Dynamic speakers with two sides

Abstract

The invention discloses a moving-coil loudspeaker sounding from both sides. The moving-coil loudspeaker is characterized by comprising a substrate and cone stands symmetrically arranged on both sides of the substrate, wherein a sounding mechanism is arranged in the cone stand on each side; the sounding mechanisms comprise cones, concentrating flux plates, driving magnets, magnetic conduction stems, voice coils and voice coil guide sleeves; the concentrating flux plates are fixed to the small-mouth ends of the cone stands; the voice coils are wound outside the voice coil guide sleeves; one end of each of the voice coil guide sleeves is fixed to one end of each of the cones; the cones are erected on the cone stands; the outer edges of the other ends of the cones are fixed to the large-mouth ends of the cone stands; one end of each of the magnetic conduction stems is fixed to the substrate; the other ends of the magnetic conduction stems are inserted into central through holes of the voice coil guide sleeves; and lubricating mechanisms are arranged between the magnetic conduction stems and the voice coil guide sleeves. According to the moving-coil loudspeaker sounding from both sides provided by the invention, the amount of heat energy produced by friction in vibration and sound production processes of the voice coils is small, so that the continuous working time of the loudspeaker is prolonged, and the service life of the loudspeaker is prolonged.

Description

technical field [0001] The invention relates to the technical field of electro-acoustic transducers, in particular to a moving-coil loudspeaker with sound from both sides. Background technique [0002] Dynamic speakers are also called dynamic speakers. Its working principle is based on Faraday's law. When a current-carrying conductor passes through a magnetic field, it will receive an electromotive force. Its direction conforms to Fleming's left-hand rule. The force, current, and magnetic field are perpendicular to each other. The magnetic flux density is directly proportional. When the voice coil is input with alternating audio current, the voice coil is subjected to an alternating driving force to produce alternating motion, which drives the paper cone to vibrate, and repeatedly pushes the air to produce sound. [0003] It can be seen that during the working process of the speaker, the voice coil is vibrating alternately, so the friction between the voice coil and the ai...

AI Technical Summary

Problems solved by technology

[0003] It can be seen that during the working process of the speaker, the voice coil is vibrating alternately, so the friction between the voice coil and the air, and the friction between the voice coil and the driving magnet will generate a certain amount of heat. If it cannot be discharged in time, the drive magnet will have a thermal demagnetization effect, which will eventually lead to a decrease in the magnetic performance of the drive magnet or complete demagnetization

Especially in high-power speakers, the amplitude and vibration frequency of the voice coil are relatively high, so the rate of heat generation is far greater than the rate of speaker heat dissipation, which limits the continuous working time of high-power speakers. However, the long-term continuous use of the above-mentioned existing high-power loudspeaker by the operator will cause the magnetic performance of the driving magnet to attenuate, thereby reducing the service life of the loudspeaker.

This is the problem that the high-power loudspeaker in the prior art is easily damaged after long-term continuous use

Images