JPH1092128A - Disk storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily achieve the large capasity of a disk storage device by a method wherein one end part of a rotating fulcrum shaft is fixed direclty to a case body at the disk storage device or to a member fixed to the case body, the other end part is supported via a viscoelastic body, a vibration due to the inclination of the rotating fulcrum shaft or a vibration due to the deformation of a suspension can be reduced and the band width of a rotaiton-type voice coil motor(VCM) is made wide. SOLUTION: A rotation-type VCM 5 has a shape extended to respective opposite directions by sandwiching a pivot 6 attached onto a chassis 2, one end part of it is formed as an arm 7 which is formed to be nearly a U-shape as viewed from the side and which is extended in parallel to the upper part and the lower part, and the other end part is formed as a coil 8. The lower end part of a rotating fulcrum shaft 17 is fixed to the chassis 2 by a prescribed member, a damper 19 which is composed of a viscoelastic body is placed on the upper edge 17c of the rotating fulcrum shaft 17 so as to support the rotating fulcrum shaft 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arm provided with a recording / reproducing head which is rotatably supported on a shaft member having a rotating fulcrum shaft and is rotated by a driving mechanism. The present invention relates to a disk storage device having the arm for moving the recording / reproducing head on a recording / reproducing disk.

[0002]

2. Description of the Related Art In a disk storage device for recording information on a rotating recording / reproducing disk or reading out the recorded information, for example, in a hard disk device, a spindle motor is provided in a space enclosed by a case body. A rotatable actuator or a rotatable voice coil motor (hereinafter referred to as a “rotational voice coil motor”) having a rotatable metal magnetic disk disposed thereon and an arm or the like rotatably supported by a shaft member about a pivot point. A dynamic VCM is moved in the tracking direction of a rotating magnetic disk to record and reproduce information.

FIG. 12 shows an example of a rotary VCM in a conventional disk storage device as described above.
The rotary VCMa presses a pivot b, arms c, c, a coil d for generating a driving force, head sliders e, e having a magnetic head (not shown) attached thereto, and head sliders e, e against a magnetic disk with a predetermined load. It comprises suspensions f acting as springs, magnets g constituting a magnetic circuit, an upper yoke h and a lower yoke i.

In the rotary VCMa, as shown in FIG. 12, when the coil d is energized, the coil d moves in the direction of R1 by its electromagnetic force. And this coil d
, The slider e is moved in the R2 direction, the magnetic head attached to the slider e is positioned at an arbitrary track on the magnetic disk j, and signals can be read and written.

As shown in FIG. 13, the pivot b used in the rotary VCMa includes two ball bearings k, k, a rotary fulcrum shaft l, and a sleeve m. The rotation fulcrum shaft 1 is fixed to the case n of the disk storage device by fastening means such as a screw o. For example, FIG.
A cantilever type support structure in which only one end in the axial direction of the rotation fulcrum shaft 1 shown in FIG.
There is a two-sided support structure in which both ends in the axial direction of the rotation fulcrum shaft 1 shown in FIG. 14 are fixed to case bodies n, n by screws o, o.

[0006]

Incidentally, in the above-mentioned rotary type VCMa, since the rotary type VCMa is a mechanical structure, it has various inherent vibrations accompanying the movement of each component. Is also transmitted to the magnetic head. The vibration transmitted to the magnetic head is harmful, and among them, vibration in the tracking direction is particularly undesirable because it makes positioning of the magnetic head difficult.

As a method of evaluating the vibration characteristics of the rotary VCM, a transfer function in the rotation direction of the rotary VCM is often used. FIG. 15 shows a transfer function in a rotating direction of a rotary VCMa having a pivot in which the rotation fulcrum shaft k shown in FIG. 13 has a cantilevered support structure, and FIG. Rotating type VC having a pivot whose pivoting fulcrum shaft k shown in FIG. 14 has a doubly supported structure.
9 shows a transfer function in the rotating direction of Ma.

