CN1047941A

CN1047941A - Circuit panel socket with cloverleaf contact

Info

Publication number: CN1047941A
Application number: CN90103972A
Authority: CN
Inventors: 蒂莫菲·布赖恩·比尔曼; 罗杰·李·思拉什
Original assignee: AMP Inc
Current assignee: TE Connectivity Corp
Priority date: 1989-06-02
Filing date: 1990-06-01
Publication date: 1990-12-19
Also published as: ES2083395T3; DE69024535D1; EP0400378A3; KR910002047A; DE69024535T2; EP0400378B1; EP0400378A2; JP2660450B2; KR100190795B1; ATE132661T1; JPH0322380A

Abstract

A kind of monolithic inline memory module socket adopts the edge punching press contactor that is contained in the insulation shell.Each binding post has the opposed jig arm of stretching on a pair of, and there is an annular section at the middle part, and its top tilts downwards inwards, constitutes the contact, makes most of strain of jig arm be created in the jig arm part of inclining here.Stretch out a pillar in the matrix central authorities, with the housing ribs engagement in the central spine, central spine is provided with along wiring board receiving channel bottom surface.Binding post inserts the cavity that traverses the wiring board receiving channel from the bottom surface, pillar and central spine make the binding post location.The housing two ends protrude upward the wiring board guide, and the projection of housing elastic arm makes the module stability in the socket.

Description

Circuit panel socket with cloverleaf contact

The present invention relates to a kind of electric connector and a kind of be applicable to wiring board on the binding post of this electric connector connected of conductive lead wire, relate in particular to and a kind ofly realize electric interconnective electric connector socket with a monolithic direct insertion (in-line) memory module.

The monolithic inline memory module is represented the unit of the direct insertion electronic unit of monolithic of a kind of high density, low clearance, for example dynamic random access memory integrating circuit component unit.Many this electronic units can the straight cutting form be contained on the wiring board, and it is highly only a little more than these parts itself.These wiring boards can be contained in the subboard of a printed circuit board successively, and then subboard is contained on the printed circuit board mother board.Spacing between the adjacent subboard can only be a bit larger tham the height of each wiring board or monolithic inline memory module.

The monolithic inline memory module is installed to a method on the subboard, can be to adopt pin shape contact near the lead-in wire the edge of wiring board, and these lead-in wire pin shape contacts are received on the contact of traditional printed circuit board (PCB) then, for example the small spring contact.

Another method of having used is, adopts monolithic inline memory module socket, be plated in the monolithic inline memory module in the edge of wiring board on lead-in wire realize that disassembling is electrically connected.Binding post in this socket is by 4,557, and No. 548 and 4,558, No. 912 U.S. Patent Publications.4,781, No. 612 U.S. Patent Publications the details of insulation shell of a kind of and this binding post adapted.The disclosed socket of these patents is applicable to the pin at wiring board edge or the inline memory module that lead-in wire centre-to-centre spacing is 0.100 inch.Because the binding post of using in this socket is punching press and is shaped, thereby the width of binding post generally hinders centreline spacing interconnecting hour.The binding post that another monolithic inline memory module socket does not adopt punching press and is shaped, but (edge-stamped) binding post of employing edge punching press, for example, 4,737, No. 120 U.S. Patent Publications a kind of electric connector that is applicable to a monolithic inline memory module, between the pin on its binding post and the wiring board, realize a kind of interconnecting of mating force of not having, wiring board inserts along a certain angle, then by cam orientation, a latch is arranged on the insulation shell of connector, wiring board is determined in a certain position.The connector of another kind of no mating force is disclosed in 4,575, in No. 172 United States Patent (USP)s.More than contact terminal in each patent be the edge punching press, adopting the centreline spacing grade that socket was suitable for of this binding post is 0.050 inch.

In the structure of these no mating forces, the CONTACT WITH FRICTION between the lead-in wire on contact and the printed circuit board (PCB) is limited.As everyone knows, wishing has enough big CONTACT WITH FRICTION power, so as to remove on the contact terminal printed substrate goes between or pin on dirt.4,725, No. 250 U.S. Patent Publications a kind of socket connector, can produce enough big CONTACT WITH FRICTION effect between the conductive lead wire of its binding post and the wiring board part, this connector also comprises the binding post of edge punching press.This connector shown in 4,725, No. 250 United States Patent (USP)s is applicable to the monolithic inline memory module of standard.But the not all monolithic inline memory module that can buy from the market is all according to the acceptable standard manufacture of this module, for example JEDEC standard.In the non-standard monolithic inline memory module wiring board of being produced, near the lead portion the wiring board edge is shorter than the desired size of industrial the recognized standard.4,725, disclosed the sort of connector is not suitable for the wiring board with short leg contact portion in No. 250 United States Patent (USP)s, because set up the reason of height of the jig arm of enough CONTACT WITH FRICTION energetically in the sort of connector, makes contact to finish in the edge near wiring board.

