- 专利标题： ACOUSTIC DEVICE, AND ELECTRONIC DEVICE AND IMAGE FORMING APPARATUS INCORPORATING SAME
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申请号： US14978890申请日： 2015-12-22
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公开(公告)号： US20160111075A1公开(公告)日： 2016-04-21
- 发明人: Masahiro Ishida , Naoki Matsuda
- 申请人： Masahiro Ishida , Naoki Matsuda
- 申请人地址： JP Tokyo
- 专利权人： Ricoh Company, Ltd.
- 当前专利权人： Ricoh Company, Ltd.
- 当前专利权人地址： JP Tokyo
- 优先权： JP2014-036268 20140227
- 主分类号： G10K11/00
- IPC分类号： G10K11/00 ; G10K11/04 ; G03G21/16
摘要：
An acoustic device includes an opening; a flange forming the opening; a first member including the opening and the flange; and a second member joined to the first member, thereby forming a cavity. The second member is formed of a material with a density lower than a material of the first member.
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