JPS6343637Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a holding and moving device for a magnetic head used in a device for reading or writing the stored contents of a magnetic medium provided in a magnetic card reader, a bank passbook, or the like.

In order to write or read information to or from a magnetic medium, it is necessary to move the magnetic head while pressing it against the magnetic medium. Conventionally, as shown in FIG. 1, when a moving block 21 to which a magnetic head 20 is attached is to be moved by rotating a shaft 22 provided with a feed screw, the moving block 21 is moved without rotating. In order to do this, another guide shaft 23 is used. Then, the card 10 is pressed from the back side of the card 10 using a pressing roller (not shown) or the like so that the magnetic head 20 of the magnetic medium 11 of the card 10 is pressed. However, when two shafts 22 and 23 are used in this way,
Considerable precision in parallelism and dimensions is required, which increases costs, complicates assembly, and makes it difficult to downsize. Further, although the magnetic head 20 only needs to be pressed against the magnetic medium 11 when writing or reading, that is, when moving in one direction, the magnetic head 20 also presses against the magnetic medium 11 when returning, that is, when moving in one direction.
The problem is that the magnetic head 20 is constantly pressed during the reciprocating movement of the card 10, which shortens the life of the card 10 due to wear, and the troublesome work of adjusting the gap between the magnetic head 20 and the pressing roller is required. There was a problem.

In view of the above, an object of the present invention is to provide a magnetic head holding and moving device that has a simple structure, is easy to assemble, is compact, inexpensive, and has a long service life.

That is, in the magnetic head holding and moving device according to the present invention, the magnetic head is attached via an elastic body to a moving block that moves when a shaft provided with a feed screw rotates, and when the shaft rotates in one direction, the magnetic head is moved. The magnetic head is pressed against the magnetic medium by a rotational moment, and by moving the moving block in this state, the magnetic head is moved in one direction while being pressed against the magnetic medium, and the shaft When the shaft rotates in one direction and the magnetic head moves in one direction, the magnetic head is pressed against the magnetic medium, and when the shaft rotates in the opposite direction and the magnetic head returns in the opposite direction, the rotational moment of the shaft is in the opposite direction. Since the magnetic head is not pressed against the magnetic medium, wear is halved and the service life can be extended.
Further, since a guide shaft is not required, the structure becomes simple and assembly is easy, and miniaturization and cost reduction are possible. Furthermore, the troublesome gap adjustment between the magnetic head and the pressure roller is no longer necessary.
Moreover, since the magnetic head is attached to the moving block via an elastic body and the pressing force is applied by the rotational moment of the shaft, the pressing force does not change even when the magnetic medium is deformed, ensuring reliable writing and writing. Reading can be performed.

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 2, the magnetic head 3
0 is attached to the moving block 31 via a leaf spring 34. A shaft 32 provided with a spiral feed screw (which may be a groove or a protrusion) passes through the moving block 31.
It is screwed into a female screw (not shown) inside. When the shaft 32 is rotated while preventing the rotation of the moving block 31, the moving block 31 moves left and right along the shaft 32 depending on the direction of rotation of the shaft 32.

Now, assume that the direction in which information is written to and read from the magnetic medium 11 of the card 10 is the direction in which the magnetic head 30 moves from left to right in the direction of arrow A. When the shaft 32 is rotated counterclockwise as shown by arrow B in FIG.
is pressed against the magnetic medium 11 as shown by arrow C,
By thus preventing the rotation of the moving block 31, the moving block 31 and the magnetic head 30 are prevented from rotating.
moves as shown by arrow A. In this way, the rotation moment of the moving block 31 by the shaft 32 is applied to the magnetic head 30 via the leaf spring 34, and the magnetic head 30 transfers the card 10 to the magnetic medium 11.
Even if there is a deformation, etc., it is always pressed with a constant pressing force, and information can be written and read reliably.

When shaft 32 is rotated in the direction opposite to arrow B, an opposite rotational moment is applied to magnetic head 30, causing magnetic head 30 to separate from magnetic medium 11. At this time, the tip 34a of the leaf spring 34 comes into contact with the presser plate 35 to prevent rotation of the moving block 31, and the tip 34a of the leaf spring 34 slides in contact with the presser plate 35 in the direction opposite to arrow A. The magnetic head 30 and moving block 31 move. Therefore, when moving in this direction, the problem of wear between the magnetic head 30 and the magnetic medium 11 does not occur, and the service life can be extended.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional example, and FIG. 2 is a perspective view of an embodiment of the present invention. 10...Card, 11...Magnetic medium, 20,3
0... Magnetic head, 21, 31... Moving block, 22, 23, 32... Shaft, 34... Leaf spring, 35... Holding plate.

Claims (1)

[Scope of utility model registration request] A magnetic head is attached via an elastic body to a moving block that moves when a shaft provided with a feed screw rotates, and when the shaft rotates in one direction, the magnetic head is pressed against the magnetic medium by the rotational moment. . A holding and moving device for a magnetic head, wherein the magnetic head is moved in one direction while being pressed by a magnetic medium by moving the moving block in this state.