JPH08263908A - Optical disk reproducing device - Google Patents

Abstract

PURPOSE: To secure stable rotating operation of an optical disk by stopping a clamp auxiliary means in a position apart from the optical disk after clamping the optical disk by a clamp means. CONSTITUTION: When the optical disk 2 is inserted into the optical disk reproducing device, a pinion 11 is turned clockwise. Consequently, a 1st rack 10a is moved upward, and a 2nd rack 10b is moved downward. As a result, a 1st optical system 7a, a spindle motor 3, the clamp means 4 and an optical disk sucking means 5 are also moved upward, and a 2nd optical system 7b, the clamp auxiliary means 6 are also moved downward, and then the optical disk 2 is surely clamped by the clamp means 4. The optical disk 2 is prevented from falling down by the clamp auxiliary means 6, and by pressing a hub 8, the optical disk 2 is surely clamped by the clamp means 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk reproducing device.

[0002]

2. Description of the Related Art FIG. 4 (a) is a vertical sectional view showing a state before an optical disc is inserted into the optical disc reproducing device and clamped in the conventional optical disc reproducing device. FIG. 4B is a vertical sectional view showing a state where the optical disc is inserted into the optical disc reproducing device and clamped by the clamping means in the conventional optical disc reproducing device.

Inside the optical disk reproducing apparatus 1, a clamping means 4 for clamping the optical disk 2, an optical disk adsorbing means 5 for adsorbing the optical disk 2 to the clamping means 4, and an optical disk 2 are surely attached to the clamping means 4. There is a spindle motor 3 for rotating the optical disc 2 after the clamp assisting means 6 and the optical disc 2 are attached to the clamping means 4.

The clamp assisting means 6 was always in close contact with the hub 8 while the optical disk 2 was rotating, and continued to give a force to press the clamp means 4.

[0005]

In the prior art as described above, since the clamp assisting means also rotates in accordance with the rotation of the spindle motor, the rotation center of the spindle motor and the rotation center of the clamp assisting means are always aligned with each other. I had to. If the rotation center of the spindle motor and the rotation center of the clamp assisting means do not match,
Unnecessary force is applied to the optical disc rotating at high speed, and there is a fear that data may not be reproduced correctly.

An object of the present invention is to ensure a stable rotation operation of an optical disc so that the optical disc can always be reproduced correctly.

[0007]

In order to solve the above problems, the present invention provides a clamp means for clamping an optical disc, a rotating means for rotating the optical disc, and a reliable attachment of the optical disc to the clamp means. For moving the clamp means and the rotating means, and a second moving means for moving the clamp assisting means, wherein the clamp assisting means comprises: After the optical disc is clamped by the clamping means, the optical disc is stopped at a position away from the optical disc.

[0008]

In the present invention, the clamp assisting means guides the optical disk within the range where the suction force of the optical disk suction means provided in the vicinity of the clamp means works, so that the optical disk can be securely attached to the clamp means. . Further, while the optical disc is rotating, the optical disc and the clamp assisting means are apart from each other, so that the clamp assisting means has no influence on the rotation of the optical disc. Therefore, the optical disc is not scraped due to the abrasion generated between the optical disc and the clamp assisting means.

[0009]

[Embodiment 1] FIG. 1A is a vertical cross-sectional view of an optical disk reproducing apparatus having a double-sided access structure in which two optical heads are arranged according to this embodiment, when an optical disk is inserted into the apparatus. It is shown. FIG. 1B is a vertical cross-sectional view showing a state of recording / reproducing an optical disc in an optical disc reproducing device having a double-sided access structure in which two optical heads are arranged according to the present embodiment. .

The optical disc reproducing apparatus 1 has a first optical system 7a and a second optical system 7b for recording / reproducing information on the optical disc 2, a clamping means 4 for clamping the optical disc 2, and an optical disc 2 for adsorbing on the clamping means 4. The optical disk suction means 5 and the optical disk 2 are clamp means 4
Clamp assist means 6 for surely attaching the optical disc 2 to the clamp means 4, the spindle motor 3 for rotating the optical disc 2 after the optical disc 2 is attached to the clamp means 4, the first optical system 7a and the second optical system 7b. Guide rod 9 for smoothly approaching the optical disc 2 and the first optical system 7a
And a first rack 10a and a second rack 10b, which are moving means for moving the second optical system 7b to the optical disc, and a first rack 10a and a second rack 10b.
It is composed of a pinion 11 which is a driving means for driving the.

