JPH11144448A - Magnetic or optical disk apparatus including apparatus vibration reducing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable rotating operation control and high speed access of a disk apparatus generated during the seek operation by providing a structure that vibration of the apparatus itself can be reduced by providing a plate spring between a cabinet of the disk apparatus and a mounting member for mounting it. SOLUTION: Parallel plate springs 14a, 14b are arranged between a mounting member 13 and a base 1 of the magnetic disk apparatus. Rigidity in the parallel movement direction of the parallel plates 14a, 14b is set lower than the frame 15 and rigidity in the rotating direction and the other direction is set equal to or larger than that of a frame 15. Thereby, movement of the parallel plate springs 14a, 14b is easy in the parallel moving direction but is difficult in the rotating direction. Vibration of the parallel plates 14a, 14g and base 1 is mainly controlled by the parallel direction movement not giving any influence on the positioning of magnetic head. Therefore, movement of base 1 increases in the parallel moving direction. Here, since a repulsion force of drive is equal and total movement is also equal, the rotating movement is reduced as much as an increment of the parallel, direction movement, realizing the control thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic or optical disk device, and more particularly, to a disk device having a device vibration reduction structure which allows high-speed access.

[0002]

2. Description of the Related Art A magnetic disk drive is designed to increase the recording density to increase the storage capacity and to increase the head access speed to increase the data transfer rate. As a conventional technique for realizing a high recording density, there is one disclosed in Japanese Patent Application Laid-Open No. 6-20440. This is a technique for reducing the device vibration of a predetermined disk rotation frequency component by optimally designing and using a member called a vibration isolation mount. Specifically, the excitation force generated when the disk drive motor rotates in an unbalanced state is canceled by the plurality of vibration isolation mounts.

[0003]

However, the above-mentioned prior art does not consider frequencies other than disk rotation. That is, the head access operation of the magnetic disk device includes a seek operation for moving the head at high speed near the target position and a settling operation for positioning the head at the target position. In the seek operation, the voice coil motor of the head actuator serves as a driving force. Then, the magnetic disk device vibrates due to the reaction force of the driving force. This vibration is a rigid vibration due to the magnetic disk device being installed on a frame or the like. In other words, the vibration is such that the frame or the like becomes a spring and the magnetic disk device itself becomes a mass.

The motion of the magnetic disk drive when vibrating can be divided into a rotational motion and a translational motion. The rotational motion adversely affects the positioning of the head, and the settling operation takes a long time. There's a problem. Translational motion is not affected because the center of gravity of the head actuator is designed and manufactured to coincide with its center of rotation. Further, in the seek operation, the required time changes according to the moving distance of the head. Generally, the time is about 1 ms to several tens ms. Therefore, the vibration frequency applied to the magnetic disk device by the seek operation cannot be constant. From the above, in order to shorten the time of the settling operation, it is necessary to suppress the rotational movement of the magnetic disk device regardless of the excitation frequency.

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic or optical disk device having a device vibration reduction structure capable of suppressing the rotational movement of a disk device caused by a seek operation and enabling high-speed access.

[0006]

