US 11,835,736 B2
Optical device actuator and lens barrel provided with same
Makoto Umeda, Osaka (JP); Tetsuya Uno, Osaka (JP); Naoki Yoshikawa, Osaka (JP); Takeshi Sakakibara, Osaka (JP); and Kenichi Miyamori, Hyogo (JP)
Assigned to Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Appl. No. 16/963,492
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Jan. 25, 2019, PCT No. PCT/JP2019/002585
§ 371(c)(1), (2) Date Jul. 20, 2020,
PCT Pub. No. WO2019/146771, PCT Pub. Date Aug. 1, 2019.
Claims priority of application No. 2018-011605 (JP), filed on Jan. 26, 2018.
Prior Publication US 2021/0048682 A1, Feb. 18, 2021
Int. Cl. G02B 27/64 (2006.01); G03B 5/00 (2021.01); G02B 7/02 (2021.01); G02B 7/08 (2021.01)
CPC G02B 27/646 (2013.01) [G02B 7/023 (2013.01); G02B 7/026 (2013.01); G02B 7/08 (2013.01); G03B 5/00 (2013.01); G03B 2205/0007 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An optical device actuator, comprising:
a fixed frame;
a guide shaft that is held by the fixed frame;
a movable frame configured to move along the guide shaft;
a driver configured to move the movable frame relative to the fixed frame along the guide shaft; and
a vibration imparting unit configured to impart vibration to the guide shaft,
wherein, if we let α be the acceleration of the vibration imparted by the vibration imparting unit to the guide shaft, mk be a mass of the movable frame, and T be a frictional force acting between the guide shaft and the movable frame,
the vibration imparting unit imparts the vibration to the guide shaft so as to satisfy a following relational expression (1):
T<α×mk  (1)