[0008] As shown in FIGS. 15 and 16, A, B and C are peaks of respective inherent vibrations associated with the movement of the components of the rotary VCMa generated in a specific frequency range. That is, A is the ball bearing j, j
B is due to the deformation of the suspension f, f due to the inclination of the pivot axis k due to the temporary deformation of the ball,
C is based on the eccentricity of the rotation fulcrum shaft k. In other words, if the rotation fulcrum shaft k is a cantilever type support structure, A and B become obvious, and if it is a double-support type support structure, A completely disappears and B also has a considerable decrease in gain. It becomes to become.

In order to increase the capacity of a disk storage device, that is, to perform high-density recording on a recording / reproducing disk, it is essential to widen the operating range of the rotary VCM. This is hindered by the appearance of vibrations such as.

Accordingly, it is an object of the disk storage device of the present invention to widen the operating range of the rotary VCM by eliminating or reducing the vibrations of A, B, C and the like.

[0011]

In order to solve the above-mentioned problems, a disk storage device according to the present invention includes a case body of a disk storage device or a member fixed to the case body, which is provided with one end of a pivot shaft. It is directly fixed and the other end is supported via a viscoelastic body.

Therefore, the peaks of various inherent vibrations caused by the movement of each part can be suppressed low, and the operating range of the rotary actuator and the rotary voice coil motor can be widened. .

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a disk storage device according to an embodiment of the present invention. In the following embodiments and modified examples, the disk storage device of the present invention is applied to a hard disk device.

FIGS. 1 to 5 show a first embodiment of the disk storage device of the present invention.

In the following description, the basic structure and operation of a hard disk device are known, and the hard disk devices shown in the following embodiments and modified examples also have the same basic configuration as a known hard disk device. Therefore, description of the basic configuration will be omitted, and only the main part of the present invention will be described in detail (the same applies to other embodiments and modifications described later).

A hard disk drive (hereinafter, referred to as “HD”) 1 is rotated by a spindle motor (not shown) in an enclosed space defined by a metal or synthetic resin chassis 2 and a top cover 3 constituting a case body. A magnetic disk 4 made of metal and a rotary voice coil motor (rotary VCM) 5 are arranged.

As shown in FIGS. 1 and 2, the rotary VCM 5 has a shape extending in opposite directions with a pivot 6 mounted on the chassis 2 interposed therebetween. The arms 7 are substantially U-shaped when viewed from the side and extend vertically in parallel, and the other end is a coil 8. The arms 7, 7 have suspensions 10, which support head sliders 9, 9 on which magnetic heads (not shown) are attached at their distal ends, and act as springs for pressing them against the disk 4 with a predetermined load. 10 is attached. Further, at the other end of the rotary VCM 5, the magnet 11, the upper yoke 12, and the lower yoke 13
Are arranged so as to sandwich the coil 8 from above and below. A support hole 14a for externally fitting to the pivot 6 is provided in the main portion 14, which is a central portion sandwiched between the arms 7, 7 and the coil 8 of the rotary VCM 5, as described later. I have.

As shown in FIG. 2, the pivot (shaft member) 6 has a substantially cylindrical shape, a sleeve 15 having a flange 15a formed at the lower end, ball bearings 16 and 16, and a substantially columnar shape. The rotation fulcrum shaft 17 has a flange 17a formed at the lower end and a screw hole 17b opened at the lower end surface. The pivot 6 is fixed on the chassis 2 as follows.

That is, the ball bearings 16 and 16 are externally fitted to the rotation fulcrum shaft 17 in advance so as to be vertically overlapped, and the sleeve 15 is further externally fitted to the outside thereof so that the rotation fulcrum shaft 17 is attached. The sleeve 15 is rotatable around the center. The pivot 17 is connected to a flange 17a.
Is mounted on the chassis 2 so as to fit into the recess 2 a provided at a predetermined position of the chassis 2, and the screw 18 is inserted through the screw insertion hole 2 b from below the chassis 2 and the screw 18 is inserted into the screw hole 17 b. Is fixed to the chassis 2 by being screwed into the chassis 2.

