Planar diaphragm speaker with driving unit

Abstract

The invention provides a planar diaphragm speaker with a driving unit. The planar diaphragm speaker comprises an iron frame of the speaker, a magnet, a magnetic conduction sheet and a voice coil, wherein the magnet and the magnetic conduction sheet are arranged in the iron frame; the voice coil is arranged between the iron frame and the magnet; one end of the voice coil is adhered to a step, in the middle of a cavity of the iron frame, of a butterfly vibration sheet; a front cavity of the speaker is formed at an opening of the iron frame in front of the butterfly vibration sheet; a planar diaphragm is arranged in a protruded spigot of a port of the front cavity to form a front chamber of the speaker; and air vent holes which are uniformly distributed are formed in an annular bottom surface of the front cavity. A moving coil loudspeaker which is formed by using the magnet and the magnetic conduction sheet in the iron frame and the voice coil serves as the driving unit; an audio current passes through the voice coil to generate an alternating magnetic field; the alternating magnetic field and a fixed magnetic field of the magnet attract each other and repel each other to form an air flow which pushes a vibration diaphragm to vibrate; and the front chamber uniformly pushes the planar diaphragm to vibrate so as to make a sound of the speaker. The planar diaphragm speaker with the driving unit has uniform and good transient response, lower distortion rate and excellent tone.

Description

technical field [0001] The invention belongs to the technical field of electronic products and relates to an earphone speaker, in particular to a planar diaphragm speaker with a driving unit. Background technique [0002] Generally, the diaphragm of a moving coil speaker is arc-shaped. In order to enhance its rigidity, there will be stripes on the surface, and the center part of the speaker diaphragm pushes the vibration of the entire diaphragm. Since the vibration amplitude of each point on the diaphragm is different, Transient response and distortion rate are difficult to control well. However, it has been widely used because of its simple structure, low manufacturing difficulty and low cost. The diaphragm of the flat film speaker is light in weight, has uniform vibration, good transient response and low distortion rate. However, due to the structural characteristics of the current planar diaphragm speaker, the vibration of the planar diaphragm speaker is driven by the c...

AI Technical Summary

Problems solved by technology

Due to the improvement of the structure of the planar diaphragm speaker, its manufacturing difficulty and cost are reduced, and the problem that the existing planar diaphragm speaker cannot be widely used is solved.

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