JPH09138963A - Optical disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect an objective lens and an objective lens driving mechanism by reducing the load on the objective lens. SOLUTION: The displacement of a tray 4 to an open position is made not to be hindered even in the optical disk device having the constitution in which the length of the tray 4 in the depth direction is restricted by displaceably supporting a cleaning member 5 to tray 4. Then, the objective lens 9 of an optical head 3 is cleaned with the slidable displacement to the open position of the tray 4 and also the cleaner member 5 is returned to a state performing the cleaning of the objective lens 9 by allowing the cleaning member 5 displaced to the displacement direction of a tray 4 housing position to be abutted with the abutting wall formed in an equipment while displacing the member to the displacement direction of the tray 4 housing position.

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 which a disk is placed on a tray which is slidably displaceable in a housing, and the disk is used to convey the disk into the housing. The present invention relates to an optical disc device including an objective lens cleaner mechanism for cleaning an objective lens of a head.

[0002]

2. Description of the Related Art Some optical disk devices that optically trace a disk rotated by a turntable using an optical head include an objective lens cleaner mechanism for cleaning an objective lens of the optical head.

In such an optical disk device, for example, as disclosed in Japanese Patent Laid-Open No. 7-134836, the objective lens is covered when the tray is displaced to the open position where the disk mounting portion is projected outside the device. It is known that an objective lens is cleaned by providing a brush on the shutter.

[0004]

However, in the optical disk device disclosed in the above publication, the shutter is biased in one direction by the coil spring, and the biasing force is used to move the shutter to the opposite position of the objective lens. It is designed to be displaced.

That is, this optical disk device requires an urging member for urging the shutter in one direction, and the speed at which the shutter is displaced to the position facing the objective lens is directly related to the urging force of the urging member. However, in order to sweep the objective lens, there is a problem that the moving speed of the brush is too fast in terms of dust and dust and protection of the objective lens.

[0006]

SUMMARY OF THE INVENTION The present invention is an optical disk apparatus for carrying a disk by using a tray which is slidably supported by a chassis on which an optical head for optically tracing the disk is mounted. A cleaning unit for cleaning the objective lens of the optical head, and a cleaner member supported by the tray so that the cleaning unit is displaced to a position facing the objective lens in accordance with the sliding displacement of the tray, The cleaner member is displaceably supported with respect to the tray, and when the cleaner member is displaced in the displacement direction of the tray to the storage position, the tray member is displaced to the storage position so that the cleaner member is housed in the device housing. It is configured to be brought into contact with the contact wall formed in the above to return to a predetermined position where the cleaning of the objective lens by the cleaning section is performed.

[0007]

In the optical disc device having the structure in which the length of the tray in the depth direction is suppressed, the end of the tray in the depth direction is displaced forward of the position of the turntable when the tray is displaced to the open position. In addition, since it is necessary to form the cleaner member for cleaning the objective lens of the optical head by projecting to the position where the turntable is arranged according to the position of the objective lens, even if the cleaner member is arranged at the end portion of the tray. When the tray is displaced to the open position, the cleaner portion comes into contact with the turntable, which hinders the displacement of the tray. Therefore, the cleaner member is displaceably supported on the tray so that when the cleaner member contacts the turntable, the cleaner member is displaced so that the displacement of the tray is not hindered. Then, the cleaner member displaced in the direction of displacement of the tray to the storage position by contact with the turntable is displaced to the storage position of the tray to contact the contact wall formed inside the device to bring the objective. I am trying to return to the state of cleaning the lens.

In this case, the contact wall is formed on the chassis, and the cleaner member can be returned to the state in which the objective lens is cleaned only by the drive mechanism portion of the tray including the chassis. You can avoid being affected.

In the case of a cleaner member configured to clean the objective lens by sliding the cleaning unit onto the surface of the objective lens, the cleaning unit is supported by displaceably supporting the cleaner member with respect to the tray. The frictional force generated during the sliding contact between the objective lens and the objective lens is weakened, the load applied to the objective lens is reduced, and the objective lens and the objective lens drive mechanism are protected.

[0010]

1 and 2 are plan views showing respective states of an embodiment of an optical disk device according to the present invention.

In the figure, reference numeral 1 is a chassis on which a turntable 2 for rotating a disk and an optical head 3 for optically tracing the disk mounted on the turntable 2 are mounted.

