JP7686495B2 - 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 two axes perpendicular to the optical axis.

Among the optical units mounted on mobile terminals and mobile objects, there are some that rotate the movable body on which the camera module is mounted around a specific 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 the document includes a movable body having a camera module, a fixed body, a support mechanism that supports the movable body rotatably around the optical axis relative to the fixed body, and a magnetic drive mechanism that rotates the movable body around the optical axis. A flexible printed circuit board connected to the camera module is pulled out from the movable body. The flexible printed circuit board is pulled out from the movable body with its thickness direction facing the optical axis direction, and then bent 90 degrees in the optical axis direction. The flexible printed circuit board is then pulled in an L-shape along the outer peripheral wall of the movable body with its thickness direction facing a direction perpendicular to the optical axis. The flexible printed circuit board is further bent 90 degrees from the tip of the L-shape toward the outer periphery and fixed to the fixed body. A reinforcing plate for maintaining the bent shape is fixed to each of the two bent portions of the flexible printed circuit board. When the movable body rotates around the optical axis for shake correction, the flexible printed circuit board bends between the movable body and the fixed body.

JP 2020-27134 A

Some optical units with shake correction function perform shake correction by rotating a movable body about a first axis perpendicular to the optical axis and about a second axis perpendicular to the optical axis and the first axis. If the flexible printed circuit board described in Cited Document 1 is used in such an optical unit with shake correction function, when the movable body rotates about the first axis and the second axis, the part that is routed with its thickness direction facing in a direction perpendicular to the optical axis is unlikely to bend, and the load for swinging the movable body increases.

In view of these points, the object of the present invention is to provide an optical unit with a shake correction function that can prevent the rotation of a movable body that rotates around two axes perpendicular to the optical axis from being hindered by a flexible printed circuit board.

In order to solve the above problems, the optical unit with shake correction function of the present invention includes a movable body having a camera module, a support body, and three mutually orthogonal axes defined as an X-axis, a Y-axis, and a Z-axis, and when an optical axis of the camera module is aligned with the Z-axis, a swing support mechanism that supports the movable body relative to the support body so that it can swing about the X-axis and supports the movable body so that it can swing about the Y-axis, a swing drive mechanism that swings the movable body about the X-axis and about the Y-axis, and a flexible printed circuit board drawn out from the movable body, wherein a swing center point of the movable body where the X-axis, Y-axis, and Z-axis intersect is located inside the movable body, and the flexible printed circuit board has a thickness direction aligned with the Z-axis. the movable body is pulled around in a state facing the movable body toward the tip, and is characterized in that it comprises, in order from the movable body toward the tip, a pull-out section that is pulled out in the X-axis direction from a position in the Z-axis direction that is different from the swing center point of the movable body, a meandering section that meanders one or more times in the Z-axis direction toward the swing center point so as to overlap with the pull-out section when viewed from the Z-axis direction, a first extension section that extends in a first extension direction that is different from the X-axis direction from a final meandering section of the meandering section that is located on the opposite side to the pull-out section in the Z-axis direction, and a second extension section that extends in a second extension direction that is different from the first extension direction from an end portion of the first extension section that is on the opposite side to the final meandering section, and the final meandering section overlaps an XY plane that includes the X-axis and the Y-axis.

According to the present invention, the flexible printed circuit board drawn out from the movable body is drawn around with its thickness direction facing the Z-axis direction, and includes a first extension portion and a second extension portion extending in two different directions. Therefore, when the movable body rotates around the X-axis and the Y-axis perpendicular to the Z-axis, the first extension portion and the second extension portion are more likely to bend than when the flexible printed circuit board is drawn around with its thickness direction facing the Z-axis direction. In addition, after the flexible printed circuit board is drawn out in the X-axis direction from a position different from the swing center point of the movable body in the Z-axis direction, it meanders in the Z-axis direction to reach the XY plane including the X-axis and the Y-axis, and then extends in the first extension direction and the second extension direction. As a result, the first extension portion is drawn out in the first extension direction from a position close to the swing center point in the Z-axis direction. In addition, since the second extension portion is continuous with the first extension portion, it can be drawn around a position close to the swing center point in the Z-axis direction. Here, if the first and second extensions extending in two directions are routed in a position close to the center of rotation in the Z-axis direction, the flexible printed circuit board is more likely to bend when the movable body rotates around the X-axis and the Y-axis, compared to when they are routed in a position away from the center of rotation in the Z-axis direction. Therefore, the rotation of the movable body can be prevented from being hindered by the flexible printed circuit board. In addition, in the present invention, the flexible printed circuit board meanders in the meandering portion and is not bent at a specific angle. Therefore, when assembling the optical unit with shake correction function, it is not necessary to bend the flexible printed circuit board at a specific angle. Therefore, the optical unit with shake correction function can be easily assembled.

In the present invention, the support body includes a frame body that surrounds the movable body from the radial outside, and the first extension portion and the second extension portion can be routed along the frame body on the radial outside of the frame body. In this way, the flexible printed circuit board can be routed in the vicinity of the support body, making it easier to prevent the occupation area of the optical unit with shake correction function from becoming large when viewed from the Z-axis direction.

