| 发明名称 | Directional loudspeaker | ||
| 摘要 | In a directional loudspeaker, an audible sound signal that is modulated with a carrier wave in the ultrasonic wave band is input to a piezoelectric element, and thereby a diaphragm having the piezoelectric element is vibrated and a sound wave is generated. In such a directional loudspeaker, the diaphragm is fixed to a fixed part via a plurality of beams disposed along the outer circumference of the diaphragm. | ||
| 申请公布号 | US9253578(B2) | 申请公布日期 | 2016.02.02 |
| 申请号 | US201214237481 | 申请日期 | 2012.08.28 |
| 申请人 | Panasonic Intellectual Property Management Co., Ltd. | 发明人 | Konno Fumiyasu;Takeda Katsu |
| 分类号 | H04R17/00;H04R1/32;H04R7/20;H04R1/40 | 主分类号 | H04R17/00 |
| 代理机构 | McDermott Will & Emery LLP | 代理人 | McDermott Will & Emery LLP |
| 主权项 | 1. A directional loudspeaker comprising a vibrator including: a diaphragm having a circular shape; a piezoelectric element disposed on at least one of a top face and a bottom face of the diaphragm; beams disposed in at least a part of an outer circumference of the diaphragm; and a fixed part disposed outside the beams, wherein: slits are formed by adjacent two of the beams and at least one of the diaphragm and the fixed part, and the beams form a helical shape from the diaphragm to the fixed part. | ||
| 地址 | Osaka JP | ||