JPS6374114A - Magnetic head structure - Google Patents

Abstract

PURPOSE:To reduce wear of a magnetic film and to prolong the lifetime of a magnetic head structure by using a flexible material excelling in lubricity to form a part of the medium rubbing surface of a slider. CONSTITUTION:An erasion core 4 is set at the side part of a read/write core 2 via an erasion gap 9 and forms a straddle type head. This magnetic head structure has the reduced rubbing frequency between a magnetic recording medium and a hard slider 1 since the felt is used to form a part of a medium rubbing surface consisting of two parts via an air vent groove 8. Then wear and exfoliation of a magnetic film are reduced and therefore the lifetime of the head structure is prolonged. The felt 5 uses preferably fibers like the ox fur, the jute, etc., which are compressed into about 0.10-0.19g/cm<3> density. Then the felt 5 is attached to the slider 1 via an adhesive of epoxy, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This paper relates to a magnetic head structure in which a magnetic head and a slider are integrally formed.

[Prior art]

For example, in a magnetic recording medium drive such as a floppy disk drive, t! A magnetic recording medium is sandwiched between two magnetic head structures.

There are known devices in which information is recorded and reproduced via this magnetic recording medium.

Figure 4 shows a conventionally known magnetic disk drive of this type.
! 21 is a front view of the main parts of the llJ device, 21 is a chassis, 22 is a guide bar installed in parallel with each other on this chassis 21, and 23 is a head carriage slidably attached to this guide bar 22. , 24 is t3N! to this herad carriage 23! lower magnetic \rad structure, 2
A rotating arm 27 5 is rotatably attached to one end of the head carriage 23 via a spring member 26 and biased in a direction to come into pressure contact with the lower magnetic head structure 24;
is the lower magnetic head structure 24 of this rotating arm 25.
The lower magnetic head structure 24, which is an upper magnetic head fIt structure mounted in a position facing the upper magnetic head fIt structure, is attached to the Herad carriage 23 via a gimbal spring 28, and 27 is attached to the rotating arm 25 via a gimbal spring 29. These lower magnetic head structure 24 and upper magnetic head structure 27 are formed by integrally coupling a magnetic head 30 and a slider 31, as shown in FIG.

32 connects the herad carriage 23 to the guide bar 22.
along? A stepping motor that moves.

Reference numeral 33 denotes a power transmission mechanism for transmitting the driving force of the stepping motor 32 to the head carriage 23, and 34 is arranged on an extension of the transfer path of the lower magnetic head structure 24 and the upper magnetic head structure 27. disc drive motortie
35 is a turntable attached to the tip of the rotating shaft 34a of the disk drive motor 34; 36 is the turntable 3;
A magnetic recording medium attached to the S is shown.

The conventional disk drive device described above has a turntable 3.
Before the magnetic recording medium 36 was attached to 5, the guard
As shown by the two-dot chain line in FIG.
The front portion of the front portion is bent forward from the rad carriage 23 against the elasticity of the spring member 2G. When the magnetic recording medium 36 is mounted on the turntable 35, the rotating arm support device (not shown) is removed in conjunction with the operation, and the tip of the rotating arm 25 is moved around the head by the elasticity of the spring member 26. It is rotated toward the ridge 23 side. As a result, the lower magnetic head structure 24 and the upper magnetic head structure 27 are brought into contact with both the front and back surfaces of the magnetic recording medium 36. In this state, a control device (not shown) is installed to control the stepping motor 32.
When the disk drive motor 34 is driven, the magnetic head 30 is transferred to a desired track, and the magnetic recording medium 36 slides on the medium sliding surfaces of the lower magnetic head structure 24 and the upper magnetic head structure 27. , recording information.

Can be played.

[Problem that the invention seeks to solve]

By the way, the slider 31 provided in the lower magnetic head structure 24 and the upper magnetic head structure 27 is made of, for example, barium titanate ceramic.

