JPS61102793U

JPS61102793U -

Info

Publication number: JPS61102793U
Application number: JP18952384U
Authority: JP
Priority date: 1984-12-12
Filing date: 1984-12-12
Publication date: 1986-06-30

Description

[Brief explanation of drawings]

第１図は本考案よりなる安全装置の一例を示す
回路図、第２図はシヤツター駆動回路の一例を示
す回路図、第３図は第１図のブロツク図、第４図
はシヤツター駆動装置の他の例を示す回路図であ
る。１……過電流検出回路、２……比回電圧設定回
路、３……比較回路、４……スイツチング回路。 Fig. 1 is a circuit diagram showing an example of a safety device according to the present invention, Fig. 2 is a circuit diagram showing an example of a shutter drive circuit, Fig. 3 is a block diagram of Fig. 1, and Fig. 4 is a diagram of a shutter drive device. FIG. 7 is a circuit diagram showing another example. 1... Overcurrent detection circuit, 2... Specific voltage setting circuit, 3... Comparison circuit, 4... Switching circuit.

Claims

[Scope of utility model registration request]

A detection circuit that detects overcurrent flowing through the upward and downward movement motors of a shutter, etc., a comparison circuit that compares the current value detected by the detection circuit with a preset current value, and abnormality detection in the comparison circuit. Safety of electric shutters, blinds, etc., characterized by having a switching circuit that stops the motor and rotates it in reverse and up as necessary, and a comparison current value adjustment circuit that makes it possible to vary the value of the set current value. Device.