Tremor correction function-attached optical unit

Abstract

To make a tremor correction by spinning a reflection member, and reduce distortion of images.SOLUTION: A tremor correction function-attached optical unit has: a first oscillation support mechanism that supports oscillatably a reflection member around a first axis along a reflection surface; an intermediate movable body that supports the reflection member via a first oscillation support mechanism; a first drive mechanism; a second oscillation support mechanism that supports oscillatably the intermediate movable body around a second axis; a support body that supports the intermediate movable body via the second oscillation support mechanism; a second oscillation drive mechanism; a lens unit upon which light reflected by the reflection surface is incident; an image-capturing substrate that has an image-capturing element the light passing through the lens unit enters mounted; a rolling support mechanism that supports rotatably the image-capturing substrate around the second axis; and a rolling drive mechanism that causes the image-capturing substrate to rotate around the second axis, in which the image-capturing substrate is supported via the rolling support mechanism.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to an optical unit with a shake correction function that corrects shake by rotating a reflecting member that reflects incident light. [Background technology]

[0002] Some optical units mounted on mobile terminals and mobile objects use a reflective member that reflects incident light and bends the optical path toward a camera module equipped with a lens and an image sensor (periscope system). In periscope-type optical units, the reflective member is swung to correct shake in order to suppress distortion of captured images when the mobile terminal or mobile object is moving. Patent Document 1 describes this type of optical unit with shake correction function.

[0003] The optical unit with shake correction function in Patent Document 1 includes a reflector with a mirror that reflects incident light, a substrate on which an image sensor is mounted and onto which the light reflected by the reflector is incident via a lens unit, a housing that supports the reflector and substrate so that they can be swung, and a reflector swing mechanism that swings the reflector about a yaw axis and a pitch axis relative to the housing. Furthermore, it includes a substrate swing mechanism that swings the substrate about a roll axis relative to the housing, and performs roll correction in addition to pitch and yaw correction. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-27431 Summary of the Invention [Problem to be solved by the invention]

[0005] Conventionally, rolling correction of optical units has been performed using electronic image stabilization (EIS), which corrects captured images through image processing, or by mechanical methods that move the substrate on which the imaging element is mounted or the optical components. However, EIS methods have the problem of degrading image quality. The optical unit with shake correction function described in Patent Document 1 performs rolling correction using a mechanical method, so image processing does not degrade image quality. However, even with a mechanical method, image distortion and image quality degradation can occur if the optical system is moved in a way that causes distortion. For example, if a reflective component is supported so as to move independently in two directions, pitch and yaw, relative to the substrate on which the imaging element is mounted, image distortion may occur.

[0006] In view of the above, an object of the present invention is to provide an optical unit with a periscope-type shake correction function that performs shake correction by rotating a reflective member, which performs shake correction in three directions and reduces degradation of image quality due to image distortion. [Means for solving the problem]

[0007] In order to solve the above problems, one aspect of an optical unit with shake correction function according to the present invention includes a reflecting member having a reflecting surface, a first swing support mechanism that supports the reflecting member so that it can swing about a first axis along the reflecting surface, an intermediate movable body that supports the reflecting member via the first swing support mechanism, a first swing drive mechanism that swings the reflecting member relative to the intermediate movable body about the first axis, a second swing support mechanism that supports the intermediate movable body so that it can swing about a second axis that intersects the first axis and intersects the direction of incidence of light onto the reflecting member, a support body that supports the intermediate movable body via the second swing support mechanism, and a second swing drive mechanism that swings the intermediate movable body relative to the support body about the second axis. The imaging device has a lens unit onto which light reflected by the reflecting surface is incident, an imaging board mounted with an imaging element onto which light that has passed through the lens unit is incident, a rolling support mechanism that supports the imaging board rotatably around the second axis, and a rolling drive mechanism that rotates the imaging board around the second axis, and the imaging board is supported by the intermediate movable body via the rolling support mechanism. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a plan view of an optical unit with a shake correction function. [Figure 2] FIG. 2 is an explanatory diagram of the optical system of the optical unit with a shake correction function. [Figure 3] FIG. 3 is an exploded perspective view of the optical unit with a shake correction function. [Figure 4] FIG. 4 is a cross-sectional view of the optical unit with shake correction function cut along the XY plane. [Figure 5] FIG. 5 is a cross-sectional view of the optical unit with shake correction function cut along the XZ plane. [Figure 6] FIG. 6 is an exploded perspective view of the intermediate movable body, the reflecting member, and the camera module as viewed from the Z1 direction. [Figure 7] FIG. 7 is an exploded perspective view of the intermediate movable body, the reflecting member, and the camera module as viewed from the Z2 direction. [Figure 8] FIG. 8 is a cross-sectional view of an optical unit with shake correction function including a rolling drive mechanism according to a modified example, cut along the XY plane. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of an optical unit with a shake correction function will be described with reference to the drawings.

