Optical unit with image stabilization function

Abstract

To provide an optical unit with a shake correction function which can suppress the obstruction of the movement of a movable body by a flexible printed board drawn from the movable body.SOLUTION: A movable body 5 of an optical unit 1 with a shake correction function is orthogonal to an optical axis L and oscillates around an X axis and a Y axis orthogonal to each other. A flexible printed board 8 drawn from the movable body 5 meanders in the Z-axis direction after being drawn in the X-axis direction from a position different from an oscillation center point P of the movable body 5 in the Z-axis direction, reaches an XY plane including the X axis and Y axis and then extends in the Y-axis direction and X-axis direction. The flexible printed board 8 is routed in a state where the thickness direction is oriented to the Z-axis direction.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an optical unit with a shake correction function that rotates a camera module around two axes orthogonal to the optical axis to perform shake correction.

Background Art

[0002] Among optical units mounted on mobile terminals and moving bodies, there are those that rotate a movable body on which a camera module is mounted around a predetermined axis in order to suppress blurring of a photographed image when the mobile terminal or moving body moves. Patent Document 1 describes an optical unit with this type of shake correction function.

[0003] The shake correction function-equipped optical unit of this 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 with respect 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 drawn out from the movable body. The flexible printed circuit board is drawn out from the movable body with the thickness direction oriented in the optical axis direction, and then bent 90° in the optical axis direction. Thereafter, the flexible printed circuit board is oriented with the thickness direction in a direction orthogonal to the optical axis and routed in an L shape along the outer peripheral wall of the movable body. Further, the flexible printed circuit board is bent 90° from the tip portion of the L shape toward the outer peripheral side and fixed to the fixed body. Reinforcement plates for maintaining the bent shape are fixed to the two bent portions of the flexible printed circuit board, respectively. When the movable body rotates around the optical axis for shake correction, the flexible printed circuit board flexes between the movable body and the fixed body.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

[0005] Some optical units with shake correction functions correct shake by rotating a movable body around a first axis perpendicular to the optical axis, and around a second axis perpendicular to both the optical axis and the first axis. When such an optical unit with shake correction functions uses the flexible printed circuit board described in Reference 1, the portion of the circuit board that is routed with its thickness direction perpendicular to the optical axis does not flex easily when the movable body rotates around the first and second axes, increasing the load required to oscillate the movable body.

[0006] In view of these points, the object of the present invention is to provide an optical unit with a vibration correction function that can suppress the obstruction of the rotation of a movable body that rotates around two axes perpendicular to the optical axis by a flexible printed circuit board. [Means for solving the problem]

[0007] To solve the above problems, the optical unit with shake correction function of the present invention comprises a movable body equipped with a camera module, a support body, a swing support mechanism that supports the movable body so as to be able to swing around the X axis and the Y axis when the optical axis of the camera module is aligned with the Z axis, with the three mutually orthogonal axes being the X axis, Y axis and Z axis, a swing drive mechanism that swings the movable body around the X axis and the Y axis, and a flexible printed circuit board that is pulled out from the movable body, wherein the center of the swing of the movable body where the X axis, the Y axis and the Z axis intersect is within the movable body Located on the side, the flexible printed circuit board is routed with its thickness direction oriented in the Z-axis direction, and sequentially from the movable body toward the tip, it comprises: a pull-out portion that is pulled out in the X-axis direction from a position in the Z-axis direction different from the pivot center point of the movable body; a meandering portion that meanders once or multiple times in the Z-axis direction toward the pivot center point so as to overlap with the pull-out portion when viewed from the Z-axis direction; a first extension portion that extends in a first extension direction different from the X-axis direction from the final meandering portion located on the opposite side of the pull-out portion in the Z-axis direction of the meandering portion; and a second extension portion that extends in a second extension direction different from the first extension direction from the end portion of the first extension portion opposite to the final meandering portion, wherein the final meandering portion coincides with the XY plane including the X-axis and the Y-axis.

