JP6989254B2 - Optical module and optical unit - Google Patents

Description

The present invention relates to an optical unit that performs rolling correction by rotating an optical element around an optical axis, and an optical module used for the optical unit that performs rolling correction.

The optical unit mounted on the mobile terminal or mobile body is provided with a mechanism for correcting the shake by swinging or rotating the optical element in order to suppress the disturbance of the captured image when the mobile terminal or mobile body is moving. There is. For example, the optical unit of Patent Document 1 swings an optical module including an optical element in the pitching direction and the yawing direction in response to tilts in two directions of pitching (pitch / tilting) and yawing (rolling / panning). It is equipped with a swing mechanism to move it. Further, it is provided with a rolling correction mechanism for rotating a movable body having an optical module and a swing mechanism around the optical axis in response to rotation of the optical element around the optical axis.

JP-A-2015-082072

In the optical unit of Patent Document 1, the support mechanism and the rolling correction mechanism that rotatably support the optical module around the optical axis are configured on the outside of the movable body provided with the optical module and the swing mechanism. As described above, when the support mechanism for rolling and the rolling correction mechanism are provided on the outside of the optical module, there is a problem that the optical unit becomes large.

For example, in the optical unit of Patent Document 1, a rotary bearing such as a ball bearing is arranged on one side (image side) of the optical module in the optical axis direction, and the rolling correction mechanism is on the image side of the rotary bearing or the outer peripheral side of the rotary bearing. Be placed. In such a configuration, it is necessary to provide an installation space for the rolling correction mechanism on the image side of the optical module, and the dimension of the optical unit in the optical axis direction becomes large. Alternatively, the rolling correction mechanism can be provided on the outer peripheral side of the movable body, but in this case, the outer shape of the optical unit when viewed from the optical axis direction becomes large.

Further, instead of performing mechanical correction (that is, correction of swinging the optical module by a swing mechanism), rolling correction can be performed by electronic correction of the captured image by the optical element, but the rolling correction has a correction angle. It is often large, and when the correction angle is large, the effective image area becomes small due to electronic correction. Therefore, deterioration of image quality becomes a problem. In addition, an increase in current consumption due to electronic correction is also a problem.

In view of these points, an object of the present invention is to suppress the increase in size of the optical unit due to the provision of the rolling correction mechanism for rotating the optical module around the optical axis.

In order to solve the above problems, the present invention presents an optical element, a lens barrel portion that holds the optical element, a support, and the lens barrel portion around the optical axis of the optical element with respect to the support. It has a rolling support mechanism that rotatably supports the lens barrel, and a rolling magnetic drive mechanism that is fixed to the lens barrel and rotates the lens barrel around the optical axis. The rolling magnetic drive mechanism is a magnet. And a coil, one of the magnet and the coil is fixed to the lens barrel portion, the other is fixed to the support, and the rolling support mechanism is an end portion of the lens barrel portion on the subject side, and. It is characterized in that it is a rotary bearing portion provided at two positions at the end portion on the image side of the lens barrel portion.

According to the present invention, the lens barrel portion that holds the optical element is rotated around the optical axis to perform rolling correction. Therefore, as compared with the conventional configuration in which the entire optical module is rotated, the rotating portion is small and lightweight, so that it can be rotated with a small force. Therefore, the magnetic drive mechanism for rolling can be miniaturized. Therefore, the optical module that performs rolling correction can be miniaturized, and it is not necessary to provide a rolling correction mechanism on the outside of the optical module 1. Therefore, it is possible to suppress an increase in the size of the optical unit that performs rolling correction. Further, since the rotating part is small and lightweight, the response to the driving force applied from the rolling magnetic drive mechanism is good. Further, since the lens barrel portion can be supported at two locations separated in the optical axis direction, the lens barrel portion can be supported without rattling, and the tilt of the lens barrel portion can be suppressed.

In the present invention, the rotary bearing portion is a ball bearing, the inner ring of the ball bearing is fixed to the lens barrel portion, and the outer ring of the ball bearing is fixed to the support. By using ball bearings, it is possible to suppress an increase in rotational load due to friction or the like.

In the present invention, it is desirable that the lens barrel portion includes a magnet holding portion to which the magnet is fixed, and the coil is fixed to the support. By doing so, it is not necessary to provide a component for supplying power to the coil on the lens barrel portion side, so that wiring can be simplified.

