Optical Unit

Abstract

To provide an optical unit including a plurality of spring parts for connecting a movable body with a holding body for holding the movable body so as to rotate around the optical axis of a camera module, capable of easily manufacturing a leaf spring constituting the spring part even when miniaturizing the spring part while preventing the spring part from being plastically deformed when a shock in the optical axis direction is applied to the optical unit, and easily handling the leaf spring when handling the leaf spring constituting the spring part as a single component.SOLUTION: In an optical unit, a spring part 43 for connecting a movable body with a holding body includes: a first flat leaf spring 6 elastically deformed in the rotation direction of the movable body to the holding body; and second flat leaf springs 7a and 8a elastically deformed in the optical axis direction. The first leaf spring 6 and the second leaf springs 7a and 8a are independently formed, and the first leaf spring 6 is fixed to the second leaf springs 7a and 8a.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to an optical unit with a shake correction function that is mounted on a portable device or the like. [Background technology]

[0002] Conventionally, optical units with a shake correction function mounted on portable devices and the like are known (see, for example, Patent Document 1). The optical unit described in Patent Document 1 includes a movable body having an optical module, a fixed body that holds the movable body in a displaceable state, a rolling drive mechanism that drives the movable body around the optical axis of the optical module relative to the fixed body, and a rolling support mechanism that supports the movable body rotatably around the optical axis relative to the fixed body. The rolling support mechanism is a leaf spring. The leaf spring is composed of a first elastic part that is elastically deformable in the direction around the optical axis, and a second elastic part that is elastically deformable in the optical axis direction.

[0003] In the optical unit described in Patent Document 1, the first elastic part rises at a right angle from the tip of the second elastic part, and the leaf spring is formed in an L shape. The leaf spring is formed by bending the boundary between the first elastic part and the second elastic part at 90°, and the first elastic part and the second elastic part are formed from a single spring material. In the optical unit described in Patent Document 1, the second elastic part that can be elastically deformed in the optical axis direction is connected to the first elastic part, so that even if an impact in the optical axis direction is applied to the optical unit, plastic deformation of the first elastic part can be prevented. That is, in the optical unit described in Patent Document 1, even if an impact in the optical axis direction is applied to the optical unit, plastic deformation of the leaf spring can be prevented. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2020-34840 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the optical unit described in Patent Document 1, the leaf spring is formed in an L-shape composed of a first elastic part elastically deformable in the direction around the optical axis and a second elastic part elastically deformable in the optical axis direction, so that, as described above, even if an impact in the optical axis direction is applied to the optical unit, it is possible to prevent the leaf spring from being plastically deformed. On the other hand, when the leaf spring is formed in an L-shape, if the leaf spring is downsized to downsize the optical unit, bending the leaf spring becomes difficult, and the manufacturing of the leaf spring may become difficult. In addition, if the downsized leaf spring is formed in an L-shape, unexpected plastic deformation is likely to occur in the leaf spring when the leaf spring is handled as a single component, so that handling of the leaf spring when the leaf spring is handled as a single component becomes cumbersome.

[0006] Therefore, the object of the present invention is to provide an optical unit that includes a movable body having a camera module, a holder that holds the movable body so that it can be rotated around the optical axis of the camera module, and a plurality of spring portions connecting the movable body and the holder, which is capable of preventing plastic deformation of the leaf spring that constitutes the spring portion when an impact is applied to the optical unit in the optical axis direction, while allowing the leaf spring that constitutes the spring portion to be easily manufactured even if the spring portion is miniaturized, and allows the leaf spring that constitutes the spring portion to be easily handled when handled as a single component. [Means for solving the problem]

[0007] In order to solve the above problems, the optical unit of the present invention includes: a movable body having a camera module; The movable body can be rotated around the optical axis of the camera module. Movable body On the inner circumference A holder for holding the The actuator has a magnet and a coil. The camera includes a rotation mechanism that rotates a movable body relative to a holder around an optical axis of the camera module as a rotation center, and a plurality of springs that connect the movable body and the holder, the holding body comprises a first intermediate member which rotatably holds the movable body, a second intermediate member which rotatably holds the first intermediate member, and a fixed body which rotatably holds the second intermediate member, the movable body being rotatable relative to the first intermediate member around the optical axis of the camera module as the center of rotation, the first intermediate member being rotatable relative to the second intermediate member about a first direction which intersects with the optical axis of the camera module, the second intermediate member being rotatable relative to the fixed body about a second direction which intersects with the first direction and with the optical axis of the camera module as the axis of rotation, first fulcrum portions which serve as fulcrums for the rotation of the first intermediate member relative to the second intermediate member are arranged at both ends of the first intermediate member in the first direction, and second fulcrum portions which serve as fulcrums for the rotation of the second intermediate member relative to the fixed body are arranged at both ends of the second intermediate member in the second direction;the spring portion includes a first flat leaf spring that is elastically deformable in a rotational direction of the movable body relative to the holder, and a second flat leaf spring that is connected to an end of the first leaf spring in an optical axis direction that is the direction of the optical axis of the camera module and is elastically deformable in the optical axis direction; when viewed from the optical axis direction, the support is disposed at a position shifted from the first support portion and the second support portion in a circumferential direction centered on the optical axis of the camera module; The first leaf spring and the second leaf spring are formed as separate bodies, and the first leaf spring and the second leaf spring formed as separate bodies are fixed to each other. The spring portion includes a second leaf spring arranged on one side of the first leaf spring in the optical axis direction and having a base end fixed to the movable body, and a second leaf spring arranged on the other side of the first leaf spring in the optical axis direction and having a base end fixed to the holder, one end of the first leaf spring in the optical axis direction is fixed to a tip portion of the second leaf spring fixed to the movable body, and the other end of the first leaf spring in the optical axis direction is fixed to a tip portion of the second leaf spring fixed to the holder, or the spring portion is arranged on one side of the first leaf spring in the optical axis direction and The spring portion includes a second leaf spring having a base end fixed to the movable body, one end of the first leaf spring in the optical axis direction being fixed to a tip end of the second leaf spring fixed to the movable body, and the other end of the first leaf spring in the optical axis direction being fixed to the holder; alternatively, the spring portion includes a second leaf spring arranged on the other side of the first leaf spring in the optical axis direction and having a base end fixed to the holder, one end of the first leaf spring in the optical axis direction being fixed to the movable body, and the other end of the first leaf spring in the optical axis direction being fixed to a tip end of the second leaf spring fixed to the holder. It is characterized by:

[0008] In the optical unit of the present invention, the spring portion connecting the movable body and the holder includes a flat first leaf spring that is elastically deformable in the direction of rotation of the movable body relative to the holder, and a flat second leaf spring to which an end of the first leaf spring in the optical axis direction is connected and that is elastically deformable in the optical axis direction. Therefore, in the present invention, when an impact is applied to the optical unit in the optical axis direction, it is possible to elastically deform the second leaf spring, and as a result, it is possible to prevent plastic deformation of the first leaf spring. In other words, in the present invention, when an impact is applied to the optical unit in the optical axis direction, it is possible to prevent plastic deformation of the leaf spring constituting the spring portion.

