JP2020160373A - Optical unit with tremor correction function - Google Patents

Abstract

To achieve miniaturization of an optical unit with a tremor correction function, and secure a space for laying out a flexible printed substrate.SOLUTION: An optical unit 1 with a tremor correction function comprises: a movable body 3 that includes an optical module 2; an anchoring body 5 that supports the movable body 3 via the gimbal mechanism 4; and a tremor correction drive mechanism 6 that causes the movable body 3 to oscillate in two directions around a first axial line R1 and around a second axial line R2, which mutually go across. The tremor correction drive mechanism 6 is arranged in mutually going-across two surfaces of four surfaces of the movable body 3. Also, a first flexible printed substrate 7 is pulled out from one of the two surfaces where the tremor correction drive mechanism 6 is not arranged.SELECTED DRAWING: Figure 2

Description

The present invention relates to an optical unit with a runout correction function that corrects runout of an optical module.

The optical unit mounted on the mobile terminal or the moving body swings or rotates the movable body on which the optical module is mounted in order to suppress the disturbance of the captured image when the mobile terminal or the moving body is moved. Some are equipped with a correction mechanism. Patent Document 1 discloses this kind of optical unit with a runout correction function. The optical unit with a runout correction function of Patent Document 1 includes a gimbal mechanism for swingably supporting a movable body and a runout correction drive mechanism for swinging the movable body. The runout correction drive mechanism is a magnetic drive mechanism including a magnet and a coil.

JP-A-2014-6522

In Patent Document 1, a runout correction drive mechanism, a gimbal mechanism, and a movable body (optical module) are housed inside a case which is a component on the fixed body side. The runout correction drive mechanism includes a magnet arranged on the side surface of the movable body and a coil arranged on the inner surface of the fixed body. A pair of magnets and coils is arranged on each of the four surfaces of a movable body and a fixed body. However, when the magnetic drive mechanisms are arranged on the four surfaces, the arrangement space of the runout correction drive mechanism seen from the optical axis direction is large. Therefore, it is disadvantageous in downsizing the optical unit with the runout correction function.

Further, if the magnetic drive mechanisms are arranged on the four surfaces, it may not be possible to secure a space for routing the flexible printed circuit board when the flexible printed circuit board is pulled out from the movable body to the outer peripheral side. For example, in order to prevent a load from being applied to the flexible printed circuit board when the movable body swings, it is not possible to secure a space for bending the flexible printed circuit board in the optical axis direction and extending it along the side surface of the movable body.

In view of these points, an object of the present invention is to reduce the size of the optical unit with a runout correction function and to secure a space for routing the flexible printed circuit board.

In order to solve the above problems, the optical unit with a runout correction function of the present invention supports a movable body provided with an optical module and the movable body so as to be swingable around a first axis intersecting the optical axis. A swing support mechanism that swingably supports the movable body around a second axis that intersects the optical axis and the first axis, and a fixed body that supports the movable body via the swing support mechanism. The movable body has a runout correction drive mechanism that swings the movable body around the first axis and around the second axis, and a flexible printed substrate connected to the movable body, and the movable body has the optical axis. Opposite the first and second surfaces located on opposite sides of the optical axis in the first direction intersecting the axis and the optical axis in the second direction intersecting the optical axis and the first direction. It has a third surface and a fourth surface located on the side, and the runout correction drive mechanism is provided at two locations, one of the first surface and the second surface, and one of the third surface and the fourth surface. Of the first surface, the second surface, the third surface, and the fourth surface, one of the two surfaces on which the runout correction drive mechanism is not arranged is the flexible printed substrate. Is characterized by being pulled out.

According to the present invention, there is provided a runout correction drive mechanism that swings the movable body in two directions, one around the first axis and the other around the second axis that intersect each other. Therefore, it is possible to perform runout correction in two directions. Further, the runout correction drive mechanism is arranged on two of the four surfaces of the movable body that intersect each other. Therefore, the arrangement space of the runout correction drive mechanism can be reduced as compared with the case where the runout correction drive mechanism is arranged on all four surfaces. Therefore, the size of the optical unit with the runout correction function can be reduced. Further, the flexible printed circuit board is pulled out from one of the four surfaces of the movable body on which the runout correction drive mechanism is not arranged. Therefore, it is possible to secure a space for routing the flexible printed circuit board in the optical axis direction along the side surface of the movable body.

In the present invention, the center of gravity of the optical module is deviated from the optical axis, and the runout correction drive mechanism may be arranged on the side opposite to the side where the center of gravity of the optical module is located with respect to the optical axis. preferable. In this way, the center of gravity of the movable body can be brought closer to the optical axis. Thereby, the impact resistance can be improved. Further, since the runout correction can be performed with a small torque, the runout correction drive mechanism can be miniaturized. In addition, power consumption can be reduced.

In the present invention, it is preferable that the optical module includes a lens and a lens driving mechanism, and the lens driving mechanism is arranged on the opposite side of the shake correction driving mechanism and the optical axis. In this way, the direction of deviation of the center of gravity due to the arrangement of the lens drive mechanism and the direction of deviation of the center of gravity due to the arrangement of the drive mechanism for vibration correction are opposite to each other, so that the center of gravity of the movable body can be brought closer to the optical axis. it can. Therefore, the impact resistance can be improved. Further, since the runout correction can be performed with a small torque, the runout correction drive mechanism can be miniaturized. In addition, power consumption can be reduced.

In the present invention, the lens driving mechanism is a magnetic driving mechanism. By arranging the lens drive mechanism and the runout correction drive mechanism on opposite sides of the optical axis, the distance between the lens drive mechanism and the runout correction drive mechanism can be increased. Therefore, even if the lens drive mechanism is a magnetic drive mechanism, it is possible to suppress magnetic interference between the lens drive mechanism and the runout correction drive mechanism. Therefore, it is possible to prevent the accuracy of runout correction and the accuracy of lens driving from being lowered due to magnetic interference.

In the present invention, the flexible printed circuit board includes a first folded portion that extends in the optical axis direction and is folded back once in the opposite direction, and the first folded portion is along a surface from which the flexible printed circuit board is pulled out. It is preferable that it extends in the optical axis direction. In this way, the flexible printed circuit board can be easily bent when the movable body swings. Therefore, the load applied to the flexible printed circuit board can be reduced.