In this case, the frame body includes a first frame portion and a second frame portion that face each other in the X-axis direction and extend parallel to the Y-axis direction, and a pair of a third frame portion and a fourth frame portion that face each other in the Y-axis direction and extend parallel to the X-axis direction, and the pull-out portion is pulled out from the second frame portion in the X-axis direction, the first extension direction is the Y-axis direction, the first extension portion extends along the second frame portion, the second extension direction is the X-axis direction, and the second extension portion extends along the fourth frame portion.

In this case, it is preferable that the pull-out portion is pulled out in the X-axis direction from a position in the second frame portion that is closer to the third frame portion in the Y-axis direction than the fourth frame portion. In this way, the first extension portion that extends in the Y-axis direction along the second frame portion can be provided longer, making it easier to deflect the flexible printed circuit board when the movable body rotates around the X-axis and the Y-axis.

In the present invention, when the meandering section meanders once, a spacer may be fixed between the lead-out section and a meandering portion of the meandering section that faces the lead-out section in the Z-axis direction, which makes it easy to maintain the shape of the meandering section that meanders in the Z direction in the flexible printed circuit board.

In the present invention, when the meandering section meanders multiple times, a first spacer can be fixed between the meandering section facing the pull-out section in the Z-axis direction in the meandering section and the pull-out section, and a second spacer can be fixed between two adjacent meandering sections in the Z-axis direction in the meandering section. In this way, it becomes easier to maintain the shape of the meandering section that meanders in the Z direction in the flexible printed circuit board.

In the present invention, the flexible printed circuit board includes a first flexible printed circuit board and a second flexible printed circuit board that are pulled out from the movable body while being stacked in the Z-axis direction, and it is preferable that the meandering portion meanders twice. In this way, the flexible printed circuit board is more likely to bend when the movable body rotates around the first axis and the second axis than when a single wide flexible printed circuit board is pulled out from the movable body and pulled around. In addition, by making the flexible printed circuit board meander twice in the meandering portion, it is possible to suppress the difference between the first distance over which the first flexible printed circuit board is pulled and the second distance over which the second flexible printed circuit board is pulled in the meandering portion. Therefore, it is possible to prevent or suppress the formation of wrinkles in one of the two meandering flexible printed circuit boards. Therefore, it is possible to prevent or suppress the flexible printed circuit board from becoming difficult to bend due to wrinkles generated in one flexible printed circuit board.

According to the present invention, the flexible printed circuit board connected to the movable body is drawn around with its thickness direction facing the Z-axis direction, and includes a first extension portion and a second extension portion extending in two different directions. The first extension portion is drawn out in the first extension direction from a position close to the swing center point in the Z-axis direction. Furthermore, since the second extension portion is continuous with the first extension portion, it can be drawn around a position close to the swing center point in the Z-axis direction. Therefore, when the movable body rotates around the X-axis and the Y-axis, the first extension portion and the second extension portion are easily bent. This makes it possible to prevent the rotation of the movable body from being hindered by the flexible printed circuit board.

FIG. 2 is a perspective view of an optical unit with a shake correction function. FIG. 2 is a plan view of an optical unit with a shake correction function. FIG. 2 is an exploded perspective view of an optical unit with a shake correction function. 3 is a cross-sectional view taken along line AA in FIG. 2. 3 is a cross-sectional view taken along line BB in FIG. 2. 3 is a cross-sectional view taken along line CC of FIG. 2. FIG. 2 is an explanatory diagram of a flexible printed circuit board. FIG. 13 is a perspective view of a modified optical unit with a shake correction function. FIG. 11 is a cross-sectional view of a modified optical unit with a shake correction function.

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 with a shake correction function. Fig. 2 is a plan view of the optical unit with a shake correction function. Fig. 3 is an exploded perspective view of the optical unit with a shake correction function. Fig. 4 is a cross-sectional view taken along line A-A in Fig. 2. Fig. 5 is a cross-sectional view taken along line B-B in Fig. 2. Fig. 6 is a cross-sectional view taken along line CC in Fig. 2.

As shown in FIG. 1, the optical unit 1 with shake correction function has a camera module 3 equipped with a lens 2. 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 will be 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 3 based on the acceleration, angular velocity, amount of shake, etc. detected by detection means such as a gyroscope.

The optical unit 1 with shake correction function performs shake correction by rotating the camera module 3 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. In this way, the optical unit 1 with shake correction function performs pitch correction and yawing correction.

In the following, the three mutually orthogonal axes are the X-axis, Y-axis, and Z-axis, and the optical unit with shake correction function is described with the optical axis L of the camera module 3 aligned with the Z-axis. The directions along the X-axis, Y-axis, and Z-axis are the X-axis, Y-axis, and Z-axis directions. 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 direction along the optical axis L of the lens 2 provided in the camera module 3. The -Z direction is the image side of the camera module 3, and the +Z direction is the subject side of the camera module 3. The first axis R1 and the second axis R2 are inclined 45 degrees around the Z axis (around the optical axis L) with respect to the X-axis and Y-axis.

