JP2021086065A - Optical unit with shake correction function - Google Patents

Abstract

To prevent a gimbals frame from coming off and reduce the size of an optical unit with a shake correction function.SOLUTION: A movable body connection mechanism 11 for connecting a movable body 4 and a gimbals frame 10 so as to be rotatable around a first axis R1 brings a ball 15 fixed to a thrust receiving member 16 and a concave surface 19 provided to a support part 20 of the gimbals frame 10 into point contact. The thrust receiving member 16 is held to a holding part 13 provided in a holder 31 that encloses a camera module 3 and provided with an arm part 94 extending toward a side face 41 of the camera module 3. The arm part 94 overlaps the support part 20 as seen from the optical axis direction. A clearance M between the tip of the arm part 94 and the side face 41 in the first axis direction is narrower than a thickness dimension N of the support part 20 in the first axis direction. Therefore, the gimbals frame 10 is prevented from coming off utilizing the side face 41 of the camera module 3, so that the height size of the holder 31 can be reduced.SELECTED DRAWING: Figure 9

Description

The present invention relates to an optical unit with a runout correction function that connects a movable body and a fixed body by a gimbal mechanism.

In the optical unit mounted on the mobile terminal or mobile body, the movable body on which the camera module is mounted is rotated around a predetermined axis in order to suppress the disturbance of the captured image when the mobile terminal or mobile body is moved. Some are equipped with a mechanism for correcting runout. Patent Document 1 discloses this kind of optical unit with a runout correction function.

The optical unit with a runout correction function of Patent Document 1 includes a movable body, a fixed body, and a gimbal mechanism for connecting the movable body and the fixed body. The gimbal mechanism rotatably supports the movable body around a predetermined rotation axis. The gimbal mechanism includes a metal rectangular frame-shaped gimbal frame (spring member) and a connecting mechanism for connecting the gimbal frame to a movable body and a fixed body. The connection mechanism includes a metal sphere, a sphere fixing portion (joint portion) to which the sphere is fixed, and a sphere support portion having a hemispherical recess with which the sphere contacts.

In the gimbal mechanism, one of the sphere fixing portion and the sphere supporting portion is provided at a diagonal position on the rotation axis of the gimbal frame, and the other is provided at a diagonal position on the rotation axis of the movable body. The sphere support portion is configured by, for example, fixing a metal support member (thrust receiving member) having a hemispherical recess formed to the movable body and the fixed body.

Japanese Patent Application No. 2015-217432

When a mobile terminal or a moving body equipped with an optical unit with a runout correction function receives an impact from the outside, a load may be applied to the connection mechanism in the direction intersecting the rotation axis due to the weight of the moving body or the like. is there. That is, the connection mechanism may be loaded in the optical axis direction. Therefore, when an impact from the outside is received, the gimbal frame may bend and the sphere fixed to the sphere fixing portion may come off from the hemispherical recess provided in the sphere support portion. As a result, the gimbal frame may come off from the movable body and the fixed body, and the connection state between the gimbal frame and the movable body and the fixed body may be released.

The present inventor has proposed a pull-out prevention structure that regulates the gimbal frame from coming off the movable body and the fixed body in an optical unit with a runout correction function provided with a connection mechanism for rotatably connecting the gimbal frame and the movable body. There is. That is, the optical unit with a runout correction function of Japanese Patent Application No. 2019-197808 includes a case in which the movable body is made of resin and the fixed body is made of resin. The holder and the case are provided with a holding portion for holding a thrust receiving member having a hemispherical recess. The holding portion includes a recess in which the thrust receiving member is arranged and a facing wall portion facing the thrust receiving member arranged in the recess. In the holding portion, the arrangement of the facing wall portion is set so that the end portion of the gimbal frame provided with the hemispherical recess cannot pass through the gap between the thrust receiving member and the facing wall portion.

However, in the gimbal frame detachment prevention structure proposed in Japanese Patent Application No. 2019-197808, it is necessary to provide a recess and a facing wall portion in the holding portion, and the shape of the holding portion is complicated. Therefore, it is difficult to reduce the thickness of the holder and the case provided with the holding portion, which is disadvantageous in reducing the size of the optical unit with the shake correction function.

In view of these points, an object of the present invention is to prevent the gimbal frame from coming off and to reduce the size of the optical unit with a runout correction function.

In order to solve the above problems, the optical unit with a shake correction function of the present invention can swing a movable body including a camera module and the movable body around a first axis intersecting the optical axis of the camera module. A gimbal mechanism that supports the movable body and swingably supports the movable body around a second axis that intersects the optical axis and the first axis, and a fixed body that supports the movable body via the gimbal mechanism. The gimbal mechanism includes a gimbal frame and a movable body connecting mechanism for rotatably connecting the gimbal frame and the movable body around the first axis, and the movable body connecting mechanism includes a sphere and the sphere. The movable body includes a movable body side gimbal frame receiving member having a metal thrust receiving member fixed to the gimbal frame, and a movable body side supporting portion having a concave curved surface in contact with the sphere in the gimbal frame, and the movable body is the camera module. The holder includes a holder that surrounds the outer peripheral side of the gimbal, and the holder includes a holding portion that holds the movable body side gimbal frame receiving member at a position where the first axis passes through the center of the sphere, and is provided in a direction along the optical axis. Is the optical axis direction, and the direction along the first axis is the first axis direction, the movable body side gimbal frame receiving member includes an arm portion extending toward the outer peripheral surface of the camera module, and the arm. The portion overlaps the movable body side support portion when viewed from the optical axis direction, and the distance between the tip of the arm portion and the outer peripheral surface in the first axial direction is the first of the movable body side support portions. It is characterized in that it is narrower than the thickness dimension in the axial direction.

According to the present invention, the movable body connecting mechanism for rotatably connecting the movable body and the gimbal frame around the first axis is provided on a sphere provided on the movable body side gimbal frame receiving member and a movable body side support portion of the gimbal frame. It has a concave curved surface provided. Therefore, the movable body and the gimbal frame can be connected by bringing the sphere into point contact with the concave curved surface. Here, the movable body side gimbal frame receiving member is held by a holder that holds the camera module, and includes an arm portion that extends toward the outer peripheral surface of the camera module. The arm portion overlaps with the movable body side support portion of the gimbal frame when viewed from the optical axis direction. Further, the distance between the tip of the arm portion and the outer peripheral surface of the camera module in the first axial direction is narrower than the thickness dimension of the movable body side support portion in the first axial direction. Therefore, even if the gimbal frame bends when an impact is received from the outside and the concave curved surface provided on the movable body support portion is separated from the sphere in the first axial direction, the movable body side support portion is the arm portion and the camera module. Cannot pass through the gap with. Therefore, it is possible to prevent or suppress the gimbal frame from coming off the movable body.

Further, according to the present invention, the outer peripheral surface of the camera module is used as an opposing wall portion for preventing the gimbal frame from coming off. Therefore, since it is not necessary to form a wall for preventing the holder from coming off facing the movable body side gimbal frame receiving member, the holder can be made into a simple shape and the holder can be made thinner. Therefore, it is advantageous for miniaturization of the optical unit with the runout correction function.

In the present invention, the holder has a tubular shape, and the holder is provided with an overhanging portion that overhangs to the outer peripheral side at a diagonal position in the first axial direction, and the holding portion is formed inside the overhanging portion. Is preferable. In this way, the holding portion can be easily formed. Moreover, the structure of the holder can be simplified.

In the present invention, the overhanging portion includes a back wall portion that contacts the thrust receiving member in the first axial direction from the side opposite to the movable body side support portion, and the optical axis on both sides of the back wall portion in the circumferential direction. It is preferable that the pair of side wall portions extending in the direction and facing each other in the circumferential direction are provided, and the pair of side wall portions positions the movable body side support portion in the circumferential direction. In this way, the positional accuracy of the thrust receiving member in the circumferential direction can be improved. Further, when the movable body side gimbal frame receiving member is inserted into the holding portion, the pair of side wall portions can be used as the guide portion.

In the present invention, the holder preferably includes a positioning portion for positioning the thrust receiving member in the optical axis direction. In this way, the position accuracy of the sphere fixed to the thrust receiving member in the optical axis direction can be improved.

In the present invention, it is preferable that the holder is made of metal, the camera module is fitted on the inner peripheral side of the holder, and the thrust receiving member is welded to the holder. As described above, in the present invention, since the shape of the holder can be simplified, it can be made of metal. Therefore, the holder can be made thinner, and the optical unit with the runout correction function can be made smaller. Further, by fixing the thrust receiving member by welding, the fixing strength can be increased and the assembly time can be shortened.

In the present invention, it is preferable that the thrust receiving member protrudes from the end portion of the overhanging portion in the optical axis direction. In this way, the thrust receiving member can be easily fixed by welding.

In the present invention, when one of the optical axis directions is the first direction, the other of the optical axis directions is the second direction, and the circumference of the optical axis is the circumferential direction, the sphere is fixed to the thrust receiving member. The plate portion provided with the sphere fixing portion and facing the support portion in the first axial direction via the sphere, and the plate portion from both ends in the circumferential direction in the second direction from the sphere fixing portion of the plate portion. A pair of the arm portions projecting to the side where the support portion is located, and each of the pair of the arm portions is a projecting plate portion that bends in the first axial direction from the circumferential end of the plate portion. The projecting plate portion includes an extending plate portion that bends in the circumferential direction from the end opposite to the plate portion to the opposite side of the plate portion, and each of the pair of the arm portions has the extending plate portion. The installation plate portion faces the outer peripheral surface, and the separation distance between the extension plate portion and the outer peripheral surface in the first axial direction is narrower than the thickness dimension of the movable body side support portion in the first axial direction. preferable. By doing so, it is possible to increase the area where each arm portion and the outer peripheral surface of the camera module face each other in the first axis direction. Therefore, it is easy to prevent the movable body side support portion from passing through the gap between the arm portion and the camera module.

