JPH0319186Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a contact structure of a card attachment/detachment device having electronic functions. More specifically, the present invention relates to an improved contact point for a device for attaching and detaching a card incorporating an integrated circuit (hereinafter referred to as an IC).

With the recent development of IC technology, it has become possible to realize large-scale ICs on small chips.
A wide variety of products with advanced functions have been developed, and their uses have further expanded.

For example, read-only memory (ROM), in which programs such as microprocessors are written, and random access memory (RAM), which can read and write data, are embedded in thin cards. Summer.

Furthermore, electronic devices incorporating microprocessors and the like are becoming smaller and more pocket-sized, and there is an increasing demand for the use of cards incorporating ICs and the like in these devices.

To give an example of its use, so-called credit cards and cash cards, which are often used in financial matters, are also becoming more and more integrated into ICs.
Devices that use such electronic cards are also required to be pocket-sized.

[Conventional technology]

When using such an electronic card, the connection point between the card and the electronic device is a printed circuit board (hereinafter referred to as
Abbreviated as PCB. ), but since the handling of electronic cards is usually very rough, the edges are particularly prone to damage and are unreliable. Additionally, many leads had to be drawn out from the many terminals of the IC to the edges of the card, which was not always easy to manufacture and caused an increase in price.

To solve this problem, the IC terminals buried in the middle of the card or their vicinity are used as terminals to connect to electronic equipment, without extending the terminals to the ends of the card.

The number of these terminals increases as electronic devices improve their functionality and
With the increase in the number of IC cards, the number of terminals has increased and these terminals have come to be arranged in a limited area.

When a card with a terminal in the middle of such an electronic card is attached to and removed from an electronic device, the contact pins of the electronic device and the terminals of the electronic card are rubbed and the contact pins are damaged. It was not possible to obtain reliability over a million times.

In addition, to prevent the contact pins of the electronic device from rubbing against the terminals of the electronic card, some devices retract the contact pins before inserting the electronic card, and then push the contact pins out to make contact. The mechanism was complicated, the shape was large, and the operability was poor, leading to an increase in costs. Furthermore, in electronic cards in which many terminals are arranged at a fine pitch, there is a problem in that the electronic cards cannot be accurately positioned when mounted, resulting in a lack of contact reliability.

Therefore, the applicant of the present application filed Utility Application No. 1988-055007 (Utility Model Application No. 172363-1988) in order to solve the problems of the prior art, and further filed the application in 1985.
On September 9th, the company filed a patent application for the ``electronic card insertion/removal device''.

This patent application is shown and explained below in FIG.

FIG. 5 is a sectional view of an electronic device equipped with an electronic card attachment/detachment device. Here, 10 is the main body of the electronic device, 11 is an operation panel, 12 is a display such as a liquid crystal, 13 is a device for inputting data,
14 is a bottom plate, 15 is a card holder for holding the electronic card 16, 20A is a card latch for latching the electronic card 16 in a predetermined position when it is inserted, and 21 is a card latch. A card guide having a step on the back surface for guiding the electronic card 16;
2 is a reference surface which is the back side of the card guide which serves as a reference for the position when the electronic card 16 is latched;
3 is a card latch shaft that allows the card latch 20A to move in a small angle and allows the card guide 21 to move up and down; 26 is a plurality of shafts that are attached to a part of the card latch 20A and are used to contact the terminals of the electronic card. 27 is a flexible printed circuit board (PCB) for drawing out the signal line from the contact terminal 26; 28 is a terminal hole drilled in the card holder 15 through which the terminal 26 is passed; 31 is a spiral spring, for example, for constantly pushing up the card latch 20A; 51 is the first spring;
It is a rigid plate, and its tip is bent into an L shape and is pushed into the tip of the electronic card 16 that appears on the surface of the card holder 15, and has an abutment part 57 for pushing out the electronic card 16. We are prepared. Reference numeral 58 denotes an abutting hole formed in the card holder 15 to allow the abutting portion 57 to move. Reference numeral 61 denotes a second rigid plate provided in parallel with the first rigid plate. 71 is the second
This is a stopper for stopping the resilient plate 61 from being pushed together with the first resilient plate.

