CN115707182A - Optical unit with shake correction function - Google Patents

Abstract

The invention provides an optical unit with a shake correction function, which can prevent a flexible printed substrate drawn out from a movable body from obstructing the movement of the movable body. A movable body (10) of an optical unit (1) with a shake correction function swings around X and Y axes that are orthogonal to an optical axis (L) and to each other. A flexible printed board (8) drawn out from a movable body (5) is drawn out in the X-axis direction from a position different from a swing center point (P) of the movable body (5) in the Z-axis direction, then meanders in the Z-axis direction, reaches an 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 wound in a state where the thickness direction is oriented in the Z-axis direction.

Description

Optical unit with shake correction function

Technical Field

The present invention relates to an optical unit with a shake correction function that performs shake correction by rotating a camera module about two axes orthogonal to an optical axis.

Background

In an optical unit mounted on a portable terminal or a mobile body, there is an optical unit that rotates a movable body, to which a camera module is mounted, around a predetermined axis in order to suppress disturbance of a photographed image when the portable terminal or the mobile body moves. Patent document 1 describes such an optical unit with a shake correction function.

The optical unit with shake correction function of this document includes: a movable body provided with a camera module; a fixed body; a support mechanism that supports the movable body so as to be rotatable about 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 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 thereof directed in the optical axis direction, and then bent by 90 ° in the optical axis direction. Then, the flexible printed board is oriented in a direction perpendicular to the optical axis in the thickness direction and is led around along the outer peripheral wall of the movable body in an L-shape. The flexible printed board is bent 90 degrees from the tip of the L-shape toward the outer circumference and fixed to a fixing body. Reinforcing plates for maintaining the bent shape are fixed to the two bent portions formed by bending the flexible printed board. When the movable body is rotated about the optical axis for shake correction, the flexible printed board is flexed between the movable body and the fixed body.

Documents of the prior art

Patent literature

Patent document 1: japanese patent laid-open No. 2020-27134

Disclosure of Invention

Some optical units with a shake correction function perform shake correction by rotating a movable body about a first axis orthogonal to an optical axis and about a second axis orthogonal to the optical axis and the first axis. When the flexible printed circuit board described in patent document 1 is used in such an optical unit with a shake correction function, a portion that is routed in a state where the thickness direction is oriented in a direction orthogonal to the optical axis is less likely to be bent when the movable body rotates about the first axis and the second axis, and a load for swinging the movable body increases.

In view of the above-described problems, an object of the present invention is to provide an optical unit with a shake correction function that can suppress the inhibition of the rotation of a movable body rotating about two axes orthogonal to the optical axis by a flexible printed circuit board.

In order to solve the above-described problems, an optical unit with a shake correction function according to the present invention includes: a movable body provided with a camera module; a support body; a swing support mechanism that supports the movable body so as to be swingable around the X axis with respect to the support body and so as to be swingable around the Y axis when the optical axis of the camera module coincides with the Z axis with three mutually orthogonal axes being the X axis, the Y axis, and the Z axis; a swing drive mechanism that swings the movable body about the X axis and the Y axis; and 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 being located inside the movable body, the flexible printed circuit board being drawn around in a state where a thickness direction is directed in the Z axis direction, the flexible printed circuit board having, in order from the movable body toward a tip: a drawing section that is drawn out in the Z-axis direction from a position different from the swing center point of the movable body in the X-axis direction; a meandering section that meanders one or more times in the Z-axis direction toward the swing center point side so as to overlap with the lead-out section when viewed from the Z-axis direction; a first extending portion extending in a first extending direction different from the X-axis direction from a final meandering portion of the meandering portion located on an opposite side of the lead-out portion in the Z-axis direction; and a second extending set portion extending from an end portion of the first extending set portion on the opposite side to the final meandering portion, which overlaps with an XY plane including the X axis and the Y axis, in a second extending set direction different from the first extending set direction.

According to the present invention, the flexible printed circuit board drawn out from the movable body is drawn around in a state where the thickness direction is oriented in the Z-axis direction, and includes the first extending portion and the second extending portion extending in two different directions from each other. Therefore, when the movable body rotates about the X axis and the Y axis orthogonal to the Z axis, the first extending portion and the second extending portion are more easily bent than when the flexible printed board is wound with the thickness direction oriented in the direction orthogonal to the Z axis. The flexible printed board is drawn out in the Z-axis direction from a position different from the swing center point of the movable body in the X-axis direction, then meanders in the Z-axis direction, reaches an XY plane including the X-axis and the Y-axis, and then extends in the first extending direction and the second extending direction. Thus, the first extension portion is drawn out in the first extension direction from a position close to the swing center point in the Z-axis direction. Further, the second extending portion is continuous with the first extending portion, and therefore can be routed at a position close to the swing center point in the Z-axis direction. Here, if the first extension portion and the second extension portion extending in the two directions are routed at positions close to the rotation center point in the Z-axis direction, the flexible printed board is easily deflected when the movable body rotates about the X-axis and the Y-axis, as compared with a case where they are routed at positions away from the rotation center point in the Z-axis direction. Therefore, the rotation of the movable body can be prevented from being hindered by the flexible printed board. In the present invention, the flexible printed circuit board is bent at the bent portion without being bent at a specific angle. Therefore, when the optical unit with the shake correction function is assembled, it is not necessary to bend the flexible printed board at a predetermined angle. Therefore, the optical unit with the shake correction function can be easily assembled.

