Optical unit with shake correction function

Abstract

To provide an optical unit with a shake correction function comprising a reflection member where a reflection surface is formed that reflects incident light from the outside, a movable body for swingably holding the reflection member and a stationary body for swingably holding a movable body, the optical unit with a shake correction function being downsizable in the axial direction of swinging of the reflection member to the movable body.SOLUTION: In this optical unit with a shake correction function, a reflection member 10 is designed to be swingable to a movable body 12, with a first direction used as the axial direction of swinging. A swinging shank 15 constituting the center of swinging of the reflection member 10 to the movable body 12 includes a ball 32 arranged on both sides of the reflection member 10 in a first direction, and a leaf spring 33 for urging the ball 32 toward the reflection member 10, the leaf spring 33 including a held part 33a and a spring part 33b for urging the ball 32. The thickness direction of the held part 33a coincides with the first direction, and the spring part 33 is elastically deformed in a direction to approach the held part 33a.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to an optical unit with shake correction function that has a shake correction function for correcting shake of an optical image. [Background technology]

[0002] Conventionally, imaging devices having a shake correction function that performs shake correction of an optical image by swinging an optical element are known (see, for example, Patent Document 1). The imaging optical system of the imaging device described in Patent Document 1 includes a front lens group and a rear lens group. The front lens group is composed of a prism on which a light reflecting surface is formed, a first lens arranged on the entrance surface side of the prism, and a second lens arranged on the exit surface side of the prism. In the imaging device described in Patent Document 1, the first lens is swung to correct shake of the optical image. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-207548 A Summary of the Invention [Problem to be solved by the invention]

[0004] The inventors of the present application have been considering rotating the reflecting member to correct the shake of an optical image in an optical unit with shake correction function that includes a reflecting member such as a prism that has a reflecting surface that reflects light incident from the outside toward an image sensor or the like. This optical unit with shake correction function includes a movable body that rotatably holds the reflecting member, a fixed body that rotatably holds the movable body, and a drive mechanism that rotates the reflecting member relative to the movable body and rotates the movable body relative to the fixed body, and the axial direction of the rotation of the reflecting member relative to the movable body and the axial direction of the rotation of the movable body relative to the fixed body are, for example, perpendicular to each other. Such optical units with shake correction function are often mounted and used in mobile devices such as smartphones, and therefore are preferably small in size.

[0005] Therefore, the object of the present invention is to provide an optical unit with shake correction function that includes a reflective member having a reflective surface that reflects light incident from the outside, a movable body that rotatably holds the reflective member, and a fixed body that rotatably holds the movable body, and that can be made smaller in size in the axial direction of rotation of the reflective member relative to the movable body. [Means for solving the problem]

[0006] In order to solve the above problems, the optical unit with shake correction function of the present invention comprises a reflective member having a reflective surface that reflects light incident from the outside, a movable body that rotatably holds the reflective member, a fixed body that rotatably holds the movable body, a drive mechanism that rotates the reflective member relative to the movable body and rotates the movable body relative to the fixed body, and a rotation axis portion that constitutes a rotation center of the reflective member relative to the movable body, wherein the reflective member is rotatable relative to the movable body with a predetermined first direction as the axial direction of the rotation, the rotation axis portion comprises spherical balls arranged on both sides of the reflective member in the first direction and a leaf spring that urges the balls toward the reflective member, the movable body comprises spring holding portions arranged on both sides of the reflective member in the first direction, the leaf springs comprise flat held portions held by the spring holding portions and a spring portion that is connected to the held portion and comes into contact with the ball to urge the ball, the thickness direction of the held portion coincides with the first direction, and the spring portion is elastically deformed in a direction approaching the held portion.