[0010] (Overall composition) FIG. 1 is a plan view of the optical unit 1 with shake correction function. FIG. 2 is an explanatory diagram of the optical system of the optical unit 1 with shake correction function. FIG. 3 is an exploded perspective view of the optical unit 1 with shake correction function. FIG. 4 is a cross-sectional view of the optical unit 1 with shake correction function cut along the XY plane. FIG. 5 is a cross-sectional view of the optical unit 1 with shake correction function cut along the XZ plane. FIG. 6 is an exploded perspective view of the intermediate movable body 4, the reflecting member 3, and the camera module 2 as viewed from the Z1 direction. FIG. 7 is an exploded perspective view of the intermediate movable body 4, the reflecting member 3, and the camera module 2 as viewed from the Z2 direction.

[0011] In the following description, the three mutually perpendicular directions are referred to as the X direction, Y direction, and Z direction. One side of the X direction is referred to as the X1 direction, and the other side of the X direction is referred to as the X2 direction. One side of the Y direction is referred to as the Y1 direction, and the other side of the Y direction is referred to as the Y2 direction. One side of the Z direction is referred to as the Z1 direction, and the other side of the Z direction is referred to as the Z2 direction.

[0012] As shown in Figures 1, 3, and 4, the optical unit 1 with shake correction function includes a camera module 2, a reflecting member 3, an intermediate movable body 4, and a support body 5. The optical axis direction of the camera module 2 coincides with the X direction. The reflecting member 3 is supported by the intermediate movable body 4 so as to be swingable around a first axis R1 along the Y direction. The intermediate movable body 4 is supported by the support body 5 so as to be swingable around a second axis R2 along the X direction. In this embodiment, the second axis R2 coincides with the optical axis of the camera module 2. The camera module 2 is supported by the intermediate movable body 4 so as to be rotatable around the second axis R2.

[0013] The optical unit 1 with shake correction function is used in optical devices such as camera-equipped mobile phones and drive recorders, as well as optical devices such as action cameras and wearable cameras mounted on moving objects such as helmets, bicycles, drones and radio-controlled helicopters. In such optical devices, if the optical device shakes during shooting, the captured image will be distorted. In order to prevent the captured image from being tilted, the optical unit 1 with shake correction function corrects the vibration of the optical device based on the acceleration, angular velocity, amount of shake, etc. detected by detection means such as a gyroscope. The reflecting member 3 and the camera module 2 are rotated in a direction that cancels out the difference.

[0014] 2 is an explanatory diagram of the optical system of the optical unit 1 with shake correction function. The camera module 2 includes a lens unit 21 and an imaging board 22. The reflecting member 3, lens unit 21, and imaging board 22 are aligned in the X direction. The lens unit 21 includes at least one lens. The optical axis of the lens unit 21 coincides with the second axis R2. The imaging board 22 is equipped with an imaging element 23 that is disposed on the optical axis of the lens unit 21 (i.e., on the second axis R2). The reflecting member 3 is a triangular prism extending in the Y direction, and includes a reflecting surface 30 that is inclined with respect to the XY plane and the XZ plane.

[0015] The reflecting member 3 has a first surface 31 along the XY plane and a second surface 32 along the YZ plane. The first surface 31 is an incident surface. In this embodiment, the first surface 31 faces the Z1 direction. The second surface 32 is an exit surface that emits reflected light from the reflecting surface 30 and faces the lens unit 21. In this embodiment, the second surface 32 faces the X1 direction. Incident light that enters the optical unit 1 with shake correction function passes through a first optical path L1 that enters the first surface 31 of the reflecting member 3 and heads toward the reflecting surface 30, a second optical path L2 that passes from the reflecting surface 30 via the second surface 32 and heads toward the lens unit 21, and then enters the image sensor 23. The first optical path L1 is an optical path that runs along the Z direction. The second optical path L2 is an optical path that runs along the X direction.

[0016] As shown in Fig. 3, the reflecting member 3 is held by a holder 33. The holder 33 includes a pair of holder end plates 34, 35 facing each other in the Y direction, and a reflecting member fixing portion 36 provided between the pair of holder end plates 34, 35. The reflecting member fixing portion 36 is an inclined surface that slopes toward the Z2 direction as it extends toward the X1 direction. The reflecting member 3 is held in a recess surrounded by the pair of holder end plates 34, 35 and the reflecting member fixing portion 36.

[0017] The optical unit 1 with shake correction function includes a first swing support mechanism 6 that supports the reflecting member 3 via a holder 33, a second swing support mechanism 7 that supports the intermediate movable body 4, and a rolling support mechanism 8 that supports the camera module 2 including the imaging board 22. The optical unit 1 with shake correction function performs shake correction in the pitching direction, yawing direction, and rolling direction. In this embodiment, shake correction in the pitching direction is performed by swinging the reflecting member 3 about a first axis R1 along the reflecting surface 30. Shake correction in the yawing direction is performed by swinging the reflecting member 3 about a second axis R2 that intersects the first axis R1 and the Z direction, which is the direction of incidence of light on the reflecting surface 30. Furthermore, the optical unit 1 with shake correction function performs shake correction in the rolling direction by rotating the imaging board 22 relative to the reflecting member 3 about the second axis R2.

