CN116916136A

CN116916136A - Optical unit with jitter correction function

Info

Publication number: CN116916136A
Application number: CN202310424536.5A
Authority: CN
Inventors: 新井努; 须江猛
Original assignee: Nidec Instruments Corp
Current assignee: Nidec Instruments Corp
Priority date: 2022-04-19
Filing date: 2023-04-19
Publication date: 2023-10-20
Also published as: JP2023158847A

Abstract

An optical unit with a shake correction function, which suppresses an increase in size of the optical unit with the shake correction function caused by a flexible printed board being pulled into a large shape in order to reduce a rotational load of a movable body. An optical unit (1) with a shake correction function is provided with: a movable body (10) and a fixed body (11); and a rotation support mechanism (12) and a gimbal mechanism (13) that support the movable body (10) rotatably relative to the fixed body (11). The flexible printed boards (6A, 6B) connected to the first camera module (2A) and the second camera module (2B) are led out of the outer peripheral side of the housing (3) that houses the rotation support mechanism (12) and the gimbal mechanism (13), bent in the-Z direction on the outer peripheral side of the housing (3), and connected to the board (5) fixed to the housing (3) from the-Z direction.

Description

Optical unit with jitter correction function

Technical Field

The present invention relates to an optical unit with a shake correction function that corrects shake by rotating a camera module.

Background

In order to suppress disturbance of a captured image when the mobile terminal or the mobile body is moved, a shake correction is performed in which a mobile body including a camera module is rotated around an optical axis, around a first axis intersecting the optical axis, and around a second axis intersecting the optical axis and intersecting the first axis, in an optical unit mounted on the mobile terminal or the mobile body.

The optical unit with the shake correction function of patent document 1 has a fixed body and a movable body supported so as to be rotatable with respect to the fixed body about a first axis (X axis) and a second axis (Y axis) intersecting an optical axis (Z axis). The movable body includes a holder frame for fixing a camera module (optical module) and a magnet fixed to the holder frame. The fixing body includes a fixing frame surrounding an outer periphery of the holder frame. A gimbal mechanism that supports the movable body so as to be rotatable about a first axis (X axis) and a second axis (Y axis) with respect to the fixed body connects the holder frame and the fixed frame.

In the optical unit with the shake correction function of patent document 1, the flexible printed board led out from the camera module is led out from the side surface of the fixed frame to the outer peripheral side, and is housed inside a frame-shaped wall portion that is one turn smaller than the fixed frame. In order to reduce the spring constant at the time of deformation of the flexible printed board when the movable body swings and reduce the rotational load, the flexible printed board is pulled into a shape curved in a plane.

Prior art literature

Patent literature

Patent document 1: japanese patent application laid-open No. 2021-124711

In the optical unit with the shake correction function, in order to reduce the rotational load of the movable body, it is preferable to reduce the spring constant when the flexible printed board is deformed, but for this purpose, the pull-around space of the flexible printed board must be increased. If a large space for accommodating the flexible printed board is provided outside the fixed frame as in patent document 1, there is a problem in that the outer shape of the optical unit with the shake correction function becomes large.

In addition, the optical unit with the shake correction function of patent document 1 does not include a mechanism for performing the shake correction for rotating the movable body around the optical axis, but in the case of performing the shake correction in addition to the shake correction around the first axis (X axis) and around the second axis (Y axis), a space for pulling around the flexible printed board must be ensured to be larger in consideration of the spring constant of the flexible printed board at the time of the shake correction. Therefore, there is a problem in that the outer shape of the optical unit with the shake correction function is further enlarged.

Disclosure of Invention

In view of this, an object of the present invention is to suppress an increase in size of an optical unit with a shake correction function, which is caused by a flexible printed board being pulled into a large shape in order to reduce a rotational load of a movable body.

In order to solve the above problems, an optical unit with a shake correction function according to the present invention includes: a movable body provided with a camera module and a camera holder for holding the camera module; a fixed body; a rotation support mechanism that supports the movable body with respect to the fixed body so as to be rotatable about a rotation axis along an optical axis of the camera module; a gimbal mechanism that supports the movable body with respect to the fixed body so as to be rotatable about a first axis intersecting the rotation axis, and is supported so as to be rotatable about a second axis intersecting the rotation axis and intersecting the first axis; and a substrate connected to the camera module via a flexible printed circuit board, the stationary body having a housing that houses the movable body, the rotation support mechanism, and the gimbal mechanism, the substrate being disposed on a side of the housing opposite to the subject of the camera module, when a direction along the rotation axis is a rotation axis direction, one side of the rotation axis direction is a subject side of the camera module, and the other side of the rotation axis direction is a subject opposite side of the camera module, the flexible printed circuit board comprising: a first portion that is led out from the camera module in a direction intersecting the rotation axis and extends toward an outer peripheral side of the housing; a second portion curved from the first portion toward the opposite side of the subject; and a third portion extending from the second portion toward the opposite side of the subject from the substrate and connected to the substrate.

According to the present invention, a flexible printed board led out from a housing accommodating a rotation support mechanism and a gimbal mechanism to an outer peripheral side of the housing is bent and connected to a board arranged on a lower side (opposite side to an object) of the housing. In this way, the flexible printed circuit board is stretched and wound in a greatly curved shape and has a small spring constant, so that the rotational load of the movable body can be reduced, and power saving can be achieved. In addition, a space between the first portion and the third portion of the flexible printed board can be used as a space in which the bottom of the case and the members constituting the rotation support mechanism and the gimbal mechanism are arranged. Therefore, the dead zone generated by pulling the flexible printed circuit board into a shape with a small rotational load of the movable body can be reduced, and the optical unit with the shake correction function can be prevented from being enlarged.

In the present invention, it is preferable that the rotation support mechanism includes a rotation support frame disposed on the opposite side and the outer peripheral side of the camera holder to the object, and the gimbal mechanism includes: a gimbal frame including a frame portion disposed on the opposite side of the camera holder and the object of the rotary support frame, a pair of first extending portions extending from the frame portion toward the object side and disposed on both sides of the camera holder and the rotary support frame in the first axial direction, and a pair of second extending portions extending from the frame portion toward the rotation axis direction and disposed on both sides of the camera holder and the rotary support frame in the second axial direction; a first connection mechanism that connects the pair of first extension portions and the rotation support frame to be rotatable about the first axis; and a second connection mechanism that connects the pair of second extension portions and the housing to be rotatable about the second axis. In this way, the space between the first portion and the third portion of the flexible printed board is used as a space for disposing the gimbal frame and the rotary support frame, so that the dead space can be reduced, and the optical unit with the shake correction function can be prevented from being enlarged. Further, since the gimbal frame extends toward the outer periphery of the rotary support frame and is connected to the rotary support frame and the housing, the first shaft and the second shaft, which are swing shafts, can be brought close to the center of gravity of the movable body. Therefore, the rotational load of the movable body can be reduced.

In the present invention, it is preferable that the movable body includes two camera modules arranged in a first direction intersecting the rotation axis direction, the camera holder includes a camera module insertion port that opens at one side in a second direction intersecting the rotation axis direction and intersecting the first direction, the housing includes a housing cutout portion located on an outer peripheral side of the camera module insertion port, and the flexible printed board is led out to one side in the second direction of the housing through the camera module insertion port and the housing cutout portion. In this way, since photographing can be performed by two camera modules, it is useful when photographing in a different manner is desired. Further, since the camera module insertion opening faces both of the two camera modules, the two camera modules can be easily assembled from the outer peripheral side. In addition, the flexible printed circuit board can be drawn and wound into a shape that is greatly curved by using the opening (camera module insertion opening and housing cutout) for assembling the camera module from the outside of the housing. In this way, the intermediate product can be manufactured by first assembling components (camera holder, rotation support mechanism, gimbal mechanism, and shake correction actuator) other than the camera module on the inner side of the housing, and the camera module can be assembled to the intermediate product from the outer side of the housing. Therefore, inspection of the rotation support mechanism, the gimbal mechanism, and the actuator for shake correction can be performed in a state of the intermediate product before the final product.

