JP2022103549A - Optical unit having runout correction function - Google Patents

Abstract

To provide an optical unit having a runout correction function capable of reducing a thickness in an optical axis direction.SOLUTION: An optical unit 1 having a runout correction function includes: a movable body 5 including a camera module 4; a gimbal mechanism 7; and a fixed body 8 that supports the movable body 5 via the gimbal mechanism 7. The fixed body 8 includes: a resin case 13 including a frame part 16 that surrounds an outer peripheral side of the movable body 5; and a metal base 15 that is fixed to the frame part 16 from the Z-direction. The metal base 15 includes: a first frame-shaped metal plate 51 that includes an opening 50; and a second metal plate 52 that fits inside the opening 50. In the first metal plate 51, an edge 57 of the opening 50 overhangs an inner circumference side of the frame 16, and the edge 57 overlaps with the movable body 5 in an optical axis direction.SELECTED DRAWING: Figure 4

Description

The present invention relates to an optical unit with a shake correction function that swings a movable body provided with a camera module to correct shake.

In the optical unit mounted on the mobile terminal or mobile body, in order to suppress the disturbance of the captured image when the mobile terminal or mobile body is moved, the movable body on which the camera module is mounted is placed around the optical axis or around the optical axis. , Some swing around the axis that intersects the optical axis. Patent Document 1 describes this kind of optical unit with a shake correction function.

The optical unit with a shake correction function of Patent Document 1 rotatably supports a movable body including a camera module (optical module), a fixed body, and a movable body with respect to the fixed body around a rotation axis intersecting an optical axis. It has a gimbal mechanism. The fixed body is made of a resin case that surrounds the outer peripheral side of the movable body, a first metal cover that is fixed to the end of the case on the subject side, and a metal that is fixed to the end of the case on the opposite side of the subject. The base (second cover) is provided.

In Patent Document 1, the bottom of the resin case has a shape provided with a stopper portion that regulates the movable body from popping out of the case. The stopper portion is an overhanging portion that projects from the end portion on the opposite side of the side wall (frame portion) having a hole for holding the coil of the magnetic drive mechanism to the inner peripheral side. The second cover overlaps the stopper portion from the side opposite to the subject.

JP-A-2020-160371

Since the case surrounding the outer peripheral side of the movable body has a complicated shape including a hole for holding a coil and a recess for fitting a flexible printed substrate, it is easy to manufacture if it is made of resin. On the other hand, the thickness of the resin component required to secure the strength is larger than that of the metal. In the configuration in which the stopper portion is integrally formed with the resin case, there is a limit even if the thickness of the stopper portion is to be reduced. Therefore, there is a limit to reducing the product height in the optical axis direction of the optical unit with the shake correction function.

In view of these points, an object of the present invention is to reduce the thickness of the optical unit with a shake correction function in the optical axis direction.

In order to solve the above problems, the optical unit with a shake correction function of the present invention can swing a movable body provided with a camera module and the movable body around a first axis intersecting the optical axis of the camera module. A swing support mechanism that swingably supports the movable body around a second axis that intersects the optical axis and the first axis, and supports the movable body via the swing support mechanism. The fixed body is made of a resin case provided with a frame portion surrounding the outer peripheral side of the movable body, and is made of metal fixed to the frame portion from the side opposite to the subject in the optical axis direction. The base comprises a frame-shaped first metal plate having an opening and a second metal plate fitted inside the opening, wherein the first metal plate comprises the opening. The edge portion of the portion projects toward the inner peripheral side of the frame portion, and the edge portion overlaps the movable body in the optical axis direction.

According to the present invention, the metal base fixed to the resin case from the anti-subject includes a first metal plate having an opening and a second metal plate fitted inside the opening. The edge of the opening in the first metal plate overlaps the movable body in the optical axis direction. Therefore, since the first metal plate functions as a stopper portion that regulates the movement of the movable body in the optical axis direction, it is not necessary to form the stopper portion on the resin component. Therefore, the height of the stopper portion in the optical axis direction can be lowered, and the optical unit with the shake correction function can be made thinner in the optical axis direction.

