JP2022100784A - Optical unit with shake correction function - Google Patents

Abstract

Kind Code: A1 An optical unit with a shake correction function that rotates a movable body around an optical axis is intended to reduce the product height in the optical axis direction and to reduce the number of parts. Kind Code: A1 An optical unit with a shake correcting function has a rotation support mechanism 12 that supports a movable body 10 so as to be rotatable about an optical axis L, and a gimbal mechanism that connects the rotation support mechanism 12 and a fixed body. The rotation support mechanism 12 includes a rolling element that rolls between a first annular plate portion 26 surrounding the optical axis L and a second annular plate portion. The movable body 10 includes a resin holder 24 surrounding the outer peripheral side of the camera module 2, and a metal first member 25 fixed to the holder 24. The first member 25 surrounds the optical axis L to A first annular plate portion 26 that overlaps the camera module 2 when viewed from the direction of the axis L, and a yoke that connects the first annular plate portion 26 and the holder 24 and is fixed to the inner peripheral side of the magnet of the shake correction magnetic drive mechanism. It has a functioning first extension 27 . [Selection drawing] Fig. 8

Description

The present invention relates to an optical unit with a shake correction function that corrects runout by rotating a camera module around an optical axis.

In the optical unit mounted on the mobile terminal or the moving body, in order to suppress the disturbance of the captured image when the mobile terminal or the moving body is moved, a movable body equipped with a camera module is provided around the optical axis and the optical axis. Some rotate around the first axis that intersects, as well as around the optical axis and the second axis that intersects the first axis. Patent Document 1 describes this kind of optical unit with a shake correction function.

The optical unit with a runout correction function of Patent Document 1 has a fixed body and a movable body that is rotatably supported around the optical axis with respect to the fixed body. The movable body includes a camera module including a lens, a support that surrounds the camera module, and a gimbal mechanism that rotatably supports the camera module around the first axis and the second axis inside the support. The optical unit with a shake correction function includes a magnetic drive mechanism for rocking that rotates the camera module around the first axis and the second axis in the movable body, and a rotation support mechanism that rotatably supports the movable body around the optical axis. And, it is provided with a magnetic drive mechanism for rolling that rotates the camera module around the optical axis by rotating the movable body around the optical axis.

In Patent Document 1, the rotation support mechanism includes a convex portion protruding rearward in the optical axis direction from the bottom of the movable body, and a ball bearing surrounding the convex portion. Further, in Patent Document 1, as another configuration example of the rotation support mechanism, a configuration in which a pivot portion is provided at the bottom of the movable body instead of the ball bearing, and a ball bearing in which an arcuate convex surface is provided on the side surface of the movable body. It is described that a rotation support mechanism is provided on the outer peripheral side of the movable body, for example.

JP 2015-82072A

In the optical unit with a runout correction function of Patent Document 1, a rotation support mechanism such as a ball bearing or a pivot is provided on the rear side of the movable body in the optical axis direction. With such a configuration, the height of the optical unit with the shake correction function in the optical axis direction becomes large, and it is difficult to reduce the thickness of the entire product in the optical axis direction. Further, Patent Document 1 also describes a configuration in which a gimbal mechanism is provided inside the movable body and a rotation support mechanism is provided on the outer peripheral side of the movable body. In such a configuration, a product viewed from the optical axis direction is provided. The overall outer shape becomes large.

In Japanese Patent Application No. 2020-36404, the present inventors have applied for an optical unit with a runout correction function in which a gimbal mechanism is provided outside the movable body and a rotation support mechanism is provided between the gimbal mechanism and the movable body. .. The rotation support mechanism of Japanese Patent Application No. 2020-36404 arranges a ball bearing in which a rolling element is inserted between two annular rail members facing each other in the optical axis direction so as to surround the lens barrel portion of the camera module. The rail is fixed to the end face of the movable body on the subject side, and the other rail is rotatably supported around the first axis by a gimbal mechanism. Therefore, it is not necessary to secure a space for arranging the rotation support mechanism on the rear side of the movable body in the optical axis direction and on the outer peripheral side of the movable body.

Here, in the movable body of Japanese Patent Application No. 2020-36404, the holder for holding the camera module is made of sheet metal, and the holder end plate portion is provided so as to project from the holder frame portion surrounding the camera module to the inner peripheral side. Ensure strength. In the rotation support mechanism, the two rails that hold the rolling elements face each other in the optical axis direction, and the sheet metal plate roll connected to the gimbal frame overlaps the subject side of the two rails, and the subject of the plate roll is further overlapped. A sheet metal stopper member overlaps on the side. The stopper member regulates the plate roll from coming off when an impact is applied.

In the configuration of Japanese Patent Application No. 2020-36404, a large number of parts overlap in the optical axis direction on the subject side of the camera module, and further, the holder end plate portion covering the camera module and the rotation support mechanism overlap in the optical axis direction. , The product height in the optical axis direction becomes large. In addition, since the number of parts is large, the assembly work is troublesome, and the dimensional tolerances of many parts are accumulated, so that the dimensional variation is large.

In view of these points, an object of the present invention is to reduce the product height in the optical axis direction and reduce the number of parts in an optical unit with a runout correction function that rotates a movable body around the optical axis. It is in.

In order to solve the above problems, the optical unit with a shake correction function of the present invention includes a movable body including a camera module and a rotation support mechanism that rotatably supports the movable body around the optical axis of the camera module. The rotation support mechanism is rotatably supported around the first axis intersecting the optical axis, and the rotation support mechanism is rotatably supported around the optical axis and the second axis intersecting the first axis. It has a gimbal mechanism, a fixed body that supports the movable body via the gimbal mechanism and the rotation support mechanism, and the movable body has a resin holder that surrounds the outer peripheral side of the camera module and the holder. The first member includes a first member made of metal fixed to the camera module, and the first member includes a first annular plate portion that surrounds the optical axis and overlaps with the camera module when viewed from the optical axis direction, and the first annular plate. The rotation support mechanism includes a first extension portion for connecting the portion and the holder, and the rotation support mechanism includes a first annular groove formed in the first annular plate portion, the first annular groove, and the optical axis direction. A second member having a second annular plate portion on which an opposing second annular groove is formed and rotatably supported around the first axis by the gimbal mechanism, the first annular groove and the second annular groove. A plurality of rolling elements that are inserted into and roll between the first annular plate portion and the second annular plate portion, and the holder includes the movable body around the first axis and the first. The runout correction magnet of the runout correction magnetic drive mechanism that rotates around two axes is fixed, and the first extension portion is made of magnetic metal and extends from the first annular plate portion to the outer peripheral side in the optical axis direction. It is characterized in that it is bent to the other side and fixed to the inner peripheral side of the runout correction magnet.

According to the present invention, the movable body includes a resin holder that surrounds the outer peripheral side of the camera module and a first metal member that is fixed to the holder, and the first member surrounds the optical axis and the optical axis. A first annular plate portion that overlaps with the camera module when viewed from the direction, and a first extending portion made of magnetic metal that connects the first annular plate portion and the holder and is fixed to the inner peripheral side of the runout correction magnet. It is equipped with. In this way, by integrating the rail into which the rolling element of the rotation support mechanism is inserted and the yoke for the magnet of the magnetic drive mechanism for runout correction into the first member, the number of parts can be reduced, and the movable body and rotation support can be reduced. It is possible to improve the assemblability of the mechanism and reduce the cost. Further, by integrating the yoke with the first member, the position accuracy of the yoke can be improved. Further, since the holder is made of resin, the strength can be ensured without providing the end plate portion extending to the inner peripheral side at the end portion in the optical axis direction unlike the holder made of sheet metal. Therefore, the height of the movable body in the optical axis direction can be lowered.

In the present invention, the runout correction magnetic drive mechanism includes a first runout correction magnetic drive mechanism that rotates the movable body around the first axis and a second runout correction that rotates the movable body around the second axis. The holder includes a first magnet of the first runout correction magnetic drive mechanism and a second magnet of the second runout correction magnetic drive mechanism. The third magnet of the rolling correction magnetic drive mechanism that rotates the movable body around the optical axis is fixed, and the first magnet, the second magnet, and the third magnet are in the circumferential direction around the optical axis. The first extension is fixed at each position on the inner peripheral side of the first magnet, the inner peripheral side of the second magnet, and the inner peripheral side of the third magnet. Is preferable. In this way, the yokes of the runout correction magnetic drive mechanism and the rolling correction magnetic drive mechanism for the magnets are all integrated into the first member. Therefore, the number of parts can be reduced, the assemblability of the movable body and the rotation support mechanism can be improved, and the cost can be reduced. In addition, the position accuracy of the yoke can be improved.

