Optical Unit

Abstract

To provide an optical unit capable of improving shake correction accuracy.SOLUTION: An optical unit 1 includes a movable body 2, a support body 3, a swing mechanism 120, and a magnetic member 73. The movable body includes an optical element 10. The optical element reflects light, which travels to one side in a first direction, to one side in a second direction intersecting the first direction. The support body supports the movable body so as to be swingable about a swing axis A2. The swing mechanism swings the movable body about the swing axis. The magnetic member is arranged on the support body. The swing mechanism includes a magnet 121 and a coil 125. The magnet is arranged at an end of the movable body in a direction intersecting the first direction. The coil opposes the magnet. The magnetic member is arranged on one side in the first direction with respect to the magnet.SELECTED DRAWING: Figure 5C

Description

[Technical field]

[0001] The present disclosure relates to an optical unit. [Background technology]

[0002] When taking still or moving images with a camera, image blur may occur due to camera shake. Image stabilization devices have been put to practical use to suppress image blur and enable clear shooting. When the camera is shaken, the image stabilization device suppresses image blur by correcting the attitude of the camera module in response to the camera shake (see, for example, Patent Document 1).

[0003] Patent Document 1 describes a prism module having a first base, a prism, and a first shake correction device. The first shake correction device has a pair of swing support springs, a holder, and a first actuator. The holder holds the prism. The pair of swing support springs support the holder so that it can swing relative to the first base. The first actuator swings the holder about a first axis. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. WO2019 / 156004 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the prism module of Patent Document 1, the holder is supported on the first base via a swing support spring. Therefore, when vibration or impact is applied to the prism module, the holder vibrates relative to the first base. In other words, the holder periodically shifts in position relative to the first base. Therefore, it is difficult to stably support the holder, and therefore difficult to improve the correction accuracy.

[0006] The present disclosure has been made in consideration of the above-mentioned problems, and has an object to provide an optical unit capable of improving correction accuracy. [Means for solving the problem]

[0007] An exemplary optical unit of the present disclosure includes a movable body, a support, a swing mechanism, and a magnetic member. The movable body includes an optical element that reflects light traveling in one direction in a first direction to one side in a second direction intersecting the first direction. The support supports the movable body so that the movable body can swing about a swing axis. The swing mechanism swings the movable body about the swing axis. The magnetic member is disposed on the support. The swing mechanism includes a magnet and a coil. The magnet is disposed at an end of the movable body in a direction intersecting the first direction. The coil faces the magnet. The magnetic member is disposed on one side of the magnet in the first direction. the magnet has a coil-facing surface facing the coil, and the magnet and the magnetic member overlap when viewed from a direction perpendicular to a direction in which the magnet and the coil face each other. Optical unit.

[0008] Another exemplary optical unit of the present disclosure includes a movable body, a support, an oscillating mechanism, and a preload section. The movable body includes an optical element that reflects light traveling in one direction in a first direction to one side in a second direction intersecting the first direction. The support supports the movable body so that it can oscillate about an oscillation axis extending along the first direction. The oscillating mechanism oscillates the movable body about the oscillation axis. The preload section applies a preload to the movable body and the support in the axial direction of the oscillation axis. The oscillating mechanism includes an oscillating magnet and a coil facing the oscillating magnet. The preload section includes a preload magnet and a magnetic member. The preload magnet is disposed on one of the movable body and the support. The magnetic member is disposed on the other of the movable body and the support. The preload magnet and the magnetic member are disposed on the oscillation axis, and the Swing The magnet has a coil-facing surface facing the coil, Swing When viewed from a direction perpendicular to the direction in which the magnet and the coil face each other, Swing An optical unit in which a magnet and the magnetic member overlap. Effect of the Invention

[0009] According to the exemplary embodiment of the present disclosure, an optical unit capable of improving correction accuracy can be provided. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a perspective view that illustrates a smartphone equipped with an optical unit according to an embodiment of the present disclosure. [Diagram 2] FIG. 2 is a perspective view showing the optical unit according to the present embodiment. [Diagram 3] FIG. 3 is an exploded perspective view of the optical unit according to the present embodiment, disassembled into a movable body and a support body. [Figure 4] FIG. 4 is an exploded perspective view of a movable body of the optical unit according to the present embodiment. [Figure 5A] FIG. 5A is a cross-sectional view taken along line VA-VA in FIG. [Figure 5B] FIG. 5B is a cross-sectional view taken along line VB-VB in FIG. [Figure 5C] FIG. 5C is a cross-sectional view taken along line VC-VC in FIG. [Figure 6] FIG. 6 is an exploded perspective view of the optical elements and the holder of the optical unit according to this embodiment. [Figure 7] FIG. 7 is an exploded perspective view of the first preload portion, the first support portion, and the second magnet of the optical unit according to the present embodiment. [Figure 8] FIG. 8 is a cross-sectional view of the first preload portion of the optical unit according to the present embodiment. [Figure 9] FIG. 9 is a perspective view showing a movable body of the optical unit according to the present embodiment. [Figure 10] FIG. 10 is a diagram showing the first support portion of the optical unit according to this embodiment from one side X1 in the first direction X. As shown in FIG. [Figure 11] FIG. 11 is an exploded perspective view of the support body of the optical unit according to this embodiment. [Figure 12] FIG. 12 is a perspective view showing the periphery of the second support portion of the optical unit according to the present embodiment. [Figure 13]FIG. 13 is a view showing the second support portion of the optical unit according to this embodiment from the other side X2 in the first direction X. As shown in FIG. [Figure 14] FIG. 14 is a diagram showing the second support portion, the shaft center convex portion, and the second magnet of the optical unit according to this embodiment from the other side X2 in the first direction X. As shown in FIG. [Figure 15] FIG. 15 is a cross-sectional view showing the structure of an optical unit according to a first modified example of this embodiment. [Figure 16] FIG. 16 is a perspective view showing a movable body of an optical unit according to a first modified example of this embodiment. [Figure 17] FIG. 17 is a perspective view showing the periphery of a second support portion of an optical unit according to a first modified example of this embodiment. [Figure 18] FIG. 18 is a cross-sectional view showing the structure around the first preload portion of an optical unit according to a second modified example of this embodiment. [Figure 19] FIG. 19 is a cross-sectional view showing an optical unit according to a third modified example of this embodiment. [Figure 20] FIG. 20 is a perspective view showing a movable body of an optical unit according to a fourth modified example of this embodiment. [Figure 21] FIG. 21 is a perspective view showing a support body of an optical unit according to a fourth modified example of this embodiment. [Figure 22] FIG. 22 is a perspective view showing a movable body of an optical unit according to a fifth modified example of this embodiment. [Figure 23] FIG. 23 is a diagram showing the second support portion, the axis center convex portion, the second magnet, and the third magnet of the optical unit according to the sixth modified example of this embodiment, viewed from the other side X2 in the first direction X. [Figure 24] FIG. 24 is a diagram showing the second support portion, the axis center convex portion, and the third magnet of the optical unit according to the seventh modified example of this embodiment, viewed from the other side X2 in the first direction X. As shown in FIG. [Diagram 25] FIG. 25 is a cross-sectional view showing an optical unit according to an eighth modified example of this embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, exemplary embodiments of the present disclosure will be described with reference to the drawings. In the drawings, the same or corresponding parts are designated by the same reference characters and description thereof will not be repeated.

