JP2985417B2 - Optical disk drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk device,
More particularly, the present invention relates to an optical disk device having improved mechanical vibration of a spindle rotation system and a carriage drive system.

[0002]

2. Description of the Related Art Conventionally, this type of optical disc apparatus is shown in FIG.
As shown in FIG. 7, a base plate 21 is mounted on a frame 13 via a vibration-proof rubber 9. The spindle 2 and the optical head 11 for supporting and rotating the optical disk 6 accommodated in the cartridge 5 are attached to the base plate 21. A carriage 10 for performing a positioning operation is provided.

The spindle 2 is composed of a spindle hub 3, a spindle shaft 8 and a motor 14. The spindle hub 3 has a magnet 4 disposed on a surface of the optical disk 6 facing the hub 7.
Is mounted on the spindle hub 3 of the spindle 2 by fitting the hub 7 and the spindle shaft 8, and is positioned and fixed on the spindle 2 by the attraction force of the magnet 4.

The carriage 10 has an optical head 11 mounted thereon and performs a linear reciprocating motion in the radial direction with respect to the optical disk 6. The linear reciprocating motion of the carriage 10 is performed by the cooperative action of a magnetic circuit 12 constituted by a permanent magnet and a coil (not shown) connected to the carriage 10.

[0005] The optical disk device thus configured is
It works as follows. First, when the optical disk 6 started by the motor 14 is rotating together with the spindle 2 and a positioning command is received from a host device of the optical disk device, the carriage 10 is instructed by a positioning control circuit (not shown) to perform a seek operation. The operation is performed, and recording / reproducing of information to / from the optical disk 6 is performed by the optical head 11 at the specified position.

[0006]

In the above-mentioned conventional optical disk apparatus, the optical disk 6 is formed by fitting the outer diameter of the spindle 2 made of metal (specifically, stainless steel) of the spindle 2 to the inner diameter of the hub 7 of the optical disk 6. Is spindle 2
It is mounted so as to be positioned in the radial direction, is axially positioned and supported on the metal spindle hub 3, and is positioned and fixed on the spindle 2 by the attraction force of the magnet 4. , The spindle 2, the carriage 10, and the magnetic circuit 12 are mounted on only one base plate 21, so that the vibration of the rotation drive system of the spindle 2 is directly transmitted to the optical disk 6.

Further, when the vibration of the rotation drive system of the motor 14 of the spindle 2 and the positioning operation of the optical head 11 for recording / reproducing information with respect to the optical disk 6 are performed, the magnetic circuit 12 for driving the carriage 10 receives the vibration. Since the vibration generated by the reaction force, that is, the vibration of the positioning drive system is transmitted onto the same base plate 21, a displacement occurs between the optical disk 6 and the optical head 11 to write / read information.
There is a disadvantage that a read operation is likely to malfunction.

An object of the present invention is to provide an optical disk apparatus which prevents vibrations of a spindle rotation drive system from being directly transmitted to an optical disk and suppresses a displacement between an optical disk and an optical head.

[0009]

In order to achieve the above object, in an optical disk apparatus according to the present invention, a spindle rotating mechanism for rotating an information recording optical disk through a positioning centering portion, An optical head for recording / reproducing information, a carriage for holding and positioning the optical head, and a base plate for mounting the spindle rotation mechanism and the carriage, wherein the positioning centering portion is provided on the optical disc. A hub provided in advance is fitted on the spindle shaft of the spindle rotating mechanism, the optical disc is supported by the spindle hub of the spindle rotating mechanism, and a vibration damping member is further provided on an outer diameter surface of the spindle shaft. It is provided.

Further, a vibration absorbing member is provided on the surface of the spindle hub for supporting the optical disk.

The base plate includes a first base plate on which the spindle rotating mechanism is mounted, and a second base plate on which the carriage is mounted. The first and second base plates are connected via an elastic member. Are combined.