[0018] The first swing support mechanism 6 connects the holder 33 and the intermediate movable body 4. Therefore, the reflecting member 3 and the holder 33 are supported by the intermediate movable body 4 via the first swing support mechanism 6 so as to be swingable about the first axis R1. In this embodiment, shake correction in the pitching direction is performed by swinging the reflecting member 3 and the holder 33 relative to the intermediate movable body 4 about the first axis R1.

[0019] The second swing support mechanism 7 connects the intermediate movable body 4 and the support body 5. Therefore, the intermediate movable body 4, together with the reflecting member 3, the holder 33, and the camera module 2, is supported by the support body 5 via the first swing support mechanism 6 so as to be swingable around the second axis R2. In this embodiment, shake correction in the yawing direction is performed by swinging all of the reflecting member 3, the holder 33, the camera module 2, and the intermediate movable body 4 relative to the support body 5 around the second axis R2.

[0020] The rolling support mechanism 8 connects the camera module 2 and the intermediate movable body 4. In this embodiment, shake correction in the rolling direction is performed by rotating the entire camera module 2 including the imaging board 22 and lens unit 21 relative to the intermediate movable body 4 and reflecting member 3 around the second axis R2.

[0021] The optical unit 1 with shake correction function includes a first swing drive mechanism 11 for performing shake correction in the pitching direction, a second swing drive mechanism 12 for performing shake correction in the yawing direction, and a rolling drive mechanism 13 for performing shake correction in the rolling direction. In this embodiment, the first swing drive mechanism 11, the second swing drive mechanism 12, and the rolling drive mechanism 13 are each a magnetic drive mechanism.

[0022] (holder) As shown in Figures 3, 6, and 7, the reflecting member 3 is held by a holder 33. The holder 33 includes a pair of holder end plates 34, 35 facing each other in the Y direction, and a reflecting member fixing portion 36 provided between the pair of holder end plates 34, 35. The reflecting member fixing portion 36 is an inclined surface that slopes toward the Z2 direction as it extends toward the X1 direction. The reflecting member 3 is held in a recess surrounded by the holder end plates 34, 35 and the reflecting member fixing portion 36.

[0023] (Intermediate movable body) The intermediate movable body 4 is a frame-shaped member that surrounds the outer periphery of the holder 33 and the camera module 2. The intermediate movable body 4 includes a pair of side plates 41, 42 that extend in the X direction on both sides of the holder 33 in the Y direction, an end plate 43 that extends in the Y direction in the X2 direction of the holder 33 and has both ends connected to the side plates 41, 42, and a pair of partition plates 44, 45 that protrude from the X1 direction ends of the pair of side plates 41, 42 toward the center of the intermediate movable body 4 in the Y direction. Furthermore, the intermediate movable body 4 includes a pair of side plates 46, 47 that extend in the X1 direction from the pair of partition plates 44, 45, respectively, and are arranged on both sides of the camera module 2 in the Y direction, and an end plate 48 that extends in the Y direction in the X1 direction of the camera module 2 and has both ends connected to the side plates 46, 47.

[0024] The pair of partition plates 44, 45 are disposed between the reflecting member 3 and the camera module 2. An opening 49 is provided between the pair of partition plates 44, 45, through which light traveling from the reflecting member 3 toward the lens unit 21 passes.

[0025] (Support) The support body 5 is a frame-shaped member that surrounds the outer periphery of the intermediate movable body 4. The support body 5 includes a pair of side plates 51, 52 that extend in the X direction on both sides of the intermediate movable body 4 in the Y direction, and a pair of end plates 53, 54 that extend in the Y direction on both sides of the intermediate movable body 4 in the X direction and have both ends connected to the side plates 51, 52. The support body 5 further includes a coil holding plate 55 that extends in the Y direction inside the X2-direction end plate 54, and a connection part 56 that extends in the X1 direction from the Z2-direction end of the end plate 54 and is connected to the coil holding plate 55.

[0026] 5, when the intermediate movable body 4 is placed inside the support body 5, the connection portion 56 passes through the end plate 43 of the intermediate movable body 4 in the Z2 direction, and the coil holding plate 55 is placed inside the intermediate movable body 4. As shown in FIG. 1, the end plate 54 placed at the end of the support body 5 in the X1 direction has a notch 57 for drawing out the flexible printed circuit board 9, which is connected to the imaging board 22 of the camera module 2 and extends in the X direction along the side surface of the intermediate movable body 4 in the Y1 direction, to the outside.