Further, according to the present invention, since the first metal plate has an opening, a movable body is formed by attaching the first metal plate to the case to form a stopper mechanism and then inserting parts from the opening to the inside of the case. Can be assembled. Further, since the second metal plate that closes the opening is fitted inside the opening, the base can be made to have the thickness of one metal plate, and the thickness of the base can be reduced. Therefore, it is possible to reduce the thickness of the optical unit with the shake correction function in the optical axis direction.

In the present invention, it is preferable that one of the first metal plate and the frame portion is provided with a protrusion that is press-fitted into the other of the first metal plate and the frame portion. In this way, the fixing strength of the base to the case can be increased.

In the present invention, the movable body includes a holder for holding the camera module, the swing support mechanism is a gimbal mechanism for connecting the holder and the fixed body, and the camera module is in the optical axis direction. It is preferable that it is located inside the opening when viewed from the viewpoint. In this way, the intermediate product in which the case and the holder are connected by a gimbal mechanism and the first metal plate is attached to the case is provided with a stopper mechanism for the movable body. Therefore, in the intermediate inspection, the gap between the first metal plate and the holder can be confirmed, and the dimensional accuracy of the stopper mechanism can be confirmed. Then, after the intermediate inspection, the camera module can be attached to the holder through the opening to complete the optical unit with the shake correction function.

In the present invention, the movable body has a runout correction magnetic drive mechanism that swings around the first axis and the second axis, and the runout correction magnetic drive mechanism is a coil arranged on the fixed body. And the magnet provided in the movable body, the frame portion includes a coil fixing hole in which a coil is arranged, and a recess in which a flexible printed substrate connected to the coil is arranged. In this way, the coil and the flexible printed circuit board can be easily fixed and positioned. Since the frame portion is a resin component, it can be easily manufactured into a shape having a coil fixing hole and a recess.

According to the present invention, the metal base fixed to the resin case from the anti-subject includes a first metal plate having an opening and a second metal plate fitted inside the opening. 1 The edge of the opening in the metal plate overlaps the movable body in the optical axis direction. Therefore, since the first metal plate functions as a stopper portion that regulates the movement of the movable body in the optical axis direction, it is not necessary to form the stopper portion on the resin component. Therefore, the height of the stopper portion in the optical axis direction can be lowered. Further, since the second metal plate that closes the opening is fitted inside the opening, the base can be made to have the thickness of one metal plate, and the thickness of the base can be reduced. Therefore, it is possible to reduce the thickness of the optical unit with the shake correction function in the optical axis direction.

It is a perspective view of the optical unit with a runout correction function. It is an exploded perspective view of the optical unit with a runout correction function. It is a top view of the optical unit with a runout correction function with a cover removed from the subject side. It is sectional drawing of the optical unit with a runout correction function cut at the position AA of FIG. It is sectional drawing of the optical unit with a runout correction function cut at the BB position of FIG. It is an exploded perspective view of a frame part and a base. It is a top view which looked at the frame part and the base from the subject side. It is an exploded perspective view of a holder and a camera module. It is a top view which looked at the frame part which attached the 1st metal plate from the anti-subject side.

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

(overall structure)
FIG. 1 is a perspective view of an optical unit 1 with a runout correction function. FIG. 2 is an exploded perspective view of the optical unit 1 with a runout correction function. FIG. 3 is a plan view of the optical unit 1 with a shake correction function from which the cover is removed when viewed from the optical axis direction. FIG. 4 is a cross-sectional view and a partially enlarged view of the optical unit with a shake correction function cut at the positions AA of FIG. FIG. 5 is a cross-sectional view and a partially enlarged view of the optical unit with a shake correction function cut at the position BB of FIG.

The optical unit 1 with a shake correction function has a camera module 4 including a lens 2 and an image pickup element 3 (see FIGS. 4 and 5). The optical unit 1 with a shake correction function is used, for example, in an optical device such as a mobile phone with a camera and a drive recorder, and an optical device such as an action camera and a wearable camera mounted on a moving body such as a helmet, a bicycle, and a radio-controlled helicopter. .. 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 movable body based on the acceleration, the angular velocity, the amount of runout, etc. detected by a detection means such as a gyroscope in order to prevent the captured image from tilting.

In the optical unit 1 with a shake correction function of the present embodiment, the camera module 4 is rotated around the first axis R1 orthogonal to the optical axis L and around the second axis R2 orthogonal to the optical axis L and the first axis R1. Perform runout correction. Therefore, the optical unit 1 with a runout correction function performs pitching correction and yawing correction.

