JPH11339420A - Cleaning apparatus and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve operability for cleaning of magnetic head. SOLUTION: A disk medium 10 is provided, from the internal circumference side, with a read-in 12, a user TOC 14, a recorded area 16 and non-recording area 18. A message such as an application method is recorded previously in the area 16 and thereafter a magnetic head cleaning sheet 20 is attached to almost all areas of the surface opposing to the magnetic head 30 of a disk medium 10. The magnetic head cleaning sheet 20 has the magnetic shielding property and is composed, for example, of a magnetic sheet. Therefore, updating of the user TOC area 14 becomes substantially impossible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device for cleaning a magnetic head of a magneto-optical disk drive and a method of manufacturing the same.

[0002]

2. Description of the Related Art As a cleaning device for cleaning a magnetic head of a magneto-optical disk drive, a configuration is known in which a polishing sheet for lightly polishing the surface of a magnetic head is attached to a disk medium surface facing the magnetic head. . For example, assuming that the optical pickup is also cleaned at the same time, Japanese Patent Application Laid-Open No.
No. 431.

As a magneto-optical disk, there is a mini-disk proposed and commercialized by Sony Corporation as a recording medium for music signals, in addition to a disk used as an external storage device of a computer. This mini disk employs a magneto-optical recording method, and uses both a magnetic head and an optical pickup for recording, but uses only the optical pickup for reproduction.

[0004]

In order to clean the magnetic head, it is necessary to operate the recording / reproducing apparatus in the recording mode and actually record signals. Therefore, when cleaning is repeated,
The unrecorded area becomes smaller. For example, mini-disc
When the system operates in the recording mode, the information for managing the recording start position in the user TOC area provided in the central portion of the disk medium is rewritten for a time corresponding to the recording time or the recording amount, and cleaning is performed. With each repetition, the magnetic head starts from the outer side in the disk radial direction. This means that if cleaning in the recording mode is repeated until the unrecorded area of the disk is exhausted, the recording mode can no longer be selected and cleaning cannot be performed. If you still want to clean it, you must erase any records to make room. In extreme cases, if you forget to start and end cleaning,
The record on the disc must be erased for the next cleaning.

In the case where the optical pickup is cleaned by reproducing a specific signal recorded on the outer peripheral side of the brush for cleaning the optical pickup, the specific signal is erased by an erroneous erasing operation. If done,
Thereafter, the optical pickup cannot be cleaned.

An object of the present invention is to provide a cleaning device which solves such a problem.

[0007]

According to the present invention, a magnetic head cleaning member having a magnetic shielding property is attached to a predetermined area of a surface of the recordable disk medium facing the magnetic head.
As a result, substantially no signal is recorded even by the recording operation for cleaning. That is, the user TOC is not updated. Since the unrecorded area is not substantially consumed, there is no need to erase the record for the next cleaning.

By providing an unrecorded area outside a recorded area in which a predetermined message related to cleaning is recorded, a usage method and the like can be explained.

By attaching the magnetic head cleaning member so as to cover at least the user TOC area, the recording operation at the time of cleaning can be substantially invalidated.

Since the magnetic head cleaning member is adhered to almost the entire surface of the disk medium, the magnetic head has no irregularities, thereby preventing damage to the magnetic head.

The magnetic head cleaning member includes, for example, a cleaning sheet for cleaning the magnetic head directly facing the head, and an adhesive for bonding the cleaning sheet to the disk medium, and the adhesive includes a magnetic shielding material. Alternatively, the magnetic head cleaning member is made of a magnetic sheet to be cleaned by directly facing the magnetic head.

By setting the size of the unrecorded area so that the magnetic head is not excessively cleaned by one cleaning,
Excessive cleaning can be prevented, and cleaning can be automatically terminated.

Further, an optical pickup cleaning member for cleaning the optical pickup is provided on the opposite surface of the disk medium. Thereby, the optical pickup can also be cleaned.