In the present invention, the fixing body preferably has: an object side cover covering the housing from the object side; and a subject-side cover that covers the substrate from the subject-side, the subject-side cover including a subject-side cover projection projecting in a direction in which the flexible printed substrate is drawn out from the housing, the subject-side cover including a subject-side cover projection projecting toward the subject-side, the second portion being housed inside the subject-side cover projection and the subject-side cover projection. In this way, the flexible printed board led out to the outside of the case and stretched and wound in a largely curved shape can be protected. In addition, the cover can be formed in a shape conforming to the outer shape of the case on the side where the flexible printed board is not drawn around. Therefore, the optical unit with the shake correction function can be prevented from being enlarged.

In the present invention, it is preferable that the connector attachment/detachment portion is attached to the substrate, and the connector portion attached to and detached from the connector attachment/detachment portion is provided at a distal end of the flexible printed board. Thus, the flexible printed board can be pulled around to a target shape and connected to the board by merely fitting the front end of the flexible printed board into the connector attaching/detaching portion, and thus the assembling property is good.

In the present invention, the rotary support frame preferably includes: a first plate portion overlapping the camera holder from the object side; a second plate portion overlapping the camera holder from the opposite side of the subject; and a connection plate portion that is disposed on an outer peripheral side of the camera holder and connects the first plate portion and the second plate portion, wherein the first plate portion includes a first contact portion that is in point contact with the camera holder from the object side on the rotation axis, and the second plate portion includes a second contact portion that is in point contact with the camera holder from the opposite side of the object side on the rotation axis. In this way, when the camera holder is supported at two points on the rotation axis, the camera holder can be stably supported even by a large movable body. Therefore, the shaking of the movable body can be suppressed, and the rotational position of the movable body can be easily controlled. In addition, since the space between the first portion and the third portion of the flexible printed board is used as the space in which the second contact portion and the second plate portion of the rotation support frame are arranged, the dead space can be reduced, and the optical unit with the shake correction function can be prevented from being enlarged.

In the present invention, the rotary support frame preferably includes: a third plate portion overlapping the second plate portion from the object-opposite side; and a plurality of connecting plate portions that are disposed on the outer peripheral side of the camera holder and connect the first plate portion and the third plate portion, the third plate portion having an arc groove, the camera holder having a rotation restricting projection that protrudes toward the opposite side of the subject and is disposed in the arc groove. In this way, the rotation support frame is formed into a frame-like structure surrounding the outer periphery of the camera holder, and the rigidity is high. Therefore, even if the weight of the movable body is large, stable support can be performed. Further, the stopper mechanism for restricting the rotation range of the movable body can be constituted by the circular arc groove and the rotation restricting convex portion, and the camera holder can be restricted from being detached from the rotation support frame by an impact such as a drop, so that the impact resistance can be improved. In addition, since the space between the first portion and the third portion of the flexible printed board is used as the space in which the third plate portion and the rotation restricting convex portion are disposed, the dead space can be reduced, and the optical unit with the shake correction function can be prevented from being enlarged.

Drawings

Fig. 1 is a perspective view of an optical unit with a shake correction function to which the present invention is applied.

Fig. 2 is an exploded perspective view of the optical unit with the shake correction function showing a state in which the cover is detached from the housing.

Fig. 3 is an exploded perspective view of the housing, the gimbal mechanism, the rotary support mechanism, and the movable body.

Fig. 4 is a cross-sectional view of the optical unit with the shake correction function cut by the XY plane.

Fig. 5 is a cross-sectional view of the optical unit with the shake correction function taken along the XZ plane.

Fig. 6 is a cross-sectional view of the optical unit with the shake correction function taken along the YZ plane.

Fig. 7 is an exploded perspective view of the rotary support mechanism and the movable body as seen from the object side.

Fig. 8 is an exploded perspective view of the rotary support mechanism and the movable body as seen from the opposite side of the subject.

Fig. 9 is an exploded perspective view of the intermediate product and the camera module as seen from the object side.

Fig. 10 is an exploded perspective view of the intermediate product and the camera module as seen from the opposite side of the subject.

Detailed Description

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

(integral structure)

Fig. 1 is a perspective view of an optical unit 1 with a shake correction function to which the present invention is applied. Fig. 2 is a perspective view of the optical unit 1 with shake correction function showing a state in which the cover 4 is removed from the housing 3.

Fig. 3 is an exploded perspective view of the housing 3, the gimbal mechanism 13, the rotation support mechanism 12, and the movable body 10. Fig. 4 is a cross-sectional view of the optical unit 1 with a shake correction function cut through the XY plane. Fig. 5 is a cross-sectional view of the optical unit 1 with the shake correction function taken along the XZ plane, and is a cross-sectional view taken along a plane including the optical axes L1, L2 and the rotation axis L0. Fig. 6 is a cross-sectional view of the optical unit 1 with the shake correction function cut by the YZ plane.

As shown in fig. 1 to 6, the optical unit 1 with a shake correction function includes: a movable body 10 provided with a first camera module 2A and a second camera module 2B; and a fixed body 11 supporting the movable body 10. The fixing body 11 includes: a case 3 surrounding the movable body 10 from the outer peripheral side; and a cover 4 that houses the housing 3 and the movable body 10 inside.

The optical unit 1 with the shake correction function includes: a substrate 5 (see fig. 7 and 8) disposed outside the housing 3; flexible printed boards 6A and 6B which are led out from the movable body 10 and connected to the board 5; and flexible printed boards 7A, 7B, 7C extending from the substrate 5 to the outer peripheral side and disposed on the outer peripheral surface of the case 3.

The optical unit 1 with the shake correction function is used for optical devices such as a camera-equipped mobile phone, a steering recorder, a helmet, a bicycle, an unmanned aerial vehicle, a mobile body such as a radio-controlled helicopter, and a wearable camera. In such an optical device, if shake of the optical device occurs at the time of photographing, disturbance occurs in a photographed image. The optical unit 1 with shake correction function corrects the tilt of the movable body 10 including the first camera module 2A and the second camera module 2B based on the acceleration, the angular velocity, the shake amount, and the like detected by the detection means such as a gyroscope, in order to avoid the tilt of the captured image.

The first camera module 2A includes a lens 8A and an imaging element (not shown) disposed on an optical axis L1 of the lens 8A. The second camera module 2B includes a lens 8B and an imaging element (not shown) disposed on an optical axis L2 of the lens 8B. The optical axis L1 of the lens 8A in the first camera module 2A is parallel to the optical axis L2 of the lens 8B in the second camera module 2B. The optical unit 1 with the shake correction function performs shake correction by rotating the movable body 10 about a rotation axis L0 parallel to the optical axes L1, L2, about a first axis R1 orthogonal to the rotation axis L0, and about a second axis R2 orthogonal to the rotation axis L0 and the first axis R1.

In the following description, three axes orthogonal to each other are defined as an X axis, a Y axis, and a Z axis, a direction along the X axis is defined as an X axis direction, a direction along the Y axis is defined as a Y axis direction, and a direction along the Z axis is defined as a Z axis direction. One side in the X-axis direction is defined as the-X direction, and the other side is defined as the +X direction. One side in the Y-axis direction is set as the-Y direction, and the other side is set as the +Y direction. One side in the Z-axis direction is set as the-Z direction, and the other side is set as the +Z direction.

The X direction is the first direction. The first camera module 2A and the second camera module 2B are arranged in a first direction (X-axis direction). The Y-axis direction is the second direction. When the directions along the optical axes L1 and L2 are the optical axis direction and the direction along the rotation axis L0 is the rotation axis direction, the Z-axis direction coincides with the optical axis direction and the rotation axis direction. The +z direction is a side in the rotation axis direction, and is the object side of the first camera module 2A and the second camera module 2B. The Z direction is the other side of the rotation axis direction, being the opposite side of the object of the first camera module 2A and the second camera module 2B. The direction along the first axis R1 is the first axis direction, and the direction along the second axis R2 is the second axis direction.

The optical unit 1 with the shake correction function has: a rotation support mechanism 12 that supports the movable body 10 rotatably about a rotation axis L0 along the optical axes L1, L2; a gimbal mechanism 13. The gimbal mechanism 13 is a swing support mechanism that supports the rotation support mechanism 12 rotatably about the first axis R1 and supports the rotation support mechanism 12 rotatably about the second axis R2. Therefore, the movable body 10 is supported by the fixed body 11 via the rotation support mechanism 12 and the gimbal mechanism 13 so as to be rotatable about the rotation axis L0, the first shaft R1, and the second shaft R2.