[0027] (First swing support mechanism) 4, the first swing support mechanism 6 includes a pair of spring bearings 61 disposed at both ends of the holder 33 in the Y direction, and a pair of spring members 64 disposed on a pair of side plates 41, 42 of the intermediate movable body 4. The spring bearings 61 each include a metal sphere 62 and a spring member 64 fixed to the center of the sphere 62. The holder includes a metal sphere fixing plate 63. The sphere fixing plate 63 is fixed to recesses provided on the Y1-direction side surface of the holder end plate 34 and the Y2-direction side surface of the holder end plate 35. As shown in Figure 3, the holder end plates 34 and 35 are provided with an arc-shaped recess 60 that extends in an arc shape around the first axis R1 at a position in the Z2 direction of the sphere fixing plate 63.

[0028] The pair of spring members 64 are attached to recesses provided on inner surfaces of a pair of side plates 41, 42 facing each other in the Y direction in the intermediate movable body 4. The spring member 64 includes a plate portion 65 parallel to the XZ plane, a bent portion 66 bent in the Y direction from the Z2-direction end of the plate portion 65, a spring portion 67 bent in the Z1 direction from the bent portion 66, and a hook portion 68 bent from the tip of the spring portion 67 to the side opposite the plate portion 65. The spring portion 67 is elastically deformable in the Y direction relative to the plate portion 65. The spring portion 67 has a concave curved surface 69 recessed toward the plate portion 65.

[0029] The first swing support mechanism 6 is assembled so that the spheres 62 of the spring bearing portions 61 and the concave curved surfaces 69 of the spring members 64 are in point contact on the first axis R1 on both sides of the holder 33 in the Y direction. The spring members 64 are assembled in a state in which the spring portions 67 are bent toward the plate portions 65, and therefore the concave curved surfaces 69 are pressed against the spheres 62 by the elastic force of the spring members 64. As a result, the holder 33 and the reflecting member 3 are supported so as to be swingable about the first axis R1 relative to the intermediate movable body 4. The hook portions 68 of the spring members 64 are disposed in the arc-shaped recesses 60 provided in the holder end plates 34, 35.

[0030] (Second swing support mechanism) The second swing support mechanism 7 includes a pair of spring bearings 71 disposed at both ends of the intermediate movable body 4 in the X direction, and a pair of spring members 74 disposed on a pair of end plates 53, 54 of the support body 5. The spring bearings 71 include a metal sphere 72 and a metal sphere fixing plate 73 to which the sphere 72 is fixed at the center. The sphere fixing plate 73 is fixed to recesses provided on the side surface of the end plate 43 facing the X2 direction and the side surface of the end plate 48 facing the X1 direction. As shown in FIGS. 3 and 5, the end plates 43, 48 of the intermediate movable body 4 have an arc-shaped recess 70 extending in an arc shape centered on the second axis R2 at a position in the Z2 direction on the sphere fixing plate 73.

[0031] The pair of spring members 74 are attached to recesses provided on the inner surfaces of the end plates 53, 54 of the support body 5. The spring member 74 includes a plate portion 75 parallel to the YZ plane, a bent portion 76 bent in the X direction from the Z2-direction end of the plate portion 75, a spring portion 77 bent in the Z1 direction from the bent portion 76, and a hook portion 78 bent from the tip of the spring portion 77 to the side opposite the plate portion 75. The spring portion 77 is elastically deformable in the X direction relative to the plate portion 75. The spring portion 77 has a concave curved surface 79 recessed toward the plate portion 75 side.

[0032] The second swing support mechanism 7 is assembled so that the spheres 72 of the spring bearing portions 71 and the concave surfaces 79 of the spring members 74 are in point contact on the second axis R2 on both sides of the intermediate movable body 4 in the X direction. The spring members 74 are assembled in a state in which the spring portions 77 are bent toward the plate portions 75, and therefore the concave surfaces 79 are pressed against the spheres 72 by the elastic force of the spring members 74. As a result, the intermediate movable body 4, together with the reflecting member 3 and the camera module 2, is supported relative to the support body 5 so as to be swingable about the second axis R2. The hook portions 78 of the spring members 74 are disposed in arc-shaped recesses 70 provided in the end plates 43, 48 of the intermediate movable body 4.

[0033] (First swing drive mechanism) The first swing drive mechanism 11 includes a first magnet 11M attached via a magnetic plate 14 to a recess provided on the side surface of the holder 33 in the X2 direction, and a first coil 11C facing the first magnet 11M in the X direction. The magnetic plate 14 functions as a yoke for the first magnet 11M. The first coil 11C is fixed to a coil holding plate 55 arranged between the end plate 43 of the intermediate movable body 4 and the holder 33. The first magnet 11M is polarized in the Z direction. The first coil 11C is It is an oval air-core coil that is long in the Y direction. Therefore, when electricity is applied to the first coil 11C, a driving force acts on the holder 33 and the reflecting member 3 in the rotation direction about the first axis R1.

[0034] (Second swing drive mechanism) The second oscillation drive mechanism 12 includes a second magnet 12M attached to the Y2-direction side surface of the intermediate movable body 4, and a second coil 12C facing the second magnet 12M in the Y direction. As shown in FIG. 4, the second magnet 12M is fixed to the outer surface of the side plate 47 of the intermediate movable body 4. The second coil 12C is fixed to the inner surface of the Y2-direction side plate 52 of the support body 5. The second magnet 12M is polarized in the Z direction. The second coil 12C is an oval-shaped air-core coil that is elongated in the X direction. Therefore, when current is applied to the second coil 12C, a driving force acts on the intermediate movable body 4 in a rotational direction around the second axis R2.