As shown in Figures 1 and 2, the optical unit 1 with shake correction function has a movable body 5 equipped with a camera module 3, a swing support mechanism 6 that supports the movable body 5 rotatably around a first axis R1 and a second axis R2, and a support body 7 that supports the movable body 5 via the swing support mechanism 6. The support body 7 supports the movable body 5 via the swing support mechanism 6 so that it can swing around the first axis R1 and the second axis R2.

The optical unit 1 with shake correction function also includes a flexible printed circuit board 8 that is pulled out from the movable body 5 to the outside of the support body 7. The flexible printed circuit board 8 is pulled out from the movable body 5 in the +X direction, meanders in the +Z axis direction, then extends in the +Y direction, and then extends in the -X direction. A connector 9 is fixed to the tip of the flexible printed circuit board 8. The connector 9 is connected to a board (not shown) of the optical device on which the optical unit 1 with shake correction function is mounted. Therefore, the tip portion of the flexible printed circuit board 8 is in a fixed state.

Furthermore, as shown in FIG. 3, the optical unit 1 with shake correction function has a shake correction magnetic drive mechanism 10 (oscillating drive mechanism) 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. The first shake correction magnetic drive mechanism 11 is disposed in the +Y direction of the movable body 5. The second shake correction magnetic drive mechanism 12 is disposed in the -X direction of the movable body 5. The first shake correction magnetic drive mechanism 11 and the second shake correction magnetic drive mechanism 12 are arranged in the circumferential direction around the optical axis L. The optical unit 1 with shake correction function also includes a flexible printed circuit board 13 that is drawn around the outer circumferential surface of the support 7 and then drawn out in the +Y direction.

As shown in FIG. 1, the movable body 5 rotates in a yaw direction YAW around the X axis and in a pitch direction PITCH around the Y axis by combining rotations around the first axis R1 and the second axis R2.

(movable body)
3, the movable body 5 includes a camera module 3 and a holder 16 that surrounds the camera module 3 from the outer periphery. The camera module 3 includes a body portion 17 that is substantially rectangular parallelepiped shaped and a lens barrel portion 18 that protrudes in the +Z direction from the center of the body portion 17. The lens 2 is housed in the lens barrel portion 18. An imaging element 19 is housed in the end portion of the body portion 17 in the -Z direction. A flexible printed circuit board 8 is drawn out from the end portion of the body portion 17 in the -Z direction. The flexible printed circuit board 8 is electrically connected to the imaging element 19.

The holder 16 is made of resin. The holder 16 surrounds the main body 17 of the camera module 3 from the radial outside. The lens barrel 18 of the camera module 3 protrudes in the +Z direction beyond the holder 16. The holder 16 has a first side wall 21 and a second side wall 22 extending parallel to the Y axis direction, and a third side wall 23 and a fourth side wall 24 extending parallel to the X axis direction. The first side wall 21 is located in the -X direction of the second side wall 22. The third side wall 23 is located in the -Y direction of the fourth side wall 24. The movable body 5 also has a fifth side wall 25 and a sixth side wall 26 located diagonally in the first axis R1 direction, and a seventh side wall 27 and an eighth side wall 28 located diagonally in the second axis R2 direction. The fifth side wall 25 is located in the -X direction of the sixth side wall 26. The seventh side wall 27 is located in the -Y direction of the eighth side wall 28.

A second magnet 36 is fixed to the first side wall 21. The second magnet 36 is divided into two parts in the Z-axis direction. A first magnet 35 is fixed to the fourth side wall 24. The first magnet 35 is divided into two parts in the Z-axis direction. The flexible printed circuit board 8 passes through a notch 22a (see FIG. 6) provided at the end of the second side wall 22 in the -Z direction and is pulled out from the movable body 5 in the +X direction.

(Support)
3, the support 7 includes a rectangular frame body 30 that surrounds the holder 16 of the movable body 5 from the radial outside, and a bottom plate 39 that closes an opening in the -Z direction of the frame body 30. The frame body 30 includes a first frame portion 31 and a second frame portion 32 that face each other in the X-axis direction, and a third frame portion 33 and a fourth frame portion 34 that face each other in the Y-axis direction. The first frame portion 31 is located in the -X direction of the second frame portion 32. The third frame portion 33 is located in the -Y direction of the fourth frame portion 34.

The first frame portion 31 has a second coil retaining hole 31a (see FIG. 7) that penetrates in the X-axis direction. The second coil retaining hole holds the second coil 38. The fourth frame portion 34 has a first coil retaining hole (not shown) that penetrates in the Y-axis direction. The first coil 37 is held in the first coil retaining hole. The first coil 37 and the second coil 38 are each oval air-core coils that are long in the circumferential direction. Here, the first coil 37 and the second coil 38 are electrically connected to a flexible printed circuit board 13 that is routed along the outer surface of the frame body 30.

As shown in Figures 3 and 6, the second frame portion 32 has a notch portion 32a. The flexible printed circuit board 8 pulled out from the movable body 5 is pulled out in the +X direction of the frame body 30 through the notch portion 32a.

