JPH11126460A - Mechanism for attaching and adjusting spindle motor in optical disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a high precision assembly by installing an eccentric ring jig between a spigot hole of a frame and a cylindrical spigot in the lower part of a spindle motor and fixing the motor to the frame. SOLUTION: An eccentric ring 3 is designed to fit to a spigot hole 2 of a frame 1 on which a spindle motor 4 or the like is loaded; the hole, which fits to the cylindrical spigot 5 of the spindle motor in the lower part of the spindle motor 4, is provided eccentrically from the center of the eccentric ring 3. In addition, the eccentric ring 3 is equipped with an adjusting pin 6 capable of rotating the ring. At the time of attaching and adjusting the spindle motor 4 to the frame 1, the eccentric ring 3 is held at the height free from coming off the superposition of the thickness of the spigot hole 2 of the frame on the thickness of the spindle motor spigot 5, and is rotatably adjusted by the adjusting pin 6. Thus, without any interposition other than the eccentric ring 3 between the spindle motor 4 and the frame 1, the relative position is easily adjusted of the spindle motor 4 against the frame 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for attaching a spindle motor of an optical disk drive to a frame, and more particularly to an adjusting mechanism for attaching a spindle motor using a jig.

[0002]

2. Description of the Related Art As shown in FIG. 2, a spindle motor mounting and adjusting mechanism of a conventional optical disk apparatus includes a frame positioning jig 7 for positioning a frame 1 and a spindle motor positioning jig 8 for positioning a spindle motor 4. The spindle motor positioning jig 8 is provided with a linear slider 9 so that the relative position of the spindle motor positioning jig 8 with respect to the frame positioning jig 7 can be adjusted. A frame 1 on which a spindle motor 4, an optical head (not shown), and a head feed mechanism (not shown) are mounted has a plurality of guide holes 12 and 13 formed in the frame 1 and a frame positioning jig corresponding thereto. The spindle motor 4 is fixed to the frame positioning jig 7 by guide pins 10 and 11 disposed on the substrate 7, while the spindle motor 4 is provided with a plurality of guide holes 16 and 17 provided in the substrate 18 and a corresponding spindle motor positioning jig. It is fixed to the spindle motor positioning jig 8 by guide pins 14 and 15 arranged on the jig 8.

Accordingly, the spindle motor 4 includes a spindle motor positioning jig 8 and a frame positioning jig 7.
The adjustment of the relative position of the spindle motor 4 to the frame 1 is possible after the adjustment is completed.

[0004]

However, in the conventional spindle motor mounting and adjusting mechanism as described above,
The frame is fixed to the frame positioning jig by a plurality of guide holes provided in the frame and corresponding guide pins arranged on the frame positioning jig, while the spindle motor is provided with a plurality of guide holes provided on the substrate. The guide holes and the corresponding guide pins arranged on the spindle motor positioning jig are fixed to the spindle motor positioning jig.In this state, the relative position between the spindle motor and the frame can be adjusted. Due to the gap generated between each guide hole of the motor and the guide pin corresponding to each guide hole, and the effect of insufficient rigidity in a state where the frame positioning jig and the spindle motor positioning jig are combined, The amount of operation during adjustment and the amount of change in the actual relative position between the spindle motor and the frame become non-linear. There is a problem that 0μm following fine adjustment is difficult, in the recent rapid increase in capacity proceeds, the accuracy required of the device, are no longer completely particularly for high-precision adjustment of decentering direction.

SUMMARY OF THE INVENTION An object of the present invention is to solve such a conventional problem. The object of the present invention is not to rely on the improvement of the precision of parts, and to eliminate the need for a high-precision and high-rigidity jig. An object of the present invention is to provide a spindle motor mounting and adjusting mechanism of an optical disk device that can be assembled with high accuracy so that a relative position is optimized.