[0009] In addition, in the present invention, the flat first leaf spring and the flat second leaf spring are formed separately, and the first leaf spring and the second leaf spring formed separately are fixed to each other. Therefore, in the present invention, when manufacturing the first leaf spring and the second leaf spring, it is not necessary to perform bending processing of the first leaf spring and the second leaf spring. Therefore, in the present invention, even if the spring part is made small, the first leaf spring and the second leaf spring constituting the spring part can be easily manufactured. In addition, in the present invention, since it is sufficient to handle the flat first leaf spring and the flat second leaf spring as individual parts, the first leaf spring and the second leaf spring are less likely to deform when handling the first leaf spring and the second leaf spring as individual parts. Therefore, in the present invention, even if the spring part is made small, the first leaf spring and the second leaf spring can be easily handled when handling the first leaf spring and the second leaf spring constituting the spring part as individual parts. Also, in the present invention, the holding body includes a first intermediate member that rotatably holds the movable body, a second intermediate member that rotatably holds the first intermediate member, and a fixed body that rotatably holds the second intermediate member, the movable body being rotatable relative to the first intermediate member with the optical axis of the camera module as the center of rotation, the first intermediate member being rotatable relative to the second intermediate member with a first direction that intersects with the optical axis of the camera module as the axis of rotation, and the second intermediate member being rotatable relative to the second intermediate member with a first direction that intersects with the optical axis of the camera module as the axis of rotation, The first intermediate member is rotatable relative to the fixed body with a second direction intersecting the axis as the axial direction of rotation, and a first fulcrum portion is arranged at both ends of the first intermediate member in the first direction, which serves as a fulcrum for rotation of the first intermediate member relative to the second intermediate member, and a second fulcrum portion is arranged at both ends of the second intermediate member in the second direction, which serves as a fulcrum for rotation of the second intermediate member relative to the fixed body, and the spring portion is arranged at a position shifted from the first fulcrum portion and the second fulcrum portion in the circumferential direction centered on the optical axis of the camera module when viewed from the optical axis direction. Therefore, when viewed from the optical axis direction, the first fulcrum portion, the second fulcrum portion and the spring portion are arranged at the same position in the circumferential direction centered on the optical axis of the camera module, and it is possible to make the optical unit smaller in the radial direction centered on the optical axis of the camera module compared to a case where the spring portion is arranged on the outside or inside of the first fulcrum portion and the second fulcrum portion in the radial direction centered on the optical axis of the camera module.

[0010] In the present invention, the optical unit includes, for example, four spring portions, which are arranged at a pitch of approximately 90° around the optical axis of the camera module.

[0011] In the present invention, the spring portion is disposed on one side of the first leaf spring in the optical axis direction and has a movable base end. On the body a second leaf spring that is fixed to the first leaf spring and that is disposed on the other side of the first leaf spring in the optical axis direction and has a base end Guaranteed Hold On the body It is preferable that the optical unit further includes a first leaf spring and a second leaf spring fixed to the movable body, one end of the first leaf spring in the optical axis direction is fixed to a tip of the second leaf spring fixed to the movable body, and the other end of the first leaf spring in the optical axis direction is fixed to a tip of the second leaf spring fixed to the holding body. With this configuration, when an impact is applied to the optical unit in the optical axis direction, it is possible to elastically deform the second leaf spring on both sides of the first leaf spring in the optical axis direction. Therefore, it is possible to effectively prevent plastic deformation of the first leaf spring when an impact is applied to the optical unit in the optical axis direction.

[0012] In the present invention , No. It is preferable that a slit-shaped notch is formed at the tip of the second leaf spring, into which the end of the first leaf spring in the optical axis direction is inserted. With this configuration, the notch can be used to easily position the first leaf spring relative to the second leaf spring, and the notch can be used to temporarily fix the first leaf spring to the second leaf spring. This makes it easy to fix the end of the first leaf spring to the tip of the second leaf spring.

[0013] In the present invention, the optical unit includes a connecting portion that connects the second leaf springs arranged on one side in the optical axis direction, and the connecting portion is formed in a flat plate shape arranged on the same plane as the second leaf springs arranged on one side in the optical axis direction, and the second leaf springs arranged on one side in the optical axis direction and the connecting portion are preferably formed integrally. With this configuration, the second leaf springs arranged on one side in the optical axis direction can be handled more easily than when the second leaf springs arranged on one side in the optical axis direction are separated. Also, with this configuration, the second leaf springs can be fixed more easily than when the second leaf springs arranged on one side in the optical axis direction are separated.

[0014] Even in this case, the connecting portion is formed in a flat plate shape arranged on the same plane as the multiple second leaf springs arranged on one side in the optical axis direction, and the leaf spring in which the multiple second leaf springs and the connecting portion are integrated is flat. This makes it possible to easily manufacture the leaf spring in which the multiple second leaf springs and the connecting portion are integrated, and also makes it easy to handle the leaf spring in which the multiple second leaf springs and the connecting portion are integrated as a single component.

[0015] In the present invention, the first leaf spring preferably includes a fixed portion fixed to the second leaf spring, and a meandering portion connected to the fixed portion and extending in the optical axis direction while meandering, and the shape of the meandering portion when viewed from the thickness direction of the first leaf spring is a wave shape composed of a plurality of straight portions and a plurality of arc portions. With this configuration, when an impact is applied to the optical unit, stress is less likely to concentrate at the connection portion between the first leaf spring and the second leaf spring. Therefore, even if the first leaf spring and the second leaf spring are formed separately and fixed to each other, it is possible to prevent damage to the connection portion between the first leaf spring and the second leaf spring when an impact is applied to the optical unit. Effect of the Invention

[0018] As described above, in the present invention, in an optical unit comprising a movable body having a camera module, a holder that holds the movable body so that it can be rotated around the optical axis of the camera module, and a plurality of spring portions connecting the movable body and the holder, when an impact is applied to the optical unit in the optical axis direction, it is possible to prevent plastic deformation of the leaf spring that constitutes the spring portion, while even if the spring portion is miniaturized, the leaf spring that constitutes the spring portion can be easily manufactured, and the leaf spring that constitutes the spring portion can be easily handled when handling the leaf spring as a single component. [Brief description of the drawings]

