US3853379A - Printed circuit board connector assembly - Google Patents

Printed circuit board connector assembly Download PDF

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Publication number
US3853379A
US3853379A US00381266A US38126673A US3853379A US 3853379 A US3853379 A US 3853379A US 00381266 A US00381266 A US 00381266A US 38126673 A US38126673 A US 38126673A US 3853379 A US3853379 A US 3853379A
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US
United States
Prior art keywords
contacts
connector
printed circuit
circuit board
assembly
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 - Lifetime
Application number
US00381266A
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English (en)
Inventor
D Goodman
J Langenbach
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.)
TDK Micronas GmbH
ITT Inc
Original Assignee
Deutsche ITT Industries GmbH
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 Deutsche ITT Industries GmbH filed Critical Deutsche ITT Industries GmbH
Priority to US00381266A priority Critical patent/US3853379A/en
Priority to DE2433385A priority patent/DE2433385A1/de
Priority to IT25091/74A priority patent/IT1017106B/it
Priority to AU71314/74A priority patent/AU7131474A/en
Priority to GB3184674A priority patent/GB1443879A/en
Priority to JP8312274A priority patent/JPS5431588B2/ja
Priority to FR7425158A priority patent/FR2238313B1/fr
Priority to CA205,164A priority patent/CA1015419A/en
Application granted granted Critical
Publication of US3853379A publication Critical patent/US3853379A/en
Assigned to ITT CORPORATION reassignment ITT CORPORATION CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: INTERNATIONAL TELEPHONE AND TELEGRAPH CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01R12/82—Coupling devices connected with low or zero insertion force
    • H01R12/85—Coupling devices connected with low or zero insertion force contact pressure producing means, contacts activated after insertion of printed circuits or like structures
    • H01R12/89—Coupling devices connected with low or zero insertion force contact pressure producing means, contacts activated after insertion of printed circuits or like structures acting manually by moving connector housing parts linearly, e.g. slider
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/14—Mounting supporting structure in casing or on frame or rack
    • H05K7/1401—Mounting supporting structure in casing or on frame or rack comprising clamping or extracting means
    • H05K7/1402—Mounting supporting structure in casing or on frame or rack comprising clamping or extracting means for securing or extracting printed circuit boards
    • H05K7/1409—Mounting supporting structure in casing or on frame or rack comprising clamping or extracting means for securing or extracting printed circuit boards by lever-type mechanisms