[0007] In the optical unit with shake correction function of the present invention, the leaf spring that urges the balls arranged on both sides of the reflecting member in the first direction toward the reflecting member includes a flat-plate-shaped held portion held by the spring holding portion of the movable body, and a spring portion that is connected to the held portion and contacts the ball to urge the ball. In addition, in the present invention, the thickness direction of the held portion coincides with the first direction, and the spring portion elastically deforms in a direction approaching the flat-plate-shaped held portion. Therefore, in the present invention, it is possible to reduce the overall thickness of the leaf spring in the first direction. That is, in the present invention, it is possible to reduce the overall thickness of the leaf spring in the axial direction of the rotation of the reflecting member relative to the movable body. Therefore, in the present invention, it is possible to reduce the size of the optical unit with shake correction function in the axial direction of the rotation of the reflecting member relative to the movable body.

[0008] In the present invention, the leaf spring incorporated in the optical unit with shake correction function is preferably flat with the first direction as the thickness direction. With this configuration, it is possible to make the overall thickness of the leaf spring thinner in the axial direction of the rotation of the reflecting member relative to the movable body. Therefore, it is possible to make the optical unit with shake correction function more compact in the axial direction of the rotation of the reflecting member relative to the movable body.

[0009] In the present invention, for example, the optical unit with shake correction function includes a fixed member to which a reflecting member is fixed, the movable body rotatably holds the reflecting member and the fixed member, the ball is fixed to the fixed member, and the spring portion is formed with a concavely curved receiving surface with which the ball comes into contact. In this case, since the ball is fixed to the fixed member, it is possible to prevent the ball from shifting from a predetermined position when, for example, the optical unit with shake correction function is dropped and an impact is applied to the optical unit with shake correction function.

[0010] In the present invention, the fixing member is made of a fixing member body formed of a resin material and a fixing member formed of a metal material. Fixing member bodyand a ball fixing plate fixed to the fixing member, and the ball is preferably made of a metal material and fixed to the ball fixing plate. With this configuration, it is possible to fix the metal ball to the metal ball fixing plate by welding, so that it is possible to increase the fixing strength of the ball fixed to the fixing member, compared to, for example, a case in which the metal ball is fixed by adhesion to a resin fixing member main body.

[0011] In the present invention, the optical unit with shake correction function may include a fixed member to which the reflecting member is fixed, the movable body rotatably holds the reflecting member and the fixed member, the ball is fixed to the spring portion, and the fixed member may be formed with a concavely curved receiving surface with which the ball comes into contact. Even in this case, since the ball is fixed to the spring portion, it is possible to prevent the ball from shifting from a predetermined position when, for example, the optical unit with shake correction function is dropped and an impact is applied to the optical unit with shake correction function. Effect of the Invention

[0012] As described above, in the present invention, in an optical unit with shake correction function that includes a reflective member on which a reflective surface that reflects light incident from the outside is formed, a movable body that rotatably holds the reflective member, and a fixed body that rotatably holds the movable body, it is possible to miniaturize the optical unit with shake correction function in the axial direction of rotation of the reflective member relative to the movable body. [Brief description of the drawings]

[0013] [Figure 1] 1 is a perspective view of an optical unit with a shake correction function according to an embodiment of the present invention; [Diagram 2] FIG. 2 is an exploded perspective view of the optical unit with shake correction function shown in FIG. [Diagram 3] 2 is a plan view of the optical unit with shake correction function shown in FIG. 1 with a cover removed. [Figure 4] FIG. 4 is a cross-sectional view taken along the E-E section of FIG. [Diagram 5]2 is a perspective view of a smartphone incorporating the optical unit with shake correction function shown in FIG. 1. [Figure 6] 6 is a schematic diagram for explaining the configuration of a camera built into the smartphone shown in FIG. 5. FIG. [Figure 7] 2A is a perspective view of the movable body and the leaf spring shown in FIG. 1, and FIG. 2B is an exploded perspective view of the movable body and the leaf spring shown in FIG. [Figure 8] 1A is a perspective view of a movable body and a leaf spring according to another embodiment of the present invention, and FIG. 1B is an exploded perspective view of the movable body and the leaf spring shown in FIG. [Figure 9] FIG. 11 is a side view of a leaf spring according to another embodiment of the present invention. [Figure 10] FIG. 11 is a side view for explaining an arrangement direction of a leaf spring according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0015] (Overall configuration of optical unit with shake correction function) FIG. 1 is a perspective view of an optical unit 1 with shake correction function according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the optical unit 1 with shake correction function shown in FIG. 1. FIG. 3 is a plan view of the optical unit 1 with shake correction function shown in FIG. 1 with a cover 29 removed. FIG. 4 is a cross-sectional view of the E-E cross section of FIG. 3. FIG. 5 is a perspective view of a smartphone 2 in which the optical unit 1 with shake correction function shown in FIG. 1 is built in. FIG. 6 is a schematic view for explaining the configuration of a camera 3 built in the smartphone 2 shown in FIG. 5.