In the present invention, the second member is a pair of second extending portions projecting from the second annular plate portion to both sides in the first axial direction, and the second annular plate portion in the second axial direction. A pair of second protruding plate portions projecting to both sides are provided, the pair of second extending portions are connected to the gimbal mechanism, and the second annular plate portion includes the first annular plate portion and the camera module. For a stopper that is arranged in the gap in the optical axis direction and faces the second member in the optical axis direction at the diagonal position in the first axis direction and the diagonal position in the second axis direction of the holder. It is preferable that the convex portion is provided. In this way, the first annular plate portion functions as a stopper member that restricts the second annular plate portion from coming off. Therefore, since it is not necessary to separately overlap the stopper member that overlaps with the second annular plate portion in the optical axis direction, the height of the rotation support mechanism in the optical axis direction can be lowered. Therefore, the height of the optical unit with the shake correction function in the optical axis direction can be lowered. Further, the separation of the second annular plate portion provided on the second member from the first annular plate portion can be regulated by the stopper convex portion provided on the holder. Therefore, it is possible to prevent the second annular plate portion from falling off. Further, since the holder is made of resin, it is easier to form a complicated uneven shape than that made of sheet metal. Therefore, it is easy to manufacture a holder having a convex portion for a stopper.

In the present invention, the first annular plate portion and the second annular plate portion overlap the camera module from one side in the optical axis direction, and the diagonal portion of the holder in the first axial direction and the diagonal portion in the first axial direction. It is preferable that the diagonal portion of the holder in the second axis direction has the other end portion in the optical axis direction recessed in one side in the optical axis direction with respect to the camera module. By doing so, it is possible to reduce the height of the space in which the movable body moves in the optical axis direction when the movable body swings around the first axis and the second axis. Therefore, the product height in the optical axis direction of the optical unit with the shake correction function can be reduced. Further, since the holder is made of resin, it is easier to form a complicated uneven shape than that made of sheet metal. Therefore, it is easy to manufacture a holder having a shape in which the diagonal portion in the first axial direction and the diagonal portion in the second axial direction are recessed.

In the present invention, the first annular plate portion and the second annular plate portion overlap with the camera module from one side in the optical axis direction, and the holders are arranged in the circumferential direction surrounding the camera module. A plurality of side walls are provided, and at least one of the side walls arranged at an angle position between the first axial direction and the second axial direction is the above-mentioned than the camera module. It is preferable that a convex portion protruding on the other side in the optical axis direction is provided. By doing so, when the movable body collides with the fixed body due to the drop impact, the impact is applied to the convex portion, so that it is possible to avoid directly applying the impact to the camera module.

In the present invention, it is preferable that the convex portion is arranged at the center of the side wall in the circumferential direction. In this way, the convex portion is arranged at the position where the distance from the optical axis is the smallest in the holder, that is, the position where the amount of movement in the optical axis direction is the smallest when the movable body swings. Therefore, it is not necessary to increase the gap in the optical axis direction between the movable body and the fixed body in order to prevent the convex portion from colliding with the fixed body when the movable body is swung. It is possible to avoid increasing the product height in the optical axis direction of the unit.

In the present invention, it is preferable that the side surfaces on both sides of the convex portion in the circumferential direction are tapered surfaces that incline toward the other side in the optical axis direction toward the center of the convex portion in the circumferential direction. In this way, the convex portion has a shape having a large width in the circumferential direction of the base end portion, so that the strength is increased. Further, the shape in which the side surface is a tapered surface is a shape in which the amount of protrusion is smaller as the amount of movement in the optical axis direction is larger when the movable body swings. Therefore, it is not necessary to increase the gap in the optical axis direction between the movable body and the fixed body in order to prevent the convex portion from colliding with the fixed body when the movable body is swung. It is possible to avoid increasing the product height in the optical axis direction of the unit.

In the present invention, the rotation support mechanism includes a pressurizing mechanism that applies a force that brings the first annular groove and the second annular groove close to each other in the optical axis direction, and the pressurizing mechanism is the first annular groove. A first protruding plate portion that protrudes from the plate portion to the outer peripheral side and a pressurizing magnet fixed to a part of the second member in the circumferential direction around the optical axis are provided, and the first protruding plate portion is made of magnetic metal. It is preferable that the magnet is attracted by the pressurizing magnet. In this way, the parts of the pressurization mechanism can be integrated with the first member. Therefore, the number of parts can be reduced and the assemblability can be improved. Further, by mounting a pressurizing magnet on the second member that rotates relative to the movable body and providing the movable body with a first protruding plate portion attracted by the pressurizing magnet, the runout correction mounted on the movable body is used. It is possible to prevent the rotation position of the first protruding plate portion from being displaced by being attracted by the magnets of the magnetic drive mechanism and the magnetic drive mechanism for rolling correction. Therefore, it is possible to prevent the pressurization mechanism from being interfered with by the runout correction magnetic drive mechanism and the rolling correction magnetic drive mechanism. Further, the pressurization mechanism can define the angular position around the optical axis of the movable body.

In the present invention, the rotation regulating mechanism for regulating the rotation range of the movable body around the optical axis is provided, and the rotation regulating mechanism includes a first rotation regulating portion formed on the first member or the holder, and the first rotation regulating unit. A second rotation restricting portion formed on the two members is provided, and one of the first rotation regulating portion and the second rotation regulating portion is the circumference of the other of the first rotation regulating portion and the second rotation regulating portion. It is preferable to enclose both sides in the direction. By doing so, the rotation regulation mechanism can be completed between the first member and the second member, or between the second member and the holder. Therefore, since the rotation restricting mechanism can be configured without the stopper member overlapping the first member and the second member in the optical axis direction, the height of the rotation support mechanism in the optical axis direction can be lowered. Further, since the rotation regulation mechanism can be configured with a small number of parts, it is possible to suppress a decrease in the dimensional accuracy of the rotation regulation mechanism due to the accumulation of component tolerances. Therefore, the rotation range of the movable body can be regulated with high accuracy.

In the present invention, the first rotation restricting portion extends from the first annular plate portion toward the outer peripheral side and is fixed to the holder, and the second rotation regulating portion is a central portion in the circumferential direction of the first rotation regulating portion. Is preferably arranged in the notch portion of the notch. By doing so, since the connecting portion connecting the first annular plate portion and the holder can be used as the first rotation restricting portion, the shape of the first member can be simplified.

According to the present invention, since the rail into which the rolling element of the rotation support mechanism is inserted and the yoke for the magnet of the magnetic drive mechanism for runout correction are integrated into the first member, the number of parts can be reduced and the movable body can be reduced. In addition, the assemblability of the rotation support mechanism can be improved and the cost can be reduced. Further, by integrating the yoke with the first member, the position accuracy of the yoke can be improved. Further, since the holder is made of resin, the strength can be ensured without providing the end plate portion extending to the inner peripheral side at the end portion in the optical axis direction unlike the holder made of sheet metal. Therefore, the height of the movable body in the optical axis direction can be lowered.

It is a perspective view of the optical unit with a runout correction function. It is an exploded perspective view of the optical unit with a runout correction function. It is a top view of the optical unit with a runout correction function with a cover removed from the subject side. It is an exploded perspective view of the optical unit with a runout correction function which removed a cover and a base. It is sectional drawing of the optical unit with a runout correction function cut at the position AA of FIG. It is sectional drawing of the optical unit with a runout correction function cut at the BB position of FIG. It is a perspective view of the gimbal frame and the gimbal frame receiving member. It is a perspective view which looked at the movable body and the rotation support mechanism from the subject side. It is an exploded perspective view of a movable body and a rotation support mechanism. It is a perspective view which looked at the movable body and the rotation support mechanism from the anti-subject side.

Hereinafter, embodiments of an optical unit with a shake correction function to which the present invention is applied will be described with reference to the drawings.

(overall structure)
FIG. 1 is a perspective view of an optical unit with a runout correction function. FIG. 2 is an exploded perspective view of an optical unit with a runout correction function. FIG. 3 is a plan view of the optical unit with a shake correction function from which the cover is removed, as viewed from the subject side. FIG. 4 is an exploded perspective view of an optical unit with a runout correction function from which the cover and the base are removed.

As shown in FIG. 1, the optical unit 1 with a shake correction function includes a movable body 10 including a camera module 2 and a fixed body 11 surrounding the movable body 10 from the outside. The fixed body 11 includes a frame-shaped case 3 that surrounds the movable body 10 from the outer peripheral side, a cover 4 that is fixed to the case 3 from the subject side, and a movable body that is fixed to the case 3 from the anti-subject side. A base 5 for covering is provided. Further, the optical unit 1 with a runout correction function includes a flexible printed substrate 6 drawn out from the movable body 10 and a flexible printed substrate 7 routed along the outer peripheral surface of the case 3.

The optical unit 1 with a shake correction function is used, for example, in an optical device such as a mobile phone with a camera and a drive recorder, and an optical device such as an action camera and a wearable camera mounted on a moving body such as a helmet, a bicycle, and a radiocon helicopter. .. In such an optical device, if the optical device shakes during shooting, the captured image is distorted. The optical unit 1 with a shake correction function corrects the tilt of the camera module 2 based on the acceleration, the angular velocity, the amount of shake, etc. detected by a detection means such as a gyroscope in order to prevent the captured image from tilting.