In the present invention, the fixed body side support portion includes a convex portion on which the concave curved surface is formed and an edge portion extending from the convex portion to both sides in the circumferential direction, and each of the pair of the arm portions has the optical axis. The protruding plate portion overlaps the edge portion when viewed from the direction, and the distance between the extending plate portion and the outer peripheral surface in the first axial direction is the distance between the movable body side support portion and the first axial direction. It is narrower than the thickness dimension, and the thickness dimension of the movable body side support portion in the first axial direction preferably includes the protrusion dimension of the convex portion in the first axial direction and the thickness dimension of the edge portion. In this way, even when the gimbal frame bends and the tip of the convex portion moves to a position where it hits the outer peripheral surface of the camera module when an impact is received from the outside, the movable body side support portion is provided by the protruding plate portion of the thrust receiving member. It is possible to prevent it from coming off in the second direction.

In the present invention, the edge portion is preferably formed concentrically around the convex portion. In this way, even if the gimbal frame is assembled so as to be tilted around the first axis, the protruding dimension of the edge portion in the circumferential direction does not change. Therefore, it is possible to prevent the movable body side support portion from coming off from the thrust receiving member due to the tilting of the gimbal frame.

In the present invention, the gimbal frame includes a first gimbal frame extension portion extending in the optical axis direction via between the pair of projecting plate portions, and the first gimbal frame extension portion is the first gimbal frame extension portion. The movable body side support portion is provided at the tip in the direction, and a passing portion located between the pair of protruding plate portions in the second direction of the movable body side support portion is provided, and the movable body side support portion is provided in the circumferential direction. The width dimension is preferably longer than the width dimension of the passing portion in the circumferential direction and longer than the distance between the pair of protruding plate portions. In this way, it is possible to prevent the movable body side support portion from coming off by the pair of protruding plate portions. Further, the extending portion of the second gimbal frame can be bent to generate an urging force, and the thrust receiving member can be temporarily fixed to the holding portion by the urging force. Therefore, it is easy to assemble.

In the present invention, the gimbal mechanism includes a fixed body connecting mechanism that rotatably connects the gimbal frame and the fixed body around the second axis, and the fixed body connecting mechanism is such that the sphere and the sphere are fixed. The fixed body side gimbal frame receiving member including the metal thrust receiving member and the fixed body side support portion having the concave curved surface in contact with the sphere in the gimbal frame are provided, and the fixed body is of the movable body. The case includes a case surrounding the outer peripheral side, the case includes a notch portion in which the position through which the second axis passes is cut out in the optical axis direction, and the fixed body side gimbal frame receiving member is arranged in the notch portion. It is preferable that the center of the sphere is held at a position where the second axis passes. In this way, even in the fixed body connecting mechanism, the same fixed body side gimbal frame receiving member as the movable body side gimbal frame receiving member used in the movable body connecting mechanism can be used. Therefore, it is possible to standardize the parts between the fixed body connecting mechanism and the movable body connecting mechanism.

In the present invention, it is preferable that the case is made of metal and the thrust receiving member provided on the fixed body side gimbal frame receiving member is welded to the case. In this way, the case can be made thinner, and the optical unit with the runout correction function can be made smaller. Therefore, even in the fixed body connecting mechanism, the thrust receiving member can be fixed by welding. Therefore, the fixing strength can be increased and the assembly time can be shortened.

According to the present invention, the movable body connecting mechanism for rotatably connecting the movable body and the gimbal frame around the first axis is provided on a sphere provided on the movable body side gimbal frame receiving member and a movable body side support portion of the gimbal frame. It has a concave curved surface provided. Therefore, the movable body and the gimbal frame can be connected by bringing the sphere into point contact with the concave curved surface. Here, the movable body side gimbal frame receiving member is held by a holder that holds the camera module, and includes an arm portion that extends toward the outer peripheral surface of the camera module. The arm portion overlaps with the movable body side support portion of the gimbal frame when viewed from the optical axis direction. Further, the distance between the tip of the arm portion and the outer peripheral surface of the camera module in the first axial direction is narrower than the thickness dimension of the movable body side support portion in the first axial direction. Therefore, even if the gimbal frame bends when an impact is received from the outside and the concave curved surface provided on the movable body support portion is separated from the sphere in the first axial direction, the movable body side support portion is the arm portion and the camera module. Cannot pass through the gap with. Therefore, it is possible to prevent or suppress the gimbal frame from coming off the movable body.

Further, according to the present invention, the outer peripheral surface of the camera module is used as an opposing wall portion for preventing the gimbal frame from coming off. Therefore, since it is not necessary to form a wall for preventing the holder from coming off facing the movable body side gimbal frame receiving member, the holder can be made into a simple shape and the holder can be made thinner. Therefore, it is advantageous for miniaturization of the optical unit with the runout correction function.

It is a perspective view of the optical unit with a runout correction function to which this invention is applied. It is a top view of the optical unit with a runout correction function with a cover removed. It is an exploded perspective view of the optical unit with a runout correction function. It is an exploded perspective view of the gimbal frame receiving member. It is a side view of a gimbal frame and a side view of a gimbal frame and a gimbal frame receiving member. It is a perspective view of the movable body connection mechanism. It is the figure which looked at the movable body connection mechanism from the camera module side (the figure which looked at the direction A of FIG. 6). It is a top view of the movable body connection mechanism. It is sectional drawing which cut the movable body connection mechanism along the 1st axis. It is the figure which looked at the fixed body connection mechanism from the outer peripheral side. It is sectional drawing which cut the fixed body connection mechanism along the 2nd axis. It is an exploded perspective view of the fixed body connection mechanism. It is a perspective view of the fixed body connection mechanism.

An embodiment of an optical unit with a runout correction function to which the present invention is applied will be described below with reference to the drawings.

(overall structure)
FIG. 1 is a perspective view of an optical unit with a runout correction function. FIG. 2 is a plan view of the optical unit with a shake correction function with the cover removed when viewed from the subject side. FIG. 3 is an exploded perspective view of an optical unit with a runout correction function. As shown in FIGS. 1 and 2, the optical unit 1 with a shake correction function includes a camera module 3 provided with an optical element such as a lens 2. The optical unit 1 with a shake correction function is mounted on, for example, a mobile phone with a camera, a photographing device such as a drive recorder, or an action camera or a wearable camera mounted on a moving body such as a helmet, a bicycle, or a radio-controlled helicopter. In these optical devices, if the optical device is tilted during shooting, the camera module 3 is tilted and the captured image is distorted. The optical unit 1 with a shake correction function corrects the tilt of the camera module 3 based on the acceleration, the angular velocity, the amount of shake, etc. detected by a detection means such as a gyroscope in order to avoid distortion of the captured image.

In the following description, the three axes orthogonal to each other are defined as the X-axis, the Y-axis, and the Z-axis. Further, the direction along the X-axis is the X-axis direction, one side of the X-axis direction is the −X direction, and the other side is the + X direction. The direction along the Y-axis is the Y-axis direction, one side of the Y-axis direction is the −Y direction, and the other side is the + Y direction. The direction along the Z axis is the Z axis direction, one side of 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 camera module 3. The −Z direction is one of the optical axis directions and is the first direction. The + Z direction is the other of the optical axis directions and is the second direction. Further, the −Z direction (first direction) is the image side of the camera module 3, and the + Z direction (second direction) is the subject side of the camera module 3.

As shown in FIG. 1, the optical unit 1 with a shake correction function includes a movable body 4 provided with a camera module 3, a gimbal mechanism 5 that rotatably supports the movable body 4, and a movable body 4 via the gimbal mechanism 5. A fixed body 6 for supporting the fixed body 6 and a runout correction drive mechanism 7 for swinging the movable body 4 with respect to the fixed body 6 are provided. The optical unit 1 with a shake correction function performs shake correction by swinging the movable body 4 around two axes that intersect the optical axis L of the camera module 3 and intersect with each other. In this example, the optical unit 1 with a shake correction function swings the movable body 4 around two axes orthogonal to the optical axis L of the camera module 3 and orthogonal to each other to perform shake correction. That is, in the optical unit 1 with a runout correction function, runout correction in the pitching direction and runout correction in the yawing direction are performed by performing runout correction around the X-axis and runout correction around the Y-axis.

The movable body 4 is rotatably supported around the first axis R1 orthogonal to the optical axis L by the gimbal mechanism 5, and is rotatably supported around the second axis R2 orthogonal to the optical axis L and the first axis R1. Be supported. The first axis R1 and the second axis R2 are tilted 45 degrees with respect to the X axis and the Y axis. By synthesizing the rotation around the first axis R1 and the rotation around the second axis R2, the movable body 4 rotates around the X axis and the Y axis. Hereinafter, the axial direction that coincides with the first axis R1 is referred to as the first axial direction, and the axial direction that coincides with the second axis R2 is referred to as the second axial direction.

