JP7453099B2 - Optical unit with shake correction function - Google Patents

Description

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

Some optical units installed on mobile terminals and moving objects move the movable object on which the camera module is mounted around the optical axis, in order to suppress disturbances in captured images when the mobile terminal or moving object moves. There is one that rotates around a first axis that is orthogonal to the optical axis and around a second axis that is orthogonal to the optical axis and the first axis. Patent Document 1 describes this type of optical unit with a shake correction function.

The optical unit with a shake correction function of Patent Document 1 includes a movable body including a camera module, a fixed body, and a swing support mechanism that rotatably supports the movable body with respect to the fixed body around an axis intersecting an optical axis. have A flexible printed circuit board connected to the camera module is pulled out from the movable body. Further, a coil of a shake correction drive mechanism is arranged on the movable body, and a flexible printed circuit board for feeding power to the coil is connected.

Patent Document 2 describes an optical unit with a shake correction function in which a coil of a drive mechanism for shake correction is arranged in a fixed body and a magnet is arranged in a movable body. A flexible printed circuit board for feeding power to the coil is bent and routed along the inner surface of a case (upper cover) surrounding the movable body, and is fixed to the case by surface bonding. The coil is fixed to the inner surface of the case via a flexible printed circuit board.

Japanese Patent Application Publication No. 2018-169499 Japanese Patent Application Publication No. 2014-235383

When electrically connecting a coil to a land on a flexible printed circuit board, the coil wire at the start of winding is pulled out from the inner circumference of the coil, is pulled out to the outer circumference of the coil through a path that overlaps the coil, and is then pulled to the land. It is passed around. Therefore, the coil wire is sandwiched between the coil installation surface of the flexible printed circuit board and the coil, so the coil is lifted from the coil installation surface by the thickness of the coil wire, making the fixed position of the coil stable. do not. When the positional accuracy of the coil is low, there is a problem that the magnetic circuit characteristics vary.

In view of these points, an object of the present invention is to reduce floating of the coil with respect to the coil installation surface of the flexible printed circuit board.

In order to solve the above problems, an optical unit with a shake correction function of the present invention includes a movable body including a camera module, and a movable body that supports the movable body rotatably around a first axis intersecting the optical axis of the camera module. and a swinging support mechanism that supports the movable body rotatably around a second axis that intersects the optical axis and intersects the first axis; and a fixed body that supports the movable body via the swinging support mechanism. A shake correction magnetic drive mechanism including a coil disposed on one of the fixed body and the movable body and a magnet disposed on the other of the fixed body and the movable body, and a flexible print including a coil fixing part. The coil fixing part has a coil installation surface on which a coverlay film is arranged on a surface of a flexible base material, and a coil installation surface on which a coverlay film is arranged on a surface of the flexible base material. and a recessed portion without the coil, and a coil wire drawn out from the coil is accommodated in a gap between the coil and the recessed portion.

According to the present invention, the coil fixing portion of the flexible printed circuit board has a coil installation surface where the coverlay film is placed on the surface of the flexible base material, and a coil installation surface where the coverlay film is placed on the surface of the flexible base material. It has no concave shaped part. The recessed part is recessed by the thickness of the coverlay film than the coil installation surface, so by storing the coil wire drawn out from the coil in the gap between the coil and the recessed part, the coil from the coil installation surface can be removed. It is possible to reduce floating. Therefore, the positional accuracy of the coil can be improved, and variations in the gap between the magnet and the coil can be reduced. Therefore, the magnetic circuit characteristics of the shake correction magnetic drive mechanism can be stabilized.

In the present invention, the coil wire is a winding start side coil wire that extends along the surface of the coil from the inner circumferential side to the outer circumferential side of the coil. Since the coil wire on the winding start side needs to be pulled out from the inner periphery of the coil, it gets caught between the coil and the coil installation surface, causing the coil to float. In this embodiment, since the winding start side coil wire can be accommodated in the concave portion, lifting of the coil from the coil installation surface can be reduced.

In the present invention, the winding end side coil wire drawn out from the coil is provided, and the concave portion includes a first concave portion where a land connected to the winding start side coil wire is arranged, and a winding end side coil wire drawn out from the coil. and a second concave portion in which a land connected to the line is arranged. This makes it easy to connect the winding start side coil wire to the land. Further, it is easy to connect the land to the wiring pattern formed on the surface of the flexible base material.

In the present invention, it is preferable that the first concave portion continuously expands from an edge of the coil fixing portion to a position overlapping the coil. In this way, the entire excess portion of the winding start side coil wire that is routed from the inner peripheral portion of the coil to the land can be accommodated in the concave portion. Furthermore, since a land can be formed on the edge of the coil fixing portion, it is easy to solder the coil wire to the land.

In the present invention, it is preferable that the second concave portion is arranged on an edge of the coil fixing portion in line with the first concave portion. In this way, the coil wire at the start of winding and the coil wire at the end of winding can be soldered from the same direction, making it easy to connect the flexible printed circuit board and the coil.

In the present invention, the coil includes a first coil and a second coil, the magnet includes a first magnet facing the first coil, and a second magnet facing the second coil, and the coil The fixing part includes a first coil fixing part to which the first coil is fixed, and a second coil fixing part to which the second coil is fixed, and the first coil fixing part and the second coil fixing part are , each preferably comprising the first concave portion and the second concave portion. In this way, it is possible to reduce the floating of the first coil from the coil installation surface of the first coil fixing part, and it is also possible to reduce the floating of the second coil from the coil installation surface of the second coil fixing part. Therefore, since the positional accuracy of the plurality of coils can be improved, the magnetic circuit characteristics of the shake correction magnetic drive mechanism can be stabilized.

In the present invention, the fixed body includes a case surrounding the outer peripheral side of the movable body, the first coil fixing part and the second coil fixing part extend in the circumferential direction along the case, and the first coil fixing part and the second coil fixing part extend in the circumferential direction along the case, and The first concave portion and the second concave portion are arranged circumferentially at edges of the first coil fixing portion and the second coil fixing portion in the optical axis direction, respectively. In this way, the two sets of winding start side coil wires and winding end side coil wires drawn out from the first coil and the second coil can all be soldered from the same direction. Therefore, the work of connecting the flexible printed circuit board and the coil is easy.

The present invention includes a rotation support mechanism that rotatably supports the movable body around the optical axis, and a rolling correction magnetic drive mechanism that rotates the movable body around the optical axis, and the rolling correction magnetic drive mechanism that rotates the movable body around the optical axis. The mechanism includes a third coil and a third magnet facing the third coil, the flexible printed circuit board includes a third coil fixing part to which the third coil is fixed, the first coil fixing part, and the third coil fixing part. The second coil fixing part and the third coil fixing part extend in the circumferential direction along the case, and the second coil fixing part and the third coil fixing part are arranged in the first coil fixing part, the second coil fixing part, and the third coil fixing part. The first concave portion and the second concave portion are arranged side by side in the circumferential direction at each edge in the optical axis direction. As described above, the present invention can be applied to an optical unit with a shake correction function that performs shake correction in three directions including shake correction around the optical axis. When performing shake correction in three directions, the number of coils is greater than when performing shake correction in two directions, but according to the present invention, it is possible to reduce the amount of floating of all coils from the coil installation surface. Therefore, the magnetic circuit characteristics of the shake correction magnetic drive mechanism and the rolling correction magnetic drive mechanism can be stabilized.

According to the present invention, the coil fixing portion of the flexible printed circuit board has a coil installation surface where the coverlay film is placed on the surface of the flexible base material, and a coil installation surface where the coverlay film is placed on the surface of the flexible base material. It has no concave shaped part. The recessed part is recessed by the thickness of the coverlay film than the coil installation surface, so by storing the coil wire drawn out from the coil in the gap between the coil and the recessed part, the coil from the coil installation surface can be removed. It is possible to reduce floating. Therefore, the positional accuracy of the coil can be improved, and variations in the gap between the magnet and the coil can be reduced. Therefore, the magnetic circuit characteristics of the shake correction magnetic drive mechanism can be stabilized.

