Optical unit with shake correction function

Abstract

Provided is an optical unit with a shake correction function that can suppress a flexible printed board drawn from a movable body from interfering with the operation of the movable body. The movable body (10) of the optical unit with a shake correction function (1) swings around the X-axis and the Y-axis that are orthogonal to the optical axis (L) and to each other. The flexible printed board (8) drawn from the movable body (5) is drawn 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, is bent in the Z-axis direction, reaches the XY plane including the X-axis and the Y-axis, and then extends in the Y-axis direction and the X-axis direction. The flexible printed board (8) is drawn in a state in which the thickness direction faces the Z-axis direction.

Description

Technical Field

[0001] This invention relates to an optical unit with shake correction function, which rotates a camera module about two axes orthogonal to the optical axis to perform shake correction. Background Technology

[0002] In optical units installed in portable terminals or mobile devices, to suppress image distortion during movement of the portable terminal or mobile device, there exists an optical unit that rotates a movable body equipped with a camera module around a predetermined axis. Such an optical unit with shake correction function is described in Patent Document 1.

[0003] The optical unit with jitter correction function described in this document includes: a movable body with a camera module; a fixed body; a support mechanism that supports the movable body so that it can rotate about an optical axis relative to the fixed body; and a magnetic drive mechanism that causes the movable body to rotate about an optical axis. A flexible printed circuit board (FPCB) connected to the camera module is led out from the movable body. After the FPCB is led out from the movable body with its thickness direction facing the optical axis, it is bent 90° in the optical axis direction. Then, the FPCB is wound in an L-shape along the outer peripheral wall of the movable body with its thickness direction facing a direction orthogonal to the optical axis. Moreover, the FPCB is bent 90° from the front end of the L-shape towards the outer periphery and fixed to the fixed body. Reinforcing plates for maintaining the bent shape are fixed to the two bent portions formed by bending the FPCB. When the movable body rotates about an optical axis for jitter correction, the FPCB flexes between the movable body and the fixed body.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2020-27134 Summary of the Invention

[0007] In an optical unit with jitter correction function, there is an optical unit that performs jitter correction by rotating a movable body around a first axis orthogonal to the optical axis and around a second axis orthogonal to both the optical axis and the first axis. When such an optical unit with jitter correction function uses the flexible printed circuit board described in Patent Document 1, when the movable body rotates around the first axis and the second axis, the portion wound in a state where the thickness direction is orthogonal to the optical axis is less likely to bend, thereby increasing the load for the movable body to swing.

[0008] In view of the above problems, the technical problem of the present invention is to provide an optical unit with jitter correction function, which can suppress the rotation of a movable body rotating about two axes orthogonal to the optical axis from being hindered by a flexible printed substrate.

[0009] To solve the aforementioned technical problem, the optical unit with jitter correction function of the present invention is characterized by comprising: a movable body having a camera module; a support body; a swing support mechanism that, when the optical axis of the camera module is aligned with the Z-axis by using three mutually orthogonal axes as the X-axis, Y-axis, and Z-axis, supports the movable body so that it can swing relative to the support body about the X-axis, and supports the movable body so that it can swing about the Y-axis; a swing drive mechanism that causes the movable body to swing about the X-axis and Y-axis; and a flexible printed circuit board extending from the movable body, wherein the swing center point of the movable body at the intersection of the X-axis, Y-axis, and Z-axis is located inside the movable body, and the flexible printed circuit board is wound around in a state where the thickness direction is towards the Z-axis direction. The substrate has, in sequence from the movable body toward the front end: an extension portion extending in the Z-axis direction from a position different from the swing center point of the movable body toward the X-axis direction; a zigzag portion bending once or multiple times toward the swing center point in the Z-axis direction such that it overlaps with the extension portion when viewed from the Z-axis direction; a first extension portion extending from the final zigzag portion in the Z-axis direction on the opposite side of the extension portion along a first extension direction different from the X-axis direction; and a second extension portion extending from the end portion of the first extension portion on the opposite side of the final zigzag portion along a second extension direction different from the first extension direction, wherein the final zigzag portion overlaps with an XY plane including the X-axis and the Y-axis.

[0010] According to the present invention, a flexible printed circuit board extending from a movable body is wound with its thickness direction oriented towards the Z-axis, and includes a first extension portion and a second extension portion extending in two different directions. Therefore, when the movable body rotates around X and Y axes orthogonal to the Z-axis, the first and second extension portions are more prone to bending compared to the case where the flexible printed circuit board is wound with its thickness direction oriented orthogonal to the Z-axis. Furthermore, after the flexible printed circuit board is extended in the Z-axis direction from a position different from the pivot point of the movable body towards the X-axis direction, it bends in the Z-axis direction to reach the XY plane including the X and Y axes, and then extends in the first and second extension directions. Thus, the first extension portion extends from a position close to the pivot point in the Z-axis direction towards the first extension direction. Additionally, the second extension portion is continuous with the first extension portion, therefore, it is possible to wind it at a position close to the pivot point in the Z-axis direction. Here, if the first and second extension portions extending in both directions are wound at positions close to the rotation center point in the Z-axis direction, the flexible printed circuit board is more prone to bending when the movable body rotates around the X and Y axes compared to when they are wound at positions far from the rotation center point in the Z-axis direction. Therefore, it is possible to prevent the rotation of the movable body from being hindered by the flexible printed circuit board. Furthermore, in this invention, the flexible printed circuit board is bent in the folded portion, but not bent at a specific angle. Therefore, when assembling an optical unit with jitter correction function, it is not necessary to bend the flexible printed circuit board to a predetermined angle. Thus, the assembly of the optical unit with jitter correction function becomes easier.