As shown in FIGS. 2 and 3, the gimbal mechanism 5 includes a gimbal frame 10, a movable body connecting mechanism 11 provided diagonally on the first axis R1 of the movable body 4, and a second axis of the fixed body 6. A fixed body connecting mechanism 12 provided at a diagonal position on R2 is provided. The gimbal frame 10 is a metal leaf spring. The movable body connecting mechanism 11 rotatably connects the gimbal frame 10 and the movable body 4 around the first axis R1. The fixed body connecting mechanism 12 rotatably connects the gimbal frame 10 and the fixed body 6 around the second axis R2.

FIG. 4 is an exploded perspective view of the gimbal frame receiving member 17. FIG. 4A is an exploded perspective view seen from the outside in the radial direction, and FIG. 4B is an exploded perspective view seen from the inside in the radial direction. The movable body connecting mechanism 11 has a gimbal frame receiving member 17 including a metal sphere 15 and a metal thrust receiving member 16 to which the sphere 15 is fixed, and a concave curved surface 19 that contacts the sphere 15 in the gimbal frame 10. A support portion 20 and a support portion 20 are provided. The gimbal frame receiving member 17 is held by a holding portion 13 provided on the movable body 4. The fixed body connecting mechanism 12 has a gimbal frame receiving member 17 including a metal sphere 15 and a metal thrust receiving member 16 to which the sphere 15 is fixed, and a concave curved surface 19 that contacts the sphere 15 in the gimbal frame 10. A support portion 20 and a support portion 20 are provided. The gimbal frame receiving member 17 is held by a notch 14 provided in the fixed body 6. As shown in FIG. 4, the gimbal frame receiving member 17 is held so that the center of the sphere 15 is arranged on the first axis R1 or the second axis R2.

Here, the gimbal frame receiving member 17 held by the holding portion 13 of the movable body 4 is used as the movable body side gimbal frame receiving member, and the gimbal frame receiving member 17 held by the notch portion 14 of the fixed body 6 is used as the fixed body side gimbal frame. In the case of using the receiving member, since the movable body side gimbal frame receiving member and the fixed body side gimbal frame receiving member are the same members, they will be described with the same reference numerals 17. Further, in the gimbal frame 10, the support portion 20 having the concave curved surface 19 in contact with the gimbal frame receiving member 17 (movable body side gimbal frame receiving member) held by the movable body 4 is used as the movable body side support portion and is held by the fixed body 6. When the support portion 20 having a concave curved surface 19 in contact with the gimbal frame receiving member 17 (fixed body side gimbal frame receiving member) is used as the fixed body side support portion, the movable body side support portion and the fixed body side support portion have the same configuration. The present invention will be described with reference to the same reference numeral 20.

As shown in FIG. 2, the runout correction drive mechanism 7 includes a first magnetic drive mechanism 7X that generates a driving force that rotates the movable body 4 around the X axis, and a driving force that rotates the movable body 4 around the Y axis. A second magnetic drive mechanism 7Y is provided. The first magnetic drive mechanism 7X is arranged on the −Y direction side of the movable body 4. The second magnetic drive mechanism 7Y is arranged on the −X direction side of the movable body 4. As shown in FIG. 3, the first magnetic drive mechanism 7X includes a set of magnets 25X and coils 26X. The second magnetic drive mechanism 7Y includes a set of magnets 25Y and a coil 26Y. The magnet 25X and the coil 26X of the first magnetic drive mechanism 7X face each other in the Y-axis direction. The magnet 25Y and the coil 26Y of the second magnetic drive mechanism 7Y face each other in the X-axis direction. In this example, the magnets 25X and 25Y are arranged on the movable body 4, and the coils 26X and 26Y are arranged on the fixed body 6. The magnets 25X and 25Y can be arranged on the fixed body 6, and the coils 26X and 26Y can be arranged on the movable body 4.

(Movable body)
As shown in FIG. 3, the movable body 4 includes a camera module 3 and a frame-shaped holder 31 that surrounds the camera module 3. The camera module 3 has an octagonal main body 32 when viewed from the Z-axis direction, a lens barrel 33 protruding in the second direction from the central portion of the main body 32, and the main body 32 in the −Z direction. A substrate 34 is provided at the end. The camera module 3 includes a lens 2 held by the lens barrel 33 and an image sensor (not shown) mounted on the substrate 34. The image sensor is housed in the main body 32 and is arranged on the optical axis L of the lens 2. The main body 32 includes a plurality of projecting portions 30 projecting toward the outer peripheral side. Two protrusions 30 are formed on the side surface in the + Y direction and the end portion in the −Z direction on the side surface in the −Y direction.

The holder 31 has a first side plate portion 35 extending in the Y-axis direction along the side surface of the main body portion 32 of the camera module 3 in the −X direction of the camera module 3, and a holder 31 along the side surface of the main body portion 32 in the + X direction of the camera module 3. A second side plate portion 36 extending in the Y-axis direction is provided. Further, the holder 31 has a third side plate portion 37 extending in the X-axis direction along the side surface of the main body portion 32 in the −Y direction of the camera module 3, and an X along the side surface of the main body portion 32 in the + Y direction of the camera module 3. A fourth side plate portion 38 extending in the axial direction is provided. Further, the holder 31 has an overhanging portion 39 formed at a corner portion connecting the first side plate portion 35 and the third side plate portion 37 and a corner portion connecting the second side plate portion 36 and the fourth side plate portion 38. To be equipped. The overhanging portion 39 is located diagonally in the first axial direction and overhangs toward the outer peripheral side. Each overhanging portion 39 is provided with a holding portion 13 for holding the gimbal frame receiving member 17 (movable body side gimbal frame receiving member) of the movable body connecting mechanism 11. Each holding portion 13 is a recess formed on the inner peripheral side of the overhanging portion 39.

A magnet 25Y of the second magnetic drive mechanism 7Y is fixed to the outer surface of the first side plate portion 35. A magnet 25X is fixed to the outer surface of the third side plate portion 37. The holder 31 is made of a magnetic material and functions as a yoke for magnets 25X and 25Y. In this embodiment, the holder is a tubular member made of magnetic metal and is formed by deep drawing. The magnets 25X and 25Y are magnetized so that the magnetic poles of the surfaces facing outward in the radial direction are different with respect to the magnetizing polarization line extending in the circumferential direction in the center in the Z-axis direction.

The holder 31 includes a positioning recess 40 in which the edges of the third side plate portion 37 and the fourth side plate portion 38 in the −Z direction are cut out in the + Z direction. When assembling the movable body 4, the camera module 3 is inserted into the inside of the holder 31 from the −Z direction (image side). At that time, the protruding portion 30 of the camera module 3 is inserted into the positioning recess 40 of the holder 31, and the protruding portion 30 comes into contact with the edge of the positioning recess in the + Z direction. As a result, the camera module 3 is positioned in the Z-axis direction (optical axis direction) with respect to the holder 31.

(Fixed body)
As shown in FIGS. 1 and 3, the fixed body 6 covers the metal case 50, the first cover 8 that covers the case 50 from the + Z direction side, and the case 50 from the −Z direction side. It includes 2 covers 9. The fixed body 6 holds the coils 26X and 26Y fixed to the flexible printed circuit board 60. The case 50 has a rectangular frame shape that surrounds the outer peripheral side of the movable body 4. The case 50, the first cover 8, and the second cover 9 are made of non-magnetic metal. The case 50, the first cover 8, and the second cover 9 are fixed to each other by welding. The first cover 8 has a substantially rectangular opening. As shown in FIG. 1, in the optical unit 1 with a runout correction function, a part of the gimbal frame 10 projects in the + Z direction from the opening of the first cover 8. Further, the lens barrel portion 33 of the camera module 3 projects in the + Z direction from the central hole 73 provided in the center of the gimbal frame 10 in the radial direction.

The case 50 has a first frame portion 51 extending in the Y-axis direction in the −X direction of the movable body 4, a second frame portion 52 extending in the Y-axis direction in the + X direction of the movable body 4, and an X in the −Y direction of the movable body 4. A third frame portion 53 extending in the axial direction and a fourth frame portion 54 extending in the + Y direction of the movable body 4 in the X-axis direction are provided. In the case 50, a first inclined frame portion 55 inclined by 45 ° with respect to the first frame portion 51 and the fourth frame portion 54 is formed between the first frame portion 51 and the fourth frame portion 54. .. Further, between the second frame portion 52 and the third frame portion 53, a second inclined frame portion 56 inclined by 45 ° with respect to the second frame portion 52 and the third frame portion 53 is formed. Further, between the first frame portion 51 and the third frame portion 53, a third inclined frame portion 57 inclined by 45 ° with respect to the first frame portion 51 and the third frame portion 53 is formed. The first inclined frame portion 55 and the second inclined frame portion 56 are formed with notches 14 for holding the gimbal frame receiving member 17 (fixed body side gimbal frame receiving member) of the fixed body connecting mechanism 12. The notch portion 14 is arranged at a diagonal position in the second axial direction in the case 50. Each notch portion 14 is notched in the −Z direction from the + Z direction edge of the case 50.

