EP0178974A1 - Verbindungseinrichtungen für gedruckte Schaltungen - Google Patents

Verbindungseinrichtungen für gedruckte Schaltungen Download PDF

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Publication number
EP0178974A1
EP0178974A1 EP85401791A EP85401791A EP0178974A1 EP 0178974 A1 EP0178974 A1 EP 0178974A1 EP 85401791 A EP85401791 A EP 85401791A EP 85401791 A EP85401791 A EP 85401791A EP 0178974 A1 EP0178974 A1 EP 0178974A1
Authority
EP
European Patent Office
Prior art keywords
contact
printed circuit
circuit board
strand
slide
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
EP85401791A
Other languages
English (en)
French (fr)
Other versions
EP0178974B1 (de
Inventor
François Robert Bonhomme
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT85401791T priority Critical patent/ATE34887T1/de
Publication of EP0178974A1 publication Critical patent/EP0178974A1/de
Application granted granted Critical
Publication of EP0178974B1 publication Critical patent/EP0178974B1/de
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
    • H01R12/89—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

Definitions

  • connection devices for printed circuit boards which comprise a frame or case having an insertion side for printed circuit boards as well as, at least on one side of the board, a set of members of elastic contact oriented transversely to the card and intended to touch through an active area, with an appropriate elastic force, conductive connecting tracks arranged on the adjacent side of the card when the latter has been inserted into the frame or housing of the connection device after having been guided in the mean plane thereof, and in which there is a control mechanism made available to the operator and capable of acting on the elastic members of these connectors alternately in the direction of the closing so as to allow the insertion of a printed circuit board with zero force into the connection device when the contacts are moved away from the board by said mechanism and, on the contrary, to apply the bodies of contact with a determined elastic force on the tracks or areas of the printed circuit board when the elastic contact members have been brought into the closed position.
  • connection devices for printed circuit boards arise from the fact that, during the closing movement, the elastic contact members are applied to the conductive tracks of the card in a direction perpendicular thereto, which does not make it possible to obtain a good quality of contact when the tracks and / or the contact members come to be oxidized or see, in another way, their surface quality deteriorating.
  • the elastic lever arm that is to say the average length between the area of the contact member which comes to rest against the track card and the point of attachment or anchoring of the contact member on the movable control element of the actuating mechanism, is relatively limited, which can be a drawback in some cases.
  • the size of the contact members in the direction perpendicular to the printed circuit board depends on the length of the elastic lever arm as defined above, which leads to a compromise between these two characteristics which does not allow , however, to considerably reduce this size which reflects on the width of the connection device, in particular, in the case where it has two rows of elastic contact members on either side of the plane of the circuit board prints.
  • this width is of the order of 27 mm for a device with two rows of contact members whereas it is very advantageous, in modern apparatus, to reduce this bulk.
  • the present invention therefore proposes to improve these devices and to allow, in a connection device of the type having at least one row of contact members, as well as a control mechanism made available to the operator to distance or bring the contact members closer to the tracks of the printed circuit board as a function of the opening or closing movement of said mechanism according to a complex movement causing self-cleaning of the contact surfaces, to increase the elastic lever arm of the contact members contact, relative to the general dimensions of this device and to reduce the overall width of this same device.
  • Another objective of the invention is to achieve such an improvement making it possible to ensure and then eliminate the contact between the contact members and the tracks of the printed circuit area, in a safe and reliable manner.
  • Yet another objective of the invention is to achieve such an improvement allowing an assembly which can be largely or even completely automated.
  • Yet another object of the invention is to provide such an improvement in which the parts of mechanisms have improved characteristics.
