Optical unit with shake correction function

Patent metadata

Field	Value
Publication number	US-2021240001-A1
Application number	US-202117160373-A
Country	US
Kind code	A1
Filing date	Jan 28, 2021
Priority date	Jan 30, 2020
Publication date	Aug 5, 2021
Grant date	—

Abstract

An optical unit with a shake correction function has a shake correction function for correcting a shake of an optical module. The optical unit with a shake correction function includes: a movable body including the optical module; a fixed body disposed outward of the movable body in a radial direction with respect to an optical axis of the optical module; and a support part disposed between the movable body and the fixed body in the radial direction and structured to support the movable body such that the movable body is swingable relative to the fixed body. The movable body and the support part or the support part and the fixed body have, in a pair, a swing mechanism structured to allow the movable body to swing relative to the fixed body. The swing mechanism includes a protruded spherical portion and a recessed spherical portion that is larger in radius of curvature than the protruded spherical portion.

First claim

What is claimed is:

1 . An optical unit with a shake correction function for correcting a shake of an optical module, the optical unit comprising:
a movable body including the optical module; a fixed body disposed outward of the movable body in a radial direction with respect to an optical axis of the optical module; and a support part disposed between the movable body and the fixed body in the radial direction and structured to support the movable body such that the movable body is swingable relative to the fixed body, wherein the movable body and the support part or the support part and the fixed body have, in a pair, a swing mechanism structured to allow the movable body to swing relative to the fixed body, and the swing mechanism includes:
a protruded spherical portion; and
a recessed spherical portion that is larger in radius of curvature than the protruded spherical portion.

2 . The optical unit with a shake correction function according to claim 1 , wherein
the movable body and the support part have the swing mechanism in a pair, and one of the movable body and the support part includes the protruded spherical portion, and the other includes the recessed spherical portion.

3 . The optical unit with a shake correction function according to claim 1 , wherein
the support part and the fixed body have the swing mechanism in a pair, and the support part swings relative to the fixed body in conjunction with the movable body.

4 . The optical unit with a shake correction function according to claim 1 , wherein
the protruded spherical portion is in point-contact with the recessed spherical portion.

5 . The optical unit with a shake correction function according to claim 4 , wherein
the recessed spherical portion is in point-contact with the protruded spherical portion at multiple positions.

6 . The optical unit with a shake correction function according to claim 2 , wherein
the support part includes: a swing support member including the recessed spherical portion or the protruded spherical portion, the swing support member being in contact with the protruded spherical portion or the recessed spherical portion of the movable body; and an elastic member fixed to the swing support member and disposed between the swing support member and the fixed body in the radial direction.

7 . The optical unit with a shake correction function according to claim 2 , wherein
the movable body includes the protruded spherical portion protruded radially outward, and the swing support member includes the recessed spherical portion recessed radially outward.

8 . The optical unit with a shake correction function according to claim 6 , wherein
the movable body includes the protruded spherical portion protruded radially outward, and the swing support member includes the recessed spherical portion recessed radially outward.

9 . The optical unit with a shake correction function according to claim 2 , wherein
the movable body includes the recessed spherical portion recessed radially inward, and the swing support member includes the protruded spherical portion protruded radially inward.

10 . The optical unit with a shake correction function according to claim 6 , wherein
the movable body includes the recessed spherical portion recessed radially inward, and the swing support member includes the protruded spherical portion protruded radially inward.

11 . The optical unit with a shake correction function according to claim 2 , wherein
the movable body includes a holder disposed radially outward of the optical module and structured to hold the optical module, and the holder includes the protruded spherical portion or the recessed spherical portion.

12 . The optical unit with a shake correction function according to claim 6 , wherein
the movable body includes a holder disposed radially outward of the optical module and structured to hold the optical module, and the holder includes the protruded spherical portion or the recessed spherical portion.

13 . The optical unit with a shake correction function according to claim 3 , wherein
the support part includes: an elastic member fixed to the movable body; and the protruded spherical portion provided on the elastic member and protruded radially outward, and the fixed body includes the recessed spherical portion recessed radially outward.

Assignees

• Nidec Corp

Inventors

• Tanaka Genki
• Egawa Tomohiro
• Iwase Takayuki
• Sazai Kazuhiro
• Arai Tsutomu
• Minamisawa Shinji
• Sue Takeshi

Classifications

• G03B5/00 Primary

  Adjustment of optical system relative to image or object surface other than for focusing · CPC title

• G02B27/646 Primary

  compensating for small deviations, e.g. due to vibration or shake (movement of one or more optical elements for control of motion blur in cameras, projectors or printers G03B2205/0007; image stabilisation in cameras peculiar to the presence or use of an electronic image sensor H04N23/68) · CPC title