JP2004178691A - Disk driving device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable performing recording and reproducing of high characteristics by suppressing the occurrence of vibration of a rotary shaft or the like while reducing the number of parts and the number of processes of assembling and reducing a manufacturing cost. <P>SOLUTION: An opening part 23 facing a disk holding mechanism 24 to the outside is formed, while an elastic piece 42 pressing a rotary shaft 11 of the spindle motor 9 in the direction of the shaft is formed integrally at a cover plate 25 closing this opening part 23. The rotary shaft 11 is rotation-driven in the state in which a disk 2 attached to a turn table 13 is stably rotated by that occurrence of vibration of in the direction of the shaft is suppressed even if the disk is rotated at a high speed by loading a load in the direction of the shaft by the elastic pieces 42. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a disk drive device that holds and rotates a disk that is a disk-shaped recording medium such as an optical disk or a magneto-optical disk mounted on a disk recording / reproducing device that records and reproduces information signals and the like.
[0002]
[Prior art]
Discs have various outer diameters and recording structures, such as compact discs (CDs), minidiscs (CDs), multipurpose digital discs (DVDs), and phase-changeable discs that can be recorded and reproduced, which are used exclusively for reproduction. Are provided, and the reproduction of information signals and the like or the recording of information signals and the like loaded and recorded in a disk recording / reproducing apparatus are performed. A disc recording / reproducing apparatus generally includes a loading mechanism for loading a loaded disc into a recording / reproducing unit, a turntable mechanism having a turntable for mounting and holding the disc in the recording / reproducing unit, and a spindle motor for rotating the turntable. An optical pickup for reproducing information signals and the like recorded by scanning the main surface of the disk driven or rotated and driven, and a recording and reproducing mechanism for recording the information signals and the like are provided.
[0003]
In the disk drive mechanism, generally, a spindle motor arranges a large number of coils on a control board so as to be arranged on the same circumference, and a bearing cylinder member is attached to the control board at the center of the coil group. A rotary shaft is rotatably mounted on the bearing cylinder member. In the spindle motor, a substantially cup-shaped rotor having a large number of stators extending on the outer periphery of the coil group is fixed on the rotating shaft, and the center of the turntable is fixed to the tip of the rotating shaft. (For example, see Patent Document 1).
[0004]
On the other hand, in a disk drive mechanism, when a disk is loaded alone such as a CD, a fitting projection formed at the center of the turntable is fitted into the center hole of the disk to position and hold the disk. . In the disk drive mechanism, a disk clamper is provided above the turntable so as to face the fitting protrusion, and the disk is clamped between the disk clamper and the fitting protrusion.
[0005]
By the way, in the disk drive mechanism, when the disk is driven to rotate at high speed, an axial vibration is generated on the rotation axis of the spindle motor, so that the turntable vibrates and the focus adjustment of the optical pickup cannot be accurately performed. May occur. Therefore, in the disk drive mechanism, for example, by using a spindle motor in which the height position of the rotor and the stator are shifted, an axial load is applied to the rotor, that is, the rotating shaft by the attraction force of the rotor magnet. I have. However, even with such a disk drive mechanism, it has been difficult to obtain a load sufficient to suppress generation of vibration when the disk is rotated at high speed.
[0006]
[Patent Document 1]
JP-A-11-243657
[Problems to be solved by the invention]
Various measures have been taken in the disk drive mechanism in order to solve the above-mentioned problems. For example, a dedicated magnet for generating an axial load on the rotor is provided. Further, in the disk drive mechanism, a disk clamper for holding the disk in opposition to the fitting convex portion is disposed at a position above the turntable, for example, on the cover member side that is combined with the case main body to form a housing. The disk clamper is pressed against the turntable by magnetic means or elastic means. In the disk drive mechanism, by providing a magnet or elastic member in this way and applying an axial load to the rotating shaft of the spindle motor, it is possible to suppress the occurrence of vibration even when the disk is driven at high speed. Is achieved.
[0008]
Therefore, the conventional disk drive mechanism requires a magnet and an elastic member, and also requires man-hours for assembling these members, resulting in a problem of high cost. Further, in the conventional disk drive mechanism, there is a problem that it is necessary to secure a space for attaching the above-described magnet and the elastic member, so that the size is increased. Further, in the conventional disk drive mechanism, for example, an elastic member is firmly attached, and an attaching member formed with sufficient mechanical strength is provided so that the elastic force acts on the disk clamper. There was a problem such as an increase in size.
[0009]
Accordingly, an object of the present invention is to provide a disk drive device capable of reducing the number of parts and assembling man-hours and reducing the cost while reducing the occurrence of vibration and the like so that high-performance recording and reproduction can be performed. Things.
[0010]
[Means for Solving the Problems]
A disk drive device according to the present invention that achieves the above-described object includes a housing formed by combining a case body and a cover member, a spindle motor, and a turntable that holds a loaded disk fixed to a rotation shaft thereof. And a disk holding mechanism that is assembled to the cover member and cooperates with the turntable to hold the center of the disk. In the disk drive device, an opening for exposing the disk holding mechanism to the outside is formed in the cover member, and a cover plate for closing the opening is provided. In the disk drive, an elastic piece for pressing the disk holding mechanism in the axial direction is integrally formed on the cover plate.
[0011]
According to the disk drive device of the present invention configured as described above, the disk holding mechanism is pressed in the axial direction by the elastic piece, and the axial load is applied to the rotating shaft of the spindle motor via the disk holding mechanism. Is loaded. According to the disk drive device, for example, even when the disk is rotated at a high speed, the axial load from the elastic piece is applied to the rotary shaft, so that the axial vibration of the rotary shaft is suppressed. Therefore, according to the disk drive device, the disk is rotationally driven in a stable state, and high recording / reproducing characteristics are achieved, and the generation of vibration noise and the like is reduced. According to the disk drive device, the elastic piece is integrally formed using the cover plate that closes the opening formed for adjusting the assembly of the disk holding mechanism, so that the number of parts and the number of assembly steps do not increase. Thus, the cost can be reduced.
[0012]
Further, in the disk drive device according to the present invention, the elastic piece is formed by bending a rectangular piece portion left uncut by a substantially U-shaped notch groove formed in the cover plate corresponding to the disk holding mechanism. It becomes. According to the disk drive device, the elastic piece can be formed by a pressing process capable of performing the outer shape punching process, the groove punching process, and the bending process on the metal plate using the same die. Cost reduction is achieved.
[0013]
Further, in the disk drive device according to the present invention, the disk holding mechanism is formed to have a diameter larger than the opening, and is combined with the clamping member from the outer surface side of the cover member. A disk clamper which is integrated with the clamping member so as to sandwich the opening peripheral wall of the opening from the inner surface side and is rotatably combined with the cover member, and a magnet mounted on the disk clamper and provided on the turntable mechanism side It is composed of a magnetic washer member for holding the center of the disk between the disk clamper and the turntable by being sucked. The disk drive device has a locking projection integrally formed on the clamping member, which is located at the center of the inner surface and penetrates the disk clamper and regulates the rotation axis of the spindle motor in the axial direction. A receiving projection which is pressed against the elastic piece in the axial direction by contacting the elastic piece is integrally formed.
[0014]
According to the disk drive device of the present invention configured as described above, the integrated clamping member and the disk clamper are moved to the center of the disk by the magnetic force applied between the magnet and the magnetic washer member. By firmly holding the disc on the turntable, stable rotation of the disc is performed. According to the disk drive device, even when the disk is driven to rotate at high speed, the axial load from the elastic piece is applied to the rotating shaft via the clamping member in which the locking projection and the receiving projection are integrally formed. Since the load is applied, the vibration of the rotating shaft in the axial direction is suppressed. Therefore, according to the disk drive device, the disk is rotationally driven in a stable state, and high recording / reproducing characteristics are achieved, and the generation of vibration noise and the like is reduced.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a recording / reproducing apparatus 1 shown in the drawings as an embodiment of the present invention will be described in detail. The recording / reproducing apparatus 1 uses a disk 2 such as a CD or CD-R that is directly handled alone without being housed in a cartridge. The recording / reproducing apparatus 1 records and reproduces information signals and the like by holding and rotating the center hole 3 formed in the disk 2 as described later in detail.
[0016]
As shown in FIG. 1, the recording / reproducing apparatus 1 has a case body 5 formed in a substantially thin box shape with an open front surface and a ceiling, and a cover assembled by closing the ceiling of the case body 5. The housing 4 is constituted by the member 6. Although not described in detail, the recording / reproducing apparatus 1 is provided with a disk tray 7 on the front surface of the housing 4 so as to be freely accessible, and the disk 2 is loaded into the disk tray 7 as shown in FIG. The recording / reproducing apparatus 1 loads the disc 2 to a recording / reproducing unit, whose details are omitted, by pulling the disc tray 7 into the housing 4.
