JP3075881B2 - Guide shaft fixing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guide shaft fixing device for guiding the movement of a pickup for reading a signal recorded on a disk.

[0002]

2. Description of the Related Art An optical disk player which optically reads a signal recorded on a disk using an optical pickup has become widespread, and such an optical pickup uses an electric motor in a radial direction of the disk. It is configured to be moved by a driving force. Since such an optical pickup needs to accurately read out a signal recorded on the disk, it is necessary to accurately move the disk in the radial direction, and in general, a guide fixed to a fixed substrate is required. The moving operation is guided by the shaft. An example of such a guide shaft fixing device is described in Japanese Utility Model Laid-Open No. 5-4368.

[0003]

A guide shaft for guiding the optical pickup and an electric motor for rotating the disk are mounted and fixed on the same fixed substrate. Since the in-vehicle disc player is susceptible to external vibration, the fixed substrate is supported by a vibration-proof member such as rubber so that vibration from the cabinet is not transmitted.

Although such a configuration has prevented the adverse effects of external vibrations, the following problems have recently arisen with the reduction in weight of optical pickups. That is, the vibration generated from the optical pickup main body is transmitted to the fixed substrate via the guide shaft, and the vibration is further transmitted to the disk via the electric motor that drives the disk to rotate. Then, a phenomenon called resonance occurs.

An object of the present invention is to provide a guide shaft fixing device which solves such a problem.

[0006]

According to the present invention, there is provided a guide shaft fixing device for reading a signal recorded on a disk and a fixed substrate on which a motor for rotating a turntable on which the disk is mounted is fixed. A guide shaft that supports the pickup so that the pickup can be moved in the radial direction of the disk, and a shaft hole into which the tip of the guide shaft is inserted are formed, and the pickup shaft is inserted into a support hole formed in the fixed substrate. It is composed of an elastic support member.

[0007]

According to the present invention, the distal end of the guide shaft is inserted into a support hole formed in the fixed substrate by inserting an elastic support member having a shaft hole into which the distal end of the guide shaft is inserted. It is intended to be fixed to.

[0008]

FIG. 1 is a sectional view of a main part showing a fixing device of the present invention, and FIG. 2 is a front view showing a main part of a disc player according to the present invention.

In FIG. 2, reference numeral 1 denotes a turntable on which the disk 2 is mounted, and 3 denotes an electric motor for rotating the turntable 1 and is fixedly mounted on a fixed substrate 4.
Reference numeral 5 denotes a pickup for optically reading a signal recorded on the disk, and is fixed to a support 6.

The support 6 is supported by a guide shaft 7 so as to allow the disk 2 to move in the radial direction, and is mounted so as to be moved by a feed motor (not shown).

The disk player according to the present invention is constructed as described above. Next, a fixing device for the guide shaft 7 will be described with reference to the sectional view shown in FIG.
In the embodiment shown in FIG. 1, the guide shaft 7 includes a large-diameter portion 7a for guiding the support 6 of the pickup 5 and a small-diameter portion 7b formed at the tip thereof. 8
Is a resilient support member made of an elastic material such as rubber. A shaft hole 8a into which the small-diameter portion 7b of the guide shaft 7 is inserted is formed at the center, and the outer diameter thereof is a large-diameter portion of the guide shaft 7. 7a is slightly larger than the diameter of 7a.

Reference numeral 9 denotes a support hole formed in the side wall portion 10a of the support portion 10 of the fixed substrate 4, the diameter of which is slightly larger than the diameter of the large diameter portion 7a of the guide shaft 7. And the elastic supporting member 8 is inserted.

FIG. 1 shows a state in which a small diameter portion 7b provided at the distal end of a guide shaft 7 is inserted into a shaft hole 8a formed in an elastic support member 8, and then formed in a support portion 10 of a fixed substrate 4. 2 shows a state in which the guide shaft 7 is inserted together with the elastic support member 8 into the support hole 9. The guide shaft 7 is fixed to the fixed substrate 4 in this manner. As shown, a part of the large-diameter portion 7a constituting the guide shaft 7 is inserted into the support hole 9 slightly. Is configured.

[0014]

[0015]

According to the fixing device of the present invention, the elastic support member having the shaft hole into which the tip of the guide shaft for guiding the pickup is inserted is inserted into the support hole formed in the fixed substrate. Since the tip of the guide shaft is fixed to the fixed substrate, the vibration generated by the pickup main body is not transmitted to the fixed substrate via the guide shaft, and the resonance generated between the pickup and the disk Can be prevented.

Further, since the guide shaft is supported in a state where the elastic support member for supporting the guide shaft is inserted into the support hole, the guide shaft is deformed even if the elastic support member is deformed due to a rise in ambient temperature. Can be suppressed.

According to the present invention, a support hole slightly larger than the large diameter portion of the guide shaft is provided in the fixed substrate, and the elastic support member is inserted into the support hole to fix the guide shaft to the fixed substrate. And a part of the large-diameter portion formed on the guide shaft is inserted into the support hole. Therefore, even if the elastic support member inserted into the support hole is abnormally deformed, the large-diameter portion is deformed. Since the diameter portion is in contact with the support hole, a large displacement of the guide shaft can be prevented, and as a result, the present invention has an effect that the positional deviation of the guide shaft can be suppressed within an allowable range.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part showing a fixing device of the present invention.

FIG. 2 is a front view showing a main part of the disc player according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Turntable 3 Motor 4 Fixed board 5 Pickup 7 Guide shaft 7a Large diameter part 7b Small diameter part 8 Elastic support member 8a Shaft hole 9 Support hole

Claims (1)

(57) [Claims] 1. A fixed substrate on which a motor for rotating and driving a turntable on which a disk is mounted is fixed, and a pickup for reading a signal recorded on the disk can be moved in a radial direction of the disk. Tomo and support
Large-diameter part to guide pickup to the head and small-diameter part at the tip
Is formed in the center portion, and a shaft hole into which the small diameter portion of the guide shaft is inserted is formed in the center portion.
In both cases, the outer diameter is slightly larger than the large diameter part of the guide shaft.
Become more and heard elastic support member, the guide on the fixed substrate
Provide a support hole slightly larger than the large diameter part of the
The guide is inserted by inserting the elastic support member into the support hole.
The shaft is fixed to the fixed substrate and the guide plate is fixed.
A guide shaft fixing device , wherein a part of a large diameter portion of a shaft is inserted into the support hole .