JP2003132609A - Disk chucking device, and recording and/or reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily remove a disk placed on a turntable and to prevent the dropout of the disk from a center cap. SOLUTION: A disk chucking device is provided with: a turntable 8 which has a surface 8a for placing a disk 2 and is rotationally driven; a center cap 9 which is projected from the center of rotation of the turntable 8, centers the disk 2 by engaging with the center hole 2a of the disk 2 placed on the placing surface 8a of the turntable 8, and is pressed into the inside of the turntable 8 by pressing; a plurality of chuck claws 11 which are projected from the outer circumferential part of the center cap 9 and pressed into the inside of the center cap 9 by pressing; and a dropout prevention member 50 which is flexible and projecting in the direction that the diameter expands from the tip part of the center cap 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk chucking device for chucking a disk. The present invention also relates to a recording and / or reproducing apparatus that records and / or reproduces a signal on a disk which is a recording medium.

[0002]

2. Description of the Related Art Conventionally, a recording and / or reproducing apparatus for recording and / or reproducing a signal on / from a disk which is a recording medium, chucks the disk on a turntable which is rotationally driven by a spindle motor. Equipped with a disk chucking device.

As a disk chucking device, there is, for example, a ball chucking system or a claw chucking system. In both cases, the center hole of the disk is fitted into the center cap protruding from the rotation center of the turntable. Thus, the centering of the disc is performed, and the chucking of the disc is performed by holding the inner peripheral portion of the disc placed on the turntable by the plurality of chuck claws protruding from the outer peripheral portion of the center cap. There is.

For example, a disk chucking apparatus 200 shown in FIGS. 54, 55 and 56 is a center for centering a turntable 202 on which a disk 201 is mounted and a disk 201 mounted on the turntable 202. The turntable 2 includes the cap 203 and the disc 201 fitted to the center cap 203.
02 and a plurality of chuck claws 204 to be held on the upper part.

The turntable 202 is a disc 201.
Has a mounting surface 202a on which is mounted, and the center portion thereof is attached to the rotary shaft 205 of the spindle motor, so that it is rotationally driven by the driving force of the spindle motor.

The center cap 203 is used for the disk 20.
It has an outer shape corresponding to one central hole 201a and is provided so as to project from the rotation center of the turntable 202. In addition, a plurality of notches 206 for projecting the plurality of chuck claws 204 from the inside are formed on the outer peripheral portion of the center cap 203. These plural notches 2
A plurality of 06 are formed on the outer peripheral portion of the center cap 203 at equal intervals.
The outer peripheral portion of 03 is formed at three positions.

The plurality of chuck claws 204 are provided inside the center cap 203 so that the tips thereof protrude from the notches 206 of the center cap 203.
The plurality of chuck claws 204 are urged by a compression coil spring 207 provided inside the center cap 203 in a direction projecting from the cutout portion 206 of the center cap 203. Therefore, the plurality of chuck claws 204 can be pushed into the center cap 203 by being pressed.

In the disk chucking device 200 configured as described above, when the disk 201 is mounted on the mounting surface 202a of the turntable 202, the center hole 201a of the disk 201 is placed in the center cap 20.
The disc 201 is pressed against the mounting surface 202a of the turntable 202 in a state of being fitted to the turntable 202. At this time, the plurality of chuck claws 204 are pushed into the center cap 203 while being in sliding contact with the inner peripheral portion of the disk 201, and then the notch 2 of the center cap 203.
Turntable 202 by protruding from 06
The inner peripheral portion of the disk 201 mounted on the mounting surface 202a of FIG. As a result, the disc 201 can be placed on the placement surface 202a of the turntable 202.

On the other hand, the mounting surface 20 of the turntable 202
When removing the disc 201 mounted on the 2a, the disc 201 is placed on the mounting surface 2 of the turntable 202.
Push up while warping in the direction away from 02a. At this time, the plurality of chuck claws 204 are pushed into the center cap 203 while slidingly contacting the inner peripheral portion of the disc 201, thereby releasing the holding state of the disc 201. This makes the turntable 2
The disk 201 mounted on the mounting surface 202a of No. 02 can be removed.

[0010]

By the way, in the above-mentioned conventional disk chucking apparatus 200, the disk 2 mounted on the mounting surface 202a of the turntable 202 is mounted.
When removing 01, it was necessary for the user to push up the disc 201 while warping it in the direction away from the mounting surface 202a of the turntable 202.

For this reason, the user feels a sense of discomfort due to the warp of the disc 201 and anxiety due to the deformation of the disc 201, which is not always preferable for removing the disc 201. Further, it is not preferable to give a load to the disc 201, such as pushing it up while warping it.

As a disk chucking device for easily removing such a disk, for example, in the disk chucking device disclosed in Japanese Patent Laid-Open No. 2000-322799, the disk is detached from the mounting surface of the turntable. By providing a separating member and pressing a centering member (corresponding to the center cap 203), the separating member is projected from the mounting surface of the turntable, and a holding member (corresponding to the chuck claw 204). It has been proposed to release the holding state of the disc by the method and push up the disc in a direction away from the mounting surface of the turntable.

However, in such a disk chucking device, although it is easy to remove the disk mounted on the mounting surface of the turntable, when the disk is chucked vertically, for example, the turntable is mounted. There was a risk of dropping the disc pushed up in the direction away from the surface.

Therefore, the present invention has been proposed in view of such conventional circumstances, and makes it possible to easily remove the disc and prevent the disc from falling off. The purpose is to provide.

It is another object of the present invention to provide a recording and / or reproducing apparatus which facilitates the removal of the disc and prevents the disc from falling off, thereby further improving the convenience. And

[0016]

DISCLOSURE OF THE INVENTION A disk chucking device according to the present invention has a mounting surface on which a disk having a central hole is mounted, a turntable which is rotationally driven, and a rotation center of the turntable. The disk is centered by being projected and fitted into the center hole of the disk mounted on the mounting surface of the turntable.
A centering part that is pushed into the turntable by being pressed, a holding part that holds the disc fitted to the centering part on the mounting surface of the turntable, and the centering part are pressed to move the disc. A disc push-up portion that pushes up in a direction away from the placement surface of the turntable, and a fall prevention portion that is flexible and that projects from the tip of the centering portion in a direction in which the diameter increases are provided. I am trying.

As described above, in the disk chucking device according to the present invention, since the drop-out preventing portion is flexible, by elastically deforming the drop-out preventing portion, the center hole of the disk with respect to the centering portion. Can be inserted and removed. Since the drop-out preventing portion is provided so as to project from the tip of the centering portion in a direction in which the diameter increases, when the disc placed on the placing surface of the turntable is removed, Thus, the disc pushed up in the direction away from the mounting surface of the turntable can be received, and in particular when used vertically, it is possible to prevent the disc from falling off from the centering portion.

Further, the recording and / or reproducing apparatus according to the present invention is a disk chucking mechanism for chucking a disk having a center hole, and a disk rotation drive for rotating the disk chucked by the disk chucking mechanism. A mechanism and a recording / reproducing mechanism for recording and / or reproducing a signal to / from a disk which is rotationally driven by the disk rotational driving mechanism. The disk chucking mechanism has a mounting surface on which the disk is mounted,
The centering of the disc is achieved by fitting the turntable that is driven to rotate by the disc rotation drive mechanism and the center hole of the disc that is projected from the rotation center of the turntable and placed on the placement surface of the turntable. By performing the pressing, the centering part is pushed into the turntable by pressing, the holding part that holds the disc fitted in the centering part on the mounting surface of the turntable, and the centering part are pressed. , A disc push-up portion that pushes up the disc in a direction away from the placement surface of the turntable, and a drop-out prevention portion that is flexible and that projects from the tip of the centering portion in a direction in which the diameter increases It is characterized by that.

As described above, in the recording and / or reproducing apparatus according to the present invention, since the drop-out preventing portion has flexibility, the drop-out preventing portion is elastically deformed so that the centering portion of the disk is not deformed. The central hole can be inserted and removed. Since the drop-out preventing portion is provided so as to project from the tip of the centering portion in a direction in which the diameter increases, when the disc placed on the placing surface of the turntable is removed, Thus, the disc pushed up in the direction away from the mounting surface of the turntable can be received, and in particular when used vertically, it is possible to prevent the disc from falling off from the centering portion.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION A disk chucking device and a recording and / or reproducing device to which the present invention is applied will be described below in detail with reference to the drawings.

First, a disk drive device shown as the first embodiment of the present invention will be described.

A disc drive device 1 shown in FIG. 1 is a recording and / or reproducing device to which the present invention is applied for recording and / or reproducing a signal on an optical disc 2. Also,
The optical disk 2 has a substantially disc shape, has a central hole 2a in the center thereof, and has a main surface facing an optical pickup 5 described later as a signal recording surface.

The disk drive device 1 includes a disk chucking mechanism 3 for chucking the optical disk 2.
1, a spindle motor 4 which is a disk rotation driving mechanism for rotating the optical disk 2 chucked by the disk chucking mechanism 3 in a direction indicated by an arrow A in FIG. 1, and an optical disk 2 rotationally driven by the spindle motor 4. An optical pickup 5 which is a recording / reproducing mechanism for recording and / or reproducing a signal, a pickup feeding mechanism 6 for feeding the optical pickup 5 in the radial direction of the optical disc 2 shown by an arrow B in the figure, and these. And a supporting chassis 7.

As shown in FIG. 2, the disk chucking mechanism 3 is a disk chucking device to which the present invention is applied, and includes a turntable 8 on which the optical disk 2 is placed and which is rotationally driven by a spindle motor 4. A center cap 9 which is fitted into the center hole 2a of the optical disc 2 mounted on the mounting surface 8a of the turntable 8 and which can be pushed into the mounting surface 8a of the turntable 8. The first compression coil spring 10 for urging the center cap 9 in a direction projecting from the mounting surface 8a of the turntable 8 and the optical disk 2 fitted to the center cap 9 are positioned and held on the turntable 8. , A plurality of chuck claws 11 that can be pushed into the center cap 9 and a plurality of chuck claws 11 A plurality of second compression coil spring 12 for urging in a direction to protrude from the outer peripheral portion of the cap 9, the plurality of chuck jaws 11 and the second compression coil spring 12
Has a lid 13 for sealing the center cap 9 housed therein.

The turntable 8, the center cap 9, the plurality of chuck claws 11 and the lid 13 are made of a material such as plastic, and the first and second compression coil springs 10 and 12 are made of metal or the like. It is formed by winding an elastic body in a coil shape.

As shown in FIGS. 2 to 5, the turntable 8 has a mounting portion 14 on which the optical disk 2 is mounted, a center cap mounting recess 15 on which the center cap 9 is mounted, and a rotary shaft of the spindle motor 4. 4a and the support part 16 supported by 4a, and these are integrally formed.

Specifically, the mounting portion 14 has a substantially disc shape, and the upper surface thereof is the mounting surface 8 on which the optical disk 2 is mounted.
It is a. Further, a flexible material such as rubber is provided on the mounting surface 8a over the entire circumference so that the friction with the mounted optical disk 2 is increased. Here, a film-shaped rubber member 17 is attached to the outer peripheral portion of the mounting surface 8a.
Are formed in a ring shape corresponding to the outer peripheral portion of the mounting surface 8a.

