JPH04305858A - Disk clamper - Google Patents

Abstract

PURPOSE:To miniaturize a disk player by clamping a disk only from one side. CONSTITUTION:The disk 101 can be inserted and held by plural clamping member 9 supported turnably with a disk table 2 and turned and energized by a tortion spring 11 in cooperating with a placing part 3.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk clamp device for holding disks such as so-called optical disks and magneto-optical disks.

0002

2. Description of the Related Art Conventionally, disks for recording and/or reproducing information signals, such as so-called optical disks and magneto-optical disks, have been proposed. This disk has a transparent disk-shaped disk substrate made of a material such as synthetic resin. One main surface of this disk substrate serves as a signal recording surface. That is, in this disc, a signal recording layer is provided on the other main surface of the disc substrate, and when writing and/or reading information signals to and from the disc, the signal recording layer is placed on the disc substrate from the signal recording surface. A light beam such as a laser beam is condensed and irradiated onto the signal recording layer through the signal recording layer.

[0003] This disc is provided with a center hole in the center thereof, which is used when the disc is held by a disc clamp device of a so-called disc player device that writes and/or reads information signals to and from the disc. . This center hole is a circular through hole whose center coincides with the center of curvature of a spiral recording track formed in a substantially concentric circle shape in the signal recording layer, and is located on one side of the disk substrate. It penetrates from one main surface to the other main surface.

[0004] The disk clamping device includes a substantially disk-shaped disk table and a chucking member disposed opposite to the disk table and capable of moving toward and away from the disk table. There is. That is, the disk is held by the disk clamping device by placing the peripheral portion of the center hole on one main surface of the disk on the disk table, and at the same time placing the peripheral portion of the center hole on the other main surface of the disk on the disk table. This is done by pressing and supporting the peripheral portion with the chucking member. That is, the peripheral portion of the center hole of the disk is held between the disk table and the chucking member. The disk table is attached to a rotating shaft of a spindle motor, and is configured to be rotated by the spindle motor.

[0005] In this disc player device, a centering member protruding from the disc table is fitted into the center hole. This centering member has a diameter reduced at the tip end and is formed into a substantially truncated conical shape, and its central axis is aligned with the central axis of the rotating shaft of the spindle motor. This centering member performs a so-called centering operation in which the center of the center hole is placed on the central axis of the rotating shaft by bringing the outer peripheral surface portion into contact with the inner peripheral portion of the center hole.

The disk thus centered and held is rotated by the spindle motor to write and/or read information signals to and from the signal recording layer by an optical pickup device and/or magnetic head device, etc. will be carried out.

[0007]

However, in the above-described disk clamping device, the disk table and the chucking member must be disposed so as to face each other with the disk interposed therebetween. Therefore,
In this disk clamp device, it is difficult to downsize the device configuration, particularly in the thickness direction of the disk. If this disk clamp device cannot be made smaller,
It becomes difficult to downsize and simplify the overall device configuration of the disk player device.

[0008]Furthermore, conventionally, in order to prevent damage to the disk due to dust adhesion or contact with fingers, etc., and to facilitate handling of the disk, the disk has been housed in a cartridge formed into a thin housing shape. A disk cartridge configured with the following has been proposed. In this disc cartridge, the disc housed in the cartridge is rotatable within the cartridge.

In order to hold the disk constituting such a disk cartridge by the disk clamp device, a pair of chucking holes are provided on both main surfaces of the cartridge so that the center hole of the disk faces outward. It is necessary to provide an opening. By providing a pair of chucking openings on both main surfaces of the cartridge,
The opening area of this cartridge increases, and there is a possibility that the cartridge may not be able to fully protect the disk.

The present invention has been proposed in view of the above-mentioned circumstances, and is designed so that the disk can be held from only one side of the disk, thereby reducing the size of the device configuration.
An object of the present invention is to provide a disk clamp device that can be simplified.