Definitions

  • ABSTRACT An assembly is provided in which a printed circuit board is inserted into a supporting frame for engagement with an electrical connector with zero insertion force. After the printed circuit board is mounted on the frame, electrical contacts in the connector are cam actuated to make electrical engagement with associated contacts on the printed circuit board. A card guide is slidably mounted on the frame for guiding the printed circuit board contacts into juxtaposition with the connector contacts on the frame.
  • a cam for actu' ating the contacts is carried by the card guide.
  • a lever mounted on the frame shifts the card guide to cam actuate the contacts.
  • the lever latches the printed circuit board in the frame. Lifting the lever releases the cam actuated contacts and the latching arrangement,
  • This invention relates generally to a printed circuit board connector assembly and, more particularly, to a connector assembly. in which the force required to insert a printed circuit board therein is substantially zero.
  • the present invention an assembly which eliminates the high insertion and extraction forces often required in prior art arrangements.
  • the wear on the printed circuit board contacts is overcome due to the elimination of the force the spring contact normally exerts against the forward end of the printed circuit board contacts when the latter are inserted and extracted.
  • the cam actuated movable contacts are activated by a cam which is reciprocally movable in the direction of the printed circuit board card guide, thus making better use of available space than rotary cam actuators of the type utilized in prior art connectors.
  • the connector is rugged and allows numerous insertions and extractions of the printed circuit board.
  • the printed circuit board contacts may not be inserted into the connector without the cam actuated contacts being inactivated, thus preventing any damage to either set of contacts upon initial insertion of the board into the assembly. Further, the board cannot be removed from the assembly without the cam-actuated contacts being inactivated.
  • a printed circuit board connector in which one or more printed circuit boards may be mounted in a supporting frame.
  • the frame is provided with a card guide which guides the printed circuit board contacts into juxtaposition with a set of contacts fixedly mounted at one end of the frame.
  • the printed circuit board faces which engage individual contacts mounted on either the printed circuit board or the frame.
  • Actuation of the cam in one direction shifts the plate laterally to move one set of contacts in tandem into engagement with the other set of contacts. Movement of the cam in the opposite direction releases the contacts from engagement with each other, thus allowing the printed circuit board to be freely withdrawn from the frame.
  • the cam is reciprocally movable in the direction of movement of the printed circuit board, it may be actuated by a lever mechanism mounted on the outer end of the frame, thus utilizing less space than that required by conventional printed circuit board connectors utilizing rotary cam actuators. Also, the lever mechanism may be arranged to allow insertion and withdrawal of the printed circuit board into and from the frame only when the contacts are in their inactivated position, thus eliminating the possibility of excessive wear occuring between the two sets of contacts at the time of insertion or withdrawal of the board.
  • FIG. 1 is a fragmentary perspective view of the printed circuit board connector assembly of the present invention showing two printed circuit boards partially inserted into the frame of the assembly.
  • FIG. 2 is a fragmentary partial section through the two connector members of the assembly shown in their mated position, with their contacts disengaged;
  • FIG. 3 is similar to FIG. 2 but showing the contacts in their engaged position
  • FIG. 4 is a fragmentary perspective view of the fixed connector member with portions broken away to illustrate the contact actuating plate for the contacts therein;
  • FIG. 5 is a fragmentary partial vertical section of the lower end of the fixed connector member showing a spring for biasing the contact actuating plate upwardly;
  • FIG. 6 is a fragmentary sideelevational view of the assembly illustrated in FIG. 1 with the printed circuit board in its fully inserted position in the frame and a latching lever in its lifted position;
  • FIG. 7 is similar to FIG. 6 but showing the latching lever in its lowered position
  • FIG. 8 is a vertical sectional view taken along line 8-8 of FIG. 6;-
  • FIG. 9 is a partial vertical sectional view similar to FIGS. 6 and 7 but showing a modified form of a latching lever mechanism in accordance with the present invention.
  • FIGS. 10 and 11 are fragmentary, vertical sectional views similar to FIGS. 2 and 3 showing the structure of the connector members utilized inthe embodiment i1- lustrated in FIG. 9.
  • FIGS. l-8 the preferred embodiment of the. present invention.
  • the printed circuit board assembly of the present invention generally designated l2,'comprises a printed circuit board supporting frame 14 which is mounted on a panel 16.
  • the frame includes a plurality of spaced, parallel pairs of tracks 18 and 20, only two pair being shown in FIG. 1 by way of illustration.
  • the ends of the tracks opposite the panel 16 are interconnected by a cross member 22.
  • the track 18 if formed with a groove 24 which faces a slot 26 formed in the corresponding track 20.
  • An elongated card guide member 28 is formed with a tongue 30 which is slidably engaged in a groove 28 in track 18.
  • the card guide member is formed with a slot 30 which opens in the direction of the slot 26.
  • a printed circuit board 32 is slidable into each pair of slots 26 and 30.
  • a connector member 34 is fixedly mounted at one end of the printed circuit board 32.
  • the connector member is adapted to mate with a second connector member 36 which is fixedly mounted on the panel 16 adjacent to the frame 14.
  • the printed circuit board 32 is inserted into the slots 26 and 30 in the frame with the connector member 34 aligned with connector member 36 mounted on the panel 16 so that the respective contacts in the cconnector members will be in juxtaposition when the connector members are mated.
  • the connector member 34 comprises an insulator housing 38 formed with a plurality of openings 40 therein.
  • Each opening contains an individual contact 42 which is formed with a contacting surface 44 disposed within the opening 40.
  • Each contact 42 terminates in a terminal portion 46 which extends outwardly from the rear of the opening 40 and is bent atright angles as best seen in FIG. 1.
  • the end 48 of each terminal portion has'an interference fit with a plated through hole 50 formed in the printed circuit board 32.
  • a conductive layer 52 joins each of the plated through holes 50 in a manner well known in the art. Only four of such contact terminal portions 46 are illustrated in FIG. 1 for purposes of clarity. It is, of course, understood that normally there will be provided a contact in each of the openings 40 in the insulator 38.
  • the connector member 36 also comprises an insulator housing 54 formed with a plurality of openings 56 which are aligned with the openings 40 in the connector member 34 when the two connector members are mated.
