JPH03110634U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図はこの考案の一実施例を示す分離型光学
ヘツド装置を備えた光磁気デイスク装置のシヤー
シを裏側より見た全体斜視図、第２図は同光学ヘ
ツド装置の概略断面図、第３図は従来例の分離型
光学ヘツド装置を備えた光磁気デイスク装置のシ
ヤーシを裏側より見た全体斜視図、第４図は同光
学ヘツド装置の概略断面図である。 ５……デイスク、５ａ……信号面、１０……光
学ヘツド装置、２０……固定部、２１ａ……光導
出入用の開口部、２２……レーザーダイオード（
光源）、２６……フオトダイオード（光検出器）
、２７……防塵用カバー、３０……可動部、３１
ａ……光導出入用の開口部、３３……対物レンズ
、３７，３８……防塵用カバー。 FIG. 1 is an overall perspective view of the chassis of a magneto-optical disk device equipped with a separate type optical head device showing one embodiment of this invention, as seen from the back side, FIG. 2 is a schematic sectional view of the same optical head device, and FIG. This figure is an overall perspective view of the chassis of a magneto-optical disk device equipped with a conventional separation type optical head device, seen from the back side, and FIG. 4 is a schematic sectional view of the same optical head device. 5... Disk, 5a... Signal surface, 10... Optical head device, 20... Fixed part, 21a... Opening for light introduction/extraction, 22... Laser diode (
light source), 26...photodiode (photodetector)
, 27...dustproof cover, 30...movable part, 31
a...Opening for light introduction/exit, 33...Objective lens, 37, 38...Dustproof cover.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 光源、光検出器等を有する固定部と、この固定
部に対しデイスクの径方向に移動自在に配設され
て上記光源からの光ビームをデイスクの信号面上
に集束させる対物レンズ等を有する可動部とを備
え、上記固定部側の光導出入用の開口部と、上記
可動部側の光導出入用の開口部とに、防塵用カバ
ーをそれぞれ設けたことを特徴とする光学ヘツド
装置。 A movable device having a fixed part having a light source, a photodetector, etc., and an objective lens, etc., which is movably disposed in the radial direction of the disk with respect to the fixed part and focuses the light beam from the light source onto the signal surface of the disk. 1. An optical head device comprising: a dustproof cover provided on each of the opening for light introduction/extraction on the fixed part side and the opening for light introduction/extraction on the movable part side.