[0008] According to the present invention, the flexible printed circuit board pulled out from the movable body is routed with its thickness direction oriented in the Z-axis direction and comprises 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 Y-axis perpendicular to the Z-axis, the first and second extension portions are more flexible compared to when the flexible printed circuit board is routed with its thickness direction oriented in a direction perpendicular to the Z-axis. Furthermore, the flexible printed circuit board is pulled out in the X-axis direction from a position different from the pivot center point of the movable body in the Z-axis direction, then meanders in the Z-axis direction to reach the XY plane including the X and Y axes, and thereafter extends in the first extension direction and the second extension direction. As a result, the first extension portion is pulled out in the first extension direction from a position close to the pivot center point in the Z-axis direction. Also, since the second extension portion is continuous with the first extension portion, it can be routed at a position close to the pivot center point in the Z-axis direction. Here, if the first and second extensions, which extend in two directions, are routed in the Z-axis direction at a position close to the rotation center, the flexible printed circuit board will be more flexible when the movable body rotates around the X and Y axes compared to when they are routed at a position further away from the rotation center in the Z-axis direction. Therefore, the rotation of the movable body can be suppressed from being hindered by the flexible printed circuit board. Furthermore, in this invention, the flexible printed circuit board meanders in the meandering section 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 predetermined angle. Therefore, the assembly of the optical unit with shake correction function becomes easier.

[0009] In the present invention, the support body may include a frame that surrounds the movable body from the radially outer side, and the first extension and the second extension may be routed along the frame on the radially outer side of the frame. In this way, the flexible printed circuit board can be routed in the vicinity of the support body, making it easier to suppress an increase in the occupied area of ​​the optical unit with vibration correction function when viewed from the Z-axis direction.

[0010] In this case, the frame comprises 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 third frame portions and a fourth frame portion that face each other in the Y-axis direction and extend parallel to the X-axis direction, and the extension portion extends 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.

[0011] Furthermore, in this case, it is desirable that the pull-out portion is pulled out in the X-axis direction from a position in the second frame that is closer to the third frame than to the fourth frame in the Y-axis direction. This allows for a longer first extension portion that extends in the Y-axis direction along the second frame, making it easier to flex the flexible printed circuit board when the movable body rotates around the X-axis and Y-axis.

[0012] In the present invention, when the meandering portion meanders once, a spacer is fixed between the meandering portion of the meandering portion that faces the pull-out portion in the Z-axis direction and the pull-out portion. This can be assumed. In this way, it becomes easier to maintain the shape of the meandering portion that meanders in the Z direction on the flexible printed circuit board.

[0013] In the present invention, when the meandering portion meanders multiple times, a first spacer can be fixed between the meandering portion facing the pull-out portion in the Z-axis direction and the pull-out portion, and a second spacer can be fixed between two adjacent meandering portions in the Z-axis direction. This makes it easier to maintain the shape of the meandering portion that meanders in the Z direction on the flexible printed circuit board.

[0014] In the present invention, the flexible printed circuit board comprises a first flexible printed circuit board and a second flexible printed circuit board, which are pulled out from the movable body in a stacked state in the Z-axis direction, and it is desirable that the meandering section meanders twice. In this way, compared to the case in which a single wide flexible printed circuit board is pulled out from the movable body and moved around, the flexible printed circuit board becomes more flexible when the movable body rotates around the first axis and the second axis. Furthermore, by making the flexible printed circuit board meander twice in the meandering section, it is possible to suppress the difference between the first distance over which the first flexible printed circuit board is moved and the second distance over which the second flexible printed circuit board is moved in the meandering section. Therefore, it is possible to prevent or suppress the formation of wrinkles on one of the two meandering flexible printed circuit boards. Thus, it is possible to prevent or suppress the reduction in flexibility of the flexible printed circuit board due to wrinkles that have formed on one of the flexible printed circuit boards. [Effects of the Invention]

[0015] According to the present invention, the flexible printed circuit board connected to the movable body is routed with its thickness direction oriented in the Z-axis direction and comprises 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 pivot center point in the Z-axis direction. Furthermore, since the second extension portion is continuous with the first extension portion, it can be routed at a position close to the pivot center point in the Z-axis direction. Therefore, when the movable body rotates around the X-axis and Y-axis, the first extension portion and the second extension portion are easily deflected. Thus, the rotation of the movable body can be prevented from being hindered by the flexible printed circuit board. [Brief explanation of the drawing]

[0016] [Figure 1] This is a perspective view of an optical unit with image stabilization. [Figure 2] This is a plan view of an optical unit with image stabilization. [Figure 3] This is an exploded perspective view of an optical unit with image stabilization. [Figure 4]It is a sectional view taken along line A-A in FIG. 2. [Figure 5] It is a sectional view taken along line B-B in FIG. 2. [Figure 6] It is a sectional view taken along line C-C in FIG. 2. [Figure 7] It is an explanatory view of a flexible printed board. [Figure 8] It is a perspective view of an optical unit with a shake correction function of a modified example. [Figure 9] It is a sectional view of an optical unit with a shake correction function of a modified example.