A predetermined signal is recorded on the disk medium, and thereafter, a magnetic head cleaning member having a magnetic shielding property is attached to a predetermined area of a surface of the disk medium facing the magnetic head, thereby recording a desired signal. Cleaning device can be provided.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows a half sectional structure of a disk medium according to an embodiment of the present invention. In this embodiment, the disk medium 10
Is made of a recordable magneto-optical material. The disk medium 10 has a predetermined margin, lead-in 12,
There are a user TOC area 14, a recorded area 16, and an unrecorded area 18 for managing recorded information of the user. In the lead-in area 12, medium identification information indicating the type of the disk (for recording / reproduction / for reproduction only), medium basic information such as recording power and recording time are recorded. In the user TOC area 14, management information of signals such as music recorded in the recorded area 16 is recorded. In the recorded area 16, a voice message such as a usage message is recorded.

A magnetic head cleaning sheet 20 for cleaning the magnetic head 30 is attached to almost the entire surface of the disk medium 10 facing the magnetic head 30. The magnetic head cleaning sheet 20 must include at least the user TOC area 14. Adhering the magnetic head cleaning sheet 20 to almost the entire surface of the disk medium 10 has the advantage that unevenness in the circumferential direction does not occur. By sticking the magnetic head cleaning sheet 20 to the end in the radial direction, even if the user forgets the cleaning end operation from the start of the cleaning in the recording mode, the magnetic head 30 is moved to the end while the recording operation is performed to the end. No bouncing occurs at the step portion at the end of the cleaning sheet 20.

The magnetic head cleaning sheet 20 itself has a magnetic shielding property, and is specifically made of a magnetic sheet or a nonwoven fabric mixed with a magnetic material, and is adhered to the disk medium 10 with an adhesive.

A brush 22 for cleaning the optical pickup is implanted in a recorded area 16 on the medium surface of the disk medium 10 facing the optical pickup 32. Pickup 32
A specific signal to be specified when cleaning is recorded.
By reproducing the specific signal, the optical pickup 32 passes through the portion of the brush 22, and at that time, the optical pickup 3
2 is cleaned.

At the center of the disk medium 10, a metal center plate 24 is mounted.

The method of use of this embodiment and the operation during use will be described. The user mounts the cleaning device of the present embodiment on the recording / reproducing device and selects the recording mode. By the recording start operation by the user, the magnetic head 30 moves the unrecorded area 18
At the innermost position of the disk medium 10 to a position in contact with the medium surface (actually, the magnetic head cleaning sheet 20) of the disk medium 10, and starts the recording operation. During the recording operation, since the magnetic head 30 is in contact with the magnetic head cleaning sheet 20, it is cleaned during this time.

During the recording operation, the magnetic head 30 generates a recording magnetic field, and the optical pickup irradiates the recording position of the disk medium 10 with laser light. The magnetic field generated by the magnetic head 30 is a magnetic head cleaning sheet. Since it is shielded by 20, it does not reach the recording layer of the disk medium 10, or even if it does, it is weaker than a predetermined value. Therefore,
In practice, recording on the unrecorded layer 8 will fail.

In response to the recording end operation by the user, the recording / reproducing apparatus ends the recording, floats the magnetic head 30 and returns to the user TOC area 14, and rewrites the user TOC 14 to the contents according to the recording operation at the time of cleaning. To try. Since the magnetic head cleaning sheet 20 having a magnetic shielding property is also adhered to the user TOC area 14, rewriting of the user TOC area 14 fails as in the recording operation.
Therefore, the recording operation at the time of this cleaning becomes invalid, and the range of the unrecorded area 18 does not change before and after the cleaning. Cleaning of the magnetic head 30 in the next recording mode is also started from exactly the same position. In the case of a recording / reproducing apparatus for verifying rewriting of information in the user TOC area 14, a TOC rewriting error will be displayed, but still, there is no hindrance to the next cleaning.

The mini disk is also used as an auxiliary storage device of a computer. In such a case, the cleaning start message, the cleaning end message, and the message regarding the usage are recorded as data signals having similar contents instead of voice.

A sheet material other than the magnetic head cleaning sheet 20, for example, a nonwoven fabric or a synthetic fiber flocking may be used as long as the magnetic head 30 can be cleaned without damaging the head surface.