Reference numeral 4 denotes a disc storage unit 4 for storing discs.
a, the disk storage portion 4a shown in FIG. 1 is stored in an equipment housing (not shown) surrounding the chassis 1, and the disk storage portion 4a shown in FIG. The tray is slidably supported with respect to the chassis 1 between an open position protruding outside the housing.

Reference numeral 5 denotes a cleaner member that is axially supported on one side of the end portion in the depth direction of the tray 4 left in the chassis 1 when the tray 4 is displaced to the open position.
As shown in the cross-sectional view from the back side of FIG. 3, the cleaner member 5 is formed by screwing a leaf spring 7 bent through a washer 6 to a boss 8 formed on the back side of the tray 4. The spring 7 pivotally supports the boss 8 while the convex portion 5a is in contact with the back surface of the tray 4. Further, the cleaner member 5 is provided with a cleaning portion 10 in which a brush is planted on a surface facing the objective lens 9 at a tip position corresponding to the objective lens 9 of the optical head 3.

In the optical disk device thus constructed, when the tray 4 is displaced to the storage position, the cleaner member 5 of the chassis 1 formed by folding back the sheet metal constituting the chassis 1 as shown in FIG. The cleaner member 5 is displaced so as to come into contact with the inner wall of the back surface, and the length direction of the cleaner member 5 is in a state close to the orthogonal direction with respect to the sliding direction of the tray 4.

In the power-on state, the tray 4 is displaced to the storage position, and when the disc is not reproduced, the optical head 3 is displaced to the standby position on the innermost side of the disc shown in FIG. .

In this state, when the slide displacement of the tray 4 to the open position is performed, the cleaning portion 10 of the cleaner member 5 moves on the track of the objective lens 9 of the optical head 3 in accordance with the slide displacement of the tray 4. When the slide displacement of the tray 4 is performed to the vicinity of the open position, the tray 4 reaches the position facing the objective lens 9 of the optical head 3 at the standby position. Therefore, the tray 4
The cleaning unit 10 slides on the surface of the objective lens 9 in accordance with the sliding displacement to clean the objective lens 9 by sweeping. Even if the optical head 3 is displaced to a position other than the standby position, the cleaning unit 10 is displaced on the track along which the objective lens 9 is moved by the displacement of the optical head 3, so that the cleaning unit The objective lens 9 is cleaned by 10.

Further, when the sliding displacement of the tray 4 is performed,
The cleaning unit 10 passes over the objective lens 9, and the cleaner member 5 is brought into contact with the mounting portion 2a of the rotary shaft 11 on the rear surface side of the turntable 2. Therefore, the tray 4 is displaced to the open position while the cleaner member 5 is rotated clockwise in the drawing in accordance with the sliding displacement of the tray 4 thereafter.

By the way, the objective lens 9 is removed by the cleaning unit 10.
When the cleaning is performed, the cleaning unit 10 makes a sliding contact with the surface of the objective lens 9, and since the sliding contact speed corresponds to the sliding speed of the tray 4, the cleaning unit 10 makes a sliding contact with the objective lens 9. Is performed at a constant speed and gently. Therefore, the impact applied to the objective lens 9 during the sliding contact can be suppressed, and the objective lens 9 can be cleaned carefully.

Further, the degree of sliding contact between the cleaning unit 10 and the objective lens 9 is too strong, and the friction force due to the sliding contact causes the objective lens 9 to move.
Even if the impact applied to the tray may be too large, the cleaner member 5 is supported so as to be rotatable and displaceable in the clockwise direction of FIG. Since the leaf spring 7 appropriately adjusts the frictional force generated when the cleaner member 5 is rotationally displaced, the cleaner member 5 rotates when the sliding contact degree between the cleaning unit 10 and the objective lens 9 is too strong. The shock applied to the objective lens 9 is buffered.

On the other hand, when the tray 4 displaced to the open position is slidably displaced to the closed position, the tray 4 is opened while the cleaner member 5 is rotationally displaced by contact with the turntable 2. From the side opposite to the sliding displacement to the position, the cleaning unit 10
Thus, the objective lens 9 is slidably contacted with the lens for cleaning. Then, as the sliding displacement of the tray 4 progresses, as shown in FIG. 4, the tip of the cleaner member 5 is brought into contact with the inner wall of the rear surface of the chassis 1 before the tray 4 is slidingly displaced to the closed position, and then, as shown in FIG. , The tray 4 is slidably displaced to the closed position, and the tip of the cleaner member 5 is brought into contact with the inner wall of the rear surface of the chassis 1 along with the slidable displacement of the tray 4 until the driving of the tray 4 is stopped. In FIG. 4, it is rotated counterclockwise.

