JP7303699B2 - OPTICAL UNIT WITH STABILIZATION FUNCTION AND MANUFACTURING METHOD THEREOF - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical unit with a shake correction function that corrects shake by rotating an imaging module around an optical axis, and a manufacturing method thereof.

Among the optical units mounted on mobile terminals and mobile objects, in order to suppress disturbance of captured images when mobile terminals and mobile objects are moved, the movable body on which the optical module is mounted is rotated around the optical axis. Some rotate about a first axis perpendicular to the axis and about a second axis perpendicular to the optical axis and the first axis. Japanese Patent Application Laid-Open No. 2002-200002 describes this type of optical unit with a shake correction function.

The optical unit with a shake correcting function of Patent Document 1 has a movable body, a fixed body, and a rotation support mechanism that supports the movable body rotatably about a predetermined axis with respect to the fixed body. The movable body includes an optical module including a lens, a support surrounding the optical module, and a gimbal mechanism inside the support that supports the optical module rotatably about the first axis and the second axis. Prepare. Further, the optical unit with a shake correction function includes a rotating magnetic drive mechanism that rotates the optical module in the movable body about the first axis and the second axis, and the optical module that rotates the movable body about the predetermined axis. and a rolling magnetic drive mechanism for rotating around the optical axis.

JP 2015-82072 A

In the optical unit with a shake correction function of Patent Document 1, when the optical module does not rotate around the first axis or around the second axis, the rotation support mechanism rotates the movable body along a predetermined axis (rotation of the support body). axis) coincides with the optical axis. However, when the optical module rotates around the first axis or around the second axis, the rotation axis of the movable body by the rotation support mechanism and the optical axis of the optical module on the movable body are shifted. Therefore, if the magnetic drive mechanism for rolling is driven to rotate the movable body while the optical module is rotating around the first axis or around the second axis, there is a problem that the optical module does not rotate around the optical axis. .

SUMMARY OF THE INVENTION An object of the present invention is to provide an optical unit with a shake correction function that rotates a movable body around a rotation axis coinciding with the optical axis. Another object of the present invention is to propose a manufacturing method for such an optical unit with a shake correction function.

In order to solve the above-described problems, an optical unit with a shake correction function of the present invention includes a movable body having a lens, a rotation support mechanism that supports the movable body so as to be rotatable about the optical axis of the lens, and the a gimbal mechanism that supports a rotation support mechanism rotatably around a first axis intersecting the optical axis and rotatably around a second axis intersecting the optical axis and the first axis; and the gimbal mechanism. and a fixed body that supports the movable body via the rotation support mechanism; a magnetic drive mechanism for vibration correction that rotates the movable body about the first axis and the second axis; a rolling correction magnetic drive mechanism for rotating about an axis, wherein the rotation support mechanism includes a plate roll fixed to the movable body and a plate provided with a facing portion facing the plate roll in the optical axis direction. A holder and a rotation mechanism for rotating the plate roll and the plate holder are provided. and a vibration correction coil facing the vibration correction magnet, and the rolling correction magnetic drive mechanism includes the rolling correction magnet fixed to the movable body and the rolling correction magnet fixed to the fixed body and a rolling correction coil facing each other, wherein the vibration correction magnet and the rolling correction magnet are arranged in a circumferential direction around the optical axis, and the rotation mechanism includes the plate roll and the facing roll. and the plate holder is made of a magnetic material and positioned on the opposite side of the plate roll from the shake correction magnet and the rolling correction magnet. and

According to the present invention, the rotation support mechanism that supports the movable body rotatably about the optical axis is rotatably supported about the first axis and the second axis by the gimbal mechanism. Therefore, even when the movable body rotates about the first axis or the second axis, the movable body can be rotated about the rotation axis that coincides with the optical axis.

Further, in the present invention, the second connection portion that supports the gimbal frame and the fixed body rotatably about the second axis includes the second axis side shaft passing through the side plate of the fixed body and the second axis side shaft of the gimbal frame. a two-axis side concave curved surface provided on the gimbal frame extending portion and with which the second axis side shaft contacts. Further, the second axis side shaft is inserted into a through hole penetrating the side plate of the fixed body in the direction of the second axis. Therefore, by moving the second axis-side shaft in the second axis direction, it is possible to adjust the amount of protrusion of the second axis-side shaft from the side plate toward the gimbal frame extension portion. Here, if the projection amount of the second axis side shaft is increased, the second axis side gimbal frame extending portion with which the tip end of the second axis side shaft contacts can be bent. Further, by moving the second axis-side shaft in the second axis direction, it is possible to adjust the deflection amount of the second axis-side gimbal frame extending portion with which the tip end of the second axis-side shaft contacts. As a result, the biasing force with which the second-axis side gimbal frame extending portion is biased against the second-axis side shaft can be adjusted, so that the contact state between the second-axis side shaft and the second-axis side concave curved surface can be adjusted. Stabilize. Therefore, the gimbal frame that supports the movable body and the rotation support mechanism can be rotated around the second axis with high accuracy.

In the present invention, each side plate protrudes in the second axis direction from the opening edge of the through hole on the side of the plate surface on which the second axis side gimbal frame extension portion is located to support the second axis side shaft. It is desirable to have a barrel. This makes it easier to move the second shaft on the second shaft.

In the present invention, the side plate and the second shaft may be made of metal, and a contact portion between the side plate and the second shaft may have welding marks. In this way, it becomes easy to fix the second-axis-side shaft, the amount of protrusion of which is adjusted toward the second-axis-side gimbal frame extending portion, to the side plate.

In the present invention, the fixed body may include a frame surrounding the movable body, the rotation support mechanism, and the gimbal frame from the outer peripheral side, and each side plate may be provided on the frame.

In the present invention, a shake correction magnetic driving mechanism for rotating the movable body around the first axis and the second axis, and a rolling correction magnetic driving mechanism for rotating the movable body around the optical axis are provided. the shake correction magnetic drive mechanism and the rolling correction magnetic drive mechanism are arranged in a circumferential direction around the optical axis, and the shake correction magnetic drive mechanism includes the movable body and the frame A vibration correction magnet fixed to one side of the body and a vibration correction coil fixed to the other side are provided, and the rolling correction magnetic driving mechanism is a rolling correction magnetic drive mechanism fixed to one of the movable body and the frame body. A correction magnet and a rolling correction coil fixed to the other may be provided. With this configuration, the movable body can be rotated about the first axis and the second axis, and the movable body can be rotated about the optical axis.

In the present invention, the rotation support mechanism includes a plate roll fixed to the movable body, a plate holder including a facing portion that faces the plate roll in the optical axis direction, and a plate roll and the facing portion that are in contact with each other. a rotation mechanism that has a plurality of spheres that roll in a state and that allows the plate roll to rotate about the optical axis with respect to the plate holder, wherein the plate roll is The plate holder has a plate roll annular portion that overlaps with the movable body, and the plate holder includes a plate holder annular portion that faces the plate roll annular portion, and a plate holder annular portion that protrudes from the plate holder annular portion to both sides in the first axial direction to form the movable body. a pair of plate holder extending portions extending in the optical axis direction on both sides of the body in the first axial direction;
The plate holder annular portion is the facing portion, and the gimbal frame has a pair of protruding from the gimbal frame body portion on both sides in the first axial direction and extending radially outward of the pair of plate holder extension portions. A first axis-side gimbal frame extending portion is provided, and the first connection mechanism is inserted into a through hole penetrating each first axis-side gimbal frame extending portion in the first axis direction to move along the first axis. A pair of first shaft-side shafts protruding radially inward, and a first shaft-side concave curved surface provided on each plate holder extending portion with which the tip of the first shaft-side shaft contacts. can be done. With this configuration, the movable body can be rotatably supported by the rotation support mechanism. Also, the gimbal frame can support the rotation support mechanism so as to be rotatable about the first axis.

In the present invention, the first-axis-side gimbal frame extending portion includes an inclined extending portion that inclines in the optical axis direction toward the first axis direction, and a tilted extending portion extending in the optical axis direction from an end of the inclined extending portion. a connecting extension portion extending from the plate holder annular portion; the plate holder extension portion includes a plate holder first extension portion extending from the plate holder annular portion to both sides in the first axial direction; a plate holder second extending portion inclined in the optical axis direction in a direction away from the plate holder annular portion from an end on the outer peripheral side of the plate holder; a plate holder third extension portion extending in a direction, wherein the first axis side concave curved surface is provided on the plate holder third extension portion; A rib extending from the inclined extension portion to the connection extension portion may be provided on the outer surface opposite to the plate holder extension portion. By doing so, it is possible to prevent the first-axis-side gimbal frame extending portion from being excessively bent due to contact between the first-axis-side shaft and the first-axis-side concavely curved surface.

