JPH10255453A - Disk driving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk driving device excellent in posture stabilization and damping effect, by constructing a second damping structure to have a space for prevention of contact with a mechanical part or an outer frame cover if a mass eccentricity disk is rotated or external vibration is transmitted, in the device placed in the horizontal posture regarding disk driving device having first and second damping structures. SOLUTION: A disk loading part 301 is built into a mechanical part 101. A front panel opening/closing part 601 is set larger than the width and height of the disk loading part 301. Thus, even if the mechanical part 101 is displaced up and down, disk loading/unloading is stably performed without any contact between the disk loading part 301 and the front panel opening/closing part 601. Between the bottom surface of the mechanical part 101 and an outer frame cover bottom surface 201c, a bottom damper 401 is provided. Right and left side dampers 501a and 501b are respectively fixed/installed in the mechanical part 101.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive using an optical disk or the like, and more particularly, to a disk drive having a mechanism for stably holding a mechanical portion in both horizontal and vertical positions and an optimum vibration-proof structure.

[0002]

2. Description of the Related Art In a disk drive for reading data by using a disk such as a CD (compact disk), a plurality of μm irregularities provided on the disk are optically scanned and converted into data. When external vibration is applied to the disk drive device, the data reading unit cannot follow the irregularities, and the data reading becomes defective. In addition, a disk with a deviated center of gravity (hereinafter, abbreviated as an eccentric disk)
Vibration generated when the disk is rotated is transmitted to the outside of the disk drive, and for example, when the disk drive is incorporated in a personal computer, the performance of other devices is affected. For this reason, it is necessary to provide an anti-vibration mechanism between the device housing and the data readout unit to make it difficult for external vibrations to be transmitted to the data readout unit, and to make it difficult for externally generated vibrations to be transmitted to the outside. As an anti-vibration mechanism of this disk drive, for example, Japanese Patent Application Laid-Open No. 3-290892 has been disclosed.
According to the present invention, a first vibration isolating member for elastically connecting the disk playback mechanism and the outer frame portion is provided between the bottom plate of the disk playback mechanism and the bottom plate of the outer frame portion, and a side surface of the disk playback mechanism portion. A second vibration damping member attached to the second vibration damping member, a flat member having a low coefficient of friction provided on one of the side surfaces of the second vibration damping member and the outer frame portion, and a second vibration damping member and A contact member is provided on the other of the one side surface of the outer frame portion, and is substantially point-contacted with the flat plate member. With this configuration, even when the outer frame portion is in the vertical posture, the weight of the disc reproducing mechanism can be supported by the second vibration isolating member. Further, since the plate member and the contact member are brought into substantially point contact with each other, almost no external vibration applied to the outer frame portion is transmitted to the disk reproducing mechanism portion, and a good vibration damping effect can be obtained. Further, since the disk reproducing mechanism is supported from both sides by the second vibration isolation member,
It is safely protected against a large external impact, and the reliability involved in transporting the device can be improved.

[0003]

In the above prior art, the vibration isolating members are provided on the bottom surface of the disk reproducing mechanism and the bottom surface of the outer frame, and on the side surfaces of the disk reproducing mechanism and the outer frame. This was effective for vibration isolation when the device was in a vertical position.

However, the anti-vibration mechanism formed on the side surface connects the disk reproducing mechanism and the outer frame even when the apparatus is in a horizontal position, and the entire apparatus has many contact portions between the disk reproducing mechanism and the outer frame. Therefore, vibration is easily transmitted from the outside to the inside or from the inside to the outside, which has a problem of adversely affecting the disk reproduction.

[0005] Further, since the anti-vibration mechanism formed on the side surface is supported by substantially point contact, when the apparatus is placed in a vertical position, it is displaced downward by the weight of the disk reproducing mechanism and at the same time the disk reproducing mechanism moves vertically at the center of gravity. If a point contact position is not set in the direction extension, the disc reproducing mechanism will be tilted and supported. For this reason, if there is not enough clearance between the disc reproducing mechanism and the outer frame, a part of the disc reproducing mechanism may be displaced by external vibration or vibration generated when the eccentric disc is rotated. Interference and collision occur, and vibrations that adversely affect disk reproduction are newly generated.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a disk drive device which stabilizes the posture of a mechanical unit including a data readout unit and has an excellent vibration proof effect even when the device is in a vertical posture.

