• 专利标题:   Vibration diaphragm used in sounding device e.g. loudspeaker, comprises modified ethylene-vinyl acetate rubber film layer formed by mixing inorganic hollow microspheres having preset distribution density, additive and ethylene-vinyl acetate polymer to obtain mixed powder, and crosslinking.
  • 专利号:   CN116074700-A
  • 发明人:   ZHANG C, LIU C, LING F, LI C, HUI B, MA C
  • 专利权人:   GOERTEK INC
  • 国际专利分类:   H04R031/00, H04R007/04, H04R007/06, H04R009/02, H04R009/06
  • 专利详细信息:   CN116074700-A 05 May 2023 H04R-007/04 202349 Chinese
  • 申请详细信息:   CN116074700-A CN11273401 29 Oct 2021
  • 优先权号:   CN11273401

▎ 摘  要

NOVELTY - A vibrating diaphragm comprises at least one layer of modified ethylene-vinyl acetate rubber film layer formed by mixing inorganic hollow microspheres, additive and ethylene-vinyl acetate polymer to mixed rubber, and crosslinking. The particle size of the inorganic hollow microspheres is 1-60 µm. The distribution density of inorganic hollow microspheres in the modified ethylene-vinyl acetate rubber film layer is 0.15-0.9 g/cm3. The loss factor of the modified ethylene-vinyl acetate rubber film layer is 0.11 or more, after baking at 150℃ for 168 hours. USE - Vibrating diaphragm is used in sounding device (claimed) e.g. loudspeaker of intelligent electronic device. ADVANTAGE - The vibrating diaphragm has excellent damping performance even in high-temperature environment, and improves the intermediate frequency sensitivity of the sounding device. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a sounding device.