Next, according to the present invention, in the above method for manufacturing an optical unit with a shake correction function, the rotation support mechanism for rotatably supporting the movable body is connected to the gimbal frame by the first connection mechanism, and a pair of Each of the pair of second axis-side shafts is passed through each of the through holes of the side plate, the movable body, the rotation support mechanism and the gimbal frame are arranged on the inner peripheral side of the frame, The tip of the inner peripheral side of the axis-side shaft is brought into contact with the second-axis-side concave surface of each second-axis-side gimbal frame extension portion, and the load received by each second-axis-side shaft from the gimbal frame is measured. When the pair of second shafts are moved toward each other on the second shaft and the load reaches a predetermined value, the side plate and the second shaft are welded together to weld the second shaft. A special feature is that the shaft on the shaft side is fixed to the frame.

According to the present invention, when the gimbal frame and the fixed body are connected so as to be rotatable about the second axis, the second axis-side shaft passing through the through hole of the side plate of the frame body extends from the side plate to the gimbal frame extending portion. Adjust the amount of protrusion to the side. In addition, when adjusting the amount of protrusion of the second axis side shaft from the side plate toward the gimbal frame extension portion, the load received by the second axis side shaft from the gimbal frame is measured, and the load reaches a predetermined value. When it reaches, the second axis side shaft is welded and fixed to the side plate. As a result, it is possible to adjust the amount of deflection of the second-axis gimbal frame extension portion that is in contact with the second-axis side shaft. can be adjusted. In addition, since the biasing force of the second-axis side gimbal frame extension portion biasing the second-axis side shaft to the second-axis side shaft can be set to a predetermined value, there is no force between the second-axis side shaft and the second-axis side concave curved surface. contact state is stabilized. As a result, the gimbal frame supported by the fixed body can be accurately rotated around the second axis.

In the present invention, when forming the through holes in each of the pair of side plates, it is desirable to form the tubular portion by burring. In this way, it is easy to provide the cylindrical portion on the side plate.

According to the present invention, the rotation support mechanism that supports the movable body rotatably about the optical axis is rotatably supported about the first axis and the second axis by the gimbal mechanism. Therefore, even when the movable body rotates about the first axis or the second axis, the movable body can be rotated about the rotation axis that coincides with the optical axis. Further, in the second connecting portion that supports the gimbal frame and the fixed body rotatably around the second axis, by moving the second axis side shaft supported by the side plate of the fixed body in the second axial direction, It is possible to adjust the amount of protrusion of the second axis-side shaft from the side plate toward the gimbal frame extending portion. Here, if the projection amount of the second axis side shaft is increased, the second axis side gimbal frame extending portion with which the tip end of the second axis side shaft contacts can be bent. Further, by moving the second axis-side shaft in the second axis direction, it is possible to adjust the deflection amount of the second axis-side gimbal frame extending portion with which the tip end of the second axis-side shaft contacts. As a result, the biasing force with which the second-axis side gimbal frame extending portion is biased against the second-axis side shaft can be adjusted, so that the contact state between the second-axis side shaft and the second-axis side concave curved surface is stable. do. As a result, the gimbal frame supported by the movable body can be accurately rotated around the second axis.

FIG. 4 is a perspective view of an optical unit with a shake correction function; FIG. 3 is a perspective view of the optical unit with a shake correction function with the subject side cover removed; 4 is a perspective view of an optical unit main body; FIG. It is a top view at the time of seeing an optical unit main-body part from an optical axis direction. FIG. 5 is a cross-sectional view taken along line AA of FIG. 4; FIG. 5 is a cross-sectional view taken along line BB of FIG. 4; 4 is an exploded perspective view of the optical unit main body; FIG. FIG. 4 is an explanatory diagram of a movable body, a rotation support mechanism, and a gimbal mechanism; FIG. 3 is an exploded perspective view of the rotation support mechanism viewed from one side in the optical axis direction; FIG. 4 is an exploded perspective view of the rotation support mechanism viewed from the other side in the optical axis direction; 4 is an exploded perspective view of a gimbal frame and a first axis side shaft; FIG. FIG. 4 is an exploded perspective view of a case and a second shaft. 4 is a flow chart of a method for manufacturing an optical unit with a shake correction function; FIG. 4 is an explanatory diagram of a connection method between the gimbal frame and the fixed body;

An embodiment of an optical unit with a shake correction function to which the present invention is applied will be described below with reference to the drawings.

(overall structure)
FIG. 1 is a perspective view of an optical unit with a shake correction function. FIG. 2 is a perspective view of the optical unit with a shake correction function with the subject side cover removed. FIG. 3 is a perspective view of the optical unit main body. FIG. 4 is a plan view when the optical unit main body is viewed from the optical axis direction. FIGS. 3 and 4 omit the first flexible printed circuit board, the second flexible printed circuit board, and the third flexible printed circuit board drawn out from the optical unit main body. 5 is a cross-sectional view taken along the line AA of FIG. 4. FIG. 6 is a cross-sectional view taken along the line BB of FIG. 4. FIG. FIG. 7 is an exploded perspective view of the optical unit main body.

As shown in FIGS. 1 and 2, the optical unit 1 with a shake correction function includes a rectangular parallelepiped cover 2 and an optical unit main body 3 housed in the cover 2 . The optical unit main body 3 has an imaging module 5 having a lens 4 and an imaging element 9 (see FIG. 8). A first flexible printed circuit board 6 and a second flexible printed circuit board 7 are pulled out in parallel from the cover 2 . Further, the third flexible printed circuit board 8 is pulled out from the cover 2 in a direction different from the direction in which the first flexible printed circuit board 6 and the second flexible printed circuit board 7 are pulled out.

The optical unit 1 with a shake correction function is used, for example, in optical equipment such as camera-equipped mobile phones and drive recorders, and in optical equipment such as action cameras and wearable cameras mounted on mobile objects such as helmets, bicycles, and radio-controlled helicopters. . In such an optical device, if the optical device shakes during shooting, the captured image is disturbed. The optical unit 1 with a shake correction function corrects the inclination of the imaging module 5 based on acceleration, angular velocity, amount of shake, etc. detected by a detection means such as a gyroscope, in order to avoid inclination of the photographed image.

In the optical unit 1 with a shake correction function of this example, the optical axis L of the lens 4, the first axis R1 orthogonal to the optical axis L, and the second axis R2 orthogonal to the optical axis L and the first axis R1 Then, the imaging module 5 is rotated to perform shake correction.

In the following description, the three mutually orthogonal axes are the X-axis direction, the Y-axis direction, and the Z-axis direction. One side of the X-axis direction is assumed to be the -X direction, and the other side thereof is assumed to be the +X direction. One side of the Y-axis direction is the -Y direction, and the other side is the +Y direction. One side in the Z-axis direction is the -Z direction, and the other side is the +Z direction. The X-axis direction is the longitudinal direction of the cover 2 , and the Y-axis direction is the lateral direction of the cover 2 . The first flexible printed circuit board 6 and the second flexible printed circuit board 7 are pulled out from the cover 2 in the +X direction. The third flexible printed board 8 is pulled out from the cover 2 in the -Y direction. The Z-axis direction is the optical axis direction along the optical axis L. As shown in FIG. The −Z direction is the image side of the imaging module 5 and the +Z direction is the object side of the imaging module 5 . The first axis R1 and the second axis R2 are inclined 45 degrees with respect to the X axis and the Y axis around the Z axis (around the optical axis L).

As shown in FIG. 2, the cover 2 includes a plate-shaped image side cover 10 that covers the optical unit main body 3 from the -Z direction. Further, as shown in FIG. 1, the cover 2 includes a subject-side cover 11 that covers the image-side cover 10 from the +Z direction. The subject-side cover 11 includes a frame-shaped first cover 12 that covers the optical unit main body 3 from the outer peripheral side, and a box-shaped second cover 13 positioned in the +X direction of the first cover 12 . The second cover 13 partially covers the first flexible printed circuit board 6 and the second flexible printed circuit board 7 pulled out from the optical unit main body 3 in the +X direction.

As shown in FIG. 2 , each of the first flexible printed circuit board 6 and the second flexible printed circuit board 7 has a bent portion 15 at a portion covered with the second cover 13 . The bent portion 15 includes a first bent portion 16 that extends along the XY plane and bends in the Z-axis direction, a second bent portion 17 that bends in the X-axis direction along the YZ plane, and a Y-axis along the XZ plane. and a third bent portion 18 that bends in a direction. A plurality of second bent portions 17 are provided in the X-axis direction to form a zigzag fold. The flexible printed circuit board is fixed to the +X direction end portion of the image side cover 10 via a reinforcing plate 19 at the +X direction end portion of the bent portion 15 .

