JP2017016114A - Optical unit with shake correction function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical unit with a shake correction function that can realize both of setting the center position of mass of a movable body to an appropriate position and miniaturization of the movable body.SOLUTION: In an optical unit 100 with a shake correction function, a movable body 10 supporting an optical module 1 with a holder 40 is oscillated by a magnetic driving mechanism 51 for correcting the shake. The holder used in the movable body 10 includes a frame 41 holding the optical module 1 inside, and a plurality of wall sections 43, 44, 45, and 46 each supporting a coil 53 while projecting toward the optical axis direction from the frame. The plurality of wall sections 43, 44, 45, and 46 are respectively provided with metal members 80. Metal weights 11 are fixed to respective tip ends 430, 440, 450, and 460 of the wall sections 43, 44, 45, and 46 for adjusting the center of mass of the movable body 10 in the optical axis L direction.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an optical unit with a shake correction function capable of correcting shake of an optical module.

  In the imaging optical unit, a movable body holding an imaging optical module with a holder is supported so as to be swingable by a gimbal mechanism or the like at an intermediate position in the optical axis direction, and the movable body is supported by a magnetic drive mechanism or the like. There has been proposed a configuration in which the shake of the optical module is corrected by swinging around an axis intersecting the optical axis. At that time, if the position of the center of gravity of the movable body is separated from the support position by the gimbal mechanism or the like, it is difficult to smoothly swing the movable body. Therefore, a configuration has been proposed in which a metal weight is fixed to the end of the optical module, and the center of gravity position of the movable body in the optical axis direction is adjusted to be close to the support position by a gimbal mechanism or the like (see Patent Document 1). ).

JP2015-64501A

  However, only a weight having a small size in the direction orthogonal to the optical axis can be attached to the end of the optical module. For this reason, in order to properly adjust the position of the center of gravity, it is necessary to attach a weight having a large size in the optical axis direction, which hinders downsizing the movable body in the optical axis direction.

  In view of the above problems, an object of the present invention is to provide an optical device with a shake correction function capable of realizing both the setting of the center of gravity of a movable body to an appropriate position and the miniaturization of the movable body in the optical axis direction. To provide a unit.

  In order to solve the above-described problems, an optical unit with a shake correction function according to the present invention includes a movable body that holds an optical module with a holder, a fixed body that supports the movable body in a swingable manner, and one of a magnet and a coil. A plurality of first magnetic elements held by the holder, and a second magnetic element made of the other of a magnet and a coil and held by the fixed body, wherein the holder includes the optical module. A frame portion that is held inside, and a plurality of wall portions that protrude from the frame portion along the optical axis and hold the plurality of first magnetic elements, respectively, and the movable body has a tip portion of the wall portion And a metal weight connected to each other.

  In the present invention, since the weight is connected to the end of the wall portion outside the optical module, the size of the weight in the direction perpendicular to the optical axis can be increased as compared with the case where the weight is attached to the optical module. . For this reason, even when the gravity center position of the movable body in the optical axis direction is adjusted to an appropriate position by the weight, the dimension (thickness) of the weight in the optical axis direction may be small. For this reason, since the dimension of the movable body including the weight in the optical axis direction can be reduced, the optical unit with a shake correction function can be downsized.

  In the present invention, it is preferable that the weight is a cylindrical or frame-shaped member surrounding the optical axis, and is connected to each of the tip end portions of the plurality of wall portions. According to this configuration, the wall portion can be reinforced by the weight.

  In the present invention, it is preferable that the weight is formed with a step portion in which the distal end portions of the plurality of wall portions abut from an optical axis direction and a direction orthogonal to the optical axis. According to such a configuration, it is possible to improve the positional accuracy of the weight in the optical axis direction and in the direction orthogonal to the optical axis.

  In the present invention, the tip portions of the plurality of wall portions are provided with convex portions that protrude along the optical axis, and the outer peripheral surface of the weight is provided with a notch into which the convex portions are fitted. Is preferred. According to such a configuration, the positional accuracy in the direction orthogonal to the optical axis of the weight can be improved.

  In this invention, it is preferable that the said convex part is metal, and the said weight is connected with the said convex part by welding. According to such a configuration, the weight can be firmly fixed.

  In the present invention, the fixed body includes a cover that opposes the weight in the optical axis direction, and the cover protrudes inward in the radial direction of the weight to restrict the swing range of the movable body. It is preferable to provide the part. According to such a configuration, it is possible to prevent excessive swinging of the movable body due to an impact applied from the outside.

  In the present invention, a stopper mechanism is provided between the plurality of wall portions and the fixed body to restrict the movable range of the holder by contacting when the holder is displaced in a direction perpendicular to the optical axis. It is preferable. According to such a configuration, excessive displacement of the movable body can be prevented.

  In this invention, it is preferable that the spring member which controls the attitude | position of the said movable body is connected with respect to the said holder and the said fixed body on the opposite side to the said wall part of the said frame part. According to such a configuration, the spring member that regulates the posture of the movable body can be provided even when the weight is provided at the tip of the wall portion on the side opposite to the frame portion.

  In the present invention, since the weight is connected to the wall portion outside the optical module, the size of the weight in the direction perpendicular to the optical axis can be increased as compared with the case where the weight is connected to the optical module. For this reason, the dimension (thickness) of the weight in the optical axis direction may be small in order to adjust the position of the center of gravity of the movable body in the optical axis direction to an appropriate position. For this reason, since the dimension of the movable body including the weight in the optical axis direction can be reduced, the optical unit with a shake correction function can be downsized.

It is a perspective view of an optical unit with a shake correction function to which the present invention is applied. It is sectional drawing of the optical unit shown in FIG. It is a disassembled perspective view of the optical unit shown in FIG. It is a disassembled perspective view of the movable body shown in FIG. It is a top view of the optical unit which removed the case and weight shown in FIG. It is a disassembled perspective view of the support mechanism shown in FIG. It is explanatory drawing of the support mechanism shown in FIG. It is explanatory drawing which shows the modification of the holder of the optical unit to which this invention is applied.

Embodiments of an optical unit with a shake correction function to which the present invention is applied will be described below with reference to the drawings. In this specification, the three axes of XYZ are directions orthogonal to each other, one side in the X-axis direction is indicated by + X, the other side is indicated by -X, one side in the Y-axis direction is indicated by + Y, and the other side is indicated by -Y. , One side in the Z-axis direction is indicated by + Z and the other side is indicated by -Z. The Z-axis direction is a direction along the optical axis L (lens optical axis) of the optical module provided in the optical unit. Further, the −Z direction is the image side in the optical axis L direction, and the + Z direction is the subject side in the optical axis L direction.

