EP0002114A1 - Connecteur en bordure pour cartes à circuits imprimés à force d'insertion nulle - Google Patents

Connecteur en bordure pour cartes à circuits imprimés à force d'insertion nulle Download PDF

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Publication number
EP0002114A1
EP0002114A1 EP78300558A EP78300558A EP0002114A1 EP 0002114 A1 EP0002114 A1 EP 0002114A1 EP 78300558 A EP78300558 A EP 78300558A EP 78300558 A EP78300558 A EP 78300558A EP 0002114 A1 EP0002114 A1 EP 0002114A1
Authority
EP
European Patent Office
Prior art keywords
housing
channel
board
contacts
contact
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.)
Granted
Application number
EP78300558A
Other languages
German (de)
English (en)
Other versions
EP0002114B1 (fr
Inventor
Marvin Leo Yeager
Jerome Andrew Desso
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.)
TE Connectivity Corp
Original Assignee
AMP 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 AMP Inc filed Critical AMP Inc
Publication of EP0002114A1 publication Critical patent/EP0002114A1/fr
Application granted granted Critical
Publication of EP0002114B1 publication Critical patent/EP0002114B1/fr
Expired 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
    • H01R12/88—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 rotating or pivoting connector housing parts

Definitions

  • a zero insertion force printed circuit board edge connector comprising an insulating housing having a channel therein for receiving a printed circuit board along a board insertion path, a row of electrical contacts positioned beside the channel each having a contact surface for engaging the printed circuit board when such has been inserted into the channel, and a cam member movable to displace a contact driving member normally of the base of the channel to move each contact between a board receiving first position in which the contact surface of the contact is withdrawn from the board insertion path and a board engaging second position in which such contact surface intersects the board insertion path.
  • Such connectors which are commonly used in electronic logic systems for the interconnection of circuitry thereof have the advantage that since the printed circuit board is inserted into the channel with the contacts in their first position, friction between the board conductors and the contact surfaces of the contacts, which surfaces will normally be gold plated, is avoided. In these known connectors all the contacts are moved by the contact driving member simultaneously between their first and second positions.
  • the invention proceeds from the realisation that there are many cases in which it is either desirable or necessary, or both, for different circuits such as power, ground and signal circuits to be broken sequentially, for mechanical or electrical reasons.
  • circuits such as power, ground and signal circuits
  • bi-polar logic devices which have both positive or negative power supplies are employed, the latter being referenced to ground, it may occur if the ground circuit is first broken, that supply voltages will "add" across an individual gate element and so destroy it.
  • the generation of spurious transients leading to data falsification may result from the removal of a printed circuit board from a connector.
  • a zero insertion force printed circuit edge connector as defined in the first paragraph of this specification, is accordingly characterised in that the contact driving member is formed with relatively stepped surfaces succeeding one another in the longitudinal direction of the channel for sequential engagement with the contacts of the row, to move them sequentially between their first and second positions, in response to the movement of the cam member.
  • Each stepped surface may be conveniently dimensioned to engage a group of contacts connected to a respective circuit, for example a power circuit, a ground circuit or a signal circuit, whereby these circuits are made and broken sequentially.
  • two rows of contacts of a zero insertion force printed circuit edge connector may be independently driven between board engaging and board disengaging positions. However, all the contacts of each row can be driven only simultaneously between such positions.
  • the connector comprises four primary components, namely, an elongate insulating housing 12, a cam member 14, a contact driving member 16, and a plurality of spring electrical contacts 18.
  • the housing 12 has mounting flanges 20 and 22 at the opposite ends thereof for securing the connector to a mother printed circuit board 24 by means of fasteners 26 ( Figure 2).
  • the housing 12 has formed therein an elongate central guide channel 28 for receiving a daughter circuit board 30, the longitudinal side walls 2 of the housing 12 being formed with spaced ribs 22 projecting inwardly from the side walls 2 and defining recesses 34.
  • Each recess 34 which communicates with the channel 28, receives a respective contact 18.
  • a passage 36 extends from the lower (as seen in Figure 4) end of each recess 34 through a base 38 of the housing 12.
