Motor vehicle horn long-time sounding protection method and circuit

A technology for protecting circuits and motor vehicles, applied in transducer circuits, electrical components, vehicle parts, etc., can solve the problems of burnt contacts of horns, damage to horns, and the time for each horn to sound more than 3-4 minutes, so as to achieve protection Effects of overheating damage

Active Publication Date: 2014-09-24
万喻
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the horns widely used in automobiles are mainly divided into mechanical electric horns and electronic horns. According to the standard, the sounding time of these two horns should not exceed 3-4 minutes each time, otherwise the horn contacts ...

Method used

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  • Motor vehicle horn long-time sounding protection method and circuit
  • Motor vehicle horn long-time sounding protection method and circuit
  • Motor vehicle horn long-time sounding protection method and circuit

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Embodiment Construction

[0018] An embodiment of the present invention provides a motor vehicle horn beeping protection circuit for a long time. The protection circuit includes a horn coil, and is characterized in that it also includes: a temperature detection unit for detecting the temperature of the horn coil when the motor vehicle horn is working or a temperature close to it; a control unit for detecting the temperature of the horn coil when the motor vehicle horn is working When the coil temperature increases, reduce the horn drive current.

[0019] figure 1 A protection circuit diagram for a motor vehicle horn sounding for a long time provided by the embodiment of the present invention. Such as figure 1 As shown, the protection circuit includes a horn coil and a positive temperature coefficient power thermistor PTC element.

[0020] The power thermistor PTC element with a positive temperature coefficient can be used as a detection and control unit, and is connected in series between the speake...

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PUM

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Abstract

The invention relates to a protection method and circuit, for preventing overheating damage caused by long-time sounding of a motor vehicle mechanical electric horn and a motor vehicle electronic horn. In one embodiment, the protection circuit comprises a horn coil, and is characterized by further comprising a temperature detecting unit which is used for detecting the temperature of the horn coil when a motor vehicle horn works and a similar temperature, and a control unit which reduces horn driving currents when the motor vehicle horn works and the temperature of the horn coil increases, such that the horn is prevented from damage caused by overheating, and the motor vehicle mechanical electric horn and the motor vehicle electronic horn are effectively protected.

Description

technical field [0001] The invention relates to the field of motor vehicle horns, in particular to a protection method and a circuit thereof when the motor vehicle horn is sounding for a long time. Background technique [0002] At present, the horns widely used in automobiles are mainly divided into mechanical electric horns and electronic horns. According to the standard, the sounding time of these two horns should not exceed 3-4 minutes each time, otherwise the horn contacts will be burned, or the horn electromagnet will be damaged. The horn is damaged due to the melting of the coil insulation varnish and the solenoid coil frame. However, in some special cases in actual use, the horn may sound for more than 3-4 minutes each time. For example, in Brazil and other countries, due to reasons such as weddings and funerals, users often honk the horn for a long time to show respect. Therefore, it is required that the horn can continuously sound for one hour without damage. Con...

Claims

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Application Information

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IPC IPC(8): H04R3/00B60Q5/00
Inventor 万喻
Owner 万喻
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