protrude from the top of the body stem sections 18 over the top surface of the top side walls 53. The lips secures the the modvle~ 10 in the connector housing 4~. The outer svrfaces of the lips 56 ~re bevelled so the mcdules can be inserted into the connector housing.
The edge connector hovsing 48 with modvles 10 attached is used by first installing the assembled vnit on a mother board. The alignment pin 23 of the individual modules are positiored in separate bores (not shown) in the mother board so the edge connector svrface pressvre contects 34 will abvt the appropriate mother board contact pads. Since each module 10 has its own alignment pin 23, all of the contact surface pressvre contacts areas 34 will be properly aligned, regardless of the number of mod~les there are.
A davghter board is covpled to the edge connector by inserting its edge section into the board slot 20 between ~ll2~ 3 the stems 18 of the insvl~tor bodies 12. As shown in Fig.
5 a daughter board 90 used with the edge connector of this invention is provided with two rows of contact pads 92a, 92b that are offset from each other. The lower contact pads 92b are each under the gap that separ~tes the upper contact peds 92a.
The d~ughter board 90 c2n be provided with offset rows of contact padc 92a end 92b since the contact areas 40a and 40b of the adj~cent edge connector contacts 14 that they are designed to be in registration with are simil~r]y offset. In other words, the upper contact areas 40a will ab~t the upper contact p~dc 92e end the lower contact areeC 40b will ab~t the lower contact pads 90b. ~hus, this edge connector makes it possible to do~ble the number of contact padc aveileble per unit ~ength of the davghter board without decreasing the cross-section~l width of the contact pads or the spacing between them or the tolernce reouired to insure contact between the contact areas 40 and the contact p~ds 92.
~ nother edvanteqe of this edge connector is that the stabilizer plete 26 does not transmit the forced deflectionel movment of the da~ghter board contact be2ms 36 to the curface pressvre contact beem~ 32. This is because the stabilizer plete is firm]y secvred in the body center core 24 by the root section 28. ~hv9, when 2 de~ghter bo2rd is inserted or removed from the edge ~LZ~ 3~
connector, the motion of the forced deflection of the daughter board contact beam is blocked by the stabilizer pl~te. The surface pressure contact beam 32 does not move and the svrface pressure contact 34 ~ctays in electrical contact with the mother board contact pad it is in registration with.
Moreover the d~ughter contact beams 36 c~n be tapered since they are profiled from flat stock 4~. The tapered structure produces a contact which is less prone to lose its resilantcy and flexibility. ~his signific~ntly incre~ses the useful lifetime of the contacts 14.
The preloPd barriers 44 alco contribute to the utility of this edge connector. The prelo~d barriers block the inward movement of the daughter board contact beams 36 tow~rds the board clot 20. This reduces the stress the d~ughter board contacts exert on the insul~tor module so as to prevent it from becoming cracked over time. The prelo~d bPrrierc ~]so limit the amount of disp~cement forced by the daughter boPrd~ 90 on the contacts 14 by pre-stressing them. Moreover, the prelo~d barriers 44 limit the degree of laterial deform~tion individual d~ughter board contact beams 36 are subject to. This minimizes the need for contact pads 92 with wide cross-sectionàl widths to insure contact with the beam cont~cts 40. This also substantially ~Z8;~3;~
eliminates the po~sibility that an indvidual daughter board contact bea~ 36 will become bent out of shape and not register with the approriate daughter board contact pad 92.
Furthermore, it is relatively simple to change the normal force the contacts 14 exert on a da~ghter board 90. This is because the normzl force exerted by the contacts is a function of the depth of their insertion relative to the board slot 20. For example, an edge connector designed to provide minimal normal force would have cont~cts seated away from the board slot 20. An edge connector designed to have maximum normal force, on the other hand would have contacts seated clos~; to the board slot. Plso, it is relatively easy to load the contacts into the contact slots 21 through the inside openings 22 in the insvlator body 12. ~hi~ reduces the cost of manufacturing the edge connector.
knother advantages of this edge connector is that the contact surface pressure contacts 34 reuire only contact pads on the adjacent mother board. ~here is no need to provide plated through holes or to perm~nently connect the contacts to the mother board. ~hus, there is no need to design lerge portion~ of the mother board's circuitry around areas dedicated to the edge connector contacts. Al~o the surface pre~sure mounting makes it ~82~3'~
, 16 relatively simple to repair or repl~ce the edge connector modules.
Alternative combinationc of contacts are possible with the edge connec~or of this i~vention. P5 illustrated in Fig. 7 a module 62 can be provided with both signal contacts 14 and power contacts 6~. The power contacts have a crocs-_ectional ~re~ of approximately .75 milc2 instead of the ~28 ~ilE2 cross-sectional width of the signal contact. The mod~le is provided with power contact slots 66 of incre~sed width to 2ccommodate the power cont2cts. ~he power contacts are ælco offset from each other so one contact 64a has an upper contact area and the opposite contact 64b has a lower contact area (contact areas not shown).
This embodiment of the invention mekes it possible to s~pply a da~ghter bo~rd with both sign~l ~nd power contacts from a single edge connector. It eliminates the need to have to supply the daughter board with power through sep~rate low-recistance wires.