(Swing support mechanism)
As shown in FIG. 2, the swing support mechanism 6 includes a gimbal frame 40 and a gimbal frame 4
The swing support mechanism 6 includes a first connection mechanism 41 that connects the gimbal frame 40 and the support 7 rotatably about a first axis R1, and a second connection mechanism 42 that connects the gimbal frame 40 and the movable body 5 rotatably about a second axis R2. The swing support mechanism 6 connects the movable body 5 and the support 7 on the inner periphery side of the frame 30.

The gimbal frame 40 is made of a metal leaf spring. The gimbal frame 40 has a gimbal frame main body 45 having an opening 45a through which the lens barrel 18 of the movable body 5 penetrates in the Z-axis direction. As shown in FIG. 3, the gimbal frame 40 has a pair of first gimbal frame extensions 46 that protrude from the gimbal frame main body 45 toward both sides in the first axis R1 direction and extend in the -Z direction, and a pair of second gimbal frame extensions 47 that protrude from the gimbal frame main body 45 toward both sides in the second axis R2 direction and extend in the -Z direction. The gimbal frame main body 45 is located in the +Z direction of the holder 16, and overlaps with the main body 17 of the camera module 3 when viewed from the Z-axis direction. As shown in FIG. 4 and FIG. 5, the pair of first gimbal frame extensions 46 and the pair of second gimbal frame extensions 47 are located on the outer periphery of the holder 16. In addition, the pair of first gimbal frame extensions 46 and the pair of second gimbal frame extensions 47 are located on the inner periphery side of the frame body 30.

4, the first connection mechanism 41 includes first spheres 51 fixed to the -Z direction end portions of a pair of first gimbal frame extension portions 46 of the gimbal frame 40 and protruding radially outward on the first axis R1, and first metal receiving members 52 fixed to the recessed corners between the first frame portion 31 and the third frame portion 33 of the frame body 30 and the recessed corners between the third frame portion 33 and the fourth frame portion 34 of the frame body 30. Each first receiving member 52 includes a first concave surface 52a recessed radially outward on the first axis R1. As shown in FIG. 5, the second connection mechanism 42 includes second spheres 53 that are fixed to the -Z direction end portions of a pair of second gimbal frame extensions 47 of the gimbal frame 40 and protrude radially inward on the second axis R2, and second receiving members 54 that are fixed to the outer surfaces of the fifth side wall 25 and the sixth side wall 26 of the holder 16. Each second receiving member 54 includes a second concave surface 54a that is recessed radially inward on the second axis R2.

When the movable body 5 is supported by the support 7 via the swing support mechanism 6, as shown in FIG. 4, the gimbal frame 40 is inserted inside the pair of first receiving members 52 arranged on the first axis R1, and the first sphere 51 is brought into point contact with the first concave surface 52a on the first axis R1. This constitutes the first connection mechanism 41, so that the gimbal frame 40 can swing around the first axis R1 relative to the support 7. Also, when the movable body 5 is supported by the support 7 via the swing support mechanism 6, as shown in FIG. 5, the pair of second gimbal frame extensions 47 of the gimbal frame 40 are arranged outside the pair of second receiving members 54 arranged on the second axis R2, so that the second sphere 53 is brought into point contact with the second concave surface 54a on the second axis R2. This constitutes the second connection mechanism 42, so that the gimbal frame 40 can swing around the second axis R2 relative to the support 7. Therefore, the swing support mechanism 6 connects the movable body 5 to the support 7 in a state in which the movable body 5 can rotate around the first axis R1 and the second axis R2.

As shown in Figures 4, 5, and 6, the swing center point P about which the movable body 5 rotates around the X-axis and the Y-axis is the intersection point of the optical axis L, the first axis R1, and the second axis R2. The swing center point P is also the intersection point of the Z-axis, the Y-axis, and the Z-axis. The swing center point P is located inside the movable body 5.

(Shake correction magnetic drive mechanism)
In a state in which the movable body 5 is supported by the support 7 via the swing support mechanism 6, as shown in Fig. 6, the second magnet 36 fixed to the first side wall 21 of the holder 16 and the second coil 38 of the support 7 face each other with a gap in the X-axis direction. The second magnet 36 and the second coil 38 are
3, the first magnet 35 fixed to the fourth side wall 24 of the holder 16 and the first coil 37 fixed to the frame 30 of the support 7 face each other with a gap therebetween in the Y-axis direction. The first magnet 35 and the first coil 37 constitute the first shake correction magnetic drive mechanism 11.

In the shake correction magnetic drive mechanism 10, the movable body 5 is rotated around the X-axis by supplying power to the first coil 37. The movable body is rotated around the Y-axis by supplying power to the second coil 38. The shake correction magnetic drive mechanism 10 rotates the movable body 5 around the first axis R1 and the second axis R2 by combining the rotation of the movable body 5 around the X-axis by the first shake correction magnetic drive mechanism 11 and the rotation of the movable body 5 around the Y-axis by the second shake correction magnetic drive mechanism 12.