(overall structure)
FIG. 1 is a perspective view of an optical unit with a shake correction function (hereinafter referred to as an optical unit 100) to which the present invention is applied, and FIG. 1 (a) is a perspective view seen from the subject side (+ Z direction side). (B) is the perspective view seen from the image side (-Z direction side). FIG. 2 is a sectional view of the optical unit 100 shown in FIG. 1 (AA sectional view of FIG. 1A). FIG. 3 is an exploded perspective view of the optical unit 100 shown in FIG.

  The optical unit 100 shown in FIG. 1 is mounted on an optical device such as a mobile phone with a camera or a drive recorder. The optical unit 100 is used for optical devices such as action cameras and wearable cameras mounted on helmets, bicycles, radio controlled helicopters and the like. In such an optical unit 100, when a shake occurs in the optical device during photographing, the captured image is disturbed. Therefore, the optical unit 100 is configured as an optical unit with a shake correction function that can correct the shake of the optical device. The rotation around the X axis of the optical unit 100 corresponds to so-called pitching (pitch), the rotation around the Y axis corresponds to so-called yawing (rolling), and the rotation around the Z axis corresponds to so-called rolling. .

  As shown in FIGS. 2 and 3, the optical unit 100 includes a movable body 10, a fixed body 20, a support mechanism 30 that supports the movable body 10 so as to be swingable with respect to the fixed body 20, and the movable body 10. A shake correction drive mechanism 50 that generates a magnetic drive force that is displaced relative to the fixed body 20 and a spring member 70 that is connected to the movable body 10 and the fixed body 20 are provided. The optical unit 100 is electrically connected to an upper control unit or the like provided on the main body side of the optical device on which the optical unit 100 is mounted via a flexible wiring board (not shown). Further, the optical unit 100 or the optical device is equipped with a gyroscope (a shake detection sensor) (not shown), and when the shake occurs in the optical device, the gyroscope detects the shake and outputs the shake to the host control device. . The control device drives the shake correction drive mechanism 50 to swing the movable body 10 about the axis intersecting the optical axis L to perform shake correction.

  The movable body 10 is supported by the fixed body 20 through a support mechanism 30 (gimbal mechanism), which will be described later, so as to be swingable about a first axis R1 (see FIG. 1A) intersecting the optical axis L. And is swingably supported around a second axis R2 (see FIG. 1A) intersecting the optical axis L and the first axis R1. In this embodiment, the first axis R1 and the second axis R2 are orthogonal to the optical axis L. The first axis R1 and the second axis R2 are orthogonal to each other.

(Configuration of fixed body 20)
The fixed body 20 includes a case 210 and a base 250 having a square outer shape when viewed in the Z-axis direction. The case 210 is assembled to the base 250 from the + Z direction side, and is fixed to the base 250 by welding or the like. The case 210 includes a rectangular tubular body 211 surrounding the movable body 10 and a rectangular frame-shaped end plate 212 projecting inward from the + Z direction end of the body 211. A rectangular window 214 is formed in the end plate portion 212. The body portion 211 includes a side plate portion 216 located on the + X direction side, a side plate portion 217 located on the −X direction side, a side plate portion 218 located on the + Y direction side, and a side plate portion 219 located on the −Y direction side. Is provided. Of the side plate portions 216, 217, 218, and 219, a protruding portion 213 that protrudes in the −Z direction is formed at a corner portion where adjacent side plate portions are connected.

The base 250 includes a rectangular frame-shaped bottom portion 251 in which an opening 252 is formed, and side wall portions 253, 254, 255, and 256 that rise in the + Z direction at the four corners of the bottom portion 251. When the case 210 is assembled to the base 250, the protruding portions 213 of the case 210 cover the side wall portions 253, 254, 255, 256. Each of the side wall portions 253 and 255 formed at diagonal positions on the first axis R1 is provided with an overhang portion 257 that projects to the inner peripheral side. A first contact spring holding portion 31 that forms the first swing support portion 36 of the support mechanism 30 is formed on the overhang portion 257. The first contact spring holding portion 31 includes a recess 311 formed in the overhang portion 257, a contact spring support portion 312 that protrudes in the + Z direction on the inner peripheral side of the recess 311, and a restriction portion 313 that is positioned on the outer peripheral side of the recess 311. Is provided. The restricting portion 313 is a portion located on the outer peripheral side of the recessed portion 311 in the overhang portion 257.

  As shown in FIGS. 1 and 2, the fixed body 20 has a plate-like cover 29 fixed to the end plate portion 212 of the case 210. The cover 29 has an opening 291 smaller than the window 214 at a position overlapping the window 214 of the case 210. The cover 29 is formed with a stopper convex portion 292 that protrudes from the edge of the opening portion 291 to the inside of the case 210 (−Z direction). The stopper convex portion 292, together with the weight 11 described later, constitutes a stopper mechanism that regulates the swing range of the movable body 10.

(Configuration of shake correction drive mechanism 50)
The shake correction drive mechanism 50 includes four sets of magnetic drive mechanisms 51 provided between the fixed body 20 and the movable body 10. Each of the magnetic drive mechanisms 51 includes a magnet 52 and a coil 53, and the first magnetic element including one of the magnet 52 and the coil 53 is held by the movable body 10, and The other second magnetic element is held by the fixed body 20.

  The coil 53 (first magnetic element) is an air-core coil and is held on the side surface on the + X direction side, the side surface on the −X direction side, the side surface on the + Y direction side, and the side surface on the −Y direction side of the movable body 10. . The magnet 52 (second magnetic element) includes an inner surface of the side plate portion 216 positioned on the + X direction side, an inner surface of the side plate portion 217 positioned on the −X direction side, and a side plate positioned on the + Y direction side. It is held on the inner surface of the portion 218 and the inner surface of the side plate portion 219 located on the −Y direction side. Therefore, between the movable body 10 and the body portion 211 of the case 210, the magnet 52 and the coil 53 face each other on the + X direction side, the −X direction side, the + Y direction side, and the −Y direction side. Yes.

  The magnet 52 is magnetized with different poles on the outer surface side that contacts the body 211 and the inner surface side that faces the coil 53. Further, the magnet 52 is divided into two in the optical axis L direction (that is, the Z-axis direction), and the magnetic poles on the inner surface side are magnetized so as to be different at the dividing position. For this reason, the coil 53 uses a pair of long side portions positioned in the Z direction as effective sides. The four magnets have the same magnetization pattern on the outer surface side and the inner surface side. The case 210 is made of a magnetic material and functions as a yoke for the magnet 52.

