JP2002063759A - Disk driving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk driving device to be easily manufactured with a simple constitution, which is capable of preventing the vibration of an output shaft for driving to rotate a disk chucking mechanism. SOLUTION: A disk chucking mechanism for chucking a disk 26 is fixed to the output shaft 12 of a motor 10 supported and received by bearings 48 and 50 so as to be able to be interlocked. A shaft head part 30 having a circular peripheral part concentric to the output shaft 12 is formed in a part of the disk chucking mechanism. A spring member 60 is obliquely slid into contact with the outer peripheral surface of the shaft head part 30, the output shaft 12 of the motor 10 is energized to a rotary shaft so as to be inclined to one direction, the rotary shaft of the output shaft 12 is held in the state of being made eccentric in one direction during the rotation of the motor 10, and the vibration (play) of the output shaft 12 is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive device for rotating a disk-shaped recording medium to read or write a signal.

[0002]

2. Description of the Related Art Generally, in a disk recording or reproducing apparatus such as a CD player or a DVD player, a disk of a recording medium such as a CD or a DVD is mounted on a turntable directly connected to a spindle motor of a disk drive and rotated. While driving, a signal on each track of the disk is read by an optical pickup or a signal is written to each track.

Conventionally, as a disk drive device used as described above, a disk drive device of a car-mounted CD changer as shown in FIGS. 6 and 7 has been used. In the disk drive device of this in-vehicle CD changer, a disk chucking mechanism is provided on the tip end side of the output shaft 12 of the spindle motor 10.

This disk chucking mechanism raises and lowers a turntable 28 on which a CD disk 26 is placed with respect to a clamper 18 supported by a support member 14 fixed to a disk drive device main body, and turns the turntable 28. The upper disk 26 is clamped by the clamper 18 or an operation of releasing the clamp by the clamper 18 is performed.

[0005] The clamper 18 has upper and lower flange portions 20, 22 of the clamper 18 in the loose insertion shaft hole 16 of the support member 14.
Is freely rotatably supported by the support member 14 by loosely inserting the thin body portion 24 sandwiched between the two.

The clamper 18 has a cylindrical shaft head 30 with a free end rounded at the center of rotation. Then, a spring member 32 is pressed against the tip of the shaft head 30 to urge the clamper 18 toward the turntable 28 in the rotation axis direction.

The turntable 2 is mounted on the clamper 18.
A fitting portion 34 formed as a ring-shaped protrusion concentric with the rotating shaft is integrally formed on the eight side portion.

The turntable 28 of the disc chucking mechanism is formed in an integral shape with a flange-like table 38 provided around a hub 36. The turntable 28 is fixed to the distal end of the output shaft 12 by fitting the output shaft 12 of the spindle motor 10 into a through hole 40 formed in the center of the hub 36.

In order to fit the fitting portion 34 into the turntable 28 on the surface of the hub 36 facing the clamper 18,
A fitting portion 46 is formed in a ring-shaped recess concentric with the rotation shaft.

In the disk chucking mechanism configured as described above, the disk 26 is placed on the turntable 28 and then the turntable 28 is moved to the spindle motor 1.
0, and is pressed against the clamper 18 so that the fitting portion 34 which is a convex portion is fitted to the fitting portion 46 which is a concave portion.
And a turntable 28 between which the disk 26 is held. The disc chucking mechanism lowers the turntable 28 on which the disc 26 is placed together with the spindle motor 10 to release the clamp by the clamper 18.

In the disk drive device configured as described above, while the disk 26 is held by the disk chucking mechanism, the spindle motor 10 is driven to rotate, and the optical pickup (not shown) is used to drive each track on the CD disk 26. An operation of reading a signal is performed.

When the spindle motor 10 is driven to rotate to read a signal, the spindle motor 10 is rotated due to structural dimensional errors and play in the upper and lower bearings 48 and 50 that support the output shaft 12 of the spindle motor 10. During rotation, the output shaft 12 may vibrate (wobble) so as to swing.

Then, the disk 26 held by the disk chucking mechanism provided on the output shaft 12 also vibrates,
The optical pickup may interfere with the operation of reading the signal on the CD disk 26, and may cause so-called skipping of sound. In particular, when the disk drive is driven in a so-called double speed mode in which the number of revolutions of the spindle motor 10 is doubled until the memory of the output signal becomes full, there is a large possibility that a trouble such as a sound skip may occur. is there.