As shown in fig. 3 and 4, the gimbal mechanism 13 includes a gimbal frame 14 and a first connection mechanism 15, and the first connection mechanism 15 connects the gimbal frame 14 and the rotation support mechanism 12 rotatably about a first axis R1. The first connection mechanisms 15 are provided on both sides of the gimbal frame 14 in the first axial direction. The gimbal mechanism 13 further includes a second connection mechanism 16, and the second connection mechanism 16 connects the gimbal frame 14 and the fixed body 11 rotatably about the second axis R2. The second connection mechanisms 16 are provided on both sides of the gimbal frame 14 in the second axial direction.

The optical unit 1 with the shake correction function includes a shake correction magnetic drive mechanism 20 that rotates the movable body 10 about the first axis R1 and the second axis R2. As shown in fig. 4, the shake correction magnetic drive mechanism 20 includes: a first shake correction magnetic drive mechanism 21 that generates a drive force about the X axis on the movable body 10; and a second shake correction magnetic drive mechanism 22 for generating a drive force about the Y axis to the movable body 10. In the present embodiment, the first shake correction magnetic drive mechanism 21 is disposed in the-Y direction of the movable body 10. The second shake correction magnetic drive mechanism 22 is disposed in the +x direction of the movable body 10.

By combining the rotation about the first axis R1 and the rotation about the second axis R2, the movable body 10 rotates about the X axis and the Y axis. Thus, the optical unit 1 with the shake correction function performs pitch correction around the X axis and yaw correction around the Y axis.

The optical unit 1 with the shake correction function includes a roll correction magnetic drive mechanism 23 for rotating the movable body 10 about the rotation axis L0. As shown in fig. 4, the magnetic driving mechanism 23 for roll correction is arranged in the-X direction of the movable body 10.

(fixed body)

In the fixed body 11, the cover 4 includes: an object side cover 41 covering the housing 3 from the object side (+z direction); and an object-side cover 42 covering the housing 3 from the object-side (-Z direction). The object side cover 41 and the object opposite side cover 42 are made of a nonmagnetic metal. The housing 3 is made of resin. The housing 3 includes: a case bottom 31 having a substantially rectangular shape as viewed in the Z-axis direction; and a case wall portion 32 extending from an outer edge of the case bottom portion 31 in the +z direction (subject side). The movable body 10, the rotation support mechanism 12, and the gimbal mechanism 13 are housed inside the housing wall 32.

As shown in fig. 3 and 4, the housing wall 32 includes: a first wall 33 extending in the X-axis direction along an edge of the housing bottom 31 in the-Y direction; a second wall 34 extending in the Y-axis direction along the +x-direction edge of the housing bottom 31; and a third wall 35 extending in the Y-axis direction along the-X-direction edge of the housing bottom 31. The case wall 32 includes a case cutout 36 for cutting a portion located in the +y direction of the movable body 10 in the-Z direction to the case bottom 31.

The flexible printed board 6A connected to the imaging element of the first camera module 2A and the flexible printed board 6B connected to the imaging element of the second camera module 2B are led out in the +y direction from the end of the movable body 10 in the-Z direction. As shown in fig. 2, the flexible printed boards 6A and 6B are led out of the case 3 through the case cutout 36, bent in the-Z direction, and connected to the board 5 fixed to the-Z surface of the case bottom 31 (see fig. 6).

As shown in fig. 3 and 4, a first coil fixing hole 33a is provided in the first wall 33 of the housing 3. The first coil 21C is fixed in the first coil fixing hole 33a. A second coil fixing hole 34a is provided in the second wall 34 of the housing 3. The second coil 22C is fixed in the second coil fixing hole 34a. In addition, a third coil fixing hole 35a is provided in the third wall 35. The third coil 23C is disposed in the third coil fixing hole 35a. The first coil 21C is an oblong air-core coil long in the X-axis direction. The second coil 22C is an oblong air-core coil longer in the Y-axis direction. The third coil 23C is an oblong air-core coil long in the Z-axis direction.

As shown in fig. 4, the first coil 21C fixed to the first wall 33 and the first magnet 21M fixed to the side surface of the movable body 10 in the-Y direction are opposed to each other in the Y axis direction, and the first shake correction magnetic drive mechanism 21 is configured. The second coil 22C fixed to the second wall 34 and the second magnet 22M fixed to the +x side surface of the movable body 10 face each other in the X axis direction, and the second shake correction magnetic drive mechanism 22 is configured. The third coil 23C fixed to the third wall 35 and the third magnet 23M fixed to the side surface of the movable body 10 in the-X direction face each other in the X-axis direction, and the magnetic driving mechanism 23 for roll correction is configured.

The flexible printed boards 7A, 7B, and 7C are disposed on the outer peripheral surface of the case wall 32. The flexible printed board 7A is disposed in a recess formed in the outer peripheral surface of the first wall 33 and electrically connected to the first coil 21C. The flexible printed board 7B is disposed in a recess formed in the outer peripheral surface of the second wall 34 and electrically connected to the second coil 22C. The flexible printed board 7C is disposed in a recess formed in the outer peripheral surface of the third wall 35 and electrically connected to the third coil 23C. The flexible printed boards 7A, 7B, and 7C extend in the-Z direction of the case bottom 31, are bent toward the inner peripheral side, and are connected to the board 5.

The magnetic plates 17 are fixed to the flexible printed boards 7A and 7B at two positions, i.e., a position overlapping the center of the first coil 21C and a position overlapping the center of the second coil 22C (see fig. 4). The magnetic plate 17 and the first magnet 21M overlapped with the first coil 21C constitute a magnetic spring for resetting the movable body 10 to a reference angular position in the rotation direction around the X axis. Further, the magnetic plate 17 and the second magnet 22M overlapped with the second coil 22C constitute a magnetic spring for resetting the movable body 10 to the reference angular position in the rotation direction around the Y axis. Further, on the flexible printed boards 7A, 7B, and 7C, an angular position sensor (not shown) is arranged at the center of each coil. The optical unit 1 with shake correction function obtains the angular positions of the movable body 10 in the rotational directions about the X-axis, about the Y-axis, and about the Z-axis based on the output of the angular position sensor.

As shown in fig. 1 and 2, the subject side cover 41 includes: a cover upper plate portion 43 that covers the housing 3 from the +z direction, and the movable body 10 and the rotation support mechanism 12 housed inside the housing 3; and a cover side plate portion 44 extending in the-Z direction from the outer edge of the cover upper plate portion 43. The cover upper plate portion 43 includes: an oblong recess 431 longer in the X direction; and two circular openings 432A, 432B arranged in the X direction at the bottom of the oblong recess 431. The lens barrel portion 25A of the first camera module 2A faces the circular opening portion 432A in the Z-axis direction, and the lens barrel portion 25B of the second camera module 2B faces the circular opening portion 432B in the Z-axis direction. As shown in fig. 1, the first camera module 2A and the second camera module 2B capture the +z direction from the circular opening portions 432A, 432B.

The object side cover 41 includes an object side cover protruding portion 45 protruding in a shape protruding in the +y direction on the outer peripheral side of the case cutout portion 36. As shown in fig. 2, the object side cover projection 45 includes: an upper plate protruding portion 451 protruding in the +y direction from the center of the +y direction end of the cover upper plate portion 43; and a side plate protruding portion 452 extending in the-Z direction from the edge of the +y direction, -X direction, and +x direction of the upper plate protruding portion 451. The subject-side cover protruding portion 45 accommodates the flexible printed boards 6A, 6B led out in the +y direction of the case 3 inside.

The subject opposite-side cover 42 includes: a cover bottom plate portion 46 opposed to the housing bottom portion 31 from the-Z direction; and a cover rim portion 48 extending in the +z direction from the outer edge of the cover bottom plate portion 46. The cover bottom plate portion 46 includes a subject-side cover protruding portion 47 that accommodates the flexible printed boards 6A, 6B inside. The subject-side cover projection 47 includes: a tilting portion 471 which is tilted in the direction toward the-Z direction as it goes toward the +y direction in the-Z direction of the substrate 5; and a flat surface portion 472 bent from an end portion in the +y direction of the inclined portion 471 to the +y direction and extending parallel to the XY plane (see fig. 2 and 8).

