JPH10162372A - Tilt adjusting device for optical disk player - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide such a tilt adjusting device, for an optical disk player, that can be applied to a small driving device for a note book type personal computer by adjusting a tilt angle formed by the optical disk and the optical axis of the pickup using a number of tilting screws and elasticity of a spring. SOLUTION: The tilt adjusting device is constituted of a bracket 14 that fixes a spindle motor 12 and that serves as a guide at the time of tilt adjustment, a fixing spring 20 as a medium that fixes the spindle motor 12 while its specific position is retained, a fixing screw 22 that fixes the spindle motor 12 by imparting a constant pressure to the fixing spring 20, an adjusting spring 26 as a tilt adjusting medium installed between the second shaft 24 and the bracket 14, and a tilt adjusting screw 28a, 28b that adjusts the tilt angle while a constant force is applied to the adjusting spring 26; thus, the tilt angle is adjusted that is formed by an optical disk 10 and the optical axis of the pickup 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk player, and more particularly, to an optical disk player, in which a tilt angle between an optical disk and a pickup optical axis can be adjusted so that recording data stored in an optical disk due to high density can be reliably output without errors. The present invention relates to a tilt adjusting device for an optical disc player capable of reproducing.

[0002]

2. Description of the Related Art Normally, an optical disk player does not have a device for adjusting a tilt angle between an optical disk and a pickup optical axis. Therefore, since the dimensions of each related component of the optical disk player are strictly controlled, products are mass-produced. This results in reduced productivity and many rejects. Recently, DVD products related to higher density of recording data have begun to be developed, and with the miniaturization of data pits, the regulation of the tilt angle has become several times more strict than that of a CD-ROM. The tilt angle between the optical disk and the optical axis of the pickup cannot be accurately adjusted only with the optical disk. As a result, the recording data stored on the optical disk cannot be reproduced, and a frequent error occurs when reproducing the recording data on the optical disk.

[0003]

SUMMARY OF THE INVENTION In order to solve such a problem, an object of the present invention is to adjust the tilt angle between the optical disk and the optical axis of the pickup by using a plurality of tilt screws and the elastic force of a spring. , Note book
An object of the present invention is to provide a tilt adjusting device for an optical disc player applicable to a small drive device for a PC.

It is another object of the present invention to provide a tilt adjusting device for an optical disk player that can reliably reproduce data stored on an optical disk without causing an error when reproducing the data.

[0005]

To achieve the above object, the present invention provides a spindle motor for rotating an optical disc, a pickup for reading data on the optical disc while moving in a track direction and a focusing direction, and a pickup for reading data on the optical disc. In an optical disc player device comprising a deck base provided with a transfer system for transferring, the spindle motor is fixed, a bracket serving as a guide at the time of tilt adjustment, and the deck base for fixing the bracket at the time of tilt adjustment. A fixed first shaft and a second shaft, a fixing spring provided on a lower surface of the bracket, and a fixing spring as a medium for fixing the spindle motor while maintaining a fixed position; and the fixing spring. Apply a certain pressure to start the spindle motor A fixing screw to be constant, the second
An adjustment spring as a medium for tilt adjustment, which is installed between the shaft and the bracket, and a tilt adjustment screw for adjusting a tilt angle while applying a constant force to the adjustment spring, The tilt angle between the optical disk and the optical axis of the pickup is adjusted.

[0006]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. First, when adding reference numerals to the components of each drawing, the same components are given the same reference numerals even if they are displayed on other drawings. A detailed description of related known functions and configurations that may unnecessarily obscure the subject matter of the present invention is omitted.

FIG. 1 is a schematic view showing a state in which a spindle motor is fixedly installed on an optical disk player while a tilt angle between a disk and a pickup optical axis is adjusted according to a preferred embodiment of the present invention. FIG. 2 is a sectional view showing in detail the configuration of the "A" portion in FIG.
FIG. 2 is a cross-sectional view showing a configuration of a “B” portion (two places) in FIG. 1 in detail.

As shown in FIG. 1, the optical disk player includes a spindle motor 12 for rotating an optical disk 10 storing data at a predetermined speed, and a track (trac).
a pickup 30 for reading data stored on the optical disc 10 while moving in the direction k) or a focusing direction, and a transfer system installed on the deck base 16 for linearly reciprocating the pickup 30. I have. Here, the transport system includes a pickup 3 for reading data recorded on the optical disc 10.
0, and a guide shaft 32 for guiding the pickup 30 to move linearly when the pickup 30 is moved.
At this time, both ends of the lead screw 46 are fixed by a bushing 36 and a second screw 42, the guide shaft 32 is fixed by a first screw 34, and one side of the lead screw 46 is A sled motor 44 of a driving force for linearly reciprocating is provided, and at this time, a driving force of the sled motor 44 is transmitted to the lead screw 46 by rotation of a first gear and a second gear.

An apparatus for adjusting the tilt angle between the optical disk 10 and the optical axis of the pickup 30 in the optical disk player configured as described above is configured as follows. That is, as shown in FIGS. 1 to 3, a bracket 14 for fixing the spindle motor 12 for rotating the optical disc 10 at a predetermined speed and serving as a guide when adjusting the tilt angle is provided at the lower end of the spindle motor 12 at one end. Will be installed. When adjusting the tilt angle between the optical disk 10 and the optical axis of the pickup 30 on the lower surface of the deck base 16, one first shaft 18 and two second shafts 24 for fixing the bracket 14 are caulked ( caulking).

As shown in FIG. 2, a medium for fixing the spindle motor 12 while maintaining a fixed position is provided on one lower surface of the bracket 14 on which the first shaft 18 is installed. A fixing spring 20 is provided. At this time, a disc spring is used as the fixing spring 20 in order to obtain a large force for a small displacement in a small space,
Also, in order to apply a predetermined force applied from the fixing screw 22 to the bracket 14, the fixing spring 20 is installed such that both side surfaces of the fixing spring 20 contact the lower surface of the bracket 14. A fixed force (pressure: P) is applied to the fixing spring 20 to fix the spindle motor 12.
Is inserted into a hole formed inside the first shaft 18.

As shown in FIG. 3, between the second shaft 24 and the bracket 14, the optical disk 10
An adjustment spring 26 is provided as a medium for adjusting a tilt angle between the pickup 30 and the optical axis. At this time, a disc spring is used as the adjusting spring 26 to obtain a large force for a small displacement in a small space, and a predetermined force applied from the tilt adjusting screws 28a and 28b is applied to the bracket 14. The adjusting spring 2
6 is installed such that both side surfaces thereof come into contact with the upper surface of the bracket 14. Then, in order to adjust the tilt angle between the optical disk 10 and the optical axis of the pickup 30, a constant force is applied to the adjusting spring 26 to adjust the position of the spindle motor 12 within the range of the inclination angle θ of the bracket 14. Tilt adjusting screws 28a and 28b are inserted into holes formed inside the second shaft 24, respectively. At this time, the tilt adjusting screws 28a, 28b
As shown in FIG. 1, a first tilt screw 28a for adjusting a tilt angle in a radial direction between the optical disk 10 and the optical axis of the pickup 30 is located on the central axis. Tangential
A second tilt screw 28b for adjusting the direction tilt angle is located above the center axis.

Next, a method (operation) of adjusting the tilt angle between the optical disk and the optical axis of the pickup by the tilt adjusting device of the optical disk player according to the embodiment of the present invention will be described.

First, as shown in FIGS. 2 and 3, a step portion of the first shaft 18 fixed to the deck base 16 is
Bracket 14 in which spindle motor 12 is fixedly installed
Insert one end face and take the position. At this time, the other end surface of the bracket 14 is located on the lower surface of each second shaft 24 installed on the deck base 16. Thereafter, the bracket 1 fitted to the first shaft 18
4 and a fixing screw 22, a fixing spring 20 is provided, and an adjusting spring 26 is provided between the respective second shaft 24 and the bracket 14. At this time, the bracket 1
4 is tilted by a fixed angle θ (ie, a tilt adjustment amount) by the elastic force of the adjustment spring 26.

