WO1998009352A1 - Ultra low profile board-mounted modular jack - Google Patents

Ultra low profile board-mounted modular jack Download PDF

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Publication number
WO1998009352A1
WO1998009352A1 PCT/US1997/014920 US9714920W WO9809352A1 WO 1998009352 A1 WO1998009352 A1 WO 1998009352A1 US 9714920 W US9714920 W US 9714920W WO 9809352 A1 WO9809352 A1 WO 9809352A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
board
circuit board
sections
mounting
Prior art date
Application number
PCT/US1997/014920
Other languages
French (fr)
Inventor
Joseph R. Steinman
Original Assignee
The Whitaker Corporation
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by The Whitaker Corporation filed Critical The Whitaker Corporation
Priority to GB9904553A priority Critical patent/GB2331411B/en
Priority to JP51178998A priority patent/JP4019156B2/en
Priority to AU41613/97A priority patent/AU4161397A/en
Publication of WO1998009352A1 publication Critical patent/WO1998009352A1/en

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
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • H01R24/60—Contacts spaced along planar side wall transverse to longitudinal axis of engagement
    • H01R24/62—Sliding engagements with one side only, e.g. modular jack coupling devices
    • H01R24/64—Sliding engagements with one side only, e.g. modular jack coupling devices for high frequency, e.g. RJ 45
    • 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
    • H01R12/712—Coupling devices for rigid printing circuits or like structures co-operating with the surface of the printed circuit or with a coupling device exclusively provided on the surface of the printed circuit
    • H01R12/716—Coupling device provided on the PCB
    • 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]