[0011]

[Means for Solving the Problems] In order to solve the above-mentioned problems and achieve the above-mentioned objects, a disk clamp device according to the present invention includes a disk table on which the peripheral portion of the center hole of the disk is placed, and a disk table on which the peripheral portion of the center hole of the disk is placed. Each of the clamping means includes a plurality of clamping means rotatably supported at a midway portion thereof, and a biasing means for biasing the clamping means to rotate in a direction away from a neutral rotational position of the clamping means. , one side of the supported part is the pressed part, and
The other side of the supported part is a clamp part, and when the disc is moved toward the disc table, the clamp part is inserted into the center hole of the disc,
The pressed portion is pressed and rotated by the peripheral portion of the center hole of the disk, and the clamp portion causes the peripheral portion of the center hole of the disk to cooperate with the disk table by the urging force of the urging means. It is made by holding it in place.

Further, the disk clamping device according to the present invention includes a disk table on which the peripheral portion of the center hole of the disk housed in the cartridge is placed, and a plurality of disks whose proximal ends are rotatably supported by the disk table. clamping means, and biasing means for biasing the clamping means to rotate in a direction away from the neutral rotational position of the clamping means, and each of the clamping means is configured to move the disk toward the disk table side. When the disc is loaded, the distal end is inserted into the center hole of the disc, and the distal end is pressed and rotated by the inner wall of the cartridge containing the disc,
The tip side cooperates with the disk table to clamp the peripheral portion of the center hole of the disk by the urging force of the urging means.

[0013]

[Function] In the disc clamping device according to the present invention, the plurality of clamping means whose middle parts are rotatably supported by the disc table on which the peripheral part of the center hole of the disc is placed are arranged such that one side of the supported part is As well as being used as a pressing part,
The other side of the supported part is a clamp part, and when the disc is moved toward the disc table, the clamp part is inserted into the center hole of the disc,
The pressed portion is pressed and rotated by the peripheral portion of the center hole of the disk, and the clamp portion urges the clamping means to rotate in a direction away from the neutral rotational position of the clamping means. The biasing force of the means clamps the area around the center hole of the disk in cooperation with the disk table, so that the disk is held only from one main surface side.

Further, in the disk clamping device according to the present invention, the plurality of clamping means are rotatably supported on the disk table on which the peripheral portion of the center hole of the disk housed in the cartridge is placed. , when the disk is moved toward the disk table, the tip end is inserted into the center hole of the disk, the tip side is pressed and rotated by the inner wall of the cartridge, and the tip side rotates; The area around the center hole of the disk is clamped together with the disk table by the urging force of the urging means which urges the clamping means to rotate in a direction away from the neutral rotational position of the clamping means. The disk is held from only one main surface side.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the drawings.

[First Embodiment] In this example, a disc clamping device according to the present invention is configured to be rotatably housed in a cartridge to hold a disc constituting the disc cartridge.

As shown in FIG. 2, the disk cartridge is comprised of a disk 101 and a cartridge 104 that accommodates the disk 101. The disk 101 is a so-called magneto-optical disk, and is formed into a disk shape from a material such as a transparent synthetic resin, and includes a disk substrate with one main surface serving as a signal recording surface. A signal recording layer formed by depositing a magnetic material is provided on the other main surface of the disk substrate. That is, to write and/or read information signals to and from the signal recording layer of the disc 101, a light beam such as a laser beam is focused on the signal recording layer from the signal recording surface through the disc substrate. This is done by irradiating the area with water.

In the central part of the disk 101, as shown in FIG.
As shown in FIG. 2, a center hole 102 is provided, which is a center hole used when the disk 101 is held by a so-called disk player device that writes and/or reads information signals to and from the signal recording layer. That is, in this disk 101, a portion of one main surface on the side surrounding the center hole 102 serves as the signal recording surface. The center hole 102 is a circular through hole penetrating from one main surface to the other main surface of the disk 101, and is formed in a substantially concentric spiral shape on the signal recording layer. The center is formed to coincide with the center of curvature of the recording track to be recorded.

The cartridge 104 has a substantially rectangular thin housing shape so as to accommodate the disk 101 therein. That is, the cartridge 104 has a substantially rectangular shape in which upper and lower main surfaces along each main surface of the disk 101 have sides slightly longer than the diameter of the disk 101. The disk 101 is housed in the cartridge 104, with one main surface serving as the signal recording surface facing the lower main surface, and the other main surface facing the upper main surface. There is.