Furthermore in some embodiments of the invention it mey be necess~ry to provide the edge connector housing 48 with cl~mping mechanisms (not illustrated) to secure a portion of the daughter board 90. This mey be reauired when the daughter board is inserted horizont~lly into the edge connector or in other other situations where the 3~
cont~cts 14 alone do not have sufficent strength to hold the daughter board.
Th~s it is understood that the following claims are intended to cover all the generic and specific featvres of the invention herein described.
What is claimed as new and desired to be sec~red by Letters Patent of the Vnited ctates is:
, Field of the Invention -This invention relates to electro-mechanic~l connectors for circuit boards, and more particularly to edge connector~ that mechanically secure and electrically connect the edge portions of circuit boards.
Background of the Invention Electrical connectors are designed to provide conductive paths between adjacent printed circuit boards.
Some connectors also mechenically seize the board~ to which they are connected so as to physicelly secure one boerd to the edjecent boerd. Connectors of this type are often instelled on e prim2ry, or "mother~ bo3rd, and are adepted to receive the edges of secondery, or "deughter"
boards. These connectors are celled edge connectorC and ere used in modern electricel e~uipment that contain~ e number of pare]lel daughter boerds that ere closely pecked together.
Edge connectors often comprise a number of conductive contects that are spaced apert and erranged linearly in a housing. Each contact is metellic, and is ~ositioned to abut a conductive contact pad on the edge of the daughter board. Often the contects are arranged in two parallel rows so the daughter board can be inserted therebetween. When a daughter board is positioned between the rows, the contacts exert a 3~ ~ 3 gripping force on the dzughter board so as to secure it in the housing.
There are a number of disadvzntagec to the edge connectors currently in use. The conductors of most of these connectors have vertical stems that must be solder-connected to plated through holes in the mother board.
Providing the mother board with a large number of plated through holes consumes 2 significant are2 on the bo~rd and reauires that conductors ?nd other circuit components on the board be designed around them. ~oreover, it is difficult to change the edge connector~ on a board since they are semi-permznently attached to the board.
In 2ddition, the mechanism many edge connector~ use to secure the daughter boards is inefficient. ~ome edge connectors rely on Zero Incertion Force, (ZIF) mechanisms. The contacts of these connectors are in registration with a czm rod so that at le~st one of the parallel rows of contact connectors can be selectively moved towards or away from the oppocite row. Initially, the contacts are spzced ap~rt from each other. After the daughter board is inserted between the opposed rows of contacts, the rows are moved together so as to arip the daughter board therebetween. ZIF connectors rely on relatively expensive mechanic21 mechanisms to secure the daughter boards. Furthermore, the securing mechanism is ~X8~32 formed of a number of moveable parts r any of which m?y malfunction because of either wear or breakzge.
Other edge connectors rely on Low Insertion Force, (LIF) contacts. These contacts are pieces that h~ve been stamped and bent to have a shape with spring-]ike resiliant characteristics. Fventually though, the contacts lose their resiliency and are deformed into a permanently open sha~e. ~hen 2 daughter board is placed between the worn contacts they do not firm]y abut the daughter board. As a result, they no longer secure the d2ughter board to the housing, nor do they make a reliab]e electric~l connection with the daughter bo~rd's contact pads.
Moreover, only a limited number of electric?l connections can be made per unit length of the d~ughter board. This is because the individual contact padc on the daughter bo?rd h?ve to h?ve a minimum width to insure that there is ? sufficient are~ of contact between them and the connector contacts-to form-a-cont-inuous electric?l path with minim~l re~istance. Also, the contact padc must be spaced apart a sufficient distance so that under normal operation conditions adjacent padc will not short circuit. Current contact p?ds have a cross-sectional width of 80 mils (0.080") and ?re sp?ced apart approximately 20 mils. ~hus, each contact pad and insul?ting 9?p occupies 100 ~ils of length, so a m?ximum . . . _ . _ ~2~ Z ~3~
of 10 contacts per inch of daughter bo~rd c~n be accommodated. The increasing miniaturization of electronic circuits requires that more connections per ~nit length of board be made ~vailable.
Furthermore, some edge connectors provide only signal contacts to the daughter bo2rd. They are not suited to transfer the Fower needed to oper2te components that may be located on the daughter boards.
Summary of the Invention A principle object of thi~ invention therefore is to provide an edge connector with contacts that do not h~ve to be permanently or semi-perm2nently attached to the mother board. Th~s, mounti~? of this connector on the mother bo~rd does not reouire the extensive relocetion of other components and conductors around it. A further object of this invention is to provide a connector with contacts that are able to sec~re the da~ghter board.
Furthermole, the contacts are able to withstand the stress of repeated insertion and removal of daughter boards without becoming worn. Moreover, the contacts are arranged to provide a larqe number of electrical connections per unit length along the d2ughter bo~rds.
Still another object of this invention is to provide an edge connector able to tran~fer both signal and power currents to and from the dcughter board.
