JP7530243B2 - Optical unit with shake correction function - Google Patents

Description

The present invention relates to an optical unit with a shake correction function that corrects shake by rotating a camera module around a first axis and a second axis that intersect with the optical axis.

Among optical units mounted on mobile terminals and mobile objects, there are those that rotate a movable body equipped with a camera module around the optical axis, around a first axis perpendicular to the optical axis, and around a second axis perpendicular to the optical axis and the first axis in order to suppress distortion of captured images when the mobile terminal or mobile object is moving. Patent Document 1 describes this type of optical unit with shake correction function.

The optical unit with shake correction function of Patent Document 1 includes a movable body including a camera module and a holder frame that holds the camera module from the radial outside, a rotation support mechanism that supports the movable body rotatably around the optical axis, a gimbal mechanism, and a fixed body that supports the movable body via the gimbal mechanism and the rotation support mechanism. The movable body is disposed on the inner periphery side of the fixed body. The rotation support mechanism includes an intermediate frame body disposed between the movable body and the fixed body, and multiple elastic members that span the movable body and the intermediate frame body in the radial direction. The multiple elastic members are disposed at equal angular intervals around the optical axis and allow the movable body to rotate around the optical axis relative to the intermediate frame body. The gimbal mechanism includes a gimbal spring, a first connection mechanism that connects the movable body and the intermediate frame body rotatably around the first axis, and a second connection mechanism that connects the gimbal spring and the fixed body rotatably around the second axis.

The optical unit with shake correction function also includes a shake correction magnetic drive mechanism for rotating the movable body around the first axis and the second axis, and a reeling correction magnetic drive mechanism for rotating the movable body around the optical axis. The shake correction magnetic drive mechanism includes a shake correction magnet fixed to the outer surface of the holder frame, and a shake correction coil supported by the fixed body and facing the shake correction magnet in the radial direction. The shake correction magnet is polarized in two poles in the optical axis direction, and its magnetized polarization line extends in the circumferential direction. The rolling correction magnetic drive mechanism includes a rolling correction magnet fixed to the outer surface of the holder frame, and a rolling correction coil supported by the fixed body and facing the rolling correction magnet in the radial direction. The rolling correction magnet is polarized in two poles in the circumferential direction, and its magnetized polarization line extends in the optical axis direction.

JP 2019-200270 A

In the optical unit with shake correction function of Patent Document 1, if the holder frame to which the shake correction magnet is fixed is made of magnetic metal, the holder frame functions as a yoke for the shake correction magnetic drive mechanism. This makes it easier for the shake correction magnetic drive mechanism to ensure the driving force that drives the movable body.

However, if the holder frame is made of a magnetic metal, part of the magnetic flux of the shake correction magnet that flows from one side of the magnetized polarization line to the other side is short-circuited in the area of the holder frame adjacent to the shake correction magnet in the circumferential direction. Such a short-circuit of the magnetic flux reduces the efficiency of using the magnetic flux of the shake correction magnet as a driving force.

In view of these points, the object of the present invention is to provide an optical unit with a shake correction function that can efficiently utilize the magnetic flux of the magnet of the shake correction magnetic drive mechanism that drives the movable body.

In order to solve the above problems, the optical unit with shake correction function of the present invention has a camera module and a movable body including a holder for holding the camera module, a gimbal mechanism for supporting the movable body rotatably around a first axis intersecting the optical axis of the camera module and rotatably around a second axis intersecting the optical axis and the first axis, a fixed body for supporting the movable body via the gimbal mechanism, and a shake correction magnetic drive mechanism for rotating the movable body around the first axis and the second axis, the holder being made of a magnetic metal and supporting the camera module from the radial outside. The magnetic drive mechanism for image stabilization includes a frame portion surrounding the magnet, a magnet for image stabilization fixed to the outer surface of the frame portion, and a magnet for image stabilization supported by the fixed body and facing the magnet for image stabilization in the radial direction at a predetermined first distance, the magnet for image stabilization is polarized into two poles in the optical axis direction, and a first magnetized polarization line extends in the circumferential direction, the frame portion includes a first opening portion provided along the magnet for image stabilization at a position adjacent to the magnet for image stabilization in the circumferential direction, and the first magnetized polarization line and the first opening portion overlap when viewed from the circumferential direction.

According to the present invention, the movable body has a holder having a frame portion surrounding the camera module from the radial outside. The holder is made of a magnetic metal, and the shake correction magnet of the shake correction magnetic drive mechanism is fixed to the outer surface of the frame portion. The shake correction coil of the shake correction magnetic drive mechanism is fixed to the fixed body and faces the shake correction magnet in the radial direction. This allows the holder to function as a yoke of the shake correction magnetic drive mechanism. Therefore, the shake correction magnetic drive mechanism makes it easy to ensure the driving force for driving the movable body. In addition, the frame portion has a first opening portion that overlaps with the first magnetized polarization line when viewed from the circumferential direction at a position adjacent to the shake correction magnet in the circumferential direction. This makes it possible to prevent or suppress a short circuit of a part of the magnetic flux of the shake correction magnet that is directed from one side of the first magnetized polarization line to the other side in the region of the frame portion adjacent to the shake correction magnet in the circumferential direction. Therefore, the magnetic flux of the shake correction magnet can be efficiently used as a driving force for driving the movable body. In addition, the first opening is provided along the shake correction magnet. Therefore, by inserting a positioning jig into the first opening and adhering the shake correction magnet to the frame while contacting it with the jig, the shake correction magnet can be positioned in the circumferential direction. This improves the accuracy of the positional relationship between the shake correction magnet and the shake correction coil, allowing the magnetic flux of the shake correction magnet to be used more efficiently.

In the present invention, it is desirable that the first width dimension of the first opening in the circumferential direction is equal to or greater than the first separation between the shake correction magnet and the shake correction coil in the radial direction. In this way, it becomes easier to direct the magnetic flux from the shake correction magnet in the circumferential direction toward the shake correction coil. Therefore, it is easier to prevent the magnetic flux of the shake correction magnet from shorting out at the frame portion.

In the present invention, the shake correction magnet has a rectangular parallelepiped shape and includes a pair of first side wall surfaces extending in the optical axis direction on both sides of the circumferential direction, and the frame portion includes, as the first opening, a one-side opening extending linearly in the optical axis direction along one of the first side wall surfaces, and a second-side opening extending linearly in the optical axis direction along the other first side wall surface. In this way, it is possible to prevent or suppress short-circuiting of the magnetic flux of the shake correction magnet on both sides of the circumferential direction of the shake correction magnet in the frame portion.

In the present invention, a first magnet fixing region that overlaps with the shake correction magnet on the outer surface of the frame portion is provided with a plurality of first recesses, and an adhesive layer can be interposed between the first magnet fixing region and the shake correction magnet. In this way, the adhesive that forms the adhesive layer is held in the first recesses, so that the shake correction magnet can be firmly fixed to the frame portion.

In the present invention, each of the multiple first recesses is a groove extending in the optical axis direction, and one end of the groove in the optical axis direction can reach the outside of the first magnet fixing area on the outer surface. In this way, after the shake correction magnet is positioned and attached to the frame, adhesive can be poured into the first recess from one end in the optical axis direction exposed to the outside from the shake correction magnet in the first recess, which is a groove. This allows an adhesive layer to be formed between the first magnet fixing area and the shake correction magnet, and the shake correction magnet can be fixed to the first magnet fixing area.

In the present invention, the present invention includes a rotation support mechanism that supports the movable body rotatably around the optical axis, and a rolling correction magnetic drive mechanism that rotates the movable body around the optical axis. The gimbal mechanism supports the rotation support mechanism rotatably around the first axis and the second axis, thereby supporting the movable body via the rotation support mechanism. The rolling correction magnetic drive mechanism includes a rolling correction magnet that is arranged in the circumferential direction of the shake correction magnet and fixed to the outer surface of the frame, and a rolling correction coil that is held by the fixed body and faces the rolling correction magnet in the radial direction at a predetermined second distance. The rolling correction magnet is polarized into two poles in the circumferential direction, and its second magnetized polarization line extends in the optical axis direction. The frame has a second opening at a position adjacent to the rolling correction magnet in the optical axis direction, and the second magnetized polarization line and the second opening overlap when viewed from the optical axis direction.

In this way, the movable body can rotate around the first axis and the second axis while being rotatable around the optical axis. Therefore, the movable body can be rotated around the optical axis, the first axis, and the second axis to perform shake correction. The holder also functions as a yoke for the rolling correction magnetic drive mechanism that drives the movable body around the optical axis. Therefore, it is easy to ensure the driving force for the rolling correction magnetic drive mechanism to drive the movable body. Furthermore, the frame portion has a second opening that overlaps with the second magnetized polarization line when viewed from the optical axis direction, at a position adjacent to the rolling correction magnet in the optical axis direction. This makes it possible to prevent or suppress a part of the magnetic flux of the rolling correction magnet that is directed from one side of the second magnetized polarization line to the other side in the region of the frame portion adjacent to the rolling correction magnet in the optical axis direction from being short-circuited. Therefore, the magnetic flux of the rolling correction magnet can be efficiently used for the driving force that drives the movable body. In addition, the second opening is provided along the rolling correction magnet. Therefore, by inserting a positioning jig into the second opening and adsorbing the rolling correction magnet to the frame while contacting it with the jig, the rolling correction magnet can be positioned in the optical axis direction. This improves the accuracy of the positional relationship between the rolling correction magnet and the rolling correction coil, allowing the magnetic flux of the rolling correction magnet to be used more efficiently.

