JPH04162185A - Card reader/writer - Google Patents

Abstract

PURPOSE:To improve operation reliability by providing an engagement part at the lower part of a card insertion port in a case front provided in front of a case mainbody, projectingly providing a pressing piece on the case front- side of a baseplate and pressing the engagement part by means of the pressing piece. CONSTITUTION:The case front which as the card insertion port 5 and which is shaped by synthetic resins is provided in front of the case mainbody 2. The metallic baseplate 3 is arranged at the bottom of the case mainbody 2. The groove-like engagement part 68 is formed at the lower part of the card insertion port 5. The pressing piece 66 is projectingly provided on the case front 4-side of the baseplate 3. At the time of assemblying a card reader/writer 1, the pressing piece 66 of the baseplate 3 is inserted into the engagement part 68. Since the case front 4 is shaped by synthetic resins, it may happen that the whole case front 4 or the vicinity of the card insertion port 5 is deformed into a cone shape. The engagement of the pressing piece 66 and the engagement part 68 securely corrects the deformation.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a card reader/writer such as an IC card reader/writer, and particularly relates to a case body and a case body molded from a synthetic resin disposed on the front surface of the case body. The present invention relates to a card reader/writer equipped with a case front, and particularly to the case front.

[Conventional technology] Conventionally used in IC card readers/writers, etc.

Some have a structure in which a case front having a card insertion slot is arranged on the front side of the case body. By separating the case body and the case front in this way, there are advantages such as easier molding and assembly operations, but it is not without some problems.

[Problem to be solved by the invention] That is, the case front described above is usually injection molded from synthetic resin, but the lower part of the card insertion slot deforms into a chevron shape due to the wall thickness and shape of each part of the case front. There are many things that happen. If the vicinity of the card insertion slot is deformed as shown in item 2, it poses a problem in that it becomes difficult to insert and remove the card, and the operation of inserting and removing the card cannot be carried out smoothly.

The purpose of the present invention is to eliminate such drawbacks of the prior art,
To provide a card reader/writer with high operational reliability.

[Means for Solving the Problem] In order to achieve the above-mentioned object, the present invention provides a case front molded from synthetic resin having a card insertion slot on the front surface of the case body, and a case front molded from synthetic resin having a card insertion slot. In a card reader/writer with a metal bottom plate.

An engaging portion is provided below the card insertion slot on the case front, a presser piece is provided protruding from the case front side of the bottom plate, and the presser piece on the bottom plate presses the engaging portion. be.

[Function] In this way, by pressing the engaging portion provided below the card insertion slot with the presser piece of the bottom plate made of metal and having mechanical strength, the deformation of the cart insertion slot can be reliably corrected mechanically. I can do it.

Therefore, it is possible to smoothly insert and remove the cart from the card insertion slot, and it is possible to provide a card reader/writer with high operational reliability.

[Example] Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of the IC card reader/writer according to the embodiment, FIG. 2 is a plan view of the IC card reader/writer with some upper parts removed, and FIG. 3 is a front view of the IC card reader/writer. FIG. 4 is a bottom view of the IC card reader/writer with the bottom plate removed.

As shown in FIG. 1, the IC card reader/writer 1 includes a case body 2, a bottom plate 3 made of, for example, an aluminum plate placed on the bottom of the case body 2, and a case placed on the front side of the case body 2. It mainly consists of the front 4.

A card insertion slot 5 is formed near the bottom of the case front 4, and an IC card 6 is inserted through the card insertion slot 5.
can be inserted manually. A recess 7 is formed in the center of the front surface of the case front 4 to facilitate the insertion and removal of the IC card 6.

The IC card 6 is an IC chip or a printed base! (both not shown) and a terminal portion 8 exposed on the top surface are attached.

As shown in FIG. 2, the case body 2 includes a connector 9 for connecting to an external control device (for example, a personal computer, etc.), a printed circuit board 10. A carriage 11 equipped with a contact pin, a plunger 12. Micro switch 13, lock lever 14, hook driver 1
5 and a hook 16 are attached.