Definitions

  • This relates to the field of electrical connectors and more particularly to circuit board mountable connectors .
  • Modular jack connectors are prevalently in use in the telecommunications industry, matable to modular plug connectors commonly terminated to multi- conductor cable for signal transmission.
  • One example of such a modular jack is disclosed in US Patent No. 4,221,458 in which an insulative housing defines a plug-receiving cavity extending inwardly from a mating face, in which are disposed spring arms of discrete contact members extending at an angle into the cavity from a side wall to be engaged and deflected by corresponding contacts of a plug connector during mating to establish the electrical connections therebetween.
  • the plug connector utilizes an elongate latch arm that extends from the plug mating face rearwardly to define a manually deflectable tab for delatching when desired; the latch arm extends outwardly from the mating face of the jack when the connectors are mated, for the tab to be accessible, and the jack's plug- receiving cavity includes a recess along a side wall forwardly of the complementary latching surface of the jack as a clearance for the latch arm.
  • Modular jacks may be mounted onto a circuit board within an electronic apparatus such as a computer, at an input/output port having a cutout for insertion of the plug connector thereinto to become mated with the modular jack.
  • the modular jack may also include a surrounding shield member for protection against electromagnetic and radiofrequency interference (EMI/RFI) .
  • EMI/RFI electromagnetic and radiofrequency interference
  • the present invention provides a connector mountable onto a circuit board at an edge thereof in a manner such that the top most surface of the connector is a minimized height above the circuit board. A portion of the connector is seated within a recess of the board extending inwardly from an edge of the board.
  • a shield member includes a bottom wall extending continuously across the bottom of the connector, the housing does not provide a continuous bottom wall. Instead, where the connector is a modular jack, the recess defining the clearance for the latch arm of the plug connector to be matable with the receptacle extends through the bottom wall of the housing. Bottom wall sections of the housing that define side walls of the latch arm recess, are disposed in the circuit board recess and include rearwardly facing surfaces that provide the latching surface.
  • the spring arm contact sections extend into the plug receiving cavity from the top wall, with rear sections that extend rearwardly from the housing and include right angles to extend downwardly for receipt into through holes of the circuit board rearwardly of the housing and the circuit board recess; optionally the rear sections could include horizontal end portions for surface mounting, if desired.
  • FIGURES 1 and 2 are isometric views of the jack and circuit board of the present invention as assembled with a frame member, and exploded;
  • FIGURE 3 is an isometric view of the jack of FIGS. 1 and 2 from below and forwardly thereof;
  • FIGURES 4 and 5 are isometric exploded views of the jack of FIGS. 1 to 3 from below forwardly and above rearwardly, respectively;
  • FIGURES 6 and 7 are an elevation cross-section of the jack exploded and assembled, respectively; and
  • FIGURES 8 to 10 are an elevation side, front and bottom view of the jack of FIGS. 1 to 7.
  • a connector such as modular jack connector 10 is mountable onto a circuit board 12 and includes a board mounting face 14 along the bottom thereof associated with the top surface 16 of the circuit board.
  • Connector 10 is mountable along edge 18 of the circuit board and includes a mating face 20 thereat such that the board and connector may be mounted within an electronic apparatus such as a computer, at a panel cutout defining an input/output port of the apparatus.
  • a conductive frame member 22 may be secured along board edge 18 and including a transverse plate section 24 forwardly of mating face 20 for being seated within a larger panel cutout (not shown) and including an opening 26 aligned with the plug-receiving cavity 30 of the jack extending inwardly from mating face 20.
  • Jack 10 includes an insulative housing 32 surrounded by a shield 34, and a plurality of contacts 36 are mounted in the connector having solder tail board- connecting sections 38 depending from board mounting face 14 for insertion into through-holes 40 of circuit board 12 and soldering therewithin.
  • Contacts 36 also include spring arm contact sections 42 extending into plug-receiving cavity 30 to become engaged by and mated with complementary contacts of a plug connector (not shown) .
  • Housing 32 also is shown to include board- mounting legs 44 depending from board mounting face 14 to retain the connector to the board, having resilient legs for mounting within mounting recesses 46 of board 14 and precisely positioning the array of solder tails 38 with respect to through-holes 40 and relieving stress from the solder terminations thereof.
  • Shield 34 includes ground contacts 48 depending from board- mounting face 14 to form ground connections with ground circuits of board 12.
  • the present invention provides an arrangement by which is minimized the overall height H of the jack 10 above top surface 16 of circuit board 12 (FIGS. 1 and 8) .
  • connector 10 includes structure 50 forwardly of solder tails 38 that extends lower than board-mounting face 14, and that circuit board 12 includes a recess 52 extending inwardly from edge 18 shaped to complement and receive the structure 50 thereinto.
  • Structure 50 forms at least part of the bottom of plug-receiving cavity 30, including a channel 54 along which extends the elongate latch arm of a mating plug connector to extend forwardly of plug-receiving cavity 30.
  • the shape and dimensions of the plug-receiving cavity are maintained in compliance with accepted industry standards, specifically "FCC Rules for Registration of Telephone Equipment, Part 68, Subpart F, Connectors", in particular, the height of the plug- receiving cavity inclusive of the latch arm recess, required to be between about 9.65 mm and 9.93 mm.
  • a conventional modular jack is usually more than 13 mm.
  • the top surface of the connector of the present invention is effectively lowered with respect to the top surface of the circuit board, without decreasing the cavity height, to comply with a desire to minimize the height of any connector component above a mezzanine card to no more than 10 mm, as expressed in proposed IEEE P1386/Draft 2.0 of April 4, 1995, "Draft Standard for a Common Mezzanine Card Family: CMC".
  • the plug receiving cavity 30 is in communication with the bottom surface of the housing at the center.
  • Mating face 20 of the housing provides spaced apart embossments 56 defining the entrance to the latch arm channel 54, and also providing rearwardly facing surfaces 60 behind which the latch arm of a mating plug connector will latch.
  • Shield 34 includes a bottom wall 62 that traverses the open bottom of housing 32 between mounting legs 44 thereof.
  • Shield 34 also includes a pair of spring arms 64 extending rearwardly from front face 66 to engage the shield of a mating plug connector, being deflectable outwardly into clearance slots 68 along inside surfaces of housing 32.
  • shield 34 preferably includes grounding tabs 90 at the front face 66 extending outwardly and forwardly to be engageable with a conductive panel such as frame 22 for enhanced EMI/RFI protection.
  • contacts 36 are insertable into back wall 70 of housing 32 through respective passageways 72 angled inwardly and upwardly, until free ends 74 are received into corresponding grooves 76 in the ceiling of plug receiving cavity 30.
  • Upper portions of solder tails 38 are disposed in respective slots 78 in locating plate 80 to be positioned properly for insertion into through-holes 40 of circuit board 12 (FIG. 2 ) .
  • Such insertion method simplifies automated assembly and also enables the overall length of the contacts to be minimized increasing the speed of signal transmission.
  • the contacts preferably have retention barbs (not shown) along body sections thereof within passageways 72, as is conventional, and their vertical sections may also be sufficiently wide in grooves 78 to establish a force fit therewithin to best assure precise positioning and alignment with circuit board through holes.
  • the contacts may conclude in horizontal solder tails for surface mounting to the circuit board, as is conventional.
  • Shield 34 includes a back wall 82 enclosing and protecting otherwise exposed portions of contacts 36 above locating plate 80 and rearwardly of rear housing wall 70.
  • the present invention may also be used with connectors other than modular jacks, and may be used with plug style connectors as well, where minimized height is desired.