In the present invention, the movable body includes the optical module and a holder frame surrounding the outer peripheral side of the optical module, and the first folded portion may be arranged in a gap between the optical module and the holder frame. preferable. In this way, the movement range of the first folded portion can be regulated by the optical module and the holder frame. Therefore, excessive deformation of the flexible printed circuit board can be suppressed.

According to the present invention, there is provided a runout correction drive mechanism that swings the movable body in two directions, one around the first axis and the other around the second axis that intersect each other. Therefore, it is possible to perform runout correction in two directions. Further, the runout correction drive mechanism is arranged on two of the four surfaces of the movable body. Therefore, the arrangement space of the runout correction drive mechanism can be reduced as compared with the case where the runout correction drive mechanism is arranged on all four surfaces. Therefore, the size of the optical unit with the runout correction function can be reduced. Further, of the four surfaces of the movable body, the runout correction drive mechanism is not arranged 2
The flexible printed circuit board is pulled out from one of the surfaces. Therefore, it is possible to secure a space for routing the flexible printed circuit board in the optical axis direction along the side surface of the movable body.

It is external perspective view of the optical unit with a runout correction function to which this invention was applied. It is an exploded perspective view seen from one side in the optical axis direction of the optical unit with a runout correction function of FIG. It is an exploded perspective view seen from the other side in the optical axis direction of the optical unit with a runout correction function of FIG. It is a top view of the optical unit with a runout correction function with a cover removed. It is a partial cross-sectional view (partial cross-sectional view of the AA position of FIG. 1) of the optical unit with a runout correction function of FIG. It is an exploded perspective view of the gimbal frame, the first thrust receiving member, and the second thrust receiving member. It is a partially enlarged sectional view of the optical unit with a runout correction function of FIG. It is a partial cross-sectional view of the optical unit with a runout correction function provided with the optical module of a modification.

Hereinafter, embodiments of the optical unit 1 with a runout correction function to which the present invention is applied will be described with reference to the drawings. In the present specification, the three axes of XYZ are axial directions orthogonal to each other, one side in the X-axis direction is indicated by + X, the other side is indicated by -X, one side in the Y-axis direction is indicated by + Y, and the other side is indicated by -Y. One side in the Z-axis direction is indicated by + Z, and the other side is indicated by −Z. The Z-axis direction coincides with the optical axis L direction of the optical module 2. Further, the + Z direction is one side (subject side) of the optical axis L direction, and the −Z direction is the other side (image side) of the optical axis L direction.

(overall structure)
FIG. 1 is a perspective view of an optical unit 1 with a runout correction function to which the present invention is applied. FIG. 2 is an exploded perspective view of the optical unit 1 with a runout correction function of FIG. 1 as viewed from one side (+ Z direction) of the optical axis L direction. FIG. 3 is an exploded perspective view of the optical unit 1 with a runout correction function of FIG. 1 as viewed from the other side (−Z direction) of the optical axis L direction. FIG. 4 is a plan view of the optical unit 1 with a runout correction function from which the first cover 51 is removed. FIG. 5 is a partial cross-sectional view of the optical unit 1 with a runout correction function of FIG. 1 (partial cross-sectional view of positions AA in FIG. 1). FIG. 6 is an exploded perspective view of the gimbal frame 9, the first thrust receiving member 44, and the second thrust receiving member 46.

As shown in FIG. 1, the optical unit 1 with a shake correction function has an optical module 2 provided with an optical element such as a lens. The optical unit 1 with a shake correction function is used, for example, in optical devices such as mobile phones with cameras and drive recorders, and optical devices such as action cameras and wearable cameras mounted on moving objects such as helmets, bicycles, and radiocon helicopters. .. In such an optical device, if the optical device shakes during shooting, the captured image is distorted. The optical unit 1 with a shake correction function corrects the tilt of the optical module 2 based on the acceleration, rotation speed, runout amount, etc. detected by a detection means such as a gyroscope in order to prevent the captured image from tilting.

As shown in FIGS. 1 to 5, the optical unit 1 with a runout correction function includes a movable body 3 on which the optical module 2 is mounted, a gimbal mechanism 4 that swingably supports the movable body 3, and a gimbal mechanism 4. The fixed body 5 that supports the movable body 3 via the fixed body 5, the runout correction drive mechanism 6 that swings the movable body 3 with respect to the fixed body 5, and the first flexible printed substrate 7 connected to the movable body 3 are fixed. A second flexible printed substrate 8 to be attached to the body 5 is provided. The first flexible printed circuit board 7 includes a connector portion provided at an end portion on the side opposite to the side connected to the movable body 3.
Further, the second flexible printed circuit board 8 includes a terminal portion provided at an end portion on the side opposite to the side attached to the fixed body 5.

The optical unit 1 with a runout correction function swings the movable body 3 around two axes (X-axis and Y-axis) that intersect the optical axis L (Z-axis) and intersect with each other to perform run-out correction. By performing runout correction around the X-axis and runout correction around the Y-axis, runout correction in the pitching (pitch) direction and yawing (rolling) direction are performed.

As shown in FIGS. 1 and 4, the movable body 3 is swingably supported by the gimbal mechanism 4 around the first axis R1 orthogonal to the optical axis L (Z axis), and the optical axis L and the third It is swingably supported around the second axis R2 orthogonal to the first axis R1. The first axis R1 and the second axis R2 are tilted 45 degrees with respect to the X-axis and the Y-axis. By combining the rotation around the first axis R1 and the rotation around the second axis R2, the movable body 3 can swing around the X-axis and the Y-axis. Therefore, the movable body 3 is swingably supported around the X-axis and the Y-axis by the gimbal mechanism 4.

As shown in FIG. 4, the gimbal mechanism 4 is located at a diagonal position on the second axis R2 of the fixed body 5 and a first fulcrum portion 41 provided at a diagonal position on the first axis R1 of the movable body 3. It includes a second fulcrum portion 42 provided and a gimbal frame 9. The gimbal frame 9 is a metal leaf spring, and is provided at two first support portions 901 provided at diagonal positions on the first axis R1 and diagonal positions on the second axis R2. It is provided with two second support portions 902. The gimbal mechanism 4 is assembled so that the first support portion 901 is in point contact with the first fulcrum portion 41 and the second support portion 902 is in point contact with the second fulcrum portion 42. As a result, the movable body 3 is swingably supported around the first axis R1 and swingably supported around the second axis R2 via the gimbal frame 9.

