JP2001014709A - Optical disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical disk device capable of removing to the utmost unstable elements relating to the structure of preventing stains of the objective lens in an optical pickup. SOLUTION: This optical disk device is equipped with a turntable 3 rotatably driven by a spindle motor 2, a feeding mechanism 10 supported freely movably in the radius direction of an optical disk to be placed on the turntable 3, and an optical pickup 15 that reciprocates between the inner and the outer circumferences of the optical disk in accordance with the movement of the feeding mechanism 10. In addition, the device is provided with a shutter 17 which is disposed on the chassis that becomes a fixed part near the turntable 3 and which is designed to be freely movable between a closed position for covering the objective lens 16 of the optical pickup 15 and an open position for exposing the objective lens 16, in accordance with the reciprocating movement of the optical pickup 15.

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 such as a CD player, and more particularly to a technique for preventing an objective lens of an optical pickup of an optical disk device from being stained.

[0002]

2. Description of the Related Art In an optical disk device such as a CD player, dust or tobacco in the air adheres to an objective lens of an optical pickup during use for a long time, and the optical characteristics thereof deteriorate. Or reproduction of the optical disc may not be possible. As a conventional technique for preventing the contamination of the objective lens of such an optical pickup, there is a technique disclosed in, for example, Japanese Patent Application Laid-Open No. 10-49895. This prior art has a shutter that is mounted on a pickup feed mechanism and that opens and closes between a closed position that covers the objective lens and an open position that exposes the objective lens in conjunction with the movement of the feed mechanism. .

FIG. 12 is an exploded perspective view of a main part of a conventional optical disk device. In FIG. 12, the optical disc device includes a turntable 3 that is driven to rotate by a spindle motor 2 fixed to the chassis 1 and a chassis 1 that is movable in the radial direction of an optical disc (not shown) mounted on the turntable 3. Feed mechanism 10 supported in opening 4
And an optical pickup 15 attached to the feed mechanism 10 and reciprocating between the inner circumference and the outer circumference of the optical disk with the movement of the feed mechanism 10.

The feed mechanism 10 is guided by a feed shaft 5 inserted into a hole 11 and driven by a driving force from a feed motor 6 transmitted through a drive transmission mechanism 7 composed of a combination of gears. Is done. That is, the rack gear 12 attached to the feed mechanism 10 meshes with a pinion gear (not shown in FIG. 12 because it is located below the gear 8) attached to the shaft of the gear 8 included in the drive transmission mechanism 7. Thereby, the rotational driving force from the feed motor 6 is converted into a linear driving force by the rack gear 12 and transmitted to the feed mechanism 10.

The shutter 17 has a mounting shaft 18 rotatably supported by a mounting hole 13 of the feed mechanism 10, and a spring 20 mounted between a hook 14 provided on the feed mechanism 10 and the shutter 17. Thus, the actuator is always urged in the opening direction (the direction of arrow A).

Accordingly, the shutter 17 is in the open position during normal use of the optical disc apparatus (during recording or reproduction of the optical disc), and does not block the objective lens 16 of the optical pickup 15.

When the optical disk device is not used (when stopped or when the power is turned off), the feed mechanism 10 is moved in the inner circumferential direction of the optical disk (that is, in the direction approaching the turntable 3). At this time, the boss 19 formed on the shutter 17 contacts the wall 9 erected on the chassis 1 by moving the feed mechanism 10 further than the innermost recording surface of the optical disc. As a result, the shutter 17
The objective lens 16 of the optical pickup 15 rotates in the closing direction (the direction of arrow B) against the urging force of the spring 20.
Cover up.

[0008]

However, the above-described structure has some structural instability factors as described below. That is, the optical pickup 15
The distance between the objective lens 16 and the optical disk is about 1.6 mm, and the above-described shutter 17 must be provided in this small gap. Therefore, it is necessary to make the thickness of the shutter 17 as thin as possible.
mm.

Further, according to the specifications of the optical disk device, the turntable 3 on which the optical disk is mounted has a mechanical dimensional tolerance of 0.35 mm in height, and the turntable 3 itself has a surface runout. . Also, the optical disc has a surface runout of 0.6 to 0.7 mm in specifications. The surface runout of the optical disk is particularly remarkable in the outer peripheral portion compared to the inner peripheral portion.

