JPS5824090U

JPS5824090U - optical detection device

Info

Publication number: JPS5824090U
Application number: JP11866681U
Authority: JP
Inventors: 廉高橋
Original assignee: ソニー株式会社
Priority date: 1981-08-10
Filing date: 1981-08-10
Publication date: 1983-02-15
Also published as: JPS643091Y2

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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来の光学式検出装置の正面図、第２図〜第７
図は本考案の第１の実施例を示すものであって、第２図
はディスクカセット及び記録再生装置を示す斜視図、第
３図はディスクカセットの裏面図、第４図は第２図にお
けるＩＶ−ＩＶ線矢視親図第５図は記録再生装置にディ
スクカセットを装着した場合における誤消去防止°板と
検出部材との関連動作を示す要部拡大断面図、第６図は
発光素子と受光素子との間に前記遮光部が挿入された状
態を示す光学式検出装置の正面図、第７図は検出部材の
検出部が誤消去防止板に係合しない状態を示す第５図と
同様の要部拡大断面図、第８図は本考案の第２の実施例
を示す光学式検出装置の正面図、第９図は本考案の第３
の実施例を示す光学式検出装置の正面図、第１０図は回
転円板の回転速度を検出する光学的検出装置に本考案を
適用した例を概略的に示す斜視図である。なお図面に用いられている符号において、２・・・・・
・支持基体、２ａ、　　２ｂ・・・・・・対向部、２ｃ
・・・・・・連結部、３・・・・・・発光素子、４・・
・・・・受光素子、８・曲・内側面、１１・・・・・・
光学式検出装置、３６・・・・・・誤消去防止板検出部
材、４１・・・・・・遮光手段としての遮光部、４３．
４４・・・・・・反射防止部材、４７・・・・・・回転
円板、４８・・・・・・遮光手段としての歯である。２ｃ　　　　　　　　　　− 第６図２ＣＩ　　　　　　　　　Ｉｊ −第７図　　　　−Figure 1 is a front view of a conventional optical detection device, Figures 2 to 7
The drawings show the first embodiment of the present invention, in which Fig. 2 is a perspective view showing a disc cassette and a recording/reproducing device, Fig. 3 is a rear view of the disc cassette, and Fig. 4 is the same as that shown in Fig. 2. Figure 5 is an enlarged sectional view of the main parts showing the related operation of the accidental erasure prevention plate and the detection member when a disk cassette is installed in the recording/reproducing device, and Figure 6 is a diagram showing the light emitting element and FIG. 7 is a front view of the optical detection device showing a state in which the light shielding part is inserted between the light receiving element and the light receiving element, and FIG. 7 is the same as FIG. FIG. 8 is a front view of the optical detection device showing the second embodiment of the present invention, and FIG. 9 is the third embodiment of the present invention.
FIG. 10 is a front view of an optical detection device showing an embodiment of the present invention, and FIG. 10 is a perspective view schematically showing an example in which the present invention is applied to an optical detection device for detecting the rotational speed of a rotating disk. In addition, in the symbols used in the drawings, 2...
・Support base, 2a, 2b... Opposing part, 2c
...Connecting portion, 3...Light emitting element, 4...
・・・・Light receiving element, 8・curved・inner surface, 11・・・・
Optical detection device, 36... Erroneous erasure prevention plate detection member, 41... Light shielding section as light shielding means, 43.
44... Anti-reflection member, 47... Rotating disc, 48... Teeth serving as light shielding means. 2c - Figure 6 2CI Ij - Figure 7 -

Claims

[Scope of utility model registration request]

A light-emitting element and a light-receiving element are mounted facing each other on a pair of opposing parts of a support base forming a hollow shape, and whether the optical path formed between these elements is blocked by a light shielding means or not. In the optical detection device that detects the movement state of the light shielding means, by providing an anti-reflection portion at a connecting portion that connects the pair of opposing portions to each other at one end, the light emitting element can be detected. An optical detection device characterized in that the light is reflected by the connecting portion and this reflected light is prevented from entering the light receiving element.