JP2510106B2 - Optical disk drive - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk device,
In particular, the present invention relates to an optical disk device that requires cleaning of an objective lens.

[0002]

2. Description of the Related Art Conventionally, there is a type in which an optical disk device does not have a cleaning mechanism for its objective lens at all,
There are two types, which are built-in, but which perform simple cleaning such that the objective lens is simply swept when the disk is attached or detached or the power is turned on.

Therefore, in order to perform a complete cleaning, it is necessary to use a cleaning-dedicated adapter, which is separate from the optical disk body, or to periodically clean the objective lens by directly wiping it with a cotton swab or the like.

FIG. 6 is a diagram showing the structure of a cleaning mechanism of the type which performs the above-mentioned simple cleaning.

The disc 1 housed in the cartridge 4 is clamped by a spindle table 3 and a clamper 2 and rotated, and an objective lens 8 for reading the record of the disc 1 is read.
The optical head 7 having the above is mounted on the carriage 5 and moves on the chassis 21.

The cleaner 9 located on the opposite side of the objective lens 8 with the disc 1 interposed therebetween is lowered during cleaning, and the brush-shaped tip portion of the cleaner 9 comes into contact with the objective lens 8 to rotate for cleaning.

Here, the carriage 5 is set so as to move within a range in which the objective lens 8 scans only the recording surface of the disk (the area indicated by A in the figure). Therefore, the cleaning operation in which the cleaner 9 comes into contact with the objective lens 8 has been performed in a state where the disk 1 is not mounted.

[0008]

As described above, in the conventional optical disk device, the objective lens cannot be cleaned while the disk is mounted.

Depending on the user, the same disc may be used for a long period of time with the disc mounted, or may be left as it is. In this case, since the disc is always mounted in the optical disc, the cleaning mechanism for the objective lens does not operate, and the objective lens is exposed for a long time.

Therefore, there is a problem that not only the dust descends and accumulates on the objective lens during this period, but also moisture in the air is condensed on the objective lens and the dust is firmly fixed to the objective lens.

Therefore, the present invention has been made in view of the above-mentioned problems, and an optical disk device capable of automatically cleaning the objective lens even when the disk is mounted and capable of preventing dust from adhering to the objective lens when not in operation. The purpose is to provide.

[0012]

According to a first aspect of the present invention, a carriage on which an optical head is mounted is movable from a first predetermined position on the disk surface to a second predetermined position outside the outermost circumference of the disk. An optical disk device comprising: a carriage moving unit; and a cleaning unit that cleans an objective lens mounted on the optical head when the carriage moves to the second predetermined position. Means for cleaning the carriage, an operation for moving the carriage to a predetermined position on the disk surface, and an operation for moving the carriage from an arbitrary position on the disk surface to the second predetermined position in response to a reproduction or recording operation end command. An operation of cleaning the objective lens by the cleaning means and holding the cleaning means at a position to cover the objective lens. A moving means, a structure having a control means for controlling said cleaning means.

According to a second aspect of the present invention, there is provided a fixing means for fixing the carriage to the objective lens cleaning position outside the outermost periphery of the disk in the non-operating state.

[0014]

According to the first aspect of the present invention, the movement of the carriage outside the outermost periphery of the disk can activate the cleaning means even when the disk is mounted.

Holding the cleaning means at a position covering the objective lens eliminates the exposure of the objective lens when it is not in operation.

According to the second aspect of the present invention, the fixing means for fixing the carriage to the objective lens cleaning position accurately positions the objective lens cleaning position and prevents movement of the objective lens during cleaning and during non-operation.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the essential parts of one embodiment of the present invention.
(A) is the top view, (B) is sectional drawing which followed the II line shown in (A).

The disk 1 housed in the cartridge 4 is nipped and rotated by the spindle table 3 and the clamper 2. The carriage 5 is provided with bearings 6a, 6b, 6c, and the carriage 5 is movable on the chassis 21 in the radial direction of the disk 1.

An optical head 7 which is vertically movable (moving mechanism is not shown) is mounted on a carriage 5, and an objective lens 8 is attached to the head 7 via a focusing / tracking actuator (not shown).

FIG. 1 shows a state in which the carriage 5 is moved to the cleaning position and fixed. In this state, the sub-chassis 18 fixed to the chassis 21 is located above the carriage 5, the sub-chassis 18 is provided with the cleaner 9 and the lock pin 17, and by the motor 14 also fixed to the sub-chassis 18, Gears 11, 12,
It has a structure of rotating via 13 (details will be described later).

FIG. 2 is a sectional view taken along line II-II of FIG. The gear 13 is inserted into and fixed to the rotation shaft of the motor 14 fixed to the sub-chassis 18.
Is engaged. A long and slender lock pin 17 that is threaded is fitted and fixed to the gear 12, and the lock pin 17 is mounted on the chassis 1.
It is screwed onto the screw metal 15 fixed to the No. 8.
Therefore, when the motor 14 rotates, the gear 1
The lock pin 17 moves up and down via the rollers 3 and 12 while rotating.

The brush-shaped cleaner 9 is fixed to a cleaner shaft 10, and the cleaner shaft 10 is rotatably supported by a cleaner metal 16 fixed to a sub chassis 18. A gear 11 is inserted and fixed on the opposite side of the cleaner shaft 10 to the side where the cleaner 9 is attached, and the gear 11 meshes with the gear 12. Therefore, the cleaner 9 causes the gears 13, 12,
Rotate through 11.

3A and 3B are views as seen from the direction of arrow III in FIG. 1A. FIG. 3A shows the lock pin 17 at the uppermost position, and FIG. 3B shows the lock pin 17 at the lowermost position. Indicates the status.

As shown in (A), the motor 14 is connected to the gear 1
When rotated clockwise as viewed from the 3 side, the gear 12 rotates counterclockwise via the gear 13, and the lock pin 17 also rotates counterclockwise while moving upward due to the action of the screw to push the lever of the microswitch 19a. Be done. Then, the motor 14 is stopped by the signal from the switch 19a.

When the motor 14 rotates in the opposite direction, the gear 12 moves downward and pushes the lever of the switch 19b as shown in FIG. At this time, the tip of the lock pin 17 is inserted into the fixing hole of the carriage 5, and the carriage 5 is fixed at a predetermined position. Then, the motor 14 is stopped by the signal from the switch 19b.

Since the gear 12 moves up and down integrally with the lock pin 17, the gear 13 and the gear 11 (see FIG. 2).
It has a thickness equivalent to the distance of vertical movement so that it will not disengage with.

Next, the operation of the cleaning mechanism according to this embodiment will be described with reference to the flow chart shown in FIG.

First, the power is turned on (step 1), the disk 1 is inserted into the device (step 2), and the LOAD command is input (step 3).

Then, the motor 14 is started and the cleaner 9
Rotates (step 4), the objective lens 8 is cleaned, and at the same time, the lock pin 17 rises, and the fixing of the carriage 5 is released (step 5).

Next, the carriage 5 moves to the read / write execution position inside the disk 1 (step 6), and the optical head 7 moves up to the normal operation position (step 7).

When a LOAD command is input here (step 3), the disk 1 starts rotating in parallel with steps 4 to 7 (step 8) and stabilizes at a predetermined rotation speed (step 9).

Then, the optical disk device is ready for operation (step 10), and read / write is executed (step 11).

When a series of work is completed, an UNLOAD command is input (step 12), the optical head 7 is lowered (step 13), and the carriage 5 is moved to the outermost position where the cleaner 9 is located (step 14).

Then, the motor 14 starts and the cleaner 9
Is rotated (step 15), the objective lens 8 is cleaned, the lock pin 17 is lowered, and the carriage 5 is fixed (step 16). Therefore, the cleaner 9 is held on the objective lens 8.

Here, when the UNLOAD command is input (step 12), the rotation of the disk 1 is stopped in parallel with the steps 13 to 16 (step 17), and then the disk 1 is ejected (step 20) and the power is turned on. It is cut (step 21).