As shown in FIGS. 6 and 7, one end of a torsion spring 54 is pressed against a portion of the output shaft 12 immediately extending from the housing 52 of the spindle motor 10, and the other end of the torsion spring 54 is pressed. The torsion spring 54 is mounted on a mounting member (not shown) in a state where is locked to a supporting member 56 installed on the apparatus body side. Then, the output shaft 12 is urged in one direction with respect to the rotation axis by the urging force of the torsion spring 54.

Thus, the disk drive device keeps the rotating shaft of the output shaft 12 eccentric in one direction when the spindle motor 10 rotates, thereby preventing the output shaft 12 from vibrating (rattle). CD with optical pickup
The reading operation of the signal on the disk 26 can be accurately performed, thereby preventing a trouble such as skipping of sound.

[0016]

In the above-mentioned conventional disk drive apparatus, a separate component, a torsion spring, is provided between the housing 52 of the spindle motor 10 with respect to the output shaft 12 and the turntable 28 of the disk chucking mechanism. With the arrangement of the torsion spring 54, the total length from the spindle motor 10 to the disk chucking mechanism is increased by the space for the arrangement of the torsion spring 54. Further, since the supporting member 56 must be provided in addition to the torsion spring 54, there is a problem that the number of parts increases and the structure becomes complicated.

The present invention has been made in view of the above-described circumstances, and has as its object to provide a disk drive device which can prevent vibration of an output shaft for driving a disk chucking mechanism with a simple configuration and can be easily manufactured. I do.

[0018]

According to a first aspect of the present invention, there is provided a disk drive device comprising: a motor for rotating an output shaft supported by a bearing; and a disk mounted so as to be interlocked with the output shaft. A disk chucking mechanism for chucking, a shaft head formed in a part of the disk chucking mechanism, and an oblique sliding contact with an outer peripheral surface of the shaft head, so that an output shaft of the motor is rotated with respect to the rotation shaft. A spring member for urging in one direction;
It is characterized by having.

According to a second aspect of the present invention, there is provided a disk drive device for chucking a disk, which is mounted on an output shaft supported by a bearing of a motor in an interlocking manner, and a disk chucking mechanism. The shaft head protruding from a part of the king mechanism and the sliding surface inclined with respect to the rotation axis direction of the motor within a range of an angle of 3 degrees to 9.1 degrees are brought into sliding contact with the shaft head. And a spring member that urges while being biased.

With the above-described structure, in the disk chucking mechanism, the output shaft is urged in one direction with respect to the rotation shaft by pressing the spring member against the shaft head, and the output is generated when the spindle motor rotates. The output shaft can be prevented from vibrating (rattle) by holding the rotating shaft of the shaft in an eccentric state in one direction.

According to a third aspect of the present invention, in the disk drive device according to the first or second aspect, the disk chucking mechanism includes a disk mounted on a turntable fixed to an output shaft, and a clamper. The disk head is configured to be clamped by chucking, the shaft head is protruded from the clamper, and the free end with the side pressure application angle of the spring member is obliquely pressed against the shaft head. It is characterized by.

With the above-described structure, a spring member is pressed against the shaft head of the clamper to apply an urging force for holding the disk between the clamper and the turntable. At the same time, in order to prevent the output shaft from vibrating (rattle) by keeping the rotation shaft of the output shaft eccentric in one direction when the motor rotates, the output shaft is moved in one direction with respect to the rotation shaft. An urging force for urging can be given.

According to a fourth aspect of the present invention, in the disk drive device of the first or second aspect, the disk chucking mechanism is provided at a plurality of locations on the outer peripheral surface of the hub of the turntable fixed to the output shaft. A ball chucking mechanism that is capable of appearing and retracting, and that uses a ball member attached by being urged in the protruding direction to detach a disk,
The shaft head is protruded from the turntable, and the free end of the spring member with a side pressure application angle is pressed obliquely against the shaft head.