[0016] The optical unit 1 with shake correction function (hereinafter referred to as "optical unit 1") of this embodiment has a shake correction function for correcting shake of an optical image. The optical unit 1 is built into, for example, a smartphone 2 (see FIG. 5). The optical unit 1 also constitutes a part of a camera 3 (see FIG. 6) built into the smartphone 2. The optical unit 1 may be built into a portable device other than the smartphone 2.

[0017] As shown in FIG. 6, the camera 3 includes a lens 4 into which light from outside the smartphone 2 is incident, and a substrate 6 on which an imaging element 5 is mounted. An optical axis L1 of the lens 4 is perpendicular to a normal line L2 passing through the center of the imaging surface of the imaging element 5. In other words, the optical axis L of the lens 4 is parallel to the imaging surface of the imaging element 5. The optical unit 1 is disposed between the lens 4 and the imaging element 5 on the optical path from the lens 4 to the imaging element 5. A lens 7 is disposed between the optical unit 1 and the imaging element 5. The optical axis of the lens 7 coincides with the normal line L2.

[0018] The optical unit 1 includes a prism 10 as a reflecting member having a reflecting surface 10a that reflects light incident from the outside. The reflecting surface 10a reflects the light incident on the reflecting surface 10a via the lens 4 toward the imaging element 5. The reflecting surface 10a also bends the optical axis of the light incident on the reflecting surface 10a by approximately 90°. Note that the prism 10 is not shown in FIG. 2.

[0019] In the following description, the direction of the optical axis L1 of the lens 4 (Z direction in FIG. 1, etc.) is the up-down direction, the direction of the normal L2 of the imaging surface of the imaging element 5 (X direction in FIG. 1, etc.) is the front-rear direction, and the Y direction in FIG. 1, etc., which is perpendicular to the up-down direction and the front-rear direction, is the left-right direction. In the up-down direction, the side where the lens 4 is arranged with respect to the optical unit 1 (Z1 direction side in FIG. 1, etc.) is the "upper" side, and the opposite side, the Z2 direction side in FIG. 1, etc., is the "lower" side. In the front-rear direction, the side where the imaging element 5 is arranged with respect to the optical unit 1 (X1 direction side in FIG. 1, etc.) is the "front" side, and the opposite side, the X2 direction side in FIG. 1, etc., is the "rear" side.

[0020] In addition to the prism 10, the optical unit 1 includes a holder 11 as a fixed member to which the prism 10 is fixed, a movable body 12 that rotatably holds the prism 10 and the holder 11, a fixed body 13 that rotatably holds the movable body 12, and a drive mechanism 14 that rotates the prism 10 and the holder 11 relative to the movable body 12 and rotates the movable body 12 relative to the fixed body 13. The optical unit 1 also includes a rotation shaft 15 that constitutes the rotation center of the prism 10 and the holder 11 relative to the movable body 12, and a rotation shaft 16 that constitutes the rotation center of the movable body 12 relative to the fixed body 13.

[0021] The movable body 12 is rotatable with respect to the fixed body 13 with the vertical direction as the axis of rotation. The prism 10 and the holder 11 are rotatable with respect to the movable body 12 with the direction perpendicular to the vertical direction as the axis of rotation. The axis of rotation of the prism 10 and the holder 11 with respect to the movable body 12 varies depending on the rotation position of the movable body 12 with respect to the fixed body 13, but is a direction slightly tilted from the left-right direction or coincides with the left-right direction. In the following description, the axis of rotation of the prism 10 and the holder 11 with respect to the movable body 12 is referred to as a "first direction". The optical unit 1 corrects the vibration of the optical image by performing at least one of the rotational movement of the movable body 12 with respect to the fixed body 13 and the rotational movement of the prism 10 and the holder 11 with respect to the movable body 12.