[0012] In this specification, for ease of understanding, the first direction X, the second direction Y, and the third direction Z that intersect with each other are described as appropriate. In this specification, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other, but they do not have to be perpendicular to each other. In addition, one side of the first direction is described as one side X1 of the first direction X, and the other side of the first direction is described as the other side X2 of the first direction X. In addition, one side of the second direction is described as one side Y1 of the second direction Y, and the other side of the second direction is described as the other side Y2 of the second direction Y. In addition, one side of the third direction is described as one side Z1 of the third direction Z, and the other side of the third direction is described as the other side Z2 of the third direction Z. In addition, for convenience, the first direction X may be described as the up-down direction. One side X1 of the first direction X indicates the downward direction, and the other side X2 of the first direction X indicates the upward direction. However, the up-down direction, the upper direction, and the lower direction are defined for the convenience of explanation and do not necessarily correspond to the vertical direction. Furthermore, the up-down direction is defined merely for the convenience of explanation and does not limit the orientation of the optical unit according to the present disclosure during use or assembly.

[0013] First, an example of an application of the optical unit 1 will be described with reference to Fig. 1. Fig. 1 is a perspective view that illustrates a smartphone 200 equipped with the optical unit 1 according to an embodiment of the present disclosure. The optical unit 1 reflects incident light in a specific direction. As illustrated in Fig. 1, the optical unit 1 is preferably used as an optical component of the smartphone 200, for example. Note that the application of the optical unit 1 is not limited to the smartphone 200, and it can be used in various devices such as digital cameras and video cameras.

[0014] The smartphone 200 has a lens 202 into which light is incident. In the smartphone 200, the optical unit 1 is disposed inside the lens 202. When light L enters the smartphone 200 through the lens 202, the traveling direction of the light L is changed by the optical unit 1. Then, the light L is captured by an imaging element (not shown) through a lens (not shown).

[0015] Next, the optical unit 1 will be described with reference to FIG. 2 to FIG. 14. FIG. 2 is a perspective view showing the optical unit 1 according to the present embodiment. FIG. 3 is an exploded perspective view of the optical unit 1 according to the present embodiment, which is disassembled into a movable body 2 and a support body 3. As shown in FIG. 2 and FIG. 3, the optical unit 1 has at least the movable body 2, the support body 3, a second oscillating mechanism 120, and a magnetic member 73. In this embodiment, the optical unit 1 further has a first oscillating mechanism 110, a first preload unit 40, and an FPC (Flexible Printed Circuit) 80. These will be described in detail below. The second oscillating mechanism 120 is an example of the "oscillating mechanism" of the present disclosure. The magnetic member 73 is an example of the "magnetic member" of the present disclosure.

[0016] Fig. 4 is an exploded perspective view of the movable body 2 of the optical unit 1 according to this embodiment. As shown in Figs. 2 to 4, the optical unit 1 has the movable body 2 and a support body 3. The support body 3 supports the movable body 2 so as to be able to swing about a second swing axis A2. The second swing axis A2 is an example of the "swing axis" in the present disclosure.

[0017] The movable body 2 has an optical element 10, a holder 20, a first support portion 30, and a first preload portion 40. The optical element 10 changes the traveling direction of light. The holder 20 holds the optical element 10. The first support portion 30 supports the holder 20 and the optical element 10 so as to be swingable about a first oscillation axis A1. In addition, the first support portion 30 is supported by a second support portion 60 of the support body 3 so as to be swingable about a second oscillation axis A2.

[0018] That is, the holder 20 can be swung relative to the first support part 30, and the first support part 30 can be swung relative to the second support part 60. Therefore, the optical element 10 can be swung about each of the first swing axis A1 and the second swing axis A2, so that the attitude of the optical element 10 can be corrected about each of the first swing axis A1 and the second swing axis A2. Therefore, image blur can be suppressed regardless of the direction of the hand shake. As a result, the correction accuracy can be improved compared to the case where the optical element 10 is swung about only one swing axis. The first swing axis A1 is also called a pitching axis. The second swing axis A2 is also called a roll axis.

[0019] The first oscillation axis A1 is an axis extending along the third direction Z. Moreover, the second oscillation axis A2 is an axis extending along the first direction X. Therefore, the optical element 10 can be oscillated about the first oscillation axis A1 that intersects with the first direction X and the second direction Y. Moreover, the optical element 10 can be oscillated about the second oscillation axis A2 that extends along the first direction X. Therefore, the attitude of the optical element 10 can be appropriately corrected. The first direction X and the second direction Y are directions along the traveling direction of the light L.

[0020] Moreover, the first support part 30 supports the holder 20 in the third direction Z. Therefore, the first support part 30 can be easily swung about the first swing axis A1 extending along the third direction Z. Specifically, in this embodiment, the first support part 30 supports the holder 20 in the third direction Z via the first preload part 40.

[0021] FIG. 5A is a cross-sectional view taken along the line VA-VA in FIG. 2. FIG. 5B is a cross-sectional view taken along the line VB-VB in FIG. 2. FIG. 5C is a cross-sectional view taken along the line VC-VC in FIG. 2. FIG. 6 is an exploded perspective view of the optical element 10 and the holder 20 of the optical unit 1 according to this embodiment. As shown in FIGS. 5A to 5C and 6, the optical element 10 is made of a prism. The prism is made of a transparent material having a refractive index higher than that of air. The optical element 10 has a substantially triangular prism shape. Specifically, the optical element 10 has a light incident surface 11, a light exit surface 12, a reflecting surface 13, and a pair of side surfaces 14. Light L is incident on the light incident surface 11. The light exit surface 12 is connected to the light incident surface 11. The light exit surface 12 is disposed perpendicular to the light incident surface 11. The reflecting surface 13 is connected to the light incident surface 11 and the light exit surface 12. The reflecting surface 13 is inclined at approximately 45 degrees with respect to each of the light incident surface 11 and the light exit surface 12. The reflecting surface 13 reflects the light L, which is incident from the light incident surface 11 and travels in one side X1 of the first direction X, to one side Y1 of the second direction Y intersecting with the first direction X. That is, the optical element 10 reflects the light L, which travels in one side X1 of the first direction X, to one side Y1 of the second direction Y intersecting with the first direction X. A pair of side surfaces 14 are connected to the light incident surface 11, the light exit surface 12, and the reflecting surface 13.

[0022] The holder 20 is made of, for example, resin. The holder 20 has a holder body 21 and a pair of side surfaces 22. The holder 20 also has a pair of opposing side surfaces 22a, a groove 22b, and an on-axis recess 22c.

[0023] Specifically, the holder body 21 has an opposing surface 21a and at least three support protrusions 21d. In this embodiment, the holder body 21 has three support protrusions 21d. The opposing surface 21a faces the optical element 10. The opposing surface 21a is inclined at about 45 degrees with respect to the incident direction of the light L. The incident direction of the light L is a direction toward one side X1 of the first direction X. The support protrusions 21d are disposed on the opposing surface 21a. The support protrusions 21d protrude from the opposing surface 21a toward the optical element 10. The support protrusions 21d contact the reflecting surface 13 of the optical element 10 to support the optical element 10. Therefore, the optical element 10 is supported by the holder 20 with the three support protrusions 21d. Therefore, the optical element 10 can be stably supported by the holder 20 compared to a case in which the optical element 10 is supported by four or more points.

[0024] The holder body 21 also has a back surface 21b and a bottom surface 21c. The back surface 21b is connected to an end of the opposing surface 21a on the opposite side to the emission direction of the light L. The "emission direction of the light L" is one side Y1 of the second direction Y. The "end on the opposite side to the emission direction of the light L" is an end on the other side Y2 of the second direction Y. The bottom surface 21c is connected to the opposing surface 21a and the back surface 21b.

[0025] The pair of side surface portions 22 are disposed at both ends of the holder body 21 in the third direction Z. The pair of side surface portions 22 have shapes symmetrical to each other in the third direction Z. The pair of opposing side surfaces 22a are disposed on each of the pair of side surface portions 22. The pair of opposing side surfaces 22a are opposed to the pair of side surface portions 41 of the first preload portion 40, respectively. The detailed structure of the side surface portion 41 will be described later. The groove 22b is disposed on the opposing side surface 22a. The groove 22b is recessed toward the inside of the holder 20. The groove 22b extends to the other side Y2 in the second direction Y. The axial recess 22c is disposed inside the groove 22b. The axial recess 22c is recessed toward the inside of the holder 20 on the first swing axis A1. The axial recess 22c accommodates at least a part of the axial protrusion 41a of the first preload portion 40. The detailed structure of the axial protrusion 41a will be described later. The axial recess 22c has at least a portion of a concave spherical surface.

[0026] The first preload portion 40 is disposed on at least one of the holder 20 and the first support portion 30. The first preload portion 40 applies a preload to at least the other of the holder 20 and the first support portion 30 in the axial direction of the first oscillation axis A1. This makes it possible to prevent the holder 20 from shifting in position in the axial direction of the first oscillation axis A1. The axial direction of the first oscillation axis A1 is along the third direction. In this specification and the claims, "applying a preload" means applying a load in advance.

[0027] FIG. 7 is an exploded perspective view of the first preload portion 40, the first support portion 30, and the second magnet 121 of the optical unit 1 according to this embodiment. In this embodiment, the first preload portion 40 is configured by one member as shown in FIG. 5C and FIG. 7. The first preload portion 40 is disposed on the first support portion 30. The first preload portion 40 has a pair of side portions 41 and a connecting portion 42 that connects the pair of side portions 41 to each other. The pair of side portions 41 have shapes that are symmetrical to each other in the third direction Z. The pair of side portions 41 sandwich the holder 20 in the axial direction of the first oscillation axis A1. Therefore, with a simple configuration, a preload can be applied to the holder 20 in the axial direction of the first oscillation axis A1.

[0028] The side surface portion 41 has an on-axis convex portion 41a. The on-axis convex portion 41a protrudes toward the holder 20 on the first swing axis A1. The on-axis convex portion 41a has at least a part of a spherical surface. A part of the on-axis convex portion 41a is accommodated in the on-axis concave portion 22c. Therefore, the on-axis convex portion 41a and the on-axis concave portion 22c are in point contact with each other, so that the holder 20 can be stably supported by the first preload portion 40. In addition, the pair of on-axis convex portions 41a of the first preload portion 40 sandwich the pair of on-axis concave portions 22c of the holder 20 in the third direction Z. The holder 20 is supported by the first preload portion 40 at two contact points that contact the on-axis convex portions 41a. Therefore, the holder 20 can swing around the first swing axis A1 that passes through the two contact points.

[0029] FIG. 8 is a cross-sectional view of the first preload portion 40 of the optical unit 1 according to this embodiment. As shown in FIG. 8, in a state where the first preload portion 40 is not attached to the holder 20, the pair of side portions 41 are inclined inward with respect to the direction V perpendicular to the connection portion 42. The distance between the pair of side portions 41 becomes smaller as it moves away from the connection portion 42. Therefore, a larger preload can be applied to the holder 20 in the axial direction of the first oscillation axis A1 compared to a case where the distance between the pair of side portions 41 becomes larger as it moves away from the connection portion 42 and a case where the distance is the same. In addition, in a state where the first preload portion 40 is not attached to the holder 20, the distance W41a between the axial convex portions 41a is smaller than the distance W22c between the axial concave portions 22c of the holder 20 (see FIG. 5C).

[0030] The pair of side portions 41 and the connection portion 42 are configured by a single member. The first preload portion 40 can be attached to the holder 20 by pushing and spreading the pair of side portions 41 outward. That is, the first preload portion 40 can be attached to the holder 20 by pushing and spreading the pair of side portions 41 to one side Z1 and the other side Z2 in the third direction Z. In this embodiment, since the holder 20 has a groove 22b (see FIG. 6), the first preload portion 40 can be easily attached to the holder 20 by moving the axial convex portion 41a along the groove 22b. The first preload portion 40 is preferably formed of metal. The first preload portion 40 may be formed of resin.

[0031] 7, the connection portion 42 has a fitting hole 42a that fits onto the fitting protrusion 31d of the first support portion 30. The fitting hole 42a is disposed in the center of the connection portion 42 in the third direction Z. In this embodiment, the fitting hole 42a is provided to fix the first pre-load portion 40 to the first support portion 30.

[0032] FIG. 9 is a perspective view showing the movable body 2 of the optical unit 1 according to this embodiment. FIG. 10 is a view showing the first support portion 30 of the optical unit 1 according to this embodiment from one side X1 in the first direction X. FIG. 11 is an exploded perspective view of the support body 3 of the optical unit 1 according to this embodiment. FIG. 12 is a perspective view showing the periphery of the second support portion 60 of the optical unit 1 according to this embodiment. As shown in FIGS. 9 to 12, one of the first support portion 30 and the second support portion 60 has at least three axial center convex portions 71 protruding toward the other of the first support portion 30 and the second support portion 60. In this embodiment, the number of axial center convex portions 71 is three. Therefore, since the movable body 2 is supported by three axial center convex portions 71, the movable body 2 can be supported more stably than when the movable body 2 is supported by four or more axial center convex portions 71.

[0033] The other of the first support part 30 and the second support part 60 has an axial center recess 31f recessed in the opposite direction to the axial center protrusion 71. The axial center recess 31f contacts the axial center protrusion 71. The axial center recess 31f also forms at least a part of a circle centered on the second oscillation axis A2. Therefore, at least three axial center protrusions 71 move along the inner surface 31g of the axial center recess 31f. Therefore, the first support part 30 can be stably oscillated relative to the second support part 60 around the second oscillation axis A2.

[0034] In this embodiment, the first support part 30 has an axial center recess 31f, and the second support part 60 has an axial center protrusion 71. Therefore, when the axial center protrusion 71 is a sphere, the first support part 30 can be assembled to the second support part 60 with the sphere disposed in the second support part 60, which makes the assembly work easier.

[0035] Specifically, as shown in FIG. 7 and FIG. 9, the first support portion 30 has a support body 31 and a pair of side portions 32. The support body 31 has an upper opposing surface 31a, a recessed portion 31b, and a fitting protrusion 31d. The upper opposing surface 31a faces the holder 20 in the first direction X. The recessed portion 31b is disposed on the upper opposing surface 31a. The recessed portion 31b is slightly larger than the connecting portion 42 of the first preload portion 40. The recessed portion 31b accommodates the connecting portion 42. The recessed portion 31b has a bottom surface 31c. The fitting protrusion 31d is disposed on the bottom surface 31c. The fitting protrusion 31d protrudes from the bottom surface 31c toward the holder 20. The connecting portion 42 of the first preload portion 40 is disposed on the bottom surface 31c. The fitting protrusion 31d has a shape extending along the first swing axis A1. The fitting protrusion 31d has, for example, an oval shape or a rectangular shape. The fitting protrusion 31d is disposed in the fitting hole 42a and fits into the fitting hole 42a. Therefore, the first preload portion 40 can be fixed to the first support portion 30 by fitting the fitting hole 42a of the connection portion 42 into the fitting protrusion 31d of the first support portion 30. In this embodiment, the first support portion 30 has the fitting protrusion 31d, and the connection portion 42 has the fitting hole 42a. However, the first support portion 30 may have a fitting hole, and the connection portion 42 may have a fitting protrusion. In this embodiment, the first support portion 30 and the first preload portion 40 are fixed by fitting. However, the first support portion 30 and the first preload portion 40 may be fixed by a method other than fitting. For example, the first support portion 30 and the first preload portion 40 may be fixed by an adhesive. Also, the first support portion 30 and the first preload portion 40 may be integrally formed by insert molding or the like.

