JPH0718558Y2 - Punch block - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a punch block for punching a magnetic card such as a prepaid card for the purpose of the remaining usable amount.

[Conventional technology]

FIG. 5 shows a conventional punch block, which includes a yoke 51 that covers the outside, a coil 52 housed inside the yoke 51, and a punch pin 53 for punching. The yoke 51 is formed in a hollow shape, and a guide hole 54 is formed in a central portion thereof. A single coil 52 is inserted in the hollow portion, and a punch pin 53 is inserted in the guide hole 54. A movable iron core 55 is integrally attached to the upper end of the punch pin 53, and the lower end of the punch pin 53 faces a die hole 57 of a die 56 attached to the lower end of the yoke 51.

In such a structure, the punching path (moving path) of the magnetic card C is provided between the die 56 and the yoke 51, and the magnetic card C
When the coil 52 is energized while is positioned on the die 56,
Since the magnetic attraction force acts on the movable iron core 55, the punch pin 53 moves toward the die 56 and a small hole can be punched in the magnetic card C. That is, this punch block is a movable iron core
It is a magnetic drive type that utilizes the magnetic attraction force generated between the 55 and the yoke 51.
Is used which has a predetermined coil cross-sectional area.

[Problems to be solved by the device]

Generally, in an electromagnetically driven punch block, it is necessary to increase the magnetic attraction force in order to give a sufficient punching force to the punch pin. For this reason, the conventional punch block is provided with the coil 52 along the moving direction of the punch pin 53 and is vertically long in order to secure a sufficient coil cross-sectional area without disturbing the winding state of the coil 52. In such a coil arrangement structure, since the height of the coil determines the height of the punch block, the punch block becomes vertically long, and a large vertical space is required for attachment to the card reader device. Therefore, there is a problem that the card reader device itself cannot be made thin.

The present invention has been made in consideration of such problems of the conventional punch block, and it is an object of the present invention to provide a punch block which can sufficiently secure a coil cross-sectional area and can be thinned. Has an aim.

[Means for Solving the Problems]

In order to achieve the above object, the present invention provides a yoke having a coil post, and a coil post wound around the yoke.
A coil that generates an electromagnetic attraction force based on power supply, a pressing arm that is attracted to the yoke based on the generation of the electromagnetic attraction force, a punch pin that is displaced by being biased by a suction operation of the pressing arm, and the displacement And a spring member for urging the punch pin in a direction to return the punch pin to the original position, and the coil posts are arranged in parallel along a direction orthogonal to the displacement direction of the punch pin,
A coil is wound around each of the coils, and the pressing arm is rotatably hindered at one end of the coil post extending in the juxtaposed direction.

Further, in the present invention, the attraction surface of the coil post is positioned lower than the end portion where the yoke regulates the rotation operation of the pressing arm, and the attraction due to the magnetization of the pressing arm to the coil post is prevented. I am trying to do it.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to illustrated embodiments.

FIG. 1 is a sectional view of a punch block according to an embodiment of the present invention, and FIG. 2 is a plan view thereof. The left and right two coil posts 3 and 4 standing upright from the bottom portion 2 and the side portions 5 and 6 provided outside the respective coil posts 3 and 4 with a gap therebetween are integrally formed, and the yoke 1 Is configured. The center portion of the left coil post 3 penetrates in the vertical direction, and the punch pin 9 is inserted into the through hole 3a. The punch pin 9 has its tip end advanced from the bottom portion 2 of the yoke 1 to punch a small hole in the magnetic card C, and the axial direction of the punch pin 9 is the punching direction for punching the magnetic card C. Reference numeral 10 is a return spring for urging the punch pin 9 in the anti-piercing direction. The punching by the punch pin 9 is performed by the magnetic attraction force, and the coils 7 and 8 for generating the magnetic attraction force are used for the coil posts.
A pressing arm 11 is provided above the punch pins 9 while being attached to the third and fourth punch pins 9.

The pressing arm 11 is rotatably supported by a pivot pin 12 attached to the right side portion 6 of the yoke 1. The pressing arm 11 is formed in a plate shape having a length that covers the entire upper portion of the yoke 1, and when the coils 7 and 8 are energized, the pressing arms 11 and the coil posts 3 and 4 to which the coils 7 and 8 are attached are formed. A magnetic attraction force is generated between them to rotate the punch pin 9 so as to press it in the punching direction.

In this case, since the pressing arm 11 is rotatable by the pivot pin 12 at one end in the arrangement direction of the coils 7 and 8, when the punch pin 9 is punched, the coil 8 is already pushed at the initial stage. It is close to and exerts sufficient magnetic attraction. In general, the punching operation requires a large punching force in the initial stage in which the tip of the punch pin 9 contacts the magnetic card C. Therefore, the magnetic attraction force can be effectively extracted in such a configuration. On the other hand, the side portion 6 on the left side of the yoke 1 corresponding to the rotating side end portion of the pressing arm 11 is formed to be slightly higher than the tops of the coil posts 3 and 4, and is pressed by the magnetic attraction force. When the arm 11 rotates, the pressing arm 11 comes into contact with the upper end surface of the side portion 6 and the rotation is stopped. Therefore,
Since the pressing arm 11 does not come into contact with the coil posts 3 and 4, the pressing arm 11 is not magnetized and attracted to the coil posts 3 and 4, and a smooth return operation is ensured when the energization is stopped. be able to.