In the present invention, it is desirable that the second width dimension of the second opening in the optical axis direction is equal to or greater than the second separation between the rolling correction magnet and the rolling correction coil in the radial direction. In this way, it becomes easier to direct the magnetic flux from the rolling correction magnet in the optical axis direction toward the rolling correction coil. Therefore, it is easier to prevent the magnetic flux of the rolling correction magnet from shorting out at the frame.

According to the present invention, the holder to which the shake correction magnet is fixed in the movable body is made of magnetic metal. This allows the holder to function as a yoke of the shake correction magnetic drive mechanism. Therefore, the shake correction magnetic drive mechanism makes it easy to ensure the driving force for driving the movable body. In addition, the frame portion of the holder has a first opening that overlaps with the first magnetized polarization line of the shake correction magnet when viewed from the circumferential direction at a position adjacent to the shake correction magnet in the circumferential direction. This makes it possible to prevent or suppress short-circuiting of a part of the magnetic flux of the shake correction magnet that runs from one side of the first magnetized polarization line to the other side in the region of the frame portion adjacent to the shake correction magnet in the circumferential direction. Therefore, the magnetic flux of the shake correction magnet can be efficiently used as the driving force for driving the movable body. In addition, the first opening is provided along the shake correction magnet. Therefore, by inserting a positioning jig into the first opening and adsorbing the shake correction magnet to the frame portion while contacting the jig, the shake correction magnet can be positioned in the circumferential direction. This improves the accuracy of the positional relationship between the shake correction magnet and the shake correction coil, allowing the magnetic flux of the shake correction magnet to be used more efficiently.

1 is a perspective view of an optical unit with correction function to which the present invention is applied. 2 is an exploded perspective view of the optical unit with shake correction function of FIG. 1 as viewed from one side in the optical axis direction. 2 is an exploded perspective view of the optical unit with shake correction function of FIG. 1 as viewed from the other side in the optical axis direction. 2 is a cross-sectional view of the optical unit with shake correction function cut along the XZ plane. FIG. 2 is a cross-sectional view of the optical unit with shake correction function cut along the XY plane. FIG. 2 is a cross-sectional view of the optical unit with shake correction function taken along a plane including a first axis and a Z axis. FIG. 4 is a cross-sectional view of the optical unit with shake correction function cut along a plane including the second axis and the Z axis. FIG. FIG. FIG. 1 is a plan view showing a main part of an optical unit with a shake correction function. FIG. 2 is a perspective view of a holder, a first magnet, and a second magnet. FIG. 2 is a perspective view of a stopper case and a magnetic member.

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

(Overall composition)
FIG. 1 is a perspective view of an optical unit 1 with a shake correction function to which the present invention is applied. FIG. 2 is an exploded perspective view of the optical unit 1 with a shake correction function of FIG. 1 as viewed from one side in the optical axis direction. FIG. 3 is an exploded perspective view of the optical unit 1 with a shake correction function of FIG. 1 as viewed from the other side in the optical axis direction. FIG. 4 is a cross-sectional view of the optical unit 1 with a shake correction function cut in the XZ plane. FIG. 5 is a cross-sectional view of the optical unit 1 with a shake correction function cut in the XY plane. FIG. 6 is a cross-sectional view of the optical unit 1 with a shake correction function cut in a plane including the first axis R1 and the Z axis. FIG. 7 is a cross-sectional view of the optical unit 1 with a shake correction function cut in a plane including the second axis R2 and the Z axis. FIG. 8 is a perspective view of a gimbal spring 70. FIG. 9 is a plan view showing a main part of the optical unit 1 with a shake correction function.

The optical unit 1 with shake correction function has a camera module 4 equipped with a lens 2 and an image sensor 3. The optical unit 1 with shake correction function is used in optical devices such as camera-equipped mobile phones and drive recorders, and in optical devices such as action cameras and wearable cameras mounted on moving objects such as helmets, bicycles, and radio-controlled helicopters. In such optical devices, if the optical device shakes during shooting, the captured image is distorted. In order to prevent the captured image from being tilted, the optical unit 1 with shake correction function corrects the tilt of the camera module 4 based on the acceleration, angular velocity, amount of shake, etc. detected by a detection means such as a gyroscope.

The optical unit 1 with shake correction function performs shake correction by rotating the camera module 4 around the optical axis L, around a first axis R1 perpendicular to the optical axis L, and around a second axis R2 perpendicular to the optical axis L and the first axis R1. The optical axis L is the optical axis of the lens 2 of the camera module 4. The intersection of the optical axis L, the first axis R1, and the second axis is located inside the camera module 4.

In the following description, the three mutually orthogonal axes are the X-axis, Y-axis, and Z-axis. The Z-axis coincides with the optical axis L of the lens 2. The X-axis is orthogonal to the optical axis L and passes through the intersection of the first axis R1 and the second axis R2. The X-axis also intersects with the first axis R1 and the second axis R2 at an angle of 45°. The Y-axis is orthogonal to the optical axis L and the X-axis and passes through the intersection of the first axis R1 and the second axis R2. The Y-axis also intersects with the first axis R1 and the second axis R2 at an angle of 45°. Therefore, when the plane including the X-axis and the Y-axis is the XY plane, the first axis R1 and the second axis R2 are located on the XY plane. The first axis R1 and the second axis R2 are inclined 45° around the Z-axis with respect to the X-axis and the Y-axis.

In the following description, the directions along the X-axis, Y-axis, and Z-axis are referred to as the X-axis, Y-axis, and Z-axis directions. One side in the X-axis direction is referred to as the -X direction, and the other side as the +X direction. One side in the Y-axis direction is referred to as the -Y direction, and the other side as the +Y direction, and one side in the Z-axis direction is referred to as the -Z direction, and the other side as the +Z direction. The -Z direction is the side of the camera module 4 opposite the subject, and the +Z direction is the subject side of the camera module 4. The direction along the first axis R1 is referred to as the first axis R1 direction, and the direction along the second axis R2 is referred to as the second axis R2 direction. Furthermore, the direction around the Z-axis, i.e., the direction around the optical axis L, is referred to as the circumferential direction. The radial direction is the direction centered around the Z-axis.

As shown in Figures 1 and 2, the optical unit 1 with shake correction function includes a movable body 5 having a camera module 4, and a rotation support mechanism 6 that supports the movable body 5 so that it can rotate around the optical axis L. Therefore, the movable body 5 can rotate in a roll direction ROLL around the optical axis L.

The optical unit 1 with shake correction function also has a gimbal mechanism 7 that supports the rotation support mechanism 6 rotatably around the first axis R1 and rotatably around the second axis R2, and a fixed body 8 that supports the movable body 5 via the gimbal mechanism 7 and the rotation support mechanism 6. Therefore, the movable body 5 is supported rotatably around the first axis R1 and rotatably around the second axis R2 via the gimbal mechanism 7.

Here, the movable body 5 can rotate in the yaw direction YAW about the X axis and in the pitch direction PITCH about the Y axis by combining the rotation about the first axis R1 and the rotation about the second axis R2. Therefore, the gimbal mechanism 7 is a rotational support mechanism that supports the movable body 5 rotatably about the X axis and the Y axis via the rotational support mechanism 6. The intersection of the optical axis L, the X axis, and the Y axis is the same as the intersection of the optical axis L, the first axis R1, and the second axis R2, and is located inside the movable body 5.

Furthermore, the optical unit 1 with shake correction function includes a flexible printed circuit board 14 connected to the movable body 5. As shown in Figs. 4 and 5, the flexible printed circuit board 14 is pulled out from the movable body 5 in the +X direction. The flexible printed circuit board 14 is pulled out to the outside of the fixed body 8 and connected, via a connector (not shown), to a board of an optical device on which the optical unit 1 with shake correction function is mounted.

As shown in FIG. 5, the optical unit 1 with shake correction function has a shake correction magnetic drive mechanism 10 that rotates the movable body 5 around the first axis R1 and the second axis R2. The shake correction magnetic drive mechanism 10 includes a first shake correction magnetic drive mechanism 11 that generates a drive force around the X axis for the movable body 5, and a second shake correction magnetic drive mechanism 12 that generates a drive force around the Y axis for the movable body 5. As shown in FIGS. 2, 3, and 5, the first shake correction magnetic drive mechanism 11 includes a first magnet 111 and a first coil 112 that are arranged in the -Y direction of the movable body 5. The second shake correction magnetic drive mechanism 12 includes a second magnet 121 and a second coil 122 that are arranged in the -X direction of the movable body 5.