The center cap mounting recess 15 is formed so as to bulge from the center of the mounting portion 14 toward the side opposite to the mounting surface 8a, and has an inner shape corresponding to the center cap 9. . Further, a substantially cylindrical first spring receiving portion 18 in which the first compression coil spring 10 is fitted and held is integrally formed with a bottom surface at the center of the bottom surface of the center cap mounting recess 15. . Further, on the inner side surface of the center cap mounting recess 15, a plurality of restricting projections 19 are provided for restricting the movement of the center cap 9 in a direction projecting from the mounting surface 8a of the turntable 8. The plurality of regulating protrusions 19 are provided on the center cap 9
Corresponding to the outer peripheral portion of the center cap 9, the outer peripheral portion of the center cap 9 is formed so as to project at a boundary position with the mounting surface 8a that divides the outer peripheral portion into three equal parts.

The support portion 16 is formed so as to project from the central portion of the bottom surface of the spring receiving portion 18 toward the side opposite to the mounting surface 8a. In addition, a through hole 20 is formed in the center of the support 16 so that the rotary shaft 4a of the spindle motor 4 penetrates therethrough. The turntable 8 has the support portion 16
The rotary shaft 4a of the spindle motor 4 is fixedly supported by the rotary shaft 4a of the spindle motor 4 by being inserted into the through hole 20 by press-fitting or the like. Therefore, the turntable 8 can be rotated by the driving force of the spindle motor 4.

In the disc chucking mechanism 3, the center cap 9 serves to center the optical disc 2 placed on the placement surface 8a of the turntable 8, and has an outer shape corresponding to the center hole 2a of the optical disc 2. It has a shape and is provided so as to project from the center of rotation of the turntable 8.

Further, the center cap 9 has a plurality of guide piece portions 21 which respectively hang down toward the center cap mounting recess 15 at positions where the outer peripheral portion of the center cap 9 is divided into three equal parts. In addition, stopper projections 22 that are engaged with the above-described restriction projections 19 of the turntable 8 are provided at the tips of the plurality of guide piece portions 21, respectively.
Are formed so as to project outward.

The center cap 9 is shown in FIG.
As shown in FIGS. 4 and 6, a plurality of chuck claws 1 are provided inside.
The chuck claw housing recess 23 for housing 1 and the support part 24 supported by the rotary shaft 4a of the spindle motor 4 are formed integrally in the bottom center of the chuck claw housing recess 23. It becomes.

Specifically, the chuck claw housing recess 23 has a plurality of holding portions 25 which are located in the middle of the adjacent guide piece portions 21 and hold the chuck claws 11, respectively.
Each of the plurality of holding portions 25 has a shape corresponding to a chuck claw 11 described later. In addition, a plurality of notches 26 are formed on the outer peripheral portion of the center cap 9 for projecting the chuck claws 11 held by the holding portions 25 of the chuck claw housing recesses 23 to the outside.
Further, on both sides of these notches 26, a pair of restricting pieces 27 are formed to restrict the movement of the chuck claws 11 in the direction projecting from the outer periphery of the center cap 9.

On the other hand, as shown in FIGS. 2 to 4 and 6, the chuck claw 11 has a protrusion 28 protruding from the notch 26 of the center cap 9 and the protrusion 28.
A pair of stopper pieces 29 on both sides of the
Has a positioning protrusion 30 on the opposite side thereof, and these are integrally formed.

Specifically, the protrusion 28 is provided when the optical disk 2 is mounted on the mounting surface 8a of the turntable 8.
The first inclined surface 28a, which is pressed in the direction of being pushed into the center cap 9 by being brought into sliding contact with the inner peripheral portion of the optical disk 2, and the mounting surface 8 of the turntable 8
When removing the optical disc 2 placed on a, the second slanted surface 28b, which is pressed in the direction of being pushed into the center cap 9 by being brought into sliding contact with the inner peripheral portion of the optical disc 2, is removed. Have In other words, the protrusion 28 includes the first inclined surface 28a and the second inclined surface 28b.
Are formed in a wedge shape by and. The protrusion 28
Is not limited to such a wedge-shaped protrusion and may be, for example, a hemispherical protrusion.

The pair of stopper pieces 29 are the protrusions 28.
Has a shape in which it is extended from both sides in the width direction and both ends thereof are bent substantially perpendicularly to the side opposite to the protruding portion 28. In addition, a pair of stopper protrusions 31 that are engaged with the pair of restricting piece portions 27 of the center cap 9 described above are formed at both ends of the pair of stopper piece portions 29 so as to project outward.

The positioning protrusion 30 is formed in a substantially columnar shape so as to protrude from the opposite side of the protrusion 28, and is fitted into the second compression coil spring 12 so that the second compression coil spring 12 with respect to the chuck claw 11 is inserted. Perform positioning.

In this center cap 9, as shown in FIGS. 2, 4 and 5, the support portion 24 is formed so as to project from the central portion of the bottom surface of the chuck claw accommodating recess 23 toward the rotary shaft 4a of the spindle motor 4. An insertion hole 32 through which the rotary shaft 4a of the spindle motor 4 is inserted is formed in the center portion thereof. Further, a second spring receiving portion 33 into which the second compression coil spring 12 is fitted and held is formed at the base end portion of the support portion 24. In addition, at the position where the outer peripheral portion of the supporting portion 24 is divided into three equal parts, the supporting portion 2 is
A guide portion 34 is formed so as to project from the base end portion 4 to the tip end portion.

In this disc chucking mechanism 3, the lid 13 is, as shown in FIGS. 2 and 4 to 6,
It has an outer shape corresponding to the above-mentioned center cap attachment recessed portion 15, and an insertion hole 35 through which the support portion 24 of the center cap 9 is inserted is formed in the center portion thereof. In addition, a plurality of guide grooves 36 that are respectively engaged with the guide portions 34 of the support portion 24 described above are inserted into the insertion holes 35.
Are formed. In addition, a plurality of pressing portions 37 for pressing and holding the second compression coil spring 12 in the holding portion 25 of the center cap 9 are formed on the lid 13 in a protruding manner.

In the disk chucking mechanism 3, the plurality of chuck claws 11 are held by the holding part 25 of the chuck claw accommodating recess 23 so that the protrusion 28 projects from the notch 26 of the center cap 9. In the chuck claw housing recess 23, one end of the second compression coil spring 12 is fitted into the positioning projection 30 of the chuck claw 11, and the other end is the second spring receiving portion 33 of the center cap 9.
The second compression coil spring 12 is held in a compressed state between the center cap 9 and the chuck claw 11 by being inserted into the.

On the other hand, the chuck claw 11 is urged by the elastic force of the second compression coil spring 12 in the direction in which the protrusion 28 projects from the notch 26 of the center cap 9, and the pair of restricting pieces of the center cap 9 are provided. By locking the pair of stopper protrusions 31 to the portion 27, the movement of the center cap 9 in the direction of protruding from the outer peripheral portion is restricted. Therefore, in the disc chucking mechanism 3, the plurality of chuck claws 11 can be pushed into the center cap 9 by being pressed.

In the disk chucking mechanism 3, a plurality of chuck claws 11 and the second compression coil spring 1 are used.
A lid 13 is attached to the center cap 9 so as to close the chuck claw storage recess 23 in which 2 is stored. Specifically, the lid 13 is positioned with respect to the center cap 9 by the engagement of the plurality of guide grooves 36 and the guide portion 34, and the support portion 24 of the center cap 9 is provided.
With the insertion hole 35 inserted in the center cap 9
Are attached so as to seal the.

The center cap 9 to which the lid 13 is attached is projected from the center of rotation of the turntable 8 with the rotary shaft 4a of the spindle motor 4 inserted through the insertion hole 32 of the support 24. The turntable 8 is mounted in the center cap mounting recess 15. Also, the center cap mounting recess 15
Then, one end of the first compression coil spring 10 is fitted into the support portion 24 of the center cap 9 and the other end is fitted into the first spring receiving portion 18 of the turntable 8, so that the first compression coil spring 10 is compressed. The coil spring 10 is held in a compressed state between the center cap 9 and the turntable 8.

On the other hand, the center cap 9 has a support portion 24.
By inserting the rotation shaft 4a of the spindle motor 4 into the insertion hole 32 of the spindle motor 4, the rotation shaft 4a of the spindle motor 4 is axially moved, that is, the mounting surface 8a of the turntable 8 is attached.
It is slidably supported in a direction orthogonal to the. As a result, the disk chucking mechanism 3 can accurately perform centering on the optical disk 2 mounted on the mounting surface 8a of the turntable 8, and the center cap 9 is provided along the rotation shaft 4a of the spindle motor 4. It can be moved smoothly.

The center cap 9 is urged by the elastic force of the first compression coil spring 10 in a direction projecting from the mounting surface 8a of the turntable 8, and the plurality of regulating projections 19 of the turntable 8 are provided. By locking a plurality of stopper protrusions 22 on the turntable 8
The movement in the direction of protruding from the mounting surface 8a is restricted. Therefore, in the disc chucking mechanism 3, the center cap 9 can be pushed into the turntable 8 by pressing the center cap 9.

By the way, the disc chucking mechanism 3 is, as shown in FIGS. 1 and 2, 4 and 5,
A detachment prevention member 5 for preventing the optical disc 2 from coming off the center cap 9 when the optical disc 2 placed on the placement surface 8a of the turntable 8 is removed.
Has 0.

The fall-off preventing member 50 is made of a flexible material such as elastomer, CR rubber, or silicon rubber in a substantially disc shape, and its center corresponds to the tip of the center cap 9. The protruding portion 50a is formed so as to project. Further, the chuck claws 11 protruding from the center cap 9 are provided on the outer peripheral portion of the drop-out preventing member 50.
A pair of projecting pieces 50b is projectingly formed at the positions corresponding to.

The drop-out preventing member 50 has an outer diameter that is slightly larger than the outer diameter of the center hole 2a of the optical disk 2, that is, the center cap, and the outer peripheral portion of the center cap 9 protrudes. It is pasted as. That is, the fall prevention member 50 is provided so as to protrude from the tip end portion of the center cap 9 in the direction in which the diameter increases. Here, the thickness of the fall prevention member 50 is about 0.3 mm.

In this disk drive device 1, the spindle motor 4 is for driving the optical disk 2 mounted on the mounting surface 8a of the turntable 8 to rotate, as shown in FIG. It is attached to the apparatus main body (not shown) so as to penetrate the chassis 7.

The optical pickup 5, as shown in FIG.
An optical system (not shown) for irradiating the optical disc 2 with a laser beam is provided, and the laser beam emitted from this optical system is recorded on the surface facing the optical disc 2 as a signal of the optical disc 2. An objective lens 38 for condensing light on the surface is provided. The optical pickup 5 also includes a biaxial actuator (not shown) that displaces the objective lens 38 in the optical axis direction of the objective lens 38 and in a direction substantially orthogonal to the optical axis direction of the objective lens 38. There is.

The optical pickup 5 is mounted on a feed base 39 which is moved by the pickup feed mechanism 6. On the other hand, the chassis 7 is formed with an opening 7a through which the optical pickup 5 attached to the feeding base 39 faces. The opening 7a corresponds to the movable range of the optical pickup 5 and corresponds to the optical disc 2
Is formed in a substantially rectangular shape along the radial direction.

As shown in FIG. 1, the pickup feed mechanism 6 has a guide shaft 40 that supports the feed base 39 movably in the radial direction of the optical disc 2. The guide shaft 40 is formed of a long columnar member, is arranged substantially parallel to the radial direction of the optical disc 2, and both ends thereof are fixedly supported by the chassis 7 by screwing or the like.