[0019] [Figure 1] 1 is a perspective view of an optical unit according to an embodiment of the present invention. [Diagram 2] 2 is a plan view of the optical unit shown in FIG. 1 with a cover member removed. [Diagram 3] FIG. 2 is an exploded perspective view of the optical unit shown in FIG. [Figure 4] 4 is an exploded perspective view of the rotation mechanism, the second intermediate member, the case body, etc. shown in FIG. 3. [Diagram 5] 5 is an exploded perspective view of a first intermediate member, a holder, and the like shown in FIG. 4. [Figure 6] FIG. 6 is an enlarged view of part E in FIG. 5. [Figure 7] FIG. 7 is a side view of the leaf spring shown in FIG. 6. [Figure 8] FIG. 7 is a plan view of the leaf spring shown in FIG. 6. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0021] (Overall configuration of optical unit) FIG. 1 is a perspective view of an optical unit 1 according to an embodiment of the present invention. FIG. 2 is a plan view of the optical unit 1 shown in FIG. 1 with a cover member 25 removed. FIG. 3 is an exploded perspective view of the optical unit 1 shown in FIG. 1. FIG. 4 is an exploded perspective view of the rotating mechanism 5, the second intermediate member 11, the case body 24, and the like shown in FIG. 3. FIG. 5 is an exploded perspective view of the first intermediate member 10, the holder 20, and the like shown in FIG. 4. In the following description, as shown in FIG. 1 and the like, three mutually orthogonal directions are defined as the X direction, the Y direction, and the Z direction, respectively, and the X direction is defined as the left-right direction, the Y direction is defined as the front-rear direction, and the Z direction is defined as the up-down direction. Also, the Z1 direction side in FIG. 1 and the like is defined as the "upper" side, and the Z2 direction side is defined as the "lower" side.

[0022] The optical unit 1 of this embodiment is a small and thin unit mounted on a mobile device such as a smartphone, and includes a camera module 2 having a lens for shooting and an image sensor. The optical unit 1 includes a shake correction function for preventing a captured image from being distorted when a shake occurs during shooting. The optical unit 1 is formed into a thin, flat rectangular parallelepiped shape as a whole. The thickness of the optical unit 1 is, for example, about 3 to 4 mm. The optical unit 1 of this embodiment is formed so that the shape when viewed from the optical axis direction, which is the direction of the optical axis L of the camera module 2, is substantially square. The four side surfaces of the optical unit 1 are parallel to the ZX plane consisting of the left-right direction and the up-down direction or the YZ plane consisting of the front-rear direction and the up-down direction.

[0023] The optical unit 1 includes a movable body 3 having a camera module 2, a holder 4 that holds the movable body 3, a rotation mechanism 5 that rotates the movable body 3 relative to the holder 4 around the optical axis L of the camera module 2 as the rotation center, and leaf springs 6 to 8 for connecting the movable body 3 and the holder 4. The holder 4 includes a first intermediate member 10 that rotatably holds the movable body 3, a second intermediate member 11 that rotatably holds the first intermediate member 10, and a fixed body 12 that rotatably holds the second intermediate member 11. The movable body 3 is rotatable relative to the first intermediate member 10 around the optical axis L of the camera module 2 as the rotation center.

[0024] The first intermediate member 10 is rotatable relative to the second intermediate member 11 with a first direction (V direction in FIG. 2, etc.) intersecting with the optical axis L of the camera module 2 as a rotation axis direction. That is, the first intermediate member 10 is rotatable relative to the second intermediate member 11 with a first axis L1 (see FIG. 2) having the first direction as an axial direction as a rotation center. The first direction in this embodiment is perpendicular to the optical axis L. The second intermediate member 11 is rotatable relative to the fixed body 12 with a second direction (W direction in FIG. 2, etc.) intersecting with the first direction and the optical axis L of the camera module 2 as a rotation axis direction as a rotation axis direction. That is, the second intermediate member 11 is rotatable relative to the fixed body 12 with a second axis L2 (see FIG. 2) having the second direction as an axial direction as a rotation center as a rotation axis direction. The second direction in this embodiment is perpendicular to the first direction. In this manner, a gimbal mechanism is configured between the movable body 3 and the fixed body 12.

[0025] In this embodiment, the optical axis direction of the camera module 2 when the first intermediate member 10 and the second intermediate member 11 are disposed at a predetermined reference position coincides with the vertical direction. In addition, when the first intermediate member 10 is disposed at a predetermined reference position, the second direction is perpendicular to the optical axis L. That is, when the first intermediate member 10 is disposed at a predetermined reference position and does not rotate with respect to the second intermediate member 11, the second direction is perpendicular to the optical axis L. On the other hand, when the first intermediate member 10 rotates with respect to the second intermediate member 11, the second direction intersects with the optical axis L but does not intersect at a right angle. When viewed from the vertical direction, the first direction is a direction shifted by about 55° in the counterclockwise direction (counterclockwise direction) of FIG. 2 with respect to the front-rear direction. When viewed from the vertical direction, the second direction is a direction shifted by about 55° in the counterclockwise direction of FIG. 2 with respect to the left-right direction.

[0026] A first fulcrum portion 15 that serves as a fulcrum for rotation of the first intermediate member 10 relative to the second intermediate member 11 is disposed at both ends of the first intermediate member 10 in the first direction. A second fulcrum portion 16 that serves as a fulcrum for rotation of the second intermediate member 11 relative to the fixed body 12 is disposed at both ends of the second intermediate member 11 in the second direction. The optical unit 1 also includes a rotation mechanism 17 that rotates the movable body 3 relative to the holder 4 around at least one of the first axis L1 and the second axis L2 as the rotation center.

[0027] The movable body 3 is formed in a flat rectangular parallelepiped shape with a thin thickness in the optical axis direction. The movable body 3 includes a holder 20 to which the camera module 2 is fixed. The holder 20 is formed of a resin material. The holder 20 is formed in a substantially square frame shape. The upper end surface of the holder 20 is a flat surface perpendicular to the optical axis direction. The camera module 2 is fixed to the inner peripheral surface of the holder 20 so that the outer peripheral side of the camera module 2 is covered by the holder 20. As described above, the camera module 2 includes a lens and an imaging element. The imaging element is disposed on the lower end side of the camera module 2, and a subject disposed on the upper side of the camera module 2 is photographed by the camera module 2. A flexible printed circuit board 21 is drawn out from the lower end side of the camera module 2.

