Loudspeaker

Abstract

The invention relates to a loudspeaker, which comprises cylindrical iron, annular iron, a coil base cylinder and a vibrating diaphragm, wherein at least one of the cylindrical iron and the annular iron is a permanent magnet; the annular iron is arranged outside the cylindrical iron in a sleeved mode, so as to form an annular cavity between the annular iron and the cylindrical iron; the top end ofthe coil base cylinder is connected with the vibrating diaphragm; the lower portion of the coil base cylinder is inserted into the annular cavity; a coil winding is arranged on the coil base cylinder,and signal lines are led out of the two ends of the coil winding; and a plurality of convex edges are arranged on the outer peripheral surface of the cylindrical iron and / or the inner peripheral surface of the annular iron at intervals. The method has the advantages of being simple in structure, convenient to implement, low in linear distortion and high in conversion efficiency.

Description

technical field [0001] The invention relates to a loudspeaker. Background technique [0002] The speaker is an electro-acoustic conversion product. For a dynamic speaker, its working principle is: the coil (voice coil) of the speaker is connected to an AC audio current, and an alternating magnetic field is generated around the coil. Since the coil is located in the speaker's own In the magnetic field of the permanent magnet, therefore, the two magnetic fields generate an interaction force, causing the coil to vibrate with the amplitude of the audio current. In the speaker, the coil and the diaphragm are integrated, and the diaphragm follows the vibration of the coil to produce sound, thereby completing the electrical signal to the machine. Vibration conversion. [0003] It can be seen that the electro-acoustic conversion involves the principle of electromagnetic induction, which uses the interaction relationship between the induced magnetic field and the permanent magnetic ...

AI Technical Summary

Problems solved by technology

However, the traditional electroacoustic conversion mechanism has the problems of linear distortion and low conversion efficiency in specific operation.

Taking the moving coil speaker as an example, the coil runs up and down the cylindrical magnet and / or ring iron. As we all know, the magnetic field strength at the end of the magnet is the largest. In order to effectively use the magnetic force of the magnet, the coil and the coil base are arranged near the top of the magnet. At the position of the upper part, it is often necessary to additionally install a magnetically conductive plate at the top. However, the magnetic force of the permanent magnet is still not fully utilized. At the same time, this structure cannot fully couple the induced magnetic field generated in the coil with the permanent magnetic field generated by the magnet. , resulting in problems of linear distortion and low conversion efficiency

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