Due to such instability factors, it is difficult to maintain the accuracy when the shutter 17 is arranged between the objective lens 16 of the optical pickup 15 and the optical disk.

In the above-described conventional structure, the optical pickup 1
When 5 reciprocates on the inner and outer circumferences of the optical disc, the shutter 17 is always located below the optical disc. Therefore, particularly when recording / reproducing the outer peripheral portion of the optical disc,
Inconveniences such as the shutter 17 coming into contact with the recording surface of the optical disk are expected, and the accuracy and maintenance of parts are required.
There are problems such as deterioration in the yield of parts supply. If the mounting accuracy of the shutter 17 is poor, the shutter 17 may come into contact with the objective lens 16 when moving to the closed position. Furthermore, when it is desired to replace only the optical pickup 15 with a component, the above-described structure requires replacement including the shutter 17, and there is a problem that extra work of removing and attaching the shutter 17 is required.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an optical disk apparatus which solves the above-mentioned conventional problems and which can eliminate as much as possible an unstable factor relating to a structure for preventing the objective lens of an optical pickup from being stained. is there.

[0013]

SUMMARY OF THE INVENTION In view of the above-mentioned object, an optical disk apparatus according to the present invention comprises a turntable that is driven to rotate by a spindle motor, and an optical disk mounted on the turntable that is movable in a radial direction. An optical disc device comprising a supported feed mechanism, and an optical pickup attached to the feed mechanism and reciprocating between an inner circumference and an outer circumference of the optical disc in response to movement of the feed mechanism, wherein the optical pickup is fixed near a turntable. A shutter which is movable between a closed position for covering the objective lens of the optical pickup and an open position for exposing the objective lens in accordance with the reciprocating movement of the optical pickup.

Accordingly, the shutter for preventing the objective lens of the optical pickup from being stained is provided only when the optical pickup is moved to the vicinity of the turntable, that is, to the inner peripheral side of the optical disc mounted on the turntable.
Move between open and closed positions. Therefore, the influence of the mechanical accuracy (surface deflection, warpage) of the optical disk can be almost ignored. As a result, it is expected that a margin in design can be improved, and accordingly, the management and maintenance of parts, the yield, and the quality can be improved. In addition, since the movable position of the shutter is always fixed, the margin of design can be similarly improved in the peripheral mechanism for transporting the optical disk.

According to another aspect of the present invention, there is provided an optical disk apparatus comprising: a turntable rotatably driven by a spindle motor; a feed mechanism movably supported in a radial direction of an optical disk mounted on the turntable; An optical pickup mounted on the optical disc and reciprocating between an inner circumference and an outer circumference of the optical disc in response to movement of the feed mechanism, wherein the optical pickup is disposed on a fixed portion near the turntable, The optical pickup has a shutter movable between a closed position for covering the objective lens of the optical pickup and an open position for exposing the objective lens. The shutter is provided when the optical pickup is located on the inner peripheral side of the optical disc. , A part of which comes into contact with a part of the feed mechanism to cover and hide the objective lens,
When the optical pickup is located on the outer peripheral side of the optical disk, a part of the optical pickup is separated from a part of the feed mechanism, so that the open position exposes the objective lens.

Accordingly, the shutter for preventing the objective lens of the optical pickup from being stained is provided only when the optical pickup is moved near the turntable, that is, when the optical pickup is moved to the inner peripheral side of the optical disc mounted on the turntable.
A part moves between the open position and the closed position by abutting or separating from a part of the feed mechanism. Therefore, the influence of the mechanical accuracy (surface deflection, warpage) of the optical disk can be almost ignored. As a result, it is expected that a margin in design can be improved, and accordingly, the management and maintenance of parts, the yield, and the quality can be improved. In addition, since the movable position of the shutter is always fixed, the margin of design can be similarly improved in the peripheral mechanism for transporting the optical disk.