As shown in fig. 1, in the present embodiment, the width of the object-side cover 42 in the X-axis direction is equal to the width of the object-side cover projection 45 in the X-axis direction, and is smaller than the width of the case bottom 31 in the X-axis direction. The object-opposite-side cover 42 is arranged such that the cover edge portion 48 is opposed to the side plate protruding portion 452 in the Z-axis direction. Accordingly, the subject-side cover protruding portion 47 and the cover edge portion 48 accommodate the flexible printed boards 6A and 6B, which are stretched and wound in a shape that is largely curved in the outer peripheral side of the case 3 and the-Z direction of the case 3, inside.

As shown in fig. 6, each of the flexible printed boards 6A and 6B includes: a first portion 601 extending in the +y direction from the-Z direction end portions of the first camera module 2A and the second camera module 2B; a second portion 602 curved in an arc shape in the-Z direction from the first portion 601; and a third portion 603 extending from the second portion 602 toward the-Z direction of the substrate 5 and connected to the substrate 5. The lower end of the second portion 602 bent in a semicircular shape is located in the-Z direction of the end of the +y direction of the substrate 5. The third portion 603 includes: an inclined portion 604 inclined in a direction toward the +z direction as going toward the-Y direction; and a flat portion 605 extending in the Y-axis direction along the surface of the substrate 5 from the-Y-direction end of the inclined portion 604, the flat portion 605 being provided with a connector portion 606 at the front end thereof.

Two connector attaching/detaching portions 607 (see fig. 10) aligned in the X-axis direction are provided at the-Y-direction end portions of the substrate 5. The connector portions 606 provided at the distal ends of the third portions 603 of the flexible printed boards 6A and 6B are detachably fitted into the connector attaching/detaching portions 607 of the board 5, and the terminals provided in the connector portions 606 are brought into contact with the board-side terminals provided in the connector attaching/detaching portions 607 to be electrically connected. Thus, the first camera module 2A and the second camera module 2B are connected to the substrate 5.

(Universal frame mechanism)

The gimbal frame 14 is formed of a plate spring made of metal. As shown in fig. 3, the gimbal frame 14 includes: a rectangular frame 140 located in the-Z direction of the movable body 10; a pair of first extension portions 141 protruding from the frame portion 140 to both sides in the first axial direction and extending in the +z direction (subject side); and a pair of second extension portions 142 protruding from the frame portion 140 to both sides in the second axial direction and extending in the +z direction (object side). The gimbal frame 14 includes an opening 143 penetrating the center of the frame 140 in the Z-axis direction.

The first extension portion 141 includes a first concave curved surface 144 recessed toward the movable body 10 side and toward the inner peripheral side in the first axial direction on the first axis R1. The first extension portion 141 includes a bending portion 145 that is bent from the front end in the +z direction to the outer peripheral side. The second extension portion 142 includes a second concave curved surface 146 recessed toward the movable body 10 side and toward the inner peripheral side in the second axial direction on the second axis R2. The second extension portion 142 includes a bending portion 147 that bends from the front end in the +z direction toward the outer peripheral side.

As shown in fig. 4, the second connection mechanism 16 connects the gimbal frame 14 and the housing 3 rotatably about the second axis R2 at a diagonal position in the second axis direction of the housing wall portion 32. The second gimbal frame receiving members 162 are fixed to a pair of recesses 161 provided on the inner peripheral surface of the housing wall 32 at diagonal positions in the second axial direction.

The second gimbal frame receiving member 162 includes a sphere 163 and a second thrust receiving member 164 that fixes the sphere 163. By fixing the second gimbal frame receiving member 162 to the recess 161 of the housing 3, the position of the sphere 163 on the second axis R2 is supported by the fixing body 11. When the gimbal mechanism 13 is assembled, the second extension 142 of the gimbal frame 14 is inserted into the inner peripheral side of the second gimbal frame receiving member 162, and the spherical body 163 is brought into point contact with the second concave curved surface 146 on the second axis R2. Thereby, the second connection mechanism 16 is constituted. At this time, the second extension portion 142 is inserted by being deflected toward the inner peripheral side, and therefore the second extension portion 142 is biased toward the outer peripheral side. Accordingly, the second concave curved surface 146 and the sphere 163 can maintain a point-contact state.

The second thrust receiving member 164 includes a pair of arm portions 165 (see fig. 3) bent inward on both sides of the spherical body 163 in the circumferential direction, and the second extension portion 142 is held between the pair of arm portions 165. The bending portion 147 provided at the distal end of the second extension portion 142 is locked to the distal end of the second thrust receiving member 164 in the +z direction. Thereby, the gimbal frame 14 is prevented from falling off from the second gimbal frame receiving part 162 in the-Z direction.

The first connection mechanism 15 connects the gimbal frame 14 and the rotation support mechanism 12 rotatably about the first axis R1 with respect to the movable body 10 on both sides in the first axis direction. The first connection mechanism 15 is disposed in a pair of concave portions 154 provided at diagonal positions in the first axial direction on the inner peripheral surface of the housing wall portion 32.

First gimbal receiving members 151 fixed to the rotation support mechanism 12 are arranged on both sides in the first axial direction with respect to the movable body 10. As will be described later, the rotation support mechanism 12 includes a rotation support frame 60 surrounding the movable body 10, and the first gimbal frame receiving member 151 is fixed to the rotation support frame 60. As shown in fig. 4, the first gimbal receiving member 151 includes a ball 152 and a first thrust receiving member 153 that fixes the ball 152. By fixing the first thrust receiving member 153 to the rotary support frame 60, the position of the ball 152 on the first axis R1 is supported by the rotary support mechanism 12.

When the gimbal mechanism 13 is assembled, the first extension portion 141 of the gimbal frame 14 is inserted into the inner peripheral side of the first gimbal frame receiving member 151, and the first concave curved surface 144 is brought into point contact with the sphere 152 on the first axis R1. Thereby, the first connecting mechanism 15 is constituted. At this time, since the first extension portion 141 is inserted by being deflected to the inner peripheral side, the first extension portion 141 is biased to the outer peripheral side. Accordingly, the first concave curved surface 144 and the sphere 152 provided on the first extension portion 141 can maintain a point-contact state.

The first thrust receiving member 153 includes a pair of arm portions 155 (see fig. 3 and 7) bent inward on both sides in the circumferential direction of the ball 152, and the first extension portion 141 is held between the pair of arm portions 155. The bent portion 145 provided at the front end of the first extension portion 141 is locked to the front end of the first thrust receiving member 153 in the +z direction. Thereby, the gimbal frame 14 can be prevented from falling off from the first gimbal frame receiving part 151 in the-Z direction.

(Movable body)

Fig. 7 is an exploded perspective view of the rotary support mechanism 12 and the movable body 10 as viewed from the object side (+z direction). Fig. 8 is an exploded perspective view of the rotary support mechanism 12 and the movable body 10 as viewed from the opposite side of the subject (-Z direction). The movable body 10 includes first and second camera modules 2A and 2B arranged in the X-axis direction, and a camera holder 50 that holds the first and second camera modules 2A and 2B.

As shown in fig. 7, the first camera module 2A includes: a camera module main body portion 24A having a rectangular shape as viewed from the Z-axis direction; and a lens barrel portion 25A protruding in the +z direction from the center of the camera module main body portion 24A. The second camera module 2B includes: a camera module main body portion 24B having a rectangular shape as viewed from the Z-axis direction; and a lens barrel portion 25B protruding in the +z direction from the center of the camera module main body portion 24B.

The camera holder 50 is made of resin. As shown in fig. 7 and 8, the camera holder 50 includes: a rectangular holder bottom 51 having the X-axis direction as a longitudinal direction; a holder side plate portion 52 extending in the +z direction from the outer edge of the holder bottom portion 51; a holder upper plate portion 53 connected to an end portion of the holder side plate portion 52 in the +z direction; and a partition wall 54 connecting the holder bottom 51 and the holder upper plate 53 and extending in the Y-axis direction. The camera holder 50 accommodates the first camera module 2A in the +x direction of the partition wall 54 and accommodates the second camera module 2B in the-X direction of the partition wall 54.

As shown in fig. 4, the first camera module 2A has larger dimensions in the X-axis direction and the Y-axis direction than the second camera module 2B when viewed from the Z-axis direction. Therefore, the partition wall 54 is disposed at a position offset in the-X direction from the center of the camera holder 50 in the X-axis direction. As shown in fig. 5, the height of the second camera module 2B in the Z-axis direction is lower than that of the first camera module 2A. The second camera module 2B is supported from the-Z direction by two convex portions 55 protruding from the holder bottom 51 to the +z direction in the-X direction of the partition wall 54.

