JPH03104035A - Lock mechanism for optical pickup - Google Patents

Abstract

PURPOSE:To make exact the lock mechanism of an optical pickup by providing a means to fix the optical pickup in a state that a power source is turned off, and to release the fixation in a state that the power source is turned on. CONSTITUTION:When the power source is turned OFF, a lock piece 25 is rotated in a counter-clock-wise direction by a plunger spring 29 and engaged with a rack gear 26 and an optical pickup 10 is turned to a lock state. When the power source is turned ON, the spring 29 is compressed by the attracting force of a plunger 28 and the lock piece 25 is rotated in a clock-wise direction by a bias spring 27. Then, the engagement between the lock piece 25 and the gear 26 is released and the lock is released. Thus, an optical pickup sliding part, which is composed of a main guide shaft 12 and an oil ball race 11, and the optical pickup 10 can be protected from vibration or shock at the time of transportation and the release of lock can be prevented from being forgotten when the power source is turned on.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a disc reading device that optically records and reproduces information by projecting a light spot onto a disc-shaped recording medium. This invention relates to a locking mechanism for an optical pickup that locks movement of the optical pickup in the tracking direction.

2. Description of the Related Art In recent years, the uses of disc reading devices such as CD players, radio cassette players, CD-10M, multi-laser players, etc. have become more diverse year by year, and they have also become more sophisticated, high quality, and have high added value. It is important to secure and protect the sliding part of the optical pickup, which is a precision mechanism, and the optical pickup part, which is the essential part that reads the disk signal, from shocks and vibrations during transportation. It is important to maintain the initial performance of the optical pickup.

An example of the locking mechanism of the above-mentioned conventional optical pickup will be described below with reference to the drawings.

FIG. 4 shows a locking mechanism of a conventional optical pickup.

As shown in Figure 4, 1 is a support pace, 2 is an optical deck housing, 3 is a spindle motor, 4 is a tan table,
6 is a centering ring, 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 the main guide shaft, 13 is the auxiliary guide shaft, 14 is the guide roller, 16 is the guide roller mounting shaft, 16 is the guide roller retaining ring, 17 is the disk, 18 is the yoke, 19 is the coil, 20 is the presser plate ▲, 21 is the holding plate ▲ installation screw, 22 is the holding plate B, 23 is the holding plate B installation screw, 26
is a lock unit.

The operation of the locking mechanism of the optical pickup for a disc reading device constructed as described above will be explained below.

A main guide shaft 12 and an auxiliary guide shaft 13 are attached to the casing and optical deck housing 2 with high precision, and an oil-less metal 11 press-fitted into the main guide portion of the optical pickup 10 and an oil-less metal 11 attached to the optical pickup 10 The guide roller attachment shaft 16 and the guide roller 14 allow the optical pickup 1o to move in the tracking direction of the disk. 1 yoke 18 buttons and optical pickup 1 attached to optical deck housing 2
The optical pickup 1 is connected to the optical pickup 1 by the coil 19 attached to the
0 is driven in the tracking direction of the disk. Spindle motor 3 attached to optical deck housing 2
A turntable 4 is accurately mounted at a specified height. A centering ring 6 is attached to the turntable 4, a disc 17 is mounted by a button clamper 6, and the disc is in a state of being read. An optical deck housing 2 is attached to the support space 1 by a floating rubber 7, floating springs 8, 7 and a loading screw 9, and the optical deck housing 2 is in a floating state.

The optical pickup 10 is moved in the tracking direction of the disk by the drive device, and at the same time, the floating mechanism attenuates or blocks external vibrations such as vibrations from the floor, vibrations of the exterior case, support space, and resonance, and The vibration of the reading device and disk is reduced.

Furthermore, in order to protect the optical pickup 1o from vibrations and shocks during transportation, insert your hand into the bottom of the main body and push up the lower end of the lock unit 26 attached to the optical deck housing 2 of the optical pickup 1o. The lock unit 26 is fixed by pushing the upper end of the lock unit 26 into the round hole at the bottom of the optical pickup 10 until it fits. When decoding a disc, insert your hand into the bottom of the main body and pull the lower end of the lock unit 26 attached to the optical deck housing 2 downward, so that the upper end of the lock unit 26 is attached to the bottom of the optical pickup 10. By pulling out the optical pickup 10 from the round hole in the disk, the optical pickup 10 can be moved in the tracking direction of the disk.