[0035] (rolling support mechanism) The rolling support mechanism 8 includes a spring bearing portion 81 arranged at the X1-direction end of the camera module 2, a spring member 84 arranged on an end plate 48 provided at the X1-direction end of the intermediate movable body 4, and a biasing mechanism 90 arranged at the X2-direction end of the camera module 2. The biasing mechanism 90 biases the entire camera module 2 in the X2 direction. The spring bearing portion 81 includes a metal sphere 82 and a metal sphere fixing plate 83 to the center of which the sphere 82 is fixed.

[0036] As shown in FIGS. 4, 5, 6, and 7, the camera module 2 includes a rectangular parallelepiped case 24 that houses the lens unit 21, and a spring bearing support member 25 that overlaps the imaging board 22, which is fixed to the X1-direction end of the case 24, from the X1 side. In this embodiment, the tip of the lens barrel of the lens unit 21 protrudes from the X2-direction end face of the case 24 toward the reflecting member 3. The spring bearing support member 25 includes a mounting plate 26 that overlaps the imaging board 22 from the X1 direction, a support plate 27 that is positioned parallel to the mounting plate 26 and spaced apart from the mounting plate 26 in the X1 direction, and a connection portion 28 that protrudes in the X1 direction from the center of the Y-direction at the Z1-direction end of the mounting plate 26 and is connected to the support plate 27. As shown in FIGS. 4 and 5, a sphere fixing plate 83 is fixed to the X2-direction side face of the support plate 27.

[0037] The spring member 84 of the rolling support mechanism 8 is attached to a recess provided on the inner surface of the end plate 48. The spring member 84 includes a plate portion 85 parallel to the YZ plane, a bent portion 86 bent in the X2 direction from the Z2-direction end of the plate portion 85, and a spring portion 87 bent in the Z1 direction from the bent portion 86. The spring portion 87 is elastically deformable in the X direction relative to the plate portion 85. The spring portion 87 has a concave curved surface 89 that is recessed on the side opposite to the plate portion 85. The rolling support mechanism 8 is assembled on the X1 side of the camera module 2 so that the sphere 82 of the spring receiving portion 81 and the concave curved surface 89 of the spring member 84 are in point contact on the second axis R2.

[0038] The biasing mechanism 90 is disposed between the X2-direction end face of the camera module 2 and a pair of partition plates 44, 45 of the intermediate movable body 4. The biasing mechanism 90 includes two pairs of biasing magnets 91 and magnetic members 92 facing each other in the X direction. In this embodiment, a biasing magnet 91 is fixed to each of the pair of partition plates 44, 45, and a magnetic member 92 is disposed on the X2-direction end face of the case 24 of the camera module 2. Each biasing magnet 91 attracts the magnetic member 92 in the X2 direction, thereby biasing the camera module 2 in the X2 direction. The rolling support mechanism 8 is assembled such that the sphere 82 presses against the concave curved surface 89 due to the biasing force in the X2 direction applied to the camera module 2 and the elastic force of the spring portion 87. As a result, the camera module 2 is supported relative to the intermediate movable body 4 so as to be swingable about the second axis R2.

[0039] (Rolling drive mechanism) The rolling drive mechanism 13 is a third magnet arranged at the end of the camera module 2 in the X1 direction. The camera module 2 includes two pairs of third magnets 13M and third coils 13C facing the third magnets 13M in the X direction. As shown in FIG. 4, the two third magnets 13M are fixed to a mounting plate 26 disposed at the end of the camera module 2 in the X1 direction. The third coil 13C is fixed to the inner surface of the end plate 48 of the intermediate movable body 4. The two pairs of third magnets 13M and third coils 13C are disposed at two locations, the Y1 side and the Y2 side of the second axis R1. Both third magnets 13M are polarized in the Z direction, but the magnetization directions of the two third magnets 13M are opposite in the Z direction. That is, one third magnet 13M has an S pole on the Z1 side and an N pole on the Z2 side, while the other third magnet 13M has an N pole on the Z1 side and an S pole on the Z2 side. As a result, in the rolling drive mechanism 13, the two pairs of third magnets 13M and third coils 13C generate drive forces in the same rotation direction around the second axis R2.