These and other objects of this invention are provided by an edge connector comprising a insulator module containing two parellel rows of spaced-?part, flexible contacts. Fach cont?ct is p~ired with a contact loc?ted directly across from it. A board slot i5 defined by a space in the module between the rows of contacts.
Each contact includes ? contact area that extends into the board slot space. The cont?cts are arranged so that in each row, the contact areas of adjacent contacts are longitudinally offset from each other. ~ore specific?lly, for each pair of adj?cent contacts one has a upper contect area, and the other a lower contact area, wherein the upper contact are? is spaced above the lower contact ?rea. ~he contects are ?lso arranged ~o th?t a contact with an upper contact ?ree is loc?ted directly across from e cont?ct with ? lower contact ?rea. ~hus, one row of contacts includes contect areas arrenged in ?
upper-lower-upper-lower pattern, and the opposite row includes contact areas arranged in a lower-upper-lower-upper pattern. Each cont?ct is urged away from the bo?rd slot by a pre-102d barrier, integral with the module, th?t is loc?ted ebove the contact.
The edge connector module c?n be supplied with both thin-profile signal contacts and wide-profile power contects. The signal contacts are formed from blanking out of flat stock. ~oth types of contacts ~re provided ~LZ8~L3 with ~urface pressure cont~cts that abut contact pad~ on the mother board the edge connector is attached to.
The edge connector is used by first mounting it on the mother board. The surface pressure contæcts impinge on mother board contact pads so as to form an electric71 path therebetween. ~ daughter board is then f~stened to the edge connector by inserting its edge into the board slot. The resilient properties of the contact~ cause their contact are~s to prec~ ag~inst the d2ughter board.
~he daughter board is thus secured between the two rows of contacts pressing ag2inst it. Furthermore, the contact area of e2ch cont~ct impinges upon a separate contact pad on the daughter board so ~s to form an electrical path therebetween. ~hvs, each contact serves ~s a conductive link that connects a d~ughter board cont~ct pad to 2 complement~ry contact p~d on the mother bo?rd .
There ~re a number of ~dv~ntages to this edge connector. Since in each row the contact areas of adj2cent contactC are offset, the contact pads on the daughter boards can similarly be offset. Thus, it is possible to provide each side of the d~ughter bo~rd with two rows of contact p~ds. ~his doubles the number of electrical connections av~ilable per unit lenyth of daughter bo~rd w;thout reducing the re~uired tolerences - ~8~3~
between the contact pads or without redvcing the size of the contact pads.
Also, the signal contacts are each relative]y resilient. This is in part because the contact~ ~re profiled out of fl2t stock rather ~han pressed into shape like tradition21 contacts. As a result the contacts ~re not prone to become bent out of shape with the subse~uently loss of resiliency. Furthermore, the pre-]oad barriers insure the contacts exert sufficeint normal force against the daughter board with only a minimal amount of displacement. This insures the long term flexibility of the contacts since they are not stretched out of their normal range of elasticity.
Furthermore, providing the surface pressure contacts eliminates the need to provide plated through holes on the mother board. This simplifies the need to design the mother board circuitry around the edge connector. This also makes it unnecessary to attach the contacts by soldering or other semi-permanent means, m~king it simpler to remove and replace the edge connector.
Also, the cont2cts of this invention are side loaded into the module. This means the normal force exerted by the contacts on the insulator module is a function of the contacts' position relative to the module. Thus, the normal force the contacts exert can be easily adj~sted by inserting the contacts in a different module.
1;3~
Other advantages of this invention will become obvious as a preferred embodiment of the invention is described~
Detailed Dæscription Of The Drawings Figure 1 is a perspective view of the basic edge connector module of this invention.
Figure 2 is a partial top plan view of the basic edge connection module of this invention.
Figvre 3 ic a cross-sectional of the basic edge connector module of this invention taken along line 3-3 in Figvre 2.
Figure 4 is a view of a plur21ity of contacts of this invention blanked from flat stock.
Figure 5 is a cide view of the terminal pads of a daughter board to be used with the edge connector of this invention.
Figure 6 is an exposed side view of an edge connector housing containing a number of edge connector modules.
Figure 7 is a top view of an edge connector of this invention containing both signal and power contacts.
3'2 Detailed_Description Of The Preferred Embodiment Figures 1 and 2 illustrate an edge connector module 10 comprising an insulator body 12 that cont~ins 2 number of contacts 14a and 14b. The insulator body includes z base section 16 with a wide cros~-sectional area and two symmetric, spaced apart stem sections 18 that extend up from the base ?nd are spaced apart to form a board slot 20 therebetween. m e contacts 14 are arranged in two rows 17a, 17b located on opposite sides of the board clot. Each cont~ct is loczted in a contact slot 21 that are arr2nged in symmetric pairs across the bo2rd slot 20.
Fach contact slot is located in one half of th~' bace section 16 and in the adjacent stem section 1~. The contacts are loaded into the slots 21 thro~gh side openings 22 located along the body 12. The insulator body 12 also include~ at lea~t one alignment pin 23, ~Fig. 3,) that projects downwzrd from the base section 16.
The contacts 14 zre zrranged in the rows 17 so that upper contacts 14~ alternate with lower contacts 14b.
