JPH02273327A - Vibration proof mechanism for disk reader - Google Patents

Abstract

PURPOSE:To correctly read a disk by mutually attracting the auxiliary guide shaft and guide roller of an optical pickup by means of magnetic force, and improving the focusing performance of the optical pickup and the tracing performance of a tracking system. CONSTITUTION:A magnetized auxiliary guide shaft 13 and a magnetic guide roller 14 attached to the guide roller 14 are mutually attracted by the magnetic force. Thus the resonance between the guide roller 14 and the auxiliary guide shaft 13 and the vibration of an optical pickup 10 are largely reduced, and the focusing performance of the optical pickup and the tracing performance of the tracking system can be drastically improved. Consequently read performance for an eccentric or oscillating disk can be drastically improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is for reducing vibrations of an optical pickup in a disc reading device that optically records and reproduces information by projecting an optical beam onto a disc-shaped recording medium. The present invention relates to a vibration isolation mechanism.

2. Description of the Related Art In recent years, disc reading devices such as CD players and CD-
The applications of ROMs, multi-laser players, etc. are diversifying year by year, and are becoming more and more high-performance, high-quality, and high-value-added.In order to play discs accurately, it is becoming more difficult to reduce vibrations in disc readers, optical pick amplifiers, and discs. demands are imposed. ¥1: Disc reader for compact disc playback and CD-R
Regarding OM disk reading devices, the demand for portable and vehicle-mounted devices is on the rise, and it is desired that the vibration resistance of the horizontal layer be improved.

An example of the vibration isolation mechanism of the above-mentioned conventional disc reading device will be described below with reference to the drawings.

FIG. 7 shows a guide mechanism of an optical pickup of a conventional disc reading device. In Fig. 7, 1 is a support base, 2 is a traverse ring, 3 is a spindle motor, 4 is a turntable, 5 is a centering ring, 6 is a clamper, 7 is a floating rubber, 8 is a floating spring, 9id floating screw, 1o is an optical pickup,
11 is an oil-less metal, 12 is a main guide shaft, 13 is an auxiliary guide shaft, 14 is a guide roller, 15 is a guide roller mounting shaft, 16 is a guide roller retaining ring, 17 is a deign, 18 is a yoke to which a magnet is attached, 19 is a coil wound around a bobbin.

The operation of the optical pickup guide mechanism for the disc reading apparatus 9 constructed as shown in FIG. 61 will be described below.

1. First, the main guide shaft 12 and the auxiliary guide shaft 13 are installed with high accuracy in the traverse space 2, and the oil-less metal/L'11 press-fitted into the main guide part of the optical pickup 10 is attached to the optical pickup 10. The guide roller mounting shaft 15, the guide roller 14, and the optical pickup 10 are movable in the tracking direction of the disk. Further, the optical pickup is driven in the tracking direction of the disk by a yoke 18 attached to the traverse space 2 and a coil 19 attached to the optical pickup 1o.

A turn tape/v41) is attached to the spindle motor 3 attached to the traverse space 2 with high precision at a specified height. Turn tape/I/3
A centering ring 6 is removed from the disk, and a disk 17 is attached to the clamper 6 to read the disk. A traverse space 2 is attached to the support base 1 by a floating rubber 7, a floating spring 8, and a floating screw 9, and the rubber space 2 is in a floating state.

While the optical pink-up 10 is in a state of movement in the tracking direction due to the above-mentioned driving device, at the same time, due to the floating mechanism mentioned above, vibrations from the outside such as vibrations from the floor, vibrations/resonance of the exterior case/support base, etc. attenuate or block the
By reducing the vibrations of the disk reading device, optical pickup, and disk, the focusing performance of the optical pickup 10 and the tracking performance of the tracking servo system are greatly improved.

Problems to be Solved by the Invention However, in the above configuration, when reading the disk 17, the traverse space 2 and the auxiliary guide shaft 1 are
The vibration of the optical pickup 1o caused by the resonance between the guide roller 14 and the guide roller 14, and the vibration of the optical pickup 1o caused by the gap between the guide roller 14 and the travertine vane 2 in a disturbance state of 1G or more, adversely affects the tracking performance of the focus and tracking servo system. However, there is a problem in that the readability of the disc 17 is reduced.

In view of the above problems, the present invention reduces the resonance between the guide roller and the auxiliary guide shaft and the vibration of the optical pickup by causing the auxiliary guide shaft and the guide roller of the optical pickup to attract each other by magnetic force. The present invention provides an anti-vibration mechanism that greatly improves the focusing performance of the pickup and the following performance of the tracking servo system and enables accurate disk reading.