In the present invention, the following structure can be adopted: the support body includes a frame body surrounding the movable body from a radial outer side, and the first extending portion and the second extending portion are routed along the frame body on the radial outer side of the frame body. In this way, since the flexible printed circuit board can be routed in the vicinity of the support, it is easy to suppress an increase in the occupied area of the optical unit with the shake correction function as viewed in the Z-axis direction.

In this case, the following structure can be adopted: the frame body is provided with: a first frame portion and a second frame portion that are opposed to each other in the X-axis direction and extend parallel to the Y-axis direction; and a pair of third and fourth frame portions that are opposed to each other in the Y-axis direction and extend in parallel to the X-axis direction, wherein the lead portion is led out from the second frame portion in the X-axis direction, the first extending direction is the Y-axis direction, the first extending portion is provided to extend along the second frame portion, the second extending direction is the X-axis direction, and the second extending portion is provided to extend along the fourth frame portion.

In this case, it is preferable that the drawing portion be drawn out in the second frame portion in the X axis direction from a position closer to the third frame portion than the fourth frame portion in the Y axis direction. In this way, since the first extending portion extending in the Y axis direction along the second frame portion can be provided long, the flexible printed circuit board can be more easily bent when the movable body rotates about the X axis and the Y axis.

In the present invention, the following structure can be adopted: when the bent portion is bent once, a spacer is fixed between a bent portion of the bent portion facing the lead-out portion in the Z-axis direction and the lead-out portion. In this way, the flexible printed circuit board can easily maintain the shape of the bent portion bent in the Z direction.

In the present invention, the following structure can be adopted: when the meandering portion is meandering a plurality of times, a first spacer is fixed between a meandering portion of the meandering portion that faces the lead-out portion in the Z-axis direction and the lead-out portion, and a second spacer is fixed between two meandering portions of the meandering portion that are adjacent in the Z-axis direction. In this way, the flexible printed circuit board can easily maintain the shape of the bent portion bent in the Z direction.

In the present invention, it is preferable that the flexible printed circuit board includes a first flexible printed circuit board and a second flexible printed circuit board drawn out from the movable body in a state of being overlapped in the Z-axis direction, and the bent portion is bent twice. In this way, the flexible printed circuit board is more likely to be flexed when the movable body rotates about the first axis and the second axis, as compared with a case where one wide flexible printed circuit board is pulled out and wound from the movable body. Further, if the flexible printed circuit board is bent twice in the bent portion, it is possible to suppress a difference from occurring between a first distance at which the first flexible printed circuit board is led around and a second distance at which the second flexible printed circuit board is led around in the bent portion. Therefore, the formation of wrinkles in one of the two meandering flexible printed boards can be prevented or suppressed. This can prevent or suppress the flexible printed board from becoming difficult to bend due to wrinkles generated in one flexible printed board.

Effects of the invention

According to the present invention, the flexible printed circuit board connected to the movable body is routed in a state where the thickness direction is oriented in the Z-axis direction, and has the first extension portion and the second extension portion extending in two different directions from each other. The first extending portion is drawn out in the first extending direction from a position near the swing center point in the Z-axis direction. Further, since the second extending portion is continuous with the first extending portion, it can be routed at a position close to the swing center point in the Z-axis direction. Therefore, when the movable body rotates about the X axis and the Y axis, the first extending portion and the second extending portion are easily bent. This can prevent the rotation of the movable body from being hindered by the flexible printed board.

Drawings

Fig. 1 is a perspective view of an optical unit with a shake correction function.

Fig. 2 is a plan view of the optical unit with the shake correction function.

Fig. 3 is an exploded perspective view of the optical unit with a shake correction function.

Fig. 4 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A of fig. 2.

Fig. 5 is a sectional view taken along line B-B of fig. 2.

Fig. 6 is a sectional view taken along line C-C of fig. 2.

Fig. 7 is an explanatory view of the flexible printed board.

Fig. 8 is a perspective view of an optical unit with a shake correction function according to a modification.

Fig. 9 is a cross-sectional view of an optical unit with a shake correction function according to a modification.

Detailed Description

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

(Overall Structure)

Fig. 1 is a perspective view of an optical unit with a shake correction function. Fig. 2 is a plan view of the optical unit with a shake correction function. Fig. 3 is an exploded perspective view of the optical unit with a shake correction function.

Fig. 4 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A of fig. 2. Fig. 5 is a sectional view taken along line B-B of fig. 2. Fig. 6 is a sectional view taken along line C-C of fig. 2.