The upper contacts 14a each have an upper contact ~rea 40a that extends into the board ~]ot 20, and the lower contacts 14b ezch have a lower contact area 40b that also extends into the board slot. The upper contact areas 40a are all spaced above the lower contact zreas 40b.
_ _ 3'~
As is ill vstrated by Figs. 2 and 3 the contacts are also arranged so that the upper contacts 14a ~nd lower contacts 14b are e2ch located directly across from each other 210ng the board ~lot 20. Th~s, the contacts in one row 172 are arranged in a upper-lower-upper-lower p2ttern, and the contacts in the opposite row 17b are arranged in 2 lower-upper-lower upper pattern.
Peferring still to Fig. 3 it can be seen that each contact 14 abl~ts one side of a solid center core 24 that is integral with the base section 16. Each contact 14a, 14b incl~des ~ st2bilizer pl2te, 26a and 26b respectively, that h~s a bullet-nosed root section, 282 ~nd 28b respectively, that is directed toward~ the opposite contect 14b or 14a. The root section is positioned within a slotted root nesting 2re2, 302 and 30b respectively, in the center core 24 so as to seci~re the contact 14 within the ins~ tor body 12. ~ surface press~re contact be2m, 322 and 32b respectively, extends downward from each ~tabilizer plate 262, 26b distal from the root section 28a, 28b, curves under the insulator body center core, and termin2tes adj2cent to the lonsitudinal center line of the insulator body. A
sur face pressure contact 34a and 34b respesctively, is located at the end of each low be2m for electric~lly connecting the contact to a contact p2d on an adj~cent mother board (not shown).
~2~X~3~
The contacts 14a, 14b each have a daughter board contact beam, 36a and 36b respectively, that extends upward from an intermediate location on the stabilizer plate 26a, 26b. Each daughter board contact bea~ 36a, 36b includes a stem, 382 and 38b respectively, that extends upward towards the board slot 20 from which the contact are~ 402 or 40b projects into the board slot 20.
A restraining finger, 42~ and 42b respectively, extends from e~ch contact are? 40a, 40b and is located in the contact clot 21. The restraining fingers e~ch abut pre]oad barriers 44 that are integral with the insulator body 12 and extend across the top of the contact slot 21 adjacent to the board ~lot 20.
The stabilizing plates 26a and 26b and complementary root nesting areas 30a and 30b ~re alco offset from each other. Th~s, the stabilizing plate 26a of the ~pper contact 14a and associated root nesting area 30a are located above the stabilizing plate 26b of lower contact 14b and ascociated root nesting area 30b.
As illustr2ted in Fig. 4 the contacts ~4 m~y be profiled out of a section of flat stock 46. After the contacts are profiled they can be excised from the flat stock for insertion into the insulator body 12.
Fig~ 6 illustr2tes a plurality of longitudin~lly aligned edge connector modules 10 inside an edge connector hovsing 48. The housing is composed of plastic ~LX!3~
1~
and formed from two elongzted side walls 49 separated by end walls 50. The modvles 10 are each located in a seating space 51 between the sidewalls. ~ach seating sp~ce is defined by the sidewalls and by either the end walls 50 or cross barF 52 that extend between the sidewalls 49. ~op side walls 53 extend across the housing 48 adjacent to the lower portion of t~e body stem sections 1~.
Lips 5~ protrude from the top of the body stem sections 18 over the top surface of the top side walls 53. The lips secures the the modvle~ 10 in the connector housing 4~. The outer svrfaces of the lips 56 ~re bevelled so the mcdules can be inserted into the connector housing.
The edge connector hovsing 48 with modvles 10 attached is used by first installing the assembled vnit on a mother board. The alignment pin 23 of the individual modules are positiored in separate bores (not shown) in the mother board so the edge connector svrface pressvre contects 34 will abvt the appropriate mother board contact pads. Since each module 10 has its own alignment pin 23, all of the contact surface pressvre contacts areas 34 will be properly aligned, regardless of the number of mod~les there are.
A davghter board is covpled to the edge connector by inserting its edge section into the board slot 20 between ~ll2~ 3 the stems 18 of the insvl~tor bodies 12. As shown in Fig.
5 a daughter board 90 used with the edge connector of this invention is provided with two rows of contact pads 92a, 92b that are offset from each other. The lower contact pads 92b are each under the gap that separ~tes the upper contact peds 92a.
The d~ughter board 90 c2n be provided with offset rows of contact padc 92a end 92b since the contact areas 40a and 40b of the adj~cent edge connector contacts 14 that they are designed to be in registration with are simil~r]y offset. In other words, the upper contact areas 40a will ab~t the upper contact p~dc 92e end the lower contact areeC 40b will ab~t the lower contact pads 90b. ~hus, this edge connector makes it possible to do~ble the number of contact padc aveileble per unit ~ength of the davghter board without decreasing the cross-section~l width of the contact pads or the spacing between them or the tolernce reouired to insure contact between the contact areas 40 and the contact p~ds 92.
