# US 2018/0321506 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 2018/0321506 A1 - Document ID: US20180321506A1 - Status: Published application - Kind: A1 - Application number: 15/972,237 - Filed: 2018-05-07 - Published: 2018-11-08 - Earliest claimed: 2017-05-08 - Assignees: Nidec Sankyo Corporation - Applicants: Nidec Sankyo Corporation - Inventors: Shinji MINAMISAWA; Takeshi SUE - Web page: https://patentgrep.com/patent/US20180321506A1 ## 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)} - H04N 23/55: Optical parts specially adapted for electronic image sensors; Mounting thereof - H04N 23/682: {Vibration or motion blur correction} - H04N 23/687: {by shifting the lens or sensor position} - 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 with a shake correction function may include a movable body having an optical element, a turnable support mechanism structured to turnably support the movable body around an optical axis of the optical element, a fixed body supporting the movable body through the turnable support mechanism, a magnetic rolling drive mechanism structured to turn the movable body, and an angular position return mechanism structured to return the movable body to a reference angular position around the optical axis. The magnetic rolling drive mechanism may include a coil and a magnet facing the coil. The magnet is polarized and magnetized in a circumferential direction. The angular position return mechanism includes a magnetic member attached to the movable body and, when the movable body is located at the reference angular position, an imaginary plane which includes a magnetizing polarized line of the magnet passes a center of the magnetic member. ## Claims ### Claim 1 An optical unit with a shake correction function comprising: a movable body comprising an optical element; a turnable support mechanism structured to turnably support the movable body around an optical axis of the optical element; a fixed body which supports the movable body through the turnable support mechanism; a magnetic rolling drive mechanism structured to turn the movable body; and an angular position return mechanism structured to return the movable body to a reference angular position around the optical axis; wherein the magnetic rolling drive mechanism comprises: a coil which is fixed to one of the movable body and the fixed body; and a magnet which is fixed to the other of the movable body and the fixed body so as to face the coil; wherein the magnet is polarized and magnetized in a circumferential direction; wherein the angular position return mechanism comprises a magnetic member which is attached to the one of the movable body and the fixed body to which the coil is fixed; and wherein when the movable body is located at the reference angular position, an imaginary plane which includes a magnetizing polarized line of the magnet and is parallel to the optical axis passes a center of the magnetic member. ### Claim 2 (depends on 1) The optical unit with a shake correction function according to claim 1, wherein the magnetic rolling drive mechanism is structured to turn the movable body in a predetermined angular range with the reference angular position as a center, and at least a part of the magnetic member is overlapped with the imaginary plane when the movable body is turned in the predetermined angular range. ### Claim 3 (depends on 1) The optical unit with a shake correction function according to claim 1, wherein the coil and the magnet are faced each other in the optical axis direction, and the magnetic member is located on an opposite side to the magnet with the coil interposed therebetween in the optical axis direction. ### Claim 4 (depends on 3) The optical unit with a shake correction function according to claim 3, wherein the magnetic member is disposed at a position separated from the optical axis, and a dimension in the circumferential direction of the magnetic member is longer than a dimension in a radial direction of the magnetic member. ### Claim 5 (depends on 3) The optical unit with a shake correction function according to claim 3, wherein the one of the movable body and the fixed body to which the coil is fixed comprises a fixed region to which the magnetic member is to be fixed, and a fixed position of the magnetic member is capable of being changed in the fixed region. ### Claim 6 (depends on 3) The optical unit with a shake correction function according to claim 3, further comprising a turning angle range restriction mechanism structured to restrict a turnable angular range of the movable body, wherein the turning angle range restriction mechanism comprises: a protruded part which is protruded from one of the movable body and the fixed body toward the other of the movable body and the fixed body; and an abutting part which is provided in the other of the movable body and the fixed body so as to be capable of abutting with the protruded part in the circumferential direction around the optical axis. ### Claim 7 (depends on 3) The optical unit with a shake correction function according to claim 3, wherein the magnetic rolling drive mechanism comprises a first magnetic rolling drive mechanism and a second magnetic rolling drive mechanism which are disposed at different angular positions around the optical axis, and the magnetic member comprises: a first magnetic member which is attached to the one of the movable body and the fixed body to which the coil of the first magnetic rolling drive mechanism is fixed; and a second magnetic member which is attached to the one of the movable body and the fixed body to which the coil of the second magnetic rolling drive mechanism is fixed. ### Claim 8 (depends on 1) The optical unit with a shake correction function according to claim 1, further comprising a turning angle range restriction mechanism structured to restrict a turnable angular range of the movable body, wherein the turning angle range restriction mechanism comprises: a protruded part which is protruded from one of the movable body and the fixed body toward the other of the movable body and the fixed body; and an abutting part which is provided