In the present invention, there is a magnetic sensor arranged at a position facing the magnetizing polarization line of the magnet, and the rolling magnetic drive mechanism is controlled based on the origin position detected based on the output of the magnetic sensor. It is desirable to be done. In this way, it is not necessary to provide a spring for returning to the origin position, so that it is possible to eliminate the swing back when returning to the origin position. Further, since it is not necessary to secure a space for providing the spring, it is advantageous for miniaturization.

Next, the optical unit of the present invention has the above-mentioned optical module and a runout correction unit for correcting the runout around the axis intersecting the optical axis of the optical module. Since the above optical module is equipped with a magnetic drive mechanism for rolling, a rolling correction function can be added simply by mounting the optical module on the optical unit. In addition, the above optical module can reduce the size of the rolling magnetic drive mechanism. Therefore, it is possible to suppress the increase in size of the optical unit provided with the rolling correction mechanism.

In the present invention, when the swinging magnetic drive mechanism for swinging the optical module in the first direction and the second direction intersecting the optical axis is used as the runout correction unit, the optical module is the first. It is desirable to be supported by a gimbal mechanism including a swing support portion arranged at an angular position between one direction and the second direction, and a movable frame supported by the swing support portion. In this way, the swing support portion of the gimbal mechanism can be arranged by utilizing the space between the angular positions (first direction and second direction) in which the swing magnetic drive mechanism is arranged. Therefore, the optical unit can be miniaturized.

Alternatively, in the present invention, the shake correction unit may be an image processing unit that performs correction processing corresponding to the shake around the axis intersecting the optical axis of the optical module with respect to the image captured by the optical module. good. By doing so, it is not necessary to provide a swing mechanism for performing pitching correction and yawing correction, so that the optical unit can be further miniaturized. The runout correction (pitching correction and yawing correction) around the axis orthogonal to the optical axis generally has a smaller correction angle than the rolling correction. Therefore, even if electronic correction is performed, there is little possibility that a decrease in the effective image area or an increase in current consumption becomes a problem.

According to the present invention, since the optical module is equipped with a rolling magnetic drive mechanism (rolling correction mechanism), it is not necessary to provide a rolling correction mechanism on the outside of the optical module when performing rotation correction around the optical axis. Therefore, it is possible to suppress the increase in size of the optical unit provided with the rolling correction mechanism. Further, in the present invention, when incorporating the rolling magnetic drive mechanism into the optical module, the lens barrel portion that holds the optical element is configured to rotate around the optical axis. Therefore, since the rotating portion is small and lightweight, it can be rotated with a small force. Therefore, it is possible to reduce the size of the magnetic drive mechanism for rolling, it can be miniaturized optical module. Further, since the rotating part is small and lightweight, the response to the driving force applied from the rolling magnetic drive mechanism is good. Further, since the lens barrel portion can be supported at two locations separated in the optical axis direction, the lens barrel portion can be supported without rattling, and the tilt of the lens barrel portion can be suppressed.

It is a perspective view which looked at the optical module of a reference form from the subject side. It is sectional drawing of the optical module of FIG. It is an exploded perspective view of the optical module of FIG. It is a perspective view of the optical unit equipped with the optical module of FIG. It is an exploded perspective view of the optical unit of FIG.

Hereinafter, with reference to the accompanying drawings, illustrating an embodiment in which optical science module and an optical module by applying the reference embodiment and the present invention of an optical unit mounted. In the present specification, the three axes of XYZ are 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 coincides with the optical axis direction L of the optical module. The −Z direction is the image side of the optical axis direction L, and the + Z direction is the subject side of the optical axis direction L.

1 is a perspective view of the optical module 1 of the reference form as viewed from the subject side, FIG. 2 is a cross-sectional view of the optical module 1 of FIG. 1 (AA cross-sectional view of FIG. 1), and FIG. 3 is FIG. It is an exploded perspective view of the optical module 1 of. Further, FIG. 4 is a perspective view of the optical unit 100 equipped with the optical module 1 of FIG. 1 as viewed from the subject side. The optical module 1 includes an optical element 2 and is mounted on the optical unit 100. The optical unit 100 (see FIG. 4) is used for optical devices such as mobile phones with cameras and drive recorders, and optical devices such as action cameras and wearable cameras mounted on helmets, bicycles, radiocon helicopters and the like. In such an optical device, if blurring occurs during shooting, the captured image is distorted. The optical unit 100 corrects the tilt of the optical element 2 in order to prevent the captured image from tilting.

(Optical module)
As shown in FIGS. 1 to 3, the optical module 1 illuminates a camera module 10 including an optical element 2, a support 20 which is a case for accommodating the camera module 10, and a camera module 10 with respect to the support 20. A rolling support mechanism 30 that rotatably supports the camera module 10 and a rolling magnetic drive mechanism 40 that rotates the camera module 10 around the optical axis with respect to the support 20 are provided. The camera module 10 includes an optical element 2 such as a lens, a lens barrel portion 50 that holds the optical element 2, and a substrate 60 on which an image sensor and a signal processing circuit are mounted.

As shown in FIGS. 2 and 3, the lens barrel portion 50 includes a tubular portion 51 that holds the optical element 2 and a flange portion 52 provided at the end of the tubular portion 51 on the image side (−Z direction). A wall-shaped magnet holding portion 53 that rises from the outer peripheral edge of the flange portion 52 toward the subject (+ Z direction) is arranged on the outer peripheral side of the tubular portion 51. The substrate 60 is fixed to the flange portion 52. A step portion 54 is formed on the outer peripheral surface of the tubular portion 51 at a position substantially intermediate in the optical axis direction L. The tubular portion 51 includes a cylindrical portion 55 extending from the step portion 54 toward the subject side (+ Z direction) and a large diameter portion 56 extending from the step portion 54 toward the image side (−Z direction). The large diameter portion 56 is connected to the flange portion 52.

The flange portion 52 and the magnet holding portion 53 have a substantially rectangular outer shape when viewed from the optical axis direction L. The magnet holding portion 53 is a separate member from the cylindrical portion 51 and the flange portion 52, and is fixed to the flange portion 52. The magnet holding portion 53 may be integrally formed with the tubular portion 51 and the flange portion 52. The magnet holding portion 53 includes wall portions 531 and 532 facing in the X-axis direction and wall portions 533 and 534 facing in the Y-axis direction. The wall portions 531 to 534 are connected so as to form a square cylinder as a whole. The wall portions 531 to 534 do not have to be connected in the circumferential direction. Further, the magnet holding portion 53 does not have to have a shape protruding in the + Z direction from the flange portion 52, and may have a shape protruding in the radial direction from the outer peripheral surface of the tubular portion 51.

The support 20 includes a front plate portion 21 and a body portion 22 that rises from the outer peripheral edge of the front plate portion 21 toward the image side (−Z direction). The front plate portion 21 has a rectangular plate shape perpendicular to the optical axis direction L, and a circular opening 23 is formed in the center thereof. As shown in FIG. 1, the rolling support mechanism 30 and the end portion of the camera module 10 on the subject side (+ Z direction) are arranged in the circular opening 23. The optical element 2 held in the lens barrel portion 50 of the camera module 10 is exposed to the subject side (+ Z direction) from the circular opening portion 23 of the front plate portion 21. The body portion 22 has a square cylinder shape as a whole, and includes side plates 221 and 222 facing in the X-axis direction and side plates 223 and 224 facing in the Y-axis direction. The side plate 221 faces the wall portion 531 provided in the lens barrel portion 50 in the X-axis direction. Further, the side plate 222 faces the wall portion 532 provided in the lens barrel portion 50 in the X-axis direction.

The rolling support mechanism 30 is attached to the circular opening 23 of the support 20. The rolling support mechanism 30 is a ball bearing and can roll between the outer ring 31 fixed to the inner peripheral edge of the circular opening 23, the inner ring 32 fixed to the lens barrel 50, and the outer ring 31 and the inner ring 32. It comprises a plurality of spheres 33 held in. The inner ring is fixed to the outer peripheral surface of the cylindrical portion 55 provided at the end portion of the lens barrel portion 50 on the subject side. The spheres 33 are held so as not to come into contact with each other by a cage (not shown) or the like. Further, a seal plate 34 covering a gap in which the sphere 33 is arranged is attached between the inner ring 32 and the outer ring 31. The seal plate 34 is arranged on the + Z direction side and the −Z direction side of the sphere 33.

