JPH11149765A - Board for disc player - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent disconnection due to contact of a flexible board with longitudinal burs formed around a position of a disc board pressed with ejector pin by forming the face of the disc board touching the flexible board during moving operation of an optical pickup higher at the part abutting against the ejector pin as compared with other part. SOLUTION: Upon ending synthetic resin molding of a disc board 4, longitudinal burrs 12 are formed at a position 11 abutting against an ejector pin. Contact face 13 between the lower surface 4A of the disc board 4 and the a flexible board is formed higher than the longitudinal burs 12 except the position 11 abutting against the ejector pin. Height of the contact face 13 is very low and has no adverse effect on the thinning of the board. Since the longitudinal burrs 12 do not project downward, the flexible board does not touch the longitudinal burrs 12 and the contact face thereof can be prevented from being cut.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a substrate device for a disk player which is configured to read out a signal recorded on a disk by an optical pickup.

[0002]

2. Description of the Related Art An optical disk player configured to perform a reproducing operation by performing an operation of reading a signal recorded on a disk using an optical pickup has become widespread. An optical pickup incorporated in such a disc player is provided so as to be able to move in the radial direction of the disc, and is electrically connected to a printed wiring board in which an electric circuit is incorporated by a flexible substrate. .

[0003] The flexible substrate is displaced in accordance with the moving operation of the optical pickup. Such a technique is disclosed in, for example, Japanese Utility Model Publication No. 4-13838.

[0004]

The flexible substrate is
Although the optical pickup is configured to deform and follow the movement of the optical pickup, when such an optical pickup is incorporated in a thin disc player, the light beam emitted from the optical pickup by the flexible substrate is Is brought into contact with the disk substrate in which the opening for guiding the signal to the signal surface of the disk is formed.

The above-mentioned disk substrate is generally formed of a synthetic resin for reasons such as reduction in weight of the disk player and reduction in manufacturing cost. When a disk substrate is formed from a synthetic resin, it is necessary to release the substrate from the mold, and this release operation is performed by pressing and displacing the disk substrate with a member called an ejector pin. The position of the disk substrate pressed by the ejector pins is a position where the flexible substrate comes into contact because the surface on which the opening is formed is formed to be thin.

FIG. 4 shows the relationship between the disk substrate 1 and the ejector pins 2 during the conventional molding process. When the molding is completed, the vertical burrs 3 are formed on the periphery of the position where the ejector pins 2 are pressed. A so-called protrusion will be formed. As a result, the flexible substrate comes into contact with the vertical burr 3 with the movement of the optical pickup,
There is a problem that the contact surface of the flexible substrate is scraped and the pattern is disconnected. In particular, when a resin in which glass fibers are mixed to increase the hardness as a synthetic resin is used, there is a problem in that the contact surface of the flexible substrate is quickly scraped.

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

[0008]

According to the present invention, there is provided a substrate player having a disk substrate provided with a synthetic resin disk substrate, wherein an ejector in a contact surface of the disk substrate with which the flexible substrate comes into contact when the optical pickup is moved. It is configured such that the surface around the portion where the pin contacts is formed high.

[0009]

1 is a bottom view showing one embodiment of the present invention, and FIG.
Is a side sectional view showing a main part of the present invention, and FIG. 3 is a side sectional view showing a main part of the present invention.

4 is a disk player cabinet 5
A guide member 8 for guiding a radial movement of an optical pickup 7 for reading out a signal recorded on the disk 6 is a disk substrate incorporated in the inside and molded with a synthetic resin. An opening 9 which is attached and fixed and guides a light beam emitted from the optical pickup 7 to a signal surface of the disk 6 is formed.

Reference numeral 10 denotes a flexible substrate which is fixed to the cabinet 5 and connects a printed wiring board (not shown) in which an electric circuit is incorporated and the optical pickup 7 to each other. It is configured to be displaced following a moving operation. In addition, as the disk player becomes thinner, the flexible substrate 10 comes into contact with the lower surface 4A of the disk substrate 4 as shown in FIG.

Reference numeral 11 denotes a position where an ejector pin comes into contact when the molding of the disk substrate 4 with synthetic resin is completed.
A vertical burr 12 is formed on the trace. Reference numeral 13 denotes a contact surface of the lower surface 4A of the disk substrate 4 with the flexible substrate 10, and is formed so that a portion other than a position 11 where the ejector pin contacts is higher than the vertical burr 12. The height of the vertical burr 12 is generally 0.0
Since it is 1 to 0.02 mm, the height of the contact surface 13 is
It is set to about 0.05 mm. Since this value is very small, it does not adversely affect the thinning of the disc player.

According to such a configuration, since the vertical burrs 12 do not protrude below the contact surface 13 as shown in FIG. 3, the flexible substrate 10 does not come into contact with the vertical burrs 12, and The scraping of the contact surface can be prevented.

As a method for reducing the thickness and weight of the disk player, a method of reducing the thickness of the disk substrate 4 has been adopted. However, if the thickness of the disk substrate 4 is reduced, the strength is reduced. is there. For this reason, recently, a technique for molding the disk substrate 4 using a synthetic resin mixed with glass fibers in order to maintain strength has been developed, and a molding technique using a synthetic resin mixed with such glass fibers has been developed. The effect of the present invention is further enhanced when the present invention is applied to the disk substrate 4 that has been used.

[0015]

According to the substrate apparatus of the present invention, in a disk player having a disk substrate made of a synthetic resin, an ejector pin in a contact surface of the disk substrate with which the flexible substrate comes into contact when the optical pickup is moved. Since the peripheral surface of the portion is formed high, even if a vertical burr is formed in a portion where the ejector pin contacts, the vertical burr does not contact the flexible substrate, thereby preventing the flexible substrate from being scraped.

Further, when the present invention is applied to a disk player having a disk substrate formed of a synthetic resin mixed with glass fibers, the effect of the present invention is further enhanced because the action of shaving the flexible substrate is increased. .

[Brief description of the drawings]

FIG. 1 is a bottom view showing one embodiment of a substrate device of the present invention.

FIG. 2 is a side sectional view showing a main part of the substrate device of the present invention.

FIG. 3 is a side sectional view showing a main part of the substrate device of the present invention.

FIG. 4 is a side view showing a main part of a conventional substrate device.

[Explanation of symbols]

 4 Disc Board 6 Disc 7 Optical Pickup 9 Opening 10 Flexible Board 12 Vertical Burr 13 Contact Surface

Claims (2)

[Claims] 1. A disk player having an optical pickup, which is provided so as to be able to move a disk in a radial direction and is connected to a printed wiring board in which an electric circuit is incorporated, and a flexible substrate. An opening for guiding the light beam emitted from the optical pickup to the signal surface of the disc is formed, and a contact surface with which the flexible substrate contacts when the optical pickup is moved is provided, and is formed of synthetic resin. A disk device comprising: a disk substrate; and a surface around a portion of the contact surface of the disk substrate with which an ejector pin comes into contact is formed high. 2. The disk substrate according to claim 1, wherein the disk substrate is formed of a synthetic resin mixed with glass fibers.
The substrate device according to item 1.