Waterproof vehicle audio alarm device having self protection circuit

Abstract

The invention belongs to the vehicle alarm device technology field and particularly relates to a waterproof vehicle audio alarm device having a self protection circuit. The waterproof vehicle audio alarm device comprises a high voltage protection circuit, an intermittent tone generation circuit, a power amplification and output current circuit and a loudspeaker, wherein an upper wall of a sound film of the loudspeaker is provided with a waterproof ventilation film, the loudspeaker is connected with a positive electrode end of the high voltage protection circuit, the other end of the loudspeaker is connected with the power amplification and output current circuit, the power amplification and output current circuit is connected with the intermittent tone generation circuit, the high voltage protection circuit comprises an electric signal anti-interference network module, an emitter follower module and a protection circuit module which are sequentially connected in series and further comprises a power source anti-interference network module connected with the emitter follower module, the power source anti-interference network module is connected with the intermittent tone generation circuit, the protection circuit module and the loudspeaker, and the electric signal anti-interference network module is further provided with a protection diode. The waterproof vehicle audio alarm device has the high voltage protection function and further has properties of good waterproof performance and long service life.

Description

technical field [0001] The invention belongs to the technical field of vehicle alarm devices, and in particular relates to a waterproof vehicle audio alarm device with a self-protection circuit. Background technique [0002] Today, with the rapid development of world science and technology, the number of motor vehicles is increasing and the number of vehicles used in various road conditions is increasing. The number of motor vehicles used in various fields is increasing, such as mining vehicles, off-road vehicles, etc. With continuous improvement, vehicle safety issues are particularly important, so the design of alarm devices for vehicle safety is also very important. At present, the alarm devices used for vehicles are divided into reversing alarms, voice alarms, etc., with diverse shapes. Alarm, light alarm and sound-light integrated alarm device, the function has developed from a single tone to an intelligent variable tone, but if the vehicle is operating in an extremely ...

AI Technical Summary

Problems solved by technology

[0002] Today, with the rapid development of world science and technology, the number of motor vehicles is increasing and the number of vehicles used in various road conditions is increasing. The number of motor vehicles used in various fields is increasing, such as mining vehicles, off-road vehicles, etc. With continuous improvement, vehicle safety issues are particularly important, so the design of alarm devices for vehicle safety is also very important. At present, the alarm devices used for vehicles are divided into reversing alarms, voice alarms, etc., with diverse shapes. Alarm, light alarm and sound-light integrated alarm device, the function has developed from a single tone to an intelligent variable tone, but if the vehicle is operating in an extremely harsh environment, especially in the Antarctic or Arctic and extremely humid environment , often the working life of the alarm device will be shortened for a long time, and the sound will be reduced. When operating in an extremely humid environment, water vapor will easily penetrate into the speaker, causing the alarm device to reduce the sound or work abnormally.

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