  • the base of the channel 28 is formed with a central longitudinal groove 40 which communicates with a slot 41 in one end of the housing 12 and with an opening 39 in the other end thereof, opposed recesses 42 being formed in the upper (as seen in Figure 1) portions of the side walls of the slot 41 and opening into the upper surface of the housing 12.
  • the contact driving member 16, which lies in the channel 28 is, as best seen in Figure 6, channel shaped, having a base 44 and parallel side walls 46 and 48, the free longitudinal edges of the side walls 46 and 48 being formed, as best seen in Figure 6, with steps 49 so that the height of the free longitudinal edges of these side walls increases from right to left, as seen in Figures 2 and 6.
  • These free longitudinal edges have chamfered outer faces 47 constituting at least two relatively stepped surfaces succeeding one another in the longitudinal direction of the channel 28.
  • the ends of the base 44 have bevelled surfaces 50 and 52. As shown in Figures 2, 4 and 5, the outer or lower surface of the base 44 faces the mouth of the groove 40.
  • the cam member 14 comprises an elongate cam portion 60 and a resilient, loop-shaped, handle 62.
  • the cam portion 60 which is slidably and rotatably received in the groove 40, is shaped, as seen in cross-section ( Figures 4 and 5), as an elongate quadrilateral having parallel sides joined by radii.
  • the handle 62 which has a free end portion 64, extends from the cam portion 60 externally of the housing 12, for rotating the cam portion 60 about its longitudinal axis and for sliding the cam portion 60 longitudinally of the groove 40.
  • the contacts 18 may be formed for example by stamping and forming metal strips, or by rolling and forming wire. Each contact 18 has a resilient, inwardly bowed, board engaging, contact surface 54 and a terminal portion 56 which extends through one of the passages 36 for mechanical and electrical connection to a printed conductor 58 ( Figure 2) on the mother board 24 and to further conductors (not shown) and thus to electrical circuits (not shown) by wire wrap collections (not shown), for example. Each contact 18 is retained against withdrawal from the housing by means, for example, of a locking lance (not shown) or by the flow of the housing material during manufacture of the connector, into an aperture (not shown) in the contact 18.
  • the free end portion 64 of the handle 62 is receivable in the recesses 42 of the housing, for the avoidance unintended rotation of, and removal, in the direction of the arrow B in Figure 1, from the connector of, the cam member 14.
  • the connector is assembled by inserting the cam portion 60 of the member 14 into the groove 40 and the contact driving member 16 into the channel 28, aided by the bevelled surfaces 50 or 52.
  • the cam portion 60 is rotated about its longitudinal axis towards the position of Figure 5 in which the broader sides 61 of the portion 60 extend normally of the base of the groove 40 and of the outer surface of the base 44.
  • the driving member 16 is progressively forced by the cam portion 60 in a direction normal to the base of the groove 40 and thus of the base of the channel 28, and away therefrom, so that the chamfered faces 47 of the free longitudinal edges of the side walls 46 and 48 of the driving member 16 sequentially engage respective groups of the contacts 18 to move the contact surfaces 54 thereof outwardly into the recesses 34 and thus into their board receiving positions shown in Figure 5, in which the contact surfaces 54 are withdrawn from the insertion path of the board 30.
  • the leftward group of contact surfaces, 54a are first driven into their board receiving positions followed by the next adjacent group of contact surfaces, 54b, and so on in predetermined sequence.
  • the daughter board 30 is inserted into the channel 28 and the handle 62 is rotated back to its position of Figure 1, to move the groups of surfaces 54 sequentially back into their board engaging positions.
  • the handle 62 is then pushed rightwardly, i.e. in the opposite direction to that of the arrow B, towards its position of Figure 2 and the free end portion 64 of the handle 62 is resiliently introduced in the recesses 42 so that the contact surfaces 54 are secured in their engagement with the daughter board 30.
  • the daughter board 30 can be subsequently released from the connector by again rotating the handle 62 in the direction indicated by the arrow A, after removing the free end portion 64 of the handle 62 from the recesses 42 and withdrawing the handle 62 in the direction of the arrow B in Figure 1.
  • the groups of contacts 18 are thereby released sequentially so that damage to the circuits to which the contacts 18 are connected and which might arise if the contacts 18 were simultaneously disconnected from the conductors of the board 30, can be avoided.
  • the connector may have but a single row of contacts 18 for engaging printed conductors on only one side of a daughter board, in which case only one side wall of the contact driving member need be stepped.
  • printed circuit board is used herein in its most general aspect and is intended to include any circuit boards, cards or substrates on which electrical conductors have been provided by printing or by any other suitable means.

