JP3223124B2 - 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 an optical pickup for reading a signal recorded on a disk.

[0002]

2. Description of the Related Art An optical disk player that optically reads a signal recorded on a disk using an optical pickup has become widespread. However, such an optical pickup rotates 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 move the disk in the radial direction with high accuracy. Generally, the optical pickup has a cylindrical shape fixed to a fixed substrate. Is configured to guide the movement operation.

[0003]

As an optical disc player, a CD player is generally widely used. Among such CD players, there are audio players and computers for reproducing and listening to signals such as music. There is a CD-ROM player used in combination with.

A guide shaft fixing device used in such a disc player will be described with reference to FIGS. 5, 6 and 7. FIG. 5 is a side sectional view of a main part showing a conventional guide shaft fixing device, FIG. 6 is a front view of the main part, and FIG. 7 is a front sectional view of the main part.

In FIG. 1, reference numeral 1 denotes a chassis, in which a support groove 3 for supporting an end of a cylindrical guide shaft 2 is formed, and a screw hole 5 into which a mounting screw 4 is screwed is formed. In such a configuration, the lower end 3 </ b> A of the support groove 3 is formed in a semicircular shape having the same diameter as the guide shaft 2.

In such a configuration, the guide shaft 2 is mounted and fixed to the chassis 1 by screwing the mounting screw 4 into the screw hole 5 in a state where the guide shaft 2 is placed in the support groove 3. FIG. 5 shows a state of being fixed and attached in this manner.

Since a CD-ROM player needs to perform a signal reading operation and an operation called a search at a higher speed than an audio player, the CD-ROM player has to fix a guide shaft for movably supporting an optical pickup. It must be done accurately and reliably. In the above-mentioned conventional fixing device, there is a problem that the fixing force of the mounting screw 4 to the guide shaft 2 is insufficient, and as a result, rattling occurs in the guide shaft 2 while the moving operation of the optical pickup is repeatedly performed. .

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

[0009]

According to the present invention, there is provided a fixing device which supports one end of a cylindrical guide shaft and has a circular shape having the same diameter on both sides of a lower end portion deformed by the guide shaft. And a screw hole formed in the chassis and having a support groove formed therein, and a screw hole into which a mounting screw for fixing the guide shaft is screwed.

[0010]

FIG. 1 is a side sectional view of a main part of a guide shaft fixing device of the present invention, FIG. 2 is a front view showing a main part of the guide shaft fixing device of the present invention, and FIG. FIG. 4 is a front cross-sectional view of a main part showing a guide shaft fixing device of the present invention for explaining an attaching operation.

In FIG. 1, reference numeral 6 denotes a chassis, in which a support groove 8 for supporting an end of a cylindrical guide shaft 7 is formed, and a screw hole 10 into which a mounting screw 9 is screwed is formed. In such a configuration, the lower end 8A of the support groove 8 has a horizontal shape, and both sides 8B and 8C have a circular shape having the same diameter as the diameter of the guide shaft 2.

In such a configuration, the guide shaft 7 is screwed into the screw hole 10 when the guide shaft 7 is placed in the support
At this time, the lower end 8A of the support groove 8 is deformed by a pressing force below the guide shaft 7, that is, in a direction perpendicular to the axial direction of the guide shaft 7. FIG. 1 and FIG. 4 show a state where it is attached and fixed in this way.

FIG. 3 shows a state in which the end of the guide shaft 7 is placed in a support groove 8 formed in the chassis 6, and the guide shaft 7 is attached to the support groove 8. In a state supported by the lower end 8A. In such a state, the upper portion of the guide shaft 7 projects upward from the upper surface of the chassis 6 as illustrated. In such a state, when the mounting screw 9 is screwed into the screw hole 10 from above, the mounting screw 9
The lower surface of the head abuts on the upper portion of the guide shaft 7,
The guide shaft 7 is pressed downward. As a result, the lower end portion 8A of the support groove 8 in a state where the lower portion of the guide shaft 7 is in contact with the lower end portion 8A is deformed by the pressing force, and the lower end portion 8A is, as shown in FIG. 7, which is continuous with the both sides 8B and 8C, and forms a semicircular portion together with the both sides 8B and 8C.

In this embodiment, the lower end 8A of the support groove 8 is provided.
Although the shape of is made horizontal, the shape can be variously changed. Further, by making the shape of the lower end portion symmetrical, the pressing deformation force received from the guide shaft can be made equal left and right, and the lower end portion can be favorably deformed.

[0015]

According to the guide shaft fixing device of the present invention, when the guide shaft is fixed to the chassis by screwing the mounting screw into the screw hole, the lower end of the support groove is deformed by the pressing force of the guide shaft. As a result, the fixed supporting force of the guide shaft can be increased, and as a result, rattling of the guide shaft can be prevented.

Further, according to the present invention, since the lower end portion which is formed by the guide shaft and which is deformed by the guide shaft is made symmetrical in the left and right directions, the pressing deformation force received from the guide shaft can be made equal left and right. The deformation operation of the portion can be performed well.

The present invention has the advantage that the shape of the mold for injection-molding the chassis made of synthetic resin is simplified because the support groove is formed and the shape of the lower end deformed by the guide shaft is made horizontal. have.

[Brief description of the drawings]

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

FIG. 2 is a front view showing a main part of the guide shaft fixing device of the present invention.

FIG. 3 is a front sectional view of a main part for describing an operation of attaching the guide shaft of the present invention.

FIG. 4 is a front sectional view of a main part showing a guide shaft fixing device of the present invention.

FIG. 5 is a side sectional view of a main part showing a conventional guide shaft fixing device.

FIG. 6 is a front view of a main part showing a conventional guide shaft fixing device.

FIG. 7 is a front sectional view of a main part showing a conventional guide shaft fixing device.

[Explanation of symbols]

 6 Chassis 7 Guide shaft 8 Support groove 8A Lower end 9 Mounting screw 10 Screw hole

Claims (3)

(57) [Claims] 1. A chassis made of a synthetic resin which supports one end of a cylindrical guide shaft and has a support groove formed on both sides of a lower end portion in a circular shape having the same diameter as that of the guide shaft. A screw hole formed in the chassis and screwed with a mounting screw for fixing the guide shaft, and the guide shaft is perpendicular to the axial direction by screwing the mounting screw into the screw hole. The guide shaft is fixed to a chassis by pressing the guide shaft in a direction and deforming a lower end portion of the support groove by the pressing force. 2. The fixing device according to claim 1, wherein the shape of the lower end of the support groove is symmetrical. 3. The fixing device according to claim 1, wherein the shape of the lower end of the support groove is made horizontal.