CA1245733A - Backplane connector - Google Patents

Backplane connector

Info

Publication number
CA1245733A
CA1245733A CA000488893A CA488893A CA1245733A CA 1245733 A CA1245733 A CA 1245733A CA 000488893 A CA000488893 A CA 000488893A CA 488893 A CA488893 A CA 488893A CA 1245733 A CA1245733 A CA 1245733A
Authority
CA
Canada
Prior art keywords
contact
improvement
portions
sidewalls
contacts
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
Application number
CA000488893A
Other languages
French (fr)
Inventor
Lennart B. Johnson
William B. Walkup
Steven F. Laychak
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Teradyne Inc
Original Assignee
Teradyne Inc
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 Teradyne Inc filed Critical Teradyne Inc
Priority to CA000566937A priority Critical patent/CA1259382A/en
Application granted granted Critical
Publication of CA1245733A publication Critical patent/CA1245733A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00Structural 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
    • H01R12/70Coupling devices
    • H01R12/71Coupling devices for rigid printing circuits or like structures
    • H01R12/72Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures
    • H01R12/73Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures connecting to other rigid printed circuits or like structures
    • H01R12/735Printed circuits including an angle between each other
    • H01R12/737Printed circuits being substantially perpendicular to each other
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/648Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H01R13/658High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
    • H01R13/6591Specific features or arrangements of connection of shield to conductive members
    • H01R13/6594Specific features or arrangements of connection of shield to conductive members the shield being mounted on a PCB and connected to conductive members

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Abstract

Abstract of the Disclosure A backplane/daughter board connector including a first connector element and a mating second connector element that fits between upwardly extending sidewalls of the first element, the first element being provided with an additional contact carried by one of its sidewalls, and the mating connector element being provided with a further contact carried by a facing outside wall.

Description

BACKPLANE CONNECqOR
~'` ,.
Field of the Invention .
The invention relates to a connector for connecting a daughter printed circuit board (~CB1 to a 5 backplane.

Backg of the Invention Backplanes are printed circuit boards or metal plates on the upper sides of which "daughter" PCB's are detachably mounted perpendicularly to the backplanes for 10 easy removal. One way of electrically connecting a daughter board to another daughter board, the backplane, and other circuitry is by a two-piece multiple-contact connector consisting of a first connector element that is attached to the backplane and a mating second 15 connector element that is attached to the dau~hter board and fits between upwardly extending sidewalls oE the c first element. When the two e:lements are joined, a plurality o~ rows oE contact posts directed upwardly between the sidewalls of the ~irst element are connected 20 to a plurality of corresponding downwardly directed forked contacts of the second element.
.. .
Summary _ the Invention We have discovered that by providing a bac~plane~daughter board connector with an additional contact carried by a sidewall of one of the two connector elements and a ~urther contact carried by a facing outside wall of the other connector element an additional connection for distributing current, e.g., for ground or power, can be advantageouslY provided without increasing the overall size of the connector.

.

.
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.
- 2 - ~ ~ ~5~33 In preferred embodiments, there are grooves in the sidewall of the connector element toward the backplane and a plurality of resilient contact portions extending from the grooves; the eontact portions have laterally extending tabs at their upper movable ends to prevent the eontaet portions from extending too far into the region between the sidewalls to prevent jamming;
there are further recesses in the sidewall near the tops of the grooves to receive the movable ends of the contact portions when they are deElected; a single contact in the connector element toward the baclcplane has a plurality of eontaet portions located in ~he grooves; and the contacts on the other connector element are lar~e enough to contaet a plurality of contaet portions of a eontaet of the first conneetor element.

Deseription of the _eferred Embodiment ( The strueture and operation of the presently preferred embodiment of the invention will now be deseribed after first briefly describing the drawings.
Fig, 1 is a perspective view of a conneetor for connecting a daughter printed circuit board to a backplane aceording to the invention.
Fig. 2 is a vertical sectional view, taken at 2-2 of Fig. 1, of the Fig. 1 connector.
Fig. 3 is an exploded diagrammatic perspective view showing a contact of a daughter board connector element of the Fig, 1 connector and the portion of the daughter board connector element on which the contact is carried.
Fig. 4 is an exploded perspective view showing a contact of a backplane connector element o the Fig. 1 connector prior to placement in grooves of sidewalls of a backplane connector element of the Fig. 1 connector.

