JP3150283B2 - Head support mechanism and carder using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head support mechanism for a magnetic card reader for reproducing or recording information recorded on a magnetic card, and a card using the same.
It is about da.

[0002]

2. Description of the Related Art A magnetic card reader widely used for payment of various devices and other uses by reading information recorded on a magnetic card is, for example, a manual magnetic card reader used for a public telephone or the like. And a card reader device having a drive source such as a motor. Conventional magnetic card readers have a support mechanism in which a magnetic head is bonded to a leaf spring and the above-mentioned leaf spring is supported by pins in order to swing and support the magnetic head freely up and down.
A magnetic head such as a type in which a magnetic head inserted into a guide hole is urged by a rod-shaped urging member such as a spring, or a method in which urging by a spring is applied to only one side before and after the magnetic head to save space. There was a magnetic card reader using a head.

[0003] bonding a magnetic head to the plate spring, the plate
In the case of a supporting mechanism in which a spring is supported by a pin, for example, as shown in FIGS. Are supported by the pins 5 and 6 implanted on the support plate 7 at two points on the left and right sides. Leaf spring 3
A small hole 3a and a long cutout hole 3b are formed on the central axis AA of the magnetic head 1, and the pins 5 and 6 are inserted through the holes.

In the conventional magnetic head support mechanism described above, when the magnetic card 4 is inserted into the magnetic card reader, the leaf spring 3 moves up and down,
This mechanism swings about the central axis AA in a direction perpendicular to the central axis AA. However, in order to correctly transmit and receive the information of these devices, it is necessary to deal with a deformed magnetic card or a curved state of the magnetic card. Therefore, the present applicant has filed a Japanese Utility Model Application No. 53-99614 (Japanese Utility Model Application No. 62-12). )
In view of these circumstances, a proposal has been made with a magnetic head holding mechanism that allows the magnetic head to move up and down and swing, and obtains desired effects.

[0005]

However, in the biasing means using these leaf spring-shaped biasing springs, the spring constants of these biasing means are made as smooth as possible in the front-rear direction of the magnetic head. In addition, a corresponding space is required to extend the support limit, and this has been an alienation factor for downsizing the magnetic card reader. This is particularly remarkable in a manually inserted magnetic card reader, and there has been a long-awaited demand for miniaturization to minimize the space in front of the magnetic head.
Further, in the conventional plate spring configuration, a "squeal" phenomenon such as a chattering sound due to micro-vibration is likely to occur in the magnetic head 1 as the magnetic card slides. Further, in the method in which the spring pressure is applied only to one side, the front and rear of the magnetic head are unbalanced, and it is not possible to maintain good operability and head touch at the time of inserting a card.

The present invention has been made in view of the above circumstances, and requires less space than a configuration in which only a leaf spring is used as a biasing means for a magnetic head, and can contribute to downsizing. To minimize the space in front of the magnetic head in a magnetic card reader of the type and to prevent the occurrence of "squeal" phenomena such as chattering noise due to micro-vibration of the magnetic head accompanying the structure of the leaf spring. Aim.

[0007]

In order to achieve the object, according to the first aspect of the present invention, a head for reproducing or recording data from a magnetic card is attached to a leaf spring. Both sides 2 of the head with respect to the running direction
In a head supporting mechanism configured to support the head at a position, the length of the leaf spring in the card traveling direction is set to be longer on one side and shorter on the other side with respect to the head, and the head of the leaf spring is one side of urging the urging force of the elastic force of the plate spring itself to the card side to the head
While being given, the other side of the head of the plate spring biases the card side the plate spring in the coil spring, the f
One side of the pad is a leaf spring and the other side is a coil spring.
The card is biased to the card side .

According to a second aspect of the present invention, the other side of the leaf spring is formed by bending to form a spring receiving portion having increased rigidity, and the spring receiving portion receives the coil spring. That is the gist.

According to a third aspect of the present invention, the leaf spring is provided
The gist of the present invention is that the two pin members are mounted on a support plate while being supported by one pin member, and the coil spring is interposed between the support plate and the spring receiving portion.