As shown in fig. 1, an optical unit 1 with a shake correction function has a camera module 3 with a lens 2. The optical unit 1 with a shake correction function is used for optical devices such as a mobile phone with a camera and a drive recorder, an operation camera mounted on a moving body such as a helmet, a bicycle, and a radio-controlled helicopter, and an optical device such as a wearable camera. In such an optical device, if the optical device shakes during shooting, the captured image is disturbed. In order to prevent the captured image from tilting, the optical unit 1 with the shake correction function corrects the tilt of the camera module 3 based on the acceleration, angular velocity, shake amount, and the like detected by a detection unit such as a gyroscope.

The optical unit 1 with a shake correction function performs shake correction by rotating the camera module 3 about a first axis R1 orthogonal to the optical axis L thereof and about a second axis R2 orthogonal to the optical axis L and the first axis R1. Thus, the optical unit 1 with the shake correction function performs pitch correction and yaw correction.

Hereinafter, an optical unit with a shake correction function will be described with 3 axes orthogonal to each other as X, Y, and Z axes, and with the optical axis L of the camera module 3 being aligned with the Z axis. The directions along the X, Y, and Z axes are referred to as X, Y, and Z directions. One side in the X-axis direction is set as the-X direction, and the other side is set as the + X direction. One side in the Y-axis direction is set as the-Y direction, and the other side is set as the + Y direction. One side in the Z-axis direction is set as the-Z direction, and the other side is set as the + Z direction. The Z-axis direction is an optical axis direction along the optical axis L of the lens 2 included in the camera module 3. The Z direction is the image side of the camera module 3, and the + Z direction is the object side of the camera module 3. The first axis R1 and the second axis R2 are inclined at 45 degrees about the Z axis (about the optical axis L) with respect to the X axis and the Y axis.

As shown in fig. 1 and 2, the optical unit 1 with the blur correction function includes: a movable body 5 provided with a camera module 3; a swing support mechanism 6 that supports the movable body 5 rotatably about the first axis R1 and the second axis R2; and a support body 7 that supports the movable body 5 via the swing support mechanism 6. The support body 7 supports the movable body 5 via the swing support mechanism 6 so as to be swingable about the first axis R1 and about the second axis R2.

The optical unit 1 with shake correction function has a flexible printed circuit board 8 drawn out from the movable body 5 to the outside of the support body 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 front end of the flexible printed board 8. The connector 9 is connected to a substrate, not shown, of an optical device on which the optical unit 1 with the shake correction function is mounted. Therefore, the front end portion of the flexible printed board 8 is in a fixed state.

As shown in fig. 3, the optical unit 1 with shake correction function includes a shake correction magnetic drive mechanism 10 (oscillation drive mechanism) for rotating the movable body 5 about the first axis R1 and the second axis R2. The magnetic drive mechanism 10 for shake correction includes: a first magnetic drive mechanism 11 for shake correction that generates a driving force about the X axis with respect to the movable body 5; and a second magnetic drive mechanism 12 for correcting shake, which generates a driving force about the Y axis to the movable body 5. The first magnetic drive mechanism 11 for shake correction is disposed in the + Y direction of the movable body 5. The second shake correction magnetic drive mechanism 12 is disposed in the-X direction of the movable body 5. The first magnetic drive mechanism 11 for shake correction and the second magnetic drive mechanism 12 for shake correction are arranged in the circumferential direction around the optical axis L. The optical unit 1 with the shake correction function further includes a flexible printed circuit board 13 which is drawn out in the + Y direction after being wound along the outer peripheral surface of the support 7.

Here, as shown in fig. 1, the movable body 5 rotates in the YAW 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.

(Movable body)

As shown in fig. 3, the movable member 5 includes the camera module 3 and a holder 16 surrounding the camera module 3 from the outer peripheral side. The camera module 3 includes a substantially rectangular parallelepiped main body portion 17 and a lens barrel portion 18 protruding in the + Z direction from the center of the main body portion 17, and the lens 2 is housed in the lens barrel portion 18. An imaging element 19 is housed in an end portion of the main body 17 in the-Z direction. The flexible printed board 8 is drawn out from an end portion of the main body 17 in the-Z direction. The flexible printed board 8 is electrically connected to the image pickup device 19.

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

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 board 8 is drawn out from the movable body 5 in the + X direction through a notch 22a (see fig. 6) provided at an end portion of the second side wall 22 in the-Z direction.

(support)

As shown in fig. 3, the support 7 includes: a rectangular frame 30 surrounding the holder 16 of the movable body 5 from the radial outside; and a bottom plate 35 that closes the opening in the-Z direction of the housing 30. The frame 30 includes: a first frame portion 31 and a second frame portion 32 opposed to each other in the X-axis direction; and a third frame portion 33 and a fourth frame portion 34 opposed to each other in the Y axis direction. The first frame portion 31 is located in the-X direction of the second frame portion 32. The third frame portion 33 is located in the-Y direction of the fourth frame portion 34.