[0028] The first intermediate member 10 is composed of a frame member 22 and a cover plate 23 fixed to the frame member 22. The frame member 22 is formed of a metal material such as stainless steel. The frame member 22 includes a base portion 22a disposed on the lower side of the holder 20, two rising portions 22b rising upward from the base portion 22a, and two rising portions 22c rising upward from the base portion 22a. The base portion 22a is formed in a substantially square frame shape. The base portion 22a is formed in a flat plate shape. The lower surface of the base portion 22a is a plane perpendicular to the optical axis direction. The rising portions 22b and 22c are formed in a substantially rectangular flat plate shape. The rising portions 22b and 22c rise upward from each of the four corners of the base portion 22a formed in a substantially square frame shape. The thickness direction of the rising portions 22b coincides with the first direction, and the thickness direction of the rising portions 22c coincides with the second direction.

[0029] The cover plate 23 is made of a metal material such as stainless steel. The cover plate 23 is formed in a substantially square frame shape. The cover plate 23 is formed in a flat plate shape. The cover plate 23 is fixed to the upper end surfaces of the rising portions 22b and 22c. The holder 20 is disposed between the base portion 22a and the cover plate 23 in the vertical direction. The holder 20 is disposed inside the rising portions 22b and 22c in the radial direction centered on the optical axis L.

[0030] The second intermediate member 11 is formed of a metal material such as stainless steel. The second intermediate member 11 is formed by bending a metal plate having spring properties into a predetermined shape. The second intermediate member 11 is composed of a base 11a disposed above the first intermediate member 10, two arms 11b extending from the base 11a toward both sides in the first direction, and two arms 11c extending from the base 11a toward both sides in the second direction. The base 11a is formed in a circular frame shape. The upper end of the camera module 2 is disposed on the inner periphery of the base 11a.

[0031] As shown in FIG. 4, the tip side of the arm portion 11b is bent downward. The tip portion 11d of the arm portion 11b is formed in a flat plate shape. The thickness direction of the tip portion 11d approximately coincides with the first direction. The tip portion 11d is disposed outside the rising portion 22b in the first direction. The tip side of the arm portion 11c is bent downward. The tip portion 11e of the arm portion 11c is formed in a flat plate shape. The thickness direction of the tip portion 11e approximately coincides with the second direction. The tip portion 11e is disposed outside the rising portion 22c in the second direction.

[0032] The tip portion 11d is formed with a recess 11f in which a part of a sphere 27 (described below) constituting a part of the first fulcrum portion 15 is disposed (see FIG. 4). The recess 11f is formed in a semi-spherical shape. The recess 11f is recessed inward in the first direction. The tip portion 11e is formed with a recess 11g in which a part of a sphere 29 (described below) constituting a part of the second fulcrum portion 16 is disposed (see FIG. 4). The recess 11g is formed in a semi-spherical shape. The recess 11g is recessed inward in the second direction.

[0033] The fixed body 12 includes a frame-shaped case body 24 arranged outside the movable body 3, the first intermediate member 10, and the second intermediate member 11 in the radial direction centered on the optical axis L, and a cover member 25 that covers the case body 24. The case body 24 is formed of a resin material. The case body 24 is formed in a substantially rectangular cylindrical shape. When viewed from the top and bottom, the case body 24 has a substantially square frame shape. The cover member 25 constitutes the upper surface and side surfaces of the optical unit 1. A through hole is formed in the upper surface of the cover member 25, in which the second intermediate member 11 and the like are arranged.

[0034] The first fulcrum portion 15 includes a support member 26 fixed to the rising portion 22b of the first intermediate member 10, and a spherical sphere 27 fixed to the support member 26 (see FIG. 4). The support member 26 and the sphere 27 are made of a metal material. The support member 26 includes a flat fixing portion 26a to which the sphere 27 is fixed. The thickness direction of the fixing portion 26a coincides with the first direction. The sphere 27 is fixed to the inner surface of the fixing portion 26a in the first direction. The sphere 27 is fixed, for example, by welding to the fixing portion 26a. The fixing portion 26a is disposed outside the rising portion 22b in the first direction. The tip portion 11d of the second intermediate member 11 is disposed between the rising portion 22b and the fixing portion 26a in the first direction. A part of the sphere 27 is disposed in the recess 11f. Due to the springiness of the arm 11b, the ball 27 comes into contact with the bottom surface of the recess 11f with a predetermined contact pressure.

[0035] The second fulcrum portion 16 includes a support member 28 fixed to the case body 24 and a spherical sphere 29 fixed to the support member 28 (see FIG. 4). The support member 28 and the sphere 29 are made of a metal material. The support member 28 includes a flat fixing portion 28a to which the sphere 29 is fixed. The thickness direction of the fixing portion 28a coincides with the second direction. The sphere 29 is fixed to the inner surface of the fixing portion 28a in the second direction. The sphere 29 is fixed, for example, by welding to the fixing portion 28a. The fixing portion 28a is disposed outside the tip portion 11e of the second intermediate member 11 in the second direction. A part of the sphere 29 is disposed in the recess 11g. Due to the springiness of the arm portion 11c, the sphere 29 contacts the bottom surface of the recess 11g with a predetermined contact pressure.

[0036] The rotation mechanism 5 includes a driving magnet 32 ​​fixed to a side surface of the holder 20, and a driving coil 33 arranged to face the driving magnet 32. The driving magnet 32 ​​is formed in a rectangular flat plate shape. The driving magnet 32 ​​is fixed to one side surface of the holder 20 in the left-right direction. The driving magnet 32 ​​is magnetized with two poles in the front-rear direction. The driving coil 33 is formed by winding a conductor wire in a substantially rectangular frame shape. The driving coil 33 is attached to a flexible printed circuit board 35. The flexible printed circuit board 35 is fixed to the outer peripheral surface of the case body 24. The driving magnet 32 ​​and the driving coil 33 face each other in the left-right direction.

[0037] The rotation mechanism 17 includes driving magnets 37 and 38 fixed to the side of the holder 20, a driving coil 39 arranged to face the driving magnet 37, and a driving coil 40 arranged to face the driving magnet 38. The driving magnets 37 and 38 are formed in a rectangular flat plate shape. The driving magnet 37 is fixed to the other side of the holder 20 in the left-right direction. The driving magnet 38 is fixed to one side of the holder 20 in the front-rear direction. The driving magnets 37 and 38 are magnetized with two poles in the up-down direction. The driving coils 39 and 40 are formed by winding a conductor in a substantially rectangular frame shape. The driving coils 39 and 40 are attached to the flexible printed circuit board 35. The driving magnet 37 and the driving coil 39 face each other in the left-right direction, and the driving magnet 38 and the driving coil 40 face each other in the front-rear direction.