The rolling magnetic drive mechanism 40 includes a magnet 41 and a coil 42 wound around an axis perpendicular to the magnetizing surface of the magnet. The magnet 41 is fixed to the magnet holding portion 53 provided in the lens barrel portion 50, and the coil is fixed to the inner surface of the body portion 22 of the support 20. More specifically, the magnet 41 is fixed to the outer surface of the wall portions 531 and 532 of the lens barrel portion 50. Further, the coil 42 is fixed to the inner side surface of the side plates 221 and 222 of the body portion 22. As a result, as shown in FIG. 2, the rolling magnetic drive mechanism 40 in which the magnet 41 and the coil 42 face each other in the X-axis direction is configured at two locations on the + X direction side and the −X direction side of the lens barrel portion 50.

The magnet 41 of the magnetic drive mechanism 40 for rolling is divided into two in the circumferential direction around the optical axis (that is, in the Y-axis direction), and the magnetic pole of the surface facing the coil 42 is defined by the division position (magnetization polarization line). It is magnetized differently. The coil 42 is an air-core coil, and a side extending in a direction intersecting the circumferential direction is used as an effective side. The two sets of magnetic driving mechanisms for rolling 40 are connected by wiring so that magnetic driving forces in the same direction around the optical axis are generated when energized.

A magnetic sensor 43 (see FIG. 2) is arranged at a position facing the magnetizing polarization line of the magnet 41. The magnetic sensor 43 is arranged in the center of the coil 42 and is fixed to the inner surface of the support 20 side plate 221. The magnetic sensor 43 can also be arranged in the center of the coil 42 fixed to the side plate 222. In the optical module 1, the lens barrel portion 50 that holds the optical element 2 is rotatably supported around the optical axis by the rolling support mechanism 30. The rolling magnetic drive mechanism 40 is controlled based on the origin position in the rolling direction detected based on the signal from the magnetic sensor 43, and the lens barrel portion 50 holding the optical element 2 is rotated around the optical axis for rolling. Make corrections. That is, the optical module 1 can perform rolling correction by the optical module 1 alone by the rolling magnetic drive mechanism 40 incorporated therein.

(Optical unit)
FIG. 5 is an exploded perspective view of the optical unit of FIG. Hereinafter, the configuration of the optical unit 100 on which the optical module 1 is mounted will be described with reference to FIGS. 4 and 5. The optical unit 100 can swing the holder 3 with respect to the optical module 1, the holder 3 for holding the optical module 1, the fixed body 4 which is a case for accommodating the optical module 1 and the holder 3, and the fixed body 4. A gimbal mechanism 5 that supports the holder 3, a swinging magnetic drive mechanism 6 that swings the holder 3 with respect to the fixed body 4, and a spring member 7 that connects the holder 3 and the fixed body 4 are provided.

The holder 3 is swingably supported by the gimbal mechanism 5 around the first axis line R1 orthogonal to the optical axis direction L, and around the second axis line R2 orthogonal to the optical axis direction L and the first axis line R1. It is supported so that it can swing. The first axis line R1 and the second axis line R2 are diagonal directions of the fixed body 4, and are inclined by 45 degrees with respect to the X-axis direction and the Y-axis direction. The optical module 1 is fixed to the holder 3. Therefore, the optical module 1 swings integrally with the holder 3.

The fixed body 4 includes a first case 410 having a substantially square outer shape when viewed from the optical axis direction L (Z-axis direction), and a second case 420 assembled from the −Z direction side with respect to the first case 410. Be prepared. The first case 410 is fixed to the second case 420 by welding or the like. The first case 410 includes a square cylindrical body portion 411 that surrounds the holder 3, and a rectangular frame-shaped end plate portion 412 that projects inward from the end portion of the body portion 411 in the + Z direction. A window 413 is formed in the center of the end plate portion 412. The body portion 411 includes a pair of side plates 401 and 402 facing in the X-axis direction and a pair of side plates 403 and 404 facing in the Y-axis direction. The second case 420 is composed of two members, a rectangular frame-shaped first member 421 and a rectangular frame-shaped second member 422 attached to the + Z direction side of the first member 421.

