JPH06290555A - Guide device for optical pick-up - Google Patents

Abstract

PURPOSE:To make the assembly work of an optical pick-up system easy by supporting one end of a pick-up supporting members slidablly and forming a narrow-width rail part in the lower plane of a guide rail engaging with a guide groove. CONSTITUTION:The mounting of the pick-up supporting members 2 is so performed that the guide groove 6a formed in the mounting foot piece 6 of the pick-up supporting members 2 is engaged with the guide rail 9 and then a guide shaft 7 inserted in holes 4a and 5a formed in mounting foot pieces 4 and 5 is fitted and fixed to a fixing base plate 1 with screw 8. Further in the process of these mounting works, the engaging work of the guide groove 6a with the guide rail 9 is performed from a obliquely under direction, When the engaging work is performed, the work is performed smoothly since the narrow-width rail part 9a is formed in the lower plane of the guide rail 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guide 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 signals recorded on a disc using an optical pickup, have come into widespread use. It is configured to be moved by a driving force. Since such an optical pickup needs to accurately read a signal recorded on the disc, it is necessary to accurately move the disc in the radial direction, and it is generally fixed to a fixed substrate. The guide shaft of the book is configured to guide the movement. A device for guiding the movement of the optical pickup by two guide shafts is disclosed in, for example, Japanese Patent Laid-Open No. 3-205662.

[0003]

As a typical optical disc player, a CD player is well known, and some of the CD players are configured to listen to a reproduced sound by headphones. There is a headphone stereo type portable CD player.
Since such a portable CD player is used while being carried, there is a demand for downsizing, particularly thinning.

Since the technique described in the above-mentioned publication is constructed so that the moving operation of the optical pickup is guided by the two guide shafts, the assembling work is facilitated when incorporated in a small disc player. There is a problem that can not be done.

The present invention is intended to provide a guide device for an optical pickup, which is improved in this respect.

[0006]

The guide device of the present invention comprises:
A pickup support member to which an optical pickup for reading a signal recorded on a disc is fixed, a guide shaft for slidably supporting one end of the pickup support member, and a pickup substrate provided on a fixed substrate. The guide rail is engaged with a guide groove formed in the member and slidably supports the other end of the pickup supporting member.

[0007]

According to the present invention, the narrow rail portion is formed on the lower surface of the guide rail so as to be in contact with the surface of the pickup supporting member on which the guide groove is formed.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a bottom view of an essential part showing a guide device of the present invention, and FIG. 2 is a sectional view of the essential part showing a state during assembly.
FIG. 3 is a cross-sectional view of a main part showing an assembled state.

In the figure, 1 is a fixed substrate to which an electric motor (not shown) for rotating the disc is fixedly mounted, and 2 is a pickup support to which an optical pickup 3 for reading a signal from the disc is fixed. It is a member, and mounting leg pieces 4, 5, and 6 are formed.

Reference numeral 7 denotes a guide shaft which is fixedly mounted on the fixed substrate 1 by a screw 8. The guide shaft 7 is inserted into the holes 4a and 5a formed in the mounting leg pieces 4 and 5 to slide one end of the pickup support member 2. It has a function of movably supporting. Reference numeral 9 denotes a guide rail provided on the fixed substrate 1, which engages with a guide groove 6a formed on the mounting leg piece 6 and slidably supports the other end of the pickup support member 2. have.

In such a structure, the guide rail 9 is provided.
A narrow rail portion 9a is formed on the lower surface of the abutting surface S that forms the guide groove 6a.

The guide device of the present invention is constructed as described above. Next, the assembling operation of the guide device will be described. The mounting operation of the pickup supporting member 2 to the fixed substrate 1 is performed by engaging the guide groove 6a formed in the mounting leg piece 6 of the pickup supporting member 2 with the guide rail 9,
The guide shaft 7 inserted into the holes 4a and 5a formed in the mounting leg pieces 4 and 5 is fixed by a screw 8.

Then, in the step of such an attaching operation, the engaging operation of the guide groove 6a with the guide rail 9 is performed obliquely from below as shown in FIG. Since the narrow rail portion 9a is formed on the lower surface of the guide rail 9 when performing the engaging operation, the engaging operation can be smoothly performed. As shown in FIG. 2, when the guide groove 6a is engaged with the guide rail 9 and the opposite side of the pickup support member 2, that is, the mounting leg pieces 4 and 5 side is lifted, the state shown in FIG. 3 is obtained. The guide shaft 7 with the screw 8
It is attached and fixed to the fixed substrate 1.

By carrying out such an operation, the mounting operation of the pickup supporting member 2 to the fixed substrate 1 is carried out.
The pickup support member 2 is held in a state where the radial movement of the disc is guided by the guide shaft 7 and the guide rail 9. The support of the pickup support member 2 by the guide rail 9 is performed by the wide portion 9b which is the upper surface of the guide rail 9,
Even if the sliding displacement operation of the pickup supporting member 2 is repeatedly performed, abrasion of the contact portion can be reduced. Therefore, the height of the pickup support member 2, that is, the positional relationship of the optical pickup 3 with respect to the disc can be accurately maintained.

Further, in this embodiment, when the fixed substrate 1 is molded from synthetic resin, the guide rail 9 is integrally molded, and the number of parts is reduced, which is advantageous in that the structure is simplified and the size of the disc player is small. Has a great effect on conversion.

[0016]

According to the present invention, one end of a pickup supporting member to which an optical pickup is fixed is slidably supported, and the lower surface of a guide rail is engaged with a guide groove formed in the pickup supporting member. Since the narrow rail portion is formed, the engaging operation between the guide groove and the guide rail can be smoothly performed. Therefore, the guide device of the present invention can easily perform the assembling work of the optical pickup system, and has a very great effect when it is applied to a small-sized disc player.

[Brief description of drawings]

FIG. 1 is a bottom view of essential parts showing a guide device of the present invention.

FIG. 2 is a sectional view of an essential part showing a state in the course of assembly of the present invention.

FIG. 3 is a cross-sectional view of a main part showing an assembled state of the present invention.

[Explanation of symbols]

 1 Fixed board 2 Pickup support member 3 Optical pickup 6a Guide groove 7 Guide shaft 9 Guide rail 9a Narrow rail part

Claims (2)

[Claims] 1. A pickup supporting member to which an optical pickup for reading a signal recorded on a disc is fixed, a guide shaft slidably supporting one end of the pickup supporting member, and a fixed substrate. And a guide rail that engages with a guide groove formed in the pickup supporting member and slidably supports the other end of the pickup supporting member, and forms the guide groove on the lower surface of the guide rail. A guide device for an optical pickup, characterized in that a narrow rail portion that comes into contact with the surface is formed. 2. A pickup support member to which an optical pickup for reading a signal recorded on a disc is fixed, a guide shaft slidably supporting one end of the pickup support member, and another pickup support member. It consists of a guide rail that slidably supports the end,
A guide device for an optical pickup, wherein the guide rail is integrally formed on a fixed substrate made of synthetic resin.