发明名称 |
Ultrasonic sensor |
摘要 |
An ultrasonic sensor includes a substantially cylindrical case including a bottom portion and a side wall portion and a plurality of members disposed within the case. A reinforcement having a substantially ring shape is fitted on a thick section in the case at a location that is not in contact with an inner surface of a thin section of the side wall portion. A piezoelectric element is attached to an inner bottom surface of the case. An elastic member is fitted on the reinforcement so as to cover a substantially ring-shaped opening region of the reinforcement. A gap between the elastic member and an inner circumferential surface of the case is filled with a first filler. The terminal holding member is placed on the elastic member. A surrounding region of the terminal holding member is filled with a second filler. |
申请公布号 |
US9064486(B2) |
申请公布日期 |
2015.06.23 |
申请号 |
US201113111201 |
申请日期 |
2011.05.19 |
申请人 |
MURATA MANUFACTURING CO., LTD. |
发明人 |
Sato Takehiro |
分类号 |
B06B1/06;G10K9/122;G10K11/00 |
主分类号 |
B06B1/06 |
代理机构 |
Arent Fox LLP |
代理人 |
Arent Fox LLP |
主权项 |
1. An ultrasonic sensor comprising:
a case including a bottom portion and a side wall portion that define an inner space; a piezoelectric element located within the inner space of the case and attached to the bottom portion of the case; a terminal positioned within the inner space of the case and extending outside the case; a conductive member that connects the terminal and an electrode of the piezoelectric element; a first filler located within the inner space of the case so as to contact the side wall portion of the case; and a second filler surrounding the terminal, wherein the first filler has a modulus of elasticity higher than that of the second filler, wherein the side wall portion of the case includes a first section adjacent the bottom portion and a second section adjacent the first section, the first section being thicker than the second section, and the first section includes a hollow portion sized to accommodate the piezoelectric element, the ultrasonic sensor further comprising: a reinforcement at the first section of the side wall portion and disposed so as to not contact the second section of the side wall portion; an elastic member disposed on the reinforcement and between the second filler and the piezoelectric element and not contacting the side wall portion of the case, such that a gap between the side wall portion and the elastic member is filled with the first filler; and a sound absorber disposed between the piezoelectric element and the elastic member. |
地址 |
Nagaokakyo-Shi, Kyoto-Fu JP |