Since some module manufactories can not make according to the requirement of JEDEC the module thickness tolerance remain on ± 0.003 inch scope within, also caused the situation that departs from the JEDEC standard.In fact, ± 0.008 inch tolerance is more real, but such tolerance makes the design of binding post complicated, because it needs a bigger deflection scope.The lengthening binding post is inappropriate, because must take into account the desired high density of SIMM, nor can obtain contact near module edge.

Not only begun inconsistent monolithic inline memory module to occur, and the additional basic monolithic inline memory module socket that amasss into circuit element is housed has in the circuit board also just come into operation.In fact, be added on the module, make the height of wiring board increase always owing to more and more amass into circuit card.These modules are meant the SAM ' formula module (special purpose module) of utilizing basic SIMM method.For example, adopt the height of the plate of SIMM mode now to reach the 2.0-3.5 inch.The increase of these wiring board height has increased the difficulty of stablizing these elements in the socket of standard, because the traditional wiring board guide in this socket does not have enough height to press from both sides that part of wiring board of contiguous its upper end, position.The present invention not only proposes the device of the higher wiring board of a kind of Metacentre Height, and adopted near a kind of binding post of electrically contacting of being suitable for the circuit panel edges realizing, therefore, this friction (slide plate) connector with sufficient force can with off-gauge monolithic inline memory module wiring board adapted.

Conductive lead wire pin on a kind of at least one side that is used for a wiring board (for example monolithic inline memory module) is set up the electric connector or the socket that electrically contact and has been disclosed.This connector has many binding posts in the insulation shell that are contained in, and these binding posts are to be stamped to form with a kind of spring metal material edge, thereby this connector can reach less centreline spacing.Each binding post has a pair of jig arm of putting relatively that protrudes upward from matrix, and in the time of in the middle of a wiring board being injected two jig arm, they just produce deflection.There is an annular section middle part between the two ends that extends upward part of each jig arm.The downward extension of jig arm is positioned at the inside of prolonging part, and the top end of contiguous downward extension has a contact site.Binding post is contained in the insulation shell, housing has a groove that inserts the upward opening of usefulness for wiring board at least, there are many cavitys on both sides along this groove, binding post just is contained in these housing cavitys, and the contact site on its downward arm extend within the wiring board insertion groove.In this most preferred embodiment, binding post goes from following reeve housing.Each binding post has a pillar that extends upwardly out, it can be located in the central spine and binding post is located in housing, and it still is the latch of a wiring board, when wiring board injects the wiring board receiving channel when too many, wiring board is with regard to by last it and stop.

Fig. 1 is the perspective view that constitutes the socket of this most preferred embodiment of the present invention, and it is connected with the edge of a monolithic inline memory module circuit, and in the drawings, module is drawn out of the top that is shown in a wiring board receiving channel.

Fig. 2 is a view of the binding post in this socket, shown in the figure when wiring board injects between the two relative intermediate plates of binding post, the deflection profile (dotted line is represented) of this binding post that draws by limited element analysis technique.

Fig. 3 is the cutaway view of getting along the 3-3 line among Fig. 1, and it is expressed the position of Socket casing middle connecting terminal and is positioned at the inner face of the wiring board strutting piece of Socket casing end.

Fig. 4 is a view similar with Fig. 3, and it illustrates two wiring boards that inject in the binding post, and the deflection profile of the elastic wall that is used to stablize this two bar printings circuit in the wiring board strutting piece is shown.

Fig. 5 represents the perspective view of the Socket casing middle part of above-mentioned insulation, and housing is by partly cut-away, to express the enclosure interior structure between the wire-pressed terminal.

Fig. 6 is the partial view of similar Fig. 5, but expression is the section of being got by this place's housing inner chamber except that behind the lower connecting terminal.

Fig. 7 is an alternative embodiment of the invention, and it has the binding post of same configuration, but different wiring board supporting constructions is arranged.

Monolithic inline memory module socket or connector 2 adopts many binding posts 10 in the insulation shell 20 that are contained in, and the conductive lead wire 6 that is used on the edge 4a with wiring board 4 is connected.This connector 2 is suitable for and wiring board 4 adapteds that many conductive lead wires are arranged, and the center line of the conductive lead wire 6 on the 4a that keeps to the side on this wiring board and the centreline spacing of adjacent line terminals are 0.050 inch.Binding post 10 usefulness elastic sheet metal punching presses are come out, and its material for example can adopt copper beryllium alloy or phosphor bronze.Each binding post 10 be applicable to wiring board on the conductive lead wire of at least one side realize electrically contacting in its edge.

