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    • 1. 发明公开
    • MULTI-FUNCTION TYPE OSCILLATION ACTUATOR AND MOBILE TERMINAL DEVICE
    • 奥运会 - STELLGLIED DES MEHRFUNKTIONSTYPS UND MOBILESENDGERÄT
    • EP1755358A1
    • 2007-02-21
    • EP05721096.5
    • 2005-03-18
    • NAMIKI SEIMITSU HOUSEKI KABUSHIKI KAISHAUeda, Kenji
    • UEDA, Minoru c/o NAMIKI SEIMITSU HOUSEKI K.K.KANEDA, Shoichi c/o NAMIKI SEIMITSU HOUSEKI K.K.
    • H04R9/02H04M1/00H04R7/18H04R9/10
    • H04R7/12H04R7/18H04R9/00H04R2400/03H04R2499/11
    • [Problems]
      To provide a multifunction-type vibration actuator and a mobile terminal device capable of decreasing the lowest acoustic resonance frequency and preventing breakage of a coil lead as well as improving acoustic characteristics and preventing sound leaks.
      [Means for solving Problems]
      A portion near the outer periphery of a diaphragm 3 is bent to form a rising portion 3b extending along an inner periphery 1a of a housing 1 toward an open end thereof. This rising portion 3b serves as a corrugation to decrease the lowest resonance frequency and the amplitude of vibration of which a fulcrum is served by the rising portion 3b is not so large as that of the corrugation. Accordingly, the coil lead of a voice coil 4 is not easily broken. Furthermore, an extending portion 3c is formed to extend outward along a flat surface 1b formed at the open end of a housing 1 from a rising portion 3b. This enlarges the entire radius of the diaphragm 3 and improves the acoustic characteristics. Moreover, by arranging a flat surface 1b of a housing 1 parallel to an extending portion 3c of a diaphragm 3, a gasket can easily be attached.
    • [问题]提供一种能够降低最低声共振频率并防止线圈引线断线以及改善声学特性并防止声音泄漏的多功能型振动致动器和移动终端装置。 解决问题的手段隔膜3的外周附近的部分被弯曲,形成沿壳体1的内周1a向其开口端延伸的上升部3b。 该上升部分3b用作波纹以降低最低共振频率,并且由上升部分3b支撑支点的振动幅度不如波纹的那样大。 因此,音圈4的线圈引线不容易断裂。 此外,延伸部分3c形成为沿着形成在壳体1的开口端处的平坦表面1b从升高部分3b向外延伸。 这扩大了隔膜3的整个半径,并提高了声学特性。 此外,通过将壳体1的平坦表面1b平行于隔膜3的延伸部分3c布置,可以容易地安装垫圈。