As shown in fig. 4, the first camera module 2A is positioned in the X-axis direction by the camera module body portion 24A abutting against the inner peripheral surface of the holder side plate portion 52 and the partition wall 54 in the X-axis direction. The camera module main body portion 24A is positioned in the Y-axis direction by abutting the inner peripheral surface of the holder side plate portion 52 in the Y-axis direction. Similarly, the second camera module 2B is positioned in the X-axis direction by the camera module body portion 24B abutting the inner peripheral surface of the holder side plate portion 52 and the partition wall 54 in the X-axis direction. The camera module main body 24B is positioned in the Y-axis direction by abutting the inner peripheral surface of the holder side plate 52 in the Y-axis direction.

As shown in fig. 7 and 8, the camera holder 50 includes a camera module insertion port 56 that opens in the +y direction. The holder side plate portion 52 surrounds both sides of the first camera module 2A and the second camera module 2B in the X-axis direction and the-Y direction, but does not surround the +y direction of the first camera module 2A and the second camera module 2B.

The camera module insertion port 56 is divided into two parts in the X-axis direction by the partition wall 54. The camera module insertion port 56 includes: a first insertion port 56A that opens in the +x direction of the partition wall 54 to the +y direction; and a second insertion port 56B that opens in the +y direction in the-X direction of the partition wall 54. When the first camera module 2A and the second camera module 2B are assembled to the camera holder 50, the first camera module 2A is inserted from the first insertion port 56A, and the second camera module 2B is inserted from the second insertion port 56B.

The flexible printed boards 6A and 6B are connected to the-Z-direction end portions of the +y-direction side surfaces of the first camera module 2A and the second camera module 2B. When the first camera module 2A and the second camera module 2B are assembled to the camera holder 50, the flexible printed boards 6A and 6B are pulled out from the camera module insertion ports 56 (the first insertion port 56A and the second insertion port 56B) in the +y direction of the camera holder 50 (see fig. 3).

As shown in fig. 7 and 8, the holder upper plate portion 53 includes upper plate opening portions 57A and 57B cut in the-Y direction on both sides of the partition wall 54 in the X axis direction. When the first camera module 2A and the second camera module 2B are assembled to the camera holder 50, the lens barrel portion 25A of the first camera module 2A protrudes in the +z direction from the upper plate opening 57A, and the lens barrel portion 25B of the second camera module 2B protrudes in the +z direction from the upper plate opening 57B (see fig. 5). As shown in fig. 7, the upper plate opening 57A extends to the +y-direction edge of the holder upper plate 53, and is connected to the first insertion port 56A of the camera module insertion port 56. The upper plate opening 57B extends to the +y-direction edge of the holder upper plate 53, and is connected to the second insertion port 56B of the camera module insertion port 56.

By forming the upper plate openings 57A and 57B to be connected to the camera module insertion port 56, even when the first camera module 2A and the second camera module 2B are assembled to the camera holder 50 from the +y direction, the lens barrel portion 25A and the lens barrel portion 25B can be assembled in a state protruding in the +z direction of the holder upper plate portion 53.

As shown in fig. 4 and 8, the first magnet 21M, the second magnet 22M, and the third magnet 23M are fixed to the outer peripheral surface of the holder side plate portion 52. The first magnet 21M is fixed to a side face facing the-Y direction, and is opposed to the first coil 21C in the X-axis direction. The second magnet 22M is fixed to a side face facing the +x direction, and is opposed to the second coil 22C in the Y-axis direction. The first magnet 21M and the second magnet 22M are magnetized to two poles in the Z-axis direction. The third magnet 23M is fixed on a side face facing the-X direction, opposite to the third coil 23C in the Y-axis direction. The third magnet 23M is magnetized to two poles in the circumferential direction.

As shown in fig. 7 and 8, the camera holder 50 includes two rotation restricting protrusions 58 protruding in the-Z direction from the holder bottom 51. Further, the camera holder 50 is provided with movable body side contact portions 59A and 59B which are in point contact with the rotation support mechanism 12 at two positions on the rotation axis L0. As shown in fig. 5, 7, and 8, the movable body side contact portions 59A and 59B include a spherical body 591 and a circular plate 592 to which the spherical body 591 is fixed, respectively.

As shown in fig. 7, the circular plate 592 of the movable body side contact portion 59A is fitted into the inner side of the circular arc rib 593 formed in the holder upper plate portion 53. Thereby, the ball 591 of the movable body side contact portion 59A is positioned on the rotation axis L0. As shown in fig. 8, the circular plate 592 of the movable body side contact 59B is fitted into the circular arc rib 594 formed in the holder bottom 51. Thereby, the ball 591 of the movable body side contact portion 59B is positioned on the rotation axis L0.

(rotation support mechanism)

The rotation support mechanism 12 includes a rotation support frame 60 configured to surround the outer periphery of the camera holder 50. As shown in fig. 7 and 8, the rotary support frame 60 is configured by assembling two members, i.e., a first member 60A and a second member 60B. The first member 60A and the second member 60B are formed by bending a metal plate made of a non-magnetic metal. The first member 60A includes: a first plate portion 61 overlapping the camera holder 50 from the +z direction; a second plate portion 62 overlapping the camera holder 50 from the-Z direction; and a connection plate 63 disposed on the outer peripheral side of the camera holder 50 and connecting the first plate 61 and the second plate 62.

The first plate portion 61 includes: a first edge portion 611 extending in the X-axis direction along the-Y-direction edge of the holder upper plate portion 53; a second edge portion 612 extending in the Y-axis direction along the +x-direction edge of the holder upper plate portion 53; and a third edge portion 613 extending in the Y-axis direction along the edge of the-X direction of the holder upper plate portion 53. The first plate portion 61 includes a first contact portion forming portion 614 protruding in the +y direction from a position offset in the-X direction from the center of the first edge portion 611 in the X axis direction. Cut portions 615A, 615B cut in the-Y direction are formed on both sides of the first contact portion forming portion 614 in the X-axis direction.

The connection plate 63 is bent at a substantially right angle from a position offset in the-X direction from the center of the outer edge of the first plate 61 in the-Y direction, and extends in the-Z direction. As shown in fig. 4, a recess 520 is formed in the outer peripheral surface of the camera holder 50 in the-Y direction so as to recess a portion in the +y direction closer to the-X direction than the partition wall 54, and the connection plate 63 is disposed on the outer peripheral side of the recess 520.

The second plate portion 62 includes: an arm portion 621 bent at a substantially right angle from an end portion of the connection plate portion 63 in the-Z direction and extending in the +y direction; and a second contact portion forming portion 622 extending from the front end of the arm portion 621 in the +x direction. As shown in fig. 7, the tip end of the second contact point portion forming portion 622 is opposite to the tip end of the first contact point portion forming portion 614 provided on the first plate portion 61 in the Z-axis direction.

The first member 60A includes: a first contact portion 64A (see fig. 5 and 8) that is in point contact with the camera holder 50 from the +z direction; and a second contact portion 64B (see fig. 5 and 7) that is in point contact with the camera holder 50 from the-Z direction. As shown in fig. 7, the first contact portion 64A is a concave curved surface recessed in the +z direction, and is formed at the tip of the first contact portion forming portion 614. The second contact portion 64B is a concave curved surface recessed in the-Z direction, and is formed at the tip of the second contact portion forming portion 622.

When the first member 60A is assembled to the camera holder 50, the first plate portion 61 and the second plate portion 62 are bent to expand the interval between the first contact portion 64A and the second contact portion 64B, and the movable body side contact portions 59A and 59B of the camera holder 50 are arranged between the first contact portion 64A and the second contact portion 64B. As shown in fig. 5, the ball 591 of the movable body side contact portion 59A and the first contact portion 64A are in point contact on the rotation axis L0, and the ball 591 of the movable body side contact portion 59B and the second contact portion 64B are in point contact on the rotation axis L0 by a restoring force of the first plate portion 61 and the second plate portion 62 from the deflected shape to the original shape. Thereby, the camera holder 50 is supported by the first member 60A so as to be rotatable about the rotation axis L0.

