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Alarm buzzer

A buzzer and alarm bee technology, applied to sirens, musical instruments, instruments, etc., can solve the problems of monotonous sound and inability for users to feel comfortable, and achieve the effect of stable output and avoiding buzzing

Inactive Publication Date: 2012-04-18
XINGHUA HUAXING MACHINERY & ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Most of the current pronunciation devices use buzzers, such as figure 1 As shown, the sound can be well controlled by using one output port. The control circuit is simple. Just input a square wave of about 4kHz at the input end of the circuit to make the buzzer sound. The software is easy to implement. The disadvantage is that when the signal is input, The buzzer can only emit one sound, which is monotonous and boring, and does not make the user feel comfortable

Method used

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Embodiment Construction

[0010] In order to deepen the understanding of the present invention, the present invention will be further described below in conjunction with examples, which are only used to explain the present invention and do not constitute a limitation to the protection scope of the present invention.

[0011] Such as figure 1 , 2 , 3, the schematic diagram of the current common pronunciation device is as follows figure 1 As shown, a port is used to control its sounding, and the control circuit is simple. As long as a square wave of about 4kHz is input into the circuit at the input port, the buzzer 2 can make a sound.

[0012] The shape of the buzzer of the present invention is cylindrical, and there are two wires at the bottom. The present invention can be connected in various circuits for alarming.

[0013] A preferred embodiment of the present invention is illustrated below in conjunction with accompanying drawings: a kind of warning buzzer, comprises buzzer 2 and control circuit 1...

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PUM

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Abstract

An alarm buzzer comprises a buzzer and a control circuit, wherein the control circuit comprises a variable resistance, a crystal oscillator, a monopolar crystal oscillator, a triode, a power source, an alarm chip and a plurality of resistance; after the variable resistance and the crystal oscillator are added in the control circuit, the circuit output is relatively stable; the volume size of the buzzer can be changed by adjusting the resistivity of the variable resistance; the crystal oscillator can stabilize the circuit and enables the buzzer to produce sound at a certain frequency, thereby monotonous buzzing is avoided; and the buzzer can give out rhythmical warning tone so that users feel comfortable and sweet-sounding.

Description

technical field [0001] The invention relates to a buzzer, in particular to an alarm buzzer. Background technique [0002] Most of the current pronunciation devices use buzzers, such as figure 1 As shown, the sound can be well controlled by using one output port. The control circuit is simple. Just input a square wave of about 4kHz at the input end of the circuit to make the buzzer sound. The software is easy to implement. The disadvantage is that when the signal is input, Buzzer can only send out a kind of sound, and sound is monotonous and boring, can't make the user feel comfortable. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an alarm buzzer, which can emit rhythmic prompting sounds to make users feel comfortable and pleasing to the ear. [0004] The technical solution adopted by the present invention to solve the technical problem is: an alarm buzzer, including a buzzer and a control circuit, the contro...

Claims

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Application Information

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IPC IPC(8): G10K9/12G10K7/00
Inventor 黄骐
Owner XINGHUA HUAXING MACHINERY & ELECTRONICS
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