JPS5810788B2 - Jikihetsudo Osaekikou - Google Patents

Description

[Detailed description of the invention] The present invention relates to a magnetic head holding mechanism.

A conventional magnetic head holding mechanism is configured so that the magnetic head can move in parallel in a direction perpendicular to the paper surface of the medium in order to accommodate changes in the thickness of the medium.

In this case, not only does the magnetic head require a guide mechanism to enable parallel movement as described above, but there is also the disadvantage that the head does not accurately follow the thickness of the medium due to friction between the guide mechanism and the magnetic head. .

This drawback can be solved by making the magnetic head rotatable around a predetermined axis depending on the thickness of the medium. The disadvantage is that it stops pressing with a pressure of .

The present invention eliminates the above drawbacks and provides a magnetic head holding mechanism in which the medium always comes into close contact with the magnetic head with a predetermined pressing force regardless of the thickness of the medium.

The magnetic head holding mechanism according to the present invention will be explained below with reference to the drawings.

FIG. 1 is a perspective view showing a main part of a medium feeding mechanism to which a magnetic head holding mechanism according to the present invention is applied.

In FIG. 1, 1 is, for example, a bank passbook (hereinafter collectively referred to as the medium), and as shown in a perspective view in FIG.
It has a magnetic storage section 2 called a magnetic stripe on one side, and this magnetic storage section 2 is written and read by a magnetic head, which will be described later.

Such a medium 1 is transported along a running path 3 indicated by a dotted line in FIG.
is run by drive rollers 4, 40 along.

The drive rollers 4 and 40 are feed rollers 4a and 40a, respectively.
and pinch rollers 4b, 40b, and the feed rollers 4a, 40a and the pinch rollers 4b, 40b are
are arranged so as to face each other via the

Reference numeral 5 denotes a magnetic head, and a lever 1 in the shape of an abbreviation is arranged along the travel path 3 of the medium 1 and rotates around a support shaft 6.
It is fixed at the tip of 3.

Therefore, the magnetic head 5 is rotatable about the support shaft 6.

On the other hand, reference numeral 7 denotes a holding member, which is arranged so as to face the magnetic head 5 via the running path 3, as shown in FIG.

The block 8 constituting the holding member 7 is rotatable about a fixed shaft 9 in a plane perpendicular to the shaft 9, and can follow the rotation of the magnetic head 5.

A first roller 10 and a second roller 11 made of a rubber material, for example, are fixed to this block 8.

As shown in FIG. 2, the first roller 10 faces the reading section 5R of the magnetic head 5, and the second roller 11 faces the writing section 5W.
Fixed.

A spring 12 elastically presses the magnetic head 5 against the pressing member 7 via the lever 13.

Reference numeral 14 designates a leaf spring, the tip of which is branched to form a first tip 14a and a second tip 14b.

These two tips 14a and 14b act on the block 8 in mutually symmetrical positions about the axis 9.

The pressing force of the leaf spring 14 against the presser member 7 is designed to be smaller than the tension of the spring 12.

Next, the operation of the magnetic head holding mechanism according to the present invention will be explained.

First, when the medium 1 begins to descend by a drive mechanism (not shown), the lever 13 is rotated in the direction of arrow a, the magnetic head 5 is rotated, and the two rollers 10, 1 of the magnetic head and the presser member 7 are rotated.
A gap is formed between the two.

When the lower end of the medium 1 begins to be moved by the drive roller 4° 40, the lever 13 rotates in the direction of the arrow, and the spring 1
The medium 1 is pressed against the magnetic head 5 with a pressing force determined by the tension of the magnetic head 2.

Furthermore, the medium 1 is moved along the running path 3 by drive rollers 4 and 40, and the magnetic head 5 reads and writes to the magnetic storage section 2 provided on the medium 1.

Next, the operation when the thickness of the medium 1 changes will be explained.

When the thickness of the medium 1 increases, the pressing member 7 is supported by the fixed shaft 9 and cannot be moved in parallel, but the magnetic head 5 is rotatable about the supporting shaft 6. is displaced by the thickness of medium 1.

This displacement appears as a rotational movement about the support shaft 6 against the tension of the spring 12.

As the magnetic head 5 rotates, the holding member 7 also rotates about the fixed shaft to follow the rotation.

Therefore, since the block 8 also rotates in the direction of arrow C, the roller 10 provided on the block 8 presses the medium 1 against the reading section 5R of the magnetic head 5, and one roller 11 presses the medium 1 against the writing section 5R.
A medium 1 is pressed against W, and reading and writing are always performed in good condition regardless of the thickness of the medium 1.

In the above embodiments, the case where the thickness of the medium 1 changes from thin to thick is explained, but it goes without saying that the same effect can be achieved when the thickness of the medium 1 decreases.

As explained above, according to the present invention, since both rollers are rotatably provided in one block, the configuration becomes simple.

In addition, the center of rotation of the block is set at a point at the same distance from both rollers, and the suppression mechanism applies rotational moments in different directions with respect to the point, so that adhesion against changes in the thickness of the medium is improved. Even when the head is separated from the presser mechanism, the positions of the block, that is, both rollers, remain constant.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the main parts of a medium feeding mechanism to which the magnetic head holding mechanism according to the present invention is applied, FIG. 2 is a perspective view of the medium, and FIG. 3 is a side view showing the arrangement relationship between the magnetic head and the holding member. It is. In the figure, 1 is a medium, 2 is a magnetic storage unit, 3 is a running path, 5 is a magnetic head, 7 is a holding member, 8 is a block, and 10
, 11 are rollers, 5R is a reading section, and 5W is a writing section.

Claims (1)

[Claims] 1. A holding member disposed along a medium running path, and a holding member arranged to face the holding member across the running path and rotatable about a predetermined central axis, and the holding member The magnetic head includes a writing section and a reading section that are provided apart from each other in the traveling direction of the medium, and the holding member includes a first section facing the reading section of the magnetic head. In a magnetic head holding mechanism including a roller and a second roller facing the writing section, the first and second rollers are rotatably provided in only one block, and the block is separated from both rollers. It is possible to swing around a point at an equal distance,
A magnetic head holding mechanism, wherein the holding mechanism receives rotational moments in mutually different directions with respect to the center point by the suppressing mechanism.