As shown in FIGS. 2 to 4, the runout correction drive mechanism 6 includes a first magnetic drive mechanism 6X that rotates the movable body 3 around the X axis and a second magnetic drive that rotates the movable body 3 around the Y axis. The mechanism 6Y is provided. In this embodiment, the first magnetic drive mechanism 6X and the second magnetic drive mechanism 6Y are arranged at one place, respectively.

The first magnetic drive mechanism 6X includes a set of magnets 61X and coils 62X. The second magnetic drive mechanism 6Y includes a set of magnets 61Y and coils 62Y. The magnet 61X and the coil 62X of the first magnetic drive mechanism 6X face each other in the Y-axis direction. The magnet 61Y and the coil 62Y of the second magnetic drive mechanism 6Y face each other in the X-axis direction. In this embodiment, the magnets 61X and 61Y are arranged on the movable body 3, and the coils 62X and 62Y are arranged on the fixed body 5. The arrangement of the magnets 61X and 61Y and the coils 62X and 62Y may be opposite to that of the present embodiment. That is, the magnets 61X and 61Y may be arranged on the fixed body 5, and the coils 62X and 62Y may be arranged on the movable body 3.

As shown in FIG. 4, the movable body 3 has a first surface 301 and a second surface 302 located on opposite sides of the optical axis L in the X-axis direction and opposite sides of the optical axis L in the Y-axis direction. It is provided with a third surface 303 and a fourth surface 304 located at. The runout correction drive mechanism 6 is arranged on one of the first surface 301 and the second surface 302, and on one of the third surface 303 and the fourth surface 304. In this embodiment, the second magnetic drive mechanism 6Y is arranged on the first surface 301 facing the + X direction. Further, the first magnetic drive mechanism 6X is arranged on the fourth surface 304 facing the −Y direction. By limiting the planes on which the runout correction drive mechanism 6 is arranged to two planes, the shape of the optical unit 1 with a runout correction function seen from the Z-axis (optical axis L) direction is miniaturized.

Further, the first flexible printed circuit board 7 connected to the movable body 3 is pulled out from the outer peripheral surface of the movable body 3 from which the runout correction drive mechanism 6 is not arranged. In this embodiment, the first flexible printed circuit board 7 is pulled out from the third surface 303 facing the + Y direction. By pulling out the first flexible printed circuit board 7 in the direction in which the runout correction drive mechanism 6 is not arranged, the first flexible printed circuit board 7 is routed in the Z-axis (optical axis L) direction along the side surface of the movable body 3. Can be done. In this embodiment, as will be described later, the first folded portion 71, which is obtained by bending the first flexible printed circuit board 7 in the + Z direction and folding it back once in the opposite direction, is arranged on the third surface 303, which is the side surface of the movable body 3 in the + Y direction. are doing. The first folded-back portion 71 extends in the optical axis L direction along the third surface 303 from which the first flexible printed circuit board 7 is pulled out.

(Movable body)
As shown in FIGS. 2 and 3, the movable body 3 includes an optical module 2 and a holder frame 30 for holding the optical module 2. The optical module 2 includes a housing 20 that is rectangular when viewed from the optical axis L direction, a substrate 25 that is arranged at the end of the housing 20 in the −Z direction, a tubular portion 26 that protrudes from the housing 20 in the + Z direction, and a tubular portion. It includes a lens group 2A (optical element) held by 26 and a lens driving mechanism 27 (see FIGS. 4 and 5) arranged inside the housing 20.

The lens driving mechanism 27 focuses on the subject by adjusting the lens position of the lens group 2A arranged in the L direction of the optical axis. In this embodiment, the lens drive mechanism 27 includes a magnetic drive mechanism. The lens drive mechanism 27 may include a drive source other than the magnetic drive mechanism. For example, a motor may be provided. The lens drive mechanism 27 is arranged on the opposite side of the first magnetic drive mechanism 6X or the second magnetic drive mechanism 6Y with the optical axis L interposed therebetween. In this embodiment, the lens drive mechanism 27 is arranged on the side opposite to the first magnetic drive mechanism 6X with the optical axis L interposed therebetween.

As shown in FIGS. 4 and 5, the center of gravity G of the optical module 2 is deviated from the optical axis L in the + Y direction on which the lens driving mechanism 27 is arranged. In this embodiment, as described above, the lens drive mechanism 27 is arranged on the side opposite to the first magnetic drive mechanism 6X with the optical axis L interposed therebetween. Therefore, the direction of the center of gravity shift due to the arrangement of the lens drive mechanism 27 The direction in which the center of gravity shifts due to the arrangement of the runout correction magnetic drive mechanism 6 is opposite.

The holder frame 30 is a frame-shaped member that surrounds the outer peripheral side of the optical module 2. The housing 20 includes a first side surface 21 facing the + X direction, a second side surface 22 facing the −X direction, a third side surface 23 facing the + Y direction, and a fourth side surface 24 facing the −Y direction. The holder frame 30 is along the first frame portion 31 along the first side surface 21 of the housing 20, the second frame portion 32 along the second side surface 22, the third frame portion 33 along the third side surface 23, and the fourth side surface 24. A fourth frame portion 34 is provided. The first frame portion 31, the second frame portion 32, and the fourth frame portion 34 are in contact with the housing 20. On the other hand, a gap S is provided between the third frame portion 33 and the third side surface 23 of the housing 20 (see FIG. 5). Further, the third frame portion 33 includes a notch portion 35 in which the end portion in the −Z direction is cut out in the + Z direction.

In the gap S provided between the third frame portion 33 and the third side surface 23 of the housing 20, the first folded portion 71 obtained by folding back the first flexible printed circuit board 7 is arranged. That is, the first folded-back portion 71 is arranged in the gap S provided inside the third surface 303 of the movable body 3. The first folded-back portion 71 extends in the Z-axis (optical axis L) direction along the third side surface 23, which is the side surface of the housing 20 in the + Y direction. The first flexible printed circuit board 7 is bent at a substantially right angle at the end of the first folded-back portion 71 in the −Z direction, is passed through a notch portion 35 provided in the third frame portion 33, and + Y of the holder frame 30. It is pulled out to the direction side.