[0011] In this invention, the following structure can be adopted: the support body has a frame that surrounds the movable body from the radially outer side, and the first extension portion and the second extension portion are wound around the frame from the radially outer side of the frame. This allows the flexible printed circuit board to be wound near the support body, thus easily suppressing the increase in the area occupied by the optical unit with jitter correction function when viewed from the Z-axis direction.

[0012] In this case, the following structure can be adopted: the frame includes: a first frame portion and a second frame portion extending opposite to each other in the X-axis direction and parallel to the Y-axis direction; and a pair of third frame portions and a fourth frame portion extending opposite to each other in the Y-axis direction and parallel to the X-axis direction, the lead-out portion extending from the second frame portion toward the X-axis direction, the first extension setting direction being the Y-axis direction, the first extension setting portion extending along the second frame portion, the second extension setting direction being the X-axis direction, and the second extension setting portion extending along the fourth frame portion.

[0013] Furthermore, in this case, it is preferable that the lead-out portion extends from the second frame portion in the X-axis direction from a position closer to the third frame portion in the Y-axis direction than the fourth frame portion. This allows for a longer first extension portion extending along the second frame portion in the Y-axis direction, thus making it easier to flex the flexible printed circuit board when the movable body rotates around the X and Y axes.

[0014] In this invention, a structure can be adopted in which, when the folded portion undergoes one fold, a spacer is fixed between the folded portion in the folded portion that is opposite to the lead-out portion in the Z-axis direction and the lead-out portion. This makes it easy to maintain the shape of the folded portion in the Z-direction in a flexible printed circuit board.

[0015] In this invention, a structure can be adopted in which, when the folded portion undergoes multiple folds, a first spacer is fixed between the folded portion opposite to the lead-out portion in the Z-axis direction and the lead-out portion, and a second spacer is fixed between two adjacent folded portions in the Z-axis direction. This makes it easy to maintain the shape of the folded portion in the Z-axis direction in a flexible printed circuit board.

[0016] In this invention, it is preferable that the flexible printed circuit board comprises a first flexible printed circuit board and a second flexible printed circuit board extended from the movable body in an overlapping state in the Z-axis direction, with the bending portion undergoing two bends. This makes the flexible printed circuit board more prone to bending when the movable body rotates around the first and second axes, compared to the case where a single, wider flexible printed circuit board is extended from the movable body and wound around it. Furthermore, by performing two bends on the flexible printed circuit board in the bending portion, it is possible to suppress the difference between the first distance for winding the first flexible printed circuit board and the second distance for winding the second flexible printed circuit board in the bending portion. Therefore, it is possible to prevent or suppress the formation of wrinkles on one of the two bent flexible printed circuit boards. Consequently, it is possible to prevent or suppress the flexible printed circuit board from becoming difficult to bend due to wrinkles formed on one of the flexible printed circuit boards.

[0017] Invention Effects

[0018] According to the present invention, a flexible printed circuit board connected to a movable body is wound with its thickness direction oriented toward the Z-axis direction, and has a first extension portion and a second extension portion extending in two different directions. Furthermore, the first extension portion extends from a position near the swing center point toward the first extension direction in the Z-axis direction. Moreover, since the second extension portion is continuous with the first extension portion, it can be wound at a position near the swing center point in the Z-axis direction. Therefore, when the movable body rotates about the X and Y axes, the first and second extension portions easily flex. Thus, it is possible to prevent the rotation of the movable body from being hindered by the flexible printed circuit board. Attached Figure Description

[0019] Figure 1 This is a 3D view of an optical unit with jitter correction function.

[0020] Figure 2 This is a top view of the optical unit with jitter correction function.

[0021] Figure 3 This is an exploded stereoscopic view of the optical unit with jitter correction function.

[0022] Figure 4 It is along Figure 2 A cross-sectional view along line AA.

[0023] Figure 5 It is along Figure 2 A cross-sectional view of the BB line.

[0024] Figure 6 It is along Figure 2 A cross-sectional view of the CC line.

[0025] Figure 7 This is an explanatory diagram of a flexible printed circuit board.

[0026] Figure 8 This is a three-dimensional view of the optical unit with jitter correction function in a modified example.

[0027] Figure 9 This is a cross-sectional view of a modified optical unit with jitter correction function. Detailed Implementation

[0028] Hereinafter, embodiments of the optical unit with jitter correction function of the present invention will be described with reference to the accompanying drawings.

[0029] (Overall structure)

[0030] Figure 1 This is a 3D view of an optical unit with jitter correction function. Figure 2 This is a top view of the optical unit with jitter correction function. Figure 3 This is an exploded stereoscopic view of the optical unit with jitter correction function.

[0031] Figure 4 It is along Figure 2 A cross-sectional view along line AA. Figure 5 It is along Figure 2 A cross-sectional view of the BB line. Figure 6 It is along Figure 2 A cross-sectional view of the CC line.

[0032] like Figure 1 As shown, the optical unit 1 with shake correction function has a camera module 3 with a lens 2. The optical unit 1 with shake correction function is used, for example, in optical devices such as mobile phones with cameras, dashcams, action cameras mounted on mobile bodies such as helmets, bicycles, and radio-controlled helicopters, and wearable cameras. In such optical devices, if shake occurs during photography, the captured image will be distorted. To avoid tilting the captured image, the optical unit 1 with shake correction function corrects the tilt of the camera module 3 based on acceleration, angular velocity, and the amount of shake detected by a detection unit such as a gyroscope.

[0033] The optical unit 1 with shake correction function rotates the camera module 3 around a first axis R1 orthogonal to its optical axis L and around a second axis R2 orthogonal to both the optical axis L and the first axis R1 to perform shake correction. Thus, the optical unit 1 with shake correction function performs pitch correction and yaw correction.

[0034] The following description defines the three mutually orthogonal axes as the X-axis, Y-axis, and Z-axis. With the optical axis L of the camera module 3 aligned with the Z-axis, the optical unit with shake correction functionality will be explained. Furthermore, the directions along the X-axis, Y-axis, and Z-axis are defined as the X-axis direction, Y-axis direction, and Z-axis direction, respectively. One side of the X-axis direction is designated as the -X direction, and the other side as the +X direction. One side of the Y-axis direction is designated as the -Y direction, and the other side as the +Y direction. One side of the Z-axis direction is designated as the -Z direction, and the other side as the +Z direction. The Z-axis direction is along the optical axis L of the lens 2 of 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 relative to the X-axis and Y-axis about the Z-axis (about the optical axis L).

[0035] like Figure 1 , Figure 2 As shown, the optical unit 1 with shake correction function includes: a movable body 5, which has a camera module 3; a swing support mechanism 6, which supports the movable body 5 so that it can rotate about a first axis R1 and a second axis R2; and a support body 7, which 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 about the first axis R1 and about the second axis R2.

[0036] Furthermore, the optical unit 1 with jitter correction function has a flexible printed circuit board 8 extending from the movable body 5 to the outside of the support body 7. The flexible printed circuit board 8 extends from the movable body 5 in the +X direction, bends in the +Z axis direction, extends in the +Y direction, and then extends in the -X direction. A connector 9 is fixed to the front end of the flexible printed circuit board 8. The connector 9 is connected to a substrate (not shown) of the optical device on which the optical unit 1 with jitter correction function is mounted. Therefore, the front end portion of the flexible printed circuit board 8 is fixed.

[0037] Moreover, such as Figure 3 As shown, the optical unit 1 with jitter correction function has a jitter correction magnetic drive mechanism 10 (oscillation drive mechanism) for rotating a movable body 5 about a first axis R1 and a second axis R2. The jitter correction magnetic drive mechanism 10 includes: a first jitter correction magnetic drive mechanism 11, which generates a driving force on the movable body 5 about the X-axis; and a second jitter correction magnetic drive mechanism 12, which generates a driving force on the movable body 5 about the Y-axis. The first jitter correction magnetic drive mechanism 11 is disposed in the +Y direction of the movable body 5. The second jitter correction magnetic drive mechanism 12 is disposed in the -X direction of the movable body 5. The first jitter correction magnetic drive mechanism 11 and the second jitter correction magnetic drive mechanism 12 are arranged circumferentially about the optical axis L. In addition, the optical unit 1 with jitter correction function includes a flexible printed circuit board 13 that extends backward along the outer peripheral surface of the support body 7 in the +Y direction.

[0038] Here, as Figure 1 As shown, the movable body 5 rotates in the deflection direction YAW about the X-axis and the pitch direction PITCH about the Y-axis by combining the rotation about the first axis R1 and the rotation about the second axis R2.

[0039] (Moveable body)

[0040] like Figure 3 As shown, the movable body 5 includes a camera module 3 and a retainer 16 surrounding the camera module 3 from its outer periphery. The camera module 3 has a generally cuboid-shaped main body 17 and a lens barrel 18 protruding from the center of the main body 17 in the +Z direction, and a lens 2 is housed in the lens barrel 18. An image sensor 19 is housed at the -Z end of the main body 17. A flexible printed circuit board 8 extends from the -Z end of the main body 17. The flexible printed circuit board 8 is electrically connected to the image sensor 19.