FIG. 5a shows the electronic card 16 inserted and latched, and FIG. 5b shows the electronic card 16 inserted and latched.
It is a diagram showing where to insert or take out.

FIG. 6 is a plan view showing the present invention with the panel 11 in FIG. 5 removed. This corresponds to FIG.

In FIG. 6, 52 and 53 are long guide holes for guiding the first rigid plate 51 to be pushed in a certain distance by inserting the electronic card 16, and 54 and 55 are long guide holes 52 and 53, respectively.
and 53, the first rigid plate 51
A fixed guide pin 59 is fixed to the bottom plate 14 so that the electronic card 16 can be slid and moved in a predetermined direction. This is a coil spring for pushing out 16. 62 and 63 are guide holes 52 and 53 provided in the second rigid plate 61 on the back side of the first rigid plate 51.
64 and 65 are movable guide pins located in the guide holes 62 and 63 and provided on the first rigid plate, 67
is a rigid arm forming a part of the second rigid plate for moving the card latch 20A by a small angle and ejecting the electronic card 16;
69 is a coil spring connected between the first rigid plate 51 and the second rigid plate 61. 77
is a solenoid which moves the stopper 71 through the wire 78 and moves the second reject plate 61.
79 is used to move the stopper 71 to the second position when the solenoid 77 does not operate.
This is a coil spring for setting the reject plate 61 in the stop position.

Reference numeral 82 denotes a rigid taper that is provided in a part of the Y-shaped card latch 20A and is pushed down by the movement of the rigid arm 67.

FIG. 7A is in FIG. 5b, and FIG. 7B is in FIG.
FIG. 5 is a diagram for explaining the operations of the first rigid plate 51, the second rigid plate 61, and the stopper 71 in FIG. 5a.

FIG. 8A shows the rigid taper 8 provided on the rigid arm 67 and the card latch 20A.
FIG. 8B is a partially enlarged perspective view of the second rigid plate 61 and the stopper shaft 74, which is rotatable to the bottom plate 14 through the shaft hole 73 in the direction of the arrow 96. FIG. 7 is a partially enlarged perspective view showing the relationship with a stopper 71 that is stopped in this manner.

When the electronic card 16 is inserted, its tip hits the card guide 21, pushes down the card latch 20A, slides on the surface of the card holder 15, and hits the abutting part 57 without rubbing the lowered contact terminals 26. (Figure 5b), 7th
Figure A).

When the electronic card 16 is further pushed in the direction shown by the arrow 92 in FIG.
Pushed in direction 2. As a result, the coil spring 59 is stretched, and the second rigid plate is also pulled by the coil spring 69, but the stopper 7
1 has stopped its movement, it cannot move, and the coil spring 69 is stretched.

Then, when the rear end of the electronic card 16 passes over the card guide 21 and falls into the step on the back side, the card latch 20A is pushed up by the pushing force of the spring 31, the contact terminals 26 come into contact with the electronic card 16, and the electronic card 16 is latched (Figures 5a and 7B).

In this latched state, the force of the coil spring 59 causes the abutting portion 57 to move the electronic card 1
6 in the direction of arrow 97 (Fig. 7B b),
Since the rear end of the electronic card 16 is pressed against the reference surface 22, which is the back surface of the card guide 21, and placed in an accurate position, the contact terminals 26 can be contacted with extremely high precision.

In the state shown in FIG. 5a and FIG. 7B,
When current is momentarily applied to the solenoid 77, the solenoid 77 operates and moves the wire 74 in the direction of the arrow 91.
The stopper 71 is slightly rotated about the stopper shaft 74 (see FIG. 8B) by overcoming the force of the tension coil spring 79 in the direction shown in FIG. 7B (a), and removed from the second rigid plate tip 68.

