Magnetic circuit device for loudspeaker and combined magnetic circuit loudspeaker

Abstract

The invention relates to a combined magnetic circuit loudspeaker. The lower part of a voice coil surrounds first magnetic steel, and the upper end of the voice coil is fixedly connected with a diaphragm. The two ends of the diaphragm are fixedly connected with a shell. A nick is formed on each of symmetrical sidewalls of a magnetic bowl. Second magnetic steel is arranged in one nick, and third magnetic steel is arranged in the other nick. A second pole piece is arranged on the second magnetic steel, and a third pole piece is arranged on the third magnetic steel. The polarity of the end part of the second magnetic steel, which is connected with the second pole piece, is the same as that of the end part of the third magnetic steel, which is connected with the third pole piece, and is opposite to that of the end part of the first magnetic steel, which is connected with a first pole piece. A sound pressure level is improved by enhancing the intensity of a magnetic field; an output sound pressure level is effectively improved under the condition of no improvement in power; and particularly, the problem that the requirement of a consumer for the high-sound pressure and high-fidelity playing of music cannot be met by the output sound pressure of a mobile phone loudspeaker in the industry can be solved.

Description

technical field [0001] The invention relates to the technical field of loudspeakers, in particular to a magnetic circuit device of a loudspeaker and a combined magnetic circuit loudspeaker. Background technique [0002] Mobile phones have become one of the essential tools for people to communicate. With the development of science and technology, the degree of intelligence of mobile phones is also increasing. At present, there are various smart phones on the market. These smart phones can communicate with the network through wireless network transmission. Connect to allow users to enjoy various resources on the network, among which audio files and video files are the two most played files by people. When using a mobile phone to play audio and video files, the speaker on the mobile phone is often used. Due to the limited size of the mobile phone, the volume of the speaker on it is also limited accordingly, so the sound pressure level of the speaker is also limited accordingly...

AI Technical Summary

Problems solved by technology

[0004] In addition, another way to change the sound pressure level is to change the input current or voltage, thereby changing the output power. In this way, it is bound to change the design of the mobile phone battery or related circuits. By improving the electroacoustic conversion efficiency, Not only increases the power consumption, but also affects the service life of the speaker

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