Dual-magnetic-gap magnetic path system and loudspeaker with same

Abstract

The invention discloses a dual-magnetic-gap magnetic path system and loudspeaker with the same. The dual-magnetic-gap magnetic path system comprises T iron, an annular magnet, a first annular washer, an annular support member and a second annular washer. The annular magnet and the annular support member are arranged on a circular base plate of the T iron, and the first annular washer is arranged on the annular magnet; the second annular washer is arranged on the annular support member; and the first annular washer and the second annular washer form a first magnetic gap, the second annular washer and the side wall of a column core form a second magnetic gap, the first magnetic gap is used for suspending a first voice coil, and the second magnetic gap is used for suspending a second voice coil. According to the invention, the mutual induction electromotive force of the voice coils can be reduced, high-frequency replay distortion is improved, through introduction of the annular support member, change of nonlinear inductance of the coils can be reduced, and harmonic distortion is reduced.

Description

technical field [0001] The invention relates to the field of electroacoustic technology, in particular to a double-gap magnetic circuit system and a loudspeaker with the double-magnetic-gap magnetic circuit system. Background technique [0002] Common loudspeaker magnetic circuit systems such as figure 1 as shown, figure 1 It is a schematic cross-sectional diagram of a traditional loudspeaker magnetic circuit system, figure 1 The magnetic circuit system includes: T iron 1', magnet 2', washer 3' and voice coil 4'; T iron 1', magnet 2' and washer 3' form a ring magnetic circuit, and the voice coil 4' is suspended on In the magnetic gap formed by Washer 3' and T iron 1'; after the voice coil 4' is energized, it is forced in the magnetic field to drive the speaker vibration system to produce sound. [0003] The above loudspeaker magnetic circuit system has at least the following defects: [0004] First, according to Lenz's law, when the current drives the voice coil to vibra...

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Problems solved by technology

[0005] Second, the self-inductance of the voice coil changes nonlinearly with the frequency. When the speaker works at high frequencies, the self-inductance of the voice coil itself is too large, and the induced current is large, which adversely affects the work of the speaker, resulting in high-frequency Impaired Frequency Response

[0006] The above two defects will cause the electrical impedance value of the speaker to rise monotonously and rapidly as the frequency increases when f>fn (fn is the frequency value corresponding to the minimum impedance value), causing harmonic distortion

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