[0041] The retainer 16 is made of resin. The retainer 16 surrounds the main body 17 of the camera module 3 radially outward. The lens barrel 18 of the camera module 3 protrudes further in the +Z direction than the retainer 16. The retainer 16 has: a first sidewall 21 and a second sidewall 22 extending parallel to the Y-axis direction; and a third sidewall 23 and a fourth sidewall 24 extending parallel to the X-axis direction. The first sidewall 21 is located in the -X direction of the second sidewall 22. The third sidewall 23 is located in the -Y direction of the fourth sidewall 24. Additionally, the movable body 5 includes: a fifth sidewall 25 and a sixth sidewall 26 diagonally located in the first axis R1 direction; and a seventh sidewall 27 and an eighth sidewall 28 diagonally located in the second axis R2 direction. The fifth sidewall 25 is located in the -X direction of the sixth sidewall 26. The seventh sidewall 27 is located in the -Y direction of the eighth sidewall 28.

[0042] A second magnet 36 is fixed to the first sidewall 21. The second magnet 36 is divided into two parts in the Z-axis direction. A first magnet 35 is fixed to the fourth sidewall 24. The first magnet 35 is divided into two parts in the Z-axis direction. The flexible printed circuit board 8 passes through a cutout 22a (see reference) at the end portion in the -Z direction of the second sidewall 22. Figure 6 And it is drawn out from the movable body 5 in the +X direction.

[0043] (Support structure)

[0044] like Figure 3 As shown, the support body 7 includes: a rectangular frame 30 that surrounds the retainer 16 of the movable body 5 radially outward; and a base plate 35 that closes the opening in the -Z direction of the frame 30. The frame 30 includes: a first frame portion 31 and a second frame portion 32 opposite each other in the X-axis direction; and a third frame portion 33 and a fourth frame portion 34 opposite 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.

[0045] A second coil holding hole 31a extending along the X-axis is provided on the first frame portion 31 (see reference). Figure 7 The second coil 38 is held in the second coil holding hole. A first coil holding hole (not shown) extending in the Y-axis direction is provided on the fourth frame portion 34. The first coil 37 is held in the first coil holding hole. The first coil 37 and the second coil 38 are both elongated oval hollow coils with a longer circumferential direction. Here, the first coil 37 and the second coil 38 are electrically connected to the flexible printed circuit board 13 wound along the outer side of the frame 30.

[0046] like Figure 3 , Figure 6 As shown, a cutout 32a is provided on the second frame portion 32. The flexible printed circuit board 8, which is led out from the movable body 5, is led out in the +X direction of the frame 30 via the cutout 32a.

[0047] (Swing support mechanism)

[0048] like Figure 2 As shown, the swing support mechanism 6 includes: a universal frame 40; a first connecting mechanism 41 that connects the universal frame 40 and the support body 7 in a manner rotatable about a first axis R1; and a second connecting mechanism 42 that connects the universal frame 40 and the movable body 5 in a manner rotatable about a second axis R2. The swing support mechanism 6 connects the movable body 5 and the support body 7 on the inner periphery of the frame 30.

[0049] The gimbal frame 40 is constructed of metal leaf springs. The gimbal frame 40 includes a gimbal frame body 45, which has an opening 45a through which the lens barrel 18 of the movable body 5 passes along the Z-axis. Additionally, as... Figure 3 As shown, the gimbal frame 40 includes: a pair of first gimbal frame extension portions 46 protruding from both sides of the gimbal frame main body 45 toward the first axis R1 and extending in the -Z direction; and a pair of second gimbal frame extension portions 47 protruding from both sides of the gimbal frame main body 45 toward the second axis R2 and extending in the -Z direction. The gimbal frame main body 45 is located in the +Z direction of the retainer 16 and overlaps with the main body 17 of the camera module 3 when viewed from the Z-axis direction. Figure 4 , Figure 5 As shown, a pair of first universal joint frame extension portions 46 and a pair of second universal joint frame extension portions 47 are located on the outer periphery of the retainer 16. In addition, a pair of first universal joint frame extension portions 46 and a pair of second universal joint frame extension portions 47 are located on the inner periphery of the frame 30.

[0050] like Figure 4 As shown, the first connecting mechanism 41 includes: a first sphere 51, which is fixed to the -Z-direction end portions of a pair of first universal frame extension portions 46 of the universal frame 40, and protrudes radially outward on the first shaft R1; and a metal first receiving member 52, which is fixed to the concave corner portions between the first frame portion 31 and the third frame portion 33 of the frame 30 and the concave corner portions between the third frame portion 33 and the fourth frame portion 34 of the frame 30. Each first receiving member 52 has a first concave curved surface 52a recessed radially outward on the first shaft R1. Figure 5As shown, the second connecting mechanism 42 includes: a second ball 53, which is fixed to the -Z direction end portions of a pair of second universal frame extension portions 47 of the universal frame 40, and protrudes radially inward on the second shaft R2; and second receiving members 54, which are fixed to the outer surfaces of the fifth side wall 25 and the sixth side wall 26 of the retainer 16, respectively. Each second receiving member 54 has a second concave curved surface 54a recessed radially inward on the second shaft R2.

