JPH01109820U

JPH01109820U -

Info

Publication number: JPH01109820U
Application number: JP500088U
Authority: JP
Priority date: 1988-01-18
Filing date: 1988-01-18
Publication date: 1989-07-25

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例を示す要部の断面
図で、湾曲した支持板を締付け、固定した状態を
示しており、第２図は第１図の押え板の断面図、
第３図はこの考案の他の実施例による湾曲した支
持板を締付け、固定したものを示す断面図、第４
図は第３図の筐体の断面図である。第５図は従来
の光ヘツドの光検知器固定装置を示す一部断面の
正面図、第６図は第５図の右側面図、第７図は従
来の湾曲した支持板を締付け、固定した状態を示
す断面図、第８図は第７図の支持板の断面図であ
る。図中、３，２２は筐体、３ａはフランジ面、４
は光検知器、５は支持板、６，２１は押え板、５
ａ，６ａ，２１ｂは取付け用穴、２１ａ，２２ａ
は突起面、７は固定用ねじである。尚、図中同一
符号は同一または相当部分を示す。 Fig. 1 is a cross-sectional view of the main parts of an embodiment of this invention, showing a state in which the curved support plate is tightened and fixed, and Fig. 2 is a cross-sectional view of the presser plate shown in Fig. 1;
FIG. 3 is a sectional view showing another embodiment of the invention in which a curved support plate is tightened and fixed;
The figure is a sectional view of the casing of FIG. 3. Fig. 5 is a partially sectional front view showing a conventional optical head photodetector fixing device, Fig. 6 is a right side view of Fig. 5, and Fig. 7 is a conventional curved support plate tightened and fixed. A sectional view showing the state, FIG. 8 is a sectional view of the support plate of FIG. 7. In the figure, 3 and 22 are the housing, 3a is the flange surface, and 4
is a photodetector, 5 is a support plate, 6, 21 is a presser plate, 5
a, 6a, 21b are mounting holes, 21a, 22a
is a protruding surface, and 7 is a fixing screw. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims

[Scope of utility model registration request]

The housing includes an optical system that condenses the laser beam from the light source onto the disk using a condensing system such as an objective lens and receives reflected light from the disk. A support plate made of a non-metallic material such as ceramic that is integrated with a photodetector having multiple light-receiving areas and a presser plate placed in front of this support plate are tightened and fixed using fixing screws. A protruding surface is provided from the center of the flange surface of the holding plate or the housing, and the protruding surface and the supporting plate are pressed against the central part and tightened to the flange surface of the housing,
A photodetector fixing device for an optical head, characterized in that the photodetector is fixed.