Therefore, when the sliding displacement of the tray 4 to the closed position is completed, as shown in FIG. 1, the cleaner member 5 returns the cleaning of the objective lens 9 by the cleaning unit 10 to an appropriate position. This is provided when the sliding displacement of the tray 4 to the open position is performed next time.

In the above-described embodiment, the contact wall against which the cleaner member 5 is contacted is the inner wall of the rear surface of the chassis 1,
Although the cleaner member 5 is returned to an appropriate position for cleaning the objective lens 9 only by the drive mechanism portion of the tray including the chassis 1, when the rear surface for contacting the cleaner member 5 with the chassis 1 is not formed, The contact wall may be an inner wall of a device housing that surrounds the chassis 1.

It is conceivable to use sponge, cloth or the like as the cleaning unit 10 instead of the brush.

[0024]

As described above, according to the present invention, even if the optical disc apparatus has a structure in which the length of the tray in the depth direction is suppressed by supporting the cleaner member on the tray in a displaceable manner, The objective lens of the optical head can be cleaned along with the sliding displacement to the open position, and the cleaner member displaced in the displacement direction to the storage position of the tray is displaced to the storage position of the tray. The objective lens can be returned to the state in which the objective lens is cleaned by abutting the abutting wall formed therein. In addition, the cleaner member can be displaced by the driving force of the tray without using the urging force of the urging member such as the spring, and the speed at which the cleaning unit makes sliding contact with the objective lens is suitable for cleaning the objective lens. Can be speed.

Further, the contact wall can be formed in the chassis, and the cleaner member can be returned to the state in which the objective lens is cleaned only by the drive mechanism portion of the tray including the chassis. You can avoid being affected.

Further, by supporting the cleaner member so as to be displaceable with respect to the tray, it is possible to weaken the frictional force generated at the time of sliding contact between the cleaning portion and the objective lens, so that the load on the objective lens is reduced, The objective lens and the objective lens driving mechanism can be protected.

[Brief description of the drawings]

FIG. 1 is a plan view showing a state in which a tray of an optical disk device according to an embodiment of the present invention is displaced to a storage position.

FIG. 2 is a plan view showing a state in which the tray is displaced to the open position in the embodiment of the optical disc apparatus according to the present invention.

FIG. 3 is a rear cross-sectional view for explaining the configuration of a cleaner member 5 portion which is a main component of the present invention.

FIG. 4 is a plan view for explaining the operation of the cleaner member 5.

[Explanation of symbols]

 1 Chassis 2 Turntable 3 Optical Head 4 Tray 5 Cleaner Member 7 Leaf Spring 9 Objective Lens 10 Cleaning Section

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuo Imai 2-5-5 Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd.

Claims (5)

[Claims] 1. A chassis having an optical head for optically tracing a disk mounted on a turntable for rotating the disk, and a disk storage section for storing the disk, the disk storage section comprising: A tray that is slidably displaceable with respect to the chassis between a storage position in which the chassis is housed and the disk storage portion is open to the outside of the chassis; The cleaner includes a cleaning unit for cleaning the objective lens of the head, and a cleaner member supported by the tray so that the cleaning unit is displaced to a position facing the objective lens due to sliding displacement of the tray. The member is displaceably supported with respect to the tray, and by displacing the tray to the storage position when the cleaner member is displaced in the displacement direction of the tray to the storage position. An optical disk device, characterized in that the cleaner member is brought into contact with an abutment wall formed inside an equipment housing to return the cleaner member to a predetermined position where the cleaning of the objective lens is performed. 2. A turntable is fixed to the chassis, and the cleaner member is brought into contact with the turntable when the tray is displaced to the open position and displaced in the displacement direction of the tray to the storage position. The optical disk device according to claim 1, wherein the optical disk device is supported so as to be displaceable with respect to the tray. 3. The optical disk device according to claim 1, wherein the contact wall is formed on the chassis. 4. The optical disk device according to claim 1, wherein the contact wall is an inner wall of an equipment housing. 5. The cleaning unit is configured to clean the objective lens by slidingly contacting the surface of the objective lens, and can be displaced with respect to the tray in order to weaken a frictional force generated at the sliding contact. The optical disk device according to claim 1, which is supported by the optical disk device.