As shown in FIGS. 2 and 3, the holder frame 30 includes a first fulcrum portion 41 of the gimbal mechanism 4. In the present embodiment, the inner surface of the corner portion connecting the second frame portion 32 and the third frame portion 33 and the inner surface of the corner portion connecting the first frame portion 31 and the fourth frame portion 34 are located at two locations, respectively. The first fulcrum portion 41 is provided. The first fulcrum portion 41 includes a recess 43 that is recessed outward in the radial direction, and a first thrust receiving member 44 that is arranged in the recess 43. As shown in FIG. 6, the first thrust receiving member 44 is substantially perpendicular to the plate-shaped first plate portion 441 extending in the Z-axis (optical axis L) direction and the end portion of the first plate portion 441 in the −Z direction. A second plate portion 442 that bends inward and extends inward in the radial direction, and a sphere 444 that is fixed from the inside in the radial direction to a through hole 443 that penetrates the first plate portion 441 are provided. When the second plate portion 442 abuts on the inner surface of the recess 43 provided in the holder frame 30 in the −Z direction in the Z axis (optical axis L) direction, the first fulcrum portion 41 is brought into contact with the Z axis (optical axis L). ) Positioned in the direction.

The first thrust receiving member 44 is made of metal, and the sphere 444 is fixed to the first plate portion 441 by welding. The sphere 444 makes point contact with the first support portion 901 provided on the gimbal frame 9. The first support portion 901 is a concave curved surface having a radius of curvature larger than the radius of the sphere 444, and elastically contacts the sphere 444 from the inside in the radial direction.

The holder frame 30 includes a first frame portion 31, a second frame portion 32, a third frame portion 33, and a convex portion 36 protruding from the end faces of the fourth frame portion 34 in the + Z direction. One convex portion 36 is provided at the center of the first frame portion 31 and the second frame portion 32 in the Y-axis direction, and one at the center of the third frame portion 33 and the fourth frame portion 34 in the X-axis direction. There is. The four convex portions 36 have the same protrusion height in the + Z direction. The convex portion 36 functions as a stopper that regulates the swing range around the first axis R1 and around the second axis R2 of the movable body 3. That is, when the movable body 3 swings around the first axis R1 and around the second axis R2, the swing range of the movable body 3 is regulated by the convex portion 36 hitting the fixed body 5. As will be described later, the fixed body 5 includes a first cover 51 that faces the outer peripheral portion of the movable body 3 in the Z-axis (optical axis L) direction. Therefore, when the convex portion 36 hits the first cover 51, the swing range of the movable body 3 is restricted.

The holder frame 30 includes a magnet 61X of the first magnetic drive mechanism 6X and a magnet placement recess 37 in which the magnet 61Y of the second magnetic drive mechanism 6Y is arranged. In this embodiment, the magnet placement recess 37 is formed in the first frame portion 31 and the fourth frame portion 34. The magnet placement recess 37 is recessed inward in the radial direction. In this embodiment, since the holder frame 30 is made of resin, the plate-shaped yoke member 63 is arranged in the magnet placement recess 37. The yoke member 63 is fixed to the inner surface of the magnet placement recess 37, and the magnets 61X and 61Y are fixed to the radial outer surface of the yoke member 63. The magnets 61X and 61Y are magnetized so that the magnets having a surface facing outward in the radial direction are differently magnetized with a magnetizing polarization line located substantially at the center in the Z-axis (optical axis L) direction as a boundary.

(Fixed point)
The fixed body 5 includes a case 50, a first cover 51 and a second cover 52 fixed to the case 50, and a wiring cover 53. In this embodiment, the case 50 is made of resin, and the first cover 51, the second cover 52, and the wiring cover 53 are made of non-magnetic metal. The case 50 includes an outer frame portion 50A that surrounds the outer peripheral side of the movable body 3 and a wiring accommodating portion 50B that protrudes in the + Y direction from the end portion of the outer frame portion 50A on the −Z direction side. The first cover 51 is fixed to the end of the outer frame portion 50A in the + Z direction. The second cover 52 is fixed to the ends of the outer frame portion 50A and the wiring accommodating portion 50B in the −Z direction. The wiring cover 53 is fixed to the end of the wiring accommodating portion 50B in the + Z direction.

Elastic engaging portions 58 are provided on the outer peripheral edges of the first cover 51, the second cover 52, and the wiring cover 53. Further, a claw portion 59 is provided on the outer peripheral surface of the case 50. The elastic engaging portion 58 is a metal piece extending in the Z-axis (optical axis L) direction, and has an opening into which the claw portion 59 fits. The claw portion 59 projects radially outward from the inner surface of the recess formed on the outer peripheral surface of the case 50. The first cover 51, the second cover 52, and the wiring cover 53 are fixed to the case 50 by engaging the elastic engaging portion 58 with the claw portion 59.

The first cover 51 is provided with two elastic engaging portions 58 extending in the Z direction at each of the edges in the three directions except the + Y direction. On the outer peripheral surface of the end portion of the outer frame portion 50A in the + Z direction, a claw portion 59 is provided at a position corresponding to each of the elastic engaging portions 58 provided on the first cover 51. The second cover 52 is provided with two elastic engaging portions 58 extending in the + Z direction at each of the edges in the four directions. Claws 59 are provided on the outer peripheral surfaces of the ends of the outer frame portion 50A and the wiring accommodating portion 50B in the −Z direction at positions corresponding to the elastic engaging portions 58 provided on the second cover 52. .. The wiring cover 53 is provided with two elastic engaging portions 58 extending in the −Z direction, respectively, on the edges in the two directions of the + X direction and the −X direction. A claw portion 59 is provided on the outer peripheral surface of the end portion of the wiring accommodating portion 50B in the + Z direction at a position corresponding to each of the elastic engaging portions 58 provided on the wiring cover 53.

The first cover 51 faces the outer peripheral portion of the movable body 3 arranged inside the outer frame portion 50A in the Z-axis direction, and restricts the movable body 3 from jumping out in the + Z direction. The first cover 51 includes a substantially rectangular opening 510. In this embodiment, a part of the gimbal frame 9 projects from the opening 510 in the + Z direction. Further, the tubular portion 26 of the optical module 2 projects in the + Z direction from the central hole 90 provided at the center in the radial direction of the gimbal frame 9. The first cover 51 is located at the end of the fixed body 5 in the + Z direction. Therefore, in this embodiment, a part of the optical module 2 and the gimbal frame 9 protrudes in the + Z direction from the end of the fixed body 5 in the + Z direction.

In the present embodiment, the first end portion 5A (see FIG. 5), which is the end portion of the fixed body 5 in the + Z direction, is the surface of the first cover 51 in the + Z direction. Further, as will be described later, the gimbal frame 9 includes a first frame portion 91 located in the + Z direction with respect to the first end portion 5A. The movable body 3 includes a tubular portion 26 which is a movable body protruding portion located in the + Z direction with respect to the first end portion 5A.

The outer frame portion 50A includes a first frame portion 501 and a second frame portion 502 extending parallel to the Y-axis direction on the + X direction side and the −X direction side of the movable body 3, and the + Y direction side and the −Y direction of the movable body 3. A third frame portion 503 and a fourth frame portion 504 extending parallel to the X-axis direction are provided on the side. The wiring accommodating portion 50B includes a fifth frame portion 505 and a sixth frame portion 506 extending parallel to the + Y direction from the ends of the first frame portion 501 and the second frame portion 502 in the −Z direction, and the fifth frame portion 505 and the fifth frame portion 505. A seventh frame portion 507 that is connected to the + Y direction end portion of the sixth frame portion 506 and extends in the X-axis direction is provided.

The outer frame portion 50A includes a second fulcrum portion 42 of the gimbal mechanism 4. In the present embodiment, the inner surface of the corner portion connecting the first frame portion 501 and the third frame portion 503 and the inner surface of the corner portion connecting the second frame portion 502 and the fourth frame portion 504 are located at two locations, respectively. A second fulcrum portion 42 is provided. The second fulcrum portion 42 includes a recess 45 recessed outward in the radial direction and a second thrust receiving member 46 arranged in the recess 45. As shown in FIG. 6, the second thrust receiving member 46 is bent substantially perpendicularly to the first plate portion 461 extending in the L direction of the optical axis and the end portion of the first plate portion 461 in the −Z direction to be inside in the radial direction. A second plate portion 462 extending to the side and a sphere 464 fixed from the inside in the radial direction to a through hole 463 penetrating the first plate portion 461 are provided. The second plate portion 462 abuts on the inner surface of the recess 45 provided in the outer frame portion 50A in the −Z direction in the Z axis (optical axis L) direction, so that the second fulcrum portion 42 is brought into contact with the Z axis (optical axis L). Positioned in the L) direction.

The second thrust receiving member 46 is made of metal, and the sphere 464 is fixed to the first plate portion 461 by welding. The sphere 464 makes point contact with the second support portion 902 provided on the gimbal frame 9. The second support portion 902 is a concave curved surface having a radius of curvature larger than the radius of the sphere 464, and elastically contacts the sphere 464 from the inside in the radial direction.

The outer frame portion 50A includes a coil 62X of the first magnetic drive mechanism 6X and a coil arrangement hole 54 in which the coil 62Y of the second magnetic drive mechanism 6Y is fixed by an adhesive or the like. In this form,
The coil arrangement hole 54 penetrates the first frame portion 501 and the fourth frame portion 504. The coils 62X and 62Y are oval air-core coils, and two long sides located on the + Z direction side and the −Z direction side are used as effective sides. The second flexible printed circuit board 8 is fixed to the outer frame portion 50A from the outside in the radial direction with respect to the first frame portion 501 and the fourth frame portion 504. The second flexible printed circuit board 8 has a first substrate portion 81 that overlaps the coil arrangement hole 54 of the fourth frame portion 504 from the outside in the radial direction and a radial outer side with respect to the coil arrangement hole 54 of the first frame portion 501. A second substrate portion 82 that overlaps with the above is provided.

A rectangular magnetic plate 64 is arranged between the first substrate portion 81 and the coil 62X, and between the second substrate portion 82 and the coil 62Y, respectively. The magnetic plate 64 arranged between the first substrate portion 81 and the coil 62X faces the magnet 61X, and provides a magnetic spring for returning the movable body 3 to the reference rotation position in the rotation direction around the X axis. It is configured. Further, the magnetic plate 64 arranged between the second substrate portion 82 and the coil 62Y faces the magnet 61Y, and is magnetic for returning the movable body 3 to the reference rotation position in the rotation direction around the Y axis. It constitutes a spring.

The magnetic plate 64 is provided with a rectangular through hole at a position overlapping the center holes of the coils 62X and 62Y, and the magnetic sensor 65 is arranged in the through hole. The magnetic sensor 65 is, for example, a Hall element. The optical unit 1 with a runout correction function detects the swing angle of the movable body 3 around the X axis from the output of the magnetic sensor 65 arranged at the center of the coil 62X. Further, the swing angle of the movable body 3 around the Y axis is detected from the output of the magnetic sensor 65 arranged at the center of the coil 62Y.

(Gimbal frame)
As shown in FIG. 6, the gimbal frame 9 is bent substantially at right angles from the first frame portion 91, which is substantially square when viewed from the Z-axis direction, and the four corner portions of the first frame portion 91, in the −Z direction. A second frame portion 92 that extends is provided. The second frame portion 92 is arranged at the first diagonal position on both sides of the first frame portion 91 in the first axis R1 direction and at the second diagonal position on both sides of the first frame portion 91 in the second axis R2 direction. Will be done. A central hole 90 penetrating the first frame portion 91 is provided in the center of the first frame portion 91. As shown in FIG. 5, the first frame portion 91 overlaps with the housing 20 and the holder frame 30 of the optical module 2 when viewed from the Z-axis (optical axis L) direction.

The first frame portion 91 includes a square rectangular portion 910 whose diagonal directions are the first axis R1 direction and the second axis R2 direction when viewed from the Z-axis (optical axis L) direction, and the first axis R1 of the rectangular portion 910. It includes a first protruding portion 913 protruding radially outward from both corners in the direction, and a second protruding portion 914 protruding radially outward from both corners of the rectangular portion 910 in the second axis R2 direction. As shown in FIG. 4, the first frame portion 91 is located in the direction of the second axis R2 among the four corner portions (first protruding portion 913 and second protruding portion 914) connected to the second frame portion 92. Except for the second protruding portion 914 arranged at the corner, the holder frame 30 is located on the inner peripheral side when viewed from the Z-axis (optical axis L) direction.