[0051] When the movable body 5 is supported on the support body 7 by the swing support mechanism 6, such as Figure 4 As shown, a universal frame 40 is inserted into the inner side of a pair of first receiving parts 52 disposed on the first axis R1, so that the first ball 51 makes point contact with the first concave surface 52a on the first axis R1. This forms a first connecting mechanism 41, allowing the universal frame 40 to swing relative to the support body 7 about the first axis R1. Furthermore, when the movable body 5 is supported on the support body 7 via the swing support mechanism 6, as... Figure 5 As shown, a pair of second universal frame extension portions 47 of the universal frame 40 are arranged on the outer surfaces of a pair of second receiving members 54 disposed on the second axis R2, so that the second ball 53 and the second concave surface 54a make point contact on the second axis R2. This constitutes a second connecting mechanism 42, allowing the universal frame 40 to swing relative to the support body 7 about the second axis R2. Therefore, the swing support mechanism 6 connects the movable body 5 to the support body 7 in a state where it can rotate about the first axis R1 and the second axis.

[0052] Here, as Figure 4 , Figure 5 , Figure 6 As shown, the rotation center P of the movable body 5 around the X and Y axes is the intersection of the optical axis L, the first axis R1, and the second axis R2. Additionally, the rotation center P is the intersection of the X, Y, and Z axes. The rotation center P is located inside the movable body 5.

[0053] (Magnetic drive mechanism for jitter correction)

[0054] With the movable body 5 supported by the swing support mechanism 6 on the support body 7, such as Figure 6 As shown, the second magnet 36, fixed to the first sidewall 21 of the holder 16, and the second coil 38 of the support 7 are spaced apart and opposite each other in the X-axis direction. The second magnet 36 and the second coil 38 constitute the second jitter correction magnetic drive mechanism 12. Furthermore, from... Figure 3 It can be seen that the first magnet 35, which is fixed on the fourth side wall 24 of the retainer 16, and the first coil 37, which is fixed on the frame 30 of the support 7, are positioned opposite each other with a gap in the Y-axis direction. The first magnet 35 and the first coil 37 constitute the first jitter correction magnetic drive mechanism 11.

[0055] In the jitter correction magnetic drive mechanism 10, the movable body 5 is rotated about the X-axis by supplying power to the first coil 37. Additionally, the movable body is rotated about the Y-axis by supplying power to the second coil 38. The jitter correction magnetic drive mechanism 10 combines the rotation of the movable body 5 about the X-axis based on the first jitter correction magnetic drive mechanism 11 and the rotation of the movable body 5 about the Y-axis based on the second jitter correction magnetic drive mechanism 12, causing the movable body 5 to rotate about the first axis R1 and the second axis R2.

[0056] (Flexible printed circuit board)

[0057] Figure 7 This is an explanatory diagram of a flexible printed circuit board. (For example...) Figure 1 As shown, the flexible printed circuit board 8, extending from the movable body 5, is wound with its thickness direction oriented towards the Z-axis. (As indicated...) Figure 6 As shown, the flexible printed circuit board 8 has an extension portion 60 that extends from the -Z direction end portion of the movable body 5 toward the +X direction, and extends radially outward of the frame 30 via the cutout portion 32a of the frame 30. Figure 2 As shown, in this example, the lead-out portion 60 extends from the -Y direction side of the end portion in the -Z direction of the camera module 3 toward the +X direction. Therefore, in the second frame portion 32, the lead-out portion 60 extends toward the +X direction from a position closer to the third frame portion 33 in the Y-axis direction than the fourth frame portion 34.

[0058] Furthermore, the flexible printed circuit board 8 includes a folded portion 61 that bends over the lead-out portion 60 when viewed from the Z-axis direction. The folded portion 61 extends from the lead-out portion 60 towards the swing center point P (+Z direction) in the Z-axis direction. In this example, as... Figure 6 , Figure 7 As shown, the bend 61 bends twice. Therefore, the bend 61 includes: a first bend 61a that bends from the +X end of the lead-out portion 60 toward the +Z direction and then toward the -X direction; a first extension portion 61b that extends from the end portion of the first bend 61a opposite to the lead-out portion 60 in the -X direction and is opposite to the lead-out portion 60; a second bend 61c that bends from the end portion of the first extension portion 61b in the -X direction toward the +Z direction and then toward the +X direction; and a second extension portion 61d that extends from the end portion of the second bend 61c opposite to the first extension portion 61b in the +X direction and is opposite to the first extension portion 61b. The second extension portion 61d is the final bend in the bend 61 located on the opposite side of the lead-out portion 60 in the Z-axis direction. Figure 6 As shown, the final zigzag portion (second extension setting portion 61d) is located on the XY plane containing the X-axis and Y-axis.

[0059] Furthermore, the flexible printed circuit board 8, from the bend 61 toward the front end, sequentially includes 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 bend (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... Figure 2 As shown, the first extension section 62 extends along the second frame portion 32 of the frame 30. Furthermore, the second extension section 63 extends in the -X direction. Therefore, the second extension section 63 extends along the fourth frame portion 34 of the frame 30. A connector 9 is fixed to the front end of the second extension section 63. The second extension section 63 is connected via the connector 9 to a substrate (not shown) of an optical device equipped with an optical unit 1 with jitter correction function.

