JPH0310316U

JPH0310316U -

Info

Publication number: JPH0310316U
Application number: JP6785789U
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
ユエータの平面図、第２図は第１図におけるＡ−
Ａ断面図、第３図は第１図におけるＢ−Ｂ断面図
、第４図はこの考案の実施例の対物レンズ保持部
材の平面図、第５図は同対物レンズ保持部材を示
す縦断面図、第６図は同対物レンズ保持部材を示
す底面図、第７図は対物レンズ部分の分解斜視図
、第８図は第７図に示す位置決め溝部分の側面図
、第９図は対物レンズ部分の変形例を示す分解斜
視図、第１０図は対物レンズの位置決め溝部分の
例を示す側面図、第１１図ａ，ｂはそれぞれ対物
レンズの位置決め溝部分の例を示す平面図、第１
２図ａ，ｂおよびｃはそれぞれ対物レンズの位置
決め溝の例を示す断面図、第１３図ａは対物レン
ズの正面図、第１３図ｂは対物レンズの平面図、
第１４図ａおよびｂはそれぞれ他の実施例の対物
レンズ部分の分解斜視図および斜視図、第１５図
は従来の対物レンズアクチユエータを示す斜視図
である。１……対物レンズ保持部材、２……対物レンズ
、３……軸受け、４……フオーカシングコイル、
５……トラツキングコイル、７……バランサ、８
……取付基準面、９……位置決め溝、１０……位
置決め突起、１１……ベース、１２……主軸、１
３……ヨーク、１４……永久磁石、１５……弾性
支持部材。 FIG. 1 is a plan view of an objective lens actuator according to an embodiment of this invention, and FIG.
A sectional view, FIG. 3 is a BB sectional view in FIG. 1, FIG. 4 is a plan view of the objective lens holding member of the embodiment of this invention, and FIG. 5 is a longitudinal sectional view showing the same objective lens holding member. , Figure 6 is a bottom view showing the objective lens holding member, Figure 7 is an exploded perspective view of the objective lens part, Figure 8 is a side view of the positioning groove part shown in Figure 7, and Figure 9 is the objective lens part. 10 is a side view showing an example of the positioning groove portion of the objective lens, and FIGS. 11a and 11b are plan views showing examples of the positioning groove portion of the objective lens, respectively.
Figures 2a, b and c are cross-sectional views showing examples of positioning grooves of the objective lens, Figure 13a is a front view of the objective lens, Figure 13b is a plan view of the objective lens,
FIGS. 14a and 14b are an exploded perspective view and a perspective view of an objective lens portion of another embodiment, respectively, and FIG. 15 is a perspective view showing a conventional objective lens actuator. 1... Objective lens holding member, 2... Objective lens, 3... Bearing, 4... Focusing coil,
5...Trucking coil, 7...Balancer, 8
... Mounting reference surface, 9 ... Positioning groove, 10 ... Positioning protrusion, 11 ... Base, 12 ... Main shaft, 1
3... Yoke, 14... Permanent magnet, 15... Elastic support member.

Claims

[Scope of utility model registration request]

An objective of an optical pickup, in which an objective lens holding member is slidably and rotatably attached to a main shaft protruding from the base, and the objective lens is fixed to a mounting reference surface formed at one end of the objective lens holding member. In the lens actuator, a positioning groove or protrusion is formed on one side of the mounting reference surface of the objective lens holding member, and a protrusion or groove that engages with the positioning groove or protrusion is formed on the outer periphery of the objective lens. An objective lens actuator for an optical pickup, characterized in that the objective lens actuator is formed by: