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    • 8. 发明专利
    • speaker
    • JP5326180B2
    • 2013-10-30
    • JP2009040680
    • 2009-02-24
    • オンキヨー株式会社
    • 浩靖 雲吉英 豊嶋弘一 定家
    • H04R7/04H04R9/04
    • PROBLEM TO BE SOLVED: To provide a speaker diaphragm which achieves a total driving planar thin type speaker for preventing easy generation of partial vibrations and obtaining flat frequency characteristics, improves reproduction efficiency, reduces operation defects, improves work efficiency on manufacture and suppresses a manufacture cost to be low, and the speaker using the same. SOLUTION: The speaker diaphragm is a planar diaphragm molded with the thickness of a synthetic resin foamed body kept almost constant, and includes: a grid-like connection part for forming a grid-like projected surface raised on the front surface side and a grid-like recessed surface recessed on the back surface side and connecting a voice coil assembly including a plurality of rectangular coils on the back surface side; a plurality of rectangular vibration surface parts stipulated on the inner side of the grid-like connection part; and an outer peripheral vibration surface part stipulated on the outer side of the grid-like connection part. COPYRIGHT: (C)2010,JPO&INPIT