As shown in FIGS. 3, 4, and 7, the optical unit main body 3 includes a movable body 20 having an imaging module 5, and a rotation support mechanism 21 that supports the movable body 20 so as to be rotatable around the optical axis L. , provided. The optical unit main body 3 also supports the rotation support mechanism 21 rotatably around the first axis R1 and supports the rotation support mechanism 21 rotatably around the second axis R2. and a fixed body 23 that supports the movable body 20 via the mechanism 21 . Movable body 20 is supported by fixed body 23 via rotation support mechanism 21 and gimbal mechanism 22 so as to be rotatable about first axis R1 and second axis R2. The movable body 20 rotates about the X-axis and the Y-axis by synthesizing rotation about the first axis R1 and rotation about the second axis R2. Thereby, the optical unit 1 with a shake correction function performs pitching correction about the X-axis, yawing correction about the Y-axis, and rolling correction about the Z-axis.

The optical unit main body 3 also includes a correction magnetic drive mechanism 25 that rotates the movable body 20 around the first axis R1 and the second axis R2. The correction magnetic drive mechanism 25 includes a first vibration correction magnetic drive mechanism 26 that generates a driving force around the X-axis for the movable body 20 and a second magnetic drive mechanism 26 that generates a drive force for the movable body 20 around the Y-axis. and a magnetic drive mechanism 27 for two-shake correction. The first shake correction magnetic drive mechanism 26 is arranged in the -Y direction of the imaging module 5 . The second shake correction magnetic drive mechanism 27 is arranged in the −X direction of the imaging module 5 . Further, the optical unit main body 3 has a rolling correction magnetic drive mechanism 28 that rotates the movable body 20 around the optical axis L. As shown in FIG. The rolling correction magnetic driving mechanism 28 is arranged in the +Y direction of the imaging module 5 .

The first shake correction magnetic drive mechanism 26, the first shake correction magnetic drive mechanism 27, and the rolling correction magnetic drive mechanism 28 are arranged in the circumferential direction around the optical axis L. As shown in FIG. When viewed from a direction perpendicular to the optical axis L, the rolling correction magnetic drive mechanism 28 overlaps the correction magnetic drive mechanism 25 . In this example, the rolling correction magnetic drive mechanism 28 and the first shake correction magnetic drive mechanism 26 are arranged at positions facing each other with the optical axis L interposed therebetween.

Here, as shown in FIG. 2 , the third flexible printed circuit board 8 is routed along the outer peripheral surface of the optical unit main body 3 . Further, the third flexible printed circuit board 8 is pulled out from the outer peripheral surface of the optical unit main body 3 in the -Y direction.

(movable body)
8A and 8B are explanatory diagrams of the movable body 20, the rotation support mechanism 21, and the gimbal mechanism 22. FIG. As shown in FIG. 8, the movable body 20 includes the imaging module 5 and a frame-shaped holder 29 surrounding the imaging module 5 from the outer peripheral side. The imaging module 5 includes an imaging module main body 30 and a cylindrical portion 31 protruding from the center of the imaging module main body 30 in the +Z direction. The cylindrical portion 31 accommodates the lens 4 . The cylindrical portion 31 is coaxial with the optical axis L and extends in the optical axis L direction with a constant outer diameter. An imaging device 9 is accommodated in the imaging module main body 30 . The imaging device 9 is located on the optical axis L of the lens 4 in the −Z direction of the lens 4 . Here, the holder 29 and the imaging module main body 30 located radially inward of the holder 29 and the holder 29 in the imaging module 5 constitute a movable body main body 32 . The cylindrical portion 31 of the imaging module 5 constitutes a movable body protruding portion 33 that protrudes in the +Z direction from the center of the movable body main body portion 32 .

As shown in FIG. 8, the shape of the movable body main body 32 when viewed from above is substantially octagonal. The movable body main portion 32 includes a first side wall 35 and a second side wall 36 extending parallel to the Y direction, and a third side wall 37 and a fourth side wall 38 extending parallel to the X direction. The first sidewall 35 is positioned in the -X direction of the second sidewall 36 . The third sidewall 37 is positioned in the -Y direction of the fourth sidewall 38 . In addition, the movable body main portion 32 includes a fifth side wall 39 and a sixth side wall 40 positioned diagonally in the direction of the first axis R1, and a seventh side wall 41 and an eighth side wall positioned diagonally in the direction of the second axis R2. 42. The fifth side wall 39 is positioned in the −X direction of the sixth side wall 40 . The seventh sidewall 41 is positioned in the -Y direction of the eighth sidewall 42 .

A first magnet 45 (shake correction magnet) is fixed to the first side wall 35 of the movable body 20 via a plate-shaped first yoke 44 made of a magnetic material. The first magnet 45 is divided into two in the Z-axis direction. A second magnet 47 (shake correction magnet) is fixed to the third side wall 37 of the movable body 20 via a plate-shaped second yoke 46 made of a magnetic material. The first magnet 45 and the second magnet 47 are arranged with the same pole directed in the Z-axis direction. The second magnet 47 is divided into two in the Z-axis direction. A third magnet 49 (rolling correction magnet) is fixed to the fourth side wall 38 of the movable body 20 via a plate-shaped third yoke 48 made of a magnetic material. The third magnet 49 is divided into two in the circumferential direction.

Here, the first magnet 45 and the second magnet 47 are vibration correction magnets of the vibration correction magnetic driving mechanism 25 that rotates the movable body 20 around the first axis R1 and the second axis R2. The anti-shake magnetic drive mechanism 25 includes, as anti-shake magnets, a first magnet 45 and a second magnet 47 arranged in the circumferential direction with the first axis R1 interposed therebetween. The third magnet 49 is a rolling correction magnet of the rolling correction magnetic drive mechanism 28 that rotates the movable body around the optical axis L. As shown in FIG. The third magnet 49 is arranged on the opposite side of the second magnet 47 with the optical axis L interposed therebetween.

(rotation support mechanism)
FIG. 9 is an exploded perspective view of the rotation support mechanism 21 viewed from the +Z direction. FIG. 10 is an exploded perspective view of the rotation support mechanism 21 viewed from the -Z direction. 9 and 10, the rotation support mechanism 21 includes a plate roll 51 fixed to the movable body 20, a plate holder 52 having a facing portion 56 facing the plate roll 51 in the Z-axis direction, a plate roll 51 and the plate holder 52 are provided with a rotation mechanism 53 that can rotate around the optical axis L. As shown in FIG. The rotation support mechanism 21 also includes a first pressurizing mechanism 54 and a second pressurizing mechanism 55 that urge the plate roll 51 toward the plate holder 52 .

The plate roll 51 is made of metal and non-magnetic material. The plate roll 51 includes a plate roll annular portion 57 surrounding the optical axis L, and a pair of plate roll extension portions 58 projecting from the plate roll annular portion 57 to both sides in the second axis R2 direction and extending in the -Z direction. . The plate roll annular portion 57 includes a plate roll annular plate 59 and a plate roll annular wall 60 (inner wall) that extends from the inner peripheral edge of the plate roll annular plate 59 while being bent in the +Z direction. The plate roll annular wall 60 is cylindrical in shape. As shown in FIG. 9 , a plate roll annular groove 61 is provided in the radial center of the +Z direction end surface of the plate roll annular plate 59 . Pressurizing magnets 62 are fixed to the plate roll annular plate 59 at three locations in the circumferential direction at equal angular intervals.

Each of the pair of plate roll extension portions 58 has a fixing portion 63 fixed to the movable body 20 at the end portion in the -Z direction. The fixed portion 63 has a plurality of wedge-shaped protrusions 63a on both circumferential ends thereof, the width of which increases in the +Z direction. In addition, the fixed portion 63 has a rectangular protrusion 63b on its outer surface in the direction of the second axis R2. The rectangular protrusion 63b increases in the amount of protrusion in the direction of the second axis R2 toward the +Z direction.

The plate holder 52 is made of magnetic material. The plate holder 52 includes a plate holder annular portion 65 and a pair of plate holder extension portions 66 that protrude from the plate holder annular portion 65 toward both sides in the direction of the first axis R1 and extend in the -Z direction. The plate holder annular portion 65 is a facing portion 56 that faces the plate roll annular portion 57 in the Z-axis direction in the plate holder 52 .

The plate holder annular portion 65 includes a plate holder annular plate 67 positioned in the +Z direction of the plate roll annular portion 57, and a plurality of plate holder arc walls 68 ( outer wall); As shown in FIG. 10, a plurality of plate holder arcuate grooves 70 extending in the circumferential direction are provided on the end surface of the plate holder annular plate 67 in the -Z direction. In this example, six plate holder arcuate grooves 70 are provided at equal angular intervals. Each plate holder arcuate groove 70 faces the plate roll annular groove 61 in the Z-axis direction.