[0022] The holder 11 includes a main body 17 as a fixing member main body, and two ball fixing plates 18 fixed to the main body 17. The holder 11 in this embodiment is composed of the main body 17 and the two ball fixing plates 18. The main body 17 is formed of a resin material, and the ball fixing plates 18 are formed of a metal material such as a steel plate. The ball fixing plate 18 is formed in a flat plate shape. The ball fixing plate 18 is also formed in a circular plate shape. The prism 10 is fixed to the upper surface side of the main body 17. Most of the side surface of the prism 10 in the first direction is covered by the side surface portion of the main body 17 in the first direction.

[0023] The ball fixing plate 18 is disposed so that the thickness direction of the ball fixing plate 18 coincides with the first direction. The ball fixing plate 18 is fixed to the main body 17 while being disposed in a recess formed on the outer surface of the main body 17 in the first direction. The ball fixing plate 18 is also fixed to the main body 17 by bonding. A ball 32 (described later) that constitutes a part of the rotating shaft 15 is fixed to the ball fixing plate 18. A through hole is formed in the center of the ball fixing plate 18 to stabilize the fixed state of the ball 32.

[0024] The movable body 12 is formed of a resin material. The movable body 12 is composed of two side portions 12a constituting the side surfaces of the movable body 12 in the first direction, and a bottom surface portion 12b constituting the bottom surface of the movable body 12. The lower ends of the two side portions 12a are connected to both ends of the bottom surface portion 12b in the first direction. At the center of the bottom surface portion 12b in the first direction, a mounting portion 12c is formed to which a receiving member 39 (described later) constituting a part of the rotation shaft portion 16 is attached. The holder 11 is disposed between the two side portions 12a in the first direction. That is, the side portions 12a are disposed on both sides of the prism 10 and the holder 11 in the first direction. The holder 11 is also disposed above the bottom surface portion 12b.

[0025] The fixed body 13 is composed of a main body 19 and a ball fixing plate 20 fixed to the main body 19. The main body 19 is formed of a resin material, and the ball fixing plate 20 is formed of a metal material such as a steel plate. The main body 19 has two side portions 19a that form the left and right side surfaces of the fixed body 13, a back portion 19b that forms the rear surface of the fixed body 13, and a bottom surface portion 19c that forms the bottom surface of the fixed body 13. A rectangular opening 19d is formed in the bottom surface portion 19c, penetrating the bottom surface portion 19c in the up and down direction.

[0026] The movable body 12 is disposed between the two side surface portions 19a in the left-right direction. The movable body 12 is disposed in front of the rear surface portion 19b and above the bottom surface portion 19c. The main body portion 19 has a cover portion 19e that covers the mounting portion 12c of the movable body 12 from above. The cover portion 19e covers an opening portion 19d from above at the center of the main body portion 19 in the left-right direction. By moving the movable body 12 from below the bottom surface portion 19c so that the movable body 12 passes through the opening portion 19d, the movable body 12 is disposed within the area defined by the two side surface portions 19a and the rear surface portion 19b.

[0027] The ball fixing plate 20 is formed in a flat plate shape. The ball fixing plate 20 is formed in a disk shape. The ball fixing plate 20 is arranged so that the thickness direction of the ball fixing plate 20 coincides with the up-down direction. The ball fixing plate 20 is fixed to the cover portion 19e while being arranged in a recess formed in the lower surface of the cover portion 19e. The ball fixing plate 20 is also fixed to the cover portion 19e by bonding. A ball 37 (described later) constituting a part of the rotating shaft portion 16 is fixed to the ball fixing plate 20. A through hole is formed in the center of the ball fixing plate 20 to stabilize the fixed state of the ball 37.

