a speaker

Abstract

The invention discloses a loudspeaker diaphragm which comprises a ball top part (20) in the center and a folding part (10) at the rim. The folding part (10) is a single layer structure made from a TPEE (thermoplastic polyester elastomer) material layer (2) or is a composite structure provided with at least one TPEE material layer (2). Compared with diaphragms made from TPU materials, the diaphragm of the invention has good toughness and strength, can effectively reduce the vibration frequency, and expand the bandwidth of a product. Further, the diaphragm is also stable in structure and reliable in withstanding power and provides good stability of vibration frequency.

Description

technical field [0001] The invention relates to the technical field of electroacoustic products, in particular to a loudspeaker. Background technique [0002] The diaphragm is the sound-generating part of the speaker, and its structure and material play a decisive role in the effect of the speaker. In order to reduce the resonant frequency of the product, widen the frequency band, and improve the sound quality of the low-frequency band and high-frequency band of the speaker, the ring part on the edge of the diaphragm often uses thermoplastic polyurethane elastomer (TPU) with high elasticity, large internal friction and good compliance. )Material. [0003] When TPU is used as the ring part of the diaphragm, the speaker product will have at least the following defects: [0004] First, the resonant frequency F0 of the product fluctuates greatly: after the speaker product is assembled, the resonant frequency F0 of the product increases with time; [0005] Second, poor heat re...

AI Technical Summary

Problems solved by technology

[0005] Second, poor heat resistance: After the diaphragm is heated and formed, the surface viscosity of TPU increases and is easily contaminated by impurities, thus affecting production efficiency;

[0006] Third, poor power resistance: after the high temperature power test, the diaphragm is prone to deformation and collapse

[0007] The structural characteristics of TPU determine the above-mentioned defects in its high temperature resistance and sensitivity to the environment. Although the above-mentioned properties can be improved to a certain extent by changing its chemical composition, the improvement effect is not obvious and there are limitations.

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