Means for Solving the Problems In order to solve the above problems, the present invention provides an optical pickup, a feeding mechanism for moving the optical pickup in the tracking direction of the disk, and a guide for positioning and moving the optical pickup in the tracking direction. a magnetized auxiliary guide shaft that is located parallel to the main guide shaft and assists the movement of the optical pickup in the tracking direction, and a magnetized auxiliary guide shaft that rolls on the auxiliary guide shaft to move the optical pickup in the tracking direction. The optical pickup includes a guide roller made of a magnetic material that assists in the movement of the optical pickup, and a guide roller attachment shaft for attaching the guide roller to the optical pickup.

Operation The present invention has the above-described configuration, and when reading a Deinuk, vibration of the optical pickup occurs due to resonance between the traverse space, the auxiliary guide shaft, and the guide roller, and in a disturbance state of 1 G or more, light due to the gap between the guide roller and the traverse space is suppressed. By pressing the optical pickup's guide roller against the auxiliary guide shaft using the magnetic force of the magnet, the resonance between the guide roller and guide shaft and the vibration of the optical pickup are reduced, and the optical pickup's focus and tracking servo are reduced. The tracking performance of the optical pickup system and the tracking performance of the 1-racking servo system have been greatly improved.
It is possible to greatly improve the ability to read eccentric and wobbling disks.

Embodiment Below, a disk reading device 10 according to an embodiment of the present invention
The vibration isolation mechanism of -/ will be explained with reference to the drawings.

FIG. 1 shows a schematic cross-sectional view of a vibration isolation mechanism of a disc reading device according to a first embodiment of the present invention, and FIG. FIG. 3 shows an exploded perspective view of the vibration isolation mechanism. In Figures 1 and 2, 1 is the support heath, 2 is the rubber space, 3 is the spindle motor, and 4 is the turn tape.
, sid centering ring assembly, 6 is a clamper, 7 is a floating rubber, 8 is a floating spring, 9 is a floating screw, 1o is an optical pickup, 11 is an oil-less metal, 12 is a main guide shaft, 13 is an auxiliary guide shaft, 14
is a guide roller, 15 is a guide roller mounting shaft, 16
17 is a guide roller retaining ring, and 17 is a deinuk. 18 and 19 are the yoke 18 and carp/L' for driving the optical pickup 10 in the tracking direction. 20 is the holding plate A for attaching the main guide shaft 12 and the yoke 18 to 1-rubber space 2, and 21 is the holding plate A20. Holding plate A mounting screw for attaching to Traverse Benu 2, 22
The presser plate B123 for fixing the auxiliary guide shaft 13 is a screw for attaching the presser plate B22 to the traverse space 2.

The operation of the vibration isolation mechanism of the disc reading device constructed as above will be explained below with reference to FIGS. 1 and 2.

First, a turn tape/L/4 is accurately attached to the spindle motor 3 attached to the 1-rubber space 2 at a specified height. A centering ring assembly 5 is attached to the turntap) V3, and a disk 17 is attached to the clamper 6, so that the disk is read.

In addition, a main guide shaft 12 and an auxiliary guide shaft 13 are installed with high accuracy in the traverse space 2, and an oil Renumeta/l/11 press-fitted into the main guide portion of the optical pickup 1o and an oil renumeta/l/11 attached to the optical pickup 1o are installed in the traverse space 2 with high accuracy. The optical pickup 1o is in a state of movement in the tracking direction of the disk 17 due to the guide roller 14 attached to the guide roller attachment shaft 15 without any gap. The gap between the outer diameter of the main guide shaft 12 and the inner diameter of the oil renumerator (vll) is set to the minimum necessary.

Further, the optical pickup 10 is driven in the tracking direction by the yoke 18 attached to the traverse base 2 and the coil 19 attached to the optical pickup 10 .

Further, a traverse space 2 is attached to the support base 1 by a floating rubber 7, a floating spring 8, and a floating screw 9.
is in floating state.

As described above, according to the present embodiment, the magnetized auxiliary guide shaft 13 and the guide roller 14, which is a magnetic body attached to the guide roller 14 without any gap, are attracted to each other by magnetic force. , the resonance between the guide roller 13 and the auxiliary guide shaft 13 and the vibration of the optical pickup 1o are greatly reduced, the focusing performance of the optical pickup 10 and the following performance of the tracking servo system are greatly improved, and the reading ability for eccentric and wobbling discs is improved. It can be greatly improved.