Since the magnetic recording medium 36 is made of a hard material such as calcium titanate ceramics or forsterite ceramics, the magnetic recording medium 36 is easily worn out by the slider 31, resulting in a problem that the useful life of the magnetic recording medium 36 is short.

Also, due to the friction with the slider 31, magnetic iil! When abrasion particles are generated on the recording medium 36 or dust in the air adheres to the magnetic recording medium 36, these abrasion particles are likely to be rubbed against the magnetic recording medium by the hard slider 31. There is a problem that the useful life of the recording medium 31 is short.

Further, when the magnetic recording medium 31 is a magnetic disk housed in a hard case, the following problems occur due to vibration of the magnetic disk during one rotation. That is, since magnetic disks are punched and formed from a long tape-like raw sheet that is wound around a roller, they are usually warped. In addition, unlike magnetic disks housed in soft jackets, magnetic disks housed in a hard case cannot regulate the height of the magnetic disk relative to the magnetic head structure 24, 27 during one revolution, so the disk cartridge It is possible to behave freely within the body to a certain extent. Therefore, when mounted on the turntable 35 and driven to rotate, the magnetic disk vibrates vertically (
(plane deflection) and exerts a force that causes the rotating arm 25 to spring up against the elasticity of the spring member 26.

A spring member 26 is stretched between the head carriage 23 and the rotating arm 25, and this irregular surface runout can be suppressed to some extent. but.

The elasticity of the spring member is normally set to about several tens of grams, taking into account the wear and tear of the magnetic head 30, slider 31, and magnetic disk.If the irregular surface runout is large, the elasticity of the magnetic disk will cause the spring member to rotate. A phenomenon occurs in which the arm 25 is flipped upward against the elasticity of the spring member 26.

When such a flip-up phenomenon occurs, the magnetic head structure 2
If the medium sliding surfaces 4 and 27 are rigid, they will not be able to absorb the force of flipping up the magnetic disk, so as shown in FIG.
As a result, the magnetic disk 37 is separated from the gap portion 30a of the magnetic head 30.

This causes a problem that normal information recording and reproduction cannot be performed.

[Means for solving problems]

The present invention can solve the problems of the prior art described above and extend the service life of magnetic recording media.

In order to provide a magnetic head structure capable of recording and reproducing with a high S/N ratio, in a magnetic head structure in which a magnetic head and a slider are integrally formed, the media latent surface of the slider is It is characterized in that a part of it is made of a flexible material with excellent lubricity, such as felt or nonwoven fabric.

[Effect]

If the media sliding surface of the slider is made of a flexible material with excellent lubricity, such as felt or nonwoven fabric, wear on the magnetic recording medium due to slider sliding can be alleviated, and the service life of the magnetic recording medium can be improved. can.

Furthermore, even if large particles of dust in the air adhere to the surface of the magnetic disk, the soft material cleans it, so that the service life of the magnetic recording medium can be extended in this respect as well. Furthermore, even if the magnetic recording medium vibrates, the force is absorbed by the flexible material and no upward force is applied to the magnetic head structure. Therefore, the media sliding surface of the magnetic head structure is prevented from separating. Therefore, the magnetic recording medium is always in sliding contact with the gap portion of the magnetic head, and recording and reproduction with a good S/N ratio can be performed.

〔Example〕

FIG. 1 shows a magnetic head structure 11111 according to the present invention.
Rumor has it that it's 11 and 1 is ``r-''.

;S+,-F,U<p-7,3 indicates a leat, U, a cap, 4 indicates an erase core, and 5 indicates a felt.

The slider 1 is made of non-magnetic and highly slippery ceramics such as barium titanate ceramics, calcium titanate ceramics, forsterite ceramics, and zirconia ceramics. Setting portions 6 of the read/write core 2 and erase core 4 are formed to protrude. The upper surface 6a of this setting section 6 constitutes a part of the medium sliding surface, and the medium sliding surface 2a of the read/write core 2
and the medium sliding surface 4a of the erase core 4.