~ nother edvanteqe of this edge connector is that the stabilizer plete 26 does not transmit the forced deflectionel movment of the da~ghter board contact be2ms 36 to the curface pressvre contact beem~ 32. This is because the stabilizer plete is firm]y secvred in the body center core 24 by the root section 28. ~hv9, when 2 de~ghter bo2rd is inserted or removed from the edge ~LZ~ 3~
connector, the motion of the forced deflection of the daughter board contact beam is blocked by the stabilizer pl~te. The surface pressure contact beam 32 does not move and the svrface pressure contact 34 ~ctays in electrical contact with the mother board contact pad it is in registration with.
Moreover the d~ughter contact beams 36 c~n be tapered since they are profiled from flat stock 4~. The tapered structure produces a contact which is less prone to lose its resilantcy and flexibility. ~his signific~ntly incre~ses the useful lifetime of the contacts 14.
The preloPd barriers 44 alco contribute to the utility of this edge connector. The prelo~d barriers block the inward movement of the daughter board contact beams 36 tow~rds the board clot 20. This reduces the stress the d~ughter board contacts exert on the insul~tor module so as to prevent it from becoming cracked over time. The prelo~d bPrrierc ~]so limit the amount of disp~cement forced by the daughter boPrd~ 90 on the contacts 14 by pre-stressing them. Moreover, the prelo~d barriers 44 limit the degree of laterial deform~tion individual d~ughter board contact beams 36 are subject to. This minimizes the need for contact pads 92 with wide cross-sectionàl widths to insure contact with the beam cont~cts 40. This also substantially ~Z8;~3;~
eliminates the po~sibility that an indvidual daughter board contact bea~ 36 will become bent out of shape and not register with the approriate daughter board contact pad 92.
Furthermore, it is relatively simple to change the normal force the contacts 14 exert on a da~ghter board 90. This is because the normzl force exerted by the contacts is a function of the depth of their insertion relative to the board slot 20. For example, an edge connector designed to provide minimal normal force would have cont~cts seated away from the board slot 20. An edge connector designed to have maximum normal force, on the other hand would have contacts seated clos~; to the board slot. Plso, it is relatively easy to load the contacts into the contact slots 21 through the inside openings 22 in the insvlator body 12. ~hi~ reduces the cost of manufacturing the edge connector.
knother advantages of this edge connector is that the contact surface pressure contacts 34 reuire only contact pads on the adjacent mother board. ~here is no need to provide plated through holes or to perm~nently connect the contacts to the mother board. ~hus, there is no need to design lerge portion~ of the mother board's circuitry around areas dedicated to the edge connector contacts. Al~o the surface pre~sure mounting makes it ~82~3'~
, 16 relatively simple to repair or repl~ce the edge connector modules.
Alternative combinationc of contacts are possible with the edge connec~or of this i~vention. P5 illustrated in Fig. 7 a module 62 can be provided with both signal contacts 14 and power contacts 6~. The power contacts have a crocs-_ectional ~re~ of approximately .75 milc2 instead of the ~28 ~ilE2 cross-sectional width of the signal contact. The mod~le is provided with power contact slots 66 of incre~sed width to 2ccommodate the power cont2cts. ~he power contacts are ælco offset from each other so one contact 64a has an upper contact area and the opposite contact 64b has a lower contact area (contact areas not shown).
This embodiment of the invention mekes it possible to s~pply a da~ghter bo~rd with both sign~l ~nd power contacts from a single edge connector. It eliminates the need to have to supply the daughter board with power through sep~rate low-recistance wires.
Furthermore in some embodiments of the invention it mey be necess~ry to provide the edge connector housing 48 with cl~mping mechanisms (not illustrated) to secure a portion of the daughter board 90. This mey be reauired when the daughter board is inserted horizont~lly into the edge connector or in other other situations where the 3~
cont~cts 14 alone do not have sufficent strength to hold the daughter board.
Th~s it is understood that the following claims are intended to cover all the generic and specific featvres of the invention herein described.
What is claimed as new and desired to be sec~red by Letters Patent of the Vnited ctates is:
Claims (13)
1. An edge connector for mechanically securing and electrically connecting the edge of a circuit board, comprising:
(a) an insulator body having a base, and two parallel, spaced apart, symmetric stem sections extending upwards from the base located around the body center-line so as to form a board slot therebetween, and a plurality of laterally extending contact slots located along the length of the insulator body, each slot extending from one side of the base and through the adjacent stem, each slot located opposite an adjacent slot located across said board slot;
(b) a plurality of contacts, each contact located inside a separate contact slot, so as to form two rows of opposed contacts, each contact including a stabilizer plate secured inside the base of the insulator body, a surface pressure contact beam extending downward from the stabilizer plate with a surface pressure contact at the end of the surface pressure contact beam, a daughter board contact beam that extends upwards from the stabilizer plate into the board slot with a contact area inside the board slot, and a restraining finger above the contact area, and in at least one row, at least one upper contact, with an upper contact area, located adjacent to a lower contact, with a lower contact area, said upper contact area spaced above said lower contact area; and (c) a plurality of pre-load barriers, each pre-load barrier integral with the insulator body and extending across a contact slot adjacent to the daughter board slot so that the contact restraining finger abuts the pre-load barrier.