Embodiments for Carrying out the Invention

[0017] Hereinafter, embodiments of an optical unit with a shake correction function to which the present invention is applied will be described with reference to the drawings.

[0018] (Overall Configuration) FIG. 1 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. 3 is an exploded perspective view of an optical unit with a shake correction function. FIG. 4 is a sectional view taken along line A-A in FIG. 2. FIG. 5 is a sectional view taken along line B-B in FIG. 2. FIG. 6 is a sectional view taken along line C-C in FIG. 2.

[0019] As shown in FIG. 1, an optical unit 1 with a shake correction function has a camera module 3 including a lens 2. The optical unit 1 with a shake correction function is used, for example, in optical devices such as a mobile phone with a camera, a drive recorder, etc., and in optical devices such as an action camera and a wearable camera mounted on a moving body such as a helmet, a bicycle, and a radio control helicopter. In such an optical device, when the optical device shakes during shooting, the captured image is distorted. The optical unit 1 with a shake correction function corrects the inclination of the camera module 3 based on the acceleration, angular velocity, shake amount, etc. detected by a detection means such as a gyroscope in order to avoid the captured image from tilting.

[0020] The optical unit 1 with image stabilization function performs image stabilization by rotating the camera module 3 around a first axis R1 perpendicular to its optical axis L, and around a second axis R2 perpendicular to both the optical axis L and the first axis R1. In this way, the optical unit 1 with image stabilization function performs pitch correction and yawing correction.

[0021] In the following, we will describe the optical unit with shake correction function assuming that the three mutually orthogonal axes are the X-axis, Y-axis, and Z-axis, and the optical axis L of the camera module 3 is aligned with the Z-axis. The directions along the X-axis, Y-axis, and Z-axis will be referred to as the X-axis direction, Y-axis direction, and Z-axis direction. One side of the X-axis direction will be the -X direction, and the other side will be the +X direction. One side of the Y-axis direction will be the -Y direction, and the other side will be the +Y direction. One side of the Z-axis direction will be the -Z direction, and the other side will be 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 tilted at 45 degrees with respect to the X-axis and Y-axis around the Z-axis (around the optical axis L).

[0022] As shown in Figures 1 and 2, the optical unit 1 with shake correction function includes a movable body 5 equipped with a camera module 3, a rocking support mechanism 6 that supports the movable body 5 so that it can rotate around a first axis R1 and a second axis R2, and a support body 7 that supports the movable body 5 via the rocking support mechanism 6. The support body 7 supports the movable body 5 so that it can rock around the first axis R1 and the second axis R2 via the rocking support mechanism 6.

[0023] Furthermore, the optical unit 1 with shake correction function includes a flexible printed circuit board 8 that is drawn out from the movable body 5 to the outside of the support 7. The flexible printed circuit board 8 is drawn out from the movable body 5 in the +X direction, meanders in the +Z axis direction, 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 circuit 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 fixed.

[0024] Furthermore, as shown in Figure 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 a first axis R1 and a second axis R2. The shake correction magnetic drive mechanism 10 comprises a first shake correction magnetic drive mechanism 11 that generates a driving force around the X axis for the movable body 5, and a second shake correction magnetic drive mechanism 12 that generates a driving force around the Y axis for the movable body 5. The first shake correction magnetic drive mechanism 11 is positioned in the +Y direction of the movable body 5. The second shake correction magnetic drive mechanism 12 is positioned 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 routed along the outer surface of the support 7 and then pulled out in the +Y direction.

[0025] Here, as shown in Figure 1, the movable body 5 rotates in the yaw direction around the X axis and the pitch direction around the Y axis by combining rotation around the first axis R1 and rotation around the second axis R2.

