JPH04102276A - Optical pickup traverse feeding device - Google Patents

Abstract

PURPOSE:To protect an optical pickup sliding part and an optical pickup from vibration and shock and to prevent the performance of the optical pickup lowered by engaging the second fitting part of a feed nut with a traverse feed screw when the fitting part of the feed nut with the feed screw is floated due to the shock, etc. CONSTITUTION:The optical pickup 2 is moved on a disk at regulated speed by fitting the feed nut 4 in the traverse feed screw 3. An optical deck housing 1 is set in a floating state by floating rubber 22. In such a case, when the fitting of the first fitting part of the nut 4 with the screw 3 is floated due to the shock, etc., the second fitting part of the nut 4 is engaged with the screw 3, thereby, an optical pickup traverse feed device with low load and high quality can be realized.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a disc reproducing apparatus that optically reproduces information by projecting a light spot onto a disc-shaped recording medium, in which an optical pickup is directed toward the disc tracking direction. This relates to a mechanism that locks the movement of.

Conventional technology In recent years, the uses of disc playback devices such as CD players, radio-cassette players, CD-ROMs, and multi-laser players have become more diverse year by year, and they have become more sophisticated, high-quality, and high-value-added. 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 heart of reading disc signals, from external shocks or shocks and vibrations during transportation.
This is important for maintaining the initial performance of the optical pickup sliding parts and the optical pickup.

Hereinafter, an example of the optical pickup transport locking mechanism of the conventional optical pickup traverse feeder described above will be described with reference to the drawings.

Figure 4 fa1. (bl is a plan view and a bottom view showing a conventional traverse feed device for an optical pickup. FIGS. 5A and 5B are exploded perspective views showing a spindle portion and a feed nut portion of the same mechanism.

In Figures 4 and 5, 1 is an optical deck housing, 2 is an optical pickup, 3 is a traverse feed screw, 4 is a feed nut, 5 is a feed nand mounting screw, 6 is a traverse motor, 7 is a motor frame, and 8 is a 1 is a motor gear, 9 is an intermediate gear, 10 is a drive gear, 11 is a motor frame mounting screw, 12 is an intermediate gear shaft, 13 is a bearing, 14 is a guide shaft, 15 is a turntable, 16 is a spindle motor, 1
7 is a motor mounting plate, 18 is a motor mounting screw, 19 is a motor block mounting screw, 20 is an inner limit switch, 2
1 is a limit switch mounting screw, and 22 is a floating rubber. Regarding the optical pickup traverse feeder of the disc reading device configured as above,
The operation will be explained below.

First, the optical deck housing 1 has a guide shaft 14 that guides the optical pickup 2 in the tracking direction of the disk.
Also, an inner circumference limit switch 20 for detecting the inner circumference position of the optical pickup 2 is mounted with high accuracy.

A traverse feed screw 3 is attached to the optical pickup 2, and a bearing 13 and a guide shaft 14 allow the optical pickup 2 to move in the tracking direction of the disk. A traverse motor 6 and an intermediate gear shaft 12 are attached to the motor frame 7, and are attached to the optical deck housing 2 with remoter frame attachment screws 11. Also, a motor gear 8 attached to the traverse motor 6. Intermediate gear 9 attached to intermediate gear shaft 12
and drive gear 1 attached to traverse feed screw 3
0, the rotation of the traverse roller is transmitted to the traverse feed screw 3.

A feed nut 4 is attached to the optical pickup by a feed nut mounting screw 5, and by fitting the feed nut 4 to the traverse feed screw 3, the optical pickup 2 can be moved in the tracking direction of the disk at a specified speed. can.

A spindle motor 16 is attached to the motor mounting plate 17, and a turntable assembly 15 is attached to the spindle motor 17 at a specified height, and is in a disk reading state. A floating rubber 22 is attached to the optical deck housing 1, and the optical deck housing 1 is in a floating state.

The optical pickup 2 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/resonance of the outer case/support base, etc. Reduces vibrations in the reading device, optical pickup, and disc.

Furthermore, in order to protect the optical pickup 2 from vibrations and shocks during transportation, the optical pickup 2 is fixed by a traverse feed screw 3 and a feed nut 4.

Problems to be Solved by the Invention However, with the above configuration, when an impact is applied to the optical pickup 2 in the tracking direction of the disk during transportation, etc., the fitting part of the feed nut 4 lifts up, causing the optical pickup 2 to fall and damage the optical housing. 1, the initial characteristics of the optical pickup 2 cannot be maintained or the performance of the sliding portion of the optical pickup 2 deteriorates.