The optical unit 1 with shake correction function further includes a magnetic driving mechanism 13 for rolling correction that rotates the movable body 5 around the optical axis L, as shown in Figs. 2, 3, and 5. The magnetic driving mechanism 13 for rolling correction includes a magnet 131 for rolling correction and a coil 132 for rolling correction that are arranged in the +Y direction of the movable body 5. The optical unit 1 with shake correction function includes a flexible printed circuit board 15 for supplying power to the magnetic driving mechanism 10 for shake correction and the magnetic driving mechanism 13 for rolling correction. The flexible printed circuit board 15 is attached to the fixed body 8.

(Movable body)
Fig. 10 is a perspective view of the holder, the first magnet, and the second magnet. As shown in Figs. 2 to 5, the movable body 5 includes a camera module 4 and a holder 16 that holds the camera module 4. The camera module 4 includes an octagonal camera module body 4a when viewed from the Z-axis direction, and a cylindrical lens barrel portion 4b that protrudes in the +Z direction from the camera module body 4a. The lens 2 (see Fig. 4) is held in the lens barrel portion 4b. The optical axis L of the camera module 4 is the optical axis of the lens 2.

The holder 16 is made of a magnetic metal. The holder 16 has a holder bottom 161 that supports the camera module 4 from the -Z direction, and a holder frame 162 (frame) that rises in the +Z direction from the outer periphery of the holder bottom 161. As shown in Figures 2 and 10, the holder frame 162 has a notch 160 that opens in the +X direction.

The camera module body 4a is accommodated in a camera module accommodating recess 163 defined by a holder bottom 161 and a holder frame 162. The camera module accommodating recess 163 has a holder opening 163a facing the +Z direction, and the camera module body 4a is fitted into the camera module accommodating recess 163 from the +Z direction. The flexible printed circuit board 14 is connected to the image sensor 3 disposed inside the camera module 4, and is pulled out in the +X direction of the movable body 5 through the cutout 160.

The holder bottom 161 is plate-shaped. The -Z end face of the holder bottom 161, i.e., the -Z end face 16a of the holder 16, is perpendicular to the optical axis L when the camera module 4 is held in the holder 16. A shaft portion 61 that protrudes in the -Z direction is provided in the center of the holder bottom 161. The shaft portion 61 is formed in the holder 16 by burring. The shaft portion 61 is coaxial with the optical axis L when the camera module 4 is held in the holder 16.

As shown in FIG. 10, a first magnet 111 (shake correction magnet) is fixed to the outer surface of the holder frame 162 in the -Y direction. A second magnet 121 (shake correction magnet) is fixed to the outer surface of the holder frame 162 in the -X direction. In addition, a rolling correction magnet 131 is fixed to the outer surface of the holder frame 162 in the +Y direction.

The first magnet 111 has a rectangular parallelepiped shape and includes a pair of first side wall surfaces 111a extending in the Z-axis direction on both sides in the circumferential direction, and a pair of second side wall surfaces 111b extending in the circumferential direction on both sides in the Z-axis direction. Of the pair of second side wall surfaces 111b, the second side wall surface 111b located in the -Z direction is at the same height as the end surface 16a of the holder 16 in the -Z direction in the Z-axis direction. In addition, the first magnet 111 is polarized into two poles in the Z-axis direction. Therefore, the magnetized polarization line 111c (first magnetized polarization line) of the first magnet 111 extends in the circumferential direction.

The second magnet 121 is the same member as the first magnet 111. The second magnet 121 has a rectangular parallelepiped shape and includes a pair of first side wall surfaces 121a extending in the Z-axis direction on both sides in the circumferential direction, and a pair of second side wall surfaces 121b extending in the circumferential direction on both sides in the Z-axis direction. Of the pair of second side wall surfaces 121b, the second side wall surface 121b located in the -Z direction is at the same height in the Z-axis direction as the end surface 16a of the holder 16 in the -Z direction. In addition, the second magnet 121 is polarized into two poles in the Z-axis direction. Therefore, the magnetized polarization line 121c (first magnetized polarization line) of the second magnet 121 extends in the circumferential direction.

Here, on the outer surface of the holder frame 162 in the -Y direction, a magnet fixing area 162a (first magnet fixing area) that overlaps with the first magnet 111 is provided with a plurality of recesses 164. In addition, an adhesive layer 165 is interposed between the magnet fixing area 162a and the first magnet 111. In this example, each of the plurality of recesses 164 is a groove that extends linearly in the Z-axis direction. The width of each groove is approximately 0.03 mm. The +Z end of the recess 164 in the Z-axis direction reaches the outside of the magnet fixing area 162a on the outer surface of the holder frame 162 in the -Y direction. Therefore, when the first magnet 111 is placed in the magnet fixing area 162a, the +Z end of the recess 164 is located in the +Z direction from the first magnet 111.

The frame portion of the holder frame 162 in the -Y direction also has openings 166 (first openings) extending along the first side wall surfaces 111a on both sides in the circumferential direction of the first magnet 111. More specifically, the holder frame 162 has openings 166, which are a one-side opening 166a that extends along one of the first side wall surfaces 111a at a position adjacent to one of the first side wall surfaces 111a in the circumferential direction of the first magnet 111, and a other-side opening 166b that extends along the other first side wall surface 111a at a position adjacent to the other first side wall surface 111a. The one-side opening 166a and the other-side opening 166b extend linearly in the Z-axis direction with a constant width dimension D1. When viewed from the circumferential direction, the magnetized polarization line 111c of the first magnet 111 and each opening 166a, 166b overlap.

Similarly, on the outer surface of the holder frame 162 in the -X direction, a magnet fixing area 162b (first magnet fixing area) that overlaps with the second magnet 121 has multiple recesses 164. An adhesive layer 165 is interposed between the magnet fixing area and the second magnet 121. Each of the multiple recesses 164 is a groove that extends linearly in the Z axis direction. The +Z end of the recess 164 in the Z axis direction reaches the outside of the magnet fixing area 162b on the outer surface of the holder frame 162 in the -Y direction. Therefore, when the second magnet 121 is placed in the magnet fixing area 162b, the +Z end of the recess 164 is located in the +Z direction further than the second magnet 121.

Further, the frame portion of the holder frame 162 in the -X direction has openings 167 (first openings) extending along the first side wall surfaces 121a on both sides in the circumferential direction of the second magnet 121. More specifically, the holder frame 162 has, as the openings 167, a one-side opening 167a extending along one of the first side wall surfaces 121a at a position adjacent to one of the first side wall surfaces 121a in the circumferential direction of the second magnet 121, and a other-side opening 167b extending along the other of the first side wall surfaces 121a at a position adjacent to the other first side wall surface 121a. The one-side opening 167a and the other-side opening 167b each extend linearly in the Z-axis direction with a constant width dimension D1.
When viewed from the circumferential direction, the magnetized polarization lines 121c of the second magnet 121 overlap with the openings 167a, 167b.

Next, the rolling correction magnet 131 has a rectangular parallelepiped shape and includes a pair of first side wall surfaces 131a extending in the circumferential direction on both sides in the Z-axis direction, and a pair of second side surface surfaces 131b extending in the Z-axis direction on both sides in the circumferential direction. Of the pair of first side wall surfaces 131a, the first side surface located in the -Z direction is located in the -Z direction further in the -Z direction than the end surface 16a of the holder 16 in the -Z direction. The rolling correction magnet 131 is polarized and magnetized into two poles in the circumferential direction. Therefore, the magnetized polarization line 131c (second magnetized polarization line) of the rolling correction magnet 131 extends in the Z-axis direction.

On the outer surface of the holder frame 162 in the +Y direction, a magnet fixing area 162c (second magnet fixing area) that overlaps with the rolling correction magnet 131 has a plurality of recesses 164. An adhesive layer 165 is interposed between the magnet fixing area 162c and the rolling correction magnet 131. Each of the recesses 164 is a groove that extends linearly in the Z-axis direction.

The +Y-direction frame portion of the holder frame 162 also has an opening 168 (second opening) that extends along the first side wall surface 131a in the +Z direction at a position adjacent to the rolling correction magnet 131 in the +Z direction. The opening 168 extends linearly in the circumferential direction with a constant width dimension D2. When viewed from the Z-axis direction, the magnetized polarization line 111c of the rolling correction magnet 131 and the opening 168 overlap. The +Z-direction end of the recess 164 reaches the opening 168. Therefore, the recess 164 and the opening 168 are in communication.

Here, when fixing the first magnet 111 to the holder 16, a positioning jig is inserted into the opening 116, and the first magnet 111 is attached to the holder frame 162 while being in contact with the jig. In addition, the second side wall surface 111b in the -Z direction of the first magnet 111 and the end surface 16a in the -Z direction of the holder 16 are arranged on the same plane using a jig or the like. As a result, the first magnet 111 is attached to the holder 16 while being positioned in the circumferential direction and in the Z-axis direction. Next, adhesive is applied to the outer surface of the holder frame 162 and the boundary portion in the +Z direction of the first magnet 111. As a result, the adhesive enters the recess 164 from the +Z end of the recess 164 located in the +Z direction from the first magnet 111, and reaches the magnet fixing area 162a. Therefore, an adhesive layer 165 is formed between the holder frame 162 and the first magnet 111. The first magnet 111 is fixed to the outer surface of the holder frame 162 by an adhesive layer 165.