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)
EP78300558A 1977-11-14 1978-10-27 Connecteur en bordure pour cartes à circuits imprimés à force d'insertion nulle Expired EP0002114B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US85102177A 1977-11-14 1977-11-14
US851021 1977-11-14

Publications (2)

Publication Number Publication Date
EP0002114A1 true EP0002114A1 (fr) 1979-05-30
EP0002114B1 EP0002114B1 (fr) 1981-01-07

Family

ID=25309744

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78300558A Expired EP0002114B1 (fr) 1977-11-14 1978-10-27 Connecteur en bordure pour cartes à circuits imprimés à force d'insertion nulle

Country Status (8)

Country Link
EP (1) EP0002114B1 (fr)
JP (1) JPS5482078A (fr)
BR (1) BR7807359A (fr)
CA (1) CA1088170A (fr)
DE (1) DE2860439D1 (fr)
ES (1) ES475022A1 (fr)
IT (1) IT1100681B (fr)
MX (1) MX144500A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0035354A2 (fr) * 1980-03-03 1981-09-09 AMP INCORPORATED (a New Jersey corporation) Connecteur électrique à force d'insertion nulle
EP0036264A2 (fr) * 1980-03-17 1981-09-23 AMP INCORPORATED (a New Jersey corporation) Contact terminal électrique et un connecteur électrique à force d'insertion nulle contenant ces contacts terminaux
US4700998A (en) * 1986-08-19 1987-10-20 Northern Telecom Limited Multiple contact connector having a low insertion force

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5922502B2 (ja) * 1979-06-16 1984-05-26 太任 権 袋状パンおよびその製造方法
JP2572248Y2 (ja) * 1992-01-13 1998-05-20 日本エー・エム・ピー株式会社 低挿入力型コネクタ及び低挿入力型コネクタ組立体

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1433439A (fr) * 1965-02-15 1966-04-01 Csf Connecteur femelle à enfichage sans frottement
US3648221A (en) * 1969-08-07 1972-03-07 Burndy Corp Multilayer programmable wiring board
US3744005A (en) * 1971-07-02 1973-07-03 Berg Electronics Inc Zero force type connector block
FR2163219A5 (fr) * 1972-08-08 1973-07-20 Bosch
FR2278222A1 (fr) * 1974-07-12 1976-02-06 Socapex Connecteur a enfichage sans frottement
DE2707122A1 (de) * 1976-02-20 1977-09-01 Japan Aviation Electron Kontaktverbindungselement
US4069403A (en) * 1976-09-13 1978-01-17 The Singer Company Switching apparatus for electrically contacting conductive terminals on a circuit-carrying board

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1433439A (fr) * 1965-02-15 1966-04-01 Csf Connecteur femelle à enfichage sans frottement
US3648221A (en) * 1969-08-07 1972-03-07 Burndy Corp Multilayer programmable wiring board
US3744005A (en) * 1971-07-02 1973-07-03 Berg Electronics Inc Zero force type connector block
FR2163219A5 (fr) * 1972-08-08 1973-07-20 Bosch
FR2278222A1 (fr) * 1974-07-12 1976-02-06 Socapex Connecteur a enfichage sans frottement
DE2707122A1 (de) * 1976-02-20 1977-09-01 Japan Aviation Electron Kontaktverbindungselement
US4069403A (en) * 1976-09-13 1978-01-17 The Singer Company Switching apparatus for electrically contacting conductive terminals on a circuit-carrying board

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0035354A2 (fr) * 1980-03-03 1981-09-09 AMP INCORPORATED (a New Jersey corporation) Connecteur électrique à force d'insertion nulle
EP0035354A3 (en) * 1980-03-03 1981-12-30 Amp Incorporated Zero insertion force electrical connector
EP0036264A2 (fr) * 1980-03-17 1981-09-23 AMP INCORPORATED (a New Jersey corporation) Contact terminal électrique et un connecteur électrique à force d'insertion nulle contenant ces contacts terminaux
EP0036264A3 (en) * 1980-03-17 1982-05-05 Amp Incorporated An electrical terminal and a zero insertion force electrical connector comprising such terminals
US4700998A (en) * 1986-08-19 1987-10-20 Northern Telecom Limited Multiple contact connector having a low insertion force

Also Published As

Publication number Publication date
JPS5482078A (en) 1979-06-29
IT7829484A0 (it) 1978-11-06
EP0002114B1 (fr) 1981-01-07
MX144500A (es) 1981-10-20
CA1088170A (fr) 1980-10-21
DE2860439D1 (en) 1981-02-26
IT1100681B (it) 1985-09-28
BR7807359A (pt) 1979-07-24
ES475022A1 (es) 1979-04-16
JPS616511B2 (fr) 1986-02-27

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