A substantially circular chucking opening 108 is provided on the lower main surface of the cartridge 104. This chucking opening 108 is
It is a through hole having a slightly larger diameter than the center hole 102, and allows the center hole 102 and the surrounding area of the center hole 102 to face outward.

Note that each main surface of the cartridge 104 is provided with a recording/reproducing opening (not shown). This recording/reproducing opening is a substantially rectangular through hole,
It is provided from near the center of the main surface of the cartridge 104 to near one side of the main surface, that is, near one edge of the cartridge 104. This recording/reproducing opening exposes a part of the main surface of the disk 101 to the outside, extending over the inner and outer peripheries of the disk 101. This recording/reproducing opening is used when an optical pickup device, a magnetic head device, etc. of the disc player device writes and/or reads an information signal to the signal recording layer of the disc 101. Connect the magnetic head device etc. to the above disk 1.
This is to prepare you for 01.

Further, the inner wall of the cartridge 104 is provided with the disk 1 inside the cartridge 104.
In order to regulate the amount of movement in the thickness direction of the center hole 102, an annular protrusion 106 facing one main surface and an annular protrusion 106 facing the other main surface correspond to the periphery of the center hole 102. A protruding portion 107 is provided in a protruding manner.

The disc clamping device according to the present invention is a device used in the above-mentioned disc player device, and is configured to include a disc table 2, as shown in FIG. This disk table 2 is formed into a substantially disk shape. The outer periphery of the upper surface of the disk table 2 is a mounting portion 3 on which the peripheral portion of the center hole 102 on one main surface of the disk 101 is placed.
It is said that This disk table 2 is coaxially attached to a drive shaft 1 of a spindle motor (not shown). A centering member 4 is provided protruding from the upper surface of the disc table 2 at the center thereof, that is, at the inner side of the mounting section 3 . This centering member 4 is formed in a cylindrical shape having a diameter approximately corresponding to the center hole 102.
It is designed so that it can be inserted into 2. A tapered portion 8 is formed on the upper end side of the centering member 4. The tapered portion 8 has a reduced diameter at the upper end and has a truncated conical shape.

When the disk 101 is placed on the mounting portion 3, the inner edge of the center hole 102 slides on the tapered portion 8 of the centering member 4 and is inserted into the center hole 102 of the centering member. 4 is inserted, a so-called centering operation is performed coaxially with respect to the centering member 4.

Clamp members 9, 9, 9, which are a plurality of clamp means, are attached to the disc table 2 so as to be rotatably supported in the middle. These clamp members 9, 9, 9 are installed inside the centering member 4 in correspondence with the radially provided clamp member attachment slits 5, 5, 5, respectively. That is, each of the clamp members 9 is supported by inserting a support shaft 10 provided in the clamp member attachment slit 5 into a shaft insertion hole 12 provided in the middle. The support shaft 10 is provided with its axial direction being the circumferential direction of the disc table 2. Each of the clamp members 9 is a substantially T-shaped member with arm portions protruding in two directions away from each other and in a direction substantially orthogonal to these two directions from a midway portion where the shaft insertion hole 12 is provided. It is formed. In these clamp members 9, one of the two-way arm portions that are separated from each other serves as a clamp portion 14, and the arm portion in a direction substantially orthogonal to this clamp portion 14 serves as a clamp portion 14.

In the initial state, each of the clamp members 9, 9, 9, as shown in FIG.
5 and 15 project radially outward from the centering member 4 to face above the mounting section 3, and the clamp sections 14, 14, and 14 project upward from the centering member 4. . Note that each clamp member mounting slit 5 is connected to each pressed portion 15 of the mounting portion 3.
It is formed all the way to the position where it faces.