The rotary VCM 5 is shown in FIGS.
As shown in FIG. 7, the main part 14 is fitted on the pivot 6 so that the sleeve 15 is fitted into the support hole 14a, so that the main part 14 is rotatably supported on the chassis 2. At this time,
As shown in FIG. 2, the coil 8 comes to be located between the upper yoke 12 and the lower yoke 13 and the suspension 1
The head sliders 9, 9 supported by the sliders 0, 10 are positioned so as to sandwich the magnetic disk 4 from above and below.

Next, as shown in FIG.
When a damper 19 made of a viscoelastic material such as synthetic rubber is placed on the upper end face 17c of the base member 2 and the top cover 3 is fixed on the chassis 2 by an appropriate method, as shown in FIG. The shaft 17 is sandwiched between the upper end surface 17c of the shaft 17 and the convex portion 3a formed at a corresponding position of the top cover 3, and is elastically deformed so that the rotation fulcrum shaft 17 is supported also at the upper portion.

FIG. 4 shows a transfer function of the rotary VCM 5 in the rotation direction of the HD 1 in the HD 1. As compared with FIG.
It is apparent that the gain of the peak A caused by the inclination of the rotation fulcrum shaft 17 due to the temporary deformation of the ball 6 and the gain of the peak B caused by the deformation of the suspensions 10 and 10 are greatly improved.

By the way, depending on the shape of the damper 19,
As shown in FIG. 5, when the damper 19 is sandwiched between the upper end face 17c of the rotation fulcrum shaft 17 and the protrusion 3a of the top cover 3, the damper 19 is excessively deformed, and the sleeve 15 and the ball bearing 1 are deformed.
There is a case where a problem arises that the rotation of the rotary VCM 5 is hindered by contacting a part of the rotary VCM 6 or 16. In order to avoid this problem, the shape or size of the damper 19 may be strictly defined.

FIGS. 6 and 7 show first and second modified examples in which the method of clamping the pivot and the damper is changed as another method for avoiding the above problem.

In each of the following modifications, the first
Only the portions different from the first embodiment will be described, and the description of the same portions as those in the first embodiment will be omitted by using the same reference numerals as those used in the first embodiment.

In the first modification shown in FIG. 6, a disk-shaped washer 20 is interposed between the damper 19 and the upper end face 17c of the pivot shaft 17. Washer 2
0 has an outer diameter slightly smaller than the outer diameter of the sleeve 15,
When placed on the upper end face 17c of the rotation fulcrum shaft 17, as shown, the sleeve 15 and the ball bearings 16, 1
Since a slight gap is formed between the upper end of the VCM 6 and the lower surface of the washer 20, the washer 20 does not contact the sleeve 15 and the ball bearings 16 and 16 and does not hinder the rotation of the rotary VCM 5.

In a second modification shown in FIG. 7, the washer 20 in the first modification is integrated with a pivot shaft. That is, the pivot 21 is connected to the pivot 2
2 and the same sleeve 15 and ball bearings 16, 16 as in the first embodiment.

The rotation fulcrum shaft 22 has a shape obtained by turning the rotation fulcrum shaft 17 shown in the first embodiment approximately upside down, has a columnar shape as a whole, and has a flange 22 at its upper end.
a is formed and a screw hole 22b opened at the lower end surface is formed. The upper end of the rotation fulcrum shaft 22 having the flange 22a has the same function as the washer 20 mounted on the upper end surface 17c of the rotation fulcrum shaft 17 shown in the first modification. is there. Then, ball bearings 16 are vertically fitted on the rotation fulcrum shaft 22 from below, and the sleeve 15 is further fitted outside thereof.