FIG. 2 is a perspective view of an optical unit with a correction function to which the present invention is applied. FIG. 2 is an exploded perspective view of the optical unit with a shake correction function shown in FIG. 1, viewed from one side in the optical axis direction. FIG. 2 is an exploded perspective view of the optical unit with a shake correction function shown in FIG. 1, viewed from the other side in the optical axis direction. FIG. 3 is a cross-sectional view of the optical unit with a shake correction function taken along an XZ plane. FIG. 3 is a cross-sectional view of the optical unit with a shake correction function taken along an XY plane. FIG. 2 is a cross-sectional view of the optical unit with a shake correction function taken along a plane including a first axis and a Z axis. FIG. 3 is a cross-sectional view of the optical unit with a shake correction function taken along a plane including the second axis and the Z axis. FIG. 3 is a perspective view of a gimbal spring. FIG. 3 is a plan view showing the main parts of an optical unit with a shake correction function. It is a perspective view of a stopper case, a flexible printed circuit board, and a coil seen from the other side in the optical axis direction. FIG. 2 is a perspective view showing a state in which a flexible printed circuit board and a coil are fixed to a stopper case. FIG. 12 is a cross-sectional view of the stopper case and the flexible printed circuit board (cross-sectional view taken along the lines AA and BB in FIG. 11). It is a top view of a 1st coil fixing part, a 2nd coil fixing part, and a 3rd coil fixing part. FIG. 13 is a cross-sectional view of the first concave portion (a cross-sectional view taken along the line CC in FIG. 13(a)).

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment 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.

(overall structure)
FIG. 1 is a perspective view of an optical unit 1 with a shake correction function to which the present invention is applied. FIG. 2 is an exploded perspective view of the optical unit 1 with shake correction function shown in FIG. 1 viewed from one side (+Z direction) in the optical axis direction. FIG. 3 is an exploded perspective view of the optical unit 1 with a shake correction function shown in FIG. 1, viewed from the other side (-Z direction) in the optical axis direction. FIG. 4 is a cross-sectional view of the optical unit 1 with a shake correction function taken along the XZ plane. FIG. 5 is a cross-sectional view of the optical unit 1 with shake correction function taken along the XY plane. FIG. 6 is a cross-sectional view of the optical unit 1 with shake correction function taken along a plane including the first axis R1 and the Z axis. FIG. 7 is a cross-sectional view of the optical unit 1 with shake correction function taken along a plane including the second axis R2 and the Z axis. FIG. 8 is a perspective view of the gimbal spring 70. FIG. 9 is a plan view showing the main parts of the optical unit 1 with a shake correction function.

The optical unit 1 with a shake correction function includes a camera module 4 including a lens 2 and an image sensor 3. The optical unit 1 with a shake correction function is used, for example, in optical devices such as camera-equipped mobile phones and drive recorders, and in optical devices such as action cameras and wearable cameras mounted on moving objects such as helmets, bicycles, and radio-controlled helicopters. . In such an optical device, if the optical device shakes during photographing, disturbances occur in the captured image. The optical unit 1 with a shake correction function corrects the tilt of the camera module 4 based on the acceleration, angular velocity, shake amount, etc. detected by a detection means such as a gyroscope in order to avoid tilting of the captured image.

The optical unit 1 with shake correction function rotates the camera module 4 around the optical axis L, around the first axis R1 that is orthogonal to the optical axis L, and around the second axis R2 that is orthogonal to the optical axis L and the first axis R1. to perform shake correction. Therefore, the optical unit 1 with shake correction function performs rolling correction, pitching correction, and yawing correction.

In the following description, three mutually orthogonal axes are referred to as the X axis, Y axis, and Z axis. The Z axis coincides with the optical axis L of the lens 2. The X-axis is perpendicular to the optical axis L and passes through the intersection of the first axis R1 and the second axis R2. Further, the X axis intersects the first axis R1 and the second axis R2 at an angle of 45°. The Y-axis is perpendicular to the optical axis L and the X-axis, and passes through the intersection of the first axis R1 and the second axis R2. Further, the Y axis intersects the first axis R1 and the second axis R2 at an angle of 45°. Therefore, when a plane including the X-axis and the Y-axis is defined as an XY plane, the first axis R1 and the second axis R2 are located on the XY plane. The first axis R1 and the second axis R2 are inclined at 45 degrees with respect to the X axis and the Y axis around the Z axis.

In the following description, directions along the X-axis, Y-axis, and Z-axis are referred to as the X-axis direction, Y-axis direction, and Z-axis direction. One side in the X-axis direction is the −X direction, and the other side is the +X direction. Also, one side in the Y-axis direction is the -Y direction, the other side is the +Y direction, and one side in the Z-axis direction is the -Z direction, and the other side is the +Z direction. The −Z direction is the opposite side of the camera module 4 to the subject and the other side in the optical axis direction. The +Z direction is the subject side of the camera module 4, and is one side in the optical axis direction. Further, the direction along the first axis R1 is the first axis R1 direction, and the direction along the second axis R2 is the second axis R2 direction.

As shown in FIGS. 1 and 2, the optical unit 1 with a shake correction function includes a movable body 5 including a camera module 4, and a rotation support mechanism 6 that supports the movable body 5 rotatably around an optical axis L. Therefore, the movable body 5 is rotatable around the optical axis L in the roll direction ROLL. The optical unit 1 with a shake correction function also includes a gimbal mechanism 7 that rotatably supports the rotation support mechanism 6 around a first axis R1 and a gimbal mechanism 7 that rotatably supports the rotation support mechanism 6 around a second axis R2. It has a fixed body 8 that supports the movable body 5 via a rotation support mechanism 6.

Therefore, the movable body 5 is supported via the gimbal mechanism 7 so as to be swingable around the first axis R1, and is also supported so as to be swingable around the second axis R2. Here, the movable body 5 is rotatable in the yaw direction YAW around the X axis and the pitch direction PITCH around the Y axis by combining the rotation around the first axis R1 and the rotation around the second axis R2. . Therefore, the gimbal mechanism 7 is a swing support mechanism that supports the movable body 5 so as to be swingable around the X-axis and the Y-axis via the rotation support mechanism 6.

The optical unit 1 with a shake correction function includes a flexible printed circuit board 14 connected to the movable body 5. As shown in FIGS. 4 and 5, the flexible printed circuit board 14 is pulled out from the movable body 5 in the +X direction. The flexible printed circuit board 14 is pulled out from the fixed body 8 and connected to a board of an optical device on which the optical unit 1 with a shake correction function is mounted via a connector (not shown).

Further, as shown in FIG. 5, the optical unit 1 with a shake correction function includes a shake correction magnetic drive mechanism 10 that rotates the movable body 5 around a first axis R1 and a second axis R2. The shake correction magnetic drive mechanism 10 includes a first shake correction magnetic drive mechanism 11 that generates a driving force around the X-axis on the movable body 5, and a first shake correction magnetic drive mechanism 11 that generates a drive force around the Y-axis on the movable body 5. A second shake correction magnetic drive mechanism 12 is provided. As shown in FIGS. 2, 3, and 5, the first shake correction magnetic drive mechanism 11 includes a first magnet 111 and a first coil 112 arranged in the -Y direction of the movable body 5. The second shake correction magnetic drive mechanism 12 includes a second magnet 121 and a second coil 122 arranged in the -X direction of the movable body 5.

Furthermore, the optical unit 1 with a shake correction function includes a rolling correction magnetic drive mechanism 13 that rotates the movable body 5 around the optical axis L, as shown in FIGS. 2, 3, and 5. The rolling correction magnetic drive mechanism 13 includes a rolling correction magnet 131 and a rolling correction coil 132 arranged in the +Y direction of the movable body 5. The optical unit 1 with a shake correction function includes a flexible printed circuit board 15 for power supply to the shake correction magnetic drive mechanism 10 and the rolling correction magnetic drive mechanism 13. The flexible printed circuit board 15 is attached to the fixed body 8.