As shown in fig. 4, in the present embodiment, the rotation axis L0 of the movable body 10 is located on a straight line connecting the optical axis L1 of the first camera module 2A and the optical axis L2 of the second camera module 2B. That is, the movable body 10 is configured such that the movable body side contact portions 59A and 59B are located on a straight line connecting the optical axis L1 of the first camera module 2A and the optical axis L2 of the second camera module 2B when viewed from the Z axis direction, and the movable body side contact portions 59A and 59B are located between the optical axes L1 and L2 when viewed from the Z axis direction.

As shown in fig. 5, in the present embodiment, since the first contact portion 64A and the second contact portion are in contact with the camera holder 50 from both sides in the Z-axis direction, the first contact portion 64A is located at a position in the +z direction than the center of gravity G of the movable body 10, and the second contact portion 64B is located at a position in the-Z direction than the center of gravity G of the movable body 10. In the present embodiment, the center of gravity G of the movable body 10 is located closer to the first camera module 2A than the partition wall 54.

As shown in fig. 5, barrel portions 25A, 25B protruding in the +z direction from upper plate opening portions 57A, 57B of camera holder 50 are arranged in cutout portions 615A, 615B of first plate portion 61, and protruding in the +z direction of first plate portion 61. As shown in fig. 1 and 2, the cutout portions 615A and 615B of the rotation support frame 60 are expanded in the-Y direction more than the upper plate opening portions 57A and 57B of the camera holder 50. The shape of the cutout portions 615A, 615B is as follows: when the movable body 10 rotates within a range of ±3° with respect to the rotation support frame 60 about the rotation axis L0, the edges of the cutout portions 615A, 615B do not interfere with the barrel portions 25A, 25B.

The second member 60B includes: a third plate portion 65 overlapping the second plate portion 62 from the-Z direction; a pair of connecting plate portions 66 bent substantially at right angles from both ends of the third plate portion 65 in the first axial direction and extending in the +z direction; and a pair of connecting plate portions 67 bent substantially at right angles from both ends of the third plate portion 65 in the second axial direction and extending in the +z direction. The +z-direction distal ends of the pair of connecting plate portions 66 are fixed to both ends of the first plate portion 61 in the first axial direction by welding. The front ends in the +z direction of the pair of connecting plate portions 67 are fixed to both ends in the second axial direction of the first plate portion 61 by welding. Thereby, the rotary support frame 60 is formed in a shape surrounding the outer periphery of the camera holder 50.

In this way, the rotary support frame 60 is configured by assembling the two members, i.e., the first member 60A and the second member 60B, by welding, and is configured in such a manner that four portions, i.e., the diagonal positions of the first plate portion 61 and the third plate portion 65 in the first axis direction and the diagonal positions in the second axis direction, are connected by the connecting plate portions 66 and 67 extending in the Z axis direction. Therefore, the rigidity of the whole is high. On the other hand, since the first contact portion 64A and the second contact portion 64B that support the movable body 10 are both provided on the first member 60A, the positional accuracy of the first contact portion 64A and the second contact portion 64B is high. Therefore, the rotary support frame 60 and the movable body 10 can be assembled with high positional accuracy.

The second member 60B is formed with an arc groove 68 penetrating the third plate portion 65. The circular arc groove 68 has a circular arc shape centered on the rotation axis L0. When the first member 60A and the second member 60B are assembled, the two rotation restricting protrusions 58 protruding in the-Z direction from the holder bottom 51 of the camera holder 50 held by the first member 60A are arranged in the circular arc groove 68. As shown in fig. 7, the rotation restricting protrusion 58 protrudes from the circular arc groove 68 in the-Z direction of the third plate portion 65. The two rotation restricting protrusions 58 are disposed near the circumferential ends of the circular arc groove 68. When the movable body 10 rotates relative to the fixed body 11 about the rotation axis L0, the rotation limiting protrusion 58 abuts on both circumferential ends of the circular arc groove 68, thereby limiting the rotation range of the movable body 10.

The first gimbal frame receiving members 151 constituting the first link mechanism 15 of the gimbal mechanism 13 are fixed to a pair of link plate portions 66 disposed at both ends of the rotation support frame 60 in the first axial direction. When the gimbal mechanism 13 is assembled, the first extension portion 141 of the gimbal frame 14 is deflected to the inner peripheral side and interposed between the first gimbal frame receiving member 151 and the connecting plate portion 66.

(method of assembly)

Fig. 9 is an exploded perspective view of the intermediate product 100 and the camera module as viewed from the object side (+z direction). Fig. 10 is an exploded perspective view of the intermediate product 100 and the camera module as viewed from the opposite side of the subject (-Z direction). When the optical unit 1 with the shake correction function is assembled, the camera holder 50 and the rotary support frame 60 before the first camera module 2A and the second camera module 2B are assembled and mounted constitute the rotary support mechanism 12. The first magnet 21M, the second magnet 22M, and the third magnet 23M are fixed to the camera holder 50. Next, the housing 3 and the rotary support frame 60 are connected by the gimbal mechanism 13. The first coil 21C, the second coil 22C, the third coil 23C, the flexible printed boards 7A, 7B, and 7C, and the board 5 are fixed to the case 3 from the outer peripheral side. As a result, as shown in fig. 9 and 10, an intermediate product 100 is obtained in which the housing 3, the camera holder 50, the rotation support mechanism 12, the gimbal mechanism 13, the shake correction magnetic drive mechanism 20, and the roll correction magnetic drive mechanism 23 are assembled.

In the intermediate product 100, the coupling plate portions 66, 67 of the rotary support frame 60 are arranged at positions that do not interfere with the camera module insertion port 56. The housing 3 includes a housing cutout 36 disposed on the outer peripheral side of the camera module insertion port 56, and the first extension portion 141 and the second extension portion 142 of the gimbal frame 14 are disposed at positions not interfering with the housing cutout 36 and the camera module insertion port 56. Therefore, as shown in fig. 9 and 10, the intermediate product 100 is fixed to the camera holder 50 by inserting the first camera module 2A and the second camera module 2B into the camera holder 50 from the outer peripheral side of the housing 3.

Next, the flexible printed boards 6A and 6B led out from the case cutout 36 in the +y direction are bent in the-Z direction, and extend in the opposite direction (-Y direction) of the board 5 in the-Z direction, and the connector 606 provided at the tip is fitted into the connector attaching/detaching portion 607 of the board 5. Finally, the subject side cover 41 is covered with the case 3 and the flexible printed boards 6A, 6B from the +z direction, and the subject opposite side cover 42 is covered with the substrate 5 and the flexible printed boards 6A, 6B from the-Z direction, thereby completing the optical unit 1 with the shake correction function.

(main effects of the present embodiment)

As described above, the optical unit 1 with a shake correction function according to the present embodiment includes: a movable body 10 having a camera holder 50 for holding the first camera module 2A and the second camera module 2B; a fixed body 11; a rotation support mechanism 12 that supports the movable body 10 with respect to the fixed body 11 so as to be rotatable about a rotation axis L0 along the optical axes L1, L2 of the first camera module 2A and the second camera module 2B; a gimbal mechanism 13 that rotatably supports the movable body 10 with respect to the fixed body 11 about a first axis R1 intersecting the rotation axis L0, and rotatably supports the movable body about a second axis R2 intersecting the rotation axis L0 and intersecting the first axis R1; and a substrate 5 connected to the first camera module 2A and the second camera module 2B via flexible printed boards 6A and 6B. The fixed body 11 includes a housing 3 accommodating the movable body 10, the rotation support mechanism 12, and the gimbal mechanism 13, and the substrate 5 is disposed in the-Z direction (opposite side of the subject) of the housing 3. The flexible printed boards 6A and 6B have: a first portion 601 which is led out in the +y direction (direction intersecting the rotation axis L0) from the first camera module 2A and the second camera module 2B and extends toward the outer peripheral side of the housing 3; a second portion 602 curved from the first portion 601 in the-Z direction (subject opposite side); and a third portion 603 extending from the second portion 602 in the-Z direction (subject opposite side) of the substrate 5 and then connected to the substrate 5.

