EP0132070B1 - Connecteur électrique de bord - Google Patents

Connecteur électrique de bord Download PDF

Info

Publication number
EP0132070B1
EP0132070B1 EP19840304419 EP84304419A EP0132070B1 EP 0132070 B1 EP0132070 B1 EP 0132070B1 EP 19840304419 EP19840304419 EP 19840304419 EP 84304419 A EP84304419 A EP 84304419A EP 0132070 B1 EP0132070 B1 EP 0132070B1
Authority
EP
European Patent Office
Prior art keywords
contact
slot
cavity
substrate
condition
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
EP19840304419
Other languages
German (de)
English (en)
Other versions
EP0132070A2 (fr
EP0132070A3 (en
Inventor
Juergen Ryll
Wolfgang Hoschek
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 EP0132070A2 publication Critical patent/EP0132070A2/fr
Publication of EP0132070A3 publication Critical patent/EP0132070A3/en
Application granted granted Critical
Publication of EP0132070B1 publication Critical patent/EP0132070B1/fr
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
    • H01R12/87—Coupling devices connected with low or zero insertion force contact pressure producing means, contacts activated after insertion of printed circuits or like structures acting automatically by insertion of rigid printed or like structures

Definitions

  • This invention relates to an electrical edge connector for a printed circuit board, ceramic substrate, or the like, and is particularly concerned with a low insertion force for the board or substrate.
  • an edge connector for a printed circuit board or substrate comprising an insulating housing formed with a contact-receiving through cavity and a slot for receiving an edge of the board or substrate traversing the cavity at one end, a contact in the cavity having a pair of divergent spring arms with the free ends presenting contact surfaces disposed at opposite sides of the slot for engaging opposite sides of the board or substrate, wherein the contact is moveable within the cavity in the insertion direction of the board or substrate between a first condition in which the contact surfaces are disposed outside opposite sides of the slot, and a second condition in which they are disposed within the slot width, and wherein the contact has a portion disposed between the spring arms which, in the first condition, projects into the slot whereby engagement of the connector with the board or substrate edge registers the projecting portion with the substrate edge to effect movement of the projecting portion rearwardly of the slot and movement of the contact to the second position, the cavity being of reduced width rearwardly of the slot whereby on movement of the contact between the
  • said biasing means comprises a coil spring.
  • the present invention is intended to provide biasing means which do not require the use of an additional metal part and which are economical of the contact material.
  • said projecting portion is formed with a spring arm having an end portion engaging a ramp surface formed on a wall of the cavity. Flexure of the spring arm against the ramp surface serving to bias the contact towards the first condition.
  • US-A-4 118 094 discloses a low, or zero insertion force printed circuit edge connector having spring means formed integrally with the contacts of the connector, for biasing the contact spring arms towards said first condition.
  • the spring biasing means are in the form of bellows springs, which are uneconomical of contact material.
  • Each contact is provided with two such bellows springs and comprises two parts which are riveted together and are carried by a separate insulating member.
  • a contact according to an embodiment of the invention may comprise a channel shaped body, the sides of the channel being extended at one end to define the spring arms, the base of the channel-shaped body being formed with said projecting portion which extends forwardly between the arms to a position rearwardly of the contact surfaces. Said projecting portion, is there folded back at a rearward inclination to provide said spring arm and said end portion being spaced from the base of the channel between the channel sides.
  • stops are formed in the cavity to limit movement of the contact between the first and second conditions.
  • Figure 1 is an elevation of a connector housing from one side
  • Figure 2 is a section taken on the line 2-2 of figure 1;
  • Figure 3 is an elevation of the connector of figure 1 from the opposite side with an end cavity shown in section;
  • Figure 4 is a plan view of the connector of figure 1;
  • Figure 5 is a side elevation of a contact for the connector of figures 1 to 4, but to an enlarged scale;
  • Figure 6 is a plan view of the contact of figure 5;
  • Figure 7 is a sectional view of a cavity of the connector viewed from an opposite direction to that of figure 2, and containing a contact according to figures 5 & 6, and in an initial condition of engagement with a substrate;
  • Figure 8 is a section taken on the line 8-8 of figure 7, viewed in the direction of the arrows;
  • Figure 9 is a view similar to that of figure 7 but with the substrate fully engaged with the connector, and
  • Figure 10 is a view similar to that of Figure 8 but with the contact in a condition similar to that of figure 9.
  • the connector housing of figures 1 to 4 is formed of resilient plastics insulating material as a unitary molding, and comprises a connector body portion 1 of generally rectangular slab-like form having at one major face, a mounting and retention section 2.
  • the body 1 is formed with five through cavities, 3 arranged in a row and with a slot 4 for receiving a substrate edge extending transversely of the cavities 3 between opposite sides of the body 1, at a lower end as seen in figure 2.
  • the body 1 is formed with a flap 5 extending from side to side of the body across all of the cavities 3 and integral with the body 1 at a hinge 6 at a middle portion of the body between upper and lower ends thereof.
  • the flap 5, at its upper edge is formed with a series of latch projections 7, each having a latch aperture 8 and arranged to project transversely over walls 9, separating the cavities 3, the apertures 8 engaging projection 10 formed on walls 9 to secure the flap 5 in the position shown.