(movable body)
As shown in FIGS. 2 to 5, the movable body 5 includes a camera module 4 and a metal holder 16 surrounding the camera module 4. The camera module 4 includes an octagonal camera module body 4a when viewed from the Z-axis direction, and a cylindrical lens barrel portion 4b that protrudes from the camera module body 4a in the +Z direction. The lens 2 (see FIG. 4) is held in the lens barrel portion 4b. The holder 16 includes a holder bottom 161 that supports the camera module 4 from the -Z direction, and a holder frame 162 that rises from the outer periphery of the holder bottom 161 in the +Z direction. The holder frame portion 162 includes a notch portion 160 that opens in the +X direction. The flexible printed circuit board 14 is connected to the image sensor 3 disposed inside the camera module 4, and is pulled out in the +X direction of the movable body 5 through the notch 160.

The holder 16 is made of magnetic material. As shown in FIGS. 3 and 5, the first magnet 111 is fixed to the side surface of the holder frame 162 in the -Y direction. The second magnet 121 is fixed to the side surface of the holder frame 162 in the -X direction. The first magnet 111 and the second magnet 121 are polarized and magnetized in the Z-axis direction. Furthermore, a rolling correction magnet 131 is fixed to the side surface of the holder frame 162 in the +Y direction. The rolling correction magnet 131 is polarized and magnetized in the circumferential direction.

(fixed body)
As shown in FIGS. 1 to 5, the fixed body 8 includes a cover bottom 20 that covers the movable body 5 and the flexible printed circuit board 14 from the -Z direction, and a cover bottom 20 that is fixed to the cover bottom 20 from the +Z direction and extends in the diagonal direction of the movable body 5. , and a stopper case 40 that surrounds the frame case 30 and the outer peripheral side of the movable body 5. The cover bottom 20, the frame case 30, and the stopper case 40 are made of metal and nonmagnetic material. The cover bottom 20 is, for example, a sheet metal member having a thickness of 0.15 mm, and is manufactured by press working. The frame case 30 is a sheet metal member that is thicker than the cover bottom 20 (for example, 0.30 mm thick), and is manufactured by press working. The stopper case 40 has the same thickness as the cover bottom 20 and is manufactured by press drawing. As shown in FIGS. 1 and 4, a portion of the movable body 5 and the gimbal mechanism 7 protrude from the stopper case 40 in the +Z direction.

Furthermore, the fixed body 8 includes an FPC cover 50 that surrounds the outer peripheral side of the flexible printed circuit board 14 that is pulled out from the movable body 5 in the +X direction. The FPC cover 50 is made of resin and is fixed to the cover bottom 20 from the +Z direction. The cover bottom 20 includes two first elastic engagement portions 21 rising from the edge in the +X direction in the +Z direction, and the first elastic engagement portions 21 are provided on the side surface of the FPC cover 50 in the +X direction. It is locked by the first locking part 22 . The FPC cover 50 includes a notch 51 that is cut out at the end in the −Z direction of the side surface in the +X direction. The flexible printed circuit board 14 is drawn out from the fixed body 8 through the gap between the notch 51 and the cover bottom 20.

The end of the FPC cover 50 in the −X direction includes a hook portion 52 that fits into a rectangular frame portion 31 of a frame case 30, which will be described later (see FIGS. 3 and 5). By fitting the hook portion 52 into the rectangular frame portion 31 from the +Z direction, the end portion of the FPC cover 50 in the −X direction is locked to the frame case 30. Furthermore, locking portions 53 are formed on the side faces in the -Y direction and the side faces in the +Y direction at the ends in the -X direction of the FPC cover 50, respectively. The end of the stopper case 40 in the +X direction is provided with an engagement hole 49 that engages with the locking portion 53. Further, the side surface of the stopper case 40 in the -X direction is provided with engagement holes 27 that engage with the third elastic engagement portions 26 at two locations rising from the edge of the cover bottom 20 in the -X direction in the +Z direction (Fig. (See 3).

As shown in FIG. 5, the flexible printed circuit board 15 is circumferentially routed along the inner surface of the stopper case 40. As shown in FIG. As shown in FIG. 2, FIG. 3, and FIG. A second coil fixing part 152 extends in the Y-axis direction along the side surface of the stopper case 40, and a third coil fixing part 153 extends in the X-axis direction along the +Y-direction side surface of the stopper case 40. The first coil fixing part 151, the second coil fixing part 152, and the third coil fixing part 153 are fixed to the inner peripheral surface of the stopper case 40.

The first coil 112 of the first shake correction magnetic drive mechanism 11 is fixed to the first coil fixing part 151, and the second coil 122 of the second shake correction magnetic drive mechanism 12 is fixed to the second coil fixing part 152. is fixed. Further, the rolling correction coil 132 is fixed to the third coil fixing part 153. The first coil 112, the second coil 122, and the rolling correction coil 132 are electrically connected to the flexible printed circuit board 15. Further, the first coil 112, the second coil 122, and the rolling correction coil 132 are fixed to the stopper case 40 via the flexible printed circuit board 15.

As shown in FIGS. 2, 3, and 5, the stopper case 40 includes a body portion 40A that surrounds the outer peripheral side of the movable body 5. As shown in FIGS. The body portion 40A includes a first case wall 41 extending in the X-axis direction in the -Y direction of the movable body 5, a second case wall 42 extending in the Y-axis direction in the -X direction of the movable body 5, and a +Y axis of the movable body 5. A third case wall 43 is provided that extends in the X-axis direction. Further, the stopper case 40 includes an end plate portion 44 that extends toward the inner circumferential side from the end portion of the body portion 40A on one side in the optical axis direction (+Z direction). The end plate portion 44 includes a first case protrusion 45A that protrudes inward from a diagonal position in the first axis R1 direction, and a second case protrusion 45B that protrudes inward from a diagonal position in the second axis R2 direction. Equipped with Furthermore, the end plate portion 44 is provided with case positioning holes 440 for positioning with the frame case 30 at two locations on the first axis R1 and at two locations on the second axis R2. .

The first case wall 41, the second case wall 42, and the third case wall 43 each include a magnetic member arrangement groove 48 extending in the Z-axis direction at the center in the circumferential direction. The magnetic member arrangement groove 48 is recessed toward the inner circumferential side. As shown in FIG. 5, the first magnetic member 113 is arranged in the magnetic member arrangement groove 48 provided in the first case wall 41. As shown in FIG. The first magnetic member 113 constitutes a magnetic spring for positioning the movable body 5 at the origin position for shake correction around the X axis. Further, the second magnetic member 123 is arranged in the magnetic member arrangement groove 48 provided in the second case wall 42 . The second magnetic member 123 constitutes a magnetic spring for positioning the movable body 5 at the origin position for shake correction around the Y-axis.

As shown in FIGS. 2 and 3, the frame case 30 includes a rectangular frame portion 31 that contacts the cover bottom 20 from the +Z direction, and a pair of rectangular frame portions 31 that rise in the +Z direction from a diagonal position in the first axis R1 direction. , and a pair of second vertical frame portions 33 rising from a diagonal position in the second axis R2 direction of the rectangular frame portion 31 in the +Z direction. The first vertical frame portion 32 and the second vertical frame portion 33 have second elastic engagements at four locations provided at diagonal positions in the first axis R1 direction of the cover bottom 20 and diagonal positions in the second axis R2 direction. A second locking portion 24 that locks the joint portion 23 is provided. By locking the second elastic engagement portion 23 to the second locking portion 24, the frame case 30 is fixed to the cover bottom 20.