On the other hand, the feed base 39 has a first support piece 42 having a guide hole 41 inserted into the guide shaft 40 and an end edge portion of the chassis 7 forming the opening 7a. Two supporting pieces 43 are formed so as to project from both end portions facing each other. Therefore, the feed base 39 is provided with the guide shaft 40 and the guide hole 4 of the first support piece 42.
1 is slid together with the chassis 7 and the second support piece 4
By sliding 3 and 3, the optical disc 2 is supported so as to be movable in the radial direction shown by the arrow B in FIG.

The feed base 39 is moved and operated in the radial direction of the optical disc 2 by the driving force of the drive motor 44 provided on the chassis 7. Specifically, the rack portion 45 is formed on the first support piece 42 of the feed base 39 along the axial direction of the guide shaft 40, and the drive motor 4
A first gear 46 is attached to the rotating shaft of No. 4. A second gear 47 meshed with the first gear 46 is provided between the rack portion 45 and the first gear 46.
A third gear 48 located coaxially with the second gear 47, and a fourth gear 49 meshing with the third gear 48 and the rack portion 45. The fourth gears 47, 48, 49 are rotatably supported on the chassis 7 via a support shaft.

Therefore, this pickup feed mechanism 6
Then, when the drive motor 44 is rotationally driven, the rack portion 45 meshed with the fourth gear 49 while the rotation speed is adjusted by the first to fourth gears 46, 47, 48, 49 meshed with each other. Are moved in the axial direction of the guide shaft 40.
Along with this, the optical pickup 5 together with the feed base 39
Is moved in the radial direction of the optical disc 2 shown by the arrow B in FIG.

In the disk drive device 1 configured as described above, when the optical disk 2 is mounted on the mounting surface 8a of the turntable 8, first, as shown in FIG. 7, FIG. 8 and FIG. The two center holes 2a are fitted into the center cap 9 provided so as to project from the mounting surface 8a of the turntable 8. At this time, the fall prevention member 5
Since 0 has flexibility, the fall prevention member 50
By elastically deforming, the center hole 2a of the optical disc 2 can be inserted from the front end portion to the base end portion of the center cap 9.

Then, from the state where the center hole 2a of the optical disc 2 is fitted into the center cap 9, the optical disc 2 is pressed toward the mounting surface 8a of the turntable 8. At this time, the plurality of chuck claws 11 are
As shown in FIG. 1 and FIG. 12, the inner peripheral portion of the optical disc 2 and the first inclined surface 28a of the protruding portion 28 are brought into sliding contact with each other, so that the first inclined surface 28a is pressed to the inside of the center cap 9. Is pushed. Then, as shown in FIGS. 13, 14 and 15, the plurality of chuck claws 11 are pushed into the inside of the center cap 9 and then protrude from the cutout portion 26 of the center cap 9 to turn the turntable. The inner peripheral portion of the optical disc 2 mounted on the mounting surface 8a of the optical disc 8 is held. That is, the plurality of chuck claws 11 are formed on the inner peripheral portion of the optical disc 2 and the protrusion 28.
The second inclined surface 28b is in contact with the second inclined surface 28b. Thereby, the optical disc 2 can be placed on the placing surface 8a of the turntable 8.

In this disk drive device 1, when the optical disk 2 mounted on the mounting surface 8a of the turntable 8 is rotationally driven by the spindle motor 4, the optical pickup 5 moves the optical pickup 5 by the pickup feeding mechanism 6.
This optical pickup 5 while being fed in the radial direction of
Thus, recording and / or reproduction of a signal is performed on the optical disc 2. Specifically, the optical pickup 5 is moved by the pickup feeding mechanism 6 over the inner and outer circumferences of the optical disc 2, and the signal recording surface of the optical disc 2 is
By irradiating the laser light focused by the objective lens 38, recording and / or reproduction of a signal is performed.

On the other hand, in the disc drive device 1, when the optical disc 2 mounted on the mounting surface 8a of the turntable 8 is removed, first, the center cap 9 is pressed toward the mounting surface 8a of the turntable 8. To do. At this time, the plurality of chuck claws 11 are
7 and FIG. 18, the inner peripheral portion of the optical disc 2 and the second inclined surface 28b of the protrusion 28 are brought into sliding contact with each other, so that the second inclined surface 28b is pressed and the inside of the center cap 9 is pushed. Is pushed. As a result, the holding state of the optical disc 2 placed on the placing surface 8a of the turntable 8 is released. Then, as shown in FIGS. 19, 20, and 21, the plurality of chuck claws 11 are released after the holding state with respect to the optical disc 2 is released.
It projects from the notch 26 of the center cap 9.

Then, the pressing on the center cap 9 is released. At this time, the plurality of chuck claws 11 are
2, as shown in FIGS. 23 and 24, the optical disk 2 is separated from the mounting surface 8a of the turntable 8 by sliding contact between the inner peripheral portion of the optical disk 2 and the first inclined surface 28a of the protrusion 28. Push up in the direction. At this time, since the fall prevention member 50 is provided so as to project from the tip end portion of the center cap 9 in the direction in which the diameter increases, the direction in which the fall prevention member 50 is separated from the mounting surface 8a of the turntable 8 by the plurality of chuck claws 11. It is possible to receive the optical disc 2 that has been pushed up.

As shown in FIG. 25, the drop-out preventing member 50 has flexibility. Therefore, by elastically deforming the drop-out preventing member 50, the center hole of the optical disk 2 can be removed from the tip of the center cap 9. 2a can be detached. As a result, the optical disk 2 placed on the placement surface 8a of the turntable 8 can be removed.

As described above, in the disk drive device 1, the center cap 9 is pressed without giving a load to the conventional optical disk such that the optical disk is pushed up while being warped in the direction away from the mounting surface of the turntable. This makes it possible to easily remove the optical disc 2 mounted on the mounting surface 8a of the turntable 8 without touching the optical disc 2.

In this disc drive device 1, the drop-out preventing member 50 is provided so as to project from the tip of the center cap 9 in the direction in which the diameter increases, so that it is mounted on the mounting surface 8a of the turntable 8. When the placed optical disc 2 is removed, the plurality of chuck claws 11 can receive the optical disc 2 pushed up in a direction away from the placement surface 8a of the turntable 8.
In particular, when the disc drive device 1 is used vertically, it is possible to reliably prevent the optical disc 2 from falling off the center cap 9.

Therefore, this disk drive device 1
Then, by providing the above-described disc chucking mechanism 3, it is possible to further improve convenience and protect the optical disc 2.

Next, a disk drive device shown as a second embodiment of the present invention will be described.

The disc drive device shown as the second embodiment differs from the disc drive device 1 shown as the first embodiment in that instead of the disc chucking mechanism 3 shown in FIG. That is, the disc chucking mechanism 60 shown in FIG. Therefore, in the following description, the disk chucking mechanism 60 will be described, and the same parts as those of the disk drive device 1 will not be described and will be denoted by the same reference numerals.

This disc chucking mechanism 60 is another disc chucking device to which the present invention is applied, as shown in FIGS. 26, 27 and 28.
And a center hole 2a of the optical disk 2 mounted on the mounting surface 61a of the turntable 61.
The center cap 62, which is fitted to the turn table 61 and can be pushed into the mounting surface 61a of the turn table 61.
A first compression coil spring 63 that urges the first mounting surface 61a in a direction projecting from the mounting surface 61a; a plurality of chuck claws 64 that holds the optical disc 2 fitted in the center cap 62 while pressing it on the turntable 61; Multiple chuck claws 6
4 has a plurality of second compression coil springs 65 that urge the center cap 62 in a direction projecting from the outer peripheral portion of the center cap 62.

The turntable 61 has a substantially disk shape as a whole, and its upper surface is a mounting surface 61a on which the optical disk 2 is mounted. Further, a flexible material such as rubber is provided on the mounting surface 61a over the entire circumference of the outer peripheral portion thereof so as to increase friction with the mounted optical disk 2. Here, a film-shaped rubber member 66 is attached to the outer peripheral portion of the mounting surface 61a, and this rubber member 66 is formed in a ring shape corresponding to the outer peripheral portion of the mounting surface 61a.

A center cap mounting recess 67 to which the center cap 62 is mounted is formed in the center of the turntable 61. The center cap attachment recess 67 has an inner shape corresponding to the center cap 62, and a plurality of push-up piece portions 78 provided on the center cap 62, which will be described later, are provided at positions that divide the outer periphery into three equal parts. A plurality of push-up piece storage recesses 68 that are respectively stored are formed.

The center cap mounting recess 67
And the plurality of push-up piece storage recesses 68 are provided between the chuck claws 6 in a direction projecting to the push-up piece storage recess 68 side.
A restriction wall 69 that restricts the movement of the No. 4 and a pair of bearing portions 70 that are located on both sides of the restriction wall 69 and that rotatably support the chuck claws 64 are provided upright.

Further, a substantially columnar support portion 71 fixedly supported by the rotary shaft 4a of the spindle motor 4 is provided upright at the center of the bottom surface of the center cap mounting recess 67. Further, between the support portion 71 and the pair of bearing portions 70,
By arranging the pair of partition walls 72 upright, a chuck claw housing recess 73 for housing a chuck claw 64 described later is formed.

Further, an insertion hole 74 through which the rotary shaft 4a of the spindle motor 4 is inserted is formed in the center of the support portion 71, that is, the center of the turntable 61. In the turntable 61, the rotary shaft 4a of the spindle motor 4 is inserted into the insertion hole 74 of the support portion 71 by press fitting or the like, whereby the rotary shaft 4 of the spindle motor 4 is inserted.
It is fixedly supported by a. Therefore, the turntable 61 can be rotated by the driving force of the spindle motor 4.

Further, on the outer peripheral portion of the support portion 71, a spring receiving projection 75 which is located in each chuck claw receiving recess 73 and is fitted into one end of the second compression coil spring 65, and each chuck claw receiving recess. Located between 73 and the turntable 61
And a plurality of restricting protrusions 76 that restrict the movement of the center cap 62 in the direction of protruding from the mounting surface 61a. Further, on the upper surface of the supporting portion 71, the first
A substantially annular spring receiving groove 77 is formed in which one end of the compression coil spring 63 is fitted.

The center cap 62 is for centering the optical disk 2 mounted on the mounting surface 61a of the turntable 61, and is provided so as to project from the center of rotation of the turntable 61.

The center cap 62 has an outer shape corresponding to the center hole 2a of the optical disk 2, and when it is fitted into the center hole 2a of the optical disk 2, the surface (outer circumference) which is in sliding contact with the optical disk 2 is fitted. Part) is formed in a substantially arc shape or a substantially taper shape, so that even when the optical disc 2 having a laminating structure is placed, for example, a discrepancy in laminating the upper disc and the lower disc may occur. Instead, it is possible to perform proper positioning.

A plurality of push-up pieces 78 for pushing up the optical disc 2 mounted on the mounting surface 61a of the turntable 61 are provided at the position where the outer peripheral portion of the center cap 62 is divided into three equal parts from the outer peripheral portion. It is formed so as to project outward. In addition, the plurality of push-up pieces 78,
Chuck claw 6 stored inside the center cap 62
Opening 79 for chuck claw for protruding 4 to the outside
Are formed respectively.

On the inner peripheral side of the center cap 62, there are formed a plurality of guide piece portions 80 which are located between the respective push-up piece portions 78 and which respectively hang down toward the center cap mounting recess 67. There is. These guide pieces 80
A stopper protrusion 81 that is locked to the restriction protrusion 76 of the turntable 61 is formed at the tip end of the protrusion inwardly. Also, this center cap 62
A spring receiving recess 82 into which the other end of the first compression coil spring 63 is fitted is formed in the center portion on the inner peripheral side of the.