An optical disk device according to another aspect of the present invention provides a turntable that is driven to rotate by a spindle motor, and is supported movably in a radial direction of an optical disk mounted on the turntable. An optical disc device having a feed mechanism driven through the optical disc and an optical pickup attached to the feed mechanism and reciprocating between an inner circumference and an outer circumference of the optical disc in response to movement of the feed mechanism, wherein And a blocking wall for blocking between the objective lens of the optical pickup and the drive transmission mechanism.

Accordingly, dust, grease, and the like from the drive transmission mechanism 7 toward the objective lens 16 are blocked, and the objective lens can be prevented from being stained.

An optical disk apparatus according to another aspect of the present invention has a turntable that is driven to rotate by a spindle motor, and is supported so as to be movable in a radial direction of an optical disk mounted on the turntable. An optical disc device having a feed mechanism driven through the optical disc and an optical pickup attached to the feed mechanism and reciprocating between an inner circumference and an outer circumference of the optical disc in response to movement of the feed mechanism, wherein And a blocking wall that blocks between the objective lens of the optical pickup and the drive transmission mechanism, and a blocking wall that is disposed on the fixed portion near the turntable, and the objective of the optical pickup is moved according to the reciprocating motion of the optical pickup. There is provided a shutter movable between a closed position for covering and hiding the lens and an open position for exposing the objective lens.

Accordingly, the shutter for preventing the objective lens of the optical pickup from being stained is provided only when the optical pickup is moved to the vicinity of the turntable, that is, to the inner peripheral side of the optical disk mounted on the turntable.
Move between open and closed positions. Therefore, the influence of the mechanical accuracy (surface deflection, warpage) of the optical disk can be almost ignored. As a result, it is expected that a margin in design can be improved, and accordingly, the management and maintenance of parts, the yield, and the quality can be improved. In addition, since the movable position of the shutter is always fixed, the margin of design can be similarly improved in the peripheral mechanism for transporting the optical disk.

Further, dust and grease flying from the drive transmission mechanism toward the objective lens are blocked by the blocking wall, thereby preventing the objective lens from becoming dirty.

According to another aspect of the present invention, in addition to the optical disc apparatus of the above-described aspect, the shutter is constantly biased in the closing direction or the opening direction by elastic means.

Thus, the shutter can be reliably returned to the closed position or the open position by the urging force of the elastic means.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an optical disk device according to the present invention will be described below with reference to FIGS. FIG. 1 is an exploded perspective view of a main part of an optical disk device according to the present invention, FIG. 2 is a plan view, and FIG. 3 is a rear view. 4 and 5 are a front perspective view and a rear perspective view, respectively, of the chassis in the optical disk device of FIG. FIG.
FIG. 2 is a perspective view of a feed shaft in the optical disc device of FIG. 1.
7 and 8 are a front perspective view and a rear perspective view, respectively, of the shutter in the optical disk device of FIG. In each figure, the same components as those in the conventional example shown in FIG.

Referring to FIG. 1, the optical disc apparatus has a spindle motor 2, a turntable 3, a feed motor 6, a feed mechanism 10, and an optical pickup 15 mounted on a chassis 1 serving as a fixed portion.

The chassis 1 is an integrally molded product using a material such as ABS resin. As shown in FIGS.
Opening 4 for movably mounting feed mechanism 10
And a cylindrical mounting portion 31 for fitting and fixing the spindle motor 2, a mounting portion 32 for mounting the feed motor 6, and a mounting portion 3 for mounting the drive transmission mechanism 7.
3 are formed. In the chassis 1, a perforated boss 23, a blocking wall 24,
A hook 26 is integrally formed with a shutter piece supporting portion 25 connected to the blocking wall 24. Shutter support 2
The height of 5 is just the shutter piece 2 of the shutter 17.
Reference numeral 2 is set to a size that can slide on it and does not collide with the objective lens 16 from the lateral direction.

The feed mechanism 10 includes two holes 11 for inserting the feed shaft 5 (see FIG. 6) attached to one side of the opening 4 of the chassis 1, a support groove 27, and an arc-shaped notch 28. , A projection 29 is formed. The arc-shaped notch 28 is formed on the side surface facing the turntable 3, and the curvature of the arc matches the curvature of the outer shape of the cylindrical mounting portion 31 of the chassis 1. In addition, the feed mechanism 10 includes
An optical pickup 15 and a rack gear 12 are mounted.

