JP3116516B2 - Optical disk cartridge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a replaceable optical disk cartridge containing a disk medium for recording and reproducing optical information.

Recently, as information from various computers is recorded on a recording surface of an optical disk medium at a high density, the standardization of a 3.5-inch optical disk follows the standardization of an ISO standard of a 5-inch optical disk. It is expected to be widely used in households.

However, in an optical disk apparatus for recording and reproducing the information, an error is apt to occur in recording and reproduction when dust or dust adheres to the surface of the disk medium during operation. The surface of the disk cannot be wiped with a brush or a cleaner, and its countermeasures have been highlighted as the most important issue that affects the reliability of information, so that dust attached to the surface of the disk medium can be easily and easily removed. There is a demand for a new optical disk cartridge that can be used.

[0004]

2. Description of the Related Art As shown in FIG. 4A, an optical disk cartridge which has been widely used is a thin plate having a substantially square outer shape and a hollow portion having a size capable of accommodating a disk-shaped optical disk medium 3-1 therein. And a cartridge case made of a synthetic resin in which shutter windows 3-2a reaching the center from one side edge of the square are opened on both sides thereof so as to face each other.
As shown in FIG. 4B, the optical disk medium having a disk-shaped light beam incident surface for recording optical information as shown in FIG.
1 is housed in the hollow portion, and a dustproof shutter (not shown) is openably and closably disposed with respect to the shutter window 3-2a. When the optical disk cartridge is mounted on the optical disk device, the shutter window 3-2a is opened. Are automatically opened and the stored disk medium 3-1 is rotated.

[0005] Further, as an optical disk cartridge provided with a dust removing means, Japanese Patent Application Laid-Open No. 61-68888, Japanese Patent Application Laid-Open No. 61-239483 and Japanese Patent Application Laid-Open No. 2-1933 have been disclosed.
As shown in Japanese Patent Publication No. 78, a cleaning member for removing dust attached to the optical disk medium is fixed directly to the inner surface of the cartridge case or via a member such as a lifter, and is always attached to both sides or one side of the optical disk medium. It is configured so that the parts for contact are in contact.

[0006]

The problem with the conventional optical disk cartridge described above is that when the optical disk medium 3-1 mounted on the optical disk device and rotated is rotated, dust in the optical disk cartridge 3 is removed. When the optical disk medium 3-1 stops, it will adhere to the surface again when the optical disk medium 3-1 is stopped. If the optical disk cartridge 3 is used for a long time, the amount of dust will increase in the worst case, and the information will be read and written. There is a problem that can not be done.

Further, JP-A-61-68888, JP-A-61-239483 and JP-A-2-193.
In the "disk cartridge" disclosed in Japanese Patent Publication No. 378, the cleaning member is always in contact with the surface of the optical disk medium.
The surface of a high-speed rotating optical disk medium is scratched by the cleaning member, and the dust attached to the cleaning member accelerates the generation of the scratch itself, so that it is difficult to ensure long-term reliability.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a new optical disk cartridge which can easily and surely remove dust adhering to an optical disk medium and can maintain the dust removing effect for a long period of time.

[0009]

According to the present invention, as shown in FIG. 1, an optical disk cartridge for storing an optical disk medium is provided.
The light beam incident surface 3-1a of the optical disc medium 3-1
The magnetized member is attached to the inner surface of the cartridge case
That is, the rubber magnet 14-2 and the cleaning member, that is, the cleaning cloth 14-1 are connected.
One end of the rubber magnet 14-2 of the dust removing member 14
Cleaning cloth 14-1 is attached to the inside of the cartridge case 3-2.
Is provided so that it can be separated from the inner surface of the cartridge case 3-2.
And and dedusted member 14, the optical disk cartridge 3-2
A drive unit (not shown) is provided corresponding to the dust removing member 14.
Magnetically repelled or attracted by the electromagnet 15
Sweep 14-1 on the light beam incident surface 3-1a of the optical disc medium 3-1
It is configured to contact or separate . In addition, the contact
Or the separation switches the direction of the current flowing through the electromagnet 15
Configuration. In addition, switching of the contact or separation
In other words, it will be performed in a timely manner as needed.