The camera module 2 includes a lens 2a and an image pickup element 2b arranged on the optical axis L of the lens 2a (see FIGS. 5 and 6). The optical unit 1 with a shake correction function is a camera module around the optical axis L of the lens 2a, around the first axis R1 orthogonal to the optical axis L, and around the second axis R2 orthogonal to the optical axis L and the first axis R1. 2 is rotated to correct the runout.

In the following description, the three axes orthogonal to each other are defined as the X-axis direction, the Y-axis direction, and the Z-axis direction. Further, one side in the X-axis direction is the −X direction, and the other side is the + X direction. One side in 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 Z-axis direction is the optical axis L direction. The −Z direction is the anti-subject side of the camera module 2, and the + Z direction is the subject side of the camera module 2. The first axis R1 and the second axis R2 are tilted 45 degrees with respect to the X axis and the Y axis around the Z axis (optical axis).

The optical unit 1 with a runout correction function includes a rotation support mechanism 12 that rotatably supports the movable body 10 around the Z axis, and a gimbal mechanism 13. The gimbal mechanism 13 rotatably supports the rotation support mechanism 12 around the first axis R1 and rotatably supports the rotation support mechanism 12 around the second axis R2. The movable body 10 is supported by the fixed body 11 in a state of being rotatable around the first axis R1 and the second axis R2 via the rotation support mechanism 12 and the gimbal mechanism 13.

As shown in FIG. 3, the gimbal mechanism 13 includes a gimbal frame 14, and a first connection mechanism 15 that rotatably connects the gimbal frame 14 and the rotation support mechanism 12 around the first axis R1. The first connection mechanism 15 is provided on both sides of the gimbal frame 14 in the direction of the first axis R1. Further, the gimbal mechanism 13 includes a second connection mechanism 16 that rotatably connects the gimbal frame 14 and the fixed body 11 around the second axis R2. The second connection mechanism 16 is provided on both sides of the gimbal frame 14 in the second axis R2 direction.

Further, the optical unit 1 with a runout correction function includes a runout correction magnetic drive mechanism 20 that rotates the movable body 10 around the first axis R1 and around the second axis R2. As shown in FIG. 3, the runout correction magnetic drive mechanism 20 includes a first runout correction magnetic drive mechanism 21 that generates a driving force around the X axis with respect to the movable body 10, and a Y axis with respect to the movable body 10. It is provided with a second runout correction magnetic drive mechanism 22 that generates a rotational driving force. The first runout correction magnetic drive mechanism 21 and the second runout correction magnetic drive mechanism 22 are arranged in the circumferential direction around the Z axis. In this example, the first runout correction magnetic drive mechanism 21 is arranged in the −X direction of the camera module 2. The second runout correction magnetic drive mechanism 22 is arranged in the −Y direction of the camera module 2.

The movable body 10 rotates around the X axis and around the Y axis by combining the rotation around the first axis R1 and the rotation around the second axis R2. As a result, the optical unit 1 with a runout correction function performs pitching correction around the X axis and yawing correction around the Y axis.

Further, the optical unit 1 with a runout correction function has a rolling correction magnetic drive mechanism 23 that rotates the movable body 10 around the Z axis. As shown in FIG. 3, the first runout correction magnetic drive mechanism 21, the second runout correction magnetic drive mechanism 22, and the rolling correction magnetic drive mechanism 23 are arranged in the circumferential direction around the Z axis. In this example, the rolling correction magnetic drive mechanism 23 is arranged in the + Y direction of the camera module 2. The rolling correction magnetic drive mechanism 23 is located on the opposite side of the second runout correction magnetic drive mechanism 22 with the optical axis L interposed therebetween.

(Fixed point)
In the fixed body 11, the cover 4 and the base 5 are plate-shaped and made of non-magnetic metal. A hook 8 bent at a substantially right angle is formed on the outer peripheral edge of the cover 4 and the base 5 on the side of the case 3. The case 3 is made of resin. The hook 8 is locked to a protrusion 9 provided on the outer peripheral surface of the case 3. The gimbal mechanism 13 and the camera module 2 are arranged inside the opening 4a of the cover 4 and project from the cover 4 in the + Z direction.

The case 3 includes a rectangular frame portion 18 that surrounds the movable body 10 and the rotation support mechanism 12 from the outer peripheral side, and a rectangular wiring accommodating portion 19 that is arranged in the + X direction of the frame portion 18. The frame portion 18 includes a first side plate portion 181 and a second side plate portion 182 facing in the X direction, and a third side plate portion 183 and a fourth side plate portion 184 facing in the Y direction. The first side plate portion 181 is located in the −X direction of the second side plate portion 182. The third side plate portion 183 is located in the −Y direction of the fourth side plate portion 184.

As shown in FIG. 4, the frame portion 18 includes a notch portion 185 having a notched end edge in the −Z direction of the second side plate portion 182. The flexible printed substrate 6 connected to the image pickup device 2b is pulled out from the end portion of the movable body 10 in the −Z direction in the + X direction. The flexible printed substrate 6 is drawn out in the + X direction of the frame portion 18 through the notch portion 185 and is accommodated in the wiring accommodating portion 19.

The wiring accommodating portion 19 includes a fifth side plate portion 191 and a sixth side plate portion 192 facing each other in the Y-axis direction, and a seventh side plate portion 193 facing the second side plate portion 182 of the frame portion 18 in the X-axis direction. The wiring accommodating portion 19 includes a notch portion 194 in which the end edge of the seventh side plate portion 193 in the −Z direction is cut out. The flexible printed substrate 6 is routed in a shape that is folded back a plurality of times inside the wiring accommodating portion 19, and is pulled out to the outside of the wiring accommodating portion 19 through the notch portion 194.

As shown in FIG. 4, the third side plate portion 183 of the case 3 is provided with a first coil fixing hole 183a. The first coil 21C is fixed in the first coil fixing hole 183a. A second coil fixing hole 181a is provided in the first side plate portion 181 of the case 3. The second coil 22C is fixed in the second coil fixing hole 181a. The first coil 21C and the second coil 22C are oval air-core coils long in the circumferential direction. Further, the fourth side plate portion 184 is provided with a third coil fixing hole 184a. A third coil 23C is arranged in the third coil fixing hole 184a. The third coil 23C is an air-core coil long in the Z-axis direction.

As shown in FIG. 3, the first coil 21C fixed to the third side plate portion 183 and the first magnet 21M fixed to the side surface in the −Y direction of the movable body 10 face each other in the Y direction, and the first The magnetic drive mechanism 21 for runout correction is configured. Further, the second coil 22C fixed to the first side plate portion 181 and the second magnet 22M fixed to the side surface in the −X direction of the movable body 10 face each other in the X direction, and are magnetically driven for the second runout correction. It constitutes a mechanism 22. The third coil 23C fixed to the fourth side plate portion 184 and the third magnet 23M fixed to the side surface of the movable body 10 in the + Y direction face each other in the Y direction, and the rolling correction magnetic drive mechanism 23 is provided. Configure.

The first coil 21C, the second coil 22C, and the third coil 23C are electrically connected to the flexible printed circuit board 7. The flexible printed substrate 7 is fixed to the outer peripheral surface of the frame portion 18. In this embodiment, the flexible printed substrate 7 is routed in this order along the outer peripheral surfaces of the fourth side plate portion 184, the first side plate portion 181 and the third side plate portion 183 in the frame portion 18.

The magnetic plate 17 (see FIGS. 1 and 2) is fixed to the flexible printed circuit board 7 at two positions, one at a position overlapping the center of the first coil 21C and the other at a position overlapping the center of the second coil 22C. The magnetic plate 17 overlapping the first coil 21C and the first magnet 21M form a magnetic spring for returning the movable body 10 to a reference angle position in the rotation direction around the X axis. Further, the magnetic plate 17 overlapping the second coil 22C and the second magnet 22M form a magnetic spring for returning the movable body 10 to a reference angle position in the rotation direction around the Y axis. Further, a swing position sensor and a rotation position sensor (not shown) are arranged on the flexible printed substrate 7. The optical unit 1 with a runout correction function acquires the angular positions of the movable body 10 around the X axis, the Y axis, and the Z axis in the rotation direction based on the outputs of these sensors.

(Gimbal mechanism)
5 and 6 are sectional views of an optical unit with a runout correction function. 5 is a cross-sectional view cut at the AA position of FIG. 2, and FIG. 6 is a cross-sectional view cut at the BB position of FIG. FIG. 7 is an exploded perspective view of the gimbal frame 14, the first gimbal frame receiving member 151, and the second gimbal frame receiving member 162.

As shown in FIGS. 3 and 6, the gimbal frame 14 and the fixed body 11 are rotatably connected around the second axis R2 at diagonal positions of the frame portion 18 in the second axis R2 direction, respectively. Connection mechanism 1
6 is provided. The second gimbal frame receiving member 162 is fixed to each of the pair of recesses 161 provided at diagonal positions in the second axis R2 direction of the frame portion 18. As shown in FIGS. 6 and 7, the second gimbal frame receiving member 162 includes a sphere 163 and a second thrust receiving member 164 to which the sphere 163 is fixed. As shown in FIG. 6, by fixing the second gimbal frame receiving member 162 to the recess 161 the sphere 163 is supported by the fixed body 11 at a position on the second axis R2. When assembling the gimbal mechanism 13, the gimbal frame 14 is inserted into the inner peripheral side of the second gimbal frame receiving member 162 and brought into point contact with the sphere 163 on the second axis R2. As a result, the second connection mechanism 16 is configured.