When fixing the rolling correction magnet 131 to the holder 16, a positioning jig is inserted into the opening 168, and the rolling correction magnet 131 is attracted to the holder frame 162 while being in contact with the jig. As a result, the rolling correction magnet 131 is held in the holder 16 while being positioned in the Z-axis direction. Next, adhesive is applied to the opening edge of the opening 168 formed in the +Z direction of the rolling correction magnet 131. As a result, the adhesive enters the recess 164 from the +Z end of the recess 164 that communicates with the opening 168, and reaches the magnet fixing area 162c. Therefore, an adhesive layer 165 is formed between the holder frame 162 and the rolling correction magnet 131. The rolling correction magnet 131 is fixed to the outer surface of the holder frame 162 by the adhesive layer 165.

(Fixed body)
Fig. 11 is a perspective view of the frame case, the stopper case, the first magnetic member, and the second magnetic member. As shown in Figs. 1 to 5, the fixed body 8 includes a cover bottom 20 that covers the movable body 5 and the flexible printed circuit board 14 from the -Z direction, a frame case 30 that is fixed to the cover bottom 20 from the +Z direction and surrounds the diagonal direction of the movable body 5, and a stopper case 40 that surrounds the outer periphery of the frame case 30 and the movable body 5. The cover bottom 20, the frame case 30, and the stopper case 40 are made of non-magnetic metal.

The cover bottom 20 is, for example, a sheet metal member with a thickness of 0.15 mm, and is manufactured by press working. The frame case 30 is, for example, a sheet metal member with a thickness of 0.30 mm, and is manufactured by press working. The frame case 30 is thicker than the cover bottom 20. The stopper case 40 has the same thickness as the cover bottom 20, and is manufactured by press drawing. The stopper case 40 surrounds the movable body 5 from three directions: the -X direction, the -Y direction, and the +Y direction.

As shown in Figs. 2, 3, and 5, the fixed body 8 includes an FPC cover 50 that surrounds the outer periphery of the flexible printed circuit board 14 that is pulled out from the movable body 5 in the +X direction. The FPC cover 50 is made of resin and is fixed to the cover bottom 20 from the +Z direction. The -X end of the FPC cover 50 includes a hook portion 52 that fits into the rectangular frame portion 31 of the frame case 30 (see Figs. 3 and 5). The hook portion 52 fits into the rectangular frame portion 31 from the +Z direction, so that the -X end of the FPC cover 50 is locked to the frame case 30. In addition, locking portions 53 are formed on the -Y side and +Y side of the -X end of the FPC cover 50. The +X end of the stopper case 40 includes an engagement hole 49 that engages with the locking portion 53. In addition, the -X side of the stopper case 40 has engagement holes 27 that engage with two third elastic engagement parts 26 that rise from the -X edge of the cover bottom 20 in the +Z direction (see Figure 3).

As shown in FIG. 5, the flexible printed circuit board 15 is routed in the circumferential direction along the inner surface of the stopper case 40. As shown in FIGS. 2, 3, and 5, the flexible printed circuit board 15 includes a first coil fixing portion 151 extending in the X-axis direction along the -Y-direction side surface of the stopper case 40, a second coil fixing portion 152 extending in the Y-axis direction along the -X-direction side surface of the stopper case 40, and a third coil fixing portion 153 extending in the X-axis direction along the +Y-direction side surface of the stopper case 40. The first coil fixing portion 151, the second coil fixing portion 152, and the third coil fixing portion 153 are held on the inner circumferential side of the stopper case 40.

The first coil 112 of the first shake correction magnetic drive mechanism 11 is fixed to the first coil fixing part 151, and the second coil 122 of the second shake correction magnetic drive mechanism 12 is fixed to the second coil fixing part 152. The rolling correction coil 132 is fixed to the third coil fixing part 153. The first coil 112, the second coil 122, and the rolling correction coil 132 are electrically connected to the flexible printed circuit board 15. The first coil 112, the second coil 122, and the rolling correction coil 132 are fixed to the stopper case 40 via the flexible printed circuit board 15.

2, 3, 5, and 11, the stopper case 40 includes a body 40A that surrounds the movable body 5 from three directions, and an end plate 44 that protrudes inward from the +Z-direction edge of the body 40A. The body 40A includes a first case wall 41 that extends in the X-axis direction in the -Y direction of the movable body 5, a second case wall 42 that extends in the Y-axis direction in the -X direction of the movable body 5, and a third case wall 43 that extends in the X-axis direction in the +Y direction of the movable body 5. The end plate 44 includes a first case protrusion 45A that protrudes inward from a diagonal position in the first axis R1 direction, and a second case protrusion 45B that protrudes inward from a diagonal position in the second axis R2 direction. The first case projection 45A has an extension 45a that extends from the end plate 44 to the inner periphery, and a bent portion 45b that bends and extends from the inner periphery edge of the extension in the -Z direction. The end plate 44 also has case positioning holes 440 for positioning with the frame case 30 at two locations on the first axis R1 and two locations on the second axis R2.

The stopper case 40 has hooks 46 (see Figures 2, 3, and 4) that engage the edge of the flexible printed circuit board 15 in the -Z direction, and grooves 47 (see Figure 3) that engage the edge of the flexible printed circuit board 15 in the +Z direction. The hooks 46 are formed in one location at the circumferential center of each of the first case wall 41, the second case wall 42, and the third case wall 43. The grooves 47 are formed in two locations each at the edge of the end plate portion 44 in the -Y direction, the edge in the -X direction, and the edge in the +Y direction. The first coil fixing portion 151, the second coil fixing portion 152, and the third coil fixing portion 153 are positioned by engaging the edges in the -Z direction with the hooks 46 and the edges in the +Z direction with the grooves 47, and are fixed to the stopper case 40 with an adhesive.

As shown in Figures 3 and 11, the first case wall 41, the second case wall 42, and the third case wall 43 each have a magnetic member placement recess 48 at the circumferential center of their outer surfaces. The magnetic member placement recess 48 extends linearly in the optical axis direction with a constant width.

5 and 11, the first magnetic member 113 is disposed in the magnetic member placement recess 48 provided in the first case wall 41. As shown in FIG. 11, the first magnetic member 113 is a rectangular plate-like member, and has two parallel sides that extend linearly in the Z-axis direction. The length M of the first magnetic member 113 in the Z-axis direction is shorter than the length N of the magnetic member placement recess 48 in the Z-axis direction. The length M of the first magnetic member 113 in the Z-axis direction is longer than the length 0 of the first magnet in the Z-axis direction shown in FIG. 10. The thickness of the first magnetic member 113 is equal to or less than the depth of the magnetic member placement recess 48. Therefore, when the first magnetic member 113 is disposed in the magnetic member placement recess 48, the first magnetic member 113 does not protrude from the magnetic member placement recess 48 to the outer periphery.

A weld mark 54 is provided in the magnetic member placement recess 48 for fixing the first magnetic member 113 to the first case wall 41. That is, the first magnetic member 113 is fixed to the first case wall 41 by welding. The first magnetic member 113, together with the first magnet 111 held by the movable body 5, constitutes a magnetic spring for positioning the movable body 5 at the origin position for shake correction around the X-axis.

The second magnetic member 123 is disposed in the magnetic member placement recess 48 provided in the second case wall 42. The second magnetic member 123 is the same member as the first magnetic member 113. The second magnetic member is a rectangular plate-like member, and has two parallel sides that extend linearly in the Z-axis direction. The length dimension M of the second magnetic member in the Z-axis direction is shorter than the length dimension N of the magnetic member placement recess 48. The length dimension M of the second magnetic member in the Z-axis direction is longer than the length O of the second magnet in the Z-axis direction. The thickness of the second magnetic member 123 is equal to or less than the depth of the magnetic member placement recess 48. Therefore, when the second magnetic member 123 is disposed in the magnetic member placement recess 48, the second magnetic member 123 does not protrude from the magnetic member placement recess 48 to the outer periphery.

A weld mark 54 is provided in the magnetic member placement recess 48 for fixing the second magnetic member 123 to the second case wall 42. That is, the second magnetic member 123 is fixed to the second case wall 42 by welding. The second magnetic member 123, together with the second magnet 121 held by the movable body 5, constitutes a magnetic spring for positioning the movable body 5 at the origin position for shake correction around the Y axis.

As shown in FIG. 3, the hook 46 is a cut-and-raised portion formed by cutting and raising the bottom of the magnetic member placement recess 48 toward the inner circumference. Therefore, the bottom of the magnetic member placement recess 48 is an opening 46a where the hook 46 is cut and raised. The opening 46a is used as an adhesive application hole for pouring adhesive for fixing between the flexible printed circuit board 15 and the stopper case 40 after the flexible printed circuit board 15 is positioned in the stopper case 40.