The optical disk is inserted into the inside of the optical disk reproducing apparatus through the insertion opening. The pinion 11, which is the driving means of the first optical system 7a and the second optical system 7b, starts rotating clockwise. Then, the first rack 10a is shown in FIG.
In (a), it moves upward. By this, the first
The first optical system 7a that moves in synchronization with the rack 10a of
The spindle motor 3, the clamp means 4, and the optical disk suction means 5 also move upward in FIG. Second
Rack 10b moves downward in FIG. 1 (a). As a result, the second optical system 7b and the clamp assisting means 6 which move in synchronization with the second rack 10b are also shown in FIG.
It moves downward in (a). As a result, both the first optical system 7a and the second optical system 7b approach the position where recording / reproduction is possible on the inserted optical disc 2.

On the other hand, the spindle motor 3, the clamp means 4, the optical disk suction means 5, and the clamp auxiliary means 6 also approach the optical disk 2. The playback surface of the optical disc 2 is
When the optical disk reproducing device 1 is installed so as to be horizontal with respect to the floor surface, when the optical disk adsorbing means 5 approaches the position where the adsorbing force of the optical disk adsorbing means 5 reaches the hub 8, it is eventually clamped. It is securely clamped by means 4. When the optical disk reproducing apparatus 1 is installed so that the reproduction surface of the optical disk 2 is perpendicular to the floor surface, the optical disk adsorption means 5 approaches the position where the adsorption force of the optical disk adsorption means 5 reaches the hub 8. Until then, the clamp assisting means 6 prevents the optical disc 2 from falling.
The clamp assisting means 6 ensures that the optical disk 2 is clamped by the clamp means 4 by pushing the hub 8.

To end the recording / reproducing, the pinion 1
1 starts rotating counterclockwise. Then, the first rack 10a moves downward in FIG. 1 (a). This allows the first rack 10a to move in synchronization with the first rack 10a.
Optical system 7a, spindle motor 3, clamp means 4,
Also, the optical disk suction means 5 can be moved downward in FIG. 1A and separated from the optical disk 2. On the other hand, the second rack 10b moves upward in FIG. As a result, the second optical system 7b and the clamp assisting means 6 that move in synchronization with the second rack 10b.
Can move upward in FIG. 1 (a) and separate from the optical disc. At this time, that is, the first optical system 7
When a and the second optical system 7b are separated from the optical disc 2, the optical disc 2 is taken out from the optical disc reproducing apparatus 1.

[0014]

[Embodiment 2] FIG. 2A is a vertical sectional view of an optical disk reproducing apparatus having a double-sided access structure in which two optical heads are arranged according to this embodiment, when an optical disk is inserted into the apparatus. It is shown. FIG. 2B is a vertical cross-sectional view showing a state in which the optical disc is recorded and reproduced in the optical disc reproducing device having the double-sided access structure in which two optical heads are arranged according to the present embodiment. .

This embodiment is different from the first embodiment in that the first optical system 7a, the second optical system 7b, the spindle motor 3, the clamp means 4, the optical disk suction means 5 and the clamp assisting means 6 up to the optical disk 2. Transportation means for moving,
And only the drive means. The moving means and the driving means in this embodiment will be described below. A roller 25 which is a driving means for the first optical system 7a and the second optical system 7b.
Starts rotating clockwise. Then, the roller 26 rotates counterclockwise. Since the pin 27 is fixedly attached to the roller 26, when the roller 26 rotates counterclockwise, the pin 27 also rotates counterclockwise. At this time, the notch 28 provided at the end of the base of the first optical system 7a receives an upward force in FIG. By this upward force, the first optical system 7a also rises, and the optical disc 2 can be brought closer to a position where recording / reproduction is possible.
On the other hand, when the roller 25 starts rotating clockwise, the roller 24 in contact with the roller 25 rotates counterclockwise.
When the roller 24 rotates counterclockwise, the roller 23 in contact with it rotates clockwise. Since the pin 22 is fixedly attached to the roller 23, the roller 2
When 3 rotates clockwise, pin 22 also rotates clockwise. At this time, the notch 21 provided at the end of the base of the second optical system 7b receives a downward force in FIG. Due to this downward force, the second optical system 7b also descends, and the optical disc 2 can be approached to a position where recording and reproduction are possible. It should be noted that the roller 26 and the roller 23 can start rotating at the same time when the roller 25 rotates.