The plurality of chuck claws 64 have a projection 83 protruding from the chuck claw opening 79 of the center cap 62 at the tip and a spring fitted at the other end of the second compression coil spring 65 at the base. It has a receiving projection 84 and a pair of rotation shafts 85 that are rotatably engaged with the pair of bearings 70 of the center cap 62 on both sides of the base end, and these are integrally formed.

In this disc chucking mechanism 60,
The center cap 62 is attached to the center cap attachment recess 67 so as to protrude from the rotation center of the turntable 61.

At this time, in the center cap 62, the plurality of guide pieces 80 are elastically deformed, so that the plurality of stopper projections 81 pass over the plurality of restriction projections 76 of the turntable to support the turntable 61. 71 is engaged. In addition, each push-up piece 78 has the turntable 6
Each of the push-up piece storage recesses 68 is stored. Further, one end of the first compression coil spring 63 is fitted into the spring receiving groove portion 77 of the turntable 61, and the other end of the first compression coil spring 63 is fitted into the spring receiving concave portion 82 of the center cap 62. The first compression coil spring 63 causes the turntable 61 and the center cap 62 to
It is held in a compressed state between and.

Therefore, this center cap 62
Is urged by the elastic force of the first compression coil spring 63 in a direction projecting from the mounting surface 61a of the turntable 61, and the stopper projections 81 are engaged with the restriction projections 76 of the turntable 61. By being stopped,
The movement of the turntable 61 in the direction of protruding from the mounting surface 61a is restricted. Further, the center cap 62 can be pushed into the center cap mounting recess 67 of the turntable 61 by being pressed.

Also, the disk chucking mechanism 60
Then, the chuck nail opening 79 of the center cap 62
The plurality of chuck claws 6 so that the protrusions 83 protrude from the
With 4 stored in the center cap 62,
The turntable 61 is stored in the chuck claw storage recess 73.

At this time, the chuck claw 64 is rotatably engaged with the pair of bearings 70 of the turntable 61 by the pair of rotary shafts 85, so that the chuck claw housing recess 7 is formed.
3 and the position where the projection 83 is projected through the chuck claw opening 79, and the projection 83 is located in the chuck claw housing recess 73.
Is supported so as to be swingable with respect to a position housed inside. Further, the spring receiving projection 75 of the turntable 61 is fitted into one end of the second compression coil spring 65, and the spring receiving projection 84 of the chuck claw 64 is fitted into the other end of the second compression coil spring 65. Thus, the second compression coil spring 65 is held in a compressed state inside the chuck claw storage recess 73.

Therefore, the plurality of chuck claws 64 are
Is urged by the elastic force of the second compression coil spring 65 in the direction in which the projection 83 projects from the chuck claw opening 79 of the center cap 9, and the turntable 61
By abutting against the restriction wall 69, the movement in the direction of protruding from the chuck claw storage recess 73 is restricted. Further, the plurality of chuck claws 64 can be pushed into the inside of the chuck claw housing recess 73 against the biasing force of the second compression coil spring 65 by being pressed.

By the way, the disc chucking mechanism 60 is detached to prevent the optical disc 2 from falling off from the center cap 62 when the optical disc 2 mounted on the mounting surface 61a of the turntable 61 is detached. It has a prevention member 90.

The fall-off preventing member 90 is made of a flexible material such as elastomer, CR rubber, and silicon rubber in a substantially disc shape, and has a plurality of push-up pieces of the center cap 62 on its outer peripheral portion. Notches 90a are formed at positions corresponding to the portions 78, respectively. The drop-out prevention member 90 has an outer diameter that is slightly larger than the outer diameter of the center hole 2a of the optical disc 2, that is, the center cap 62, so that the outer peripheral portion protrudes from the tip end portion of the center cap 62. It is pasted. That is,
The fall prevention member 90 is provided so as to protrude from the tip end portion of the center cap 62 in the direction in which the diameter increases. Here, the thickness of the fall prevention member 90 is about 0.3 mm.

In the disk chucking mechanism 60 having the above-described structure, when the optical disk 2 is mounted on the mounting surface 61a of the turntable 61, first, as shown in FIG.
As shown in FIG. 9, the center hole 2a of the optical disk 2 is fitted into a center cap 62 provided so as to project from the mounting surface 61a of the turntable 61. At this time, since the fall prevention member 90 has flexibility, the fall prevention member 90 is elastically deformed so that the center hole 2a of the optical disc 2 extends from the front end portion to the base end portion of the center cap 61.
Can be inserted.

Then, from the state where the center hole 2a of the optical disc 2 is fitted in the center cap 62, the optical disc 2 is pressed toward the mounting surface 61a of the turntable 61. At this time, as shown in FIG. 30, the plurality of chuck claws 11 are pushed into the chuck claw accommodating recesses 73 by the protrusions 83 being pressed while slidingly contacting the inner peripheral portion of the optical disc 2. Then, as shown in FIG. 31, the plurality of chuck claws 64 are once pushed into the chuck claw housing recess 73 and then project from the chuck claw housing recess 73 to mount the turntable 61. Optical disc 2 mounted on surface 61a
Holds the inner circumference of. Thus, the optical disc 2 can be placed on the placement surface 61a of the turntable 61.

On the other hand, the mounting surface 6 of the turntable 61
When removing the optical disk 2 placed on the 1a,
First, as shown in FIG. 32, the center cap 62 is pressed toward the mounting surface 61 a of the turntable 61 and is tilted to the side opposite to the push-up piece 78. At this time, the plurality of push-up piece portions 78 protrude from the push-up piece portion storage recess 68, and the optical disc 2 is placed on the mounting surface 6 of the turntable 61.
Push up in the direction away from 1a. Along with this, the plurality of chuck claws 64 are pushed into the chuck claw accommodating recesses 73 by pressing the protrusions 83 that are in sliding contact with the inner peripheral portion of the optical disc 2. As a result, the holding state of the optical disc 2 placed on the placing surface 61a of the turntable 61 is released.

Next, as shown in FIG. 33, the pressing on the center cap 62 is released. At this time, since the drop-off preventing member 90 is provided so as to project from the tip end portion of the center cap 62 in the direction in which the diameter increases, the optical disc 2 pushed upward in the direction away from the mounting surface 61a of the turntable 61 is loaded. You can take it.

The fall prevention member 90 is shown in FIG.
As shown in FIG. 5, since the cap 90 has elasticity, the fall prevention member 90 is elastically deformed.
The center hole 2a of the optical disc 2 can be removed from the tip of the. As a result, the mounting surface 8a of the turntable 8 is
The optical disc 2 placed on the top can be removed.

As described above, in the disc chucking mechanism 60, the center cap 62 is pressed without giving a load to the conventional optical disc such that the optical disc is pushed up while being warped in the direction away from the turntable mounting surface. By tilting and tilting the optical disk 2, the optical disk 2 placed on the mounting surface 61a of the turntable 61 can be easily removed without touching the optical disk 2.

Then, this disk chucking mechanism 6
In No. 0, the drop-out prevention member 90 is provided so as to project from the tip end portion of the center cap 62 in the direction in which the diameter increases, and therefore, when the optical disk 2 mounted on the mounting surface 61a of the turntable 61 is removed. , Multiple push-up pieces 7
8 can receive the optical disc 2 pushed up in the direction away from the mounting surface 61a of the turntable 61. In particular, when the disc drive device including the disc chucking mechanism 60 is used vertically, it is possible to reliably prevent the optical disc 2 from falling off the center cap 62.

Therefore, in this disc drive apparatus, by including the above-mentioned disc chucking mechanism 60, it is possible to further improve the convenience and protect the optical disc 2.

Next, a disk drive device shown as a third embodiment of the present invention will be described.

The disk drive device shown as the third embodiment differs from the disk drive device 1 shown as the first embodiment in that instead of the disk chucking mechanism 3 shown in FIG. That is, the disc chucking mechanism 100 shown is provided. Therefore, in the following description, the disk chucking mechanism 100 will be described, and the same parts as those of the disk drive device 1 will not be described and will be denoted by the same reference numerals.

This disc chucking mechanism 100 is
As shown in FIG. 35, FIG. 36 and FIG. 37, there is another disk chucking device to which the present invention is applied, in which the optical disk 2 is placed and the turntable 101 rotated by the spindle motor 4 and the turn Table 1
01 is fitted into the center hole 2a of the optical disk 2 mounted on the mounting surface 101a, and the turntable 10
A center cap 102 provided so as to be capable of being pushed into the first mounting surface 101a; a plurality of first compression coil springs 103 for biasing the center cap 102 in a direction projecting from the mounting surface 101a of the turntable 101; A plurality of chuck claws 104 for holding the optical disc 2 fitted in the center cap 102 while pressing it on the turntable 101, and a plurality of chuck claws 104 for urging the plurality of chuck claws 104 in a direction projecting from the outer peripheral portion of the center cap 102. The second compression coil spring 105 and the turntable 10
It has a plurality of push-up members 106 that push up the optical disk 2 placed on the first mounting surface 101a.

The turntable 101 has a substantially disk shape as a whole, and its upper surface serves as a mounting surface 101a on which the optical disk 2 is mounted. Further, a flexible material such as rubber is provided over the entire circumference of the mounting surface 101a so as to increase friction with the mounted optical disc 2. Here, a film-shaped rubber member 107 is attached to the outer peripheral portion of the mounting surface 101a,
The rubber member 107 is formed in a ring shape corresponding to the outer peripheral portion of the mounting surface 101a.

A center cap mounting recess 108 to which the center cap 102 is mounted is formed in the center of the turntable 101. The center cap mounting recess 108 is formed by the center cap 10
The push-up piece 129 of the push-up member 106, which will be described later, has an inner shape corresponding to No. 2, and the outer circumferential portion is divided into three equal parts.
Is formed with a plurality of push-up piece storage recesses 109.

The center cap mounting recess 10
8 and the plurality of push-up piece storage recesses 109, restricting walls 110 that restrict the movement of the chuck claws 104 in the direction of projecting to the push-up piece storage recesses 109 side are provided on both sides of the restricting wall 110. Positioned, a pair of bearing portions 111 that rotatably support the push-up member 106 are provided upright.

Further, a substantially columnar support portion 112 fixedly supported by the rotary shaft 4a of the spindle motor 4 is provided upright at the center of the bottom surface of the center cap mounting recess 108. Further, a pair of partition walls 113 is provided upright between the support portion 112 and the pair of bearing portions 111 to form a chuck claw housing recess 114 for housing the chuck claw 104. Further, on the bottom surface of the chuck claw accommodating recess 114, a locking portion 115 that is locked to a stopper piece 131 of the push-up member 106, which will be described later, is formed to project.

The spindle motor 4 is provided at the center of the support 112, that is, at the center of the turntable 101.
An insertion hole 116 through which the rotary shaft 4a is inserted is formed. Then, this turntable 101 has the support portion 11
The rotary shaft 4a of the spindle motor 4 is fixedly supported by the rotary shaft 4a of the spindle motor 4 by being press-fitted or the like through the second insertion hole 116. Therefore, the turntable 101 can be rotated by the driving force of the spindle motor 4.

Further, on the outer peripheral portion of the support portion 112, there is a spring receiving projection 117 which is located in each of the chuck claw accommodating recesses 114 and is fitted into one end of the second compression coil spring 105.
A plurality of restriction protrusions 118 that restrict the movement of the center cap 102 in a direction protruding from the mounting surface 101 a of the turntable 101 are formed between the chuck claw storage recesses 114. Further, a plurality of spring receiving recesses 119 into which one ends of the first compression coil springs 103 are fitted are formed at positions close to the plurality of restricting protrusions 118.