  • the flap 5 with the latch projecting 7 disengaged from wall projections 10, is moveable by bending at the hinge 6 between an open position at 90 degrees counterclockwise from the position shown, to the closed position shown.
  • the flap 5 is formed adjacent the hinge 6, and internally of the cavities 3, with a series of inwardly projecting shoulders 11, one to each cavity 3, the shoulders having downwardly facing shoulder surfaces for contact retention purposes as will be described later in connection with figures 7 to 10.
  • Each cavity 3 is formed substantially at the level of hinge 6 and on one of the cavity sides bridging the slot 4 with an inward projection 12 having upper and lower ramp surfaces 13, 14 for camming engagement with a portion of a contact as will be described later.
  • These sides of each of the cavities are formed adjacent the other pair of sides with shallow projections defining upward facing shoulders 17 slightly above the level of the slot 4, which serve to limit contact insertion.
  • the other pair of sides, below the shoulders 17 diverge to a lower cavity portion surrounding the slot 4, of enlarged width, as seen in figure 2.
  • the mounting section 2 comprises a pair of spaced latch arms 18 depending from a bridge portion 19 stood away from the body 1.
  • the arms 18 are of channel form open sides of the channels facing outwards as seen in figures 1 and 4, and lower ends of the channels being closed by latch portions 20 having upper and lower ramp surfaces. It will be understood that the lower ends of the arms can be resiliently flexed together to enable engagement or disengagement of the latch projections 20 with complementary means on a fixture for releasably securing the connector to the fixture.
  • the contact of figures 5 and 6 comprises a channel shaped middle portion 21 having at one end a wire connecting section 22 of conventional form comprising a U-shaped wire crimp ferrule 23 and insulation support ferrule 24 extending from a carrier strip 25.
  • a wire connecting section 22 of conventional form comprising a U-shaped wire crimp ferrule 23 and insulation support ferrule 24 extending from a carrier strip 25.
  • opposite sides of the channel are extended in divergent manner, as spring arms 26, to free ends which are turned inwards in arcuate manner to present opposed arcuate contact portions 27.
  • the spring arms 26 are progressively reduced in width towards the free ends.
  • the base of the channel shaped portion 21 is formed between the arms 26 with an extension 28 which, as seen in figure 6, is reduced in width forwardly and is stiffened by a central embossment 29.
  • the extension 28 is further extended by a bent back portion 30 which extends rearwardly and upwardly between the arms 26 to project at its free end 31 above the channel portion 21.
  • the free end 31 is bent down in arcuate manner to present an upwardly convex engagement surface.
  • the base of the channel portion 21 is formed with a downwardly and rearwardly extending retention latch 32 pushed out of an aperture in the base behind the embossment 29.
  • the contact of figures 5 and 6 is severed from the carrier strip 25 and crimped to a stripped wire end 33 in conventional manner to present a terminated lead for assembly to the connector housing of figures 1 to 4 as shown in figures 7 to 10.
  • the mounting section 2 of the connector housing is not shown.
  • the flap 5 is moved to an open condition so that the shoulders 11 are clear of the cavities 3,
  • the contacts are inserted into respective cavities 3, leading ends of the contact springs 26 initially engaging opposite sides of the cavities 3 below the hinge 6 and thereby flexed inwardly to allow passage into the cavities until the retention latch 32 enters the groove 15 and engages the shoulder 16 to secure the contact against withdrawal from the housing.
  • the bent back portion 30 engages the transition edge between the ramp surfaces 13 and 14 to flex the portion 30 inwardly until its free end 31 engages the ramp surface 14.
  • the spring arms 26 are constrained inwardly by the cavity walls, and shoulders 34 at the lower end of the channel section 21 on opposite sides of the extension are spaced above the housing shoulders 17.
  • the contact is thus capable of further downward movement through the cavity 3 and the flexure of the portion 30 against the ramp surface 14 exerts a downward force on the contact to move it downwardly until the shoulders 34 and 17 engage to resist further downward movement.
  • the contact is now in the condition of figures 7 and 8.
  • the connector can be assembled to a substrate 35 by entering the edge of the substrate 35 into the slot 4 between the contact portions 27 until the edge of the substrate 35 engages the forward lower end of the contact extension 28.
  • the contact portions 27 are clear of the slot and are not engaged by the substrate 35, so that risk of damage of the contact surfaces by sharp edges of the substrate 35 and by abrasion is avoided.
  • Further movement of the substrate 35 into the slot 4 drives the contact upwardly or rearwardly in the cavity 3, the portion 30 being flexed inwardly by the ramp 14 and the spring arms 26 being flexed inwardly by being drawn into the cavity portion of reduced width.
  • the contact portions 27 are thus urged against opposite sides of the substrate, as shown in figure 9 to exert contact force.
  • the substrate 35 is suitably supported in a fixture, not shown, having means complementary to the latch arms of the mounting section 2 of the connector so that the latch arms 18 at their ends 20 engage the complementary means in a snap fit releasably to secure the connector in the condition of figures 9 and 10.
  • the latch arms 18 may be flexed together, and the connector withdrawn from the substrate 35 by upward movement of the housing in the figure 9 position to that of figures 7 and 8.
  • the spring portion 30 and the engagement of its free end 31 with the ramp serves to drive the contact downwards relative to the housing so that the contact portions 27 flex apart from the substrate to the figure 7 condition before the connector is withdrawn from the substrate 35. In this way abrasion of the contact portions 27 with the substrate 35 and engagement with any sharp edges is avoided.

