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US 5,495,766 AGranted
Ultrasonic sensor
AssigneeMurata Manufacturing Co., Ltd.
InventorsMasaharu Kota, Kazuya Nakatera
Life of this patent
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Abstract
An ultrasonic sensor (21) includes a case consisting of a case body (21) and a base (23), a piezoelectric diaphragm (25) which is arranged in the case, a conical vibrator (32) which is bonded to an ultrasonic transmitting/receiving side of the piezoelectric diaphragm (25), and a tubular member (24) which is arranged in front of the vibrator (32) for guiding ultrasonics.
Claims9
An ultrasonic sensor comprising:
- a case being provided with at least one through hole in a surface for receiving/transmitting ultrasonics;
- a piezoelectric diaphragm being arranged in said case;
- a vibrator being bonded to a surface of said piezoelectric diaphragm for transmitting/receiving ultrasonics and to vibrate with said piezoelectric diaphragm;
- and
- a tubular member having a cylindrical inner surface formed with a substantially uniform diameter along an axial direction of said tubular member and being arranged in said case in front of said vibrator for guiding ultrasonics from said vibrator to the exterior of said case or from the exterior to said vibrator and said piezoelectric diaphragm.
2 more elements
Dependencies are inferred from the claim text.