In the following description, the three axes orthogonal to each other are defined as the X-axis direction, the Y-axis direction, and the Z-axis direction. Further, one side in the X-axis direction is the −X direction, and the other side is the + X direction. One side in the Y-axis direction is the −Y direction, and the other side is the + Y direction. One side in the Z-axis direction is the −Z direction, and the other side is the + Z direction. The Z-axis direction is the optical axis direction along the optical axis L of the lens 2 included in the camera module 4. The + Z direction is the subject side of the camera module 4, and the −Z direction is the anti-subject side of the camera module 4. Further, the direction along the first axis R1 is defined as the first axis R1 direction, and the direction along the second axis R2 is defined as the second axis R2 direction. The first axis R1 and the second axis R2 are tilted 45 degrees with respect to the X axis and the Y axis around the Z axis.

As shown in FIGS. 1, 2, and 3, the optical unit 1 with a shake correction function rotatably supports the movable body 5 including the camera module 4 and the movable body 5 around the first axis R1 and has the first axis. It has a gimbal mechanism 7 that rotatably supports the two axes R2, and a fixed body 8 that supports the movable body 5 via the gimbal mechanism 7. Here, the movable body 5 can swing around the X axis and around the Y axis by combining the rotation around the first axis R1 and the rotation around the second axis R2.

Further, the optical unit 1 with a runout correction function has a runout correction magnetic drive mechanism 10 that rotates the movable body 5 around the first axis R1 and around the second axis R2. Magnetic drive mechanism for runout correction 10
Is a first runout correction magnetic drive mechanism 11 that generates a driving force around the X axis with respect to the movable body 5, and a second runout correction magnetic drive mechanism 11 that generates a driving force around the Y axis with respect to the movable body 5. The mechanism 12 and the like are provided. The first runout correction magnetic drive mechanism 11 is arranged in the −Y direction of the movable body 5. The second runout correction magnetic drive mechanism 12 is arranged in the −X direction of the movable body 5.

(Fixed point)
As shown in FIG. 2, the fixing body 8 includes a resin case 13, a frame-shaped cover 14 fixed to the end face of the case 13 in the + Z direction, and a base fixed to the end face of the case 13 in the −Z direction. 15 is provided. The cover 14 and the base 15 are made of non-magnetic metal. The case 13 includes a rectangular frame portion 16 that surrounds the movable body 5 from the outer peripheral side, and a wiring accommodating portion 17 that is arranged in the + X direction of the frame portion 16. The cover 14 is fixed to the end face of the frame portion 16 in the + Z direction. The camera module 4 and the gimbal mechanism 7 project in the + Z direction from the opening 140 of the cover 14. The frame portion 16 includes a first side wall portion 161 and a second side wall portion 162 facing in the Y direction, and a third side wall portion 163 and a fourth side wall portion 164 facing each other in the X direction. The first side wall portion 161 is located in the −Y direction of the second side wall portion 162. The third side wall portion 163 is located in the −X direction of the fourth side wall portion 164.

As shown in FIG. 2, the first side wall portion 161 is provided with a first coil fixing hole 161a. The first coil 11C is fixed in the first coil fixing hole 161a. The second coil fixing hole 163a is provided in the third side wall portion 163. The second coil 12C is fixed in the second coil fixing hole 163a. The first coil 11C and the second coil 12C are oval air-core coils long in the circumferential direction.

As shown in FIG. 3, the first coil 11C fixed to the first side wall portion 161 and the first magnet 11M fixed to the side surface in the −Y direction of the movable body 5 face each other in the X direction, and the first The magnetic drive mechanism 11 for runout correction is configured. Further, the second coil 12C fixed to the third side wall portion 163 and the second magnet 12M fixed to the side surface in the −Y direction of the movable body 5 face each other in the Y direction, and are magnetically driven for the second runout correction. It constitutes a mechanism 12.

The first coil 11C and the second coil 12C are electrically connected to the flexible printed circuit board 18. The flexible printed circuit board 18 is routed along the outer peripheral surfaces of the first side wall portion 161 and the third side wall portion 163 in the frame portion 16, then extends in the + X direction and is connected to the wiring board (not shown). ..