A biasing means is provided between each of the clamp members 9 and the disc table 2 for biasing the clamp member 9 to rotate in a direction away from the neutral rotation position of the clamp member 9. A torsion coil spring 11 is interposed corresponding to each clamp member 9. These torsion coil springs 11 are connected to locking pins provided on the other of the two-way arm portions of the corresponding clamp members 9 that are separated from each other, that is, on the arm portions facing the clamp portion 14 through the shaft insertion hole 12. 13, the above disk table 2
is elastically pressed in the outward direction.

The neutral rotational position of the clamp member 9 is as follows:
As shown in FIG. 5, this is a position where the pressed portion 15 has been rotated approximately 45° in the direction of movement toward the placement portion 3 from the above-mentioned initial state. In this state, each torsion coil spring 11 presses the corresponding clamp member 9 in a direction toward the support shaft 10 from the locking pin 13, as shown by arrow C in FIG. Therefore, each of the torsion coil springs 11, as shown in FIGS. 2 to 4, locks the corresponding clamp member 9 when the clamp member 9 is in a position rotated in one direction from the neutral position. The clamp member 9 is biased to rotate in the one direction indicated by the arrow B in FIGS. 2 to 4, and as shown in FIGS. 6 to 10.
When it is at a position rotated in the other direction than the neutral position, it is urged to rotate in the other direction as indicated by arrow D in FIGS. 6 to 10.

The disc clamping device according to the present invention constructed as described above is disposed on a chassis 201 constituting the disc player device, as shown in FIG. The spindle motor (not shown) is attached to the chassis 201. Also, this chassis 201
At the top, the cartridge 104 is attached to the chassis 20 by bringing the tip end into contact with the cartridge 104.
A plurality of positioning pins 202 and 203 are installed for positioning at predetermined positions with respect to the positioning pin 1.

In this disc clamping device, as shown in FIG. 2, an operation is started to place the disc 101 on the mounting section 3 of the disc table 2, as indicated by arrow A in FIG. Then, each of the clamp portions 14 is inserted into the center hole 102 of the disk 101.

When the disk 101 approaches the mounting section 3 as shown by arrow A in FIG.
As shown in FIG.
The placed part 105, which is the peripheral part of 02, is the pressed part 1.
5. Further, when the disk 101 is moved toward the placement section 3, each of the clamp members 9 presses each pressed section 15 with the placement section 105, as shown in FIG. Against the urging force of each torsion coil spring 11, these pressed portions 15 are rotated in a direction to approach the placement portion 3. Furthermore, the above disk 1
01 is moved toward the placement section 3, each of the clamp members 9 is moved toward the placement section 105, as shown in FIG.
, and is rotated to the above-mentioned neutral rotation position.

Furthermore, when the disk 101 approaches the mounting section 3, each of the clamp members 9 causes each of the pressed sections 15 to be pressed by the mounting section 105, as shown in FIG. , these pressed parts 15 are rotated beyond the neutral rotation position in the direction of approaching the placement part 3 . When the disk 101 is brought closer to the placing section 3, as shown in FIG. Due to the biasing force of the twisted coil spring 11,
These pressed portions 15 are rotated in a direction that brings them closer to the placement portion 3 . Also, at this time, the disk 10
1, the centering operation is performed by the tapered portion 8 of the centering member 4.

When the disk 101 is further moved toward the mounting section 3, as shown in FIG.
The cartridge 104 has each of the positioning pins 202
, 203, and is positioned at a predetermined position relative to the chassis 201. At this time, the disc table 2 has entered the cartridge 102 through the chucking opening 108. Further, each of the clamp members 9 further pushes the pressed portion 15 onto the placement portion 3 by the pressing force of the placement portion 105 on the pressed portion 15 and the urging force of each torsion coil spring 11. is rotated in a direction that brings it closer to.

Each of the clamp members 9 is further moved by the biasing force of each torsion coil spring 11 to the pressed portion 15.
is rotated in the direction of bringing it closer to the placing part 3, and as shown in FIG. The main surface portion is brought into contact with the peripheral portion 103 of the center hole 102.

Each of the clamp members 9 is further rotated by the biasing force of the torsion coil spring 11, and as shown in FIG. , the above disk 10
1 to be placed 105 is held in cooperation with the above-mentioned placing part 3.

