JPH0316070A - Cleaning disk - Google Patents

Abstract

PURPOSE:To simultaneously clean not only an objective lens but also the surface of a head slider in a magneto-optical disk device by flocking thin hairs on one face part of a disk, and applying abrasives to the other face part. CONSTITUTION:On a cleaning disk 2, one face is provided with a hair-flocked part 12 in the radial direction of the disk, and the face on which a magnetic head is placed is provided with a cleaning film 10 formed by dispersing abrasives such as alumina powder, etc., sticking it on the surface of the disk by a thermosetting resin, and also, impregnated with a lubricant. In such a way, when the cleaning disk 2 is contained in a cartridge 4 and inserted into a magneto-optical disk device, an objective lens 20 comes into contact with the hair-flocked part 12, stuck matters on the surface of the lens is removed, and also, as for a slider part of the magnetic head, stuck matters on the slider surface is removed by abrasives 22 such as alumina powder, etc., protruding onto the cleaning film 10.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cleaning disk for a magneto-optical disk device that enables cleaning of the objective lens and magnetic bias magnetic head 'Jk of an optical big add section. It is. [Prior Art] In a conventional magneto-optical disk device, the magnetic bias coil 3 for generating a magnetic field of several hundred oersteds is positioned independently with respect to the disk l. Gap greater than the amount of deflection (approximately 0.
If it is necessary to separate the coils so that they have a distance of 2 m or more, the number of turns in the coil must be increased to generate a magnetic field, which results in an increase in inductance. By the way, the pumping speed as a dowiping device is the lowest I Mkl
If it is greater than or equal to z. The magnetic field reversal speed of the a bias coil is insufficient. Therefore, in general, when writing data, first irradiate a laser beam with a bias magnetic field in a fixed direction.
A so-called erase operation is performed in which the magnetization direction of the medium surface is set in a fixed direction, and then, as a write operation, the bias magnetic field is reversed to the direction opposite to that during erase, and the laser is irradiated as data only when the magnetization direction is opposite to the erase magnetization direction. Then, the data will be written. Therefore, the write operation requires two rotations, one rotation for erasing and one rotation for writing. Therefore, a disk is configured with a transparent plate, a magneto-optical medium film and a protective film on top of the transparent plate, and an optical pickup device for writing and reading magneto-optical signals by irradiating the magneto-optical medium with a laser beam is installed on the disk. A magnetic head for magnetic bias is positioned on the protective film side of the disk facing the optical pickup, and is levitated or slid by relative movement with the disk. Therefore, the distance from the disk surface can be as small as 0.1 to several μm.And since this magnetic head is on the protective side of the disk, the magneto-optical characteristics can be kept small to minimize the distance from the medium. In order to create a magnetic field of the required strength in the medium gland, the number of turns of the winding is reduced to reduce the inductance and magnetic field reversal time, and the magnetic head for magnetic bias allows the writing frequency to be increased in the several MHz band. If this is possible, we will be able to have a lot of respect. [Problems to be Solved by the Invention] However, magneto-optical disks are mainly removable from devices, and depending on the storage conditions and how they are carried, dust may adhere to the disks. Even in magneto-optical disk drives, it is difficult to completely prevent dust from entering. For the above reasons, the dust islands attached to the disk surface are inserted into the gap between the disk and the magnetic head while the disk is running, causing the magnetic head to collide with the disk, a so-called head crash. As a result, the protective @ film is damaged and eventually the recording at- is also destroyed. 1.For the same reason as above, if there is a layer of dust on the objective lens of the optical pickup,
The laser light power necessary for recording and playback cannot be obtained, and recording and playback cannot be achieved.
The drawback was that playback was impossible. [Purpose] The present invention has been made in view of the problems of the prior art described above, and its purpose is to improve the preservation of magneto-optical disks! Another object of the present invention is to provide a cleaning/cleaning disk for a magneto-optical disk device, which prevents destruction of recording glands, etc., and makes it possible to secure laser light power necessary for recording and reproducing in a housing.