That is, the rotation fulcrum shaft 22 is mounted on the chassis 2 with its lower end fitted into a concave portion 2 a provided at a corresponding position of the chassis 2, and the screw insertion hole 2 b is inserted from below the chassis 2. Insert the screw 18 into the screw hole 22b
It is fixed by screwing into. At this time, the flange 22a of the pivot shaft 22 is positioned so as to cover the sleeve 15 and the ball bearings 16 from above.

Then, the damper 19 is placed on the upper end surface 22c of the pivot shaft 22, and the top cover 3 is
When the damper 19 is fixed by an appropriate method, the damper 19 is sandwiched between the upper end surface 22c of the rotation fulcrum shaft 22 and the convex portion 3a formed at a corresponding position of the top cover 3, and the sleeve 22 is further fixed by the flange 22a. Contact with 15 and ball bearings 16, 16 is avoided.

FIG. 8 shows a third modification in which a member for supporting the rotation fulcrum shaft via a damper is changed.

In the third modification, the upper part of the pivot 6 is supported by the upper yoke 23 via the damper 19.

That is, the upper yoke 23 has a boss 24 formed at one end inside the chassis 2 and a screw 18 inserted in the screw insertion hole 23a.
The upper end of the pivot 6 is supported on the other end of the pivot 6 via a damper 19 sandwiched between the other end and the upper end surface of the rotation fulcrum shaft 17.

That is, the upper yoke 2 plays the same role as the top cover 3 for the pivot 6 in the first embodiment.
3 Note that, instead of fixing the upper yoke 23 to the boss portion 24 of the chassis 2, the shape of the lower yoke 13 may be changed and fixed to this, as in a fourth modified example described later.

FIG. 9 also shows a fourth modification in which the members for fixing and supporting the pivot shaft are changed.

In the fourth modification, the lower yoke 25
Is formed in a substantially L-shaped vertical cross-sectional shape, and is formed in a screw hole 26 which is opened at an upper end surface of an upright wall portion 26 which extends upward.
a is formed. Further, two screw insertion holes 27a and 27b are formed in the bottom portion 27 of the lower yoke 25, and a magnet 28 is attached thereto. Further, screw insertion holes 27 a and 27 of the lower yoke 25 are provided on the bottom surface of the chassis 2.
A screw hole 29 and an insertion hole 30 are formed at a position corresponding to b. The screw insertion hole 27a is formed at a position that is not hidden by the upper yoke 23 when the upper yoke 23 is fixed to the lower yoke 25.

Thus, the lower part of the pivot 6 which rotatably supports the rotary VCM 5 is screwed with the screw 19 inserted through the screw insertion hole 27 b of the lower yoke 25 into the screw hole 17 of the rotation fulcrum shaft 17.
b is fixed to the lower yoke 25 by being screwed into the lower yoke 25.
The screw 18 inserted through the screw insertion hole 23a into the screw hole 26a.
It is fixed by screwing into.

Accordingly, the lower part of the pivot 6 supporting the rotary type VCM 5 is fixed to the lower yoke 25 and the upper part of the pivot 6 is the damper 1.
9 and supported by the upper yoke 23. That is,
In the fourth modification, the lower yoke 25 and the upper yoke 23 have the same role as the chassis 2 and the top cover 3 with respect to the pivot 6 in the first embodiment. Since the pivot 6 can be supported only by the upper yoke 23 and the lower yoke 25, the rotary VCM
5, the pivot 6, the upper yoke 23, and the lower yoke 25 can be integrally unitized and handled as a so-called rotary VCM unit 31. By assembling the rotary VCM unit 31 in advance, the HD1 assembling work can be performed. Can be done easily.

The rotary VCM unit 31
Is fixed on the chassis 2 by screwing the screw 18 inserted through the screw insertion hole 27 a of the lower yoke 25 from above into the screw hole 30 of the chassis 2.

FIG. 10 shows a second embodiment 40 of the disk storage device of the present invention.

In the following second and third embodiments, only parts different from the first embodiment will be described, and the same parts as those in the first embodiment will be described. The description will be simplified by using the same reference numerals as those used in the first embodiment.