[0028] The driving mechanism 14 includes a driving coil 22 and a driving magnet 23 for rotating the prism 10 and the holder 11 relative to the movable body 12, and two driving coils 24 and two driving magnets 25 for rotating the movable body 12 relative to the fixed body 13. The driving magnet 23 is fixed to the rear surface of the holder 11. The driving magnet 25 is fixed to the outer surface of the side surface portion 12a in the first direction. A magnetic plate 26 made of a magnetic material is disposed between the driving magnet 23 and the holder 11, and a magnetic plate 27 made of a magnetic material is disposed between the driving magnet 25 and the side surface portion 12a.

[0029] The driving coil 22 is disposed behind the driving magnet 23 and faces the driving magnet 23 in the front-rear direction. The driving coil 24 is disposed outside the driving magnet 25 in the left-right direction and faces the driving magnet 25 in the left-right direction. The driving coils 22, 24 are mounted on a flexible printed circuit board (FPC) 28. The FPC 28 is fixed to the main body 19. That is, the driving coils 22, 24 are fixed to the main body 19 via the FPC 28. A through hole in which the driving coil 24 is disposed is formed in the side portion 19a of the main body 19, and a recess in which the driving coil 22 is disposed is formed in the rear surface of the rear portion 19b. The FPC 28 is covered by a cover 29 from the outside in the left-right direction, the rear side, and the upper side. The cover 29 is fixed to the main body 19.

[0030] The rotating shaft portion 15 includes two spherical balls 32 arranged on the outer side of the holder 11 in the first direction, and two leaf springs 33 that urge the balls 32 inward in the first direction. That is, the rotating shaft portion 15 includes balls 32 arranged on both sides of the prism 10 and the holder 11 in the first direction, and leaf springs 33 that urge the balls 32 toward the prism 10 and the holder 11. The specific configuration of the rotating shaft portion 15 and the surrounding area of ​​the rotating shaft portion 15 will be described later.

[0031] The rotating shaft portion 16 includes a spherical ball 36 arranged below the mounting portion 12c, a spherical ball 37 arranged above the mounting portion 12c, a leaf spring 38 that urges the ball 36 upward, and a receiving member 39 attached to the mounting portion 12c. The leaf spring 38 is made of a metal material such as a steel plate. The leaf spring 38 includes an attached portion 38a that is attached to the lower surface side of the main body portion 19, and a spring portion 38b that urges the ball 36. The spring portion 38b is elastically deformable in the vertical direction.

[0032] The balls 36, 37 are made of a metal material such as steel. The ball 36 is welded and fixed to the upper surface side of the spring portion 38b. A through hole is formed in the spring portion 38b to stabilize the fixed state of the ball 36, and the lower end of the ball 36 is disposed in the through hole. The ball 37 is welded and fixed to the lower surface side of the ball fixing plate 20. The upper end of the ball 37 is disposed in a through hole formed in the center of the ball fixing plate 20.

[0033] The receiving member 39 is composed of a receiving portion 39b having a concave receiving surface with which the ball 36 comes into contact, a receiving portion 39d having a concave receiving surface with which the ball 37 comes into contact, and a flat connecting portion 39e connecting the receiving portion 39b and the receiving portion 39d. The receiving member 39 is formed of a metal material such as a steel plate. The connecting portion 39e is formed in a rectangular flat plate shape, and is arranged so that the thickness direction of the connecting portion 39e coincides with the front-rear direction. The receiving portion 39b extends from the lower end of the connecting portion 39e toward the front side. The receiving portion 39d extends from the upper end of the connecting portion 39e toward the front side. The receiving member 39 is attached to the attachment portion 12c from the rear side.

[0034] The balls 36 and 37 are disposed at the same position in the front-rear and left-right directions. The receiving surfaces of the receiving portions 39b and 39d are disposed at the same position in the front-rear and left-right directions. The movable body 12 rotates relative to the fixed body 13 about an axis passing through the center of the balls 36 and 37.

[0035] (Configuration of the rotating shaft portion and the surrounding portion of the rotating shaft portion) 7(A) is a perspective view of the movable body 12 and the leaf spring 33 shown in FIG. 1, and FIG. 7(B) is an exploded perspective view of the movable body 12 and the leaf spring 33 shown in FIG. 7(A).

[0036] As described above, the rotating shaft portion 15 includes two balls 32 and two leaf springs 33. The balls 32 are formed of a metal material such as steel. The balls 32 are fixed to the ball fixing plate 18. In other words, the balls 32 are fixed to the holder 11. The balls 32 are also fixed to the ball fixing plate 18 by welding. A portion of the balls 32 is disposed in a through hole of the ball fixing plate 18.

[0037] The leaf spring 33 is formed of a metal material such as a steel plate. The leaf spring 33 includes a flat-plate-shaped held portion 33a that is held on the side surface portion 12a of the movable body 12, and a spring portion 33b that contacts the ball 32 and biases the ball 32. The leaf spring 33 of this embodiment is composed of the held portion 33a and the spring portion 33b. The held portion 33a constitutes the lower portion of the leaf spring 33. The held portion 33a is formed in a substantially rectangular shape. The held portion 33a is arranged so that the thickness direction of the held portion 33a formed in a flat plate shape coincides with the first direction. In other words, the thickness direction of the held portion 33a coincides with the first direction.

[0038] The spring portion 33b is composed of a receiving portion 33d having a concave receiving surface 33c with which the ball 32 comes into contact, and a flat connecting portion 33e connecting the held portion 33a and the receiving portion 33d, and is connected to the held portion 33a. The receiving surface 33c is recessed from the inner surface of the receiving portion 33d in the first direction toward the outside in the first direction. The lower end of the connecting portion 33e is connected to the held portion 33a, and the upper end of the connecting portion 33e is connected to the lower end of the receiving portion 33d. The leaf spring 33 is bent at the boundary between the held portion 33a and the connecting portion 33e and at the boundary between the connecting portion 33e and the receiving portion 33d. The spring portion 33b extends from the boundary between the held portion 33a and the connecting portion 33e toward the inside and upper side in the first direction, and then extends from the boundary between the connecting portion 33e and the receiving portion 33d toward the upper side.

[0039] A slit portion 12d is formed on the inside of the side surface portion 12a in the first direction, into which the end of the held portion 33a in the direction perpendicular to the up-down direction and the first direction fits. The slit portion 12d is formed in two places on the side surface portion 12a. The held portion 33a is fixed to the side surface portion 12a with the end of the held portion 33a inserted into the slit portion 12d. For example, the held portion 33a is fixed by bonding to the side surface portion 12a. The lower end of the held portion 33a is in contact with the upper surface of the bottom surface portion 12b, and the leaf spring 33 is positioned in the up-down direction with respect to the movable body 12. The side surface portion 12a in this embodiment is a spring holding portion disposed on both sides of the prism 10 in the first direction.

[0040] The spring portion 33b is elastically deformable in the first direction. Moreover, the spring portion 33b is elastically deformed toward the outside in the first direction. That is, the spring portion 33b is elastically deformed in a direction approaching the held portion 33a. The two balls 32 are disposed at the same position in the vertical direction. Moreover, the two balls 32 are disposed at the same position in a direction perpendicular to the vertical direction and the first direction. The prism 10 and the holder 11 rotate relative to the movable body 12 around an axis passing through the centers of the two balls 32 as the rotation center.

[0041] (Main effects of this form) As described above, in this embodiment, the held portion 33a of the flat leaf spring 33 is held by the side portion 12a of the movable body 12 arranged on both sides of the prism 10 and the holder 11 in the first direction. In addition, in this embodiment, the thickness direction of the held portion 33a coincides with the first direction, and the spring portion 33b connected to the held portion 33a is elastically deformed in a direction approaching the held portion 33a. Therefore, in this embodiment, it is possible to reduce the overall thickness of the leaf spring 33 in the first direction. Therefore, in this embodiment, it is possible to reduce the size of the optical unit 1 in the first direction.