When the recording / reproduction is ended, the roller 25
Starts rotating counterclockwise. Then, the roller 26
Starts rotating clockwise. At this time, the notch 28 provided at the end of the base of the first optical system 7a is
Receives a downward force at. By this downward force, the first optical system 7a also descends and can be separated from the optical disc 2. On the other hand, the roller 24 rotates clockwise, and the roller 23 starts rotating counterclockwise. At this time, the notch 21 provided at the end of the base of the second optical system 7b receives an upward force in FIG. By this upward force, the second optical system 7b also rises and can be separated from the optical disc 2. At this time, that is, the first
When the optical system 7a and the second optical system 7b are separated from the optical disc 2, the optical disc 2 is taken out from the optical disc reproducing apparatus 1.

[0017]

[Embodiment 3] FIG. 3A is a vertical cross-sectional view of an optical disk reproducing apparatus having a double-sided access structure in which two optical heads are arranged according to this embodiment, when an optical disk is inserted into the apparatus. It is shown. FIG. 3B is a vertical sectional view showing a state in which the optical disc is recorded and reproduced in the optical disc reproducing apparatus having the double-sided access structure in which two optical heads are arranged according to the present embodiment. .

This embodiment is different from the first embodiment in the moving means and the driving means for moving the first optical system 7a and the second optical system 7b to the optical disk 2. The moving means and the driving means in this embodiment will be described below. The permanent magnet 3 is attached to the end of the base of the first optical system 7a.
3a and the permanent magnet 33b at the end of the base of the second optical system 7b are installed so that the upper side is the N pole and the lower side is the S pole. The permanent magnet 33a is installed near the lower side of the first coil 32a, and the permanent magnet 33b is installed near the upper side of the second coil 32b. First coil 32a
Also, the DC coil 31 is connected to the second coil 32b such that the first coil 32a side is the negative electrode and the second coil 32b side is the positive electrode, thereby forming a closed circuit. At this time, in the first coil 32a and the second coil 32b of FIG. 3, a magnetic field is generated such that the lower side is the N pole and the upper side is the S pole. Then, the N pole above the permanent magnet 33b and the second pole
The south poles of the upper side of the coil 32b attract each other.
Further, the S pole below the permanent magnet 33b and the N pole below the second coil 32b also attract each other. However, since the permanent magnet 33b is installed near the upper side of the second coil 32b, the force attracting the N pole above the permanent magnet 33b and the S pole above the second coil 32b is more permanent. It is larger than the attractive force between the south pole under the magnet 33b and the north pole under the second coil 32b. For this reason, the second power source 31 is an electromagnet.
The north pole above the permanent magnet 33b is attracted by the south pole of the coil 32b. The second optical system 7b that moves in synchronization with the permanent magnet 33b and the clamp assisting means 6
Also moves toward the south pole of the second coil 32b, that is, moves away from the optical disk 2.

The relationship between the permanent magnet 33a and the first coil 32a is similar to the relationship between the permanent magnet 33b and the second coil 32b described above, and the second coil 3 serving as an electromagnet.
The north pole of 2a attracts the south pole under the permanent magnet 33a. The first optical system 7a which moves in synchronization with the permanent magnet 33a, the spindle motor 3, the clamping means 4, and the optical disk attracting means 5 also include the first coil 32a.
To the N pole, that is, away from the optical disc 2.

As described above, the first coil 32a and the second coil 32a
If the direct current power supply 31 is connected to the coil 32b such that the first coil 32a side is the negative electrode and the second coil 32b side is the positive electrode, the first optical system 7a and the second optical system 7b are Move away from the optical disc 2. Next, for the first coil 32a and the second coil 32b, the first coil 3
The DC power supply 31 is connected so that the 2a side is the positive electrode and the second coil 32b side is the negative electrode to form a closed circuit. At this time, the first coil 32a and the second coil 32b of FIG.
At, a magnetic field is generated such that the lower side is the S pole and the upper side is the N pole. Then, the N pole above the permanent magnet 33b and the N pole above the second coil 32b repel each other. In addition, the S pole below the permanent magnet 33b and the second
The S poles under the coil 32b of the above also repel each other. However, since the permanent magnet 33b is installed near the upper side of the second coil 32b, the force by which the N pole above the permanent magnet 33b and the N pole above the second coil 32b repel each other is greater. , The S pole below the permanent magnet 33b and the S pole below the second coil 32b are greater than the repulsive force. Therefore, the N pole of the second coil 32b, which is an electromagnet by the DC power supply 31, pushes back the N pole above the permanent magnet 33b. Permanent magnet 3
The second optical system 7b and the clamp assisting means 6 that move in synchronization with 3b also move toward the S pole of the second coil 32b.
That is, the optical disk 2 is approached.