According to a fifth aspect of the present invention, in the disk drive device according to the first or second aspect, the disk chucking mechanism includes a disk mounted on a turntable fixed to an output shaft. The clamper is placed on the disc, and the disc is clamped and chucked by the magnet attracting structure provided on the turntable and the clamper. The spring member is characterized in that a free end portion having a side pressure application angle is pressed obliquely.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of a disk drive according to the present invention will be described with reference to FIGS. In FIGS. 1 to 5, the same members as those of the conventional example shown in FIGS. 6 and 7 are denoted by the same reference numerals, and are provided for convenience of explanation.

FIGS. 1 and 2 are schematic cross-sectional views showing a disk drive device of a vehicle-mounted CD changer, wherein 10 is a spindle motor, and 12 is an output shaft. This car C
In the disk drive device of the D changer, a disk chucking mechanism is directly connected to the distal end of the output shaft 12 in order to mount the disk chucking mechanism on the output shaft 12 of the spindle motor 10 in an interlockable manner.

This disk chucking mechanism raises and lowers the turntable 28 on which the CD disk 26 is mounted together with the spindle motor 10 with respect to the clamper 18 supported by the support member 14 fixed to the disk drive device main body. Then, the disk 26 on the turntable 28 is clamped by the clamper 18 or an operation of releasing the clamp by the clamper 18 is performed.

The clamper 18 has upper and lower flange portions 20, 22 of the clamper 18 in the loose insertion shaft holes 16 of the support member 14.
Is freely rotatably supported by the support member 14 by loosely inserting the thin body portion 24 sandwiched between the two.

The clamper 18 has a cylindrical shaft head 30 erected at the center of rotation. As shown in FIGS. 1 and 2, the shaft head 30 has rounded corners of a circular end face at its free end. The free end of the shaft head 30 may be formed in a hemispherical shape. Shaft head 3 in clamper 18
The spring member 60 is pressed against the leading end of the zero.

The tip of the shaft head 30 and the spring member 60
It is desirable to apply oil or grease that does not easily flow out as a measure against abnormal wear of the sliding portion with the above. Furthermore, the shaft head 30 is not only formed in a shaft rod shape,
The output shaft 12 may be formed in a ring shape concentric with the output shaft 12, and the spring member 60 may be pressed against the circular peripheral portion.

The clamper 18 is formed integrally with a fitting portion 34 formed in a ring-shaped projection concentric with the rotating shaft on the turntable 28 side.

The turntable 28 of the disc chucking mechanism is formed in an integral shape with a flange-shaped table 38 provided around a hub 36. The turntable 28 is fixed to the distal end of the output shaft 12 by fitting the output shaft 12 of the spindle motor 10 into a through hole 40 formed in the center of the hub 36.

In order to fit the fitting portion 34 into the turntable 28 on the surface of the hub 36 facing the clamper 18,
A fitting portion 46 is formed in a ring-shaped recess concentric with the rotation shaft.

As shown in FIGS. 1 and 2, in the disk chucking mechanism, the disk 26 is placed between the clamper 18 and the turntable 28 by pressing a spring member 60 against the shaft head 30 of the clamper 18. An urging force for pinching and holding, and to prevent the output shaft 12 from vibrating (rattle) by holding the rotating shaft of the output shaft 12 in one direction when the spindle motor 10 rotates. And an urging force for urging the output shaft 12 in one direction with respect to the rotation shaft.

The spring member 60 is formed as an integral member by pressing a thin metal plate as shown in FIG. In the spring member 60, a rectangular wide plate-shaped body plate portion 60B continues from a rectangular long side base end portion 60A via a bent step portion, and furthermore, a predetermined side pressure application angle is applied to the body plate portion 60B. A small rectangular plate-shaped press contact portion 60C that is bent and formed to be continuous is integrally formed.

A through hole 62 and an opening 64 for fastening are formed in the base end portion 60A of the spring member. This base end 60A is
The disk drive is fastened to a fixed frame or the like (not shown) by screws. The spring member 60 in which the base end portion 60A is fastened to a fixed frame or the like in a cantilever manner as described above is installed such that the free-end press contact portion 60C faces the tip of the shaft head 30.

The press contact portion 60C of the spring member has a press contact urging portion 70 formed by cutting and raising two small rectangular pieces, guide pieces 66 and 68, in parallel with each other to form an inverted U-shaped cross section as shown in FIG. Is provided.