In this embodiment, the unrecorded area 18 is not substantially consumed even by cleaning the magnetic head 30.
There is no need to secure a wide unrecorded area 18. The size of the unrecorded area 18 (recordable free space) is determined by the magnetic head 3
If the time is set to a time suitable for zero cleaning, it is possible to prevent the magnetic head 30 from being excessively cleaned. When the magnetic head 30 reaches the end of the unrecorded area 18, the recording operation automatically ends. Since the cleaning is automatically terminated, the operability is improved.

In the embodiment shown in FIG. 1, the magnetic head cleaning sheet 20 itself has a magnetic shielding property, but has a two-layer structure as shown in FIG.
A function of cleaning the magnetic head 30 may be provided as a sheet material coated with synthetic fiber flocking or an abrasive, and the inner layer 20b may have a magnetic shielding property. The inner layer 20b is made of a magnetic sheet or an adhesive mixed with a magnetic material.

In this embodiment, the magnetic head cleaning sheet 20
After affixing, the signal can no longer be recorded substantially. Therefore, it is necessary to record the above-mentioned predetermined signal in the area 16 before bonding the magnetic head cleaning sheet 20 to the disk medium 10. That is, after a predetermined signal is recorded on the disk medium 10, an adhesive is applied to a surface facing the magnetic head 30 or one surface of a sheet material to be the magnetic head cleaning sheet 20, and the sheet material is bonded to the disk medium 10. .

Further, in this embodiment, the signal recorded in the recorded area 16 cannot be erased, so that even if the user accidentally presses the erase button, the recorded area 16 cannot be erased.
Cannot be erased. That is, in this embodiment, erroneous erasure can be prevented. If the optical pickup 32 is cleaned by reproducing a specific signal recorded on the outer peripheral side of the brush 22 for cleaning the optical pickup 32, the specific signal is erased due to such erroneous erasure. Then, the optical pickup 32 cannot be cleaned thereafter. In the present embodiment, such a problem does not occur because the recording signal cannot be erased.

[0030]

As can be easily understood from the above description, according to the present invention, it is possible to eliminate the trouble of erasing the record accompanying the cleaning, and to clean the magnetic head more easily. Further, since it is possible to prevent a recorded message or the like from being erased by mistake, the optical pickup cannot be cleaned. By appropriately setting the size of the unrecorded area, head cleaning can be automatically terminated.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of one embodiment of the present invention.

FIG. 2 is a cross-sectional view of a modified example.

[Explanation of symbols]

 10: Disk medium 12: Lead-in 14: User TOC area 16: Recorded area 18: Unrecorded area 20: Magnetic head cleaning sheet 20a: Surface layer 20b: Inner layer 22: Brush 24: Center plate 30: Magnetic head 32: Optical pickup

Claims (9)

[Claims] 1. A cleaning device for cleaning a magnetic head of a magneto-optical disk drive, wherein a magnetic head cleaning member having a magnetic shielding property is attached to a predetermined area of a surface of the recordable disk medium facing the magnetic head. A cleaning device, characterized in that: 2. The cleaning apparatus according to claim 1, wherein the disk medium has a recorded area in which a predetermined message related to cleaning is recorded and an unrecorded area outside the recorded area. 3. The predetermined range is at least the user TO
The cleaning device according to claim 1, wherein the cleaning device includes a C region. 4. The cleaning device according to claim 1, wherein the magnetic head cleaning member is attached to substantially the entire surface of the disk medium. 5. The magnetic head cleaning member comprises: a cleaning sheet for cleaning directly facing the magnetic head; and an adhesive for bonding the cleaning sheet to the disk medium.
The cleaning device according to claim 1, wherein the adhesive includes a magnetic material. 6. The cleaning device according to claim 1, wherein the magnetic head cleaning member is made of a magnetic sheet to be cleaned directly facing the magnetic head. 7. The cleaning device according to claim 1, wherein the size of the unrecorded area is set so that the magnetic head is not excessively cleaned by one cleaning. 8. The cleaning device according to claim 1, further comprising an optical pickup cleaning member for cleaning the optical pickup on the opposite surface of the disk medium. 9. A method for manufacturing a cleaning device for cleaning a magnetic head of a magneto-optical disk drive, comprising: recording a predetermined signal on a disk medium; and thereafter, a surface of the disk medium surface facing the magnetic head. A magnetic shield cleaning member having a magnetic shielding property is attached to a predetermined area of the cleaning device.