[0040] (Main effects of this embodiment) As described above, the optical unit 1 with shake correction function of this embodiment includes the reflecting member 3 having the reflecting surface 30, the first swing support mechanism 6 that supports the reflecting member 3 so that it can swing about the first axis R1 along the reflecting surface 30, the intermediate movable body 4 that supports the reflecting member 3 via the first swing support mechanism 6, the first swing drive mechanism 11 that swings the reflecting member 3 relative to the intermediate movable body 4 about the first axis R1, the second swing support mechanism 7 that supports the intermediate movable body 4 so that it can swing about the second axis R2 that intersects with the first axis R1 and intersects with the direction of incidence of light to the reflecting member 3, and the second swing drive mechanism 11. The camera includes a support body 5 that supports the intermediate movable body 4 via a swing support mechanism 7, a second swing drive mechanism 12 that swings the intermediate movable body 4 relative to the support body 5 about a second axis R2, a camera module 2 that includes a lens unit 21 onto which light reflected by the reflecting surface 30 is incident and an imaging board 22 on which an imaging element is mounted onto which light that has passed through the lens unit 21 is incident, a rolling support mechanism 8 that supports the camera module 2 rotatably about the second axis R2, and a rolling drive mechanism 13 that rotates the camera module 2 about the second axis R2. The imaging board 22 mounted on the camera module 2 is supported by the intermediate movable body 4 via the rolling support mechanism 8.

[0041] In this embodiment, pitch correction is performed by rotating the reflecting member 3 around the first axis R1, yaw correction is performed by rotating the intermediate movable body 4 that holds the reflecting member 3 around the second axis R2, and roll correction is performed by rotating the imaging board 22 around the second axis R2. Therefore, shake correction in all three directions is performed by mechanical correction rather than image processing, which avoids image degradation that occurs when shake correction is performed by image processing. Furthermore, in this embodiment, the camera module 2 including the imaging board 22 and lens unit 21 is mounted on the intermediate movable body 4 rather than the support body 5. Therefore, when yaw correction is performed, the reflecting member 3, camera module 2, and intermediate movable body 4 rotate together. Therefore, the positional relationship between the reflecting member 3 and the imaging board 22 does not change, so distortion in the optical system and image degradation do not occur. Therefore, even with a configuration that can perform shake correction in three directions, image degradation due to image distortion can be reduced.

[0042] The rolling support mechanism 8 of this embodiment includes a spring member 84 arranged in the X1 direction, which is one side in the direction along the second axis R2, with respect to the camera module 2; a spring bearing portion 81 that makes point contact with the spring member 84 on the second axis R2; and a biasing mechanism 90 arranged in the X2 direction, which is the other side in the direction along the second axis R2, with respect to the camera module 2. The spring bearing portion 81 is arranged in the camera module 2, and the spring member 84 is arranged in the intermediate movable body 4. The biasing mechanism 90 includes a biasing magnet 91 and a magnetic member 92 that face each other in the direction along the second axis R2, with one of the biasing magnet 91 and the magnetic member 92 being arranged in the camera module 2, and the other of the biasing magnet 91 and the magnetic member 92 being arranged in the intermediate movable body 4. In this way, by combining the biasing mechanism 90 that attracts the camera module 2 by magnetic force with the mechanism (the spring receiving portion 81 and the spring member 84) that makes point contact on the second axis R2 that coincides with the optical axis of the camera module 2, it is possible to configure the rolling support mechanism 8 so that it does not block the path of light incident on the lens unit 21. .

[0043] In the rolling support mechanism 8, the positions of the spring member 84 and the spring receiving portion 81 may be reversed. That is, the spring receiving portion 81 may be disposed in the intermediate movable body 4, and the spring member 84 may be disposed in the camera module 2. In addition, in the biasing mechanism 90, the positions of the biasing magnet 91 and the magnetic member 92 may be reversed. That is, the biasing magnet 91 may be disposed in the camera module 2, and the magnetic member 92 may be disposed in the intermediate movable body 4.

[0044] In this embodiment, the first swing support mechanism 6, the second swing support mechanism 7, and the rolling support mechanism 8 are configured so that the spheres arranged in the spring bearing portions come into point contact with the concave curved surfaces of the spring members, but the arrangement of the spheres and the concave curved surfaces may be reversed. Also, instead of the spheres, it is possible to use members with convex curved surfaces that come into point contact with the concave curved surfaces.

[0045] The rolling drive mechanism 13 of this embodiment includes two pairs of third magnets 13M and third coils 13C facing each other in the X direction along the second axis R2. The two pairs of third magnets 13M and third coils 13C are arranged on both sides of the second axis R2 in the Y direction intersecting the second axis R2. One third magnet 13M and the other third magnet 13M of the two pairs have different magnetization directions. For example, one third magnet 13M of the two pairs has a south pole in the Z1 direction and a north pole in the Z2 direction, while the other third magnet 13M of the two pairs has a north pole in the Z1 direction and a south pole in the Z2 direction. In each of the two pairs, the third magnet 13M is arranged on the camera module 2 and the third coil 13C is arranged on the intermediate movable body 4. In this manner, the two pairs of third magnets 13M and third coils 13C can generate driving forces in the same rotational direction around the second axis R2.

[0046] The arrangement of the third magnet 13M and the third coil 13C may be reversed in the rolling drive mechanism 13. That is, the third magnet 13M may be arranged in the intermediate movable body 4, and the third coil 13C may be arranged in the camera module 2. Furthermore, the arrangement of the magnet and the coil in the first swing drive mechanism 11 and the second swing drive mechanism 12 may also be reversed.