Further, as shown in FIGS. 2 and 3, inside the case front 4, there is a shutter 17 that is rotatably biased in a direction that always closes the card insertion slot S, and an inserted I/O shutter 17.
A press pin 18 for forcibly ejecting the C card 6 is built-in. Further, the tip of the hook 16 enters inside the case front 4 and extends to the card insertion slot 5.

As shown in FIG. 4, a slide plate 19 is arranged on the bottom surface of the case body 2 so as to be slidable in the direction of the arrow. Also, on the side wall of the case body 2 opposite to the reference side M21 and near the card insertion slot 5.

A plate spring 20 is arranged to elastically bias the IC card 6 against the reference side wall 21.

FIG. 5 is a bottom view of the lock lever 14.

As shown in the figure, the lock lever 14 has a substantially L-shaped planar shape, and a through hole 22 is formed near the bent portion of the L-shape. By inserting a pin 23 shown in FIG. 2 into the through hole 22, the lock lever 14 is rotatably supported. One end of the lock lever 14 is provided with a stopper step 24 that engages with a hook active body 15, which will be described later. Further, the other end of the lock lever 14 is formed with a square hole 26 into which the drive pin 25 of the plunger 12 is inserted, and a pressing portion 28 which moves the detection end 27 of the microswitch 13.

FIG. 6 and FIG. 7 are a side view and a plan view of the hook driving body 15.

The hook driver 15 has a first side wall 29 and a first side wall 2 thereof.
9, a connecting side wall 31 connecting the first side wall 29 and the second side wall 30, and a connecting bottom wall 32,33.

On the inner surface of the tip of the first side wall 29, as shown in FIG. 6, there is a hook driving inclined part 34, and a counter inclined part 35 facing the hook driving inclined part 34 at a predetermined distance. A locking portion 36 is formed continuously with the lower end of the opposing inclined portion 35 and extending in the horizontal direction.

As shown in FIG. 7, a trapezoidal portion 37 is formed on the inner surface of the tip of the second side wall 30 and projects inward.

As shown in FIGS. 8 and 9, the hook 16 is
The case body 2 has a recess 39 into which a support bin 38 is inserted, which is horizontally protruding from the case body 2, a closing part 40 that blocks the card insertion slot 5, and a bin part 41 extending toward the hook driver 15. There is. This hook 16 is attached to the support bin 38.
It is rotatably supported by the case body 2 by.

10 and 11 are a plan view and a side view of the carriage 11. The carriage 11 has a plurality of contact bins 43 extending downward from the carriage body 42.
stands out. In addition, a first pin 44 and a second pin 44 are provided at the front, middle and rear positions of both sides of the carriage body 42, respectively.
A bottle 45 and a third pin 46 each protrude. A spring hook 47 is formed on one side of the second bottle 45 .

As shown in FIG. 2, this carriage 11 is movably supported by two carriage guide portions 48 protruding from the case body 2. As shown in FIG. As shown in FIG. 12 and @13, this carriage guide section 48 is connected to the carriage 11
a first guide part 49 for guiding the first pin 44, a second guide part 50 for guiding the second bottle 45, and a third guide part 51 for guiding the third pin 46. have. The guide portions 49, 50, 51 are similarly inclined in a slightly arcuate manner downward.

The first pin 44 is guided by the lower surface of the first guide portion 49, the second bottle 45 is guided by the upper surface of the second guide portion 5o, and the third pin 46 is guided by the lower surface of the third guide portion 51. It has become so.

As shown in FIG. 2, a gateway 52 is formed inside the carriage guide 48 to allow the contact bin 43 to move.

FIG. 14 is a plan view of the slide plate 19, and FIG. 15 is a plan view of the slide plate 19.
An enlarged sectional view on line A-A, Figure 16 is Figure 14 B-B
It is an enlarged sectional view on a line.

As shown in FIG. 14, the slide plate 19
It has a flat part 53 on which the flat part 53 is placed, and on both sides of the flat part 53 there are formed projecting pieces 54 for engaging with the side walls of the case body 2 and moving the slide plate 19 in the horizontal direction. .

