JP2664588B2 - Method for fixing flexible substrate for optical pickup - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of fixing a flexible board for connecting an optical pickup for optically reading a signal recorded on a disk and an electric circuit board.

[0002]

2. Description of the Related Art An optical disk player for optically reading a signal recorded on a disk by using an optical pickup has become widespread. However, such an optical pickup has a driving force of an electric motor in a radial direction of the disk. It is configured to be moved by.

[0003] In such a disc player,
A flexible substrate is used as a means for connecting the optical pickup to an electric circuit board in order to perform a power supply operation to a laser diode or a focusing coil incorporated in the optical pickup and an output operation of a signal obtained from the optical pickup. As such a technique, for example, there is a technique described in Japanese Utility Model Laid-Open No. 2-101367.

[0004]

A flexible substrate used in such an optical pickup device is formed by printing electrical wiring on a flexible synthetic resin thin plate with a conductive material. An end of the flexible substrate is fixed to a printed wiring board provided in the optical pickup device by soldering, and the other end is fixed to an electric circuit board incorporated in the disk player body by soldering. Have been.

In such a disk player, the optical pickup device needs to move in the radial direction of the disk in order to read out a signal recorded on the disk.
Therefore, in such a device, a curved portion that allows movement of the optical pickup device is provided in an intermediate portion of the flexible substrate.

In such a device, when the end of the flexible substrate is soldered to a printed wiring board provided in the optical pickup device and an electric circuit board incorporated in the disk player body, the pattern surface of the flexible substrate is soldered. Must be reversed, and generally, one flexible substrate is folded back at an intermediate portion. And the middle part of the flexible board is fixed to the fixed board,
Conventionally, such a fixing operation and a bonding operation of the folded portion have been performed using a cushion material with a double-sided tape. Therefore, not only does it require cushioning parts,
There was a problem that workability was poor. An object of the present invention is to provide a method for fixing a flexible substrate in which this point is improved.

[0007]

According to the present invention, the folded surface of a flexible substrate for connecting an optical pickup and an electric circuit board is bonded with an adhesive, and the flexible substrate is fixed to the fixed substrate by the adhesive applied to the protruded folded surface. It is intended to be fixed.

[0008]

1 is a view showing a state in which a flexible substrate is fixed to a fixed substrate, FIG. 2 is a view showing a state in which an adhesive is applied to a flexible substrate, and FIG.
The figure is a diagram showing a state where the folded portion of the flexible substrate is bonded.

In FIG. 1, reference numeral 1 denotes a flexible substrate, and a pattern 2 is wired on the back surface in FIG.
Reference numeral 3 denotes a connection pattern provided at an end of the flexible substrate 1, which is attached and fixed to an electric circuit board (not shown) incorporated in the main body of the disc player by soldering.

Reference numerals 4 and 5 denote connection pattern portions constituting the flexible substrate 1, the ends of which are connected to a printed wiring board (not shown) provided in the optical pickup device and the optical pickup device. The optical pickup device is curved to allow movement of the optical pickup device between the optical pickup device and the optical pickup device.

Reference numerals 6 and 7 denote through holes formed in the flexible substrate 1, and reference numerals 8 and 9 denote semicircular notches formed on the fold lines A of the flexible substrate 1. It is provided to easily perform the folding operation of the substrate 1. In FIG. 2, a hatched portion B is a portion to which an adhesive is applied.

In FIG. 1, reference numeral 10 denotes a fixed substrate in which a turntable for rotating a disk, a drive mechanism for moving an optical pickup device, and the like are incorporated, and a fixed portion 11 for fixing an intermediate portion of the flexible substrate 1 is provided. Is formed.

The flexible substrate for an optical pickup according to the present invention is configured as described above. Next, a method for fixing the flexible substrate will be described.

First, the ends of the connection patterns 4 and 5 constituting the flexible substrate 1 are connected and fixed to a printed wiring board provided in an optical pickup device.
The optical pickup device is mounted so as to be movable in the radial direction of the disk by a guide shaft (not shown) incorporated in the fixed substrate 10.

In such a state, the printed wiring board 1
Is applied to the folded portion of the intermediate portion, that is, the portion shown by oblique lines B in FIG. After applying the adhesive to the folded portion, the folded portion is trough-folded about the folded line A to obtain the state shown in FIG.

When the folded portion is valley-folded, a state shown in FIG. 3 is obtained. In this state, the flexible substrate 1 faces the portion B on which the adhesive is applied on the surface constituting the non-folded portion. The surfaces to be bonded will be glued together. Since the area of the portion to which the adhesive is applied is larger than the area of the portion to be bonded among the portions constituting the non-folded portion, in FIG.
The portion indicated by will protrude.

In the state shown in FIG. 3, the folded portion is pressed against the fixed portion 11 formed on the fixed substrate 10. When such a pressing operation is performed, an adhesive is applied to a portion indicated by oblique lines C in FIG. 3, so that the intermediate portion of the flexible substrate 1 is bonded and fixed to the fixing portion 11 by the adhesive force.

In this manner, the intermediate portion of the flexible substrate 1 is bonded and fixed to the fixing portion 11 of the fixed substrate 10,
By soldering the connection pattern 3 provided at the end of the flexible substrate 1 to the electric circuit board, the optical pickup device and the electric circuit board can be electrically connected.

[0019]

According to the present invention, the folded surface of the flexible substrate for connecting the optical pickup and the electric circuit board is bonded with an adhesive and the flexible substrate is fixed by the adhesive applied to the protruding folded surface. Since it is fixed to the substrate, the mounting operation can be performed easily as compared with the conventional case. Particularly, when the present invention is applied to a portable disk player which needs to be miniaturized, a great effect can be obtained.

[Brief description of the drawings]

FIG. 1 is a view showing a state in which a flexible substrate is fixed to a fixed substrate by a fixing method of the present invention.

FIG. 2 is a diagram showing a state where an adhesive is applied to a flexible substrate.

FIG. 3 is a diagram showing a state in which a folded portion of a flexible substrate is bonded.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flexible board 2 Pattern 10 Fixed board 11 Fixed part

Claims (1)

(57) [Claims] 1. A disc player comprising: an optical pickup that moves in a radial direction of a disc and optically reads a signal recorded on the disc; and a flexible board that connects the optical pickup to an electric circuit board. In the above, the flexible substrate is folded back between the optical pickup and the electric circuit board so as to invert the pattern surface of the flexible substrate, and the folded surface is adhered with an adhesive and applied to the protruded folded surface. A method for fixing a flexible substrate for an optical pickup, wherein the flexible substrate is bonded and fixed to a fixed substrate with an agent.