As shown in FIGS. 3 and 5, the gimbal frame 14 and the rotation support mechanism 12 are rotatably connected around the first axis R1 on both sides of the movable body 10 in the direction of the first axis R1, respectively. 1 Connection mechanism 15 is provided. The first connection mechanism 15 includes a first gimbal frame receiving member 151 fixed to the rotation support mechanism 12 on both sides of the movable body 10 in the direction of the first axis R1. As shown in FIGS. 5 and 7, the first gimbal frame receiving member 151 includes a sphere 152 and a first thrust receiving member 153 to which the sphere 152 is fixed. By fixing the first thrust receiving member 153 to the rotation support mechanism 12, the sphere 152 is supported by the rotation support mechanism 12 at a position on the first axis R1. When assembling the gimbal mechanism 13, the gimbal frame 14 is inserted into the inner peripheral side of the first gimbal frame receiving member 151 and brought into point contact with the sphere 152 on the first axis R1. As a result, the first connection mechanism 15 is configured.

The gimbal frame 14 is made of a metal leaf spring. As shown in FIGS. 5, 6 and 7, the gimbal frame 14 has a gimbal frame main body 140 located in the + Z direction of the movable body 10 and both sides of the gimbal frame main body 140 in the direction of the first axis R1. A pair of first-axis side extension portions 141 protruding in the -Z direction, and a pair of second-axis side extension portions protruding in the -Z direction from the gimbal frame main body 140 toward both sides in the second axis R2 direction. A unit 142 is provided. The gimbal frame 14 includes an opening 143 that penetrates the center of the gimbal frame main body 140 in the Z-axis direction.

As shown in FIG. 7, each of the pair of first axis side extension portions 141 is recessed on the first axis R1 in the direction of the first axis R1 toward the inner peripheral side toward the movable body 10. A shaft side concave curved surface 144 is provided. Further, the first axis side extending portion 141 includes a pair of notches 145 in which both edges in the circumferential direction are cut out in the + Z direction of the first axis side concave curved surface 144. Further, the first axis side extending portion 141 includes a protruding portion 146 that protrudes in the −Z direction of the first axis side concave curved surface 144 in the direction toward the outer peripheral side. Next, each of the pair of second axis side extension portions 142 is recessed on the second axis R2 in the direction of the second axis R2 toward the inner peripheral side toward the movable body 10, and is a concave curved surface on the second axis side. 147 is provided. Further, the second axis side extending portion 142 includes a pair of notches 148 having notches on both sides in the circumferential direction in the + Z direction of the second axis side concave curved surface 147.

As shown in FIG. 7, the first thrust receiving member 153 includes a plate portion 154 extending in the Z-axis direction, a foot portion 155 bent from the end portion of the plate portion 154 in the −Z direction toward the movable body 10, and a plate portion. It is provided with a pair of arm portions 156 bent from the side edges on both sides in the circumferential direction of 154 toward the movable body 10. A sphere 152 is fixed to the plate portion 154 by welding. Further, the first thrust receiving member 153 includes a hole portion 157 that penetrates the center of the corner portion connecting the plate portion 154 and the foot portion 155. The tips of the foot portion 155 and the pair of arm portions 156 are fixed to the rotation support mechanism 12 by welding. As will be described later, the rotation support mechanism 12 includes a pair of second extending portions 64 extending in the −Z direction on both sides of the movable body 10 in the first axis R1 direction, and the first gimbal frame receiving member 151 includes a first gimbal frame receiving member 151. The tips of the foot portion 155 and the pair of arm portions 156 are fixed to the tips of the second extension portion 64 by welding.

When assembling the gimbal mechanism 13, the first shaft side extension portion 141 of the gimbal frame 14 is bent toward the inner peripheral side and inserted into the inner peripheral side of the first gimbal frame receiving member 151. As a result, the first axis side extension portion 141 is urged toward the outer peripheral side, so that the first axis side concave curved surface 144 of each first axis side extension portion 141 and the sphere 152 of the first gimbal frame receiving member 151 Can maintain contact. Further, the notch 145 of the first shaft side extending portion 141 is arranged between the pair of arm portions 156, and the protruding portion 146 is arranged in the hole portion 157 (see FIG. 5). This prevents the gimbal frame 14 from coming off the first gimbal frame receiving member 151 in the + Z direction.

The second thrust receiving member 164 includes a plate portion 165 extending in the Z-axis direction, a foot portion 166 bent from the −Z end of the plate portion 165 toward the movable body 10 side, and both sides of the plate portion 165 in the circumferential direction. A pair of arm portions 167 bent from the side edge to the movable body 10 side are provided. A sphere 163 is fixed to the plate portion 165 by welding. Further, a foot bending portion 168 that is bent in the + Z direction from both ends of the foot portion 166 in the circumferential direction is provided. When the second thrust receiving member 164 is fixed to the recess 161 of the case 3, the second thrust receiving member 164 is press-fitted into the recess 161 while bending the foot bending portion 168 toward the center in the circumferential direction.

When assembling the gimbal mechanism 13, the second shaft side extension portion 142 of the gimbal frame 14 is bent toward the inner peripheral side and inserted into the inner peripheral side of the second gimbal frame receiving member 162. As a result, the second axis side extension portion 142 is urged toward the outer peripheral side, so that the second axis side concave curved surface 147 of each second axis side extension portion 142 and the sphere 163 of the second gimbal frame receiving member 162 Can maintain contact. Further, the notch 145 of the second axis side extension portion 142 is arranged between the pair of arm portions 156. This prevents the gimbal frame 14 from coming off the second gimbal frame receiving member 162 in the + Z direction.

(Movable body)
FIG. 8 is a perspective view of the movable body 10 and the rotation support mechanism 12 as viewed from the subject side. FIG. 9 is an exploded perspective view of the movable body 10 and the rotation support mechanism 12. FIG. 10 is a perspective view of the movable body 10 and the rotation support mechanism 12 as viewed from the anti-subject side. As shown in FIGS. 8 and 9, the movable body 10 includes a camera module 2, a frame-shaped holder 24 for holding the camera module 2, and a first member 25 fixed to the holder 24. The holder 24 is made of resin, and the first member 25 is made of metal.

As shown in FIGS. 8 and 9, the first member 25 has a first annular plate portion 26 that surrounds the optical axis L and overlaps the outer peripheral portion of the camera module 2 from the + Z direction, and from the first annular plate portion 26 to the outer peripheral side. A first extending portion 27 that is bent in the −Z direction and connected to the holder 24 on the outer peripheral side of the projecting camera module 2 is provided. In this embodiment, the rotation support mechanism 12 is arranged in the gap between the first annular plate portion 26 and the camera module 2 in the Z-axis direction (optical axis L direction).

The first extending portion 27 is arranged at three positions of the first annular plate portion 26 in the −X direction, the + Y direction, and the −Y direction. The angle position where the first extension portion 27 is arranged is the angle at which the first magnet 21M and the second magnet 22M of the runout correction magnetic drive mechanism 20 and the third magnet 23M of the rolling correction magnetic drive mechanism 23 are arranged. The position. The first extension portion 27 is a first extension portion 28 extending from the first annular plate portion 26 toward the outer peripheral side and bending in the −Z direction, and a first extension portion 28 in the −Z direction. It is provided with a rectangular first extending portion second portion 29 which is connected to the tip of the first extending portion and has a width wider in the circumferential direction than the first extending portion first portion 28. The second portion 29 of the first extension portion is fixed to the holder 24.

The first member 25 includes an annular first rail member 50 that surrounds the optical axis L, and a sheet metal first plate-shaped member 51 to which the first rail member 50 is joined. The first plate-shaped member 51 is made of magnetic metal. The first rail member 50 is made of a non-magnetic metal. The first rail member 50 may be made of magnetic metal. The first rail member 50 is fitted inside a circular first through hole 52 provided in the first plate-shaped member 51, and is fixed to the first plate-shaped member 51 by welding. More specifically, the first rail member 50 and the first plate-shaped member 51 are welded so that the opening edge of the first through hole 52 and the outer peripheral edge of the first rail member 50 are connected in the radial direction. There is. Welding is performed at a plurality of locations at equal intervals around the Z axis.

As shown in FIGS. 5 and 6, a first annular groove 53 is provided on the end face of the first rail member 50 in the −Z direction. In this embodiment, the first annular groove 53 is formed by cutting. The first rail member 50 may be a member in which the first annular groove 53 is formed by a method other than cutting. For example, the first annular groove 53 may be formed by cold forging or press working. The inner peripheral portion of the first annular plate portion 26 is composed of the first rail member 50, and the outer peripheral portion is composed of the first plate-shaped member 51. Therefore, the first annular plate portion 26 includes a first annular groove 53 that surrounds the optical axis L.