In FIG. 1, reference numeral 13 is a die attached to the lower surface of the yoke 1, and the punch pin 9 moving downward by a magnetic attraction force faces the die hole 14 of the die 13 to punch the magnetic card C.

In such a configuration, when the coils 7 and 8 are simultaneously energized, a magnetic attraction force is generated between the yoke and the pressing arm 11 and the pressing arm 11 rotates so as to approach the yoke 1. The magnetic card C can be punched. On the other hand, when the power supply to the coils 7 and 8 is stopped,
Since the punch pin 9 is pulled into the yoke 1 by the return spring 10, it is removed from the magnetic card C.

In this embodiment as described above, the cross-sectional area obtained by adding the coil cross-sectional areas of the coils 7 and 8 is an effective coil cross-sectional area that produces a magnetic attraction force. Since it is arranged in a direction orthogonal to the drilling direction of 9, the height dimension in the vertical direction is small. For this reason, the punch block can be thinned while the coil cross-sectional area is sufficiently secured, and it is possible to reduce the thickness of the card reader attached to which the punch block is attached. Further, in this embodiment, since the pressing arm 11 is provided along the arrangement direction of the coils 7 and 8 and covers the upper side of the coil, magnetic flux loss is small, and a strong magnetic attraction force is exerted particularly in the initial stage of drilling. Can be made.

FIG. 3 is a characteristic diagram of an electromagnetic force generated by energizing the coils 7 and 8. The characteristic curve A is the present embodiment, and the characteristic curve B is the fifth.
The conventional example of a figure is shown. Further, point S is a start point at which the punch pin 9 starts to operate due to electromagnetic force, and range P is a punching area for the magnetic card C. As shown in the figure, the characteristic curve A can generate a large electromagnetic force particularly from the initial area of the punching area, so that a sufficient punching force can be applied to the magnetic card C.

FIG. 4 shows another embodiment of the present invention, in which the same elements as in the above embodiment are designated by the same reference numerals. In this embodiment, a retaining pin 21 is erected from the upper surface of the coil post 4 on the right side. Further, the pressing arm 11 is in a free state without the right end side being pivotally supported, and a pin hole 22 is formed in a portion facing the retaining pin 21, and the retaining pin 21 is inserted into the pin hole 22. is doing. The retaining pin 21 acts so as to prevent the pressing arm 11 from coming off the yoke 1 by the upward movement of the punch pin 9 based on the spring force of the return spring 10.

In such an embodiment as well, by energizing the coils 7 and 8, a magnetic attraction force acts between the coil spots 3 and 4 and the pressing arm 11, so that punching with the punch pin 9 can be performed. Since the pressing arm 11 can be in a free state, the structure is simplified and the assembly is facilitated.

The present invention is not limited to these embodiments and can be modified in various ways.
One or more pieces may be arranged, or they may be arranged concentrically without being arranged side by side. Further, the plurality of coils may be selectively energized without being energized at the same time, whereby the strength of the piercing force can be adjusted.

[Effect of device]

As described above, according to the present invention, since a plurality of coils are arranged in parallel along the direction orthogonal to the displacement direction of the punch pin, the punch block and the punch block can be provided with a simple structure while ensuring a sufficient coil cross-sectional area. There is a remarkable effect that the card reader itself can be made extremely thin. Then, since the pressing arm is located on the rotating end side and the distance between the pressing arm and the pressing arm is close from the initial stage of the rotation operation, the pressing arm starts to rotate and presses the punch pin in the displacement direction. There is a unique effect that an extremely large punching force can be easily applied to the card from the initial stage of the punching operation.

Further, according to the present invention, since the plurality of coil post attracting surfaces are located at a lower position than the end portion that restricts the rotational operation of the pressing arm of the yoke, the attraction due to the magnetization of the pressing arm to the plurality of coil posts is prevented. It is possible to surely prevent it, and there is a special effect that the pressing arm can be extremely smoothly restored when the energization is stopped.

[Brief description of drawings]

1 is a sectional view showing a punch block according to an embodiment of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a characteristic diagram of electromagnetic force, and FIG. 4 is a sectional view showing a punch block of another embodiment. Figure, fifth
The figure is a sectional view showing a conventional punch block. 1 ... Yoke, 7,8 ... Coil, 9 ... Punch pin, 11 ... Pressing arm.

Claims (2)

[Scope of utility model registration request] 1. A yoke having a coil post, a coil wound around the coil post to generate an electromagnetic attraction force based on power supply, and a pressing arm attracted to the yoke based on the generation of the electromagnetic attraction force. A punch block that is displaced by being pressed and biased by a suction operation of the pressing arm, and a spring member that biases the displaced punch pin in a direction to return the displaced punch pin to an original position,
A plurality of the coil posts are arranged side by side along a direction orthogonal to the displacement direction of the punch pin, a coil is wound around each of them, and the pressing arm is rotated at one end extending in the direction in which the coil posts are arranged side by side. A punch block that can be freely disturbed. 2. The attraction surface of the coil post is positioned lower than an end portion where the yoke regulates the rotational movement of the pressing arm to prevent the coil post from being attracted by the magnetization of the pressing arm. The punch block according to claim 1, wherein: