JP3825457B2 - Disk unit - Google Patents

Description

  The present invention relates to a disk device that records or reproduces a disk-shaped recording medium such as a CD or a DVD, and more particularly to thinning a disk device used as a peripheral device for home video equipment or a computer.

In response to the downsizing and thinning of computers, there is an increasing demand for downsizing and thinning of disk devices such as DVDs. In general, in a disk device that records / reproduces a disk-shaped recording medium such as a DVD, in order to replace the disk, a means for mounting / releasing the disk on the turntable on which the disk is mounted is required. Therefore, there is a need for a disk device having an automatic disk mounting means.
Conventionally, as an automatic loading means for this disk, after the disk is transported by a transport mechanism, the disk is sandwiched from above and below by a turntable on the lower surface of the disk and a disk holding clamp member called a clamper above the disk. Was holding.
However, in the conventional disk apparatus having the above-described configuration, the disk apparatus can be thinned because there is a thick clamp member (clamper) provided above the disk when the disk is automatically mounted. It had the problem of being difficult.
For example, Patent Document 1 describes a small and thin disk device including an automatic disk mounting mechanism that does not require a clamp member (clamper) above the disk.
As shown in FIG. 12, such a disk device includes a moving mechanism 101 that moves the turntable 100 that can rotate up and down, moves the turntable 100 upward (direction A), and moves on the turntable 100 when moving. The disk D is pressed against the disk locking contact member 103 and the disk D is relatively moved to the turntable 100 side, and the disk D is held by the holding mechanism 106 such as a claw 105 provided on the rotating shaft 104. The turntable 100 is configured to be held without manual intervention.
JP 2002-352794 A

  Some discs D such as DVDs sometimes have burrs or dents in the bonding part above the disk due to defects in the manufacturing process, and burrs or dents in the bonding part above the disk. However, when it is mounted on the above-described conventional automatic disk mounting mechanism, the innermost movement of the disk is partially obstructed due to burrs, dents in the bonded portion, etc. (X portion) and held by the claw 105 or the like. There is a problem that the mechanism may not hold the disk D reliably.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a disk device capable of reducing the thickness of the disk device and enabling reliable automatic mounting of the disk even if there are burrs or dents in the bonded portion on the inner peripheral side of the disk. To do.

The disc device of the present invention according to claim 1 has a ring-shaped disc receiving surface for placing a disc having a center hole, and is rotatable on a rotation axis, and the turntable is placed on the turntable. A disk holding mechanism for holding a disk, a disk locking contact member having a hole that does not contact the disk holding mechanism, and a protrusion projecting toward the turntable on the outer periphery of the hole; A disk device having a moving mechanism for relatively approaching and separating the disk locking contact member and the turntable, wherein the protrusion is formed at a position facing the disk receiving surface. And a second deforming portion formed on the inner peripheral side of the disc receiving surface, and the protrusion formed by the second deforming portion is the most toward the turntable side. And out configuration that, an abutment member for said disk locking is formed on the lid, the inner peripheral end portion of the projection formed by the second deformation portion, is protruded to the opposite side of the turntable It is characterized by.
According to a second aspect of the present invention, in the disk device according to the first aspect, the first projecting portion is formed by the first deforming portion, the second projecting portion is formed by the second deforming portion, and the second projecting portion is formed. The protrusion is configured to protrude to the turntable side from the first protrusion.
According to a third aspect of the present invention, there is provided a disc device according to the present invention, wherein the disc device has a ring-shaped disc receiving surface for placing a disc having a central hole, and is rotatable around a rotation axis. A disk holding mechanism for holding a disk, a disk locking contact member having a hole that does not contact the disk holding mechanism, and a protrusion projecting toward the turntable on the outer periphery of the hole; A disk device having a moving mechanism for relatively approaching and separating the disk locking contact member and the turntable, wherein the protrusion is formed at a position facing the disk receiving surface. And a second deforming portion formed on the inner peripheral side of the disc receiving surface, and the protrusion formed by the second deforming portion is the most toward the turntable side. The disk locking contact member is formed on the lid, and the moving mechanism moves the turntable relative to the disk locking contact member by raising and lowering the turntable. It is characterized by that.
According to a fourth aspect of the present invention, there is provided a disk device according to the present invention, wherein the disk device has a ring-shaped disk receiving surface for placing a disk having a central hole, and is rotatable around a rotation axis. A disk holding mechanism for holding the disk, a disk locking contact member having a hole that does not contact the disk holding mechanism, and a protrusion projecting toward the turntable on the outer periphery of the hole; A disk device having a moving mechanism for relatively approaching and separating the disk locking contact member and the turntable, wherein the protrusion is formed at a position facing the disk receiving surface. And a second protrusion formed on the inner peripheral side of the disk receiving surface, the second protrusion protrudes to the turntable side than the first protrusion, The disk locking abutment member formed on the lid, the moving mechanism by lifting the turntable, characterized in that moving the turntable relative to the abutment member for said disk locking.
According to a fifth aspect of the present invention, in the disk device according to any one of the first to fourth aspects, the protrusion is formed in a ring shape.
According to a sixth aspect of the present invention, in the disk device according to the fifth aspect, the radial width of the first protrusion is larger than the radial width of the second protrusion. .

  According to the disk device of the present invention, the disk device is deformed in two stages at the outer peripheral side of the disk holding mechanism and at the position opposite the rotating shaft side of the disk receiving surface of the turntable, and has a two-stage protrusion toward the disk. Because it has a stop contact member, even if there are burrs or dents on the inner periphery of the disc as in the past, the disc can be moved and held securely on the turntable side. Automatic mounting is possible, and the thickness of the clamper is not required, so that the automatic attaching / detaching operation disk device can be thinned.

The disc device according to the first embodiment of the present invention includes a first deforming portion having a protrusion formed at a position facing the disc receiving surface and a second deforming portion formed on the inner peripheral side of the disc receiving surface. The protrusion formed by the second deforming portion protrudes most toward the turntable side, the disk locking contact member is formed on the lid, and the protrusion formed by the second deforming portion The inner peripheral end is projected to the opposite side of the turntable. According to the present embodiment, since the protrusion is formed by two-stage deformation at the outer peripheral side of the disk holding mechanism and at the position opposite the rotating shaft side of the disk receiving surface of the turntable, Even if there are burrs or warps on the peripheral side, the disk can be reliably moved and held on the turntable side. Further, the rigidity of the protrusion can be increased, and the disk can be pressed with a strong force.
According to a second embodiment of the present invention, in the disk device according to the first embodiment, the first projecting portion is formed by the first deforming portion, the second projecting portion is formed by the second deforming portion, and the second projecting portion is formed. The protrusion protrudes from the first protrusion to the turntable side. According to the present embodiment, the disk is securely attached to the disk holding mechanism in order to hold the disk by the first protrusion and the disk receiving surface and to prevent the inner peripheral surface of the disk from being lifted by the second protrusion. be able to.
The disc device according to the third embodiment of the present invention includes a first deforming portion having a protrusion formed at a position facing the disc receiving surface and a second deforming portion formed on the inner peripheral side of the disc receiving surface. The projecting portion formed by the second deforming portion protrudes most toward the turntable, the disc locking contact member is formed on the lid, and the moving mechanism moves the turntable up and down to The turntable is moved with respect to the locking contact member. According to the present embodiment, since the protrusion is formed by two-stage deformation at the outer peripheral side of the disk holding mechanism and at the position opposite the rotating shaft side of the disk receiving surface of the turntable, Even if there are burrs or warps on the peripheral side, the disk can be reliably moved and held on the turntable side. Further, the automatic attachment / detachment operation disk device can be thinned.
The disk device according to the fourth embodiment of the present invention includes a first protrusion formed at a position facing the disk receiving surface and a second protrusion formed on the inner peripheral side of the disk receiving surface. Configured, the second protrusion protrudes more toward the turntable than the first protrusion, the disk locking contact member is formed on the lid, and the moving mechanism lifts and lowers the turntable to lock the disk. The turntable is moved with respect to the contact member. According to the present embodiment, the disk is held by the first protrusion and the disk receiving surface, and the inner surface of the disk is prevented from being lifted by the second protrusion. Even if there is a warp, the disk can be reliably moved to the turntable side and held. Further, the automatic attachment / detachment operation disk device can be thinned.
In the fifth embodiment of the present invention, the protrusions are formed in a ring shape in the disk devices according to the first to fourth embodiments. According to the present embodiment, the disk can be held more reliably.
The sixth embodiment of the present invention is such that in the disk device according to the fifth embodiment, the radial width of the first protrusion is larger than the radial width of the second protrusion. According to this embodiment, by making the width of the first protrusion larger than the width of the second protrusion, the displacement of the second protrusion can be ensured, and the width of the second protrusion is set to the width of the first protrusion. By making it smaller than the width, it is possible to concentrate the pressing force on the disk at the second protrusion.

FIG. 1 is a cross-sectional view of a principal part showing the configuration of a disk device 1000 according to an embodiment of the present invention, and FIG. 2 is a top view of a lid body in which a disk locking contact member is formed.
The disk device 1000 includes a turntable 10 and a disk holding mechanism 20 disposed on the turntable 10 between the base body 1 and the disk locking contact member 30.
The turntable 10 has a disk receiving surface 11 on which the disk 40 is placed, and is rotatable around the rotation axis A.
The disc holding mechanism 20 includes a hub portion 21, a holding claw 22, and an elastic member 23, and holds the disc 40 on the turntable 10 so that the disc 40 can rotate around the rotation axis A. And a second state (a state in which the disk 40 is positioned above the holding claw 22 in FIG. 1) different from the first state. The hub portion 21 is fitted into the center hole of the disc 40, and the disc 40 is held on the turntable 10 by the holding claw 22 and the elastic member 23 that biases the holding claw 22.
In this embodiment, the disk locking contact member 30 is provided on a part of the upper top plate that forms the outer shell of the disk device 1000, is disposed above the disk 40, and contacts the disk holding mechanism 20. The first deforming portion 32 and the second deforming portion are provided in two stages at a position on the outer peripheral side with respect to the disc 40 from the disc holding mechanism 20 and on the rotational axis A side from the disc receiving surface 11 of the turntable 10. Like the portion 33, it is deformed by a molding process such as a drawing process and has two stages of protrusions 34 and 35 toward the disk 40. The two-stage protrusion includes a first protrusion 34 and a second protrusion 35 formed in the vicinity of the hole 31. Further, these protrusions 34 and 35 have a ring shape and come into contact with a non-recording area 41 which is an inner peripheral area of the disc 40. In addition, the 1st protrusion 34 and the 2nd protrusion 35 are good also as a taper-shaped structure toward the outer peripheral direction from the inner peripheral side. Further, the ring shape of the protrusion 35 does not necessarily have to be configured continuously.

  The disk device 1000 includes a moving mechanism 50 that moves the turntable 10 relative to the disk locking contact member 30. The moving mechanism 50 may be configured such that the turntable 10 moves, or may be configured such that the disk locking contact member 30 moves. Alternatively, both the turntable 10 and the disk locking contact member 30 may move. The moving mechanism 50 is an elevating means for elevating and lowering the turntable 10, and in this embodiment, the moving mechanism 50 rotates up and down around a fulcrum 51.

Next, the lid body in which the disk locking contact member of the apparatus is formed will be described with reference to FIG. 1 corresponds to a cross section taken along line BB in FIG.
A plurality of screw holes 2 are provided in the outer edge portion of the disk locking contact member 30, and the disk locking contact member 30 is attached to the base body 1 by screws.
A hole 31 is provided at the center of the disk locking contact member 30. The hole 31 is a circular opening having a larger radius than the center hole of the disk 40. Accordingly, the opening is larger than the disk holding mechanism 20 that fits into the center hole of the disk 40.
On the outer periphery of the hole 31, ring-shaped protrusions 34 and 35 are formed so as to protrude toward the base body 1 side. The ring-shaped protrusions 34 and 35 are configured by a second protrusion 35 provided on the outer periphery of the hole 31 and a first protrusion 34 provided on the outer periphery of the second protrusion 35. The protruding height is formed higher than the protruding height of the first protrusion 34. Further, the radial width of the first protrusion 34 is formed to be larger than the radial width of the second protrusion 35. Thus, the double protrusions 34 and 35 can increase the rigidity of the disk locking contact member 30 against bending, and the disk locking contact member 30 is deformed when the disk is chucked. However, since the second protrusion 35 is higher than the first protrusion 34, the disk can be surely pressed and a stable chucking operation can be performed. Further, the hole 31 is provided with a throttle portion 4 having a tapered shape from the first protrusion 34 toward the disc insertion opening 3 side. A convex guide is formed on the base body 1 side by the throttle portion 4.