  • a contact 58 is mounted in each of the openings 56.
  • Each contact 58 includes an elongated beam portion 60 which extends outwardly from the opening 56 and terminates in a contacting surface 62.
  • An insulator plate 64 is slidably mounted in the housing 54 for movement in a plane which is perpendicular to the slots 26 and 30 in the track 20 and card guide member 28, respectively. As seen in FIG. 4, the plate 64 is formed with a plurality of spaced apertures 66 through which the contacts 58 extend.
  • a projection 68 is formed on one wall of each of the apertures 36 engaging the beam portion 60 of each contact 58.
  • the upper end of the plate 64 is formed with an inclined surface 70 which engages a similarly inclined surface 72 formed on the end of a cammember 74.
  • This cam member is fixedly attached to the end of the card guide member 28 and extends into an opening 76 in the housing 54 of the connector member 36.
  • a coil spring 78 acts upon the bottom of the plate 64, urging the inclined surface 70 into engagement with the surface 72 on the cam member. Since the cam member is carried by the card guide member 28, it is movable in a path which is perpendicular to the path of movement of the plate 64.
  • the plate 64 is normally positioned by the spring 78 such that the contacting surfaces 44 of the contacts 42 are out of engagement with the contacting surfaces 62 of the contacts 58.
  • the cam member 74 when the cam member 74 is shifted in the direction indicated by the arrow in FIG. 2, the surface 72 thereof, by its sliding contact with surface 70 on the plate 74, will urge the plate 64 downwardly to the position shown in FIG. 3 thereby shifting the contacts 58 in tandem so that the contacting surfaces 44 and 62 of the respective sets of contact will engage each other with a high unit force of contact.
  • the spring 78 will return the plate 64 to its uppermost position whereupon the contacting surfaces of the two sets of contacts will disengage.
  • the connector members 34 and 36 may be provided with mating power or coaxial contacts 80 and 82 which engage one another when the connector members areinitially mated and, thus, are not activated by the slidable actuating plate 64. 1
  • a latching mechanism is provided for effecting such movement of the card guide member 28.
  • Such latching mechanism comprises a lever 86 which is 'pivotally mounted by means of a pin 88 to a plate 90. This plate is fixedly connected by screws 92 to the cross member 22 of the frame.
  • the lever 86 is essentially in the form of a crank :having a downwardly extending arm 94 formed with an elongated slot 96.
  • the outer end of the card guide member 28 extends beyond the end of the track 18 and carries a laterally extending pin 98. This pin is received in the slot 96 to provide a pivotal connection between the lever 86 and the card guide member.
  • the other end of the lever 86 opposite the arm 94 is formed with a downwardly extending finger 100.
  • An arcuate pawl 102 is formed on the bottom of the lever between the finger 100 and the .pivot pinz88.
  • the-contact activating lever 86 is located on the front end of the frame for easy access rather than behind the panel 16 as in conventional connector assemblies.
  • any number of boards and latching mechanisms 84 may be provided on the frame 14. If desired, the levers 86 may be ganged by connection to a common rod, not shown, which would allow the levers to be actuated simultaneously if desired.
  • FIGS. 9-11 illustrate a modified form of the invention.
  • a molded plastic or metal gripping member 104 is fixedly mounted on one corner of the printed circuit board 32 opposite the end of the board from connector member 34.
  • the member 104 is formed with an arcu ate notch 106 which opens in the direction of the pawl board 32 is fully positioned in the frame and the connector members 34 and 36 are mated, the lever 86 ispushed downwardly to the position illustrated in FIG. 7. Downward movement of the lever86 brings the pawl 102 into the notch 106.
  • the pawl and notch provide a mechanical interlock whereby the printed circuit board and connector halves must be in proper position before the lever 86 may be moved downwardly.
  • the slidable plate 64 is in its contact activating position when the lever 86 is in the downward position illustrated in FIG. 7. Inthis position of the lever the finger 100 thereon is disposed in the path ofthe card guide slot 30, thereby preventing insertion of a board 32 into the frame 14. This assures that the board cannot be inserted into the frame when the contacts 58 are in their activated position. Likewise, the board cannot be removed from the frame until the contacts are inactivated by raising the lever 86 to the position illustrated in FIG. 6. Thus, the lever 86 assures that there is not untimely insertion or withdrawal of the printed circuit board from the frame 14, and serves to latch the board in the frame when the contacts are in their activated position.
  • the board insertion and withdrawal operations are easily effected by the present invention, with a relatively simple arrangement, due to the fact that the slidable plate 64 is actuated to activate the contacts in the connector members by the simple push-pull or reciprocal movement of thecam member74 which is carried by the slidable card guide member 28, This arrangement requires only a relatively small space,
  • the basic structure is as previously described and like numbers primed are used to indicate like or corresponding parts.
  • the cam member 74' is shifted away than pushed toward the connector member as in the previous embodiment.
  • the inclined surfaces and 72' on the plate 64 and cam member 74, respectively are inclined in a direction opposite to the corresponding surfaces in the first embodiment of the invention described herein.
  • the contacting surfaces 44 andv62' of the contacts 42' and 58, respectively are out of engagement.
  • the inclined surface 72 will act upon the surface 70' to urge the plate 64 downwardly to the position illustrated in FIG. 11,
  • the contacts 42 in the connector member 34 could be extended so that the contacting surfaces 62 of the contacts 58 could be disposed within the openings 56 in the mating connector member 36.
  • the contact plate 64 could be mounted in the connector member 34 for activating the contacts 42 rather than in the connector member 36.
  • a printed circuit board connector assembly comprising:
  • Supporting frame including at least one pair of fixed tracks
  • a card guide member slidably mounted on one of said tracks, said card guide member being formed with a slot therein facing a slot formed in the other track;
  • said printed circuit board having conductive layers thereon and a first connector member mounted on one end thereof;
  • said first connector member having a first set of contacts secured in individual openings therein, each contact of said first set of contacts having a contacting surface;
  • said second connector member having a second set 20 to said conductive layers on said printed circuit 3 board; each of said contacts of said second set of contacts being associated with a contact of said first set of contacts and being spaced from said associated contact when saidconnector members are mated;