The pair of plate holder extension portions 66 includes a plate holder first extension portion 66a extending from the plate holder annular portion 65 to both sides in the direction of the first axis R1, and an outer peripheral side end of the plate holder first extension portion 66a. , the plate holder second extending portion 66b inclined in the -Z direction toward the direction away from the plate holder annular portion 65, and the outer periphery of the movable body 20 from the -Z direction end of the plate holder second extending portion 66b. and a plate holder third extension portion 66c extending in the -Z direction. As shown in FIG. 5, the plate holder first extension portions 66a protrude in the first axis R1 direction from the -Z direction ends of the plate holder arcuate walls 68 positioned on both sides in the first axis R1 direction. A plate holder third extension portion 66c of one plate holder extension portion 66 faces the fifth side wall 39 of the movable body 20 with a slight gap in the direction of the first axis R1. The plate holder third extension portion 66c of the other plate holder extension portion 66 faces the sixth side wall 40 of the movable body 20 with a slight gap in the direction of the first axis R1. Each plate holder third extension portion 66c has a first axis side concave curved surface 69 that is recessed radially inward (toward the movable body 20) along the first axis R1 line.

As shown in FIGS. 9 and 10, the rotating mechanism 53 includes a plurality of spheres 71 and a retainer 72. As shown in FIG. The sphere 71 is made of metal. The retainer 72 is made of resin. The retainer 72 includes a plurality of sphere holding holes 72a that hold each of the plurality of spheres 71 in a rollable manner. In this example, the rotation mechanism 53 has six spheres 71 . Accordingly, the retainer 72 is provided with six sphere holding holes 72a. The sphere 71 is held in the sphere holding hole 72a and protrudes from the retainer 72 in the -Z and +Z directions. In this example, each sphere holding hole 72a is an elongated hole that is longer in the circumferential direction than in the radial direction. When the sphere 71 is positioned in the center of the sphere holding hole 72a, the retainer 72 has an outer retainer portion 72b positioned on the outer peripheral side of the sphere holding hole 72a and the sphere 71, and the inner circumference of the sphere holding hole 72a in the retainer. A gap is provided between the inner retainer portion 72c located on the side and the sphere 71 .

The retainer 72 has an outer protrusion 73 protruding outward from an outer retainer portion 72b positioned radially outward of each ball holding hole 72a, and an inner retainer portion 72c positioned radially inside each ball holding hole 72a. and an inner protruding portion 74 protruding to the peripheral side. Further, the retainer 72 is provided with retainer through holes 75 penetrating in the Z-axis direction at three locations in the circumferential direction.

Here, as shown in FIG. 8, the plate roll 51 and the plate holder 52 are overlapped in the Z-axis direction with the plate roll annular wall 60 inserted into the plate holder annular portion 65 from the -Z direction. The end portion of the plate roll annular wall 60 in the +Z direction protrudes further in the +Z direction than the plate holder annular portion 65 . When the plate roll 51 and plate holder 52 are stacked, each sphere 71 and retainer 72 are positioned between the plate holder annular portion 65 and the plate roll annular portion 57 .

When the retainer 72 is arranged between the plate holder annular portion 65 and the plate roll annular portion 57, as shown in FIG. Further, the plate roll annular wall 60 comes into contact with the inner projecting portion 74 from the radially inner side. Thereby, the retainer 72 is radially positioned between the plate holder annular portion 65 and the plate roll annular portion 57 . Each sphere 71 accommodated in each sphere holding hole 72a of the retainer 72 has its −Z direction end portion inserted into the plate roll annular groove 61, and its +Z direction end portion inserted into the plate holder arcuate groove 70. . Furthermore, in a state where the retainer 72 is arranged between the plate holder annular portion 65 and the plate roll annular portion 57 , the pressurizing magnet 62 is inserted into the retainer through-hole 75 .

As shown in FIGS. 5 and 8, an annular plate member 77 is fixed to the end of the plate roll annular wall 60 in the +Z direction. When viewed from the direction of the optical axis L, the outer peripheral side portion of the plate member 77 and the inner peripheral side end portion of the plate holder annular portion 65 overlap. A slight gap is formed in the Z-axis direction between the plate member 77 and the plate holder annular portion 65 . Here, the pressurizing magnet 62 fixed to the plate roll annular portion 57 and inserted into the retainer through hole 75 attracts the plate holder 52 made of a magnetic material in a direction approaching the plate holder 52 . That is, the pressurizing magnet 62 constitutes a first pressurizing mechanism 54 that urges the plate roll 51 in a direction to approach the plate holder 52 .

Here, as shown in FIGS. 6 and 8, the movable body 20 receives the fixing portions 63 of the pair of plate roll extending portions 58 at both end portions of the movable body body portion 32 in the direction of the second axis R2. A plate roll fixing hole 79 is provided. A plate roll fixing hole 79 is provided in the holder 29 . The plate roll fixing hole 79 is parallel to the seventh side wall 41 and the eighth side wall 42 and extends in the -Z direction.

The rotation support mechanism 21 is fixed to the movable body 20 by press-fitting the fixing portions 63 of the plate roll extension portions 58 of the plate roll 51 into the plate roll fixing holes 79 . When inserting the fixing portion 63 into the plate roll fixing hole 79 , the movable body projecting portion 33 is inserted into the plate roll annular wall 60 . As a result, the movable body protruding portion 33 (cylindrical portion 31) is fitted into the plate roll annular wall 60, so that the plate roll 51 is positioned coaxially with the optical axis L, and the movable body 20 is moved. fixed to When the fixing portion 63 of each plate roll extension portion 58 is press-fitted into each plate roll fixing hole 79, the projections 63a and 63b of the fixing portion 63 are plastically deformed and crushed. Thereby, the plate roll 51 and the movable body 20 are fixed. When the plate roll 51 and the movable body 20 are fixed, the movable body 20 becomes rotatable around the optical axis L together with the plate roll 51 .

Here, when the plate roll 51 of the rotation support mechanism 21 and the movable body 20 are fixed, the plate holder 52 made of a magnetic material attaches the first magnet 45 , the second magnet 47 and the third magnet 47 to the plate roll 51 . The magnet 49 is located on the opposite side. In other words, the plate holder annular portion 65 is located on the opposite side of the first magnet 45 , the second magnet 47 and the third magnet 49 with the plate roll annular portion 57 interposed therebetween in the Z-axis direction. As a result, the first magnet 45 , the second magnet 47 , and the third magnet 49 attract the plate holder annular portion 65 toward the plate roll annular portion 57 . Therefore, the first magnet 45 , the second magnet 47 and the third magnet 49 constitute a second pressurizing mechanism 55 that urges the plate roll 51 toward the plate holder 52 . In this example, the first magnet 45, the second magnet 47, and the third magnet 49 attract the plate holder annular portion 65 in a direction approaching the plate roll annular portion 57, thereby causing the movable body 20 and the plate roll 51 to move. is attracted in the +Z direction toward the plate holder annular portion 65 side.

(Gimbal mechanism)
FIG. 11 is an exploded perspective view of the gimbal frame and the first axis side shaft. As shown in FIG. 4, the gimbal mechanism 22 includes a gimbal frame 80 and a first connection mechanism 81 that connects the gimbal frame 80 and the plate holder 52 rotatably around the first axis R1. The gimbal mechanism 22 also includes a second connection mechanism 82 that connects the gimbal frame 80 and the fixed body 23 rotatably about the second axis R2. As shown in FIGS. 5 and 7, the first connection mechanism 8
1, a first axis-side shaft 83 protruding from the gimbal frame 80 along the first axis R1 toward the plate holder 52 side, and the tip of the first axis-side shaft 83 provided in the plate holder 52 are rotatably in contact with each other. and a first axis-side concave surface 69 . As shown in FIGS. 6 and 7, the second connection mechanism 82 is provided on the gimbal frame 80 and a second axis side shaft 84 projecting from the fixed body 23 along the second axis R2 toward the gimbal frame 80 side. a second axis side concave curved surface 95 with which the tip of the second axis side shaft 84 contacts.

(gimbal frame)
The gimbal frame 80 is made of a metal leaf spring. As shown in FIG. 8, the gimbal frame 80 includes a gimbal frame main body portion 85 positioned in the +Z direction of the plate holder 52, and a gimbal frame main body portion 85 protruding toward both sides in the direction of the first axis R1 from the -Z direction. and a pair of second-axis gimbal frame extensions that protrude from the gimbal frame main body 85 toward both sides in the second axis R2 direction and extend in the -Z direction. a portion 87; The gimbal frame main body 85 includes a substantially rectangular central plate portion 85a extending in the direction of the first axis R1, and one side of the central plate portion 85a in the direction of the second axis R2 (-Y direction side) toward the outer peripheral side. A first inclined plate portion 85b inclined in the +Z direction, and a second inclined plate portion 85c inclined in the +Z direction from the other side (+Y direction side) of the central plate portion 85a in the direction of the second axis R2 toward the outer peripheral side. , provided. Also, the gimbal frame main body 85 has an opening 90 penetrating in the Z-axis direction in the center. The movable body protrusion 33 is inserted into the opening 90 .