(Flexible Printed Circuit Board)
7 is an explanatory diagram of a flexible printed circuit board. As shown in FIG. 1, the flexible printed circuit board 8 drawn out from the movable body 5 is routed with the thickness direction facing the Z-axis direction. As shown in FIG. 6, the flexible printed circuit board 8 is drawn out in the +X direction from the end portion of the movable body 5 in the -Z direction, and includes a drawn-out portion 60 that extends to the radial outside of the frame body 30 through the cutout portion 32a of the frame body 30. As shown in FIG. 2, in this example, the drawn-out portion 60 is drawn out in the +X direction from the -Y direction side of the end portion of the camera module 3 in the -Z direction. Therefore, the drawn-out portion 60 is drawn out in the +X direction from a position in the second frame portion 32 that is closer to the third frame portion 33 than the fourth frame portion 34 in the Y-axis direction.

The flexible printed circuit board 8 also includes a meandering portion 61 that meanders so as to overlap with the draw-out portion 60 when viewed from the Z-axis direction. The meandering portion 61 runs from the draw-out portion 60 toward the swing center point P (+Z direction) in the Z-axis direction. In this example, as shown in Figs. 6 and 7, the meandering portion 61 meanders twice. Therefore, the meandering portion 61 includes a first curved portion 61a that curves in the -X direction from the end of the draw-out portion 60 in the +X direction toward the +Z direction, a first extension portion 61b that extends in the -X direction from the end portion of the first curved portion 61a opposite the draw-out portion 60 and faces the draw-out portion 60, a second curved portion 61c that curves in the +X direction from the end of the first extension portion 61b in the -X direction toward the +Z direction, and a second extension portion 61d that extends in the +X direction from the end portion of the second curved portion 61c opposite the first extension portion 61b and faces the first extension portion 61b. The second extension portion 61d is the final meandering portion of the meandering portion 61 located on the opposite side of the lead-out portion 60 in the Z-axis direction. As shown in FIG. 6, the final meandering portion (second extension portion 61d) is located on the XY plane that includes the X-axis and the Y-axis.

Furthermore, the flexible printed circuit board 8 includes, in order from the meandering portion 61 toward the tip, a first extension portion 62 extending in a first extension direction, and a second extension portion 63 extending in a second extension direction different from the first extension direction. The first extension portion 62 continues to the final meandering portion (second extension portion 61d). The second extension portion 63 continues to the first extension portion 62. In this example, the first extension direction is the Y-axis direction. Therefore, as shown in FIG. 2, the first extension portion 62 extends along the second frame portion 32 of the frame body 30. The second extension direction in which the second extension portion 63 extends is the -X direction. Therefore, the second extension portion 63 extends along the fourth frame portion 34 of the frame body 30. A connector 9 is fixed to the tip of the second extension portion 63. The second extension 63 is connected via the connector 9 to a substrate (not shown) of the optical device on which the optical unit 1 with shake correction function is mounted.

As shown in Figures 6 and 7, a first spacer 66 is fixed between the drawer 60 and the first extension portion 61b of the serpentine portion 61. A second spacer 67 is fixed between the first extension portion 61b and the second extension portion 61d that are adjacent in the Z-axis direction in the serpentine portion 61. The first spacer 66 and the second spacer 67 are the same member. Therefore, the thickness dimension in the Z-axis direction of the first spacer 66 and the thickness dimension in the Z-axis direction of the second spacer 67 are the same. Therefore, the meandering intervals are the same in the serpentine portion 61.

In this example, the flexible printed circuit board 8 includes a first flexible printed circuit board 71 and a second flexible printed circuit board 72, which are pulled out from the camera module 3 in the +X direction while overlapping in the Z-axis direction. The first flexible printed circuit board 71 is located in the -Z direction of the second flexible printed circuit board 72 at a position where it is pulled out from the camera module 3. Therefore, in the pull-out section 60, the first flexible printed circuit board 71 is located in the -Z direction of the second flexible printed circuit board 72. In the first curved portion 61a, the first flexible printed circuit board 71 is located on the outer periphery side of the second flexible printed circuit board 72. In the first extended portion 61b, the first flexible printed circuit board 71 is located in the +Z direction of the second flexible printed circuit board 72. In the second curved portion 61c, the first flexible printed circuit board 71 is located on the inner periphery side of the second flexible printed circuit board 72. In the second extended portion 61d (in the second extended portion 61d), the first flexible printed circuit board 71 is located in the -Z direction of the second flexible printed circuit board 72. In the first extension portion 62 and the second extension portion 63, the first flexible printed circuit board 71 is located in the -Z direction of the second flexible printed circuit board 72.

The first spacer 66 is therefore fixed between the second flexible printed circuit board 72 of the drawer portion 60 and the first flexible printed circuit board 71 of the first extension portion 61b. The second spacer 67 is fixed between the first flexible printed circuit board 71 of the first extension portion 61b and the second flexible printed circuit board 72 of the second extension portion 61d.