[0060] Here, as Figure 6 , Figure 7 As shown, a first spacer 66 is fixed between the lead-out portion 60 and the first extended portion 61b of the bend portion 61. Furthermore, a second spacer 67 is fixed between adjacent first extended portions 61b and second extended portions 61d in the Z-axis direction within the bend portion 61. The first spacer 66 and the second spacer 67 are identical components. Therefore, the thickness of the first spacer 66 in the Z-axis direction is the same as the thickness of the second spacer 67 in the Z-axis direction. Consequently, the bends in the bend portion 61 are spaced at the same intervals.

[0061] 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 extending from the camera module 3 in the +X direction, 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 the position where it is pulled out from the camera module 3. Therefore, in the lead-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 bending portion 61a, the first flexible printed circuit board 71 is located on the outer periphery of the second flexible printed circuit board 72. In the first extension 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 bending portion 61c, the first flexible printed circuit board 71 is located on the inner periphery of the second flexible printed circuit board 72. In the second extension 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.

[0062] Therefore, the first spacer 66 is fixed between the second flexible printed circuit board 72 of the lead-out portion 60 and the first flexible printed circuit board 71 of the first extended portion 61b. The second spacer 67 is fixed between the first flexible printed circuit board 71 of the first extended portion 61b and the second flexible printed circuit board 72 of the second extended portion 61d.

[0063] Here, as Figure 7 As shown, in this example where the flexible printed circuit board 8 has 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 wider than the width of the bend 61 in the Y-axis direction of the flexible printed circuit board 8. Therefore, both ends of the first spacer 66 in the Y-axis direction protrude from the bend 61 in the Y-axis direction, and both ends of the second spacer 67 in the Y-axis direction protrude from the bend 61 in the Y-axis direction. Furthermore, since the protruding portions of the first spacer 66 and the second spacer 67 are opposite each other in the Z-axis direction, 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 separating in the Z-axis direction.

[0064] Furthermore, a second adhesive layer 76 is provided, which extends from a protruding portion of the first spacer 66 from the bend 61 in the Y-axis direction to the first flexible printed circuit board 71 in the lead-out portion 60 located in the -Z direction. 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 at the lead-out portion 60. Moreover, a third adhesive layer 77 is provided, which extends from a protruding portion of the second spacer 67 from the bend 61 in the Y-axis direction to the first flexible printed circuit board 71 in the second extension portion 61d located in the +Z direction. The third adhesive layer 77 prevents the second flexible printed circuit board 72 from leaving the first flexible printed circuit board 71 in the +Z direction at the second extension portion 61d.

[0065] (Effects)

[0066] In this example, the flexible printed circuit board 8, extending from the movable body 5, is wound with its thickness direction oriented towards the Z-axis, and has 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, which are orthogonal to the Z-axis, the first extension portion 62 and the second extension portion 63 are more prone to bending compared to the case where the flexible printed circuit board 8 is wound with its thickness direction oriented towards the Z-axis.

[0067] Furthermore, after the flexible printed circuit board 8 is wound in the Z-axis direction from a position different from the pivot point P of the movable body 5 towards the X-axis direction, it bends 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. Thus, the first extension portion 62 of the flexible printed circuit board 8 extends from a position close to the pivot point P in the Z-axis direction towards the Y-axis direction. Moreover, since the second extension portion 63 of the flexible printed circuit board 8 is continuous with the first extension portion 62, it can be wound in a position close to the pivot point P in the Z-axis direction. Here, if the first extension portion 62 and the second extension portion 63 are wound in a position close to the rotation center point P in the Z-axis direction, compared to the case where they are wound in a position far from the rotation center point P in the Z-axis direction, the flexible printed circuit board 8 is more prone to bending when the movable body 5 rotates around the X and Y axes. Therefore, it is possible to prevent the rotation of the movable body 5 from being hindered by the flexible printed circuit board 8.

[0068] Furthermore, in this example, the flexible printed circuit board 8 is bent in the bend portion 61, but not at a specific angle. Therefore, when assembling the optical unit with jitter correction function, it is not necessary to bend the flexible printed circuit board 8 to a predetermined angle. Thus, the assembly of the optical unit with jitter correction function becomes easier.

[0069] In this example, the support 7 includes a frame 30 that surrounds the movable body 5 radially outward. The frame 30 includes: a first frame portion 31 and a second frame portion 32 extending opposite each other in the X-axis direction and parallel to the Y-axis direction; and a pair of third frame portions 33 and a fourth frame portion 34 extending opposite each other in the Y-axis direction and parallel to the X-axis direction. An extension portion 60 extends from the second frame portion 32 in the X-axis direction. A first extension portion 62 extends along the second frame portion 32 in the Y-axis direction. A second extension portion 63 extends along the fourth frame portion 34 in the X-axis direction. As a result, the flexible printed circuit board 8 can be wound around the support 7, thus easily suppressing the increase in the area occupied by the optical unit with jitter correction function when viewed from the Z-axis direction.

