JPS6242362A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To prevent the wear and flaw of a magnetic disk and to suppress the plane run-out of the magnetic disk by using an amorphous carbon material which has high lubricity and is hard to form the surface of a guide plate to contact with the magnetic disk. CONSTITUTION:The entire part of the guide plate 3 is constituted of the amorphous carbon material 7. The guide plate 3, the magnetic disk 1 and a magnetic head 2 are constituted as shown in the figure. Recording and reproduction are executed by rotating the disk 1 at 3,600rpm and pressing the head 2 to the disk 1 while the disk is held attracted to or in press contact with the guide plate 3. The friction between the disk 1 and the plate 3 is decreased by the lubricity of the plate 3, by which the wear and flaw of the magnetic disk are prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a magnetic disk device for recording and reproducing a flexible magnetic disk.

(B) Prior Art Conventionally, this type of magnetic recording and reproducing apparatus has been disclosed in Japanese Patent Application Laid-Open No. 57-115466, for example.
The disk medium is rotated stably at high speed by utilizing the suction effect of the air flow (two) on the guide plate, and in the next state, the disk medium is pressed onto the magnetic head to perform recording and reproduction.

J Fig. 2 (a) A plan view showing the relationship between the magnetic head ^ and the guide grating of a conventional magnetic recording/reproducing device. One surface of 1), that is, the recording surface 1lOC2, is a magnetic head (2) that records and reproduces information on the magnetic disk (1), and the other surface (2 is a guide that rotates the magnetic disk (1)' at high speed and stably) The guide plate (3) has a flat disk support surface 1n (3&) on the side facing the magnetic disk (1);
A disk relief portion (3b) having an arcuate groove and disk introduction surfaces (30) (3C) are formed, respectively. Then, the magnetic head (2) is connected to the magnetic disk (1) (
When pressed twice, the magnetic disk (1) is slightly recessed on the relief portion (6b) side C: and is held in a good contact state.

As shown in FIG. Ramecki method, vaporization method, sputtering method, etc. 6
; as shown in FIG. 4C, a felt (6) is attached.

On the other hand, m-property metals such as Co-Cr and Co-Ni
is polyethylene terephthalate (hereinafter referred to as PET).

), polyamide, polyimide, etc. plastic substrate 1:
Metal thin film magnetic disks formed by vapor deposition or sputtering have been developed.

This metal thin film type magnetic disk has a large residual magnetic flux density and is suitable for high-density recording C2.

However, when the above-mentioned metal thin film type magnetic disk 12 shown in FIGS. 5 and 4 (9 guide gray) is applied, the following problem C occurs. First, if a guide plate as shown in Figure I of aS is used, the pair Hm between the guide plate and the magnetic disk is made of two metals, so the magnetic disk is likely to wear out and be easily scratched. There is a problem. 9. Figure 4C: If you use a guide plate as shown, the magnetic disk described in 8iI has a high rigidity, so if you use a soft material like felt (6), the surface runout of the magnetic disk can be suppressed by enough C2. This makes high-density recording and reproduction difficult. Also, felt (6
) generates lint, which causes foreign matter to adhere to the magnetic disk, causing dropouts, and also poses a problem in the lifespan of the felt under conditions of high-speed sliding, such as in video floppy disk drives.

(c) Problems to be Solved by the Invention The present invention was devised in view of the above-mentioned drawbacks of the conventional example. The object of the present invention is to provide a magnetic recording/reproducing device with a high recording capacity that can suppress the CP.

Ninth way to solve the problem: Full lubrication of the wide surface of the guide plate that faces the magnetic disk Note C;
It is made of a rich and hard amorphous carbon material.

(E) Function As mentioned above, when the surface of the guide route that contacts the magnetic disk is formed of an amorphous carbon material, the friction between the magnetic disk and the guide plate is reduced, which causes wear and scratches on the magnetic disk. In addition, it is possible to suppress the surface runout t of the magnetic disk, and it is possible to perform good recording and reproduction.

Embodiment Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. The arrangement and shape of the magnetic head and guide plate of the magnetic recording/reproducing device of this embodiment are as shown in FIG. 2(a) Φ
), the description in item (b) above is adopted. As shown in Figure 1, section 2, the guide grate (3) for Honjitsu Naginata is made entirely of amorphous carbon material (force). 100" is used. This has a high lubricity f; and is hard.

On the other hand, as a magnetic disk (1), a thin metal film of cco-Cr was deposited on both sides of a plastic substrate made of PET.
A total of 7 lexical metal thin film magnetic disks with an outer diameter of 47 m formed by sputtering C2 were used.

9. Magnetic head (2nd is a ring head made of MnZn ferrite).

the above-mentioned guide play) (3), magnetic disk (1),
The magnetic head (2) is configured as shown in Figure 2 (2).
The magnetic disk m' is rotated at 3600 rpm and the magnetic head (2) Fj is rotated with the guide play (3) i=attraction or king.
When the magnetic disk (1) and the guide plate (3) are pressed against the magnetic disk (1) and the guide plate (3 ) ≦: 1 is hardly generated, and the reproduced output signal hardly changes.

In the magnetic recording/reproducing device as described above, the guide plate (
3) Since the entire body is made of amorphous carbon material (71), the M of the magnetic disk (1) and guide grating (3)
Friction is reduced by the lubricity of the guide plate (3),
Since it prevents the occurrence of wear and scratches on the magnetic disk,
Even when used for a long time, the playback output signal hardly changes, and since the guide plate (3) is hard, it suppresses the vibration of the magnetic disk (1), resulting in stable and high-density playback output. can be easily obtained.

In addition, the present invention I: Guide plate according to the present invention? When metal-coated disk media are applied, it is easier to obtain a high-density reproduction output signal than when using a conventional guide play, and the durability of the disk medium is improved. has also improved.

The present invention is preferably applied to a magnetic recording/reproducing device C2 such as a so-called floppy disk device or a video floppy device. However, it goes without saying that the same applies to recording or reproduction-only devices, such as so-called electronic cameras and their reproduction devices.

(G) Effects of the Invention According to the present invention, the lubricity C of the amorphous carbon material forming the contact surface of the guide plate with the magnetic disk improves the T sag between the magnetic disk and the guide plate. The durability of the magnetic disk and the guide plate is significantly improved, and the hard characteristic C2 of the amorphous carbon material prevents surface runout of the magnetic disk, resulting in a high-density reproduction output signal. We provide all excellent magnetic recording and reproducing devices that can stably obtain C.

[Brief explanation of the drawing]

Figure 1 is a side sectional view of the guide plate of the present invention, Figure 2 (
FIG. 3A is a plan view showing the relationship between the magnetic head and the guide plate, and FIG. 6 and 4 are roughly sectional side views of a conventional guide plate.

Claims (1)

[Claims] A magnetic disk device comprising a magnetic head disposed on one surface of a magnetic disk and a guide plate disposed on the other surface of the disk, the surface of the guide plate facing the disk. A magnetic disk device characterized in that it is made of an amorphous carbon material that is highly lubricating and hard.