[0036] The pair of side surface portions 32 are arranged at both ends of the support body 31 in the third direction Z. The pair of side surface portions 32 have shapes that are symmetrical to each other in the third direction Z. The side surface portion 32 has an inner surface 32a and a recessed portion 32b. The inner surface 32a faces the holder 20 in the third direction Z. The recessed portion 32b is arranged on the inner surface 32a. The recessed portion 32b accommodates a portion of the side surface portion 41 of the first preload portion 40.

[0037] Moreover, the side surface portion 32 has an outer surface 32c and an accommodating recess 32d. The outer surface 32c faces outward in the third direction Z. The accommodating recess 32d is disposed in the outer surface 32c. The accommodating recess 32d accommodates at least a portion of the second magnet 121 of the second oscillating mechanism 120. The second magnet 121 is an example of the "magnet" of the present disclosure.

[0038] Moreover, the support body 31 has a lower facing surface 31e and an axial center recess 31f. The lower facing surface 31e faces the second support portion 60 of the support body 3 in the first direction X. The axial center recess 31f is disposed on the lower facing surface 31e. The axial center recess 31f is disposed on one side X1 in the first direction X with respect to the reflecting surface 13 of the optical element 10. Therefore, the axial center recess 31f can be disposed without blocking the optical path.

[0039] As described above, the shaft center recess 31f constitutes at least a part of a circle centered on the second oscillation axis A2. The shaft center recess 31f has a shape in which an end of a circle centered on the second oscillation axis A2 on one side Y1 in the second direction Y is cut out. A part of the reflecting surface 13 protrudes toward one side X1 in the first direction X and one side Y1 in the second direction Y with respect to the lower opposing surface 31e. Therefore, it is possible to prevent the optical element 10 from contacting the part of the first support part 30 where the shaft center recess 31f is arranged. That is, it is possible to secure a space for arranging the optical element 10. In this specification and claims, the term "circle" includes "circumference" and also includes "inside surrounded by the circumference".

[0040] As shown in Figs. 9 and 10, the shaft center recess 31f preferably constitutes at least a part of a circumference centered on the second oscillation axis A2. That is, the inner surface 31g of the shaft center recess 31f preferably has an inner side surface 31h on the radially inner side with respect to the second oscillation axis A2, an inner side surface 31i on the radially outer side, and a connecting surface 31j. The connecting surface 31j connects the inner side surface 31h and the inner side surface 31i. The inner surface 31g of the shaft center recess 31f contacts the shaft center protrusion 71. Therefore, the shaft center protrusion 71 can be held by the inner side surface 31i and the inner side surface 31h of the shaft center recess 31f. Therefore, the movable body 2 can be more stably oscillated with respect to the support 3 compared to a case where the shaft center recess 31f does not have the inner side surface 31h. The shaft center recess 31f does not have to have the inner side surface 31h. In other words, the entire area surrounded by the inner surface 31i may be recessed toward the other side X2 in the first direction X.

[0041] 11 and 12, the support 3 has a second support portion 60 and an axial center convex portion 71. A magnetic member 73 is disposed on the support 3. The support 3 preferably has an opposing surface 61a and an accommodating recess 61d. The accommodating recess 61d is an example of the "accommodating recess" of the present disclosure.

[0042] Specifically, the second support part 60 supports the first support part 30 so as to be swingable about the second oscillation axis A2. The second support part 60 also supports the first support part 30 in the first direction X. Therefore, the first support part 30 can be easily oscillated about the second oscillation axis A2 extending along the first direction X.

[0043] The second support portion 60 has a support body 61, a pair of side surface portions 62, and a back surface portion 63. The support body 61 has an opposing surface 61a, at least three accommodating recesses 61b, at least three circular protrusions 61c, and a plurality of accommodating recesses 61d. In this embodiment, the support body 61 has three accommodating recesses 61b, three circular protrusions 61c, and two accommodating recesses 61d.

[0044] The opposing surface 61a faces the movable body 2 in the first direction X. Specifically, the opposing surface 61a faces the lower opposing surface 31e of the first support portion 30 in the first direction X. The accommodating recess 61b, the circular convex portion 61c, and the accommodating recess 61d are arranged on the opposing surface 61a. The accommodating recess 61b and the accommodating recess 61d are recessed in the opposite direction to the movable body 2 in the first direction X. That is, the accommodating recess 61b and the accommodating recess 61d are recessed on one side X1 in the first direction X. The accommodating recess 61b faces the axial center recess 31f of the first support portion 30 in the first direction X. That is, the accommodating recess 61b is arranged on the same circumference C (see FIG. 13) centered on the second oscillation axis A2. The accommodating recess 61b accommodates a part of the axial center convex portion 71. Therefore, at least three shaft center convex portions 71 are arranged on the same circumference C centered on the second oscillation axis A2. The shaft center convex portions 71 protrude in the axial direction of the second oscillation axis A2. Therefore, at least three shaft center convex portions 71 protruding in the axial direction of the second oscillation axis A2 come into contact with the movable body 2. This allows the movable body 2 to be oscillated more stably relative to the support body 3. The axial direction of the second oscillation axis A2 is along the first direction X.

[0045] Moreover, one accommodating recess 61b is disposed at a position on the same circumference that is farthest from the optical element 10. On the other hand, the two accommodating recesses 61b are disposed at positions closer to the optical element 10 than the one accommodating recess 61b when aligned in the third direction Z.

[0046] The accommodation recess 61b holds a part of the shaft center protrusion 71. The circular protrusion 61c protrudes toward the first support portion 30. Since the circular protrusion 61c protrudes from the opposing surface 61a, the depth of the accommodation recess 61b can be increased. In this embodiment, the lower half of the shaft center protrusion 71 is disposed in the accommodation recess 61b. The shaft center protrusion 71 has at least a part of a spherical surface. Therefore, since the shaft center protrusion 71 is in point contact with the shaft center recess 31f, the movable body 2 can be smoothly moved relative to the support 3. In this embodiment, the shaft center protrusion 71 is a sphere. The shaft center protrusion 71 is rotatable within the accommodation recess 61b. Therefore, the friction between the shaft center protrusion 71 and the shaft center recess 31f of the first support portion 30 is rolling friction, so the effect of rolling friction can also be obtained.

[0047] Moreover, the material of the shaft center convex portion 71 is ceramic. Therefore, the shaft center convex portion 71 is non-magnetic and is not affected by magnets. Furthermore, wear of the shaft center convex portion 71 can be suppressed. The material of the shaft center convex portion 71 may be metal. In this case, wear of the shaft center convex portion 71 can also be suppressed. Furthermore, the entire shaft center convex portion 71 may be made of metal, or only the surface of the shaft center convex portion 71 may be made of metal by, for example, plating processing.

[0048] Furthermore, at least three shaft center protrusions 71 are disposed spaced apart from one another on the same circumference C centered on the second oscillation axis A2. Therefore, compared to a case in which the three shaft center protrusions 71 are not spaced apart, for example, the movable body 2 can be supported over a wider range.

[0049] Furthermore, the at least three shaft center convex portions 71 are respectively arranged at at least three predetermined positions on the same circumference C centered on the second oscillation axis A2. Therefore, the position of the shaft center convex portion 71 does not move relative to either the movable body 2 or the support body 3. This allows the movable body 2 to oscillate more stably relative to the support body 3. In this embodiment, the position of the shaft center convex portion 71 does not move relative to the support body 3.

[0050] Moreover, the two axial center convex portions 71 are arranged side by side in the third direction Z. The remaining axial center convex portion 71 is arranged on a circumference C having the two axial center convex portions 71 as both ends of a diameter. This makes it possible to prevent the optical element 10 from coming into contact with the axial center convex portion 71. In other words, it is possible to ensure a space for arranging the optical element 10.