Furthermore, if the pushing force of the feed nut 4 is increased in order to increase the fitting force between the feed nut 4 and the traverse feed screw 3, the load on the traverse motor 6 will increase, and there is a problem that the pushing force cannot be increased beyond a certain level. It had

The present invention addresses the above-mentioned problems and provides a low-load, high-quality optical pickup traverse feeder by having a structure in which the feed nut does not lift up even if an impact is applied to the fitting portion between the feed nut and the traverse feed screw. It is something to do.

Means for Solving the Problems In order to solve the above problems, the present invention includes an optical pickup, a traverse motor, a guide shaft that guides the optical pickup in the tracking direction of the disk, and a rotation of the traverse motor to achieve a specified rotation. A traverse feed screw, which rotates by the number of seconds, is attached to the optical pickup and is fitted with the traverse feed screw to move the optical pickup in the tracking direction of the disk, and even if an impact is applied to the optical pickup, the optical pickup amplifier can be moved. It is equipped with a feed nut that also serves as a transportation lock function for holding.

Also, an optical pickup, a traverse motor, a motor frame for fixing the traverse motor, a guide shaft for guiding the optical pickup in the tracking direction of the disk, and a traverse feed screw that rotates at a specified number of rotations by rotation of the traverse motor. a feed nut that is attached to the optical pickup and moves the optical pickup in the tracking direction of the disk by fitting with the traverse feed screw; and a feed nut that holds the traverse motor and prevents the feed nut from lifting during transportation, etc. The present invention includes a feeding nut holding member that holds the optical pickup even if an impact is applied to the optical pickup and has a transportation lock function.

Effects The present invention has the above-described structure so that when the fitting part of the feed nut and the traverse feed screw is lifted up due to an impact or the like, the other fitting part of the feed nut engages with the feed screw. By creating a structure in which the feed nut does not lift up depending on the parts, it is possible to construct a low-load, high-quality optical pickup traverse feed device, which protects the optical pickup sliding part from vibrations and shocks not only during transportation but also during performance. It protects the optical pickup, prevents the sliding parts of the optical pickup and the performance of the optical pickup from deteriorating, and greatly improves the quality stability of the product.

Embodiment Hereinafter, an optical pickup traverse feeder according to a first embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows an exploded perspective view of a traverse feeding device showing a first embodiment of the present invention.

Figure 2 (b), fc), and cd) are a plan view, an A-A cross-sectional view, and a side view showing essential parts of an optical pickup traverse feeder according to a first embodiment of the present invention. be.

In Figures 1 and 2, 1 is an optical deck song;
2 is an optical pickup, 3 is a traverse feed screw, 4 is a feed nut, 5 is a feed nut installation screw, 6 is a traverse motor, 7 is a motor frame, 8 is a motor gear, 9 is an intermediate gear, 10 is a drive gear, 11 is a motor Frame mounting screw, 12 is intermediate gear shaft, 13 is bearing, 14 is guide shaft,
15 is a turntable, 16 is a spindle motor, 17
is the motor mounting plate, 18 is the motor mounting screw, 19 is the motor block mounting screw, 20 is the inner limit switch, 21
2 is a limit switch mounting screw, and 22 is a floating rubber.

The operation of the optical pickup traverse feeding device of the disc reading device configured as described above will be explained below.

First, the optical deck housing 1 has a guide shaft 14 that guides the optical pickup 2 in the tracking direction of the disk.
Also, an inner circumference limit switch 20 for detecting the inner circumference position of the optical pickup 2 is mounted with high accuracy.

A traverse feed screw 3 is attached to the optical pickup 2, and a bearing 13 and a guide shaft 14 allow the optical pickup 2 to move in the tracking direction of the disk. A traverse motor 6 and an intermediate gear shaft 12 are attached to the motor frame 7, and are attached to the optical deck housing 2 with motor frame attachment screws 11. Also, the motor gear 8 attached to the traverse smoker. Intermediate gear 9 attached to intermediate gear shaft 12
and drive gear 1 attached to traverse feed screw 3
0, 60 rotations of the traverse motor are transmitted to the traverse feed screw 3.

A feed nut 4 is attached to the optical pickup 2 by a feed nut mounting screw 5, and by fitting the feed nut 4 to the traverse feed screw 3, the optical pickup 2 is installed.
can be moved at a prescribed speed in the tracking direction of the disk.