Here, as shown in FIG. 7, in this example in which the flexible printed circuit board 8 includes two flexible printed circuit boards 71 and 72, the width of the first spacer 66 in the Y-axis direction and the width of the second spacer 67 in the Y-axis direction are made wider than the width of the meandering portion 61 in the Y-axis direction in the flexible printed circuit board 8. As a result, both ends of the first spacer 66 in the Y-axis direction protrude from the meandering portion 61 in the Y-axis direction, and both ends of the second spacer 67 in the Y-axis direction protrude from the meandering portion 61 in the Y-axis direction. In addition, the protruding portion of the first spacer 66 protruding in the Y-axis direction from the meandering portion 61 and the protruding portion of the second spacer 67 protruding in the Y-axis direction from the meandering portion face each other in the Z direction, so that an adhesive is filled between them to form a first adhesive layer 75. The first adhesive layer 75 prevents the first spacer 66 and the second spacer 67 from being separated in the Z-axis direction.

A second adhesive layer 76 is provided on the first spacer 66, extending from the protruding portion protruding from the meandering portion 61 in the Y-axis direction to the first flexible printed circuit board 71 located in the -Z direction in the draw-out portion 60. The second adhesive layer 76 prevents the first flexible printed circuit board 71 from moving away from the second flexible printed circuit board 72 in the -Z direction in the draw-out portion 60. A third adhesive layer 77 is provided on the second spacer 67, extending from the protruding portion protruding from the meandering portion in the Y-axis direction to the first flexible printed circuit board 71 located in the +Z direction in the second extension portion 61d. The third adhesive layer 77 prevents the second flexible printed circuit board 72 from moving away from the first flexible printed circuit board 71 in the +Z direction in the second extension portion 61d.

(Action and Effect)
According to this example, the flexible printed circuit board 8 drawn out from the movable body 5 is routed with its thickness direction facing the Z-axis direction, and includes a first extension portion 62 and a second extension portion 63 extending in two different directions. Therefore, when the movable body 5 rotates around the X-axis and the Y-axis perpendicular to the Z-axis, the first extension portion 62 and the second extension portion 63 are more likely to bend than when the flexible printed circuit board 8 is routed with its thickness direction facing the direction perpendicular to the Z-axis.

In addition, the flexible printed circuit board 8 is pulled out in the X-axis direction from a position different from the swing center point P of the movable body 5 in the Z-axis direction, then meanders in the Z-axis direction to reach the XY plane including the X-axis and Y-axis, and then extends in the Y-axis and X-axis directions. As a result, the first extension portion 62 of the flexible printed circuit board 8 is pulled out in the Y-axis direction from a position close to the swing center point P in the Z-axis direction. Furthermore, since the second extension portion 63 of the flexible printed circuit board 8 is continuous with the first extension portion 62, it can be pulled around a position close to the swing center point P in the Z-axis direction. Here, if the first extension portion 62 and the second extension portion 63 are pulled around a position close to the swing center point P in the Z-axis direction, the flexible printed circuit board 8 is more likely to bend when the movable body 5 rotates around the X-axis and the Y-axis, compared to when they are pulled around a position away from the swing center point P in the Z-axis direction. Therefore, it is possible to suppress the rotation of the movable body 5 from being hindered by the flexible printed circuit board 8.

Furthermore, in this example, the flexible printed circuit board 8 meanders at the meandering portion 61 and is not bent at a specific angle. Therefore, when assembling the optical unit with shake correction function, there is no need to bend the flexible printed circuit board 8 at a specific angle. This makes it easier to assemble the optical unit with shake correction function.

In this example, the support 7 includes a frame 30 that surrounds the movable body 5 from the radial outside. The frame 30 includes a first frame portion 31 and a second frame portion 32 that face each other in the X-axis direction and extend parallel to the Y-axis direction, and a pair of third frame portions 33 and fourth frame portions 34 that face each other in the Y-axis direction and extend parallel to the X-axis direction. The drawer portion 60 is drawn out in the X-axis direction from the second frame portion 32. The first extension portion 62 extends in the Y-axis direction along the second frame portion 32. The second extension portion 63 extends in the X-axis direction along the fourth frame portion 34. This allows the flexible printed circuit board 8 to be routed in the vicinity of the support 7, making it easier to prevent the area occupied by the optical unit with shake correction function from increasing when viewed from the Z-axis direction.

In addition, in this example, the pull-out portion 60 is pulled out in the X-axis direction from a position in the second frame portion 32 that is closer to the third frame portion 33 in the Y-axis direction than the fourth frame portion 34. This allows the first extension portion 62 extending in the Y-axis direction along the second frame portion 32 to be provided longer, making it easier to deflect the flexible printed circuit board 8 when the movable body 5 rotates around the X-axis and the Y-axis.

Furthermore, a first spacer 66 is fixed between the first extension portion 61b, which faces the draw-out portion 60 in the Z-axis direction in the serpentine portion 61, and the draw-out portion 60. A second spacer 67 is fixed between the first extension portion 61b and the second extension portion 61d, which are adjacent to each other in the Z-axis direction in the serpentine portion 61. This makes it easy to maintain the shape of the serpentine portion 61 in the flexible printed circuit board 8.