The relationship between the permanent magnet 33a and the first coil 32a is similar to the relationship between the permanent magnet 33b and the second coil 32b described above, and the second coil 3 serving as an electromagnet.
The S pole of 2a pushes back the S pole below the permanent magnet 33a. The first optical system 7a which moves in synchronization with the permanent magnet 33a, the spindle motor 3, the clamping means 4, and the optical disk attracting means 5 also include the first coil 32a.
To the N pole, that is, the optical disk 2 is approached.

As described above, the first coil 32a and the second coil 32a
If the DC power supply 31 is connected to the coil 32b such that the first coil 32a side is the positive electrode and the second coil 32b side is the negative electrode, the first optical system 7a, the spindle motor 3, and the clamping means 4 are connected. , The optical disk suction means 5, the second optical system 7b, and the clamp assisting means 6 are the optical disk 2
, And recording and playback are possible.

[0023]

As described above, according to the present invention, since the clamp assisting means 6 is separated from the optical disk 2 while the optical disk 2 is rotating, the clamp assisting means 6 has an influence on the rotation of the optical disk 2. There is nothing to give.
Therefore, since only the rotational force of the spindle motor 3 is not input to the optical disc 2, a stable rotation operation of the optical disc 2 can be ensured.

Furthermore, since it is not necessary to align the clamp assisting means 6 and the rotary shaft of the spindle motor 3 in a straight line,
The processing accuracy of the clamp assisting means 6 and the assembly accuracy of the optical disk reproducing apparatus can be relaxed, and a significant cost reduction can be achieved. Further, if the rotation axis of the clamp assisting means 6 and the rotation axis of the spindle motor 3 deviate from each other, unnecessary force is input to the optical disk 2 or friction is generated on the contact surface between the clamp assisting means 6 and the hub 8. In the present invention, since the clamp assisting means 6 and the optical disk 2 are separated from each other, there is no fear of the above. Since friction does not occur on the contact surface between the clamp assisting means 6 and the hub 8, abrasion powder does not adhere to the reproducing surface of the optical disc 2 and a reading error can be prevented.

[Brief description of drawings]

FIG. 1 is a vertical sectional view (a) when an optical disc is inserted and a vertical sectional view (b) when recording / reproducing in an optical disc reproducing apparatus having a double-sided access structure according to a first embodiment of the present invention.

FIG. 2 is a vertical sectional view (a) when an optical disc is inserted and a vertical sectional view (b) when recording / reproducing in an optical disc reproducing apparatus having a double-sided access structure according to a second embodiment of the present invention.

FIG. 3 is a vertical sectional view (a) when an optical disc is inserted and a vertical sectional view (b) when recording / reproducing in an optical disc reproducing apparatus having a double-sided access structure according to a third embodiment of the present invention.

FIG. 4 is a vertical sectional view (a) when an optical disc is inserted and a vertical sectional view (b) when recording / reproducing in an optical disc reproducing apparatus according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Optical disk reproducing apparatus 2 ... Optical disk 3 ... Spindle motor 4 ... Clamping means 5 ... Optical disk suctioning means 6 ... Clamping assisting means 7a ... 1st optical system 7b ... -Second optical system 8 ... Hub 9 ... Guide rod 10a ... First rack 10b ... Second rack 11 ... Pinion 21, 28 ... Notch portion 22, 27 ... Pins 23, 24, 25, 26 ... Roller 31 ... DC power supply 32a ... First coil 32b ... Second coil 33a, 33b ... Permanent magnet

Claims (4)

[Claims] 1. A clamp means for clamping an optical disc, a rotating means for rotating the optical disc, a clamp assisting means for securely attaching the optical disc to the clamp means, and a moving means for moving the clamp means and the rotating means. First moving means for moving the clamp assisting means, and second moving means for moving the clamp assisting means, the clamp assisting means, after the optical disc is clamped by the clamp means, An optical disk reproducing device characterized by being stopped at a position away from the optical disk. 2. The optical disk reproducing apparatus according to claim 1, wherein at least one of the first moving means and the second moving means utilizes a rotational force of a gear. 3. At least one of the first moving means and the second moving means uses the rotational movement of a protrusion provided on a surface excluding the center of rotation of the rotating body. The optical disk reproducing device according to claim 1. 4. The optical disk reproducing apparatus according to claim 1, wherein at least one of the first moving means and the second moving means utilizes the magnetic force of an electromagnet.