CN201477872U - buzzer - Google Patents
buzzer Download PDFInfo
- Publication number
- CN201477872U CN201477872U CN2009201691069U CN200920169106U CN201477872U CN 201477872 U CN201477872 U CN 201477872U CN 2009201691069 U CN2009201691069 U CN 2009201691069U CN 200920169106 U CN200920169106 U CN 200920169106U CN 201477872 U CN201477872 U CN 201477872U
- Authority
- CN
- China
- Prior art keywords
- triode
- oscillator plate
- power supply
- resonator
- buzzer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Abstract
The utility model relates to a buzzer which is composed of a shell, a core, an oscillator plate, a resonance cavity and a sound leakage hole; the buzzer is characterized in that: the resonance cavity is a circular arc shape, large sound leakage holes are respectively arranged at the upper and lower parts of the resonance cavity; the circuit is a no-rectification no voltage reduction circuit which is composed of two resistances R1 and R2, a triode BG and an oscillator plate, wherein the collector electrode of the triode BG is connected with the anode of the power supply by the R1, the base electrode is connected with the cathode of the power supply by the R2, the base electrode is connected with the cathode of the power supply, one end of the oscillator plate is connected with the base electrode of the triode, and the other end is connected with the anode of the power supply; the buzzer has simple structure, concentrated sound waves, strong resonance and loud and clear sound.
Description
Technical field
The utility model relates to a kind of hummer, is a kind of hummer that rectification does not have reduction voltage circuit that do not have specifically.
Background material
At present, generally the hummer shell of Shi Yonging is square, and resonator is a right-angle structure, lets out sound hole and is made up of a plurality of little controls, and circuit wherein is the rectification reduction voltage circuit.The right angle resonator of this kind hummer makes sound scattering, and resonance effect is not good, and pronunciation is dull; A plurality of apertures are let out sound and are unfavorable for that sound wave releases; The circuit structure complexity, easy break-down is difficult to safeguard, simultaneously, the production cost height.
Summary of the invention
The purpose of this utility model is the deficiency that solves said structure, and a kind of simple in structure, sound wave is concentrated, pronunciation is loud and clear, cost is low, no rectification does not have reduction voltage circuit hummer is provided.
The technical solution of the utility model is achieved in that a kind of hummer, by shell, movement, oscillator plate, resonator with let out sound hole and form, changes existing right angle resonator into circular arc, and the resonator top and the bottom respectively have a macropore to let out sound hole to replace many apertures to let out sound; Circuit does not have reduction voltage circuit for no rectification, is made up of two resistance R 1, R2 and triode BG, oscillator plate, and wherein the collector of triode BG connects positive source through R1, base stage connects power cathode through R2, base stage connects power cathode, oscillator plate one termination transistor base, another termination positive source.This apparatus structure is simple, and sound wave is concentrated, and sympathetic response is strong, and it is loud and clear to pronounce.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is a circuit diagram of the present utility model.
Embodiment
With reference to Fig. 1, Fig. 2, this novel hummer is by shell 1, movement 2, oscillator plate 3, resonator 4 and let out sound hole 5 and form, and resonator 4 is a circular arc, and resonator 4 top and the bottom respectively have a macropore to let out sound hole 5; Circuit does not have reduction voltage circuit for no rectification, is made up of two resistance R 1, R2 and triode BG, oscillator plate 3, and wherein the collector of triode BG connects positive source through R1, base stage connects power cathode through R2, base stage connects power cathode, oscillator plate 3 one termination transistor bases, another termination positive source.
The power supply of this hummer is the 220V alternating current, and when voltage input movement 2, a-c cycle amplifies through triode, impels oscillator plate 3 that slight vibration takes place, and sends resonant voice by arc resonator 4.
This device can be widely used in prompting and the warning before and after machinery, the electric equipment products shutdown.
Claims (1)
1. hummer by shell, movement, oscillator plate, resonator with let out sound hole and form, is characterized in that resonator is a circular arc, and the resonator top and the bottom respectively have a macropore to let out sound hole; Circuit does not have reduction voltage circuit for no rectification, is made up of two resistance R 1, R2 and triode BG, oscillator plate, and wherein the collector of triode BG connects positive source through R1, base stage connects power cathode through R2, base stage connects power cathode, oscillator plate one termination transistor base, another termination positive source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201691069U CN201477872U (en) | 2009-08-17 | 2009-08-17 | buzzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201691069U CN201477872U (en) | 2009-08-17 | 2009-08-17 | buzzer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201477872U true CN201477872U (en) | 2010-05-19 |
Family
ID=42414128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201691069U Expired - Fee Related CN201477872U (en) | 2009-08-17 | 2009-08-17 | buzzer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201477872U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102761812A (en) * | 2012-08-06 | 2012-10-31 | 东莞思威特电子有限公司 | Piezoelectric squealer structure for improving sound pressure value |
| CN103200495A (en) * | 2012-01-04 | 2013-07-10 | 苏州恒听电子有限公司 | Air pressure balancing and low pitch enhancing outer shell device used for minitype loudspeaker device |
| CN104505076A (en) * | 2014-11-28 | 2015-04-08 | 常州超音电子有限公司 | Patch type buzzer |
| CN104505074A (en) * | 2014-11-28 | 2015-04-08 | 欧朗科技（苏州）有限公司 | Anti-lost device curved-surface sound cavity structure matched with buzzer |
-
2009
- 2009-08-17 CN CN2009201691069U patent/CN201477872U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103200495A (en) * | 2012-01-04 | 2013-07-10 | 苏州恒听电子有限公司 | Air pressure balancing and low pitch enhancing outer shell device used for minitype loudspeaker device |
| CN102761812A (en) * | 2012-08-06 | 2012-10-31 | 东莞思威特电子有限公司 | Piezoelectric squealer structure for improving sound pressure value |
| CN104505076A (en) * | 2014-11-28 | 2015-04-08 | 常州超音电子有限公司 | Patch type buzzer |
| CN104505074A (en) * | 2014-11-28 | 2015-04-08 | 欧朗科技（苏州）有限公司 | Anti-lost device curved-surface sound cavity structure matched with buzzer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100519 Termination date: 20100817 |