As shown in FIG. 9, the camera module 2 includes a camera module main body 30A and a camera module cylindrical portion 30B projecting from the center of the camera module main body 30A in the + Z direction. The lens 2a (see FIGS. 5 and 6) is housed in the camera module cylindrical portion 30B. The holder 24 surrounds the camera module main body 30A from the outer peripheral side. The camera module cylindrical portion 30B protrudes in the + Z direction from the circular hole 26a provided in the center of the first annular plate portion 26, and is arranged in the opening 143 of the gimbal frame 14.

The outline shape of the camera module main body 30A and the holder 24 when viewed from the + Z direction is substantially octagonal. The holder 24 includes a first side wall 31 and a second side wall 32 extending parallel to the Y direction, and a third side wall 33 and a fourth side wall 34 extending parallel to the X direction. The first side wall 31 is located in the −X direction of the second side wall 32. The third side wall 33 is located in the −Y direction of the fourth side wall 34. A notch 32a is provided at the end edge of the second side wall 32 in the −Z direction. As shown in FIG. 4, the flexible printed circuit board 6 connected to the image pickup device 2b is pulled out from the end portion of the camera module 2 in the −Z direction through the notch portion 32a in the + X direction of the movable body 10. ..

Further, the holder 24 includes a fifth side wall 35 and a sixth side wall 36 located diagonally in the first axis R1 direction, and a seventh side wall 37 and an eighth side wall 38 located diagonally in the second axis R2 direction. .. The fifth side wall 35 is located in the −X direction of the sixth side wall 36. The seventh side wall 37 is located in the −X direction of the eighth side wall 38. A stopper protrusion 39 projecting in the + Z direction is formed on the end faces of the fifth side wall 35, the sixth side wall 36, the seventh side wall 37, and the eighth side wall 38 in the + Z direction.

The first magnet 21M is fixed to the first side wall 31 of the holder 24, and the second magnet 22M is fixed to the third side wall 33. The first magnet 21M and the second magnet 22M are magnetized in two poles in the Z-axis direction. The polarization lines of the first magnet 21M and the second magnet 22M extend in the circumferential direction. The first magnet 21M and the second magnet 22M are arranged so that the same poles are directed in the Z-axis direction. A third magnet 23M is fixed to the fourth side wall 34 of the holder 24. The third magnet 23M is extremely magnetized in the circumferential direction. The first magnet 21M, the second magnet 22M, and the third magnet 23M are arranged in the circumferential direction around the optical axis L. The third magnet 23M is arranged on the side opposite to the second magnet 22M with the optical axis L interposed therebetween.

As shown in FIG. 9, recesses 40 recessed on the inner peripheral side are formed on the outer peripheral surfaces of the first side wall 31, the third side wall 33, and the fourth side wall 34 of the holder 24, and the first magnet 21M, the first magnet 21M, is formed. The two magnets 22M and the third magnet 23M are housed in the recess 40. The first magnet 21M, the second magnet 22M, and the third magnet 23M are positioned in the Z-axis direction by abutting the bottom surface 41 provided at the end of each recess 40 in the −Z direction from the + Z direction.

Grooves 42 are formed on the inner surfaces of the three recesses 40 on both sides in the circumferential direction. As shown in FIGS. 3 and 8, the second portion 29 of the first extension portion 29 provided at the tip of the first extension portion 27 in the −Z direction is inserted into each recess 40. Both ends of the first extending portion 2nd portion 29 in the circumferential direction are inserted into the groove portion 42, and are fixed to each recess 40 by an adhesive. The second portion 29 of the first extension portion is inserted inside the first magnet 21M, the second magnet 22M, and the third magnet 23M in the radial direction. Since the first extending portion second portion 29 is made of magnetic metal, it functions as a yoke for each magnet.

(Rotation support mechanism)
The rotation support mechanism 12 is a second member having a first annular groove 53 provided on the movable body 10 in a state coaxial with the optical axis L and a second annular groove 54 facing the first annular groove 53 in the Z-axis direction. It is equipped with 55. Further, the rotation support mechanism 12 rolls a plurality of rolling elements 56 that are inserted into the first annular groove 53 and the second annular groove 54 and roll between the movable body 10 and the second member 55, and the rolling body 56. It is provided with an annular retainer 57 that is movably held. The retainer 57 includes a plurality of spherical holding holes 58 that rotatably hold each of the plurality of rolling elements 56. Further, the rotation support mechanism 12 includes a pressurization mechanism 59 that applies a force that brings the first annular groove 53 and the second annular groove 54 close to each other in the Z-axis direction.

As shown in FIG. 9, the second member 55 includes an annular second rail member 60 surrounding the optical axis L and a sheet metal second plate-shaped member 61 to which the second rail member 60 is joined. The second rail member 60 is fitted inside a circular second through hole 62 provided in the second plate-shaped member 61, and is fixed to the second plate-shaped member 61 by welding. More specifically, in the second rail member 60 and the second plate-shaped member 61, the opening edge of the second through hole 62 and the outer peripheral edge of the second rail member 60 are welded from the −Z direction. Welding is performed at a plurality of locations at equal intervals around the Z axis.

The second annular groove 54 is provided on the end face of the second rail member 60 in the + Z direction. In this embodiment, the second annular groove 54 is formed by cutting. The second rail member 60 and the second plate-shaped member 61 are both made of non-magnetic metal. The second rail member 60 may be made of magnetic metal. The second rail member 60 and the first rail member 50 are the same member. As shown in FIGS. 5 and 6, the second rail member 60 and the first rail member 50 are arranged coaxially, and the first annular groove 53 and the second annular groove 54 face each other in the Z-axis direction. ing.

The rolling element 56 is made of metal or ceramics. The retainer 57 is made of resin. The retainer 57 is located between the first rail member 50 and the second rail member 60 in the Z-axis direction. In this embodiment, the rolling element 56 is a sphere. The rotation support mechanism 12 includes six rolling elements 56, and the retainer 57 includes six spherical holding holes 58 provided at equal intervals. The rolling element 56 is rotatably held inside the sphere holding hole 58 and projects from the retainer 57 in the −Z direction and the + Z direction.

The second member 55 includes a second annular plate portion 63 that surrounds the optical axis L, a pair of second extending portions 64 that project from the second annular plate portion 63 on both sides in the direction of the first axis R1, and a second annular plate. A pair of second protruding plate portions 65 projecting from the portions 63 on both sides in the direction of the second axis R2 is provided. The inner peripheral portion of the second annular plate portion 63 is composed of the second rail member 60, and the outer peripheral portion is composed of the second plate-shaped member 61. As shown in FIGS. 5, 6 and 8, the second annular plate portion 63 and the retainer 57 are located in the gap between the first annular plate portion 26 of the first member 25 and the camera module main body portion 30A in the optical axis L direction. Be placed.

The pair of second extending portions 64 each have a second extending portion 1st portion 66 extending from the second annular plate portion 63 in the first axis R1 direction and a second extending portion 66 extending from the outer peripheral side of the movable body 10 in the Z axis direction. 2 The extension portion 2nd portion 67 is provided. As shown in FIG. 5, the second extension portion 67 faces the movable body 10 with a slight gap on the outside in the direction of the first axis R1 of the movable body 10. As shown in FIGS. 5 and 8, the first gimbal frame receiving member 151 is fixed to the surface of each second extending portion second portion 67 on the surface opposite to the movable body 10. The first gimbal frame receiving member 151 is fixed to the second extension portion 67 by welding the tips of the pair of arm portions 156 and the foot portion 155 to the second extension portion second portion 67. ..

As shown in FIGS. 8 and 9, the pressurization mechanism 59 includes a pressurization magnet 68 arranged at four locations around the optical axis L of the second member 55 and four locations around the optical axis L of the first member 25. The first protruding plate portion 69 provided in the above is provided. The pressurizing magnet 68 is fixed to four points, a pair of second extending portions 1st portion 66 and a pair of second protruding plate portions 65. Each pressurizing magnet 68 is magnetized in two poles in the circumferential direction. The first protruding plate portion 69 projects from the first annular plate portion 26 in four directions, both sides in the direction of the first axis R1 and both sides in the direction of the second axis R2. Each of the four pressurizing magnets 68 arranged on the second member 55 together with the four first projecting plate portions 69 provided on the movable body 10 when the movable body 10 and the rotation support mechanism 12 are assembled. It overlaps in the L direction of the optical axis.

The first protruding plate portion 69 is made of a magnetic metal. Therefore, due to the magnetic attraction of the pressurizing magnet 68, the first protruding plate portion 69 that overlaps each pressurizing magnet 68 in the optical axis L direction is attracted to the pressurizing magnet 68 side. As a result, the pressurization mechanism 59 applies a force that causes the first annular groove 53 and the second annular groove 54 to approach each other in the Z-axis direction at four locations at equal angular intervals around the optical axis L. The movable body 10 is attracted to the second member 55 by the magnetic attraction force of the pressurization mechanism 59, and is supported by the second member 55 in a state of being rotatable around the Z axis.