[0026] (movable body) As shown in Figure 3, the movable body 5 comprises a camera module 3 and a holder 16 that surrounds the camera module 3 from the outer periphery. The camera module 3 comprises a main body 17 with a roughly rectangular parallelepiped shape and a lens barrel 18 that protrudes from the center of the main body 17 in the +Z direction. The lens barrel 18 houses a lens 2. An image sensor 19 is housed at the -Z end portion of the main body 17. A flexible printed circuit board 8 is drawn out from the -Z end portion of the main body 17. The flexible printed circuit board 8 is electrically connected to the image sensor 19.

[0027] The holder 16 is made of resin. The holder 16 surrounds the main body 17 of the camera module 3 from the radially outer side. The lens barrel 18 of the camera module 3 protrudes in the +Z direction from the holder 16. The holder 16 has a first side wall 21 and a second side wall 22 extending parallel to the Y axis, and a third side wall 23 and a fourth side wall 24 extending parallel to the X axis. 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 opposite each other in the direction of the first axis R1, and a seventh side wall 27 and an eighth side wall 28 located diagonally opposite each other in the direction of the second axis R2. 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.

[0028] 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 is pulled out from the movable body 5 in the +X direction by passing through a notch 22a (see Figure 6) provided at the -Z end of the second side wall 22.

[0029] (Support) As shown in Figure 3, the support body 7 comprises a rectangular frame 30 that surrounds the holder 16 of the movable body 5 from the radially outer side, and a bottom plate 39 that seals the opening of the frame 30 in the -Z direction. The frame 30 comprises 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.

[0030] The first frame portion 31 is provided with a second coil holding hole 31a (see Figure 7) that penetrates in the X-axis direction. The second coil 38 is held in the second coil holding hole. The fourth frame portion 34 is provided with a first coil holding hole (not shown) that penetrates in the Y-axis direction. The first coil 37 is held in the first coil holding hole. The first coil 37 and the second coil 38 are both oval-shaped air-core coils that are elongated 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 30.

[0031] As shown in Figures 3 and 6, the second frame portion 32 is provided with a notch 32a. The flexible printed circuit board 8, pulled out from the movable body 5, is pulled out in the +X direction of the frame portion 30 through the notch 32a.

[0032] (Oscillating support mechanism) As shown in Figure 2, the rocking support mechanism 6 consists of a gimbal frame 40 and a gimbal frame 4 The swing support mechanism 6 includes a first connection mechanism 41 that connects the 0 and the support 7 so that they can rotate around a first axis R1, and a second connection mechanism 42 that connects the gimbal frame 40 and the movable body 5 so that they can rotate around a second axis R2. The swing support mechanism 6 connects the movable body 5 and the support 7 on the inner circumference side of the frame 30.

[0033] The gimbal frame 40 is made of a metal leaf spring. The gimbal frame 40 includes a gimbal frame main body 45 having an opening 45a through which the lens barrel portion 18 of the movable body 5 passes in the Z-axis direction. As shown in Figure 3, the gimbal frame 40 also includes a pair of first gimbal frame extensions 46 that protrude from the gimbal frame main body 45 toward both sides in the direction of the first axis R1 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 direction of the second axis R2 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 Figures 4 and 5, the pair of first gimbal frame extensions 46 and the pair of second gimbal frame extensions 47 are located on the outer circumference side of the holder 16. Furthermore, the pair of first gimbal frame extensions 46 and the pair of second gimbal frame extensions 47 are located on the inner circumference side of the frame 30.

[0034] As shown in Figure 4, the first connection mechanism 41 includes a first sphere 51 fixed to the -Z end portions of a pair of first gimbal frame extensions 46 of the gimbal frame 40 and projecting radially outward on the first axis R1, and a first metal receiving member 52 fixed to the inner corner between the first frame portion 31 and the third frame portion 33 of the frame body 30 and the inner corner between the third frame portion 33 and the fourth frame portion 34 of the frame body 30, respectively. Each first receiving member 52 has a first concave curved surface 52a recessed radially outward on the first axis R1. As shown in Figure 5, the second connection mechanism 42 includes a second sphere 53 fixed to the -Z end portions of a pair of second gimbal frame extensions 47 of the gimbal frame 40 and projecting radially inward on the second axis R2, and a second receiving member 54 fixed to the outer surface of the fifth side wall 25 and the outer surface of the sixth side wall 26 of the holder 16, respectively. Each second receiving member 54 is provided with a second concave curved surface 54a that is recessed radially inward on the second axis R2.

