JP3469818B2 - 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 disc.

[0002]

2. Description of the Related Art Optical disc players, which optically read a signal recorded on a disc using an optical pickup, have come into widespread use. Such an optical pickup is designed to rotate an electric motor in the radial direction of the disc. 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 disc, it is necessary to accurately move the disc in the radial direction. Generally, the guide shaft fixed to the fixed substrate is used. The moving motion is guided by the. An example of such a guide shaft fixing device is described in Japanese Patent Application Laid-Open No. 7-57404.

[0003]

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

A disc player used in combination with a computer is required to have an increased recording capacity, and the density of signals recorded on the disc tends to increase. When performing the read 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.

The present invention seeks to provide a fixing device for a guide shaft which can make the relationship between the optical axis of the laser and the normal line of the signal track accurate.

[0006]

A guide shaft fixing device of the present invention includes a guide post fixed to a fixed base plate and fixed to a motor base plate constituting a spindle motor; and a guide post fixed to the fixed base plate. The support member is configured to support one end of a guide shaft that moves the pickup in the radial direction of the disc, and the support member is positioned by bringing the support member into contact with the guide post.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a plan view of an essential part showing a guide shaft fixing device of the present invention, and FIG. 2 is a sectional view taken along the line AB of FIG.

Reference numerals 1, 2 and 3 are guide posts fixed to a fixed substrate 4, and 5 is a motor substrate which constitutes a spindle motor for rotationally driving a disk. A bearing 7 for supporting a rotary 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 is a collar portion formed below the guide post 1, and 12 is a support member fixed to the fixed substrate 4 by a screw 13 and made of synthetic resin. The collar portion 1A and the fixed substrate 4 are provided. A tongue portion 12A fitted between and a U-shaped rib 12B for sandwiching the collar portion 1A are integrally formed. Reference numeral 14 is a pickup supporting member on which a pickup (not shown) is mounted, 15 is a guide shaft having a groove 15A for pickup feeding formed on the periphery, and one end 15B is a support shaft formed on the supporting member 12. It is rotatably supported by a support space 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). .

An engaging portion (not shown) which engages with a groove 15A formed in the guide shaft 15 is formed in the pickup supporting member 14, and the diameter of the disk is rotated by the rotating operation of the guide shaft 15. It is configured to be displaced in the directions of arrows P and Q, which are the directions. Reference numeral 12E is an elastic restriction portion provided by forming a through hole 12F in the support member 12, and when the pickup support member 14 is displaced toward the inner peripheral side, that is, the arrow P direction, It abuts and regulates further displacement.

The present invention is configured as described above, and according to this configuration, the positioning of the support member 12 that supports the guide shaft 15 is fixed to the collar portion 1A formed on the guide post 1. This is performed by fitting the tongue portion 12A into the space formed by the board 4 and the U-shaped rib 12B sandwiching the collar portion 1A. That is, since the support member 12 is positioned by the guide post 1, the guide shaft 15 and the guide post 1 supported by the support member 12 are positioned.
Therefore, the positional relationship with the motor substrate 5 positioned by can be set accurately.

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 the position of the pickup at the inner peripheral position can be accurately controlled but also at the time of collision. Can absorb the shock of.

[0013]

According to the guide shaft fixing device of the present invention, a pickup feeding groove is formed on the periphery and a supporting member for supporting one end of the guide shaft for moving the pickup in the radial direction of the disk by the rotation operation of the spindle. Since the tongue portion formed on the supporting member is fitted between the flange portion provided on the guide post to which the motor substrate constituting the motor is fixed and the fixed substrate, the positioning is performed. Not only can the positional relationship between the motor and the guide shaft, that is, the positional relationship between the disk and the pickup, be set accurately, but also the fixing operation of the support member can be performed accurately and firmly.

[0014]

Further, according to the present invention, the guide post is provided with the flange portion, and the U-shaped rib for sandwiching the flange portion is formed.
Since the mounting position of the support member is regulated by the abutment of the U-shaped rib with the flange portion, 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 toward the inner peripheral side is formed on the support member, not only the position of the pickup at the inner peripheral position can be accurately controlled, but also It can absorb the impact of a collision.

[Brief description of drawings]

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

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

[Explanation of symbols]

1 Guide post 1A Tsuba 4 fixed board 5 motor board 12 Support member 12A tongue 12B U-shaped rib 12E Elasticity control part 14 Pickup support member 15 Guide shaft

Continuation of the front page (56) Reference JP-A-8-279256 (JP, A) JP-A-8-138351 (JP, A) JP-A-62-183068 (JP, A) JP-A-62-88186 (JP , A) JP 11-297008 (JP, A) JP 11-144410 (JP, A) JP 9-306119 (JP, A) JP 10-340550 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G11B 21/00-21/06

Claims (3)

(57) [Claims] 1. A guide post fixed to a fixed substrate and having a motor substrate constituting a spindle motor fixed thereto by a screw, and a pickup which is fixed to the fixed substrate and rotationally moves a pickup in a radial direction of a disk. There is a pickup feed groove to move
Become more a support member for supporting one end of that guide shaft, a flange portion provided on said guide posts, the fixed substrate and the collar portion
The tongue formed on the support member between the
Guide shaft fixing device being characterized in that to perform the positioning of the support member by the. 2. A U-shaped rib for holding the collar portion on the support member.
And a supporting portion formed by contacting the U-shaped rib with the collar portion.
Guide shaft fixing apparatus according to claim 1, characterized in that the so that to regulate the mounting position of the timber. 3. The pickup moves to the inner peripheral side on the support member.
When the pickup is equipped with the pickup
The guide shaft fixing device according to claim 1, wherein an elastic restriction portion is formed so as to contact the support member .