A second embodiment of the present invention will be described below with reference to the drawings.

FIG. 3 is a schematic cross-sectional view of a vibration isolation mechanism of a disc reading device showing a second embodiment of the present invention.

In the figure, reference numeral 24 denotes a guide magnet, which has the same structure as in FIGS. 1 and 2.

The difference from the configuration in FIGS. 1 and 2 is that the auxiliary guide shaft 13 is non-magnetized, and the guide magnet 24
is provided below the auxiliary guide shaft 13.

As described above, the auxiliary guide shaft 13 is made non-magnetized, the guide roller 14 which is a magnetic material is pressed against the auxiliary guide shaft 13 by the magnetic force of the guide magnet 24, and the optical pickup 1
By reducing the zero vibration, foreign matter such as iron will not be attracted to the non-magnetized auxiliary guide shaft 13.
The vibration damping mechanism of the disc reading device according to the present invention can be realized by making the rotation of the guide roller 14 smooth and without adversely affecting the sliding operation of the optical pickup 10.

A third embodiment of the present invention will be described below with reference to the drawings.

FIG. 4 shows a schematic cross-sectional view of a vibration isolation mechanism of a disc reading device showing a third embodiment of the present invention.

In the figure, 25 is an auxiliary magnet, and the rest of the structure is the same as that in FIG. 3. The difference from the configuration shown in FIG. 3 is that the guide roller 14 is made of a non-magnetic material, and that the auxiliary magnet 26 and the guide magnet 24 are attached to the guide roller mounting shaft 15 so as to be attracted to each other.

As described above, the guide roller 14 is made of a non-magnetic material, the auxiliary magnet 26 is attracted by the guide magnet 24,
By pressing the guide roller 14 against the auxiliary guide shaft 13 to reduce the vibration of the optical pickup 1o, the guide roller 14 can be made of a non-magnetic material, and the present vibration isolation mechanism can be constructed at low cost. By selecting the magnetic materials of the groove auxiliary magnet 25 and the guide magnet 24, the attraction force of the guide roller 14 to the auxiliary guide shaft 13 can be strengthened or adjusted.

A fourth embodiment of the present invention will be described below with reference to the drawings.

FIG. 6 is a schematic cross-sectional view of a vibration isolation mechanism of a disc reading device showing a fourth embodiment of the present invention.

In the same figure, 26 is a suction plate, and the above structure is the same as that of FIG. 4.

The difference from the configuration shown in FIG. 4 is that the guide magnet 24 is replaced by an attraction plate 26 made of a magnetic material.

As described above, the suction plate 26 is made of a magnetic material, the auxiliary magnet 25 is suctioned by the suction plate 26 fixed to the Irabane base 2, the guide roller 14 is pressed against the auxiliary guide shaft 13, and the optical pickup 1o is By reducing vibration, the present vibration isolating mechanism can be constructed easily.

A fifth embodiment of the present invention will be described below with reference to the drawings.

FIG. 6 shows a schematic cross-sectional view of a vibration isolation mechanism of a disc reading device showing a fifth embodiment of the present invention.

In the same figure, 27 is a magnetic plate, and the above structure is the same as that of FIG. 4.

What is different from the configuration shown in FIG. 3 is that the auxiliary magnet 25 is made of a magnetic plate 27, and the guide roller mounting shaft 15 is attached so that the magnetic plate 27 and the guide magnet 24 fixed to the traverse space 2 are attracted to each other. This is the point attached to.

As described above, by attracting the magnetic plate 27 to the guide magnet 24 and pressing the guide roller 14 against the auxiliary guide shaft 13 to reduce the vibration of the optical pickup 1o, the present vibration isolation mechanism can be easily achieved. can be configured.

1st. Second. Third. 4th. In the fifth embodiment, the running surface of the guide roller 14 is the auxiliary guide shaft 13, but it may be a plate-shaped running surface.

In the third embodiment, the guide magnet 24 is attached above the auxiliary magnet 25, and the guide magnet 24
The auxiliary magnet 25 and the auxiliary magnet 25 may be configured to repel each other.

In the third embodiment, the guide roller 14 is made of a non-magnetic material, but the guide magnet 24 is attached to the auxiliary guide shaft 13.
If it is below , it may be a magnetic material.