The body plate portion 60B of the spring member is provided when the spring member 60 is installed in a cantilever shape on a fixed frame or the like, and the pressure contact urging portion 70 is pressed against the shaft head 30 of the clamper 18. The body plate portion 60 </ b> B is elastically deformed, and the pressure contact urging portion 70 applies a predetermined urging force F to the shaft head 30.

The biasing force F applied to the shaft head 30 by the spring member 60 acts in a direction inclined at an angle θ with respect to the axial direction of the output shaft 12, as shown in FIG.

As a result, the spring member 60 is
8, the output shaft 12 is held in one direction with respect to the rotation axis to prevent the vibration by holding the output shaft 12 of the spindle motor 10 in one direction while holding the disk 26 in one direction. The urging force is applied via the shaft head 30.

Next, in order to apply an urging force F to the shaft head 30 in a direction inclined by an angle θ with respect to the axial direction of the output shaft 12, the press contact urging portion 70 of the press contact portion 60 C of the spring member 60 is applied. The configuration relating to the side pressure applying angle by which the shaft head 30 is pressed will be described.

In the first embodiment, in order to press the spring member 60 against the shaft head 30 at a side pressure application angle, a portion of the spring member 60 that is continuous from the body plate portion 60B to the pressure contact portion 60C is fixed at a predetermined side pressure application angle. It is configured to be bent at.
That is, the pressure contact urging portion 70 of the pressure contact portion 60C is formed so as to form a predetermined side pressure application angle with respect to the body plate portion 60B.

This lateral pressure application angle is determined as follows.

First, as shown in FIG. 1, when a force F is applied in a direction θ with respect to the axial direction of the output shaft 12 acting on the shaft head 30, when the force F The lateral pressure F _A applied to the bearing 48 is as follows.

Here, the center distance between the bearing 48 and the bearing 50 is L = 9.6 mm, and the distance from the upper bearing 48 to the spring member 60 for applying the side pressure is A = 10.6.

F _A = (L + A) ÷ L × F sin θ = 2
0.2 ÷ 9.6 × Fsin θ.

Second, the output shaft 1 of the spindle motor 10
As for the lateral pressure T that can be applied to the so-called noise skipping countermeasure 2, it is separately determined by experiment that T = 100 gf or less (center distance: 9.6 mm) in terms of bearing.

Here, at a position of A mm from the mounting surface,
To determine how many g of lateral pressure is applied, the bearing 48
When the distance between the shaft and the bearing 50 is L: 9.6 mm, and the distance from the upper bearing 48 to the spring member 60 for applying the lateral pressure is A, the lateral pressure X is obtained by the following equation.

X = L ÷ (L + A) × T = 9.6 ÷ (9.
6 + A) × 100 Here, if A = 3 mm in the above equation, X = 76 gf or less.

Third, the output shaft 1 of the spindle motor 10
As for the actual value of the thrust overload life test (shaft output change amount) with respect to No. 2, after applying a static load of 20 kgf to the output shaft 12 of the spindle motor 10 (considering the press-fit of the turntable 28), the thrust load is approximately 600
From the result of the wear confirmation test of the shaft receiver, which estimated the amount of change in the shaft protrusion during continuous operation at rpm and CW, the wear amount of the shaft receiver was small, the large thrust load was 200 gf, and the load was 200 gf. It turned out that it was the above tendency.

It was also found that the higher the motor speed, the greater the wear.

Therefore, the standard value is 300 gf or less.

Fourth, considering the above conditions, F = 30
0 gf, the side pressure application angle θ and the upper bearing 48
When the relationship with the lateral pressure F _A applied to was obtained, the result as shown in the graph of FIG. 4 was obtained.

On the graph of FIG. 4, when the above-mentioned first condition, that is, the side pressure F _A must be 100 gf or less, and as a second condition, an experiment was conducted using an actual apparatus,
The following conclusion is derived from the fact that the sound skipping prevention effect was obtained when the side pressure application angle of the spring member 60 with respect to the shaft head 30 was 3 degrees or more.

Fifth, as a conclusion obtained from the above description, the appropriate range of the lateral pressure application angle θ is from θ = 3 degrees to 9.1.
Range of degrees. In particular, in the first embodiment, it has been found that it is preferable to set θ = 5 degrees ± 30 minutes from the conditions such as the size and shape of each part of the disk drive device.