The holder 3 includes a holder main body 310 to which the optical module 1 is fixed, and a pair of wall portions 301 and 302 extending in the Y-axis direction on both sides of the optical module 1 fixed to the holder main body 310 in the X-axis direction. A pair of wall portions 303 and 304 extending in the X-axis direction are provided on both sides of the optical module 1 in the Y-axis direction. The holder main body 310 is substantially rectangular when viewed from the optical axis direction, and the wall portions 301 to 304 are provided on the outer peripheral edge of the holder main body 310. Further, a stopper 312 is provided at the end of the holder main body 310 in the −Z direction in contact with the second case 420 of the fixed body 4 to regulate the swing range of the holder 3.

The gimbal mechanism 5 is configured between the holder 3 and the fixed body 4. The gimbal mechanism 5 is provided at a diagonal position on the second axis R2 of the fixed body 4 and a first rocking support portion 501 provided at a diagonal position on the first axis R1 of the holder main body 310. 2 The swing support portion 502 and the movable frame 503 supported by the first swing support portion 501 and the second swing support portion 502 are provided. The first axis line R1 and the second axis line R2 are orthogonal to the optical axis direction L and are inclined by 45 degrees with respect to the X-axis direction and the Y-axis direction, and the first axis line R1 and the second axis line R2 are orthogonal to each other. do. The second swing support portion 502 is formed on the first member 421 that constitutes the second case 420 of the fixed body 4. The movable frame 503 is a plate-shaped spring including fulcrum portions 504 provided at four locations around the optical axis and connecting portions 505 connecting adjacent fulcrum portions 504 around the optical axis.

A metal sphere (not shown) is fixed to the inner surface of each fulcrum portion 504 in the movable frame 503 by welding or the like. This sphere makes point contact with the contact spring 511 held by the first rocking support portion 501 provided on the holder 3 and the second rocking support portion 502 provided on the fixed body 4. The contact spring 511 is a plate-shaped spring, and the contact spring 511 held by the first swing support portion 501 is elastically deformable in the direction of the first axis R1 and is held by the second swing support portion 502. 511 is elastically deformable in the second axis R2 direction. Therefore, the movable frame 503 is supported in a state of being rotatable in each of the two directions (the first axis R1 direction and the second axis R2 direction) orthogonal to the optical axis direction L.

The swing magnetic drive mechanism 6 includes four sets of magnetic drive mechanisms 601 provided between the holder 3 and the fixed body 4. Each magnetic drive mechanism 601 includes a magnet 602 and a coil 603. The coil 603 is held on the outer surfaces of the wall portions 301 and 302 on both sides of the holder 3 in the X-axis direction and the wall portions 303 and 304 on both sides of the holder 3 in the Y-axis direction. The magnet 602 is held on the inner surface of the side plates 401, 402, 403, 404 provided in the first case 410 of the fixed body 4. The first case 410 is made of a magnetic material and functions as a yoke for the magnet 602.

Between the holder 3 and the fixed body 4, a magnetic drive mechanism 601 in which the magnet 602 and the coil 603 face each other is configured on any of the + X direction side, the −X direction side, the + Y direction side, and the −Y direction side. .. The magnet 602 is divided into two in the optical axis direction L (that is, in the Z-axis direction), and the magnetic poles on the inner surface side are magnetized differently with the divided position (magnetized polarization line) as a boundary. The coil 603 is an air-core coil, and the long side portions on the + Z direction side and the −Z direction side are used as effective sides.

The two sets of magnetic drive mechanisms 601 located on the + Y direction side and the −Y direction side of the holder 3 are wired and connected so that magnetic drive force in the same direction around the X axis is generated when the coil 603 is energized. Therefore, by energizing the coils 603 of these two sets of magnetic drive mechanisms 601 it is possible to correct the runout around the X axis. Further, the two sets of magnetic drive mechanisms 601 located on the + X direction side and the −X direction side of the holder 3 are connected by wiring so as to generate a magnetic drive force in the same direction around the Y axis when the coil 603 is energized. There is. Therefore, by energizing the coils 603 of these two sets of magnetic drive mechanisms 601 it is possible to correct the runout around the Y axis.