Further, a contact rib 55 is formed at the tip of the flat portion 53, with which the tip of the ZC card 6 comes into contact. A chamfer 55a is provided for guiding (see FIG. 16), and a carriage tension portion 57 and a spring hook portion 56 are provided upward from the abutment rib 55.

17 and 18 are a plan view and a side view of the leaf spring 20. The leaf spring 20 has a substantially 7-shaped planar shape and is composed of a flat base end 58 and a flat free end 59, and a bent part 60 is formed at the tip of the free end 59. It is formed. A one-arc shaped notch 61 is provided at the central upper end of the base end 58 .

As shown in FIG. 4, this leaf spring 20 has the base end portion 58
is arranged so as to be in contact with the side wall of the case body 2. Then, as shown in FIG. 18, the lower edge of the base end portion 58 is placed on the horizontal rib 62 provided on the side wall of the case body 2, and the protrusion 63 is fitted into the notch 61. The leaf spring 20 is positioned relative to the side wall of the main body 2 in the vertical and horizontal directions.

19 and 20 are a plan view and a side view of the bottom plate 3. FIG. This bottom plate 3 is made of a metal plate such as aluminum, and has six 65 on both side walls 64 that engage with the case body 2. Further, on the case front 4 side of the bottom plate 3, a push piece 66 that engages with the case front 4 protrudes in a state of being bent one step upward.

In the case of FIG. 19, the pusher piece 66 is provided over almost the entire width, but as shown in FIG. 20, the pusher piece 66 can be divided into a plurality of parts and provided, for example, in the center and on both sides.

Figure 22 is a rear view of the case front 4, and Figure 23 is a rear view of the case front 4.
FIG. 2 is a sectional view taken along the line C-C in FIG.

As shown in FIG. 22, a card insertion slot 5 is formed near the bottom of the case front 4, and a pin holding hole 67 for inserting the press bottle 18 is formed slightly above the card insertion slot 5. ing. Further, a groove-shaped engagement portion 68 having approximately the same length as the cart insertion opening 5 is formed below the card insertion opening 5 . When assembling the IC card reader/writer, the push piece 66 of the bottom plate 3 is inserted into the engaging portion 68.

Since the case front 4 is molded from synthetic resin, there is a risk that the entire case front 4 or the vicinity of the card insertion slot 5 may deform into a chevron shape due to the wall thickness of each part, which may impede loading and unloading of the cart. In order to solve this problem, the bottom plate 3
The deformation is mechanically corrected by inserting and engaging the pushing piece 66 into the engaging portion 68 of the case front 4.

FIG. 24 is a diagram showing a modification of the engaging portion 68. In the second case, a stepped engaging portion 68 is formed, and the engaging portion 68 is forcibly pressed by the pusher piece 66 of the bottom plate 3. It is in a state of

25 and 26 show the bottom plate 3 and the printed circuit board 1.
FIG. 2 is a cross-sectional view showing the relationship with zero. As shown in these figures, a grounding electrode 69 is formed on the printed circuit board 10, and a through hole 70 is formed in the case body 2 at a position facing the electrode 69. A conductive spring 71 is inserted into the through hole 7o, the bottom plate 3 and the electrode 69 are electrically connected, and the bottom plate 3 is grounded via the printed circuit board 10. If static electricity is accumulated on the bottom plate 3 for some reason, noise may be generated when the C card is inserted into the reader/writer. For this purpose, the bottom plate 3 is grounded to avoid the negative effects of static electricity.

Returning to FIG. 2 again, reference numeral 72 denotes a coil spring interposed between the main body of the plunger 12 and the drive pin 25, which always elastically biases the drive pin 25 in a direction away from the plunger 12.

Reference numeral 73 in the figure is a carriage return spring, and the spring hook pin 7 protrudes from the spring hook portion 47 of the carriage 11 and the case body 2.
It is suspended between 4. This carriage return spring 7
3, the carriage 11 is always elastically biased toward the home position.

