Inner-outer-pressure balanced waterproof car electric horn

Abstract

The invention relates to an inner-outer-pressure balanced waterproof car electric horn. The electric horn comprises a horn rear cover assembly, a coil assembly, a connector assembly and a contact plate assembly, wherein the horn rear cover assembly comprises a rear cover shell, an iron core, a pressure balance hole and a plugging hole, the pressure balance hole and the plugging hole are arranged on a soleplate of the rear cover shell, the coil assembly is sleeved on the iron core in the middle of the horn rear cover assembly, the connector assembly is installed on the soleplate of the horn rear cover assembly, the contact plate assembly is arranged above the coil assembly and fixed on the rear cover shell of the horn rear cover assembly, the inner side surface of the pressure balance hole is provided with a waterproof breathing film, so that not only can the balance of the pressure inside and outside the horn be solved, but also the waterproof problem of the horn can be solved, the damage of water on the internal circuit can be avoided, the service life of the entire horn is longer, and the reliability is higher.

Description

Technical field: [0001] The invention relates to an automobile horn, in particular to an automobile waterproof electric horn. Background technique: [0002] The car electric horn makes sound by the vibration of the metal diaphragm. The car electric horn is composed of a horn back cover assembly, a coil assembly, a plug seat assembly, a contact piece assembly and a vibrating piece assembly. When the driver presses the horn switch, the current passes through the contact assembly through the coil in the coil assembly, and the coil generates magnetic force to attract the armature of the vibrating plate assembly, forcing the sounding piece of the vibrating plate assembly to move, and the armature moves to disconnect the contact and interrupt the current. , the magnetic force of the coil disappears, the sounding piece returns to its original position with the armature under the action of its own elasticity and the vibrating piece, the contact closure circuit is connected again, t...

AI Technical Summary

Problems solved by technology

Opening a pressure balance hole in the back cover of the speaker solves the problem of air pressure balance inside and outside the speaker, but affects the waterproof performance of the speaker. Water ingress will cause the circuit board inside the horn to be short-circuited and burned, and the exposed parts of the car with the horn, when the car is driving on a rainy day or on a road with accumulated water, the rain will splash on the horn, and the rain will flow into the back of the horn In the cover, it is easy to cause the circuit board inside the speaker to be short-circuited and burned

Images