Effects of the Invention As described above, according to the present invention, by magnetically pressing the guide roller, which is attached to the guide roller attachment shaft without any gap, onto the auxiliary guide shaft, the resonance between the guide roller and the auxiliary guide shaft and the optical pickup can be suppressed. It is possible to greatly reduce the vibration of the optical pickup, greatly improve the tracking performance of the optical pickup's focal length and tracking servo system, and greatly improve the reading ability for eccentric and wobbling discs.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of the vibration isolating mechanism of the disc reading device according to the first embodiment of the present invention, FIG. 2 is an exploded perspective view of the vibration isolating mechanism of the disc reading device according to the first embodiment of the present invention, and FIG. The figure is a sectional view of the vibration isolating mechanism of a Dainuk reader in Embodiment 2 of the present invention, FIG. 4 is a sectional view of the vibration isolator of a disc reader in Embodiment 3 of the present invention, and FIG. FIG. 6 is a sectional view of the vibration isolating mechanism of the disc reading device according to the fifth embodiment of the present invention;
FIG. 7 is a sectional view of a guide mechanism of an optical pickup of a conventional disc reading device. 1...Support pace, 2...Traver space, 3...Spindle motor, 4...
・・Turntable, 5゛°°゛centering ring, 6・・
... Clamper, 7... Floating rubber, 8... Floating spring, 9...
Floating screw, 10... Optical pickup,
11...Oi/Reless Metal, 12...
・Main guide shaft, 13...Auxiliary guide shaft, 14.
...Guide roller, 15...Guide roller mounting shaft, 16...Guide roller retaining ring, 17
...Disk, 18...Yoke, 19
...Coil, 20...Press plate A119
・ / 21... Holding plate A installation screw, 22...
・・Pressure plate B 23・・・・・Pressure plate B installation screw, 24・・・・Guide magnet, 25・・・・
・Auxiliary magnet, 26...Adsorption plate, 27...
...magnetic plate.

Claims (4)

[Claims] (1) An optical pickup, a feeding mechanism for moving the optical pickup in the tracking direction of the disk, a main guide shaft for guiding the positioning of the optical pickup and movement in the tracking direction, and a main guide shaft located parallel to the main guide shaft. a magnetized auxiliary guide shaft that assists the movement of the optical pickup in the tracking direction; a guide roller that is a magnetic body that rolls on the auxiliary guide shaft and assists the movement of the optical pickup in the tracking direction; and the guide. A vibration isolation mechanism for a disc reading device, comprising a guide roller attachment shaft for attaching the roller to the optical pickup. (2) an optical pickup, a feeding mechanism that moves the optical pickup in the tracking direction of the disk, a main guide shaft that guides the positioning of the optical pickup and movement in the tracking direction, and a main guide shaft that is located parallel to the main guide shaft. an auxiliary guide shaft that assists the movement of the optical pickup in the tracking direction; a guide roller that is a magnetic body that rolls on the auxiliary guide shaft and assists the movement of the optical pickup in the tracking direction; A vibration-proofing device for a disk reading device, comprising: a guide roller mounting shaft for mounting on a pickup; and a guide magnet located below the auxiliary guide shaft for pressing the guide roller against the auxiliary guide shaft. mechanism. (3) an optical pickup; a feeding mechanism for moving the optical pickup in the tracking direction of the disk; a main guide shaft for guiding the movement of the optical pickup in the tracking direction; an auxiliary guide shaft for assisting movement of the optical pickup in the tracking direction; a guide roller rolling on the auxiliary guide axis for assisting movement of the optical pickup in the tracking direction; and a guide for attaching the guide roller to the optical pickup. A roller mounting shaft, an auxiliary magnet attached to the guide roller mounting shaft, and a lower side of the auxiliary magnet are configured to attract each other to the auxiliary magnet, and the guide roller is attracted by magnetically attracting the auxiliary magnet. A vibration isolation mechanism for a disk reading device, comprising a guide magnet or a magnetic suction plate for pressing against the auxiliary guide shaft. (4) an optical pickup; a feeding mechanism that moves the optical pickup in the tracking direction of the disk; a main guide shaft that guides the movement of the optical pickup in the tracking direction; an auxiliary guide shaft for assisting movement of the optical pickup in the tracking direction; a guide roller rolling on the auxiliary guide axis for assisting movement of the optical pickup in the tracking direction; and a guide for attaching the guide roller to the optical pickup. A roller mounting shaft, a magnetic plate which is a magnetic body attached to the guide roller mounting shaft, and a magnetic plate located below the magnetic plate so as to be attracted to each other, and by attracting the magnetic plate with magnetic force. A vibration isolation mechanism for a disc reading device, comprising a guide magnet for pressing the guide roller against the auxiliary guide shaft.