Each binding post 10 has a pair of jig arm of upwards stretching relatively from matrix 14 12, pillar 16 center from matrix 14 between two relative jig arm extends upwardly out, one is extended from the matrix bottom surface with pillar 16 contact feet 18 point-blank, be suitable for its on socket 2 is housed printed circuit board (PCB) realize being electrically connected.

When injecting a wiring board 4 between two jig arm, two relative jig arm 12 can strain.Matrix 14 extends between two jig arm 12, and each jig arm 12 extends upward from an end of matrix 14 respectively, this upwardly extending part 12a links to each other with matrix 14 and tilts inwards, the jig arm part 12b of Qing Xieing extends downwards from the top 12c that extends upward part inwards, and it is an oblique with the sloping portion inwards that extends upward part 12a.Little loop section 12d who extends inwards be positioned at (each) relatively jig arm 12 on prolong between the top and bottom of part 12a.In the preferred embodiment of this binding post, that part of jig arm between matrix 14 and the ring portion 12d is tapered.The height and position of the ring portion 12d of Yan Shening is between the end of matrix 14 and downward extension 12b inwards.In fact, in this most preferred embodiment of the present invention, the position of the ring portion 12d that this extends inwards is lower than downward extension 12b.The ring portion 12d of Yan Shening takes the shape of the letter U usually inwards, and the back bending of ring portion 12c is positioned at the inward flange of two relative jig arm 12, and the opening portion of U-loop outward.Two parallel edges of the 12c of U-loop portion are roughly parallel to matrix 14, and the curved shape of back bending place.Contact 12e is positioned at the position of leaning on the lining most of downward extension 12b, near the termination of each jig arm 12, and above ring portion 12d.As shown in Figure 2, the structure of two relative jig arm 12 makes the main crushed element of jig arm 12 be created in the part between ring portion 12d, matrix 14 and matrix and this ring portion.Under the situation that does not increase jig arm 12 height, can obtain the big strain at 12e place, contact.

Pillar 16 has a barb, and 16 protrude upward from the matrix 14 between two relative jig arm 12, and in fact, pillar 16 is between two contact point 12e on two jig arm 12.The height of pillar 16 upper surfaces is identical substantially with the height of ring portion 12d.

Insulation shell 20 can form with the general engineering plastics molding that is suitable for doing electrical cnnector.At housing 20 each end one wiring board guide or strutting piece 30 are arranged all, the general rectangular section of the part between them.In this most preferred embodiment of the present invention, two wiring board receiving channels 22 extend between two wiring board guides 30, and opening is upwards opened on the upper surface 20a of insulation shell 20.Two grooves 22 are parallel to each other.Many cavitys 24 also opening are upwards opened on the upper surface 20a of insulation shell 20, and are communicated with a corresponding wiring board receiving channel 22 of this double-row type connector that constitutes most preferred embodiment of the present invention, and 24 of each cavitys are communicated with a groove 22.Each cavity 24 on insulation shell 20 and the bottom surface all be opening, and on the two sides of the groove 22 of each self-corresponding upper shed, extend relatively.Middle part backbone 26 comprises that part of insulator 20 of the below that is positioned at every wiring board receiving channel 22.As shown in Figure 5, middle part backbone 26 constitutes the solid section of housing 20 between cavity 24.Cavity 24 and groove 22 crosscut mutually that has each housing ribs 28, rib 28 is made of that a part of central spinal column 26 across each cavity.These housing ribs 28 are extended downwards from the lower plane of groove 22, and the lower surface of groove 22 constitutes the upper surface of middle part backbone 26, and a hole 26a is arranged between two housing ribs 28.Each cavity 24 is not only at the upper surface 20a of insulation shell but also in lower surface 20b upper shed, and extends for 28 times in housing ribs.

There are wiring board guide or strutting piece 32 in the two ends of insulation shell 20, and each guide extends upward from the upper surface 20a of insulation shell 20, and it is 30a to inner surface.Circuit board slot 32 with open inner ends is relative and is communicated with each wiring board receiving channel 22 that they also extend to the wiring board receiving channel up more than 22 inwardly.The clamping section of wiring board is ridge shape 34, and they constitute the constriction of wiring board receiving channel 32, and separates each other in the open upper end of wiring board receiving channel 22.Groove or loose groove 36 are positioned on the relative two sides of two grooves 32, are used for determining elastic wall 38.In this most preferred embodiment of the present invention, these two elastic walls are as the part of wiring board strutting piece 30 and couple together.In this most preferred embodiment of the present invention, a central cavity 40 is arranged at the bottom of road along the line plate support, and near the loose groove 36 the ridge 34 extends upward from these 40s, hole.

