Title:
LENS BARREL AND IMAGING APPARATUS
Document Type and Number:
Japanese Patent JP2023023703
Kind Code:
A
Abstract:
To provide a lens barrel which can control a position of a lens with high accuracy.SOLUTION: A lens barrel comprises: a drive source; a lead screw which is formed with a first thread groove and is rotationally driven by the drive source; a nut which has a first engagement part in which a second thread groove to be engaged with the first thread groove is formed, a second engagement part in which a third thread groove to be engaged with the first thread groove is formed, and an auxiliary part in which a fourth thread groove is formed, and moves in an axial direction of the lead screw following the rotation of the lead screw; a rotation regulation shaft which regulates the rotation of the nut; a first lens holding frame which holds a first lens; and a first biasing part which biases the nut so as to bring the nut into contact with the first lens holding frame. The phase of the second thread groove is different from the phase of the third thread groove. The fourth thread groove is disengaged from the first thread groove while the nut is moving following the rotation of the lead screw.SELECTED DRAWING: Figure 2
Inventors:
TOKUGAWA TOMOYUKI
HAMAZAKI TAKUJI
INOUE SUMIYOSHI
HAMAZAKI TAKUJI
INOUE SUMIYOSHI
Application Number:
JP2021129472A
Publication Date:
February 16, 2023
Filing Date:
August 06, 2021
Export Citation:
Assignee:
NIKON CORP
International Classes:
G02B7/04; G02B7/08
Attorney, Agent or Firm:
Shuhei Katayama
Toshinari Otake
Toshinari Otake
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