If the power is turned off while the disk 1 is still mounted without ejecting the disk 1 in step 20 (step 18), the power is turned on again in the next work (step 19). LOA of step 3
Going up from the D command input, the objective lens 8
Cleaning is performed.

The above operation is controlled by a microcomputer built in the apparatus.

As described above, according to this embodiment, the objective lens is cleaned every time the LOAD / UNLOAD command is input regardless of the presence / absence of the disc. Therefore, the power is turned on / off with the disc mounted. However, the cleaning mechanism operates and the objective lens can be kept clean.

Further, from the UNLOAD command, LOAD
Until the D command, that is, when the apparatus is in the non-operating state, the cleaner is held so as to cover the objective lens, so that the surrounding dust is prevented from adhering to the objective lens and the objective lens is kept clean. .

By fixing the carriage, it is possible to prevent the position of the carriage from deviating from the position of the cleaner due to vibration or shock during movement.

Here, as shown in FIG.
In the case where the carriage 5 is housed in the cartridge 4, the optical head 7 moves the opening end 4 of the cartridge 4 when the carriage 5 moves to the outermost outer peripheral cleaning position of the disk 1.
It comes into contact with a. Therefore, the optical head 7 has a moving mechanism (not shown) that is lower than the opening end 4a when the carriage 5 moves.

Further, as shown in FIG. 5, in the conventional optical disk device, the moving direction of the carriage 5 is parallel to the side surface of the optical disk main body, and when the carriage 5 is moved to the outermost outer periphery of the disk 1, the entire device is completed. It becomes large (shown by the dotted line in FIG. 5).

Therefore, in this embodiment, the moving direction of the carriage 5 is set to the diagonal direction h, and the space in the apparatus, which is a conventional space, is utilized to prevent the apparatus from becoming large.

[0044]

According to the first aspect of the present invention, the objective lens is automatically cleaned even when the disc is mounted, and the objective lens is always covered with the cleaner when the apparatus is not operating. It is possible to prevent dust from adhering to. Therefore, it is possible to prevent the performance from being deteriorated due to the dirt of the objective lens for a long period of time, and it is possible to omit the manual cleaning work. According to the second aspect of the present invention, the carriage is fixed when the cleaning mechanism is in operation and when the apparatus is not in operation, and the objective lens is not displaced from the position covered by the cleaner due to vibration or movement shock, and the objective lens is always clean. To be kept.

[Brief description of drawings]

FIG. 1 is a diagram showing a main part of an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a view as seen from the direction of arrow III in FIG.

FIG. 4 is a flowchart of the operation of the embodiment shown in FIG.

FIG. 5 is a diagram illustrating a moving direction of a carriage.

FIG. 6 is a diagram showing a configuration of a conventional example.

[Explanation of symbols]

 1 Disc 2 Clamper 3 Spindle Table 4 Cartridge 4a Open End 5 Carriage 7 Optical Head 8 Objective Lens 9 Cleaner 10 Cleaner Shaft 11, 12, 13 Gear 14 Motor 17 Lock Pin 18 Sub Chassis 19a, 19b Switch 20 Bracket 21 Chassis 22 Fixed Hole

Claims (2)

(57) [Claims] 1. A carriage moving means capable of moving a carriage on which an optical head is mounted from a first predetermined position on a disk surface to a second predetermined position outside the outermost circumference of the disk, and the carriage being the second An optical disk device having a cleaning means for cleaning an objective lens mounted on the optical head when the carriage moves to a predetermined position of the optical head, and an operation of cleaning the objective lens by the cleaning means at startup, An operation of moving the carriage to a predetermined position on the surface, an operation of moving the carriage from an arbitrary position on the disk surface to the second predetermined position in response to a reproduction or recording operation end command, and cleaning the objective lens by the cleaning means. An operation of holding the cleaning means in a position to cover the objective lens, and a carriage moving means and a cleaning means. An optical disk device comprising control means for controlling. 2. The optical disk apparatus according to claim 1, further comprising fixing means for fixing the carriage to an objective lens cleaning position outside the outermost circumference of the disk in a non-operating state.