[0051] Further, a triangle having vertices each consisting of the two axial center protrusions 71 and the remaining axial center protrusion 71 is a right-angled triangle. The interior angle of the remaining axial center protrusion 71 is about 90 degrees.

[0052] Moreover, the axial center convex portion 71 is disposed on one side X1 in the first direction X with respect to the reflecting surface 13 of the optical element 10. Therefore, the axial center convex portion 71 can be disposed without blocking the optical path.

[0053] The accommodating recess 61d faces the second magnet 121 of the second oscillating mechanism 120. The accommodating recess 61d accommodates the magnetic member 73. The accommodating recess 61d has a substantially rectangular shape. The magnetic member 73 has a rectangular shape. The accommodating recess 61d has an extension 61e that expands in a direction away from a corner of the magnetic member 73. This can prevent the corner of the magnetic member 73 from contacting the inner surface of the accommodating recess 61d. This can prevent the corner of the magnetic member 73 from chipping. The extension 61e is an example of an "extension" in the present disclosure.

[0054] The magnetic member 73 is a plate-shaped member made of a magnetic material. The magnetic member 73 is disposed on one side X1 in the first direction X with respect to the second magnet 121. Since a mutually attractive force (hereinafter also referred to as an attractive force) acts on the second magnet 121 and the magnetic member 73, it is possible to suppress the movable body 2 from being displaced in the first direction X with respect to the support body 3. Therefore, it is possible to stably support the movable body 2, and therefore it is possible to improve the correction accuracy. In addition, since the second magnet 121 of the second oscillating mechanism 120 is used, it is possible to suppress an increase in the number of parts.

[0055] FIG. 14 is a diagram showing the second support portion 60, the axial center convex portion 71, and the second magnet 121 of the optical unit 1 according to this embodiment from the other side X2 in the first direction X. As shown in FIG. 5C and FIG. 14, the second magnet 121 and the magnetic member 73 overlap when viewed from a direction perpendicular to the direction in which the second magnet 121 and the second coil 125 face each other. Therefore, by utilizing the magnetic flux that leaves the end face of the second magnet 121 in the second direction Y, passes under the second magnet 121, and enters the end face in the second direction Y, it is possible to suppress the movable body 2 from being displaced in the first direction X relative to the support 3. Note that the second coil 125 is an example of the "coil" of the present disclosure. In this embodiment, the second magnet 121 and the magnetic member 73 overlap when viewed from the first direction X. That is, the magnetic member 73 is disposed on one side X1 in the first direction X with respect to the surface 121f on one side X1 in the first direction X of the circumferential surface 121e of the second magnet 121. The surface 121f is the lower surface of the magnetic member 73. The detailed structure of the second magnet 121 will be described later.

[0056] In this embodiment, two magnetic members 73 are arranged in each of the housing recesses 61d. In other words, the magnetic members 73 are arranged to be spaced apart in the polarized direction of the second magnet 121 of the second oscillating mechanism 120. Therefore, the area of ​​the second magnet 121 is smaller than when the second magnet 121 is not spaced apart. Here, when the movable body 2 is oscillated by the second oscillating mechanism 120, a force acts on the movable body 2 in a direction returning to the reference position due to the attractive force between the second magnet 121 and the magnetic member 73. The reference position is a position where the side portion 32 of the first support portion 30 and the side portion 62 of the second support portion 60 are parallel to each other, as shown in FIG. 5B. The force acting on the movable body 2 in the direction returning to the reference position becomes smaller as the area of ​​the magnetic member 73 becomes smaller. Therefore, when the movable body 2 is oscillated by the second oscillating mechanism 120, the magnetic force acting on the movable body 2 in the direction returning to the reference position can be reduced. The second magnet 121 is polarized in a second direction Y as shown in FIG.

[0057] 12 and 14, the pair of side surface portions 62 are arranged at both ends of the support body 61 in the third direction Z. The pair of side surface portions 62 have shapes symmetrical to each other in the third direction Z. The side surface portion 62 has an accommodating hole 62a in which the second coil 125 of the second rocking mechanism 120 is disposed. The accommodating hole 62a penetrates the side surface portion 62 in the thickness direction. In other words, the accommodating hole 62a penetrates the side surface portion 62 in the third direction Z.

[0058] The rear surface portion 63 is disposed at an end portion on the other side Y2 in the second direction Y of the support body 61. The rear surface portion 63 has an accommodating hole 63a in which the first coil 115 of the first rocking mechanism 110 is disposed. The accommodating hole 63a penetrates the rear surface portion 63 in the thickness direction. In other words, the accommodating hole 63a penetrates the rear surface portion 63 in the second direction Y.

[0059] The FPC 80 is disposed so as to cover the outside of the pair of side surface portions 62 and the outside of the rear surface portion 63. The FPC 80 has, for example, a semiconductor element, a connection terminal, and wiring. The FPC 80 supplies power to the first coil 115 of the first oscillating mechanism 110 and the second coil 125 of the second oscillating mechanism 120 at a predetermined timing.

[0060] 11, the FPC 80 has a substrate 81, a connection terminal 82, a reinforcing plate 83, and a magnetic member 84. The substrate 81 is made of, for example, a polyimide substrate. The substrate 81 is flexible. The substrate 81 has a plurality of pin insertion holes 81a. The pin insertion holes 81a face the first coil 115 and the second coil 125. In each pin insertion hole 81a, a coil pin of the first coil 115 or a coil pin of the second coil 125 (not shown) is disposed.

[0061] The connection terminal 82 is disposed on the substrate 81. The connection terminal 82 faces the first rocking mechanism 110 and the second rocking mechanism 120. The connection terminal 82 is electrically connected to a terminal of a Hall element (not shown). For example, four connection terminals 82 are disposed for one Hall element. Three reinforcing plates 83 are disposed on the substrate 81. The reinforcing plates 83 face the first rocking mechanism 110 and the second rocking mechanism 120. The reinforcing plates 83 suppress bending of the substrate 81.

[0062] Three magnetic members 84 are arranged on the substrate 81. Two of the magnetic members 84 face the second magnet 121 of the second oscillating mechanism 120. When the second coil 125 is not energized, an attractive force is generated between the second magnet 121 and the magnetic member 84. Therefore, the movable body 2 is arranged at a reference position in the rotation direction about the second oscillating axis A2. The remaining magnetic member 84 faces the first magnet 111 of the first oscillating mechanism 110. When the first coil 115 is not energized, an attractive force is generated between the first magnet 111 and the magnetic member 84. Therefore, the movable body 2 is arranged at a reference position in the rotation direction about the first oscillating axis A1. The reference position will be described later.

[0063] 5A to 5C, the first swing mechanism 110 swings the holder 20 relative to the first support part 30 about a first swing axis A1. The first swing mechanism 110 has a first magnet 111 and a first coil 115. The first coil 115 faces the first magnet 111 in the second direction Y.

[0064] The first magnet 111 is disposed on one of the holder 20 and the second support section 60. On the other hand, the first coil 115 is disposed on the other of the holder 20 and the second support section 60. In this embodiment, the first magnet 111 is disposed on the holder 20. The first coil 115 is disposed on the second support section 60. Therefore, a force acts on the first magnet 111 due to a magnetic field generated when a current is passed through the first coil 115. Then, the holder 20 swings relative to the first support section 30. Therefore, the holder 20 can be swung with a simple configuration using the first magnet 111 and the first coil 115. In addition, by disposing the first coil 115 on the second support section 60, the first coil 115 does not swing relative to the second support section 60. Therefore, wiring can be easily performed on the first coil 115 compared to a case where the first coil 115 is disposed on, for example, the first support section 30.