As shown in FIGS. 2 and 3, each of the pair of first vertical frame portions 32 includes a plate portion 34 extending in the +Z direction and two protrusions 35 protruding from both edges of the plate portion 34 in the width direction. Equipped with The pair of second vertical frame portions 33 each include a plate portion 36 extending in the +Z direction, and a pair of arm portions 37 protruding from approximately the center in the Z-axis direction of both edges of the plate portion 36 in the width direction. Each arm portion 37 has four protrusions 38 that protrude from both widthwise edges of the plate portion 36 in the +Z direction and the −Z direction. The protrusions 35 and 38 extend in the Y-axis direction or the X-axis direction along the flexible printed circuit board 15 fixed to the inner surface of the stopper case 40.

As shown in FIGS. 1 and 6 , in each of the pair of first vertical frame portions 32 , the tips of the plate portions 34 in the +Z direction are inserted into the case positioning holes 440 of the stopper case 40 . Further, as shown in FIGS. 1 and 7, in each of the pair of second vertical frame portions 33, the tips of the plate portions 36 in the +Z direction are inserted into the case positioning holes 440 of the stopper case 40. In this embodiment, the tips of the plate parts 34 and 36 are fixed to the stopper case 40 by welding.

The pair of second vertical frame portions 33 include second shaft-side cylinder portions 39 that protrude from the plate portion 36 in opposite directions in the second axis R2 direction. The pair of arm portions 37 are arranged on both sides of the second shaft side cylinder portion 39 in the circumferential direction. A cylindrical second shaft 720 is held in the second shaft cylindrical portion 39 . The second shaft side shaft 720 has a hemispherical end portion that projects radially inward from the second shaft side cylinder portion 39 . The second shaft 720 constitutes a second connection mechanism 72 of the gimbal mechanism 7, as described later.

(Rotation support mechanism)
As shown in FIGS. 4, 6, and 7, the rotation support mechanism 6 includes a shaft portion 61 protruding from the center of the holder bottom portion 161 in the −Z direction, a bearing 62 surrounding the outer peripheral side of the shaft portion 61, and a bearing 62. The plate holder 63 is connected to the shaft portion 61 via the plate holder 63, and the annular attraction magnet 64 is fixed to the plate holder 63. The attraction magnet 64 may be single-pole magnetized or may be multi-pole magnetized with S poles and N poles arranged alternately in the circumferential direction. The shaft portion 61 is formed on the holder 16 by burring. The bearing 62 includes an inner ring 621 fixed to a step 610 provided on the outer peripheral surface of the shaft portion 61, an outer ring 622 surrounding the outer peripheral side of the inner ring 621, and a sphere 623 rolling between the inner ring 621 and the outer ring 622. , an annular retainer 624 that rotatably holds the sphere 623.

The plate holder 63 includes a plate holder cylindrical portion 65 to which an outer ring 622 is fixed to an inner circumferential surface, a plate holder annular portion 66 extending from an end in the +Z direction of the plate holder cylindrical portion 65 toward the outer circumferential side, and a plate holder annular portion 66. A pair of plate holder extension portions 67 are provided that protrude from the plate holder to both sides in the first axis R1 direction and are bent in the +Z direction. The attraction magnet 64 is fixed to the plate holder annular portion 66 and attracts the holder bottom portion 161, which is a magnetic member. A constant gap is provided between the plate holder annular portion 66 and the holder bottom 161, and a constant gap is maintained between the attraction magnet 64 and the holder bottom 161.

As shown in FIG. 6, the distal end portions of the pair of plate holder extension portions 67 each extend on the outer peripheral side of the movable body 5 in the Z-axis direction. The distal end portion of each plate holder extension portion 67 includes a first axis side concave curved surface 68 that is concave toward the inner circumferential side on the first axis R1. The first axis side concave curved surface 68 constitutes a first connection mechanism 71 of the gimbal mechanism 7, as described later.

(Elastic support member)
As shown in FIG. 2, the cover bottom 20 includes a circular hole 25 centered on the optical axis L. As shown in FIG. Cylindrical elastic support members 9 are arranged at two locations facing each other in the first axis R1 direction with the circular hole 25 in between. The elastic support member 9 is made of low hardness rubber having a rubber hardness of 10 or less. For example, the elastic support member 9 is made of silicone rubber having a rubber hardness of 1 to 3. In this embodiment, the elastic support member 9 receives the load of the movable body 5 and the rotation support mechanism 6 via the plate holder 63 of the rotation support mechanism 6 disposed at the bottom of the movable body 5 (Fig. reference). The elastic support member 9 is compressed in the Z-axis direction between the plate holder 63 and the cover bottom 20 at a compression rate of about 10% due to the loads of the movable body 5 and the rotation support mechanism 6. The elastic support member 9 is fixed to the cover bottom 20 but not to the plate holder 63.

The elastic support members 9 are arranged symmetrically across the optical axis L and are fixed to the cover bottom 20. In this embodiment, since the center of gravity of the movable body 5 is located on the optical axis, the elastic support members 9 are arranged symmetrically with respect to the center of gravity of the movable body 5. Therefore, by receiving the loads of the movable body 5 and the rotation support mechanism 6 by the elastic support member 9, the positional accuracy when positioning the movable body 5 at the origin position for shake correction can be improved. Furthermore, since low hardness rubber is a vibration-proofing material, it can improve impact resistance when an impact is applied, such as by a fall.

The shape of the elastic support member 9 is not limited to a cylindrical shape, and other shapes can also be adopted. For example, a convex shape protruding in the +Z direction, such as a hemispherical shape, can be adopted.

(Gimbal mechanism)
As shown in FIGS. 2 to 5, the gimbal mechanism 7 includes a gimbal spring 70, a first connection mechanism 71, and a second connection mechanism 72. The first connection mechanism 71 rotatably connects the gimbal spring 70 and the plate holder 63 about the first axis R1. The second connection mechanism 72 rotatably connects the gimbal spring 70 and the frame case 30 about the second axis R2. When the gimbal mechanism 7 is configured, the movable body 5 is supported by the fixed body 8 via the gimbal mechanism 7 and the rotation support mechanism 6. Thereby, the movable body 5 becomes swingable about the intersection point where the optical axis L, the first axis R1, and the second axis R2 intersect.

The gimbal spring 70 is made of a metal leaf spring. As shown in FIGS. 2, 3, 8, and 9, the gimbal spring 70 is connected to a gimbal spring frame 73 surrounding the outer peripheral side of the holder 16, and from a diagonal position of the gimbal spring frame 73 in the first axis R1 direction to -Z. A pair of first gimbal spring extending portions 74 extending in the direction, and a pair of second gimbal spring extending portions 75 extending in the −Z direction from a diagonal position in the second axis R2 direction of the gimbal spring frame portion 73 are provided.

As shown in FIG. 8, the gimbal spring frame portion 73 has a tapered portion 731 in which a diagonal portion in the direction of the first axis R1 and a diagonal portion in the direction of the second axis R2 are bent in a direction that is inclined in the −Z direction. Be prepared. Each tapered portion 731 includes a groove portion 732 that is cut out from the center portion in the circumferential direction toward the outer circumferential side. A first case protrusion 45A or a second case protrusion 45B provided on the stopper case 40 is arranged in each groove 732 (see FIG. 9).

The groove 732 of the gimbal spring 70 and the first case protrusion 45A and the second case protrusion 45B of the stopper case 40 constitute a stopper mechanism that restricts the swing range of the movable body 5. That is, the first case projection 45A hits the edge of the groove 732 in the -Z direction, thereby restricting the swing range of the movable body 5 around the second axis R2, and the second case projection 45B hits the edge of the groove 732 in the -Z direction. By hitting the edge, the swing range of the movable body 5 around the first axis R1 is restricted.

The gimbal spring frame portion 73 includes a gimbal spring relief portion 76 that avoids interference with the flexible printed circuit board 14 extending from the movable body 5 in the +X direction. As shown in FIGS. 1 and 8, the gimbal spring relief portion 76 includes a pair of protrusions 761 bent and extending in the +X direction from two tapered portions 731 spaced apart in the Y-axis direction; A pair of bent portions 762 are bent in the −Z direction from the tips and extend in the Z-axis direction, and a straight portion 763 is connected to the −Z-direction tips of the pair of bent portions 762 and extends linearly in the Y-axis direction. As shown in FIG. 1, the flexible printed circuit board 14 pulled out from the bottom of the movable body 5 passes between the pair of bending parts 762.