  • the invention relates to an improvement to the connection devices for printed circuit boards, of the type comprising, in a housing having an open insertion side for printed circuit boards, at least one assembly comprising a row of components elastic contacts oriented transversely to the printed circuit board, and a control mechanism made available to the operator or an actuating means and acting on said elastic members in a row by a movable piece or slide to alternately ensure, in a closing movement, the application of the elastic contact members against the tracks of the printed circuit board in a movement including a self-cleaning friction stroke, and in an opening movement, the spacing said elastic contact members away from the corresponding tracks of the printed circuit board, characterized in that the elastic contact members have a e generally elongated overall shape extending along the plane of the printed circuit board, with a first strand making it possible to push the movable part of the contact member towards the printed circuit board when it is stressed by a first part of a part of a mechanism or slide moving parallel to the plane of the printed circuit board in the closing direction, and a second
  • the actual contact area of the elastic contact member is arranged towards a free end of this member, near the second part of the part or slide, but, as a variant, this area can be arranged in a location located between said first and second strands.
  • the elastic contact member may comprise, from its fixing zone in the corresponding connector, a first strand inclined in a direction moving it progressively away from the plane of the printed circuit board and intended to cooperate with a relief, boss or ramp of the slide having a tendency to tilt said strand, against its elastic resistance, in the direction of the plane of the printed circuit board, this first strand extending, at a certain distance, by the second strand formed by an acute angle reference and capable of cooperating with a second relief, boss or ramp of the slider pushing said second strand away from the printed circuit board when the slider moves in the opposite direction, the dimensions and inclinations strands of the contact being of course such that, when one of the reliefs or ramps of the slider comes into action gradually, the other gradually ceases its action.
  • the contact zone is advantageously located at the free end of said second strand and it is understood that, when the first strand is biased by the first slider part moving in the closing direction, the tilting of said first strand ends up bringing the contact zone in contact with the corresponding track on the printed circuit board, after which the continued movement of the slider, causing an additional tilting of the first strand, results in a modification of the length of the elastic contact member, resulting in a movement of the contact zone applied against the printed circuit board over a determined self-cleaning friction stroke.
  • the elastic contact member which can be produced, for example, in elastic metal wire of round, square, rectangular, or other section, or else by winding several twisted wires, has a fixing zone in the housing of the connection device, provided with one or more folds cooperating with a housing of corresponding shape for and in its plane an axial immobilization / of the contact member, the housing being in the form of a slot in a connector contact carrier strip open at one of its ends for the introduction, by transverse movement, of the contact, the housings advantageously having bosses or grooves allowing the tightening of the contacts in their housings as well as their positioning in relation to a reference face.
  • the depths of these housings can vary alternately in order to allow the use of contacts of slightly different shapes having tails emerging from the contact-holding part alternately at different levels so as to increase the distance between tails. contact terminals and facilitate connection of the contacts to the corresponding conductors.
  • the moving part of the mechanism hereinafter called the slide, is preferably made of injected plastic and has a plurality of housings, at the pitch of the contact members, inside which the moving parts of these can move in the housing plan, each housing having a first boss or ramp intended to push back the first strand of the contact member in the closing direction, and a second boss or ramp of opposite orientation positively tending to move the second strand away from the printed circuit board in the closed position and holding it in this position.
  • sliders can advantageously cooperate with mechanism strips, preferably also made of injected plastic material and capable of moving parallel to the row of contact members, that is to say in the direction of the length of the device.