The flexible printed circuit board 18 includes a first substrate portion 181 fixed to the outer peripheral surface of the third side wall portion 163, a second substrate portion 182 fixed to the outer peripheral surface of the first side wall portion 161, and a first substrate portion 181. It includes a third substrate portion 183 that is connected to the second substrate portion 182. As shown in FIG. 2, the width of the third substrate portion 183 is smaller in the Z-axis direction than that of the first substrate portion 181 and the second substrate portion 182. A recess 160 for arranging the first substrate portion 181 and the second substrate portion 182, and the third substrate portion 183 is formed on the outer peripheral surface of the frame portion 16.

As shown in FIG. 2, the fourth side wall portion 164 of the frame portion 16 is provided with a notch portion 164a notched in the + Z direction. A flexible printed circuit board 19 connected to the camera module 4 is pulled out from the end portion of the movable body 5 in the −Z direction in the + X direction. The flexible printed substrate 19 is pulled out in the + X direction of the frame portion 16 through the notch portion 164a and is accommodated in the wiring accommodating portion 17.

(Movable body)
The movable body 5 includes a camera module 4 and a frame-shaped holder 20 that surrounds the camera module 4 from the outer peripheral side. The camera module 4 includes a camera module main body 4A, a lens barrel portion 4B protruding from the central portion of the camera module main body 4A in the + Z direction, and a substrate 4C fixed to the bottom of the camera module main body 4A. The image pickup device 3 is arranged on the substrate 4C, and the flexible printed circuit board 19 is pulled out from the substrate 4C. The lens 2 is held in the lens barrel portion 4B. The image sensor 3 housed in the camera module main body 4A is arranged on the optical axis L of the lens 2.

As shown in FIG. 3, the shape of the camera module 4 when viewed from the optical axis direction is substantially octagonal. The holder 20 has a first frame portion 21 along the −Y direction side surface of the camera module 4, a second frame portion 22 along the + Y direction side surface of the camera module 4, and a −X direction side surface of the camera module 4. A third frame portion 23 and a fourth frame portion 24 along the side surface of the camera module 4 in the + X direction are provided.

As shown in FIG. 3, the first magnet 11M of the first runout correction magnetic drive mechanism 11 is fixed to the first frame portion 21 of the holder 20, and the second runout correction magnetism is fixed to the third frame portion 23. The second magnet 12M of the drive mechanism 12 is fixed. The first magnet 11M and the second magnet 12M are divided into two in the Z-axis direction. Further, the first yoke 11Y is fixed to the inner peripheral side of the first magnet 11M in the first frame portion 21, and the second yoke 12Y is fixed to the inner peripheral side of the second magnet 12M in the third frame portion 23. Will be done. The first yoke 11Y and the second yoke 12Y are made of a magnetic plate.

(Gimbal mechanism)
As shown in FIG. 3, the gimbal mechanism 7 includes a gimbal frame 70, a first connection mechanism 71 that rotatably connects the gimbal frame 70 and the holder 20 around the first axis R1, a gimbal frame 70, and a case 13. The second connection mechanism 72 is provided so as to be rotatably connected around the second axis R2. The gimbal frame 70 is made of a metal leaf spring. As shown in FIGS. 2, 4, and 5, the gimbal frame 70 faces the gimbal frame central portion 73 located in the + Z direction of the camera module main body 4A and both sides of the gimbal frame central portion 73 in the first axis R1 direction. A pair of first extension portions 74 protruding in the -Z direction, and a pair of second extension portions protruding in the -Z direction from the gimbal frame central portion 73 toward both sides in the second axis R2 direction. 75 is provided. The gimbal frame central portion 73 includes an opening 73a penetrating in the Z-axis direction at the center thereof. The lens barrel portion 4B of the camera module 4 is arranged in the opening portion 73a.

As shown in FIGS. 3 and 4, a first concave portion 25 recessed toward the outer peripheral side is formed at a diagonal position of the holder 20 in the first axis R1 direction. The first connection mechanism 71 includes a first gimbal frame receiving member 76 fixed to the first recess 25, and a first concave curved surface 77 provided at the tip of the first extending portion 74 and recessed in the direction of the first axis R1. Be prepared. The first gimbal frame receiving member 76 includes a sphere 80 that makes point contact with the first concave curved surface 79 on the first axis R1.