As shown in FIGS. 5 and 6, the distal end portions of the pair of first gimbal spring extension portions 74 include a first shaft side cylindrical portion 77 that protrudes toward the outer circumferential side on the first shaft R1. The first shaft side cylindrical portion 77 holds a cylindrical first shaft side shaft 710 . The first shaft side shaft 710 has a hemispherical end portion that projects radially inward from the first shaft side cylindrical portion 77 . The first connection mechanism 71 is configured by a hemispherical surface provided at the distal end of the first shaft 710 making point contact with the first concave curved surface 68 provided at the distal end of the plate holder extension portion 67. be done. Thereby, the rotation support mechanism 6 is rotatably supported by the gimbal mechanism 7 around the first axis R1.

As shown in FIGS. 5 and 8, the distal end portions of the pair of first gimbal spring extension portions 74 include a pair of arm portions 78 that protrude inward on both circumferential sides of the first shaft side cylinder portion 77. . When the first connection mechanism 71 is configured, the plate holder extension part 67 is arranged between the pair of arm parts 78. Further, the pair of plate holder extension portions 67 are bent toward the inner circumferential side and come into elastic contact with the first shaft side shaft 710 from the inner circumferential side.

As shown in FIGS. 5 and 7, the distal end portions of the pair of second gimbal spring extension portions 75 include a second axis side concave curved surface 79 that is concave toward the inner circumference on the second axis R2. The second connection mechanism 72 has a hemispherical surface provided at the distal end of the second shaft side shaft 720 held by the second shaft side cylindrical portion 39 of the frame case 30 , and a hemispherical surface provided at the distal end portion of the second gimbal spring extension portion 75 . It is configured by making point contact with the concave curved surface 79 on the second axis side. Thereby, the gimbal mechanism 7 is rotatably supported by the fixed body 8 around the second axis R2.

As shown in FIG. 5, when the second connection mechanism 72 is configured, the distal end portions of the pair of second gimbal spring extension portions 75 connect to the pair of arm portions provided on the second vertical frame portion 33 of the frame case 30. It is located between 37. The pair of arm portions 37 are drop-off prevention portions that restrict the second gimbal spring extension portion 75 from coming off from the second vertical frame portion 33 in the +Z direction. Further, the pair of second gimbal spring extension portions 75 are bent toward the inner circumference and come into elastic contact with the second shaft 720 from the inner circumference.

(Magnetic drive mechanism for shake correction and magnetic drive mechanism for rolling correction)
When the movable body 5 and the fixed body 8 are connected by the gimbal mechanism 7, the first magnet 111 fixed to the side surface of the movable body 5 in the -Y direction and the first coil 112 fixed to the stopper case 40 are connected to each other. A magnetic drive mechanism 11 for one shake correction is configured. Therefore, by supplying power to the first coil 112, the movable body 5 rotates around the X axis. Further, the second magnet 121 fixed to the side surface of the movable body 5 in the -X direction and the second coil 122 fixed to the stopper case 40 constitute the second shake correction magnetic drive mechanism 12. Therefore, by supplying power to the second coil 122, the movable body 5 rotates around the Y axis. The shake correction magnetic drive mechanism 10 rotates the movable body 5 around the X-axis by the first shake correction magnetic drive mechanism 11 and rotates the movable body 5 around the Y-axis by the second shake correction magnetic drive mechanism 12. , and rotate the movable body 5 around the first axis R1 and around the second axis R2.

Further, when the gimbal mechanism 7 is configured, the rolling correction magnet 131 fixed to the side surface of the movable body 5 in the +Y direction and the rolling correction coil 132 fixed to the stopper case 40 are connected to the rolling correction magnetic drive mechanism 13. Configure. Therefore, by supplying power to the rolling correction coil 132, the movable body 5 rotates around the optical axis L.

(Positioning structure of flexible printed circuit board)
FIG. 10(a) is a perspective view of the stopper case 40 viewed from the other side in the optical axis direction (-Z direction), and FIG. 10(b) is a perspective view of the stopper case 40 viewed from the other side in the optical axis direction. It is a perspective view seen from (-Z direction). FIG. 11 is a perspective view showing a state in which the flexible printed circuit board 15 and the coil are fixed to the stopper case 40. 12 is a sectional view of the stopper case 40 and the flexible printed circuit board 15, FIG. 12(a) is a sectional view taken along the line AA in FIG. FIG. 3 is a sectional view taken along the line BB.

In this embodiment, the stopper case 40 includes a positioning part that positions the flexible printed circuit board 15 in the optical axis direction and the circumferential direction, and the flexible printed circuit board 15 has a fitting part that fits into the positioning part of the stopper case 40. Be prepared. As described below, the positioning portions are hooks 46 and grooves 47 provided in the stopper case 40. Further, the fitting portion is a notch portion 155 provided on the edge of the flexible printed circuit board 15 in the −Z direction and a protrusion portion 156 provided on the edge of the flexible printed circuit board 15 in the +Z direction.

As shown in FIGS. 11 and 12(a), the stopper case 40 includes a hook 46 that locks the edge of the flexible printed circuit board 15 in the −Z direction. As shown in FIGS. 10A and 11, one hook 46 is formed at each of the circumferential centers of the first case wall 41, the second case wall 42, and the third case wall 43. The hook 46 is a protrusion that protrudes inward from the bottom of the magnetic member arrangement groove 48 provided at the circumferential center of the first case wall 41, the second case wall 42, and the third case wall 43, and serves as a stopper. It protrudes from the case 40 toward the inner circumference and is bent toward one side (+Z direction) in the optical axis direction. In this embodiment, the hook 46 is a cut and bent portion formed by cutting and raising the bottom of the magnetic member arrangement groove 48 toward the inner circumference. Therefore, an opening 46a is provided at the bottom of the magnetic member arrangement groove 48 at a position where the hook 46 is cut and raised, and the hook 46 is connected to the edge of the opening 46a in the −Z direction.

As shown in FIGS. 10(b) and 11, the flexible printed circuit board 15 includes a notch 155 that fits into the hook 46. One notch 155 is formed approximately at the center of each edge of the first coil fixing part 151, second coil fixing part 152, and third coil fixing part 153 in the -Z direction. ing. By fitting each notch 155 with the hook 46, the -Z direction end of the flexible printed circuit board 15 is positioned in the circumferential direction. That is, the first coil fixing part 151 is positioned with respect to the first case wall 41 in the X-axis direction. Further, the second coil fixing part 152 is positioned in the Y-axis direction with respect to the second case wall 42, and the third coil fixing part 153 is positioned in the X-axis direction with respect to the third case wall 43.

As shown in FIG. 12(a), the edge of the notch 155 fits between the tip of the hook 46 and the second case wall 142. As shown in FIG. Therefore, the edge of the second coil fixing part 152 in the -Z direction is locked by the tip of the hook 46. Similarly, the edges of the first coil fixing part 151 and the third coil fixing part 153 in the -Z direction are locked by the tip of the hook 46. As a result, the flexible printed circuit board 15 is positioned in the radial direction, so that the flexible printed circuit board 15 is prevented from coming off from the stopper case 40 toward the inner circumference.

As shown in FIGS. 10A and 11, the stopper case 40 includes a groove 47 that locks the edge of the flexible printed circuit board 15 in the +Z direction. As shown in FIGS. 10A and 11, the groove 47 is provided on the outer peripheral edge of the end plate portion 44 and is recessed in the +Z direction. In this embodiment, the depth of the groove 47 is approximately 50 μm, and is formed by press working. The grooves 47 extend along the inner peripheral surfaces of the first case wall 41 , the second case wall 42 , and the third case wall 43 , and have two grooves on both sides of the three magnetic member arrangement grooves 48 in the circumferential direction. They are formed in places.