in the other of the movable body and the fixed body so as to be capable of abutting with the protruded part in the circumferential direction around the optical axis. ### Claim 9 (depends on 8) The optical unit with a shake correction function according to claim 8, wherein the magnetic rolling drive mechanism is structured to turn the movable body in a predetermined angular range with the reference angular position as a center, and at least a part of the magnetic member is overlapped with the imaginary plane when the movable body is turned in the predetermined angular range. ### Claim 10 (depends on 1) The optical unit with a shake correction function according to claim 1, wherein the magnetic rolling drive mechanism comprises a first magnetic rolling drive mechanism and a second magnetic rolling drive mechanism which are disposed at different angular positions around the optical axis, and the magnetic member comprises: a first magnetic member which is attached to the one of the movable body and the fixed body to which the coil of the first magnetic rolling drive mechanism is fixed; and a second magnetic member which is attached to the one of the movable body and the fixed body to which the coil of the second magnetic rolling drive mechanism is fixed. ### Claim 11 (depends on 1) The optical unit with a shake correction function according to claim 1, wherein the movable body comprises: an optical module comprising the optical element; a swing support mechanism structured to swingably support the optical module; a support body which supports the optical module through the swing support mechanism; and a magnetic swing drive mechanism structured to swing the optical module; wherein the turnable support mechanism turnably supports the support body, and wherein the fixed body supports the movable body through the turnable support mechanism and the support body. ### Claim 12 (depends on 11) The optical unit with a shake correction function according to claim 11, wherein the swing support mechanism swingably supports the optical module between a reference posture in which an axial line previously set and the optical axis of the optical element are coincided with each other and a tilted posture in which the optical axis is tilted with respect to the axial line, the magnetic swing drive mechanism, which is structured between the optical module and the fixed body, comprises: a first magnetic swing drive mechanism structured to turn the optical module around a “Y”-axis perpendicular to the axial line; and a second magnetic swing drive mechanism structured to turn the optical module around an “X”-axis perpendicular to the axial line and the “Y”-axis, and the turnable support mechanism comprises: a turnable pedestal comprising a pedestal main body to which the support body is attached and a shaft part protruded from the pedestal main body in a direction of the axial line; and a bearing mechanism which turnably holds the turnable pedestal with respect to the fixed body through the shaft part. ### Claim 13 (depends on 12) The optical unit with a shake correction function according to claim 12, wherein the fixed body comprises: a tube part which holds the bearing mechanism turnably holding the shaft part protruded from the pedestal main body; and a fixing member which is provided so as to face the pedestal main body, a face of the pedestal main body which faces the fixing member holds a rolling drive coil which is the coil, and the fixing member is fixed with a rolling drive magnet which is the magnet so as to face the rolling drive coil. ### Claim 14 (depends on 13) The optical unit with a shake correction function according to claim 13, wherein the pedestal main body comprises an angular position return magnetic member which is the magnetic member on an opposite side to the rolling drive magnet with the rolling drive coil interposed therebetween in the direction of the axial line at a position where the angular position return magnetic member is overlapped with the rolling drive magnet when viewed in the direction of the axial line. ### Claim 15 (depends on 14) The optical unit with a shake correction function according to claim 14, wherein the rolling drive coil and the rolling drive magnet are respectively provided at two positions with the tube part interposed therebetween, and the angular position return magnetic member is provided at positions overlapped with the respective rolling drive magnets. ### Claim 16 (depends on 14) The optical unit with a shake correction function according to claim 14, wherein the pedestal main body comprises a fixed region to which the angular position return magnetic member is to be fixed, a fixed position of the angular position return magnetic member is capable of being changed in the fixed region, and when a state that the movable body is located at the reference angular position is viewed in the direction of the axial line, a position of the angular position return magnetic member is adjusted so that a center of the angular position return magnetic member is coincided with a magnetizing polarized line of the rolling drive magnet and the angular position return magnetic member is fixed. ### Claim 17 (depends on 14) The optical unit with a shake correction function according to claim 14, further comprising a turning angle range restriction mechanism structured to restrict a turnable angular range of the turnable pedestal, wherein the turning angle range restriction mechanism is structured so that a turning stopper protruded part is inserted into an opening part between the fixing member and the turnable pedestal. ### Claim 18 (depends on 14) The optical unit with a shake correction function according to claim 14, further comprising a turning angle range restriction mechanism structured to restrict a turnable angular range of the turnable pedestal, wherein a dimension in the circumferential direction of the angular position return magnetic member is set so that the angular position return magnetic member always faces a magnetizing polarized line of the rolling drive magnet when the turnable pedestal is turned in the turnable angular range.