2 and 3, the frame case 30 includes a rectangular frame portion 31 that abuts against the cover bottom 20 from the +Z direction, a pair of first vertical frame portions 32 that rise in the +Z direction from diagonal positions in the first axis R1 direction of the rectangular frame portion 31, and a pair of second vertical frame portions 33 that rise in the +Z direction from diagonal positions in the second axis R2 direction of the rectangular frame portion 31. The first vertical frame portion 32 and the second vertical frame portion 33 include second locking portions 24 that lock the second elastic engagement portions 23 at four locations provided at diagonal positions in the first axis R1 direction and diagonal positions in the second axis R2 direction of the cover bottom 20. The frame case 30 is fixed to the cover bottom 20 by locking the second elastic engagement portions 23 to the second locking portions 24.

2 and 3, each of the pair of first vertical frame parts 32 includes a plate part 34 extending in the +Z direction and two protrusions 35 protruding from both widthwise edges of the plate part 34. Each of the pair of second vertical frame parts 33 includes a plate part 36 extending in the +Z direction, a pair of protrusions 37 protruding from approximately the center in the Z-axis direction of both widthwise edges of the plate part 36, and four protrusions 38 protruding from both widthwise edges of the plate part 36 in the +Z and -Z directions of each protrusion 37. The protrusions 35, 38 extend in the Y-axis or X-axis direction along the flexible printed circuit board 15 fixed to the inner surface of the stopper case 40.

As shown in Figures 1 and 6, the +Z direction end of the plate portion 34 of each of the pair of first vertical frame portions 32 is inserted into the case positioning hole 440 of the stopper case 40. Also, as shown in Figures 1 and 7, the +Z direction end of the plate portion 36 of each of the pair of second vertical frame portions 33 is inserted into the case positioning hole 440 of the stopper case 40. In this embodiment, the ends of the plate portions 34, 36 are fixed to the stopper case 40 by welding.

7, each second vertical frame portion 33 is provided with a second axis side protrusion 56 that protrudes on the second axis R2 toward the movable body 5. Specifically, each second vertical frame portion 33 has a through hole 36a that penetrates the plate portion 36 in the second axis R2 direction, and a second axis side cylinder portion 39 that protrudes from the opening edge of the through hole 36a in the plate portion 36 to the inner periphery in the second axis R2 direction. A cylindrical second axis side shaft 720 is held in the through hole 36a and the second axis side cylinder portion 39. The inner end portion of the second axis side shaft 720 is the second axis side protrusion 56 that protrudes from the plate portion 36 to the movable body 5 side. The tip portion of the second axis side protrusion 56 has a hemispherical surface. The second axis side protrusion 56 constitutes the second connection mechanism 72 of the gimbal mechanism 7, as described later. Here, a pair of protrusions 37 are provided on both circumferential sides of the second shaft side cylinder portion 39.

(Rotational support mechanism)
4, 6 and 7, the rotation support mechanism 6 includes a shaft portion 61 protruding from the movable body 5 in the -Z direction, a plate holder 63 supported by the gimbal mechanism 7 and rotating about a first axis R1 and a second axis R2, and a bearing mechanism 62 that rotatably supports the shaft portion 61 on the plate holder 63. In addition, as shown in Fig. 3, the rotation support mechanism 6 includes an attraction magnet 64 fixed to the plate holder 63 and attracts the holder to the side of the plate holder 63. The shaft portion 61 of the movable body 5 is coaxial with the optical axis L.

The plate holder 63 is made of a non-magnetic metal. As shown in FIG. 6, the plate holder 63 includes a plate holder tube 65 surrounding the shaft 61, a plate holder annular portion 66 extending from the end of the plate holder tube 65 in the +Z direction toward the outer periphery, and a pair of plate holder extension portions 67 protruding from the plate holder annular portion 66 on both sides in the first axis R1 direction and bending in the +Z direction. The bearing mechanism 62 is a bearing. The bearing mechanism 62 includes an inner ring 621 fixed to a step portion 610 provided on the outer periphery of the shaft 61, an outer ring 622 surrounding the outer periphery of the inner ring 621, a sphere 623 rolling between the inner ring 621 and the outer ring 622, and an annular retainer 624 holding the sphere 623 in a rollable manner. The attraction magnet 64 is annular and fixed to the surface of the plate holder annular portion 66 opposite to the holder 16. The attraction magnet 64 is thinner in the Z-axis direction than the bearing mechanism 62. The attraction magnet 64 is polarized and magnetized into a plurality of poles in the circumferential direction.

When the shaft portion 61 and the plate holder 63 are connected via the bearing mechanism 62, the plate holder annular portion 66 faces the end face 16a of the holder 16 in the -Z direction with a certain gap between them. The attraction magnet 64 is located radially outside the bearing mechanism 62, and is located inside the bearing mechanism 62 when viewed from a direction perpendicular to the Z axis.

As shown in FIG. 6, the tip portions of the pair of plate holder extension portions 67 each extend in the Z-axis direction on the outer periphery side of the movable body 5. The tip portion of each plate holder extension portion 67 has a first axis side recess 68 that is recessed toward the inner periphery side on the first axis R1. The first axis side recess 68 has a concave curved surface. The first axis side recess 68 constitutes a first connection mechanism 71 of the gimbal mechanism 7, as described below.

(Elastic Support Member)
As shown in FIG. 2, the cover bottom 20 has a circular hole 25 centered on the optical axis L. Cylindrical elastic support members 9 are arranged at two locations facing each other in the first axis R1 direction across the circular hole 25. The elastic support member 9 is made of low-hardness rubber with a rubber hardness of 10 or less. The elastic support member 9 is made of, for example, silicon-based rubber with a rubber hardness of 1 to 3. Here, the elastic support member 9 receives the load of the movable body 5 and the rotation support mechanism 6 through the plate holder 63 of the rotation support mechanism 6 arranged at the bottom of the movable body 5 (see FIG. 6). The elastic support member 9 is configured so that the height in the Z-axis direction between the plate holder 63 and the cover bottom 20 has a compression ratio of about 10% when the load of the movable body 5 and the rotation support mechanism 6 is applied. The elastic support member 9 is fixed to the cover bottom 20 but is not fixed to the plate holder 63.

The elastic support members 9 are arranged symmetrically across the optical axis L and fixed to the cover bottom 20. In this embodiment, the center of gravity of the movable body 5 is located on the optical axis, so the elastic support members 9 are arranged symmetrically with respect to the center of gravity of the movable body 5. Therefore, by having the elastic support members 9 bear the load of the movable body 5 and the rotation support mechanism 6, it is possible to improve the positional accuracy when positioning the movable body 5 at the origin position for shake correction. In addition, because the low-hardness rubber is a vibration-proof material, it is possible to improve impact resistance when an impact is applied due to a drop, etc.

(Gimbal mechanism)
2 to 5, the gimbal mechanism 7 includes a gimbal spring 70, a first connection mechanism 71, and a second connection mechanism 72. The first connection mechanism 71 connects the gimbal spring 70 and the plate holder 63 to be rotatable around a first axis R1. The second connection mechanism 72 connects the gimbal spring 70 and the fixed body 8 to be rotatable around a second axis R2. In this example, the second connection mechanism 72 connects the gimbal spring 70 and the frame case 30. When the gimbal mechanism 7 is configured, the movable body 5 is supported by the fixed body 8 via the gimbal mechanism 7 and the rotation support mechanism 6. This allows the movable body 5 to rotate around the intersection point where the optical axis L, the first axis R1, and the second axis R2 intersect.

The gimbal spring 70 is a metal leaf spring. The gimbal spring 70 is frame-shaped and surrounds the movable body 5 from the outer periphery. As shown in FIG. 8, the gimbal spring 70 has a pair of first connection parts 74 located on both sides of the movable body 5 in the direction of the first axis R1, a pair of second connection parts 75 located on both sides of the movable body 5 in the direction of the second axis R2, and four arms 73 that connect the first connection parts 74 and second connection parts 75 adjacent to each other in the circumferential direction on the outer periphery of the movable body 5.

Each first connection portion 74 is plate-shaped, and its thickness direction is oriented in the first axis R1 direction. Each second connection portion 75 is plate-shaped, and its thickness direction is oriented in the second axis R2 direction. Each arm portion 73 connects a first end portion 74a on the second connection portion 75 side at the +Z direction edge of the first connection portion 74 and a second end portion 75a on the first connection portion 74 side at the +Z direction edge of the second connection portion 75. Here, the two arms 73 extending from each first connection portion 74 on both sides in the circumferential direction are spaced apart in the circumferential direction. Therefore, each first connection portion 74 has a first central portion 74b to which the arm portion 73 is not connected, at the circumferential center of the edge in the +Z direction. Similarly, the two arms 73 extending from each second connection portion 75 on both sides in the circumferential direction are spaced apart in the circumferential direction. Therefore, each second connection portion 75 has a second central portion 75b at the circumferential center of the +Z direction edge to which the arm portion 73 is not connected.

