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:
Jun. 01, 2021
Filed:
Aug. 03, 2017
Nittoh Inc., Suwa, JP;
Kohei Kaneko, Suwa, JP;
Abstract
A lens barrel includes: a lens frame that holds a lens and is movable in the optical axial direction of the lens; and a moving mechanism that moves the lens frame in the optical axial direction. The moving mechanism includes: a feed screw; a drive source that rotates the feed screw; a biasing member that biases the lens frame toward direction side; a nut on the direction side of the lens frame that is screwed with the feed screw; and a low-friction member between the nut and the lens frame in the optical axial direction. At least one of a friction coefficient between the lens frame and the low-friction member or a friction coefficient between the nut and the low-friction member is smaller than a friction coefficient between the lens frame and the nut when the lens frame is in contact with the nut.