A speaker with automatic volume adjustment

Abstract

The invention discloses a sound box capable of automatically adjusting volume. The sound box comprises a sound box body, and a first cavity is arranged in the sound box body. Main boxes capable of transmitting sound are symmetrically arranged at the left and right positions of the lower side of the first cavity in the sound box body. Each main box comprises a fixing rod fixedly connected with theinner wall of the main box. Through transmission of a guide rail shaft and a guide rail rod and pushing of an air cylinder, the number of playing sound boxes is increased, and the purposes of enhancing sound transmission and increasing volume are achieved. Meanwhile, directional transmission of sound of the sound box is achieved through a disc base and a rotating shaft rotationally installed on the sound box body, a permanent magnet is attracted to make contact with a metal probe after an electromagnet is powered on, and therefore, a voice coil circuit is connected, and the purpose of playingthe sound is achieved.

Description

technical field [0001] The invention relates to the technical field of loudspeakers, in particular to a sound box for automatically adjusting volume. Background technique [0002] Ordinary speakers are generally fixed, and cannot automatically play directional playback according to people's needs, so that the sound played is low and the sound transmission efficiency is reduced. If the speaker wants to increase the volume, multiple speakers need to work together, but many Installing two loudspeakers in one sound box will cause the cancellation of the transmitted sound and increase the cost of the sound box. The sound box mainly interacts with the magnetic field of the permanent magnet through the changing magnetic field generated when the audio current passes through the voice coil, so that the voice coil moves along the axial direction. Vibration produces sound, so directly controlling the on-off of the voice coil circuit can effectively control the sound playback and save c...

AI Technical Summary

Problems solved by technology

[0002] Ordinary speakers are generally fixed, and cannot automatically play directional playback according to people's needs, so that the sound played is low and the sound transmission efficiency is reduced. If the speaker wants to increase the volume, multiple speakers need to work together, but many Installing two loudspeakers in one sound box will cause the cancellation of the transmitted sound and increase the cost of the sound box. The sound box mainly interacts with the magnetic field of the permanent magnet through the changing magnetic field generated when the audio current passes through the voice coil, so that the voice coil moves along the axial direction. Vibration produces sound, so directly controlling the on-off of the voice coil circuit can effectively control the sound playback and save cost consumption

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