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:
Apr. 09, 2024
Filed:
Jun. 17, 2019
Applicant:
Tdk Corporation, Tokyo, JP;
Inventor:
Masahiro Hosokawa, Tokyo, JP;
Assignee:
TDK CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 7/09 (2021.01); G02B 7/02 (2021.01); H02N 2/00 (2006.01); H02N 2/04 (2006.01); G03B 3/10 (2021.01);
U.S. Cl.
CPC ...
G02B 7/09 (2013.01); G02B 7/023 (2013.01); H02N 2/006 (2013.01); H02N 2/04 (2013.01); G03B 3/10 (2013.01); G03B 2205/0061 (2013.01);
Abstract
A lens drive device including, a variation in a distance between the support point and an action point of the leaf spring member is suppressed, and a variation in a biasing force of the leaf spring member determined according to the distance between the support point and the action point is also suppressed. As a result, a frictional force of the frictional engagement between a friction engagement member and an actuator is uniform, and driving characteristics of the lens drive device are uniform.