In the present embodiment, the flexible printed boards 6A and 6B led out to the outer peripheral side of the case 3 housing the rotation support mechanism 12 and the gimbal mechanism 13 are bent and connected to the board 5 arranged in the-Z direction (the opposite side of the subject) of the case 3. Accordingly, the flexible printed boards 6A and 6B are stretched and wound in a largely curved shape and have a small spring constant, so that the rotational load of the movable body 10 can be reduced, and power saving can be achieved. In addition, the space between the first portion 601 and the third portion 603 of the flexible printed boards 6A, 6B is used as a space in which the case bottom 31 and the members constituting the rotation support mechanism 12 and the gimbal mechanism 13 are arranged. Therefore, dead zones caused by pulling the flexible printed boards 6A and 6B into a shape in which the rotational load of the movable body 10 is small can be reduced. Therefore, the optical unit 1 with the shake correction function can be suppressed from being enlarged.

In the present embodiment, the rotation support mechanism 12 includes a rotation support frame 60 disposed on the-Z direction (subject opposite side) and outer peripheral side of the camera holder 50. The gimbal mechanism 13 includes: a gimbal frame 14 having: a frame 140, a pair of first extension portions 141, and a pair of second extension portions 142, the frame 140 being disposed in a-Z direction (subject opposite side) of the camera holder 50 and the rotary support frame 60, the pair of first extension portions 141 extending from the frame 140 in a +z direction (subject side) and being disposed on both sides of the rotary support frame 60 in a first axial direction, and the pair of second extension portions 142 extending from the frame 140 in the Z axial direction (rotation axis direction) and being disposed on both sides of the rotary support frame 60 in a second axial direction; a first connection mechanism 15 that connects the pair of first extension portions 141 and the rotation support frame 60 to be rotatable about a first axis; and a second connection mechanism 16 that connects the pair of second extension portions 142 and the housing 3 to be rotatable about the second axis. In this way, by using the space between the first portion 601 and the third portion 603 of the flexible printed boards 6A, 6B as the space in which the frame portion 140 of the gimbal frame 14 and a part of the rotation support frame 60 (the third plate portion 65 and the second plate portion 62) are arranged, the dead space can be reduced. Further, since the gimbal frame 14 extends toward the outer periphery of the rotary support frame 60 and is connected to the connecting plate portion 66 of the rotary support frame 60 and the housing 3, the first axis R1 and the second axis R2 approach the center of gravity G of the movable body 10. Therefore, since the rotation load of the movable body 10 is small, power saving can be achieved.

In the present embodiment, the movable body 10 includes the first camera module 2A and the second camera module 2B arranged in the X-axis direction (first direction). The camera holder 50 includes a camera module insertion port 56 that opens in the +y direction (one side in the second direction). The housing 3 includes a housing cutout 36 located on the outer peripheral side of the camera module insertion port 56. The flexible printed boards 6A and 6B are led out in the +y direction (side in the second direction) of the housing 3 through the camera module insertion port 56 and the housing cutout 36. As described above, in the present embodiment, two camera modules can be easily assembled from the outer peripheral side of the housing 3. The flexible printed boards 6A and 6B can be stretched and wound into a shape that is greatly curved by the opening (the camera module insertion opening 56 and the housing cutout 36) for assembling the camera module from the outer peripheral side of the housing. In this way, the intermediate product 100 can be manufactured by first assembling the components (the camera holder 50, the rotation support mechanism 12, the gimbal mechanism 13, the shake correction magnetic drive mechanism 20, and the roll correction magnetic drive mechanism 23) other than the first camera module 2A and the second camera module 2B on the inner side of the housing 3, and the first camera module 2A and the second camera module 2B can be assembled on the intermediate product 100 from the outer side of the housing 3. Therefore, in the state of the intermediate product 100 before being finished, inspection of the rotation support mechanism 12, the gimbal mechanism 13, the shake correction magnetic drive mechanism 20, and the roll correction magnetic drive mechanism 23 can be performed.

The optical unit 1 with the shake correction function according to the present embodiment is provided with two camera modules, and is therefore useful when shooting is desired to be performed in different modes. For example, the present invention is useful when an image with a different focal distance is to be captured, when a still image is to be captured while a moving image is to be captured, or the like.

In the present embodiment, the fixing body 11 includes: an object side cover 41 covering the housing 3 from the +z direction (object side); and an object-side cover 42 covering the substrate 5 from the-Z direction (object-side). The object side cover 41 includes an object side cover protruding portion 45 protruding in the +y direction (i.e., the direction in which the flexible printed boards 6A, 6B are led out from the case 3). The subject-opposite-side cover 42 includes a subject-opposite-side cover protruding portion 47 protruding in the-Z direction (subject-opposite side). The second portion 602 is housed inside the object side cover projection 45 and the object side cover projection 47. By forming such a cover shape, the flexible printed boards 6A and 6B led out to the outside of the case 3 can be protected and wound in a largely curved shape. The cover can be formed in a shape conforming to the outer shape of the case 3 on the side where the flexible printed boards 6A and 6B are not pulled around. Therefore, the optical unit 1 with the shake correction function can be suppressed from being enlarged.

In the present embodiment, the connector attaching/detaching portion 607 is provided on the substrate 5, and the connector portion 606 attached/detached to/from the connector attaching/detaching portion 607 is provided at the front ends of the flexible printed boards 6A, 6B. Therefore, by merely fitting the distal ends of the flexible printed boards 6A, 6B into the connector attaching/detaching portion 607, the work of pulling and winding the flexible printed boards 6A, 6B into the target shape to connect with the board 5 can be completed, and thus the assemblability is good.

The rotary support frame 60 of the present embodiment includes: a first plate portion 61 overlapping the camera holder 50 from the +z direction (subject side); a second plate portion 62 overlapped with the camera holder 50 from the-Z direction (subject opposite side); and a connection plate 63 disposed on the outer peripheral side of the camera holder 50 and connecting the first plate 61 and the second plate 62. The first plate portion 61 includes a first contact portion 64A that is in point contact with the camera holder 50 in the +z direction (subject side) on the rotation axis L0, and the second plate portion 62 includes a second contact portion 64B that is in point contact with the camera holder 50 in the-Z direction (subject side) on the rotation axis L0. In this way, when the camera holder 50 is supported at two points on the rotation axis L0, the large movable body 10 can be stably supported. Therefore, the rocking of the movable body 10 can be suppressed, and the rotational position of the movable body 10 can be easily controlled. Further, since the second contact portion 64B and the second plate portion 62 are arranged in the space between the first portion 601 and the third portion 603 of the flexible printed boards 6A, 6B, dead space generated by pulling the flexible printed boards 6A, 6B into a shape having a small spring constant is small.

Here, the first plate portion 61, the second plate portion 62, and the connection plate portion 63 of the rotation support frame 60 are provided on the first member 60A as the same member. The first plate portion 61 includes a first contact portion 64A, and the second plate portion 62 includes a second contact portion 64B. In this way, by providing the two contact portions on the same member, the positional accuracy of the two contact portions can be improved. This can improve the assembly accuracy of the rotation support mechanism 12 and the movable body 10, and can improve the positional accuracy of the rotation axis L0 and each part of the movable body 10. Therefore, the shake correction can be performed with high accuracy.

In the present embodiment, the rotary support frame 60 includes: a third plate portion 65 overlapping the second plate portion 62 from the-Z direction (subject opposite side); and a plurality of connecting plate portions 66, 67 disposed on the outer peripheral side of the camera holder 50 and connecting the first plate portion 61 and the third plate portion 65. The third plate portion 65 includes an arc groove 68, and the camera holder 50 includes a rotation restricting protrusion 58 protruding in the-Z direction (opposite side of the subject) and disposed in the arc groove 68. Such a rotation support frame 60 is a frame-like structure surrounding the outer periphery of the camera holder 50, and therefore has high overall rigidity. Therefore, even if the weight of the movable body 10 is large, stable support can be performed. Further, the arcuate groove 68 and the rotation restricting projection 58 can constitute a stopper mechanism for restricting the rotation range of the movable body 10, and can suppress the movable body 10 from falling off from the rotation support mechanism 12 due to an impact such as a drop, so that the impact resistance is high. Further, since the third plate portion 65 and the rotation restricting convex portion 58 are disposed in the space between the first portion 601 and the third portion 603 of the flexible printed boards 6A and 6B, dead space generated by pulling the flexible printed boards 6A and 6B into a shape having a small spring constant is small.