Further, 75 is a slide plate return spring, and a spring hook pin 76 protrudes from the spring hook portion 56 of the slide plate 19 and the case body 2.
It is strung between. This slide plate return spring 75
Therefore, the slide plate 19 is always elastically biased toward the case front 4 side.

The structure of the IC card reader/writer is as described above, and the principle of its operation will be explained first.

Before the IC card 6 is inserted into the card reader/writer, the card insertion slot 5 formed in the case front 4 is blocked by a shutter 17 as shown in FIG. 3 to prevent dust from entering. is being prevented.

As shown in FIG. 2, the carriage 11 is held at the home position by a carriage return spring 73. And as shown in FIG.

Each bin 44, 45, 46 of the carriage 11 has a guide part 49
．． 50.51, so that the carriage 11 is in the upper position.

Further, as shown in FIG. 9, the bottle portion 41 of the hook 16 is locked to the locking portion 36 of the hook swinging body 15, and the closing portion 40 is held in a position retracted from the card insertion 05.

As shown in FIG. 27, the plunger 12 is in a non-energized (not pulled) state, and therefore the spring force of the coil spring 72 causes the drive pin 25 to move toward the left end 1#26b of the square hole 26 when viewed from the drawing. is in contact with. As will be described later, one side of the square hole 26 is designed to be slightly larger than the diameter of the drive bin 25. Therefore, as described above, when the drive pin 25 contacts the left end #26b, the drive pin 25 and the right side A gap G is formed between the end $26a and the end $26a.

At the time of 2, the suppressing portion 28 of the lock lever 14 is in contact with the detection end 2, but the microswitch 13 is not turned on.

Also, in this state of the lock lever 14, the stopper stepped portion 2
4 has come off the tip of the second side wall 3o and rides on the trapezoidal part 37. In this way, the hook driver 15 is not engaged with the lock lever 14.

The spring hook part 56 of the slide plate 19 is the connection bottom J of the hook driver unit 5! 32 and is pulled by the slide plate return spring 75 to a position close to the case front 4. As described above, the pin portion 41 of the hook 16 is engaged with the locking portion 36 of the hook driver 15 (see FIG. 9).

Furthermore, the lower slide plate 19 is as shown in FIG.

It is kept on standby on the case front 4 side by the tensile force of the slide plate return spring 75. When the slide plate 19 is in this standby position, the free end 20 of the leaf spring 2o is in contact with the notch edge 77 of the slide plate 19. As shown in FIG. The IC card 6 is manually inserted through the card insertion slot 5 with the side where the portion 8 is exposed facing upward. The shutter 17 is automatically pushed open by the insertion force of the IC card 6, and the IC card 6 is inserted while being pushed toward the reference side wall 21 by the pressing force of the leaf spring 2o.

Since the IC card 6 is inserted manually, it is not necessarily inserted perpendicularly to the card insertion slot 5, but may be inserted obliquely to the card insertion slot 5. If it is inserted at an angle in this way, the free end 59 of the leaf spring 20 will be excessively pressed by the tip of the IC card 6, permanently deforming it, and the pressing force toward the reference side M2i will decrease or become severe. Sometimes the pressing force is zero. In order to prevent this free end portion 59 from deforming, a deformation prevention portion 78 is disposed between the base end portion 58 and the free end portion 59 of the leaf spring 20, as shown in FIG. In this embodiment, the deformation preventing portion 78 is formed integrally with the case body 2.

The IC card 6 is inserted along the flat part 53 of the slide plate 19, and its tip passes through the gap between the contact pin 43 of the carriage 11, which is waiting in the upper position, and the slide plate 19, and is inserted into the slide plate 19 as shown in FIG. Also, as shown in FIG. 16, it abuts against the abutment rib 55. As shown in FIG. 14, the carriage tensioning portion 57 is provided in the abutting rib 55, so if the IC card 6 is curved along the radial direction (direction perpendicular to the insertion direction) , as shown in FIG.
9, the deformation is corrected to some extent.

When the IC card 6 is further inserted with the tip of the IC card 6 in contact with the contact rib 55, the slide plate 19 moves together with the IC card 6 against the tensile force of the slide plate return spring 75.