The spring member 7 is arranged at the end of the holder main body 310 in the −Z direction, and connects the holder 3 and the fixed body 4. The posture of the holder 3 and the optical module 1 fixed to the holder 3 when the swing magnetic drive mechanism 6 is not driven and is in a stationary state is determined by the spring member 7. The spring member 7 is a rectangular frame-shaped leaf spring formed by processing a metal plate. The fixed body side connecting portion 701 provided on the outer peripheral portion of the spring member 7 is fixed to the inner peripheral side of the second case 420 of the fixed body 4. Further, the movable body side connecting portion 702 provided on the inner peripheral portion of the spring member 7 is fixed to the fixing convex portion 313 provided on the outer peripheral surface of the holder main body portion 310, and the fixed body side connecting portion 701 and the movable body side connecting portion 702 are fixed. Are connected by an arm portion 703.

(Optical unit runout correction)
As described above, the optical unit 100 includes a swing magnetic drive mechanism 6 which is a runout correction unit that performs runout correction around the X axis and runout correction around the Y axis. Therefore, by assembling the optical module 1 so that the X-axis direction and the Y-axis direction are orthogonal to the optical axis direction L of the optical module 1, the shake correction in the pitching (pitch) direction and the yawing (roll) direction is performed. It can be performed. Further, since the rolling magnetic drive mechanism 40 is incorporated in the optical module 1, rolling correction can be performed. The optical unit 100 includes a runout detection sensor such as a gyroscope, and the runout detection sensor detects runouts around three orthogonal axes, and the swing magnetic drive mechanism 6 and rolling magnetism cancel the detected runouts. The drive mechanism 40 is driven. Alternatively, even if the control unit of the optical device main body drives the swing magnetic drive mechanism 6 and the rolling magnetic drive mechanism 40 based on the signal of the runout detection sensor mounted on the optical device main body on which the optical unit 100 is mounted. good.

(Main action and effect of this form)
As described above, in the optical module 1 of the present embodiment, the camera module 10 in which the optical element 2 is held by the lens barrel portion 50 is rotated around the optical axis. Therefore, as compared with the conventional configuration in which the entire optical module is rotated, the rotating portion is small and lightweight, so that it can be rotated with a small force. Therefore, the rolling magnetic drive mechanism 40 can be miniaturized. Therefore, the optical module 1 that performs rolling correction can be miniaturized, and it is not necessary to provide a rolling correction mechanism on the outside of the optical module 1. Therefore, it is possible to suppress an increase in the size of the optical unit 100 that performs rolling correction. Further, since the rotating portion is small and lightweight, the response to the driving force applied from the rolling magnetic drive mechanism 40 is good.

The optical module 1 of the present embodiment rotatably supports the end portion of the lens barrel portion 50 on the subject side by the rolling support mechanism 30. The center of gravity of the camera module 10 is located near the end of the lens barrel portion 50 on the subject side in which the heavy optical element 2 is held. Therefore, since the lens barrel portion 50 can be supported at a position close to the center of gravity, the camera module 10 can be stably supported. In addition, damage due to external force at the time of impact can be suppressed. If the center of gravity of the camera module 10 and the position of the rolling support mechanism 30 on the optical axis are aligned with each other, the camera module 10 can be supported more stably. Further, since the rolling support mechanism 30 is a ball bearing, it is possible to suppress an increase in the rotational load due to friction or the like.

In this embodiment, of the magnet 41 and the coil 42 constituting the rolling magnetic drive mechanism 40, the magnet is fixed to the magnet holding portion 53 provided in the lens barrel portion 50, and the coil 42 is fixed to the support 20. Therefore, since it is not necessary to provide a component for supplying power to the coil 42 on the lens barrel portion 50 side, wiring to the camera module 10 including the lens barrel portion 50 can be simplified. Further, since the magnet 41 and the coil 42 are provided on the outer peripheral side of the lens barrel portion 50, it is possible to suppress an increase in the dimension of the optical module 1 in the optical axis direction L.

In this embodiment, the magnetic sensor 43 is arranged at a position facing the magnetizing polarization line of the magnet 41, the origin position is detected based on the output of the magnetic sensor 43, and the rolling magnetic drive mechanism 40 is controlled. Therefore, since it is not necessary to provide a spring for returning to the origin position, it is possible to eliminate the swing back when returning to the origin position. Further, since it is not necessary to secure a space for providing the spring, it is advantageous for miniaturization.