[0012]

The vibration damping member is provided on the outer periphery of the spindle shaft of the spindle on which the optical disc is positioned and mounted, and the vibration absorbing member is provided on the spindle hub surface. Further, the base plate for fixing the spindle and the base plate for disposing the carriage are separated, and the two base plates are connected via an elastic member.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view showing one embodiment of the present invention.

In FIG. 1, the optical disk device of the present invention has a base plate 1 and a base plate 16 mounted on a frame 13 via a vibration-proof rubber 9. And
A carriage 10 and a magnetic circuit 12 for performing a positioning operation by attaching an optical head 11 are disposed on the base plate 1, and a cartridge 5 is mounted on the base plate 16.
The spindle 2 for supporting and rotating the optical disk 6 housed in the optical disc 6 is provided.

The spindle 2 comprises a spindle hub 3, a spindle shaft 8 and a motor 14, and a vibration damping member 18 is provided on the outer periphery of the spindle shaft 8 which is fitted and positioned with the hub 7 of the optical disk 6. In addition, a vibration absorbing member 17 is disposed on the surface of the spindle hub 3 for positioning and supporting the optical disk 6 in the axial direction.
The optical disk 6 is positioned and fixed on the spindle hub 3 by the attraction force of the magnet 4.

The construction and operation of the carriage 10 and the magnetic circuit 12 are the same as in the conventional example.

With the above configuration, the optical disk 6 mounted on the spindle 2 can
A vibration damping member 18 provided on the outer peripheral surface of the spindle shaft 8 without directly transmitting the vibration of the rotary drive system of
With the function of the vibration absorbing member 17 provided on the surface of the spindle hub 3, the vibration of the rotary drive system of the spindle 2 is transmitted in an attenuated form. And spindle 2
Is fixed to the base plate 1 on which the carriage 10 is mounted by means of an elastic member 15, and the system of the vibration of the rotary drive system and the vibration of the positioning drive system is separated. Have been.

[0019]

As described above, in the optical disk apparatus of the present invention, the vibration damping member is provided on the outer periphery of the spindle shaft of the spindle on which the optical disk is positioned and mounted, and the vibration absorbing member is provided on the surface of the spindle hub to drive the spindle rotationally. Vibration of the system can be prevented from being directly transmitted to the optical disk.

Further, since a base plate for fixing the spindle and a base plate for arranging the carriage are provided independently, and the connection with both base plates is made via an elastic member, the vibration and positioning of the rotary drive system can be attained. The system with the vibration of the drive system is separated, the displacement between the optical disk and the optical head can be minimized, and the reliability of writing and reading of information can be extremely low without malfunction. There is an effect that a high optical disk device can be provided.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing a conventional example.

[Explanation of symbols]

 Reference Signs List 1 base plate 2 spindle 3 spindle hub 6 optical disk 8 spindle shaft 10 carriage 11 optical head 15 elastic member 16 base plate 17 vibration absorbing member 18 vibration damping member

Claims (3)

(57) [Claims] A spindle rotating mechanism for rotating an information recording optical disk via a positioning centering portion; an optical head for recording / reproducing information on / from the optical disk; and holding and positioning the optical head. And a base plate on which the spindle rotating mechanism and the carriage are mounted. The positioning centering portion is configured such that a hub provided in advance on the optical disc is fitted to a spindle shaft of the spindle rotating mechanism. An optical disc device, wherein the optical disc is supported by a spindle hub of a spindle rotating mechanism, and a damping member is provided on an outer diameter surface of the spindle shaft. 2. The optical disk device according to claim 1, wherein a vibration absorbing member is provided on a surface of the spindle hub that supports the optical disk. 3. The optical disk device according to claim 1, wherein the base plate includes a first base plate on which the spindle rotation mechanism is mounted, and a second base plate on which the carriage is mounted. The optical disk device according to claim 2, wherein the second base plate is connected via an elastic member.