JPS58118541U

JPS58118541U - optical head

Info

Publication number: JPS58118541U
Application number: JP1337282U
Authority: JP
Inventors: 哲日下
Original assignee: ソニー株式会社
Priority date: 1982-02-02
Filing date: 1982-02-02
Publication date: 1983-08-12

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来装置の一例を示す斜視図、第２図及び第３
図はこの考案の一実施例を示す上面図及び縦断面図、第
４図及び第５図はこの考案の他の実施例を示す上面図及
び縦断面図、第６図は第４図及び第５図におけるコイル
の取り付は位置を示す構成図である。１０は対物レンズ、１１．２１はボビン、１２゜２２は
フォーカス用コイル、１３．２３はトラッキング用コイ
ル、１４．２４はヨーク、１５゜２５はマグネット、１
６．２６はスプリング、１７はピボット、１８はピボッ
ト受、２７は回転軸、２８は軸受である。Figure 1 is a perspective view showing an example of a conventional device, Figures 2 and 3 are
The figure shows a top view and a longitudinal sectional view of one embodiment of this invention, FIGS. 4 and 5 show a top view and a longitudinal sectional view of another embodiment of this invention, and FIG. FIG. 5 is a configuration diagram showing the mounting position of the coil. 10 is an objective lens, 11.21 is a bobbin, 12°22 is a focusing coil, 13.23 is a tracking coil, 14.24 is a yoke, 15°25 is a magnet, 1
6.26 is a spring, 17 is a pivot, 18 is a pivot receiver, 27 is a rotating shaft, and 28 is a bearing.

Claims

[Scope of utility model registration request]

a lens holder to which an objective lens is fixed; a first coil attached to the lens holder in the form of a voice coil;
a second coil consisting of a plurality of coils attached to the lens holder and formed in a substantially ring shape, the effective coils of the first coil and the second coil being arranged in a common magnetic circuit; . An optical head, wherein the lens holder is fixed to one end of a pair of springs, and the other end is rotatably attached to a fixed part.