[0042] In this embodiment, the ball 32 is fixed to the holder 11. Therefore, in this embodiment, even if an impact is applied to the optical unit 1 due to, for example, the smartphone 2 being dropped, it is possible to prevent the ball 32 from shifting in position.

[0043] (Modification of leaf spring) Fig. 8(A) is a perspective view of a movable body 12 and a leaf spring 33 according to another embodiment of the present invention, and Fig. 8(B) is an exploded perspective view of the movable body 12 and the leaf spring 33 shown in Fig. 8(A). Fig. 9 is a side view of the leaf spring 33 according to another embodiment of the present invention. In Figs. 8 and 9, the same reference numerals are used for the same configurations as those in the above-mentioned embodiment.

[0044] In the above-described embodiment, the leaf spring 33 may be composed of a substantially Y-shaped held portion 33a and a spring portion 33b connected to the held portion 33a, as shown in Fig. 8. In the modified example shown in Fig. 8, the leaf spring 33 is slightly bent at the boundary between the held portion 33a and the connecting portion 33e, but is not bent at the boundary between the connecting portion 33e and the receiving portion 33d. In addition, in the case of this modified example, in the leaf spring 33 before being incorporated into the optical unit 1, the spring portion 33b extends from the boundary between the held portion 33a and the connecting portion 33e toward the inside and the upper side in the first direction, but when the leaf spring 33 is incorporated into the optical unit 1, the spring portion 33b is elastically deformed in a direction approaching the held portion 33a (i.e., elastically deformed toward the outside in the first direction), and the leaf spring 33 becomes flat.

[0045] That is, in the modified example shown in Fig. 8, the leaf spring 33 incorporated in the optical unit 1 is flat. In this modified example, an insertion hole 12e is formed in the movable body 12 into which an insertion portion 33f formed at the lower end of the held portion 33a is inserted. In this modified example, it is possible to make the overall thickness of the leaf spring 33 thinner in the first direction, and therefore it is possible to make the optical unit 1 more compact in the first direction. Note that Fig. 8 illustrates the leaf spring 33 when incorporated in the optical unit 1 and flat.

[0046] In the modified example shown in FIG. 8, as shown in FIG. 9(A), the leaf spring 33 may be composed of a held portion 33a constituting the lower end of the leaf spring 33, and a spring portion 33b having a connecting portion 33e connecting the receiving portion 33d and the held portion 33a on both sides in the direction perpendicular to the vertical direction and the first direction. In the modified example shown in FIG. 8, as shown in FIG. 9(B), the leaf spring 33 may be composed of a held portion 33a constituting the lower end of the leaf spring 33, and a spring portion 33b having a connecting portion 33e having a substantially S-shape that meanders in the direction perpendicular to the vertical direction and the first direction. In the modified example shown in FIG. 9, the leaf spring 33 in the state of being incorporated in the optical unit 1 is also flat. In the modified examples shown in FIG. 8 and FIG. 9, the leaf spring 33 in the state of being incorporated in the optical unit 1 does not have to be flat.

[0047] (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.

[0048] In the above-mentioned embodiment, as shown in FIG. 10, the held portion 33a may be fixed to the side surface portion 12a of the movable body 12 so that the held portion 33a constitutes the rear portion of the leaf spring 33. Also, the held portion 33a may be fixed to the side surface portion 12a of the movable body 12 so that the held portion 33a constitutes the front portion of the leaf spring 33. In this case, it is possible to reduce the size of the optical unit 1 in the vertical direction compared to the above-mentioned embodiment. On the other hand, in the above-mentioned embodiment, it is possible to reduce the size of the optical unit 1 in the direction perpendicular to the vertical direction and the first direction compared to the modified example shown in FIG. 10.

[0049] In the above-described embodiment, the holder 11 does not need to include the ball fixing plate 18. In this case, the ball 32 is directly bonded and fixed to the main body 19. However, as in the above-described embodiment, the ball 32 is welded and fixed to the ball fixing plate 18 in which a through hole is formed, and the ball fixing plate 18 is bonded and fixed to the main body 19, which can increase the fixing strength of the ball 32 to the holder 11. Also, in the above-described embodiment, the ball 32 does not need to be fixed to the leaf spring 33.