~ 3 ~ ~ ~ ~S~33 Fig. 5 is a vert cal sectional view, taken at 5-5 of Fig. 1, showing mating of contacts of the Fig. 1 connector in use.
.
Structure Referring to Fig. 1, there is shown two~piece connector 10 for electrically connecting daughter printed circuit board 12 (shown diagrammatically without any electronic components) to backplane 14. Connector i 10 includes lower backplane connector element 16 - 10 connected to backplane 14 and upper daughter board connector element 20 connected to daughter board 12.
Secured to backplane 14 and passing upwardly through backplane connector element 16 are four rows of signal contact pins 18 for mating with a corresponding plurality of forked signal contacts 22 mounted in housing 24 (Fig. 2~.
ReEerring to Figs. 2, 3 ancl 5, signal contacts 22 of daugllter board connector element 20 are Eorked at lower ends 26 in boxes 28 o~ plastic housing 24 and extend upwardly and are bent horizontally. The other ends 23 of contacts 22 pass through plastic guide board 30 and holes in daughter board 12, where they are soldered (Fig. 5). Alumin~m stiffener 32 is connected between guide board 30 and housing 24 to cover exposed --25 portions of contacts 22 and provide structure to daughter board connector element 20. On an outer face of side wall 34 of housing 24 are ground contacts 36, shown isolated from housing 24 and in more detail in Fig. 3. Contacts 36 are secured to wall 34 of housing ~4 via vertical tabs 37, secured in place during molding of housing 24, and horizontal tabs 39, bent upward after molding. The lower ends of contacts 36 are inclined to provide guide surfaces 40. Laterally extending prongs .-- ._ '~__ _ 7._ _ . _ _~ ~ . __ . __ .. ' _ _ _ . __ . _~ ~ .. _._ . ~ .. __ _ ~. __ _ . .. , _ ._ _. . _. .. .. ' ' --~ ' ' _ 4 _ ~ 5733 , .......................................................... .

38 of contacts 36 pass through holes in daughter board 12, where they are soldered (Fig. 5). Contacts 36 are approximately 0~008 inch thick and are made of phosphor bronze with 100 microinches of nickel covered by 20 microinches of plated gold.
Referring to Figs. 2, 4 and 5, it is seen that signal contact pins 18 of backplane connector element 16 are press fit in backplane 14, and that backplane connector element 16 has sidewall contacts 42 provided in grooves 44 of right-hand sidewall 46 extending upward from base 47. Each contact 42 has three contact portions 50 that extend upward from connecting portion 53 through holes 51 to grooves 44. Adjacent to the top of base 47, contact portions 50 bend away from contact region or cavity 54 between siaewalls 46, 56 to fulcrum portion 52. From there they bend back toward and into contact region 54, and at contact points 48 they begin ( to bend back away from region ~4. At the upper movable end of each contact portion 50 is tab 58, which extends lateeally behind overhangin~ portion 60 oE sidewall 46.
Recess 45 extends further into sidewall 46 at the top of groove 44. Contacts 42 are made of a copper alloy (C72500) and have a welded inlay at contact areas 48 ~Fig. 4) of 100 microinches of nickel covered by 100 microinches of gold.

Operation In use, backplane connector element 16 is connected to backplane 14 by inserting the lower press-fit portions of contact pins 18 and contacts 42 through holes in the backplane. Daughter board connector element 20 is connected to daughter board 12 by screw 64 through guide board 30 and stiffener 32 and also by sol~er where ends 23 of contacts 22 and prongs ~ 5 ~ ~2~ 3 38 of contacts 36 pass through holes 62 in daughter board 12. Contacts 18, 22 are used to carry signals, while contacts 36, 42 are used to carry ground.
Before insertion of daughter board connector - 5 element 20 into contact region 54 r tabs 58 bear against overhanging por~ions 60, owing to preloading forces, and precisely locate the contact points 48 so that they do not extend into contact region 54 so far that there would be jamming during insertion. When daughter board connector element 20 is inserted into contact region 54, contact pins 18 are received between forked prongs 26;
the upper ends of contacts 42 are bent back slightly by inclined surface 39 and received in recesses 45, and contacts 36 touch contact points 48 of contacts 42, as lS is shown in Fig. 5. Recesses 45 are provided so that contact portions 50 are only bent at the lower ends to prevent the very large insertion ~orces that would be C required if contact portions 50 were supported at two enc3s, In addition to providing ground connections without taking up any extra space on connector 10, a further advantage is that ground contact prongs 38 can be pravided on daughter boards 12 immediately adjacent to a row of signal contacts 22 to provide a short ground path to permit high-speed switching, Other Embodiments Other embodiments of the invention are within the scope o the ollowing claims.