Coil arrangement holes 58 are provided in the first frame portion 51 and the third frame portion 53. Each coil arrangement hole 58 is a through hole, and the coil 26X of the first magnetic drive mechanism 7X and the coil 26Y of the second magnetic drive mechanism 7Y are arranged, respectively. The coils 26X and 26Y are oval air core coils long in the circumferential direction, and two long sides located on the + Z direction side and the −Z direction side are used as effective sides. A flexible printed circuit board 60 is fixed to the outside of the first frame portion 51 and the third frame portion 53 in the radial direction. The flexible printed circuit board 60 overlaps the coil arrangement hole 58 of the third frame portion 53 from the outside in the radial direction with respect to the first substrate portion 61 and the coil arrangement hole 58 of the first frame portion 51 from the outside in the radial direction. A second substrate portion 62 is provided. The coil 26X is fixed to the first substrate portion 61, and the coil 26Y is fixed to the second substrate portion 62. The coil 26X and the coil 26Y are electrically connected to the flexible printed circuit board 60.

A rectangular magnetic plate 64 is arranged on the first substrate portion 61 and the second substrate portion 62, respectively. The magnetic plate 64 arranged on the first substrate portion 61 faces the magnet 25X, and constitutes a magnetic spring for returning the movable body 4 to a reference rotation position in the rotation direction around the X axis. Further, the magnetic plate 64 arranged on the second substrate portion 62 faces the magnet 25Y, and constitutes a magnetic spring for returning the movable body 4 to the reference rotation position in the rotation direction around the Y axis. Further, the magnetic sensor 65 is arranged at a position overlapping the center holes of the coils 26X and 26Y. The magnetic sensor 65 is, for example, a Hall element. The optical unit 1 with a runout correction function detects the swing angle of the movable body 4 around the X axis from the output of the magnetic sensor 65 arranged at the center of the coil 26X. Further, the swing angle of the movable body 4 around the Y axis is detected from the output of the magnetic sensor 65 arranged at the center of the coil 26Y.

(Gimbal frame)
As shown in FIGS. 2 and 3, the gimbal frame 10 has a substantially square gimbal frame main body 70 when viewed from the Z-axis direction, and the gimbal frame main body 70 radially outward from the diagonal position in the first axial direction. The first gimbal frame extension 71 that bends in the -Z direction and extends in the Z-axis direction, and the gimbal frame main body 70 that bends in the -Z direction from the diagonal position in the second axis direction to the outside in the radial direction. A second gimbal frame extension portion 72 extending in the Z-axis direction is provided. A central hole 73 penetrating the gimbal frame main body 70 is provided in the center of the gimbal frame main body 70. As shown in FIG. 2, the gimbal frame main body 70 overlaps with the main body 32 of the camera module 3 when viewed from the Z-axis direction.

FIG. 5A is a side view of the gimbal frame 10 and is a view seen from the first axis direction. FIG. 5B is a side view of the gimbal frame 10 and the gimbal frame receiving member 17, and is a view seen from the second axial direction. As shown in FIGS. 3 and 5, the gimbal frame main body 70 has a rectangular central plate portion 75 extending in the first axial direction at the center in the second axial direction, and both sides of the central plate portion 75 in the second axial direction. It includes a pair of trapezoidal square plate portions 76 that incline in the + Z direction toward. In the gimbal frame main body 70, the square plate portion 76 in the second axial direction is the central plate portion 7.
It is farther from the movable body 4 than the 5. Therefore, even when the movable body 4 rotates around the first axis R1 on the −Z direction side of the gimbal frame 10 and both ends of the movable body 4 in the second axis direction move in the Z axis direction, the movable body 4 and the gimbal It is possible to avoid collision with the frame 10.

As shown in FIGS. 3 and 5, the first gimbal frame extension portion 71 is a first gimbal frame extension portion that is inclined in the −Z direction from the central plate portion 75 of the gimbal frame main body portion 70 toward the first axial direction. A first gimbal frame extension portion 81 and a first gimbal frame extension portion second extension portion 82 extending in the −Z direction of the first gimbal frame extension portion 81 in the Z-axis direction are provided. The first gimbal frame extension portion 71 includes a support portion 20 (movable body side support portion) constituting the movable body connecting mechanism 11 at the tip of the first gimbal frame extension portion second extension portion 82 in the −Z direction. .. The support portion 20 includes a concave curved surface 19 that is recessed inward in the radial direction at the central portion in the circumferential direction of the end face on the outer side in the radial direction.

The support portion 20 (movable body side support portion) provided at the tip of the first gimbal frame extension portion 71 includes a convex portion 21 projecting inward in the radial direction at a central portion in the circumferential direction. The convex portion 21 is formed by press working on the second extending portion 82 of the first gimbal frame extending portion. The concave curved surface 19 is formed on the convex portion 21. Further, the convex portion 21 is formed with a convex curved surface 18 on the opposite side of the concave curved surface 19. Further, the support portion 20 (movable body side support portion) includes edge portions 22 extending from the convex portion 21 to both sides in the circumferential direction. The edge portions 22 are formed concentrically with the convex portion 21 as the center on both sides of the convex portion 21 in the circumferential direction. Here, the concave curved surface 19 has a radius of curvature larger than the radius of curvature of the sphere 15 constituting the movable body connecting mechanism 11. Further, the first gimbal frame extension portion second extension portion 82 includes a passage portion 84 having a width in the circumferential direction narrower than that of the support portion 20 in the + Z direction of the support portion 20.

As shown in FIGS. 3 and 5, the second gimbal frame extension portion 72 is inclined in the −Z direction from each of the pair of square plate portions 76 of the gimbal frame main body portion 70 in the second axial direction. The first extension portion 85 of the gimbal frame extension portion and the second extension portion of the second gimbal frame extension portion extending in the Z-axis direction from the -Z direction end of the second gimbal frame extension portion first extension portion 85. It is equipped with 86. The second gimbal frame extension portion 72 includes a support portion 20 (fixed body side support portion) constituting the fixed body connecting mechanism 12 at the tip of the second gimbal frame extension portion 72 in the first direction of the second gimbal frame extension portion 72. .. The support portion 20 includes a concave curved surface 19 that is recessed inward in the radial direction at the central portion in the circumferential direction of the end face on the outer side in the radial direction.

The support portion 20 (fixed body side support portion) provided at the tip of the second gimbal frame extension portion 72 is the same as the support portion 20 (movable body side support portion) provided at the tip of the first gimbal frame extension portion 71. The shape. That is, at the tip of the second gimbal frame extension portion 72, the support portion 20 (fixed body side support portion) includes a convex portion 21 projecting inward in the radial direction at the central portion in the circumferential direction. The convex portion 21 is formed by press working on the second extending portion 86 of the second gimbal frame extending portion. The concave curved surface 19 is formed on the convex portion 21. Further, the convex portion 21 is formed with a convex curved surface 18 on the opposite side of the concave curved surface 19. Further, the support portion 20 (movable body side support portion) includes edge portions 22 extending from the convex portion 21 to both sides in the circumferential direction. The edge portions 22 are formed concentrically with the convex portion 21 as the center on both sides of the convex portion 21 in the circumferential direction. The concave curved surface 19 has a radius of curvature larger than the radius of curvature of the sphere 15 constituting the fixed body connecting mechanism 12. Further, the second extended portion 86 of the second gimbal frame extending portion includes a passing portion 84 whose width in the circumferential direction is narrower than that of the support portion 20 in the + Z direction of the support portion 20.

Here, the support portion 20 (movable body side support portion) of each first gimbal frame extension portion 71 has a gimbal frame receiving member 17 (movable body side gimbal frame receiving member) held by each holding portion 13 of the movable body 4. Spheres 15 come into contact with each other. As a result, as shown in FIG. 2, a movable body connecting mechanism 11 for rotatably connecting the gimbal frame 10 and the movable body 4 around the first axis R1 is configured. More specifically, the holding portion 13 of the movable body 4 holds the gimbal frame receiving member 17 (movable body side gimbal frame receiving member) at a position where the first axis R1 passes through the center of the sphere 15. The sphere 15 is partially inserted into the concave curved surface 19 of the support portion 20 of the first gimbal frame extension portion 71 from the first axial direction. As a result, the concave curved surface 19 and the sphere 15 are in a state of point contact on the first axis R1 line, so that the movable body 4 and the gimbal frame 10 are connected in a rotatable state around the first axis R1 line. ..

Further, the support portion 20 (fixed body side support portion) of the second gimbal frame extension portion 72 comes into contact with the sphere 15 of the gimbal frame receiving member 17 held by the notch portion 14 of the fixed body 6. As a result, as shown in FIG. 2, the gimbal frame 10 and the fixed body 6 are rotatably connected around the second axis R2. The fixed body connection mechanism 12 is configured. More specifically, the notch 14 of the fixed body 6 holds the gimbal frame receiving member 17 (fixed body side gimbal frame receiving member) at a position where the second axis R2 passes through the center of the sphere 15. The sphere 15 is partially inserted into the concave curved surface 19 of the support portion 20 of the second gimbal frame extension portion 72 from the second axial direction. As a result, the concave curved surface 19 and the sphere 15 come into contact with each other at a point on the second axis R2 line, so that the fixed body 6 and the gimbal frame 10 are connected in a rotatable state around the second axis R2 line. To.