[0006]

According to the present invention, there is provided a spindle motor mounting / adjusting mechanism for an optical disk apparatus, comprising: a spindle motor for rotating a recording medium; and an optical head for recording / reproducing information on / from the recording medium. A head feed mechanism that performs the positioning operation of the optical head, a frame that fixes and arranges the spindle motor, the optical head, and the head feed mechanism at predetermined positions; and When attaching and fixing to the frame,
An eccentric ring jig is mounted between a spigot hole provided in the frame and a cylindrical spigot below the spindle motor, and the spindle motor is mounted and fixed to the frame.

The eccentric ring jig is fitted into both the spigot hole provided in the frame and the cylindrical spigot below the spindle motor, and the eccentric ring jig is provided on the eccentric ring. The spindle motor is attached to the frame and adjusted by rotating the spindle with the adjustment pin.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a spindle motor attachment adjusting mechanism of an optical disk device according to the present invention will be described with reference to the drawings.

FIG. 1 is a schematic perspective view showing an embodiment of a spindle motor mounting and adjusting mechanism of an optical disk apparatus according to the present invention.

Referring to FIG. 1, the outer shape of an eccentric ring 3 is formed by a frame motor provided on a frame 1 on which a spindle motor 4, an optical head (not shown), and a head feed mechanism (not shown) are mounted. The hole which is formed to fit into the hole 2 and fits with the cylindrical spindle motor spigot 5 below the spindle motor 4 is provided eccentrically with respect to the center of the outer diameter of the eccentric ring 3. Further, the eccentric ring 3 is provided with an adjusting pin 6 for rotating the eccentric ring 3.

Therefore, the spindle motor 4 is connected to the frame 1
When the mounting pin is adjusted, the adjusting pin 6 is rotated while the eccentric ring 3 is kept at a height that does not deviate from the overlap between the plate thickness of the frame spigot hole 2 and the plate thickness of the spindle motor spigot 5. The relative position of the spindle motor 4 to the frame 1 can be adjusted easily and with high accuracy without any intervening parts other than the eccentric ring 3 between the spindle motor 4 and the frame 1.

[0012]

As described above, according to the present invention, the relative position of the spindle motor with respect to the frame can be adjusted without any intervening member other than the eccentric ring between the spindle motor and the frame. Minimize the non-linearity of the amount of operation at the time of adjustment due to the gap caused by attaching the frame to each jig and the lack of rigidity of the jig itself, and the amount of change in the relative position between the actual spindle motor and the frame, There is an effect that a very easy and highly accurate spindle motor mounting adjustment mechanism of the optical disk device can be realized.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing one embodiment of a spindle motor attachment adjusting mechanism of an optical disk device of the present invention.

FIG. 2 is a schematic perspective view showing a spindle motor attachment adjustment mechanism of a conventional optical disc device.

[Explanation of symbols]

 Reference Signs List 1 frame 2 frame spigot hole 3 eccentric ring 4 spindle motor 5 spindle motor spigot 6 adjustment pin 7 frame positioning jig 8 spindle motor positioning jig 9 linear slider 10, 11 guide pin 12, 13 guide hole 14, 15 guide Pin 16, 17 Guide hole 18 Board

Claims (4)

[Claims] A spindle motor for rotating a recording medium, an optical head for recording / reproducing information on / from the recording medium, a head feeding mechanism for performing a positioning operation of the optical head, The spindle motor, the optical head,
A frame for arranging and fixing the head feed mechanism at a predetermined position, and when attaching and fixing the spindle motor to the frame, a spigot hole provided in the frame and a cylinder below the spindle motor. An eccentric ring jig is mounted between the spigot and a spigot, and the spindle motor is mounted and fixed to the frame. 2. The optical disc apparatus according to claim 1, wherein the eccentric ring jig is fitted into both a spigot hole provided in the frame and a cylindrical spigot below the spindle motor. Spindle motor mounting adjustment mechanism. 3. The spindle motor mounting and adjusting mechanism according to claim 1, wherein the spindle motor is mounted and adjusted on the frame by rotating the eccentric ring jig. 4. The spindle motor mounting adjustment mechanism according to claim 1, wherein an adjustment pin for rotating the eccentric ring jig is provided on the eccentric ring jig.