The HD 40 is a metal magnetic disk which is rotated by a spindle motor (not shown) in a closed space defined by the chassis 2 and the top cover 3, similarly to the HD 1 in the first embodiment shown in FIG. 4 and a rotating VCM 5 and the like.

The rotary VCM 5 has a shape extending in opposite directions with a pivot 41 mounted on the chassis 2 interposed therebetween, and one end of the rotary VCM 5 has a substantially U shape when viewed from the side. For this purpose, the arms 7 and 7 extend vertically in parallel, and the other end is a coil 8. The arms 7, 7 have suspensions 10, which support head sliders 9, 9 on which magnetic heads (not shown) are attached at their distal ends, and act as springs for pressing them against the disk 4 with a predetermined load. 10 is attached. Further, at the other end of the rotary VCM 5, the magnet 11, the upper yoke 42 and the lower yoke 43 are arranged so as to sandwich the coil 8 from above and below.

The upper yoke 42 has a screw insertion hole 42 at one end.
a and a support hole 42b is formed at the other end. The upper yoke 42 has a screw insertion hole 42a at one end thereof formed in a boss 44 formed inside the chassis 2.
Screw 18 is inserted into screw hole 44 provided in boss portion 44.
It is fixed by screwing into a. A thick ring-shaped damper 45 is press-fitted or inserted into the support hole 42b of the upper yoke 42, and then fixed by bonding or the like.

The pivot 41 comprises a sleeve 15 having a substantially cylindrical shape and a flange 15a formed at the lower end, ball bearings 16 and 16, and a pivot shaft 46.

The rotation fulcrum shaft 46 has a substantially cylindrical main part 4.
7, a flange 47a is formed at the lower end, and a screw hole 47b opening at the lower end surface is formed.
A support projection 48 having a diameter approximately half the diameter of the main portion 47 is integrally formed from the center of the upper end surface of the main portion 47. The pivot 41 is fixed on the chassis 2 as follows.

That is, the rotation support shaft 46 is provided with the main part 4 in advance.
The ball bearings 16 are externally fitted to the top 7 so as to be vertically overlapped, and a sleeve 15 is externally fitted to the outside thereof. Then, the lower end of the rotation fulcrum shaft 46 where the flange 47 a is formed is placed on the chassis 2 so as to fit into the concave portion 2 a provided at a corresponding position of the chassis 2, and a screw insertion hole is formed from below the chassis 2. 2b is screwed into the screw hole 47b so that the chassis 2
Fixed to

Then, the main portion 14 of the rotary VCM 5 is externally fitted to the pivot 41, that is, the sleeve 15 is internally fitted and fixed in the support hole 14a, thereby rotating the rotary VCM 5 on the chassis 2. Support freely.

Next, the damper 45 is press-fitted or inserted into the support hole 42b of the upper yoke 42 and then fixed with an adhesive or the like. Then, the support hole 42b of the upper yoke 42 is
A rotation fulcrum shaft 46 together with a damper 45 fixed therein.
The upper yoke 42 is fixed to the chassis 2 by screwing the screw 18 inserted through the screw insertion hole 42a from above into the screw hole 44a of the boss portion 44 from above. The upper part of the pivot shaft 46 is supported. At this time, the coil 8 is located between the upper yoke 42 and the lower yoke 43, and the head sliders 9, 9 supported by the suspensions 10, 10 are positioned so as to sandwich the magnetic disk 4 from above and below. .

Thus, the rotary VCM 5 has a lower portion fixed to the chassis 2 and an upper portion rotatably supported by the chassis 2 by a pivot 41 supported by the upper yoke 42 via a damper 45. Becomes

Finally, a third embodiment 50 of the disk storage device of the present invention will be described with reference to FIG.

In the chassis 2 of the HD 50, a concave portion 51 is formed at a predetermined position for fixing the pivot on the inner surface, and a screw hole 52 penetrating to the lower surface of the chassis 2 is formed at the center of the concave portion 51. ing.