[0047] (Variation) FIG. 8 is a cross-sectional view of an optical unit 1A with shake correction function, including a modified rolling drive mechanism 113, cut along the XY plane. In the example shown in FIG. 8, the rolling drive mechanism 113 is disposed between the Y1-direction side surface of the camera module 2 and the side plate 46 of the intermediate movable body 4. The rolling drive mechanism 113 includes a pair of a third magnet 113M and a third coil 113C that face each other in the Y direction intersecting with the second axis R2. The third magnet 113M is disposed on the camera module 2, and the third coil 113C is disposed on the intermediate movable body 4. In this manner, the rolling drive mechanism 113 can be configured using a single pair of magnet and coil, thereby reducing the number of components. Note that, as with the above embodiment, the rolling drive mechanism 13 may have the third magnet 13M and the third coil 13C disposed in reverse.

[0048] (Other embodiments) (1) In the above embodiment, the imaging board 22 and the lens unit 21 constitute the camera module 2. Therefore, when performing rolling correction, not only the imaging board 22 but the entire camera module 2 rotates around the second axis R2. However, the imaging board 22 may be separated from the lens unit 21, and only the imaging board 22 may be rotated when performing rolling correction. In this case, the lens unit 21 is fixed to the intermediate movable body 4. Therefore, the rolling drive mechanism 13 rotates the imaging board 22 relative to the lens unit 21 and the intermediate movable body 4.

[0049] That is, the optical unit 1 with shake correction function includes a lens unit 21 onto which light reflected by the reflecting surface 30 is incident, an imaging board 22 on which an imaging element 23 onto which light passing through the lens unit 21 is incident, and a support that supports the imaging board 22 rotatably around a second axis R2. The imaging device may include a rolling support mechanism 8 and a rolling drive mechanism 13 that rotates the imaging substrate 22 about the second axis R2. The imaging substrate 22 may be supported by the intermediate movable body 4 via the rolling support mechanism 8.

[0050] (2) The first swing drive mechanism 11, the second swing drive mechanism 12, and the rolling drive mechanism 13 are not limited to magnetic drive mechanisms, and other types of drive mechanisms may be used.

[0051] (summary) A summary of this disclosure is provided below. (1) a reflecting member having a reflecting surface; a first swing support mechanism that supports the reflecting member so that the reflecting member can swing about a first axis along the reflecting surface, and an intermediate movable body that supports the reflecting member via the first swing support mechanism; a first swing drive mechanism that swings the reflecting member relative to the intermediate movable body about the first axis; a second swing support mechanism that supports the intermediate movable body so that the intermediate movable body can swing about a second axis that intersects with the first axis and intersects with the direction of incidence of light onto the reflecting member, and a support that supports the intermediate movable body via the second swing support mechanism; a second swing drive mechanism that swings the intermediate movable body relative to the support body about the second axis; a lens unit into which the light reflected by the reflecting surface is incident; an imaging substrate on which an imaging element is mounted, onto which light that has passed through the lens unit is incident; a rolling support mechanism that supports the imaging substrate rotatably around the second axis; a rolling drive mechanism that rotates the imaging substrate around the second axis, The imaging substrate is supported by the intermediate movable body via the rolling support mechanism.

[0052] (2) the lens unit and the imaging board are disposed in a camera module; the camera module is supported by the intermediate movable body via the rolling support mechanism; The optical unit with shake correction function described in (1) above is characterized in that the rolling drive mechanism rotates the camera module around the second axis.

[0053] (3) The rolling support mechanism includes: a spring member disposed on one side of the camera module in a direction along the second axis, and a spring bearing portion that comes into point contact with the spring member on the second axis; a biasing mechanism that is disposed on the other side of the camera module in a direction along the second axis, one of the spring member and the spring receiving portion is disposed on the camera module, and the other of the spring member and the spring receiving portion is disposed on the intermediate movable body; the biasing mechanism includes a biasing magnet and a magnetic member that face each other in a direction along the second axis, The optical unit with shake correction function described in (2) above, characterized in that one of the biasing magnet and the magnetic member is arranged in the camera module, and the other of the biasing magnet and the magnetic member is arranged in the intermediate movable body.

[0054] (4) the lens unit is fixed to the intermediate movable body, The rolling drive mechanism drives the lens unit and the intermediate movable body to The optical unit with shake correction function according to (1) above, characterized in that the image substrate is rotated.

[0055] (5) the rolling drive mechanism includes two pairs of magnets and coils facing each other in a direction along the second axis; the two pairs are arranged on both sides of the second axis in a direction intersecting the second axis, The magnets provided in one of the two pairs and the magnets provided in the other of the two pairs have opposite magnetization directions, one of the magnet and the coil is fixed to the imaging substrate; The optical unit with shake correction function according to any one of (1) to (4) above, wherein the other of the magnet and the coil is fixed to the intermediate movable body.