(a) an insulator body having a base, and two parallel, spaced apart, symmetric stem sections extending upwards from the base located around the body center-line so as to form a board slot therebetween, and a plurality of laterally extending contact slots located along the length of the insulator body, each slot extending from one side of the base and through the adjacent stem, each slot located opposite an adjacent slot located across said board slot;
(b) a plurality of contacts, each contact located inside a separate contact slot, so as to form two rows of opposed contacts, each contact including a stabilizer plate secured inside the base of the insulator body, a surface pressure contact beam extending downward from the stabilizer plate with a surface pressure contact at the end of the surface pressure contact beam, a daughter board contact beam that extends upwards from the stabilizer plate into the board slot with a contact area inside the board slot, and a restraining finger above the contact area, and in at least one row, at least one upper contact, with an upper contact area, located adjacent to a lower contact, with a lower contact area, said upper contact area spaced above said lower contact area; and (c) a plurality of pre-load barriers, each pre-load barrier integral with the insulator body and extending across a contact slot adjacent to the daughter board slot so that the contact restraining finger abuts the pre-load barrier.
2. The edge connector of claim 1 further comprising:
a) a center core within the base of the insulator body between the lateral opposed contacts, the center core incuding clotted root nesting areas adjacent the contact slots; and b) a root section extending from said stabilizer plate of each of said contacts towards the insulator body center-line, and secured in one of said slotted root nesting areas.
a) a center core within the base of the insulator body between the lateral opposed contacts, the center core incuding clotted root nesting areas adjacent the contact slots; and b) a root section extending from said stabilizer plate of each of said contacts towards the insulator body center-line, and secured in one of said slotted root nesting areas.
3. The edge connector of claim 1 wherein the insulator body is provided with at least one alignment pin.
4. The edge connector of claim 1 wherein at least one pair of opposed contacts is profiled from flat stock.
5. The edge connector of claim 1 wherein at least one row contains all upper and lower contacts, and the contacts are arranged so that the upper contacts alternate with the lower contacts.
6. The edge connector of claim 1 wherein both rows contain the upper and lower contacts, and that in each row the contacts are arranged so that in each row the upper contacts alternate with the lower contacts and that along the board slot each upper contact is located opposite a lower contact and each lower contact is located opposite an upper contact
7. The edge connector of claim 6 wherein the stabilizer plate of said upper contacts are located above the stabilizer plate of said lower contacts
8. An edge connector comprising a housing containing at least one edge connector module adapted to receive a portion of a daughter board comprising:
A. a housing with elongated sidewalls spaced apart by end walls, the space between said sidewalls and said end walls defining at least one module seating areas; and B. at least one edge connector module positioned within one of said module seating areas, comprising;
(i) an insulator body having a base, and two parallel, spaced apart, symmetric stem sections extending upwards from the base located around the body center-line so as to form a board slot therebetween, and a plurality of laterally extending contact slots located along the length of the insulator body, each slot extending from one side of the base and through the adjacent stem, each slot located opposite an adjacent slot across the center line of the insulator body;
(ii) a plurality of contacts, each contact located inside a separate contact slot, so as to form two rows of opposed contacts, each contact including a stabilizer plate secured inside the base of the insulator body, a surface pressure contact beam extending downward form the stabilizer plate with a surface pressure contact area at the end of the surface pressure contact beam, a high beam that extends upwards from the stabilizer plate into the board slot with a contact area inside the board slot, and a restraining finger above the contact area, and in at least one row at least one upper contact, with an upper contact area, located adjacent to a lower contact, with a lower contact area, said upper contact area spaced above said lower contact area;
and (iii) a plurality of pre-load barriers, each pre-load barrier integral with the insulator body and extending across a contact slot adjacent to the daughter board slot so that the contact restraining finger in the contact slot abuts the pre-load barrier.
A. a housing with elongated sidewalls spaced apart by end walls, the space between said sidewalls and said end walls defining at least one module seating areas; and B. at least one edge connector module positioned within one of said module seating areas, comprising;
(i) an insulator body having a base, and two parallel, spaced apart, symmetric stem sections extending upwards from the base located around the body center-line so as to form a board slot therebetween, and a plurality of laterally extending contact slots located along the length of the insulator body, each slot extending from one side of the base and through the adjacent stem, each slot located opposite an adjacent slot across the center line of the insulator body;
(ii) a plurality of contacts, each contact located inside a separate contact slot, so as to form two rows of opposed contacts, each contact including a stabilizer plate secured inside the base of the insulator body, a surface pressure contact beam extending downward form the stabilizer plate with a surface pressure contact area at the end of the surface pressure contact beam, a high beam that extends upwards from the stabilizer plate into the board slot with a contact area inside the board slot, and a restraining finger above the contact area, and in at least one row at least one upper contact, with an upper contact area, located adjacent to a lower contact, with a lower contact area, said upper contact area spaced above said lower contact area;
and (iii) a plurality of pre-load barriers, each pre-load barrier integral with the insulator body and extending across a contact slot adjacent to the daughter board slot so that the contact restraining finger in the contact slot abuts the pre-load barrier.