(Composition of common parts of movable body connection mechanism and fixed body connection mechanism)
Next, the movable body connecting mechanism 11 and the fixed body connecting mechanism 12 will be described in more detail. In this embodiment, the movable body connecting mechanism 11 and. The fixed body connecting mechanism 12 has a common configuration. That is, the holding portion 13 of the movable body 4 is configured on the first axis R1, and the notch portion 14 of the fixed body 6 is configured on the second axis R2, but is held by the holding portion 13 and the notch portion 14. The gimbal frame receiving member 17 is the same member. Further, the gimbal frame 10 is provided with support portions 20 having the same shape at diagonal positions on the first axis R1 and diagonal positions on the second axis R2, and each support portion 20 is provided with a gimbal frame receiver. A concave curved surface 19 is formed that makes point contact with the sphere 15 of the member 17.

(Gimbal frame receiving member)
As shown in FIG. 4, the gimbal frame receiving member 17 includes a metal sphere 15 and a metal thrust receiving member 16 to which the sphere 15 is fixed. The thrust receiving member 16 includes a plate portion 91 having a sphere fixing portion 90 to which the sphere 15 is fixed, and a foot portion 92 that bends at a right angle in the first axial direction from the end of the plate portion 91 in the −Z direction (first direction). To be equipped.

The plate portion 91 has a rectangular shape that is long in the Z-axis direction (optical axis direction) as a whole. The sphere fixing portion 90 is a circular through hole provided in the plate portion 91. The inner diameter of the through hole is smaller than the diameter of the sphere 15. The sphere 15 is fixed to the thrust receiving member 16 by welding in a state of being partially inserted into the sphere fixing portion 90.

Further, the thrust receiving member 16 projects from both ends in the circumferential direction in the + Z direction (second direction) to the side where the support portion 20 is located in the first axial direction or the second axial direction with respect to the spherical fixing portion 90 of the plate portion 91. A pair of arm portions 94 are provided. In the movable body connecting mechanism 11, the arm portion 94 protrudes in the first axial direction, and in the fixed body connecting mechanism 12, the arm portion 94 protrudes in the second axial direction. The pair of arm portions 94 face each other in the circumferential direction. As shown in FIG. 4, each of the pair of arm portions 94 has a protruding plate portion 95 that bends in the first axial direction or the second axial direction from the circumferential end of the plate portion 91, and a plate portion of the protruding plate portion 95. An extension plate portion 96 that bends in the circumferential direction from the end opposite to the plate portion 91 to the side opposite to the plate portion 91 is provided.

The foot portion 92 is opposite to the foot portion protruding plate portion 97 that bends at a right angle in the first axial direction from the end of the plate portion 91 in the −Z direction (first direction) and the plate portion 91 in the foot portion protruding plate portion 97. A foot extension plate portion 98 that bends at a right angle in the −Z direction (first direction) from the side end is provided. The distance between the foot extension plate portion 98 and the plate portion 91 is the same as the distance between the extension plate portion 96 provided on the pair of arm portions 94 and the plate portion 91. Further, the width of the tip portion of the foot protruding plate portion 97 connected to the foot extending plate portion 98 in the circumferential direction is narrower than the width of the plate portion 91 in the circumferential direction.

As shown in FIG. 5B, in the movable body connecting mechanism 11, the plate portion 91 of the thrust receiving member 16 is connected to the support portion 20 of the first gimbal frame extension portion 71 via the sphere 15 in the first axial direction. opposite. Similarly, in the fixed body connecting mechanism 12, the plate portion 91 of the thrust receiving member 16 faces the support portion 20 of the second gimbal frame extending portion 72 in the second axial direction via the sphere 15. The foot portion 92 is located in the −Z direction of the support portion 20 and faces the support portion 20 in the Z-axis direction.

(Movable body connection mechanism)
FIG. 6 is a perspective view of the movable body connecting mechanism 11. FIG. 7 is a view of the movable body connecting mechanism 11 as viewed from the camera module 3 side (viewed from the direction A in FIG. 6). FIG. 8 is a plan view of the movable body connecting mechanism 11. FIG. 9 is a cross-sectional view of the movable body connecting mechanism 11 cut along the first axis R1. As shown in FIGS. 6 and 8, the holder 31 is provided with an overhanging portion 39 overhanging to the outer peripheral side at a diagonal position in the first axial direction, and a holding portion 13 is formed inside the overhanging portion 39. .. The holding portion 13 is a concave portion recessed on the side opposite to the camera module 3 in the first axis direction, that is, on the outer peripheral side in the first axis direction.

As shown in FIG. 8, the overhanging portion 39 includes a back wall portion 101 extending in the Z-axis direction and the circumferential direction, and a pair of side walls extending in the Z-axis direction on both sides of the back wall portion 101 in the circumferential direction and facing each other in the circumferential direction. A unit 102 is provided. The holding portion 13 is a recess surrounded by a back wall portion 101 and a pair of side wall portions 102. The holding portion 13 opens in the + Z direction and the −Z direction (one and the other in the optical axis direction), and also opens on the inner peripheral side in the first axis R1 direction, that is, on the side of the camera module 3.

When assembling the optical unit 1 with the runout correction function, the gimbal frame receiving member 17 (movable body side gimbal frame receiving member) of the movable body connecting mechanism 11 extends the first gimbal frame as shown in FIG. 5 (b). The concave curved surface 19 of the support portion 20 of the portion 71 is brought into contact with the sphere 15, and is inserted into the holding portion 13 from the + Z direction side together with the first gimbal frame extension portion and the second extension portion 82. .. The first gimbal frame extension 71 is provided at two positions diagonally in the first axial direction of the gimbal frame 10. When the two first gimbal frame extension portions 71 are inserted into the two holding portions 13 provided at diagonal positions in the first axial direction of the holder 31, the first gimbal frame extension portion 71 is on the inner peripheral side. The first gimbal frame extending portion 71 is urged toward the outer peripheral side by being configured to bend to. As a result, the gimbal frame receiving member 17 is subjected to the urging force from the first gimbal frame extending portion 71 via the sphere 15. Therefore, as shown in FIGS. 8 and 9, the back wall portion 101 contacts the plate portion 91 of the thrust receiving member 16 from the side opposite to the support portion 20 of the gimbal frame 10.

As shown in FIG. 8, the pair of side wall portions 102 are located on both sides of the thrust receiving member 16 in the circumferential direction. The tips of the extension plate portions 96 of the pair of arm portions 94 face each other with the pair of side wall portions 102. Therefore, the thrust receiving member 16 is positioned in the circumferential direction by the pair of side wall portions 102. Further, when the gimbal frame receiving member 17 (movable body side gimbal frame receiving member) is inserted into the holding portion 13, the pair of arm portions 94 are guided by the pair of side wall portions 102.

In this embodiment, the holder 31 is made of metal, and the thrust receiving member 16 is fixed to the holder 31 by welding. As shown in FIGS. 6 and 9, in the thrust receiving member 16, the end portion of the plate portion 91 in the + Z direction protrudes in the + Z direction from the back wall portion 101 provided in the overhanging portion 39 of the holder 31, and the back wall. The plate portion 91 is welded to the end portion of the portion 101 in the + Z direction. Therefore, a welding mark is formed at the welding position P1 shown in FIG. As described above, since the urging force urging the gimbal frame receiving member 17 from the first gimbal frame extending portion 71 to the outer peripheral side acts, the gimbal frame receiving member 71 receives the gimbal frame at the time of assembly. The member 17 is pressed against the back wall portion 101 and is positioned in the circumferential direction by the pair of side wall portions 102, so that the gimbal frame receiving member 17 is temporarily fixed to the holding portion 13. Therefore, when welding the thrust receiving member 16 to the holder 31, a jig for temporary fixing is not required.

In a state where the concave curved surface 19 provided on the support portion 20 of the first gimbal frame extension portion 71 and the sphere 15 are in contact with each other, the first gimbal frame extension portion second extension portion 82 has a pair of arm portions 94. It extends in the Z-axis direction via the space. More specifically, as shown in FIG. 7, the support portion 20 (movable body side support portion) provided at the tip of the first gimbal frame extension portion second extension portion 82 in the −Z direction has a pair of arms. The passage portion 84 is located between the pair of arm portions 94, which is located in the −Z direction of the portion 94. Further, the foot portion 92 is arranged in the −Z direction of the support portion 20.

Here, as shown in FIGS. 7 and 8, the circumferential width H1 of the support portion 20 is longer than the circumferential width H2 of the passing portion 84, and the circumferential distance H3 of the pair of arm portions 94. Longer than. Therefore, when viewed from the Z-axis direction (optical axis direction), the pair of arm portions 94 overlap with both end portions of the support portion 20 in the circumferential direction. That is, as shown in FIG. 7, the support portion 20 has a convex portion 21 provided with a concave curved surface 19 arranged between a pair of arm portions 94, and an edge portion extending on both sides of the convex portion 21 in the circumferential direction. The 22 overlaps with the pair of arm portions 94 when viewed from the Z-axis direction (optical axis direction). Therefore, the pair of arm portions 94 restricts the support portion 20 from coming off in the + Z direction.

As shown in FIGS. 8 and 9, in the movable body 4, the holding portion 13 opens to the inner peripheral side in the first axial direction, and the opening of the holding portion 13 and the facing wall portion facing the opening in the first axial direction are formed. Be prepared. In this embodiment, the facing wall portion is the outer peripheral surface of the camera module 3. As shown in FIG. 3, the main body 32 of the camera module 3 is octagonal when viewed from the Z-axis direction. Therefore, the outer peripheral surface of the camera module 3 is provided with a side surface 41 perpendicular to the first axis R1 at one corner portion and the other corner portion in the first axis direction, respectively. When the camera module 3 is fitted inside the holder 31, the side surface 41 constitutes an opening of the holding portion 13 in the first axial direction and a facing wall portion facing the opening in the first axial direction.