  • t y of connection according to the invention and therefore perpendicular to the direction of movement of the slide (s), the transmission of movement from the slide to the slide being effected in known manner by ramp effect, thanks, for example, to pins coming from injection presented by the slide and penetrating into inclined channels coming from injection and made in the displacement strip, the slides and strips being preferably guided in the housing of the connection device by a sliding assembly of the type dovetail.
  • the device shown comprises a housing 1 having the external shape of a rectangular parallelepiped and having a transverse passage opening out on the one hand on the front face 1a, which constitutes the face receiving the printed circuit board and the rear face 1b which presents the tails of the contact members, the end faces lc and ld being flat without discontinuity then that the side faces le and lf have, in the thickness of the wall, two grooves 2 in dovetail.
  • the space inside the housing constitutes a passage, the cross-section of which can be clearly seen in FIGS. 1, 2 and 4 with from place to place dovetail grooves 3 perpendicular to the grooves 2 and opening into them at the crossing points .
  • the bottom of the dovetail grooves 3 also has, towards the rear face, small grooves 4 whose role will appear later.
  • two slides 5 are inserted, each having two dovetail reliefs 5a which slide in the grooves 3 so that these slides 5 are capable of being moved in a sliding movement. alternating parallel to the direction of insertion of the printed circuit board.
  • These slides 5 have a plurality of cells 6 whose shape will be described in more detail later, these cells being arranged at the bottom of the elastic contact members.
  • the device For the reciprocating movement in the closing and opening direction of the slides 5, the device comprises two mechanism strips 7 made, like the other parts, of injected plastic material and capable of sliding in the dovetail grooves 2, transversely to the sliding direction of the slides 5. These strips 7 have ramp-shaped grooves 8 whose depth is less than the thickness of the strip opening on / on the rear side and into which pins 9 of the parts 5a of the slides penetrate. 5, these pins having been able to come into place thanks to the grooves 4. It is therefore understood that the displacement of the strips 7 causes, by the ramp or cam effect associating the parts 8 and 9, the sliding movement of the slides 5 in the direction arrows.
  • connector strips 10 were housed, the bodies of which come to bear against a shoulder lg of the housing so as to exactly delimit their position.
  • These connector strips 10 which are also made of injected plastic material have a plurality of cells 11, in step with the elastic contact members and whose shape is best seen in FIG. 3. Between each two successive cells 11, the strip 10 has an extension 12, all of the extensions 12 of the two contact carrier strips 10 forming a housing which guides and receives the end of the printed circuit board 13, as can be seen in FIG. 4. extensions 12 could be omitted or replaced by different shapes.
  • the housing may be provided with a bottom portion interposed between the two contact carrier strips 10 and provided with a housing receiving the end of the printed circuit board 13.
  • the housings 11 are in the form of slots made in the pitch of the contact members, in the contact carrier strip 10, these slots opening over the entire central face 10a of these strips.
  • these slots 11 in the form of a slot have a relatively reduced depth from the end 11a close to the extensions 12, with then a deeper clearance 11b followed by a new shallower part llc similar to the part 11a, after which a much larger clearance lld allows the tail of the contact member to come out.
  • the elastic contact member 14 has a fixing part 14a which conforms to the shapes of the housing parts 11a, 11b, 11c and 11d from which the contact tail 14e comes out.
  • each contact carrier strip 10 the extreme housing parts lld, 11'd are alternately of different depths, the parts lld being deeper than the parts 11'd, the difference in level being preferably normalized, for example, 1.27 mm, corresponding to the pitch of the housings 11.
  • the contacts 14 having corresponding shapes, we sees that the tails 14e, 14'e are arranged in the same way alternately.
  • the two contact carrier strips 10 are arranged in the housing, the passage of which is shaped in correspondence, so that the housings 11 of the two respective contact carrier strips 10 are not located one opposite the other. , to avoid a risk of electrical contact between two elastic contact members 14 facing each other.
  • This arrangement as can be seen in FIG. 2, also allows the use of identical contact carriers 10 for the same housing 1.