Next, the operation and operation of the disk chucking mechanism according to the first embodiment will be described.

The disk chucking mechanism is provided on the turntable 28 in the standby state shown in FIG.
Then, the turntable 28 is raised together with the spindle motor 10 and pressed against the clamper 18 to bring the fitting portion 34 which is a convex portion into the fitting portion 46 which is a concave portion.

Further, in the disc chucking mechanism in this use state, the disc 26 is held between the clamper 18 and the turntable 28 by the urging force of the spring member 32 and held as shown in FIG.

The disk chucking mechanism lowers the turntable 28 on which the disk 26 is placed together with the spindle motor 10 to release the clamp by the clamper 18.

In the disk drive device configured as described above, the spindle motor 10 is used in a state where the disk 26 is held by the disk chucking mechanism shown in FIG.
While the is rotated, a reproducing operation of reading a signal on each track of the CD disk 26 by an optical pickup (not shown) is performed.

During the operation of reading the signal by rotating the spindle motor 10, the output shaft 12 of the spindle motor 10 is driven by the side pressure of the spring member 60 pressed against the shaft head 30 at a predetermined side pressure application angle. The rotation shaft of the output shaft 12 is held in a state of being urged in one direction when the rotation of the rotation shaft 10 is performed, so that the rotation shaft of the output shaft 12 is prevented from vibrating (rattle) when the spindle motor 10 rotates.

Accordingly, the disk 26 held by the disk chucking mechanism fixed to the output shaft 12 is smoothly rotated, and the operation of reading the signal on the CD disk 26 by the optical pickup is reliably performed, so-called sound skipping. And other obstacles can be prevented.

In particular, even when the disk drive is driven in a so-called double speed mode in which the number of rotations of the spindle motor 10 is doubled until the memory of the output signal is full, troubles such as skipping of sound are good. The effect of preventing this is great.

Further, since this disk drive device is for use in a vehicle, the disk drive device is subject to vibration generated when the vehicle is running. However, this disk chucking mechanism can stably hold the chucking state of the CD disk 26 by urging the shaft head 30 by the spring member 60. Furthermore, the deflection of the output shaft 12 is suppressed by the side pressure of the spring member 60, the operation of reading the signal on the CD disk 26 by the optical pickup is reliably executed, and so-called sound skipping and other obstacles can be prevented.

Next, a disk drive according to a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, the disk chucking mechanism is constituted by a so-called ball chucking mechanism.

This ball chucking mechanism comprises only the turntable 28. Therefore, the clamper 18 is not used. The turntable 28 of the ball chucking mechanism has a flange-like table 38 around a hub 36.
Are formed in an integral shape. This turntable 28
Is fixed to the tip of the output shaft 12 by fitting the output shaft 12 of the spindle motor 10 into a through hole 40 formed in the center of the hub 36.

As shown in the figure, in the ball chucking mechanism, the ball members 72 are mounted on a plurality of predetermined locations on the outer peripheral surface of the hub 36 of the turntable 28, respectively, so that the ball members 72 can protrude and retract and are urged in the projecting direction.

When the disk 26 is mounted on the turntable 28, the disk 26 is pressed onto the table 38 through the center circular hole of the disk 26 against the hub 36. Then
By this operation, each ball member 72 is pushed into the hub 36 against the urging force and passes around the round hole of the disk 26.

In this way, the disk 26 is stored in the table 3
8, each ball member 72 returns to the protruding state by the urging force, and the disk 26 is moved to the table 38.
Maintain the state of being placed on top.

The disk 26 is connected to the turntable 28
When the disk 26 is removed from the table 38, the ball member 72 is lifted from the table 38 so that each ball member 72 resists the urging force.
Is disengaged by being pushed into the
Can be removed from the turntable 28.

Further, the turntable 28 is formed integrally with a shaft head 30 on an extension of the rotation shaft of the output shaft 12 in the hub 36 of the turntable 28. By pressing the pressure contact urging portion 70 of the spring member 60 against the free end of the shaft head 30, the output shaft 1 is rotated when the spindle motor 10 rotates.
The output shaft 1 is held while the rotary shaft 2 is eccentric in one direction.
In order to prevent the 2 from vibrating (rattle), an urging force for urging the output shaft 12 to incline in one direction with respect to the rotation shaft is applied.