The feed mechanism 10 is guided by the feed shaft 5 inserted into the hole 11, and a support groove 27 (see FIG. 3) formed on the opposite side of the hole 11 It is slidably supported by the rail 30 which is one side. Further, the feed mechanism 10 is configured such that the driving force from the feed motor 6 is controlled by a drive transmission mechanism 7 composed of a combination of gears.
Is driven by the transmission through the. That is,
A rack gear 12 attached to the feed mechanism 10 meshes with a pinion gear (not shown in FIG. 1 because it is below the gear 8) attached to the shaft of the gear 8 included in the drive transmission mechanism 7. Thereby, the rotational driving force from the feed motor 6 is converted into a linear driving force by the rack gear 12 and transmitted to the feed mechanism 10.

The shutter 17 is an integrally molded product made of resin and has, for example, a shape shown in FIGS. 7 and 8, and includes a mounting shaft 18, a boss 19, a locking groove 21, and a shutter piece 2.
2 is provided. The distance between the mounting shaft 18 and the boss 19 is set shorter than the distance between the mounting shaft 18 and the tip of the shutter piece 22. The shutter piece 22 has a thickness of 0.3 mm.
It is formed as thin as possible. The shutter 17 has a mounting shaft 18 inserted into a perforated boss 23 of the chassis 1 and is rotatably supported. Further, the shutter 17 is constantly urged in the opening direction (direction of arrow A) by a spring 20 as an elastic means attached between a hook 26 provided on the chassis 1 and the locking groove 21 of the shutter 17. .

Next, the operation of the optical disk device having the above-described structure and the operation of the shutter 17 associated therewith will be described.

In the optical disk device, when a recording or reproducing operation of the optical disk is instructed, the spindle motor 2 is started and rotated, and the turntable 3 is driven to rotate, and accordingly, the optical disk mounted on the turntable 3 also rotates. I do.

At the same time, the feed motor 6 also starts and rotates, and drives the feed mechanism 10 via the drive transmission mechanism 7 and the rack gear 12. The feed mechanism 10 reciprocates between the inner circumference and the outer circumference of the optical disk.
The optical pickup 15 mounted on the optical disc also records a signal on the optical disc or reads a signal from the optical disc while reciprocating between the inner circumference and the outer circumference of the optical disc.

Next, when the stop of the optical disk device is instructed, the feed mechanism 10 and the optical pickup 15 move in the inner circumferential direction of the optical disk (that is, the direction approaching the turntable 3). At this time, the optical pickup 15
When the disk reaches the innermost recording surface of the optical disk, the feed mechanism 1
0 contacts a limit switch (not shown) attached to the rear side of the chassis to operate the limit switch. Then, based on the signal from the limit switch,
The rotation of the spindle motor 2 is stopped, and the recording or reproducing operation of the optical disk ends.

At this time, even if the limit switch operates, the feed motor continues to drive a little more. Therefore, the feed mechanism 10 moves so as to be closer to the turntable 3 than the innermost recording surface of the optical disc. In addition,
The further movement of the feed mechanism 10 may use the inertial operation of the feed motor 6.

That is, since the side surface of the feed mechanism 10 facing the turntable 3 is an arc-shaped notch 28, the feed mechanism 10 does not collide with the cylindrical mounting portion 31 of the chassis 1, and It can be moved so as to be closer to the turntable 3 than the innermost recording surface. By this further movement, the boss 19 formed on the shutter 17 is moved to the protrusion 29 formed on the feed mechanism 10.
Abut. As a result, the shutter 17 rotates in the closing direction (the direction of arrow B) against the urging force of the spring 20, and the shutter piece 22 is brought to the closed position where the shutter piece 22 covers the objective lens 16 of the optical pickup 15 (FIG. 2). Solid line position).
When the shutter piece 22 reaches the closed position, the feed mechanism 1
0 stops completely. This stop may be executed by the feed mechanism 10 abutting on the chassis 1.

