JPH0310315U

JPH0310315U -

Info

Publication number: JPH0310315U
Application number: JP6785689U
Authority: JP
Priority date: 1989-06-09
Filing date: 1989-06-09
Publication date: 1991-01-31

Description

[Brief explanation of drawings]

第１図はこの考案の実施例の対物レンズアクチ
ユエータの対物レンズ保持部材の平面図、第２図
は同対物レンズアクチユエータの縦断面図、第３
図は同対物レンズアクチユエータの底面図、第４
図はバランサ取付構造の実施例を示す一部縦断面
図、第５図は同バランサ取付構造を示す底面図、
第６図はバランサ取付構造の他の実施例を示す一
部縦断面図、第７図は同バランサ取付構造を示す
底面図、第８図はバランサ取付構造の他の実施例
を示す一部縦断面図、第９図は同バランサ取付構
造を示す側面図、第１０図は同バランサ取付構造
を示す底面図、第１１図、第１２図および第１３
図はそれぞれバランサ取付構造の他の実施例を示
す一部縦断面図、第１４図は従来のバランサの取
付構造を示す縦断面図、第１５図は同バランサの
取付構造を示す底面図である。１……対物レンズ保持部材、２……バランサ取
付穴、３……バランサ、４……軸受け、５……雌
ねじ、６……溝、７……調整ねじ。 FIG. 1 is a plan view of an objective lens holding member of an objective lens actuator according to an embodiment of this invention, FIG. 2 is a longitudinal sectional view of the same objective lens actuator, and FIG.
The figure is a bottom view of the same objective lens actuator.
The figure is a partial vertical sectional view showing an example of the balancer mounting structure, and FIG. 5 is a bottom view showing the same balancer mounting structure.
Fig. 6 is a partial longitudinal sectional view showing another embodiment of the balancer mounting structure, Fig. 7 is a bottom view showing the same balancer mounting structure, and Fig. 8 is a partial longitudinal sectional view showing another embodiment of the balancer mounting structure. 9 is a side view showing the balancer mounting structure, FIG. 10 is a bottom view showing the balancer mounting structure, FIGS. 11, 12, and 13.
The figures are a partial longitudinal cross-sectional view showing other embodiments of the balancer mounting structure, FIG. 14 is a longitudinal cross-sectional view showing a conventional balancer mounting structure, and FIG. 15 is a bottom view showing the balancer mounting structure. . DESCRIPTION OF SYMBOLS 1...Objective lens holding member, 2...Balancer mounting hole, 3...Balancer, 4...Bearing, 5...Female thread, 6...Groove, 7...Adjustment screw.

Claims

[Scope of utility model registration request]

An objective lens for an optical pickup, in which an objective lens holding member to which an objective lens is fixed is slidably and rotatably attached to a base, and a balancer is attached to a balancer mounting hole formed at one end of the objective lens holding member. In the actuator, a female thread is formed in the balancer mounting hole of the objective lens holding member, the balancer is screwed into the female thread, and the balancer is formed to be movable in a predetermined direction by adjusting the screw. Objective lens actuator for optical pickup.