FIG. 29 shows the slide plate 19 when the IC card 6 is inserted.
FIG. 2 is a diagram showing the operation of the carriage 11. FIG.

In the second figure, the solid line shows the positional relationship in the standby state, the dotted line shows the state in the middle of insertion, and the dashed line shows the positional relationship in the completed insertion state.

As shown in the figure, in the standby state, the slide plate 19
The carriage tensioning portion 57 is connected to the first pin 4 of the carriage 11.
It is far from 4. And as mentioned above, slide plate 1
9 moves, the carriage tensioning section 5 moves as shown by the broken line.
7 comes into contact with the first pin 44. Further movement of the slide plate 19 causes the carriage 11 to move toward the IC card while the carriage tensioning portion 57 remains in contact with the first pin 44.
move in the insertion direction of the card 6.

While the carriage 11 is moving in the insertion direction of the IC car 86, the carriage 11 moves toward the guide portions 49 and 50 as shown in FIG.
．． 51. As the carriage 11 descends, each contact bottle 43 comes into elastic contact with the terminal portion 8 of the IC card 6 on the slide plate 19.

Further, as described above, the carriage tensioning section 57 of the slide plate 19 moves, and near the end of the movement, the carriage tensioning section 57 moves to the connecting side l of the hook driving body 15! 31. Further movement of the slide plate 19 causes the hook driving body 15 to move slightly away from the case front 4. on the other hand.

The lock lever 14 is connected to the coil spring 7 via the drive pin 25.
2, it is always urged to rotate counterclockwise as shown by the arrow in FIG. Therefore, the hook driver 1
5 moves as described above, lock lever 1
4 rotates in the direction of the arrow, and the stopper stepped portion 24 engages with the tip of the second side wall 30 of the hook driver 15. Due to this engagement, the hook driving body 15 cannot return even if the tensile force of the slide plate return spring 75 is applied, and maintains its position. By retracting the hook driver 15 in this way, the bin portion 41 of the hook 16 is moved as shown in FIG.
is released from the locking part 36, ascends the hook driving slope part 34, and is finally located at the upper part of the hook driving slope part 34. If this happens, the blocking part 40 of the hook 16 will close to the card insertion slot 5.
and prevents the IC card 6 from being removed. That is, the IC cart 6 is held between the closing portion 40 of the hook 16 and the abutment rib 55 of the slide plate 19.

Further, by rotating the lock lever 14 mentioned above, the pressing part 2
8 moves away from the sensing end 27 of the microswitch 13, thereby removing the IC from the microswitch 13.
A signal indicating completion of card setting is output.

With the IC card 6 set in the predetermined position, the external device connected via the connector 9 and the
A signal is given between the C card 6 and the C card 6.

When the provision of the signal is completed, the plunger 12 is instantaneously energized based on the completion signal from the external device. Then, as shown in FIG. 28, the drive pin 25 is pulled toward the plunger 12, and the lock lever 14 is rotated clockwise. This rotational movement causes the stopper step portion 24 to come off the tip of the second side wall 30. Then the hook driver 15
loses its support, and the hook driving body 15 moves toward the card insertion slot 5 by the tensile force of the slide plate return spring 75.

As the hook driving body 15 moves (forward), the pin portion 41 of the hook 16 moves downward along the hook driving inclined portion 34 as the hook 16 rotates, as shown in FIG. As the body 15 moves forward, the pin portion 41 is inserted under the locking portion 36, and the hook 16 is maintained in the open state.

Further, the slide plate 19 moves in the return direction due to the tensile force of the slide plate return spring 75, and the carriage 11 moves away from the IC card 6 and returns to the home position. Furthermore, as the slide plate 19 moves, the IC
The card 6 is ejected so as to partially protrude from the card insertion slot 5. The IC card 6 can be pulled out from the card reader/writer 1 by holding this protruding part.

30 to 35 are diagrams for explaining the relationship between the plunger gear of the plunger 12, various loads, and suction forces.