As shown in FIGS. 3 and 5, a second recess 26 recessed toward the outer peripheral side is formed at a diagonal position of the frame portion 16 in the second axis R2 direction. The second connection mechanism 72 includes a second gimbal frame receiving member 78 fixed to the second recess 26, and a second concave curved surface 79 provided at the tip of the second extending portion 75 and recessed in the second axis R2 direction. Be prepared. The second gimbal frame receiving member 78 includes a sphere 80 that makes point contact with the second concave curved surface 79 on the second axis R2.

When assembling the gimbal mechanism 7, the pair of second extending portions 75 provided on the gimbal frame 70 are bent inward to the inner peripheral side of the second gimbal frame receiving member 78 fixed to the frame portion 16. It is inserted to form the second connection mechanism 72. As a result, the gimbal frame 70 is rotatably supported around the first axis R1 by the fixed body 8. Further, the pair of first extending portions 74 provided on the gimbal frame 70 are bent toward the inner peripheral side and inserted into the inner peripheral side of the first gimbal frame receiving member 76 fixed to the holder 20, and the first connection is made. It constitutes a mechanism 71. As a result, the holder 20 is rotatably supported around the second axis R2 by the gimbal frame 70.

(Magnetic drive mechanism for runout correction)
As shown in FIG. 3, when the movable body 5 is supported by the gimbal mechanism 7, the first magnet 11M and the first coil 11C fixed to the first frame portion 21 of the movable body 5 have a gap in the Y direction. Open and face each other to form the first runout correction magnetic drive mechanism 11. Further, the second magnet 12M fixed to the third frame portion 23 of the movable body 5 and the second coil 12C face each other with a gap in the X direction to form the second runout correction magnetic drive mechanism 12.

As shown in FIGS. 1 and 2, the magnetic plate 30 is fixed to the flexible printed circuit board 18 at a position overlapping the center of the first coil 11C and a position overlapping the center of the second coil 12C. The magnetic plate 30 arranged at the center of the first coil 11C faces the first magnet 11M of the movable body 5, and is a magnetic spring for returning the movable body 5 to the reference rotation position in the rotation direction around the X axis. Consists of. The magnetic plate 30 arranged at the center of the second coil 12C faces the second magnet 12M of the movable body 5, and is a magnetic spring for returning the movable body 5 to the reference rotation position in the rotation direction around the Y axis. Consists of.

(Bottom structure of fixed body)
FIG. 6 is an exploded perspective view of the frame portion 16 and the base 15. FIG. 7 is a plan view of the frame portion 16 and the base 15 as viewed from the subject side (+ Z direction). As shown in FIGS. 2 and 6, the base 15 includes a frame-shaped first metal plate 51 having an opening 50 and a second metal plate 52 fitted inside the opening 50. In the present specification, the frame shape is not limited to a shape that surrounds the opening 50 all around, and includes a shape that is not partially surrounded in the circumferential direction. In the present embodiment, the first metal plate 51 has a first portion 53 surrounding the −Y direction of the opening 50, a second portion 54 surrounding the −X direction of the opening 50, and a second portion surrounding the + Y direction of the opening 50. It includes three parts 55. The first metal plate 51 does not surround the opening 50 in the + X direction, and the ends of the first portion 53 and the third portion 55 in the + X direction are not connected.

The first metal plate 51 and the second metal plate 52 have the same plate thickness. As shown in FIGS. 2, 4, and 5, the second metal plate 52 is fitted inside the opening 50. The second metal plate 52 is fixed to the first metal plate 51 by joining the inner peripheral end surface of the opening 50 and the outer peripheral end surface of the second metal plate 52 by welding.

The first metal plate 51 is in contact with the end surface 165 of the frame portion 16 in the −Z direction and is fixed to the end surface 165 by an adhesive, and the first metal plate 51 is diagonal to the first axis R1 direction. Protrusions 56 projecting in the + Z direction are formed at four positions and diagonal positions in the second axis R2 direction (see the partially enlarged views of FIGS. 4 and 5). In this embodiment, the protrusion 56 is a raised portion obtained by cutting and raising a metal plate. Therefore, the first metal plate 51 has a hole adjacent to the protrusion 56. The protrusion 56 is press-fitted into the end face 165 of the resin frame 16 in the −Z direction. Therefore, the first metal plate 51 is fixed to the frame portion 16 by using an adhesive and press-fitting in combination.