As shown in FIGS. 5, 7, and 8, the pair of first-axis-side gimbal frame extensions 86 are positioned on the outer peripheral side of the plate holder 52. As shown in FIGS. As shown in FIG. 8, each of the pair of first-axis-side gimbal-frame extension portions 86 is a first-axis-side gimbal-frame extension portion extending in the direction of the first axis R1 away from the gimbal frame main body portion 85. 1 extending portion 86a and the first axis-side gimbal frame extending portion extending from the tip of the first extending portion 86a, the direction of the first axis R1 is inclined in the −Z direction toward the direction away from the gimbal frame main body portion 85. From the -Z direction end of the 1st axis side gimbal frame extension part second extension part 86b (inclined extension part) and the 1st axis side gimbal frame extension part second extension part 86b to the outer circumference side of the plate holder 52 and a first-axis-side gimbal frame extension portion third extension portion 86c (connection extension portion) extending in the -Z direction.

As shown in FIGS. 5 and 8, the first axis-side gimbal frame extension portion first extension portion 86a protrudes from the central plate portion 85a in the direction of the first axis R1. The first axis-side gimbal frame extension portion third extension portion 86c includes a gimbal frame extension portion through-hole 92 penetrating in the direction of the first axis R1. The third extension portion 86c of the first-axis-side gimbal-frame extension portion is a first-axis-side shaft-supporting cylinder that protrudes outward in the direction of the first axis R1 from the opening edge of the gimbal-frame extension portion through-hole 92. A portion 93 is provided. Further, the first-axis-side gimbal-frame extension third extension portion 86c includes a pair of gimbal-frame extension projections 94 projecting inwardly from both edges in the circumferential direction. The pair of gimbal frame extension projections 94 is provided on the +Z direction side of the gimbal frame extension through-hole 92 in the first axis side gimbal frame extension third extension 86c. Further, on the outer surface of the first axis side gimbal frame extension part 86 opposite to the plate holder extension part 66, the first axis side gimbal A rib 91 is provided that extends to the third extension portion 86c of the frame extension portion. The rib 91 extends through a bent portion between the first axis-side gimbal frame extension portion second extension portion 86b and the first axis side gimbal frame extension portion third extension portion 86c.

Here, the first axis side shaft 83 has a columnar shape, is inserted into the gimbal frame extension portion through-hole 92 and the first axis side shaft supporting cylindrical portion 93 and is held by the gimbal frame 80 . As a result, the first axis-side shaft 83 extends along the first axis R1 in the direction of the first axis R1. The inner peripheral side end of the first axis side shaft 83 protrudes from the first axis side gimbal frame extension part third extension part 86c toward the plate holder extension part 66 side. An end portion on the inner peripheral side of the first shaft side shaft 83 has a hemispherical surface.

Next, as shown in FIG. 8, each of the pair of second-axis-side gimbal-frame extending portions 87 is a second-axis-side gimbal-frame extending portion extending in the direction of the second axis R2 away from the gimbal-frame main body portion 85. From the end of the installation portion first extension portion 87a and the second axis side gimbal frame extension portion first extension portion 87a, the first axis R1 direction moves away from the gimbal frame main body portion 85 in the -Z direction. From the end in the -Z direction of the inclined second-axis-side gimbal-frame extension second extension portion 87b and the second-axis-side gimbal-frame extension second extension portion 87b, move the outer peripheral side of the movable body 20 to -Z and a third extension portion 87c of the second axis side gimbal frame extension portion extending in the direction. The second-axis-side gimbal-frame extension first extension portion 87a of one of the second-axis-side gimbal-frame extension portions 87 positioned in the −Y direction extends from the outer peripheral edge of the first inclined plate portion 85b to the first extension portion 87a. It protrudes in the two-axis R2 direction. The second-axis-side gimbal-frame extension first extension portion 87a of one of the second-axis-side gimbal-frame extension portions 87 positioned in the +Y direction extends from the outer peripheral edge of the second inclined plate portion 85c to the second tilt plate portion 85c. It protrudes in the direction of the axis R2. Each second-axis-side gimbal-frame extension third extension portion 87c has a second-axis-side concave curved surface 95 recessed inwardly above the second axis R2.

(First connection mechanism)
As shown in FIG. 7 , the pair of plate holder extensions 66 are positioned between the pair of first axis side gimbal frame extensions 86 and the movable body 20 . The third extension portion 86c of the first axis side gimbal frame extension portion holding the first axis side shaft 83 and the third extension portion 66c of the plate holder including the first axis side concave surface 69 are connected to the first axis side shaft 83. They face each other on the axis R1. The first connection mechanism 81 is configured by contacting the first axis side concave curved surface 69 with the tip of the first axis side shaft 83 protruding inwardly from the first axis side gimbal frame extending portion 86 . In this example, the first axis side shaft 83 and the first axis side concave curved surface 69 are in point contact. Thereby, the rotation support mechanism 21 is supported by the gimbal frame 80 via the first connection mechanism 81 so as to be rotatable about the first axis R1. Accordingly, the movable body 20 supported by the rotation support mechanism 21 is rotatably supported by the gimbal mechanism 22 around the first axis R1. When the first-axis side shaft 83 is in contact with the first-axis side concave curved surface 69 , each plate holder extension portion 66 is connected to the pair of gimbal frame extension portions provided on each first-axis side gimbal frame extension portion 86 . located inside the projection 94 .

When the movable body 20 and the rotation support mechanism 21 are supported by the gimbal mechanism 22, the gimbal frame main body 85, the plate roll annular part 57, and the plate holder annular part 65 are movable in the +Z direction of the movable body main body 32. It is positioned on the outer peripheral side of the body projecting portion 33 . The plate roll annular portion 57 is positioned between the gimbal frame main body portion 85 and the movable body main body portion 32 in the Z-axis direction. Also, the plate holder annular portion 65 is positioned in the +Z direction of the plate roll annular portion 57 and between the gimbal frame main body portion 85 and the movable body main body portion 32 in the Z-axis direction. Here, the plate roll annular portion 57 and the plate holder annular portion 65 are located in the +Z direction from the first axis R1 and the second axis R2. Also, the gimbal frame main body 85 , the plate roll annular portion 57 , and the plate holder annular portion 65 are positioned in the +Z direction from the imaging element 9 .

(fixed body)
FIG. 12 is an exploded perspective view of the case and the second shaft. As shown in FIG. 7, the fixed body 23 has a frame-shaped case 97 (frame body) surrounding the movable body 20 and the rotation support mechanism 21 from the outer peripheral side. The case 97 is made of metal and non-magnetic material. The shape of the case 97 when viewed from the Z-axis direction is an octagon. As shown in FIG. 12 , the case 97 includes an octagonal frame-shaped plate portion 98 and a frame portion 99 located radially outside the movable body main portion 32 . The frame portion 99 is bent from the outer peripheral edge of the frame-shaped plate portion 98 and extends in the -Z direction.

The frame-shaped plate portion 98 has a constant thickness in the Z-axis direction. The frame portion 99 has a constant thickness in the direction perpendicular to the optical axis L. As shown in FIG. The frame-shaped plate portion 98 and the frame portion 99 have the same thickness. That is, the case 97 is formed by punching out a piece of sheet metal to form a case base material in a developed shape obtained by developing the case 97 on a plane, then bending the case base material into a three-dimensional shape, and then welding necessary portions. formed by A rectangular opening 98 a is provided in the center of the frame-shaped plate portion 98 . When viewed from the Z-axis direction, the holder 29 of the movable body 20 is located on the inner peripheral side of the opening 98a.

The frame portion 99 includes a first side plate 101 and a second side plate 102 extending parallel to the Y direction, and a third side plate 103 and a fourth side plate 104 extending parallel to the X direction. The first side plate 101 is positioned in the -X direction of the second side plate 102 . The third side plate 103 is positioned in the -Y direction of the fourth side plate 104 . In addition, the frame portion 99 connects the fifth side plate 105 connecting the first side plate 101 and the third side plate 103 and the second side plate 102 and the fourth side plate 104 at the diagonals in the direction of the first axis R1. A sixth side plate 106 is provided. The fifth side plate 105 and the sixth side plate 106 extend parallel. Further, the frame portion 99 connects the seventh side plate 107 that connects the first side plate 101 and the fourth side plate 104, and the second side plate 102 and the third side plate 103, at diagonal angles in the direction of the second axis R2. An eighth side plate 108 is provided. The seventh side plate 107 and the eighth side plate 108 extend parallel.

As shown in FIGS. 7 and 12 , the frame portion 99 has a first coil holding opening 109 in the first side plate 101 . A first coil 110 (vibration correction coil) is inserted into the first coil holding opening 109 . The first coil 110 has an elliptical shape elongated in the circumferential direction, and the center hole is oriented in the radial direction. The frame portion 99 also includes a second coil holding opening 111 in the third side plate 103 . A second coil 112 (vibration correction coil) is inserted into the second coil holding opening 111 . The second coil 112 has an elliptical shape elongated in the circumferential direction, and the center hole is oriented in the radial direction. Further, the frame portion 99 has a third coil holding opening 113 in the fourth side plate 104 . A third coil 114 (rolling correction coil) is inserted into the third coil holding opening 113 . The third coil 114 has an elliptical shape elongated in the Z-axis direction, and the center hole is directed radially. Here, as shown in FIG. 2, the third flexible printed circuit board 8 is routed along the outer peripheral surfaces of the fourth side plate 104, the first side plate 101 and the third side plate 103. As shown in FIG. The first coil 110 , the second coil 112 and the third coil 114 are electrically connected to the third flexible printed board 8 .