The first frame portion 31 is provided with a second coil holding hole 31a (see fig. 7) penetrating 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, penetrating 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 each an air-core coil that is long and oblong in the circumferential direction. Here, the first coil 37 and the second coil 38 are electrically connected to the flexible printed circuit board 13 routed along the outer surface of the housing 30.

As shown in fig. 3 and 6, the second frame portion 32 is provided with a cutout portion 32a. Flexible printed circuit 8 drawn out from movable body 5 is drawn out in the + X direction of frame 30 through notch 32a.

(swing supporting mechanism)

As shown in fig. 2, the swing support mechanism 6 includes: a gimbal frame 40; a first connecting mechanism 41 that connects the gimbal frame 40 and the support body 7 so as to be rotatable about a first axis R1; and a second connecting mechanism 42 that connects the gimbal frame 40 and the movable body 5 so as to be rotatable about the second axis R2. The swing support mechanism 6 connects the movable body 5 and the support body 7 to each other on the inner peripheral side of the frame 30.

The gimbal frame 40 is formed of a metal plate spring. The gimbal frame 40 includes a gimbal frame main body portion 45, and the gimbal frame main body portion 45 has an opening portion 45a through which the lens barrel portion 18 of the movable body 5 passes in the Z-axis direction. As shown in fig. 3, the gimbal frame 40 includes: a pair of first gimbal frame extension setting portions 46 that protrude from the gimbal frame main body portion 45 toward both sides in the first axis R1 direction and extend in the-Z direction; and a pair of second gimbal frame extension portions 47 that protrude from the gimbal frame main body portion 45 toward both sides in the second axis R2 direction and extend in the-Z direction. The gimbal frame main body portion 45 is located in the + Z direction of the holder 16, and overlaps the main body portion 17 of the camera module 3 when viewed from the Z-axis direction. As shown in fig. 4 and 5, the pair of first gimbal frame extension portions 46 and the pair of second gimbal frame extension portions 47 are located on the outer peripheral side of the holder 16. The pair of first gimbal frame extension portions 46 and the pair of second gimbal frame extension portions 47 are located on the inner peripheral side of the housing 30.

As shown in fig. 4, the first connection mechanism 41 includes: first balls 51 fixed to the-Z-direction end portions of the pair of first gimbal frame extension portions 46 of the gimbal frame 40, respectively, and protruding radially outward on the first axis R1; and a first metal receiving member 52 fixed to a recessed corner portion between the first frame portion 31 and the third frame portion 33 of the frame body 30 and a recessed corner portion between the third frame portion 33 and the fourth frame portion 34 of the frame body 30, respectively. Each first receiving member 52 includes a first concave curved surface 52a that is concave outward in the radial direction on the first axis R1. As shown in fig. 5, the second connection mechanism 42 includes: second balls 53 fixed to the-Z-direction end portions of the pair of second gimbal frame extension portions 47 of the gimbal frame 40, respectively, and protruding radially inward on the second axis R2; and second receiving members 54 fixed to the outer side surfaces of the fifth side walls 25 and the sixth side walls 26 of the retainer 16, respectively. Each second receiving member 54 includes a second concave curved surface 54a that is recessed radially inward on the second axis R2.

When the movable body 5 is supported by the support body 7 via the swing support mechanism 6, as shown in fig. 4, the gimbal frame 40 is inserted inside the pair of first receiving members 52 disposed on the first axis R1, and the first ball 51 and the first concave curved surface 52a are brought into point contact on the first axis R1. Thus, the first connecting mechanism 41 is configured, and therefore, the gimbal frame 40 can swing about the first axis R1 with respect to the support body 7. In the case where the movable body 5 is supported by the support body 7 via the rocking support mechanism 6, as shown in fig. 5, the pair of second gimbal frame extension portions 47 of the gimbal frame 40 are disposed on the outer side surfaces of the pair of second receiving members 54 disposed on the second axis R2, and the second ball 53 is brought into point contact with the second concave curved surface 54a on the second axis R2. Thus, the second connection mechanism 42 is configured, and therefore, the gimbal frame 40 can swing about the second axis R2 with respect to the support body 7. Therefore, the swing support mechanism 6 connects the movable body 5 to the support body 7 in a rotatable state about the first axis R1 and the second axis.

Here, as shown in fig. 4, 5, and 6, a rotation center point P of the movable body 5 about the X axis and the Y axis is an intersection point where the optical axis L, the first axis R1, and the second axis R2 intersect. The rotation center point P is an intersection where the X axis, the Y axis, and the Z axis intersect. The rotation center point P is located inside the movable body 5.

(magnetic drive mechanism for shake correction)

In a state where the movable body 5 is supported by the support body 7 via the swing support mechanism 6, as shown in fig. 6, the second magnet 36 fixed to the first side wall 21 of the holder 16 and the second coil 38 of the support body 7 face each other with a gap in the X-axis direction. The second magnet 36 and the second coil 38 constitute the second shake correction magnetic drive mechanism 12. As is apparent from fig. 3, the first magnet 35 fixed to the fourth side wall 24 of the holder 16 and the first coil 37 fixed to the frame 30 of the support 7 face each other with a gap therebetween in the Y-axis direction. The first magnet 35 and the first coil 37 constitute the first magnetic drive mechanism 11 for shake correction.