[0035] When the movable body 5 is supported by the support body 7 via the rocking support mechanism 6, as shown in Figure 4, the gimbal frame 40 is inserted inside a pair of first receiving members 52 arranged on the first axis R1, and the first sphere 51 is made point contact with the first concave curved surface 52a on the first axis R1. This constitutes the first connection mechanism 41, so that the gimbal frame 40 can rock around the first axis R1 relative to the support body 7. Also, when the movable body 5 is supported by the support body 7 via the rocking support mechanism 6, as shown in Figure 5, a pair of second gimbal frame extensions 47 of the gimbal frame 40 are positioned outside a pair of second receiving members 54 arranged on the second axis R2, so that the second sphere 53 is made point contact with the second concave curved surface 54a on the second axis R2. This constitutes the second connection mechanism 42, so that the gimbal frame 40 can rock around the second axis R2 relative to the support body 7. Therefore, the rocking support mechanism 6 connects the movable body 5 to the support body 7 in a state that allows it to rotate around the first axis R1 and around the second axis.

[0036] Here, as shown in Figures 4, 5, and 6, the pivot point P of the movable body 5 as it rotates around the X and Y axes is the intersection of the optical axis L, the first axis R1, and the second axis R2. Furthermore, the pivot point P is the intersection of the Z axis, the Y axis, and the Z axis. The pivot point P is located inside the movable body 5.

[0037] (Magnetic drive mechanism for vibration correction) When the movable body 5 is supported by the support body 7 via the swing support mechanism 6, as shown in Figure 6, the second magnet 36 fixed to the first side wall 21 of the holder 16 and the second coil 38 of the support body 7 face each other with a gap in the X-axis direction. The second magnet 36 and the second coil 38 are This constitutes the second vibration correction magnetic drive mechanism 12. Also, as can be seen from Figure 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 in the Y-axis direction. The first magnet 35 and the first coil 37 constitute the first vibration correction magnetic drive mechanism 11.

[0038] In the vibration compensation magnetic drive mechanism 10, power is supplied to the first coil 37 to rotate the movable body 5 around the X axis. Power is also supplied to the second coil 38 to rotate the movable body around the Y axis. The vibration compensation magnetic drive mechanism 10 combines the rotation of the movable body 5 around the X axis by the first vibration compensation magnetic drive mechanism 11 and the rotation of the movable body 5 around the Y axis by the second vibration compensation magnetic drive mechanism 12 to rotate the movable body 5 around the first axis R1 and the second axis R2.

[0039] (Flexible printed circuit board) Figure 7 is an explanatory diagram of a flexible printed circuit board. As shown in Figure 1, the flexible printed circuit board 8, pulled out from the movable body 5, is routed with its thickness direction oriented in the Z-axis direction. As shown in Figure 6, the flexible printed circuit board 8 has a pull-out portion 60 that is pulled out in the +X direction from the -Z end portion of the movable body 5 and extends radially outward from the frame 30 through the notch portion 32a of the frame 30. As shown in Figure 2, in this example, the pull-out portion 60 is pulled out in the +X direction from the -Y side of the -Z end portion of the camera module 3. Therefore, in the second frame portion 32, the pull-out portion 60 is pulled out in the +X direction from a position closer to the third frame portion 33 than to the fourth frame portion 34 in the Y-axis direction.

[0040] Furthermore, the flexible printed circuit board 8 includes a meandering portion 61 that meanders 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 toward the side of the pivot center point P (+Z direction) in the Z-axis direction. In this example, as shown in Figures 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 toward the +Z direction from the +X end of the pull-out portion 60, a first extended portion 61b that extends in the -X direction from the end of the first curved portion 61a opposite to the pull-out portion 60 and faces the pull-out portion 60, a second curved portion 61c that curves in the +X direction toward the +Z direction from the -X end of the first extended portion 61b, and a second extended portion 61d that extends in the +X direction from the end of the second curved portion 61c opposite to the first extended portion 61b and faces the first extended portion 61b. The second extension portion 61d is the final meandering portion of the meandering section 61, located on the opposite side of the extension portion 60 in the Z-axis direction. As shown in Figure 6, the final meandering portion (second extension portion 61d) is located on the XY plane, which includes the X and Y axes.

