JPH0341329Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a magnetic head conveying device for a magnetic card reader that moves along a magnetic card.

<Prior Art> Conventionally, this type of magnetic head conveying device uses a method in which a rotatable threaded rod is used to reciprocate along a magnetic card in a threaded hole in a magnetic head holder on which a magnetic head is attached, and a magnetic head holder. The magnetic head holder is attached directly to a belt stretched over pulleys provided at both ends of the recording magnetic band of the magnetic card, and the magnetic head holder is moved along the path of the magnetic card by the movement of the belt. A method of running in a straight line is used.

<Problems to be solved by the invention> However, the former method using a threaded rod requires a threaded rod that is slightly longer than the magnetic head recording member, and requires precision in terms of pitch errors in the threaded portion and bending of the threaded rod. Furthermore, the magnetic head holder also requires a screw hole, which results in a large size and high cost in terms of machining accuracy. On the other hand, in the latter method of conveying the magnetic head using a belt, the magnetic head holder is directly attached to the belt, so the belt must be moved in both forward and reverse directions in order to move the magnetic head holder back and forth. The disadvantage is that it is impossible to set the direction of rotation of the belt in one direction, and that the direction of rotation must be controlled.

<Means for solving the problems> In order to eliminate the conventional drawbacks, the present invention
In a magnetic head transport device that moves a magnetic head holder to which a magnetic head that slides along a recording magnetic strip is attached along a magnetic card, a belt is passed around pulleys provided at both ends of the recording magnetic strip. A groove wide enough for the belt to pass through is provided in the center, and a circular groove in which a pin fixed vertically on the outer circumference of the belt slides is provided in the magnetic head holder, which has a groove in the center. We propose a magnetic head transport device for a magnetic card reader.

<Operation> As the belt rotates, the protruding pin fixed to the belt slides in the circular groove when the belt is at the pulley position, changing the direction of movement of the magnetic head holder that has been moving so far. let Therefore, the direction of movement of the magnetic head holder is not fixed depending on the direction of rotation of the belt.

<Embodiment> Next, a magnetic head conveying device for a magnetic card reader according to the present invention will be described with reference to the drawings.

As shown in FIG. 1, a magnetic head mount 2 and a guide hole 3 are attached to the guide rods 4, 4' so that the magnetic head attached thereto is always in close contact parallel to the magnetic card.
The magnetic head holder 1, which is disposed through 3', is connected to pulleys 8, 8' at both ends of the recording magnetic band of the magnetic card.
It is moved back and forth by a belt 5 that is stretched across. In addition to the guide holes 3 and 3' through which the guide rods 4 and 4' pass through the magnetic head holder 1, there are also guide holes 3 and 3' that are inserted into the dotted line circle A in FIG.
As shown in the enlarged partial view of FIG. 2, a pin 6 fixedly protruding from above and below the outer periphery of the belt 5 moves together with the belt 5. Therefore, the magnetic head holder 1 is shown in the partial external perspective view of FIG.
Vertical cross-sectional views at a, b, c, and d in FIG. 3 and e, f, and f in FIG. 3 in FIGS.
As shown in the upper cross-sectional view and the lower cross-sectional view taken at points g and h, a recessed groove 9 having a reciprocating interval between the guide holes 3 and 3' and the belt 5 is provided. In addition, a pulley 8 is located in the center of the groove 9 of the magnetic head holder 1.
A large circular groove 11 in which the belt 5 which can be rotated by the belt 8' rotates, and a small circular groove 10 in which a pin 6 fixed to the belt 5 slides on the inner periphery are formed.

Here, when the belt 5 rotates in the direction of the arrow in FIG. 7, the small circular groove 10 and the large circular groove 11 shown in FIGS. 4 to 6 do not interfere with the rotation with the pin 6 provided on the belt 5. The magnetic head holder 1 having a magnetic head holder 1 is pushed and moved in the moving direction of the belt 5 as shown by the arrow. At the position of the pulley 8, the pin 6 rotates the inner surface of the small circular groove 10 of the magnetic head holder 1 along the inner wall, and the linear portion of the belt 5 again moves the magnetic head holder 1 in the opposite direction. Furthermore, the pin 6 rotates again at the position of the pulley 8', reaches the straight portion of the belt 5, and moves the magnetic head holder 1. Note that even if the moving direction of the belt 5 is reversed, the reciprocating motion of the magnetic head holder 1 can be obtained without any problem.

A belt escape prevention plate 7 is provided in the gap of the belt 5 to prevent the belt 5 from escaping in the opposite direction from the position where the pin 6 is disposed when a load fluctuation occurs on the pin 6 of the belt 5. This belt escape prevention plate 7 reduces the change in the moving speed of the belt 5, and allows the moving speed of the magnetic head holder 1 to be close to a constant speed.

<Effects of the invention> As described above, according to the invention, the movement of the belt 5 is accurately transmitted to the movement of the magnetic head 2 without the need for expensive threaded rods, and the movement of the belt 5 is accurately transmitted to the movement of the magnetic head 2.
To obtain a reliable magnetic head conveying device with a simple mechanism, without damaging the magnetic head conveying device due to erroneous operation regardless of the direction of rotation.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway external perspective view of the magnetic head conveying device according to the present invention, Fig. 2 is an enlarged partial view of the structure within the dotted circle of the magnetic head holder in Fig. 1, and Fig. 3 is the magnetic head holder. 4 is a longitudinal sectional view at a, b, c, and d in FIG. 3, and FIG. 5 is a partial external perspective view of the holding body 1, and FIG.
6 is a lower cross-sectional view at points e, f, g, and h in FIG. 3; FIG. 7 shows the movement of the magnetic head holder with respect to rotation of the belt 5 according to the present invention. FIG. 3 is a plan view of the operation outline. In addition, 1: magnetic head holder, 2: magnetic head mount, 3, 3': guide hole, 4, 4': guide rod, 5: belt, 6: pin, 7: belt escape prevention plate, 8, 8 ': Pulley, 9: Concave groove, 10: Small circular groove, 11: Large circular groove.

Claims (1)

[Scope of utility model registration request] In a magnetic head transporting device that moves a magnetic head holder 1, to which a magnetic head is attached that slides along a recording magnetic strip, along a magnetic card, pulleys 8, 8' provided at both ends of the recording magnetic strip are used.
A circular groove 1 has a concave groove 9 in the center, through which the belt 5 that is stretched over the belt 5 passes, and a circular groove 1 in which a pin 6 fixed and protruding in the vertical direction from the outer periphery of the belt 5 slides along the inner surface.
1 is provided on the magnetic head holder 1 having the groove 9 in the center.