(Configuration of movable body 10)
4 is an exploded perspective view of the movable body 10 shown in FIG. FIG. 4 also shows a state in which the weight 11 is reversed in the Z direction. FIG. 5 is a plan view of the optical unit 100 with the case 210 and the weight 11 shown in FIG. 1 removed.

As shown in FIG. 4, the movable body 10 includes an optical module 1, a holder 40 that holds the optical module 1, and a weight 11 that is fixed to the + Z direction side of the holder 40. The optical module 1 is arranged so that the optical axis L faces the Z-axis direction. The optical module 1 includes, for example, an upper module 2 that incorporates a lens as an optical element, an imaging device, and the like, and a lower module 3 that incorporates electronic components such as a gyroscope and a wiring board. The upper module 2 has a rectangular parallelepiped outer shape. A cylindrical lens holder 4 protrudes from the surface of the upper module 2 in the + Z direction. The lower module 3 has a rectangular parallelepiped shape that is slightly larger than the upper module 2. The lower module 3 is located on the −Z direction side of the upper module 2 and protrudes outward from the upper module 2 by the same dimension in the + X direction side, the −X direction side, the + Y direction side, and the −Y direction side. When the optical module 1 is viewed in the Z-axis direction, the lens holder 4 is circular with the optical axis L as the center, but the outer shape of the upper module 2 and the lower module 3 is square.

(Configuration of holder 40)
The holder 40 constitutes the outer peripheral portion of the movable body 10. The holder 40 includes a frame portion 41 having a substantially rectangular planar shape when viewed from the Z-axis direction, specifically a substantially square planar shape. Inside the frame part 41 is a rectangular holding hole 42 for holding the upper module 2 of the optical module 1. The holder 40 is a plate-like wall portion 43 protruding in the + Z direction along the optical axis L from each side edge of the frame portion 41 on the + X direction side, the −X direction side, the + Y direction side, and the −Y direction side. 44, 45, 46. The wall portions 43, 44, 45, 46 are arranged so as to surround the outer peripheral side of the holding hole 42, and extend linearly at the center of each side edge of the frame portion 41. Between the outer peripheral surface of the upper module 2 disposed in the holding hole 42 and the wall portions 43, 44, 45, 46, a space in which a movable frame 39 of the support mechanism 30 described later is disposed is formed.

  Each of the wall portions 43, 44, 45, 46 includes a coil holding portion 47 formed on an outer surface facing the side opposite to the holding hole 42. The coil holding part 47 is a rectangular convex part protruding from the outer surface of the wall parts 43, 44, 45, 46. A coil 53 of the magnetic drive mechanism 51 is disposed on the outer peripheral side of the coil holding portion 47. The coil 53 is fixed to the outer surface of the wall portions 43, 44, 45, 46 with an adhesive or the like with the coil holding portion 47 fitted in the center thereof. In a state where the coil 53 is fixed to the wall portions 43, 44, 45, 46, as shown in FIG. 5, the coil 53 is opposed to both side end surfaces of the wall portions 43, 44, 45, 46 as viewed from the optical axis L direction. The width of the coil 53 in the direction along the wall portions 43, 44, 45, 46 is set larger than the width of the wall portions 43, 44, 45, 46. Since the fulcrum portions 391 provided at four locations around the optical axis L of the coil 53 are provided at the four corners of the body portion 211 of the case 210, the fulcrum portions 391 of the coil 53 with respect to the width of the wall portions 43, 44, 45, 46 are provided. Even when the width is increased, the width of the gap between the wall portions adjacent in the circumferential direction (gap portions 401, 402, 403, 404) and the width of the gap between the coils 53 adjacent in the circumferential direction are substantially the same. can do. The coil 53 may be formed by winding a coil around the coil holding part 47, or a coil formed in the shape of an air-core coil in advance may be attached to the coil holding part 47.

  As shown in FIG. 2, the coil holding portion 47 protrudes from the center of the coil 53 toward the magnet 52 on the fixed body 20 side, and faces the magnet 52. When the movable body 10 is displaced in a direction (X-axis direction or Y-axis direction) intersecting the optical axis L due to vibration applied from the outside, the coil holding portion 47 contacts the magnet 52 and the movable body 10 moves. Regulate the range. In this way, the stopper mechanism 19 is configured between the wall portions 43, 44, 45, 46 and the fixed body 20.

  The frame portion 41 includes notches 48 formed at diagonal positions on the first axis R1. The notch 48 is a part obtained by cutting two corners located at diagonal positions on the first axis R1 along a plane perpendicular to the first axis R1. As shown in FIG. 5, the notch 48 includes a gap 401 provided between the wall portion 43 on the X direction side and the wall portion 45 on the + Y direction side, and the wall portion 44 and −Y on the −X direction side. It is arranged in a gap 402 provided between the direction side walls 46. When the movable body 10 is assembled to the fixed body 20, the projecting portion 257 provided at a diagonal position on the first axis R <b> 1 of the base 250 faces the notch 48. As a result, the first contact spring holding portion 31 provided in the overhang portion 257 is positioned diagonally on the first axis R1 of the frame portion 41, and the gap portion 401 between the wall portion 43 and the wall portion 45, and the wall It is disposed in the gap 402 between the portion 44 and the wall portion 46.

  At the diagonal position on the second axis R <b> 2 of the frame portion 41, a second contact spring holding portion 32 that constitutes the second swing support portion 37 of the support mechanism 30 is formed. The second contact spring holding portion 32 includes a gap portion 403 provided between a wall portion 43 on the + X direction side and a wall portion 46 on the −Y direction side, and a wall portion 44 on the −X direction side and a wall on the + Y direction side. It is arranged in a gap portion 404 provided between the portions 45. The second contact spring holding portion 32 includes a contact spring support portion 322 that rises in the + Z direction, a protrusion portion 321 that protrudes from the root portion of the contact spring support portion 322 to the outer peripheral side, and a protrusion portion 321 that protrudes in the + Z direction. The regulation part 323 to be provided is provided.

  The outer peripheral surface of the frame portion 41 has a shape in which each surface on the + X direction side, the −X direction side, the + Y direction side, and the −Y direction side has a step at an intermediate position in the Z-axis direction. That is, a portion on the + Z direction side of the outer peripheral surface of the frame portion 41 forms a protruding portion 411 protruding to the outer peripheral side (see FIG. 4). On the other hand, a portion on the −Z direction side of the outer peripheral surface of the frame portion 41 forms a stepped portion 412 that is recessed toward the inner peripheral side. The step 412 is formed with a fixing convex portion 413 that protrudes to the outer peripheral side at the center of each surface facing the + X direction side, the −X direction side, the + Y direction side, and the −Y direction side. As will be described later, the fixing convex portion 413 functions as an engaging portion that engages a spring member 70 formed of a plate spring.