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)

Claims (3)

  1. Connecteur de bord pour une plaquette ou un substrat à circuits imprimés, comprenant un boîtier isolant (1) pourvu d'une cavité de traversée (3), destinée à recevoir un contact, et d'une fente (4) destinée à recevoir un bord de la plaquette ou du substrat (35) traversant la cavité à une extrémité, un contact (21, 22) dans la cavité comportant deux bras élastiques divergents (26), dont les extrémités libres présentent des surfaces de contact (27) disposées de part et d'autre de la fente (4), pour attaquer des côtés opposés de la plaquette ou du substrat (35), dans lequel le contact (21, 22) est mobile dans la cavité (3) dans le sens d'insertion de la plaquette ou du substrat (35) entre un premier état dans lequel les surfaces de contact (27) sont disposées à l'extérieur des côtés opposés de la fente (4) et un second état dans lequel elles sont disposées dans la largeur de la fente (4), et dans lequel le contact (21, 22) comporte une partie (28) disposée entre les bras élastiques (26) qui, dans le premier état, s'étend dans la fente (4), de sorte que 1'engagement du connecteur avec le bord de la plaquette ou du substrat (35) fait coïncider la partie saillante (28) avec le bord du substrat pour provoquer un déplacement de la partie saillante (28) vers l'arrière de la fente (4), c'est-à-dire dans le sens d'insertion du substrat, et un déplacement du contact (21, 22) dans le second état, la cavité (3) étant d'une largeur réduite, vers l'arrière de la fente (4), de sorte que lors d'un déplacement du contact (21, 22) entre le premier et le second état, les bras élastiques (26) sont forcés par la partie de cavité de largeur réduite à se rapprocher l'un de l'autre pour introduire les surfaces de contact (27) dans la fente (4), un moyen (30) étant prévu pour solliciter le contact (21, 22) vers son premier état, caractérisé en ce que la partie saillante (28) est pourvue d'un bras élastique (30) comportant une partie d'extrémité (31) attaquant une surface de rampe (14) formée sur une paroi de la cavité (3), la flexion du bras élastique (30) contre la surface de rampe (14) servant à solliciter le contact (21, 22) vers le premier état.
  2. Connecteur suivant la revendication 1, caractérisé en ce que des épaulements (11, 16, l7) sont formés dans la cavité (3) pour limiter le déplacement du contact (21, 22) entre le premier et le second état.
  3. Connecteur suivant la revendication 1 ou 2, caractérisé en ce que le contact comprend un corps profilé en U (21), les côtés du profilé en U étant prolongés à une extrémité pour définir les bras élastiques (26), la base du corps profilé en U (21) étant pourvue de la partie saillante (28) qui s'étend vers l'avant entre les bras (26) vers une position située en arrière des surfaces de contact (27), la partie saillante (28) étant repliée vers une position inclinée vers l'arrière pour former le bras élastique (30), la partie d'extrémité (31) étant espacée de la base du profilé en U, entre les côtés de ce profilé.
EP19840304419 1983-07-14 1984-06-28 Connecteur électrique de bord Expired - Lifetime EP0132070B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8319019 1983-07-14
GB8319019A GB8319019D0 (en) 1983-07-14 1983-07-14 Electrical edge connector