According to a fourth aspect of the present invention, the support mechanism for the magnetic head according to the first aspect is disposed near a magnetic card insertion slot of a magnetic card reader, and is biased by the coil spring on the other side. Is the card insertion slot.

The invention described in claim 5 is characterized in that the supporting position of the leaf spring on one side is closer to the card passage than the other side.

[0012]

Next, an embodiment of a support mechanism for a magnetic head according to the present invention will be described based on an embodiment shown in the drawings.

FIG. 1 is a plan view of a magnetic head support mechanism showing an embodiment of a magnetic head support mechanism in a magnetic card reader according to the present invention, FIG. 2 is a front view of the magnetic head support mechanism, and FIG. FIG. 3 shows an enlarged view of a coil spring portion. In these figures, a description will be given of a case where the magnetic head support mechanism according to the present invention is used in a device such as a public telephone, for example, and is applied to a manual magnetic card reader for manually inserting and extracting the magnetic card 4. .

The magnetic head supporting mechanism 20 is disposed near the magnetic card insertion slot 10a of the magnetic card reader 10,
The magnetic head 21 is fixed to the leaf spring 23 by the adhesive 2. As shown in FIG. 1, the leaf spring 23 moves with respect to the central axis XX of the magnetic head 21 in the card running direction.
The length P of the leaf spring at a position away from the insertion direction of the magnetic card 4 on one side of the traveling direction of the magnetic card 4 is changed to the length Q of the leaf spring at a position close to the insertion direction of the magnetic card 4 on the other side. The length P on one side is longer than the length Q on the other side
Is set short, and the length P portion of the one-sided leaf spring is
The biasing force is applied to the magnetic head 21 by the elastic force of the leaf spring 23 itself. FIG. 1 showing the position of the length Q of the other side of the leaf spring 23
The upper and lower ends are bent toward the opposite sides of the magnetic card path to increase rigidity and form a spring receiving portion.

In the spring receiving portion formed on the other side,
A coil spring 31 is provided near the magnetic head 21,
The coil spring 31 is disposed near the insertion slot of the magnetic card reader 10, and as shown in FIG.
A small hole 27a is provided in the center of the pin, the pin 26 is inserted, and the coil spring 31 is inserted into the spacer 27, and the coil spring 31 is interposed between the spring receiving portion of the leaf spring 23 and the support plate 28. A biasing force is applied to the magnetic head 21 together with one side of the leaf spring 23. The spring pressure of the coil spring 31 is set to be equal to the elastic force of the leaf spring 23 so as to maintain a balance against the vertical movement of the magnetic head.

On the central axis XX of the magnetic head 21,
Small holes 23a and 23b are formed. Pins 25 and 26 are erected on the support plate 28 at positions corresponding to the center axis XX of the magnetic head 21, and the small holes 2 are provided.
3a and 23b are fitted into the pins 25 and 26, respectively. The other ends of the pins 25 and 26 are respectively connected to the center axis X with respect to the frame 32 of the magnetic card reader.
It is fixed corresponding to the position along -X.

The supporting position R of the leaf spring 23 on the one side by the pin 25 is closer to the magnetic card passage with respect to the supporting position S on the other side by the pin 26, and lower than the position of the coil spring 31. By setting the elastic force of the leaf spring 23 and the elastic force of the coil spring 31 to be equal, when the magnetic card 4 is inserted, the magnetic head 21 is inclined to the opposite side of the insertion slot. Has been prevented.

With the above configuration, the length of one side of the leaf spring 23 in the traveling direction of the magnetic card 4 with respect to the magnetic head 21 is increased, and the length of the spring receiving portion formed on the other side is set short. Since the magnetic head 21 is arranged near the magnetic card insertion slot and the coil spring 31 is interposed between the spring receiving portion of the leaf spring 23 and the support plate 28, an extremely small space can be realized. .

Further, the supporting position P of the leaf spring 23 on one side is set closer to the magnetic card passage with respect to the supporting position Q on the other side, and lower than the position of the coil spring 31. By setting the elastic force of the leaf spring 23 and the elastic force of the coil spring 31 to be equal,
When the magnetic card 4 is inserted, the magnetic head 21 is unlikely to be inclined to the opposite side of the insertion slot, and good head touch can be maintained.