In this example, the flexible printed circuit board 8 includes a first flexible printed circuit board 71 and a second flexible printed circuit board 72 that are pulled out from the movable body 5 while overlapping in the Z-axis direction. Therefore, compared to a case where a single wide flexible printed circuit board is pulled out from the movable body 5 and routed, the flexible printed circuit board 8 is more likely to bend when the movable body 5 rotates around the first axis R1 and the second axis R2.

Furthermore, if the flexible printed circuit board 8 is made to meander twice in the meandering section 61, the first flexible printed circuit board 71 is located outside the second flexible printed circuit board 72 in the first curved portion 61a of the meandering section 61, and the second flexible printed circuit board 72 is located outside the first flexible printed circuit board 71 in the second curved portion 61c. This makes it possible to suppress a difference between the first distance over which the first flexible printed circuit board 71 is routed and the second distance over which the second flexible printed circuit board is routed in the meandering section 61. Therefore, it is possible to prevent or suppress the formation of wrinkles in one of the two meandering flexible printed circuit boards 71, 72. Therefore, it is possible to prevent or suppress the flexible printed circuit board 8 from becoming difficult to bend due to wrinkles generated in one of the flexible printed circuit boards 71, 72.

(Modification)
When one flexible printed circuit board 8 is pulled out from the movable body 5, the meandering portion 61 may meander once or twice or more. FIG. 8 is a perspective view of an optical unit with shake correction function of a modified example. FIG. 9 is a cross-sectional view of the optical unit with shake correction function of a modified example cut along a plane including the optical axis and the X-axis. In the optical unit with shake correction function 1 of the modified example, one flexible printed circuit board 8A is pulled out from the movable body 5. In the optical unit with shake correction function of the modified example, the form of routing of the flexible printed circuit board 8 differs from that of the above example, but the other configurations are the same. Therefore, the same components are denoted by the same reference numerals, and the form of routing of the flexible printed circuit board 8A will be described.

As shown in FIG. 8, in the optical unit 1A with shake correction function of this example, the flexible printed circuit board 8A is also routed with its thickness direction facing the Z-axis direction. As shown in FIG. 9, the flexible printed circuit board 8 is pulled out in the +X direction from the end portion of the movable body 5 in the -Z direction, and has a pull-out portion 60 that extends to the radial outside of the frame body 30 through the cutout portion 32a of the frame body 30. As shown in FIG. 8, the pull-out portion 60 is pulled out in the +X direction from a position in the second frame portion 32 of the holder 16 closer to the third frame portion 33 than the fourth frame portion 34 in the Y-axis direction. The flexible printed circuit board 8A also has a meandering portion 61 that meanders once so as to overlap with the pull-out portion 60 when viewed from the Z-axis direction. The meandering portion 61 extends from the pull-out portion 60 in the Z-axis direction toward the swing center point P (+Z direction). Therefore, as shown in Figure 9, the meandering section 61 includes a first curved portion 61a that curves in the -X direction from the +X end of the pull-out section 60 toward the +Z direction, and a first extension portion 61b that extends in the -X direction from the end of the first curved portion 61a opposite the pull-out section 60 and faces the pull-out section 60. The first extension portion 61b is the final meandering portion of the meandering section 61 that is located on the opposite side of the pull-out section 60 in the Z-axis direction. As shown in Figure 9, the final meandering portion (second extension portion 61b) is located on the XY plane that includes the X-axis and Y-axis.

Furthermore, as shown in FIG. 8, the flexible printed circuit board 8A includes a first extension portion 62 extending in a first extension direction from the meandering portion 61 toward the tip, and a second extension portion 63 extending in a second extension direction different from the first extension direction. The first extension portion 62 is continuous with the +Y-direction edge of the final meandering portion (second extension portion 61b). The second extension portion 63 is continuous with the first extension portion 62. The first extension direction is the Y-axis direction. Therefore, the first extension portion 62 is extended along the second frame portion 32 at a position adjacent to the second frame portion 32 of the frame body 30. The second extension direction in which the second extension portion 63 extends is the -X direction. Therefore, the second extension portion 63 is extended along the fourth frame portion 34 of the frame body 30. A connector 9 is fixed to the tip of the second extension portion 63. Here, a first spacer 66 is fixed by adhesive between the first extension portion 61b of the serpentine portion 61, which faces the pull-out portion 60 in the Z-axis direction, and the pull-out portion 60.

In this example, the flexible printed circuit board 8A drawn out from the movable body 5 is drawn around with its thickness direction facing the Z-axis direction, and has a first extension part 62 and a second extension part 63 that extend in two different directions. Therefore, when the movable body 5 rotates around the X-axis and the Y-axis perpendicular to the Z-axis, the first extension part 62 and the second extension part 63 are more likely to bend than when the flexible printed circuit board 8A is drawn around with its thickness direction facing the direction perpendicular to the Z-axis. 0

Moreover, the flexible printed circuit board 8A is pulled out in the X-axis direction from a position in the Z-axis direction different from the oscillation center point P of the movable body 5, and then meanders in the Z-axis direction to reach an XY plane including the X-axis and Y-axis, and then extends in the Y-axis direction and the X-axis direction. As a result, the first extension portion 62 of the flexible printed circuit board 8A is pulled out in the Y-axis direction from a position close to the oscillation center point P in the Z-axis direction. Furthermore, the second extension portion 63 of the flexible printed circuit board 8A is continuous with the first extension portion 62, and therefore can be pulled around a position close to the oscillation center point P in the Z-axis direction. Therefore, the rotation of the movable body 5 can be prevented from being hindered by the flexible printed circuit board 8A.