[0038] A magnetic plate 34 (see FIG. 5) made of a magnetic material is disposed between the side surface of the holder 20 to which the drive magnet 32 ​​is fixed and the drive magnet 32. Similarly, a magnetic plate 34 is disposed between the side surface of the holder 20 to which the drive magnet 37 is fixed and the drive magnet 37, and a magnetic plate 34 is disposed between the side surface of the holder 20 to which the drive magnet 38 is fixed and the drive magnet 37. The magnetic plate 34 is fixed to the side surface of the holder 20.

[0039] A magnetic plate 41 (see FIG. 4) made of a magnetic material is fixed to the flexible printed circuit board 35. The magnetic plate 41 is fixed at two places, one on the surface of the flexible printed circuit board 35 opposite to the surface to which the driving coil 39 is fixed, and the other on the surface of the flexible printed circuit board 35 opposite to the surface to which the driving coil 40 is fixed. The positions of the first intermediate member 10 and the second intermediate member 11 arranged at the reference position are maintained by the magnetic attraction force generated between the driving magnet 37 and the magnetic plate 41 and the magnetic attraction force generated between the driving magnet 38 and the magnetic plate 41. That is, the magnetic plate 41 fulfills the function of maintaining the posture of the first intermediate member 10 and the second intermediate member 11 when no current is supplied to the driving coils 39 and 40.

[0040] In the optical unit 1, when a change in the inclination of the movable body 3 is detected by a predetermined detection mechanism for detecting a change in the inclination of the movable body 3, current is supplied to the drive coils 33, 39, 40 based on the detection result of the detection mechanism, and the shake is corrected.

[0041] (Leaf spring configuration) Fig. 6 is an enlarged view of a portion E in Fig. 5. Fig. 7 is a side view of the leaf spring 6 shown in Fig. 6. Fig. 8 is a plan view of the leaf spring 7 shown in Fig. 6.

[0042] The optical unit 1 of this embodiment includes four leaf springs 6, one leaf spring 7, and one leaf spring 8. The leaf spring 6 is made of a metal material. The leaf spring 6 of this embodiment is made of a copper alloy. The leaf spring 6 is formed in a flat plate shape with a thickness direction in a predetermined direction perpendicular to the optical axis direction. Specifically, the leaf spring 6 is formed in a flat plate shape with a thickness direction in the rotation direction of the movable body 3 relative to the holder 4 (i.e., the rotation direction of the movable body 3 with the optical axis L as the rotation center). The leaf spring 6 is elastically deformable in the rotation direction of the movable body 3 relative to the holder 4. Moreover, the leaf spring 6 is formed in a long and narrow flat plate shape in the optical axis direction as a whole. The thickness of the leaf spring 6 is, for example, about 20 to 40 μm. Moreover, the width of the leaf spring 6 is, for example, about 0.2 to 0.3 mm.

[0043] The four leaf springs 6 are arranged at a pitch of approximately 90° centered on the optical axis L. When the movable body 3 is arranged in the reference position, two of the four leaf springs 6 are arranged at positions shifted approximately 35° counterclockwise in Fig. 2 from the front-rear direction when viewed from the top-bottom direction, and the remaining two leaf springs 6 are arranged at positions shifted approximately 35° counterclockwise in Fig. 2 from the left-right direction when viewed from the top-bottom direction. Furthermore, the leaf springs 6 are arranged outside the movable body 3 and the first intermediate member 10 in the radial direction centered on the optical axis L.

[0044] The leaf spring 6 is composed of a fixed portion 6a fixed to a spring holding portion 7a (described later) constituting a part of the leaf spring 7, a fixed portion 6b fixed to a spring holding portion 8a (described later) constituting a part of the leaf spring 8, and a meandering portion 6c connected to the fixed portions 6a and 6b and extending in a meandering manner in the optical axis direction. The fixed portions 6a and 6b are formed in a straight line extending in the optical axis direction. The fixed portion 6a constitutes the upper end portion of the leaf spring 6, and the fixed portion 6b constitutes the lower end portion of the leaf spring 6. That is, the fixed portion 6a constitutes one end portion of the leaf spring 6 in the optical axis direction, and the fixed portion 6b constitutes the other end portion of the leaf spring 6 in the optical axis direction.

[0045] The meandering portion 6c is disposed between the fixed portion 6a and the fixed portion 6b. As shown in FIG. 7, the shape of the meandering portion 6c when viewed from the thickness direction of the leaf spring 6 is a wave shape composed of a plurality of straight portions 6d and a plurality of arc portions 6e. The straight portions 6d are formed in straight lines extending in the radial direction centered on the optical axis L. The arc portions 6e are formed in semicircular shapes and connect the straight portions 6d aligned in the optical axis direction. That is, the meandering portion 6c meanders in the radial direction centered on the optical axis L.

[0046] The leaf springs 7 and 8 are formed of a metal material. The leaf springs 7 and 8 of this embodiment are formed of the same copper alloy as the leaf spring 6. The leaf springs 7 and 8 are formed in a flat plate shape with the thickness direction being in the optical axis direction. The thickness of the leaf springs 7 and 8 is, for example, about 20 to 40 μm. The leaf springs 7 and 8 are formed in a substantially square frame shape as a whole. The leaf spring 7 is fixed to the upper end surface of the holder 20. The leaf spring 7 is disposed above the leaf spring 6. That is, the leaf spring 7 is disposed on one side of the leaf spring 6 in the optical axis direction. A gap is formed between the leaf spring 7 and the cover plate 23. The leaf spring 8 is fixed to the lower surface of the base 22a of the frame member 22. The leaf spring 8 is disposed below the leaf spring 6. That is, the leaf spring 8 is disposed on the other side of the leaf spring 6 in the optical axis direction.

[0047] The leaf spring 7 is composed of four spring holding parts 7a to which the fixed parts 6a of the leaf spring 6 are connected, and a connecting part 7b connecting the four spring holding parts 7a. That is, the four spring holding parts 7a and the connecting part 7b are integrally formed. That is, the four spring holding parts 7a and the connecting part 7b are manufactured together from a single metal plate, and the four spring holding parts 7a are integrated via the connecting part 7b. In addition, the four spring holding parts 7a and the connecting part 7b are arranged on the same plane. The four spring holding parts 7a protrude from the vicinity of the four corners of the leaf spring 7 formed in a substantially square frame shape toward the outer periphery of the leaf spring 7, and are arranged at a pitch of approximately 90° around the optical axis L.

[0048] When the movable body 3 is disposed at the reference position, two of the four spring holders 7a protrude in a direction shifted by about 35° counterclockwise in Fig. 2 from the front-rear direction when viewed from the top-bottom direction. Also, when the movable body 3 is disposed at the reference position, the remaining two spring holders 7a are disposed at positions shifted by about 35° counterclockwise in Fig. 2 from the left-right direction when viewed from the top-bottom direction.