[0070] Furthermore, in this example, the lead-out portion 60 extends from the second frame portion 32 in the X-axis direction from a position closer to the third frame portion 33 in the Y-axis direction than the fourth frame portion 34. As a result, the first extension portion 62 extending along the second frame portion 32 in the Y-axis direction can be made longer, so the flexible printed circuit board 8 is easier to flex when the movable body 5 rotates around the X-axis and Y-axis.

[0071] Furthermore, a first spacer 66 is fixed between the first extended portion 61b, which is opposite to the lead-out portion 60 in the Z-axis direction, and the lead-out portion 60 in the bend 61. Additionally, a second spacer 67 is fixed between adjacent first extended portions 61b and second extended portions 61d in the Z-axis direction in the bend 61. Therefore, the shape of the bend 61 is easily maintained in the flexible printed circuit board 8.

[0072] 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 extended from the movable body 5 in an overlapping state in the Z-axis direction. Therefore, compared to the case where a wider flexible printed circuit board is extended from the movable body 5 and wound around it, the flexible printed circuit board 8 is more prone to bending when the movable body 5 rotates around the first axis R1 and the second axis R2.

[0073] Furthermore, if the flexible printed circuit board 8 is bent twice in the bend 61, then in the first bend 61a of the bend 61, the first flexible printed circuit board 71 is located outside the second flexible printed circuit board 72, and in the second bend 61c, the second flexible printed circuit board 72 is located outside the first flexible printed circuit board 71. This suppresses the difference between the first distance around the first flexible printed circuit board 71 and the second distance around the second flexible printed circuit board in the bend 61. Therefore, it prevents or suppresses the formation of wrinkles on one of the two flexible printed circuit boards 71 ​​and 72 during the bend. Thus, it prevents or suppresses the flexible printed circuit board 8 from becoming difficult to bend due to wrinkles formed on one of the flexible printed circuit boards 71 ​​and 72.

[0074] (Modified Example)

[0075] When a flexible printed circuit board 8 is extended from the movable body 5, the bending of the bending portion 61 can be once or more than twice. Figure 8 This is a three-dimensional view of the optical unit with jitter correction function in a modified example. Figure 9 This is a cross-sectional view of the modified optical unit with jitter correction function, cut with a plane including the optical axis and the X-axis. Furthermore, in the modified optical unit 1A with jitter correction function, a flexible printed circuit board 8A is extended from the movable body 5. Also, in the modified optical unit with jitter correction function, the winding method of the flexible printed circuit board 8A differs from the example described above, but the other structures are the same. Therefore, the same reference numerals are used to label the same structures, and the winding method of the flexible printed circuit board 8A will be described.

[0076] like Figure 8 As shown, in the optical unit 1A with jitter correction function in this example, the flexible printed circuit board 8A is also wound with its thickness direction facing the Z-axis direction. Figure 9As shown, the flexible printed circuit board 8A has an extension portion 60, which extends from the -Z direction end portion of the movable body 5 towards the +X direction, and extends radially outward from the cut portion 32a of the frame 30. Figure 8 As shown, the lead-out portion 60 extends from the second frame portion 32 of the retainer 16, from a position closer to the third frame portion 33 in the Y-axis direction than the fourth frame portion 34, towards the +X direction. Furthermore, the flexible printed circuit board 8A includes a folded portion 61 that bends once, overlapping the lead-out portion 60, when viewed from the Z-axis direction. The folded portion 61 extends from the lead-out portion 60 towards the swing center point P (+Z direction) in the Z-axis direction. Therefore, as... Figure 9 As shown, the bend portion 61 includes: a first bent portion 61a that bends from the +X end of the lead-out portion 60 toward the +Z direction and then toward the -X direction; and a first extended portion 61b that extends from the end of the first bent portion 61a opposite to the lead-out portion 60 in the -X direction and is opposite to the lead-out portion 60. The first extended portion 61b is the final bend portion of the bend portion 61 located on the opposite side of the lead-out portion 60 in the Z-axis direction. Figure 9 As shown, the final zigzag portion (second extension setting portion 61b) is located on the XY plane containing the X-axis and Y-axis.

[0077] Moreover, such as Figure 8 As shown, the flexible printed circuit board 8A has 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, sequentially extending from the bend portion 61 toward the front end. The first extension portion 62 is continuous with the edge of the final bend portion (second extension portion 61b) in the +Y direction. 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 23 at a position adjacent to the second frame portion 32 of the frame 30. In addition, the second extension direction of the second extension portion 63 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 front end of the second extension portion 63. Here, a first spacer 66 is fixed between the first extension portion 61b and the lead-out portion 60 in the Z-axis direction in the bend portion 61 by adhesive.

[0078] In this example, the flexible printed circuit board 8A extending from the movable body 5 is also wound with its thickness direction facing the Z-axis, and has 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, which are orthogonal to the Z-axis, the first extension portion 62 and the second extension portion 63 are more prone to bending compared to the case where the flexible printed circuit board 8A is wound with its thickness direction facing the direction orthogonal to the Z-axis.