Each arm 73 includes a first inclined portion 731 that inclines circumferentially from the first end portion 74a of the first connection portion 74 toward the second connection portion 75 in the +Z direction, a second inclined portion 732 that inclines circumferentially from the second end portion 75a of the second connection portion 75 toward the first connection portion 74 in the +Z direction, and a connection portion 733 that connects the +Z end portion of the first inclined portion 731 to the +Z end portion of the second inclined portion 732.

Of the four arms 73, the connection portions 733 of the three arms 73 located in the -X, -Y, and +Y directions of the movable body 5 each extend in the circumferential direction between the +Z end portion of the first inclined portion 731 and the +Z end portion of the second inclined portion 732. A bent portion 734 recessed in the -Z direction is provided in the circumferential center portion of the connection portions 733 of the three arms 73.

Of the four arms 73, the connection portion 733 of the arm 73 located in the +X direction of the movable body 5 has a shape that avoids interference with the flexible printed circuit board 14 extending in the +X direction from the movable body 5. Specifically, the connection portion 733 includes a pair of protrusions 761 that extend from the +Z direction end portion of the first inclined portion 731 and the +Z direction end portion of the second inclined portion 732, bending in the +X direction, a pair of bent portions 762 that bend in the -Z direction from the +X direction tip of each protrusion 761 and extend in the Z axis direction, and a straight portion 763 that extends linearly in the Y axis direction and connects the -Z direction tips of the pair of bent portions 762. If there is no interference with the flexible printed circuit board 14, the connection portion 733 of the arm 73 located in the +X direction of the movable body 5 can extend in the circumferential direction like the connection portions 733 of the other arms 73.

6, each first connection portion 74 is provided with a first axis side protrusion 80 that protrudes on the first axis R1 toward the movable body 5. Specifically, the first connection portion 74 has a through hole 74c that penetrates the first axis R1 and a first axis side cylinder portion 77 that protrudes from the opening edge of the through hole 74c in the first connection portion 74 to the outer periphery side. A cylindrical first axis side shaft 710 is held in the through hole 74c and the first axis side cylinder portion 77. The inner end portion of the first axis side shaft 710 is the first axis side protrusion 80 that protrudes radially inward from the first axis side cylinder portion 77. The first axis side protrusion 80 has a semispherical surface at the tip portion on the inner periphery side. Also, as shown in FIG. 8, a pair of first connection portions 74 is provided with a pair of protrusions 78 that protrude to the inner periphery side on both sides in the circumferential direction of the first axis side cylinder portion 77.

The first connection mechanism 71 is configured by a semispherical surface provided at the tip of the first shaft side protrusion 80 making point contact with the concave curved surface of the first shaft side recess 68 provided at the tip of the plate holder extension 67. When the first connection mechanism 71 is configured, the plate holder 63 is supported by the gimbal spring 70 in a state in which it can rotate around the first axis R1. When the first shaft side protrusion 80 is supported by the first shaft side recess 68, the pair of plate holder extensions 67 are deflected toward the inner circumference and elastically contact the first shaft side protrusion 80 from the inner circumference side.

When the first connection mechanism 71 is configured, the rotation support mechanism 6 is supported by the gimbal mechanism 7 so as to be rotatable about the first axis R1. When the first connection mechanism 71 is configured, the plate holder extension portion 67 is disposed between the pair of protrusions 78 as shown in FIG. 5 .
is a slip-out prevention portion that prevents the plate holder extension portion 67 from slipping out of the first connection portion 74 in the Z-axis direction.

As shown in Figs. 5 and 7, the pair of second connection parts 75 each have a second axis side recess 79 recessed inward on the second axis R2. The second axis side recess 79 has a concave curved surface. The second connection mechanism 72 is formed by point contact of the semispherical surface of the second axis side protrusion 56 provided on each second vertical frame part 33 of the frame case 30 with the concave curved surface of the second axis side recess 79. When the second connection mechanism 72 is formed, the gimbal spring 70 is supported by the fixed body 8 in a state in which it can rotate around the second axis R2. When the second axis side recess 79 is supported by the second axis side protrusion 56, the pair of second connection parts 75 are bent inward and elastically contact the second axis side protrusion 56 from the inner circumferential side.

When the second connection mechanism 72 is configured, the gimbal mechanism 7 is supported by the fixed body 8 so as to be rotatable around the second axis R2. Furthermore, when the second connection mechanism 72 is configured, as shown in FIG. 5, the tip ends of the pair of second connection parts 75 are disposed between a pair of protrusions 37 provided on the second vertical frame part 33 of the frame case 30. The pair of protrusions 37 are anti-slip parts that prevent the second connection parts 75 from slipping out of the second vertical frame part 33 in the +Z direction.

Here, when the movable body 5 and the fixed body 8 are connected via the gimbal mechanism 7 and the rotation support mechanism 6, the body 40A of the fixed body 8, i.e., the body 40A of the stopper case 40, is located radially outside the movable body 5 and the gimbal spring 70. Also, as shown in Figures 4, 6, and 7, the gimbal spring 70 and the holder 16 are located radially outside the camera module main body 4a, in the -Z direction from the end face of the camera module main body 4a in the +Z direction. The fixed body 8 is located radially outside the movable body 5, in the -Z direction from the end face of the camera module main body 4a in the +Z direction. Therefore, parts of the movable body 5 and the gimbal mechanism 7 in the +Z direction protrude from the stopper case 40 in the +Z direction.

(Shake correction magnetic drive mechanism and rolling correction magnetic drive mechanism)
As shown in FIG. 5, when the movable body 5 is supported by the fixed body 8 via the gimbal mechanism 7 and the rotation support mechanism 6, the first magnet 111 fixed to the side surface of the movable body 5 in the -Y direction and the first coil 112 fixed to the stopper case 40 face each other in the radial direction. As a result, the first magnet 111 and the first coil 112 constitute the first shake correction magnetic drive mechanism 11. Therefore, the movable body 5 rotates around the X axis when the first coil 112 is powered. Here, the distance E1 (first distance) between the first magnet 111 and the first coil 112 in the Y axis direction is shorter than the circumferential width dimension D1 (see FIG. 10) of the opening 166 provided in the holder frame 162 adjacent to the first magnet 111 in the circumferential direction.

When the movable body 5 is supported by the fixed body 8 via the gimbal mechanism 7 and the rotation support mechanism 6, the second magnet 121 fixed to the -X direction side of the movable body 5 and the second coil 122 fixed to the stopper case 40 face each other in the radial direction. As a result, the second magnet 121 and the second coil 122 constitute the second shake correction magnetic drive mechanism 12. Therefore, when the second coil 122 is supplied with power, the movable body 5 rotates around the Y axis. Here, the distance E2 (first distance) between the second magnet 121 and the second coil 122 in the X axis direction is shorter than the circumferential width dimension D1 (see FIG. 10) of the opening 167 provided circumferentially adjacent to the second magnet 121 in the holder frame 162.

Furthermore, when the movable body 5 is supported by the fixed body 8 via the gimbal mechanism 7 and the rotation support mechanism 6, the rolling correction magnet 131 fixed to the side surface of the movable body 5 in the +Y direction and the rolling correction coil 132 fixed to the stopper case 40 face each other in the radial direction. As a result, the rolling correction magnet 131 and the rolling correction coil 132 constitute the rolling correction magnetic drive mechanism 13. Therefore, the movable body 5 rotates around the optical axis L by supplying power to the rolling correction coil 132. Here, as shown in FIG. 3 and FIG. 10, the distance E3 (second distance) by which the first magnet 111 and the first coil 112 are separated in the Y-axis direction is shorter than the width dimension D2 in the Z-axis direction of the opening 168 provided next to the rolling correction magnet 131 in the +Z direction in the holder frame part 162.

When the movable body 5 is supported by the fixed body 8 via the gimbal mechanism 7 and the rotation support mechanism 6, the magnetic member placement recess 48 of the stopper case 40 and the magnetized polarization line 111c of the first magnet 111 overlap when viewed from the radial direction. Similarly, the second magnetic member 123 placed in the magnetic member placement recess 48 overlaps with the magnetized polarization line 121c of the second magnet 121. Then, when no power is supplied to the first coil 112 and the second coil 122, the magnetic attraction force acting between the first magnetic member 113 and the first magnet 111 and the magnetic attraction force acting between the second magnetic member 123 and the second magnet 121 causes the attitude of the movable body 5 to become a reference attitude in which the optical axis of the camera module 4 coincides with the Z axis, which is the reference axis.