As shown in FIG. 2, a coil spring 72 is hung on the drive pin 25 of the plunger 12, and the pressing portion 28 of the lock lever 14 is adapted to engage with the microswitch 12, and the lock lever 14 has a hook. Drive body 15
(See Fig. 28). Therefore, when the plunger 12 is energized to move the drive bin 25, the coil spring 72 and the sensing end 27 (plate spring) are engaged with each other.
and the hook driver 15 serve as resistance (load).

In FIGS. 30 to 35, line a indicates the plunger 12.
In the attraction force characteristic line, the attraction force rapidly increases as the plunger gap of the plunger 12 becomes narrower.The line is a load characteristic line for operating the microswitch 13, and point b' is the inversion region of the switch. Line C is a load characteristic line for compressing the coil spring 72, line d is a load characteristic line for separating the stopper step portion 24 from the hook driver 15, and the line is 2 points d.
' This is the starting point of movement of the stopper step 24 away from the hook driver 15. Line e indicates the card setting position, and line f (see FIGS. 31, 33, and 35) is a total load characteristic line for the microswitch 13, coil spring 72, and stopper step 24.

FIG. 30 shows a case where the reversal area b' of the microswitch 13 is located on the side of the card set position e with respect to the movement start point d' of the stopper stepped portion 24.

That is, it shows the positional relationship of each load when the stopper step portion 24 separates from the hook driving body 15 and starts moving, and then the microswitch 13 is reversed. FIG. 31 is a diagram showing the relationship between the total load characteristic 1IAf of each load and the suction force retention property 11a of the plunger 12.

Further, FIG. 32 shows the inversion area b' of the microswitch 13.
The figure shows the positional relationship of each load when is positioned above the movement start point d' of the stopper step portion 24, that is, when the reversal operation of the microswitch 13 and the start of movement of the microswitch 13 are performed at the same time. . FIG. 33 is a diagram showing the relationship between the total load characteristic line f of each load and the attraction force characteristic line a of the plunger 12.

As mentioned before, the operation of the plunger 12 drives the microswitch 13 and also locks the lock lever 1.
4 is separated from the hook driver 15, but in principle, at what point after the IC card 6 is set, should the microswitch 13 be reversed and at what point should the lock lever 14 be driven? Optional. However, if the operating points of the microswitch 13 and the lock lever 14 are in the relationship shown in FIGS. 30 and 32, the total load characteristic line f as shown in FIGS. 31 and 33
, a part of which protrudes beyond the attraction force characteristic line a of the plunger 12. The fact that the total load characteristic i1f stands out in this way means that the plunger 12 cannot be driven reliably, and a plunger with a larger suction force is required, which increases the size of the device and the increase in power consumption. This also results in higher costs.

On the other hand, in the present invention, as shown in FIG. 34, the reversal area b' of the microswitch 13 is moved toward the side opposite to the card setting position e with respect to the movement start point d' of the lock lever 14, that is, the movement of the lock lever 14 is After the start, the reversing operation of the microswitch 13 is performed. Then, as shown in FIG. 35, the total load characteristic line f becomes the attraction force characteristic of the plunger 12! ! It will be located below a. In this way, the total load characteristic line f is
The fact that it is located below the attraction force characteristic line a means that
This shows that the plunger 12 can sufficiently drive the microswitch 13, the lock lever 14, and the coil spring 72. Therefore, operational reliability can be improved, and miniaturization, power saving, and cost reduction can be achieved.

In the above embodiment, the case of an IC card was explained, but
The present invention is not limited thereto, and can also be applied to card readers/writers for other cards such as magnetic cards and optical cards.

[Effects of the Invention] As described above, the present invention securely prevents deformation of the card insertion slot by pressing the engaging portion provided below the card insertion slot with a presser piece of the mechanically strong bottom plate. It can be corrected.