As shown in FIGS. 10(b) and 11, the flexible printed circuit board 15 includes a protrusion 156 that fits into the groove 47. The protruding parts 156 are formed at one location on each end of the +Z direction edges of the first coil fixing part 151, the second coil fixing part 152, and the third coil fixing part 153, and protrude in the +Z direction. By fitting the six protrusions 156 into the grooves 47, the ends of the flexible printed circuit board 15 in the +Z direction are positioned in the circumferential direction.

The process of fixing the flexible printed circuit board 15 to the stopper case 40 is performed in the following steps. First, the flexible printed circuit board 15 is bent into a shape that follows the inner peripheral surface of the stopper case 40, and the six protrusions 156 provided on the edge in the +Z direction are inserted into the grooves 47, and the tips of each protrusions 156 are inserted into the grooves 47. It abuts against the bottom surface of the groove 47 (see FIG. 12(b)). Thereby, the flexible printed circuit board 15 is positioned in the optical axis direction (Z-axis direction). Next, the notches 155 are fitted into the three hooks 46, and the edges of the flexible printed circuit board 15 in the -Z direction are locked by the hooks 46. As a result, the first coil fixing part 151, the second coil fixing part 152, and the third coil fixing part 153 are positioned in the X-axis direction and the Y-axis direction (circumferential direction and radial direction), respectively, so that the flexible printed circuit board 15 is temporarily fixed to the stopper case 40 in a state where the position is regulated in three axial directions: the X-axis direction, the Y-axis direction, and the Z-axis direction. After that, using the opening 46a as an adhesive application hole, adhesive is poured into the gap S (see FIG. 12(b)) between the flexible printed circuit board 15 and the stopper case 40 through the opening 46a, and the flexible printed circuit board 15 is is fixed to the stopper case 40.

(Connection structure of coil wire to flexible printed circuit board)
As shown in FIG. 10(b), the flexible printed circuit board 15 has two lands on each edge of the first coil fixing part 151, second coil fixing part 152, and third coil fixing part 153 in the -Z direction. 154 are provided. A winding start side coil wire 101 and a winding end side coil wire 102 are drawn out from each coil in the -Z direction. The ends of the winding start side coil wire 101 and the winding end side coil wire 102 are soldered to different lands 154, respectively.

FIG. 13A is a plan view of the first coil fixing part 151. FIG. 13(b) is a plan view of the second coil fixing part 152. FIG. 13(c) is a plan view of the third coil fixing part 153. In FIG. 13, the fixed position of the coil and the drawn-out position of the coil wire are shown by broken lines. In this embodiment, the first coil 112 and the second coil 122 are oval air-core coils. As shown in FIGS. 10(b) and 13(a), the first coil 112 has two effective sides extending parallel to the X-axis direction. As shown in FIGS. 10(b) and 13(b), the second coil 122 has two effective sides extending parallel to the Y-axis direction. As shown in FIG. 13(c), the rolling correction coil 132 (third coil) is an air-core coil with two effective sides extending parallel to the optical axis direction.

In the first coil 112, the second coil 122, and the rolling correction coil 132, the winding start side coil wire 101 is drawn out in the −Z direction from the inner peripheral portion of each coil. The winding start side coil wire 101 includes a first portion 101a extending from the inner circumference of the coil along the surface in the thickness direction of the coil to the outer circumference of the coil, and a second portion further extending in the -Z direction from the outer circumference of the coil. 101b. As shown in FIGS. 13(a) and 13(b), in the first coil 112 and the second coil 122, the second portion 101b of the winding start side coil wire 101 extends linearly in the −Z direction. . As shown in FIG. 13(c), in the rolling correction coil 132, the second portion 101b of the winding start side coil wire 101 extends in the -Z direction, then bends in the -X direction and is routed to the land 154. ing.

Since the winding end side coil wire 102 is pulled out from the outer peripheral surface of each coil, it does not overlap with each coil in the thickness direction. As shown in FIGS. 13(a) and 13(b), the end-winding coil wires 102 of the first coil 112 and the second coil 122 extend linearly in the −Z direction. As shown in FIG. 13(c), the end-winding coil wire 102 of the rolling correction coil 132 extends in the -Z direction, then bends in the +X direction and is routed to the land 154.

The flexible printed circuit board 15 includes a flexible base material 15a made of polyimide resin, and a coverlay film 15b that covers the surface of the flexible base material 15a and insulates the wiring pattern provided on the flexible base material 15a. Note that the first coil fixing part 151, the second coil fixing part 152, and the third coil fixing part 153 may include a reinforcing plate (not shown) laminated on the back side of the flexible base material 15a. .

The first coil fixing part 151, the second coil fixing part 152, and the third coil fixing part 153 each have a coil installation surface 157 on which a coverlay film 15b is arranged on the surface of the flexible base material 15a, and a flexible base material 15a. A concave portion 158 in which the coverlay film 15b is not disposed is provided on the surface of the base material 15a. In the concave portion 158, the flexible base material 15a is exposed, or the land 154 formed on the surface of the flexible base material 15a is exposed, and in the portion where the flexible base material 15a is exposed, It is recessed from the coil installation surface 157 by the thickness of the coverlay film 15b. In this embodiment, the end of the copper foil constituting the land 154 is held down by the end of the coverlay film 15b surrounding the concave portion 158.

As shown in FIGS. 13(a), 13(b), and 13(c), two concave portions 158 are provided in each coil fixing portion. That is, the concave portion 158 includes a first concave portion 158a where the land 154 connected to the winding start side coil wire 101 is arranged, and a second concave portion 158a where the land 154 connected to the winding end side coil wire 102 is disposed. A concave portion 158b is provided. The first concave portion 158a and the second concave portion 158b are arranged side by side at a predetermined interval on the −Z direction edge of each coil fixing portion. At the edge of the first coil fixing portion 151 in the −Z direction, a second concave portion 158b and a first concave portion 158a are arranged apart from each other in the X-axis direction. A second concave portion 158b and a first concave portion 158a are arranged at the edge of the second coil fixing portion 152 in the −Z direction so as to be spaced apart from each other in the Y-axis direction. At the edge of the third coil fixing portion 153 in the −Z direction, a second concave portion 158b and a first concave portion 158a are arranged apart from each other in the X-axis direction.

As shown in FIGS. 13(a), 13(b), and 13(c), the first concave portion 158a extends from the position overlapping the inner peripheral portion of each coil in the −Z direction of each coil fixing portion. Expands to the edges. A land 154 is arranged on the edge of the first concave portion 158a in the −Z direction, and the flexible base material 15a is exposed on the +Z side of the land 154. On the other hand, the second concave portion 158b is provided at the edge of each coil fixing portion in the −Z direction, and only the land 154 is exposed.

As shown in FIGS. 13(a) and 13(b), the first coil fixing part 151 and the second coil fixing part 152 are provided with two circular holes 159 spaced apart in the circumferential direction. 159 overlaps with the inner peripheral edges of the first coil 112 and the second coil 122. The first concave portion 158a extends from the land 154 in the optical axis direction (+Z direction) and extends to the edge of one circular hole 159. The drawing position at which the winding start side coil wire 101 of the first coil 112 and the second coil 122 is drawn out is a position where it overlaps with the circular hole 159 or the first concave portion 158a. Therefore, the winding start side coil wire 101 is accommodated in the first concave portion 158a and drawn out to the outer peripheral side of the first coil 112 and the second coil 122.

As shown in FIG. 13(c), the third coil fixing portion 153 includes two circular holes 159 that completely overlap the rolling correction coil 132. The first concave portion 158a provided in the third coil fixing portion 153 extends from the land 154 in the circumferential direction (+X direction) and widens to the edge of one circular hole 159. The position where the winding start side coil wire 101 of the rolling correction coil 132 is pulled out is a position where it overlaps with the circular hole 159 or the first concave portion 158a. Therefore, the winding start side coil wire 101 is accommodated in the first concave portion 158a and drawn out to the outer circumferential side of the rolling correction coil 132.

