JPS593742A - Magnetic head - Google Patents

Abstract

PURPOSE:To reduce the coefft. of friction of the sliding body of a magnetic head and to prevent the damage of materials, by forming the sliding body which moves in contact with a magnetic recording medium or slides in a floated state with an org. material or an org. material contg. an inorg. material. CONSTITUTION:The sliding body 10-1 or 10-2 of a magnetic head which moves in contact with a magnetic recording medium or slides in a floated state is formed with an org. material or an org. material contg. an inorg. material. In case of the former org. material, a cast ABS resin block or an acetal resin block is cut and polished. In case of the latter org. material, a cured block of epoxy resin powder contg. 30% MoS2 or a cured block of phenolic resin contg. 20% fluorocarbon is cut and polished. Thus, the coefft. of friction is reduced, and the damage of the medium and head is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field of the Invention The present invention relates to a magnetic head used in a magnetic disk drive, and more particularly to a magnetic head that is levitated or slid by a driven medium and performs recording or reproduction.

(b) Prior Art and Problems For example, in a magnetic disk drive, a disk-shaped medium is inserted into a spindle, and the spindle is driven to rotate.

On the other hand, the head portion to which the TB magnetic head is fixed is moved via a gimbal, and a predetermined track is selected by the floating or sliding magnetic head tree to perform recording or reproduction.

Such a magnetic head is constructed as shown in FIG.

FIGS. 1A and 1B are perspective views of a conventional magnetic head.

(a) shows a sliding body 1-1 made of a hard inorganic material such as alumina or barium titanate, with ferrite,
Core 2-1 made of magnetic material such as permalloy
The core 2-1 is provided with a gap 3 and a coil 4 to form a magnetic circuit. Φ) is wound around the core 2-2 with a gap 3 on the side of the sliding body 1-2 formed of a ferromagnetic material such as Mn-Zn ferrite or NH-z ferrite. This is a monolithic type in which a magnetic circuit is formed by a coil 4 that is attached to the magnetic field.

By using such a magnetic head, consideration has been given to making the flying height of the magnetic head as small as possible due to the rotation of the medium so as to achieve high density recording and reproduction of the medium to be recorded and reproduced. Therefore, the sliding body 1-1.1 facing the medium
The slider surface LA of -2 is generally further worn and damaged by polishing etc. in order to obtain a level of flatness l)J
,I Emphasis is placed on human resources, and materials that are hard and lightweight are used.

On the other hand, recently, in order to stably lower the flying height of the magnetic head, when the magnetic head is stopped, the magnetic head and the medium are brought into contact, and the magnetic head slides as the medium rotates. A so-called contact start/stop (hereinafter referred to as C8S) system in which the head flies has come to be used. In such a case, the medium is slid by the sliding body 1-1.1-2, so the special KjJ! Care must be taken to prevent wear or damage and to prevent intrusion.

Therefore, conventionally, a lubricant has been applied to the surface of the medium. However, as mentioned above, sliding body 1-1.1
Since the medium 1-2 is made of a hard material, the medium 1-1.1-2 itself may be damaged due to the posture, vibration, deformation, etc. of the hunting head.

Similarly, in floppy disk drives, the medium cone and the sliding body are constantly in contact with each other as they slide, making them even more susceptible to damage, which has been a major problem.

(e) Purpose of the Invention The purpose of the present invention is to eliminate the aforementioned point by forming a sliding body using an abrasive material that has mechanical strength, lubricity, low friction, and workability. It is something that provides something.

(d) This is achieved by a magnetic head characterized by being formed of a member having the structure of the invention.

(e) Examples of the invention The present invention will be explained in detail below with reference to FIG.

FIG. 2(a) Φ) is a perspective view of the magnetic head according to the present invention.

The sliding body 10-1.10-2 is formed of an organic material that is flexible and has lubricity and low friction properties when sliding with a medium, or a member that contains an inorganic compound in an organic material. However, as for (b), the magnetic material is exposed on the slider surface 10A as shown in 10-B, and the others are as shown in (a) in Fig. 1.
It has the same configuration as Xb).

Examples using organic materials will be described below.

[Example 1] Slide bodies 10-1 and 10-2 are manufactured by cutting and polishing an AB8 resin block formed by casting.

[Example 2] Slide bodies 10-1 and 10-2 are manufactured by cutting and polishing blocks made of acetal resin.

[Example 3] A sliding body 10-110-2 is manufactured by processing ABS resin by a melt die-casting method.

Examples in which the organic material contains an inorganic compound will be described below.

[Example 4] A block is formed by curing epoxy resin powder containing 30% molybdenum disulfide, and this block is cut and polished to produce sliding bodies 1°-1 and 10-2.

[Example 5] A phenolic resin containing fluorocarbon 20c4 is cured to form a block, and this block is cut and polished to produce sliding bodies 10-1 and 10-2.

[Example 6] An epoxy resin containing 45% alumina is cured to form a block, and this block is cut and polished to produce sliding bodies 10-1 and 10-2.

As described above, the sliding body 10 made according to Examples 1 to 6
-1.10-2 and the conventional sliding body 1-1゜1-2 are slid on a medium by applying a predetermined pressure, and the friction forces are compared as shown in Table 1. As shown in the table, it is clear that the frictional force is lower than before. (In the table, - marks have not been measured.) Therefore,
As organic materials, thermosetting resins such as phenol resins, melamine resins, and epoxy resins, and thermoplastic resins such as styrene resins, fluororesins, polyimide resins, polycarbonate resins, acetal resins, and boriamide resins are used to form the sliding body 10-1. 10-2.

The lubricity can be improved by forming sliding bodies 10-1 and 10-2 by incorporating inorganic inclusions such as tungsten carbon dioxide and fatty acid esters. Further, in order to obtain a certain degree of hardness, it is also possible to contain inorganic compounds such as barium alumina titanate, silicon oxide, and fine metal particles, and the same effect can be obtained.

Cf) As described in detail, in the present invention, the sliding bodies 10-1 and 10-2 are formed of a member containing an organic material or an inorganic compound.

In the past, the slider surfaces IA and IOA collided with the medium when vibrating, especially when starting and stopping, causing scratches, but in the present invention, as described above, due to the low friction, the vibrations during connection sliding can be avoided. Even if vibration occurs, it is still flexible, so it is buffered and prevents scratches.

A comparison was made between the C8S method of starting and stopping the present invention and the conventional method, and in the conventional method, scratches occur after 20,000 to 30,000 times even when lubricant is applied to the medium. However, in the case of the present invention, even when no lubricant was applied to the medium, no scratches occurred even after 50,000 cycles.

As mentioned above, the flexibility and friction coefficient can be reduced, durability can be improved, etc. The KC8S method has the advantage of not requiring the application of lubricant, and the practical effects are excellent.

Incidentally, in the present invention, a magnetic disk device will be described, but the embodiment 9 can also be applied to a magnetic tape device, etc., and the same effect can be obtained.

[Brief explanation of drawings]

1A and 1B are perspective views of a conventional magnetic head, and FIGS. 2A and 2B are perspective views of a magnetic head according to the present invention. In the figure, 1-1.1-2.10-1゜10-2 is a sliding body, 2-1.2-2 is a core, 3 is a gap, 4 is a coil, IA, IOA are sliders (0-) (Shin

Claims (1)

[Claims] A sliding body that slides or floats on a recording surface of a medium, a magnetic body provided on the sliding body, and a coil on the magnetic body,
A magnetic head that performs recording or reproduction on the medium via the magnetic material, wherein the sliding member is formed of an organic material or a member in which the organic material contains an inorganic compound.