The disk locking contact member 30 is formed with a plurality of throttle portions 4, 5, 6, and these throttle portions 4, 5, 6 form a convex guide on the base body 1 side.
Further, at the end portion on the front surface side of the disk locking contact member 30, the first throttle groove 7 having a predetermined length protruding toward the base body 1 side and the predetermined end protruding toward the opposite side of the first throttle groove 7 are provided. A second throttle groove 8 having a length is formed adjacent to each other. The first throttle groove 7 and the second throttle groove 8 are continuous grooves having a length corresponding to the width of the disk. Here, the 1st aperture groove 7 is formed so that it may become high gradually toward an edge part from a center part.
These throttle portions 4, 5, 6 and the throttle grooves 7, 8 are outside the outer peripheral end of the disc 40 in a state where it is mounted on the disc holding mechanism 20, and closer to the disc insertion port 3 side than the hole 31. Provided. The disc 40 inserted from the disc insertion port 3 is guided by the convex guide formed by the throttle portions 4, 5, 6 and the throttle groove 7. Further, the strength of the disk locking contact member 30 is enhanced by the throttle portions 4, 5, 6 and the throttle grooves 7, 8. The diaphragm unit 4 and the diaphragm unit 5 may be one continuous diaphragm, but the strength of the disk locking contact member 30 can be further increased by dividing the diaphragm unit 4 and the diaphragm unit 5 into a plurality of diaphragms.

Further, in this embodiment, a first throttle groove 7 having a predetermined length and a side opposite to the first throttle groove 7 are projected at the front surface side end portion of the disk locking contact member 30 having no side wall. By forming the second throttle groove 8 having a predetermined length, it is possible to increase the rigidity against bending of the front surface side end of the disk locking contact member 30. In particular, the chucking operation of the disk 40 can be stably performed by increasing the rigidity against bending. Further, in this embodiment, by forming the groove height at the end portion of the first throttle groove 7 higher than the center portion, the rigidity against bending is increased as compared with the case of forming the groove having the same height. In addition, since the disc can be guided at both ends of the first aperture groove 7 when the disc 40 is inserted or ejected, a smooth operation can be performed without damaging the recording surface of the disc 40. it can.
The disk locking contact member 30 is made of an aluminum alloy, and the entire inner peripheral surface of the disk locking contact member 30 is coated with a fluorine-based coating containing urethane beads. The coating may be applied only to the contact surface of the protrusion 35, the throttle portions 4, 5, 6 and the first throttle groove 7 with the disk 40. As a coating material, a coating material in which a urethane resin having a bead diameter of 20 microns is blended with fluorine having a blending ratio of 5% with respect to the urethane resin and silicon having a blending ratio with respect to the urethane resin of 1.0 to 1.5% is used. It is preferable. Moreover, 0.2-0.6 are preferable and, as for the friction coefficient of a coating material, 0.55 or less are more preferable.

Next, the operation of this embodiment will be described with reference to FIGS.
3 is a diagram showing a state before the disc is mounted on the turntable in the disc device according to the embodiment of the present invention, FIG. 4 is a diagram showing a start state of mounting the disc on the turntable, and FIG. FIG. 6 is a view showing a state in which the disk is in the middle of mounting on the turntable and the disk is in contact with the first protrusion of the disk locking contact member. FIG. FIG. 7 is a view showing a state where the disk is in contact with the first and second protrusions of the disk locking contact member, and FIG. 7 is a state after the disk is mounted on the turntable. FIG. 6 is a diagram showing a state where a disc is in a rotatable position.
As shown in FIG. 3, the moving mechanism 50 holds the turntable 10 so that the disk locking contact member 30 contacts the disk 40 when the disk holding mechanism 20 is in the second state. It is moved in the direction of arrow B relative to the contact member 30 for use. Next, as shown in FIGS. 4 to 5, the moving mechanism 50 is further turned from the state in which the first protrusion 34 of the disk locking contact member 30 is in contact with the disk 40 as shown in FIG. By moving the table 10 relative to the disk locking contact member 30, the first protrusion 34 and the second protrusion 35 of the disk locking contact member 30 move the disk 40 to the turntable 10. The disk holding mechanism 20 changes from the second state to the first state. Then, as shown in FIG. 6, when the state of the disk holding mechanism 20 becomes the first state, the moving mechanism 50 slightly lowers the turntable 10 to the reproduction position.
In this state, the disk locking contact member 30 does not contact the disk 40, but the lower surfaces of the first protrusion 34 and the second protrusion 35 of the disk locking contact member 30 are the disks. A known protective film such as urethane coating is provided so as not to damage 40.
Among the above-described states of the locking contact member 30, the state shown in FIGS. 6 and 7 in which the disk 40 is completely held by the disk holding mechanism 20 is the first state, and the other states shown in FIGS. The state 5 is the second state.

As shown in FIG. 1, in this embodiment, the disk 40 positioned above the turntable 10 is moved upward with the first protrusion 34 of the disk locking contact member 30 by the upward movement of the turntable 10. The second protrusion 35 abuts on the disk 40, and the moving mechanism 50 moves the turntable 10 relative to the disk locking abutment member 30. The first protrusion 34 and the second protrusion 35 will press the disk 40 relative to the turntable 10 side, and even if there is a burr or a dent in the bonded part on the disk 40, the first protrusion 34, The second protrusion 35 reliably changes the state of the disk holding mechanism 20 from the second state to the first state.
That is, when the disk 40 is relatively pressed toward the turntable 10, the holding claw 22 once moves backward in the direction of arrow C against the urging force of the elastic member 23 that urges the holding claw 22, and then the disk When 40 reaches the receiving surface 11 of the turntable 10, the holding claw 22 returns to the original state by the urging force of the elastic member 23, and the holding claw 22 enters the first state in which the disk 40 is held.
Thereby, the mounting of the disk 40 to the turntable 10 is completed.

In the present embodiment, the disc holding mechanism 20 is configured to hold and fix the disc 40 to the turntable 10 by a plurality of holding claws 22, but is not limited to this, for example, a spherical member, It may be held and fixed with a ring-shaped elastic member or the like.
Further, in the embodiment of the present invention, the turntable 10 is configured to remain horizontal at the reproduction position of the turntable 10, so that the disk locking contact member 30 and the disk 40 are in contact with each other. In the state, the turntable 10 is inclined at an angle θ with respect to the disk locking contact member 30 (the turntable 10 is lifted up and down along an arcuate locus), but in another form, the turntable 10 is vertical. It is also possible to take a mechanism that moves up and down. When taking a vertically moving mechanism, the force required to pull the holding claw 22 in the direction of arrow C is applied to the plurality of holding claws 22 at the same time. The force required to operate the disk holding mechanism 20 can be reduced.

Next, another embodiment will be described with reference to FIGS.
8 and 9 are cross-sectional views of the main part of a disk locking contact member according to another embodiment, FIG. 8 is a cross-sectional view corresponding to the line BB in FIG. 2, and FIG. 9 is A in FIG. It is sectional drawing equivalent to -A line.
The disc locking contact member 30 includes a first deforming portion 32 formed as an inclined surface at a position facing the disc receiving surface, and a second deforming portion 33 formed as an aperture groove on the inner peripheral side of the disc receiving surface. The first projecting portion 34 is formed by the first deforming portion 32, and the second projecting portion 35 is formed by the second deforming portion 33. And the 2nd protrusion 35 is made to protrude to the turntable side rather than the 1st protrusion 34, and makes the radial width of the 1st protrusion 34 larger than the radial width of the 2nd protrusion 35. Yes. In addition, by configuring the inner peripheral end of the second protrusion 35 formed by the second deformable portion 33 to protrude to the opposite side of the turntable, the rigidity of the second protrusion 35 can be increased. The disk 40 can be pressed with a strong force.

10 and 11 are cross-sectional views of the main part of a disk locking contact member according to still another embodiment. FIG. 10 is a cross-sectional view corresponding to the line BB in FIG. 2, and FIG. It is sectional drawing equivalent to an AA line.
The disc locking contact member 30 includes a first deforming portion 32 formed as an inclined surface at a position facing the disc receiving surface, and an angle different from that of the first deforming portion 32 on the inner peripheral side of the disc receiving surface. A second deformable portion 33 formed by projecting the flat portion and the turntable to the opposite side, and the second deformable portion 32 and the second deformable portion 33 are the second most protruded to the turntable side. A protrusion 35 is formed.

  The present invention relates to a disk device for recording or reproducing a disk-shaped recording medium such as a CD or a DVD. Even if there are burrs or dents in the bonded portion on the inner peripheral side of the disk as in the prior art, the disk is securely turned. The disk can be moved to the side and a reliable automatic mounting operation of the disk becomes possible, so that it can be used for a disk device that needs to be thinned and is used as a peripheral device for home video equipment or a computer.