There, the second coil spring 69 was being pulled.
The reject plate 61 is connected to the arrow 93 (FIG. 7B
Move rapidly in the direction shown in Figure A). Then, the resilient arm 67 moves in the direction shown by the arrow 93, and the resilient taper 82 moves in the direction indicated by the arrow 95 (the eighth
Push down in the direction shown in Figure A) to release the card latch 20.
A is rotated by a small angle so that the card guide 21 is positioned below the surface of the card holder 15, and the coil spring 59 operates to push out the electronic card 16 via the abutting portion 57. Then, the state returns to the state shown in FIG. 5b and FIG. 7A. Here, the distance by which the electronic card 16 pops out can be set by the lengths of the guide holes 52, 53, 62, and 63.

In the above description, the second rigid plate 61
was located between the first rigid plate 51 and the bottom plate, but the positions of the first rigid plate and the second rigid plate are changed, and the first rigid plate is positioned between the second rigid plate and the bottom plate. It is also possible. In the above description, a case has been described in which the contact terminals 26 come into contact with the electronic card from the bottom side, but the electronic card attachment/detachment mechanism according to the present invention can be turned upside down and attached so that the contact terminals 26 come into contact with the electronic card from the top side.

In the above description, the force for pushing up the card latch 20A was based on the spring 31, which is a spiral spring, but this may be changed as shown in FIG. 9 or FIG. 10.

In FIG. 9, 38 is a U-shaped spring formed in a U-shape as shown in b, and the width of the U shape is W, and it is installed between the plate 14 and the card latch 20A as shown in a. . The U-shaped spring 38 is about to widen beyond its width W, and the card latch 20
Pushing up A. Conversely, when the card latch 20A is pushed down in the direction shown by the arrow 42, the width of the U-shaped spring 38 becomes smaller than W, so when the pushing force is removed, the card latch 20A is pushed up.

In FIG. 10, reference numeral 39 denotes a coil spring, which is mounted around the shaft between the card latch shaft 23 and the bearing 24, thereby constantly pushing the card latch 20A upward.

In addition, in FIGS. 5 and 6, the main body 10
There is an electronic circuit built into it, but it is not shown because it is not directly relevant.

[Problem that the invention attempts to solve]

The prior art explained with FIGS. 5 to 8 is
Although it solves many problems, it has the following problems.

As electronic cards become more popular, they tend to be handled extremely roughly, and the terminal surface of the electronic card that comes into contact with the contact terminals of the electronic card attachment/detachment device is not necessarily flat and may be distorted, such as warping or twisting. The contact terminal may not make complete contact with the terminal surface of the electronic card.
If the spring pressure of the spring 31 is increased in order to prevent this, the terminal surface and contact terminals of the electronic card will be damaged, making it impossible to achieve high reliability, such as the ability to withstand 1,000,000 attachment/detachment cycles. In particular, for devices with a large number of terminals and narrow terminal spacing, it has been difficult to obtain such highly reliable contacts in a flat and compact shape.

[Means for solving problems]

It has an arm portion that is substantially parallel to the surface of the electronic card and is capable of generating sufficient contact pressure, and a J-shaped portion formed at the tip of the arm portion, the tip of which forms a stopper portion. A contact terminal board for arranging multiple contact terminals on a flat surface, and a contact part at the bottom of the J-shape that can come into contact with the electronic card, so that the position of the contact part does not fall too low when there is no electronic card. The contact terminal board is provided with a terminal hole having a step to support a stopper part for fixing the contact terminal plate, and is comprised of a board located between the electronic card and a contact terminal board for fixing the contact terminal board.