In this embodiment, the optical unit 100 on which the optical module 1 is mounted includes a runout correction unit that corrects runout around an axis orthogonal to the optical axis direction L. As described above, if the optical unit 100 is provided with a runout correction unit, a rolling correction function can be added simply by mounting the optical module 1 on the optical unit 100. Further, in the optical module 1 of this embodiment, the rolling magnetic drive mechanism 40 is small. Therefore, it is possible to suppress the increase in size of the optical unit 100 provided with the rolling correction mechanism.

The optical unit 100 of the present embodiment swings the optical module 1 in the first direction (X-axis direction) and the second direction (Y-axis direction) orthogonal to the optical axis direction L as a shake correction unit. The drive mechanism 6 is used. The optical module 1 has swing support portions 501 and 502 arranged at angular positions between the first direction (X-axis direction) and the second direction (Y-axis direction), and the swing support portion 5.
It is supported by a gimbal mechanism 5 comprising a movable frame 503 supported by 01, 502. Therefore, the swing support portion of the gimbal mechanism 5 can be arranged by utilizing the space between the angular positions (X-axis direction and Y-axis direction) in which the swing magnetic drive mechanism 6 is arranged. Therefore, the optical unit 100 can be miniaturized.

(Modification example)
(1) The rolling magnetic drive mechanism 40 of the above-described embodiment is arranged on both sides of the lens barrel portion 50 in the X-axis direction, but only one set of the rolling magnetic drive mechanism 40 may be used. Further, the number of sets of the rolling magnetic drive mechanism 40 may be three or more. For example, the rolling magnetic drive mechanism 40 may be arranged on the + Y direction side and the −Y direction side of the lens barrel portion 50.

(2) The arrangement of the magnet 41 and the coil 42 constituting the rolling magnetic drive mechanism 40 may be reversed.

(3) The rolling support mechanism 30 of the above embodiment is a ball bearing, but a rotary bearing portion other than the ball bearing can also be used. For example, plain bearings can be used. The slide bearing may be a contained metal bearing, or may have a surface of a resin bearing member coated with fluorine. By using a slide bearing, weight reduction and cost reduction can be achieved.

(4) The rolling support mechanism 30 of the above embodiment is arranged at the end of the lens barrel portion 50 on the subject side (+ Z direction), but in the embodiment of the optical module to which the present invention is applied, the lens barrel portion it supports the camera module 10 at two points by adding the rotational bearing on the end of the 50 image side (-Z direction). By doing so, since the lens barrel portion 50 can be supported at two locations separated in the optical axis direction L, the camera module 10 can be supported without rattling, and the tilt of the lens barrel portion can be suppressed. .. In this case, it is desirable to use a ball bearing as the rotary bearing portion on the subject side (+ Z direction) near the center of gravity and a slide bearing as the rotary bearing portion on the image side (−Z direction).

(5) In the above embodiment, the origin position of rolling is detected by the magnetic sensor 43, but a spring member for returning to the origin position may be provided between the lens barrel portion 50 and the support 20 without using the magnetic sensor 43. can.

(6) When incorporating the optical module 1 into the optical unit 100, it is desirable to configure it so as to avoid magnetic interference between the swing magnetic drive mechanism 6 and the rolling magnetic drive mechanism 40. For example, the rolling magnetic drive mechanism 40 can be provided at a position different from the angular position where the swing magnetic drive mechanism 6 is provided.

(Other embodiments)
The optical unit 100 of the above embodiment swings the optical module 1 using a swinging magnetic drive mechanism to perform pitching correction and yawing correction. Instead of performing such mechanical correction, an image is taken by the optical module 1. It is also possible to perform runout correction by electronic correction that performs correction processing on the image. That is, image processing is performed on the captured image by the optical module 1 so as to cancel the tilt of the captured image due to the shake around the axis intersecting the optical axis (that is, the shake in the pitching direction and the yawing direction). The electronic correction unit that performs this processing may be mounted on the optical unit 100, or the control unit of the optical device on which the optical unit 100 is mounted may include the electronic correction unit.