Claims What is claimed is:
~ .

Claims (13)

1. In a connector for connecting a daughter printed circuit board to a backplane, said connector comprising a first connector element including a base of insulating material, a pair of first sidewalls of insulating material extending upwardly from said base and spaced from each other to define a contact region between its inwardly directed faces, and a plurality of first contacts extending upwardly from said base in said contact region, and a second connector element including a housing of insulating material having outwardly directed second sidewalls for facing and fitting between said first sidewalls and a plurality of downwardly directed second contacts therein aligned with said first contacts for mating with said first contacts when said housing is inserted between said first sidewalls, the improvement wherein a said first sidewall carries at least one third contact having an inwardly directed third contact portion, and a said second sidewall carries at least one fourth contact having an outwardly directed fourth contact portion for contacting said third contact portion.
2. The improvement of claim 1 wherein said first sidewall carrying said at least one third contact has grooves in it and openings to said grooves in its inwardly directed face, there are a plurality of third contact portions in said grooves and exposed to said contact region, and said third contact portions are resilient.
3. The improvement of claim 2 wherein said contact portions extend into said contact region, said sidewalls have overhanging portions adjacent to said openings in said inwardly directed face such that said openings are smaller in width than the groove behind said overhanging portion, and said third contact portions have movable ends that are bent away from said contact region and have laterally extending tabs that interact with said overhanging portions to prevent said contact portion from extending into said contact region too far, to prevent jamming.
4. The improvement of claim 3 wherein extending further into said sidewall from said grooves are recesses for receiving said movable ends when said contact portions are biased into said grooves.
5. The improvement of claim 2 wherein said grooves communicate with holes through said base, and said third contacts pass through said holes.
6. The improvement of claim 5 wherein each said third contact has a plurality of said third contact portions that pass through said holes and are joined together under said holes by a connecting portion.
7. The improvement of claim 6 wherein said contact portions extend into said contact region between said inwardly directed faces, said sidewalls have overhanging portions adjacent to said openings in said inwardly directed face such that said openings are smaller in width than the groove behind said overhanging portion, and said third contact portions have movable ends that are bent away from said contact region and have laterally extending tabs that interact with said overhanging portions to prevent said contact portion from extending into said contact region too far, to prevent jamming.
8. The improvement of claim 6 wherein each said contact portion has a fulcrum portion above its corresponding said hole, said contact portion bending away from said contact region between said sidewalls and back toward said contact region at said fulcrum portion.
9. The improvement of claim 1 wherein said fourth contact includes a plurality of connection portions for extending through holes in said daughter board.
10. The improvement of claim 9 wherein said fourth contact has tabs securing said contact to said face of said second connector element.
11. The improvement of claim 2 wherein said fourth contact is adapted to contact a plurality of said third contact portions.
12. The improvement of claim 7 wherein said fourth contact portion is adapted to contact a plurality of said third contact portions and has a lower portion that is inclined to bias said third contact portions away from said region during insertion.
13. The improvement of claim 1, in combination with a daughter circuit board connected to one said connector element, and a backplane connected to the other said connector element.
CA000488893A 1984-08-17 1985-08-16 Backplane connector Expired CA1245733A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA000566937A CA1259382A (en) 1984-08-17 1988-05-16 Backplane connector

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US64191584A 1984-08-17 1984-08-17
US641,915 1984-08-17

Related Child Applications (1)

Application Number Title Priority Date Filing Date
CA000566937A Division CA1259382A (en) 1984-08-17 1988-05-16 Backplane connector

Publications (1)