Abstract

A modular jack (10) mountable to a circuit board (12), with a bottom section (50) of a housing (32) forwardly of solder tails (38) of contacts (36) thereof, being disposed within a recess (52) in the circuit board, whereby the height of the top surface of the jack above the circuit board is minimized without reducing the size of the plug-receiving cavity (30) of the jack.

Description

ULTRA LOW PROFILE BOARD-MOUNTED MODULAR JACK
This relates to the field of electrical connectors and more particularly to circuit board mountable connectors .
Modular jack connectors are prevalently in use in the telecommunications industry, matable to modular plug connectors commonly terminated to multi- conductor cable for signal transmission. One example of such a modular jack is disclosed in US Patent No. 4,221,458 in which an insulative housing defines a plug-receiving cavity extending inwardly from a mating face, in which are disposed spring arms of discrete contact members extending at an angle into the cavity from a side wall to be engaged and deflected by corresponding contacts of a plug connector during mating to establish the electrical connections therebetween. The plug connector utilizes an elongate latch arm that extends from the plug mating face rearwardly to define a manually deflectable tab for delatching when desired; the latch arm extends outwardly from the mating face of the jack when the connectors are mated, for the tab to be accessible, and the jack's plug- receiving cavity includes a recess along a side wall forwardly of the complementary latching surface of the jack as a clearance for the latch arm.
Modular jacks may be mounted onto a circuit board within an electronic apparatus such as a computer, at an input/output port having a cutout for insertion of the plug connector thereinto to become mated with the modular jack. The modular jack may also include a surrounding shield member for protection against electromagnetic and radiofrequency interference (EMI/RFI) . It is desired to provide a receptacle or jack connector that defines a low profile extending above the circuit board on which it is mounted. The present invention provides a connector mountable onto a circuit board at an edge thereof in a manner such that the top most surface of the connector is a minimized height above the circuit board. A portion of the connector is seated within a recess of the board extending inwardly from an edge of the board. While a shield member includes a bottom wall extending continuously across the bottom of the connector, the housing does not provide a continuous bottom wall. Instead, where the connector is a modular jack, the recess defining the clearance for the latch arm of the plug connector to be matable with the receptacle extends through the bottom wall of the housing. Bottom wall sections of the housing that define side walls of the latch arm recess, are disposed in the circuit board recess and include rearwardly facing surfaces that provide the latching surface.
The spring arm contact sections extend into the plug receiving cavity from the top wall, with rear sections that extend rearwardly from the housing and include right angles to extend downwardly for receipt into through holes of the circuit board rearwardly of the housing and the circuit board recess; optionally the rear sections could include horizontal end portions for surface mounting, if desired.
An embodiment of the invention will now be described by way of example with reference to the accompanying drawings. FIGURES 1 and 2 are isometric views of the jack and circuit board of the present invention as assembled with a frame member, and exploded;
FIGURE 3 is an isometric view of the jack of FIGS. 1 and 2 from below and forwardly thereof;
FIGURES 4 and 5 are isometric exploded views of the jack of FIGS. 1 to 3 from below forwardly and above rearwardly, respectively; FIGURES 6 and 7 are an elevation cross-section of the jack exploded and assembled, respectively; and
FIGURES 8 to 10 are an elevation side, front and bottom view of the jack of FIGS. 1 to 7. Referring first to FIGS. 1 to 3, a connector such as modular jack connector 10 is mountable onto a circuit board 12 and includes a board mounting face 14 along the bottom thereof associated with the top surface 16 of the circuit board. Connector 10 is mountable along edge 18 of the circuit board and includes a mating face 20 thereat such that the board and connector may be mounted within an electronic apparatus such as a computer, at a panel cutout defining an input/output port of the apparatus. If desired, a conductive frame member 22 may be secured along board edge 18 and including a transverse plate section 24 forwardly of mating face 20 for being seated within a larger panel cutout (not shown) and including an opening 26 aligned with the plug-receiving cavity 30 of the jack extending inwardly from mating face 20.