As shown in FIG. 9, the side surface 41 (the outer peripheral surface of the camera module 3) faces the pair of arms 94 of the thrust receiving member 16 in the first axial direction, and the legs of the thrust receiving member 16 face the first axial direction. Facing the unit 92. In the first axial direction, the separation distance M between the tip of the pair of arm portions 94 and the side surface 41 (opposing wall portion), that is, the separation distance between the side surface 41 and the extension plate portion 96 of each arm portion 94. M is narrower than the thickness dimension N of the support portion 20 in the first axial direction. Here, as shown in FIGS. 8 and 9, the thickness dimension N of the support portion 20 is the thickness of the entire support portion 20 including the protrusion dimension of the convex portion 21 in the support portion 20 and the thickness dimension of the edge portion 22. It is a dimension. In this embodiment, the separation distance M is narrower than the thickness dimension N1 in the first axial direction of the edge portion 22 that does not include the protruding dimension of the convex portion 21.

(Fixed body connection mechanism)
FIG. 10 is a view of the fixed body connecting mechanism 12 as viewed from the outer peripheral side. FIG. 11 is a cross-sectional view of the fixed body connecting mechanism 12 cut along the second axis R2. FIG. 12 is an exploded perspective view of the fixed body connecting mechanism 12. FIG. 13 is a perspective view of the fixed body connecting mechanism 12. As shown in FIGS. 3, 12, and 13, in the case 50 of the fixed body 6, the first inclined frame portion 55 and the second inclined frame portion 56 arranged at diagonal positions in the second axial direction are respectively. A notch portion 14 is provided.

As shown in FIG. 12, the notch portion 14 has stepped edges on both sides in the circumferential direction. The notch portion 14 includes an intermediate portion 141 into which a pair of arm portions 94 of the thrust receiving member 16 are fitted, and a first tapered portion 142 is formed in the −Z direction (first direction) of the intermediate portion 141. , The second tapered portion 143 is formed in the + Z direction (second direction) of the intermediate portion 141. The first tapered portion 142 and the second tapered portion 143 have a shape in which the width in the circumferential direction becomes narrower toward the −Z direction (first direction) opposite to the opening side. In the −Z direction (first direction) of the first tapered portion 142, a groove portion 144 having a width narrower in the circumferential direction than the intermediate portion 141 is formed. Further, in the + Z direction (second direction) of the second tapered portion 143, an opening 145 having a width wider in the circumferential direction than the intermediate portion 141 is formed. The width of the intermediate portion 141, the groove portion 144, and the opening portion 145 in the circumferential direction is constant.

Here, when assembling the optical unit 1 with the runout correction function, the gimbal frame receiving member 17 (fixed body side gimbal frame receiving member) of the fixed body connecting mechanism 12 is a second gimbal as shown in FIG. 5 (b). The concave curved surface 19 of the support portion 20 of the frame extension portion 72 is brought into contact with the sphere 15, and is inserted into the notch portion 14 from the + Z direction side. At this time, the plate portion 91 of the thrust receiving member 16 is arranged on the outer peripheral side of the notch portion 14, and the pair of arm portions 94 and the foot portion 92 are inserted into the notch portion 14. The pair of arm portions 94 are fitted in the intermediate portion 141 of the notch portion, and the foot portion 92 is fitted in the groove portion 144 of the notch portion 14. The foot protruding plate portion 97 includes a foot passing portion 99 whose width in the circumferential direction is narrower than that of the plate 91, and the foot passing portion 99 is fitted in the groove portion 144.

Similar to the case of the movable body connecting mechanism 11, the fixed body connecting mechanism 12 has the second gimbal frame extending portion 72 and the second gimbal frame extending portion 72 into the two notches 14 provided at diagonal positions in the first axial direction of the case 50. When the gimbal frame receiving member 17 is inserted, the second gimbal frame extending portion 72 is configured to bend inward, and the second gimbal frame is inserted into the gimbal frame receiving member 17 (fixed side gimbal frame receiving member). An urging force that urges the extending portion 72 toward the outer periphery acts. Therefore, as shown in FIGS. 11 and 13, the tips of the pair of arm portions 94 and foot portion 92 of the thrust receiving member 16 are locked to the edge of the notch portion 14. As shown in FIG. 13, the extension plate portion 96 of each arm portion 94 abuts on the edge of the intermediate portion 141 of the notch portion 14 from the side opposite to the plate portion 91, and the foot extension plate portion of the foot portion 92. 98 abuts on the lower end edge of the groove 144 from the side opposite to the plate 91.

In this embodiment, the case 50 is made of metal, and the thrust receiving member 16 is fixed to the case 50 by welding. As shown in FIG. 10, in the thrust receiving member 16, since the protruding plate portion 95 of the pair of arm portions 94 extends from the edge of the intermediate portion 141 of the notch portion 14 toward the plate portion 91, the intermediate portion 141 The protruding plate portion 95 is welded to the edge. Further, since the foot protruding plate portion 97 of the foot portion 92 extends from the edge of the groove portion 144 toward the plate portion 91, the foot portion protruding plate portion 97 is welded to the edge of the groove portion 144. Therefore, welding marks are formed at the three welding positions P2 shown in FIG. As described above, the thrust receiving member 16 is cut by the urging force acting from the second gimbal frame extending portion 72 so that the tips of the pair of arm portions 94 and the foot portion 92 are locked to the edges of the notch portion 14. It is temporarily fixed to the notch 14. Therefore, when welding the thrust receiving member 16 to the case 50, a jig for temporary fixing is not required.

In a state where the concave curved surface 19 of the support portion 20 of the second gimbal frame extension portion 72 and the sphere 15 are in contact with each other, the second extension portion 86 of the second gimbal frame extension portion is between the pair of arm portions 94. It extends in the Z-axis direction via. More specifically, as shown in FIGS. 10 and 13, the support portion 20 (fixed body side support portion) provided at the tip of the second extension portion 86 of the second gimbal frame extension portion 86 in the −Z direction is The pair of arm portions 94 are located in the −Z direction, and the passing portion 84 is located between the pair of arm portions 94. Further, the foot portion 92 is arranged in the −Z direction of the support portion 20. Therefore, the support portion 20 (fixed body side support portion) is arranged between the plate portion 91 and the notch portion 14 in the second axial direction, and the arm portion 94 and the foot portion in the Z-axis direction (optical axis direction). It is placed between the 92 and 92.

Here, as shown in FIG. 10, the circumferential width H1 of the support portion 20 is longer than the circumferential width H2 of the passing portion 84 and longer than the circumferential distance H3 of the pair of arm portions 94. .. Therefore, when viewed from the Z-axis direction (optical axis direction), the pair of arm portions 94 overlap with both end portions of the support portion 20 in the circumferential direction. That is, as shown in FIG. 13, in the support portion 20, the convex portion 21 provided with the concave curved surface 19 is arranged between the pair of arm portions 94, and the edge portion of the convex portion 21 extends to both sides in the circumferential direction. The 22 overlaps with the pair of arm portions 94 when viewed from the Z-axis direction (optical axis direction). Therefore, the support portion 20 is restricted from coming out in the + Z direction by the pair of arm portions 94.

The edge of the notch portion 14 in the case 50 functions as an opposing wall portion 146 facing the support portion 20 in the second axial direction. As shown in FIG. 13, the facing wall portion 146 is an edge of the first tapered portion 142 and an edge of the groove portion 144 provided in the −Z direction of the intermediate portion 141. The width of the first tapered portion 142 and the groove portion 144 in the circumferential direction is narrower than that of the intermediate portion 141 in which the pair of arm portions 94 are locked, and the width H1 in the circumferential direction of the support portion 20 is wider than the width of the intermediate portion 141. large. Therefore, as shown in FIG. 13, when viewed from the second axial direction, the support portion 20 (fixed body side support portion) overlaps with the facing wall portion 146 provided on the edge of the first tapered portion 142 and the groove portion 144. There is.

(Main action and effect of this form)
As described above, the optical unit 1 with the shake correction function of the present embodiment can swing around the movable body 4 including the camera module 3 and the first axis R1 at which the movable body 4 intersects the optical axis L of the camera module 3. A gimbal mechanism 5 that supports the movable body 4 so as to swing around a second axis that intersects the optical axis L and the first axis R1, and a fixed body that supports the movable body 4 via the gimbal mechanism 5. 6 and. The gimbal mechanism 5 includes a gimbal frame 10, a movable body connecting mechanism 11 that rotatably connects the gimbal frame 10 and the movable body 4 around the first axis R1, and the movable body connecting mechanism 11 includes a sphere 15 and the sphere 15. A support portion 20 (movable body side support portion) having a gimbal frame receiving member 17 (movable body side gimbal frame receiving member) having a metal thrust receiving member 16 fixed to the gimbal frame 10 and a concave curved surface 19 in contact with the sphere 15 in the gimbal frame 10. ), And the movable body 4 includes a holder 31 that surrounds the outer peripheral side of the camera module 3. The holder 31 includes a holding portion 13 that holds the gimbal frame receiving member 17 (movable body side gimbal frame receiving member) at a position where the first axis R1 passes through the center of the sphere 15. When the direction along the optical axis L is the optical axis direction and the direction along the first axis R1 is the first axis direction, the gimbal frame receiving member 17 (movable body side gimbal frame receiving member) is the camera module 3. An arm portion 94 extending toward the side surface 41 (outer peripheral surface) is provided, and the arm portion 94 overlaps with the support portion 20 (movable body side support portion) when viewed from the optical axis direction. Further, the distance M between the tip of the arm portion 94 and the side surface 41 (outer peripheral surface) in the first axial direction is narrower than the thickness dimension of the support portion 20 (support portion on the movable body side) in the first axial direction.

According to this embodiment, the movable body connecting mechanism 11 for rotatably connecting the movable body 4 and the gimbal frame 10 around the first axis R1 is provided on the gimbal frame receiving member 17 (movable body side gimbal frame receiving member). It includes a sphere 15 and a concave curved surface 19 provided on a support portion 20 (support portion on the movable body side) of the gimbal frame 10. Therefore, the movable body 4 and the gimbal frame 10 can be connected by bringing the sphere 15 into point contact with the concave curved surface 19. Here, the gimbal frame receiving member 17 (movable body side gimbal frame receiving member) is held by the holder 31 that holds the camera module 3, and the arm portion 94 extending toward the side surface 41 (outer peripheral surface) of the camera module 3 is held. I have. The arm portion 94 overlaps with the support portion 20 (movable body side support portion) of the gimbal frame 10 when viewed from the optical axis direction. Further, the distance M in the first axial direction between the tip of the arm portion 94 and the side surface 41 (outer peripheral surface) of the camera module 3 is narrower than the thickness dimension of the support portion 20 (support portion on the movable body side) in the first axial direction. .. Therefore, even when the gimbal frame 10 bends when an impact is received from the outside and the concave curved surface 19 provided on the movable body 4 support portion is separated from the sphere 15 in the first axial direction, the support portion 20 (movable body side support) The portion) cannot pass through the gap between the arm portion 94 and the camera module 3. Therefore, it is possible to prevent or suppress the gimbal frame 10 from coming off the movable body 4.

Further, according to this embodiment, the side surface 41 (outer peripheral surface) of the camera module 3 is used as an opposing wall portion for preventing the gimbal frame 10 from coming off. Therefore, since it is not necessary to form a wall for preventing the holder 31 from coming off facing the gimbal frame receiving member 17 (movable body side gimbal frame receiving member), the holder 31 can be made into a simple shape, and the holder 31 can be made thin. Can be achieved. Therefore, it is advantageous for miniaturization of the optical unit 1 with a runout correction function.

In the present embodiment, the holder 31 has a tubular shape and is provided with an overhanging portion 39 overhanging to the outer peripheral side at a diagonal position in the first axial direction, so that the holding portion 13 can be easily formed inside the overhanging portion 39. Moreover, the structure of the holder 31 can be simplified.

In the present embodiment, the overhanging portion 39 is a back wall portion 101 that contacts the thrust receiving member 16 from the side opposite to the support portion 20 (movable body side support portion) in the first axial direction, and both sides of the back wall portion 101 in the circumferential direction. A pair of side wall portions 102 extending in the optical axis direction and facing each other in the circumferential direction are provided. Since the pair of side wall portions 102 position the support portion 20 (movable body side support portion) in the circumferential direction, the positional accuracy of the thrust receiving member 16 in the circumferential direction can be improved. Further, when the gimbal frame receiving member 17 (movable body side gimbal frame receiving member) is inserted into the holding portion 13, the pair of side wall portions 102 can be used as guide portions. Therefore, the movable body connecting mechanism 11 can be easily assembled.

If the holder 31 includes a positioning portion for positioning the thrust receiving member 16 in the optical axis direction, the positioning accuracy of the sphere 15 fixed to the thrust receiving member 16 in the optical axis direction can be improved. For example, a cut-up portion formed by cutting out the edge of the holder 31 in the −Z direction and bending it toward the inner peripheral side can be used as the positioning portion.

In this embodiment, the holder 31 is made of metal, the camera module 3 is fitted on the inner peripheral side of the holder 31, and the thrust receiving member 16 is welded to the holder 31. As described above, in this embodiment, the shape of the holder 31 can be simplified, so that the holder 31 can be made of metal. Therefore, the holder 31 can be made thinner, and the optical unit 1 with a runout correction function can be made smaller. Further, by fixing the thrust receiving member 16 by welding, the fixing strength can be increased and the assembly time can be shortened. Further, since the thrust receiving member 16 projects from the end portion of the overhanging portion 39 in the optical axis direction, the thrust receiving member 16 can be easily fixed by welding.

In this embodiment, when one of the optical axis directions is the −Z direction (first direction), the other of the optical axis directions is the + Z direction (second direction), and the circumference of the optical axis L is the circumferential direction, the thrust receiving member Reference numeral 16 denotes a plate portion 91 having a sphere fixing portion 90 to which the sphere 15 is fixed and facing the support portion 20 (movable body side support portion) via the sphere 15 in the first axial direction, and a sphere fixing portion of the plate portion 91. A pair of arm portions 94 projecting from both ends in the circumferential direction in the + Z direction (second direction) with respect to 90 toward the side where the support portion is located is provided. Each of the pair of arm portions 94 has a protruding plate portion 95 that bends in the first axial direction from the circumferential end of the plate portion 91 and a plate in the circumferential direction from the end of the protruding plate portion 95 opposite to the plate portion 91. An extension plate portion 96 that bends to the side opposite to the portion 91 is provided. In each of the pair of arm portions 94, the extension plate portion 96 faces the side surface 41 (outer peripheral surface) of the camera module 3, and the distance between the extension plate portion 96 and the side surface 41 (outer peripheral surface) in the first axial direction. M is narrower than the thickness dimension N of the support portion 20 (support portion on the movable body side) in the first axial direction. As a result, the area where each arm portion 94 and the side surface 41 of the camera module 3 (the outer peripheral surface of the camera module 3) face each other in the first axis direction can be increased. Therefore, it is easy to prevent the support portion 20 (support portion on the movable body side) from passing through the gap between the arm portion 94 and the camera module 3.

More specifically, the support portion 20 (movable body side support portion) includes a convex portion 21 on which a concave curved surface 19 is formed, and edge portions 22 extending from the convex portion 21 to both sides in the circumferential direction. In each of the pair of arm portions 94, the protruding plate portion 95 overlaps with the edge portion 22 when viewed from the optical axis direction, and the distance M between the extending plate portion 96 and the side surface 41 (outer peripheral surface) in the first axial direction. Is narrower than the thickness dimension N of the support portion 20 (support portion on the movable body side) in the first axial direction. Here, the thickness dimension N of the support portion 20 (support portion on the movable body side) in the first axial direction includes the protrusion dimension N2 of the convex portion 21 in the first axial direction and the thickness dimension N1 of the edge portion 22 in the first axial direction. It is the thickness dimension of the entire support portion. Therefore, even when the gimbal frame 10 bends when an impact is received from the outside and the tip of the convex curved surface 18 of the convex portion 21 moves to a position where it hits the side surface 41 (outer peripheral surface) of the camera module 3, the thrust receiving member 16 The protruding plate portion 95 can prevent the support portion 20 (support portion on the movable body side) from coming off in the + Z direction (second direction).

The support portion 20 of the present embodiment has edge portions 22 formed concentrically around the convex portion 21 on both sides of the convex portion 21 in the circumferential direction. Therefore, even if the gimbal frame 10 is assembled so as to be tilted around the first axis R1, the protruding dimension of the edge portion 22 in the circumferential direction does not change. Therefore, it is possible to prevent the support portion 20 (movable body side support portion) from coming off from the thrust receiving member 16 due to the tilting of the gimbal frame 10.

The gimbal frame 10 of the present embodiment includes a first gimbal frame extending portion 71 extending in the optical axis direction via between the pair of projecting plate portions 95. The first gimbal frame extension portion 71 is provided with a support portion 20 (movable body side support portion) at the tip in the −Z direction (first direction), and is provided with a support portion 20 (movable body side support portion) in the + Z direction (second direction). ) Is provided with a passing portion 84 located between the pair of protruding plate portions 95. The circumferential width dimension H1 of the support portion 20 (movable body side support portion) is longer than the circumferential width dimension H2 of the passing portion 84 and longer than the distance H3 of the pair of protruding plate portions 95. Therefore, it is possible to prevent the support portion 20 (movable body side support portion) from coming off by the pair of projecting plate portions 95. Further, since the first gimbal frame extension portion 71 extends in the optical axis direction, the first gimbal frame extension portion 71 is bent to generate an urging force to urge the outer peripheral side, and the thrust is received by the urging force. The member 16 can be temporarily fixed to the holding portion 13. Therefore, it is easy to assemble.

The gimbal mechanism 5 of the present embodiment includes a fixed body connecting mechanism 12 that rotatably connects the gimbal frame 10 and the fixed body 6 in the second axial direction, and the fixed body connecting mechanism 12 fixes the sphere 15 and the sphere 15. A gimbal frame receiving member 17 (fixed body side gimbal frame receiving member) including the metal thrust receiving member 16 and a supporting portion 20 (fixed body side supporting portion) having a concave curved surface 19 in contact with the sphere 15 in the gimbal frame 10. , Equipped with. The fixed body 6 includes a case 50 that surrounds the outer peripheral side of the movable body 4, and the case 50 includes a notch portion 14 that cuts out a position through which the second axial direction passes in the optical axis direction. The gimbal frame receiving member 17 (fixed body side gimbal frame receiving member) is arranged in the notch portion 14 and is held at a position where the center of the sphere 15 passes in the second axial direction. Therefore, also in the fixed body connecting mechanism 12, the same gimbal frame receiving member 17 as the gimbal frame receiving member 17 used in the movable body connecting mechanism 11 can be used, so that the fixed body connecting mechanism 12 and the movable body connecting mechanism 12 can be used. It is possible to standardize the parts in 11.