Problems to be Solved by the Invention However, in the configuration described above, if the locking operation is not forgotten, a shock may be applied to the optical pickup 10, the oil-less metal 11 head, and the main guide shaft 12 during transportation. , main guide shaft 12 and oil-less metal 1
1, the performance of the sliding part of the optical pickup deteriorates, the problem of forgetting to release the lock during disk playback makes playback impossible, and the lock unit 26 becomes heavier due to higher performance products. There were problems such as difficulty in turning on and off the switch.

In view of the above problems, the present invention provides a locking means for fixing an optical pickup when the power is turned off, and a state in which the optical pickup can be moved in the tracking direction of the disk when the power is turned on. The optical pickup is always automatically locked even when the power is not turned on, and the optical pickup is automatically unlocked when the power is turned on, thereby providing an accurate optical pickup locking mechanism. be.

Means for Solving the Problems In order to solve the above problems, the present invention provides an optical pickup, a guide shaft for guiding the optical pickup in the tracking direction of the disk, and a linear feeding mechanism for moving the optical pickup in the tracking direction of the disk. and a locking means that fixes the optical pickup when the power is turned off, and when the power is turned on, the fixing of the optical pickup by the locking means is released to make the optical pickup movable in the tracking direction of the disk. According to the above-described structure, the present invention automatically locks the optical pickup using the locking means not only during transportation but also when it is set up. Protects the optical pickup sliding parts and optical pickup from vibration and shock during transportation. Furthermore, when the power is turned on, the unlocking means is used to automatically release the lock, thereby preventing forgetting to release the lock. The above automatic locking mechanism button and automatic lock release means prevent performance deterioration of the optical pickup sliding part button and the optical pickup due to forgetting to lock the optical pickup during transportation. Additionally, since there is no need to move the product during locking, the product's quality stability and ease of handling have been greatly improved.

Embodiment Below, an optical pickup automatic locking mechanism according to a first embodiment of the present invention will be explained with reference to the drawings.

FIG. 1 is an exploded perspective view of an optical pickup automatic locking mechanism showing a first embodiment of the present invention. FIG. 2 is a partial detailed view of the optical pickup automatic locking mechanism according to the first embodiment of the present invention when the power is turned off.

FIG. 3 shows a partial detailed view of the optical pickup automatic locking mechanism according to the first embodiment of the present invention when the power is turned on.

As shown in Figures 1, 2 and 3, 1 is a support base;
2 is an optical deck housing, 3 is a spindle motor, 4 is
is a turntable, 6 is a centering ring, 6 is a clamper,
7 is floating rubber, 8 is floating spring, 9
is a floating screw, 10 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, 16 is a guide row 2 mounting shaft, 16 is a guide roller retaining ring, 17 is a disc It is. 18 and 19 are yokes that drive the optical pickup 1o in the tracking direction of the disk; coil 2o is a main guide shaft 12 button; and holder plate ▲ for attaching yoke 18 to optical deck housing 2; 21 is a holder plate ▲ 20.
Holding plate for attaching to optical deck housing 2 ▲
22 is a holding plate B123 for fixing the auxiliary guide shaft 13; 24 is a rack gear; 26 is a lock piece; 26 is a lock base; 27
is the bias spring, 28 is the plunger, 29 is the plunger spring, 3o is the plunger spring retaining ring, 31 is the rack gear set screw, 32 is the lock pace set screw, 33 is the plunger mounting plate, and 34 is the plunger mounting screw. be.

The operation of the optical pickup automatic locking mechanism of the disc reading device configured as described above will be explained below with reference to FIGS. 1, 2, and 3.

First, a turntable 4 is attached to a spindle motor 3 attached to an optical deck housing 2 at a predetermined height with high precision. A centering ring 6 is attached to the table 3, and a disk 17 is attached by a clamper 6, so that the disk is in a read state.

A main guide shaft 12 and an auxiliary guide shaft 13 are attached to the optical deck housing 2 with high precision, and an oil-less metal 11 press-fitted into the main guide portion of the optical pickup 1o and an oil-less metal 11 that is attached to the optical pickup 1o are attached to the optical deck housing 2 with high precision. The optical pickup 1o is in a state of movement in the tracking direction of the disk 17 due to the guide roller 14 that is tightly attached to the guide roller attachment shaft 15. The gap between the outer diameter of the main guide shaft 12 and the inner diameter of the oil lame metal 11 is set to the minimum necessary.