Furthermore, when the movable body 5 is supported by the fixed body 8 via the gimbal mechanism 7 and the rotation support mechanism 6, as shown in FIG. 6, in the stopper case 40, the first case protrusion 45A protruding from a diagonal position in the first axis R1 direction toward the inner periphery is located between two arms 73 extending from the first connection part 74 of the gimbal spring 70 on both sides in the circumferential direction. Also, the first case protrusion 45A faces the first central part 74b of the +Z direction edge of the first connection part 74 with a predetermined first gap Q1 in the Z axis direction. Furthermore, the first case protrusion 45A has its bent part 45b facing the holder 16 with a small gap in the first axial direction. Also, in the stopper case 40, the second case protrusion 45B protruding from a diagonal position in the second axis R2 direction toward the inner periphery is located between two arms 73 extending from the second connection part 75 on both sides in the circumferential direction. Furthermore, the second case protrusion 45B faces the second central portion 75b of the +Z-direction edge of the second connection portion 75 with a predetermined second gap Q2 in the Z-axis direction.

Here, the pair of second case protrusions 45B defines the rotation angle range of the movable body 5 around the first axis R1. That is, when the movable body 5 rotates to a predetermined rotation angle around the first axis R1, each second case protrusion 45B abuts against the second connection portion 75 of the gimbal spring 70, which rotates together with the movable body 5, from the front in the rotation direction, preventing the gimbal spring 70 from rotating any further around the first axis R1. Therefore, the second case protrusions 45B can define the rotation angle range of the movable body 5 around the first axis R1.

The pair of first case protrusions 45A also define the rotation angle range of the movable body 5 around the second axis R2. That is, when the movable body 5 rotates to a predetermined rotation angle around the second axis R2, each first case protrusion 45A abuts against the first connection portion 74 of the gimbal spring 70, which rotates with the movable body 5, from the front in the rotation direction, preventing the gimbal spring 70 from rotating any further around the second axis R2. Therefore, the first case protrusions 45A can define the rotation angle range of the movable body 5 around the second axis R2.

Furthermore, the pair of first case projections 45A regulate the range of movement of the movable body 5 in the first axis R1 direction when an external impact or the like is applied. That is, when the movable body 5 moves to one side in the first axis R1 direction due to an external impact or the like, the bent portion 45b of the first case projection 45A located on one side in the first axis R1 direction abuts against the holder 16 from the front in the moving direction, restricting the movable body 5 from moving further to one side in the first axis R1 direction. Also, when the movable body 5 moves to the other side in the first axis R1 direction due to an external impact or the like, the bent portion 45b of the first case projection 45A located on the other side in the first axis R1 direction abuts against the holder 16 from the front in the moving direction, restricting the movable body 5 from moving further to the other side in the first axis R1 direction.

(Action and Effect)
According to this example, the movable body 5 has a holder 16 including a holder frame portion 162 that surrounds the camera module 4 from the radial outside. The holder 16 is made of a magnetic metal, and the first magnet 111 and the second magnet 121 of the shake correction magnetic drive mechanism 10 are fixed to the outer surface of the holder frame portion 162. In addition, the first coil 112 and the second coil 122 of the shake correction magnetic drive mechanism 10 are fixed to the fixed body 8 and face the first magnet 111 and the second magnet 121 in the radial direction. This allows the holder 16 to function as a yoke of the shake correction magnetic drive mechanism 10. Therefore, in the shake correction magnetic drive mechanism 10, it is easy to ensure the driving force that drives the movable body 5.

The holder frame 162 also has an opening 116 that overlaps with the magnetized polarization line 111c of the first magnet 111 when viewed from the circumferential direction at a position adjacent to the first magnet 111 in the circumferential direction. This makes it possible to prevent or suppress a part of the magnetic flux of the first magnet 111 that runs from one side of the magnetized polarization line 111c to the other side in the region of the holder frame 162 adjacent to the first magnet 111 in the circumferential direction from being short-circuited. Therefore, the magnetic flux of the first magnet 111 can be efficiently used as a driving force for driving the movable body 5. Similarly, the holder frame 162 has an opening 117 that overlaps with the magnetized polarization line 121c of the second magnet 121 when viewed from the circumferential direction at a position adjacent to the second magnet 121 in the circumferential direction. This makes it possible to prevent or suppress short-circuiting of part of the magnetic flux of the second magnet 121 that travels from one side of the magnetized polarization line 121c to the other side in the region of the holder frame 162 adjacent to the second magnet 121 in the circumferential direction. Therefore, the magnetic flux of the second magnet 121 can be efficiently used as a driving force for driving the movable body 5.

Furthermore, the opening 116 is provided along the first side wall surface 111a of the first magnet 111. Therefore, by inserting a positioning jig into the opening 116 and adhering the first magnet 111 to the holder frame portion 162 while contacting the jig, the first magnet 111 can be positioned in the circumferential direction. Similarly, the opening 117 is provided along the first side wall surface 111a of the second magnet 121. Therefore, by inserting a positioning jig into the opening 116 and adhering the second magnet 121 to the holder frame portion 162 while contacting the jig, the second magnet 121 can be positioned in the circumferential direction.

The width dimension D1 of the opening 116 in the circumferential direction is equal to or greater than the distance E1 between the first magnet 111 and the first coil 112 in the radial direction. Therefore, the magnetic flux from the first magnet 111 in the circumferential direction can be directed toward the first coil 112. Therefore, it is easier to prevent the magnetic flux of the first magnet 111 from shorting out at the holder frame 162. Similarly, the width dimension D1 of the opening 117 in the circumferential direction is equal to or greater than the distance E2 between the second magnet 121 and the second coil 122 in the radial direction. Therefore, the magnetic flux from the second magnet 121 in the circumferential direction can be directed toward the second coil 122. Therefore, it is easier to prevent the magnetic flux of the second magnet 121 from shorting out at the holder frame 162.

Furthermore, the holder frame 162 has, as the opening 116, a one-side opening 116a provided on one side in the circumferential direction of the first magnet 111, and 116b provided on the other side. Therefore, it is possible to prevent or suppress the magnetic flux of the first magnet 111 from being short-circuited on both sides in the circumferential direction of the first magnet 111 in the holder frame 162. Similarly, the holder frame 162 has, as the opening 117, a one-side opening 117a provided on one side in the circumferential direction of the second magnet 121, and 117b provided on the other side. Therefore, it is possible to prevent or suppress the magnetic flux of the second magnet 121 from being short-circuited on both sides in the circumferential direction of the second magnet 121 in the holder frame 162.

In this example, the magnet fixing region 162a overlapping the first magnet 111 on the outer surface of the holder frame 162 has a plurality of recesses 164. An adhesive layer 165 is interposed between the first magnet 111 and the magnet fixing region 162a. As a result, the adhesive forming the adhesive layer 165 is held in the recesses 164, so that the first magnet 111 can be firmly fixed to the holder frame 162. Similarly, the magnet fixing region 162b overlapping the second magnet 121 on the outer surface of the holder frame 162 has a plurality of recesses 164. An adhesive layer 165 is interposed between the second magnet 121 and the magnet fixing region 162b. As a result, the adhesive forming the adhesive layer 165 is held in the recesses 164, so that the second magnet 121 can be firmly fixed to the holder frame 162.

Furthermore, each of the multiple recesses 164 is a groove extending in the Z-axis direction. Also, one end of the groove in the Z-axis direction reaches the outside of the magnet fixing areas 162a, 162b. Therefore, in this example, after the first magnet 111 and the second magnet 121 are attracted to the holder frame portion 162, adhesive is applied from the +Z direction of the first magnet 111 and the second magnet 121, so that an adhesive layer 165 can be formed between the first magnet 111 and the magnet fixing area 162a and between the second magnet 121 and the magnet fixing area 162b.

In addition, in this example, the gimbal mechanism 7 supports the movable body 5 via the rotation support mechanism 6 by supporting the rotation support mechanism 6 so that the rotation is possible around the first axis R1 and the second axis R2. Therefore, the movable body 5 is rotatable around the first axis R1 and the second axis R2 while being rotatable around the optical axis L. Therefore, shake correction can be performed by rotating the movable body 5 around the optical axis L, the first axis R1, and the second axis R2.

Furthermore, the rolling correction magnetic drive mechanism 13 includes a rolling correction magnet 131 arranged in the circumferential direction of the first magnet 111 and the second magnet 121 and fixed to the outer surface of the holder frame portion 162, and a rolling correction coil 132 fixed to the fixed body 8 and facing the rolling correction magnet 131 in the radial direction with a predetermined gap therebetween. Therefore, the holder 16 functions as a yoke for the rolling correction magnetic drive mechanism 13 that drives the movable body 5 around the optical axis L. This makes it easy for the rolling correction magnetic drive mechanism 13 to ensure the driving force that drives the movable body 5.

The rolling correction magnet 131 is polarized in two directions in the circumferential direction, and its second magnetized polarization line extends in the Z-axis direction. The holder frame 162 has an opening 168 at a position adjacent to the rolling correction magnet 131 in the Z-axis direction. When viewed from the Z-axis direction, the second magnetized polarization line and the opening 168 overlap. This makes it possible to prevent or suppress short-circuiting of part of the magnetic flux of the rolling correction magnet 131 that runs from one side of the second magnetized polarization line to the other side in the region of the holder frame 162 adjacent to the rolling correction magnet 131 in the Z-axis direction. Therefore, the magnetic flux of the rolling correction magnet 131 can be efficiently used as a driving force for driving the movable body 5.