[0017]
In the recording / reproducing apparatus 1, a control board 8 is provided on a case body 5, and a spindle motor 9, an optical pickup 10, or a magnetic head (not shown) is mounted on the control board 8, although details are omitted. Although not described in detail, the optical pickup 10 controls a focus or a tracking of the objective lens based on a control signal based on a control signal, and a laser light source, an optical system including an objective lens, a light detection unit for detecting return light from the disk 2. It has a control mechanism and the like.
[0018]
As shown in FIG. 2, the recording / reproducing apparatus 1 includes a spindle motor 9, a disk support member 12 fixed to the tip of a rotating shaft 11, a turntable 13 attached to the disk support member 12, and a disk support member. A disk drive mechanism 15 is constituted by the magnet 14 and the like assembled to the disk 12. The disk drive mechanism 15 positions and holds the disk 2 loaded on the recording / reproducing unit as described later, but is pushed upward by a rotating mechanism whose details are omitted.
[0019]
Although not described in detail, the spindle motor 9 has a control board 8 on which a number of coils are arranged on the same circumference and a rotor provided with a number of magnets on the outer periphery of the coil group rotates. It can be freely combined. The spindle motor 9 is configured such that a bearing cylinder member is mounted on the control board 8 at the center of the coil group, and a rotary shaft 11 having a rotor integrated with the bearing cylinder member is rotatably mounted on the shaft. The spindle motor 9 is axially mounted with a certain amount of play in the axial direction so that the rotating shaft 11 is prevented from being pulled out of the bearing cylinder member and performs a smooth rotation operation.
[0020]
As shown in FIG. 2, the disk support member 12 includes a cylindrical shaft portion 16, a disk fitting portion 17, and a turntable mounting portion 18 integrally formed. The disk support member 12 is integrated with the rotary shaft 11 by press-fitting and fixing the tip of the rotary shaft 11 into the shaft hole 19 of the cylindrical shaft portion 16. The disk support member 12 has a disk fitting portion 17 integrally formed around the circumference of the cylindrical shaft portion 16, from a distal end portion having a diameter slightly smaller than the inner diameter of the center hole 3 of the disk 2 toward the base end side. It gradually becomes larger in diameter.
[0021]
An annular magnet mounting groove 20 is formed in the disk fitting portion 17 at the distal end surface where the shaft hole 19 opens, and a ring-shaped magnet for clamping the disk 2 with mag heat as described later is formed in the magnet mounting groove 20 as described later. Are joined and attached so as to form the same surface as the front end surface. The magnet mounting groove 20 may be a plurality of arc-shaped concave grooves formed on the same circumference around the shaft hole 19, and the arc-shaped magnet 14 is mounted on each of the grooves. The disk fitting portion 17 is appropriately formed with a meat steal portion 21 inside the base end portion, and the meat steal portion 21 imparts a diameter reducing behavior to the base end portion.
[0022]
When the disc 2 is loaded on the recording / reproducing section, the disc fitting section 17 of the disc support member 12 fits into the center hole 3 from the tip. The disk support member 12 holds the disk 2 in a state where the disk 2 is positioned by pressing against the inner wall of the center hole 3 while reducing the diameter of the base end as the disk fitting portion 17 still enters the center hole 3.
[0023]
The turntable mounting portion 18 is formed in a disk shape on the outer peripheral portion of the lower end portion of the disk fitting portion 17 and is integrally formed to protrude therefrom. The turntable mounting portion 18 has an outer diameter sufficient to hold a non-recording area for information signals and the like on the inner peripheral side formed around the center hole 3 of the disk 2, for example, as shown in FIG. The inner peripheral portion of the turntable 13 is held in cooperation with the lower end of the disc fitting portion 17.
[0024]
The turntable 13 has an outer diameter sufficient to hold the main surface of the disk 2 without causing the disk 2 to run out. The turntable 13 has a recording / reproducing opening 22 formed of a radial slit that exposes the optical pickup 10 to a recording area for information signals and the like of the disk 2 over the entire area. Note that the turntable 13 may be formed with an outer diameter sufficient to hold the entire surface of the disk 2.