[0041] 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 is continuous with the final meandering portion (second extension portion 61d). The second extension portion 63 is continuous with the first extension portion 62. In this example, the first extension direction is the Y-axis direction. Therefore, as shown in Figure 2, the first extension portion 62 extends along the second frame portion 32 of the frame 30. The second extension direction to 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 30. A connector 9 is fixed to the tip of the second extension portion 63. The second extension 63 is connected via a connector 9 to a circuit board (not shown) of an optical device on which the optical unit 1 with shake correction function is mounted.

[0042] Here, as shown in Figures 6 and 7, a first spacer 66 is fixed between the extension portion 60 and the first extended portion 61b of the meandering portion 61. In addition, a second spacer 67 is fixed between the first extended portion 61b and the second extended portion 61d that are adjacent in the Z-axis direction in the meandering portion 61. The first spacer 66 and the second spacer 67 are made of the same material. Therefore, the thickness dimension of the first spacer 66 in the Z-axis direction and the thickness dimension of the second spacer 67 in the Z-axis direction are the same. Thus, the spacing of the meanders in the meandering portion 61 is the same.

[0043] In this example, the flexible printed circuit board 8 comprises a first flexible printed circuit board 71 and a second flexible printed circuit board 72, which are superimposed in the Z-axis direction and pulled out in the +X direction from the camera module 3. The first flexible printed circuit board 71 is located in the -Z direction of the second flexible printed circuit board 72 at the position where it is pulled out from the camera module 3. Therefore, at the pull-out portion 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 circumference 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 circumference 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 section 62 and the second extension section 63, the first flexible printed circuit board 71 is located in the -Z direction relative to the second flexible printed circuit board 72.

[0044] Therefore, the first spacer 66 is fixed between the second flexible printed circuit board 72 of the pull-out 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.

[0045] In this example, as shown in Figure 7, the flexible printed circuit board 8 comprises two flexible printed circuit boards 71 ​​and 72. The Y-axis width of the first spacer 66 and the Y-axis width of the second spacer 67 are made wider than the Y-axis width of the meandering portion 61 on the flexible printed circuit board 8. This causes both ends of the first spacer 66 in the Y-axis direction to protrude from the meandering portion 61, and both ends of the second spacer 67 in the Y-axis direction to protrude from the meandering portion 61. Furthermore, the protruding portions of the first spacer 66 and the protruding portions of the second spacer 67 that protrude from the meandering portion in the Y-axis direction face each other in the Z-direction. Therefore, 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 separating in the Z-axis direction.

[0046] Furthermore, a second adhesive layer 76 is provided in the first spacer 66, extending from a protruding portion that protrudes in the Y-axis direction from the meandering portion 61 to the first flexible printed circuit board 71 located in the -Z direction in the pull-out portion 60. The second adhesive layer 76 prevents the first flexible printed circuit board 71 from separating from the second flexible printed circuit board 72 in the -Z direction in the pull-out portion 60. In addition, a third adhesive layer 77 is provided in the second spacer 67, extending from a protruding portion that protrudes in the Y-axis direction from the meandering portion to the first flexible printed circuit board 71 located in the +Z direction in the second extended portion 61d. The third adhesive layer 77 prevents the second flexible printed circuit board 72 from separating from the first flexible printed circuit board 71 in the +Z direction in the second extended portion 61d.

[0047] (Effects and Benefits) In this example, the flexible printed circuit board 8, pulled out from the movable body 5, is routed with its thickness direction oriented in 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 Y-axis perpendicular to the Z-axis, the first extension portion 62 and the second extension portion 63 are more prone to bending compared to when the flexible printed circuit board 8 is routed with its thickness direction oriented perpendicular to the Z-axis.

