High-loudness vehicle-mounted alarm

Abstract

The invention discloses a high-loudness vehicle-mounted alarm. The high-loudness vehicle-mounted alarm consists of an alarm machine box and a high-power speaker, wherein the high-power speaker is formed to a compressive sounding head by a W-shaped basin frame, an annular magnetic conducting cavity, an annular strong permanent magnet, a W-shaped sound film, a skeleton sound ring and a W-shaped end cover; a reflective horn is mounted on the compressive sounding head; the W-shaped sound film is equivalent to one sound ring to push two sound films, so that the effective vibrating area of the sound film is enlarged; a conical structure of the W-shaped sound film is excellent in rigidity and light in weight; the sound ring of a center tap is directly matched and connected with an audio power amplifier output circuit; an improved magnetic circuit system is simple in structure, strong in magnetism and light in weight; in the audio power amplifier circuit, upper and lower field effect tubes are connected to A and B type push-pull output circuits having common drain; the negative feedback is deep; the amplifier tone quality is improved; the amplifier stability is improved; the field effect tubes are high in output current and low in loss; a vehicle power supply with low voltage of 12 V is only used for generating an electroacoustic power above 500 W; and the high-power speaker is driven to give a high-loudness alarm sound.

Description

technical field [0001] The invention relates to an alarm, in particular to a high-loud vehicle-mounted alarm. Background technique [0002] At present, the situation of anti-terrorism is still severe in the world, and our country is no exception. When the public security police are fighting violent terrorists, they must first use police cars to rush to the scene. The arrogance of the car has a certain deterrent effect, but the output power of the existing car siren is generally about 100W, which cannot meet the needs of the anti-terrorism situation. In the new car siren technology, it only adds some new technologies in terms of functions. For example, the patent No. is "201120396493.7", and the title is "a multifunctional police siren". Therefore, researching and developing a kind of vehicle-mounted siren device with more powerful deterrent power to violent terrorists is an important device that is urgently needed for public security police cars. Contents of the inven...

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Problems solved by technology

[0002] At present, the situation of anti-terrorism is still severe in the world, and our country is no exception. When the public security police are fighting violent terrorists, they must first use police cars to rush to the scene. The arrogance of the car has a certain deterrent effect, but the output power of the existing car siren is generally about 100W, which cannot meet the needs of the anti-terrorism situation. In the new car siren technology, it only adds some new technologies in terms of functions. For example, the patent number is "201120396493.7", and the patent name is "a multi-functional police siren".

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