(other embodiments)

(1) In the above-described embodiment, the movable body 10 is provided with two camera modules, but the present invention can be applied to a configuration in which the movable body 10 is provided with one camera module. In this case, the rotation support mechanism may be configured differently from the above. For example, the movable body may be rotatably supported by being in contact with the camera holder or the lens barrel from the outer peripheral side. Alternatively, a structure may be adopted in which a rotation support mechanism is provided on the opposite side of the movable body 10 to the subject.

(2) The above-described embodiment has the frame portion 140 of the gimbal frame 14 arranged in the-Z direction (the opposite side of the subject) of the movable body 10 and the rotation support frame 60, but the gimbal frame 14 may be configured to be opposite to the present embodiment in the Z-axis direction. That is, the gimbal frame 14 may be configured to include: a frame 140 disposed in the +z direction (subject side) of the rotation support frame 60; a pair of first extending portions 141 extending from the frame portion 140 in the-Z direction and disposed on both sides of the rotation support frame 60 in the first axial direction; and a pair of second extending portions 142 extending from the frame portion 140 in the-Z direction and disposed on both sides of the rotation support frame 60 in the second axial direction.

Symbol description

1: an optical unit having a shake correction function; 2A: a first camera module; 2B: a second camera module; 3: a housing; 4: a cover; 5: a substrate; 6A, 6B: a flexible printed substrate; 7A, 7B, 7C: a flexible printed substrate; 8A, 8B: a lens; 10: a movable body; 11: a fixed body; 12: a rotary support mechanism; 13: a gimbal mechanism; 14: a gimbal frame; 15: a first connection mechanism; 16: a second connection mechanism; 17: a magnetic plate; 20: a magnetic driving mechanism for shake correction; 21: a first shake correction magnetic drive mechanism; 21C: a first coil; 21M: a first magnet; 22: a second shake correction magnetic drive mechanism; 22C: a second coil; 22M: a second magnet; 23: a magnetic driving mechanism for rolling correction; 23C: a third coil; 23M: a third magnet; 24A, 24B: a camera module main body; 25A, 25B: a lens barrel section; 31: the bottom of the shell; 32: a housing wall portion; 33a: a first coil fixing hole; 33: a first wall; 34a: a second coil fixing hole; 34: a second wall; 35a: a third coil fixing hole; 35: a third wall; 36: a housing cutout portion; 41: a subject side cover; 42: a subject-side cover; 43: a cover upper plate portion; 44: a cover side plate portion; 45: a subject side cover protruding portion; 46: a cover bottom plate portion; 47: a subject-side-opposite-cover projection; 48: a cover rim portion; 50: a camera holder; 51: the bottom of the retainer; 52: a holder side plate portion; 53: a retainer upper plate portion; 54: a partition wall; 55: a convex portion; 56: a camera module insertion port; 56A: a first insertion port; 56B: a second insertion port; 57A, 57B: an upper plate opening portion; 58: a rotation restricting protrusion; 59A, 59B: a movable body side contact portion; 60: rotating the support frame; 60A: a first component; 60B: a second component; 61: a first plate portion; 62: a second plate portion; 63: a connection plate portion; 64A: a first contact portion; 64B: a second contact portion; 65: a third plate portion; 66. 67: a connecting plate portion; 68: an arc groove; 100: an intermediate product; 140: a frame portion; 141: a first extension setting portion; 142: a second extension portion; 143: an opening portion; 144: a first concave curved surface; 145: a bending portion; 146: a second concave curved surface; 147: a bending portion; 151: a first gimbal frame receiving member; 152: a sphere; 153: a first thrust receiving member; 154: a concave portion; 155: an arm section; 161: a concave portion; 162: a second gimbal frame receiving member; 163: a sphere; 164: a second thrust receiving member; 165: an arm section; 431: an oblong recess; 432A, 432B … circular openings; 451 … upper plate projections; 452 … side panel projections; 471 … inclined portions; 472 … planar portions; 520 … recess; 591 … spheres; 592 and … circular plate; 593. 594 … arcuate ribs; 601 … first part; 602 … second part; 603 … third part; 604 … inclined portions; 605 … planar portion; 606 … connector portion; 607 … connector attachment/detachment portions; 611 … first edge portion; 612 … second edge portion; 613 … third edge portions; 614 … first contact portion forming portions; 615A, 615B … cut-outs; 621 … arm; 622 … second contact portion forming portions; g … center of gravity; l0 … axis of rotation; l1, L2 … optical axes; r1 … first axis; r2 … second axis.

Claims

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

a movable body including a camera module and a camera holder for holding the camera module;

a fixed body;

a rotation support mechanism that supports the movable body with respect to the fixed body so as to be rotatable about a rotation axis along an optical axis of the camera module;

a gimbal mechanism that supports the movable body with respect to the fixed body so as to be rotatable about a first axis intersecting the rotation axis and so as to be rotatable about a second axis intersecting the rotation axis and intersecting the first axis; and

a substrate connected to the camera module via a flexible printed substrate,

the fixed body is provided with a shell for accommodating the movable body, the rotary supporting mechanism and the universal frame mechanism,

in the case where the direction along the rotation axis is the rotation axis direction, one side in the rotation axis direction is the object side of the camera module, and the other side in the rotation axis direction is the object opposite side,

the substrate is disposed on the opposite side of the subject of the housing,

The flexible printed board has: a first portion that is led out from the camera module in a direction intersecting the rotation axis and extends toward the outer peripheral side of the housing; a second portion curved from the first portion toward the opposite side of the subject; and a third portion extending from the second portion toward the opposite side of the subject of the substrate and connected to the substrate.

2. The optical unit with shake correction function according to claim 1, wherein,

the rotation support mechanism includes a rotation support frame disposed on the opposite side and the outer peripheral side of the camera holder with respect to the object,

the gimbal mechanism includes:

a gimbal frame having a frame portion disposed on the opposite side of the camera holder and the object of the rotary support frame, a pair of first extending portions extending from the frame portion toward the object side and disposed on both sides of the camera holder and the rotary support frame in the first axial direction, and a pair of second extending portions extending from the frame portion toward the rotation axis direction and disposed on both sides of the camera holder and the rotary support frame in the second axial direction;

A first connection mechanism that connects the pair of first extension portions and the rotation support frame to be rotatable about the first axis; and

and a second connection mechanism that connects the pair of second extension portions and the housing to be rotatable about the second axis.

3. The optical unit with shake correction function according to claim 1, wherein,

the movable body includes two camera modules arranged in a first direction intersecting the rotation axis direction,

the camera holder is provided with a camera module insertion opening which is opened at one side of a second direction crossing the rotation axis direction and crossing the first direction,

the housing has a housing cutout portion located on the outer peripheral side of the camera module insertion port,

the flexible printed board is led out to one side of the second direction of the housing through the camera module insertion opening and the housing cutout.

4. The optical unit with shake correction function according to claim 1, wherein,

the fixed body has: a subject side cover that covers the housing from the subject side; and an object-side cover that covers the substrate from the object-side,

The object side cover includes an object side cover projecting portion projecting in a direction in which the flexible printed board is drawn out from the case,

the object-side cover includes an object-side cover projecting portion projecting toward the object-side,

the second portion is housed inside the subject-side cover projection and the subject-opposite-side cover projection.

5. The optical unit with shake correction function according to claim 1, wherein,

comprises a connector mounting/dismounting portion mounted on the substrate,

a connector part which is assembled and disassembled relative to the connector assembling and disassembling part is arranged at the front end of the flexible printed circuit board.

6. The optical unit with shake correction function according to claim 2, wherein,

the rotary support frame includes:

a first plate portion overlapping the camera holder from the object side;

a second plate portion overlapping the camera holder from the opposite side of the subject; and

a connection plate portion which is disposed on the outer peripheral side of the camera holder and connects the first plate portion and the second plate portion,

The first plate portion includes a first contact portion that is in point contact with the camera holder from the object side on the rotation axis,

the second plate portion includes a second contact portion that is in point contact with the camera holder from the opposite side of the object on the rotation axis.

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

the rotary support frame includes:

a third plate portion overlapping the second plate portion from the object opposite side; and

a plurality of connecting plate parts which are arranged on the outer peripheral side of the camera holder and connect the first plate part and the third plate part,

the third plate part is provided with an arc groove,

the camera holder includes a rotation restricting protrusion protruding toward the opposite side of the subject and disposed in the circular arc groove.