At this time, the disk 101 is positioned at a predetermined position with reference to the mounting portion 3 and the centering member 4, and is held by each of the clamp members 9. The disk 101 is rotatable within the cartridge 104, and is rotated together with the disk table 2 when the spindle motor rotates.

To remove the disk 101 from the disk table 2, the disk 101, together with the cartridge 104, may be moved upward away from the placement section 3. Then, each of the clamp members 9 is connected to the clamp portion 10 by the disk 101.
4 is pressed upward, and is rotated beyond the neutral rotation position to return to the initial state.

[0038] This disk clamping device is capable of clamping not only the disk 101 housed in the cartridge 104 as described above, but also when a disk not housed in the cartridge is placed alone on the loading section 3. As described above, the disk can be held well.

[Second Embodiment] In this example, a disk clamp device according to the present invention is used to hold a disk 101 that is rotatably housed in a cartridge 102 and constitutes a disk cartridge, as in the above-described embodiment. This is an example configured as something for.

[0040] As shown in FIG. 11, this disc clamping device is constructed with the disc table 2 described above. This disk table 2 is configured similarly to the disk table 2 in the above-described embodiment.

[0041] On the disk table 2, a plurality of clamp members 17, 17, 17, which are a plurality of clamp means, are attached to the disk table 2 so as to be rotatably supported on the proximal end side. These clamp members 17, 17, 17 are installed inside the centering member 4 in correspondence with the radially provided clamp member attachment slits 5, 5, 5, respectively. That is, each of the clamp members 17 is
A support shaft 10 provided in the clamp member attachment slit portion 5 is inserted into a shaft insertion hole 12 provided in the middle and supported. The support shaft 10 is provided with its axial direction being the circumferential direction of the disc table 2. Each of the clamp members 17 is formed as a substantially straight rod-shaped member. Each of these clamp members 9 has a clamp portion 14 at its tip end.

[0042] Each of the clamp members 17, 17, 17 is
In the initial state, as shown in FIG. 12, the clamp parts 14, 14, 14 are made to protrude above the centering member 4.

A biasing means is provided between each of the clamp members 17 and the disc table 2 for biasing the clamp member 17 to rotate in a direction away from the neutral rotation position of the clamp member 17. The torsion coil spring 11 is
An intervening arrangement is provided corresponding to each clamp member 17 . These torsion coil springs 11 are connected to the corresponding clamp members 1
A locking pin 13 provided further toward the base end than the shaft insertion hole 12 of No. 7 is elastically pressed toward the outer side of the disk table 2.

As shown in FIG. 14, the neutral rotational position of the clamp member 17 means approximately 4 degrees of rotation in the direction in which the clamp part 14 moves toward the mounting part 3 from the above-mentioned initial state.
This is the position rotated by about 5 degrees. In this state, each torsion coil spring 11 is connected to the corresponding clamp member 1.
7, as shown by arrow F in FIG.
It is pressed in the direction toward the support shaft 10. Therefore, each of the torsion coil springs 11, as shown in FIGS. 12 and 13, holds the corresponding clamp member 17 when the clamp member 17 is at a position rotated in one direction from the neutral position. The clamp member 17 is urged to rotate in the one direction indicated by the arrow E in FIGS. 12 and 13, and the clamp member 17 is rotated in the other direction from the neutral position as shown in FIGS. 15 and 16. 15 and 16 when
It is urged to rotate in the other direction indicated by the middle arrow G.

The disc clamping device according to the present invention constructed as described above is disposed on the chassis 201 constituting the disc player device, as shown in FIG. This chassis 201 has the plurality of positioning pins 202 and 203 planted therein.

In this disk clamp device, as shown in FIG. 12, the disk 101 is placed on the mounting portion 3 of the disk table 2 as indicated by arrow A in FIG.
When the operation of placing the disc 101 is started, each of the clamp parts 14 is inserted into the center hole 102 of the disc 101.