[0079] Furthermore, after the flexible printed circuit board 8A extends from a position different from the swing center point P of the movable body 5 in the Z-axis direction towards the X-axis direction, it bends in the Z-axis direction to reach the XY plane including the X and Y axes, and then extends in both the Y and X-axis directions. Thus, the first extension portion 62 of the flexible printed circuit board 8A extends from a position close to the swing center point P in the Z-axis direction towards the Y-axis direction. Moreover, since the second extension portion 63 of the flexible printed circuit board 8A is continuous with the first extension portion 62, it can be wound around at a position close to the swing 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.

[0080] Symbol Explanation

[0081] 1…Optical unit with shake correction function; 2…Lens; 3…Camera module; 5…Moveable 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…Cage; 17…Main body; 18…Lens barrel; 19…Camera element Component; 21…First sidewall; 22…Second sidewall; 23…Third sidewall; 24…Fourth sidewall; 25…Fifth sidewall; 26…Sixth sidewall; 27…Seventh sidewall; 28…Eighth sidewall; 30…Frame; 31…First frame section; 32…Second frame section; 32a…Cut-out section; 33…Third frame section; 34…Fourth frame section; 35…First magnet; 36…Second magnet; 37…First coil; 38…Second coil; 40…Universal frame Frame; 41…First connecting mechanism; 42…Second connecting mechanism; 45…Universal frame main body; 45a…Opening; 46…First universal frame extension part; 47…Second universal frame extension part; 51…First sphere; 52…First receiving component…First concave surface; 53…Second sphere; 54…Second receiving component; 54a…Second concave surface; 60…Lead-out part; 61…Bend part; 61a…First bending part; 61b…First extension part; 61c…Second bending part; 61d…Second extension part; 62…First extension part; 63…Second extension part; 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. An optical unit with jitter correction function, characterized in that, Having: a movable body that includes a camera module; a support member; a swing support mechanism that supports the movable body so as to be swingable about an X-axis and about a Y-axis with respect to the support body when an optical axis of the camera module coincides with a Z-axis that is orthogonal to the X-axis and the Y-axis; a swing drive mechanism that swings the movable body about the X-axis and the Y-axis; and a flexible printed board that is drawn from the movable body, a swing center point of the movable body at which the X-axis, the Y-axis, and the Z-axis intersect is located inside the movable body, the flexible printed board is drawn in a state in which a thickness direction faces the Z-axis direction, and sequentially includes, from a front end of the movable body: a drawing-out portion that is drawn in the X-axis direction from a position different from the swing center point of the movable body in the Z-axis direction; a meandering portion that meanders one or more times toward the swing center point side in the Z-axis direction in a manner that overlaps the drawing-out portion when viewed from the Z-axis direction; a first extension arrangement portion that extends in a first extension arrangement direction different from the X-axis direction; and a second extension arrangement portion that extends in a second extension arrangement direction different from the first extension arrangement direction, in the meandering portion, a final meandering portion at which the first extension arrangement portion is continuous overlaps an XY plane that includes the X-axis and the Y-axis.

2. The optical unit with shake correction function according to claim 1, wherein the support body includes a frame that surrounds the movable body from a radially outer side, the first extension arrangement portion and the second extension arrangement portion are drawn along the frame on a radially outer side of the frame.

3. The optical unit with shake correction function according to claim 2, wherein the frame includes a first frame portion and a second frame portion that extend in the X-axis direction opposite to each other and in parallel with the Y-axis direction, and a pair of a third frame portion and a fourth frame portion that extend in the Y-axis direction opposite to each other and in parallel with the X-axis direction, the drawing-out portion is drawn in the X-axis direction from the second frame portion, the first extension arrangement direction is the Y-axis direction, the first extension arrangement portion is arranged along the second frame portion, the second extension arrangement direction is the X-axis direction, the second extension arrangement portion is arranged along the fourth frame portion.

4. The optical unit with shake correction function according to claim 3, wherein the drawing-out portion is drawn in the X-axis direction from a position in the second frame portion that is closer to the third frame portion than to the fourth frame portion in the Y-axis direction.

5. The optical unit with shake correction function according to any one of claims 1 to 4, wherein in a case where the meandering portion meanders once, a meandering portion in the meandering portion that is opposite to the drawing-out portion in the Z-axis direction is fixed with a spacer between the drawing-out portion. ​ 6. The optical unit with a shake correction function according to any one of claims 1 to 4, characterized in that In a case where the meandering portion meanders multiple times, a first spacer is fixed between a meandering portion in the meandering portion that opposes the lead-out portion in the Z-axis direction and the lead-out portion, and a second spacer is fixed between two meandering portions in the meandering portion that are adjacent in the Z-axis direction.

7. The optical unit with a shake correction function according to claim 6, characterized in that As the flexible printed board, a first flexible printed board and a second flexible printed board are provided that are led out from the movable body in a state of being overlaid in the Z-axis direction, The meandering portion meanders twice.

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