Jack 10 includes an insulative housing 32 surrounded by a shield 34, and a plurality of contacts 36 are mounted in the connector having solder tail board- connecting sections 38 depending from board mounting face 14 for insertion into through-holes 40 of circuit board 12 and soldering therewithin. Contacts 36 also include spring arm contact sections 42 extending into plug-receiving cavity 30 to become engaged by and mated with complementary contacts of a plug connector (not shown) . Housing 32 also is shown to include board- mounting legs 44 depending from board mounting face 14 to retain the connector to the board, having resilient legs for mounting within mounting recesses 46 of board 14 and precisely positioning the array of solder tails 38 with respect to through-holes 40 and relieving stress from the solder terminations thereof. Shield 34 includes ground contacts 48 depending from board- mounting face 14 to form ground connections with ground circuits of board 12.
The present invention provides an arrangement by which is minimized the overall height H of the jack 10 above top surface 16 of circuit board 12 (FIGS. 1 and 8) . It can be seen in FIGS. 2 and 3 that connector 10 includes structure 50 forwardly of solder tails 38 that extends lower than board-mounting face 14, and that circuit board 12 includes a recess 52 extending inwardly from edge 18 shaped to complement and receive the structure 50 thereinto. Structure 50 forms at least part of the bottom of plug-receiving cavity 30, including a channel 54 along which extends the elongate latch arm of a mating plug connector to extend forwardly of plug-receiving cavity 30.
Thus the shape and dimensions of the plug-receiving cavity are maintained in compliance with accepted industry standards, specifically "FCC Rules for Registration of Telephone Equipment, Part 68, Subpart F, Connectors", in particular, the height of the plug- receiving cavity inclusive of the latch arm recess, required to be between about 9.65 mm and 9.93 mm. To accommodate such cavity height, a conventional modular jack is usually more than 13 mm. However, the top surface of the connector of the present invention is effectively lowered with respect to the top surface of the circuit board, without decreasing the cavity height, to comply with a desire to minimize the height of any connector component above a mezzanine card to no more than 10 mm, as expressed in proposed IEEE P1386/Draft 2.0 of April 4, 1995, "Draft Standard for a Common Mezzanine Card Family: CMC".
Referring now to FIGS. 4 to 7, it is seen that the plug receiving cavity 30 is in communication with the bottom surface of the housing at the center. Mating face 20 of the housing provides spaced apart embossments 56 defining the entrance to the latch arm channel 54, and also providing rearwardly facing surfaces 60 behind which the latch arm of a mating plug connector will latch. Shield 34 includes a bottom wall 62 that traverses the open bottom of housing 32 between mounting legs 44 thereof. Shield 34 also includes a pair of spring arms 64 extending rearwardly from front face 66 to engage the shield of a mating plug connector, being deflectable outwardly into clearance slots 68 along inside surfaces of housing 32. Further, shield 34 preferably includes grounding tabs 90 at the front face 66 extending outwardly and forwardly to be engageable with a conductive panel such as frame 22 for enhanced EMI/RFI protection.
As seen in FIGS. 4 to 7, contacts 36 are insertable into back wall 70 of housing 32 through respective passageways 72 angled inwardly and upwardly, until free ends 74 are received into corresponding grooves 76 in the ceiling of plug receiving cavity 30. Upper portions of solder tails 38 are disposed in respective slots 78 in locating plate 80 to be positioned properly for insertion into through-holes 40 of circuit board 12 (FIG. 2 ) . Such insertion method simplifies automated assembly and also enables the overall length of the contacts to be minimized increasing the speed of signal transmission. For retention, the contacts preferably have retention barbs (not shown) along body sections thereof within passageways 72, as is conventional, and their vertical sections may also be sufficiently wide in grooves 78 to establish a force fit therewithin to best assure precise positioning and alignment with circuit board through holes. Optionally, the contacts may conclude in horizontal solder tails for surface mounting to the circuit board, as is conventional. Shield 34 includes a back wall 82 enclosing and protecting otherwise exposed portions of contacts 36 above locating plate 80 and rearwardly of rear housing wall 70. The present invention may also be used with connectors other than modular jacks, and may be used with plug style connectors as well, where minimized height is desired.