  As shown in FIG. 2, the holder 40 has the upper module 2 disposed in the holding hole 42, and the optical module 1 is placed in a state where the lower end portion of the frame portion 41 and the upper end portion of the lower module 3 are in contact with each other in the Z-axis direction. Hold. When the movable body 10 is assembled to the fixed body 20, at the lower end portion of the optical unit 100, as shown in FIG. 1B and FIG. The lower part and the lower module 3 protrude.

(Detailed configuration of holder 40)
The holder 40 is made of resin, and has a resin part 49 constituting the frame part 41 and the wall parts 43, 44, 45, 46. The holder 40 is composed of a composite part including a plate-like metal member 80 in each of the wall portions 43, 44, 45, and 46, and the metal member 80 is used as a reinforcing core material. In this embodiment, the holder 40 is an insert-molded product of the metal member 80, and the resin portion 49 and the metal member 80 are integrated.

  The metal member 80 is provided independently on each of the plurality of wall portions 43, 44, 45, 46. In this embodiment, one metal member 80 is embedded in each of the plurality of wall portions 43, 44, 45, 46. In each of the plurality of wall portions 43, 44, 45, 46, the metal member 80 includes a first support column 86 extending from the inside of the frame portion 41 to the subject side (+ Z direction side) along the optical axis L; In parallel with the first support column 86, a second support column 87 extending from the inside of the frame unit 41 along the optical axis L to the subject side (+ Z direction side) is provided. Further, the metal member 80 includes a connecting portion 88 that connects the end portion of the first support column portion 86 and the end portion of the second support column portion 87 on the frame portion 41 side. Therefore, the metal member 80 has a U-shaped planar shape. In this embodiment, the connecting portion 88 is located inside the wall portions 43, 44, 45, 46.

(Configuration of weight 11)
The metal member 80 includes an exposed portion exposed from the resin portion 49 at the tip portions 430, 440, 450, 460 of the wall portions 43, 44, 45, 46. More specifically, the front end portion of the first support column portion 86 and the front end portion of the second support column portion 87 are convex portions 861 and 871 protruding from the resin portion 49, and the convex portions 861 and 871 are It is an exposed part from the resin part 49.

The metal weights 11 that adjust the position of the center of gravity of the movable body 10 in the optical axis L direction are connected to each other using the tip portions 430, 440, 450, and 460 configured as described above. In this embodiment, the weight 11 is a cylindrical or frame-like member in which an opening 13 surrounding the optical axis L is formed, and is connected to each of the front end portions 430, 440, 450, and 460. More specifically, the weight 11 is a rectangular frame-shaped plate member that overlaps the tip portions 430, 440, 450, and 460 when viewed from the Z direction, and the image side surface of the weight 11 in the optical axis L direction is The tip portions 430, 440, 450, and 460 are fixed to the tip portions 430, 440, 450, and 460 in a state of overlapping with the tip portions 430, 440, 450, and 460.

  Here, on the end face on the outer peripheral side of the weight 11, two notches 12 into which the convex portions 861 and 871 of the metal member 80 are fitted are formed on one side. Further, on the end surface on the −Z direction side of the weight 11, a step portion 14 with which the front end portions 430, 440, 450, 460 abut from the optical axis L direction and the direction orthogonal to the optical axis L (X direction or Y direction). Is formed. Therefore, as shown in FIG. 3, when the weight 11 is overlapped with the tip portions 430, 440, 450, and 460, the convex portions 861 and 871 fit into the notch 12, and the weight 11 is in the X direction, Y direction, and Z direction. Positioned. When the weight 11 is overlapped with the tip portions 430, 440, 450, and 460, the tip portions 430, 440, 450, and 460 contact the stepped portion 14, and the weight 11 is positioned in the X direction, the Y direction, and the Z direction. The In this state, the weight 11 is fixed to the convex portions 861 and 871 of the metal member 80. In this embodiment, the weight 11 is fixed to the convex portions 861 and 871 of the metal member 80 by welding. As a result, the center of gravity of the movable body 10 in the direction of the optical axis L is close to the support position by the support mechanism 30 (gimbal mechanism). In this embodiment, the position of the center of gravity of the movable body 10 and the support position by the support mechanism 30 (gimbal mechanism) coincide with each other in the optical axis L direction.

  When the optical unit 100 is assembled using the movable body 10 having such a weight 11, the stopper convex portion 292 of the cover 29 shown in FIG. 2 is radially inward of the inner peripheral surface of the opening 13 of the weight 11. opposite. Therefore, when the movable body 10 swings excessively due to an impact applied from the outside, the stopper convex portion 292 of the cover 29 and the inner surface of the opening 13 of the weight 11 come into contact with each other, and the swing range of the movable body 10 is reduced. Can be regulated.

  The metal member 80 is independent for each of the wall portions 43, 44, 45, 46, but the metal member 80 provided on the wall portions 43, 44, 45, 46 is formed with a convex portion 861 during insert molding. , 871 are connected together by a connecting portion (not shown). And after insert molding, it cut | disconnects between a connection part and the 1st support | pillar part 86, and between a connection part and the 2nd support | pillar part 87. FIG.

(Configuration of the spring member 70)
The spring member 70 shown in FIG. 3 is a member that connects the fixed body 20 and the movable body 10 and defines the posture of the movable body 10 when the shake correction drive mechanism 50 is in a stopped state. The spring member 70 is a rectangular frame-shaped spring member obtained by processing a metal plate. The spring member 70 includes a fixed body side connecting portion 71 connected to the fixed body 20, a movable body side connecting portion 72 connected to the movable body 10, and an arm portion that connects the fixed body side connecting portion 71 and the movable body side connecting portion 72. 73 is provided. As shown in FIG. 1B, fixing convex portions 258 protruding in the −Z direction are formed at the four corners of the bottom portion 251 when the base 250 is viewed from the −Z direction side. The fixed body side connecting portion 71 is formed on the outer peripheral portion of the spring member 70, and a hole into which the fixing convex portion 258 is fitted is formed. On the other hand, the movable body side connecting portion 72 is formed on the inner peripheral edge of the spring member 70. In the movable body side connecting portion 72, a concave portion is formed at a position corresponding to the fixing convex portion 413 formed on the outer peripheral surface of the holder 40.

  The spring member 70 is attached so as to surround the portion of the movable body 10 (the frame portion 41 of the holder 40) that overlaps the bottom portion 251 of the base 250 from the −Z direction side and protrudes from the opening portion 252 of the base 250. The fixed body side connecting portion 71 of the spring member 70 is fixed to the fixing convex portion 258, and the movable body side connecting portion 72 of the spring member 70 is engaged with the fixing convex portion 413. Thereby, the fixed body 20 and the movable body 10 are connected via the spring member 70.