[0007]

In order to achieve the above object, the present invention provides a first vibration isolation structure between a bottom surface of a mechanical unit including a data reading unit and a bottom surface of an outer frame cover. A second vibration isolation structure fixed to either the mechanical unit or the outer frame cover is provided between the left and right side surfaces of the unit and the left and right side surfaces of the outer frame cover. In the second vibration isolating structure, when the device is in a horizontal position, either the second vibration isolating structure, the mechanical unit or the outer frame cover is required even if the eccentric disk is rotated or external vibration is transmitted. With a gap that does not make contact. Further, the second anti-vibration structures are arranged at four or more locations at substantially equal intervals in the horizontal and vertical directions with the center of gravity of the mechanical unit as the center.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view of a disk drive according to a first embodiment of the present invention when viewed from the front in a horizontal posture. Reference numeral 101 denotes a mechanical unit including a data reading unit (not shown). Is an outer frame cover, 201a is a right side surface of the outer frame cover, 201b is a left side surface of the outer frame cover, 201c is a bottom surface of the outer frame cover, 301 is a disk loading portion,
01 is a bottom damper, 501a is a right side damper, 50
1b is a left side damper, and 601 is a front panel opening / closing unit.

The disk loading section 301 is a mechanical section 1
01. The front panel opening / closing unit 60
1 is set to be larger than the width and height of the disc loading section 301. With this configuration, the mechanical unit 1
Even when 01 is displaced up, down, left, and right, the disc loading section 301 does not come into contact with the front panel opening / closing section 601 and the disc can be taken in and out stably. A bottom damper 401 is provided between the bottom of the mechanical unit 101 and the bottom 201c of the outer frame cover. The right side damper 501a and the left side damper 501b are fixed and installed on the right and left side surfaces of the mechanical unit 101, respectively. Right side damper 501a and left side damper 5
Reference numeral 01b denotes a structure in which the disk drive device does not come into contact with the outer frame cover 201 when the disk drive device is in a horizontal position, even when vibration is applied from the outside or when the eccentric disk is rotated at the maximum rotation speed of the device. That is, the right side damper 501a and the right side surface 201a of the outer frame cover, and the left side damper 501b and the left side surface 201b of the outer frame cover are provided with a constant interval m, and the mechanical unit 101 is supported only by the bottom damper 401.

With the above configuration, when the disk drive is in the horizontal position, the mechanical section 101 including the right side damper 501a and the left side damper 501b does not contact the outer frame cover 201, and the bottom damper 401 moves from inside to outside or outside. It plays a role of suppressing vibration transmission from inside to the inside.

Next, the configuration of each member when the disk drive is placed in a vertical position will be described.

FIG. 2 is a sectional view of the disk drive device of the first embodiment shown in FIG. 1 when viewed from the front in a vertical posture in which the right side surface 201a of the outer frame cover is in contact with the floor surface.

When the disk drive is in a vertical position,
The bottom damper 401 is deformed by the weight of the mechanical unit 101, and the mechanical unit 101 is displaced downward. At this time, the right side damper 501a comes into contact with the right side surface 201a of the outer frame cover and enters a compressed state. That is, the mechanical unit 101 is supported by the bottom damper 401 and the right side damper 501a.

In the above configuration, unlike the horizontal attitude of the disk drive device, since the bottom damper 401 is deformed, the effect of suppressing vibration transmission from inside to outside or from outside to inside is reduced. . By supplementing this, the right side damper 501a plays a role of suppressing vibration transmission. Thus, both the bottom damper 401 and the right side damper 501a suppress the transmission of vibration from inside to outside or from outside to inside. Also, the bottom damper 401 is in a vertical position and the center of gravity of the mechanical unit 101 is raised, so that the mechanical unit 101 is in an unstable state and vibration is applied from the outside or when the eccentric disk is rotated, Upper surface of part 101 and outer frame cover 20
1 is prevented from contacting the upper surface.

Next, the arrangement of the right side damper 501a will be described.

FIG. 3 is a sectional view of the disk drive of the first embodiment shown in FIG. 1 when viewed from the right side in a horizontal posture. G indicates the position of the center of gravity of the mechanical unit 101.

The right side damper 501a is disposed at substantially equal intervals in the horizontal and vertical directions with respect to the center of gravity G of the mechanical unit 101, with distances of h and v, respectively. In the present embodiment, it is arranged at four places, but may be arranged at four or more places.

With the above configuration, when the apparatus is in the vertical position, the mechanical unit 101 is stably held by the center of gravity G of the mechanical unit 101 and the arrangement of the right side damper 501a. The mechanical unit 101 and the outer frame cover 201 do not come into contact with each other even when vibration is generated. Similarly, when the eccentric disk is rotated, the mechanical unit 101 and the outer frame cover 201 do not come into contact with each other, so that data can be read reliably.