Then, when the disk 101 approaches the mounting section 3 as shown by arrow A in FIG. comes into contact with. Further, when the disk 101 is moved toward the placement section 3, each clamp member 17 is pressed by the cartridge 104, and the torsion coil springs 11 apply a biasing force. Against this, the clamp parts 14 are rotated in a direction to approach the mounting part 3. Furthermore, when the disk 101 is moved toward the mounting section 3,
As shown in FIG. 14, each of the clamp members 17 is pressed by the cartridge 104 and rotated to the neutral rotation position.

Furthermore, when the disk 101 approaches the mounting section 3, the clamp members 17 are pressed against the respective clamp sections 14 by the cartridge 104, as shown in FIG. 14 is rotated beyond the neutral rotation position in the direction of approaching the mounting portion 3. When the disk 101 is brought closer to the mounting section 3, the clamp members 17 are clamped by the pressing force of the cartridge 104 against the clamp sections 14 and the biasing force of the torsion coil springs 11. The portion 14 is rotated in a direction that brings the portion 14 closer to the placement portion 3 . Further, at this time, the disk 101 is subjected to the centering operation by the tapered portion 8 of the centering member 4. Further, the cartridge 104 is positioned at a predetermined position with respect to the chassis 201 by coming into contact with the tips of the respective positioning pins 202 and 203. At this time, the disc table 2 has entered the cartridge 102 through the chucking opening 108.

Each of the clamp members 17 is further rotated by the biasing force of each of the torsion coil springs 11 in a direction to bring the clamp portion 14 closer to the placement portion 3, and the clamp portion 14 is moved closer to the cartridge 104. At the same time, the clamping portion 14 is moved closer to the peripheral portion 10 of the center hole 102 on the other main surface portion of the disk 101.
3.

Each of the clamp members 17 is further rotated by the biasing force of the torsion coil spring 11.
As shown in FIG. 16, due to the urging force of the torsion coil spring 11, the disk 1 is
The peripheral part of the center hole 102 of 01 is placed in the above-described mounting part 3.
It works in conjunction with and holds it in place.

At this time, the disk 101 is positioned at a predetermined position with reference to the mounting portion 3 and the centering member 4, and is held by each of the clamp members 17. The disk 101 is rotatable within the cartridge 104, and is rotated together with the disk table 2 when the spindle motor rotates.

In order to remove the disk 101 from the disk table 2, it is sufficient to move the disk 101 together with the cartridge 104 upward away from the placement section 3. Then, each of the clamp members 9 is connected to the clamp portion 10 by the disk 101.
4 is pressed upward, and is rotated beyond the neutral rotation position to return to the initial state.

Note that the disk clamping device according to the present invention is not limited to a device for holding a disk that is a so-called magneto-optical disk, as shown in the above-mentioned embodiments, but is also applicable to a device that holds a disk that is an optical disk or a magnetic disk. It can also be configured as a device for holding. Further, in this disk clamping device, the number of clamping means is not limited to three as shown in each of the above embodiments, but a plurality of clamping means may be provided.

[0054]

As described above, in the disk clamping device according to the present invention, the plurality of clamping means whose intermediate portions are rotatably supported by the disk table on which the peripheral portion of the center hole of the disk is placed are: One side of the supported part is a pressed part, and the other side of the supported part is a clamp part, and when the disc is moved toward the disc table, the clamp is inserted into the center hole of the disc. is inserted through the disk, and the pressed portion is pressed and rotated by the peripheral portion of the center hole of the disk, and the clamping portion rotates the clamping means in a direction away from the neutral rotational position of the clamping means. The urging force of the urging means cooperates with the disk table to clamp the peripheral portion of the center hole of the disk.

Further, in the disc clamping device according to the present invention, the plurality of clamping means whose proximal end side is rotatably supported on the disc table on which the peripheral part of the center hole of the disc housed in the cartridge is placed. , when the disk is moved toward the disk table, the tip end is inserted into the center hole of the disk, the tip side is pressed and rotated by the inner wall of the cartridge, and the tip side rotates; The periphery of the center hole of the disk is clamped together with the disk table by the urging force of the urging means which urges the clamping means to rotate in a direction away from the neutral rotational position of the clamping means.

Therefore, the disk clamp device according to the present invention can hold each of the disks from only one main surface side.