Further, the second side plate 102 is provided with a rectangular notch 115 extending in the +Z direction from the end in the -Z direction. The first flexible printed circuit board 6 and the second flexible printed circuit board 7 connected to the imaging module 5 are pulled out in the +X direction from the optical unit main body 3 via the notch 115 .

As shown in FIG. 12, the seventh side plate 107 and the eighth side plate 108 of the case 97 are each provided with a through hole 117 penetrating in the direction of the second axis R2. The seventh side plate 107 and the eighth side plate 108 protrude in the direction of the second axis R2 from the opening edge of the through hole 117 on the inner surface (the surface on which the second axis-side gimbal frame extending portion 87 is located). A barrel portion 118 is provided. A second axis-side shaft 84 passes through each through hole 117 of the seventh side plate 107 and the eighth side plate 108 . The second axis-side shaft 84 has a cylindrical shape, is inserted into the through hole 117 , and is supported by the cylindrical portion 118 .

The second shaft side shaft 84 is made of metal and fixed to each of the seventh side plate 107 and the eighth side plate 108 by welding. Therefore, a contact portion between the second shaft 84 and the seventh side plate 107 is provided with a welding mark 120 for fixing the second shaft 84 to the seventh side plate 107. At the contact portion of the eighth side plate 108, the second shaft side shaft 8
4 and the eighth side plate 108 are provided. As shown in FIGS. 6 and 7, each weld mark 120 is formed on the opening edge of the through hole 117 on the outer surface of the seventh side plate 107 and the opening edge of the through hole 117 on the outer surface of the eighth side plate 108. . A second shaft side shaft 84 fixed to each of the seventh side plate 107 and the eighth side plate 108 extends along the second axis R2 in the direction of the second axis R2. An end portion on the inner peripheral side of the second shaft side shaft 84 protrudes from the frame portion 99 to the inner peripheral side. An end portion on the inner peripheral side of the first shaft side shaft 83 has a hemispherical surface.

(Second connection mechanism)
As shown in FIG. 6, the second connection mechanism 82 has the movable body 20, the rotation support mechanism 21 and the gimbal frame 80 arranged inside the case 97, and the tip portion of the second axis side shaft 84 is connected to the second axis side gimbal. It is constructed by inserting into the second shaft side concave curved surface 95 of the third extending portion 87c of the frame extending portion and bringing it into contact therewith. By connecting the fixed body 23 and the gimbal frame 80 by the second connection mechanism 82, the gimbal frame 80, the rotation support mechanism 21 and the movable body 20 are rotatable about the second axis R2. supported by

Here, since the gimbal frame 80 is a leaf spring, the second-axis-side gimbal-frame extending portion 87 is elastically deformable in the direction of the second axis R2. Therefore, when the second axis side shaft 84 and the second axis side concave curved surface 95 of the second axis side gimbal frame extension part 87 are brought into contact with each other, the second axis side gimbal frame extension part 87 is bent inward. state. As a result, the second-axis-side gimbal frame extending portion 87 elastically contacts the second-axis-side shaft 84 from the inner peripheral side due to the elastic restoring force toward the outer peripheral side. Therefore, it is possible to prevent or suppress disconnection between the second axis side gimbal frame extension portion 87 and the frame portion 99 .

(Magnetic Drive Mechanism for Shake Correction and Magnetic Drive Mechanism for Rolling Correction)
When the movable body 20 supported by the gimbal mechanism 22 is arranged on the inner peripheral side of the case 97, the first side wall 35 of the holder 29 and the first side plate 101 of the frame portion 99 are spaced apart in the X-axis direction. opposite. The second side wall 36 of the holder 29 and the second side plate 102 face each other with a gap in the X-axis direction. The third side wall 37 of the holder 29 and the third side plate 103 face each other with a gap in the Y-axis direction. The fourth side wall 38 and the fourth side plate 104 of the holder 29 face each other with a gap in the Y-axis direction, and the fifth side wall 39 and the fifth side plate 105 of the holder 29 face each other with a gap in the direction of the first axis R1. to face each other. The sixth side wall 40 and the sixth side plate 106 of the holder 29 are opposed to each other with a gap in the direction of the first axis R1. The seventh side wall 41 of the holder 29 and the seventh side plate 107 face each other with a gap in the direction of the second axis R2. The eighth side wall 42 of the holder 29 and the eighth side plate 108 face each other with a gap in the direction of the second axis R2.

As a result, as shown in FIG. 3, the first magnet 45 fixed to the first side wall 35 of the movable body 20 and the first coil 110 held by the case 97 face each other with a gap in the X direction. The first magnet 45 and the first coil 110 constitute the second shake correction magnetic drive mechanism 27 . Therefore, by supplying power to the first coil 110, the movable body 20 rotates around the Y-axis. Also, the second magnet 47 fixed to the third side wall 37 of the movable body 20 and the second coil 112 face each other with a gap in the Y direction. The second magnet 47 and the second coil 112 constitute the first magnetic drive mechanism 26 for shake correction. Therefore, by supplying power to the second coil 112, the movable body 20 rotates around the X axis. The shake correction magnetic drive mechanism 25 rotates the movable body 20 around the Y axis by the first shake correction magnetic drive mechanism 26 and rotates the movable body 20 around the X axis by the first shake correction magnetic drive mechanism 27 . , are combined to rotate the movable body 20 around the first axis R1 and around the second axis R2.

Further, when the movable body 20 is arranged on the inner peripheral side of the case 97, the third magnet 49 fixed to the fourth side wall 38 of the movable body 20 and the third coil 114 face each other with a gap in the Y direction. do. The third magnet 49 and the third coil 114 are connected to the magnetic driving mechanism 2 for rolling correction.
8. Therefore, the movable body 20 rotates around the optical axis L by supplying power to the third coil 114 .

As shown in FIGS. 3 and 4, a first magnetic plate 123 is arranged on the side of the first coil 110 opposite to the movable body 20 . That is, the first magnetic plate 123 is arranged on the side opposite to the movable body 20 with respect to the first coil 110 in the radial direction of the optical axis L. As shown in FIG. The first magnetic plate 123 has a rectangular shape elongated in the Z-axis direction, and is arranged at a position overlapping the center of the first coil 110 in the Z-axis direction when viewed from the radial direction. The first magnetic plate 123 faces the first magnet 45 of the movable body 20 via the first coil 110, and serves as a magnetic spring for returning the movable body 20 to the reference rotational position in the rotational direction around the Y axis. Configure. Further, as shown in FIGS. 3 and 7, a second magnetic plate 125 is arranged on the side of the third coil 114 opposite to the movable body 20 . That is, the second magnetic plate 125 is arranged on the side opposite to the movable body 20 with respect to the third coil 114 in the radial direction of the optical axis L. As shown in FIG. The second magnetic plate 125 has a shape elongated in the circumferential direction. The second magnetic plate 125 faces the third magnet 49 of the movable body 20 via the third coil 114, and is a magnet for returning the movable body 20 to the reference rotational position in the rotational direction around the optical axis L. Configure springs.

(Manufacturing method of optical unit with shake correction function)
Here, a method for manufacturing an optical unit with a shake correction function will be described. FIG. 13 is a flow chart of a method for manufacturing an optical unit with a shake correction function. 14A and 14B are explanatory diagrams of a connection method for connecting the fixed body 23 (case 97) and the gimbal frame 80. FIG.

In order to configure the second connection mechanism 82 , through holes 117 are formed in the seventh side plate 107 and the eighth side plate 108 of the case 97 in advance. In this example, the through hole 117 is formed when the case base material is formed by punching one piece of sheet metal in the developed shape of the case 97 developed on a plane. Further, when forming the through-hole 117, a cylindrical portion 118 is formed at the opening edge of the through-hole 117 by burring. Specifically, in forming the through hole 117, first, a pilot hole for the through hole 117 is formed in the case base material, and then the through hole 117 and the cylindrical portion 118 are formed by burring (step ST1). After that, the case base material is bent and welded to form a frame-shaped case 97 .

Next, the second shafts 84 are passed through the through holes 117 provided in the seventh side plate 107 and the eighth side plate 108 of the case 97 . In parallel with this, the movable body 20 is supported by the rotation support mechanism 21 . Also, the rotation support mechanism 21 and the gimbal frame 80 are connected by the first connection mechanism 81 (step ST2).