[Effect]

When the electronic card is inserted, the board moves away from the electronic card, and after insertion, the board approaches the electronic card and the contact parts come into contact with the electronic card, but each contact part can get good contact. Since this arm portion is sufficiently long, its springiness does not become fatigued, and sufficient reliability can be obtained. In addition, if multiple rows of contact terminals are required, this can be done by stacking multiple contact terminal boards on the board, and the planar structure allows for a flat and compact shape. I was able to do that.

〔Example〕

Embodiments of the present invention are shown in FIGS. 1, 2, 3, 4A, and 4B, and will be described below.

Fig. 1 shows an embodiment of the present invention, which is a contact structure for an electronic card to cope with the case where the terminals of the electronic card are arranged in two rows. Figure 2 is an exploded perspective view. Here, 16 is an electronic card, and 100 is a board, which is provided with a plurality of terminal holes 111 and 112, studs 117 and 118 having a base 116, and a stud hole 134. 271 and 2
72 is a contact terminal board, and each contact terminal 261 and 26 is made of a plurality of springy materials.
The contact terminals 261 and 262 include contact terminal arms 267 and 268 extending in a direction parallel to the electronic card 16, and J-shaped portions at the tips of the contact terminal arms 267 and 268. , the bottom of the J-shape is the electronic card 1
Contact portions 265 and 266 as contact points with 6
and the stopper part 2 of the contact terminal is placed at the leading edge of the J-shape.
63 and 264, and the J-shaped portion can move in the vertical direction with a sufficiently large contact pressure against the surface of the electronic card within the terminal holes 111 and 112 of the board 100. , the movable range in the direction of the electronic card is the terminal holes 111 and 1.
Steps 113 and 114 provided in 12
The stopper portions 263 and 264 of the contact terminal are supported by the contact terminals. Contact terminals 261 and 26 of contact terminal boards 271 and 272
Each contact terminal 261 is on the opposite side to the extending direction of
Contact terminal lead part 2 for pulling out and 262
73 and 274 extend and are connected to a flexible PCB (not shown). 23
1 and 232 are studs for positioning the contact terminal boards 271 and 272, respectively;
The stud holes 234 of the contact terminal board 272 and the stud holes 134 of the board 100 are press-fitted.
The contact terminal boards 271 and 272 include the board 10
A stud 118 rising perpendicularly from the contact terminal board 271 passes through the contact terminal board 271, and a stud 117 standing on a pedestal 116 having the same thickness as the contact terminal board 272 passes through the contact terminal board 271.
and 118 are pressed and crushed to form stud heads 119 and 120, and contact terminal boards 271 and 272 are fixed to the board 100.

FIG. 3 shows a state in which the electronic card 16 is not in contact with the contact parts 265 and 266, and shows a state in which the contact terminal stopper parts 263 and 264 are supported by the steps 113 and 114.

FIG. 4A is a diagram showing a modified example of the present invention,
The position of the step 113a that supports at least one contact terminal used as a ground among the many contact terminals 261 and 262, for example, the contact terminal stopper portion 263a of 261a in the drawing, is located closer to the electronic card than the position of the step 114. Therefore, the contact portion 265a is the same as the contact portion 26.
It is located in a position that protrudes further than 6, and is indicated by arrow 98.
When the substrate 100 moves in the direction indicated by , the protruding contact portion 265a will first contact the electronic card and be grounded, or the stored contents of the electronic card 16 will not be damaged.

In order to ensure grounding, two contact terminals as shown at 261A and 261B in FIG. 4B are used as the contact terminals used for grounding, and the contact terminal leads 273A and 273B are grounded. good. In this way, by using the two contact terminals 261A and 261B, it is possible to obtain reliable grounding even when the contact surface of the electronic card is dirty or scratched. The double contact terminals 261A and 261B shown in FIG. 4B may have their contact portions 265a protruding from the other contact portions, like the contact terminal 261a shown in FIG. 4A.