  • the housings 11 have, each time on a given face, ribs 11e extending from the face 10a, these ribs being intended to form narrowing allowing force engagement of the contacts 14 in the housings 11 and maintaining the contacts in these cells, these ribs 11 further applying the contact 14 against the face of the housing 11 opposite to that carrying the ribs and constituting the geometric reference face.
  • the contacts 14 have, from the immobilization part 14a, a first strand forming a descending branch 14f progressively moving away from the printed circuit board 13 to join, after an obtuse angle, a straight part 14g. At the end of the latter, an acute angle return forms a second strand 14h which therefore approximates the printed circuit board. 13 and has at its end an end portion 14i, the elbow 14j connecting the portions 14h, 14i forming the actual electrical contact area.
  • the cells 6 of the slides 5 have a bottom provided, on the rear side, with a first inclined ramp 6a continuing with a rectilinear bottom 6b, after which a return 6c forms a second part in the form of an inclined ramp 6d oriented this time downwards, unlike the ramp part 6a, the cell opening to the outside at the end of the ramp part 6d.
  • the dimensions are such that, when the slider 5 is in its rear open position, shown in FIG. 5, the first slider part 6a is distant from the strand 14f of the elastic contact member while the slide part 6c on the contrary retains the inclined strand 14h of the elastic contact member in a position remote from the printed circuit board 13, and this by counteracting the elastic return force of the contact which tends to want to bring the contact back 14d to the printed circuit board.
  • the slide When, by operating the corresponding slide 7, the slide is moved forward towards its closed position, as shown in FIG. 6, the second slide ramp 6d moves away from the branch 14h which can therefore approach the printed circuit board 13, while the first ramp 6a, coming into contact with the strand 14f, repels it by tilting it around the pivot point located in the area 14a to bring it closer to the circuit board 13 so that the area contact 14j is applied against the track (not shown) facing the printed circuit board 13.
  • the ramp part 6a brings the strand 14f even more towards the horizontal and further opens the angle between the strands 14f and 14g of the elastic contact member so that not only the part of the contact zone 14j is applied with more force against the track of the printed circuit board 13 but also that a modification of the length of the member 14, which causes a sliding friction of the zone 14j on the printed circuit board on a path l between the point a where it first came to apply against the card and the point b which corresponds to the extreme closing contact position, this movement thus ensuring self-cleaning of the contact surfaces.
  • an elastic contact member 15 has a strand 15a extending in a rectilinear manner and substantially parallel to the printed circuit board 13 then, after an elbow following the first branch 15a, a second branch 15b returning substantially parallel to the branch 15a, this branch 15b continuing at one end 15c.
  • the slider 16 similar to the slider 5, has a first part of the slider forming a ramp 16a which is in contact with the end starting to curve from the branch 15a.
  • the cell in which the branches 15a and 15b of the contact member extend also has a boss 16b which, in the open position shown in the lower part of FIG.
  • the two strips 7 are put in place in the grooves 2 of the housing 1 so that the openings in the grooves 8 are arranged in line with the grooves 4.
  • the two slides 5 are brought into the housing 1 up to 'in that the pins 9, crossing the channels 4, enter the grooves 8. It is thus possible to move the strips longitudinally and to move, accordingly, the slides transversely.
  • the two contact carriers 10, fitted with their contact members 14, are put in place by the rear face of the housing, the strips 10 also having dovetail extensions penetrating into the grooves. res 3 following the slides 5.
  • the mobile parts of the contacts 14 are housed in the cells 6 of the slides 5.
  • the contact carrier strips 10, applied against the shoulders lg, are held in place by bonding, ultrasonic welding or any other means.
  • the contact member consists of a wire and differs from the contact member 14 by the fact that the free end and 14i continues with a bent return / forming an ascending branch 14k similar to the end branch 14i , an elbow 141 forming the actual contact point and a free downward branch 14m coming to cooperate with the ramp 6d in the same way as the branch 14h.
  • the point of contact 141 should normally be located at a level slightly higher or at least equal to that of point 14j so that, when pressed, it is certain that it comes into contact with the track.