9. The edge connector of claim 8 wherein said housing contains a plurality of longitudinally aligned module seating areas, at least two module seating areas separated by a cross bar extending between said sidewalls.
10. The edge connector of claim 8 wherein at least one pair of opposed contacts is profiled out of flat stock.
11. The edge connector of claim 8 wherein at least one row contains all upper and lower contacts, and the contacts are arranged so that the upper contacts alternate with the lower contacts.
12. The edge connector of claim 8 wherein both rows contain the upper and lower contacts, and that in each row the contacts are arranged so that in each row the upper contacts alternate with the lower contacts and that along the board slot each upper contact is located opposite a lower contact and each lower contact is located opposite an upper contact
13. The edge connector of claim 12 wherein the stabilizer plate of said upper contacts are located above the stabilizer plate of said lower contacts
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US026,735 | 1987-03-17 | ||
| US07/026,735 US4780095A (en) | 1987-03-17 | 1987-03-17 | Edge connector for circuit boards |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1282132C true CA1282132C (en) | 1991-03-26 |
Family
ID=21833496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000561575A Expired - Fee Related CA1282132C (en) | 1987-03-17 | 1988-03-16 | Edge connector for circuit boards |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US4780095A (en) |
| EP (1) | EP0349595B1 (en) |
| JP (1) | JP2648841B2 (en) |
| AT (1) | ATE113762T1 (en) |
| AU (1) | AU604909B2 (en) |
| CA (1) | CA1282132C (en) |
| DE (1) | DE3852028T2 (en) |
| WO (1) | WO1988007271A1 (en) |
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| US5139785A (en) * | 1988-03-26 | 1992-08-18 | Hoechst Aktiengesellschaft | Pesticides |
| US4915636A (en) * | 1988-07-25 | 1990-04-10 | Dynatech Labs, Inc. | Card guide with electrical contacts |
| GB2237153A (en) * | 1989-10-19 | 1991-04-24 | Itt Ind Ltd | Electrical connector |
| US5162002A (en) * | 1990-03-30 | 1992-11-10 | Molex Incorporated | Card edge connector assembly |
| JPH069152B2 (en) * | 1991-06-18 | 1994-02-02 | モレックス インコーポレーテッド | Card edge connector for horizontal board connection and its manufacturing method |
| US5163847A (en) * | 1991-08-05 | 1992-11-17 | Molex Incorporated | Card edge connector assembly |
| SG43825A1 (en) * | 1991-08-05 | 1997-11-14 | Molex Inc | Card edge connector assembly |
| JP2536074Y2 (en) * | 1991-10-22 | 1997-05-21 | ヒロセ電機株式会社 | Module structure of electrical connector |
| US5234353A (en) * | 1992-03-03 | 1993-08-10 | Amp Incorporated | Hybrid input/output connector having low mating force and high cycle life and contacts therefor |
| DE19511507A1 (en) * | 1995-03-29 | 1996-10-02 | Siemens Ag | Electrical connector |
| GB9525266D0 (en) * | 1995-12-11 | 1996-02-07 | Amp Great Britain | Printed circuit board edge card connector |
| GB9605674D0 (en) * | 1996-03-18 | 1996-05-22 | Amp Great Britain | Cam-in edge-card connector |
| AT406725B (en) * | 1998-02-24 | 2000-08-25 | Siemens Ag Oesterreich | ELECTRONIC DEVICE |
| EP2179848A1 (en) * | 1998-05-18 | 2010-04-28 | Seiko Epson Corporation | Ink-jet printing apparatus and ink cartridge therefor |
| US6394823B1 (en) | 2000-05-26 | 2002-05-28 | Molex Incorporated | Connector with terminals having increased capacitance |
| US6406332B1 (en) | 2000-10-17 | 2002-06-18 | Dell Products, L.P. | Translating lockable card edge to card edge connector |
| TW523199U (en) * | 2000-12-21 | 2003-03-01 | Hon Hai Prec Ind Co Ltd | Electronic card connector |
| EP1372418A4 (en) * | 2001-02-26 | 2006-01-25 | Univ | Non-oligomerizing tandem fluorescent proteins |
| JP3748787B2 (en) * | 2001-04-27 | 2006-02-22 | Ｓｍｋ株式会社 | Movable connector |
| US6439930B1 (en) * | 2001-11-05 | 2002-08-27 | Hon Hai Precision Ind. Co., Ltd. | Electrical connector configured by wafers including moveable contacts |
| US6620002B1 (en) | 2002-07-03 | 2003-09-16 | Hon Hai Precision Ind. Co., Ltd. | Contact strip for electrical connector |
| US7044773B2 (en) | 2002-08-01 | 2006-05-16 | Ddk Ltd. | Connector |
| DE10256002B4 (en) * | 2002-11-30 | 2005-07-14 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Apparatus and method for electrically contacting a printed circuit board |