[0025]
Note that the disk drive mechanism 15 is not limited to the above-described configuration, and may be configured by various disk drive mechanisms employed in a conventional recording / reproducing apparatus. In the disk drive mechanism 15, for example, the disk support member 12 and the turntable 13 may be integrated to form a turntable.
[0026]
In the recording / reproducing apparatus 1, a circular opening 23 that allows the disk drive mechanism 15 to face outward is formed in a portion of the cover member 6 that faces the disk drive mechanism 15 described above. A disk holding mechanism 24 to be described in detail later is assembled. A cover plate 25, which will be described in detail later, is joined to the cover member 6 so as to close the opening 23, and a seal 26 that covers the cover plate 25 and has, for example, specifications or the like is attached thereto. You. The cover member 6 has a circular projection 27 bulging corresponding to the disk 2 loaded in the recording / reproducing section.
[0027]
A first annular recess 28 is formed in the cover member 6 so as to surround the opening 23 and to fit the seal 26 on the surface. The first annular concave portion 28 has a depth substantially equal to the thickness of the seal 26, and the seal 26 forms the same surface as the cover member 6 and is adhered. The cover member 6 has a second annular recess 29 having a slightly larger diameter and a slightly smaller second annular recess 29 into which the cover plate 25 is fitted by extruding the inner peripheral portion of the opening 23 toward the inner surface in a crank-shaped cross section. Three annular recesses 30 are formed. In the cover member 6, the cover plate 25 is attached to the second annular concave portion 29, and the clamping member 31 constituting the disk holding mechanism 24 is attached to the third annular concave portion 30.
[0028]
The disk holding mechanism 24 holds the disk 2 in cooperation with the above-described turntable 13 and the disk support member 12 of the disk drive mechanism 15 so that the disk 2 is rotationally driven in a stable state. As shown in FIGS. 2 and 3, the disk holding mechanism 24 is composed of members such as a clamping member 31, a disk clamper 32, and a metal washer member 33.
[0029]
The clamping member 31 is a substantially disk-shaped member having a diameter slightly smaller than that of the third annular concave portion 30, and is assembled to the third annular concave portion 30 from outside the cover member 6. The clamping member 31 is integrally formed with a locking projection 34 composed of a shaft-shaped projection positioned at the center on the inner surface side, and is positioned on the same axis as the locking projection 34 and positioned on the outer surface side. A receiving convex portion 35 having a substantially semicircular cross section is integrally formed. A plurality of fitting holes 36 are formed in the clamping member 31 so as to penetrate the bottom surface. The locking projection 34 has an outer diameter substantially equal to the inner diameter of the shaft hole 19 formed in the cylindrical shaft portion 16 of the disk support member 12 described above.
[0030]
The clamping member 31 configured as described above is rotatably assembled to the cover member 6 by being mounted in the third annular concave portion 30. In this state, the clamping member 31 is fitted into the shaft hole 19 formed in the cylindrical shaft portion 16 of the disk support member 12 with the locking projection 34 penetrating through the opening 23 and the tip of the rotating shaft 11. Is hit by. The disk clamper 32 is combined with the clamping member 31 with the cover member 6 interposed therebetween.
[0031]
The disk clamper 32 has an outer diameter substantially equal to the information signal non-recording area on the inner peripheral side of the disk 2 and has an inner diameter slightly larger than the outer diameter of the annular wall formed on the cover member 6 constituting the third annular concave portion 30. And is formed in the shape of a circular shallow dish having The disk clamper 32 forms a holding surface 37 whose bottom surface presses and holds the upper surface of the disk 2. The disc clamper 32 has a circular guide hole 38 formed at the center thereof to project the locking projection 34 of the clamping member 31 toward the disc support member 12. An annular wall is formed on the inner surface of the disc clamper 32 so as to surround the guide hole 38, and an inner space surrounded by the annular wall is formed as a washer fitting recess 39. A plurality of coupling dowels 40 are integrally formed on the inner surface of the disc clamper 32 so as to correspond to the fitting holes 36 of the clamping member 31 described above.
[0032]
A metal washer member 33 is mounted on the disc clamper 32 in a washer fitting recess 39. The metal washer member 33 has a guide hole 41 formed at the center thereof so as to penetrate the locking projection 34 of the clamping member 31. The metal washer member 33 is opposed to the magnet 14 provided on the disk support member 12 via the disk clamper 32, and magnetically clamps the disk clamper 32 and the disk support member 12 by the magnetic force of the magnet 14.