The above object is achieved as follows. The invention according to claim 1 is characterized in that a structure is adopted in which a leaf spring is provided between a housing of the disk device and an installation member for installing the housing, thereby reducing vibration of the device itself. Therefore, the rotational movement of the device is suppressed, and high-speed access is enabled. The invention according to claim 2 has a structure in which vibration of the device itself is reduced by providing a parallel leaf spring between a housing of the magnetic disk device and an installation member for installing the housing. Therefore, the rotational movement of the magnetic disk device itself is suppressed, and high-speed access is possible. Further, the invention according to claim 3 includes a magnetic disk as a recording medium, a magnetic head for performing a recording or reproducing operation on the magnetic disk, a motor for generating a driving force for moving the magnetic head, By providing a parallel leaf spring between a housing of a magnetic disk device having a coil that is a component part of a motor and an installation member for installing the housing,
A structure for reducing vibration of the device itself, and a magnetic circuit as another component of the motor is attached to the installation member. According to the magnetic disk device of this structure, the rotational motion of the device itself can be further suppressed due to the influence of the vibration mode of the magnetic circuit, and thus high-speed access becomes possible. The invention according to claim 4 is characterized in that an attenuation member is provided between the magnetic circuit and the installation member. Thus, the vibration amplitude of the rotational motion can be further reduced by the damping member, and the high-speed access performance is improved. According to a fifth aspect of the present invention, a parallel leaf spring is provided between the magnetic circuit and the installation member. Thereby, in the vibration mode of the magnetic circuit, the translational motion due to the parallel leaf spring increases, and the rotational motion is further suppressed. According to a sixth aspect of the present invention, there is provided a magnetic disk as a recording medium, a magnetic head for performing a recording or reproducing operation on the magnetic disk, and a direct drive type for generating a driving force for moving the magnetic head. A rotating spring is provided between a housing of a magnetic disk device having a motor and an installation member for installing the housing, thereby reducing the vibration of the device itself. is there. According to the magnetic disk drive of this structure, in the case of a linear motion motor, translational motion that adversely affects positioning is suppressed by the rotary spring, and high-speed access performance is improved. According to a seventh aspect of the present invention, the rotary spring is a cross leaf spring. Therefore, the structure is simple, and the rotating member can be easily rotated with respect to the installation member. Further, the present invention provides a disk as a recording medium, an optical head for performing a recording or reproducing operation on the disk, and a direct-acting motor for generating a driving force for moving the optical head. And a structure in which a rotation spring is provided between a housing of the optical disk device having the above structure and an installation member for installing the housing, thereby reducing the vibration of the device itself. According to this configuration, in an optical disc device in which a direct-acting motor is the mainstream, translational motion that adversely affects positioning is suppressed by the rotary spring, and high-speed access performance is improved. According to a ninth aspect of the present invention, the rotary spring is a cross leaf spring. Therefore, the structure is simple, and the rotating member can be easily rotated with respect to the installation member.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of the present invention.
This will be described with reference to FIG. In this embodiment, a parallel leaf spring 14 is provided between an installation member 13 for installing a magnetic disk device and a housing of the magnetic disk device.

FIG. 1 is a perspective view of the magnetic disk drive according to the present embodiment, and FIG. 2 is a side view seen from the direction A.
Parallel leaf springs 14a, 14b are fixed to the base 1 by spring retainers 17a, 17b, and the installation member 1 is
3a and 13b are fixed. Parallel leaf springs 14a, 1
4b, installation members 13a, 13b, spring retainers 17a,
17b and the base 1 are fixed by any method such as bonding, welding, and screws. Installation member 13
A and 13b are provided with screw holes. These screw holes are for attaching the magnetic disk device to a frame or the like inside a personal computer or the like. The housing of the magnetic disk drive includes a base 1 and a cover (not shown).
The control circuit board 12 is fixed to the base 1 together with a spacer or the like (not shown). In the conventional magnetic disk drive, the screw hole is provided directly in the housing.

Referring to FIG. 3, the internal configuration of the magnetic disk drive will be described. A spindle motor 3 that rotates at a predetermined speed is fixed to the base 1. Spindle motor 3
, A magnetic disk 6 as a recording medium is fixed. A bearing body 2 is fixed to the base 1 in a lateral direction of the magnetic disk 6 fixed to the spindle motor 3 so that the axis is parallel to the spindle motor 3. Arm 8 holding slider 9 on which magnetic head is mounted
Is fixed to the carriage 7. Power for moving the magnetic head is generated by a voice coil motor. A coil (not shown), which is a component of the voice coil motor, is fixed to the carriage 7. A magnetic circuit 4 as another component is fixed to the base 1.

The voice coil motor controls the direction and magnitude of the oscillating torque acting on the carriage 7 by appropriately controlling the direction and time of energization of the coil fixed to the carriage 7, and thereby controls the magnetic head. At a desired position on the magnetic disk 6. FPC (FlexiblePr) attached to a curved shape
The integrated circuit 5 has one end fixed to the carriage 7 and the other end fixed to the base 1 via the FPC fixing member 10. A signal line of a magnetic head and a power line of a coil are wired to the FPC 5, and are connected to a control circuit board 12 via a connector 11. The spindle motor 3, magnetic disk 6, bearing 2, slider 9, arm 8, carriage 7, voice coil motor, F
The PC 5, the FPC fixing member 10, the connector 11, and the like are housed in a closed space formed by the base 1, a cover (not shown), screws and the like.

FIG. 4 is a schematic diagram showing a state in which a conventional magnetic disk drive is mounted on a frame 15 inside a personal computer or the like. The installation member of the conventional magnetic disk drive is integral with the base 1 serving as a housing, and the base 1 is directly provided with a screw hole. Most of the material of the frame 15 is an aluminum plate or plastic. Although the shape is various, when a magnetic disk device is attached thereto, the schematic configuration is as shown in FIG.