The pair of second extending portions 64 and the pair of second protruding plate portions 65 provided on the second member 55 face the stopper convex portions 39 provided on the holder 24 in the optical axis L direction. As shown in FIGS. 5 and 6, the tip of the stopper convex portion 39 in the + Z direction protrudes in the + Z direction from the end face of the camera module main body 30A in the + Z direction. Therefore, the movement range of the second member 55 in the −Z direction is restricted by the stopper protrusion 39.

As shown in FIG. 8, the height of the first side wall 31, the second side wall 32, the third side wall 33, and the fourth side wall 34 in the Z-axis direction is lower than that of the camera module main body portion 30A. As shown in FIG. 10, the holder 24 includes a convex portion 43 protruding in the −Z direction from the end faces of the first side wall 31, the third side wall 33, and the fourth side wall 34 in the −Z direction. The convex portion 43 is located at the center of the first side wall 31, the third side wall 33, and the fourth side wall 34 in the circumferential direction. The convex portion 43 projects in the −Z direction from the bottom surface (the surface facing the −Z direction) of the camera module main body 30A. Therefore, when the movable body 10 moves significantly in the Z-axis direction as a whole due to a drop impact or the like, the convex portion 43 collides with the fixed body 11 before the camera module main body portion 30A.

The convex portion 43 is among the eight side walls arranged in the circumferential direction surrounding the camera module main body 30A, among the side walls arranged at an angle position between the first axis R1 direction and the second axis R2 direction. It is formed at three locations (first side wall 31, third side wall 33, and fourth side wall 34). Further, the convex portion 43 is formed at the center of the first side wall 31, the third side wall 33, and the fourth side wall 34 in the circumferential direction. Therefore, in the holder 24, the convex portion 43 is formed at a position where the distance from the optical axis L is the smallest and the amount of movement in the Z-axis direction is the smallest when the movable body 10 swings.

As shown in FIG. 10, the side surfaces 43a on both sides of the convex portion 43 in the circumferential direction are tapered surfaces inclined in the −Z direction toward the center of the circumferential direction. Therefore, the convex portion 43 has a shape having a large width in the circumferential direction and high strength, but has a shape in which the protrusion amount is smaller as the movement amount in the Z-axis direction is larger when the movable body 10 swings. Therefore, it is not necessary to increase the gap between the movable body 10 and the fixed body 11 in the optical axis L direction in order to prevent the convex portion 43 from colliding with the fixed body 11 when the movable body 10 is swung. ..

As shown in FIG. 10, the fifth side wall 35, the sixth side wall 36, the seventh side wall 37, and the eighth side wall 38 of the holder 24 have end faces in the −Z direction in the + Z direction from the bottom surface of the camera module main body 30A. To position. Therefore, the outer shape of the movable body 10 is a diagonal portion in the direction of the first axis R1 and a second.
The end of the diagonal portion in the axis R2 direction in the −Z direction is recessed in the + Z direction. Since the diagonal portion in the first axis R1 direction and the diagonal portion in the second axis R2 direction of the movable body 10 are the portions farthest from the optical axis L, this portion is cut out in the Z axis direction. As a result, the movable space of the movable body 10 in the Z-axis direction when the movable body 10 swings around the first axis R1 and the second axis R2 can be reduced.

The rotation support mechanism 12 includes a rotation regulation mechanism 70 that regulates the rotation range of the movable body 10 around the optical axis L. As shown in FIG. 8, the rotation regulation mechanism 70 includes a first rotation regulation unit 71 provided on the first member 25 and a second rotation regulation unit 72 provided on the second member 55. The first rotation restricting portion 71 projects from the first annular plate portion 26 toward the outer peripheral side and bends in the −Z direction. The tip of the first rotation restricting portion 71 in the −Z direction is fixed to the second side wall 32 of the holder 24.

The second rotation restricting portion 72 projects from the second annular plate portion 63 toward the outer peripheral side. A notch 73 having a width larger in the circumferential direction than the second rotation restricting portion 72 is provided in the center of the first rotation regulating portion 71 in the circumferential direction, and the second rotation regulating portion 72 is arranged in the notch portion 73. Will be done. Therefore, the first rotation restricting unit 71 surrounds both sides of the second rotation restricting unit 72 in the circumferential direction. When the first rotation restricting unit 71 and the second rotation restricting unit 72 collide with each other, the rotation range of the movable body 10 with respect to the second member 55 around the optical axis L is restricted.

(Main action and effect of this form)
As described above, the optical unit 1 with the shake correction function of the present embodiment has a movable body 10 including the camera module 2 and a rotational support mechanism 12 that rotatably supports the movable body 10 about the optical axis L of the camera module 2. The rotary support mechanism 12 is rotatably supported around the first axis R1 intersecting the optical axis L, and the rotary support mechanism 12 is rotatable around the second axis R2 intersecting the optical axis L and the first axis R1. It has a gimbal mechanism 13 that supports the movable body 10 and a fixed body 11 that supports the movable body 10 via the gimbal mechanism 13 and the rotation support mechanism 12. The movable body 10 includes a resin holder 24 that surrounds the outer peripheral side of the camera module 2, and a first metal member 25 that is fixed to the holder 24. The first member 25 includes a first annular plate portion 26 that surrounds the optical axis L and overlaps with the camera module 2 when viewed from the optical axis L direction, and a first extending portion 27 that connects the first annular plate portion 26 and the holder 24. And prepare. The rotation support mechanism 12 has a second annular plate portion formed with a first annular groove 53 formed in the first annular plate portion 26 and a second annular groove 54 facing the first annular groove 53 in the optical axis L direction. A second member 55 provided with 63 and rotatably supported around the first axis R1 by the gimbal mechanism 13, and a first annular plate portion 26 and a second annular plate portion 26 inserted into the first annular groove 53 and the second annular groove 54. A plurality of rolling elements 56 that roll with and from the annular plate portion 63 are provided. The runout correction magnets (first magnet 21M, second magnet 22M) of the runout correction magnetic drive mechanism 20 that rotates the movable body 10 around the first axis R1 and the second axis R2 are fixed to the holder 24. .. The first extending portion 27 is made of magnetic metal and is fixed to the inner peripheral side of the runout correction magnet.

In this embodiment, the movable body 10 includes a resin holder 24 that surrounds the outer peripheral side of the camera module 2, and a first metal member 25 that is fixed to the holder 24. The first member 25 is an optical axis. A magnetic metal that connects the first annular plate portion 26 that surrounds L and overlaps with the camera module 2 when viewed from the optical axis L direction, the first annular plate portion 26, and the holder 24, and is fixed to the inner peripheral side of the runout correction magnet. It is provided with a first extension 27 made of a product. Therefore, since the rail into which the rolling element 56 of the rotation support mechanism 12 is inserted and the yoke for the magnet of the magnetic drive mechanism 20 for runout correction are integrated in the first member 25, the number of parts can be reduced and the movable body can be moved. It is possible to improve the assemblability of the 10 and the rotation support mechanism 12 and reduce the cost. Further, by integrating the yoke with the first member 25, the position accuracy of the yoke can be improved. Further, since the holder 24 is made of resin, the strength can be ensured without providing the end plate portion extending to the inner peripheral side at the end portion in the optical axis L direction unlike the holder 24 made of sheet metal. Therefore, the height of the movable body 10 in the optical axis L direction can be lowered.

In the present embodiment, the runout correction magnetic drive mechanism 20 has a first runout correction magnetic drive mechanism 21 that rotates the movable body 10 around the first axis R1 and a second runout that rotates the movable body 10 around the second axis R2. A correction magnetic drive mechanism 22 is provided. The runout correction magnet includes a first magnet 21M of the first runout correction magnetic drive mechanism 21 and a second magnet 22M of the second runout correction magnetic drive mechanism 22. The third magnet 23M of the rolling correction magnetic drive mechanism 23 that rotates the movable body 10 around the optical axis L is fixed to the holder 24, and the first magnet 21M, the second magnet 22M, and the third magnet 23M are optical. The first extending portion 27 is arranged in the circumferential direction around the axis L, and the first extending portion 27 is on the inner peripheral side of the first magnet 21M, the inner peripheral side of the second magnet 22M, and the inner peripheral side of the third magnet 23M. Fixed in position. Therefore, since the yokes for the magnets of the runout correction magnetic drive mechanism 20 and the rolling correction magnetic drive mechanism 23 are all integrated in the first member 25, the number of parts can be reduced, and the movable body 10 and the rotation support mechanism 12 can be reduced in number. It is possible to improve the assemblability and reduce the cost. In addition, the position accuracy of the yoke can be improved.