[0033]
The disc holding mechanism 24 is configured such that the disc clamper 32 covers the annular wall constituting the third annular recess 30 from inside the cover member 6 with the metal washer member 33 mounted in the washer fitting recess 39. Assembled. The disk holding mechanism 24 has a disk clamper 32 mounted in the third annular concave portion 30 from the outside of the cover member 6, and each coupling hole 36 on the disk clamper 32 side with respect to each of the fitting holes 36 of the disk clamper 32 facing each other. The dowels 40 are fitted respectively.
[0034]
In the disc holding mechanism 24, for example, by applying ultrasonic welding to the coupling dowel 40, the clamping member 31 and the disc clamper 32 are integrated with the cover member 6 interposed therebetween. In the disk holding mechanism 24, the outer peripheral portion of the clamping member 31 is regulated by the inner peripheral surface of the third annular concave portion 30, and the inner peripheral portion of the disk clamper 32 is regulated by the outer peripheral surface of the annular wall. Are rotatably combined.
[0035]
The disk holding mechanism 24 is pressed toward the disk support member 12 by an elastic piece 42 in which the clamping member 31 is formed integrally with the cover plate 25 by bending. The cover plate 25 has a disk shape having substantially the same diameter as the above-described second annular concave portion 29, and forms a substantially U-shaped notch groove 43 so as to straddle the center portion, thereby forming a rectangular portion to be left uncut. The piece constitutes an elastic piece 42. The elastic piece 42 is configured to bend the base end portion of the uncut portion downward and to bend the tip side horizontally so as to be parallel to the main surface to form the pressing portion 44. The pressing portion 44 has a length exceeding the center of the cover plate 25.
[0036]
The outer peripheral portion of the cover plate 25 is attached to the bottom surface of the second annular concave portion 29 using, for example, a double-sided adhesive tape. As shown in FIG. 2, the elastic force is accumulated in the elastic piece 42 of the cover plate 25 when the pressing portion 44 abuts on the receiving convex portion 35 of the clamping member 31 while being elastically displaced. The elastic piece 42 urges the clamping member 31 in the axial direction by this elastic force.
[0037]
In the recording / reproducing apparatus 1 configured as described above, the disk 2 mounted on the disk tray 7 is transferred to the recording / reproducing section by a loading operation, and the center hole 3 of the disk 2 is positioned and held by the disk drive mechanism 15. In the recording / reproducing apparatus 1, the disc 2 transferred to the recording / reproducing section is placed on the turntable 13, and the disc fitting section 17 of the disc supporting member 12 is fitted into the center hole 3 to thereby allow the disc 2 to move. 2 is positioned and held. In the recording / reproducing apparatus 1, the disk 2 is sandwiched between the disk support member 12 and the disk clamper 32 by the magnetic force acting between the magnet 14 and the metal washer member 33 by the lifting operation of the disk drive mechanism 15. You.
[0038]
In the recording / reproducing apparatus 1, when a recording operation or a reproducing operation is performed, the spindle motor 9 is driven and the rotating shaft 11 rotates. In the recording / reproducing apparatus 1, the turntable 13 rotates integrally with the rotation shaft 11 via the disc support member 12, and the disc clamper 32 also rotates while holding the disc 2, thereby driving the disc 2 to rotate. In the recording / reproducing apparatus 1, recording / reproducing of information signals is performed on the rotating disk 2 by the optical pickup 10 or the magnetic head.
[0039]
In the recording / reproducing apparatus 1, when the disk 2 is driven to rotate at a high speed, an axial vibration is generated on the rotating shaft 11 of the spindle motor 9. In the recording / reproducing apparatus 1, as described above, the tip of the rotating shaft 11 is fitted to the cylindrical shaft 16 of the disk support member 12, and the tip is formed on the clamping member 31 in the cylindrical shaft 16. It is abutted against the locking projection 34. In the recording / reproducing apparatus 1, the clamping member 31 is loaded with an elastic force in the axial direction by an elastic piece 42 formed on the cover plate 25.