[0010]

According to the present invention, as shown in FIG.
An optical disc cartridge 13 provided on the inner surface of a cartridge case 3-2 opposed to the light beam incident surface 3-1a of the optical disc medium 3-1 is provided with a dust removing member 14 having a rubber magnet 14-2 disposed behind the optical disc cartridge 13-2.
When the magnet 15 is inserted, the electromagnet 15 is positioned outside the cartridge case 3-2 at a position corresponding to the rubber magnet 14-2 of the dust removing member 14.
When the rotation of the optical disk medium 3-1 chucked by the spindle 2 is started and stopped, a current in a certain direction is applied to the coil of the electromagnet 15 for a certain time as shown in FIG. The dust adhering to the light beam incident surface 3-1a can be wiped by lightly bringing the soft cleaning cloth 14-1 into contact with the surface of the optical disk medium 3-1 due to the repulsion of the rubber magnet 14-2.

When the optical head 1 is accessed to record / reproduce information on the optical disc medium 3-1, the information shown in FIG.
By attracting the rubber magnet 14-2 with the polarity of the power supply applied to the coil of the electromagnet 15 reversed as shown in FIG.
14 cleaning cloth 14-1 and light beam incident surface of optical disc medium 3-1
Since a gap is formed between the optical disk medium 3-1a and the optical disk medium 3-1a, contact with the optical disk medium 3-1 is minimized, and the dust removing effect can be maintained for a long time.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to FIGS. FIG. 1 is a schematic view showing an optical disk cartridge according to the present embodiment, FIG. 2 is a perspective view showing a dust removing member of the present embodiment, FIG. 3 is a side sectional view of a driving method of the dust removing member,
In the drawing, the same members as those in FIG. 4 are denoted by the same symbols, but the other 14 is a dust removing member for wiping dust adhered to the surface of the optical disk medium, and 15 is an electromagnet for driving the dust removing member to the surface of the optical disk medium. It is.

As shown in FIG. 2, the dust removing member 14 is provided with a microfiber fiber on a surface of the rubber magnet 14-2, which is magnetized in the thickness direction such that the inner surface of the case becomes an N pole, facing the optical disk medium 3-1. A flexible cleaning cloth 14-1 woven from, for example, is attached.

As shown in FIG. 3, the electromagnet 15 is a general-purpose electromagnet whose size is such that the dust removing member 14 can be magnetically attracted and repelled, and the direction of the magnetic force lines becomes opposite when the polarity of the power supply applied to the coil is changed. It is.

The optical disk cartridge 13 of this embodiment is
As shown in FIG. 1 (a), a cartridge similar to the conventional one having a thin plate having a substantially square outer shape, having a hollow portion for accommodating the optical disk medium 3-1 therein, and shutter windows 3-2a provided on both sides thereof, respectively. As shown in FIG. 1B, one end of the rubber magnet 14-2 of the dust removing member 14 is attached to the case 3-2.
The adhesive is applied to the center of the optical disk medium 3-1 opposite to the shutter window 3-2a provided in the cartridge case 3-2 on the light beam incident surface 3-1a, ie, the inner surface opposite to the surface irradiated with the laser light. By being fixed at 14-3, the portion other than the fixed portion is arranged so as to be freely bent toward the optical disk medium 3-1.

The driving means for the dust removing member 14 is shown in FIG.
As shown in (a), the optical disk cartridge 13 is inserted into the optical disk device, and the optical disk medium 3-
When chucking 1, cartridge case 3-
The electromagnet 15 for driving the rubber magnet 14-2 of the dust removing member 14 disposed inside the cartridge 2 in the direction perpendicular to the optical disc medium 3-1 is connected to the rubber magnet 14 through the cartridge case 3-2.
The optical head 1 is provided inside the apparatus on the side where the optical head 1 is provided so as to correspond to 14-2.

The dust removing member 14 is driven to remove the dust adhering to the optical disc medium 3-1. As shown in FIG. 3B, the optical disc cartridge 13 is inserted and chucked by the spindle 2. When the rotation of the optical disk medium 3-1 is started and stopped, a current is applied to the coil of the electromagnet 15 for a certain period of time to make the optical disk cartridge 13 side an N pole, thereby disposing the coil on the inner surface of the cartridge case 3-2. A rubber magnet having an N pole on the side facing the electromagnet 15
14-2 is repelled and a flexible cleaning cloth 14-1 is applied to the optical disk medium 3-
Lightly contact the light beam incident surface 3-1a of Step 1.

