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Sound volume regulator for buzzer

A volume adjustment and buzzer technology, applied in washing devices, manual tone/bandwidth control, instruments, etc., can solve the problems of high cost and time, consumption, inability to adjust the volume of the buzzer 2, etc., to simplify the circuit, reduce Effects of cost and time

Inactive Publication Date: 2005-10-19
LG ELECTRONICS (TIANJIN) APPLIANCES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the driving circuit of this prior art buzzer can make the buzzer 2 gradually reduce the volume with a soft sound through the capacitor C1 of the power supply part 10, the volume of the buzzer 2 cannot be adjusted.
If you want to adjust the volume of the buzzer 2, you must set up other circuits, so it will consume more cost and time.

Method used

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  • Sound volume regulator for buzzer
  • Sound volume regulator for buzzer
  • Sound volume regulator for buzzer

Examples

Experimental program
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Embodiment Construction

[0013] Such as Figure 4 As shown, the buzzer volume adjustment device provided by the present invention is composed of a power supply part 30 , a transformer part 40 and a control part 50 . Wherein, the power supply part 30 can provide the power of the driving power supply 8 to the buzzer 6; the transformer part 40 is connected on the driving power supply 8, and it can transform the power provided by the power supply part 30, and then provide it to the buzzer. 6, to adjust the volume of the buzzer 6; the control unit 50 has a transistor Q6, the transistor Q6 is connected to the buzzer 6, and it can perform on / off action under the pulse signal with a set period to make the buzzer The device 6 is driven according to a certain frequency. The transformer unit 40 is composed of a first transistor Q4, a second transistor Q5 and a plurality of resistors R10-R13. When the buzzer 6 connected to the resistor R16 is driven at both ends B and B', the drive signal terminal P1' can outpu...

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PUM

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Abstract

This invention discloses a volume adjusting device for a buzzer including a power supply part providing power of the drive power supply to the buzzer, a transforming part deciding if it provides drive power supply to the buzzer and transforms voltage to it, a switch connected on the buzzer and controlling it in terms of pulse signals having a certain period and a control part driving the buzzer in light of a frequency.

Description

technical field [0001] The present invention relates to a volume adjustment device for a buzzer, in particular to a buzzer that can notify the user of the working status of the washing machine and whether a fault occurs by adjusting the volume without setting up other circuits. Volume adjustment device. Background technique [0002] Generally speaking, a washing machine is a device that uses water and washing powder supplied to the drum to go through processes such as washing, rinsing, and dehydration to remove pollutants attached to clothes and bedding. In such a washing machine, a plurality of buzzers are provided in order to allow the user to easily determine the working state of the washing machine and whether there is a failure. figure 1 It is a circuit diagram of a buzzer drive in the prior art. figure 2 for figure 1 The output signal waveform diagram of the drive signal terminal and the pulse signal terminal. image 3 for figure 1 Capacitor charging and discharg...

Claims

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Application Information

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IPC IPC(8): D06F37/42G10K9/12H03G5/10
Inventor 孙权
Owner LG ELECTRONICS (TIANJIN) APPLIANCES CO LTD