Thereafter, the fixing screw 22 is pushed upward by a force P.
The spindle motor 12 is fixed to the deck base 16 by tightening while rotating so that the spindle motor 12 is added. afterwards,
After selecting the point where the first tilt adjusting screw 28a is fastened as a reference point, the first tilt adjusting screw 28a is selected.
a while gradually tightening the radial tilt angle between the optical disk 10 and the optical axis of the pickup 30, and then gradually tightening the second tilt adjusting screw 28 b while tangentially connecting the optical disk 10 and the optical axis of the pickup 30. By adjusting the directional tilt angle, an accurate tilt angle of the optical disc player is set.

[0015]

As described above, the tilt adjusting device for an optical disk player according to the present invention uses a large number of tilt screws and a disc spring that exerts a large force with a small displacement to adjust the tilt angle between the optical disk and the pickup optical axis. By adjusting, the tilt angle of the slim drive for notebook PC, which is allowed only in a narrow space, can be adjusted accurately. By installing the disc spring on the bracket for fixing the spindle motor, high speed When the data stored on the optical disc is reproduced, an error can be obtained by absorbing the vibration generated at the same time, thereby achieving a vibration proof effect. By accurately adjusting the tilt angle between the optical disc and the optical axis of the pickup. It can be reproduced without any problem.

[Brief description of the drawings]

FIG. 1 is a view showing a state in which a tilt angle between a disc and a pickup optical axis according to a preferred embodiment of the present invention is adjusted;
FIG. 3 is a schematic diagram showing a state where a spindle motor is fixedly installed on an optical disk player.

FIG. 2 is a cross-sectional view showing a configuration of an “A” portion in FIG. 1 in detail.

FIG. 3 is a sectional view showing a configuration of a “B” portion in FIG. 1 in detail.

[Explanation of symbols]

 Reference Signs List 10 optical disk 12 spindle motor 14 bracket 16 deck base 18 first shaft 20 fixing spring 22 fixing screw 24 second shaft 26 adjusting spring 28a first tilt adjusting screw (tilt adjusting screw) 28b second tilt adjusting screw (Tilt adjustment screw) 30 Pickup

Claims (5)

[Claims] 1. An optical disc player comprising a spindle motor for rotating an optical disc, a pickup for reading data on the optical disc while moving in a track direction and a focusing direction, and a deck base having a transfer system for transferring the pickup. In the apparatus, a bracket that fixes the spindle motor and serves as a guide during tilt adjustment; a first shaft and a second shaft fixed to the deck base to fix the bracket during tilt adjustment; A fixing spring, which is provided on a lower surface and serves as a vehicle for fixing the spindle motor while maintaining a fixed position; and a fixing screw for fixing the spindle motor by applying a fixed pressure to the fixing spring. And the second shaft and a bra An adjustment spring as a medium for tilt adjustment, and a tilt adjustment screw for adjusting a tilt angle while applying a constant force to the adjustment spring, A tilt adjusting device for an optical disk player, which adjusts a tilt angle between an optical disk and a pickup optical axis. 2. The apparatus according to claim 1, wherein the first shaft and the second shaft are fixedly installed on the deck base by a caulking operation. 3. The tilt adjusting screw comprises a tilt adjusting screw for adjusting a tilt angle in a radial direction between the optical disk and a pickup optical axis, and a tilt adjusting screw for adjusting a tangential tilt angle. The tilt adjusting device for an optical disk player according to claim 1, wherein: 4. The tilt adjustment of an optical disk player according to claim 1, wherein the fixing spring and the adjusting spring use a disc spring to obtain a large force for a small displacement in a small space. apparatus. 5. The tilt adjusting device for an optical disk player according to claim 4, wherein the fixing spring and the adjusting spring are provided so that both side surfaces thereof are in contact with the surface of the bracket.