JPS5887173U

JPS5887173U - Malfunction prevention circuit for lifting equipment

Info

Publication number: JPS5887173U
Application number: JP18295981U
Authority: JP
Inventors: 本田　實
Original assignee: 株式会社東芝
Priority date: 1981-12-10
Filing date: 1981-12-10
Publication date: 1983-06-13

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図は記録円盤再生装置の外観を示す斜視図、第２図
は再生装置内部の構造を示す斜視図、第３図乃至第５図
は第２図の装置の動作を説明するための動作説明図、第
６図は従来のモータ駆動回路′　を示すブロック図、第
７図乃至第１０図は電源立上り期間の各部の動作電圧タ
イミングチャートを示すタイムチャート図、第１１図は
本考案にかかる誤動作防止回路の回路図である。ＤＯＷＮ・・・・・・ダウン信号出力端子、ＵＰ・・・
・・・アップ信号出力端子、Ｌｌ、　Ｌ２・・・・・・
制御ライン、ＴＲ１乃至ＴＲ３・・川・トランジスタ。第２図１１９〜゛１ゝ＼ン′ ｌ第８図　　Ｖｌｌ“°″”７＋’ｉ；ｌｌｌ　マイ］ン出力第９図　　ｖｔ　ｒ　＋　１一〇鍜ｖＩ何第１１図ダウ−７０２ろ　１ッフ屑FIG. 1 is a perspective view showing the external appearance of the recording disc playback device, FIG. 2 is a perspective view showing the internal structure of the playback device, and FIGS. 3 to 5 are diagrams for explaining the operation of the device shown in FIG. 2. 6 is a block diagram showing a conventional motor drive circuit, FIGS. 7 to 10 are time charts showing operating voltage timing charts of various parts during the power supply start-up period, and FIG. 11 is a block diagram showing a conventional motor drive circuit. FIG. 3 is a circuit diagram of a malfunction prevention circuit. DOWN...Down signal output terminal, UP...
...Up signal output terminal, Ll, L2...
Control lines, TR1 to TR3... river transistors. Fig. 2 1 19~゛1 ゝ\IN' l Fig. 8 Vll "°""7+'i; ll l My]n output Fig. 9 vtr + 1 1ff scraps

Claims

[Scope of utility model registration request]

(1) Providing one or more motors capable of driving a lifting means that maintains bistable states, whereby when the lifting means is in one stable state, the control line of the motor is connected to the other stable state. 1. A malfunction prevention circuit for a lifting device, characterized in that a protection circuit is connected to prevent a signal that would cause a transition to be applied.

(2) The protection circuit includes a first transistor interposed between the first control line and ground, a pair of second and third transistors interposed between the second control line and ground, and According to claim 1 of the utility model registration claim, the utility model is characterized in that one stable state is controlled by one transistor, and the other stable state is controlled with respect to this stable state by mutual switching action of the second and third transistors. Malfunction prevention circuit for the lifting device described.