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

(Flexible printed substrate)

Fig. 7 is an explanatory view of the flexible printed board. As shown in fig. 1, the flexible printed circuit board 8 drawn out from the movable body 5 is routed in a state where the thickness direction is oriented in the Z-axis direction. As shown in fig. 6, flexible printed circuit 8 includes lead-out portion 60, and lead-out portion 60 is drawn out in the + X direction from the end portion of movable body 5 in the-Z direction and extends to the outside in the radial direction of frame 30 via notch 32a of frame 30. As shown in fig. 2, in this example, the lead-out portion 60 is led out in the + X direction from the-Y direction side of the end portion of the camera module 3 in the-Z direction. Therefore, the lead portion 60 is led out in the + X direction from a position closer to the third frame portion 33 than the fourth frame portion 34 in the Y axis direction in the second frame portion 32.

The flexible printed board 8 includes a bent portion 61 that is bent so as to overlap the lead portion 60 when viewed from the Z-axis direction. The meandering portion 61 extends from the lead-out portion 60 toward the swing center point P side (+ Z direction) in the Z-axis direction. In this example, as shown in fig. 6 and 7, the meandering portion 61 meanders 2 times. Therefore, the meandering portion 61 includes: a first curved portion 61a curved in the-X direction toward the + Z direction from the end in the + X direction of the lead-out portion 60; a first extending portion 61b extending in the-X direction from an end portion of the first curved portion 61a opposite to the lead portion 60 and facing the lead portion 60; a second curved portion 61c curved toward the + Z direction toward the + X direction from an end of the first extension setting portion 61b in the-X direction; and a second extension portion 61d extending in the + X direction from an end portion of the second bent portion 61c opposite to the first extension portion 61b and facing the first extension portion 61b. The second extended portion 61d is a final meandering portion of the meandering portion 61 located on the opposite side from the lead-out portion 60 in the Z-axis direction. As shown in fig. 6, the final meandering section (second extension setting section 61 d) is located on an XY plane including the X axis and the Y axis.

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

Here, as shown in fig. 6 and 7, a first spacer 66 is fixed between the lead portion 60 and the first extending portion 61b of the bent portion 61. In addition, a second spacer 67 is fixed between the first extending portion 61b and the second extending portion 61d adjacent in the Z-axis direction in the bent portion 61. The first spacer 66 and the second spacer 67 are the same component. Therefore, the thickness dimension of the first spacer 66 in the Z-axis direction is the same as the thickness dimension of the second spacer 67 in the Z-axis direction. Therefore, the meandering sections 61 have the same meandering interval.

In this example, the flexible printed board 8 includes a first flexible printed board 71 and a second flexible printed board 72 which are drawn out from the camera module 3 in the + X direction in a state of being overlapped in the Z axis direction. The first flexible printed board 71 is located in the-Z direction of the second flexible printed board 72 at a position pulled out from the camera module 3. Therefore, in the lead portion 60, the first flexible printed circuit 71 is positioned in the-Z direction of the second flexible printed circuit 72. In the first curved portion 61a, the first flexible printed substrate 71 is located on the outer peripheral side of the second flexible printed substrate 72. In the first extension setting portion 61b, the first flexible printed substrate 71 is located in the + Z direction of the second flexible printed substrate 72. In the second curved portion 61c, the first flexible printed substrate 71 is located on the inner peripheral side of the second flexible printed substrate 72. In the second extension setting portion 61d, the first flexible printed substrate 71 is located in the-Z direction of the second flexible printed substrate 72. In the first extension setting part 62 and the second extension setting part 63, the first flexible printed substrate 71 is positioned in the-Z direction of the second flexible printed substrate 72.

Thus, the first spacer 66 is fixed between the second flexible printed substrate 72 of the lead-out portion 60 and the first flexible printed substrate 71 of the first extension setting portion 61b. The second spacer 67 is fixed between the first flexible printed substrate 71 of the first extension setting portion 61b and the second flexible printed substrate 72 of the second extension setting portion 61d.

Here, as shown in fig. 7, in the present example in which the flexible printed circuit board 8 includes two flexible printed circuit boards 71 and 72, the width of the first spacer 66 in the Y axis direction and the width of the second spacer 67 in the Y axis direction are made wider than the width of the bent portion 61 of the flexible printed circuit board 8 in the Y axis direction. Thus, both ends of the first spacer 66 in the Y axis direction are projected from the bent portion 61 in the Y axis direction, and both ends of the second spacer 67 in the Y axis direction are projected from the bent portion 61 in the Y axis direction. Further, since the protruding portion of the first spacer 66 protruding from the meandering portion 61 in the Y-axis direction and the protruding portion of the second spacer 67 protruding from the meandering portion in the Y-axis direction are opposed to each other in the Z-axis direction, an adhesive is filled between them to form the first adhesive layer 75. The first adhesive layer 75 prevents the first spacer 66 and the second spacer 67 from being separated in the Z-axis direction.

