CN1076892C

CN1076892C - Smart card connector

Info

Publication number: CN1076892C
Application number: CN94109144A
Authority: CN
Inventors: R·施旺; R·克兰马
Original assignee: Whitaker LLC
Current assignee: Whitaker LLC
Priority date: 1994-09-08
Filing date: 1994-09-08
Publication date: 2001-12-26
Anticipated expiration: 2014-09-08
Also published as: CN1104381A

Abstract

The present invention relates to an electrical socket connector (2) which is used for connecting the fine circuit of a conductive circuit on a card (4). The socket connector is provided with a plurality of contact wheels (20) which are installed on an elastic cantilever (22) in a rotatable mode; the wheels (20) extend into a card receiving seam (8) of the socket connector (2); consequently, the contact points (20) of the wheels are pressed on the surface of the car at the card receiving seam (8). When a card (4) is further inserted in the seam (8), each wheel is prompted to roll on the surface of the card; thus, the friction of the card and the surfaces of the contact points can be avoided, but simultaneously, appropriate contact pressure is maintained.

Description

Smart card connector

The present invention relates to a kind of electric connector that is contained on the printed circuit board (PCB) and can receives storage card, more particularly, relate to a kind of connector that reduces the contact friction wearing and tearing.

It is extremely common thing with relevant connector interconnection that various secrecy systems are equipped with storage card or what is called " smart card ".This storage card has many active devices to be contained on the circuit card so that the fine circuit on the printed circuit board (PCB) is interconnected.These circuit are installed in access code on the circuit card usually.Then circuit card is inserted with in the system of pass, this system may be the radio or the telephone system of automobile, also may be the discrepancy oralia of opening that a meeting will be led to the security personnel place in the building.

Because these cards often use, so one of them requirement is that the trickle circuit of each contact portion and card can bear the cyclic process that contacts many times.For meeting this requirement, need avoid or reduce the connector contact portion significantly in the friction of card on the trickle circuit.

Based on above-mentioned requirements, the purpose of this invention is to provide a kind of electric connector that can avoid each contact portion of connector and the trickle circuit that blocks circuit to rub in order to be connected with the trickle line electricity of storage card circuit.

Another object of the present invention provides not only easily to be made but also still safe and reliable above-mentioned plug-in unit.

The present invention also has the another one purpose, and a kind of small and exquisite card connector spare that has reduced contact friction wearing and tearing, cost efficient promptly is provided.

For achieving the above object, the invention provides a kind of like this electric connector, be used to be electrically connected the trickle circuit of circuit of card and the trickle circuit of printed circuit board (PCB), this electric connector has a sealing and a plurality of contact plug, the profile of sealing is obtained and is made it can receive described card in this sealing, contact plug then is used for the trickle circuit of interconnect printed circuit board

It is characterized in that, be placed near the contact member of described sealing, this contact member by elastic arm and the wheel trolley that is arranged on rotationally on this elastic arm constitute, described contact plug is electrically connected with described wheel trolley, thereby rolled in described wheel trolley surface along card when card inserts in the sealing, to engage with described trickle circuit on the described printed circuit board (PCB), when described card is not in sealing, described wheel trolley stretches in the sealing, and insert in the process of sealing at card, described wheel trolley rolls on card, and when card inserted in the sealing fully, described wheel trolley then flexibly was biased on the fine circuits of card circuit.

Referring now to description of drawings content of the present invention.In the accompanying drawing:

Fig. 1 is the top plan view of most preferred embodiment of the present invention;

Fig. 2 is the front view of this most preferred embodiment;

Fig. 3 is the cutaway view along 3-3 line intercepting shown in Figure 1;

Fig. 4 is the top plan view in these more needed holes of most preferred embodiment connector of installing on the printed circuit board (PCB);

Fig. 5 is the isometric view of the card of most preferred embodiment of the present invention, and card is prepared accepting in the sealing of insertion connector.

Referring to Fig. 5.Electric connector is totally by 2 expressions, and the substrate card of intending inserting in the connector is represented totally by 4.Can see that connector 2 has a shell 6; Sealing 8, in the front 11 of connector 2, its profile is obtained can be in order to receiving card 4; Some contact members 12 stretch in the sealing 8 by contact chamber 14; One reads in contact 16 and a plate locking piece 18, in order to connector 2 is attached on the printed circuit board (PCB).

Among Fig. 3, can see that contact member 12 comprises elastic arm 22 and is installed in wheel trolley 20 on the elastic arm 22 rotationally.In most preferred embodiment, can see that elastic arm 22 is cantilever reeds, its stiff end 23 is fixed on the shell 6, and its free end is an axle 25, bend in the centre bore 24 of wheel trolley 20, thereby wheel trolley 20 can be rotated around it.In order to electrically contact with printed circuit board (PCB), stiff end 23 bendings of elastic arm 22, thereby contact plug 28 is stretched out outside the base 26 of shell 6, and 26 of bases lean against on the top surface of printed circuit board 27 shown in Figure 4 basically, and contact plug 28 stretches in the respective aperture 30 of printed circuit board (PCB) 1.In most preferred embodiment, contact plug 28 is connected with the trickle line electricity of circuit of printed circuit board (PCB) by soldering, but also can adopt non brazing method of attachment known such as compression fit.Plate locking piece 18 prevents that connector 2 from dropping from printed circuit board (PCB) 1 in the various assembly operation processes that are installed in the various electric devices on the printed circuit board (PCB) 1.The elastic arm of this most preferred embodiment is made by cylindrical conductor, and this has such benefit, promptly need not prepare the axle 25 of circular section especially, and the benefit of circular section axle is to make wheel trolley 20 to rotate about it reposefully.