  • latching means on said frame engageable with the. other end of said printed circuit board for retaining said board in said slots with said first and second connector members mated.
  • said latching means is operable to activate said actuating means.
  • said actuating means is fixed to said card guide member adjacent one end thereof;
  • said latching means is pivotally connected to both said frame and the other end card guide member, shifting of said latching means in one direction effecting sliding movement of said card guide member on said track and, hence, movement of said actuating means.
  • said contact moving means comprises an insulator plate slidably mounted in said one connector member; and 2 said actuating means comprises a cam operatively engageable with said plate, shifting of said latching means in said one direction moving said cam to shift said plate in one direction to being said first and second connector member contacting surfaces 10 least one printed circuit board, a frame for supporting said board, means on said frame defining a slot for guiding said board, said board having conductive layers thereon and a first set of contacts associated with said layers, and a second set of contacts fixedly mounted ad- 15 jacent one end of said frame in juxtaposition with said first set'of contacts when said printed circuit board is mounted in said frame, the improvement which comprises:
  • a card guide member slidably mounted on said frame, said slot being formed in said card guide member; said first and second sets of contacts being spaced from one another when said board is mounted in said frame; means for moving one of said sets of contacts in tandem causing said two sets of contacts to engage; and means carried by said slidable card guide for actuating said moving means.
  • An assembly as set forth in claim 7 including: lever means mounted on said frame operable to activate said actuating means.
  • pawl means carried by said lever means insertable into a notch formed in said board only when ssid first and second sets of contacts are in juxtaposition.
  • said lever means is pivotally connected to both said frame and said card guide member, shifting of said lever means in one direction effecting sliding movement of said card guide member on said track and, hence, movement of .said actuating means.
  • said contact moving means comprises an insulator plate slidably mounted for movement in a plane perpendicular to said card guide member; and said actuating means comprises a cam operatively engageable with said plate, and shifting of said lever means in said one direction moving said cam to shift said plate in one direction to bring said first and second sets of contacts into engagement.
  • spring means biasing said plate in the opposite direction into engagement with said cam.
  • a support frame including at least one pair of fixed tracks; a card guide member slidably mounted on one of sai tracks, said card guide member being formed with a slot therein facing a slot formed in the other track, said slots being adapted to slidably receive said printed circuit board;
  • each of said contacts in said second connector member being associated with a contact in said first con nector member and being spaced from said associated contact when said connector members are mated;
  • an insulator plate mounted for sliding movement in said second connector member in a plane perpendicular to said card guide member, said plate hav ing surfaces thereon engageable with individual contacts in said second connector member, movement of said plate in one direction causing said contacts in said second connector member to shift in tandem thereby bringing'said first and second connector member contacting surfaces into engagement after said first connector member is mated with said second connector member;
  • cam means carried by said card guide member operatively engageable with said plate, said cam means moving said plate in said one direction upon sliding movement of said card guide member in a predetermined direction.
  • An assembly as set forth in claim 14 including:
  • said connector member said plate having surfaces engageable with said contacts, sliding movement of said plate in one direction shifting said contacts in tanedm in said direction.
  • cam means mounted on said support means for sliding movement in a direction perpendicular'to the path of movement of said plate, said cam means being operatively engageable with said plate, sliding movement of said cam means in a predetermined direction moving said plate in said one direction to thereby shift said first-mentioned contacts in tandem, for engagement with said contacts on said printed circuit board.
  • said supporting means includes a card guide member formed with one of said slots and slidably mounted for movement in a direction perpendicular to said path of movement of said plate, said cam means being carried by said card guide member.
  • lever means on said support means for moving said card guide member in said predetermined direction.
  • lever means on said support means movable between first and second positions movement of said lever means from said first to said second position causing said cam means to move in said predetermined direction;
  • said lever means being formed with blocking, means, in said second position of said lever means said blocking means preventing insertion of said printed circuit board into said support means.
  • a printed circuit board connector assembly comprising:
  • cam means reciprocally movably in a path extending.
  • lever means on said frame for reciprocally moving said cam means.
  • said lever means is pivotally movable between first and second positions, movement of said lever means from said first position to said second position causing said cam means to move in said predetermined direction.
  • said lever means is formed with blocking means, in said second position of said lever means said blocking means preventing insertion of said board into said frame.
  • pawl means carried by said lever means insertable into said notch when said lever means is in said second position, one side of said pawl means engaging with one side of said notch to prevent withdrawal of said board from said frame.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Mounting Of Printed Circuit Boards And The Like (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
US00381266A 1973-07-20 1973-07-20 Printed circuit board connector assembly Expired - Lifetime US3853379A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US00381266A US3853379A (en) 1973-07-20 1973-07-20 Printed circuit board connector assembly
DE2433385A DE2433385A1 (de) 1973-07-20 1974-07-11 Baugruppentraeger
IT25091/74A IT1017106B (it) 1973-07-20 1974-07-12 Gruppo connettore particolarmente per pannelli per circuiti stampati
AU71314/74A AU7131474A (en) 1973-07-20 1974-07-17 Printed circuit
GB3184674A GB1443879A (en) 1973-07-20 1974-07-18 Printed circuit board connector assembly
JP8312274A JPS5431588B2 (cg-RX-API-DMAC7.html) 1973-07-20 1974-07-19
FR7425158A FR2238313B1 (cg-RX-API-DMAC7.html) 1973-07-20 1974-07-19
CA205,164A CA1015419A (en) 1973-07-20 1974-07-19 Printed circuit board connector assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00381266A US3853379A (en) 1973-07-20 1973-07-20 Printed circuit board connector assembly