The access operation of the magnetic disk device includes a seek operation for moving the magnetic head to a position near the target position at a high speed;
There is a settling operation for positioning at the target position. In the seek operation, the voice coil motor becomes the driving force. And
The reaction of the driving force causes the magnetic disk device to vibrate.

FIG. 5 shows a transmission path of the driving reaction force. Arrows indicate transmission of the driving reaction force. The reaction force is transmitted from the carriage 7 to the base 1 via the bearing 2, and is also transmitted from the magnetic circuit 4 to the base 1. These two reaction forces have the same magnitude and are opposite to each other, and a moment acts on the base 1 which is a housing. As a result, the entire magnetic disk device vibrates.

This vibration is a rigid vibration caused by the installation of the magnetic disk device on the frame 15. In other words, the vibration is such that the frame 15 becomes a spring and the magnetic disk device becomes a mass. The motion of the magnetic disk drive when vibrating can be divided into rotational motion and translational motion. Among them, the rotational motion adversely affects the positioning of the magnetic head is the rotational motion, and the settling operation takes a long time. There is. The reason that the translation does not affect is that the center of gravity of the movable part including the magnetic head is designed and manufactured so as to coincide with the center of rotation. Further, since the driving reaction force is a moment as described above, the circuit motion is dominant in the conventional magnetic disk drive.

FIG. 6 is a conceptual diagram showing a state in which the magnetic disk device of the present invention is mounted on a frame 15 of a personal computer or the like, and FIG. 7 shows a transmission path of a driving reaction force in this case. According to the present invention, parallel leaf springs 14a and 14b are provided between an installation member and a housing of a conventional magnetic disk drive. According to the configuration of FIG. 6, the parallel leaf springs 14a, 1
The presence of 4b increases the number of vibration modes. The reason is described below. As shown in FIG. 7, until the driving reaction force is transmitted to the base 1, it is the same as the conventional FIG. The moment transmitted from the base to the parallel leaf spring 14 is
The light is transmitted to the frame 15 via the parallel leaf spring 14.
As a result, the rotational movement that has occurred in the past occurs.

However, the difference from the prior art is that the parallel leaf spring 1
4, the vibration of the parallel leaf spring 14 and the housing (base 1) is generated by the rotational motion as an exciting force. This vibration is the aforementioned increased vibration mode. It is desirable that the rigidity of the parallel leaf spring 14 in the translation direction is lower than the rigidity of the frame 15 in the translation direction. The rigidity in the other directions and rotational directions is
5 is preferably equal to or higher than 5, so that the movement of the parallel leaf spring 14 easily moves in the translation direction, but hardly moves in the rotation direction.
The translational motion that does not affect the positioning of the magnetic head is dominant in the vibration of the parallel leaf spring 14 and the housing (base 1).

Accordingly, as compared with the conventional configuration shown in FIG. 4, the movement of the housing increases in the translational direction. Here, since the magnitude of the driving reaction force is the same and the total momentum is the same, the rotational motion is reduced by an amount corresponding to the increase in the translational motion. As shown in FIG. 8, the installation member 13 may be integrated. With the above configuration, it is possible to suppress the rotational movement of the magnetic disk device and to provide a magnetic disk device capable of high-speed access.

JP-A-6-20440 cited in the prior art
In the magnetic disk device disclosed in Japanese Patent Application Laid-Open Publication No. H10-157, the device vibration of a predetermined disk rotational frequency component is reduced by optimally designing and using a member called a vibration isolation mount. Specifically, the excitation force generated by the rotation of the disk drive motor in an unbalanced state,
May be offset by multiple vibration isolation mounts. In this configuration, no effect is obtained when the driving reaction force of the seek having no specific frequency becomes the excitation force. Further, while the above-mentioned publication has a structure in which the device is not vibrated by the vibration isolation mount, a difference of the present invention lies in a structure in which the vibration is positively vibrated in the translation direction.

