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Monostable multivibrator-based automatic turnoff device of children bedside lamp

A multivibrator, automatic shut-off technology, used in lighting devices, lamp circuit arrangements, light sources, etc.

Pending Publication Date: 2019-05-10
山西工程技术学院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] First: The light can only be turned on by the parents, using a key switch like a car ignition switch to do this

Method used

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  • Monostable multivibrator-based automatic turnoff device of children bedside lamp
  • Monostable multivibrator-based automatic turnoff device of children bedside lamp

Examples

Experimental program
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Embodiment Construction

[0013] From a professional academic point of view, monostable flip-flops or bistable flip-flops or multivibrator are three different working forms, each of which has its own application range.

[0014] A bistable flip-flop has two stable states, which can be flipped from one stable state to the other by triggering.

[0015] The monostable flip-flop has only one stable state. By triggering, it can be flipped to a "temporary stable" state, and it will automatically return to the original stable state after a certain period of time.

[0016] The multivibrator is an unstable state, it will never be stable in a certain state, and it will always turn over and become an oscillator.

[0017] The concept of a monostable multivibrator is rare, and there is no introduction to this aspect in textbooks. It can be understood that a monostable multivibrator has a stable and an astable multifrequency oscillator. . A trigger signal is needed to drive it to an astable state, and it will retur...

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PUM

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Abstract

The invention discloses a monostable multivibrator-based automatic turnoff device of a children bedside lamp. The monostable multivibrator-based automatic turnoff device comprises a power frequency step-down transformer circuit T, a key switch circuit S1, a bridge rectifier circuit B, a 555 time-base circuit, an RC (Resistive-capacitive) network timing circuit, an immediate turnoff circuit S2, a low-voltage 12V switch circuit and a lamp bulb circuit LAMP, wherein the power frequency step-down transformer circuit T converts 220V alternating current power into 10V alternating current power; the10V alternating current power enters the bridge rectifier circuit through the key switch circuit; one part of an output of the bridge rectifier circuit is supplied to the lamp bulb circuit to lightena lamp bulb, and the other part is continuously rectified and filtered to form stable direct current power which supplies working power to the 555 time-base circuit and the RC network timing circuit;the immediate turnoff circuit is connected between the pin 4 of the 555 time-base circuit and the working ground; and a transistor T1 forms the low-voltage 12V switch circuit and is connected betweenthe lamp bulb and the working ground.

Description

technical field [0001] The present invention relates to a technology of an automatic shut-off device for children's bedside lamps, especially a research on the control technology for turning on or off children's bedside reading lamps, which is different from adult bedside reading lamps. , Convenience and safety features, the children's bedside lamp can only be turned on by an adult with a special key switch, and it can be automatically turned off after a delay according to the demand, or it can be turned off immediately. Background technique [0002] Now generally children or children have their own independent bedroom and their own exclusive bed. The bed is generally equipped with a bedside lamp for reading before going to bed. Because it is a bedside lighting tool for children, it is different in many places. Features for use by adults. [0003] Every day when parents drive their children to bed, they always have to warn a few words: "Well, you can read a book for a quart...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
CPCY02B20/40
Inventor 崔建国宁永香岳俊梅
Owner 山西工程技术学院