Sectional drawing which shows the principal part of the structure of the disc apparatus in embodiment of this invention Top view of a lid formed with a disk locking contact member of the same device The figure which shows the state before mounting | wearing a disk with a turntable in the disk apparatus in embodiment of this invention. The figure which shows the state of the start of mounting | wearing with a disk on a turntable in the disk apparatus in embodiment of this invention. The figure which shows the state which is in the middle of mounting | wearing the disk with a turntable, and the disk is contacting the 1st protrusion of the contact member for disk locking in the disk apparatus in embodiment of this invention. In the disk device according to the embodiment of the present invention, a state after the disk is mounted on the turntable and the disk is in contact with the first and second protrusions of the disk locking contact member is shown. Figure The figure which shows the state which is in the position which can be rotated after the disc was mounted in the turntable in the disc apparatus in embodiment of this invention. FIG. 5 is a cross-sectional view of a main part of a contact member for locking a disk according to another embodiment of the present invention, corresponding to the line BB in FIG. 2. FIG. 5 is a cross-sectional view of a main part of a contact member for disc locking according to another embodiment of the present invention, corresponding to the line AA in FIG. 2. FIG. 6 is a cross-sectional view of a main part of a contact member for locking a disc according to still another embodiment of the present invention, corresponding to the line BB in FIG. 2. FIG. 6 is a cross-sectional view of a main part of a contact member for locking a disc according to still another embodiment of the present invention, corresponding to the line AA in FIG. Sectional view of a conventional disk device for explaining the background art

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Turntable 20 Disc holding mechanism 22 Holding claw 30 Disc locking contact member 31 Hole 34, 35 Protruding portion 32, 33 Deformation portion 40 Disc 50 Moving mechanism

Claims (6)

A turntable having a ring-shaped disc receiving surface for placing a disc having a central hole and rotatable around a rotation axis;
A disk holding mechanism for holding the disk on the turntable;
A disk locking contact member having a hole that does not contact the disk holding mechanism, and a protrusion projecting toward the turntable on the outer periphery of the hole;
A disk device having a moving mechanism for relatively approaching and separating the disk locking contact member and the turntable,
The protrusion is constituted by a first deforming portion formed at a position facing the disc receiving surface and a second deforming portion formed on the inner peripheral side of the disc receiving surface,
The protruding portion formed by the second deforming portion protrudes most toward the turntable side,
Forming the disk locking contact member on the lid;
The disk device according to claim 1, wherein an inner peripheral end portion of the protrusion formed by the second deforming portion protrudes to the opposite side of the turntable.   A first projecting portion formed by the first deforming portion, a second projecting portion formed by the second deforming portion, and the second projecting portion projecting toward the turntable from the first projecting portion; The disk device according to claim 1, wherein the disk device is a disk drive. A turntable having a ring-shaped disc receiving surface for placing a disc having a central hole and rotatable around a rotation axis;
A disk holding mechanism for holding the disk on the turntable;
A disk locking contact member having a hole that does not contact the disk holding mechanism, and a protrusion projecting toward the turntable on the outer periphery of the hole;
A disk device having a moving mechanism for relatively approaching and separating the disk locking contact member and the turntable,
The protrusion is constituted by a first deforming portion formed at a position facing the disc receiving surface and a second deforming portion formed on the inner peripheral side of the disc receiving surface,
The protruding portion formed by the second deforming portion protrudes most toward the turntable side,
Forming the disk locking contact member on the lid;
The disk device according to claim 1, wherein the moving mechanism moves the turntable relative to the disk locking contact member by moving the turntable up and down. A turntable having a ring-shaped disc receiving surface for placing a disc having a central hole and rotatable around a rotation axis;
A disk holding mechanism for holding the disk on the turntable;
A disk locking contact member having a hole that does not contact the disk holding mechanism, and a protrusion projecting toward the turntable on the outer periphery of the hole;
A disk device having a moving mechanism for relatively approaching and separating the disk locking contact member and the turntable,
The protrusion is constituted by a first protrusion formed at a position facing the disk receiving surface and a second protrusion formed on the inner peripheral side of the disk receiving surface,
The second protrusion is protruded to the turntable side from the first protrusion,
Forming the disk locking contact member on the lid;
The disk device according to claim 1, wherein the moving mechanism moves the turntable relative to the disk locking contact member by moving the turntable up and down.   5. The disk apparatus according to claim 1, wherein the protrusion is formed in a ring shape.   6. The disk apparatus according to claim 5, wherein the radial width of the first protrusion is larger than the radial width of the second protrusion.

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