After that, the gimbal frame 80 supporting the movable body 20 via the rotation support mechanism 21 is placed inside the case 97 . As a result, each of the second-axis-side gimbal-frame extension third extension portions 87 c of the pair of second-axis-side gimbal-frame extension portions 87 of the gimbal frame 80 is connected to the seventh side wall 41 and the seventh side plate 107 of the holder 29 . and between the eighth side wall 42 and the eighth side plate 108 of the holder 29, respectively. Also, the second axis side shaft 84 held by the seventh side plate 107 and the second axis side concave curved surface 95 of the third extension portion 87c of the second axis side gimbal frame extension portion 87c face each other in the direction of the second axis R2. do. Similarly, the second axis-side shaft 84 held by the eighth side plate 108 and the second axis-side concave curved surface 95 of the second axis-side gimbal frame extension third extension portion 87c are aligned in the second axis R2 direction. opposite. Therefore, each second axis side shaft 84 is moved along the through hole 117 and the cylindrical portion 118 toward the second axis side gimbal frame extension portion third extension portion 87c, and each second axis side shaft 84 is is inserted into the concave curved surface 95 on the second shaft side and brought into contact (step ST3).

Next, the pair of second axis-side shafts 84 are moved in a direction toward each other on the second axis R2 while measuring the load received by each of the second axis-side shafts 84 from the gimbal frame 80 (step ST4). Specifically, as shown in FIG. 14, a pressure sensor 130 for measuring the pressure that the second axis side shaft 84 receives from the gimbal frame 80 side is attached in advance to each second axis side shaft 84 . Alternatively, a pressure sensor 130 that measures the pressure that the second axis side shaft 84 receives from the gimbal frame 80 side in the direction of the second axis R2 is attached to the jig for moving the second axis side shafts 84 in the direction toward each other. keep it installed. Then, while monitoring the output from the pressure sensor 130, the pair of second shaft side shafts 84 are simultaneously moved toward each other.

Then, when the output from the pressure sensor 130 reaches a predetermined value (load) (step ST5: Yes), the seventh side plate 107 and the second shaft side shaft 84, and the eighth side plate 108 and the second shaft side shaft 84 are welded (step ST6). The welding between the seventh side plate 107 and the second shaft 84 and the welding between the eighth side plate 108 and the second shaft 84 can be performed from the outer peripheral side of the case 97 .

When each second shaft side shaft 84 is fixed to the case 97 by welding, the second connection mechanism 82 is constructed. As a result, the rotation support mechanism 21 that supports the movable body 20 is supported by the fixed body 23 via the gimbal mechanism 22 so as to be rotatable about the second axis R2. Here, in a state in which each of the second-axis-side shafts 84 is fixed to the case 97, the pair of second-axis-side gimbal frame extension portions 87 bends toward the inner peripheral side. Therefore, the second-axis-side gimbal frame extending portion 87 elastically contacts the second-axis-side shaft 84 from the inner peripheral side due to the elastic restoring force toward the outer peripheral side.

(Effect)
According to this example, the rotation support mechanism 21 that supports the movable body 20 so as to be rotatable about the optical axis L is rotated by the gimbal mechanism 22 about the first axis R1 and the second axis R2 intersecting the optical axis L. supported as possible. Therefore, the rotation support mechanism 21 rotates integrally with the movable body 20 about the first axis R1 and the second axis R2. Therefore, even when the movable body 20 rotates about the first axis R1 or the second axis R2, the rotation axis of the movable body 20 by the rotation support mechanism 21 and the optical axis L of the movable body 20 match. Therefore, when the movable body 20 is rotated about the first axis R1 or the second axis R2 by driving the rolling correction magnetic driving mechanism 28 to rotate the movable body 20, the movable body 20 is caused to emit light. Rotate around axis L.

In this example, by moving the second shaft 84 along the through hole 117 in the direction of the second axis R2, the second shaft 84 moves toward the case 97 (seventh side plate 107 and eighth side plate 108). can adjust the amount of protrusion from the gimbal frame extending portion 87 side. Here, if the projection amount of the second axis side shaft 84 is increased, the second axis side gimbal frame extending portion 87 with which the tip of the second axis side shaft 84 contacts can be bent. Further, by moving the second axis side shaft 84 in the direction of the second axis R2, the bending amount of the second axis side gimbal frame extending portion 87 with which the tip of the second axis side shaft 84 contacts can be adjusted. As a result, the biasing force with which the second-axis-side gimbal frame extension portion 87 is biased against the second-axis-side shaft 84 can be adjusted. The contact state becomes stable.

Furthermore, in this example, when the second shaft 84 projects from the case 97 (seventh side plate 107 and eighth side plate 108), the load received by the second shaft 84 from the gimbal frame 80 is measured. reaches a predetermined value, the second shaft side shaft 84 is fixed to the case 97 . Thereby, the biasing force with which the second-axis-side gimbal frame extension portion 87 is biased against the second-axis-side shaft 84 can be set to a predetermined value. Therefore, the gimbal frame 80 supported by the movable body 20 can be accurately rotated around the second axis R2.

In this example, the seventh side plate 107 and the eighth side plate 108 protrude in the direction of the second axis R2 from the opening edge of the through hole 117 on the plate surface on the side where the second axis side gimbal frame extending portion 87 is located. The cylindrical portion 118 that supports the second axis side shaft 84 is provided, so it is easy to move the second axis side shaft 84 on the second axis R2.

Here, in this example, when forming the through holes 117 in each of the seventh side plate 107 and the eighth side plate 108, the tubular portion 118 is formed by burring. Therefore, it is easy to provide the cylindrical portion 118 on the seventh side plate 107 and the eighth side plate 108 .

Further, the case 97 and the second shaft side shaft 84 including the seventh side plate 107 and the eighth side plate 108 and the second shaft side shaft 84 are made of metal. are provided with weld marks 120 . That is, the second shaft side shaft 84 whose protrusion amount is adjusted is fixed to the case 97 by welding. Therefore, it is easy to fix the second shaft side shaft 84 to the fixed body 23 .

In this example, the rotation support mechanism 21 includes a plate roll 51 fixed to the movable body 20, a plate holder 52 having a facing portion 56 facing the plate roll 51 in the direction of the optical axis L, and a plate roll 51. and a rotating mechanism 53 that is rotatable around the optical axis L with respect to the holder 52 . The plate roll 51 has a plate roll annular portion 57 overlapping the movable body 20 when viewed from the direction of the optical axis L, and the plate holder 52 includes a plate holder annular portion 65 facing the plate roll annular portion 57, a plate holder A pair of plate holder extending portions 66 projecting from the annular portion 65 on both sides in the direction of the first axis R1 and extending in the direction of the optical axis L on both sides in the direction of the first axis R1 of the movable body 20 are provided. The gimbal frame 80 includes a pair of first axis side gimbal frame extension portions that protrude from the gimbal frame body portion 85 to both sides in the direction of the first axis R1 and extend in the optical axis L direction on the outer peripheral sides of the pair of plate holder extension portions 66. 86. The first connection mechanism 81 is inserted into a through hole 117 passing through the pair of first-axis-side gimbal frame extensions 86 in the direction of the first axis R1, and is mounted on the plate holder extensions 66 on the first axis R1. a pair of first shaft-side shafts 83 protruding outward, and first shaft-side concave curved surfaces 69 provided on each plate holder extension portion 66 and with which the tips of the first shaft-side shafts 83 come into contact. Therefore, the rotation support mechanism 21 can rotatably support the movable body 20 . Further, the gimbal frame 80 can support the rotation support mechanism 21 so as to be rotatable around the first axis R1.

Here, on the outer surface of the first axis side gimbal frame extension part 86 opposite to the plate holder extension part 66, the first axis side from the first axis side gimbal frame extension part second extension part 66b is provided. A rib 91 is provided that reaches the third extension portion 66c of the gimbal frame extension portion. Therefore, in the first connection mechanism 81 , the first axis-side gimbal frame extension portion 86 can be prevented from being excessively bent due to contact between the first axis-side shaft 83 and the first axis-side concave curved surface 69 .

(Modification)
One of the first pressurizing mechanism 54 and the second pressurizing mechanism 55 can be omitted.

Here, if the second pressurizing mechanism 55 is omitted, the first magnet 45 and the second magnet 47 of the anti-shake magnetic drive mechanism 25 are mounted on the case 97 side, and the first coil 110 and the second coil are mounted. 112 can be mounted on the side of the movable body 20 . Further, the third magnet 49 of the rolling correction magnetic drive mechanism 28 can be mounted on the case 97 side, and the third coil 114 can be mounted on the movable body 20 side.