As shown in FIG. 7, in the first metal plate 51, the edge portion 57 surrounding the opening 50 projects toward the inner peripheral side of the inner peripheral surface of the frame portion 16. As shown in FIGS. 4 and 5, the edge portion 57 extends inwardly to a position facing the holder 20 arranged on the outer peripheral portion of the movable body 5 in the Z-axis direction. Therefore, the edge portion 57 functions as a stopper portion that restricts the movement of the movable body 5 in the −Z direction.

FIG. 8 is an exploded perspective view of the holder 20 and the camera module 4. As shown in FIG. 8, the camera module 4 includes a projecting portion 40 projecting from the side surface of the camera module main body 4A in the −Y direction, the −X direction, and the + Y direction toward the outer peripheral side. A plurality of recesses 41 recessed in the + Z direction are formed on the inner peripheral edges of the holder 20 in the −Y direction, the −X direction, and the + Y direction. The protruding portion 40 of the camera module main body 4A overlaps a part of the plurality of recesses 41 when viewed from the optical axis direction. When assembling the movable body 5, the camera module 4 is inserted inside the holder 20 from the −Z direction, and the protrusion 40 is brought into contact with the recess 41 to position the camera module 4 in the optical axis direction. Further, the recess 41 is used as an adhesive reservoir for putting an adhesive for fixing the camera module 4 to the holder 20.

FIG. 9 is a plan view of the frame portion 16 to which the first metal plate 51 is attached as viewed from the anti-subject side. In FIG. 9, the positions of the holder 20 and the camera module 4 when supported by the frame portion 16 via the gimbal mechanism 7 are shown by broken lines. As shown in FIG. 9, the camera module 4 is located inside the opening 50 of the first metal plate 51 when viewed from the optical axis direction.

The first metal plate 51 includes a notch 58 in which the edge 57 of the opening 50 is cut out toward the outer periphery. When viewed from the optical axis direction, the recess 41 of the holder 20 is located inside the notch 58. Therefore, the notch 58 is used as a window through which a syringe for inserting an adhesive is passed into the recess 41. That is, when applying the adhesive to the recess 41, the tip of the syringe is made to reach the recess 41 through the syringe for applying the adhesive through the notch 58, and the adhesive is applied. As a result, the adhesive can be applied to the recess 41 from the −Z direction of the first metal plate 51 in a state where the holder 20 is incorporated inside the frame portion 16 and the first metal plate 51 is attached to the frame portion 16. ..

In the manufacturing process of the optical unit 1 with the shake correction function, an intermediate product in which parts other than the camera module 4, the flexible printed substrate 19, and the second metal plate 52 are assembled is produced, and an intermediate inspection is performed. The intermediate product is a unit in which the case 13 and the holder 20 are connected via the gimbal mechanism 7, and the parts constituting the runout correction magnetic drive mechanism 10 are attached to the case 13 and the holder 20. Further, in the intermediate product, the first metal plate 51 is fixed to the frame portion 16, and the edge portion 57 of the first metal plate 51 constitutes a stopper mechanism for restricting the movement of the holder 20 in the −Z direction. In the intermediate inspection, the gap between the holder 20 and the first metal plate 51 is confirmed, and the dimensional accuracy of the stopper mechanism is confirmed.

After that, the camera module 4 is assembled to the intermediate product, and the flexible printed board 19 is routed inside the wiring accommodating portion 17. At this time, as described above, the adhesive is applied from the notch 58 provided at the edge 57 of the opening 50 to fix the camera module 4. Then, the second metal plate 52 is fitted into the opening 50 and fixed to the first metal plate 51 by welding to close the opening 50.