The pivot 53 has a substantially cylindrical shape, a sleeve 15 having a flange 15a formed at the lower end, ball bearings 16 and 16, a substantially cylindrical rotating fulcrum shaft 54,
And a fixing screw 55 having a flat substantially disk-shaped head 55a.

The rotation fulcrum shaft 54 has a through hole 54a penetrating from the upper end to the lower end at the axial center, and a flange 54b at the lower end.

In the rotary VCM 5, the pivot 53 is fitted in the support hole 14 a of the main part 14, that is, the support hole 14 a
After the sleeve 15 is rotatably supported by the sleeve 15 being fitted inside the pivot a, the pivot 53 is fixed to the chassis 2 as follows. That is, the ball bearings 16 and 16 are externally fitted to the rotation fulcrum shaft 54 in advance so as to be vertically overlapped, and the sleeve 15 is externally fitted to the outside thereof. Then, the lower end of the rotation fulcrum shaft 54 where the flange 54 b is formed is placed on the chassis 2 so as to be fitted into a concave portion 51 provided at a corresponding position of the chassis 2. Washer-shaped damper 5
6, the fixing screw 55 is inserted into the through hole 54a from above the rotation fulcrum shaft 54, and screwed and fixed to the screw hole 52 of the chassis 2. The damper 56 is fixed to the fixing screw 55
Of the rotation fulcrum shaft 54.

Thus, the rotary VCM 5 has a lower portion fixed to the chassis 2 by the fixing screw 55 and an upper portion rotatably supported by the pivot 41 supported by the fixing screw 55 via the damper 56. Becomes

As described above, in the third embodiment, since the fixing screw 55 has a simple structure in which both the upper and lower parts of the pivot 53 are supported, the pivot 5
3 can be easily fixed.

In each of the above embodiments and its modifications,
The pivot type VCM is such that one end of the pivot is an HD such as a chassis.
The other end is fixed to the case body or a member such as a lower yoke fixed to the case body, and the other end is provided with a damper to the case body such as a top cover or a member such as an upper yoke fixed to the case body via a damper. The vibration gain due to the tilt of the pivot axis of the pivot due to the temporary deformation of the ball of the ball bearing and the vibration due to the deformation of the suspension are improved, and the pivot axis is provided at two points. Therefore, vibration due to eccentricity of the rotation fulcrum shaft does not occur. Therefore, it is possible to widen the bandwidth of the rotary VCM, and it is possible to easily increase the capacity of the HD.

Further, since the pivoting fulcrum shaft of the pivot has a structure in which one end is supported via a damper which is a viscoelastic body, the pivoting fulcrum shaft is vertically fixed directly to the case body or the like. The dimensional accuracy of the pivot can be loosened,
Manufacturing costs can be reduced.

In each of the above embodiments and modifications, one end of the pivoting fulcrum shaft is fixed to the chassis or the yoke fixed to the chassis by screwing. The method of fixing one end of the shaft is not limited to this, and a fixing method such as caulking or bonding may be used.

[0061]

As is apparent from the above description, in the disk storage device of the present invention, one end of the pivot shaft is directly fixed to the case body of the disk storage device or a member fixed to the case body. At the same time, the other end is supported via a viscoelastic body, so that vibration due to the tilt of the rotation fulcrum shaft and vibration due to deformation of the suspension can be reduced, and the rotation type VCM can have a wider band. This makes it possible to easily increase the capacity of the disk storage device.

Further, since the rotation fulcrum shaft has a structure in which one end is supported via a damper which is a viscoelastic body, both the rotation fulcrum shaft and the upper and lower shafts are directly fixed to the case body or the like. The dimensional accuracy of the shaft member can be moderated, and the manufacturing cost can be reduced.

It should be noted that the specific shapes and structures of the respective parts shown in the above embodiments are merely examples of the embodiment of the present invention, and the technical scope of the present invention is thereby reduced. It should not be interpreted restrictively.