[Means to solve the problem]

According to the present invention, the above object is a disk loaded into a magnetic disk device. One surface of the disk is flocked with fine hairs such as fibers or a cloth-like material is tangled, and the other surface is coated with an abrasive such as alumina powder or the surface is coated with abrasives such as alumina powder. This is achieved by cleaning disks for magneto-optical disk drives, which are characterized by a roughened condition.

〔Example〕

Hereinafter, embodiments of the present invention will be explained specifically and in detail based on gold drawings. Figure 1 (a) is a perspective view showing a cartridge housing in which the cleaning disk of the present invention is housed.

As shown in FIG. 1(&), the cleaning disk 2 of the present invention is housed inside a rectangular cartridge 4.
The cartridge 4 has a shutter 6 that opens and closes an opening provided in the cartridge lithium. Although this embodiment shows a button in which the cleaning disk 2 is provided inside the cartridge, the present invention is not limited to this, and the cleaning disk used in a non-cartridge type magneto-optical disk device may also be used. shall be included.

FIG. 1(b) is a perspective view of the cleaning disk housed in the cartridge of Jg 1 a (a), viewed from the optical pickup side.

As shown in the figure, the cleaning disk 2 has four flocked capitals 12 on one surface thereof, which are flocked in the radial direction of the disk. The hairs of the flocked portion 120 are made of fine hairs such as synthetic fibers.

FIG. 1(e) is an enlarged sectional view of section A shown in FIG. 1(b). Incidentally, the Creeney/Goodix 2 shown in FIG. 1(c) shows a case in which a magnetic head is disposed above and an optical pickup is disposed below.

As shown in FIG. 1(e), an abrasive such as alumina powder is dispersed on the surface of the magnetic head on the side where the magnetic head is disposed using the same method as that used for coated type magnetic disks. The disk has a Cleaner/Gua10 adhesive which is adhered to the disk surface using a thermosetting resin and is also impregnated with lubricant. The cleaning disk 2 of the present invention has a flocked part 12 on the surface on which the objective lens for optical pickup is provided, which is made of fine synthetic fibers either entirely or optionally. When the cleaning disk 2 constructed as described above is housed in the cartridge 4 and inserted into a magneto-optical disk device, the spindle motor rotates as the disk is mounted, and the objective lens 20 (the first (shown in FIG. 2) comes into contact with the flocked part 12 to remove deposits on the lens surface. Furthermore, deposits on the slider surface of the magnetic head can be removed by using an abrasive agent 22 such as alumina powder that protrudes onto the cleaning film 10. 28 is the core of the magnetic head.

In the above explanation, the surface of the objective lens was cleaned using the flocked part 12, but in the cleaning disk of the present invention, instead of the flocked part 12, a cloth-like material 30 as shown in FIG. 3 is used. may be used by adhering it to the disk surface.

! The cleaning/greasing exchange 10 for cleaning the magnetic head has a similar effect even if it does not contain an abrasive and roughens the surface condition of the smeared glands.

〔Effect of the invention〕

As described above, by using the cleaning disk of the present invention, it is possible to clean not only the objective lens but also the magnetic head slider surface of a magnetic disk device at the same time.

Therefore, when malfunctions occur during recording and reproduction of the magneto-optical disk device, or by periodically using the cleaning disk of the present invention, the objective lens and the magnetic head can be cleaned at the same time, allowing accurate recording and reproduction. becomes possible. In addition, it is possible to prevent foreign matter adhering to the Isoke head from being transferred to other disk-shaped recording media.

[Brief explanation of drawings]

FIG. 1 (&) is a perspective view showing a cartridge in which a cleaning disk of the present invention is housed;
11[b] is a perspective view of the cleaning disk housed in the cartridge in FIG. 1(a) when viewed from the optical pickup side;
) is an enlarged sectional view of part A shown in FIG. 2...Cleaning disk, 10...Cleaning membrane, 12...Flocked part. Figure 1 4--Sword - Tososo Tsuji

Claims (1)

[Claims] (1) A disk that is loaded into a magneto-optical disk device, in which one side of the disk is flocked with fine hairs such as synthetic fibers or a cloth-like material is glued, and the other side is covered with alumina powder. 1. A cleaning disk for a magneto-optical disk device, characterized in that it is coated with an abrasive such as, or has a roughened surface.