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:
May. 09, 2017
Filed:
Apr. 02, 2012
Hiroshi Nakagawa, Tokyo, JP;
Takayoshi Fujii, Tokyo, JP;
Takashi Fukunaga, Tokyo, JP;
Yasuhiro Sakai, Tokyo, JP;
Takashi Onoue, Tokyo, JP;
Hiroshi Nakagawa, Tokyo, JP;
Takayoshi Fujii, Tokyo, JP;
Takashi Fukunaga, Tokyo, JP;
Yasuhiro Sakai, Tokyo, JP;
Takashi Onoue, Tokyo, JP;
SINFONIA TECHNOLOGY CO., LTD., Tokyo, JP;
Abstract
A linear actuator includes an inner core, and an outer core that is provided outside the inner core in a radial direction while being supported by a pair of flat springs. Permanent magnets are formed at one of the inner core and the outer core, and magnetic pole portions are formed at the other of the inner core and the outer core to face the permanent magnet with predetermined gaps formed therebetween. Spacers are respectively provided between the inner core and the flat springs, abutting portions are respectively configured by abutting facing surfaces of the spacers and the inner core and facing surfaces of the spacers and the flat springs adjacent to the spacers in the axial direction, and a plurality of engagement portions including recesses and protrusions are arranged at the abutting portions.