JPS6117268A - Magnetic head device - Google Patents

Abstract

PURPOSE:To obtain a stable reproducing signal by using a rotating body as a holder of a recording medium. CONSTITUTION:A holder 1 is positioned on a recording and reproducing gap of a magnetic head 2 and constituted so as to rotate in the direction along the scanning direction of a recording medium 3. As for a position of the rotating direction, when the recording medium is shaped like a disk, for instance, a floppy disk, it will do that it is constituted so as to become vertical to the radial direction. When the magnetic head is moved to the inside periphery or the outside periphery, the rotation of the recording medium can be approximated to a straight line when it has been seen from the holder, therefore, a special contrivance for the holder is not required. As for the material quality of the holder 1, when that of the material quality having elasticity, for instance, hard rubber or felt is used for the contact surface to the recording medium 3, the contact state of the magnetic head 2 and the recording medium 3 is better. In this way, since a frictional resistance of the holder is not generated, the recording medium is held by a sufficient force without exerting a bad influence such as an uneven rotation, etc., a high density recording can be executed, and a stable reproducing signal is obtained.

Description

[Detailed description of the invention] 〔Technical field〕 The present invention relates to the structure of a magnetic head device.

[Prior art]

Conventionally, a presser foot for bringing a magnetic head into contact with a recording medium has been configured to have a rectangular or cylindrical shape, with the planar shape facing the contact portion with the recording medium.

When recording and reproducing, a pressure of several 1 to several 101 was applied to the presser foot to bring the magnetic head and the recording medium into contact, but in this type of system, a pressure of 0.1 to 0 .A gap (spacing loss) of about 2 microns will occur.

Spacing loss is not a problem at low recording densities, but at high recording densities, for example, if the recording wavelength becomes 1 micron,
The spacing loss will be approximately doubled, and the reproduction output will be halved.

In addition, in order to minimize spacing loss,
If the pressure applied to the presser foot is increased, the frictional resistance with the recording medium will increase, making the rotation of the recording medium unstable (the wow will increase, making it impossible to obtain a stable playback signal, and shortening the life of the recording medium). There was a problem that the image became dark.

〔the purpose〕

The present invention is intended to solve these problems, and its objectives are to eliminate spacing loss between the magnetic head and the recording medium, and to reduce the frictional resistance between the magnetic head and the recording medium. By doing so, it is possible to obtain a large and stable reproduction signal, extend the life of the recording medium, and provide a reliable and durable device.

〔overview〕

The magnetic head device of the present invention sandwiches a recording medium and magnetically
In a device in which a magnetic head and a recording medium are brought into contact by applying pressure to a presser section provided opposite to a rad, the recording medium contacting section of the presser section rotates in a direction along the running direction of the recording medium. Characterized by being a body.

〔Example〕

The present invention will be described in detail below based on examples.

FIG. 1 is a side view showing an embodiment of the present invention as viewed from the recording medium running direction, and FIG. 2 is a principle diagram showing the relationship between the magnetic head, the recording medium, and the presser as viewed from a direction perpendicular to the recording medium running direction. be.

In FIG. 1, 1 is a presser foot that brings the recording medium into contact with the magnetic head, 2 is the magnetic head, 3 is the recording medium, 4 is a shaft that supports the presser foot 1, 5 is an upper carriage that fixes the shaft 4;
6 is a spring that applies pressure to the presser foot 1 through the upper carriage 5; 7 is a spring presser; 8 is the magnetic head 1 and the upper carriage;
The lower carriage receiving the spring holder, 9, is a screw that fixes the upper carriage and the spring holder to the lower carriage.

As shown in FIGS. 1 and 2, the presser foot 1 is positioned above the recording/reproducing gap of the magnetic head 2 and is configured to rotate in a direction along the running direction of the recording medium 6. If the recording medium is disk-shaped, for example, a floppy disk, the position in the rotational direction may be configured to be perpendicular to the radial direction.

When the magnetic head is moved from the inner periphery to the outer periphery, the rotation of the recording medium can be approximated to a straight line when viewed from the presser, so no special measures are required for the presser.

The presser foot 1 may be made of a single material or a combination of non-magnetic stainless steel 9 plastic, hard rubber, felt, etc., but the surface in contact with the recording medium 5 may be made of an elastic material,
For example, the contact between the magnetic head 2 and the recording medium 3 is better when hard rubber or felt is used.

The presser foot can be attached to the carriage in two ways: as shown in Figure 1, the m4 is fixed to the upper carriage, and as shown in Figure 3, the shaft 4 can be moved freely in a direction perpendicular to the running direction of the recording medium.・There is a structure in which it is fixed to the upper carriage via a flexible IJ gimbal. Although both of the side structures described above have sufficient effects, the structure fixed to the upper carriage 5 via a flexible gimbal 10 as shown in Fig. 3 is better because it can absorb mounting errors and warping and distortion of the recording medium, and can always be used. This is desirable because it can be held flat against the magnetic head.

In this embodiment, the magnetic head has a spherical shape, but even a flat shape can have sufficient effects.

〔effect〕

As described above, according to the present invention, by using a rotating body as the presser foot for the recording medium, it is possible to press only the recording/reproducing gap portion of the magnetic head, and it is possible to press the recording medium by applying large pressure to the presser foot. Since there is no frictional resistance between the recording medium and the presser foot, the recording medium can be held down with sufficient force without adverse effects such as uneven rotation, and even with high-density recording, there is no spacing loss and a large playback signal can be obtained. This enables high-density recording. Furthermore, since there is no frictional resistance between the recording medium and the presser foot, there is no damage to the recording medium, and reliability and durability are improved.As a result, uneven rotation of the recording medium is eliminated, and a stable reproduction signal can be obtained. has.

[Brief explanation of the drawing]

FIG. 1 is a side view showing one embodiment of the present invention, and FIG. 2 is a side view showing one embodiment of the present invention.
FIG. 3, which is a diagram showing the principle of the present invention, is a perspective view showing the attachment of the presser foot. 1... Presser foot 2... Magnetic head 5... Recording medium 4... Axis 5... Upper carriage 6...・Spring 7...Spring retainer 8...Lower carriage 9...Screw 10...Gimbal or higher

Claims (1)

[Claims] In a device in which the magnetic head and the recording medium come into contact by sandwiching the recording medium and applying pressure to a presser section provided facing the magnetic head, the recording medium contacting section of the presser section is moved in the recording medium running direction. A magnetic head device characterized in that it is a rotating body that rotates in a direction along the axis.