CN202383995U - Alarm buzzer - Google Patents
Alarm buzzer Download PDFInfo
- Publication number
- CN202383995U CN202383995U CN2011204876651U CN201120487665U CN202383995U CN 202383995 U CN202383995 U CN 202383995U CN 2011204876651 U CN2011204876651 U CN 2011204876651U CN 201120487665 U CN201120487665 U CN 201120487665U CN 202383995 U CN202383995 U CN 202383995U
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- Prior art keywords
- buzzer
- crystal oscillator
- variable resistor
- triode
- resistance
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Abstract
An alarm buzzer comprises a buzzer and a control circuit, wherein the control circuit is composed of a variable resistor, a crystal vibrator, a monopole crystal vibrator, a power supply, an alarm chip and a plurality of resistors. By using the variable resistor and the crystal vibrator, the output of the circuit is relatively stable, and the resistance of the variable resistor is adjusted to change the size of volume of the buzzer; the circuit is stabilized by the crystal vibrator, the buzzer is made to vocalize at a certain frequency, a monotone beep is avoided, the buzzer sends out a rhythmic sound and the user is made to feel comfortable and the buzzer can emit a rhythmic sound, so as to make the user feel comfortable and euphonious.
Description
Technical field
The utility model relates to a kind of hummer, particularly relates to a kind of alarm buzzer.
Background technology
Pronunciation device adopts hummer mostly at present, and is as shown in Figure 1, adopts an output port just can control its sounding well; Control circuit is simple, as long as the square wave of importing about 4kHz at circuit input end just can make the hummer sounding, software is realized easily; Its shortcoming is when the signal input; Hummer can only send a kind of sound, and sound is dull, and the user is felt comfortably cool.
Summary of the invention
The utility model technical matters to be solved provides a kind of alarm buzzer, and this hummer can send rhythmical prompt tone, makes the user feel comfortable melodious.
The technical scheme that the utility model technical solution problem is adopted is: a kind of alarm buzzer; Comprise hummer and control circuit; Said control circuit is made up of variable resistor, crystal oscillator, one pole crystal oscillator, triode, power supply, alarm chip and a plurality of resistance, and said positive source links to each other with power cathode with the one pole crystal oscillator through resistance, constitutes a closed-loop path; The base stage of said triode is connected with resistance; The collector of triode is connected with variable resistor, and the emitter of triode links to each other with power cathode, and said crystal oscillator is connected between positive source and the variable resistor; Two pin positions of said alarm chip are connected in parallel on the base stage and the emitter two ends of triode, and the 3rd pin position is connected between resistance and the one pole crystal oscillator.
The beneficial effect of the utility model is: after having added variable resistor and crystal oscillator, the output of circuit is relatively stable, and can pass through to regulate variable-resistance resistance, and then changes the volume of hummer; Crystal oscillator can stabilizing circuit, and makes hummer become the sounding of certain frequency, the buzzer that avoids monotony.
Description of drawings
Fig. 1 is the synoptic diagram of existing pronunciation device.
Fig. 2 is the profile synoptic diagram of the utility model.
Fig. 3 is the synoptic diagram of the utility model control circuit.
Wherein: 1-control circuit, 2-hummer, 3-alarm chip, 4-variable resistor, 5-1-resistance, 5-2-resistance, 6-crystal oscillator, 7-one pole crystal oscillator, V0-triode.
Embodiment
In order to deepen understanding to the utility model, will combine embodiment that the utility model is done further to detail below, this embodiment only is used to explain the utility model, does not constitute the qualification to the utility model protection domain.
Like Fig. 1,2, shown in 3, the synoptic diagram of at present common pronunciation device is as shown in Figure 1, adopts its sounding of port controlling, and control circuit is simple, and input port needs only the square wave of importing about 4kHz at circuit just can make hummer 2 sounding.
The hummer profile of the utility model is cylindrical, and there are two leads the below.The utility model can be connected in the various circuit and report to the police.
Preferred embodiment below in conjunction with description of drawings the utility model: a kind of alarm buzzer; Comprise hummer 2 and control circuit 1; Control circuit is made up of variable resistor 4, crystal oscillator 6, one pole crystal oscillator 7, triode V0, power supply, alarm chip 3 and a plurality of resistance, and said positive source links to each other with power cathode with one pole crystal oscillator 7 through resistance 5-1, constitutes a closed-loop path; The base stage of said triode V0 is connected with resistance 5-2; The collector of triode V0 is connected with variable resistor 4, and the emitter of triode V0 links to each other with power cathode, and said crystal oscillator 6 is connected between positive source and the variable resistor 4; Two pin positions of said alarm chip 3 are connected in parallel on base stage and the emitter two ends of triode V0, and the 3rd pin position is connected between resistance 5-1 and the one pole crystal oscillator 7.
The rated voltage of hummer 2 is 12V, voltage range between 10 ~ 14V, rated current≤55mA, sound pressure level>=90dB.
After having added variable resistor 4 and crystal oscillator 6, the output of circuit is relatively stable, and can pass through to regulate the resistance of variable resistor 4, and then changes the volume of hummer 2; Crystal oscillator 6 can stabilizing circuit, and makes the sounding of 2 one-tenth certain frequencies of hummer, the buzzer that avoids monotony.
Claims (2)
1. alarm buzzer; It is characterized in that: comprise hummer (2) and control circuit (1); Said control circuit is made up of variable resistor (4), crystal oscillator (6), one pole crystal oscillator (7), triode (V0), power supply, alarm chip (3) and a plurality of resistance; Said positive source links to each other with power cathode with one pole crystal oscillator (7) through resistance (5-1); Constitute a closed-loop path, the base stage of said triode (V0) is connected with resistance (5-2), and the collector of triode (V0) is connected with variable resistor (4); The emitter of triode (V0) links to each other with power cathode; Said crystal oscillator (6) is connected between positive source and the variable resistor (4), and two pin positions of said alarm chip (3) are connected in parallel on the base stage and the emitter two ends of triode (V0), and the 3rd pin position is connected between resistance (5-1) and the one pole crystal oscillator (7).
2. alarm buzzer as claimed in claim 1 is characterized in that: the rated voltage of said hummer (2) is 12V, voltage range between 10 ~ 14V, rated current≤55mA, sound pressure level>=90dB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204876651U CN202383995U (en) | 2011-11-30 | 2011-11-30 | Alarm buzzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204876651U CN202383995U (en) | 2011-11-30 | 2011-11-30 | Alarm buzzer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202383995U true CN202383995U (en) | 2012-08-15 |
Family
ID=46632482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204876651U Expired - Fee Related CN202383995U (en) | 2011-11-30 | 2011-11-30 | Alarm buzzer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202383995U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106773620A (en) * | 2016-11-23 | 2017-05-31 | 北海高创电子信息孵化器有限公司 | A kind of electronic watch of adjusting sound volume |
-
2011
- 2011-11-30 CN CN2011204876651U patent/CN202383995U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106773620A (en) * | 2016-11-23 | 2017-05-31 | 北海高创电子信息孵化器有限公司 | A kind of electronic watch of adjusting sound volume |
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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: 20120815 Termination date: 20131130 |