(Configuration of support mechanism 30)
FIG. 6 is an exploded perspective view of the support mechanism 30 shown in FIG. FIG. 7 is an explanatory view of the support mechanism 30 shown in FIG. 1, FIG. 7A is a perspective view of the support mechanism 30 assembled, and FIG. 7B is a cross-sectional view of the first swing support portion ( 7A is a partial cross-sectional view taken along the line BB in FIG. 7A. FIG. 7C is a cross-sectional view of the second swing support portion (a partial cross-sectional view taken along the line CC in FIG. 7A). ).

  In the optical unit 100 of the present embodiment, when the movable body 10 is swingably supported around the first axis R1 and the second axis R2, the gap between the base 250 of the fixed body 20 and the holder 40 of the movable body 10 is between The support mechanism 30 described below is configured. In this embodiment, a gimbal mechanism is used as the support mechanism 30. The support mechanism 30 (gimbal mechanism) includes a first swing support portion 36 provided at two locations spaced apart in the first axis R1 direction and a second swing support provided at two locations spaced apart in the second axis R2 direction. A support portion 37 and a movable frame 39 supported by the first swing support portion 36 and the second swing support portion 37 are provided.

  The movable frame 39 is a gimbal spring made of a substantially rectangular leaf spring. The movable frame 39 includes a fulcrum portion 391 that supports the movable body 10 so as to be swingable at four locations around the optical axis L, and a connecting portion 392 that connects adjacent fulcrum portions 391 around the optical axis L. Two of the fulcrum portions 391 are provided at diagonal positions on the first axis R1, and the remaining two places are provided at diagonal positions on the second axis R2. The connecting portion 392 includes a meandering portion 393 that extends in the X-axis direction or the Y-axis direction, and a linear portion 394 that extends from both ends of the meandering portion 393 to the fulcrum portion 391. The meandering portion 393 extends in the X-axis direction or the Y-axis direction while meandering in a plane perpendicular to the Z-axis direction (that is, the optical axis L direction). More specifically, the meandering portion 393 is located on the inner side of each of the wall portions 43, 44, 45, 46 and outside the side surface of the upper module 2 of the optical module 1. , 44, 45, 46 are formed so as to extend along the respective wall parts 43, 44, 45, 46 so as to be folded toward and away from each other. That is, the meandering portion 393 is formed by bending the curved portion between the wall portions 43, 44, 45, 46 arranged in parallel with each other and the side surface of the upper module 2. In at least the non-operating state of the optical unit 100, the meandering portion 393 is separated from the wall portions 43, 44, 45, 46 and the side surface of the upper module 2 and is not in contact. Therefore, the meandering portion 393 can be elastically deformed in a direction orthogonal to the optical axis L.

  The movable frame 39 is formed, for example, by etching a metal plate. In this embodiment, the width of the movable frame 39 is narrower than the thickness. Therefore, in this embodiment, the movable frame 39 is configured by stacking two sheets after etching the metal plate. Therefore, the movable frame 39 has an appropriate spring property.

  Each fulcrum part 391 extends in the circumferential direction. A metal sphere 38 is fixed to the inner peripheral surface of each fulcrum 391 by welding or the like. By this spherical body 38, each fulcrum 391 is provided with a hemispherical convex surface facing the center of the movable frame 39. A straight line portion 394 extends in parallel from both ends in the circumferential direction of each fulcrum portion 391 toward the inner peripheral side. Accordingly, the fulcrum part 391 is an extending part extending in the circumferential direction to which the sphere 38 is fixed, and is a part connecting two linear parts 394 extending in parallel. The straight line portion 394 extends to the inner peripheral side of the wall portions 43, 44, 45, 46 and is connected to the meandering portion 393 on the inner peripheral side of the wall portions 43, 44, 45, 46.

The first swing support portion 36 includes a first contact spring holding portion 31 provided on the base 250 of the fixed body 20 and a first contact spring 33 held by the first contact spring holding portion 31. The first contact spring 33 is a metal leaf spring bent in a U shape. The first contact spring 33 includes a fixed-side leaf spring portion 331 and a movable-side leaf spring portion 332 that extend in the Z-axis direction, and a fixed-side leaf spring portion 331 and a movable-side leaf spring portion 332 that extend in a direction crossing the Z-axis direction. And a bent portion 334 that protrudes from the end in the + Z direction of the movable side leaf spring portion 332 to the side opposite to the fixed side leaf spring portion 331 (that is, the outer peripheral side). The first contact spring 33 contacts the contact-side spring support portion 312 of the first contact spring holding portion 31 in the direction perpendicular to the optical axis L direction (first axis R1 direction) and is turned back. The portion 333 is disposed so as to contact the bottom surface of the recess 311 in the optical axis L direction. Accordingly, the first contact spring 33 is supported by the contact spring support portion 312 in a direction orthogonal to the optical axis L direction (the first axis R1 direction), and at the image side (− in the optical axis L direction by the bottom surface of the recess 311. Z direction).

  The second swing support part 37 includes a second contact spring holding part 32 provided on the holder 40 of the movable body 10 and a second contact spring 34 held by the second contact spring holding part 32. The second contact spring 34 is a metal leaf spring bent in a U-shape and has the same shape as the first contact spring 33. That is, the second contact spring 34 includes a fixed-side leaf spring portion 341 and a movable-side leaf spring portion 342 that extend in the Z-axis direction, and a fixed-side leaf spring portion 341 and a movable-side leaf spring that extend in a direction crossing the Z-axis direction. And a bent portion 344 that protrudes from the end in the + Z direction of the movable side leaf spring portion 342 to the opposite side (that is, the outer peripheral side) of the fixed side leaf spring portion 341. The second contact spring 34 is configured such that the fixed side leaf spring portion 341 contacts the contact spring support portion 322 of the second contact spring holding portion 32 in a direction orthogonal to the optical axis L direction (second axis R2 direction) and is turned back. The part 343 is disposed so as to come into contact with the protruding part 321 from the image side in the optical axis L direction (−Z direction). Therefore, the second contact spring 34 is supported by the contact spring support portion 322 in a direction orthogonal to the optical axis L direction (the second axis R2 direction), and at the image side in the optical axis L direction (−Z by the protruding portion 321). Direction).

  The movable frame 39 is provided with a first swing support portion 36 on the inner peripheral side of a fulcrum portion 391 provided at a diagonal position in the first axis R1 direction, and provided at a diagonal position in the second axis R2 direction. A second swing support portion 37 is disposed on the inner peripheral side of the fulcrum portion 391, and is supported by these four swing support portions.

  The movable side leaf spring portion 332 of the first contact spring 33 and the movable side leaf spring portion 342 of the second contact spring 34 have hemispherical contact portions 335 and 345 that contact the sphere 38 welded to the fulcrum portion 391, respectively. Is formed. The first swing support part 36 and the second swing support part 37 are in a state in which they can be elastically deformed in the direction of the first axis R1 and the first contact spring 33 attached in a state of being elastically deformable in the direction of the first axis R1. The movable frame 39 is supported in a rotatable manner around each of two directions (first axis R1 direction and second axis R2 direction) orthogonal to the optical axis L direction via a second contact spring 34 attached to To do. The movable frame 39 is moved to the subject side (+ Z direction side) in the optical axis L direction by the bent portion 334 of the first contact spring 33 and the bent portion 344 of the second contact spring 34 located on the + Z direction side of the fulcrum portion 391. Movement is restricted. Further, the movable frame 39 is provided at the front end portion of the protruding portion 321 in the second contact spring holding portion 32 and the restricting portion 313 that is a portion located on the outer peripheral side of the concave portion 311 in the first contact spring holding portion 31. The restriction portion 323 restricts movement of the optical axis L direction toward the image side (−Z direction side). That is, the first swing support part 36 and the second swing support part 37 are configured such that the movable frame 39 is not detached by the movement in the optical axis L direction.

Next, a planar arrangement of the support mechanism 30 when viewed in the optical axis L direction will be described with reference to FIG. The holder 40 of the movable body 10 is provided with wall portions 43, 44, 45, 46 so as to surround the upper module 2 of the optical module 1. The holder 40 has a square shape, and wall portions 43, 44, 45, 46 extend linearly along each side of the holder 40. The corners of the holder 40 are provided with regions where the wall portions 43, 44, 45, 46 do not extend (the gap portions 401, 402, 403, 404 described above). The first swing support portion 36 and the second swing support portion 37 that support the movable frame 39 are circumferential positions where the wall portions 43, 44, 45, 46 are not provided, that is, the gap portions 401, 402, 403. , 404 are arranged. Further, the first swing support part 36 and the second swing support part 37 are located at the corners of the holder 40 and are arranged on the outer peripheral side of the wall parts 43, 44, 45, 46. Further, the first swing support portion 36 and the second swing support portion 37 that support the movable frame 39 are positioned at corners of the case 210 and the base 250 that are the fixed body 20 having a square outer shape.

  In the movable frame 39, a fulcrum part 391 supported by the first swing support part 36 and the second swing support part 37 is located on the outer peripheral side of the wall parts 43, 44, 45, 46. On the other hand, the meandering portion 393 of the movable frame 39 is located on the inner peripheral side of the wall portions 43, 44, 45, 46 and is a space between the upper module 2 of the optical module 1 and the wall portions 43, 44, 45, 46. It is arranged to pass through. The straight line portion 394 that connects the meandering portion 393 and the fulcrum portion 391 is more parallel to the first axis R1 direction or the second axis R2 direction in the gap portions 401, 402, 403, 404 than the wall portions 43, 44, 45, 46. It extends from the position on the outer peripheral side to the position on the inner peripheral side of the wall portions 43, 44, 45, 46. The meandering portion 393 and the straight portions 394 on both sides of the meandering portion are connected to a shape recessed on the inner peripheral side as a whole. An arrangementable space is formed.

  The fulcrum part 391 is located on the outer peripheral side of the coil 53 attached to the outer surface of the wall parts 43, 44, 45, 46. Further, the fulcrum part 391 is located on the outer peripheral side of the inner surface of the magnet 52 facing the coil 53 from the outer peripheral side, but is positioned on the inner peripheral side of the outer surface of the magnet 52. The inner portions of the coil 53 and the magnet 52 are disposed in a space between the fulcrum part 391 and the fulcrum part 391 together with the wall parts 43, 44, 45, 46.

  As described above, the support mechanism 30 includes the wall portions 43, 44, and the fulcrum portions 391 of the movable frame 39 at the corners of the holder 40 where the wall portions 43, 44, 45, 46 are not provided. 45 and 46 are located on the outer peripheral side. On the other hand, the connecting part 392 that connects the fulcrum part 391 and the fulcrum part 391 has a shape that is dented to the inner peripheral side so that the meandering part 393 passes through the inner peripheral side of the wall parts 43, 44, 45, 46. In this case, it is not necessary to secure a space for arranging the fulcrum portion 391 on the inner peripheral side of the wall portions 43, 44, 45, 46, and the first swing support portion 36 and the second swing support portion 37 are disposed. It is not necessary to secure a space to perform. Therefore, the wall portions 43, 44, 45, 46 can be arranged on the inner peripheral side. Therefore, the optical unit 100 can be reduced in size as a whole. Further, since the connecting portion 392 has a shape that is recessed toward the inner peripheral side, it is possible to avoid a reduction in the peripheral length of the movable frame 39 due to downsizing and a decrease in the support function.

  Further, in this embodiment, the fulcrum part 391 is located on the outer peripheral side of the inner part of the coil 53 and the magnet 52, and the connecting part 392 is recessed on the inner peripheral side between the fulcrum part 391 and the fulcrum part 391. I am doing. Therefore, the wall portions 43, 44, 45, and 46 can be arranged in the recessed space. Further, a part or the whole of the coil 53 and the magnet 52 constituting the shake correction drive mechanism 50 can be arranged in the recessed space. Therefore, a part or the whole of the shake correction drive mechanism 50 can be arranged on the inner peripheral side with respect to the fulcrum part 391, the first swing support part 36, and the second swing support part 37. Thereby, the optical unit 100 can be reduced in size as a whole.

  Further, in this embodiment, the holder 40 is rectangular, and the corner portion is used to secure a space for arranging the first swing support portion 36 and the second swing support portion 37 that support the fulcrum portion 391. Yes. Therefore, the width of the wall portions 43, 44, 45, 46 and the coil 53 can be increased while the fulcrum portion 391 is arranged on the outer peripheral side of the wall portions 43, 44, 45, 46 and the coil 53. . Therefore, it is possible to avoid a decrease in the driving force of the shake correction driving mechanism 50.

In this embodiment, the first contact spring 33 and the second contact spring 34 are supported in a direction orthogonal to the optical axis L direction by the contact spring support portion 312 or the contact spring support portion 322, respectively, and It is supported on the image side (−Z direction) in the optical axis L direction by the bottom surface or the protruding portion 321. Accordingly, the first contact spring 33 and the second contact spring 34 can be reliably supported. Further, since the restricting portion 313 is provided in the first contact spring holding portion 31 and the restricting portion 323 is provided in the second contact spring holding portion 32, the movable frame 39 is first swung by movement in the optical axis L direction. There is an advantage that the support part 36 and the second swing support part 37 are not detached.

(Main effects of this form)
As described above, the optical unit 100 according to this embodiment includes the movable body 10 that holds the optical module 1 with the holder 40 and the fixed body 20 that supports the movable body 10 so as to be swingable. The movable body 10 is swung by the drive mechanism 50 (magnetic drive mechanism 51) to correct the shake.

  Here, the holder used for the movable body 10 includes a frame portion 41 that holds the optical module 1 inside, and a plurality of plate-like members that protrude from the frame portion 41 toward the subject in the optical axis L direction and hold the coils 53. Wall portions 43, 44, 45, 46 are provided. For this reason, the size of the holder 40 in the direction orthogonal to the optical axis L can be reduced as compared with the case where a portion for holding the coil 53 is provided on the outer peripheral surface of the frame portion 41. Therefore, the optical unit 100 can be reduced in size.

  Further, since the holder 40 includes the metal member 80 in each of the plurality of wall portions 43, 44, 45, 46, the strength of the wall portions 43, 44, 45, 46 is high. In particular, in this embodiment, the wall portions 43, 44, 45, 46 are plate-shaped, but each of the wall portions 43, 44, 45, 46 includes a metal member 80, so the wall portions 43, 44, 45, 46, The strength of 46 is large. Therefore, even when the optical unit 100 is downsized, it is possible to suppress a decrease in impact resistance. In addition, since the stopper mechanism 19 is configured using the convex coil holding portions 47 provided on the plurality of wall portions 43, 44, 45, 46, even when the movable body 10 is displaced by an externally applied impact, The movable range can be limited by the stopper mechanism 19. Therefore, deformation of the spring member 70 can be suppressed. Even in this case, since the metal member 80 is provided in each of the plurality of wall portions 43, 44, 45, 46, the wall portions 43, 44 are used even if the wall portions 43, 44, 45, 46 are used for the stopper mechanism 19. 45, 46 are less likely to be deformed or damaged.

  Further, since the holder 40 is a composite part of the resin part 49 and the metal member 80 provided in the frame part 41 and the plurality of wall parts 43, 44, 45, 46, the frame part 41 and the wall part are formed by the resin part 49. It is easy to make 43, 44, 45, and 46 into an appropriate shape. Moreover, since the holder 40 is an insert-molded product of the metal member 80, a composite part of the resin portion 49 and the metal member 80 can be efficiently formed.

  In addition, the metal member 80 includes two column portions (a first column portion 86 and a second column portion 87) that extend from the frame portion 41 side on each of the plurality of wall portions 43, 44, 45, 46. Therefore, the increase in the weight of the holder 40 resulting from the use of the metal member 80 can be suppressed as compared with the case where a metal plate is disposed on the wall portions 43, 44, 45, 46. For this reason, since the weight of the movable body 10 can be reduced, the responsiveness when correcting the shake is high. The metal member 80 includes a connecting portion 88 that connects the end portion of the first support column 86 on the frame portion 41 side and the end portion of the second support column portion 87 on the frame portion 41 side. For this reason, since the intensity | strength of the 1st support | pillar part 86 and the 2nd support | pillar part 87 can be raised, the reinforcement effect with respect to the wall parts 43, 44, 45, and 46 by the metal member 80 is high. Therefore, the plurality of wall portions 43, 44, 45, 46 are not easily broken.

In this embodiment, the metal weight 11 that adjusts the position of the center of gravity of the movable body 10 in the optical axis L direction is fixed to the tip portions 430, 440, 450, 460 of the wall portions 43, 44, 45, 46 of the holder 40. ing. With this weight 11, the size of the weight 11 in the direction orthogonal to the optical axis L is larger than when the weight is attached to the optical module 1. Therefore, weight 1
In order to adjust the position of the center of gravity of the movable body 10 in the optical axis L direction by 1, the dimension (thickness) of the weight 11 in the optical axis L direction may be small. Therefore, since the dimension of the movable body 10 including the weight 11 in the optical axis L direction can be reduced, the optical unit 100 can be reduced in size.

  Here, the metal member 80 includes convex portions 861 and 871 (exposed portions) exposed from the resin portion 49 at the tip portions 430, 440, 450, and 460 of the wall portions 43, 44, 45, and 46. The portions 861 and 871 (exposed portions) and the metal weight 11 can be connected by welding. Therefore, the weight 11 can be firmly connected. Therefore, even when a stopper mechanism that defines the swing range of the movable body 10 is configured using the weight 11 and the stopper convex portion 292 of the cover 29, a problem such as the weight 11 coming off from the holder 40 occurs. Hard to do.

  The weight 11 is a frame-shaped member that surrounds the optical axis L, and each of the front end portions 430, 440, 450, 460 of the plurality of wall portions 43, 44, 45, 46 rising from the frame portion 41 of the holder 40. It is connected to. Accordingly, the weight 11 serves as a connecting plate that connects the ends of the walls 43, 44, 45, 46 on the subject side (+ Z direction side). For this reason, the wall parts 43, 44, 45, 46 can be reinforced by the weight 11, and the wall parts 43, 44, 45, 46 can be prevented from falling.

  The first magnetic element held by the holder 40 is a coil 53, and the metal member 80 is made of a nonmagnetic material. For this reason, since a magnetic attraction force is not generated between the metal member 80 and the magnet 52 on the fixed body 20 side, the movable body 10 can be appropriately swung.

  Further, a spring member 70 is connected to the holder 40 and the fixed body 20 on the side opposite to the wall portions 43, 44, 45, 46 of the frame portion 41 of the holder 40. For this reason, even when the weight 11 is provided at the tip portions 430, 440, 450, and 460 on the side opposite to the frame portion 41 of the walls 43, 44, 45, and 46, the spring member 70 that regulates the posture of the movable body 10. Can be provided.

(Modification of metal member 80)
FIG. 8 is an explanatory view showing a modification of the holder 40 of the optical unit 100 to which the present invention is applied. FIG. 8 (a) is an explanatory view of the first modification, and FIG. 8 (b) is a second modification. Explanatory drawing and FIG.8 (c) are explanatory drawings of a 3rd modification. 8A and 8C are XZ cross-sectional views when cut at a position passing through the wall portion 45. FIG.

  In the form described with reference to FIG. 4 and the like, the connecting portion 88 of the metal member 80 is located inside the resin portion 49 in the portion constituting the wall portions 43, 44, 45, 46, but FIG. As shown to a), the form which the edge part 81 by the side of the frame part 41 of the metal member 80 is located inside the part which comprises the frame part 41 among the resin parts 49 may be employ | adopted. According to such a configuration, problems such as breakage of the wall portions 43, 44, 45, and 46 are unlikely to occur.

  In the embodiment described with reference to FIG. 4 and the like, the metal member 80 is provided independently for each of the wall portions 43, 44, 45, and 46. However, as shown in FIG. 8B, the metal member 80 is provided. Includes a frame-shaped connecting portion 89 extending along the frame portion 41, and any of the first support column 86 and the second support column 87 provided in each of the plurality of wall portions 43, 44, 45, 46. Alternatively, a structure that protrudes from the connecting portion 89 along the optical axis L may be employed. According to this configuration, since the strength of the entire metal member 80 can be increased, the reinforcing effect of the metal member 80 on the walls 43, 44, 45, 46 can be increased.

  In this case, a configuration in which the connecting portion 89 is interrupted at one place is adopted. Therefore, the pattern shown in FIG. 8B can be realized by patterning a single metal plate into a predetermined shape and then bending it.

  In this embodiment, as described with reference to FIGS. 1, 6, and 7, the movable frame 39, and the first swings at the two positions spaced apart in the first axis R <b> 1 direction between the movable frame 39 and the fixed body 20. A movable fulcrum (first oscillating support part 36) and two second oscillating fulcrum (second oscillating support part 37) spaced apart in the second axis R2 direction between the movable frame 39 and the holder 40 are provided. The support mechanism 30 (gimbal mechanism) is configured. Therefore, for example, as shown by a dotted line in FIG. 8B, a fulcrum reinforcing portion 82 that reinforces the second oscillating fulcrum (second oscillating support portion 37) is provided at the corner of the connecting portion 89 of the metal member 80. May be.

  In at least one of the wall portions 43, 44, 45, and 46 described with reference to FIG. 4 and the like, an opening 490 is formed as shown in FIG. 8C, and the opening 490 is used as an optical path of the photo reflector. May be used. For example, in the wall portion 45 of the resin portion 49, a slit-like opening extending from the front end portion 450 of the wall portion 45 toward the frame portion 41 between the first support post portion 86 and the second support post portion 87. A part 490 may be provided. In this case, in the sensor substrate 90 provided along the inner surface of the wall portion 45, a photo reflector 91 is provided in a portion exposed toward the fixed body (not shown) through the opening 490, and the movable body 10 is shaken. The degree of motion may be detected. In this case, when the opening 490 is formed in one of the walls 43 and 44 and the opening 490 is used as an optical path of the photo reflector, the degree of swing of the movable body 10 in two directions can be detected.

(Other variations)
In the above embodiment, the coil 53 is held by the holder 40 and the magnet 52 is held by the fixed body 20 (the trunk portion 211 of the case 210). However, the magnet 52 is fixed to the holder 40 as the first magnetic element. A configuration in which the coil 53 is fixed to the fixed body 20 (the trunk portion 211 of the case 210) as the second magnetic element may be employed.

  In the above embodiment, the metal member 80 is insert-molded to configure the holder 40, but the metal member 80 may be fixed to a slit or the like of the resin portion 49 to configure the holder 40.

  In the above embodiment, in the holder 40, the wall portions 43, 44, 45, 46 protrude from the frame portion 41 toward the subject side, but the wall portions 43, 44 extend from the frame portion 41 toward the opposite side of the subject side. , 45 and 46 may be employed.

1 .... Optical module, 10 .... Movable body, 11 .... Weight, 12 .... Notch, 13 .... Opening, 14 .... Step, 19 .... Stopper mechanism, 20 .... Fixed body, ... Cover 30.. Support mechanism 36.. First swing support portion (first swing fulcrum) 37.. Second swing support portion (second swing fulcrum) 39.. Movable frame 40. · Holder, 42 ·· Holding hole, 43, 44, 45, 46 ·· Wall portion, 47 · · Coil holding portion, 49 · · Resin portion, 50 · · Drive mechanism for shake correction, 51 · · Magnetic drive mechanism, 52 .. Magnet (second magnetic element), 53.. Coil (first magnetic element), 70.. Spring member, 80.. Metal member, 81. Support point reinforcement part, 86 .. First support part, 87 .. Second support part, 88 .. Connecting part, 90 .. Sensor substrate, 91. Rector, 100 ... Optical unit, 210 ... Case, 250 ... Base, 292 ... Stopper convex part, 430, 440, 450, 460 ... Wall end, 490 ... Open, 861, 871 ..Convex part (exposed part), L..optical axis, R1 ..first axis, R2 ..second axis

Claims (8)

A movable body holding an optical module with a holder;
A fixed body that swingably supports the movable body;
A plurality of first magnetic elements comprising one of a magnet and a coil and held by the holder;
A second magnetic element comprising the other of a magnet and a coil and held by the fixed body;
Have
The holder includes a frame portion that holds the optical module inside, and a plurality of wall portions that protrude from the frame portion along an optical axis and hold the plurality of first magnetic elements, respectively.
The optical unit with a shake correction function, wherein the movable body includes a metal weight connected to a tip portion of the wall portion.   2. The shake correction function according to claim 1, wherein the weight is a cylindrical or frame-shaped member surrounding the optical axis, and is connected to each of the tip end portions of the plurality of wall portions. Optical unit.   3. The shake correction function according to claim 2, wherein the weight is formed with a step portion in which the tip portions of the plurality of wall portions abut from an optical axis direction and a direction orthogonal to the optical axis. Optical unit. Protruding portions protruding along the optical axis are provided at the tip portions of the plurality of wall portions,
4. The optical unit with a shake correction function according to claim 2, wherein a cutout into which the convex portion is fitted is provided on an outer peripheral surface of the weight. The convex portion is made of metal,
The optical unit with a shake correction function according to claim 4, wherein the weight is connected to the convex portion by welding. The fixed body includes a cover facing the weight in the optical axis direction,
The said cover is provided with the convex part for stoppers which protrudes inward in the radial direction of the said weight, and controls the rocking | fluctuation range of the said movable body, The any one of Claim 2-5 characterized by the above-mentioned. Optical unit with shake correction function.   A stopper mechanism is provided between the plurality of wall portions and the fixed body so as to abut against the holder when the holder is displaced in a direction perpendicular to the optical axis to regulate a movable range of the holder. An optical unit with a shake correction function according to any one of claims 1 to 6.   The spring member for restricting the posture of the movable body is connected to the holder and the fixed body on the opposite side of the frame portion from the wall portion. An optical unit with a shake correction function according to claim 1.

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