In this embodiment, the case 50 is made of metal, and the thrust receiving member 16 provided on the gimbal frame receiving member 17 (fixed body side gimbal frame receiving member) is welded to the case 50. Therefore, the case 50 can be made thinner, and the optical unit 1 with a runout correction function can be further made smaller. Further, also in the fixed body connecting mechanism 12, the thrust receiving member 16 can be fixed by welding. Therefore, the fixing strength can be increased and the assembly time can be shortened.

1 ... Optical unit with runout correction function, 2 ... Lens, 3 ... Camera module, 4 ... Movable body, 5 ... Gimbal mechanism, 6 ... Fixed body, 7 ... Shake correction drive mechanism, 7X ... First magnetic drive mechanism, 7Y ... 2nd magnetic drive mechanism, 8 ... 1st cover, 9 ... 2nd cover, 10 ... gimbal frame, 1
1 ... Movable body connection mechanism, 12 ... Fixed body connection mechanism, 13 ... Holding part, 14 ... Notch part, 15 ... Sphere, 16 ... Thrust receiving member, 17 ... Gimbal frame receiving member, 18 ... Convex curved surface, 19 ... Concave Curved surface, 20 ... Support part, 21 ... Convex part, 22 ... Edge part, 25X, 25Y ... Magnet, 26X, 26Y ... Coil, 30 ... Protruding part, 31 ... Holder, 32 ... Main body part, 33 ... Gimbal part, 34 ... Substrate, 35 ... 1st side plate, 36 ... 2nd side plate, 37 ... 3rd side plate, 38 ... 4th side plate, 39 ... Overhang, 40 ... Positioning recess, 41 ... Side, 50 ... Case, 51 ... 1st frame portion, 52 ... 2nd frame portion, 53 ... 3rd frame portion, 54 ... 4th frame portion, 55 ... 1st inclined frame portion, 56 ... 2nd inclined frame portion, 57 ... 3rd inclined frame portion , 58 ... Coil arrangement hole, 60 ... Flexible printed board, 61 ... 1st board part, 62 ... 2nd board part, 64 ... Magnetic plate, 65 ... Magnetic sensor, 70 ... Gimbal frame main body, 71 ... 1st gimbal frame Extension part, 72 ... 2nd gimbal frame extension part, 73 ... center hole, 75 ... center plate part, 76 ... square plate part, 81 ... 1st gimbal frame extension part 1st extension part, 82 ... 1st Gimbal frame extension part 2nd extension part, 84 ... Passing part, 85 ... 2nd gimbal frame extension part 1st extension part, 86 ... 2nd gimbal frame extension part 2nd extension part, 90 ... Sphere fixing Part, 91 ... Plate part, 92 ... Foot part, 94 ... Arm part, 95 ... Protruding plate part, 96 ... Extension plate part, 97 ... Foot protrusion plate part, 98 ... Foot extension plate part, 99 ... Foot Passing part, 101 ... Back wall part, 102 ... Side wall part, 141 ... Intermediate part, 142 ... First tapered part, 143 ... Second tapered part, 144 ... Groove part, 145 ... Opening part, 146 ... Opposing wall part, H1 ... Circumferential width of the support portion, H2 ... Circumferential width of the passing portion, H3 ... Circumferential spacing of the pair of arms, L ... Optical axis, M ... Tip and side surface of the pair of arms (opposing wall portion) ), N ... thickness dimension of the support portion in the first axial direction, N1 ... thickness dimension of the edge portion in the first axial direction, N2 ... protrusion dimension of the convex portion in the first axial direction, P1, P2 ... Welding position, R1 ... 1st axis, R2 ... 2nd axis

Claims (12)

A movable body with a camera module and
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. Supporting gimbal mechanism and
It has a fixed body that supports the movable body via the gimbal mechanism, and has.
The gimbal mechanism includes a gimbal frame and a movable body connecting mechanism that rotatably connects the gimbal frame and the movable body around the first axis.
The movable body connecting mechanism includes a movable body side gimbal frame receiving member including a sphere and a metal thrust receiving member to which the sphere is fixed, and a movable body side support portion having a concave curved surface in contact with the sphere in the gimbal frame. With
The movable body includes a holder that surrounds the outer peripheral side of the camera module.
The holder includes a holding portion that holds the movable body side gimbal frame receiving member at a position where the first axis passes through the center of the sphere.
When the direction along the optical axis is the optical axis direction and the direction along the first axis is the first axis direction,
The movable body side gimbal frame receiving member includes an arm portion extending toward the outer peripheral surface of the camera module, and the arm portion overlaps with the movable body side support portion when viewed from the optical axis direction.
An optical unit with a runout correction function, wherein the distance between the tip of the arm portion and the outer peripheral surface in the first axial direction is narrower than the thickness dimension of the movable body side support portion in the first axial direction. The holder has a tubular shape
The runout according to claim 1, wherein the holder is provided with an overhanging portion that projects to the outer peripheral side at a diagonal position in the first axial direction, and the holding portion is formed inside the overhanging portion. Optical unit with correction function. The overhanging portion extends in the optical axis direction on both sides of the back wall portion that contacts the thrust receiving member in the first axial direction from the side opposite to the movable body side support portion and the circumferential direction of the back wall portion. A pair of side wall portions facing each other in the circumferential direction are provided.
The optical unit with a runout correction function according to claim 2, wherein the pair of side wall portions positions the movable body side support portion in the circumferential direction. The optical unit with a runout correction function according to claim 2 or 3, wherein the holder includes a positioning portion for positioning the thrust receiving member in the optical axis direction. The holder is made of metal
The camera module is fitted on the inner peripheral side of the holder.
The optical unit with a runout correction function according to any one of claims 1 to 4, wherein the thrust receiving member is welded to the holder. The optical unit with a runout correction function according to claim 5, wherein the thrust receiving member projects from an end portion of the overhanging portion in the optical axis direction. When one of the optical axis directions is the first direction, the other of the optical axis directions is the second direction, and the circumference of the optical axis is the circumferential direction.
The thrust receiving member includes a sphere fixing portion to which the sphere is fixed, a plate portion facing the support portion in the first axial direction via the sphere, and the sphere fixing portion of the plate portion. A pair of the arm portions projecting from both ends in the circumferential direction in two directions to the side where the support portion is located are provided.
Each of the pair of the arm portions has a protruding plate portion that bends in the first axial direction from the circumferential end of the plate portion and the peripheral direction from the end of the protruding plate portion opposite to the plate portion. With an extended plate portion that bends to the opposite side of the plate portion,
In each of the pair of arms, the extension plate portion faces the outer peripheral surface, and the distance between the extension plate portion and the outer peripheral surface in the first axial direction is the first of the movable body side support portions. The optical unit with a runout correction function according to any one of claims 1 to 6, which is narrower than the thickness dimension in the uniaxial direction. The movable body side support portion includes a convex portion on which the concave curved surface is formed and an edge portion extending from the convex portion to both sides in the circumferential direction.
In each of the pair of arms, the protruding plate portion overlaps with the edge portion when viewed from the optical axis direction.
The distance between the extension plate portion and the outer peripheral surface in the first axial direction is narrower than the thickness dimension of the movable body side support portion in the first axial direction.
The runout correction according to claim 7, wherein the thickness dimension of the movable body side support portion in the first axial direction includes the protrusion dimension of the convex portion in the first axial direction and the thickness dimension of the edge portion. Optical unit with function. The optical unit with a runout correction function according to claim 8, wherein the edge portion is formed concentrically around the convex portion. The gimbal frame includes a first gimbal frame extension portion extending in the optical axis direction via between the pair of projecting plate portions.
The first gimbal frame extension portion includes the movable body side support portion at the tip in the first direction, and is a passing portion located between the pair of projecting plate portions in the second direction of the movable body side support portion. With
According to claim 7, the width dimension of the movable body side support portion in the circumferential direction is longer than the width dimension of the passing portion in the circumferential direction, and is longer than the distance between the pair of protruding plate portions. The optical unit with a runout correction function according to any one of 9. The gimbal mechanism includes a fixed body connecting mechanism that rotatably connects the gimbal frame and the fixed body around the second axis.
The fixed body connecting mechanism includes a fixed body side gimbal frame receiving member including the sphere and the metal thrust receiving member to which the sphere is fixed, and a fixed body side support having the concave curved surface in contact with the sphere in the gimbal frame. With a department,
The fixed body includes a case that surrounds the outer peripheral side of the movable body, and the case includes a notch portion that cuts out a position through which the second axis passes in the optical axis direction.
The fixed body side gimbal frame receiving member is arranged in the notch portion and is held at a position where the second axis passes through the center of the sphere, according to any one of claims 1 to 10. The described optical unit with runout correction function. The case is made of metal
The optical unit with a runout correction function according to claim 11, wherein the thrust receiving member provided on the fixed body side gimbal frame receiving member is welded to the case.

Images