# US 2021/0240000 A1 · Optical unit with shake correction function > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0240000 A1 - Document ID: US20210240000A1 - Status: Published application - Kind: A1 - Application number: 17/155,106 - Filed: 2021-01-22 - Published: 2021-08-05 - Earliest claimed: 2020-01-30 - Assignees: Nidec Sankyo Corporation - Applicants: Nidec Sankyo Corporation - Inventors: Shogo KASAHARA; Shinji HATANO; Tsutomu ARAI - Web page: https://patentgrep.com/patent/US20210240000A1 ## 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)} - G02B 7/02: for lenses {(supports for magnifying lenses G02B25/002)} - H04N 23/55: Optical parts specially adapted for electronic image sensors; Mounting thereof - H04N 23/57: Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices - H04N 23/6815: {by distinguishing pan or tilt from motion} - H04N 23/687: {by shifting the lens or sensor position} - G03B 2205/0007: Movement of one or more optical elements for control of motion blur - G03B 2205/0023: by tilting or inclining one or more optical elements with respect to the optical axis - G03B 2205/0069: using electromagnetic actuators, e.g. voice coils - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - 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 may include a movable body, a turning support mechanism turnably supporting the movable body around an optical axis, a gimbal mechanism turnably supporting the turning support mechanism, and a fixed body. The turning support mechanism includes a plate roll fixed to the movable body, a plate holder having a facing part facing the plate roll in the optical axis direction and is turnably supported by the gimbal mechanism, spherical bodies disposed between the plate roll and the facing part, and a magnetic attraction mechanism for generating an attraction force so that the plate roll and the facing part approach each other in the optical axis direction. The magnetic attraction mechanism includes an attraction part provided in one of the plate roll and the plate holder and an attracted part provided in the other, and the attraction part includes a magnet. ## Claims ### Claim 1 An optical unit with a shake correction function, comprising: a movable body comprising a camera module; a turning support mechanism which turnably supports the movable body around an optical axis of a lens of the camera module; a gimbal mechanism which turnably supports the turning support mechanism around a first axis intersecting the optical axis and turnably supports the turning support mechanism around a second axis intersecting the optical axis and the first axis; and a fixed body which supports the movable body through the gimbal mechanism and the turning support mechanism; wherein the turning support mechanism comprises: a plate roll which is fixed to the movable body; a plate holder which comprises a facing part which faces the plate roll in a direction of the optical axis, and the plate holder being supported by the gimbal mechanism in a turnable state around the first axis; a plurality of spherical bodies which are capable of rolling between the plate roll and the facing part; and a magnetic attraction mechanism structured to generate an attraction force so that the plate roll and the facing part come close to each other in the direction of the optical axis; wherein the magnetic attraction mechanism comprises: an attraction part which is provided in a part in a circumferential direction around the optical axis in one of the plate roll and the plate holder; and an attracted part which is provided in a part in the circumferential direction in an other of the plate roll and the plate holder and is attracted by the attraction part; and wherein the attraction part comprises a magnet. ### Claim 2 (depends on 1) The optical unit with a shake correction function according to claim 1, wherein the other of the plate roll and the plate holder is nonmagnetic, and the attracted part comprises a magnetic member which is fixed to the other of the plate roll and the plate holder. ### Claim 3 (depends on 1) The optical unit with a shake correction function according to claim 1, wherein the other of the plate roll and the plate holder is nonmagnetic, and the attracted part comprises a second magnet which is fixed to the other of the plate roll and the plate holder. ### Claim 4 (depends on 1) The optical unit with a shake correction function according to claim 1, wherein the other of the plate roll and the plate holder comprises: a magnetic portion made of magnetic material; and a nonmagnetic portion made of nonmagnetic material, wherein the attracted part is the magnetic portion. ### Claim 5 (depends on 1) The optical unit with a shake correction function according to claim 1, wherein a length dimension in the circumferential direction of the attraction part and a length dimension in the circumferential direction of the attracted part are same as each other. ### Claim 6 (depends on 1) The optical unit with a shake correction function according to claim 1, wherein the magnet is polarized and magnetized in the circumferential direction. ### Claim 7 (depends on 1) The optical unit with a shake correction function according to claim 1, wherein the attraction part is provided on both sides with the optical axis interposed therebetween, and the attracted part is provided at a position where the attracted part faces the attraction part on each of both sides with the optical axis interposed therebetween. ### Claim 8 (depends on 7) The optical unit with a shake correction function according to claim 7, wherein the plate roll comprises: a plate roll ring-shaped part which surrounds the optical axis; and a pair of plate roll extended parts which are protruded from the plate roll ring-shaped part to both sides in a direction of the second axis, wherein each of the pair of the plate roll extended parts comprises: a first plate roll extended portion which is extended from the plate roll ring-shaped part in the direction of the second axis; a second plate roll extended portion which is extended in the direction of the optical axis on an outer peripheral side with respect to the first plate roll extended portion and is fixed to the movable body; and a third plate roll extended portion which connects the first plate roll extended portion with the second plate roll extended portion, wherein the plate holder comprises: a plate holder ring-shaped part