That is, the present invention provides a disc clamping device which is capable of holding a disc from only one side of the disc, and which makes it possible to downsize and simplify the device configuration, thereby making it possible to downsize the device configuration of a disc player device. This is something that can be provided.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing the configuration of a disk clamp device according to the present invention.

FIG. 2 is a longitudinal cross-sectional view showing the state of the disc clamping device at the start of a disc holding operation.

FIG. 3 is a longitudinal sectional view showing a state in which the disk clamping device is in the middle of a disk holding operation and the clamping member is not rotated.

FIG. 4 is a longitudinal cross-sectional view showing a state in which the disk clamping device is in the middle of a disk holding operation and the clamping member has started rotating;

FIG. 5 is a longitudinal cross-sectional view showing a state in which the disk clamping device is in the middle of a disk holding operation and the clamping member is in a neutral rotation position.

FIG. 6 is a longitudinal cross-sectional view showing a state in which the disc clamping device is in the middle of a disc holding operation and the clamp member has been rotated beyond a neutral rotation position.

FIG. 7 is a longitudinal sectional view showing a state in which the disc clamping device is in the middle of a disc holding operation and a centering operation with respect to the disc has started.

FIG. 8 is a longitudinal cross-sectional view showing a state in which the disc clamping device is in the middle of a disc holding operation and a cartridge is at a predetermined mounting position.

FIG. 9 is a longitudinal cross-sectional view showing a state in which the disk clamping device is in the middle of a disk holding operation and the clamp member is moving the disk toward the disk table.

FIG. 10 is a longitudinal cross-sectional view showing a state in which the disc holding operation of the disc clamping device is completed.

FIG. 11 is an exploded perspective view showing another example of the configuration of the disk clamp device according to the present invention.

12 is a longitudinal sectional view showing the state of the disk clamping device shown in FIG. 11 at the start of the disk holding operation; FIG.

13 is a longitudinal cross-sectional view showing a state in which the disk clamp device shown in FIG. 11 is in the middle of a disk holding operation and the clamp member is not rotated; FIG.

14 is a longitudinal sectional view showing a state in which the disk clamping device shown in FIG. 11 is in the middle of a disk holding operation and the clamping member is at a neutral rotation position; FIG.

15 is a longitudinal cross-sectional view showing a state in which the disk clamping device shown in FIG. 11 is in the middle of the disk holding operation, the cartridge is at a predetermined mounting position, and the clamp member is rotated beyond the neutral rotation position; FIG. It is a front view.

16 is a longitudinal sectional view showing a state in which the disk clamping device shown in FIG. 11 has completed the disk holding operation; FIG.

[Explanation of symbols]

2・・・・・・・・・Disc table 9, 17
・・・・・・Clamp member

Claims (2)

[Claims] Claims: 1. A disk table on which a peripheral portion of a center hole of a disk is placed; a plurality of clamp means rotatably supported at intermediate portions on the disk table; and a biasing means for biasing the rotation in a direction away from the rotation position, and each of the clamping means has one side of the supported part serving as the pressed part, and the other side of the supported part serving as the clamping part. When the disk is moved toward the disk table, the clamp portion is inserted into the center hole of the disk, and the pressed portion is pressed and rotated by the peripheral portion of the center hole of the disk. Then, by the above-mentioned clamp part,
A disk clamp device configured to clamp the peripheral portion of the center hole of the disk by the urging force of the urging means in cooperation with the disk table. 2. A disk table on which a peripheral portion of a center hole of a disk stored in a cartridge is placed, a plurality of clamp means whose proximal ends are rotatably supported by the disk table, and each of the clamp means. and biasing means for urging the clamping means to rotate in a direction away from the neutral rotational position, and each of the clamping means is configured to rotate the center of the disk when the disk is moved toward the disk table. The distal end side is inserted into the hole, and the distal end side is pressed and rotated by the inner wall of the cartridge containing the disk, and the distal end side causes the area around the center hole of the disk to be pushed by the biasing force of the biasing means. A disc clamping device that works together with the disc table to clamp the disc.