CN2157665Y - Portable electronic ultrasonic mosquito-killing device - Google Patents
Portable electronic ultrasonic mosquito-killing device Download PDFInfo
- Publication number
- CN2157665Y CN2157665Y CN 93215666 CN93215666U CN2157665Y CN 2157665 Y CN2157665 Y CN 2157665Y CN 93215666 CN93215666 CN 93215666 CN 93215666 U CN93215666 U CN 93215666U CN 2157665 Y CN2157665 Y CN 2157665Y
- Authority
- CN
- China
- Prior art keywords
- positive
- triode
- utmost point
- npn
- loudspeaker
- 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
Links
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- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Abstract
The utility model relates to a mosquito repelling device belonging to a domestic product and is composed of a power supply, a three pole pipe, a capacitance and a loud speaker. The positive pole of the power supply is connected with a direction turning switch and then is connected with the positive pole of the NPN three pole pipe through an R< b 1 > and an R< b 2 >. Then the positive pole of the power supply through the capacitance C is connected with an oscillating device. The mosquito repelling device has the advantages of simple structure, selectable switch, stable frequency, low dissipation of energy and no effect on human bodies.
Description
The utility model belongs to a kind of product for civilian use, is a kind of mosquito expelling equipment.
At present, common ultrasonic mosquito expelling equipment complex structure, frequency instability, and high frequency sound occurs the people is formed stimulation.
The purpose of this utility model is to overcome the deficiency of above-mentioned known technology, thereby provides a kind of simple in structure, frequency stabilization and the portable electronic ultrasonic mosquito expelling equipment with two retaining functions.
The purpose of this utility model realizes in the following way:
The utility model is to be made of power supply, two triode NPN types and positive-negative-positive electric capacity and loudspeaker, wherein: the positive plate one tunnel of power supply switches through to switch, pole changer also meets two resistance R b1 with Rb2, be connected the P utmost point (base stage) of NPN type triode again, this P utmost point also connects the P utmost point and the loudspeaker of positive-negative-positive triode by capacitor C, and the loudspeaker other end and NPN emitter stage connect power cathode after joining; Another road of positive source connects the P utmost point of positive-negative-positive triode by resistance R e.
Principle of the present utility model is as follows:
Formed complementary oscillator by NPN and PNP triode in the circuit, can produce a stable oscillation stationary vibration frequency, wherein C is a feedback capacity, and Rb1 and Rb2 are the bias resistance of NPN triode, and the NPN triode is an oscillator, through the PNP triode that polarity of voltage is reverse, by feedback capacity C, electricity consumption positive pressure feedback form is added to the base stage of oscillating tube again, forms vibration, select feedback capacity and bias resistance Rb1 and Rb2 can change frequency of oscillation, its outputting oscillation signal acts on and produces the electroacoustic wave of oscillation on the loudspeaker.
The utility model compared with prior art has following advantage:
Circuit structure is simple, and switch can be selected, frequency stabilization, and power consumption is few, and the people is not had influence.
Below in conjunction with accompanying drawing the utility model is further described:
Fig. 1 is the utility model circuit diagram, also is embodiment of the utility model
In Fig. 1: NPN can adopt 9013 types, and PNP can adopt 9012 types, and electric capacity is 0.10 μ F, and loudspeaker adopts tweeter, and Re is 60 Ω, and power supply is direct current 3V, and Rb1 is 5.2K Ω, and Rb2 is 3K Ω.
Claims (1)
1, a kind of portable electronic ultrasonic mosquito expelling equipment, constitute by power supply, two triode NPN types and positive-negative-positive, electric capacity and loudspeaker, it is characterized in that: positive source one tunnel switches through to switch, pole changer also meets two resistance R b1 and Rb2, connect the NPN type triode P utmost point (base stage) again, this P utmost point is by the P utmost point and the loudspeaker of capacitor C connection positive-negative-positive triode, and the loudspeaker other end and NPN emitter stage connect power cathode after joining; Another road of positive source connects the P utmost point of positive-negative-positive triode by resistance R e.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93215666 CN2157665Y (en) | 1993-06-11 | 1993-06-11 | Portable electronic ultrasonic mosquito-killing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93215666 CN2157665Y (en) | 1993-06-11 | 1993-06-11 | Portable electronic ultrasonic mosquito-killing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2157665Y true CN2157665Y (en) | 1994-03-02 |
Family
ID=33796082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93215666 Expired - Fee Related CN2157665Y (en) | 1993-06-11 | 1993-06-11 | Portable electronic ultrasonic mosquito-killing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2157665Y (en) |
-
1993
- 1993-06-11 CN CN 93215666 patent/CN2157665Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |