JP2002190119A - Traverse mechanism of optical disk apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate relative positioning adjustment of a spindle motor and a guide shaft with high-accuracy, in a traverse mechanism of an optical disk apparatus. SOLUTION: In the traverse mechanism of the optical disk apparatus in which a spindle motor 3 having a turntable 33 on which an optical disk is mounted and a guide shaft 41 which moves an optical pickup with a radial direction of the optical disk are disposed on a chassis 2 as a supporting substrate, the guide shaft 41 is fixed to the chassis 2 between conical head-surfaces of a pair of right and left countersunk screws 110 and 120 screwed onto the chassis 2; and the guide shaft 41 is configured so as to be capable of moving with a prescribed direction, by rotating the countersunk screws 110 and 120.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk apparatus capable of reading information from and / or writing information to an optical disk (information recording disk) such as a compact disk. The present invention relates to a technique for adjusting a traverse mechanism for guiding.

[0002]

2. Description of the Related Art An optical disk apparatus has a traverse mechanism for moving an optical pickup along a radial direction of an optical disk. The prior art of an example of the traverse mechanism will be described with reference to the plan view of FIG. 4 and FIG.

[0003] The traverse mechanism 1 has a chassis 2 as a support substrate. In this example, at four corners of the chassis 2, mounting holes 21 used for mounting the chassis 2 in a casing (not shown) of the optical disk device are provided.

The chassis 2 is provided with a base of an optical pickup (not shown), and is provided with a substantially rectangular opening 22 formed in a size that allows the base to move. The spindle motor 3 is attached to one side of the opening 22 (the upper side in FIG. 3).

In this case, a shaft insertion hole 23 is formed at a position where the spindle motor is mounted on the chassis 2. Thus, it is arranged on the back side of the chassis 2 and is fixed to the chassis 2 by, for example, a pair of left and right motor fixing screws 32. Drive shaft 31
, A turntable 33 is attached by press fitting.

[0006] Inside the opening 22, a guide means 4 for guiding the moving direction of the base of the optical pickup is provided. Normally, the guide means 4 includes two guide shafts, a guide main shaft 41 and a guide sub shaft 42, and these two guide shafts are arranged on the back side of the chassis 2 and
After being oriented parallel to a straight line passing through the center of the optical disk 3 (optical disk), both ends thereof are fixed to the chassis 2 by a shaft retainer 5 made of, for example, a molded product.

While one guide main shaft 41 is inserted tightly without play in a guide hole formed in the base of the optical pickup, the other guide sub shaft 42 connects the base of the optical pickup to the turntable 33. It is for holding in parallel with the optical disk support surface, and is inserted into, for example, a lateral U-shaped guide groove formed in the base of the optical pickup.

A motor 6 for moving the optical pickup is mounted on the guide main shaft 41 side of the chassis 2. As shown in FIG. 4, the motor 6 has a drive gear 62 attached to its drive shaft 61. The drive gear 62 is connected to the base of the optical pickup via three intermediate gears 63 to 65 shown by dashed lines in FIG. It is connected to the rack teeth formed on the side.

Therefore, the rotation of the motor 6 causes the optical pickup to move along the guide main shaft 41. At this time, the optical axis of the optical pickup accurately moves on a straight line passing through the center of the turntable 33. It is necessary to adjust the relative position between the spindle motor 3 and the guide means 4 so as to trace.

[0010]

Therefore, conventionally, the shaft insertion hole 23 and the screw insertion hole 3 of the motor fixing screw 32 are conventionally used.
21 is an elongated hole, and the relative position with respect to the guide means 4 is adjusted by moving the spindle motor 3 side within the range of the elongated hole. However, this has the following problems.

That is, since the motor fixing screw 32 is provided inside the outer shape of the turntable 33, when the turntable 33 is pressed into the drive shaft 31 of the spindle motor 3, the motor is turned by a screwdriver (driver). The fixing screw 32 cannot be turned.

For this reason, the mounting position is adjusted in a state in which the turntable 33 is not mounted on the spindle motor 3, but whether or not the adjustment has been correctly performed is determined by mounting the turntable 33 on the spindle motor 3, Since it is necessary to actually turn the optical disc and make a judgment based on the electric signal obtained from the optical pickup,
In some cases, adjustment was not completed at one time.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to make it possible to easily adjust a relative position between a spindle motor and guide means, and to obtain an optical pickup. It is an object of the present invention to provide a traverse mechanism of an optical disk device capable of adjusting the position of an optical disk device while monitoring a received electric signal.

[0014]

In order to achieve the above object, the present invention provides a spindle motor including a turntable on which an optical disk is mounted on a chassis as a supporting substrate, and an optical pickup mounted in a radial direction of the optical disk. A traverse mechanism of an optical disk device provided with a guide shaft for moving the guide shaft along the guide shaft, wherein the guide shaft is fixed to the chassis between the conical surfaces of a pair of left and right countersunk screws screwed into the chassis. And

According to this configuration, one of the countersunk screws is loosened,
By simply tightening the other countersunk screw, the optical axis of the objective lens of the optical pickup can be easily adjusted so as to move on a straight line passing through the center of the turntable.

In this case, it is preferable that the guide shaft is disposed on the back surface of the chassis on the side opposite to the turntable. According to this, the guide shaft is rotated while the optical disk is actually mounted on the turntable. Can be adjusted.

Further, in order to prevent rattling of the guide shaft, it is preferable to provide a spring means for biasing the guide shaft between the pair of left and right countersunk screws toward the chassis.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to the plan view of FIG. 1 and FIG. In this embodiment, the same reference numerals are used for components that may be the same as or may be regarded as the same as the conventional example described above with reference to FIGS. 4 and 5.