Further, as described above, the support position P of the leaf spring 23 is set below the position of the coil spring 31, and the coil spring 31 is interposed between the spring receiving portion of the leaf spring 23 and the support plate 28. As a result, the contact area between the coil spring 31 and the leaf spring 23 can be increased, so that even when the magnetic card 4 is inserted, the magnetic head 2
The occurrence of the "squeal" phenomenon can be prevented without the occurrence of chatter due to the micro vibration.

[0021]

As described above, in the magnetic head support mechanism of the present invention, the magnetic head for reproducing or recording data from the card is attached to the leaf spring, and the leaf spring is moved in the card running direction. in the magnetic head supporting mechanism comprising configured to support the magnetic head on both sides two positions of the magnetic head, the length of the pre Symbol plate spring against the magnetic card travel direction relative to the magnetic head one side The other side is set to be long and the one side is configured to apply a biasing force to the magnetic head by the elastic force of the leaf spring itself, while the other side is configured to bias the leaf spring by a coil spring. Thereby, the space becomes smaller than the configuration in which only the leaf spring is used as the urging means of the magnetic head, which can contribute to downsizing. Tree "the occurrence of the phenomenon can be prevented.

Further, since the other side of the leaf spring is formed by bending to form a spring receiving portion having enhanced rigidity, and the coil receiving portion is configured to receive the coil spring, the thin leaf spring becomes strong. , Also contributes to the prevention of micro-vibration.

Further, since the leaf spring is supported by two pin members and the two pin members are attached to the support plate, and the coil spring is interposed between the support plate and the spring receiving portion, Good balance is maintained with respect to the vertical movement of the head.

Further, a head support mechanism is disposed near the card insertion slot of the card reader, and the other side, which is urged by the coil spring, is used as a card insertion slot. Since the card passage is closer to the other side, when the magnetic card is inserted, it is difficult for the magnetic head to be inclined to the opposite side of the insertion slot, and good head touch can be maintained. With the above configuration, a small space can be achieved and the card reader can be downsized. .

[Brief description of the drawings]

FIG. 1 is a front view of a support mechanism of a magnetic head according to an embodiment of the present invention.

FIG. 2 is also a plan view.

FIG. 3 is also a cross-sectional view of a main part.

FIG. 4 is a front view of a conventional magnetic head support mechanism.

FIG. 5 is also a plan view.

[Explanation of symbols]

 1, 21 Magnetic head 3, 23 Leaf spring 4 Magnetic card 5, 6, 25, 26 pin 10 Magnetic card reader 20 Magnetic head support mechanism 28 Support plate 31 Coil spring

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G11B 21/20

Claims (5)

(57) [Claims] 1. A head for reproducing or recording data from a magnetic card is attached to a leaf spring, and the head is supported at two positions on both sides of the head with respect to the card running direction of the leaf spring. In the head support mechanism, the length of the leaf spring in the card traveling direction with respect to the head is set to be longer on one side and shorter on the other side,
While one side of the leaf spring head elastic force of the plate spring itself is applied as a biasing force in the card side up <br/> SL head,
The other side of the head of the leaf spring urges the leaf spring to the card side by a coil spring , and one side of the head is
Leaf spring, the other side to the card side by coil spring
Head support mechanism, characterized in that the biasing. 2. The apparatus according to claim 1, wherein the other side of the leaf spring is formed by bending to form a spring receiving portion having increased rigidity, and the spring receiving portion receives the coil spring. 2. The head support mechanism according to 1. 3. The apparatus according to claim 2, wherein said leaf spring is supported by two pin members, said two pin members are attached to a support plate, and said coil spring is interposed between said support plate and said spring receiving portion. The head support mechanism according to claim 2, wherein 4. The card supporting mechanism according to claim 1, wherein the head supporting mechanism is disposed near a card insertion slot of the card reader, and the other side of the head that is urged by the coil spring is a card insertion slot. Card reader. 5. The card reader according to claim 4, wherein the supporting position of the leaf spring on one side is closer to the card passage than the other side.