As described above, since the distance between the mounting shaft 18 of the shutter 17 and the boss 19 is set shorter than the distance between the mounting shaft 18 and the tip of the shutter piece 22, the boss 19 is Shutter piece 2 that occurs when touched
The two pivoting movements are amplified several times in stroke (for example, about six times in this embodiment) with respect to the further movement distance of the feed mechanism 10. Therefore, the feed mechanism 10
However, even if the shutter piece 22 is moved a small distance in the direction closer to the turntable 3 than the innermost recording surface of the optical disc, for example, only 2 mm, the rotation distance of the shutter piece 22 becomes
12 millimeters. As a result, the shutter piece 22
Can reliably move from the open position to the closed position.

As described above, when the optical disc apparatus is in a stopped state (including when the power is off), the objective lens 16 of the optical pickup 15 is covered and covered by the shutter 17, so that contamination by dust and the like is prevented. be able to.

When the feed mechanism 10 and the optical pickup 15 are located between the vicinity of the inner circumference of the optical disk and the closed position of the shutter 17, the feed mechanism 10 and the optical pickup 15 are cut off from the drive transmission mechanism 7 by the cut-off wall 24 of the chassis 1. Therefore,
Dust and the like going from the drive transmission mechanism 7 toward the objective lens 16 are blocked by the blocking wall 24.

When the gears (including the gear 8) constituting the drive transmission mechanism 7 are out of mesh with each other, the meshing portions may be greased. In this case, a grease flying phenomenon may occur in which grease flies around due to centrifugal force caused by high-speed rotation of some gears. Even when such a phenomenon occurs, the objective lens 16 is protected from grease splattering by the drive transmission mechanism 7 due to the presence of the blocking wall 24.

When the optical disc apparatus is instructed to perform recording or reproducing operation on the optical disc from the above-mentioned stopped state, as described above, the feed mechanism 10 and the optical pickup 15 move from the inner circumference to the outer circumference of the optical disc. And move. Along with this movement, the boss 19 formed on the shutter 17 separates from the projection 29 of the feed mechanism 10 that was in contact with the boss 19. As a result, the shutter 17 is
The shutter piece 22 is returned to the open position where the objective lens 16 of the optical pickup 15 is reliably exposed (the position indicated by the dotted line in FIG. 2). Therefore, the optical pickup 15 can perform recording or reproduction of the optical disc mounted on the turntable 3 without any trouble.

The shutter piece 22 of the shutter 17 is always supported on a shutter piece support portion 25 formed on the chassis 1 regardless of whether the shutter 17 is in the open position or the closed position. Therefore, even if a dimensional error in the height direction occurs when the mounting shaft 18 of the shutter 17 is mounted on the perforated boss 23, the shutter piece 22 can be mounted on the objective lens 16.
Never fall below the height of Therefore, when the shutter 17 moves to the closed position, the shutter piece 22 does not collide with the objective lens 16 from the lateral direction.

Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications and applications are possible. For example, the spring 20 may be mounted such that the urging force acts in the opposite manner to the above-described embodiment. That is, the shutter 17 is mounted so as to be constantly biased by the spring 20 in the closing direction (direction of arrow B), and the shutter 17 is turned in the opening direction (direction of arrow A) against the biasing force of the spring 20. It may be configured to move.

In the above embodiment, the shutter 17 is opened and closed by the urging force of the spring 20 and the contact between the boss 19 formed on the shutter 17 and the projection 29 formed on the feed mechanism 10. And based on
Alternatively, a structure as shown in FIG. 9 can be used. That is, a guide groove 34 having a linear portion formed parallel to the rack gear 12 on the inner peripheral side of the optical disk and a curved portion curved toward the optical pip-up 15 on the outer peripheral side is formed in the feed mechanism 10. And the perforated boss 2
The boss 19 of the shutter 17 mounted by inserting the mounting shaft 18 into the guide groove 3 is loosely fitted in the guide groove 34.

