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. 24, 2022
Filed:
Feb. 18, 2019
Applicant:
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Inventor:
Hiroyasu Fujinaka, Osaka, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B 3/10 (2021.01); H02K 41/035 (2006.01); G02B 7/08 (2021.01); G03B 13/32 (2021.01); G03B 17/12 (2021.01);
U.S. Cl.
CPC ...
G03B 3/10 (2013.01); G02B 7/08 (2013.01); G03B 13/32 (2013.01); H02K 41/0356 (2013.01); G03B 17/12 (2013.01);
Abstract
A focusing unit () comprises a linear motor driven in two phases, and comprises a two-phase coil () and a drive magnet () that is disposed along the drive direction at a position opposite the two-phase coil (). The winding width of the coils () in the portion opposite the drive magnet () is within an electrical angle range of 120°±7.7°, the average width of the coil at the portion opposite the drive magnet () is within an electrical angle range of 144°±4.6°, and the pitch between the two phases of coil () is an electrical angle of 90°+180°×n (n is an integer of 0 or more).