CN103456289A - Safety type piezoelectric buzzer - Google Patents
Safety type piezoelectric buzzer Download PDFInfo
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- CN103456289A CN103456289A CN2013103356649A CN201310335664A CN103456289A CN 103456289 A CN103456289 A CN 103456289A CN 2013103356649 A CN2013103356649 A CN 2013103356649A CN 201310335664 A CN201310335664 A CN 201310335664A CN 103456289 A CN103456289 A CN 103456289A
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Abstract
The invention discloses a safety type piezoelectric buzzer which comprises a piezoelectric capacitor, a triode, a first resistor, a second resistor and a third resistor. An M pole and a G pole of the piezoelectric capacitor are connected with voltage stabilizing tubes in parallel. The voltage stabilizing tubes which are connected with the M pole and the G pole in parallel can absorb convex waves (pulses and interference) which are accidentally generated when the buzzer works, and therefore the whole component can work in a safe state, conform to the definition of safety elements in the GB3836 standard and meet the requirement for intrinsic safety.
Description
Technical field
The present invention relates to a kind of warning device, relate in particular to a kind of safety-type piezo buzzer.
Background technology
Hummer mainly is divided into two types of piezo buzzer and electromagnetic buzzers, it is a kind of electronics information ring device of integral structure, adopt DC-voltage supply, be widely used in making microphone device in the electronic products such as computing machine, printer, duplicating machine, alarm, electronic toy, vehicle electronics, telephone set, timer.Existing hummer must be equipped with anti-explosion box body and could use, and can't install and use separately and directly.
Piezo buzzer mainly is comprised of multivibrator, piezoelectricity singing piece, impedance matching box and resonant tank, shell and light emitting diode etc.Common piezo buzzer circuit, use SH69P43 is control chip, uses the 4MHz crystal oscillator as king oscillator.It is subject to protruding ripple (pulse, the interference) impact that contingency produces when work, causes whole components and parts to have potential safety hazard.
Summary of the invention
The invention provides a kind of safety-type piezo buzzer, to meet the definition of relevant safety element in the GB3836 standard.
The technical solution used in the present invention is as follows:
A kind of hummer with protective cover, comprise piezoelectric capacitance, triode, the first resistance, the second resistance, the 3rd resistance and stabilivolt.The second resistance is parallel to base stage and the collector of triode, and the first resistance two ends are connected to base stage and the piezoelectric capacitance F utmost point of triode, and the piezoelectric capacitance M utmost point is connected with the collector of triode, and the G utmost point is connected with the emitter of triode.At the M of the piezoelectric capacitance utmost point and G utmost point shunt regulator tube D1, the 3rd resistance one end is located at the electric current electrode input end, and the other end is in parallel with the base stage of the M utmost point, the second resistance and the triode of stabilivolt negative pole, piezoelectric capacitance.
The accompanying drawing explanation
The schematic diagram that Fig. 1 is safety-type piezo buzzer circuit of the present invention.
Embodiment
As shown in Figure 1, safety-type piezo buzzer of the present invention, piezoelectric capacitance, triode Q1, the first resistance R 1, the second resistance R 2 and the 3rd resistance R 3.The second resistance R 2 is parallel to triode Q1, and the first resistance R 1 two ends are connected to base stage and the piezoelectric capacitance F utmost point of triode Q1.The piezoelectric capacitance M utmost point is connected with the collector of triode, and the G utmost point is connected with the emitter of triode.At the M of the piezoelectric capacitance utmost point and G utmost point shunt regulator tube D1, absorb hummer when work, the protruding ripple (pulse, interference) that contingency produces, the state that makes whole components and parts be in a safety is worked, meet the definition of relevant safety element in the GB3836 standard, reach the intrinsic safety requirement.
Claims (1)
1. a safety-type piezo buzzer, is characterized in that comprising piezoelectric capacitance, triode, the first resistance, the second resistance, the 3rd resistance and stabilivolt; The second resistance is parallel to base stage and the collector of triode, and the first resistance two ends are connected to base stage and the piezoelectric capacitance F utmost point of triode, and the piezoelectric capacitance M utmost point is connected with the collector of triode, and the G utmost point is connected with the emitter of triode; At the M of the piezoelectric capacitance utmost point and G utmost point shunt regulator tube D1, the 3rd resistance one end is located at the electric current electrode input end, and the other end is in parallel with the base stage of the M utmost point, the second resistance and the triode of stabilivolt negative pole, piezoelectric capacitance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103356649A CN103456289A (en) | 2013-08-05 | 2013-08-05 | Safety type piezoelectric buzzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103356649A CN103456289A (en) | 2013-08-05 | 2013-08-05 | Safety type piezoelectric buzzer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103456289A true CN103456289A (en) | 2013-12-18 |
Family
ID=49738593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103356649A Pending CN103456289A (en) | 2013-08-05 | 2013-08-05 | Safety type piezoelectric buzzer |
Country Status (1)
| Country | Link |
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| CN (1) | CN103456289A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103440980A (en) * | 2013-08-26 | 2013-12-11 | 铜陵亿亨达电子有限责任公司 | Pulse capacitor with pressure switch |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4122365A (en) * | 1976-01-26 | 1978-10-24 | Projects Unlimited, Inc. | Piezoelectric buzzer device |
| GB2084427A (en) * | 1980-08-30 | 1982-04-07 | Moore Peter | Piezoelectric Sound Generator |
| JPS63238800A (en) * | 1987-03-26 | 1988-10-04 | Nippon Chemicon Corp | Piezo-electric buzzer |
| JPH0233197A (en) * | 1988-07-22 | 1990-02-02 | Hitachi Ltd | Piezoelectric buzzer oscillation circuit |
| JP3267721B2 (en) * | 1993-01-29 | 2002-03-25 | ティーディーケイ株式会社 | Piezoelectric buzzer |
| CN1624727A (en) * | 2003-12-06 | 2005-06-08 | 西安美太信息有限公司 | Alarming device |
| CN203415225U (en) * | 2013-08-05 | 2014-01-29 | 创正防爆电器有限公司 | Safety type piezoelectric buzzer |
-
2013
- 2013-08-05 CN CN2013103356649A patent/CN103456289A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4122365A (en) * | 1976-01-26 | 1978-10-24 | Projects Unlimited, Inc. | Piezoelectric buzzer device |
| GB2084427A (en) * | 1980-08-30 | 1982-04-07 | Moore Peter | Piezoelectric Sound Generator |
| JPS63238800A (en) * | 1987-03-26 | 1988-10-04 | Nippon Chemicon Corp | Piezo-electric buzzer |
| JPH0233197A (en) * | 1988-07-22 | 1990-02-02 | Hitachi Ltd | Piezoelectric buzzer oscillation circuit |
| JP3267721B2 (en) * | 1993-01-29 | 2002-03-25 | ティーディーケイ株式会社 | Piezoelectric buzzer |
| CN1624727A (en) * | 2003-12-06 | 2005-06-08 | 西安美太信息有限公司 | Alarming device |
| CN203415225U (en) * | 2013-08-05 | 2014-01-29 | 创正防爆电器有限公司 | Safety type piezoelectric buzzer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103440980A (en) * | 2013-08-26 | 2013-12-11 | 铜陵亿亨达电子有限责任公司 | Pulse capacitor with pressure switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131218 |