FIG. 14 is a sectional view of the first concave portion 158a, taken along the line CC in FIG. 13(a). As described above, the first concave portion 158a includes a region that overlaps with the first coil 112, and this region is recessed from the coil installation surface 157 by the thickness of the coverlay film 15b. As shown in FIG. 14, the first portion 101a of the winding start side coil wire 101 pulled out from the inner peripheral portion of the first coil 112 is inserted into the gap S1 between the first coil 112 and the bottom surface of the first concave portion 158a. Since the coil wire 101 is accommodated, the winding start side coil wire 101 is not pinched between the coil installation surface 157 and the first coil 112. In this embodiment, the level difference between the coil installation surface 157 and the first concave portion 158a is 50 μm to 60 μm, and the wire diameter of the winding start side coil wire 101 is 55 μm to 70 μm. Therefore, since substantially the entire winding start side coil wire 101 can be accommodated in the first concave portion 158a, lifting of the first coil 112 from the coil installation surface 157 can be reduced. Thereby, the positional accuracy of the first coil 112 can be improved, and variations in the gap between the first coil 112 and the first magnet 111 (first magnet) can be reduced.

Although the second concave portion 158b does not extend to a position where it overlaps with the first coil 112, the winding end side coil wire 102 is pulled out from the outer peripheral surface of the first coil 112, and The winding end side coil wire 102 is not arranged on the surface. Therefore, even if the second concave portion 158b has not expanded to a position where it overlaps the first coil 112, the first coil 112 will not rise from the coil installation surface 157.

The winding start side coil wire 101 drawn out from the second coil 122 and the winding start side coil wire 101 drawn out from the rolling correction coil 132 (third coil) are also connected to the first concave portion 158a by the same structure. be accommodated. Therefore, floating of the second coil 122 from the coil installation surface 157 of the second coil fixing portion 152 can be reduced. Moreover, floating of the rolling correction coil 132 from the coil installation surface 157 of the third coil fixing part 153 can be reduced. Therefore, the positional accuracy of the second coil 122 and the rolling correction coil 132 can be improved, and the variation in the gap between the second coil 122 and the second magnet 121 (second magnet) and the rolling correction coil 132 and the rolling correction can be improved. Variations in the gap with the correction magnet 131 (third magnet) can be reduced. Therefore, the magnetic circuit characteristics of the shake correction magnetic drive mechanism 10 and the rolling correction magnetic drive mechanism 13 can be stabilized.

(Assembling method)
The optical unit 1 with shake correction function can be assembled by following the steps (1) to (9) below.
(1) Fixing the elastic support member 9 to the cover bottom 20. (2) Assembling the frame case 30 to the cover bottom 20 from the +Z direction. Subsequently, the FPC cover 50 is assembled to the cover bottom 20 and the frame case 30 from the +Z direction.
(3) Magnets (first magnet 111, second magnet 121, rolling correction magnet 131) are positioned and fixed on the outer peripheral surface of the holder 16, and the rotation support mechanism 6 is assembled to the bottom of the holder 16.
(4) Place the holder 16, rotation support mechanism 6, and magnet assembled in the previous step (3) on the elastic support member 9 from the +Z direction.
(5) Connect the gimbal spring 70 to the rotation support mechanism 6 and the frame case 30. (6) Fix the coils (first coil 112, second coil 122, rolling correction coil 132) to the flexible printed circuit board 15, and The drawn-out coil wire is electrically connected to the land 154 of the flexible printed circuit board 15.
(7) Position and fix the flexible printed circuit board 15 on the inner surface of the stopper case 40. (8) Place the stopper case 40 to which the coil and flexible printed circuit board 15 are fixed over the gimbal spring 70 and frame case 30 from the +Z direction, and cover it. It is locked to the bottom 20 and the FPC cover 50.
(9) Assemble the camera module 4 to which the flexible printed circuit board 14 is connected to the holder 16 from the +Z direction, and house the flexible printed circuit board 14 in the FPC cover 50.

(Main effects of this form)
As described above, the optical unit 1 with a shake correction function of the present embodiment includes a movable body 5 including a camera module 4, and a movable body 5 that is rotatable around the first axis R1 that intersects the optical axis L of the camera module 4. a gimbal mechanism 7 that supports and is rotatably supported around a second axis R2 that intersects the optical axis L and intersects the first axis R1; a fixed body 8 that supports the movable body 5 via the gimbal mechanism 7; A magnetic drive mechanism for shake correction that includes coils (first coil 112, second coil 122) arranged on the fixed body 8 and magnets (first magnet 111, second magnet 112) arranged on the movable body 5. 10, and a flexible printed circuit board 15 including a coil fixing part (first coil fixing part 151, second coil fixing part 152).

In this embodiment, the first coil fixing part 151 and the second coil fixing part 152 of the flexible printed circuit board 15 are respectively a coil installation surface 157 on which the coverlay film 15b is arranged on the surface of the flexible base material 15a, and a flexible substrate 15a. A concave portion 158 in which the coverlay film 15b is not disposed is provided on the surface of the flexible base material 15a. Since the concave portion 158 is recessed from the coil installation surface 157 by the thickness of the coverlay film 15b, the winding start side coil wire 101 drawn out from each coil is accommodated in the gap S1 between each coil and the concave portion 158. By doing so, it is possible to reduce the floating of each coil from the coil installation surface 157. Therefore, the positional accuracy of each coil can be improved, and variations in the gap between each coil and the magnet can be reduced. Therefore, the magnetic circuit characteristics of the shake correction magnetic drive mechanism 10 can be stabilized.

In addition, this embodiment includes a rotation support mechanism 6 that rotatably supports the movable body 5 around the optical axis, and a rolling correction magnetic drive mechanism 13 that rotates the movable body 5 around the optical axis. , a rolling correction coil 132 (third coil), and a rolling correction magnet 131 (third magnet), and the flexible printed circuit board 15 includes a third coil fixing portion 153. Like the first coil fixing part 151 and the second coil fixing part 152, the third coil fixing part 153 includes a coil installation surface 157 and a concave part 158, and has a winding start side pulled out from the rolling correction coil 132. The coil wire 101 can be accommodated in the gap S1 between the rolling correction coil 132 and the concave portion 158. Therefore, floating of the rolling correction coil 132 from the coil installation surface 157 can be reduced, and the positional accuracy of the rolling correction coil 132 can be improved. Therefore, the magnetic circuit characteristics of the rolling correction magnetic drive mechanism 13 can be stabilized.

In this embodiment, the winding start side coil wire 101 extending from the inner circumferential side to the outer circumferential side of each coil along the surface of each coil is accommodated in the gap between each coil and the concave portion 158. Since the winding start side coil wire 101 needs to be drawn out from the inner circumference of the coil, it has conventionally been sandwiched between the coil and the flexible printed circuit board, causing the coil to float. In this embodiment, since the winding start side coil wire 101 can be accommodated in the concave portion 158, it is possible to reduce the floating of each coil from the coil installation surface 157.

In this embodiment, the winding end side coil wire 102 drawn out from each coil is provided, and the concave portion 158 includes a first concave portion 158a where the land 154 connected to the winding start side coil wire 101 is arranged, and a winding end side coil wire 102 drawn out from each coil. The second concave portion 158b is provided with a land 154 connected to the side coil wire 102. Therefore, the winding start side coil wire 101 accommodated in the first concave portion 158a can be connected to the land 154 inside the first concave portion 158a, so that the winding start side coil wire 101 can be easily connected to the land 154. Furthermore, since the land 154 is formed in the portion where the coverlay film 15b is removed (the first concave portion 158a, the second concave portion 158b), the land 154 is formed in the wiring pattern formed on the surface of the flexible base material 15a. Easy to connect.

In this embodiment, the first concave portion 158a is located at a position overlapping each coil from the edge in the −Z direction of each coil fixing portion (first coil fixing portion 151, second coil fixing portion 152, third coil fixing portion 153). It expands continuously until. Therefore, all of the surplus portion of the winding start side coil wire 101 that is routed from the inner peripheral portion of each coil to the land 154 can be accommodated in the first concave portion 158a. Further, since the land 154 can be formed on the edge of each coil fixing portion, it is easy to solder the coil wire to the land 154.

In this embodiment, the second concave portion 158b is arranged along with the first concave portion 158a at the −Z direction edge of each coil fixing portion. In this way, by forming the two lands 154 side by side on the edges in the same direction, the winding start side coil wire 101 and the winding end side coil wire 102 can be soldered from the same direction. Therefore, the connection work between the flexible printed circuit board 15 and each coil is easy.

In this embodiment, the fixed body 8 includes a stopper case 40 that surrounds the outer circumferential side of the movable body 5, and the first coil fixing part 151, the second coil fixing part 152, and the third coil fixing part 153 are attached to the stopper case 40. It extends in the circumferential direction. A first concave portion 158a and a second concave portion 158b are arranged in the circumferential direction on the edges of the first coil fixing portion 151, the second coil fixing portion 152, and the third coil fixing portion 153 in the optical axis direction, respectively. It will be placed in Therefore, the three sets of winding start side coil wires 101 and winding end side coil wires 102 pulled out from the three coils can all be soldered from the same direction, making it easy to connect the flexible printed circuit board 15 and the coils.

Note that although this embodiment has a configuration in which a coil is arranged on the fixed body 8 and a magnet is arranged on the movable body 5, the present invention can be applied to a form in which the arrangement of the magnet and the coil is reversed. It is. That is, a configuration may be adopted in which a magnet is disposed on the fixed body 8 and a coil is disposed on the movable body 5. Further, in this embodiment, the flexible printed circuit board 15 and the coil are arranged on the inner peripheral surface of the stopper case 40, but in the present invention, the flexible printed circuit board and the coil are arranged on the outer peripheral surface of the case surrounding the movable body 5. configuration may be adopted.

DESCRIPTION OF SYMBOLS 1... Optical unit with shake correction function, 2... Lens, 3... Image pickup element, 4... Camera module, 4a... Camera module main body, 4b... Lens barrel part, 5... Movable body, 6... Rotation support mechanism, 7... Gimbal mechanism , 8... Fixed body, 9... Elastic support member, 10... Magnetic drive mechanism for shake correction, 11... First magnetic drive mechanism for shake correction, 12... Second magnetic drive mechanism for shake correction, 13... Magnetic drive for rolling correction. Mechanism, 14, 15... Flexible printed circuit board, 15a... Flexible base material, 15b... Coverlay film, 16... Holder, 20... Cover bottom, 21... First elastic engagement part, 22... First locking part, 23... Second elastic engagement part, 24... Second locking part, 25... Circular hole, 26... Third elastic engagement part, 27... Engagement hole, 30... Frame case, 31... Rectangular frame part, 32... First vertical frame part, 33... Second vertical frame part, 34... Plate part, 35... Protrusion part, 36... Plate part, 37... Arm part, 38... Protrusion part, 39... Second shaft side cylinder part, 40... Stopper case, 40A... body part, 41... first case wall, 42... second case wall, 43... third case wall, 44... end plate part, 45A... first case protrusion, 45B... second case protrusion, 46 ...Hook, 46a...Opening, 47...Concave groove, 48...Magnetic member arrangement groove, 49...Engagement hole, 50...FPC cover, 51...Notch, 52...Hooking part, 53...Locking part, 61... Shaft part, 62...Bearing, 63...Plate holder, 64...Adsorption magnet, 65...Plate holder cylindrical part, 66...Plate holder annular part, 67...Plate holder extension part, 68...First shaft side concave curved surface, 70... Gimbal spring, 71... First connection mechanism, 72... Second connection mechanism, 73... Gimbal spring frame section, 74... First gimbal spring extension section, 75... Second gimbal spring extension section, 76... Gimbal spring relief section, 77... First Shaft side cylinder part, 78... Arm part, 79... Second shaft side concave curved surface, 101... Winding start side coil wire, 101a... First part, 101b... Second part, 102... Winding end side coil wire, 111... No. 1 magnet, 112...first coil, 113...first magnetic member, 121...second magnet, 122...second coil, 123...second magnetic member, 131...rolling correction magnet, 132...rolling correction coil, 151 ...first coil fixing part, 152...second coil fixing part, 153...third coil fixing part, 154...land, 155...notch part, 156...protrusion part, 157...coil installation surface, 158...concave shaped part, 158a...First concave portion, 158b...Second concave portion, 159...Circular hole, 160...Notch, 161...Holder bottom, 162...Holder frame, 440...Case positioning hole, 610...Step, 621 ...inner ring, 622...outer ring, 623...sphere, 624...retainer, 710...first shaft side shaft, 720...second shaft side shaft, 731...tapered part, 732...groove part, 761...projection part, 762...bent part, 763...Straight line part, L...Optical axis, R1...First axis, R2...Second axis, S, S1...Gap

Claims (8)

a movable body including a camera module;
A rocking motion in which the movable body is rotatably supported around a first axis that intersects with the optical axis of the camera module, and rotatably supported around a second axis that intersects with the optical axis and the first axis. a support mechanism;
a fixed body that supports the movable body via the swing support mechanism;
a shake correction magnetic drive mechanism including a coil disposed on one of the fixed body and the movable body, and a magnet disposed on the other of the fixed body and the movable body;
A flexible printed circuit board equipped with a coil fixing part,
The coil fixing portion includes a coil installation surface on which a coverlay film is disposed on the surface of the flexible base material, and a concave portion on the surface of the flexible base material where the coverlay film is not disposed on the surface of the flexible base material. Prepare,
An optical unit with a shake correction function, wherein a coil wire drawn out from the coil is housed in a gap between the coil and the concave portion. 2. The optical unit with a shake correction function according to claim 1, wherein the coil wire is a winding start side coil wire extending from an inner circumferential side to an outer circumferential side of the coil along the surface of the coil. comprising a winding end side coil wire drawn out from the coil,
The concave portion is
a first concave portion in which a land connected to the winding start side coil wire is arranged;
3. The optical unit with a shake correction function according to claim 2, further comprising a second concave portion in which a land connected to the winding end side coil wire is arranged. 4. The optical unit with a shake correction function according to claim 3, wherein the first concave portion extends continuously from an edge of the coil fixing portion to a position overlapping the coil. 5. The optical unit with a shake correction function according to claim 4, wherein the second concave portion is arranged on an edge of the coil fixing portion in line with the first concave portion. The coil includes a first coil and a second coil,
The magnet includes a first magnet facing the first coil and a second magnet facing the second coil,
The coil fixing part includes a first coil fixing part to which the first coil is fixed, and a second coil fixing part to which the second coil is fixed,
The first coil fixing part and the second coil fixing part each include the first concave part and the second concave part, according to any one of claims 3 to 5. Optical unit with shake correction function. The fixed body includes a case surrounding the outer peripheral side of the movable body,
The first coil fixing part and the second coil fixing part extend in a circumferential direction along the case,
The first concave portion and the second concave portion are arranged side by side in the circumferential direction on the edges of the first coil fixing portion and the second coil fixing portion in the optical axis direction, respectively. The optical unit with a shake correction function according to claim 6. a rotation support mechanism that rotatably supports the movable body around the optical axis; and a rolling correction magnetic drive mechanism that rotates the movable body around the optical axis;
The rolling correction magnetic drive mechanism includes a third coil and a third magnet facing the third coil,
The flexible printed circuit board includes a third coil fixing part to which the third coil is fixed, and the first coil fixing part, the second coil fixing part, and the third coil fixing part are arranged along the case. Extending in the circumferential direction,
The first concave portion and the second concave portion are formed in the circumferential direction on the edges of the first coil fixing portion, the second coil fixing portion, and the third coil fixing portion in the optical axis direction, respectively. 8. The optical unit with a shake correction function according to claim 7, wherein the optical unit is arranged side by side.

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