It is arranged on the same plane as this upper surface (medium sliding surface) 6a. Furthermore, curved chamfers 7.degree. 7a are provided at the end on the medium inflow side and the end on the medium outflow side of the setting portion 6, so that the medium can flow in and out smoothly.

The felt 5 is made of natural fiber or a composite of 52 it m]
E: 771 j and Mi≧tsu, -tsu611 1=
7J
:tsu , -:ko ・2t7A1-12 setting m (σ4 tears [t bar straddle treasure, 0. weaning W distance, slider 1 above)
is stretched along the side facing the setting portion 6. The felt 5 has a thickness substantially equal to the height H of the setting section 6, and the upper surface 5a of the felt 1-5 constitutes a part of the medium sliding surface. Also.

The groove 8 formed between the setting part 6 and the felt 6 is
It functions as an air vent to improve the adhesion of the magnetic disk to the medium sliding surfaces 5a, 6a. Note that the felt 5 can be made of any material and density depending on the usage conditions, but when considering the service life and flexibility, fibers such as downy wool and jute can be used with a density of 0.10 to 0.10. 0
．． This felt 5, which is preferably compression molded to a density of about 19 g/aJ, is stretched over a desired portion of the slider 1 using an adhesive such as epoxy.

The erase core 4 is set with a predetermined erase gap 9 interposed between it and the side portion of the read/write core 2, and constitutes a so-called straddle type head.

In the magnetic head structure of the first embodiment, a part of the medium sliding surface consisting of two parts is formed of felt through the air vent m8, so that the entire magnetic recording medium slides on the hard slider 1. This reduces the frequency with which the magnetic film is worn out and peels off, and the service life can be extended. In addition, since chamfers 7 and 7a are applied to the medium inflow side end and the medium outflow side end of the setting portion 6 constituting the other medium sliding surface, as shown in FIG. The vibrations are absorbed by the felt 5, and the medium sliding surfaces 5a and 6a of the magnetic head structure are not separated from the magnetic recording medium 1o.
Furthermore, since dust in the air adhering to the surface of the magnetic recording medium is attracted to the felt 5, the dust is not rubbed against the magnetic disk by a hard slider as in the conventional case. The service life of the magnetic recording medium can be extended.

Next, a second embodiment of the present invention will be explained based on FIG. It is characterized by being covered with a flexible material with excellent lubricity, such as

FIG. 3 is a perspective view showing a second embodiment of the magnetic head structure according to the present invention, and 11 is a slider.

Reference numerals 12 and 13 indicate felt, and other members similar to those shown in FIG. 1 are designated by the same reference numerals.

The slider 11 has a setting section 6 for the read/write core 2 and erase core 4 protrudingly formed along the approximate center of one side, and a notch formed on the magnetic disk inflow side of the setting section 6. 14 and the notch 15 formed on the outflow side of the magnetic disk, respectively.
A felt 12°13 is stretched to a thickness substantially equal to the height I (4+15).Furthermore, similarly to the magnetic head structure of the first embodiment, the step on the side surface of the setting portion 6 is A felt 5 having a thickness substantially equal to the height H of the setting part 6 is stretched along the side of the slider 11 facing the setting part 6 at a desired distance W from the part 6b. .

In the magnetic head structure of the second embodiment, felts 12 and 13 are provided around the setting portions 6 of the read/write core 2 and erase core 4, and also on the inflow and outflow sides of the magnetic recording medium. The felt surface occupies a larger area on the sliding surface.

The rate at which all the magnetic disks are worn out by hard sliders and the like is reduced, and the dust adsorption efficiency is improved, so the effect of extending the useful life of the magnetic disk becomes significant. Furthermore, since vibrations of the magnetic recording medium can be absorbed on the magnetic disk inflow side and outflow side of the setting section 6, the adhesion between the read/write gap 3 and erase gap 9 and the magnetic recording medium is further improved. High S/N recording and playback can be performed.

