JP2557451B2 - Dustproof and shield structure for IC card reader / writer - Google Patents

Description

The present invention relates to a reader / writer that reads and writes information from and into an IC card that has a semiconductor integrated circuit (IC) built into a card or the like and has memory and arithmetic functions. Involved in
In particular, the present invention relates to a dustproof and shield structure in an IC card mounting mechanism section in which electrical connection is made non-contact when supplying power to an IC card and transmitting / receiving a data signal.

[Conventional technology]

Conventionally, by providing a field of vibration energy due to a high-frequency electromagnetic field or ultrasonic waves in a space, and absorbing and rectifying the energy in this field to form a DC power supply, a built-in battery or a power supply contact point in an IC card becomes unnecessary, and To exchange various data signals with the reader / writer, use a coupler such as an antenna or a coil, and by burying this coupler in an appropriate place on the IC card, all electrical contacts exposed to the outside of the IC card are exposed. There has been proposed an IC card system in which the electric connection between the IC card and the reader / writer is omitted without contact (for example, JP-A-58-154082).

In order to efficiently supply power to the IC card and input data signals when coupling the IC card that employs such a non-contact coupling method with the reader / writer, the coupler and reader / writer provided in the IC card should be used. It is desired that the position alignment with the coupler provided at the position is performed.

[Problems to be Solved by the Invention]

Therefore, when the IC card adopting such a non-contact coupling method and the reader / writer are coupled, a means for determining whether the front and back of the IC card and the inserting direction are proper is provided on the reader / writer side. It is necessary to determine this state only when it is in the proper positioning state and hold the IC card immovably and hold it so that power supply and data signal transfer to and from the IC card can be performed smoothly. is there. Therefore, these determination means and fixed holding means are
Each of them is configured to perform highly accurate operation by using electrical, mechanical or optical means.

However, since the IC card and the reader / writer are positioned in a non-contact manner with high accuracy, and the IC card mounting mechanism for realizing this is also required to be small in size and high accuracy is required. The structure is required to have a sufficient dustproof structure. In addition, since the electromagnetic coupling method that uses a coil as a coupler is adopted for non-contact transmission between the IC card and the reader / writer, there is a fear that this coil may cause magnetic induction disturbance to peripheral circuits.
In particular, such magnetically induced disturbance causes malfunction of the reader / writer. For this reason, in this type of reader / writer, it is desired that a more complete magnetic shield structure and dustproof structure can be realized easily and at low cost, especially for a mechanical part for mounting an IC card.

Therefore, an object of the present invention is to provide an IC card with a coil as a signal input means and an output means, respectively.
In a reader / writer for a non-contact IC card configured to read and write information by electromagnetically coupling with each coil, with respect to a mechanism part for detachably mounting an IC card,
An IC that has a simple structure and effectively exhibits a reliable dustproof effect and magnetic shield effect, and can be manufactured at low cost.
An object is to provide a dustproof and shield structure for a card reader / writer.

[Means for solving the problem]

The dustproof and shield structure of the IC card reader / writer according to the present invention includes a head core for transmitting and receiving signals corresponding to an input coil and an output coil built in the IC card at a predetermined position on the bottom of the front inner surface of the casing body. A receiver coil is fixedly arranged, a circuit board for operation as a reader / writer is attached to the outer surface of the back side of the casing body, and an IC card insertion with an opening / closing door for inserting an IC card is made on the front side of the casing body. The mouth panel is attached, and an IC card with a space for installing the head core and the space for installing the receiving coil on the inner surface on the front side of the casing body made of a material with high conductivity and a pair of guide members on both sides is attached. Is mounted on the casing body, and the IC card mounting mechanism is formed by mounting a substrate for mounting the lid plate on the pair of guide members. It is characterized in that it is housed on the inner surface of the front side, and a shielding plate formed of a non-magnetic and high-conductivity galvanized steel plate is fitted into a groove provided in the peripheral portion of the casing body to seal the upper portion of the casing body. .

[Action]

According to the dustproof and shield structure of the IC card reader / writer according to the present invention, in the IC card reader / writer according to the non-contact coupling method, the head core and the receiving core for exchanging signals provided in the casing body are provided to the outside. Although it is a source of magnetic induction disturbance, the head main body and the receiving core are formed by forming the casing main body with a material having a high electric conductivity and sealing the casing main body with a shielding plate formed with a material having a high electric conductivity or magnetic permeability. By effectively achieving a magnetic shield against, and by further sealing the casing body with such a shielding plate,
This contributes to dust prevention for the IC card mounting mechanism provided inside, and it is possible to maintain a highly accurate and stable operation of this type IC reader / writer for a long time.