DESCRIPTION OF SYMBOLS 1... Optical unit with a shake correction function, 2... Cover, 3... Optical unit main body part, 4... Lens, 5... Imaging module, 6... First flexible printed board, 7... Second flexible printed board, 8... Third flexible Printed circuit board 9... Image sensor 10... Image side cover 11
Subject-side cover 12 First cover 13 Second cover 15 Bending portion 16 First bending portion 17 Second bending portion 18 Third bending portion 19 Reinforcing plate 20 Movable body 21 Rotation support mechanism 22 Gimbal mechanism 23 Fixed body 25 Anti-shake magnetic drive mechanism 26 First anti-shake magnetic drive mechanism 27 Second anti-shake magnetic drive mechanism 28 Rolling correction magnetic drive mechanism 29 Holder 30 Imaging module main body 31 Cylindrical portion 32 Movable body main body 33 Movable body projecting portion 35 First side wall 36 Second side wall , 37... 3rd side wall 38... 4th side wall 39... 5th side wall 40... 6th side wall 41... 7th side wall 42... 8th side wall 42a... opening 44... first yoke 45... First magnet 46...Second yoke 47...Second magnet 48...Third yoke 49...Third magnet 51...Plate roll 52...Plate holder 53...Rotating mechanism 54...First pressure mechanism , 55... Second pressure mechanism, 56... Opposing portion, 57... Plate roll annular part, 58... Plate roll extension part, 59... Plate roll annular plate, 60... Plate roll annular wall, 61... Plate roll annular groove, 62 Pressurizing magnet 63 Fixed portion 63a, 63b Protrusion 65 Plate holder annular portion 66 Plate holder extension portion 66a Plate holder first extension portion 66b Plate holder second extension Part 66c... Plate holder third extension part 67... Plate holder annular plate 68... Plate holder arc wall 69... First axis side concave surface 70... Plate holder arc groove 71... Sphere 72... Retainer 72a... Sphere holding hole 72b... Outer retainer portion 72c... Inner retainer portion 73... Outer protrusion 74... Inner protrusion 75... Retainer through hole 77... Plate member 79... Plate roll fixing hole 80... Gimbal frame 81 First connection mechanism 82 Second connection mechanism 83 First axis side shaft 84 Second axis side shaft 85 Gimbal frame main body 85a Central plate portion 85b First first Inclined plate portion 85c Second inclined plate portion 86 First axis side gimbal frame extension portion 86a First axis side gimbal frame extension portion First extension portion 86b First axis side gimbal frame extension Installation portion second extension portion 86c First axis side gimbal frame extension portion third extension portion 87 Second axis side gimbal frame extension portion 87a Second axis side gimbal frame extension portion first Extension part 87b... Second axis side gimbal frame extension part Second extension part 87c... Second axis side gimbal frame extension part third extension part 90... Opening 91... Rib 92... Gimbal Frame extension portion through-hole 93 First axis side shaft support cylindrical portion 94 Gimbal frame extension portion protrusion 95 Second axis side concave surface 97 Case 98 Frame plate portion 99 Frame portion 101 First side plate 102 Second side plate 103 Third side plate 104 Fourth side plate 105 Fifth side plate 106 Sixth side plate 107 Seventh side plate 108 Eighth side plate Side plate 109 First coil holding opening 110 First coil 111 Second coil holding opening 112 Second coil 113 Third coil holding opening 114 Third coil DESCRIPTION OF SYMBOLS 115... Notch part 117... Through hole 118... Cylindrical part 120... Weld mark 123... First magnetic plate 125... Second magnetic plate 130... Pressure sensor R1... First axis R2... Second shaft

Claims (9)

a movable body having a lens;
a rotation support mechanism that supports the movable body so as to be rotatable about the optical axis of the lens;
a gimbal mechanism that rotatably supports the rotation support mechanism about a first axis that intersects with the optical axis and rotatably supports it about a second axis that intersects with the optical axis and the first axis;
a fixed body that supports the movable body via the gimbal mechanism and the rotation support mechanism;
The gimbal mechanism includes a gimbal frame, a first connection mechanism that rotatably connects the rotation support mechanism and the gimbal frame about the first axis, and a connection mechanism that connects the fixed body and the gimbal frame about the second axis. comprising a second connection mechanism rotatably connected,
The gimbal frame includes a gimbal frame main body portion that overlaps the movable body when viewed from the optical axis direction, and a pair of second gimbal frame main bodies that protrude from the gimbal frame main body portion on both sides in the second axial direction and extend in the optical axis direction. a 2-axis side gimbal frame extension,
The fixed body includes two side plates facing the respective second-axis-side gimbal-frame extensions on the outer peripheral side of the pair of second-axis-side gimbal-frame extensions,
The second connection mechanism includes a pair of second shaft-side shafts that are inserted into through-holes penetrating each side plate in the second axial direction and protrude inwardly on the second shaft, and each second shaft-side shaft. an optical unit with a shake correction function, comprising: a second axis side concave curved surface provided in a gimbal frame extending portion and with which the tip end of the second axis side shaft contacts. Each side plate has a cylindrical portion that protrudes in the second axis direction from the opening edge of the through hole on the side of the plate surface on which the second axis side gimbal frame extension portion is located and supports the second axis side shaft. 2. The optical unit with a shake correction function according to claim 1, wherein: the side plate and the second shaft side shaft are made of metal,
3. The optical unit with shake correction function according to claim 2, wherein a contact portion between the side plate and the second axis side shaft is provided with a welding mark. the fixed body includes a frame surrounding the movable body, the rotation support mechanism, and the gimbal frame from the outer peripheral side;
4. The optical unit with shake correction function according to claim 3, wherein each side plate is provided on the frame. a shake correction magnetic drive mechanism that rotates the movable body around the first axis and around the second axis;
a rolling correction magnetic drive mechanism for rotating the movable body around the optical axis;
The shake correction magnetic drive mechanism and the rolling correction magnetic drive mechanism are arranged in a circumferential direction around the optical axis,
The anti-shake magnetic drive mechanism includes an anti-shake magnet fixed to one of the movable body and the frame, and an anti-shake coil fixed to the other;
5. The rolling correction magnetic drive mechanism includes a rolling correction magnet fixed to one of the movable body and the frame, and a rolling correction coil fixed to the other. Optical unit with image stabilization function. The rotation support mechanism includes a plate roll fixed to the movable body, a plate holder including a facing portion facing the plate roll in the optical axis direction, and rolling while in contact with the plate roll and the facing portion. a rotating mechanism that has a plurality of spheres that allow the plate roll to rotate about the optical axis with respect to the plate holder,
The plate roll has a plate roll annular portion overlapping the movable body when viewed from the optical axis direction,
The plate holder includes a plate holder annular portion that faces the plate roll annular portion, and a plate holder annular portion that protrudes from the plate holder annular portion to both sides in the first axial direction so that both sides of the movable body in the first axial direction are aligned with the optical axis. a pair of plate holder extensions extending in the direction of
The plate holder annular portion is the facing portion,
the gimbal frame includes a pair of first-axis-side gimbal-frame extension portions that protrude from the gimbal-frame body portion to both sides in the first-axis direction and extend radially outward of the pair of plate-holder extension portions;
The first connection mechanism includes a pair of first shaft-side connecting mechanisms that are inserted into through-holes penetrating the respective first-axis-side gimbal frame extending portions in the first axial direction and protrude radially inward on the first shaft. 6. The plate holder according to any one of claims 1 to 5, further comprising: a shaft, and a first shaft side concave curved surface provided on each plate holder extending portion and with which a tip end of the first shaft side shaft contacts. Optical unit with image stabilization function described in item. The first-axis-side gimbal frame extension portion includes an inclined extension portion that inclines in the optical axis direction toward the first axis direction, and a connection extension portion that extends in the optical axis direction from an end of the inclined extension portion. and
The plate holder extending portion includes a plate holder first extending portion extending from the plate holder annular portion to both sides in the first axial direction, and a plate holder extending from an outer peripheral end of the plate holder first extending portion. a plate holder second extension portion inclined in the optical axis direction in a direction away from the annular portion; and a plate holder third extension portion extending in the optical axis direction from an end of the plate holder second extension portion. , and
the first shaft-side concave curved surface is provided on a third extending portion of the plate holder ,
A rib extending from the inclined extension portion to the connecting extension portion is provided on the outer surface of the first axis-side gimbal frame extension portion opposite to the plate holder extension portion. 7. The optical unit with a shake correction function according to claim 6.
In the method for manufacturing an optical unit with a shake correction function according to claim 4,
The rotation support mechanism for rotatably supporting the movable body is connected to the gimbal frame by the first connection mechanism, and the pair of second axis-side shafts are inserted into the through holes of the pair of side plates, respectively. let through,
disposing the movable body, the rotation support mechanism, and the gimbal frame on the inner peripheral side of the frame;
bringing the inner peripheral end of each second axis side shaft into contact with the second axis side concave curved surface of each second axis side gimbal frame extending portion;
moving the pair of second axis-side shafts in a direction approaching each other on the second axis while measuring the load received by each of the second axis-side shafts from the gimbal frame;
Manufacture of an optical unit with a shake correction function, wherein when the load reaches a predetermined value, the side plate and the second axis side shaft are welded to fix the second axis side shaft to the frame. Method. 9. The method of manufacturing an optical unit with a shake correction function according to claim 8, wherein when forming the through holes in each of the pair of side plates, the cylindrical portion is formed by burring.

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