In the traverse mechanism 10 according to this embodiment, the chassis 2 as a support substrate, the spindle motor 3 and its turntable 33, the motor 6 for moving the optical pickup, and the gears 62 to 65 related thereto.
May have the same configuration as that of the above-described conventional example, and the description thereof is omitted. Also, the optical pickup is omitted from the drawing, as in the above-described conventional example.

Also in the traverse mechanism 10, the guide main shaft 41 and the guide sub shaft 42 as the optical pickup guide means 4 are arranged on the back side of the chassis 2 in parallel with a straight line passing through the center of the turntable 33 (optical disk). According to the present invention, a pair of left and right countersunk screws 110 and 120 are used as the shaft support means.

In this embodiment, countersunk screws 110, 1
Reference numerals 20 are provided at a total of four places at both ends of the guide main shaft 41 and both ends of the guide sub shaft 42. Guide spindle 41 of them
The configuration on the side is shown in an enlarged manner in FIG.

The countersunk screws 110 and 120 are screwed into the chassis 2 from the back side so as to support the guide spindle 41 between the respective conical surfaces 111 and 121 of the head. The diameter is φ, and countersunk screw 11
Assuming that the distance between the screw shafts 112 and 122 at 0 and 120 is L, L is set to be larger than φ, and the difference (L−
φ) is the adjustment width of the guide spindle 41.

The chassis 2 is provided with, for example, a leaf spring 13 for urging the guide spindle 41 toward the rear surface of the chassis 2.
Zero spring means are provided. In this embodiment, the leaf springs 130 are provided on both end sides of the guide main shaft 41, but may be provided at one central portion of the guide main shaft 41.

The guide sub-shaft 42 may have the same support structure as that of the guide main shaft 41. However, since the guide sub-shaft 42 does not require any particular position adjustment, in this embodiment, the countersunk screws 110, At 120, it is fixed to the chassis 2.

According to the present invention, by loosening one countersunk screw and tightening the other countersunk screw, the guide spindle 41 can be adjusted so as to be parallel to a straight line passing through the center of the turntable 33.

That is, in order to move the guide spindle 41 to the left side in FIG. 3, for example, after loosening the left countersunk screw 110 or tightening the right countersunk screw 120 while loosening, the guide spindle 41 is moved to the right side. It is pushed by the conical surface 121 of the countersunk screw 120 and moves to the left. Conversely, to move the guide spindle 41 to the right,
What is necessary is just to loosen the countersunk screw 120 on the right side and tighten the countersunk screw 110 on the left side.

The adjustment of the guide spindle 41 is performed by the chassis 2
Is performed on the back side. Therefore, the optical pickup can be moved while the optical disk is actually mounted on the turntable 33 and rotated, and the position adjustment of the guide spindle 41 can be accurately performed while observing the electric signal obtained from the optical pickup at that time. Can be performed.

In the above embodiment, the spindle motor 3 may be either fixedly arranged or adjustable in position as in the above-described conventional example. In the above embodiment, both ends of the guide main shaft 41 are supported by the countersunk screws 110 and 120 so as to be position-adjustable. However, in some cases, one end of the guide main shaft 41 on the spindle motor 3 side is, for example, It is rotatable by a vertical rotation shaft, and only the other end of the guide spindle 41 is countersunk screw 110, 1
At 20, the position may be supported so as to be adjustable.

As described above, when the position of only the other end of the guide spindle 41 can be adjusted by the countersunk screws 110 and 120,
The position of the countersunk screws 110 and 120 is the turntable 33.
If the countersunk screws 110 and 120 can be operated from the upper surface side of the chassis 2 outside the optical disk mounted on the chassis 2 without being disturbed by the optical disk, both the guide main shaft 41 and the guide auxiliary shaft 42 are connected to the upper surface side of the chassis 2. Can also be placed.

[0030]

As described above, according to the present invention,
In a traverse mechanism of an optical disk device, a spindle motor including a turntable on which an optical disk is mounted and a guide shaft for moving an optical pickup in a radial direction of the optical disk are provided on a chassis as a support substrate. The relative position between the spindle motor and the guide shaft can be easily adjusted by simply turning the countersunk screw by fixing the pair of left and right countersunk screws screwed into the chassis between the conical surfaces of the heads. Can be.

When the position of the guide shaft is adjusted, the optical pickup can be actually operated. Therefore, the position of the guide shaft can be adjusted with high accuracy while monitoring the electric signal obtained by the optical pickup. Becomes possible.

[Brief description of the drawings]

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

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is an enlarged sectional view of a main part of the embodiment.

FIG. 4 is a plan view similar to FIG. 1 showing a conventional example.

FIG. 5 is a sectional view taken along line BB of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Traverse mechanism 110, 120 Countersunk screw 111, 121 Conical surface of head 112, 122 Screw shaft 130 Leaf spring 2 Chassis 22 Opening 23 Shaft insertion hole 3 Spindle motor 33 Turntable 4 Guide means 41 Guide main shaft 42 Guide sub shaft 6 Light Motor for moving pickup

Claims (3)

[Claims] 1. A traverse of an optical disc apparatus comprising a chassis as a support substrate, a spindle motor including a turntable on which an optical disc is mounted, and a guide shaft for moving an optical pickup in a radial direction of the optical disc. A traverse mechanism for an optical disk device, wherein the guide shaft is fixed to the chassis between the conical surfaces of a pair of left and right countersunk screws screwed into the chassis. 2. The traverse mechanism according to claim 1, wherein the guide shaft is disposed on a rear surface of the chassis on a side opposite to the turntable. 3. The traverse mechanism of an optical disk device according to claim 1, further comprising a spring for urging the guide shaft between the pair of left and right countersunk screws toward the chassis. .