Publication Number Publication Date
CA1245733A true CA1245733A (en) 1988-11-29

Family

ID=24574389

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000488893A Expired CA1245733A (en) 1984-08-17 1985-08-16 Backplane connector

Country Status (5)

Country Link
JP (1) JPS61116782A (en)
CA (1) CA1245733A (en)
DE (1) DE3529218C2 (en)
FR (1) FR2569309B1 (en)
GB (1) GB2163305B (en)

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US5704794A (en) * 1986-12-29 1998-01-06 Labinal Components And Systems, Inc. Electrical connectors
US4747787A (en) * 1987-03-09 1988-05-31 Amp Incorporated Ribbon cable connector
JPS63167683U (en) * 1987-04-22 1988-11-01
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DE3806049A1 (en) * 1988-02-26 1989-09-07 Licentia Gmbh CONNECTOR FOR ELECTRICAL CABLES
US4871321A (en) * 1988-03-22 1989-10-03 Teradyne, Inc. Electrical connector
US4932888A (en) * 1989-06-16 1990-06-12 Augat Inc. Multi-row box connector
US5099394A (en) * 1989-10-24 1992-03-24 International Business Machines Corporation Offset basecard
US5133679A (en) * 1990-06-08 1992-07-28 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
EP0540310B1 (en) * 1991-11-01 1996-07-03 The Whitaker Corporation Electrical connector having externally mounted ground plates
US5236368A (en) * 1992-01-06 1993-08-17 Burndy Corporation Printed circuit board and outrigger edge connector assembly and method of assembling the same
GB9205088D0 (en) * 1992-03-09 1992-04-22 Amp Holland Shielded back plane connector
GB9205087D0 (en) * 1992-03-09 1992-04-22 Amp Holland Sheilded back plane connector
US5403206A (en) * 1993-04-05 1995-04-04 Teradyne, Inc. Shielded electrical connector
JP2824452B2 (en) * 1995-10-12 1998-11-11 株式会社ソニー・コンピュータエンタテインメント connector
AU8030998A (en) * 1997-07-10 1999-02-08 Whitaker Corporation, The Apparatus for forming a connection through a board
US8366485B2 (en) 2009-03-19 2013-02-05 Fci Americas Technology Llc Electrical connector having ribbed ground plate
US8231415B2 (en) 2009-07-10 2012-07-31 Fci Americas Technology Llc High speed backplane connector with impedance modification and skew correction
EP2624034A1 (en) 2012-01-31 2013-08-07 Fci Dismountable optical coupling device
US9257778B2 (en) 2012-04-13 2016-02-09 Fci Americas Technology High speed electrical connector
US8944831B2 (en) 2012-04-13 2015-02-03 Fci Americas Technology Llc Electrical connector having ribbed ground plate with engagement members
USD727268S1 (en) 2012-04-13 2015-04-21 Fci Americas Technology Llc Vertical electrical connector
USD727852S1 (en) 2012-04-13 2015-04-28 Fci Americas Technology Llc Ground shield for a right angle electrical connector
USD718253S1 (en) 2012-04-13 2014-11-25 Fci Americas Technology Llc Electrical cable connector
USD751507S1 (en) 2012-07-11 2016-03-15 Fci Americas Technology Llc Electrical connector
US9543703B2 (en) 2012-07-11 2017-01-10 Fci Americas Technology Llc Electrical connector with reduced stack height
USD745852S1 (en) 2013-01-25 2015-12-22 Fci Americas Technology Llc Electrical connector
USD720698S1 (en) 2013-03-15 2015-01-06 Fci Americas Technology Llc Electrical cable connector
DE102022103406B3 (en) 2022-02-14 2023-05-11 Erni International Ag Connector with shielding plate

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Also Published As

Publication number Publication date
FR2569309B1 (en) 1992-11-06
GB8520284D0 (en) 1985-09-18
GB2163305A (en) 1986-02-19
DE3529218A1 (en) 1986-02-27
GB2163305B (en) 1988-11-02
JPS61116782A (en) 1986-06-04
DE3529218C2 (en) 1995-12-14
FR2569309A1 (en) 1986-02-21
JPH0453076B2 (en) 1992-08-25

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Legal Events

Date Code Title Description
MKEX Expiry

Effective date: 20051129