[0049] The base end of the spring holding portion 7a is connected to the connecting portion 7b. The base end of the spring holding portion 7a and the connecting portion 7b are fixed to the upper end surface of the holder 20. That is, the base end of the spring holding portion 7a and the connecting portion 7b are fixed to the movable body 3. The spring holding portion 7a is elastically deformable in the optical axis direction. The spring constant of the spring holding portion 7a in the optical axis direction is significantly smaller than the spring constant of the leaf spring 6 in the optical axis direction. The width of the spring holding portion 7a gradually increases from the tip to the base end of the spring holding portion 7a.

[0050] The fixed portion 6a of the leaf spring 6 is fixed to the tip of the spring holding portion 7a. A slit-shaped notch 7c into which the fixed portion 6a is inserted is formed at the tip of the spring holding portion 7a. The notch 7c is formed from the tip of the spring holding portion 7a toward the base end. The fixed portion 6a is fixed to the spring holding portion 7a in a state where it is inserted into the notch 7c. In this embodiment, the fixed portion 6a is fixed to the spring holding portion 7a by soldering.

[0051] The leaf spring 8 is formed in the same shape as the leaf spring 7. The leaf spring 8 is composed of four spring holding parts 8a to which the fixed part 6b of the leaf spring 6 is connected, and a connecting part 8b connecting the four spring holding parts 8a. That is, the four spring holding parts 8a and the connecting part 8b are integrally formed. That is, the four spring holding parts 8a and the connecting part 8b are manufactured together from a single metal plate, and the four spring holding parts 8a are integrated via the connecting part 8b. In addition, the four spring holding parts 8a and the connecting part 8b are arranged on the same plane. The four spring holding parts 8a protrude from the vicinity of the four corners of the leaf spring 8 toward the outer periphery of the leaf spring 8, and are arranged at approximately 90° pitches centered on the optical axis L. When the movable body 3 is arranged at the reference position, the four spring holding parts 8a overlap with the four spring holding parts 8a in the vertical direction.

[0052] The base end of the spring holding portion 8a is connected to the connecting portion 8b. The base end of the spring holding portion 8a and the connecting portion 8b are fixed to the lower surface of the base portion 22a of the frame member 22. That is, the base end of the spring holding portion 8a and the connecting portion 8b are fixed to the holder 4. The spring holding portion 8a is elastically deformable in the optical axis direction. The spring constant of the spring holding portion 8a in the optical axis direction is equal to the spring constant of the spring holding portion 7a in the optical axis direction, and is significantly smaller than the spring constant of the leaf spring 6 in the optical axis direction. The width of the spring holding portion 8a gradually increases from the tip to the base end of the spring holding portion 8a.

[0053] The fixed portion 6b of the leaf spring 6 is fixed to the tip of the spring holding portion 8a. A slit-shaped notch 8c into which the fixed portion 6b is inserted is formed at the tip of the spring holding portion 8a (see FIG. 6). The notch 8c is formed from the tip of the spring holding portion 8a toward the base end. The fixed portion 6b is fixed to the spring holding portion 8a in a state where it is inserted into the notch 8c. In this embodiment, the fixed portion 6b is fixed to the spring holding portion 8a by soldering.

[0054] In this embodiment, the leaf spring 6, the spring holding portion 7a of the leaf spring 7, and the spring holding portion 8a of the leaf spring 8 constitute the spring portion 43 that connects the movable body 3 and the holding body 4. That is, the optical unit 1 has four spring portions 43. The leaf spring 6, the spring holding portion 7a, and the spring holding portion 8a are formed as separate bodies, and in the spring portion 43, the leaf spring 6, the spring holding portion 7a, and the spring holding portion 8a that are formed as separate bodies are fixed to each other. The four spring portions 43 are arranged at approximately 90° pitches centered on the optical axis L. In this specification, "the four spring portions 43 are arranged at approximately 90° pitches centered on the optical axis L" includes both a case where the four spring portions 43 are arranged at equal angular pitches of 90° centered on the optical axis L and a case where they are not arranged at equal angular pitches of 90°.

[0055] 2, the spring portion 43 is disposed at a position offset from the first fulcrum portion 15 and the second fulcrum portion 16 in the circumferential direction centered on the optical axis L when viewed from the optical axis direction. Also, the spring portion 43 is disposed at approximately the same position as the first fulcrum portion 15 and the second fulcrum portion 16 in the radial direction centered on the optical axis L when viewed from the optical axis direction. In this embodiment, the position of the movable body 3 disposed at the reference position is maintained by the spring portion 43 in the rotation direction of the movable body 3 relative to the holder 4. That is, the spring portion 43 fulfills the function of maintaining the attitude of the movable body 3 in the rotation direction of the movable body 3 relative to the holder 4 when no current is supplied to the driving coil 33.

[0056] The leaf spring 6 in this embodiment is a first leaf spring that is elastically deformable in the rotational direction of the movable body 3 relative to the holder 4. The spring holders 7a and 8a in this embodiment are second leaf springs that are connected to ends of the leaf spring 6 in the optical axis direction and are elastically deformable in the optical axis direction. Specifically, the spring holder 7a is a second leaf spring that is disposed on one side of the leaf spring 6 in the optical axis direction and has a base end fixed to the movable body 3, and the spring holder 8a is a second leaf spring that is disposed on the other side of the leaf spring 6 in the optical axis direction and has a base end fixed to the holder 4.

[0057] (Main effects of this form) As described above, in this embodiment, the spring portion 43 connecting the movable body 3 and the holder 4 is composed of the flat leaf spring 6 elastically deformable in the rotation direction of the movable body 3 relative to the holder 4, and the flat spring holders 7a, 8a to which the end of the leaf spring 6 in the optical axis direction is connected and elastically deformable in the optical axis direction. In this embodiment, the spring constant of the spring holders 7a, 8a in the optical axis direction is significantly smaller than the spring constant of the leaf spring 6 in the optical axis direction. Therefore, in this embodiment, when an impact is applied to the optical unit 1 in the optical axis direction, it is possible to elastically deform the spring holders 7a, 8a, and as a result, it is possible to prevent plastic deformation of the leaf spring 6.

[0058] In particular, in this embodiment, one end of the leaf spring 6 in the optical axis direction is connected to the spring holding portion 7a, and the other end of the leaf spring 6 in the optical axis direction is connected to the spring holding portion 8a, so that when an impact in the optical axis direction is applied to the optical unit 1, the spring holding portions 7a and 8a can be elastically deformed on both sides of the leaf spring 6 in the optical axis direction. Therefore, in this embodiment, it is possible to effectively prevent plastic deformation of the leaf spring 6 when an impact in the optical axis direction is applied to the optical unit 1.