The center cap 102 is the optical disk 2 mounted on the mounting surface 101a of the turntable 101.
Centering the turntable 10
1 is provided so as to project from the center of rotation.

The center cap 102 has an outer shape corresponding to the center hole 2a of the optical disc 2, and when it is fitted into the center hole 2a of the optical disc 2, a surface (outer periphery) which is in sliding contact with the optical disc 2 is fitted. Part) is formed in a substantially arc shape or a substantially taper shape, so that even when the optical disc 2 having a laminating structure is placed, for example, a discrepancy in laminating the upper disc and the lower disc may occur. Instead, it is possible to perform proper positioning.

The center cap 102 is provided at a position where the outer peripheral portion of the center cap 102 is divided into three equal parts.
Notch parts 120 are formed for projecting the chuck claws 104 housed in the inside to the outside.

Further, on the inner peripheral side of the center cap 102, a pair of pressing piece portions 121, which are located on both sides of each notch portion 120 and hang down toward the chuck claw accommodating recess 114, respectively. And the center cap mounting recess 108 located between the notches 120, respectively.
And a plurality of guide piece portions 122 that hang downward. Of these, a stopper protrusion 123 that is engaged with the restriction protrusion 118 of the turntable 101 is formed at the tip of the guide piece 122 so as to protrude inward. Further, one end of the center cap 102 on the inner peripheral side has a spring receiving recess 119 of the turntable 101.
A spring receiving recess 124 into which the other end of the first compression coil spring 103 fitted to is fitted is formed.

The plurality of chuck claws 104 have protrusions 125 protruding from the notches 120 of the center cap 102 at the tips and spring receiving protrusions fitted to the other ends of the second compression coil springs 105 at the bases. 126, a pair of rotating shafts 127 that are rotatably engaged with a pair of bearings 130 of the push-up member 106, which will be described later, on both sides of the base end, and a spring receiving protrusion 126.
A pair of pressing pieces 12 of the center cap 102 on both sides of the
It has a pair of operated projections 128 that are pressed by 1, and these are integrally formed.

The plurality of push-up members 106 are rotatably supported by a push-up piece 129 housed in the push-up piece storage recess 109 of the turntable 101 at one end and a pair of bearings 111 of the turntable 101 at the center. A pair of bearings 130 that are engaged with each other and rotatably support the pair of rotating shafts 127 of the chuck claw 104, and the turntable 10 at the other end.
Stopper piece 13 that is locked by the locking portion 115 of No. 1
1 and 1 are formed integrally with each other. Of these, the push-up piece 129 is formed with an opening 132 for penetrating the restriction wall 110 of the turntable 101. Further, a pair of pressed portions 133 that are pressed by the pair of pressing pieces 121 of the center cap 102 are provided at both ends of the stopper piece 131.

As shown in FIG. 38, the chuck claws 104 are attached to the push-up members 106 by rotatably engaging a pair of rotation shafts 127 with a pair of bearings 130.

In this disc chucking mechanism, as shown in FIGS. 35, 36 and 37, the push-up piece 12 is inserted into the push-up piece storage recess 109 of the turntable 101.
In the state where 9 is stored, the push-up member 106 to which the chuck claw 104 is attached is stored in the chuck claw storage recess 114 of the turntable 101.

At this time, the push-up member 106 has a pair of bearings 111 on the pair of bearings 111 of the turntable 101.
Is rotatably engaged with the push-up piece 129.
Is supported swingably between a position where the push-up piece storage recess 109 is projected and a position where the push-up piece 129 is stored inside the push-up piece storage recess 109.

On the other hand, the chuck claw 104 is projected from the chuck claw accommodating recess 114 through the notch 120 by the pair of rotating shafts 127 being rotatably engaged with the pair of bearings 130 of the push-up member 106. The position where the part 125 is projected and the protrusion 125 is the chuck claw housing recess 114.
Is supported so as to be swingable with respect to a position housed inside. Further, the spring receiving projection 117 of the turntable 101 is fitted into one end of the second compression coil spring 105, and the chuck claw 1 is attached to the other end of the second compression coil spring 105.
When the spring receiving protrusion 126 of No. 04 is fitted, the second compression coil spring 105 is moved to the chuck claw housing recess 1
It is held in a compressed state inside 14.

Therefore, the chuck claw 104 is biased by the elastic force of the second compression coil spring 105 in the direction in which the protrusion 125 projects from the notch 120 of the center cap 102, and the restriction wall 110 of the turntable 101. The movement in the direction of projecting from the chuck claw storage recess 114 is restricted by contacting with.
Further, when the chuck claw 104 is pressed, it can be pushed into the chuck claw housing recess 114 against the biasing force of the second compression coil spring 105.

Further, the disk chucking mechanism 10
At 0, from the notch 120 to the protrusion 1 of the chuck claw 104.
The center cap 102 is mounted in the center cap mounting recess 108 so that 25 projects.

At this time, in the center cap 102, the plurality of guide piece portions 122 are elastically deformed, so that the plurality of stopper projecting portions 123 pass over the plurality of regulating projecting portions 118 of the turntable 101 and the turntable 10 is turned on.
One of the support portions 112 is engaged. Further, one end of each first compression coil spring 103 is fitted into the spring receiving recess 119 of the turntable 101, and the other end of the first compression coil spring 103 is connected to the spring receiving recess 1 of the center cap 102.
The first compression coil spring 103 is held in a compressed state between the turntable 101 and the center cap 102 by being fitted in the 24.

Therefore, this center cap 102
Is urged by the elastic force of the plurality of first compression coil springs 103 in a direction projecting from the mounting surface 101a of the turntable 101, and the plurality of stopper projections 123 are attached to the plurality of restriction projections 118 of the turntable 101. Is locked, the movement of the turntable 101 in a direction projecting from the mounting surface 101a is restricted.
The center cap 102 can be pushed into the center cap mounting recess 108 of the turntable 101 by being pressed.

By the way, the disc chucking mechanism 100 is detached to prevent the optical disc 2 from falling off the center cap 102 when the optical disc 2 mounted on the mounting surface 101a of the turntable 101 is detached. It has a prevention member 140.

The fall-off preventing member 140 is made of a flexible material such as elastomer, CR rubber, or silicon rubber in a substantially disc shape, and has a plurality of cutout portions of the center cap 102 on its outer peripheral portion. Notches 140a are formed at positions corresponding to 120, respectively.

The drop-preventing member 140 is provided in the center hole 2a of the optical disc 2, that is, the center cap 102.
The outer diameter of the center cap 102 is slightly larger than the outer diameter of the center cap 102. That is, the fall prevention member 140
Are provided so as to project from the tip of the center cap 102 in the direction in which the diameter increases. Here, the thickness of the fall prevention member 140 is about 0.3 mm.

In the disk chucking mechanism 100 configured as described above, when the optical disk 2 is mounted on the mounting surface 101a of the turntable 101, first, as shown in FIG. Is fitted to a center cap 102 provided so as to project from the mounting surface 101a of the turntable 101. At this time, since the fall prevention member 140 has flexibility,
By elastically deforming the drop-off preventing member 140, the center hole 2a of the optical disc 2 can be inserted from the front end portion to the base end portion of the center cap 101.

Then, as shown in FIG. 40, the optical disk 2 is pressed toward the mounting surface 101a of the turntable 101 from the state where the center hole 2a of the optical disk 2 is fitted in the center cap 102. At this time, the plurality of chuck claws 104 are formed on the inner peripheral portion of the optical disc 2 and the protruding portion 1.
By sliding contact with 25, this protrusion 125 is pressed and pushed into the inside of the chuck claw housing recess 114. The plurality of chuck claws 104 are shown in FIG.
As shown in FIG. 1, after being once pushed into the chuck claw storage recess 114, the chuck claw storage recess 114 is
The inner peripheral portion of the optical disk 2 mounted on the mounting surface 101a of the turntable 101 is held by being projected from above.

Further, in the plurality of push-up members 106, when the push-up piece 129 is pushed down by the optical disc 2, the push-up piece 129 is housed in the push-up piece storage recess 109 of the turntable 101 and the stopper piece 129. The locked state between 131 and the locking portion 115 of the turntable 101 is released.

As a result, the optical disc 2 can be placed on the placement surface 101a of the turntable 101.

On the other hand, when removing the optical disk 2 mounted on the mounting surface 101a of the turntable 101, first, as shown in FIG. 42, the center cap 10 is removed.
2 is pressed toward the mounting surface 101a of the turntable 101. At this time, the plurality of chuck claws 104 are swung about the pair of rotation shafts 127 as a fulcrum by the pair of operated projections 128 being pressed by the pair of pressing pieces 121 of the center cap 102, and the projections. 125 is drawn into the chuck claw storage recess 114. As a result, the holding state of the optical disc 2 placed on the placement surface 101a of the turntable 101 is released.

Further, in the plurality of push-up members 106, the pair of pressed portions 133 are pressed by the pair of pressing piece portions 121 of the center cap 102, whereby the pair of bearing portions 13 are formed.
The push-up piece 129 is swung about 0 as a fulcrum, and the push-up piece 129 is projected from the push-up piece storage recess 109. As a result, the plurality of push-up members 106 mount the optical disk 2 on the turntable 1
01 is pushed up in a direction away from the mounting surface 101a.
Further, the stopper piece 1 of the plurality of push-up members 106
31 is locked to the locking portion 115 of the turntable 101.

Next, as shown in FIG. 43, the pressing on the center cap 102 is released. At this time, since the fall-off preventing member 140 is provided so as to project from the tip end portion of the center cap 102 in the direction in which the diameter increases,
It is possible to receive the optical disc 2 pushed up in the direction away from the mounting surface 101a of the turntable 101. As shown in FIG. 44, since the fall prevention member 140 has flexibility, the fall prevention member 14
By elastically deforming 0, the center hole 2a of the optical disc 2 can be removed from the tip of the center cap 102. Thereby, the optical disk 2 placed on the placing surface 101a of the turntable 101 can be removed.

As described above, in the disc chucking mechanism 100, the center cap 102 is pressed without giving a load to the conventional optical disc such that the optical disc is pushed up while being warped in the direction away from the turntable mounting surface. By doing so, the mounting surface 101a of the turntable 101 can be handled without touching the optical disk 2.
It is possible to easily remove the optical disk 2 placed on it.

The disk chucking mechanism 1
In 00, the fall prevention member 140 has the center cap 10
Since it is provided so as to project from the tip of the turntable 2 in the direction in which the diameter increases, the placement surface 101a of the turntable 101
When the optical disc 2 placed on the turntable 101 is removed, the placement surface 1 of the turntable 101 is moved by the plurality of push-up members 106.
Optical disc 2 pushed up in the direction away from 01a
I can accept it. In particular, when the disc drive device including the disc chucking mechanism 100 is used vertically, it is possible to reliably prevent the optical disc 2 from falling off the center cap 102.

Therefore, in this disc drive apparatus, by providing the above-mentioned disc chucking mechanism 100, it is possible to further improve the convenience and protect the optical disc 2.

Next, a disk drive device shown as the fourth embodiment of the present invention will be described.

The disk drive device shown as the fourth embodiment is different from the disk drive device 1 shown as the first embodiment in that instead of the disk chucking mechanism 3 shown in FIG. The disk chucking mechanism 150 shown in FIG. Therefore, in the following description, the disk chucking mechanism 150 will be described, and the parts equivalent to the disk drive device 1 will be omitted and the same reference numerals will be given.

This disk chucking mechanism 150 is
As shown in FIGS. 45, 46 and 47, there is shown another disk chucking device to which the present invention is applied, in which the optical disk 2 is placed and the turntable 151 which is rotationally driven by the spindle motor 4 and the turntable 151 Table 1
The turntable 15 is fitted into the center hole 2a of the optical disc 2 mounted on the mounting surface 151a of the turntable 15.
A center cap 152 provided so as to be capable of being pushed into the first mounting surface 151a; and a plurality of first compression coil springs 153 for biasing the center cap 152 in a direction projecting from the mounting surface 151a of the turntable 151, A plurality of chuck claws 154 for holding the optical disk 2 fitted in the center cap 152 while pressing it on the turntable 151, and a plurality of chuck claws 154 for urging the plurality of chuck claws 154 in a direction projecting from the outer peripheral portion of the center cap 152. The second compression coil spring 155 and the turntable 15
A plurality of push-up members 156 that push up the optical disk 2 placed on the mounting surface 151a of the first unit, the center cap 152, a plurality of chuck claws 154, and a push-up member 156.
And a third compression coil spring 158 for urging the movement operating member 157 in a direction projecting from the placement surface 151a of the turntable 151.
And have.

The turntable 151 has a substantially disk shape as a whole, and its upper surface serves as a mounting surface 151a on which the optical disk 2 is mounted. In addition, a flexible material such as rubber is provided on the mounting surface 151a over the entire circumference of the mounting surface 151a so as to increase friction with the mounted optical disk 2. Here, a film-shaped rubber member 159 is attached to the outer peripheral portion of the mounting surface 151a,
The rubber member 159 is formed in a ring shape corresponding to the outer peripheral portion of the mounting surface 151a.

In the center of the turntable 151, a center cap mounting recess 160 to which the center cap 152 is mounted is formed. The center cap mounting recess 160 is provided in the center cap 15
The push-up piece 183 of the push-up member 156, which will be described later, has an inner shape corresponding to 2, and the outer circumferential portion is divided into three equal parts.
Are formed with a plurality of push-up piece storage recesses 161.

The center cap mounting recess 16
Between 0 and the plurality of push-up piece storage recesses 161 are restriction walls 162 for restricting movement of the chuck claws 154 in a direction projecting to the push-up piece storage recesses 161 side, and on both sides of the restriction walls 162. Positioned, a pair of bearing portions 163 that rotatably support the push-up member 156 are provided upright.

Further, at the center of the bottom surface of the center cap mounting recess 160, a substantially cylindrical support portion 164 fixedly supported by the rotary shaft 4a of the spindle motor 4 is provided upright. Further, between the support portion 164 and the pair of bearing portions 163, a pair of partition walls 165 is provided upright to form a chuck claw storage recess 166 for storing the chuck claw 154. An engaging portion 167 that engages with a stopper piece 185 of the chuck claw 154, which will be described later, is formed on the bottom surface of the chuck claw housing recess 166.

Further, on the upper surface of the support portion 164, a substantially annular spring receiving groove portion 168 into which one end of the third compression coil spring 158 is fitted is formed.

Further, an insertion hole 169 through which the rotary shaft 4a of the spindle motor 4 is inserted is formed in the central portion of the supporting portion 164, that is, the central portion of the turntable 151. Then, the turntable 151 has the insertion hole 169 of the support portion 164 and the rotary shaft 4 of the spindle motor 4.
By a being inserted by press-fitting or the like, it is fixedly supported by the rotary shaft 4a of the spindle motor 4. Therefore, this turntable 151 is
It is possible to rotate by the driving force of.

Further, on the outer peripheral portion of the supporting portion 164, there is a spring receiving projection portion 170 which is located in each of the chuck claw accommodating concave portions 166 and is fitted into one end of the second compression coil spring 155.
A plurality of restricting protrusions 171 that restrict the movement of the center cap 152 in a direction protruding from the mounting surface 151a of the turntable 151 are formed between the chuck claw accommodating recesses 166 so as to protrude. Further, a plurality of spring receiving recesses 172 into which one ends of the first compression coil springs 153 are fitted are formed at positions close to the plurality of restriction protrusions 171.

The center cap 152 is the optical disc 2 mounted on the mounting surface 151a of the turntable 151.
Centering of the turntable 15
1 is provided so as to project from the center of rotation.

The center cap 152 has an outer shape corresponding to the center hole 2a of the optical disc 2, and when it is fitted into the center hole 2a of the optical disc 2, a surface (outer periphery) which is in sliding contact with the optical disc 2 is fitted. Part) is formed in a substantially arc shape or a substantially taper shape, so that even when the optical disc 2 having a laminating structure is placed, for example, a discrepancy in laminating the upper disc and the lower disc may occur. Instead, it is possible to perform proper positioning.

The center cap 152 is provided at a position where the outer peripheral portion of the center cap 152 is divided into three equal parts.
Notch portions 173 are formed for projecting the chuck claws 154 housed in the inside to the outside. Further, the center cap 152 is provided with the cutout portions 173 so as to be cut out so that the movement operation member 1 to be described later is formed.
A pair of pressing piece notches 174 for penetrating the pair of pressing piece portions 189 of 57 are formed. Further, a through hole 175 for penetrating the third compression coil spring 158 is formed in the center of the center cap 152.

On the inner peripheral side of the center cap 152, there are formed a plurality of guide piece portions 176 located between the cutout portions 173 and hanging toward the center cap mounting recess 160. . The turntable 151 is attached to the tip of the guide piece 176.
A stopper protrusion 177 that is locked to the restriction protrusion 171 is formed so as to protrude inward. Further, on the inner peripheral side of the center cap 152, there is formed a spring receiving recess 178 into which the other end of the first compression coil spring 153 whose one end is fitted into the spring receiving recess 172 of the turntable 151 is fitted. There is.

The plurality of chuck claws 154 have a protrusion 179 protruding from the notch 173 of the center cap 152 at the tip and a spring receiving protrusion fitted to the other end of the second compression coil spring 155 at the base. 180, a pair of rotation shafts 181 rotatably engaged with a pair of bearings 184 of a push-up member 156, which will be described later, on both sides of the base end, and a spring receiving protrusion 180.
And a pair of operated projections 182 that are pressed by a pair of pressing pieces 189 of a movement operation member 157, which will be described later, on both sides of
These are integrally formed.

The plurality of push-up members 156 are rotatable at one end to a push-up piece 183 housed in the push-up piece storage recess 161 of the turntable 151 and at a central portion to a pair of bearings 163 of the turntable 151. A pair of bearings 184 that are engaged with each other and rotatably support the pair of rotating shafts 181 of the chuck claws 154, and the turntable 15 at the other end.
Stopper piece 18 locked by the locking portion 167 of No. 1
5 and are integrally formed. Of these, the push-up piece 183 is formed with an opening 183a for penetrating the restriction wall 162 of the turntable 151. In addition, a pair of pressed portions 186 that are pressed by a pair of pressing pieces 189 of a movement operation member 157, which will be described later, are provided at both ends of the stopper piece 185.

The movement operating member 157 has a substantially disc shape corresponding to the upper surface of the center cap 152, and the third portion is provided at the center of the surface facing the center cap 152.
A spring receiving projection 187 is formed to project into the other end of the compression coil spring 158. Further, a plurality of cutout portions 188 corresponding to the cutout portions 173 of the turntable 151 are provided at positions where the outer peripheral portion of the movement operation member 157 is divided into three equal parts.
Are formed. Further, a pair of pressing piece portions 189, which are movement operation portions hanging down toward the center cap 152, are formed in a protruding manner at positions where they penetrate the pair of pressing piece portion notches 174 of the center cap 152.

In the disk chucking mechanism 150, the chuck claw 154 is provided with the push-up piece 183 stored in the push-up piece storage recess 161 of the turntable 151.
The push-up member 156 to which the
It is stored in the first chuck claw storage recess 166.

At this time, the push-up member 156 has a pair of bearings 184 in the pair of bearings 163 of the turntable 151.
Is rotatably engaged, the push-up piece 183 is
Is supported so as to be swingable between a position where the push-up piece storage recess 161 is projected and a position where the push-up piece storage portion 183 is stored inside the push-up piece storage recess 161.

On the other hand, the chuck claw 154 is projected from the chuck claw accommodating recess 166 through the notch 173 by the pair of rotating shafts 181 being rotatably engaged with the pair of bearings 184 of the push-up member 156. The position where the portion 179 is projected, and the protrusion 179 is formed in the chuck claw storage recess 166.
Is supported so as to be swingable with respect to a position housed inside. Further, the spring receiving projection 170 of the turntable 151 is fitted into one end of the second compression coil spring 155, and the chuck claw 1 is attached to the other end of the second compression coil spring 155.
When the spring receiving projection 180 of 54 is fitted, the second compression coil spring 155 is inserted into the chuck claw housing recess 1
It is held in a compressed state inside 66.

Therefore, the plurality of chuck claws 15 are
4 is urged by the elastic force of the second compression coil spring 155 in the direction in which the protrusion 179 protrudes from the notch 173 of the center cap 152, and the turntable 15
By abutting against the first regulation wall 162, the movement in the direction of protruding from the chuck claw storage recess 166 is regulated. Further, the plurality of chuck claws 154 can be pushed into the inside of the chuck claw housing recess 166 against the biasing force of the second compression coil spring 155 by being pressed.

Further, the disk chucking mechanism 15
At 0, the notch 173 to the protrusion 1 of the chuck claw 154.
The center cap 152 is attached to the center cap attachment recess 160 so that 79 is projected.

At this time, in the center cap 152, since the plurality of guide piece portions 176 are elastically deformed, the plurality of stopper projections 177 pass over the plurality of restriction projections 171 of the turntable 151, and the turntable 15 is turned on.
The support part 164 of 1 is engaged. Further, one end of each first compression coil spring 153 is fitted into the spring receiving recess 172 of the turntable 151, and the other end of the first compression coil spring 153 is connected to the spring receiving recess 1 of the center cap 152.
By fitting the first compression coil springs 153, the first compression coil springs 153 are held between the turntable 151 and the center cap 152 in a compressed state.

Therefore, this center cap 152
Is urged by the elastic force of the plurality of first compression coil springs 153 in the direction in which it projects from the mounting surface 151a of the turntable 151, and the plurality of stopper projections 177 are attached to the plurality of restriction projections 171 of the turntable 151. Is locked, the movement of the turntable 151 in the direction of protruding from the mounting surface 151a is restricted.
Further, the center cap 152 can be pushed into the center cap mounting recess 108 of the turntable 151 by being pressed.

Also, the disk chucking mechanism 15
At 0, the third compression coil spring 158 is inserted through the through hole 175 of the center cap 152 attached to the turntable 151, and the pair of pressing piece portions 189 is inserted through the pair of pressing piece cutouts 174. Then, the movement operation member 157 is attached.

At this time, the movement operating member 157 has the support portion 16 of the turntable 151 by the hook portion (not shown).
4 is engaged. Further, one end of the third compression coil spring 158 is fitted into the spring receiving groove portion 168 of the turntable 151, and the spring receiving projection 187 of the movement operating member 157 is fitted into the other end of the third compression coil spring 158. As a result, the third compression coil spring 158 is held in a compressed state between the turntable 151 and the movement operation member 157.

Therefore, the movement operating member 157 is
By the elastic force of the third compression coil spring 158, the third compression coil spring 158 is biased in a direction projecting from the mounting surface 151a of the turntable 151, and the hook portion is locked to a locking portion (not shown) of the turntable 151. Movement of the turntable 151 in a direction of protruding from the mounting surface 151a is restricted. Further, the movement operation member 157 is
By being pressed, the center cap 152 and the turntable 151 can be pressed into the mounting surface 151a side.