Binding post 10 is to inject corresponding cavity 24 from the bottom of insulation shell 20.The distance that the contact point 12e of relative jig arm 12 separates is less than the width of central spinal column in the cavity, and in other words, the distance between the two contact 12e is less than distance between two outer surfaces of two ribs 28 in the cavity 22.When binding post 10 inserts in the cavity 24, two relative jig arm 12 are owing to outwards open with rib 28 engagements, binding post continues to stretch into cavity 24 from below makes two arms of its fall home its original position of rebounding, thereby the protuberance of interior curved boom 12b enters the groove 22 from two relative side, that is, at this moment contact point 12e is arranged in terminal block receiving channel 22.The pillar 16 that extends upwardly out from the matrix 14 of binding post 10 is centerings with wiring board receiving channel 22, and the upper surface of each pillar 16 exceeds the bottom surface of this cavity.Pillar or hangnail 16 enter among two aperture 16a between the housing ribs 28, and this binding post because pillar leans against on these two ribs 28 with correspondence is positioned on the central spinal column 26.

When injecting a wiring board 4 in the wiring board receiving channel 22, conductive lead wire, the contact zone that promptly is positioned at the conductive lead wire end of close wiring board edge 4a just meshes with the descender 12b of relative two jig arm 12, and make these two and the outside deflection of jig arm part 12b of stretching inwards downwards, so two contact point 12e just contact with these conductive lead wires near wiring board edge 4a.The edge 4a of wiring board also is close to pillar, thereby guarantees that contact point 12e contacts with the conductive lead wire at close this edge really.Enough big contact force is arranged between these contacts and conductive lead wire.When adopting a non-standard monolithic in-line arrangement memory module in this socket, this engagement is effective especially.

The configuration of wiring board strutting piece 30 is suitable for supporting and stablizing high monolithic inline memory module.When in the groove 32 that wiring board injects with receiving slit 22 is aimed at, elastic wall 38 just tilts, and at this moment, two ridges of formation narrow 34 just choke the side of wiring board 4, and these two ridges make the wiring board aligning and are fixed in the socket 2.

As shown in Figure 7, can adopt another kind of wiring board support guide member 130, it has outstanding jig arm 138, near 138 top ends a wiring board pinched protrusion portion 134 is arranged.Therefore, Fig. 7 explanation, binding post 10 can be used for the structure of other form, not only can be used for having in the structure of this wiring board support guide spare 30 of this most preferred embodiment of the present invention.Therefore, obviously, for the affiliated technical staff of this area, the present invention can be applied in the different structures, thereby following claim this most preferred embodiment of the present invention of being not limited to be described in detail or another embodiment shown in Figure 7.

Claims

1, a kind of binding post that is stamped to form with spring metal material edge, be used for wiring board at least on one side on conductive lead wire realize electrically contacting, it has two disconnected from each other opposed jig arm that extend upwardly out from matrix between arm, when a wiring board inserts therebetween, these two jig arm can produce strain, each jig arm has a upwardly extending part that links to each other with matrix and a part of extending from this ascender top downwards, this binding post is characterised in that each extends upward part has a U-loop shape part of inwardly stretching between matrix and downward extension.

According to the wire-pressed terminal of claim 1, it is characterized in that 2, the part that extends upward of described annular section top tilts inwards.

According to the binding post of claim 2, it is characterized in that 3, described downward extension is an oblique with the interior oblique part that extends upward part.

According to the binding post of claim 3, it is characterized in that 4, a contact point is arranged near the termination of each jig arm, this contact point is in the part of leaning on the lining most of described downward extension.

According to the binding post of claim 2, it is characterized in that 5, described annular section is positioned at the below of downward extension.

According to the binding post of claim 1, it is characterized in that 6, it has a pillar that extends upwardly out from the body portion between two jig arm.

According to the binding post of claim 6, it is characterized in that 7, pillar end face and described annular section are in sustained height basically.

8, according to the binding post of claim 7, it is characterized in that, stretch out a contact afterbody from the matrix bottom downwards.

According to the binding post of claim 8, it is characterized in that 9, described contact afterbody and pillar are point-blank.

According to the binding post of claim 1, it is characterized in that 10, the setting of described annular section should make most of strain of binding post be created in terminal part between annular section, matrix and matrix and the annular section.