(Main action and effect of this form)
As described above, the optical unit 1 with the shake correction function of the present embodiment swingably supports the movable body 5 provided with the camera module 4 and the movable body 5 around the first axis R1 intersecting the optical axis L. Along with this, a swing support mechanism that swingably supports the movable body 5 around the second axis R2 that intersects the optical axis L and the first axis R1, and a fixed body that supports the movable body 5 via the swing support mechanism. 8 and. The fixed body 8 is a resin case 13 having a frame portion 16 surrounding the outer peripheral side of the movable body 5, and a metal base fixed to the frame portion 16 from the −Z direction (opposite subject side in the optical axis direction). 15 is provided. The base 15 includes a frame-shaped first metal plate 51 having an opening 50, and a second metal plate 52 fitted inside the opening 50. In the first metal plate 51, the edge portion 57 of the opening 50 projects toward the inner peripheral side of the frame portion 16, and the edge portion 57 overlaps with the movable body 5 in the optical axis direction.

In this embodiment, the metal base 15 fixed to the resin case 13 from the −Z direction has a first metal plate 51 having an opening 50 and a second metal plate fitted inside the first metal plate 51. 52 is provided. The edge portion 57 of the opening 50 in the first metal plate 51 overlaps with the movable body 5 in the optical axis direction and functions as a stopper portion. Therefore, since it is not necessary to form the stopper portion on the case 13 which is a resin component, the thickness of the stopper portion in the optical axis direction can be reduced. When forming a stopper portion on a resin part, a thickness of 0.3 mm or more is required to secure the required strength, but if it is a metal, the required strength is required even if the thickness is 0.1 mm. can get. Therefore, according to the structure of this embodiment, the height of the fixed body 8 in the optical axis direction can be lowered, and the product height of the optical unit 1 with the shake correction function in the optical axis direction can be lowered.

Further, in the present embodiment, the base 15 includes an opening 50 provided in the first metal plate 51 provided with a stopper portion and a second metal plate 52 fitted in the opening 50. Therefore, after the first metal plate 51 is attached to the frame portion 16 to form the stopper mechanism, the movable body 5 can be assembled by inserting parts from the opening 50 to the inside of the frame portion 16. Further, since the second metal plate 52 that closes the opening 50 is fitted inside the opening 50, the base 15 can have the thickness of one metal plate, and the thickness of the base 15 can be reduced. Therefore, it is possible to reduce the thickness of the optical unit 1 with the shake correction function in the optical axis direction.

In the present embodiment, the first metal plate 51 includes a protrusion 56 that is press-fitted into the end face 165 of the frame portion 16 in the −Z direction. Therefore, since the adhesive and the press-fitting can be used together for fixing, the fixing strength of the base 15 to the case 13 can be increased.

In this embodiment, the movable body 5 includes a holder 20 for holding the camera module 4, and the swing support mechanism is a gimbal mechanism 7 for connecting the holder 20 and the fixed body 8. The camera module 4 is located inside the opening 50 when viewed from the optical axis direction. Therefore, when manufacturing the optical unit 1 with the shake correction function, an intermediate inspection is performed in the state of an intermediate product in which the case 13 and the holder 20 are connected by the gimbal mechanism 7, and then the camera module 4 is inserted from the opening 50 to the holder. 20 can be attached to complete the optical unit 1 with a runout correction function. The intermediate product is assembled so that the holder 20 constituting the movable body 5 and the first metal plate 51 face each other in the optical axis direction, and is provided with a stopper mechanism. Therefore, the gap between the holder 20 and the first metal plate 51 can be confirmed in the intermediate inspection, and the dimensional accuracy of the stopper mechanism can be confirmed.

In the present embodiment, the runout correction magnetic drive mechanism 10 that swings the movable body 5 around the first axis R1 line and the second axis R2 line is the first coil 11C and the second coil 12C arranged on the fixed body 8. A first magnet 11M and a second magnet 12M arranged on the movable body 5 are provided. The frame portion 16 includes a first coil fixing hole 161a in which the first coil 11C is arranged and a coil fixing hole 163a in which the second coil 12C is arranged, and is connected to the first coil 11C and the second coil 12C. A recess 160 in which the flexible printed circuit board 18 is arranged is provided. In this embodiment, since the frame portion 16 is a resin component, it can be easily manufactured into a shape provided with coil fixing holes and recesses for facilitating fixing and positioning of the coil and the flexible printed substrate 18.