which is coaxial with the plate roll ring-shaped part; and a pair of plate holder protruded parts which are protruded from the plate holder ring-shaped part to both sides in the direction of the second axis, wherein the spherical bodies are located between the plate roll ring-shaped part and the plate holder ring-shaped part, one of each of a pair of the first plate roll extended portions and each of a pair of the plate holder protruded parts is provided with the attraction part, and an other of each of the pair of the first plate roll extended portions and each of the pair of the plate holder protruded parts is provided with the attracted part. ### Claim 9 (depends on 7) The optical unit with a shake correction function according to claim 7, wherein the plate roll comprises: a plate roll ring-shaped part which surrounds the optical axis; and plate roll protruded parts which are protruded from the plate roll ring-shaped part to both sides in a direction of the first axis, wherein the plate holder comprises: a plate holder ring-shaped part which is coaxial with the plate roll ring-shaped part; and a pair of plate holder extended parts which are protruded from the plate holder ring-shaped part to both sides in the direction of the first axis, wherein each of the pair of the plate holder extended parts comprises: a first plate holder extended portion which is extended from the plate holder ring-shaped part in the direction of the first axis; a second plate holder extended portion which is extended in the direction of the optical axis on an outer peripheral side with respect to the first plate holder extended portion and the movable body; and a third plate holder extended portion which connects the first plate holder extended portion with the second plate holder extended portion, wherein the gimbal mechanism supports each of a pair of the second plate holder extended portions, the spherical bodies are located between the plate roll ring-shaped part and the plate holder ring-shaped part, one of each of a pair of the first plate holder extended portions and each of a pair of the plate roll protruded parts is provided with the attraction part, and an other of each of the pair of the first plate holder extended portions and each of the pair of the plate roll protruded parts is provided with the attracted part. ### Claim 10 (depends on 9) The optical unit with a shake correction function according to claim 9, further comprising: a first stopper member which is fixed to the plate roll, wherein the first stopper member comprises: one side stopper part which faces the plate holder extended part through a gap space from one side in the circumferential direction; and an other side stopper part which faces the plate holder extended part through a gap space from an other side in the circumferential direction. ### Claim 11 (depends on 9) The optical unit with a shake correction function according to claim 9, further comprising: a stopper member which is fixed to the plate roll, wherein the stopper member comprises: a stopper part which faces the facing part through a gap space on an opposite side to the plate roll with respect to the facing part in the direction of the optical axis; one side stopper part which faces the plate holder extended part through a gap space from one side in the circumferential direction; and an other side stopper part which faces the plate holder extended part through a gap space from an other side in the circumferential direction. ### Claim 12 (depends on 8) The optical unit with a shake correction function according to claim 8, further comprising: a second stopper member which is fixed to the plate roll, wherein the second stopper member comprises a stopper part which faces the facing part through a gap space on an opposite side to the plate roll with respect to the facing part in the direction of the optical axis. ### Claim 13 (depends on 9) The optical unit with a shake correction function according to claim 9, further comprising: a second stopper member which is fixed to the plate roll, wherein the second stopper member comprises a stopper part which faces the facing part through a gap space on an opposite side to the plate roll with respect to the facing part in the direction of the optical axis. ### Claim 14 (depends on 10) The optical unit with a shake correction function according to claim 10, further comprising: a second stopper member which is fixed to the plate roll, wherein the second stopper member comprises a stopper part which faces the facing part through a gap space on an opposite side to the plate roll with respect to the facing part in the direction of the optical axis. ### Claim 15 (depends on 1) The optical unit with a shake correction function according to claim 1, wherein the gimbal mechanism comprises: a gimbal frame; a first connection mechanism which turnably connects the plate holder with the gimbal frame around the first axis on an outer peripheral side in a direction of the first axis with respect to the movable body; and a second connection mechanism which turnably connects the gimbal frame with the fixed body around the second axis on an outer peripheral side in a direction of the second axis with respect to the movable body. ### Claim 16 (depends on 1) The optical unit with a shake correction function according to claim 1, further comprising: a shake correction magnetic drive mechanism structured to turn the movable body around the first axis and around the second axis; and a rolling correction magnetic drive mechanism structured to turn the movable body around the optical axis, wherein the shake correction magnetic drive mechanism and the rolling correction magnetic drive mechanism are arranged in the circumferential direction around the optical axis, wherein the shake correction magnetic drive mechanism comprises: a shake correction magnet which is fixed to one of the movable body and the fixed body; and a shake correction coil which is fixed to an other of the movable body and the fixed body, wherein the rolling correction magnetic drive mechanism comprises: a rolling correction magnet which is fixed to one of the movable body and the fixed body; and a rolling correction coil which is fixed to an other of the movable body and the fixed body; wherein the magnet is disposed at an angular position different from positions of the shake correction magnet and the rolling correction magnet around the optical axis.