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)
  • Combinations Of Printed Boards (AREA)
  • Multi-Conductor Connections (AREA)
EP85401791A 1984-09-18 1985-09-17 Verbindungseinrichtungen für gedruckte Schaltungen Expired EP0178974B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85401791T ATE34887T1 (de) 1984-09-18 1985-09-17 Verbindungseinrichtungen fuer gedruckte schaltungen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8414250A FR2570550B1 (fr) 1984-09-18 1984-09-18 Perfectionnements aux dispositifs de connexion pour cartes de circuits imprimes
FR8414250 1984-09-18

Publications (2)

Publication Number Publication Date
EP0178974A1 true EP0178974A1 (de) 1986-04-23
EP0178974B1 EP0178974B1 (de) 1988-06-01

Family

ID=9307797

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85401791A Expired EP0178974B1 (de) 1984-09-18 1985-09-17 Verbindungseinrichtungen für gedruckte Schaltungen

Country Status (6)

Country Link
US (1) US4669795A (de)
EP (1) EP0178974B1 (de)
JP (1) JPS6177289A (de)
AT (1) ATE34887T1 (de)
DE (1) DE3563156D1 (de)
FR (1) FR2570550B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0307521A1 (de) * 1987-09-15 1989-03-22 E.I. Du Pont De Nemours And Company Ohne Einführkraft kontaktierbarer Steckverbinder
EP0505744A3 (en) * 1991-03-28 1993-01-13 Richard Hirschmann Gmbh & Co. Connector for a printed circuit board

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU600026B2 (en) * 1987-09-16 1990-08-02 E.I. Du Pont De Nemours And Company Zero insertion force connector
EP0979542B1 (de) * 1996-06-28 2003-03-26 Synapse Technologies, INC. Mechanismus mit knopf und schwalbenschwanz zum aktivieren eines verbinders
JP2006085903A (ja) * 2004-08-19 2006-03-30 Fujitsu Component Ltd 平面状配線部材用コンタクト部材及びこれを有するコネクタ
US7641777B2 (en) * 2004-09-07 2010-01-05 Roche Diagnostics Operations, Inc. Biological testing system
JP2014229377A (ja) * 2013-05-20 2014-12-08 矢崎総業株式会社 コネクタ
CN110024229B (zh) * 2016-11-30 2020-11-13 古河电气工业株式会社 电连接匣
JP7303985B2 (ja) * 2019-12-02 2023-07-06 株式会社オートネットワーク技術研究所 コネクタ
JP7303984B2 (ja) * 2019-12-02 2023-07-06 株式会社オートネットワーク技術研究所 カードエッジコネクタ

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4169644A (en) * 1976-03-11 1979-10-02 Bonhomme F R Electrical connection devices

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB950104A (de) * 1960-11-04 1900-01-01
US3553630A (en) * 1968-01-29 1971-01-05 Elco Corp Low insertion force connector
US3526869A (en) * 1969-01-21 1970-09-01 Itt Cam actuated printed circuit board connector
JPS49105997A (de) * 1973-02-19 1974-10-07
FR2310061A1 (fr) * 1975-04-28 1976-11-26 Bonhomme F R Perfectionnements aux organes de contact elastiquement deformables, pour connecteurs de cartes a circuits imprimes, et aux connecteurs munis de tels organes
FR2397769A1 (fr) * 1977-07-12 1979-02-09 Bonhomme F R Perfectionnements aux dispositifs de connexion pour cartes a circuits imprimes
GB1549201A (en) * 1976-07-16 1979-08-01 Ryford Ltd Edge connectors
US4159154A (en) * 1978-04-10 1979-06-26 International Telephone And Telegraph Corporation Zero insertion force connector
US4553803A (en) * 1984-05-07 1985-11-19 Gte Products Corporation Electrical connector

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4169644A (en) * 1976-03-11 1979-10-02 Bonhomme F R Electrical connection devices

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0307521A1 (de) * 1987-09-15 1989-03-22 E.I. Du Pont De Nemours And Company Ohne Einführkraft kontaktierbarer Steckverbinder
EP0505744A3 (en) * 1991-03-28 1993-01-13 Richard Hirschmann Gmbh & Co. Connector for a printed circuit board

Also Published As

Publication number Publication date
US4669795A (en) 1987-06-02
FR2570550B1 (fr) 1986-12-05
ATE34887T1 (de) 1988-06-15
EP0178974B1 (de) 1988-06-01
JPS6177289A (ja) 1986-04-19
FR2570550A1 (fr) 1986-03-21
DE3563156D1 (en) 1988-07-07

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