Therefore, it is possible to smoothly insert and remove a card from the card insertion slot, and to provide a card reader/writer with high operational reliability.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an IC card reader/writer according to an embodiment of the present invention, Fig. 2 is a plan view of the IC card reader/writer with some upper parts removed, and Fig. 3 is an IC card reader/writer. A front view of the writer. FIG. 4 is a bottom view of the IC card reader/writer with the bottom plate removed. FIG. 5 is a bottom view of the lock lever. FIGS. 6 and 7 are a side view and a plan view of the hook driver 15. , FIGS. 8 and 9 are diagrams for explaining the operation of the hook driving body and the hook, and FIGS. 10 and 11 are a plan view and a side view of the carriage. 12 and 13 are diagrams for explaining the moving state of the carriage, and FIG. 14 is a plan view of the slide plate. Figure 15 is Figure 14 A-A4! Enlarged cross-sectional view above, 1st
6 is an enlarged sectional view taken along the line BB in FIG. 14, and FIGS. 17 and 18 are a plan view and a side view of the leaf spring. FIG. 19 and FIG. 20 are a plan view and a side view of the bottom plate. FIG. 21 is a partial plan view showing a modified example of the bottom plate, and FIG. 22 is a rear view of the case front. Fig. 23 is a cross-sectional view taken along the line C-C in Fig. 22, Fig. 24 is a cross-sectional side view showing a modification of the case front, and Figs. 25 and 26 show the bottom plate and the printed circuit board. 27 is an explanatory diagram showing the state of the microswitch, plunger, lock lever, and hook driver before inserting the IC card. FIG. An explanatory diagram showing the states of the switch, plunger, lock lever, and hook driver; FIG. 29 is an explanatory diagram showing the operation of the slide plate and carriage upon insertion of an IC card; FIGS. 30 to 35 are diagrams showing the plunger FIG. 3 is a diagram for explaining the relationship between the plunger gear, various loads, and suction force. 1...IC card reader writer, 2...Case body, 3...Bottom plate, 4...Case front, 5...Card insertion slot, 6 ...IC
Card, 9... Connector, 1o... Printed circuit board, 11... Carriage, 12... Plunger,
13...Micro switch, 14...Rosi lever, 15...Hook driver, 16...Hook, 19...Slide plate, 20...Plate spring, 21... Base 4 walls, 24. Stopper step,
25... Drive bottle, 26... Square hole. 27...Detection end, 28...Press portion, 29...
...First side wall, 30... Second side wall, 34...
...Hook driving inclined part, 36...Locking part,
4o... Obstruction part, 411. ...Bin part, 42...
- Carriage body, 48... Carriage guide section, 55
...Abutting rib, 58... Base end portion, 59...
...Free end, 62...Horizontal rib. 63... Protrusion, 66... Holding piece, 67...
... Engaging portion, 73... Carriage return spring,
75... Slide plate return spring, 78... Deformation prevention part, 79... Horizontal part. Figure 3 Figure 5 Figure 8 Figure 9 Figure 10 Figure 4j '1.5 12th
Figure 13 Figure 15 Figure 5? Figure 16 Figure 17 Figure 20 Figure 18 Figure 22 Figure 25 Figure 26 Figure 30 Plunger gap (mm) Figure 31 Plunger gap (mm) Figure 32 Plunger gear (mm) Figure 33 Plunger gap ( mm) Fig. 34 Plunger gap (mm) Fig. 35 Plunger gap (mm)

Claims (4)

[Claims] (1) In a card reader/writer in which a case front molded from synthetic resin and having a card insertion slot is provided on the front surface of the case body, and a metal bottom plate is arranged on the bottom surface of the case body, the card on the case front A card reader/writer characterized in that an engagement part is provided below the insertion opening, a presser piece is provided protruding from the case front side of the bottom plate, and the engagement part is pressed by the presser piece of the bottom plate. (2) The card reader/writer according to claim (1), wherein the engaging portion is formed in a groove shape, and the presser piece is fitted into the groove-shaped engaging portion. (3) In claim (1) or claim (2),
A card reader/writer characterized in that the width of the engaging portion is approximately the same as the width of the card insertion slot. (4) In claim (1) or claim (2),
A card reader/writer characterized in that the engaging portion is formed at least at a position corresponding to approximately the widthwise center of the card insertion slot.