The configuration and effects of the right side damper 501a in the vertical position in which the outer frame cover left side surface 201b is in contact with the floor surface are the same as those of the right side damper 501a, and a description thereof will be omitted.

FIG. 4 is a cross-sectional view of a disk drive according to a second embodiment of the present invention when viewed from the front in a horizontal posture, and 701a is a right side damper, 701b
Is the left side damper.

The disk loading section 301 is the mechanical section 1
01. The front panel opening / closing unit 60
1 is set to be larger than the width and height of the disc loading section 301. With this configuration, the mechanical unit 1
Even when 01 is displaced up, down, left, and right, the disc loading section 301 does not come into contact with the front panel opening / closing section 601 and the disc can be taken in and out stably. A bottom damper 401 is provided between the bottom of the mechanical unit 101 and the bottom 201c of the outer frame cover. The right side damper 701a and the left side damper 701b are respectively a right side surface 201a of the outer frame cover and a left side surface 2 of the outer frame cover.
01b is fixed and installed inside. The right side damper 701a and the left side damper 701b do not contact the mechanical unit 101 when the disk drive device is in a horizontal position, even when vibration is applied from the outside or when the eccentric disk is rotated at the maximum rotation speed of the device. It has become. That is, the right side damper 701a and the right side surface of the mechanical unit 101,
The left side damper 701 b and the left side surface of the mechanical unit 101 are provided with a fixed distance n, and the mechanical unit 101 is supported only by the bottom damper 401.

With the above configuration, when the disk drive device is in the horizontal posture, the outer frame cover 201 including the right side damper 701a and the left side damper 701b does not contact the mechanical unit 101, and the bottom damper 401 moves from inside to outside or outside. It plays a role of suppressing vibration transmission from inside to the inside. Hereinafter, the configurations and effects of the right side damper 701a and the left side damper 701b when the apparatus is set in the vertical posture are the same as the configurations and effects shown in the first embodiment, and thus description thereof will be omitted.

[0024]

According to the present invention, the following effects can be obtained. That is, a bottom damper is provided between the bottom surface of the mechanical unit including the data reading unit and the bottom surface of the outer frame cover, and the side damper is provided with a gap between the left and right side surfaces of the mechanical unit and the inner sides of the left and right side surfaces of the outer frame cover. In the horizontal position, the mechanical part is supported only by the bottom damper, so external vibrations are prevented by the bottom damper, data can be read reliably, and even if the eccentric disc is rotated, The damper does not contact the outer frame cover, and the transmission of vibration from the inside of the device to the outside is suppressed.

Also, since the side dampers are arranged at four or more locations at substantially equal intervals in the horizontal direction and the vertical direction with the center of gravity of the mechanical portion as the center, the mechanical portion is stably held even in the vertical posture. In addition, even when vibration is applied from the outside or the eccentric disk is rotated, the bottom damper prevents the upper surface of the mechanical unit from contacting the upper surface of the outer frame cover, so that the data can be reliably read.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a disk drive device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the disk drive device in a vertical posture.

FIG. 3 is a cross-sectional view of the disk drive device when viewed from the right side in a horizontal posture.

FIG. 4 is a sectional view showing a disk drive device according to a second embodiment of the present invention.

[Explanation of symbols]

 Reference numeral 101: mechanical part, 201: outer frame cover, 301: disk loading part, 401: bottom damper, 501a: right side damper, 501b: left side damper, 601: front panel opening / closing part.

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Nagaichiro Kuichiro 292, Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside the Multimedia Systems Development Division of Hitachi, Ltd. (72) Inventor Hisahiro Miki 1410 Inada, Hitachinaka-shi, Ibaraki Hitachi, Ltd. Visual Information Media Division

Claims (3)

[Claims] A first vibration isolating structure provided between a bottom surface of a mechanical unit including a data reading unit and a bottom surface of an outer frame cover;
In a disk drive device having a second vibration isolation structure provided between a side surface of the mechanical unit and a side surface of the outer frame cover, the second vibration isolation structure is fixed to both left and right side surfaces of the mechanical unit. And a clearance between the left and right sides of the outer frame cover and a gap. 2. The disk drive device according to claim 1, wherein the second vibration isolating structure is provided at four or more locations at substantially equal intervals in the horizontal and vertical directions about the center of gravity of the mechanical portion. 3. The disk drive device according to claim 1, wherein the second vibration isolating structure is fixed inside right and left side surfaces of the outer frame cover and has a clearance with left and right side surfaces of a mechanical unit.