A spindle motor 16 is attached to the motor mounting plate 17, and a turntable assembly 15 is attached to the spindle motor 17 at a specified height, on which a disk is mounted. A floating rubber 22 is attached to the optical deck housing 2, and the optical deck housing 2
is in a floating state.

Due to the configuration of the drive device described above, the optical pickup 10 is in a state of movement in the tracking direction of the disk, and at the same time, the floating mechanism damps or blocks external vibrations such as vibrations from the floor, vibrations and resonances of the exterior case and support base. This reduces the vibration of the optical pickup disk.

Furthermore, in order to protect the optical pickup 10 from vibrations and shocks during transportation, the optical pickup 2 is mounted between the traverse feed screw 3, the first fitting part 4a and the second fitting part 4a, as shown in FIG. 2 (C1, fd). It is fixed by a feed nut 4 having a fitting part 4b.

That is, according to this embodiment, when the fitting between the first fitting part 4a of the feed nut 4 and the traverse feed screw 3 comes loose due to an impact or the like, the other second fitting part 4a of the feed nut 4
By configuring the fitting portion 4b to mesh with the traverse feed screw 3, it is possible to provide a low-load, high-quality optical pickup traverse feed device.

FIG. 3 (al, fbl, fcl, fdl are a plan view, an AA sectional view, and a side view showing the main parts of an optical pickup traverse feeder according to a second embodiment of the present invention.

The difference from the first embodiment is that when an impact is applied to the optical pickup 2, the fitting part of the feed nut 4 is not lifted up by applying the feed nut 4 to the motor frame 7. It is possible to provide a high-quality optical pickup traverse feeding mechanism. In the second embodiment, the lifting of the feed nut 4 was prevented by the motor frame 7, but the optical deck housing l
It may also be done by

Effects of the Invention As described above, the present invention has a structure in which when the fitting portion between the feed nut and the traverse feed screw is lifted due to an impact or the like, the other second fitting portion of the feed nut engages with the feed screw. or by another part to feed the nut 4.
By having a structure that does not lift up, it is possible to construct a low-load, high-quality optical pickup traverse feeder, which protects the optical pickup sliding part and optical pickup from vibrations and shocks not only during transportation but also during performance. Therefore, it is possible to prevent the sliding part of the optical pickup and the performance of the optical pickup from deteriorating, and to greatly improve the quality stability of the product.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of an optical pickup traverse feeding device of a disc reading device according to a first embodiment of the present invention, and FIG. A plan view, an A-A sectional view and a side view showing the main parts of the optical pickup traverse feeder,
3(a), (b), (C1, fdl is a plan view, AA sectional view and side view showing the main parts of an optical pickup traverse feeder according to a second embodiment of the present invention;
Figures (al, fbl) are a top view and bottom view of an optical pickup traverse feeder of a conventional disc reader, and Figures (al, +b) are a spindle motor section and feeder of an optical pickup traverse feeder of a conventional disc reader. It is an exploded perspective view of the NAND part. 2... Optical pickup, 3... Traverse feed screw, 4... Feed nut, 5...
...Feed nut mounting screw, 6...Traverse motor, 7...Motor frame, 11...
・Motor frame mounting screw. Name of agent: Patent attorney Yoshiaki Koba and two others Figure J-) Rubber Smoke 7-Motor Frame Cb) Figure (4-pin (Rinat 1P

Claims (2)

[Claims] (1) An optical pickup, a traverse motor, a guide shaft that guides the optical pickup in the tracking direction of the disk, a traverse feed screw that rotates at a specified number of rotations due to the rotation of the traverse motor, and a traverse feed screw that is attached to the optical pickup. A feed nut having a transportation locking function that moves the optical pickup in the tracking direction of the disk by fitting with the traverse feed screw and holds the optical pickup even if an impact is applied to the optical pickup. An optical pickup traverse feeder featuring: (2) an optical pickup, a traverse motor, a motor frame that fixes the traverse motor, a guide shaft that guides the optical pickup in the disk tracking direction, and a traverse that rotates at a specified number of rotations by the rotation of the traverse motor. a feed screw; a feed nut that is attached to the optical pickup and moves the optical pickup in the tracking direction of the disk by fitting with the traverse feed screw; and a feed nut that holds the traverse motor and prevents the feed nut from lifting up. An optical pickup traverse feeder comprising: a feed nut holding member having a transportation locking function to hold the optical pickup even if an impact is applied to the optical pickup.