[0065] Specifically, the first magnet 111 is disposed on the back surface 21b of the holder 20. That is, the first magnet 111 is disposed on the end portion 20a of the holder 20 on the other side Y2 in the second direction Y. The first magnet 111 has an n-pole portion 111a consisting of an n-pole and an s-pole portion 111b consisting of an s-pole. The first magnet 111 is polarized in the first direction X.

[0066] The first coil 115 is disposed in the accommodation hole 63a of the back surface portion 63 of the second support portion 60. That is, the first coil 115 is disposed at the end portion 60a of the second support portion 60 on the other side Y2 in the second direction Y. This makes it possible to prevent the first coil 115 and the first magnet 111 from being disposed on the optical path. This makes it possible to prevent the optical path from being blocked by the first coil 115 and the first magnet 111.

[0067] By passing a current through the first coil 115, a magnetic field is generated around the first coil 115. Then, a force caused by the magnetic field acts on the first magnet 111. As a result, the holder 20 and the optical element 10 swing relative to the first support part 30 and the second support part 60 around the first swing axis A1.

[0068] Furthermore, by arranging the first magnet 111 and the first coil 115 of the first rocking mechanism 110 along the second direction Y, the first magnet 111 and the first coil 115 attract each other in the second direction Y. Therefore, the force of attraction between the first magnet 111 and the first coil 115 in the second direction Y can prevent the holder 20 from slipping out to one side Y1 in the second direction Y.

[0069] The second rocking mechanism 120 rocks the movable body 2 about the second rocking axis A2. Specifically, the second rocking mechanism 120 rocks the first support part 30 relative to the second support part 60 about the second rocking axis A2. The second rocking mechanism 120 has a second magnet 121 and a second coil 125 facing the second magnet 121. The second magnet 121 is disposed on one of the first support part 30 and the second support part 60. On the other hand, the second coil 125 is disposed on the other of the first support part 30 and the second support part 60. In this embodiment, the second magnet 121 is disposed on the first support part 30. The second coil 125 is disposed on the second support part 60. Therefore, the first support part 30 rocks relative to the second support part 60 due to a magnetic field generated when a current is passed through the second coil 125. Therefore, the first support part 30 can be swung with a simple configuration using the second magnet 121 and the second coil 125. Furthermore, by arranging the second coil 125 in the second support part 60, the second coil 125 does not swung relative to the second support part 60. Therefore, wiring can be easily performed for the second coil 125 compared to the case where the second coil 125 is arranged in, for example, the first support part 30.

[0070] Specifically, the second magnet 121 is disposed in the housing recess 32d (see FIG. 7) of the side surface portion 32 of the first support portion 30. That is, the second magnet 121 is disposed at the end portion 30a of the movable body 2 in the direction intersecting with the first direction X. In this embodiment, the second magnet 121 is disposed at the end portion 30a of the movable body 2 in the third direction Z. Therefore, it is possible to suppress the movable body 2 from swinging about the first swing axis A1 extending in the third direction Z due to the attractive force acting on the second magnet 121 and the magnetic member 73. The second magnet 121 has an n-pole portion 121a consisting of an n-pole and an s-pole portion 121b consisting of an s-pole. The second magnet 121 is polarized in the second direction Y intersecting with the first direction X. Therefore, it is possible to swing the movable body 2 about the second swing axis A2 along the incident direction of light.

[0071] The second magnet 121 has a coil facing surface 121c, an inner surface 121d, and a peripheral surface 121e. The coil facing surface 121c faces the second coil 125. The inner surface 121d is disposed on the opposite side to the coil facing surface 121c. The peripheral surface 121e is connected to the coil facing surface 121c. The peripheral surface 121e is also connected to the inner surface 121d. The peripheral surface 121e is disposed around the coil facing surface 121c and the inner surface 121d over one revolution.

[0072] The second coil 125 faces the second magnet 121 in the third direction Z. The second coil 125 is disposed in the accommodation hole 62a (see FIG. 12) of the side surface portion 62 of the second support part 60. That is, the second coil 125 is disposed at the end portion 60b of the second support part 60 in the third direction Z.

[0073] By passing a current through the second coil 125, a magnetic field is generated around the second coil 125. Then, a force caused by the magnetic field acts on the second magnet 121. As a result, the first support part 30, the holder 20, and the optical element 10 swing relative to the second support part 60 around the second swing axis A2.

[0074] When the optical unit 1 is used in the smartphone 200 as shown in FIG. 1, a Hall element (not shown) in the smartphone 200 detects the attitude of the smartphone 200. The first rocking mechanism 110 and the second rocking mechanism 120 are controlled according to the attitude of the smartphone 200. It is also preferable that the attitude of the holder 20 with respect to the second support part 60 can be detected. In this case, the attitude of the holder 20 with respect to the second support part 60 can be controlled with high accuracy. A gyro sensor, for example, may be used as the sensor that detects the attitude of the smartphone 200.

[0075] Hereinafter, the first to eighth modified examples of this embodiment will be described with reference to Figures 15 to 25. Below, the differences from this embodiment shown in Figures 1 to 14 will be mainly described.

[0076] (First Modification) A first modified example of the embodiment of the present disclosure will be described with reference to Figures 15 to 17. In the first modified example, a case will be described in which the optical unit 1 has a preload part that applies a preload to the movable body 2 and the support body 3 in the axial direction of the oscillation axis.

[0077] As shown in FIG. 15 to FIG. 17, the optical unit 1 has a movable body 2, a support 3, a second oscillation mechanism 120, and a second preload section 140. The second preload section 140 is an example of a "preload section" in the present disclosure. The second preload section 140 applies a preload to the movable body 2 and the support 3 in the axial direction of the second oscillation axis A2. Specifically, the second preload section 140 has a magnetic member 141 made of a magnetic material and a third magnet 142. The magnetic member 141 is an example of a "magnetic member" in the present disclosure. The third magnet 142 is an example of a "preload magnet" in the present disclosure. In the first modified example, the second magnet 121 of the second oscillation mechanism 120 is an example of a "oscillating magnet" in the present disclosure. The second coil 125 of the second oscillation mechanism 120 is an example of a "coil" in the present disclosure.

[0078] The third magnet 142 is disposed on one of the movable body 2 and the support 3. The magnetic member 141 is disposed on the other of the movable body 2 and the support 3. The third magnet 142 and the magnetic member 141 are disposed on the second oscillation axis A2. Therefore, since a mutually attractive force acts on the third magnet 142 and the magnetic member 141, a preload can be applied to the movable body 2 and the support 3 in the axial direction of the second oscillation axis A2. Therefore, it is possible to suppress the movable body 2 from being displaced relative to the support 3 in the axial direction of the second oscillation axis A2. In addition, with a simple configuration using the third magnet 142 and the magnetic member 141, a preload can be applied to the movable body 2 and the support 3 in the axial direction of the second oscillation axis A2.

[0079] Furthermore, since the third magnet 142 and the magnetic member 141 are disposed on the second oscillation axis A2, when the movable body 2 oscillates about the second oscillation axis A2, it is possible to suppress a change in the positional relationship between the third magnet 142 and the magnetic member 141 in the second direction Y or the third direction Z. Therefore, it is possible to suppress a change in the mutual attractive force between the third magnet 142 and the magnetic member 141.

[0080] In the first modified example, the third magnet 142 is disposed on one of the first support portion 30 and the second support portion 60. The magnetic member 141 is disposed on the other of the first support portion 30 and the second support portion 60. More specifically, the third magnet 142 is disposed on the second support portion 60. The magnetic member 141 is disposed on the first support portion 30.