In this structure, when the feed mechanism 10 is located on the outer peripheral side of the optical disk, the boss 19 of the shutter 17
Is located in the linear portion of the guide groove 34, the shutter piece 22 is in the open position to expose the objective lens 16. On the other hand, when the feed mechanism 10 moves from the outer circumference to the inner circumference of the optical disc, the boss 19 of the shutter 17 enters the curved portion from the straight portion of the guide groove 34, and the shutter piece 22 rotates from the open position to the closed position. Move the objective lens 16
Will be obscured.

As another embodiment, the shutter 17
Instead of the opening and closing operation by the rotation described above, the opening and closing operation of moving horizontally and linearly using the structure shown in FIGS. 10 and 11 may be used. That is, the feed mechanism 10
And a cam 3 having a substantially trapezoidal shape on the outer peripheral side of the optical disc.
5 is formed. Then, the shutter 17 having the boss 19, the shutter piece 22, and the elongated hole 36 is attached to the chassis 1 near the turntable 3 so as to be movable in the lateral direction (that is, in the direction perpendicular to the moving direction of the feed mechanism 10). The long hole 36 of the shutter 17 has a length necessary to reciprocate the shutter piece 22 between the open position and the closed position. The shutter 17 is mounted by screwing a screw 37 into the chassis 1 through the elongated hole 36, and can move linearly horizontally between the open position and the closed position. A spring 20 is connected between an end of the shutter 17 opposite to the shutter piece 22 and an appropriate position of the chassis 1, and the shutter 17 is constantly urged in the opening direction by the urging force. The boss 19 is arranged so as to be on the movement locus of the cam 35 when the feed mechanism 10 moves from the outer circumference to the inner circumference of the optical disk when the shutter 17 is at the open position.

In this structure, when the feed mechanism 10 is located on the outer peripheral side of the optical disk, as shown in FIG.
The boss 19 of the shutter 17 does not contact the cam 35 provided with the feed mechanism 10, and the shutter 17
The spring 20 is in the open position by the urging force. Therefore, the shutter piece 22 does not block the objective lens 16, and the objective lens 16 is exposed.

On the other hand, as shown in FIG. 11B, when the feed mechanism 10 moves from the outer circumference to the inner circumference of the optical disk,
The cam 35 that moves with it collides with the boss 19 of the shutter 17. Next, when the feed mechanism 10 further moves in the inner circumferential direction, the boss 19 of the shutter 17 slides along the trapezoidal slope of the cam 35, and the shutter piece 22 correspondingly moves in the closing direction (FIG. 11B). Move to the left) in). Next, the boss 19 of the shutter 17 rides on the trapezoidal upper portion of the cam 35, at which point the shutter 17 stops moving in the lateral direction, and the shutter piece 22 is in the closed position to cover the objective lens 16. become.

In the above-described embodiments and examples,
Although the shutter 17 and the blocking wall 24 are arranged directly on the chassis 1, the shutter 17 and the blocking wall 24 may be arranged via other fixing means, or may be arranged on a fixed portion other than the chassis 1, for example, on a chassis on the disk device body side. May be.

[0049]

According to the optical disk device of the present invention,
A shutter for preventing contamination of the objective lens of the optical pickup can be provided near the inner periphery, and the effect of the mechanical accuracy (surface deflection, warpage) of the optical disk can be almost ignored. As a result, it is expected that a margin in design can be improved, and accordingly, the management and maintenance of parts, the yield, and the quality can be improved. In addition, since the movable position of the shutter is always fixed, the margin of design can be similarly improved in the peripheral mechanism for transporting the optical disk.

According to another aspect of the present invention, a blocking wall is provided between the drive transmission mechanism for transmitting the driving force of the feed motor to the feed mechanism and the optical pickup, so that dust from the drive transmission mechanism toward the objective lens is provided. It is possible to prevent the objective lens from being stained by blocking the grease and flying grease.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part of an optical disk device according to the present invention.

FIG. 2 is a plan view of a main part of the optical disk device of FIG.