The electronic card contact structure according to the present invention described above was published in Utility Application No. 1988-055007 and August 1985.
Patent application for "electronic card attachment/detachment device" on 9th (Figure 5~
If used as the contact terminal shown in FIG. 8B), an extremely reliable and easy-to-use compact electronic card attachment/detachment device can be realized. To this end, a card latch 20A shown in FIGS. 5 and below can be used as the substrate 100.

[Effect of idea]

As is clear from the above explanation, each contact terminal is independently flexible, and although sufficient contact pressure can be obtained at the contact part of the contact terminal, the surface of the board at the contact part Since the protrusion distance is kept to a small value, even if the terminal surface of the electronic card is warped or otherwise distorted, sufficiently good contact can be obtained. The present invention provides a highly reliable contact structure for an electronic card in which contact terminal boards can be overlapped according to the terminal rows, and fatigue of the contact terminals is extremely low, and the effect is extremely large.

Furthermore, if used in combination with the prior art pending by the present applicant, there will be no damage caused by rubbing the contact terminals when an electronic card is inserted, which is an effect of the prior art, so there will be no contact failure, etc. This does not cause any malfunction, and the effects of the present invention are extremely large.

[Brief explanation of drawings]

FIG. 1 is a plan view and side sectional view showing an embodiment of the present invention, FIG. 2 is an exploded perspective view, FIG. 3 is a side sectional view without an electronic card, and FIG.
Figure 4B is a side sectional view and a plan view showing other embodiments, respectively. FIG. 5 is a side sectional view showing the prior art, FIG. 6 is a plan view, FIGS. 7A and 7B are partially enlarged views, and FIGS. 8A and 8B are partially enlarged perspective views. 9 and 10 are also partially detailed views. 10...Body, 11...Panel, 12...Display, 13...Key, 14...Bottom plate, 15...
...Card holder, 16...Electronic card, 20A...
...Card latch, 21...Card guide, 22...
... Reference surface, 23 ... Card latch shaft, 24 ... Bearing, 26 ... Contact terminal, 27 ... Flexible
PCB, 28...terminal hole, 31...spring, 38...
... U-shaped spring, 39 ... Coil spring, 51 ... First rigid plate, 52, 53, 62, 63 ... Guide hole, 54, 55 ... Fixed guide pin, 57 Abutment part, 58 ... Abutment part Hole, 59, 69,
79... Coil spring, 61... Second rigid plate, 64, 65... Movable guide pin, 67... Reject arm, 71... Stopper, 73...
Shaft hole, 74... Stopper shaft, 77... Solenoid, 78... Wire, 82... Reject taper, 100... Board, 111, 112... Terminal hole, 113, 114... Step, 116... Pedestal , 117, 118, 231, 232... Stud, 119, 120... Stud head, 134,
227-229,234... Stud hole, 26
1,262...Contact terminal, 263,264...Stopper part, 265,268...Contact terminal arm,
271, 272...Contact terminal board, 273, 27
4...Contact terminal lead part.

Claims (1)

[Claims for Utility Model Registration] (1) An arm portion that is substantially parallel to the surface of the electronic card and capable of generating sufficient contact pressure, and a stopper formed at the tip of the arm portion. a contact terminal board means for arranging a plurality of contact terminals on a plane, the contact terminal having a J-shaped portion forming a section; capable of moving and contacting the electronic card with sufficient contact pressure;
a plurality of terminal holes having steps for supporting the stopper part for defining a range of vertical movement of the contact part with respect to the electronic card when the electronic card is not present; the step of at least one of the holes is lower than the step of the other terminal holes, and is located between the contact terminal board means and the electronic card for securing the contact terminal board means; 1. A contact structure for an electronic card, characterized in that it comprises a substrate means. (2) The electronic card contact structure according to claim 1, wherein at least one of the plurality of contact terminals is constituted by a plurality of contact terminals. (3) The contact structure for an electronic card according to claim 1, wherein the contact terminal board means is a stack of a plurality of contact terminals in which the plurality of contact terminals are arranged in a plane.