[0059] In this embodiment, the flat leaf spring 6, the flat leaf spring 7, and the flat leaf spring 8 are formed as separate bodies, and the flat spring 6 and the flat spring 7 formed as separate bodies are fixed to each other, and the flat spring 6 and the flat spring 8 formed as separate bodies are fixed to each other. Therefore, in this embodiment, when manufacturing the flat springs 6 to 8, it is not necessary to perform bending processing of the flat springs 6 to 8. Therefore, in this embodiment, even if the spring portion 43 is made small, the flat springs 6 to 8 can be easily manufactured. Also, in this embodiment, each of the flat leaf springs 6 to 8 can be handled as a single component, so that the flat springs 6 to 8 are less likely to deform when handling the flat springs 6 to 8 as a single component. Therefore, in this embodiment, even if the spring portion 43 is made small, the flat springs 6 to 8 can be easily handled when handling the flat springs 6 to 8 as a single component.

[0060] In this embodiment, a slit-shaped notch 7c into which the fixed portion 6a of the leaf spring 6 is inserted is formed at the tip of the spring holding portion 7a, and a slit-shaped notch 8c into which the fixed portion 6b of the leaf spring 6 is inserted is formed at the tip of the spring holding portion 8a. Therefore, in this embodiment, the notches 7c and 8c can be used to easily position the leaf spring 6 relative to the spring holding portions 7a and 8a, and the notches 7c and 8c can be used to temporarily fix the leaf spring 6 to the spring holding portions 7a and 8a. Therefore, in this embodiment, the fixing work of the fixed portions 6a and 6b to the tips of the spring holding portions 7a and 8a can be easily performed.

[0061] In this embodiment, the four spring holding parts 7a are integrated via the connecting parts 7b. Therefore, in this embodiment, the four spring holding parts 7a are easier to handle and the fixing work of the four spring holding parts 7a can be easily performed compared to when the four spring holding parts 7a are separate. Similarly, in this embodiment, the four spring holding parts 8a are integrated via the connecting parts 8b. Therefore, in this embodiment, the four spring holding parts 8a are easier to handle and the fixing work of the four spring holding parts 8a can be easily performed compared to when the four spring holding parts 8a are separate.

[0062] In this embodiment, the leaf spring 6 has a meandering portion 6c disposed between the fixed portion 6a and the fixed portion 6b, and the meandering portion 6c extends in the optical axis direction while meandering. Therefore, in this embodiment, when an impact is applied to the optical unit 1, stress is less likely to concentrate on the connection portion between the fixed portion 6a and the spring holding portion 7a and the connection portion between the fixed portion 6b and the spring holding portion 8a. Therefore, in this embodiment, even if the fixed portion 6a of the leaf spring 6 and the spring holding portion 7a of the leaf spring 7, which are formed separately, are fixed to each other, and the fixed portion 6b of the leaf spring 6 and the spring holding portion 8a of the leaf spring 8, which are formed separately, are fixed to each other, it is possible to prevent damage to the connection portion between the fixed portion 6a and the spring holding portion 7a and the connection portion between the fixed portion 6b and the spring holding portion 8a when an impact is applied to the optical unit 1.

[0063] In this embodiment, the spring portion 43 is disposed at a position offset from the first fulcrum portion 15 and the second fulcrum portion 16 in the circumferential direction centered on the optical axis L when viewed from the optical axis direction. Therefore, in this embodiment, the first fulcrum portion 15 and the second fulcrum portion 16 and the spring portion 43 are disposed at the same position in the circumferential direction centered on the optical axis L when viewed from the optical axis direction, and it is possible to reduce the size of the optical unit 1 in the radial direction centered on the optical axis L compared to a case in which the spring portion 43 is disposed on the outer side or inner side of the first fulcrum portion 15 and the second fulcrum portion 16 in the radial direction centered on the optical axis L.

[0064] (Other embodiments) The above-described embodiment is one example of a preferred embodiment of the present invention, but the present invention is not limited to this embodiment and various modifications are possible without departing from the spirit and scope of the present invention.

[0065] In the above-mentioned embodiment, if the leaf spring 6 is elastically deformable in the rotation direction of the movable body 3 relative to the holder 4, the thickness direction of the leaf spring 6 may be slightly inclined with respect to the rotation direction of the movable body 3 relative to the holder 4. Also, in the above-mentioned embodiment, if the spring holder 7a is elastically deformable in the optical axis direction, the thickness direction of the spring holder 7a may be slightly inclined with respect to the optical axis direction. Similarly, if the spring holder 8a is elastically deformable in the optical axis direction, the thickness direction of the spring holder 8a may be slightly inclined with respect to the optical axis direction.

[0066] In the above-mentioned embodiment, the meandering portion 6c of the leaf spring 6 may be composed of a plurality of straight line portions extending in the optical axis direction and a plurality of arc-shaped arc portions connecting the straight line portions arranged in the radial direction centered on the optical axis L. The leaf spring 6 may also have a base portion formed in a rectangular, elliptical, or oval shape, instead of the meandering portion 6c. In this case, a through hole penetrating the base portion may be formed in the base portion, or a slit-shaped groove may be formed in the base portion. The entire leaf spring 6 may also be formed in a rectangular, elliptical, or oval shape, etc. In this case, a through hole penetrating the leaf spring 6 or a slit-shaped groove may be formed in the leaf spring 6.

[0067] In the above-mentioned embodiment, the spring holding portion 7a may be formed in a bifurcated shape. Similarly, the spring holding portion 8a may be formed in a bifurcated shape. In addition, in the above-mentioned embodiment, the leaf spring 7 may be composed of two spring holding portions 7a and a connecting portion connecting the two spring holding portions 7a. In this case, the optical unit 1 includes two leaf springs 7. Similarly, the leaf spring 8 may be composed of two spring holding portions 8a and a connecting portion connecting the two spring holding portions 8a. In this case, the optical unit 1 includes two leaf springs 8. Furthermore, in the above-mentioned embodiment, the four spring holding portions 7a may not be connected. That is, the four spring holding portions 7a may be separated. Similarly, the four spring holding portions 8a may be separated. In addition, in the above-mentioned embodiment, the shape of the leaf spring 7 and the shape of the leaf spring 8 may be different.

[0068] In the above-mentioned embodiment, the fixed portion 6a may be fixed to the spring holding portion 7a by welding or adhesive. Similarly, the fixed portion 6b may be fixed to the spring holding portion 8a by welding or adhesive. Also, in the above-mentioned embodiment, the leaf spring 7 may be fixed to the holding body 4, and the leaf spring 8 may be fixed to the movable body 3. Furthermore, in the above-mentioned embodiment, the number of spring portions 43 included in the optical unit 1 may be three, or five or more. In this case, the multiple spring portions 43 are arranged, for example, at equal angular pitches centered on the optical axis L.