[0048] Furthermore, the flexible printed circuit board 8 is drawn out in the X-axis direction from a position different from the pivot 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 and Y axes, and then extends in the Y and X-axis directions. As a result, the first extension portion 62 of the flexible printed circuit board 8 is drawn out in the Y-axis direction from a position close to the pivot center point P in the Z-axis direction. In addition, since the second extension portion 63 of the flexible printed circuit board 8 is continuous with the first extension portion 62, it can be routed in a position close to the pivot center point P in the Z-axis direction. Here, if the first extension portion 62 and the second extension portion 63 are routed in a position close to the pivot center point P in the Z-axis direction, the flexible printed circuit board 8 will be more likely to flex when the movable body 5 rotates around the X and Y axes compared to when they are routed in a position further away from the pivot center point P in the Z-axis direction. Therefore, the rotation of the movable body 5 can be suppressed from being hindered by the flexible printed circuit board 8.

[0049] Furthermore, in this example, the flexible printed circuit board 8 meanders in the meandering section 61 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 8 at a predetermined angle. Consequently, the assembly of the optical unit with shake correction function becomes easier.

[0050] In this example, the support body 7 includes a frame 30 that surrounds the movable body 5 from the radially outer side. 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 a fourth frame portion 34 that face each other in the Y-axis direction and extend parallel to the X-axis direction. The pull-out portion 60 is pulled out from the second frame portion 32 in the X-axis direction. The first extension portion 62 extends along the second frame portion 32 in the Y-axis direction. The second extension portion 63 extends along the fourth frame portion 34 in the X-axis direction. This allows the flexible printed circuit board 8 to be routed in the vicinity of the support body 7, making it easier to suppress an increase in the occupied area of ​​the optical unit with vibration correction function when viewed from the Z-axis direction.

[0051] Furthermore, 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 than to the fourth frame portion 34 in the Y-axis direction. This allows for a longer first extension portion 62 that extends in the Y-axis direction along the second frame portion 32, making it easier to flex the flexible printed circuit board 8 when the movable body 5 rotates around the X-axis and Y-axis.

[0052] Furthermore, a first spacer 66 is fixed between the first extension portion 61b, which faces the extension portion 60 in the Z-axis direction in the meandering portion 61, and the extension portion 60. Also, a second spacer 67 is fixed between the first extension portion 61b and the second extension portion 61d, which are adjacent in the Z-axis direction in the meandering portion 61. Therefore, it becomes easy to maintain the shape of the meandering portion 61 in the flexible printed circuit board 8.

[0053] In this example, the flexible printed circuit board 8 comprises a first flexible printed circuit board 71 and a second flexible printed circuit board 72 that are pulled out from the movable body 5 in a stacked state in the Z-axis direction. Therefore, compared to the case where a single wide flexible printed circuit board is pulled out from the movable body 5 and moved around, 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.

[0054] 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 will be 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 will be 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 wrinkles from forming on one of the two meandering flexible printed circuit boards 71 ​​and 72. This can be suppressed. Therefore, it is possible to prevent or suppress the problem of the flexible printed circuit board 8 becoming less flexible due to wrinkles generated on one of the flexible printed circuit boards 71 ​​and 72.

[0055] (modified version) When a single flexible printed circuit board 8 is drawn out from the movable body 5, the meandering of the meandering section 61 may occur once or two or more times. Figure 8 is a perspective view of a modified optical unit with vibration correction function. Figure 9 is a cross-sectional view of the modified optical unit with vibration correction function cut in a plane including the optical axis and the X axis. In the modified optical unit with vibration correction function 1, a single flexible printed circuit board 8A is drawn out from the movable body 5. Although the routing of the flexible printed circuit board 8 in the modified optical unit with vibration correction function differs from the above example, the other components are the same. Therefore, the same reference numerals are used to describe the routing of the flexible printed circuit board 8A.

[0056] As shown in Figure 8, in the optical unit 1A with vibration correction function of this example, the flexible printed circuit board 8A is routed with its thickness direction oriented in the Z-axis direction. As shown in Figure 9, the flexible printed circuit board 8 is pulled out in the +X direction from the -Z end portion of the movable body 5 and has a pull-out portion 60 that extends radially outward from the frame 30 through the notch portion 32a of the frame 30. As shown in Figure 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 that is closer to the third frame portion 33 than to 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 is directed from the pull-out portion 60 toward the side of the pivot center point P (+Z direction) in the Z-axis direction. Accordingly, as shown in Figure 9, the meandering section 61 comprises a first curved portion 61a that curves in the -X direction toward the +Z direction from the +X end of the pull-out section 60, and a first extended portion 61b that extends in the -X direction from the end of the first curved portion 61a opposite to the pull-out section 60 and faces the pull-out section 60. The first extended portion 61b is the final meandering section of the meandering section 61 located on the opposite side of the pull-out section 60 in the Z-axis direction. As shown in Figure 9, the final meandering section (second extended portion 61b) is located on the XY plane, which includes the X and Y axes.