Further, a second adhesive layer 76 is provided, and the second adhesive layer 76 reaches the first flexible printed circuit board 71 positioned in the-Z direction in the lead-out portion 60 from the protruding portion of the first spacer 66 protruding from the meandering portion 61 in the Y-axis 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 portion 60. Further, a third adhesive layer 77 is provided, and the third adhesive layer 77 reaches the first flexible printed circuit board 71 positioned in the + Z direction in the second extending portion 61d from the protruding portion of the second spacer 67 protruding from the meandering portion in the Y axis direction. The third adhesive layer 77 prevents the second flexible printed circuit 72 from separating from the first flexible printed circuit 71 in the + Z direction at the second extension portion 61d.

(Effect)

According to this example, the flexible printed circuit board 8 drawn out from the movable body 5 is drawn around with its thickness direction oriented in the Z-axis direction, and includes the first extension portion 62 and the second extension portion 63 extending in two different directions. Therefore, when the movable body 5 rotates about the X axis and the Y axis orthogonal to the Z axis, the first extension portion 62 and the second extension portion 63 are more easily bent than in the case where the flexible printed circuit board 8 is wound so that the thickness direction is oriented in the direction orthogonal to the Z axis.

The flexible printed board 8 is led in the Z-axis direction from a position different from the swing center point P of the movable body 5 in the X-axis direction, then meanders in the Z-axis direction, reaches an XY plane including the X axis and the Y axis, and then extends in the Y-axis direction and the X-axis direction. Thus, 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. Further, 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 at 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 at positions close to the rotation center point P in the Z-axis direction, the flexible printed circuit board 8 is more likely to be bent when the movable body 5 rotates about the X-axis and the Y-axis than when they are routed at positions away from the rotation center point P in the Z-axis direction. Therefore, the flexible printed circuit board 8 can be prevented from obstructing the rotation of the movable body 5.

In this example, the flexible printed circuit board 8 is bent at the bent portion 61 and is not bent at a specific angle. Therefore, when assembling the optical unit with the shake correction function, it is not necessary to bend the flexible printed circuit board 8 at a predetermined angle. Therefore, the optical unit with the shake correction function can be easily assembled.

In this example, the support body 7 includes a frame 30 surrounding the movable body 5 from the radially outer side. The frame 30 includes: a first frame portion 31 and a second frame portion 32 which are opposed to each other in the X-axis direction and extend in parallel to the Y-axis direction; and a pair of third frame portion 33 and fourth frame portion 34 that are opposed to each other in the Y-axis direction and extend parallel to the X-axis direction. The lead portion 60 is led out from the second frame portion 32 in the X-axis direction. The first extending portion 62 extends in the Y axis direction along the second frame portion 32. The second extending portion 63 extends in the X-axis direction along the fourth frame portion 34. This makes it possible to wind the flexible printed circuit board 8 in the vicinity of the support 7, and therefore, it is easy to suppress an increase in the occupied area of the optical unit with the shake correction function as viewed from the Z-axis direction.

In this example, the drawing portion 60 is drawn in the X axis direction from a position closer to the third frame portion 33 than the fourth frame portion 34 in the Y axis direction in the second frame portion 32. Accordingly, the first extending portion 62 extending in the Y axis direction along the second frame portion 32 can be provided long, and therefore, the flexible printed circuit board 8 can be more easily bent when the movable body 5 rotates about the X axis and the Y axis.

Further, a first spacer 66 is fixed to the bent portion 61 between the first extending portion 61b opposed to the lead portion 60 in the Z-axis direction and the lead portion 60. In addition, a second spacer 67 is fixed between the first extending portion 61b and the second extending portion 61d adjacent to each other in the Z-axis direction in the bent portion 61. Therefore, the shape of the bent portion 61 is easily maintained in the flexible printed circuit board 8.

Here, in this example, the flexible printed circuit board 8 includes a first flexible printed circuit board 71 and a second flexible printed circuit board 72 which are drawn out from the movable body 5 in a state of being overlapped in the Z-axis direction. Therefore, the flexible printed circuit board 8 is more likely to be bent when the movable body 5 rotates about the first axis R1 and the second axis R2, as compared with a case where one wide flexible printed circuit board is drawn out from the movable body 5 and wound.

When the flexible printed circuit board 8 is bent twice in the bent portion 61, the first flexible printed circuit board 71 is positioned outside the second flexible printed circuit board 72 in the first bent portion 61a of the bent portion 61, and the second flexible printed circuit board 72 is positioned outside the first flexible printed circuit board 71 in the second bent portion 61 c. This can suppress the occurrence of a difference between a first distance for routing the first flexible printed circuit 71 and a second distance for routing the second flexible printed circuit in the meandering portion 61. Therefore, the formation of wrinkles in one of the two meandering flexible printed boards 71 and 72 can be prevented or suppressed. This prevents or suppresses the flexible printed circuit board 8 from being hardly flexed due to the wrinkle generated in one of the flexible printed circuit boards 71 and 72.