The configuration, operation, and effects of the second embodiment other than those described above are the same as those of the above-described first embodiment, and a description thereof will be omitted.

Although not shown, the disk chucking mechanism used in the disk drive device uses a commonly used magnet to turn the turntable 28.
Of course, it may be configured to adsorb the clamper 18 and the clamper 18.

[0074]

According to the disk drive device of the present invention, it is possible to prevent the vibration of the output shaft that rotationally drives the disk chucking mechanism with a simple configuration. Furthermore, since it can be easily manufactured, there is an effect that an inexpensive product can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view illustrating a main part of a disk drive device according to a first embodiment of the present invention in use.

FIG. 2 is a schematic cross-sectional view showing a main part of the disk drive device according to the first embodiment of the present invention in a standby state.

FIG. 3 is an enlarged perspective view showing a spring member in the disk drive device according to the first embodiment of the present invention.

FIG. 4 shows a relationship between a side pressure application angle θ for applying a side pressure to a shaft head by a spring member in the disk drive device according to the first embodiment of the present invention, and a side pressure F _A applied to an upper bearing of a spindle motor. FIG.

FIG. 5 is a schematic partial cross-sectional view illustrating a disk drive device according to a second embodiment of the present invention.

FIG. 6 is a schematic cross-sectional view illustrating a main part of a conventional disk drive device.

FIG. 7 is a bottom view showing a disk chucking mechanism in a conventional disk drive device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Spindle motor 12 Output shaft 18 Clamp 26 Disk 28 Turntable 30 Shaft head 36 Hub 48 Bearing 50 Bearing 60 Member 60A Base end 60B Body plate part 60C Pressure contact part 62 Through hole 64 Opening 66 Guide piece 70 Pressure contact urging part 72 Ball member

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kota Mizoguchi 1-2-1-11 Ikenota, Taito-ku, Tokyo Iwa Corporation (72) Inventor Takashi Miura 1-2-11 Ikenota, Taito-ku, Tokyo Ai 5D038 BA04 BA05 CA03 CA21 CA40 5D109 BB05 BB14 BB28

Claims (5)

[Claims] A motor for rotating an output shaft supported by a bearing; a disk chucking mechanism mounted on the output shaft so as to be interlocked with the disk for chucking a disk; A shaft head formed in part; and a spring member that obliquely slides on an outer peripheral surface of the shaft head and urges the output shaft of the motor in one direction with respect to a rotation shaft. A disk drive device characterized by the above-mentioned. 2. A disk chucking mechanism for chucking a disk, the disk chucking mechanism being mounted on an output shaft supported by a bearing of a motor, and a shaft head protruding from a part of the disk chucking mechanism. And a spring member that urges while slidingly contacting the shaft head in a state where the sliding contact surface is inclined at an angle of 3 degrees to 9.1 degrees with respect to the rotation axis direction of the motor. A disk drive device comprising: 3. The disc chucking mechanism is configured such that the disc is placed on a turntable fixed to an output shaft, and the disc is chucked by clamping the disc with a clamper. The disk drive according to claim 1 or 2, wherein a head is protruded, and a free end with a side pressure application angle of a spring member is obliquely pressed against the shaft head. apparatus. 4. The disk chucking mechanism utilizes a ball member which can be protruded and retracted at a plurality of locations on an outer peripheral surface of a hub of a turntable fixed to an output shaft and is biased and mounted in a protruding direction. It is constituted by a ball chucking mechanism for mounting and dismounting a disc, and the shaft head is protruded from the turntable, and the free end of the spring head with a side pressure applying angle of a spring member is obliquely pressed against the shaft head. The disk drive device according to claim 1, wherein the disk drive device is configured as described above. 5. The disc chucking mechanism is provided with the disc mounted on a turntable fixed to an output shaft, a clamper mounted on the disc, and provided on the turntable and the clamper. The disk is sandwiched and chucked by a magnet attracting structure, the shaft head is protruded from the clamper, and the shaft head has a free end provided with a side pressure application angle of a spring member. The disk drive device according to claim 1, wherein the disk drive device is configured to be pressed obliquely.