The optical pickup 10 is driven in the tracking direction of the disk 17 by a yoke 18 button attached to the optical deck housing 2 and a coil 19 attached to the optical pickup 10.

Further, the optical deck housing 2 is attached to the support base 1 by a floating rubber 7, floating springs 8, 7 and a loading screw 9, and the optical deck housing 2 is in a floating state.

Furthermore, as shown in FIG. 2, when the power is turned off, the locking piece 26 is rotated counterclockwise by the plunger spring 29 and is engaged with the rack gear 26, so that the optical pickup 6 is in a locked state.

When the power is turned on, plunger 28 is activated as shown in Figure 3.
The plunger spring 29 is compressed by the suction force, the lock piece 26 is rotated clockwise by the bias spring 27, the lock piece 26 and the rack gear 26 are disengaged, and the optical pickup 1o is unlocked.

As described above, according to this embodiment, the optical pickup is automatically locked by engaging the lock piece with the rack gear attached to the optical pickup using a plunger during transportation or when the power is not turned on. This protects the optical pickup sliding part button, which is composed of the main guide shaft 12 and the oilless metal 11, and the optical pickup 10 from vibrations and shocks during transportation. When the power is turned on after the power is turned on, a plunger is used to automatically release the locking mechanism that is controlled by the rack gear and lock piece attached to the optical pickup, thereby preventing forgetting to release the lock.

The automatic locking mechanism described above prevents the performance of the optical pickup sliding portion and the optical pickup from deteriorating due to forgetting to operate the lock. When locking or unlocking the optical pickup during transportation or playing, there is no need to lift the product and insert your hand from the bottom of the product each time to perform the locking or unlocking operation. Effects of the Invention that Can Significantly Improve Handling Efficiency As described above, according to the present invention, an optical pickup, a locking means for fixing the optical pickup when the power is turned off, and a locking means for fixing the optical pickup when the power is turned on are provided. Equipped with a lock release means that allows the pickup to move in the tracking direction of the disk, the optical pickup is automatically locked not only during transportation but also at all times unless the power is turned on, making it a precision mechanical part. It protects the optical pickup sliding part and the optical pickup from external impact, and at the same time provides easy handling of the product.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of an optical pick automatic locking mechanism of a disc reading device according to an embodiment of the present invention, and Fig. 2 (auto)), (kl), and (c) show an embodiment of the present invention. Top view, front view, and side view of the optical pickup automatic locking mechanism when the power is turned off, Figure 3 (2L), (b),
(0) shows a plan view, front view, and side view of an optical pickup automatic locking mechanism according to an embodiment of the present invention when the power is turned on; 1st... support base; 2... optical Deck no. 1 Uzing, 3...Spindle motor, 4.
... Turntable, 6 ... Centering ring, 6 ... Clamper, 7 ... Floating rubber, 8 ... Floating spring, 9.
...Floating screw, 10...Optical pickup, 11...Oil-less meckle, 12
...Main guide shaft, 13...Auxiliary guide shaft, 14...Guide roller, 16...
Guide roller mounting shaft, 16... Guide roller retaining ring, 17... Disc, 18...
・Yoke, 19... Coil, 20...
Pressing plate ▲, 21... Pressing plate ▲ installation screw, 2
2...Press plate B123...Press plate B mounting screw, 24...Rack gear, 26...
... Lock piece% 28 ... Lock heath, 27
...Bias spring, 28...Plunger, 29...Plunger spring, 30...
...Plunger panel retaining ring, 31...Rack gear set screw, 32...Lock pace set screw, 33...Plunger mounting plate, 34...
... Plunger mounting screw.

Claims (1)

[Claims] an optical pickup, a guide shaft for guiding the optical pickup in the tracking direction of the disk, a linear feeding mechanism for moving the optical pickup in the tracking direction of the disk, and a locking means for fixing the optical pickup when the power is turned off. 1. A locking mechanism for an optical pickup, comprising: a lock release means that releases the fixation of the locking means when the power is turned on, and makes the optical pickup movable in the tracking direction of the disk.