Claims

WHAT IS CLAIMED IS;
1. An arrangement of a modular jack (10) and a circuit board (12) , wherein the modular jack includes an insulative housing (32) having board-mounting sections (44) and a plurality of contact members (36) retained therein and having board-connecting sections extending from the housing, and the circuit board has a top surface (16) and an edge (18) and a plurality of conductive sites (40) corresponding to respective boar - connecting sections (38) of the contact members (36) , and further has mounting apertures (46) cooperable with the boar -mounting sections (44) of the housing (32) , the board-mounting sections of the housing and the board- connecting sections (38) of the contact members (36) depending below a boar -mounting face (14) of the housing (32) abuttable against the top surface of the circuit board, and the modular jack (10) defining a plug- receiving cavity (30) extending inwardly from a mating face (20) , and the contact members (36) including respective contact sections (42) extending into the plug-receiving cavity to be engaged by corresponding contacts of a mating plug connector received into the plug-receiving cavity (30) , and the modular jack (10) further including a bottom section (50) defining at least a latch arm channel (54) adjoining said plug- receiving cavity (30) and extending rearwardly from the mating face (20) at least to rearwardly facing latch surfaces (60); characterized in that: said bottom section (50) of said housing (32) extends below said board-mounting face (14) thereof forwardly of said board- connection sections (38) of said contact members (36) , and said circuit board (12) defines a recess (52) extending inwardly from said edge (18) complementary to said bottom section (50) of said housing (32) , to receive thereinto at least said bottom section of said housing, whereby the height of a top surface of said modular jack (10) above said top surface (16) of said circuit board (12) is minimized.
2. The arrangement as set forth in claim 1 wherein said mounting apertures (46) of said circuit board (12) are in communication with said recess (52) .
3. The arrangement as set forth in claim 1 wherein said plug-receiving cavity (30) is in communication with a bottom surface of said bottom section (50) of said housing (32) . . The arrangement as set forth in claim 3 wherein said modular jack (10) includes a shield (34) surrounding said housing (32), said shield including a bottom wall (62) traversing an outer surface of said bottom section of said housing (32) and extending rearwardly from a front face (66) of said shield.
5. An arrangement of a connector (10) and a circuit board (12) , wherein the connector includes an insulative housing (32) having board-mounting sections (44) and a plurality of contact members (36) retained therein and having board- connecting sections (38) extending from the housing (32) , and the circuit board (12) has a top surface (16) and an edge (18) and a plurality of conductive sites (40) corresponding to respective board- connecting sections (38) of the contact members (36) , and further has mounting apertures (46) cooperable with the board-mounting sections (44) of the housing, the boar -mounting sections of the housing and the board- connecting sections (38) of the contact members depending below a board-mounting face (14) of the housing (32) abuttable against the top surface (16) of the circuit board (12) ; the connector defining a mating face (20) , and the contact members (36) including respective contact sections (42) exposed along the mating face (20) to be engaged by corresponding contacts of a mating connector, and the connector further including a bottom section (50) adjoining the mating face; characterized in that: said bottom section (50) of said housing (32) extends below said boar -moun ing face (14) thereof forwardly of said board-connection sections (38) of said contact members (36) , and said circuit board (12) defines a recess (52) extending inwardly from said edge (18) complementary to said bottom section (50) of said housing (32) , to receive thereinto at least said bottom section of said housing, whereby the height of a top surface of said connector (10) above said top surface (16) of said circuit board (12) is minimized.
PCT/US1997/014920 1996-08-30 1997-08-25 Ultra low profile board-mounted modular jack WO1998009352A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB9904553A GB2331411B (en) 1996-08-30 1997-08-25 Ultra low profile board-mounted modular jack
JP51178998A JP4019156B2 (en) 1996-08-30 1997-08-25 Ultra low profile board mounted modular jack
AU41613/97A AU4161397A (en) 1996-08-30 1997-08-25 Ultra low profile board-mounted modular jack

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/697,798 1996-08-30
US08/697,798 US5702271A (en) 1996-08-30 1996-08-30 Ultra low profile board-mounted modular jack

Publications (1)

Publication Number Publication Date
WO1998009352A1 true WO1998009352A1 (en) 1998-03-05

Family

ID=24802586

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1997/014920 WO1998009352A1 (en) 1996-08-30 1997-08-25 Ultra low profile board-mounted modular jack

Country Status (5)

Country Link
US (1) US5702271A (en)
JP (1) JP4019156B2 (en)
AU (1) AU4161397A (en)
GB (1) GB2331411B (en)
WO (1) WO1998009352A1 (en)

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GB9904553D0 (en) 1999-04-21
JP4019156B2 (en) 2007-12-12
AU4161397A (en) 1998-03-19
GB2331411A (en) 1999-05-19
GB2331411B (en) 2001-01-10
US5702271A (en) 1997-12-30
JP2000517098A (en) 2000-12-19

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