JP2574436Y2 - Card sensor light receiving part dustproof cover - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION In the present invention, a sensor for detecting the insertion of an information recording card such as a telephone card is attached to a card sensor light receiving portion in order to prevent malfunction due to dust or dirt. Related to dust cover.

[0002]

2. Description of the Related Art Conventionally, in a telephone card public telephone, a card sensor is provided in a magnetic card unit inside the telephone card public telephone main body, detects the presence of an inserted telephone card, and reads the card reading head of the magnetic card unit. Are used to control the card capture operation for reading the card.

As shown in FIG. 4, this card sensor has a notch 1 for projecting a light beam which opens downward, and a light emitting portion 3 for a card sensor in which a light emitter 2 is provided in the notch 1 for projecting a light beam. And a card-sensor light-receiving section 6 having a light-incident notch 4 that opens upward, and a light-receiving body 5 provided in the light-incident notch 4. The passage of the telephone card 8 from the card slot 7 formed during this time is detected by the light passing through the card.

For this reason, when the telephone card public telephone is used for a long time in an environment where there is a lot of dust and dirt, dust and dirt coming in from the card slot 7 are above the card sensor light receiving part 6 located below the magnetic card unit. It is easy for light to accumulate in the cutout portion 4 for incidence of light, and these dusts and dirt adhere to the surface of the photoreceptor 5 and cause a malfunction that the card sensor photoreceptor portion 6 of the sensor is erroneously detected. I was

[0005]

SUMMARY OF THE INVENTION As described above, the present invention effectively prevents dust and dirt from getting into and accumulating in the light beam notch of the card sensor light receiving portion of the card sensor. It is an object of the present invention to provide means capable of preventing an erroneous detection of an information recording card such as a telephone card by a sensor.

[0006]

In order to solve the above-mentioned problem, the present invention employs means for mounting a dust-proof cover for covering the upper surface of the card sensor light receiving portion of the magnetic card unit. As a result, the telephone card is slid onto the dust-proof cover having a smooth surface, thereby effectively preventing dust and dirt from entering and accumulating in the light-receiving notch of the card sensor light-receiving unit. This is intended to prevent the telephone card from being erroneously detected by the card sensor.

That is, according to the present invention, an information recording card inserted between a card sensor light-emitting section and a card sensor light-receiving section is detected by a card sensor light-receiving section of a sensor device for detecting a light transmitted through the card. A dustproof cover for covering, which has a transparent top plate having a smooth surface that covers at least a sensor light receiving portion of the card sensor light receiving portion, and is inserted into and removed from one side of the card sensor light receiving portion .
Freely fitted, and at least one of the sensor light receiving portions
It is an object of the present invention to provide a card sensor light-receiving unit dust-proof cover which is formed so as to cover substantially the entire surface except for the side surface.

[0008] The dust-proof cover of the light receiving portion of the card sensor is integrally formed of a light-transmitting plastic or the like.
Can be .

[0009]

By using the dust-proof cover of the card sensor light-receiving unit having such a configuration, it is possible to prevent dust, dirt, and oil droplets from adhering or sticking to the cut-out portion of the sensor light-receiving unit for incidence of light rays. An information recording card such as a telephone card taken in from a card slot of a card unit can be correctly detected.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments.

FIG. 1 is a perspective view of a dust-proof cover 11 for a card sensor light receiving unit according to an embodiment of the present invention. One side (the front side in the figure) is open and the card sensor light receiving unit has an outer shape. It has an almost corresponding case shape.
FIG. 2 is a side view showing the rear side surface.

More specifically, a transparent top plate 12 having a smooth surface, a first bottom plate 14 for forming a thin space 13 substantially in the left half of the top plate 12 in the drawing, and a top plate 12 in the drawing Second bottom plate 1 forming a thick space 15 in almost half of the right side
6, an intermediate side plate 17 connecting the first bottom plate 14 and the second bottom plate 16, a left side plate 18 forming a side surface of the thin space 13, and a right side plate forming a side surface of the thick space 15. 19 and a rear plate 20 for sealing the rear side surface in the figure.

This card sensor light receiving unit dustproof cover 11
Can be easily made by integrally molding a plastic having good transparency.