[0081] Next, the magnetic member 141 and the third magnet 142 will be described in detail. As shown in Figs. 15 and 16, the support body 31 has an accommodating recess 31k. The accommodating recess 31k is disposed on the lower opposing surface 31e. The accommodating recess 31k is disposed on the second oscillation axis A2. The accommodating recess 31k is recessed in the opposite direction to the support body 3 in the first direction X. In other words, the accommodating recess 31k is recessed to the other side X2 in the first direction X. The accommodating recess 31k accommodates the magnetic member 141.

[0082] As shown in Figs. 15 and 17, the second support portion 60 has an accommodating recess 61f. The accommodating recess 61f is disposed on the opposing surface 61a. The accommodating recess 61f is disposed on the second oscillation axis A2. The accommodating recess 61f is recessed in the opposite direction to the movable body 2 in the first direction X. In other words, the accommodating recess 61f is recessed on one side X1 in the first direction X. The accommodating recess 61f accommodates the third magnet 142. Therefore, the third magnet 142 faces the magnetic member 141 in the first direction X.

[0083] The accommodating recess 61f is substantially rectangular. The third magnet 142 is rectangular. The accommodating recess 61f has four extensions 61g that expand in a direction away from the corners of the third magnet 142. This prevents the corners of the third magnet 142 from contacting the inner side surface of the accommodating recess 61f. This prevents the corners of the third magnet 142 from chipping.

[0084] Moreover, in the first modified example, similarly to the embodiment shown in FIG. 1 to FIG. 14, the second magnet 121 is disposed at the end 30a of the movable body 2 in the direction intersecting with the first direction X. Moreover, the second coil 125 is disposed at a portion of the support 3 facing the second magnet 121. Therefore, the movable body 2 can be swung relative to the support 3 around the second swing axis A2 by using the second swing mechanism 120. Specifically, the second coil 125 is disposed in the accommodation hole 62a of the support 3. The accommodation hole 62a is an example of "a portion of the support facing the swing magnet" in the present disclosure.

[0085] In the first modified example, the magnetic member 73 is arranged on one side X1 in the first direction X with respect to the second magnet 121, and further, the magnetic member 141 and the third magnet 142 are arranged on the second oscillation axis A2. However, the magnetic member 141 and the third magnet 142 may be arranged on the second oscillation axis A2 without arranging the magnetic member 73 on one side X1 in the first direction X with respect to the second magnet 121. In this case, it is possible to prevent the movable body 2 from being displaced in the axial direction of the second oscillation axis A2 with respect to the support 3. It is also possible to prevent the positional relationship between the third magnet 142 and the magnetic member 141 from changing in the second direction Y or the third direction Z.

[0086] (Second Modification) A second modified example of the embodiment of the present disclosure will be described with reference to Fig. 18. In the second modified example, a case will be described in which the axial convex portion 45 of the first preload portion 40 is made of a sphere. As shown in Fig. 18, the pair of side surface portions 41 of the first preload portion 40 have an axial convex portion 45. The axial convex portion 45 protrudes toward the holder 20 on the first oscillation axis A1. The axial convex portion 45 is made of a sphere.

[0087] Moreover, the side surface portion 41 has a through hole 41b. The through hole 41b penetrates the side surface portion 41 in the thickness direction. That is, the through hole 41b penetrates the side surface portion 41 in the third direction Z. The through hole 41b is disposed on the first oscillation axis A1. The axial protrusion 45 is fixed to the through hole 41b. The axial protrusion 45 may be fitted into the through hole 41b. The axial protrusion 45 may also be fixed to the through hole 41b using, for example, an adhesive. A portion of the axial protrusion 45 is accommodated in the axial recess 22c. The axial protrusion 45 and the axial recess 22c are in point contact with each other.

[0088] (Third Modification) A third modified example of the embodiment of the present disclosure will be described with reference to FIG. 19. In the third modified example, a case will be described in which the holder 20 has an on-axis convex portion 22d. FIG. 19 is a cross-sectional view showing an optical unit 1 according to the third modified example of this embodiment. As shown in FIG. 19, a pair of side surface portions 22 of the holder 20 have an on-axis convex portion 22d. The on-axis convex portion 22d protrudes toward the first preload portion 40 on the first oscillation axis A1. The on-axis convex portion 22d has a part of a spherical surface. The on-axis convex portion 22d has, for example, a hemispherical shape.

[0089] The pair of side surface portions 41 of the first preload portion 40 have an axial recess 41c. The axial recess 41c is recessed toward the opposite side to the holder 20. The axial recess 41c is disposed on the first oscillation axis A1. The axial recess 41c has a portion of a concave spherical surface. A portion of the axial protrusion 22d is received in the axial recess 41c. The axial protrusion 22d and the axial recess 41c are in point contact with each other.

[0090] In the embodiment shown in FIG. 1 to FIG. 14, the shaft center protrusion 71 is a sphere, and the shaft center protrusion 71 is disposed in the accommodation recess 61b. However, the present disclosure is not limited to this example. That is, as shown in FIG. 19, the shaft center protrusion 61i may be formed of a single member together with the member constituting the support 3. More specifically, the shaft center protrusion 61i and the second support portion 60 may be formed of a single member. The shaft center protrusion may be formed of a single member together with the member constituting the movable body 2. The shaft center protrusion 61i may have, for example, a hemispherical shape. The shaft center protrusion 61i may have, for example, a shape in which the tip of a cylinder is formed into a hemispherical shape.

[0091] (Fourth Modification) A fourth modified example of the embodiment of the present disclosure will be described with reference to Figs. 20 and 21. In the fourth modified example, a case will be described in which the movable body 2 has an axial center convex portion 71, and the support body 3 has an axial center concave portion 61j. Fig. 20 is a perspective view showing the movable body 2 of the optical unit 1 according to the fourth modified example of this embodiment. Fig. 21 is a perspective view showing the support body 3 of the optical unit 1 according to the fourth modified example of this embodiment.

[0092] As shown in FIG. 20, the first support portion 30 has at least three shaft center protrusions 71 protruding toward the second support portion 60. Specifically, the support body 31 of the first support portion 30 has at least three accommodating recesses 31m and at least three circular protrusions 31n. In the fourth modified example, the number of each of the shaft center protrusions 71, the accommodating recesses 31m, and the circular protrusions 31n is three. The accommodating recesses 31m and the circular protrusions 31n are disposed on the lower opposing surface 31e. The accommodating recesses 31m are disposed on the same circumference centered on the second swing axis A2. The accommodating recesses 31m accommodate a part of the shaft center protrusions 71. Therefore, the shaft center protrusions 71 are disposed on the same circumference centered on the second swing axis A2. And the shaft center protrusions 71 protrude in the axial direction of the second swing axis A2.

[0093] 21, the second support part 60 has a shaft center recess 61j. The shaft center recess 61j is recessed in the opposite direction to the shaft center protrusion 71. Specifically, the support body 61 of the second support part 60 has the shaft center recess 61j. The shaft center recess 61j is disposed on the opposing surface 61a. The shaft center recess 61j forms at least a part of a circle centered on the second oscillation axis A2.

[0094] In the fourth modified example, the shaft center convex portion 71 moves along the inner surface of the shaft center concave portion 61j. Therefore, similar to the embodiment shown in Fig. 1 to Fig. 14, the first support part 30 can be stably swung relative to the second support part 60 around the second swing axis A2.

[0095] 1 to 14, an example in which the magnetic member 73 is disposed in the accommodating recess 61d has been described, but the present disclosure is not limited to this example. That is, as shown in FIG. 21, the second support part 60 does not have to have the accommodating recess 61d. In this case, the magnetic member 73 may be disposed on the opposing surface 61a of the second support part 60.

[0096] (Fifth Modification) A fifth modified example of the embodiment of the present disclosure will be described with reference to Fig. 22. Fig. 22 is a perspective view showing a movable body 2 of an optical unit 1 according to the fifth modified example of the present embodiment. As shown in Fig. 22, unlike the first modified example, in the fifth modified example, the support body 31 of the first support part 30 does not have an accommodating recess 31k (see Fig. 16). Moreover, the magnetic member 141 of the second preload part 140 is disposed on the lower opposing surface 31e of the support body 31.

