JP2000331442A - Guide shaft fixing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a guide shaft fixing device for guiding the movement of a pickup for reading a signal recorded in a disk. SOLUTION: By abutting a supporting member 12 for supporting a guide shaft 15 provided to move a pickup in the diameter direction of a disk on a guide post 1 fixed to a fixing substrate 4, having a motor substrate 5 fixed thereto, the positioning of the supporting member 12 is carried out.

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 a disk, it is necessary to accurately move the disk in the radial direction, and generally, a guide shaft fixed to a fixed substrate is required. Is configured to guide the moving operation. An example of such a guide shaft fixing device is disclosed in Japanese Patent Application Laid-Open No. 7-57404.

[0003]

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

[0004] In a disk player used in combination with a computer, an increase in recording capacity is required, and the density of signals recorded on the disk tends to increase. In the case of performing the reading operation of the signal recorded in this way, the relationship between the optical axis of the laser emitted from the pickup and the track of the signal recorded on the disk, particularly the relationship with the normal line, is made accurate. There is a need.

SUMMARY OF THE INVENTION An object of the present invention is to provide a guide shaft fixing device which can make the relationship between the optical axis of a laser and the normal of a signal track accurate.

[0006]

A guide shaft fixing device according to the present invention includes a guide post fixed to a fixed substrate and to which a motor substrate constituting a spindle motor is fixed, and a guide post fixed to the fixed substrate. A support member for supporting one end of a guide shaft for moving the pickup in the radial direction of the disk; and positioning the support member by bringing the support member into contact with the guide post.

[0007]

FIG. 1 is a plan view of a main part showing a guide shaft fixing device according to the present invention, and FIG. 2 is a sectional view taken along the line AB in FIG.

Reference numerals 1, 2 and 3 denote guide posts fixedly mounted on a fixed substrate 4, and reference numeral 5 denotes a motor substrate which constitutes a spindle motor for driving a disk to rotate. The bearing 7 supports a rotating shaft 6 of the motor and a magnet. A drive coil 8 for generating a magnetic field for rotating a rotor (not shown) provided with
And 11 are fixed to the guide posts 1, 2 and 3.

Reference numeral 1A denotes a flange formed below the guide post 1. Reference numeral 12 denotes a support member fixed to the fixed substrate 4 with screws 13 and made of synthetic resin. 12A and a U-shaped rib 12B sandwiching the flange 1A are integrally formed. Reference numeral 14 denotes a pickup support member on which a pickup (not shown) is mounted, and reference numeral 15 denotes a guide shaft having a pickup feed groove 15A formed on a peripheral edge thereof, and a support shaft 15 having one end 15B formed on the support member 12. It is rotatably supported by a support space portion 12D provided between the portion 12C and the fixed substrate 4, and the other end is rotatably driven by a pickup feed motor (not shown). .

The pickup supporting member 14 has an engaging portion (not shown) for engaging with a groove 15A formed in the guide shaft 15, and the rotation of the guide shaft 15 causes the diameter of the disk to be increased. It is configured to be displaced in the directions of arrows P and Q. Reference numeral 12E denotes an elastic regulating portion provided by forming a through hole 12F in the support member 12, and when the pickup support member 14 is displaced in the inner peripheral side, that is, in the direction of arrow P, the pickup support member 14 It is in contact with and serves to regulate further displacement.

As described above, the present invention is configured, and according to such a configuration, the positioning of the support member 12 supporting the guide shaft 15 is fixed to the flange 1A formed on the guide post 1. The operation is performed by fitting the tongue portion 12A into the space formed by the substrate 4 and by clamping the flange portion 1A by the U-shaped rib 12B. That is, since the positioning of the support member 12 is performed by the guide post 1, the guide shaft 15 supported by the support member 12 and the guide post 1
Thus, the positional relationship with the motor substrate 5 positioned by the above can be accurately set.

Further, since the elastic restricting portion 12E for restricting the displacement of the pickup to the inner peripheral side is formed on the support member 12, not only can the position of the pickup at the inner peripheral position be accurately regulated, but also the position of the pickup can be reduced. Shock can be absorbed.

[0013]

According to the guide shaft fixing device of the present invention, a support member for supporting one end of a guide shaft for moving a pickup in a radial direction of a disk is brought into contact with a guide post on which a motor substrate constituting a spindle motor is fixed. Thus, the positioning of the support member is performed, so that the positional relationship between the spindle motor and the guide shaft, that is, the positional relationship between the disk and the pickup can be accurately set. Thus, according to the present invention,
The relationship between the optical axis of the laser emitted from the pickup and the normal of the signal track can be made accurate.

Further, according to the present invention, the guide post is provided with a flange, and the tongue formed on the support member is fitted between the flange and the fixed substrate. Can be performed accurately and firmly.

According to the present invention, a flange is provided on the guide post, and a U-shaped rib for holding the flange is formed.
Since the mounting position of the support member is regulated by the contact of the U-shaped rib with the flange, the mounting position of the support member can be made accurate.

Further, according to the present invention, since the elastic restricting portion for restricting the displacement of the pickup to the inner peripheral side is formed on the support member, not only can the position of the pickup at the inner peripheral position be regulated accurately, The impact at the time of collision can be absorbed.

[Brief description of the drawings]

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

FIG. 2 is a sectional view taken along the line AB in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Guide post 1A Flange part 4 Fixed substrate 5 Motor substrate 12 Support member 12A Tongue part 12B U-shaped rib 12E Elastic regulation part 14 Pickup support member 15 Guide shaft

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hideo Sekine 2-5-5 Keihanhondori, Moriguchi-shi, Osaka F-term in Sanyo Electric Co., Ltd. 5D068 AA02 BB01 CC03 GG05 GG13

Claims (4)

[Claims] 1. A guide post fixed to a fixed substrate and fixed to a motor substrate constituting a spindle motor, and one end of a guide shaft fixed to the fixed substrate and moving a pickup in a radial direction of the disk. And a support member that supports the guide post, and the support member is positioned by bringing the support member into contact with the guide post. 2. The guide post according to claim 1, wherein a flange is provided on the guide post, and a tongue formed on the support member is fitted between the flange and the fixed substrate. Guide shaft fixing device. 3. A flange is provided on the guide post, and a U-shaped rib sandwiching the flange is formed on the support member, and the mounting position of the support member is determined by abutting the U-shaped rib on the flange. The guide shaft fixing device according to claim 1, wherein the guide shaft is restricted. 4. The guide shaft fixing device according to claim 1, wherein the support member is provided with an elastic restricting portion that comes into contact with the support member of the pickup when the pickup moves to the inner peripheral side.