〔Example〕

Next, an embodiment of a dustproof and shield structure of a reader / writer according to the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is an exploded perspective view showing an embodiment of a casing member of a reader / writer implementing the dustproof and shield structure of the present invention. In FIG. 1, reference numeral 10 indicates a casing body, which is processed by die casting using aluminum having high conductivity, for example. On the inner surface of the casing body 10 (front side in the drawing), input / output means and mechanical components for accommodating the IC card in an appropriate state to supply and receive electric power and data are stored and arranged, A printed circuit board for performing an operation as a reader / writer is attached to the outer surface (back side not shown). Further, reference numeral 12 indicates a substrate on which the IC card is mounted, and is made of an insulating material such as synthetic resin. The board 12 is attached to the casing body 10 at a predetermined position by a screw tool 14, respectively.
Further, reference numeral 16 indicates an IC card insertion panel, which is formed by molding a synthetic resin material or the like,
It is bonded and fixed to one side of 10. The IC card insertion panel 16 has an insertion opening 20 provided with an openable / closable opening / closing door 18 for inserting an IC card, an indicator lamp 22 showing the operating state of the reader / writer, and taking out the IC card. And a guide hole 24 through which one end of the eject lever is inserted and arranged. Reference numeral 26 is the casing body.
10 shows a shielding plate for sealing the front side, for example composed of a non-magnetic galvanized steel sheet having a large conductivity, a dust-proof effect for various mechanisms provided inside the casing body 10 and a magnetic shield effect for a magnetic derivative. Have. Therefore, the shield plate 26 is fitted into the groove portion 28 provided in the peripheral portion of the casing body 10, and is securely fixed by the screw tool 29.

In FIG. 1, the board 12 is provided with a space 50 for installing a head core and a space 52 for installing a receiving coil, respectively, at positions corresponding to the input coil and the output coil incorporated in the IC card. Then, the bottom predetermined positions 50 ', 5 of the casing body 10 corresponding to the substrate 12
The head core and the receiving coil are fixedly arranged with respect to 2 '.

FIG. 2 shows an embodiment of an IC card preferably used in a reader / writer embodying the present invention. That is, in FIG. 2, reference numeral 30 indicates an IC card, and a storage / storage device including a single or a plurality of semiconductor integrated circuits therein.
A printed circuit 32 having a circuit configuration of arithmetic elements is provided.
The IC card 30 also has an air-core input coil 34 for receiving power from the outside and inputting a required data signal, and an empty core for outputting a required data signal from the printed circuit 32 to the outside. The core output coils 36 are built in at appropriate positions separated from the printed circuit 32. The input coil 34 and the output coil 36 are connected to the printed circuit 32 by lead wires 38, respectively.
In the IC card 30 configured in this manner, a space that can accommodate the printed circuit 32, the input coil 34, the output coil 36, and the lead wire 38 is provided in advance on the synthetic resin substrate, and each of the above-mentioned spaces corresponding to these spaces is provided. After the components are mounted, they can be easily molded by coating with a synthetic resin coating material by a known laminating method or joining method.

The IC card 30 thus configured has notches 40 and 42 on both side edges in the longitudinal direction. in this case,
One notch portion 40 is provided at a substantially middle portion of the IC card 30, and the other notch portion 42 is provided so as to be slightly deviated from the notch portion 40 to the tip side. These cutouts 40, 42 are provided in the IC card mounting portion of the reader / writer with a detection mechanism that can be mechanically fitted into the cutouts 40, 42, thereby determining the proper state of the IC card 30. The detection is performed and the IC card 30 is mechanically fixed and held. That is, in the IC card 30 of this embodiment, the input coils 34 having different functions are used.
The output coil 36 and the output coil 36 are built in asymmetrically, and are compatible with the corresponding input / output means provided in the reader / writer only in a fixed state (the front side of the IC card and the insertion direction into the reader / writer are determined). Become.