The opening 168 is provided along the rolling correction magnet 131. Therefore, by inserting a positioning jig into the opening 168 and adsorbing the rolling correction magnet 131 to the holder frame 162 while contacting the jig, the rolling correction magnet 131 can be positioned in the Z-axis direction.

Furthermore, the width dimension D2 of the opening 168 in the Z-axis direction is equal to or greater than the distance E3 between the rolling correction magnet 131 and the rolling correction coil 132 in the radial direction. This makes it easier to direct the magnetic flux from the rolling correction magnet 131 in the Z-axis direction in the radial direction. This makes it easier to prevent the magnetic flux of the rolling correction magnet 131 from being short-circuited at the holder frame portion 162.
(Modification)
The stopper case 40 (body portion 40A) of the stationary body may be made of resin. In this case, the magnetic members 113, 123 are fixed to the body portion 40A by an adhesive. Therefore, an adhesive layer 165 is provided between the body portion 40A and the magnetic members 113, 123.

To form the first connection mechanism 71, a first axis side protrusion 80 that protrudes outward on the first axis R1 may be provided at the tip of the plate holder extension 67, and a first axis side recess that rotatably receives the first axis side protrusion may be provided on the first axis R1 of the first connection part 74 of the gimbal spring. Similarly, to form the second connection mechanism 72, a second axis side protrusion may be provided on the second axis R1 of the second connection part 75 of the gimbal spring, and a second axis side recess that rotatably receives the second axis side protrusion may be provided on the second axis R2 of the plate part 36 of each second vertical frame part 33 of the frame case 30.

Here, when only the correction of the yaw direction YAW around the X axis and the pitch direction PITCH around the Y axis is performed as the shake correction, the rotation support mechanism 6 may be omitted from the optical unit 1 with shake correction function. In this case, the optical unit 1 with shake correction function has a movable body 5 having a camera module 4, a gimbal mechanism 7 that supports the movable body 5 rotatably around a first axis R1 that intersects with the optical axis L of the lens of the camera module 4 and supports the movable body 5 rotatably around a second axis R2 that intersects with the optical axis L and the first axis, a fixed body 8 that supports the movable body 5 via the gimbal mechanism 7, and a shake correction magnetic drive mechanism 10 that rotates the movable body 5 around the first axis R1 and the second axis R2. In this case, the shaft portion 61 is omitted from the holder 16. Also, the plate holder 63 is integrated with the holder 16 to form the holder 16 for the movable body 5. This allows the rotation support mechanism 6 to be omitted.

Reference Signs List 1...Optical unit with shake correction function, 2...Lens, 3...Imaging element, 4...Camera module, 4a...Camera module main body, 4b...Lens barrel portion, 5...Movable body, 6...Rotational support mechanism, 7...Gimbal mechanism, 8...Fixed body, 9...Elastic support member, 10...Shake correction magnetic drive mechanism, 11...First shake correction magnetic drive mechanism, 12...Second shake correction magnetic drive mechanism, 13...Rolling correction magnetic drive mechanism, 14...Flexible printed circuit board, 15...Flexible printed circuit board for power supply, 16...Holder, 16a...End surface of holder, 20...Cover bottom, 23...Second elastic engagement portion, 24...Second lock portion, 25...circular hole, 26...third elastic engagement portion, 27...engagement hole, 30...frame case, 31...rectangular frame portion, 32...first vertical frame portion, 33...second vertical frame portion, 34, 26...plate portion, 35, 38...projection portion, 36a...through hole, 37...projection, 39...second shaft side cylinder portion, 40...stopper case, 40A...body portion, 41...first case wall, 42...second case wall, 43...third case wall, 44...end plate portion, 45A...first case projection, 45a...extension portion, 45b...bent portion, 45B...second case projection, 46...hook, 46a...opening portion, 47...recess, 48...magnetic member arrangement recess, 49...engagement hole, 50...FPC cover , 52...hook portion, 53...locking portion, 54...welding mark, 56...second shaft side protrusion, 60...body portion, 61...shaft portion, 62...bearing mechanism, 63...plate holder, 64...attraction magnet, 65...plate holder cylindrical portion, 66...plate holder annular portion, 67...plate holder extension portion, 68...first shaft side recess, 70...gimbal spring, 71...first connection mechanism, 72...second connection mechanism, 73...arm portion, 74...first connection portion, 74a...first end portion, 74b...first central portion, 74c...through hole, 75...second connection portion, 75a...second end portion, 75b...second central portion, 77...first shaft side cylindrical portion, 78...pair of protrusions , 79...second shaft side recess, 80...first shaft side protrusion, 111...first magnet, 111a...first side wall surface, 111b...second side wall surface, 111c...magnetized polarization line, 112...first coil, 113...first magnetic member, 116...opening, 121...second magnet, 121a...first side wall surface, 121b...second side wall surface, 121c...magnetized polarization line, 122...second coil, 123...second magnetic member, 131...rolling correction magnet, 131a...first side wall surface, 131b...pair of second side surfaces, 131c...magnetized polarization line, 132...rolling correction coil, 151...first coil fixing portion, 152...second
Coil fixing portion, 153...third coil fixing portion, 160...notch portion, 161...holder bottom portion, 162...holder frame portion, 162a...magnet fixing region, 162b...magnet fixing region, 162c...magnet fixing region, 163...camera module accommodating recess, 163a...holder opening, 164...recess, 165...adhesive layer, 166...opening, 166a...one side opening, 166b...other side opening, 167 ...opening, 167a...one side opening, 167b...other side opening, 168...opening, 440...case positioning hole, 610...step portion, 621...inner ring, 622...outer ring, 623...sphere, 624...retainer, 710...first shaft side shaft, 720...second shaft side shaft, 731...first inclined portion, 732...second inclined portion, 733...connecting portion, 734...bent portion, 761...projecting portion, 762...bent portion, 763...straight portion

Claims (6)

a movable body including a camera module and a holder for holding the camera module;
a gimbal mechanism that supports the movable body rotatably about a first axis that intersects with an optical axis of the camera module and supports the movable body rotatably 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;
a shake correction magnetic drive mechanism that rotates the movable body about the first axis and about the second axis;
a rotation support mechanism that supports the movable body so as to be rotatable around the optical axis;
a rolling correction magnetic drive mechanism for rotating the movable body around the optical axis,
the holder is made of a magnetic metal and includes a frame portion that surrounds the camera module from a radially outer side,
the shake correction magnetic drive mechanism includes a shake correction magnet fixed to an outer surface of the frame portion, and a shake correction coil supported by the fixed body and facing the shake correction magnet in a radial direction at a predetermined first distance,
the shake correction magnet is bipolarized in the optical axis direction, and a first magnetized polarization line extends in a circumferential direction;
the frame portion includes a first opening portion provided along the shake correction magnet at a position adjacent to the shake correction magnet in the circumferential direction,
When viewed from the circumferential direction, the first magnetized polarization line and the first opening portion overlap each other,
the gimbal mechanism supports the rotary support mechanism rotatably about the first axis and the second axis, thereby supporting the movable body via the rotary support mechanism;
the rolling correction magnetic drive mechanism includes a rolling correction magnet arranged in the circumferential direction of the shake correction magnet and fixed to the outer surface of the frame portion, and a rolling correction coil held by the fixed body and facing the rolling correction magnet in the radial direction at a predetermined second distance,
the rolling correction magnet is polarized into two poles in the circumferential direction, and the second magnetized polarization line extends in the optical axis direction;
the frame portion includes a second opening at a position adjacent to the rolling correction magnet in the optical axis direction,
The optical unit with shake correction function , wherein the second magnetized polarization line and the second opening portion overlap when viewed from the optical axis direction . The optical unit with shake correction function according to claim 1, characterized in that the first width dimension of the first opening in the circumferential direction is equal to or greater than the first separation between the shake correction magnet and the shake correction coil in the radial direction. the shake correction magnet has a rectangular parallelepiped shape and includes a pair of first side wall surfaces extending in the optical axis direction on both sides in the circumferential direction,
The optical unit with shake correction function described in claim 1 or 2, characterized in that the frame portion has, as the first opening, a one-side opening extending linearly in the optical axis direction along one of the first side wall surfaces, and a other-side opening extending linearly in the optical axis direction along the other first side wall surface. a first magnet fixing region that overlaps with the shake correction magnet on the outer surface of the frame portion is provided with a plurality of first recesses,
4. The optical unit with shake correction function according to claim 1, further comprising an adhesive layer between the first magnet fixing region and the shake correction magnet. Each of the plurality of first recesses is a groove extending in the optical axis direction,
5. The optical unit with shake correction function according to claim 4, wherein one end of the groove in the optical axis direction reaches the outside of the first magnet fixing region on the outer surface. 6. The optical unit with shake correction function according to claim 1, wherein a second width dimension of the second opening in the optical axis direction is equal to or greater than a second separation between the rolling correction magnet and the rolling correction coil in the radial direction.

Images