Fitting structure for fitting laser holder to base member

Abstract

A fitting structure for fitting a laser holder holding a semiconductor laser to a base member in an optical pickup device includes a support member of a metal plate that supports the laser holder. The support member integrally has: a base part having a laser passage hole that is formed in the center thereof for permitting laser light from the semiconductor laser to pass therethrough; an upper projecting part and a lower projecting part that respectively project from the upper and the lower edges of the base part so as to oppose each other and that support the laser holder so that the laser holder can swing about the vertical axis; and a bending part that is elastically deformable and that first projects from the upper edge of the base part toward a side opposite to a side toward which the upper projecting part projects and then is bent downward and also inward toward the base part. The base part is inserted from the lower projecting part along the plate-like fitting part of the base member, whereby the plate-like fitting part becomes sandwiched between the bending part and the base part by an elastic restoring force of the bending part, and then, after optical axis adjustment of the semiconductor laser, the laser holder, the support member, and the base member are fixed to one another with an adhesive.

Description

technical field [0001] The present invention relates to a coupling structure in an optical pickup for copying and recording on an optical disc such as a CD or DVD as an information recording medium. More specifically, the present invention relates to a mounting structure for mounting a laser holder for fixing a semiconductor laser to a base member. Background technique [0002] An optical pickup generally has an optical head that reciprocates in the radial direction of a rotating optical disc. The optical head is mainly composed of: a semiconductor laser, which acts as a light source and emits laser light; a photodetector, such as a photodiode, which finally receives and detects light reflected by the optical disc based on the laser light emitted by the semiconductor laser and then converts the light into electrical signal; an optical system, such as a diffraction grating, a half mirror, or an objective lens, which guides laser light emitted from a semiconductor laser to a ...

AI Technical Summary

Problems solved by technology

[0013] However, the above-mentioned conventional installation structure requires the holder 10 to be a separate member, so the performance of cost reduction that has been strongly demanded in recent years has been significantly limited.

Moreover, before the optical axis adjustment of the semiconductor laser 1 is performed, the holding member 10 and the plate-shaped mounting part 4 of the base member 3 need to be fixed to each other by bonding operation, which reduces work efficiency.

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