# US 2021/0240002 A1 · Optical unit with image stabilization function > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0240002 A1 - Document ID: US20210240002A1 - Status: Published application - Kind: A1 - Application number: 17/160,375 - Filed: 2021-01-28 - Published: 2021-08-05 - Earliest claimed: 2020-01-30 - Assignees: Nidec Corporation - Applicants: Nidec Corporation - Inventors: Kazuhiro SAZAI; Tsutomu ARAI; Tomohiro EGAWA; Shinji MINAMISAWA; Takayuki IWASE; Takeshi SUE; Genki TANAKA - Web page: https://patentgrep.com/patent/US20210240002A1 ## CPC - G02B 27/646: {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)} - G03B 5/00: Adjustment of optical system relative to image or object surface other than for focusing - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D) ## Abstract An optical unit with an image stabilization function includes a movable body having an annular holder for holding a camera module, a swing support mechanism for swingably supporting the movable body, and a fixing body for supporting the movable body with the swing support mechanism interposed between them. The holder includes three or more of a plurality of protrusions that project radially. The fixing body includes a plurality of arc surfaces that come into contact with each of the plurality of protrusions from the outer peripheral side. The swing support mechanism includes the plurality of protrusions and the plurality of arc surfaces. The arc surface is a concave curved surface obtained by transferring part of a virtual spherical surface centered on a preset swing center point. ## Claims ### Claim 1 An optical unit with an image stabilization function, comprising: a movable body having a camera module and a frame-shaped holder that surrounds the camera module from an outer peripheral side; a swing support mechanism that swingably supports the movable body around a swing center point set in advance on an optical axis of the camera module inside the movable body; and a fixing body that supports the movable body with the swing support mechanism interposed therebetween, wherein the holder includes three or more of a plurality of protrusions that project radially, the fixing body includes a plurality of arc surfaces that come into contact with each of the plurality of protrusions from an outer peripheral side, the swing support mechanism includes the plurality of protrusions and the plurality of arc surfaces, and the arc surface is a concave curved surface obtained by transferring part of a virtual spherical surface centered on the swing center point. ### Claim 2 (depends on 1) The optical unit with an image stabilization function according to claim 1, wherein each of the plurality of protrusions extends in a direction orthogonal to the optical axis, and the fixing body includes a frame-shaped case that surrounds the movable body from a radial outside, and the plurality of arc surfaces are provided on a radial inner surface of the fixing body. ### Claim 3 (depends on 2) The optical unit with an image stabilization function according to claim 2, wherein the swing support mechanism includes three or four protrusions. ### Claim 4 (depends on 1) The optical unit with an image stabilization function according to claim 1, further comprising: an image stabilization magnetic drive mechanism that causes the movable body to swing in a direction intersecting the optical axis, wherein the image stabilization magnetic drive mechanism includes an image stabilization magnet fixed to one of the holder and the fixing body and an image stabilization coil that is fixed to the other of the holder and the fixing body and faces the image stabilization magnet. ### Claim 5 (depends on 1) The optical unit with an image stabilization function according to claim 1, further comprising: a rolling correction magnetic drive mechanism that causes the movable body to swing around the optical axis, wherein the rolling correction magnetic drive mechanism includes a rolling correction magnet fixed to one of the holder and the fixing body and a rolling correction coil that is fixed to the other of the holder and the fixing body and faces the rolling correction magnet. ### Claim 6 (depends on 1) The optical unit with an image stabilization function according to claim 1, wherein a tip surface of each protrusion is in contact with each arc surface at a point so as to be slidable. ### Claim 7 (depends on 1) The optical unit with an image stabilization function according to claim 1, wherein a tip surface of each protrusion is in contact with each arc surface on a surface so as to be slidable. ### Claim 8 (depends on 7) The optical unit with an image stabilization function according to claim 7, wherein a tip surface of each protrusion or each arc surface has irregularities, and grease is applied between a tip surface of each protrusion and each arc surface. ### Claim 9 (depends on 7) The optical unit with an image stabilization function according to claim 7, wherein a coating layer having a hardness higher than that of each protrusion is provided on a tip surface of each protrusion.