In most preferred embodiment, a plurality of contact members 12 are lined up two rows 17,19.This configuration mode has not only reduced contact member 12 and has contacted needed width with card 4, and has reduced needed power in the card insertion connector 2.Contact member 12 is touched with the elastic force that overcomes elastic arm 22 and these contact members are lifted to card need strengthen insertion force when surperficial in the front of card.By reducing the number of the contact member that the front of in the card insertion process, being blocked simultaneously lifts, as this most preferred embodiment carries out, just can reduce the insertion force of card.

When card 4 inserts in the sealing 8 is to have suitable elasticity and enough deflection capacity when wheel trolley 20 is come out from sealing 8, and elastic arm is made very long one.In most preferred embodiment, two spacings that connect between the

contact member

17,19 are advisable with nearer, and a method that reaches this purpose is by means of elongated elastic arm each contact member to be disposed face-to-face.

Electrically contacting between card each trickle circuit of circuit and the contact member 12 is by carrying out in the card 4 insertion connector sealings 8 that will correctly dispose.In the process of inserting, the wheel trolley 20 of first row's 17 contact member 12 flexibly is biased to the front of card 4, till first row 17 of wheel trolley 20 is pressed in the contact-making surface of card; Card 4 comes on the card 4 first of wheel trolley when further inserting and rolls, and second row 19 of contact member 12 then catches up with, and also flexibly is biased on the surface of card 4, and rolls on the surface of card 4, till snapping into the end that reaches sealing 8.Wheel trolley 20 rolls, can reduce the wearing and tearing of trickle circuit of card circuit and wheel tread, this is owing to there not be the cause of friction, in any case but each contact member with block between the trickle circuit of circuit owing to supporting elastic arm 22 elastic biasings of wheel trolley 20 thereby being maintained normal contact pressure.From the process that sealing 8 is extracted out, wheel trolley 20 rolls on card at card, avoided once more blocking 4 and connector contact member 12 between any abrasive action.

Fig. 4 shows the layout in all holes of printed circuit board (PCB) of installing most preferred embodiment of the present invention thereon.Aperture 30 usefulness are accepted the contact plug 28 of connector 2, the insertion of the plate locking piece 18 of bigger hole 29 usefulness connectors 2.

Can see among Fig. 5 and Fig. 1 and read in contact 16 that its effect is to detect whether to have card to insert fully in the connector sealing 8.In most preferred embodiment, reading in contact 16 is individual cantilever type elasticity long leads that stretch in connector 2 sealings, thereby block 4 in case part when inserting in the sealing 8, read in contact 16 and just up be biased on the surface of card and being electrically connected of cut-out and corresponding contacts 15, have or not card 4 existence thereby can detect.

It should be understood that card connector described here 2 only is a most preferred embodiment of the present invention, it should not limit this claimed invention.More particularly, connector 2 can be connected with conductive cable and not be installed on the printed circuit board (PCB) 1, but the small and exquisite property and the configuration mode change of contact 12 equally also can change the shape of elastic arm 22 bendings.

Claims

1. an electric connector (2), be used for being electrically connected the trickle circuit of circuit of card (4) and the trickle circuit of printed circuit board (PCB) (1), this electric connector (2) has a sealing (8) and a plurality of contact plug (28), the profile of sealing (8) is obtained and is made it can receive described card (4) in this sealing, contact plug (28) then is used for the trickle circuit of interconnect printed circuit board

It is characterized in that, be placed near the contact member (12) of described sealing (8), this contact member (12) is made of elastic arm (22) and the wheel trolley (20) that is arranged on rotationally on this elastic arm, described contact plug (28) is electrically connected with described wheel trolley (20), thereby rolled in described wheel trolley (20) surface along card (4) when card (4) inserts in the sealing (8), to engage with described trickle circuit on the described printed circuit board (PCB) (1), when described card (4) is not in sealing (8), described wheel trolley (20) stretches in the sealing (8), and insert in the process of sealing (8) at card (4), described wheel trolley (20) is gone up at card (4) and is rolled, when card (4) inserted in the sealing (8) fully, described wheel trolley (20) then flexibly was biased on the fine circuits of card circuit.

2. connector as claimed in claim 1, it is characterized in that, connector (2) has a base (26), can be contained in basically on the printed circuit board (PCB) (1), thereby elastic arm (22) is directly electrically contacted between wheel trolley (20) and the trickle circuit of printed board circuit.

3. connector as claimed in claim 1 is characterized in that, elastic arm (22) is a cantilever type beam, thereby its stiff end (23) is fixed on the connector (2), and its axle head (25) is rotatably fixed on the wheel trolley (20).

4. connector as claimed in claim 1 or 2 is characterized in that, elastic arm (22) has contact plug (28) to stretch out and can pass through respective aperture (30) installing on the printed circuit board (PCB) (1) from base (26), electrically contacts with circuit board (1).

5. connector as claimed in claim 1 is characterized in that, elastic arm (22) has a contact plug (28) and an axle (25), and wheel trolley (20) is rotatably fixed to axle (25) and goes up integral body of formation.

6. connector as claimed in claim 1 is characterized in that, elastic arm (22) is made by cylindrical lead basically.

7. connector as claimed in claim 1 is characterized in that, described contact member (12) each interval one segment distance becomes two row arrangement of mirror type.