(modification example)

When one flexible printed circuit board 8 is pulled out from the movable body 5, the meandering portion 61 may be meandering 1 time or 2 times or more. Fig. 8 is a perspective view of an optical unit with a shake correction function according to a modification. Fig. 9 is a cross-sectional view of an optical unit with a shake correction function according to a modification, taken along a plane including the optical axis and the X axis. In the optical unit 1A with shake correction function according to the modification, one flexible printed circuit board 8A is drawn out from the movable body 5. In the optical unit with shake correction function according to the modification, the winding method of the flexible printed circuit board 8A is different from that of the above-described example, and the other configurations are the same. Therefore, the same components are denoted by the same reference numerals, and the winding method of the flexible printed circuit board 8A will be described.

As shown in fig. 8, in the optical unit 1A with shake correction function of this example, the flexible printed board 8A is also wound in a state where the thickness direction is oriented in the Z-axis direction. As shown in fig. 9, the flexible printed circuit board 8A includes a lead portion 60, and the lead portion 60 is led out in the + X direction from an end portion of the movable body 5 in the-Z direction and extends to the outside of the frame 30 in the radial direction via the notch portion 32a of the frame 30. As shown in fig. 8, the lead portion 60 is led out in the + X direction from a position closer to the third frame portion 33 than the fourth frame portion 34 in the Y axis direction in the second frame portion 32 of the holder 16. The flexible printed circuit board 8A includes a bent portion 61 that is bent once so as to overlap the lead portion 60 when viewed from the Z-axis direction. The meandering portion 61 extends from the lead-out portion 60 toward the swing center point P side (+ Z direction) in the Z-axis direction. Therefore, as shown in fig. 9, the meandering portion 61 includes: a first curved portion 61a curved in the-X direction from the + X direction end of the lead portion 60 toward the + Z direction; and a first extending portion 61b extending in the-X direction from an end of the first curved portion 61a opposite to the lead portion 60 and facing the lead portion 60. The first extended portion 61b is a final meandering portion of the meandering portion 61 located on the opposite side from the lead-out portion 60 in the Z-axis direction. As shown in fig. 9, the final meandering section (second extension setting section 61 b) is located on an XY plane including the X axis and the Y axis.

As shown in fig. 8, the flexible printed circuit board 8A includes, in order from the bent portion 61 toward the front end, a first extending portion 62 extending in a first extending direction and a second extending portion 63 extending in a second extending direction different from the first extending direction. The first extension portion 62 is continuous with the end edge in the + Y direction of the final meandering portion (second extension portion 61 b). The second extension portion 63 is continuous with the first extension portion 62. The first extending direction is the Y-axis direction. Therefore, the first extended portion 62 is extended along the second frame portion 23 at a position adjacent to the second frame portion 32 of the frame body 30. In addition, the second extending direction in which the second extending portion 63 extends is the-X direction. Therefore, the second extending portion 63 extends along the fourth frame portion 34 of the frame 30. A connector 9 is fixed to the distal end of the second extension 63. Here, a first spacer 66 is fixed to the bent portion 61 by an adhesive between the first extending portion 61b facing the lead portion 60 in the Z-axis direction and the lead portion 60.

In this example, the flexible printed circuit board 8A drawn out from the movable body 5 is also drawn around 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 about the X axis and the Y axis orthogonal to the Z axis, the first extension portion 62 and the second extension portion 63 are more easily bent than in the case where the flexible printed circuit board 8A is wound so that the thickness direction thereof is oriented in the direction orthogonal to the Z axis.

The flexible printed circuit board 8A is drawn out in the Z-axis direction from a position different from the swing center point P of the movable body 5 in the X-axis direction, then meanders 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. Thus, the first extension portion 62 of the flexible printed circuit board 8A is drawn out in the Y-axis direction from a position close to the pivot center point P in the Z-axis direction. Further, since the second extension portion 63 of the flexible printed circuit board 8A is continuous with the first extension portion 62, it can be routed at a position close to the pivot center point P in the Z-axis direction. Therefore, the flexible printed circuit board 8A can suppress the rotation of the movable body 5 from being hindered.