Publications (1)

Publication Number Publication Date
US3853379A true US3853379A (en) 1974-12-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00381266A Expired - Lifetime US3853379A (en) 1973-07-20 1973-07-20 Printed circuit board connector assembly

Country Status (8)

Country Link
US (1) US3853379A (cg-RX-API-DMAC7.html)
JP (1) JPS5431588B2 (cg-RX-API-DMAC7.html)
AU (1) AU7131474A (cg-RX-API-DMAC7.html)
CA (1) CA1015419A (cg-RX-API-DMAC7.html)
DE (1) DE2433385A1 (cg-RX-API-DMAC7.html)
FR (1) FR2238313B1 (cg-RX-API-DMAC7.html)
GB (1) GB1443879A (cg-RX-API-DMAC7.html)
IT (1) IT1017106B (cg-RX-API-DMAC7.html)

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Also Published As

Publication number Publication date
FR2238313A1 (cg-RX-API-DMAC7.html) 1975-02-14
AU7131474A (en) 1976-01-22
IT1017106B (it) 1977-07-20
FR2238313B1 (cg-RX-API-DMAC7.html) 1980-01-04
GB1443879A (en) 1976-07-28
CA1015419A (en) 1977-08-09
JPS5431588B2 (cg-RX-API-DMAC7.html) 1979-10-08
JPS50124166A (cg-RX-API-DMAC7.html) 1975-09-30
DE2433385A1 (de) 1975-02-06

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