[0069] In the above-described embodiment, the optical unit 1 may not include the leaf spring 8. In this case, the fixed portion 6b is fixed to the frame member 22. In this case, the leaf spring 6 and the spring holding portion 7a of the leaf spring 7 form the spring portion 43. In the above-described embodiment, the optical unit 1 may not include the leaf spring 7. In this case, the fixed portion 6a is fixed to the holder 20. In this case, the spring portion 43 is formed by the leaf spring 6 and the spring holding portion 8a of the leaf spring 8.

[0070] In the above-described embodiment, the spring portion 43 may be disposed at the same position as the first fulcrum portion 15 and the second fulcrum portion 16 in the circumferential direction centered on the optical axis L when viewed from the optical axis direction. In this case, the spring portion 43 is disposed at a position shifted from the first fulcrum portion 15 and the second fulcrum portion 16 in the radial direction centered on the optical axis L when viewed from the optical axis direction. In the above-described embodiment, the first direction does not have to be perpendicular to the optical axis L. For example, the angle between the first direction and the optical axis L may be 80°, etc. In the above-described embodiment, the second direction does not have to be perpendicular to the first direction.

[0071] In the embodiment described above, the camera module 2 may include a rotation mechanism that rotates the lens and the imaging element of the camera module 2 about the first axis L1 and the second axis L2. In this case, the first intermediate member 10 and the second intermediate member 11 are not necessary. In this case, the leaf spring 8 is fixed to the case body 24. [Explanation of symbols]

[0072] 1 Optical unit 2 Camera module 3 Movable body 4 Holding body 5 Rotation mechanism 6 Leaf spring (first leaf spring) 6a, 6b Fixed part 6c Meandering section 6d Straight section 6e Arc section 7a, 8a Spring holder (second leaf spring) 7b, 8b connection part 7c, 8c notch 10 First intermediate member 11 Second intermediate member 12 Fixed body 15 First Support 16 Second Support Section 43 Spring part L Optical axis of the camera module V 1st direction W 2nd direction

Claims

1. a movable body having a camera module; a holder that holds the movable body on an inner periphery side so that the movable body can be rotated around an optical axis of the camera module; a rotation mechanism that has a drive magnet and a drive coil and rotates the movable body relative to the holder around the optical axis of the camera module; and a plurality of springs that connect the movable body and the holder; the holding body includes a first intermediate member that rotatably holds the movable body, a second intermediate member that rotatably holds the first intermediate member, and a fixed body that rotatably holds the second intermediate member, the movable body is rotatable relative to the first intermediate member around an optical axis of the camera module, the first intermediate member is rotatable relative to the second intermediate member with a first direction intersecting an optical axis of the camera module as a rotation axis direction, the second intermediate member is rotatable with respect to the fixed body about a second direction that intersects with the first direction and an optical axis of the camera module as an axial direction of rotation, a first fulcrum portion is disposed at each end of the first intermediate member in a first direction, the first fulcrum portion being a fulcrum for rotation of the first intermediate member relative to the second intermediate member; a second fulcrum portion is disposed at each end of the second intermediate member in the second direction, the second fulcrum portion serving as a fulcrum for rotation of the second intermediate member relative to the fixed body; the spring portion includes a flat first leaf spring that is elastically deformable in a rotational direction of the movable body relative to the holder, and a flat second leaf spring that is connected to an end of the first leaf spring in an optical axis direction that is a direction of the optical axis of the camera module and is elastically deformable in the optical axis direction, and is disposed at a position shifted from the first fulcrum portion and the second fulcrum portion in a circumferential direction centered on the optical axis of the camera module when viewed from the optical axis direction, The first leaf spring and the second leaf spring are formed separately, The first leaf spring and the second leaf spring are formed separately and fixed to each other, the spring portion includes the second leaf spring arranged on one side of the first leaf spring in the optical axis direction and having a base end fixed to the movable body, and the second leaf spring arranged on the other side of the first leaf spring in the optical axis direction and having a base end fixed to the holding body, one end of the first leaf spring in the optical axis direction being fixed to a tip portion of the second leaf spring fixed to the movable body, and the other end of the first leaf spring in the optical axis direction being fixed to a tip portion of the second leaf spring fixed to the holding body, or the spring portion includes a second leaf spring disposed on one side of the first leaf spring in the optical axis direction and having a base end fixed to the movable body, one end of the first leaf spring in the optical axis direction being fixed to a tip end of the second leaf spring fixed to the movable body, and the other end of the first leaf spring in the optical axis direction being fixed to the holder, or an optical unit characterized in that the spring portion includes a second leaf spring that is arranged on the other side of the first leaf spring in the optical axis direction and has a base end fixed to the holding body, one end of the first leaf spring in the optical axis direction being fixed to the movable body, and the other end of the first leaf spring in the optical axis direction being fixed to a tip portion of the second leaf spring that is fixed to the holding body.

2. The spring portion includes four of the spring portions, 2. The optical unit according to claim 1, wherein the four spring portions are arranged at a pitch of approximately 90 degrees around the optical axis of the camera module.

3. the spring portion includes the second leaf spring disposed on one side of the first leaf spring in the optical axis direction and having a base end fixed to the movable body, and the second leaf spring disposed on the other side of the first leaf spring in the optical axis direction and having a base end fixed to the holding body, One end of the first leaf spring in the optical axis direction is fixed to a tip end of the second leaf spring that is fixed to the movable body, 3. The optical unit according to claim 1, wherein the other end of the first leaf spring in the optical axis direction is fixed to a tip of the second leaf spring which is fixed to the holder.

4. An optical unit as described in any one of claims 1 to 3, characterized in that a slit-shaped notch is formed at the tip of the second leaf spring, into which the end of the first leaf spring in the optical axis direction is inserted.

5. a connecting portion connecting the second leaf springs arranged on one side in the optical axis direction, the connecting portion is formed in a flat plate shape and is disposed on the same plane as the plurality of second leaf springs disposed on one side in the optical axis direction, 5. The optical unit according to claim 1, wherein the second leaf springs arranged on one side in the optical axis direction and the connecting portion are integrally formed.

6. the first leaf spring includes a fixed portion that is fixed to the second leaf spring, and a meandering portion that is connected to the fixed portion and extends in the optical axis direction while meandering, 6. The optical unit according to claim 1, wherein the shape of the serpentine portion when viewed in the thickness direction of the first leaf spring is a wave-like shape composed of a plurality of straight line portions and a plurality of arc portions.

Images