1...Optical unit with shake correction function, 2...Lens, 3...Camera module, 5...Movable body, 6...Swing support mechanism, 7...Support body, 8, 8A...Flexible printed circuit board, 9...Connector, 10...Magnetic drive mechanism for shake correction, 11...First magnetic drive mechanism for shake correction, 12...Second magnetic drive mechanism for shake correction, 13...Flexible printed circuit board, 16...Holder, 17...Main body, 18 ...lens barrel portion, 19...imaging element, 21...first side wall, 22...second side wall, 23...third side wall, 24...fourth side wall, 25...fifth side wall, 26...sixth side wall, 27...seventh side wall, 28...eighth side wall, 30...frame body, 31...first frame portion, 32...second frame portion, 32a...notch portion, 33...third frame portion, 34...fourth frame portion, 35...first magnet, 36...second magnet, 37...first coil, 38...second coil 1. The gimbal frame includes a first connecting mechanism, a second connecting mechanism, and a second connecting mechanism. The first connecting mechanism includes a first gimbal frame main body, and a second connecting mechanism. The second connecting mechanism includes a second connecting mechanism and a second connecting mechanism. The second connecting mechanism includes a first connecting mechanism and a second connecting mechanism. The second connecting mechanism includes a first connecting mechanism and a second connecting mechanism. The second connecting mechanism includes a first connecting mechanism and a second connecting mechanism. 1 curved portion, 61b...first extension portion, 61c...second curved portion, 61d...second extension portion, 62...first extension portion, 63...second extension portion, 66...first spacer, 67...second spacer, 71...first flexible printed circuit board, 72...second flexible printed circuit board, 75...first adhesive layer, 76...second adhesive layer, 77...third adhesive layer, L...optical axis, R1...first axis, R2...second axis

Claims (7)

a movable body including a camera module;
A support;
an X-axis, a Y-axis, and a Z-axis are three mutually orthogonal axes, and when an optical axis of the camera module is aligned with the Z-axis, a swing support mechanism supports the movable body swingably about the X-axis relative to the support body and supports the movable body swingably about the Y-axis;
a swing drive mechanism for swinging the movable body about the X-axis and the Y-axis;
A flexible printed circuit board is drawn out from the movable body,
a swing center point of the movable body where the X-axis, the Y-axis, and the Z-axis intersect is located inside the movable body,
the flexible printed circuit board is routed with its thickness direction facing the Z-axis direction, and includes, in order from the movable body toward its tip, an extended portion extended in the X-axis direction from a position in the Z-axis direction different from the oscillation center point of the movable body, a meandering portion that meanders in the Z-axis direction one or more times toward the oscillation center point so as to overlap with the extended portion when viewed from the Z-axis direction, a first extension portion extending in a first extension direction different from the X-axis direction, and a second extension portion extending in a second extension direction different from the first extension direction,
The optical unit with shake correction function, wherein a final meandering portion where the first extension portion is continuous in the meandering portion overlaps an XY plane including the X-axis and the Y-axis. The support body includes a frame body that surrounds the movable body from the radially outer side,
2. The optical unit with shake correction function according to claim 1, wherein the first extension portion and the second extension portion are routed along the frame body on the radially outer side of the frame body. the frame body includes a first frame portion and a second frame portion opposed to each other in the X-axis direction and extending parallel to the Y-axis direction, and a pair of a third frame portion and a fourth frame portion opposed to each other in the Y-axis direction and extending parallel to the X-axis direction,
The drawn-out portion is drawn out from the second frame portion in the X-axis direction,
The first extension direction is the Y-axis direction,
The first extension portion extends along the second frame portion,
The second extension direction is the X-axis direction,
The optical unit with shake correction function according to claim 2 , wherein the second extension portion extends along the fourth frame portion. The optical unit with shake correction function described in claim 3, characterized in that the pull-out portion is pulled out in the X-axis direction from a position in the second frame portion that is closer to the third frame portion in the Y-axis direction than the fourth frame portion. An optical unit with shake correction function according to any one of claims 1 to 4, characterized in that when the serpentine section serpentines once, a spacer is fixed between the serpentine section facing the pull-out section in the Z-axis direction and the pull-out section. The optical unit with shake correction function according to any one of claims 1 to 4, characterized in that when the serpentine section serpentines multiple times, a first spacer is fixed between the pull-out section and a serpentine portion of the serpentine section that faces the pull-out section in the Z-axis direction, and a second spacer is fixed between two adjacent serpentine portions of the serpentine section in the Z-axis direction. The flexible printed circuit board includes a first flexible printed circuit board and a second flexible printed circuit board that are pulled out from the movable body while being stacked in the Z-axis direction,
7. The optical unit with shake correction function according to claim 6, wherein the meandering portion meanders twice.

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