(Modification example)
(1) In the above embodiment, the protrusion 56 provided on the first metal plate 51 is press-fitted into the frame portion 16, but a hole is provided in the first metal plate 51 and the frame portion 16 is in the −Z direction. A configuration may be adopted in which a protrusion is provided on the end surface 165 of the metal plate 51 and the first metal plate 51 is fixed by press-fitting the protrusion of the frame portion 16 into the hole of the first metal plate 51.

(2) A configuration may be adopted in which neither the first metal plate 51 nor the frame portion 16 is provided with a protrusion for press fitting, and the first metal plate 51 is fixed to the frame portion 16 only with an adhesive.

1 ... Optical unit with shake correction function, 2 ... Lens, 3 ... Image pickup element, 4 ... Camera module, 4A ... Camera module body, 4B ... Lens tube, 4C ... Board, 5 ... Movable body, 7 ... Gimbal mechanism, 8 ... Fixed body, 10 ... Magnetic drive mechanism for runout correction, 11 ... First runout correction magnetic drive mechanism, 11C ... First coil, 11M ... First magnet, 11Y ... First yoke, 12 ... Second runout correction magnetism Drive mechanism, 12C ... 2nd coil, 12M ... 2nd magnet, 12Y ... 2nd yoke, 13 ... case, 14 ... cover, 15 ... base, 16 ... frame part, 17 ... wiring housing part, 18, 19 ... flexible print Substrate, 20 ... Holder, 21 ... 1st frame part, 22 ... 2nd frame part, 23 ... 3rd frame part, 24 ... 4th frame part, 25 ... 1st recess, 26 ... 2nd recess, 30 ... Magnetic plate , 40 ... protrusion, 41 ... recess, 50 ... opening, 51 ... first metal plate, 52 ... second metal plate, 53 ... first part, 54 ... second part, 55 ... third part, 56 ... protrusion Part, 57 ... Edge, 58 ... Notch, 70 ... Gimbal frame, 71 ... First connection mechanism, 72 ... Second connection mechanism, 73 ... Gimbal frame center, 73a ... Opening, 74 ... First extension Part, 75 ... 2nd extension part, 76 ... 1st gimbal frame receiving member, 77 ... 1st concave curved surface, 78 ... 2nd gimbal frame receiving member, 79 ... 2nd concave curved surface, 80 ... sphere, 140 ... opening , 160 ... concave, 161a ... first coil fixing hole, 161 ... first side wall, 162 ... second side wall, 163a ... second coil fixing hole, 163 ... third side wall, 164 ... fourth side wall, 164a ... notch, 165 ... end face in -Z direction, 181 ... first substrate portion, 182 ... second substrate portion, 183 ... third substrate portion, L ... optical axis, R1 ... first axis, R2 ... second axis

Claims (4)

A movable body equipped with a camera module,
The movable body is swingably supported around a first axis that intersects the optical axis of the camera module, and the movable body is swingable around a second axis that intersects the optical axis and the first axis. A swing support mechanism to support and
It has a fixed body that supports the movable body via the swing support mechanism, and has.
The fixed body is
A resin case having a frame portion surrounding the outer peripheral side of the movable body, and
The frame portion is provided with a metal base fixed from the side opposite to the subject in the optical axis direction.
The base comprises a frame-shaped first metal plate having an opening and a second metal plate fitted inside the opening.
In the first metal plate, the edge portion of the opening projectes toward the inner peripheral side of the frame portion.
The edge portion is an optical unit with a runout correction function, characterized in that it overlaps with the movable body in the optical axis direction. The optical unit with a runout correction function according to claim 1, wherein one of the first metal plate and the frame portion is provided with a protrusion that is press-fitted into the other of the first metal plate and the frame portion. The movable body comprises a holder for holding the camera module.
The swing support mechanism is a gimbal mechanism that connects the holder and the fixed body.
The optical unit with a shake correction function according to claim 1 or 2, wherein the camera module is located inside the opening when viewed from the optical axis direction. It has a runout correction magnetic drive mechanism that swings the movable body around the first axis and around the second axis.
The runout correction magnetic drive mechanism includes a coil arranged on the fixed body and a magnet arranged on the movable body.
The frame portion according to any one of claims 1 to 3, wherein the frame portion includes a coil fixing hole in which a coil is arranged and a recess in which a flexible printed circuit board connected to the coil is arranged. Optical unit with runout correction function.

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