By the way, the disc chucking mechanism 150 is detached to prevent the optical disc 2 from falling off the center cap 102 when the optical disc 2 mounted on the mounting surface 101a of the turntable 101 is detached. It has a prevention member 190.

The fall-off preventing member 190 is made of a flexible material such as elastomer, CR rubber, or silicon rubber in a substantially disc shape, and has a plurality of cutout portions of the center cap 152 on its outer peripheral portion. Notches 190a are formed at positions corresponding to 173, respectively.

The drop-off preventing member 190 is provided in the center hole 2a of the optical disk 2, that is, the center cap 152.
The outer diameter is slightly larger than the outer diameter, and the outer peripheral portion is attached to the movement operating member 157 so as to protrude. That is, the fall prevention member 190 is provided so as to project from the tip end portion of the center cap 152 in the direction in which the diameter increases. Here, the thickness of the fall prevention member 50 is about 0.3 mm.

In the disk chucking mechanism 150 configured as described above, when the optical disk 2 is mounted on the mounting surface 151a of the turntable 151, first, as shown in FIG. Is fitted to a center cap 152 provided so as to project from the mounting surface 151a of the turntable 151. At this time, since the captive prevention member 190 has flexibility,
By elastically deforming the drop-off preventing member 190, the center hole 2a of the optical disc 2 can be fitted from the front end portion to the base end portion of the center cap 151.

Then, as shown in FIG. 49, the optical disc 2 is pressed toward the mounting surface 151a of the turntable 151 from the state where the center hole 2a of the optical disc 2 is fitted in the center cap 152. At this time, the plurality of chuck claws 154 are formed on the inner peripheral portion of the optical disc 2 and the protruding portion 1.
The projection 179 is pressed by sliding contact with 79, and is pushed into the inside of the chuck claw housing recess 166. The plurality of chuck claws 154 are shown in FIG.
As shown in 0, after being once pushed into the inside of the chuck claw storage recess 166, the chuck claw storage recess 166 is
The inner peripheral portion of the optical disc 2 mounted on the mounting surface 151 a of the turntable 151 is held by being projected from the above.

Further, in the plurality of push-up members 156, when the push-up piece 183 is pushed down by the optical disk 2, the push-up piece 183 is housed in the push-up piece storage recess 161 of the turntable 151 and the stopper piece 183. The locking state between the locking portion 167 of the turntable 151 and the locking portion 185 is released.

Thus, the optical disc 2 can be placed on the placing surface 101a of the turntable 101.

On the other hand, when removing the optical disk 2 mounted on the mounting surface 151a of the turntable 151, first, as shown in FIG. 51, the movement operating member 157 is mounted on the turntable 151 together with the center cap 152. It is pressed toward the surface 151a. At this time, the plurality of chuck claws 154 are swung about the pair of rotation shafts 181 as fulcrums by the pair of operated projections 182 being pressed by the pair of pressing pieces 189 of the movement operation member 157, and the projections 182 are projected. The portion 179 is drawn into the chuck claw storage recess 166. As a result, the turntable 151
The holding state with respect to the optical disc 2 placed on the placing surface 151a is released.

In the plurality of push-up members 156, the pair of pressed portions 186 are the pair of pressing piece portions 1 of the movement operating member 157.
By being pressed by 89, the pair of bearings 184 are swung about the fulcrum, and the push-up piece 183 is pushed up.
It will be projected from 61. As a result, the plurality of push-up members 156 mount the optical disk 2 on the turntable 151.
Is pushed up in a direction away from the mounting surface 151a. Further, the stopper piece portions 18 of the plurality of push-up members 156 are also provided.
5 is locked to the locking portion 167 of the turntable 151.

Next, as shown in FIG. 52, the pressing on the movement operating member 157 is released. At this time, the drop-off preventing member 190 is provided so as to project from the tip end portion of the center cap 152 in the direction in which the diameter increases, so that the optical disc 2 pushed up in the direction away from the mounting surface 151a of the turntable 151 is loaded. You can take it. As shown in FIG. 53, the fall prevention member 190 has flexibility, and thus the fall prevention member 190
By elastically deforming, the center hole 2a of the optical disc 2 can be detached from the tip portion of the center cap 152. As a result, the mounting surface 1 of the turntable 151
The optical disk 2 placed on 51a can be removed.

As described above, in the disc chucking mechanism 150, the movement operating member 157 is moved without giving a load to the conventional optical disc such that the optical disc is pushed up while being warped in the direction away from the mounting surface of the turntable. By pressing together with the center cap 152, the optical disc 2 placed on the placement surface 151a of the turntable 151 without touching the optical disc 2
Can be easily removed.

Then, the disk chucking mechanism 1
In FIG.
Since it is provided so as to project from the tip of the turntable 2 in the direction in which the diameter increases, the placement surface 151a of the turntable 151 is provided.
When removing the optical disc 2 placed on the mounting surface 1 of the turntable 151 by the plurality of push-up members 156.
Optical disc 2 pushed up in a direction away from 51a
I can accept it. In particular, when the disc drive device including the disc chucking mechanism 150 is used vertically, it is possible to reliably prevent the optical disc 2 from falling off the center cap 152.

Therefore, in this disc drive device, by including the disc chucking mechanism 150 described above, it is possible to further improve the convenience and protect the optical disc 2.

[0171]

As described in detail above, according to the present invention, by pressing the centering portion, the disc mounted on the mounting surface of the turntable can be easily removed without touching the disc. It is possible that the disc pushed up in the direction away from the mounting surface of the turntable is received by the dropout prevention portion. In particular, when used vertically, it is possible to prevent the disc from falling off from the centering portion, further improving convenience and protecting the disc.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a disk drive device shown as a first embodiment.

FIG. 2 is an exploded perspective view showing a disk chucking mechanism that constitutes the disk drive device.

FIG. 3 is a perspective plan view showing a disk chucking mechanism constituting the disk drive device as seen from a mounting surface side.

FIG. 4 is a sectional view taken along line X-X ′ in FIG.

5 is a cross-sectional view taken along the line segment Y-Y 'in FIG.

FIG. 6 is a perspective plan view of a disk chucking mechanism constituting the disk drive device as seen from the side opposite to the mounting surface.

FIG. 7 is a view for explaining the operation when the optical disc is mounted on the mounting surface of the turntable in the disc drive device, and is a perspective view showing a state where the center hole of the optical disc is fitted to the center cap. It is a top view.

8 is a cross-sectional view taken along the line segment X ₁ -X ₁ 'in FIG.

9 is a cross-sectional view taken along the line segment Y ₁ -Y ₁ ′ in FIG. 7.

FIG. 10 is a view for explaining the operation when the optical disc is mounted on the mounting surface of the turntable in the disc drive device, in which a plurality of chuck claws are pushed into the center cap. It is a perspective plan view showing.

11 is a sectional view according to in Figure 10 the line _{X 2} -X 2 '.

It is a sectional view according to FIG. 12 FIG. 10 in the line _{Y 2} -Y 2 '.

FIG. 13 is a view for explaining an operation when the optical disc is placed on the placement surface of the turntable in the disc drive device, in which a plurality of chuck claws are placed on the placement surface of the turntable. FIG. 6 is a perspective plan view showing a state of holding the inner peripheral portion of the formed optical disc.

14 is a cross-sectional view taken along the line segment X ₃ -X ₃ ′ in FIG.

It is a sectional view according to FIG. 15 in FIG. 13 line _{Y 3} -Y 3 '.

FIG. 16 is a view for explaining the operation when the optical disk mounted on the mounting surface of the turntable is removed in the disk drive device, in which a plurality of chuck claws are pushed into the center cap. FIG. 3 is a perspective plan view showing a closed state.

FIG. 17 is a sectional view taken along the line segment X ₄ -X ₄ ′ in FIG. 16.

18 is a sectional view according to the line in FIG. 16 _{Y 4} -Y 4 '.

FIG. 19 is a diagram for explaining the operation when the optical disk mounted on the mounting surface of the turntable is removed in the disk drive device, and is a perspective plan view showing a state in which the pressure on the center cap is released. Is.

20 is a cross-sectional view taken along the line segment X ₅ -X ₅ ′ in FIG.

21 is a cross-sectional view according to in Figure 19 the line _{Y 5} -Y 5 '.

FIG. 22 is a view for explaining the operation when the optical disk mounted on the mounting surface of the turntable is removed in the disk drive device, in which a plurality of chuck claws mount the optical disk on the mounting surface of the turntable. FIG. 6 is a perspective plan view showing a state in which it is pushed up in a direction away from.

FIG. 23 is a sectional view taken along the line segment X ₆ -X ₆ ′ in FIG. 22.

24 is a sectional view taken along the line segment Y ₆ -Y ₆ ′ in FIG. 22.

FIG. 25 is a view for explaining the operation when the optical disc mounted on the mounting surface of the turntable is removed in the disc drive device, in which the center hole of the optical disc is detached from the tip of the center cap. It is a perspective plan view showing a state.

FIG. 26 is a perspective view showing a disk chucking mechanism that constitutes the disk drive device shown as the second embodiment.

FIG. 27 is an exploded perspective view showing the disc chucking mechanism.

FIG. 28 is a cross-sectional view showing the disc chucking mechanism.

FIG. 29 is a view for explaining the operation when the optical disc is mounted on the mounting surface of the turntable in the disc chucking mechanism, showing a state where the center hole of the optical disc is fitted into the center cap. FIG.

FIG. 30 is a view for explaining the operation when the optical disc is mounted on the mounting surface of the turntable in the disc chucking mechanism, in which a plurality of chuck claws are pushed into the center cap. It is sectional drawing which shows a state.

FIG. 31 is a view for explaining the operation when the optical disc is placed on the placing surface of the turntable in the disc chucking mechanism, in which a plurality of chuck claws are placed on the placing surface of the turntable. FIG. 6 is a cross-sectional view showing a state in which the inner peripheral portion of the placed optical disc is held.

FIG. 32 is a view for explaining an operation when the optical disk mounted on the mounting surface of the turntable is removed in the disk chucking mechanism, in which the center cap faces the mounting surface of the turntable. It is sectional drawing which shows the state pressed and inclined.

FIG. 33 is a view for explaining the operation when the optical disc mounted on the mounting surface of the turntable is removed in the disc chucking mechanism, and is a cross-sectional view showing a state in which the pressure on the center cap is released. Is.

FIG. 34 is a view for explaining the operation when the optical disc mounted on the mounting surface of the turntable is detached in the disc chucking mechanism, in which the center hole of the optical disc is removed from the tip of the center cap. It is sectional drawing which shows the state made.

FIG. 35 is a perspective view showing a disk chucking mechanism that constitutes the disk drive device shown as the third embodiment.

FIG. 36 is an exploded perspective view showing the disc chucking mechanism.

FIG. 37 is a cross-sectional view showing the disc chucking mechanism.

FIG. 38 is a perspective view showing a state in which chuck claws are attached to a push-up member which constitutes the disc chucking mechanism.

FIG. 39 is a view for explaining the operation when the optical disc is mounted on the mounting surface of the turntable in the disc chucking mechanism, and shows a state in which the center hole of the optical disc is fitted to the center cap. FIG.

FIG. 40 is a view for explaining the operation when the optical disc is mounted on the mounting surface of the turntable in the disc chucking mechanism, in which a plurality of chuck claws are pushed into the center cap. It is sectional drawing which shows a state.

