JPH07105542A - Optical disk device - Google Patents

Abstract

PURPOSE:To surely execute dustproofing of the lens of an optical head and to decrease the man-hours for fixing the optical head by holding the optical head in a storage section by a permanent magnet while recording and reproducing are not executed. CONSTITUTION:The optical head 3 is moved in a direction A by a VCM magnet 4 and the actuator part of the head 3 is surely stored when recording or reproducing of information is not executed. The head 3 is held by the permanent magnet 7 at this time. A magnetic member is mounted at the end face of the head 3 facing the permanent magnet 7. The holding force of the permanent magnet 7 is so set as to be weaker than the driving force of the head 3 generated by the VC magnet 4 and stronger than the force acting on the head 3 by gravity. Then, the head 3 is kept fixed even if the optical disk device is held upright when the power source of the optical disk device is turned off.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc device for recording or reproducing information on an optical disc medium,
In particular, it relates to dustproof measures for the optical head and protection measures for the optical head during movement.

[0002]

2. Description of the Related Art A lens attached to an optical head of an optical disk device for recording or reproducing information on an optical disk medium is apt to be dusted in the air due to static electricity or the like. Dust prevention measures are taken by means such as removing dust adhering to the lens with a cotton swab or a cleaner, or by providing a dedicated mechanism for removing dust in the optical disk device.

Further, since the VCM magnet is used for driving the optical head, the optical head is in a non-fixed state when the power source of the optical disk device is cut off. Therefore, in order to prevent the optical head from being damaged by the movement of the optical disc device, it is necessary to fix the optical head when moving the optical disc device.

[0004]

As described above, in the conventional optical disc device, when the work of removing dust with a cotton swab or a cleaner is carried out at the time of maintenance as a dust-proof measure of the lens attached to the optical head. However, there is a drawback in that a sufficient dust removing effect may not be obtained due to variations in maintenance intervals and individual differences among workers.

Further, when a dedicated mechanism is provided as a dustproof measure for the lens, there is a drawback that the number of parts and the number of assembling steps increase and the cost increases.

Furthermore, since the work of fixing the optical head must be performed when moving the optical disk device,
There is a problem that extra man-hours are required.

[0007]

An optical disk device of the present invention stores an optical head for recording or reproducing information on an optical disk medium and an actuator section of the optical head when the information is not recorded or reproduced. And a permanent magnet that holds the optical head stored in the storage unit.

[0008]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is a front view showing an embodiment of the present invention.
FIG. 2 is a view showing a state when information is recorded or reproduced, and FIG. 2 is a front view showing a state when information is not recorded or reproduced in the embodiment of FIG.

In FIG. 1, an optical disk device 8 mounts and rotates an optical disk medium 1 on a spindle motor 2, and an optical head 3 records or reproduces information on or from the optical disk medium 1. The optical head 3 is driven by the VCM magnet 4, guided by the guide 5 in a linear motion and restricted in a motion range, and linearly moves in the radial direction of the optical disk medium 1. The storage unit 6 surely stores the actuator unit of the optical head 3 in a region where the optical disk medium 1 does not exist within the movement range of the optical head 3.

Next, the operation of the optical disk device 8 configured as described above will be described with reference to FIGS. 1 and 2.

As shown in FIG. 1, when the optical disc medium 1 is inserted through the medium insertion slot 9, a sensor (not shown) provided in the optical disc device 8 detects that the optical disc medium 1 has been inserted. As a result, the spindle motor 2 is in a state in which the optical disk medium 1 is mounted and rotated to complete loading.

Next, the optical head 3 includes a VCM magnet 4
Driven by the guide 5, and guided linearly in the radial direction of the optical disc medium 1 by being guided by the guide 5. When a sensor (not shown) detects that the optical head 3 has entered the area of the optical disc medium 1, the optical head 3 irradiates the optical disc medium 1 with laser light via an attached lens,
Information is recorded on or reproduced from the optical disc medium 1.

When information is not being recorded or reproduced, the optical head 3 is moved in the direction of arrow A by the VCM magnet 4 as shown in FIG. Be stored securely in. When the actuator section of the optical head 3 is stored in the storage section 6, the optical head 3 is held by the permanent magnet 7. For this reason, a magnetic member is attached to the end surface of the optical head 3 facing the permanent magnet 7. Permanent magnet 7
Is set to be weaker than the driving force of the optical head 3 generated by the VCM magnet 4 and stronger than the force of the optical head 3 moving under its own weight. Therefore, when the power source of the optical disc device is turned off, the optical head 3 can be fixed even when the optical disc device is in an upright state.

[0015]

As described above, the optical disk device of the present invention is provided with the storage section for storing the optical head when information is not recorded or reproduced on the optical disk medium, and the optical disk stored in the storage section is provided. By holding the head with a permanent magnet, there is an effect that it is possible to reliably protect the lens of the optical head from dust at low cost.
Moreover, since the optical head can be fixed automatically, the number of steps for fixing the optical head can be reduced.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention, showing a state when information is recorded or reproduced.

FIG. 2 is a front view showing a state in which information is not recorded or reproduced in the embodiment of FIG.

[Explanation of symbols]

 1 Optical Disc Medium 2 Spindle Motor 3 Optical Head 4 VCM Magnet 5 Guide 6 Storage 7 Permanent Magnet 8 Optical Disc Device 9 Media Insertion Port

Claims (2)

[Claims] 1. An optical head for recording or reproducing information on or from an optical disc medium, and a storage section for storing an actuator section of the optical head when information is not recorded or reproduced. Optical disk device. 2. The optical disk device according to claim 1, further comprising a permanent magnet for holding the optical head stored in the storage unit.