When recording / reproducing information on the optical disk medium 3-1 by accessing the optical head 1, FIG.
By changing the polarity of the power supply applied to the coil of the electromagnet 15 to reverse the lines of magnetic force and making the optical disk cartridge 13 side S-pole as shown in FIG.
2 attract the rubber magnet 14-2 arranged on the inner surface of the cleaning cloth 14-1
A gap is formed between the optical disk medium 3-1 and the light beam incident surface 3-1a.

The dust removing member 14 is brought into contact with the surface of the optical disk medium 3-1 only when the rotation is started and stopped as described above. Optical disk medium 3-1 at 3000 rpm under accelerated dust environment of class 10 million
The light beam entrance surface after 2 laps, 1 month, and 3 months after repeating rotation start and stop twice a day
3-1a was observed.

As a result, when the dust removing member 14 was always in contact with the optical disk medium 3-1, a slight scratch was generated on the surface of the optical disk medium 3-1 after two rounds.
One month later, the number of scratches increased considerably and the reflectance was 3
After three months, the scratches were innumerable, the surface became cloudy, and the reflectance was reduced by 25%.

However, in this embodiment, the dust removing member 14 is brought into contact with the optical disk medium 3-1 only at the start and stop of rotation, and no scratch is generated even after three months, and the dust removing member is formed by the magnetic force of the electromagnet 15. The 14 flexible cleaning cloths 14-1 lightly touch the light beam entrance surface 3-1a of the optical disc medium 3-1 to wipe off any attached dust, minimizing the need for contact with the dust removal member and removing dust. Can be maintained for a long time.

[0022]

As is apparent from the above description, according to the present invention, it is possible to easily and surely remove dust adhering to an optical disk medium with a very simple structure and to maintain the dust removing effect for a long period of time. It is possible to provide an optical disk cartridge that has advantages, and is expected to have significant economical and reliability improvement effects.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an optical disk cartridge according to one embodiment of the present invention.

FIG. 2 is a perspective view showing a dust removing member of the present embodiment.

FIG. 3 is a side sectional view illustrating a dust removing member driving method according to the present embodiment.

FIG. 4 is a schematic view showing a conventional optical disk cartridge.

[Explanation of symbols]

1 is an optical head, 1a is a laser beam,
2 is a spindle, 3-1 is an optical disk medium,
3-1a is the light beam incident surface, 3-2 is the cartridge case,
3-2a is a shutter window, 13 is an optical disk cartridge, 14 is a dust removing member, 14-1 is a cleaning cloth,
14-2 is a rubber magnet, 14-3 is an adhesive, 15 is an electromagnet,

Continued on the front page (72) Inventor Akio Futama 1015 Uedanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture Inside Fujitsu Co., Ltd. Person Yoshihide Fujita 1015 Ueodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture Inside Fujitsu Limited (56) References JP-A-3-80489 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G11B 23/50

Claims (3)

(57) [Claims] 1. A optical disk cartridge for housing the optical disk medium, the magnetization member to the inner surface of the cartridge case facing the light beam incident surface of the optical disk medium
One of the magnetized members of the dust removing member combined with the cleaning member.
The cleaning member is fixed by fixing an end to the inner surface of the case.
The case is provided so as to be able to be separated from the inner surface of the case, and the dust removing member is configured to drive the optical disk cartridge.
An electromagnet disposed on the moving device side in correspondence with the dust removing member
Magnetically repelled or attracted by the cleaning member
Contact or separation with the light beam incident surface of the optical disk medium
An optical disc cartridge characterized in that it is configured to perform 2. The method according to claim 1, wherein the contact or separation is performed through the electromagnet.
2. The optical disc cartridge according to claim 1 , wherein the direction of the current to be applied is switched . 3. The switching of contact or separation is required.
2. The optical disk cartridge according to claim 1 , wherein the operation is performed in a timely manner in accordance with the following conditions .