[0050] In the above-described embodiment, the ball 32 may be fixed to the leaf spring 33. In this case, for example, a metal receiving member having a concave receiving surface with which the ball 32 comes into contact is fixed to the main body 17 instead of the ball fixing plate 18. Alternatively, in this case, the concave receiving surface with which the ball 32 comes into contact is formed on the main body 17. That is, the holder 11 has a concave receiving surface with which the ball 32 comes into contact. Also, in this case, instead of the receiving portion 33d, the leaf spring 33 has a flat ball fixing portion to which the ball 32 is welded and fixed. For example, a through hole is formed in this ball fixing portion to stabilize the fixed state of the ball 32. Even in this case, it is possible to prevent the ball 32 from being displaced when an impact is applied to the optical unit 1 due to, for example, the smartphone 2 being dropped.

[0051] In the above-mentioned embodiment, the optical unit 1 may include a reflecting mirror having a reflecting surface formed thereon to reflect light incident from the outside, instead of the prism 10. Also, in the above-mentioned embodiment, the rotation shaft portion 16 may include a rotation center shaft supported on the fixed body 13 side. In this case, an insertion hole 12g through which the rotation center shaft is inserted is formed in the movable body 12 (see FIG. 8). Furthermore, in the above-mentioned embodiment, the axis direction of rotation of the movable body 12 relative to the fixed body 13 and the axis direction of rotation of the prism 10 and the holder 11 relative to the movable body 12 do not have to be perpendicular to each other. [Explanation of symbols]

[0052] 1 Optical unit (optical unit with shake correction function) 10 Prism (reflective material) 10a reflective surface 11 Holder (fixing member) 12 Movable body 12a Side portion (spring holding portion) 13 Fixed body 14 Drive mechanism 15 Rotating shaft 17 Main body (fixing member main body) 18 Ball fixing plate 32 Ball 33 Leaf Spring 33a Holding part 33b Spring part 33c Receiving surface

Claims

1. the reflecting device includes a reflecting member having a reflecting surface that reflects light incident from the outside, a movable body that rotatably holds the reflecting member, a fixed body that rotatably holds the movable body, a drive mechanism that rotates the reflecting member relative to the movable body and rotates the movable body relative to the fixed body, and a rotation shaft that constitutes a rotation center of the reflecting member relative to the movable body, The reflecting member is rotatable with respect to the movable body with a predetermined first direction as an axial direction of the reflecting member, the pivot shaft portion includes a spherical ball disposed on each side of the reflecting member in a first direction, and a leaf spring that biases the ball toward the reflecting member, The movable body includes spring holders disposed on both sides of the reflecting member in a first direction, the leaf spring includes a flat-plate-shaped held portion held by the spring holding portion, and a spring portion connected to the held portion and in contact with the ball to urge the ball, A thickness direction of the held portion coincides with a first direction, The spring portion is elastically deformed in a direction approaching the held portion.

2. 2. The optical unit with shake correction function according to claim 1, wherein the leaf spring incorporated in the optical unit with shake correction function has a flat plate shape with a thickness direction in a first direction.

3. a fixing member to which the reflecting member is fixed, the movable body rotatably holds the reflecting member and the fixed member, The ball is fixed to the fixed member, 3. The optical unit with shake correction function according to claim 1, wherein the spring portion is formed with a receiving surface shaped like a concave curve with which the ball comes into contact.

4. the fixing member includes a fixing member body made of a resin material and a ball fixing plate made of a metal material and fixed to the fixing member body, 4. The optical unit with shake correction function according to claim 3, wherein the ball is made of a metal material and is fixed to the ball fixing plate.

5. a fixing member to which the reflecting member is fixed, the movable body rotatably holds the reflecting member and the fixed member, The ball is fixed to the spring portion, 3. The optical unit with shake correction function according to claim 1, wherein the fixed member is formed with a receiving surface shaped like a concave curve with which the ball comes into contact.

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