FIG. 3 shows an embodiment of a reader / writer provided with a detection mechanism suitable for use of the above-mentioned IC card 30, and shows a state in which the reader / writer is housed and arranged inside the casing body 10 shown in FIG. It is a principal part top view. The outline of the configuration shown in FIG. 3 is as follows. That is, the protective cover plate 62 is mounted on the guide side plates 60, 60 as guide members provided on both sides of the substrate 12 shown in FIG. 1, and the upper surface of the cover plate 62 is integrated with the insertion of the IC card. A slide plate 64 that is slidably displaced is provided on the. In this way, the IC card insertion opening 66 is formed at one end of the IC card insertion portion formed by the substrate 12 and the cover plate 62. Therefore, the cover plate 6 is provided so as to correspond to the excised portions provided in advance on the guide side plates 60, 60 of the substrate 12.
The first cutout portion 68 and the second cutout portion 7 are provided on both side edge portions of 2 respectively.
0 is provided, and a notch step portion 72 is provided on one edge of the slide plate 64.
To provide. Then, the first lock lever 74 elastically held corresponding to the first cutting portion 68 and the second cutting portion 70.
And a second lock lever 76 is provided. However, when the IC card configured as shown in FIG. 2 is inserted into the lock levers 74 and 76 from the IC card insertion opening 66, the tips of the lock levers 74 and 76 engage with the tip locking portions 78 of the slide plate 64. Then, the IC card moves forward together with the slide plate 64 to a predetermined position. At this time, if the notches (40, 42) provided on the IC card are aligned with the first cutout 68 and the second cutout 70, the first cut
The notch step portion 72 of the slide plate 64 is located at the cutout portion 68, the lock pin 80 provided on the first lock lever 74 is fitted into one notch portion (40) of the IC card, and the slide plate 64 is extended. Part presses and displaces the second lock lever 76, and its locking piece 84
Is inserted into the other notch (42) of the IC card. In this way, the IC card can be fixed and held in an appropriate state. In FIG. 3, reference numeral 86 is a slide plate.
This is a limit switch that can be activated by contact with its extension when the IC card 64 moves forward and detect that the IC card has been set in an appropriate state. Further, an eject lever 88 for taking out the set IC card is provided for the first lock lever 74, and the eject lever 88 is set while the reader / writer is operating.
An interlock mechanism 90 that operates so as to prohibit the removal of the IC card is provided. Further, reference numeral 92 is IC
Although a head coil for electromagnetically coupling with the input coil of the card is shown, the receiving coil for electromagnetically coupling with the output coil of the IC card is located under the substrate 12 and is not shown.

Therefore, by fitting and fixing the shielding plate 26 shown in FIG. 1 in the groove portion 28 provided in advance on the upper surface of the casing body 10 configured as described above, the IC card mounting mechanism portion described above is completely removed. Can be sealed.

〔The invention's effect〕

As is apparent from the above-mentioned embodiments, according to the present invention,
The casing body is made of a material with a high electrical conductivity, and the IC card mounting mechanism, which is the main part of the IC card reader / writer, is placed inside the casing body, and then a material with a high electrical conductivity or magnetic permeability is placed above it. It was installed inside the casing body by sealing it with a shielding plate composed of
Dust protection for the IC card mounting mechanism can be achieved easily and surely, and the shield effect against the magnetism leaked from the coupler that electromagnetically couples with the non-contact IC card is demonstrated, and the inductive obstacle to the outside is surely prevented However, malfunction prevention of the reader / writer can be easily realized at low cost.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and it goes without saying that various design changes can be made without departing from the spirit of the present invention. .

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a casing member of the reader / writer showing an embodiment of the dustproof and shield structure of the IC card reader / writer according to the present invention, and FIG. 2 is preferably used for the IC card reader / writer of the present invention. Perspective view of a smart card, No. 3
FIG. 1 is a plan view of essential parts showing a state in which an IC card mounting mechanism is incorporated in the casing member shown in FIG. 10 …… Casing body, 12 …… Substrate 14 …… Screw tool, 16 …… IC card insertion panel 18 …… Opening / closing door, 20 …… Insertion port 22 …… Indicator lamp, 24 …… Guide hole 26 …… Shielding Plate, 28 ... Groove 29 ... Screw, 30 ... IC card 32 ... Printed circuit, 34 ... Input coil 36 ... Output coil, 38 ... Lead wire 40, 42 ... Notch 50 ... Head core Installation space 52 …… Reception coil installation space 60 …… Guide side plate, 62 …… Lid plate 64 …… Slide plate, 66 …… Insertion port 68 …… First cutout part, 70 …… Second cutout part 72 …… Notch step, 74 …… First lock lever 76 …… Second lock lever, 78 …… Locking part 80 …… Lock pin, 82 …… Extending part 84 …… Locking piece, 86 …… Limit switch 88 …… Eject lever 90 …… Interlock mechanism 92 …… Head core

Claims (1)

(57) [Claims] 1. A head core and a receiving coil for transmitting and receiving signals corresponding to an input coil and an output coil built in an IC card are fixedly arranged at a predetermined position on the bottom of the front inner surface of the casing main body, A circuit board for operation as a reader / writer is attached to the outer surface on the back side, and an IC card insertion panel with an opening / closing door for inserting an IC card is attached to the front surface of the casing body. A casing body having a head core installation space and a reception coil installation space on the front inner surface, and a pair of guide members on both sides.
An IC card mounting mechanism, in which a board for mounting an IC card is mounted and a lid plate is mounted on the pair of guide members, is housed and arranged on the front inner surface of the casing body, and is non-magnetic and has high conductivity zinc plating. A dustproof and shield structure for a reader / writer for an IC card, characterized in that a shielding plate formed of a steel plate is fitted into a groove provided in a peripheral portion of the casing body to seal an upper portion of the casing body.