This card sensor light receiving unit dustproof cover 11
Although there is no particular limitation on the thickness of the telephone card, a relatively thin one, for example, an ordinary telephone card is used as long as an appropriate strength can be obtained.

Next, the method of using the dust sensor cover 11 will be described with reference to FIG.

First, the dust-proof cover 11 of the card sensor light-receiving unit shown in FIG. 1 is attached to the card-sensor light-receiving unit 6 similar to that shown in FIG. And inserted as it is until the rear plate 20 hits the card sensor light receiving section 6. Thus, the card sensor light receiving unit 6 is covered with the transparent top plate 12.

As shown in FIG. 3, the card 8 to be inserted slides on the upper surface of the transparent top plate 12 from the card slot 7 so as to be inserted between the card sensor light emitting section 3 and the card sensor light receiving section 6. Inserted.

The transparent top plate 12 of the card sensor light-receiving unit dust-proof cover 11 has a relatively smooth surface, so that it is relatively hard to become dirty. , May be wiped off or replaced with a new one.

In the above-described embodiment, the dust cover for the card sensor light-receiving unit has been described as a case-shaped one having an opening on only one side and corresponding to the outer shape of the card sensor light-receiving unit. However, the shape is not limited to this. For example, the rear plate 20 is omitted, the first bottom plate 14, the second bottom plate 1
6. A part of the middle side plate 17, the left side plate 18, and the right side plate 19 may be omitted. In short, at least cover the surface smooth transparent top plate card sensor light receiving <br/> unit component, car
Can be inserted and removed from one side of the sensor
And at least one side of the sensor light receiving portion
What is necessary is just to be formed in the shape which covers almost the whole except for .

[0020]

As described in detail above, according to the present invention, the light receiving portion of the card sensor is covered with the transparent top plate having a smooth surface, so that the light receiving portion of the card sensor is easily contaminated with dust or dirt as in the conventional case. It is possible to solve the problem that the detection performance of the card sensor is deteriorated due to dirt.

Further, the card sensor dust cover is easy to attach and detach, and if it is cleaned after removal, it is possible to recover the deterioration of the detection performance of the card sensor caused by dirt due to dust and dirt, and the card sensor dust cover becomes excessively dirty. At times, the card sensor dust-proof cover itself can be replaced, so that handling is easy. Therefore, in practice,
Very convenient.

The dust cover of the card sensor of the present invention is applicable not only to telephone card public telephones but also to any vending machines using a card sensor of a type in which the detection of a card is performed by a light beam passing through the card. obtain.

[Brief description of the drawings]

FIG. 1 is a perspective view of a dust sensor cover of a card sensor light receiving unit of a magnetic card unit according to an embodiment of the present invention.

FIG. 2 is a side view of the card sensor light receiving unit dustproof cover of FIG. 1;

FIG. 3 is a side view showing a use state of the card sensor light receiving unit dustproof cover shown in FIG. 1;

FIG. 4 is a perspective view showing a usage state of a sensor device of a conventional magnetic card unit.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Notch part for light beam projection, 2 ... Light emitting body, 3 ... Light receiving part of card sensor, 4 ... Notch part for light beam incidence, 5 ... Light receiving body, 6 ... Light receiving part of card sensor, 7 ... Card slot, 8
... Telephone card, 11 ... Dust-proof cover for light receiving part of card sensor, 12 ... Transparent top plate with smooth surface, 13 ... Thin space, 1
4 first bottom plate, 15 thick wall, 16 bottom plate, 17
Middle side plate, 18 left side plate, 19 right side plate, 20 rear plate.

Claims (1)

(57) [Scope of request for utility model registration] A dustproof cover for covering a light receiving portion of a card sensor in a sensor device for detecting an information recording card inserted between a light emitting portion of the card sensor and a light receiving portion of the card sensor by a light beam transmitted through the card. A cover having a transparent top plate having a smooth surface that at least covers a sensor light receiving portion of the card sensor light receiving portion, and is fitted to the card sensor light receiving portion such that it can be inserted and removed from one side thereof, The
Almost the whole except for at least one side of the sensor receiver
A card-sensor light-receiving unit dust-proof cover, which is formed in a shape covering the card.