[0057] Furthermore, as shown in Figure 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 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 extends along the second frame portion 32 of the frame 30 at a position adjacent to the second frame portion 32 of the frame 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 30. A connector 9 is fixed to the tip of the second extension portion 63. Here, a first spacer 66 is fixed between the first extended portion 61b, which faces the extension portion 60 in the Z-axis direction in the meandering portion 61, and the extension portion 60 with adhesive.

[0058] In this example as well, the flexible printed circuit board 8A pulled out from the movable body 5 is routed with its thickness direction oriented in 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 Y-axis perpendicular to the Z-axis, the first extension portion 62 and the second extension portion 63 are more prone to bending compared to when the flexible printed circuit board 8A is routed with its thickness direction oriented in a direction perpendicular to the Z-axis.

[0059] Furthermore, the flexible printed circuit board 8A is pulled out in the X-axis direction from a position different from the pivot 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 and Y axes, and thereafter extends in the Y-axis and X-axis directions. 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 pivot center point P in the Z-axis direction. Furthermore, since the second extension portion 63 of the flexible printed circuit board 8A is continuous with the first extension portion 62, it can be pulled around a position close to the pivot 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. [Explanation of Symbols]

[0060] 1…Optical unit with image stabilization 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 image stabilization, 11…First magnetic drive mechanism for image stabilization, 12…Second magnetic drive mechanism for image stabilization, 13…Flexible printed circuit board, 16…Holder, 17…Main body, 18 ...lens barrel, 19...image sensor, 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, 31...first frame section, 32...second frame section, 32a...notch section, 33...third frame section, 34...fourth frame section, 35...first magnet, 36...second magnet, 37...first coil, 38...second coil 40...Gimbal frame, 41...First connection mechanism, 42...Second connection mechanism, 45...Gimbal frame main body, 45a...Opening, 46...First gimbal frame extension, 47...Second gimbal frame extension, 51...First sphere, 52...First receiving member...First concave curved surface, 53...Second sphere, 54...Second receiving member...Second concave curved surface, 60...Pull-out part, 61...Meandering part, 61a...First 1. Curved section, 61b…First extension section, 61c…Second curved section, 61d…Second extension section, 62…First extension section, 63…Second extension section, 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

1. a movable body having 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 also swings about the Y-axis; a swing drive mechanism that swings the movable body around the X axis and the Y axis; a flexible printed circuit board 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 this order from the movable body toward its tip, a drawn-out portion that is drawn in the X-axis direction from a position in the Z-axis direction that is different from the oscillation center point of the movable body, a meandering portion that meanders one or more times in the Z-axis direction toward the oscillation center point so as to overlap with the drawn-out portion when viewed from the Z-axis direction, a first extending portion that extends in a first extending direction that is different from the X-axis direction, and a second extending portion that extends in a second extending direction that is different from the first extending direction, The optical unit with shake correction function is characterized in that a final meandering portion of the meandering portion, where the first extension portion is continuous, overlaps with an XY plane including the X axis and the Y axis.

2. 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.

3. 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 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, 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, 3. The optical unit with shake correction function according to claim 2, wherein the second extension portion extends along the fourth frame portion.

4. 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.

5. 5. An optical unit with shake correction function according to claim 1, characterized in that when the serpentine portion meanders once, a spacer is fixed between the serpentine portion of the serpentine portion that faces the draw-out portion in the Z-axis direction and the draw-out portion.

6. 5. An optical unit with shake correction function according to claim 1, characterized in that, when the serpentine section serpentines multiple times, a first spacer is fixed between the draw-out section and a serpentine section in the Z-axis direction that faces the draw-out section, and a second spacer is fixed between two adjacent serpentine sections in the Z-axis direction.

7. The flexible printed circuit boards include 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. Preparation, 7. The optical unit with shake correction function according to claim 6, wherein the meandering portion meanders twice.

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