FIG. 41 is a view for explaining the operation when the optical disc is placed on the placing surface of the turntable in the disc chucking mechanism, in which a plurality of chuck claws are placed on the placing surface of the turntable. FIG. 6 is a cross-sectional view showing a state in which the inner peripheral portion of the placed optical disc is held.

FIG. 42 is a view for explaining the operation when the optical disk mounted on the mounting surface of the turntable is removed in the disk chucking mechanism, in which the center cap faces the mounting surface of the turntable. It is sectional drawing which shows the state pressed.

FIG. 43 is a view for explaining the operation when the optical disk mounted on the mounting surface of the turntable is removed in the disk chucking mechanism, and is a cross-sectional view showing a state in which the pressing on the center cap is released. Is.

FIG. 44 is a view for explaining the operation when the optical disk mounted on the mounting surface of the turntable is removed in the disk chucking mechanism, in which the center hole of the optical disk is removed from the tip of the center cap. It is sectional drawing which shows the state made.

FIG. 45 is a perspective view showing a disk chucking mechanism that constitutes the disk drive device shown as the fourth embodiment.

FIG. 46 is an exploded perspective view showing the disc chucking mechanism.

FIG. 47 is a sectional view showing the disc chucking mechanism.

FIG. 48 is a view for explaining an operation when the optical disc is mounted on the mounting surface of the turntable in the disc chucking mechanism, showing a state where the center hole of the optical disc is fitted to the center cap. FIG.

FIG. 49 is a view for explaining the operation when the optical disc is mounted on the mounting surface of the turntable in the disc chucking mechanism, in which a plurality of chuck claws are pushed into the center cap. It is sectional drawing which shows a state.

FIG. 50 is a view for explaining the operation when the optical disc is placed on the placing surface of the turntable in the disc chucking mechanism, in which a plurality of chuck claws are placed on the placing surface of the turntable. FIG. 6 is a cross-sectional view showing a state in which the inner peripheral portion of the placed optical disc is held.

FIG. 51 is a view for explaining the operation when the optical disk mounted on the mounting surface of the turntable is removed in the disk chucking mechanism, in which the movement operation member is mounted on the turntable together with the center cap. It is sectional drawing which shows the state pressed toward the surface.

FIG. 52 is a view for explaining the operation when the optical disk mounted on the mounting surface of the turntable is removed in the disk chucking mechanism, and is a cross section showing a state in which the pressing of the moving operation member is released. It is a figure.

FIG. 53 is a view for explaining the operation when the optical disc mounted on the mounting surface of the turntable is removed in the disc chucking mechanism, in which the center hole of the optical disc is removed from the tip of the center cap. It is sectional drawing which shows the state made.

FIG. 54 is a perspective plan view showing a conventional disk chucking device as viewed from the mounting surface side.

55 is a sectional view taken along the line ZZ ′ in FIG. 54.

FIG. 56 is a perspective plan view of the conventional disk chucking device as viewed from the side opposite to the mounting surface.

[Explanation of symbols]

1 disk drive device, 2 optical disks, 2a center hole, 3, 60, 100, 150 disk chucking mechanism, 4 spindle motor, 4a rotating shaft, 5 optical pickup, 6 pickup feeding mechanism, 7 chassis, 8, 61, 101, 151 turntables, 8
a, 61a, 101a, 151a Mounting surface, 9, 62,
102,152 Center cap, 10,63,10
3,153 first compression coil spring, 11, 64, 10
4,154 Chuck claws, 12, 65, 105, 155
Second compression coil spring, 13 lid, 28 protrusion,
28a first inclined surface, 28b second inclined surface, 50,
90,140,190 Fall-out prevention member, 78,129,
183 push-up piece, 106, 156 push-up member, 12
1,189 Depressing piece portion (movement operating portion), 157 movement operating member, 158 Third compression coil spring

Claims (18)

[Claims] 1. A turntable which has a mounting surface on which a disk having a central hole is mounted, and which is rotationally driven, and which is projected from the rotation center of the turntable and mounted on the mounting surface of the turntable. The centering of the disc is performed by fitting the centering portion of the placed disc into the center hole of the disc, and the centering portion is pushed into the turntable by being pressed, and the centering portion is fitted into the centering portion. A holding portion that holds the disc on the mounting surface of the turntable; a disc push-up portion that pushes the disc in a direction away from the mounting surface of the turntable by pressing the centering portion; And a drop-out prevention portion that is provided so as to project from the tip of the centering portion in the direction in which the diameter increases. Disc chucking device according to claim. 2. The drop-preventing portion is characterized in that a flexible member having a diameter larger than that of the center hole of the disc is attached to a tip portion of the centering portion.
The described disk chucking device. 3. A plurality of the holding portions are arranged on the outer peripheral portion of the centering portion at substantially equal intervals, and the disc push-up portions are arranged at positions corresponding to the respective holding portions. The disk chucking device according to claim 1, wherein the disk chucking device is a disk chucking device. 4. The holding portion has a chuck member that is protruded from an outer peripheral portion of the centering portion and is pushed into the centering member by being pressed, and the chuck member holds the disc. When it is placed on the placement surface of the turntable, it is pushed into the centering portion while slidingly contacting the inner peripheral portion of the disc, and then protrudes from the outer peripheral portion of the centering portion. The disc fitted on the centering portion is held on the placing surface of the turntable, and when the disc placed on the placing surface of the turntable is removed, by pressing the centering portion, While being in sliding contact with the inner peripheral portion of the disc, the disc is pushed into the centering portion and After releasing the holding state, it projects from the outer peripheral portion of the centering portion and releases the pressure on the centering portion to function as the disc push-up portion that pushes up the disc in the direction away from the mounting surface of the turntable. The disk chucking device according to claim 1, wherein: 5. The chuck member slides into the inner peripheral portion of the disc when the disc is mounted on the mounting surface of the turntable, so that the chuck member is moved into the centering portion. When removing the first inclined surface pressed in the pushing direction and the disk mounted on the mounting surface of the turntable, the centering is performed by sliding contact with the inner peripheral portion of the disk. 5. The disk chucking device according to claim 4, further comprising a second inclined surface that is pressed in a direction in which the portion is pressed. 6. The centering portion has a centering member that is slidable in the axial direction of the rotary shaft by being inserted into the rotary shaft of a drive motor that rotationally drives the turntable. The disk chucking device according to claim 1. 7. The push-up piece which is formed integrally with the centering portion and is pushed out from the mounting surface of the turntable by pushing and tilting the centering portion. The disk chucking device according to claim 1, further comprising a portion. 8. The holding portion includes a chuck member that is protruded from an outer peripheral portion of the centering portion and is movable into the centering portion, and the disc pushing portion is the turntable. Has a push-up member that is movable in a direction projecting from the mounting surface, and the centering portion moves the chuck member to the inside of the centering member by being pressed, and at the same time, the push-up member. 2. The disk chucking device according to claim 1, further comprising a movement operation unit that causes the turntable to project from a mounting surface of the turntable. 9. The centering portion has a centering member that is provided so as to project from the center of rotation of the turntable and is movable inside the turntable, and the holding portion includes a centering member of the centering member. The chuck member is provided so as to be protruded from the outer peripheral portion and movable inside the centering member, and the disc push-up portion is provided so as to be movable in a direction protruding from the mounting surface of the turntable. The centering member is moved to the inside of the turntable by being pressed, and the chuck member is moved to the inside of the centering member to move the lifting member to the inside of the turntable. 2. The disk chucking device according to claim 1, further comprising a movement operation member that projects from the mounting surface. Place 10. A disk chucking mechanism for chucking a disk having a center hole, a disk rotation drive mechanism for rotationally driving a disk chucked by the disk chucking mechanism, and a rotary drive for the disk rotation drive mechanism. And a recording / reproducing mechanism for recording and / or reproducing a signal to and from the disc, wherein the disc chucking mechanism has a mounting surface on which the disc is mounted, and is rotated by the disc rotation drive mechanism. The driven turntable and the center of the disc are projected by being fitted from the center of rotation of the turntable and fitted into the center hole of the disc placed on the placement surface of the turntable. , A center that is pushed into the turntable A holding portion for holding the disc fitted on the centering portion on the mounting surface of the turntable, and the centering portion to press the disc from the mounting surface of the turntable. Recording and / or recording characterized by comprising: a disc push-up portion that pushes up in a separating direction; and a drop-out prevention portion that is flexible and that projects from the tip of the centering portion in a direction in which the diameter increases Playback device. 11. The recording and recording method according to claim 10, wherein the fall-off preventing portion is formed by attaching a flexible member having a diameter larger than that of the center hole of the disc to the tip of the centering portion. And / or a playback device. 12. A plurality of the holding portions are arranged on the outer peripheral portion of the centering portion at substantially equal intervals, and the disc push-up portions are arranged at positions corresponding to the respective holding portions. A recording and / or reproducing apparatus according to claim 10. 13. The holding portion has a chuck member that is protruded from an outer peripheral portion of the centering portion and is pushed into the centering member by being pressed, and the chuck member holds the disc. When it is placed on the placement surface of the turntable, it is pushed into the centering portion while slidingly contacting the inner peripheral portion of the disc, and then protrudes from the outer peripheral portion of the centering portion. Holding the disc fitted to the centering portion on the mounting surface of the turntable, when removing the disc mounted on the mounting surface of the turntable, by pressing the centering portion, While being in sliding contact with the inner peripheral portion of the disc, the disc is pushed into the centering portion to face the disc. After releasing the holding state, it projects from the outer peripheral portion of the centering portion and releases the pressure on the centering portion, thereby functioning as the disc push-up portion that pushes up the disc in the direction away from the mounting surface of the turntable. 11. The method according to claim 10, wherein
The described recording and / or reproducing apparatus. 14. The chuck member slides into contact with the inner peripheral portion of the disc when the disc is placed on the placing surface of the turntable, and thus is brought into the centering portion. When removing the first inclined surface pressed in the pushing direction and the disk mounted on the mounting surface of the turntable, the centering is performed by sliding contact with the inner peripheral portion of the disk. The recording and / or reproducing apparatus according to claim 12, further comprising: a second inclined surface that is pressed in a direction in which the portion is pressed. 15. The disk rotation drive mechanism includes a drive motor that rotationally drives the turntable, and the centering portion is inserted into a rotation shaft of the drive motor to thereby move in an axial direction of the rotation shaft. The recording and / or reproducing apparatus according to claim 10, further comprising a centering member that is slidably provided. 16. The disc push-up portion is formed integrally with the centering portion, and the push-up piece is projected from the mounting surface of the turntable by pushing and tilting the centering portion. The recording and / or reproducing apparatus according to claim 10, further comprising a section. 17. The holding portion has a chuck member that is protruded from an outer peripheral portion of the centering portion and is movable into the centering portion, and the disc push-up portion is the turntable. Has a push-up member that is movable in a direction projecting from the mounting surface, and the centering portion moves the chuck member to the inside of the centering member by being pressed, and at the same time, the push-up member. 11. The recording and / or reproducing apparatus according to claim 10, further comprising a movement operation section that causes the turntable to project from a mounting surface of the turntable. 18. The centering portion has a centering member which is provided so as to project from a rotation center of the turntable and is movable inside the turntable, and the holding portion includes a centering member of the centering member. The chuck member is provided so as to be protruded from the outer peripheral portion and movable inside the centering member, and the disc push-up portion is provided so as to be movable in a direction protruding from the mounting surface of the turntable. The centering member is moved to the inside of the turntable by being pressed, and the chuck member is moved to the inside of the centering member to move the lifting member to the inside of the turntable. The recording and / or reproducing apparatus according to claim 10, further comprising a movement operation member that projects from the mounting surface. apparatus.