FIGS. 9 and 10 show a second embodiment of the present invention.
This will be described below. In this embodiment, in the magnetic disk drive of the first embodiment, the magnetic circuit 4 is put out of a closed space formed by the base 1, a cover (not shown), screws and the like, and the magnetic circuit 4 is provided with the damping members 16a and 16b. The magnetic circuit 4 and the base 1 are not directly fixed, and are fixed to the installation member 13 through the intermediary. FIG. 9 shows the magnetic circuit 4
2 is a perspective view of a magnetic disk drive in which the magnetic disk drive is taken out of the closed space and fixed to the installation member 13. FIG. 10 is a conceptual diagram showing a state where the magnetic disk device is mounted on the frame 15.

Although there is a means for installing an attenuating material to reduce vibration, when an attenuating material is installed in a closed space of a magnetic disk drive, gas or dust emitted from the attenuating material may cause a problem. is there. Therefore, there is a limitation on the material of the damping material that can be installed. However, according to the configuration of the present embodiment, the damping member 1 can be used without regard to the restriction of gas and dust.
6, the magnetic circuit 4 can be installed. Therefore, the second
In the movement of the magnetic disk drive of the embodiment, in addition to the effect of the first embodiment, the translational movement can be increased, and the amplitude of the rotational movement vibration generated by the frame 15 acting as a spring can be further reduced. And a magnetic disk device capable of performing the operation.

A third embodiment of the present invention will be described with reference to FIG. In the present embodiment, in the magnetic disk drive of the first embodiment, the magnetic circuit 4 is put out of an enclosed space formed by the base 1, a cover (not shown), screws and the like, and the magnetic circuit 4 is connected to the parallel leaf springs 14c and 14d. Installation member 1 through
3 installed. With this configuration, the number of vibration modes of the magnetic circuit 4 increases in addition to the first embodiment. This mode is a parallel spring 14c,
Since the translational motion is dominant by 14d, the rotational motion can be further suppressed as compared with the first embodiment. Also, in the present embodiment, the damping member 16 may be provided as in the second embodiment. Therefore, the rotational motion of the magnetic disk device of the third embodiment is suppressed, and the translational motion increases. Further, if the damping member 16 is provided, the vibration amplitude of the rotational motion can be reduced, and thus a magnetic disk device capable of high-speed access can be provided.

FIGS. 12 to 14 show a fourth embodiment of the present invention.
This will be described below. The present embodiment is directed to a magnetic disk drive having a direct-acting
A cross spring 19 is provided between the mounting member 13 and the mounting member 13.

FIG. 12 is a conceptual diagram showing a state in which a conventional magnetic disk drive having a direct-acting head actuator is mounted on a frame 15. The carriage 7 that moves linearly is installed on the base 1 via rollers 18. The magnetic circuits 4 are provided on both sides of the carriage 7. The same applies to coils not shown. In the case of the direct acting type, it is the movement of the device in the translation direction that adversely affects the positioning. Then, the driving reaction force does not become a moment, and the vibration of the device in the state of FIG. 12 is dominated by the translation direction. Therefore, in the present embodiment, the structure is such that the rotary movement is positively performed, contrary to the first to third embodiments.

FIG. 13 shows a structure for realizing this, and FIG. 14 is a conceptual diagram showing a state in which this is mounted on the frame 15. The cross spring 19 is composed of 19a and 19
d is arranged on the same straight line, and similarly, 19b and 19c are arranged on the same straight line. By doing so, the base 1 can be easily rotated with respect to the installation member 13. At this time, the rotation center of the rotational movement is the spring 19a.
And the straight line formed by the spring 19d, the spring 19b and the spring 19
c is the intersection of the straight lines that make up. Further, it is necessary to set the position of the intersection point apart from the center of gravity of the apparatus.

It is needless to say that this configuration can be applied not only to a magnetic disk device but also to an optical disk device in which a direct-acting head actuator is the mainstream. According to the above configuration, it is possible to suppress the translational movement of the disk device having the direct-acting head actuator, and to provide a disk device that can be accessed at high speed.

[0026]

According to the present invention, since the rotational movement of the magnetic disk drive is suppressed and the translational movement is increased accordingly, a magnetic disk drive capable of high-speed access can be provided. In a magnetic or optical disk device having a direct-acting head actuator, the translational motion is suppressed, and the rotational motion is increased by that amount, so that a disk device capable of high-speed access can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view of a magnetic disk drive according to a first embodiment of the present invention.

FIG. 2 is a side view of the magnetic disk drive shown in FIG.

FIG. 3 is a plan view of the internal configuration of the magnetic disk device shown in FIG.

FIG. 4 is a conceptual diagram showing a state in which a magnetic disk device according to a conventional technique is mounted on a frame.