[0056] (6) the rolling drive mechanism includes a pair of a magnet and a coil facing each other in a direction intersecting the second axis, one of the magnet and the coil is fixed to the imaging substrate; The optical unit with shake correction function according to any one of (1) to (4) above, wherein the other of the magnet and the coil is fixed to the intermediate movable body. [Explanation of symbols]

[0057] REFERENCE SIGNS LIST 1, 1A... optical unit with shake correction function, 2... camera module, 3... reflective member, 4... intermediate movable body, 5... support, 6... first swing support mechanism, 7... second swing support mechanism, 8... rolling support mechanism, 9... flexible printed circuit board, 11... first swing drive mechanism, 11C... first coil, 11M... first magnet, 12... second swing drive mechanism, 12C... second coil, 12M... second magnet, 13... rolling drive mechanism, 13C... third coil, 13M... third magnet, 14... magnetic plate, 21... lens unit, 22... imaging board, 23... imaging element, 24... case, 25... spring receiver support member, 26... mounting plate portion, 27... support plate portion, 28... connection portion, 30... reflective surface, 31... first surface, 32... second surface, 33... holder, 34, 35... holder end plate, 36... reflecting surface Firing member fixing portion, 41, 42... side plate, 43... end plate, 44, 45... partition plate, 46, 47... side plate, 48... end plate, 49... opening, 51, 52... side plate, 53, 54... end plate, 55... coil holding plate, 56... connection portion, 57... notch portion, 60, 70... arc-shaped recess, 61, 71, 81... spring receiving portion, 62, 72, 82... sphere, 63, 73, 83... sphere fixing plate, 64, 74, 8 4...spring member, 65, 75, 85...plate portion, 66, 76, 86...bent portion, 67, 77, 87...spring portion, 68, 78...hook portion, 69, 79, 89...concave curved surface, 90...biasing mechanism, 91...biasing magnet, 92...magnetic member, 113C...third coil, 113...rolling drive mechanism, 113M...third magnet, L1...first optical path, L2...second optical path, R1...first axis, R2...second axis

Claims

1. a reflecting member having a reflecting surface; a first swing support mechanism that supports the reflecting member so that the reflecting member can swing about a first axis along the reflecting surface, and an intermediate movable body that supports the reflecting member via the first swing support mechanism; a first swing drive mechanism that swings the reflecting member relative to the intermediate movable body about the first axis; a second swing support mechanism that supports the intermediate movable body so that the intermediate movable body can swing about a second axis that intersects with the first axis and intersects with the direction of incidence of light onto the reflecting member, and a support that supports the intermediate movable body via the second swing support mechanism; a second swing drive mechanism that swings the intermediate movable body relative to the support body about the second axis; a lens unit into which the light reflected by the reflecting surface is incident; an imaging substrate on which an imaging element is mounted, onto which light that has passed through the lens unit is incident; a rolling support mechanism that supports the imaging substrate rotatably around the second axis; a rolling drive mechanism that rotates the imaging substrate around the second axis, The imaging substrate is supported by the intermediate movable body via the rolling support mechanism.

2. the lens unit and the imaging board are disposed in a camera module; the camera module is supported by the intermediate movable body via the rolling support mechanism; 2. The optical unit with shake correction function according to claim 1, wherein the rolling drive mechanism rotates the camera module around the second axis.

3. The rolling support mechanism includes: a spring member disposed on one side of the camera module in a direction along the second axis, and a spring bearing portion that comes into point contact with the spring member on the second axis; a biasing mechanism that is disposed on the other side of the camera module in a direction along the second axis, one of the spring member and the spring receiving portion is disposed on the camera module, and the other of the spring member and the spring receiving portion is disposed on the intermediate movable body; the biasing mechanism includes a biasing magnet and a magnetic member that face each other in a direction along the second axis, 3. The optical unit with shake correction function according to claim 2, wherein one of the biasing magnet and the magnetic member is arranged on the camera module, and the other of the biasing magnet and the magnetic member is arranged on the intermediate movable body.

4. the lens unit is fixed to the intermediate movable body, 2. The optical unit with shake correction function according to claim 1, wherein the rolling drive mechanism rotates the imaging board relative to the lens unit and the intermediate movable body.

5. the rolling drive mechanism includes two pairs of magnets and coils facing each other in a direction along the second axis; the two pairs are arranged on both sides of the second axis in a direction intersecting the second axis, The magnets provided in one of the two pairs and the magnets provided in the other of the two pairs have opposite magnetization directions, one of the magnet and the coil is fixed to the imaging substrate; 2. The optical unit with shake correction function according to claim 1, wherein the other of the magnet and the coil is fixed to the intermediate movable body.

6. the rolling drive mechanism includes a pair of a magnet and a coil facing each other in a direction intersecting the second axis, one of the magnet and the coil is fixed to the imaging substrate; 2. The optical unit with shake correction function according to claim 1, wherein the other of the magnet and the coil is fixed to the intermediate movable body.

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