As shown in FIGS. 1 and 6, in the rectangular portion 910 of the first frame portion 91, the central portion 911 located at the center in the second axis R2 direction is recessed in the −Z direction, and both ends in the second axis R2 direction. The corner portion 912 of is located on the + Z direction side from the central portion 911. That is, in the first frame portion 91, the corner portion 912 in the second axis R2 direction is separated from the movable body 3 by the central portion 911. Therefore, the movable body 3 swings around the first axis R1 on the −Z direction side of the gimbal frame 9, and both ends of the movable body 3 in the second axis R2 direction (in this embodiment, in the second axis R2 direction of the housing 20). Even when the corner portion) moves in the Z-axis direction, the collision between the movable body 3 and the gimbal frame 9 can be avoided.

Further, the central portion 911 extends to the corner portion of the first frame portion 91 in the first axis R1 direction. Here, the corner portion of the first frame portion 91 in the direction of the first axis R1 swings around the second axis R2 around the second fulcrum portion 42 when the movable body 3 swings around the second axis R2. This is the portion where the gimbal frame 9 moves most in the Z-axis (optical axis L) direction. In this way, when the corner portion of the first frame portion 91 in the first axis R1 direction has a shape that is most recessed in the −Z direction, the operating space of the gimbal frame 9 when the movable body 3 swings is Z. It can be made smaller in the axis (optical axis L) direction. Therefore, the required height in the Z-axis (optical axis L) direction of the space for installing the optical unit 1 with the runout correction function can be reduced.

The second frame portion 92 includes an extension portion 93 for a first support portion provided at two corners on the first axis R1 of the gimbal frame 9 and two locations on the second axis R2 of the gimbal frame 9. An extension portion 94 for a second support portion provided at a corner portion is provided. The extension portion 93 for the first support portion extends linearly in the −Z direction from the first projecting portion 913 provided at the corner portion of the first frame portion 91 in the direction of the first axis R1. A first support portion 901, which is a concave curved surface recessed inward in the radial direction, is formed by press working at the tip portion of the extension portion 93 for the first support portion. The extension portion 94 for the second support portion includes the first portion 941 extending in the −Z direction from the second protruding portion 914 provided at the corner portion of the first frame portion 91 in the second axis R2 direction, and the first portion 941. It includes a second portion 942 that bends substantially at a right angle and extends outward in the radial direction, and a third portion 943 that bends substantially at a right angle from the second portion 942 and extends in the −Z direction. At the tip of the third portion 943, a second support portion 902, which is a concave curved surface recessed inward in the radial direction, is formed by press working.

The extension portion 93 for the first support portion is arranged in the notch portion 511 in which the corner portion in the opening 510 of the first cover 51 in the direction of the first axis R1 is cut out radially outward. A first fulcrum portion 41, which is a fulcrum portion of the gimbal mechanism 4 provided on the movable body 3 side, is arranged on the −Z direction side of the notch portion 511, and the tip of the extension portion 93 for the first support portion 93. The portion is supported by the first fulcrum portion 41. Further, the extension portion 94 for the second support portion is arranged in the cutout portion 512 in which the corner portion in the second axis R2 direction in the opening 510 of the first cover 51 is cut out radially outward. A second fulcrum 42, which is a fulcrum of the gimbal mechanism 4 provided on the fixed body 5 side, is arranged on the −Z direction side of the notch 512, and is the tip of the extension 94 for the second support. The portion is supported by the second fulcrum portion 42.

The extension portion 93 for the first support portion and the extension portion 94 for the second support portion are elastically deformed in the radial direction. Therefore, the first support portion 901 provided at the tip end portion of the extension portion 93 for the first support portion elastically contacts the sphere 444 provided at the first fulcrum portion 41. Further, the second support portion 902 provided at the tip end portion of the extension portion 94 for the second support portion elastically contacts the sphere 464 provided at the second fulcrum portion 42. As a result, the extension portion 93 for the first support portion and the extension portion 94 for the second support portion are less likely to come off from the first fulcrum portion 41 and the second fulcrum portion 42, and the shake of the fulcrum portion is suppressed. ..

(Roading shape of the first flexible printed circuit board 7)
The first flexible printed circuit board 7 is folded back once inside the holder frame 30 to form the first folded portion 71, and then is pulled out from the notch portion 35 of the holder frame 30 in the + Y direction, and is pulled out in the outer frame portion 50A. It is folded back and extends inward of the wiring accommodating portion 50B from the notch portion 508 notched in the + Z direction at the end portion of the third frame portion 503 in the outer frame portion 50A in the −Z direction. The first flexible printed circuit board 7 has a second folded-back portion 72 extending in the + Y direction inside the wiring accommodating portion 50B and folded back once in the opposite direction, and a third folded-back portion 72 overlapping the + Z direction side of the second folded-back portion 72. 73 is provided.

The wiring cover 53 includes a notch portion 531 having a substantially center of the edge in the −Y direction cut out in the + Y direction. The third folded-back portion 73 of the first flexible printed circuit board 7 is pulled out from the notch portion 531 to the outside of the wiring accommodating portion 50B, and extends in the + Y direction along the wiring cover 53. The first flexible printed circuit board 7 includes a fixing portion 74 fixed to the wiring cover 53. The fixing portion 74 is fixed to the edge of the notch portion 531.

The first flexible printed circuit board 7 includes a flexible substrate 70 and a reinforcing plate 75 fixed to the flexible substrate 70. The reinforcing plate 75 is arranged at three locations: a first folded portion 71, a second folded portion 72, and a fixed portion 74. In the first folded-back portion 71 and the second folded-back portion 72, the reinforcing plate 75 is arranged between the bent portions of the flexible substrate 70 bent in the opposite direction. Therefore, the reinforcing plate 75 is sandwiched between the flexible substrates 70 and functions as a spacer. The reinforcing plate 75 provided on the fixing portion 74 is arranged between the wiring cover 53 and the flexible substrate 70, and functions as a spacer between the wiring cover 53 and the flexible substrate 70.

FIG. 7 is a partially enlarged cross-sectional view of the optical unit 1 with a runout correction function of FIG. 1, and is an enlarged view of a portion from which the first flexible printed circuit board 7 is pulled out. As described above, the movable body 3 is provided with a radial gap S between the third side surface 23 of the optical module 2 and the third frame portion 33 of the holder frame 30, and the first folded portion is provided in this gap S. 71 is arranged. The third frame portion 33 of the holder frame 30 includes a convex portion 39 projecting toward the optical module 2 side (−Y direction), and is between the tip surface of the convex portion 39 and the third side surface 23 of the optical module 2. The first folded portion 71 is arranged.