Publications (3)

Publication Number Publication Date
EP0132070A2 EP0132070A2 (fr) 1985-01-23
EP0132070A3 EP0132070A3 (en) 1987-09-02
EP0132070B1 true EP0132070B1 (fr) 1991-02-20

Family

ID=10545693

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840304419 Expired - Lifetime EP0132070B1 (fr) 1983-07-14 1984-06-28 Connecteur électrique de bord

Country Status (8)

Country Link
EP (1) EP0132070B1 (fr)
JP (1) JPS6039785A (fr)
AU (1) AU571241B2 (fr)
BR (1) BR8403477A (fr)
DE (1) DE3484118D1 (fr)
ES (1) ES290657Y (fr)
GB (1) GB8319019D0 (fr)
MX (1) MX156828A (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8500587A (nl) * 1985-03-01 1986-10-01 Du Pont Nederland Kaartleeshouder.
DE8816132U1 (de) * 1988-12-28 1989-02-16 Robert Bosch Gmbh, 7000 Stuttgart Kontaktelement für die elektrische Verbindung eines Leiters mit mindestens einem Kontaktflecken auf einer Leiterplatte
JP2822852B2 (ja) * 1993-06-30 1998-11-11 住友電装株式会社 カードエッジコネクタ
DE102005040952A1 (de) * 2005-08-30 2007-03-08 Kostal Kontakt Systeme Gmbh Elektrischer Nullkraftsteckverbinder
JP6741200B2 (ja) * 2016-11-28 2020-08-19 Smk株式会社 コンタクト及びそれを使用したコネクタ

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB885040A (en) * 1959-04-02 1961-12-20 Gen Electric Co Ltd Improvements in or relating to electrical socket connectors
GB1039397A (en) * 1964-06-01 1966-08-17 Gerard Benoit Improvements in or relating to electrical connectors
GB1177193A (en) * 1967-07-14 1970-01-07 Amp Inc Electrical Contact Element for a Printed Circuit Edge Connector and a Printed Circuit Edge Connector Assembly
JPS4919074B1 (fr) * 1967-09-02 1974-05-15
US4118094A (en) * 1977-03-31 1978-10-03 Trw Inc. Zero-entry force connector
FR2395676A1 (fr) * 1977-06-23 1979-01-19 Doloise Metallurgique Connecteur pour carte imprimee
JPS608377Y2 (ja) * 1980-02-29 1985-03-25 カシオ計算機株式会社 プリント基板接続装置
US4348071A (en) * 1980-06-11 1982-09-07 General Motors Corporation Printed circuit connector

Also Published As

Publication number Publication date
ES290657U (es) 1986-04-16
MX156828A (es) 1988-10-05
EP0132070A2 (fr) 1985-01-23
AU3040184A (en) 1985-01-17
AU571241B2 (en) 1988-04-14
JPH053716B2 (fr) 1993-01-18
JPS6039785A (ja) 1985-03-01
DE3484118D1 (de) 1991-03-28
EP0132070A3 (en) 1987-09-02
ES290657Y (es) 1986-12-01
GB8319019D0 (en) 1983-08-17
BR8403477A (pt) 1985-06-25

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