FIG. 3 is a rear view of a main part of the optical disk device of FIG. 1;

FIG. 4 is a front perspective view of a chassis in the optical disk device of FIG. 1;

FIG. 5 is a rear perspective view of a chassis in the optical disc device of FIG. 1;

FIG. 6 is a perspective view of a feed shaft in the optical disk device of FIG. 1;

FIG. 7 is a front perspective view of a shutter in the optical disk device of FIG. 1;

FIG. 8 is a rear perspective view of a shutter in the optical disk device of FIG. 1;

FIG. 9 is a partial perspective view showing another embodiment of the optical disc apparatus of the present invention.

FIG. 10 is a partial perspective view showing still another embodiment of the optical disc apparatus of the present invention.

11A and 11B are schematic diagrams illustrating opening and closing operations of a shutter of the optical disc device in FIG. 10, wherein FIG.
(B) shows a closed position state.

FIG. 12 is an exploded perspective view of a main part of a conventional optical disk device.

[Explanation of symbols]

 Reference Signs List 1 chassis 2 spindle motor 3 turntable 6 feed motor 7 drive transmission mechanism 15 optical pickup 16 objective lens 17 shutter 19 boss (part of shutter) 20 spring (elastic means) 24 blocking wall 29 protrusion (part of feed mechanism)

Continued on the front page (72) Inventor Shingo Omata 1-21-5 Ogawa Higashi, Akiruno-shi, Tokyo F-term in Kenwood Precision Co., Ltd. 5D119 AA32 BA01 MA16

Claims (5)

[Claims] 1. A turntable rotatably driven by a spindle motor, a feed mechanism movably supported in a radial direction of an optical disc mounted on the turntable, and movement of the feed mechanism attached to the feed mechanism. An optical disc device having an optical pickup that reciprocates between an inner circumference and an outer circumference of the optical disc in accordance with the optical pickup, wherein the optical pickup is disposed on a fixed portion near the turntable, and the optical pickup is reciprocated in accordance with the reciprocation of the optical pickup. An optical disc device comprising a shutter movable between a closed position for covering and covering an objective lens of a pickup and an open position for exposing the objective lens. 2. A turntable rotatably driven by a spindle motor, a feed mechanism movably supported in a radial direction of an optical disc mounted on the turntable, and a movement of the feed mechanism attached to the feed mechanism. An optical disc device having an optical pickup that reciprocates between an inner circumference and an outer circumference of the optical disc in accordance with the optical pickup, wherein the optical pickup is disposed on a fixed portion near the turntable, and the optical pickup is reciprocated in accordance with the reciprocation of the optical pickup. A shutter movable between a closed position for covering the objective lens of the pickup and an open position for exposing the objective lens is provided.When the optical pickup is located on the inner peripheral side of the optical disc, A part thereof comes into contact with a part of the feed mechanism so as to be in a closed position for covering and hiding the objective lens, and When-up is positioned on the outer peripheral side of the optical disk, an optical disk device, a part is characterized by comprising an open position exposing the objective lens by separating a part of the feeding mechanism. 3. A turntable rotatably driven by a spindle motor, and a feed mechanism movably supported in a radial direction of an optical disc mounted on the turntable and driven by a feed motor via a drive transmission mechanism. An optical pickup attached to the feed mechanism and reciprocating between an inner circumference and an outer circumference of the optical disk in response to movement of the feed mechanism, wherein the optical pickup is disposed on a fixed portion near the turntable. An optical disc device comprising a blocking wall for blocking between the objective lens of the optical pickup and the drive transmission mechanism. 4. A turntable rotatably driven by a spindle motor, and a feed mechanism movably supported in a radial direction of an optical disc mounted on the turntable and driven by a feed motor via a drive transmission mechanism. An optical pickup attached to the feed mechanism and reciprocating between an inner circumference and an outer circumference of the optical disk in response to movement of the feed mechanism, wherein the optical pickup is disposed on a fixed portion near the turntable. A blocking wall for blocking between the objective lens of the optical pickup and the drive transmission mechanism; and an objective lens of the optical pickup disposed on the fixed portion near the turntable in accordance with reciprocation of the optical pickup. A shutter movable between a closed position for covering the image and an open position for exposing the objective lens. Optical disk device that. 5. The optical disk device according to claim 1, wherein the shutter is always urged in a closing direction or an opening direction by an elastic means.