| US7275966B2 (en) * | 2002-12-20 | 2007-10-02 | Molex Incorporated | Connector with heat dissipating features |
| CN2665961Y (en) * | 2003-09-06 | 2004-12-22 | 富士康(昆山)电脑接插件有限公司 | Electric connector |
| CN101015092B (en) * | 2004-07-07 | 2011-01-26 | 莫莱克斯公司 | Edge card connector assembly with high-speed terminals |
| US7108520B1 (en) | 2005-05-06 | 2006-09-19 | Molex Incorporated | Board mounted electrical connector |
| US7442089B2 (en) * | 2005-07-07 | 2008-10-28 | Molex Incorporated | Edge card connector assembly with high-speed terminals |
| WO2007021299A1 (en) * | 2005-08-15 | 2007-02-22 | Molex Incorporated | Vertical edge card connector assembly with high-speed terminals |
| WO2009040612A1 (en) * | 2007-09-27 | 2009-04-02 | Fci | Connector with removable covers |
| JP2009289627A (en) * | 2008-05-30 | 2009-12-10 | D D K Ltd | Connector |
| US7892025B2 (en) * | 2008-07-18 | 2011-02-22 | Tyco Electronics Corporation | Sealed connector assembly |
| US7883344B1 (en) * | 2008-09-26 | 2011-02-08 | Emc Corporation | Electrical connector |
| CN201887188U (en) * | 2010-06-08 | 2011-06-29 | 富士康(昆山)电脑接插件有限公司 | Edge connector |
| US8517775B1 (en) * | 2012-02-13 | 2013-08-27 | Cheng Uei Precision Industry Co., Ltd. | Electrical connector |
| US8684757B2 (en) * | 2012-04-27 | 2014-04-01 | International Business Machines Corporation | Memory module connector with air deflection system |
| CN103515758B (en) * | 2012-06-21 | 2016-03-09 | 凡甲电子(苏州)有限公司 | Socket connector |
| US20140187058A1 (en) * | 2012-12-27 | 2014-07-03 | Hongfei Yan | Modular Multiple Piece Socket For Enhanced Thermal Management |
| WO2020010245A1 (en) | 2018-07-06 | 2020-01-09 | Samtec, Inc. | Connector with top- and bottom-stitched contacts |
| USD877088S1 (en) | 2018-07-06 | 2020-03-03 | Samtec, Inc. | Contact |
| USD881134S1 (en) | 2018-07-06 | 2020-04-14 | Samtec, Inc. | Contact |
| JP7393980B2 (en) * | 2020-03-05 | 2023-12-07 | ヒロセ電機株式会社 | Electrical connectors for circuit boards and electrical connectors with circuit boards |
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|---|---|---|---|---|
| US3475657A (en) * | 1967-01-03 | 1969-10-28 | Litton Systems Inc | Mounting of electronic components on baseboard or panel |
| US4262981A (en) * | 1979-06-28 | 1981-04-21 | International Telephone And Telegraph Corporation | Printed circuit board connector |
| BE880356A (en) * | 1979-11-30 | 1980-05-30 | Burndy Corp | ELECTRICAL CONNECTOR CONNECTIONS WITH SWITCHABLE PRESSURE PULL OUT OF THE CONTACTS |
| US4439000A (en) * | 1982-03-31 | 1984-03-27 | Amp Incorporated | Surface mount/daughter board connector |
| US4586772A (en) * | 1983-06-13 | 1986-05-06 | Amp Incorporated | Improved card edge connector |
| US4556268A (en) * | 1983-11-23 | 1985-12-03 | Burndy Corporation | Circuit board connector system having independent contact segments |
| JPS61500516A (en) * | 1983-11-23 | 1986-03-20 | ノツシエス，ロツコ | Low insertion force connector device for circuit board |
| JPS618982U (en) * | 1984-06-21 | 1986-01-20 | 沖電気工業株式会社 | Board connection mechanism |
| JPS62254378A (en) * | 1986-04-17 | 1987-11-06 | ヒロセ電機株式会社 | Electric connector for connecting circuit board |
-
1987
- 1987-03-17 US US07/026,735 patent/US4780095A/en not_active Expired - Lifetime
-
1988
- 1988-03-15 AT AT88904298T patent/ATE113762T1/en not_active IP Right Cessation
- 1988-03-15 EP EP88904298A patent/EP0349595B1/en not_active Expired - Lifetime
- 1988-03-15 JP JP63504029A patent/JP2648841B2/en not_active Expired - Lifetime
- 1988-03-15 AU AU17169/88A patent/AU604909B2/en not_active Ceased
- 1988-03-15 DE DE3852028T patent/DE3852028T2/en not_active Expired - Fee Related
- 1988-03-15 WO PCT/US1988/000811 patent/WO1988007271A1/en active IP Right Grant
- 1988-03-16 CA CA000561575A patent/CA1282132C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| WO1988007271A1 (en) | 1988-09-22 |
| EP0349595B1 (en) | 1994-11-02 |
| JP2648841B2 (en) | 1997-09-03 |
| JPH02502771A (en) | 1990-08-30 |
| ATE113762T1 (en) | 1994-11-15 |
| EP0349595A1 (en) | 1990-01-10 |
| DE3852028T2 (en) | 1995-05-24 |
| US4780095A (en) | 1988-10-25 |
| DE3852028D1 (en) | 1994-12-08 |
| AU604909B2 (en) | 1991-01-03 |
| AU1716988A (en) | 1988-10-10 |
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