The first flexible printed substrate 7 includes a pull-out portion 76 that is pulled out from the movable body 3 in the + Y direction, and the first folded-back portion 71 is bent from the pull-out portion 76 toward the front side (+ Z direction) in the optical axis L direction. From the first extending portion 711 extending in the + Y direction of the first extending portion 711, the second extending portion 712 extending in the rear side (−Z direction) of the optical axis L direction, and the first extending portion 711. A bent portion 713 that extends in a shape that bends in the opposite direction and is connected to the second extending portion 712 is provided. The first extending portion 711 is fixed to the third side surface 23 of the optical module 2 by the double-sided tape 77. It can also be fixed with an adhesive instead of the double-sided tape 77.

The reinforcing plate 75 arranged in the first folded-back portion 71 is located between the first extending portion 711 and the second extending portion 712, at a position closest to the bending portion 713 in the optical axis L direction (the position closest to the + Z direction). ) Is placed. Therefore, the first folded-back portion 71 can be easily bent because the portion of the second extending portion 712 extending from the reinforcing plate 75 in the −Z direction is not fixed to another member. Therefore, the load applied to the first flexible printed circuit board 7 when the movable body 3 swings around the X axis is small.

Further, since the first flexible printed circuit board 7 includes a second folded portion 72 extending in the Y-axis direction inside the wiring accommodating portion 50B in addition to the first folded portion 71, the movable body 3 moves around the Y axis. The second folded-back portion 72 can be easily bent when swinging. Therefore, the load applied to the first flexible printed circuit board 7 is small.

(Main action and effect of this form)
As described above, the optical unit 1 with the runout correction function of the present embodiment swingably supports the movable body 3 provided with the optical module 2 and the movable body 3 around the first axis R1 intersecting the optical axis L. At the same time, the gimbal mechanism 4 which is a swing support mechanism for swingably supporting the movable body 3 around the second axis R2 intersecting the optical axis L and the first axis R1, and the movable body 3 via the gimbal mechanism 4. It has a fixed body 5 to support, a runout correction drive mechanism 6 for swinging the movable body 3 around the first axis R1 and around the second axis R2, and a first flexible printed substrate 7 connected to the movable body 3. The movable body 3 has a first surface 301 and a second surface 302 located on opposite sides of the optical axis L in the first direction (X-axis direction) intersecting the optical axis L, and the optical axis L and the first direction (the optical axis L and the first direction). It includes a third surface 303 and a fourth surface 304 located on opposite sides of the optical axis L in a second direction (Y-axis direction) intersecting the X-axis direction. The runout correction drive mechanism 6 is arranged on one of the first surface 301 and the second surface 302, and on one of the third surface 303 and the fourth surface 304. In this embodiment, the first surface 301 and the fourth surface 30
A runout correction drive mechanism 6 is arranged at 4. Further, of the two surfaces on which the runout correction drive mechanism 6 is not arranged, the first flexible printed circuit board 7 is pulled out from the third surface 303.

In this embodiment, since the runout correction drive mechanism 6 for swinging the movable body 3 in two directions, that is, around the first axis R1 and around the second axis R2 that intersect each other is provided, the runout correction in two directions is provided. It can be performed. Further, the runout correction drive mechanism 6 is arranged on two of the four surfaces of the movable body 3 that intersect each other. Therefore, the arrangement space of the runout correction drive mechanism 6 can be reduced as compared with the case where the runout correction drive mechanism 6 is arranged on all four surfaces. Therefore, the size of the optical unit 1 with the runout correction function can be reduced. Further, the first flexible printed circuit board 7 is pulled out from one of the four surfaces of the movable body 3 on which the runout correction drive mechanism 6 is not arranged. Therefore, it is possible to secure a space for routing the first flexible printed circuit board 7 along the side surface of the movable body 3 in the optical axis L direction.

The arrangement of the runout correction drive mechanism 6 is not limited to the above arrangement. For example, the first magnetic drive mechanism 6X can be arranged on the second surface 302 instead of the first surface 301. Further, when the runout correction drive mechanism 6 is arranged on the first surface 301 and the fourth surface 304 as described above, the first flexible printed circuit board 7 can be pulled out from the second surface 302. In this case, the wiring accommodating portion 50B is arranged in the −X direction of the outer frame portion 50A.

In the present embodiment, the first flexible printed circuit board 7 includes a first folded portion 71 that extends in the L direction of the optical axis and is folded back once in the opposite direction, and the first flexible printed circuit board is pulled out from the first folded portion 71. It extends along the surface in the L direction of the optical axis. Therefore, when the movable body swings, the first folded-back portion 71 can be easily bent, so that the load applied to the first flexible printed circuit board 7 can be reduced.

In the present embodiment, the first folded portion 71 of the first flexible printed circuit board 7 is arranged in the gap S between the third side surface 23 of the optical module 2 and the third frame portion 33 of the holder frame 30. Therefore, since the movement range of the first folded-back portion 71 can be regulated by the optical module 2 and the holder frame, excessive deformation of the first flexible printed circuit board 7 can be suppressed.

In this embodiment, the center of gravity G of the optical module 2 is deviated from the optical axis L, and the runout correction drive mechanism 6 is arranged on the side opposite to the side where the center of gravity G of the optical module 2 is located with respect to the optical axis L. It is preferable to be done. In this way, the center of gravity G of the movable body 3 can be brought closer to the optical axis L. Therefore, the impact resistance can be improved. Further, since the runout correction can be performed with a small torque, the runout correction drive mechanism 6 can be miniaturized. In addition, power consumption can be reduced.

In the present embodiment, the optical module 2 preferably includes a lens and a lens driving mechanism 27, and the lens driving mechanism 27 is preferably arranged on the opposite side of the shake correction driving mechanism 6 and the optical axis L with the optical axis L interposed therebetween. In this way, the direction in which the center of gravity shifts due to the arrangement of the lens drive mechanism 27 and the direction in which the center of gravity shifts due to the arrangement of the runout correction drive mechanism 6 become opposite directions. Therefore, the center of gravity of the movable body 3 can be brought closer to the optical axis L. Therefore, the impact resistance can be improved. Further, since the runout correction can be performed with a small torque, the runout correction drive mechanism 6 can be miniaturized. In addition, power consumption can be reduced.

In this embodiment, the lens drive mechanism 27 is a magnetic drive mechanism. By arranging the lens drive mechanism 27 and the runout correction drive mechanism 6 on opposite sides of the optical axis L, even if the lens drive mechanism 27 is a magnetic drive mechanism, the lens drive mechanism 27 and the runout correction drive mechanism Magnetic interference with 6 can be suppressed. Therefore, it is possible to prevent the accuracy of runout correction and the accuracy of lens driving from being lowered due to magnetic interference.

(Modification example)
FIG. 8 is a partial cross-sectional view of an optical unit 11 with a runout correction function including the optical module 12 of the modified example. In the above embodiment, the optical module 2 is symmetrical in the Y-axis direction with the optical axis L as the center. However, in the optical unit 11 with the runout correction function of the modified example, as shown in FIG. The module is asymmetrical in the Y-axis direction with the axis L as the center. In the form shown in FIG. 8, since the optical module 12 is not a square when viewed from the optical axis L direction but a rectangle long in the + Y direction, the center of gravity G of the optical module 12 is deviated from the optical axis L in the + Y direction. Therefore, when the first magnetic drive mechanism 6X is arranged on the surface of the movable body 13 in the −Y direction, the center of gravity G of the optical module 12 and the first magnetic drive mechanism 6X are located on the opposite sides of the optical axis L. Therefore, the center of gravity of the movable body 13 can be brought closer to the optical axis L.

1, 11 ... Optical unit with runout correction function, 2, 12 ... Optical module, 2A ... Lens group, 3, 13 ... Movable body, 4 ... Gimbal mechanism, 5 ... Fixed body, 5A ... First end, 6 ... Runout Correction drive mechanism, 6X ... 1st magnetic drive mechanism, 6Y ... 2nd magnetic drive mechanism, 7 ... 1st flexible printed board, 8 ... 2nd flexible printed board, 9 ... gimbal frame, 20 ... housing, 21 ... 1st Side surface, 22 ... 2nd side surface, 23 ... 3rd side surface, 24 ... 4th side surface, 25 ... board, 26 ... cylinder part, 27 ... lens drive mechanism, 30 ... holder frame, 31 ... 1st frame part, 32 ... 2 frame part, 33 ... 3rd frame part, 34 ... 4th frame part, 35 ... notch part, 36 ... convex part, 37 ... concave part for magnet placement, 39 ... convex part, 41 ... 1st fulcrum part, 42 ... 2nd fulcrum part, 43 ... recess, 44 ... first thrust receiving member, 45 ... recess, 46 ... second thrust receiving member, 50 ... case, 50A ... outer frame part, 50B ... wiring housing part, 51 ... first cover , 52 ... 2nd cover, 53 ... Wiring cover, 54 ... Coil placement hole, 58 ... Elastic engagement part, 59 ... Claw part, 61X, 61Y ... Magnet, 62X, 62Y ... Coil, 63 ... York member, 64 ... Magnetic Plate, 65 ... Magnetic sensor, 70 ... Flexible substrate, 71 ... 1st folded part, 72 ... 2nd folded part, 73 ... 3rd folded part, 74 ... Fixed part, 75 ... Reinforcing plate, 76 ... Drawer part, 77 ... Double-sided tape, 81 ... First substrate portion, 82 ... Second substrate portion, 90 ... Center hole, 91 ... First frame portion, 92 ... Second frame portion, 93 ... Extension portion for first support portion, 94 ... 2nd support extension, 100 ... portable device, 101 ... cover glass, 102 ... fixing cushioning material, 301 ... 1st surface, 302 ... 2nd surface, 303 ... 3rd surface, 304 ... 4th surface , 441 ... 1st plate, 442 ... 2nd plate, 443 ... through hole, 444 ... sphere, 461 ... 1st plate, 462 ... 2nd plate, 463 ... through hole, 464 ... sphere, 501 ... 1 frame part, 502 ... 2nd frame part, 503 ... 3rd frame part, 504 ... 4th frame part, 505 ... 5th frame part, 506 ... 6th frame part, 507 ... 7th frame part, 508 ... notch Part, 510 ... Opening, 511, 512 ... Notch, 513 ... Notch, 711 ... First extension, 712 ... Second extension, 713 ... Third extension, 901 ... First support Part, 902 ... Second support part, 910 ... Rectangular part, 911 ... Central part, 912 ... Corner part, 913 ... First protruding part, 914 ... Second protruding part, 941 ... First part, 942 ... Second part, 943 ... Third part, G ... Center of gravity of optical module, L ... Optical axis, R1 ... 1st axis, R2 ... 2nd axis, S ... Gap

Claims (6)

A movable body with an optical module and
A rocking that swingably supports the movable body around the first axis that intersects the optical axis and swingably supports the movable body around the second axis that intersects the optical axis and the first axis. Support mechanism and
A fixed body that supports the movable body via the swing support mechanism, and
A runout correction drive mechanism that swings the movable body around the first axis and around the second axis, and
It has a flexible printed circuit board connected to the movable body, and has
The movable body has a first surface and a second surface located on opposite sides of the optical axis in a first direction intersecting the optical axis, and a second direction intersecting the optical axis and the first direction. It has a third surface and a fourth surface located on opposite sides of the optical axis.
The runout correction drive mechanism is arranged at one of the first surface and the second surface, and one of the third surface and the fourth surface.
The flexible printed circuit board is pulled out from one of the first surface, the second surface, the third surface, and the fourth surface, of which the runout correction drive mechanism is not arranged. An optical unit with a runout correction function that features. The center of gravity of the optical module is deviated from the optical axis.
The optical unit with a runout correction function according to claim 1, wherein a runout correction drive mechanism is arranged on a side opposite to the side where the center of gravity of the optical module is located with respect to the optical axis. The optical module includes a lens and a lens drive mechanism.
The optical unit with a shake correction function according to claim 1 or 2, wherein the lens drive mechanism is arranged on the opposite side of the shake correction drive mechanism with the optical axis interposed therebetween. The optical unit with a shake correction function according to claim 3, wherein the lens drive mechanism is a magnetic drive mechanism. The flexible printed circuit board includes a first folded portion that extends in the optical axis direction and is folded back once in the opposite direction.
The optical with a runout correction function according to any one of claims 1 to 4, wherein the first folded portion extends in the optical axis direction along a surface from which the flexible printed circuit board is drawn out. unit. The movable body includes the optical module and a holder frame that surrounds the outer peripheral side of the optical module.
The optical unit with a runout correction function according to claim 5, wherein the first folded portion is arranged in a gap between the optical module and the holder frame.

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