FIG. 5 is an explanatory diagram showing a transmission path of a driving reaction force of the magnetic disk device shown in FIG.

FIG. 6 is a conceptual diagram showing a state where the magnetic disk device shown in FIG. 1 is attached to a frame.

FIG. 7 is an explanatory diagram showing a transmission path of a driving reaction force of the magnetic disk device shown in FIG.

FIG. 8 is a conceptual diagram showing a state where the installation members of the magnetic disk device shown in FIG. 1 are integrally attached to a frame.

FIG. 9 is a perspective view of a magnetic disk drive according to a second embodiment of the present invention.

10 is a conceptual diagram showing a state where the magnetic disk device shown in FIG. 9 is attached to a frame.

FIG. 11 is a conceptual diagram illustrating a state where a magnetic disk drive according to a third embodiment of the present invention is mounted on a frame.

FIG. 12 is a conceptual diagram showing a state in which a conventional magnetic disk drive having a direct-acting head actuator is mounted on a frame.

FIG. 13 is a plan view of a magnetic disk drive according to a fourth embodiment of the present invention.

14 is a conceptual diagram showing a state where the magnetic disk device shown in FIG. 13 is attached to a frame.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base 2 Bearing body 3 Spindle motor 4 Magnetic circuit 5 FPC 6 Magnetic disk 7 Carriage 8 Arm 9 Slider 10 FPC fixing member 11 Connector 12 Control circuit board 13 Installation member 14 Parallel leaf spring 15 Frame 16 Damping member 17 Spring holder 18 Roller 19 Cross leaf spring.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshihiko Shimizu 502, Kandate-cho, Tsuchiura-shi, Ibaraki Pref. Machinery Research Laboratories, Hitachi, Ltd. Machinery Research Laboratory (72) Inventor Shozo Saegusa 2880 Kozu, Odawara City, Kanagawa Prefecture Hitachi, Ltd.Storage System Division (72) Inventor Gomitsu Imai 2880 Kofu, Odawara City, Kanagawa Prefecture Storage System Business, Hitachi, Ltd. Inside (72) Inventor Toshihisa Okazaki 2880 Kozu, Odawara City, Kanagawa Prefecture Within Hitachi Storage Systems Division, Ltd. (72) Inventor Isao Kobayashi 2880 Kozu, Kozuhara, Odawara, Kanagawa Prefecture Storage Systems Division, Hitachi Ltd.

Claims (9)

[Claims] An apparatus characterized in that a vibration of the apparatus itself is reduced by providing a leaf spring between a housing of the disk device and an installation member for installing the housing. A disk device having a vibration reduction structure. 2. A structure in which a vibration of the device itself is reduced by providing a parallel leaf spring between a housing of the magnetic disk device and an installation member for installing the housing. Disk drive having a device vibration reduction structure. 3. A magnetic disk as a recording medium, a magnetic head for performing a recording or reproducing operation on the magnetic disk, a motor for generating a driving force for moving the magnetic head, and components of the motor By providing a parallel plate spring between the housing of the magnetic disk device having the coil and the installation member for installing the housing, the vibration of the device itself is reduced,
A magnetic disk device having a device vibration reduction structure, wherein a magnetic circuit, which is another component of the motor, is attached to the installation member. 4. Between the magnetic circuit and the installation member,
4. The magnetic disk drive according to claim 3, further comprising a damping member. 5. Between the magnetic circuit and the installation member,
4. The magnetic disk drive according to claim 3, further comprising a parallel leaf spring. 6. A magnetic disk as a recording medium, a magnetic head for performing a recording or reproducing operation on the magnetic disk, and a linear motor for generating a driving force for moving the magnetic head. A device vibration reducing structure is provided in which a rotary spring is provided between a housing of the magnetic disk device and an installation member for installing the housing to reduce the vibration of the device itself. Magnetic disk drive. 7. The magnetic disk drive according to claim 6, wherein the rotation spring is a cross leaf spring. 8. An optical disk apparatus comprising: a disk as a recording medium; an optical head for performing a recording or reproducing operation on the disk; and a direct-acting motor for generating a driving force for moving the optical head. An optical disk device having a device vibration reduction structure, wherein a rotation spring is provided between a housing of the device and an installation member for installing the housing to reduce vibration of the device itself. . 9. The optical disk device according to claim 8, wherein the rotation spring is a cross leaf spring.