By doing so, it is not necessary to provide a swing mechanism for performing pitching correction and yawing correction, so that the optical unit 100 can be further miniaturized. The runout correction (pitching correction and yawing correction) around the axis orthogonal to the optical axis direction L generally has a smaller correction angle than the rolling correction. Therefore, even if electronic correction is performed, there is little possibility that a decrease in the effective image area or an increase in current consumption becomes a problem. Therefore, the pitching correction and the yawing correction, in which the power consumption of the electronic correction is relatively small, are performed by the electronic correction, and the rolling correction, in which the power consumption of the electronic correction is large, is performed by the mechanical correction. Can be suppressed from increasing.

1 ... Optical module, 2 ... Optical element, 3 ... Holder, 4 ... Fixed body, 5 ... Gimbal mechanism, 6 ... Magnetic drive mechanism for rocking, 7 ... Spring member, 10 ... Camera module, 20 ... Support, 21 ... Front Plate, 22 ... Body, 23 ... Circular opening, 30 ... Rolling support mechanism, 31 ... Outer ring, 32 ... Inner ring, 33 ... Sphere, 34 ... Seal plate, 40 ... Rolling magnetic drive mechanism, 41 ... Magnet, 42 ... Coil, 43 ... Magnetic sensor, 50 ... Lens tube part, 51 ... Cylindrical part, 52 ... Flange part, 53 ... Magnet holding part, 54 ... Step part, 55 ... Cylindrical part, 56 ... Large diameter part, 60 ... Substrate, 100 ... Optical unit, 221, 222, 223, 224 ... Side plate, 301, 302, 303, 304 ... Wall part, 310 ... Holder body part, 312 ... Stopper, 313 ... Fixing convex part, 401, 402, 403 , 404 ... side plate, 410 ... first case, 411 ... body, 412 ... end plate, 413 ... window, 420 ... second case, 421 ... first member, 422 ... second member, 501 ... first swing Support part, 502 ... Second swing support part, 503 ... Movable frame, 504 ... Support point part, 505 ... Connecting part, 531, 532, 533, 534 ... Wall part, 601 ... Magnetic drive mechanism, 602 ... Magnet, 603 ... Coil, 701 ... Fixed body side connecting part, 702 ... Movable body side connecting part, 703 ... Arm part, L ... Optical axis direction, R1 ... First axis line, R2 ... Second axis line

Claims (7)

The optical element, the lens barrel portion that holds the optical element, the support, and the lens barrel portion that is fixed to the lens barrel portion and rotatably supports the support body around the optical axis of the optical element. It has a rolling support mechanism and a rolling magnetic drive mechanism that rotates the lens barrel around the optical axis.
The rolling magnetic drive mechanism includes a magnet and a coil, one of the magnet and the coil is fixed to the lens barrel portion, and the other is fixed to the support .
The rolling support mechanism is an optical module characterized by being provided at two locations, an end portion of the lens barrel portion on the subject side and an end portion on the image side of the lens barrel portion. The rotary bearing portion is a ball bearing.
The optical module according to claim 1 , wherein the inner ring of the ball bearing is fixed to the lens barrel portion, and the outer ring of the ball bearing is fixed to the support. The lens barrel portion includes a magnet holding portion to which the magnet is fixed.
The optical module according to any one of claims 1 or 2 , wherein the coil is fixed to the support. It has a magnetic sensor located at a position facing the magnetizing polarization line of the magnet, and has a magnetic sensor.
The optical module according to any one of claims 1 to 3 , wherein the rolling magnetic drive mechanism is controlled based on an origin position detected based on the output of the magnetic sensor. The optical module according to any one of claims 1 to 4.
An optical unit comprising: a runout correction unit for correcting runout around an axis intersecting the optical axis of the optical module. The shake correction unit is a swing magnetic drive mechanism that swings the optical module in the first direction and the second direction intersecting the optical axis.
The optical module is supported by a gimbal mechanism including a swing support portion arranged at an angular position between the first direction and the second direction, and a movable frame supported by the swing support portion. The optical unit according to claim 5. 5. The fifth aspect of the present invention is that the shake correction unit is an electronic correction unit that performs correction processing on an image captured by the optical module corresponding to shake around an axis intersecting the optical axis of the optical module. The optical unit described in.

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