In the present embodiment, the second member 55 has a pair of second extending portions 64 protruding from the second annular plate portion 63 on both sides in the first axis R1 direction, and the second annular plate portion 63 in the second axis R2 direction. A pair of second projecting plate portions 65 projecting to both sides of the above are provided, and the pair of second extending portions 64 are connected to the gimbal mechanism 13. The second annular plate portion 63 is arranged in the gap between the first annular plate portion 26 and the camera module 2 in the optical axis L direction. At the diagonal position in the first axis R1 direction and the diagonal position in the second axis R2 direction of the holder 24, a protrusion for a stopper facing the second member 55 in the optical axis L direction is provided. In such a configuration, the first annular plate portion 26 functions as a stopper member that restricts the second annular plate portion 63 from coming off. Therefore, since it is not necessary to separately stack and arrange the stopper member overlapping with the second annular plate portion 63 in the optical axis L direction, the height of the rotation support mechanism 12 in the optical axis L direction can be lowered. Therefore, the height of the optical unit 1 with the shake correction function in the optical axis L direction can be lowered. Further, it is possible to restrict the separation of the second annular plate portion 63 provided on the second member 55 from the first annular plate portion 26 by the convex portion for the stopper. Further, since the holder 24 is made of resin, it is easy to form a complicated uneven shape as compared with the case made of sheet metal. Therefore, it is easy to manufacture the holder 24 provided with the convex portion for the stopper.

In this embodiment, the first annular plate portion 26 and the second annular plate portion 63 overlap with the camera module 2 from the + Z direction (that is, one side in the optical axis L direction). The diagonal portion of the holder 24 in the first axis R1 direction and the diagonal portion of the holder 24 in the second axis R2 direction have a camera module 2 at the end in the −Z direction (that is, the other side in the optical axis L direction). It is dented in the + Z direction. As a result, when the movable body 10 swings around the first axis R1 and the second axis R2, the height of the space in which the movable body 10 moves in the optical axis L direction can be reduced, so that it has a runout correction function. The product height in the optical axis L direction of the optical unit 1 can be reduced. Further, since the holder 24 is made of resin, it is easy to form a complicated uneven shape as compared with the case made of sheet metal. Therefore, it is easy to manufacture the holder 24 having a shape in which the diagonal portion in the first axis R1 direction and the diagonal portion in the second axis R2 direction are recessed.

The holder 24 of the present embodiment includes a plurality of side walls (first side wall 31 to eighth side wall 38) arranged in the circumferential direction around the camera module 2. Of the plurality of side walls, three of the four side walls (first side wall 31, third side wall 33, and fourth side wall) arranged at an angle position between the first axis R1 direction and the second axis R2 direction. 34) is provided with a convex portion 43 projecting from the camera module 2 on the other side in the optical axis L direction. By doing so, when the movable body 10 collides with the fixed body 11 due to the drop impact, the impact is applied to the convex portion 43, so that it is possible to avoid directly applying the impact to the camera module 2. The holder may have a shape in which a convex portion 43 is provided at at least one position at an angle position between the first axis R1 direction and the second axis R2 direction.

In the present embodiment, the convex portion 43 is arranged at the center of each side wall in the circumferential direction, and the position where the distance from the optical axis L is the smallest in the holder 24, that is, the optical axis L when the movable body 10 swings. The convex portion 43 is arranged at a position where the amount of movement in the direction is the smallest. Therefore, the gap between the movable body 10 and the fixed body 11 in the optical axis L direction, which is necessary to prevent the convex portion 43 from colliding with the fixed body 11 when the movable body 10 is swung, is small. Therefore, it is possible to avoid an increase in the product height in the optical axis L direction of the optical unit with a runout correction function due to the provision of the convex portion 43.

In the present embodiment, the side surfaces 43a on both sides of the convex portion 43 in the circumferential direction are tapered surfaces that incline toward the other side in the optical axis L direction toward the center of the convex portion 43 in the circumferential direction. Therefore, the convex portion 43 has a shape having a large width in the circumferential direction of the base end portion connected to the side wall, and therefore has high strength. Further, the shape in which the side surfaces 43a on both sides in the circumferential direction are tapered surfaces has a shape in which the protrusion amount is smaller as the movement amount in the optical axis L direction is larger when the movable body 10 swings. Therefore, the gap between the movable body 10 and the fixed body 11 in the optical axis L direction, which is necessary to prevent the convex portion 43 from colliding with the fixed body 11 when the movable body 10 is swung, is small. Therefore, it is possible to avoid an increase in the product height in the optical axis L direction of the optical unit with a runout correction function due to the provision of the convex portion 43.

In the present embodiment, the rotation support mechanism 12 includes a pressurization mechanism 59 that applies a force that causes the first annular groove 53 and the second annular groove 54 to approach each other in the L direction of the optical axis. The pressurization mechanism 59 includes a first projecting plate portion 69 projecting from the first annular plate portion 26 toward the outer peripheral side, a pressurizing magnet 68 fixed to a part of the second member 55 around the optical axis L in the circumferential direction. To prepare for. The first protruding plate portion 69 is made of magnetic metal and is attracted to the pressurizing magnet 68. With such a configuration, the parts of the pressurization mechanism 59 can be integrated with the first member 25, so that the number of parts can be reduced and the assembling property can be improved. Further, by mounting the pressurizing magnet 68 on the second member 55 that rotates relative to the movable body 10 and providing the movable body 10 with the first protruding plate portion 69 attracted by the pressurizing magnet 68, the movable body 10 is provided. It is possible to prevent the rotation position of the first projecting plate portion 69 from being displaced by being attracted by the magnets of the runout correction magnetic drive mechanism 20 and the rolling correction magnetic drive mechanism 23 mounted on the above. Therefore, it is possible to prevent the pressurization mechanism 59 from being interfered with by the runout correction magnetic drive mechanism 20 and the rolling correction magnetic drive mechanism 23. Further, the pressurization mechanism 59 can define the angular position of the movable body 10 around the optical axis L.

In this embodiment, a rotation regulating mechanism 70 that regulates a rotation range around the optical axis L of the movable body 10 is provided, and the rotation regulating mechanism 70 includes a first rotation regulating portion 71 formed on the first member 25 and a second member. A second rotation restricting unit 72 formed in 55 is provided. The first rotation restricting unit 71 surrounds both sides of the second rotation restricting unit 72 in the circumferential direction. With such a configuration, the rotation restricting mechanism 70 can be completed between the first member 25 and the second member 55, and there is no stopper member that overlaps the first member 25 and the second member 55 in the optical axis L direction. Can also configure the rotation control mechanism 70. Therefore, the height of the rotation support mechanism 12 in the optical axis L direction can be lowered. Further, since the rotation regulation mechanism 70 can be configured with a small number of parts, it is possible to suppress a decrease in dimensional accuracy of the rotation regulation mechanism 70 due to the accumulation of component tolerances. Therefore, the rotation range of the movable body 10 can be accurately regulated.

In this embodiment, the first rotation restricting portion 71 extends from the first annular plate portion 26 toward the outer peripheral side and is fixed to the holder 24, and the second rotation regulating portion 72 is a central portion in the circumferential direction of the first rotation regulating portion 71. Is placed in the notch. As a result, the connecting portion connecting the first annular plate portion 26 and the holder 24 can be used as the first rotation restricting portion 71, so that the shape of the first member 25 can be simplified.

(Modification example)
(1) In the above embodiment, the first rotation regulating unit 71 surrounds both sides of the second rotation regulating unit 72 in the circumferential direction, but the second rotation regulating unit 72 surrounds both sides of the first rotation regulating unit 71 in the circumferential direction. You may adopt the structure which surrounds. For example, a notch 73 is formed in the center of the second rotation restricting portion 72 in the circumferential direction, and the first rotation regulating portion 71 is arranged in the notch 73. That is, the rotation regulating mechanism 70 may have a configuration in which one of the first rotation regulating unit 71 and the second rotation regulating unit 72 surrounds both sides of the first rotation regulating unit 71 and the second rotation regulating unit 72 in the circumferential direction. Just do it.

(2) In the above embodiment, the first rotation restricting unit 71 is provided on the first member 25, but the first rotation restricting unit 71 may adopt a configuration provided on the holder 24. For example, a configuration may be adopted in which the rotation of the movable body 10 is restricted by forming a convex portion protruding in the + Z direction on the end surface of the holder 24 in the + Z direction and colliding with the second rotation restricting portion 72 in the circumferential direction. .. That is, the rotation restricting mechanism 70 includes a first rotation restricting portion 71 formed on the first member 25 or the holder 24, and a second rotation regulating portion 72 extending from the second annular plate portion 63 to the outer peripheral side. All you need is.

(3) In the above embodiment, the pressurization mechanisms 59 are provided at four locations around the optical axis L, but may be provided at two locations on the opposite side of the optical axis L.

(Other embodiments)
(A) In the above embodiment, the portion of the first annular plate portion 26 in which the first annular groove 53 is formed is a separate part (first rail member 50) from the first plate-shaped member 51, but the first rail. The member 50 and the first plate-shaped member 51 may be integrated. That is, the first member 25 may be a single component including a first rail portion provided with the first annular groove 53 and a first plate-shaped portion extending from the first rail portion to the outer peripheral side. Similarly, the second member 55 may be a single component having a second rail portion provided with the second annular groove 54 and a second plate-shaped portion extending from the second rail portion to the outer peripheral side. .. In this case, the first annular groove 53 and the second annular groove 54 can be formed by a processing method such as cold forging, pressing, or cutting.