Description of the symbols

1 \ 8230, an optical unit with a shake correction function; 2 \ 8230and lenses; 3 \ 8230and camera module; 5 \ 8230a movable body; 6\8230aswing supporting mechanism; 7 \ 8230and a support body; 8. 8A 8230and flexible printed substrate; 9\8230aconnector; 10 823080, a magnetic drive mechanism for correcting shake; 11 \ 8230, a first magnetic drive mechanism for shake correction; 12 \ 8230and a second magnetic drive mechanism for shake correction; 13 8230and flexible printed substrate; 16 \ 8230and a retainer; 17 \ 8230and a main body part; 18 \ 8230and a lens barrel part; 19 \ 8230and an image pickup element; 21 \ 8230and a first side wall; 22 \ 8230and a second side wall; 23 \ 8230and a third side wall; 24 \ 8230and a fourth side wall; 25 \ 8230and a fifth side wall; 26 \ 8230and a sixth side wall; 27 \ 8230and a seventh side wall; 28 \ 8230and an eighth side wall; 30 \ 8230and a frame body; 31 \ 8230and a first frame part; 32 \ 8230and a second frame part; 32a 8230, a cut part; 33 \ 8230and a third frame part; 34 \ 8230and a fourth frame part; 35 \ 8230and a first magnet; 36 \ 8230and a second magnet; 37 \ 8230and a first coil; 38 \ 8230and a second coil; 40 \ 8230and universal frame; 41 8230a first connecting mechanism; 42 8230a second connecting mechanism; 45 \ 8230and a main body part of a gimbal frame; 45a 8230and an opening part; 46-8230a first universal frame extending part; 47 \ 8230and a second gimbal frame extension part; 51 \ 8230a first sphere; 52 \ 8230a first bearing part 8230and a first concave curved surface; 53 \ 8230a second sphere; 54 \ 8230a second bearing part; 54a \ 8230and a second concave curved surface; 60 \ 8230and a leading-out part; 61 \ 8230a zigzag part; 61a 8230, a first curved portion; 61b 8230a first extension setting part; 61c 8230a second curved portion; 61d 8230and a second extension setting part; 62, 8230a first extending arrangement part; 63 \ 8230and a second extension setting part; 66 \ 8230a first spacer; 67 \ 8230a second spacer; 71 \ 8230a first flexible printed substrate; 72 \ 8230and a second flexible printed substrate; 75 \ 8230and a first adhesive layer; 76 \ 8230and a second adhesive layer; 77 \ 8230and a third adhesive layer; l8230and optical axis; r1 \ 8230and a first shaft; r2 (8230); and second axis.

Claims (7)

1. An optical unit with a shake correction function, comprising:

a movable body provided with a camera module;

a support member;

a swing support mechanism that supports the movable body so as to be swingable around the X axis with respect to the support body and so as to be swingable around the Y axis when three mutually orthogonal axes are set as the X axis, the Y axis, and the Z axis so that the optical axis of the camera module coincides with the Z axis;

a swing drive mechanism that swings the movable body about the X axis and the Y axis; and

a flexible printed substrate 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 wound in a state where a thickness direction thereof is oriented in the Z-axis direction, and includes, in order from the movable body toward a tip: a lead-out portion that is led out in the Z-axis direction from a position different from the swing center point of the movable body in the X-axis direction; a meandering section that meanders one or more times in the Z-axis direction toward the swing center point side so as to overlap the lead-out section when viewed from the Z-axis direction; a first extension setting portion that extends in a first extension setting direction different from the X-axis direction; and a second extension setting portion extending in a second extension setting direction different from the first extension setting direction,

in the meandering portion, a final meandering portion in which the first extension portions are continuous overlaps with an XY plane including the X axis and the Y axis.

2. The optical unit with a shake correcting function according to claim 1,

the support body includes a frame body surrounding the movable body from a radial outer side,

the first extension setting part and the second extension setting part are wound along the frame body at the radial outer side of the frame body.

3. An optical unit with a shake correcting function according to claim 2,

the frame body is provided with: a first frame portion and a second frame portion that are opposed to each other in the X-axis direction and extend parallel to the Y-axis direction; and a pair of third and fourth frame portions that are opposed to each other in the Y-axis direction and extend parallel to the X-axis direction,

the lead-out portion is led out from the second frame portion in the X-axis direction,

the first extending direction is the Y-axis direction,

the first extending portion extends along the second frame portion,

the second extending direction is the X-axis direction,

the second extending portion extends along the fourth frame portion.

4. The optical unit with shake correcting function according to claim 3,

the lead portion is led out in the second frame portion in the X axis direction from a position closer to the third frame portion than the fourth frame portion in the Y axis direction.

5. The optical unit with a shake correction function according to any one of claims 1 to 4,

when the bent portion is bent once, a spacer is fixed between the lead-out portion and a bent portion of the bent portion facing the lead-out portion in the Z-axis direction.

6. The optical unit with a shake correcting function according to any one of claims 1 to 4,

when the meandering portion is meandering a plurality of times, a first spacer is fixed between a meandering portion of the meandering portion that faces the lead-out portion in the Z-axis direction and the lead-out portion, and a second spacer is fixed between two meandering portions of the meandering portion that are adjacent in the Z-axis direction.

7. The optical unit with shake correcting function according to claim 6,

the flexible printed circuit board includes a first flexible printed circuit board and a second flexible printed circuit board drawn out from the movable body in a state of being overlapped in the Z-axis direction,

the bent portion is bent twice.

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