[0097] (Sixth Modification) A sixth modified example of the embodiment of the present disclosure will be described with reference to Fig. 23. In the sixth modified example, a case will be described in which the magnetic member 74 extends along the swing direction of the second magnet 121. Fig. 23 is a diagram showing the second support part 60, the axial center convex part 71, the second magnet 121, and the third magnet 142 of the optical unit 1 according to the sixth modified example of this embodiment from the other side X2 in the first direction X.

[0098] 23, unlike the magnetic member 73 of the embodiment shown in Fig. 1 to Fig. 14, only one magnetic member 74 is disposed for one second magnet 121. The magnetic member 74 extends along the swing direction B1 of the second magnet 121. Therefore, the attractive force acting between the second magnet 121 and the magnetic member 74 can be made large.

[0099] (Seventh Modification) A seventh modified example of the embodiment of the present disclosure will be described with reference to FIG. 24. In the seventh modified example, a case where the magnetic member 75 has an arc shape centered on the second oscillation axis A2 will be described. FIG. 24 is a diagram showing the second support portion 60, the shaft center convex portion 71, and the third magnet 142 of the optical unit 1 according to the seventh modified example of this embodiment from the other side X2 of the first direction X. As shown in FIG. 24, the magnetic member 75 extends along the oscillation direction of the second magnet 121, similar to the sixth modified example. Furthermore, the magnetic member 75 has an arc shape centered on the second oscillation axis A2. Therefore, when the movable body 2 is oscillated around the second oscillation axis A2, it is possible to suppress the change in the overlapping area between the second magnet 121 and the magnetic member 75 in the axial direction of the second oscillation axis A2. Therefore, it is possible to suppress the change in the force of attraction between the second magnet 121 and the magnetic member 75.

[0100] 1 to 14, the accommodating recess 61k has an arc shape centered on the second oscillation axis A2. That is, the magnetic member 75 and the accommodating recess 61k are curved along the direction B2.

[0101] (Eighth Modification) An eighth modified example of the embodiment of the present disclosure will be described with reference to Fig. 25. Fig. 25 is a cross-sectional view showing an optical unit 1 according to the eighth modified example of the present embodiment. As shown in Fig. 25, in the eighth modified example, the magnetic member 141 of the second preload portion 140 is disposed on the surface of the first support portion 30 facing the holder 20. In other words, the magnetic member 141 is disposed on the surface of the first support portion 30 on the other side X2 in the first direction X.

[0102] Therefore, due to the attractive force between the magnetic member 141 and the third magnet 142, the magnetic member 141 presses the first support portion 30 toward the second support portion 60. Therefore, it is not necessary to fix the magnetic member 141 to the first support portion 30 using, for example, an adhesive.

[0103] 1 to 14, the optical element 10 is a prism, but the present disclosure is not limited to this example. For example, a thin plate-shaped reflective member (e.g., a mirror) may be used as the optical element 10.

[0104] 1 to 14, an example has been shown in which the first preload portion 40 is disposed on the first support portion 30, but the present disclosure is not limited to this example. A first preload portion that applies a preload in the axial direction of the first oscillation axis A1 may be disposed on the holder 20.

[0105] 1 to 14, an example has been shown in which the magnetic member 73 is disposed on one side X1 in the first direction X with respect to the second magnet 121, but the present disclosure is not limited to this. The magnetic member 73 may also be disposed on one side X1 in the first direction X with respect to the first magnet 111.

[0106] The embodiments (including modified examples) of the present disclosure have been described above with reference to the drawings. However, the present disclosure is not limited to the above embodiments, and can be implemented in various aspects without departing from the gist of the present disclosure. In addition, various disclosures can be formed by appropriately combining multiple components disclosed in the above embodiments. For example, some components may be deleted from all components shown in the embodiments. For example, components across different embodiments may be appropriately combined. The drawings are mainly schematic illustrations of each component for ease of understanding, and the thickness, length, number, spacing, etc. of each component shown in the drawings may differ from the actual ones due to the convenience of drawing. In addition, the material, shape, dimensions, etc. of each component shown in the above embodiments are examples and are not particularly limited, and various modifications are possible within a range that does not substantially deviate from the effects of the present disclosure. [Industrial Applicability]

[0107] The present disclosure can be used, for example, in an optical unit. [Explanation of symbols]

[0108] 1 Optical unit 2 Movable body 3 Support 10 Optical elements 30a end 61a Opposite side 61d Recessed part 61e Extension 62a: accommodation hole (portion of support facing oscillating magnet) 73~74 Magnetic materials 120 Second rocking mechanism (rocking mechanism) 121 Second magnet (magnet, oscillating magnet) 121c Coil facing surface 125 Second coil (coil) 140 Second preload section (preload section) 141 Magnetic materials 142 Third magnet (preload magnet) A2 Second swing axis (swing axis) B1 Swing direction L light

Claims

1. a movable body having an optical element that reflects light traveling in one direction of a first direction to one direction of a second direction intersecting the first direction; A support body supporting the movable body so as to be swingable about a swing axis; a swing mechanism that swings the movable body about the swing axis; A magnetic member disposed on the support; having the swing mechanism includes a magnet disposed at an end of the movable body in a direction intersecting the first direction, and a coil facing the magnet; the magnetic member is disposed on one side of the magnet in the first direction, the magnetic member is disposed on one side of the magnet in the first direction, the magnet has a coil-facing surface facing the coil, The magnet and the magnetic member overlap when viewed from a direction perpendicular to a direction in which the magnet and the coil face each other. Optical unit.

2. The optical unit according to claim 1 , wherein the magnet is disposed at an end of the movable body in a third direction intersecting the first direction and the second direction.

3. The pivot axis extends along the first direction, The optical unit according to claim 1 , wherein the magnet is polarized in a direction intersecting the first direction.

4. The optical unit according to claim 3 , wherein the magnetic members are arranged in a spaced relationship in a direction in which the magnet is polarized.

5. The pivot axis extends along the first direction, The optical unit according to claim 1 , wherein the magnetic member extends along a direction in which the magnet oscillates.

6. 6. The optical unit according to claim 5, wherein the magnetic member has an arc shape centered on the pivot axis.

7. the support body has an opposing surface facing the movable body in the first direction and an accommodating recess in which the magnetic member is accommodated, The accommodating recess is disposed on the opposing surface, The magnetic member has a rectangular shape, The optical unit according to claim 1 , wherein the accommodating recess has an extension portion that expands in a direction away from the corner portion of the magnetic member.

8. a movable body having an optical element that reflects light traveling in one direction of a first direction to one direction of a second direction intersecting the first direction; a support that supports the movable body so that the movable body can swing about a swing axis that extends along the first direction; a swing mechanism that swings the movable body about the swing axis; a preloading portion that applies a preload to the movable body and the support body in the axial direction of the swing axis; having The oscillating mechanism includes an oscillating magnet and a coil facing the oscillating magnet, the preload unit includes a preload magnet disposed on one of the movable body and the support body, and a magnetic member disposed on the other of the movable body and the support body, the preload magnet and the magnetic member are disposed on the swing axis, the oscillating magnet has a coil-facing surface facing the coil, When viewed from a direction perpendicular to the direction in which the oscillating magnet and the coil face each other, the oscillating magnet and the magnetic member overlap each other. Optical unit.

9. the oscillating magnet is disposed at an end of the movable body in a direction intersecting with the first direction, The optical unit according to claim 8 , wherein the coil is disposed in a portion of the support facing the oscillating magnet.

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