[0040]
According to the recording / reproducing apparatus 1, the disk 2 is held between the disk support member 12 and the disk clamper 32, and the held state is held by the magnetic force applied between the magnet 14 and the metal washer member 33, and the disk 2 is held in a stable state. Is driven to rotate. According to the recording / reproducing apparatus 1, since the axial elastic force from the elastic piece 42 acts on the rotating shaft 11 via the clamping member 31, even in the case of high-speed rotation, the axial direction Is reliably suppressed. Therefore, according to the recording / reproducing apparatus 1, high-precision recording / reproducing is performed on the disk 2, and generation of vibration noise and the like is reduced.
[0041]
In the recording / reproducing apparatus 1, the magnet 14 for generating a magnetic force and the metal washer member 33 are provided on the disk support member 12 and the disk clamper 32 for holding the disk 2, but the disk is provided with a relatively light torque. Of course, when the 2 is driven to rotate, it is not necessary to particularly provide such a magnetic holding mechanism. Further, the recording / reproducing apparatus 1 may cause the magnetic flux leaking from the spindle motor 9 to act on the metal washer member 33 instead of the magnet 14 of the disk support member 12.
[0042]
【The invention's effect】
As described above in detail, according to the disk drive device of the present invention, an opening for exposing the disk holding mechanism to the outside is formed, and the disk holding mechanism is attached to the cover plate that closes the opening in the axial direction. Is formed integrally with the elastic piece, an axial load is applied to the rotating shaft of the spindle motor via the disk holding mechanism. According to the disk drive device, even when the disk is rotationally driven at a high speed, the axial load from the elastic piece is applied to the rotary shaft, thereby suppressing the axial vibration of the rotary shaft. Therefore, according to the disk drive device, the disk is driven to rotate in a stable state, and high recording / reproducing characteristics are achieved, and the generation of vibration noise and the like is reduced. According to the disk drive device, the elastic piece is integrally formed using the cover plate that closes the opening formed for adjusting the assembly of the disk holding mechanism, so that the number of parts and the number of assembly steps do not increase. Also, the cost can be reduced.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a main part illustrating a schematic configuration of a disk recording / reproducing apparatus shown as an embodiment of the present invention.
FIG. 2 is a vertical sectional view of a main part for explaining the configuration of a disk drive mechanism and a disk holding mechanism.
FIG. 3 is an exploded vertical sectional view of a main part for explaining the configuration of a disk drive mechanism and a disk holding mechanism.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Recording / reproducing apparatus 2 Disk 4 Case 5 Case main body 6 Cover member 9 Spindle motor 10 Optical pickup 11 Rotating shaft 12 Disk support member 13 Turntable 14 Magnet 15 Disk drive mechanism 16 Cylindrical shaft part 17 Disk fitting part 19 Shaft hole 23 Opening 24 Disk holding mechanism 25 Cover plate 31 Clamping member 32 Disk clamper 33 Metal washer member 34 Locking convex part 35 Receiving convex part 42 Elastic piece 43 Notch groove

Claims (3)

A housing formed by combining a case body and a cover member, a spindle motor, a turntable fixed to a rotating shaft thereof and holding a disc loaded in the housing, and the turntable assembled to the cover member and A disk drive device comprising: a disk holding mechanism that holds a central portion of the disk in cooperation with a table;
The cover member is provided with an opening that faces the disk holding mechanism outward and a cover plate that closes the opening is provided,
An axial piece of the spindle motor is axially pressed by the elastic piece integrally formed on the cover plate via the disk holding mechanism via the disk holding mechanism, thereby suppressing axial vibration generated on the rotary shaft. A disk drive device characterized by the above-mentioned. The said elastic piece is formed by bending the rectangular piece part left uncut by the substantially U-shaped notch groove formed in the cover plate corresponding to the disk holding mechanism. 2. The disk drive device according to 1. The disk holding mechanism is formed to have a diameter larger than the opening and is combined from the outer surface side of the cover member; and the clamping member has a diameter larger than the opening and opens from the inner surface side of the cover member. A disk clamper integrated with the clamping member so as to sandwich the opening peripheral wall of the portion and rotatably combined with the cover member; and a magnet mounted on the disk clamper and provided on the turntable. A magnetic washer member for holding the center of the disk between the disk clamper and the turntable,
The clamping member is integrally formed with a locking projection that is located at the center of the inner surface and penetrates the disc clamper and regulates the rotation axis of the spindle motor in the axial direction. The disk drive device according to claim 1, wherein a receiving protrusion which is pressed against the elastic piece in the axial direction is integrally formed.

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