[Brief description of the drawings]

FIG. 1 shows a first embodiment in which a disk storage device of the present invention is applied to a hard disk device together with FIGS. 1 to 4, and FIG. 1 is a perspective view schematically showing a disk storage device.

FIG. 2 is an enlarged longitudinal sectional view showing a main part.

FIG. 3 is an enlarged longitudinal sectional view showing a shaft member.

FIG. 4 is a diagram showing a transfer function of a rotating voice coil motor in a rotating direction.

FIG. 5 is a longitudinal sectional view showing a problem in the first embodiment.

FIG. 6 is a longitudinal sectional view of a main part showing a first modification of the first embodiment.

FIG. 7 is a longitudinal sectional view of a main part showing a second modification of the first embodiment.

FIG. 8 is a longitudinal sectional view showing a third modification of the first embodiment.

FIG. 9 is a longitudinal sectional view showing a fourth modification of the first embodiment.

FIG. 10 is a longitudinal sectional view showing a second embodiment in which the disk storage device of the present invention is applied to a hard disk device.

FIG. 11 is a longitudinal sectional view showing a third embodiment in which the disk storage device of the present invention is applied to a hard disk device.

FIG. 12 shows an example of a conventional disk storage device together with FIGS. 13 to 16, and is a perspective view of a rotary voice coil motor.

FIG. 13 is a longitudinal sectional view showing an example of a method of attaching a shaft member to a case body.

FIG. 14 is a longitudinal sectional view showing another example of a method of attaching the shaft member to the case body.

FIG. 15 is a diagram illustrating a transfer function in a rotating direction of a rotating voice coil motor using the shaft member illustrated in FIG. 13;

16 is a diagram showing a transfer function in a rotating direction of a rotary voice coil motor using the shaft member shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Disk storage device, 2 ... Case body, 3 ... Case body,
4 disk for recording / reproduction, 5 driving mechanism, 6 shaft member,
Reference numeral 7: arm, 17: pivot shaft, 19: viscoelastic body, 21
... Shaft member, 22 ... Rotating fulcrum shaft, 23 ... Member (yoke) fixed to case body, 25 ... Member (yoke) fixed to case body, 40 ... Disk storage device, 41 ... Shaft member,
42: a member (yoke) fixed to the case body, 45: viscoelastic body, 46: rotation fulcrum shaft, 50: disk storage device,
53: shaft member, 54: rotation fulcrum shaft, 55: member fixed to the case body

Claims (6)

[Claims] An arm having a recording / reproducing head which is rotatably supported on a shaft member having a rotation fulcrum shaft as a rotation center, and which is rotated by a driving mechanism; In a disk storage device in which the recording / reproduction head moves on a recording / reproduction disk, one end of a pivot shaft is attached to a case body of the disk storage device or a member fixed to the case body. Is directly fixed, and the other end is supported via a viscoelastic body. 2. The rotation fulcrum shaft is characterized in that one end is fixed to the case body by screwing, and the other end is supported by the case body by sandwiching a viscoelastic body therebetween. The disk storage device according to claim 1. 3. The rotating fulcrum shaft has one end fixed to the case body by screwing and the other end supported by a yoke fixed to the case body by sandwiching a viscoelastic body therebetween. 2. The disk storage device according to claim 1, wherein: 4. A rotation fulcrum shaft having one end fixed to a yoke fixed to the case body by screwing, and the other end holding a viscoelastic body between the yoke fixed to the case body and the yoke. The disk storage device according to claim 1, wherein the disk storage device is supported by: 5. A rotating fulcrum shaft is fixed at one end to a yoke fixed to the case body by screwing, and the other end is fitted into a support hole provided in the yoke via a viscoelastic body. The disk storage device according to claim 1, wherein the disk storage device is supported by: 6. One end of the rotation fulcrum shaft is directly fixed to the case body by a fixing screw fixed to the case body, and the other end is supported by the fixing screw via a viscoelastic body. 2. The disk storage device according to claim 1, wherein: