JPS5881740U

JPS5881740U - Optical tape end detection device

Info

Publication number: JPS5881740U
Application number: JP17517181U
Authority: JP
Inventors: 森長　薫; 古藤田　喜弘; 清二冨田
Original assignee: 株式会社東芝
Priority date: 1981-11-25
Filing date: 1981-11-25
Publication date: 1983-06-02
Also published as: JPH042421Y2

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 drawings]

第１図は従来の光学式テープ端検出装置の一例を示す構
成説明図、第２図及び第３図は夫々この考案の適用され
たカセットテープレコーダを示ス正面側斜視図及び裏面
側斜視図、第４図は同カセットテープレコーダにおける
テープ走行の正逆切換機構を示す構成図、第５図及び第
６図は夫々同正逆切換機構の動作説明図、第７図ａ“及
びｂは夫々考案に適用されたカセットテープレコーダに
おけるヘッド回転機構を示す外観図及び動作説明図、第
８図はこの考案の一実施例を示す外観図、第９図ａ及び
ｂは夫々同じく動作を示す説明図、第１０図は光センサ
部とテープとの位置係を示す構成説明図、第１１図ａ及
びｂは左ガイド台の構成を示す断面図及び平面図である
。１１・・・メインシャーシ、１２・・・操作部、１３・
・・ヘッドスライダ、１４・・・録再ヘッド、１５．１
６・・・ピンチローラ、１７．１８・・・キャプスタン
、１９・・・左リール台、２０・・・右リール台、２１
・・・テープカウンタ、２２・・・モータ、２３．２４
・・・操作レバー、２５・・・左再生スライダ、２６・
・・右再生スライダ、２７・：・リバース駆動レバー、
２Ｂ・・・歯車、２９・・・ロックレバ−１３０・・・
制御スライダ、３１・・・駆動スライダ、３２・・・消
去ヘッド、３３・・・ヘッド支持体、３４・・・ヘッド
取付構体、３５・・・ヘッド台板、３６・・・歯車、３
７・・・扇状歯車、３８・・・テープ、３９・・・接続
線、４０・・・矢印、４１・・・トーションスプリング
、４２・・・左ガイド台、４３・・・右ガイド台、４４
．４５・・・係合ピン、４６・・・左ガイド部材、４７
・・・右ガイド部材、４８．４９・・・回動軸、５０・
・・折曲係合部、５１・・・折曲係合部、５２゜５３・
・・ばね、５４，５５・・・ピンチレバー、５６゜５７
・・・回動軸、５８・・・光センサ、５９・・・フォト
カプラ、６０・・・発光素子、６１・・・受信素子、６
２・・・印刷配線基板、６３・・・レンズ部、６４・・
・突出レンズ部、６５・・・磁気テープ部分、６６・・
・スプライシングテープ部分、６７・・・リーダーテー
プ部分。FIG. 1 is a configuration explanatory diagram showing an example of a conventional optical tape end detection device, and FIGS. 2 and 3 show a front perspective view and a back perspective view, respectively, of a cassette tape recorder to which this invention is applied. , FIG. 4 is a configuration diagram showing a forward/reverse switching mechanism for tape running in the cassette tape recorder, FIGS. 5 and 6 are explanatory diagrams of the operation of the forward/reverse switching mechanism, respectively, and FIGS. Fig. 8 is an external view showing an embodiment of the invention, and Fig. 9 a and b are explanatory drawings showing the same operation. , FIG. 10 is a configuration explanatory diagram showing the positional relationship between the optical sensor section and the tape, and FIGS. 11a and 11b are a sectional view and a plan view showing the configuration of the left guide stand. 11... Main chassis, 12 ...Operation unit, 13.
...Head slider, 14...Recording/playback head, 15.1
6...Pinch roller, 17.18...Capstan, 19...Left reel stand, 20...Right reel stand, 21
...Tape counter, 22...Motor, 23.24
...Operation lever, 25...Left playback slider, 26.
・Right playback slider, 27:・Reverse drive lever,
2B...Gear, 29...Lock lever-130...
Control slider, 31... Drive slider, 32... Erasing head, 33... Head support, 34... Head mounting structure, 35... Head base plate, 36... Gear, 3
7... Fan-shaped gear, 38... Tape, 39... Connection line, 40... Arrow, 41... Torsion spring, 42... Left guide stand, 43... Right guide stand, 44
．． 45... Engagement pin, 46... Left guide member, 47
... Right guide member, 48.49 ... Rotation shaft, 50.
...Bending engagement part, 51...Bending engagement part, 52°53.
... Spring, 54, 55 ... Pinch lever, 56°57
... Rotation axis, 58 ... Optical sensor, 59 ... Photocoupler, 60 ... Light emitting element, 61 ... Receiving element, 6
2... Printed wiring board, 63... Lens section, 64...
・Protruding lens part, 65...Magnetic tape part, 66...
・Splicing tape part, 67...Leader tape part.

Claims

[Scope of utility model registration request]

An optical tape end detection device that includes a light emitting element that irradiates light onto the tape and a light receiving element that receives reflected light of the light, and detects the end of the tape based on a change in the light reflectance of the tape, An optical system is interposed between the tape and the light emitting element to make the irradiation range of light irradiated from the light emitting element to the tape narrow in the width direction of the tape and wide in the longitudinal direction. An optical tape edge detection device characterized by: