The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 05, 2013
Filed:
Jan. 20, 2009
Shuuichi Sato, Kawasaki, JP;
Yuichi Someya, Tokyo, JP;
Hideyuki Nishida, Yokohama, JP;
Takao Yokomatsu, Yokohama, JP;
Kentaro Nakamura, Yokohama, JP;
Shuuichi Sato, Kawasaki, JP;
Yuichi Someya, Tokyo, JP;
Hideyuki Nishida, Yokohama, JP;
Takao Yokomatsu, Yokohama, JP;
Kentaro Nakamura, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In a piezoelectric vibration type force sensor according to the present invention, vibration is restricted by a friction force between a piezoelectric body and a restricting member, and hence a range of sensing forces can be expanded compared with a case in which the vibration is restricted directly from a direction that is the same as an vibration direction. A conventional structure, in which a lead wire is soldered directly for electrically connecting the piezoelectric body to an external control circuit, causes a restriction of the vibration due to a solder attached to the piezoelectric body, resulting in narrowing the sensing range. Using the piezoelectric vibration type force sensor, the range of sensing forces can be expanded by making a state in which conducting portions of the piezoelectric body and the restricting member are not fixed but contact with each other for keeping electric conductivity.