The gist of the present invention is a magnetic head structure in which a magnetic head and a slider are integrally formed.

At least a part of the media sliding surface of the slider is made of a flexible material with excellent lubricity. /The combination method of the write head and erase head is not limited to those listed in each of the above embodiments, but can be selected as appropriate6.For example, as a flexible material, in addition to felt, non-woven fabric or Foamed plastic or the like can also be used.

Furthermore, in each of the above embodiments, the case where the present invention is applied to a dual-sided recording type drive device has been described.

The gist of the present invention is not limited to this.

Of course, the present invention can also be applied to a single-sided recording type drive device in exactly the same way.

〔Effect of the invention〕

As explained above, in the magnetic head structure of the present invention, a part of the medium sliding surface of the slider is made of a flexible material with excellent slipperiness, so that the entire magnetic recording medium can slide against the hard slider. This reduces the frequency with which the magnetic film is worn out and peels off, and the service life can be extended. Also, dust and other particles that adhere to the surface of the magnetic recording medium are absorbed by the flexible material.

Dust is not rubbed against the magnetic recording medium by the hard slider, and from this point of view as well, the service life of the magnetic 18 recording medium can be extended.

Furthermore, 1! Even if the magnetic recording body vibrates when the fir is moving, the force is absorbed by the flexible material, and no upward force is applied to the magnetic head structure.

Therefore, the magnetic recording medium can always be brought into sliding contact with the magnetic gap, and the S/N ratio will not deteriorate.

[Brief explanation of the drawing]

1 is a perspective view of a magnetic head structure according to a first embodiment of the present invention, FIG. 2 is a sectional view illustrating the effects of the magnetic head structure of the first embodiment, and FIG. 3 is a perspective view of a magnetic head structure according to a first embodiment of the present invention. FIG. 1 is a perspective view of a magnetic head structure according to one embodiment. Figure 4 is a front view of the main parts of a conventionally known magnetic disk drive, Figure 5 is a perspective view of the magnetic head structure, and Figure 6 is a front view of the main parts of a conventionally known magnetic disk drive.
The figure is a sectional view illustrating the close point of a conventional magnetic head structure. l Nislider, 2: Read/Write core, 3: Read/
Write gap, 4: erase core. 5: Felt, 6: Setting part, 7e7a: Chamfer. 8: air vent groove, 9: erase gap, 10: magnetic recording medium, 11 varnish slider, 12.11 felt, 14,
15: Notch part 1 Figure 1: Also like 5. Tsubasai 2: R/
W co-completed 6: Give up 3: pIw-=, 1.
7.7a: 4: I L-
8: Kankyutaki 5 *Figure 2 Figure 3 Figure 5 Figure 6

Claims (3)

[Claims] (1) A magnetic head structure in which a magnetic head and a slider are integrally formed, characterized in that a part of the medium sliding surface of the slider is made of a flexible material with excellent slipperiness. body. (2) In the magnetic head structure according to claim 1, a part of the medium sliding surface of the slider is made of a flexible material with excellent slipperiness selected from felt, nonwoven fabric, and foamed plastic. A magnetic head structure featuring: (3) In the magnetic head structure according to claims 1 and 2, a setting portion of the magnetic head is provided protrudingly along one side of the slider, and an air vent groove extends in the transport direction of the magnetic recording medium. 1. A magnetic head structure characterized in that a flexible material with excellent slipperiness is stretched on a side portion facing the magnetic head setting portion via a flexible material. (3) In the magnetic head structure according to claims 1 and 2, a setting portion of the magnetic head is provided protrudingly along one side of the slider, and an air vent groove extends in the transport direction of the magnetic recording medium. A flexible material with excellent slipperiness is provided on the side facing the magnetic head setting section via the magnetic head setting section, and a flexible material with excellent slipperiness is provided on a portion adjacent to the medium inflow side and a portion adjacent to the medium outflow side of the magnetic head setting section. A magnetic head structure characterized by being covered with a flexible material with excellent slipperiness.