发明授权
- 专利标题： Tuning-fork-type piezoelectric vibrating piece with root portions having tapered surfaces in the thickness direction
- 专利标题（中）： 调音叉式压电振动片，其根部在厚度方向上具有锥形表面
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申请号： US12574649申请日： 2009-10-06
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公开(公告)号： US08093787B2公开(公告)日： 2012-01-10
- 发明人: Ryoichi Ichikawa
- 申请人： Ryoichi Ichikawa
- 申请人地址： JP Tokyo
- 专利权人： Nihon Dempa Kogyo Co., Ltd.
- 当前专利权人： Nihon Dempa Kogyo Co., Ltd.
- 当前专利权人地址： JP Tokyo
- 代理机构： Klarquist Sparkman, LLP
- 优先权： JP2008-259376 20081006
- 主分类号： H03H9/19
- IPC分类号： H03H9/19
摘要：
Tuning-fork-type crystal vibrating pieces are disclosed that have a base and a pair of vibrating arms extending from one side of the base in a designated longitudinal direction. A root portion is situated between the vibrating arms, and includes a first taper surface. Extending outboard of the vibrating arms from respective sides of the base are respective supporting arms that extend in the designated direction. Between each supporting arm and the respective vibrating arm is a respective supporting-arm root portion. Each supporting-arm root portion has a second taper surface in the thickness direction of the base.
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