(B) In the above embodiment, the rotation support mechanism 12 has a second member 55 in the gap between the first annular plate portion 26 of the first member 25 constituting the movable body 10 and the camera module 2 in the optical axis L direction. Although the configuration is such that the annular plate portion 63 is arranged, a configuration in which the arrangement of the first annular plate portion 26 and the second annular plate portion 63 in the optical axis L direction may be reversed may be adopted.

1 ... Optical unit with shake correction function, 2 ... Camera module, 2a ... Lens, 2b ... Image pickup element, 3 ... Case, 4 ... Cover, 4a ... Opening, 5 ... Base, 6 ... Flexible print board, 7 ... Flexible print Board, 8 ... hook, 9 ... protrusion, 10 ... movable body, 11 ... fixed body, 12 ... rotation support mechanism, 13 ... gimbal mechanism, 14 ... gimbal frame, 15 ... first connection mechanism, 16 ... second connection mechanism, 17 ... Magnetic plate, 18 ... Frame part, 19 ... Wiring accommodating part, 20 ... Magnetic drive mechanism for runout correction, 21 ... Magnetic drive mechanism for first runout correction, 21C ... First coil, 21M ... First magnet, 22 ... 2nd runout correction magnetic drive mechanism, 22C ... 2nd coil, 22M ... 2nd magnet, 23 ... Rolling correction magnetic drive mechanism, 23C ... 3rd coil, 23M ... 3rd magnet, 24 ... holder, 25 ... 1st Member, 26 ... 1st annular plate part, 26a ... Circular hole, 27 ... 1st extension part, 28 ... 1st extension part 1st part, 29 ... 1st extension part 2nd part, 30A ... Camera module main body Part, 30B ... Camera module cylindrical part, 31 ... 1st side wall, 32 ... 2nd side wall, 32a ... Notch part, 33 ... 3rd side wall, 34 ... 4th side wall, 35 ... 5th side wall, 36 ... 6th side wall , 37 ... 7th side wall, 38 ... 8th side wall, 39 ... stopper convex, 40 ... concave, 41 ... bottom surface, 42 ... groove, 43 ... convex, 43a ... side surface, 50 ... first rail member, 51 ... 1st plate-shaped member, 52 ... 1st through hole, 53 ... 1st annular groove, 54 ... 2nd annular groove, 55 ... 2nd member, 56 ... rolling element, 57 ... retainer, 58 ... spherical holding hole, 59 ... Pressurizing mechanism, 60 ... second rail member, 61 ... second plate-shaped member, 62 ... second through hole, 63 ... second annular plate portion, 64 ... second extending portion, 65 ... second protruding plate portion, 66 ... 2nd extension part 1st part, 67 ... 2nd extension part 2nd part, 68 ... pressurizing magnet, 69 ... first protruding plate part, 70 ... rotation regulation mechanism, 71 ... first rotation regulation part, 72 ... 2nd rotation restricting part, 73 ... notch part, 140 ... gimbal frame main body part, 141 ... first axis side extension part, 142 ... second axis side extension part, 143 ... opening, 144 ... first Axial concave curved surface, 145 ... notch, 146 ...
Projection part, 147 ... Second axis side concave curved surface, 148 ... Notch, 151 ... First gimbal frame receiving member, 152 ... Sphere, 153 ... First thrust receiving member, 154 ... Plate part, 155 ... Foot part, 156 ... Arm, 157 ... Hole, 161 ... Recess, 162 ... Second gimbal frame receiving member, 163 ... Sphere, 164 ... Second thrust receiving member, 165 ... Plate, 166 ... Foot, 167 ... Arm, 168 ... Foot bending part, 181a ... 2nd coil fixing hole, 181 ... 1st side plate part, 182 ... 2nd side plate part, 183a ... 1st coil fixing hole, 183 ... 3rd side plate part, 184a ... 3rd coil fixing hole, 184 ... 4th side plate part, 185 ... notch part, 191 ... 5th side plate part, 192 ... 6th side plate part, 193 ... 7th side plate part, 194 ... notch part, L ... optical axis, R1 ... 1st axis , R2 ... 2nd axis

Claims (10)

A movable body including a camera module, a rotation support mechanism that rotatably supports the movable body about the optical axis of the camera module, and a rotation support mechanism that can rotate around a first axis that intersects the optical axis. A gimbal mechanism that supports and rotatably supports the rotary support mechanism around a second axis that intersects the optical axis and the first axis, and supports the movable body via the gimbal mechanism and the rotary support mechanism. With a fixed body,
The movable body includes a resin holder that surrounds the outer peripheral side of the camera module, and a first metal member that is fixed to the holder.
The first member includes a first annular plate portion that surrounds the optical axis and overlaps with the camera module when viewed from the optical axis direction, and a first extending portion that connects the first annular plate portion and the holder. Equipped with
The rotation support mechanism is
The first annular groove formed in the first annular plate portion and
A second member having a second annular plate portion formed with the first annular groove and the second annular groove facing in the optical axis direction and rotatably supported around the first axis by the gimbal mechanism.
A plurality of rolling elements inserted into the first annular groove and the second annular groove and rolled between the first annular plate portion and the second annular plate portion are provided.
A runout correction magnet of a runout correction magnetic drive mechanism that rotates the movable body around the first axis and the second axis is fixed to the holder.
An optical unit with a runout correction function, wherein the first extension portion is made of a magnetic metal and is fixed to the inner peripheral side of the runout correction magnet. The runout correction magnetic drive mechanism includes a first runout correction magnetic drive mechanism that rotates the movable body around the first axis, and a second runout correction magnetic drive mechanism that rotates the movable body around the second axis. Equipped with
The runout correction magnet includes a first magnet of the first runout correction magnetic drive mechanism and a second magnet of the second runout correction magnetic drive mechanism.
A third magnet of a magnetic drive mechanism for rolling correction that rotates the movable body around the optical axis is fixed to the holder.
The first magnet, the second magnet, and the third magnet are arranged in the circumferential direction around the optical axis.
The first extension is characterized in that it is fixed at each position on the inner peripheral side of the first magnet, the inner peripheral side of the second magnet, and the inner peripheral side of the third magnet. The optical unit with a runout correction function according to 1. The second member is a pair of second extending portions projecting from the second annular plate portion to both sides in the first axial direction, and projecting from the second annular plate portion to both sides in the second axial direction. A pair of second protruding plate portions are provided, and the pair of second extending portions are connected to the gimbal mechanism.
The second annular plate portion is arranged in the gap in the optical axis direction between the first annular plate portion and the camera module.
The holder is provided with a stopper convex portion that faces the second member in the optical axis direction at the diagonal position in the first axis direction and the diagonal position in the second axis direction. The optical unit with a shake correction function according to claim 1 or 2. The first annular plate portion and the second annular plate portion overlap with the camera module from one side in the optical axis direction.
The diagonal portion of the holder in the first axis direction and the diagonal portion of the holder in the second axis direction have the other end in the optical axis direction in the optical axis direction with respect to the camera module. The optical unit with a runout correction function according to any one of claims 1 to 3, wherein the optical unit is recessed on one side. The first annular plate portion and the second annular plate portion overlap with the camera module from one side in the optical axis direction.
The holder comprises a plurality of side walls arranged circumferentially around the camera module.
Of the plurality of side walls, at least one of the side walls arranged at an angle position between the first axis direction and the second axis direction is located on the other side of the camera module in the optical axis direction. The optical unit with a runout correction function according to any one of claims 1 to 4, wherein a protruding convex portion is provided. The optical unit with a runout correction function according to claim 5, wherein the convex portion is arranged at the center of the side wall in the circumferential direction. The sixth aspect of claim 6 is characterized in that the side surfaces on both sides of the convex portion in the circumferential direction are tapered surfaces that incline toward the other side in the optical axis direction toward the center of the convex portion in the circumferential direction. Optical unit with runout correction function. The rotation support mechanism includes a pressurization mechanism that applies a force that causes the first annular groove and the second annular groove to approach each other in the optical axis direction.
The pressurization mechanism includes a first projecting plate portion protruding from the first annular plate portion toward the outer peripheral side, and a pressurizing magnet fixed to a part of the second member in the circumferential direction around the optical axis. ,
The optical unit with a runout correction function according to any one of claims 1 to 7, wherein the first protruding plate portion is made of a magnetic metal and is attracted by the pressurizing magnet. A rotation regulating mechanism for regulating the rotation range of the movable body around the optical axis is provided.
The rotation regulation mechanism is
The first rotation restricting portion formed on the first member or the holder, and
A second rotation restricting portion formed on the second member is provided.
Claims 1 to 8, wherein one of the first rotation regulating unit and the second rotation regulating unit surrounds both sides of the first rotation regulating unit and the second rotation regulating unit in the circumferential direction. An optical unit with a runout correction function described in any one of the items. The first rotation restricting portion extends from the first annular plate portion toward the outer peripheral side and is fixed to the holder.
The optical unit with a runout correction function according to claim 9, wherein the second rotation restricting portion is arranged in a notch portion having a central portion in the circumferential direction of the first rotation regulating portion.

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