Optical Unit

Abstract

To provide an optical unit capable of generating attraction force in two directions such as an optical axis direction or a direction intersecting the optical axis and the other direction between a movable body and a support.SOLUTION: An optical unit 1 includes a movable body 2, a support 3, and a first suction mechanism 210. The movable body includes an optical element 10. The optical element reflects light travelling to one side in a first direction, to one side in a second direction intersecting the first direction. The support swingably supports the movable body around a swinging axis line. The first suction mechanism generates suction force at the movable body between the movable body and the support. The first suction mechanism includes a first suction magnet 121 and a first suction magnetic member 123. One of the first suction magnet and the first suction magnetic member is arranged in the movable body. The other of the first suction magnet and the first suction magnetic member is arranged in the support. As viewed from a first predetermined direction, the first suction magnet overlaps with the first suction magnetic member.SELECTED DRAWING: Figure 5B

Description

[Technical field]

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

[0002] 2. Description of the Related Art When taking still or moving images with a camera, image blurring may occur due to camera shake. To prevent this, image stabilization devices have been put to practical use to enable clear photography.

[0003] For example, Patent Document 1 describes a camera module having a reflection module and a drive holder that supports the reflection module. The reflection module has a reflection member and a drive frame to which the reflection member is attached. The drive frame rotates about a rotation axis relative to the drive holder. A pulling magnet is arranged on the drive frame. A pulling yoke is arranged on the drive holder. An attractive force is formed between the drive frame and the drive holder. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] US Patent Application Publication No. 2019 / 0129197 Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, in a camera module such as that disclosed in Patent Document 1, the magnet and the yoke are usually arranged so that their centers overlap when viewed in the optical axis direction or in a direction intersecting the optical axis.

[0006] However, since the center of the magnet and the center of the yoke are positioned so as to overlap when viewed from the optical axis direction or the direction intersecting the optical axis, an attractive force occurs between the magnet and the yoke only in the optical axis direction or the direction intersecting the optical axis.

[0007] The present invention has been made in consideration of the above-mentioned problems, and its object is to provide an optical unit that is capable of generating attractive forces between a movable body and a support body in two directions: the optical axis direction or a direction intersecting the optical axis, and another direction. [Means for solving the problem]

[0008] An exemplary optical unit of the present invention includes a movable body, a support, and a first attraction mechanism. The movable body includes an optical element. The optical element reflects light traveling in one direction of a first direction to one side of a second direction intersecting the first direction. The support supports the movable body so as to be swingable about a swing axis. The first attraction mechanism generates an attraction force in the movable body between the movable body and the support. The first attraction mechanism includes a first attraction magnet and a first attraction magnetic member. One of the first attraction magnet and the first attraction magnetic member is disposed on the movable body. The other of the first attraction magnet and the first attraction magnetic member is disposed on the support. When viewed from a first predetermined direction, the first attraction magnet and the first attraction magnetic member overlap. The first predetermined direction is any one of the first direction, the second direction, and the third direction. The third direction is a direction intersecting the first direction and the second direction. When viewed from the first predetermined direction, the center of the first attracting magnet and the center of the first attracting magnetic member are spaced apart. Effect of the Invention

[0009] According to an exemplary embodiment of the present invention, it is possible to provide an optical unit capable of generating attractive forces in two directions, that is, the optical axis direction or a direction intersecting the optical axis, and another direction. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a perspective view showing a schematic diagram of a smartphone equipped with an optical unit according to an embodiment of the present invention. [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 5D] FIG. 5D is a cross-sectional view taken along line VD-VD 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 showing the optical elements, the holder, and the preload portion of the optical unit according to the present embodiment. [Figure 8] FIG. 8 is an exploded perspective view showing the optical elements, the holder, the preload portion, the first support portion, and the second magnet 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 cross-sectional view showing the structure of an optical unit according to a modified example of this embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, exemplary embodiments of the present invention 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 invention when it is used or assembled.

[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 shows a smartphone 200 including the optical unit 1 according to an embodiment of the present invention. The smartphone 200 has the optical unit 1. The optical unit 1 reflects incident light in a specific direction. As shown 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) via a lens unit (not shown).

[0015] Next, the optical unit 1 will be described with reference to Fig. 2 to Fig. 13. Fig. 2 is a perspective view showing the optical unit 1 according to this embodiment. Fig. 3 is an exploded perspective view of the optical unit 1 according to this embodiment, disassembled into a movable body 2 and a support body 3. As shown in Figs. 2 and 3, the optical unit 1 has the movable body 2, the support body 3, and a first suction mechanism 210.

[0016] In this specification, in order to facilitate understanding, an overview of the optical unit 1 of this embodiment will first be described. The movable body 2 has an optical element 10. The optical element 10 reflects light L (see FIG. 2) traveling in one side of a first direction X to one side Y1 of a second direction Y intersecting the first direction X. The support 3 supports the movable body 2 so as to be swingable about a second swing axis A2. The second swing axis A2 is an example of the "swing axis" of the present invention. The first suction mechanism 210 generates a suction force (hereinafter, sometimes referred to as an attractive force) in the movable body 2 between the movable body 2 and the support 3. In this specification, the suction force means a force that attracts two substances to each other.

[0017] The oscillation axis extends along one of the first direction X and the second direction Y. The support 3 supports the movable body 2 in the axial direction of the oscillation axis. Therefore, the support 3 can easily oscillate the movable body 2 around the oscillation axis. Note that, in this embodiment, an example will be described in which the support 3 supports the movable body 2 in the axial direction of the second oscillation axis A2 extending in the first direction X, but the present invention is not limited thereto. For example, the support 3 may support the movable body 2 in the axial direction of the first oscillation axis A1 extending in the second direction Y.

[0018] The first attraction mechanism 210 has a second magnet 121 and a magnetic member 123. The second magnet 121 is an example of the "first attracting magnet" of the present invention. The magnetic member 123 is an example of the "first attracting magnetic member" of the present invention. One of the second magnet 121 and the magnetic member 123 is disposed on the movable body 2. The other of the second magnet 121 and the magnetic member 123 is disposed on the support 3. When viewed from the first predetermined direction, the second magnet 121 and the magnetic member 123 overlap. The first predetermined direction is any one of the first direction X, the second direction Y, and the third direction Z. The third direction Z is a direction intersecting the first direction X and the second direction Y. In this embodiment, the first predetermined direction is the third direction Z. Therefore, an attractive force in the third direction Z can be generated in the movable body 2.

[0019] 5B, when viewed from the first predetermined direction, the center O121 of the second magnet 121 and the center O123 of the magnetic member 123 are separated from each other. Therefore, an attractive force can be generated between the movable body 2 and the support body 3 in two directions, the first predetermined direction and a direction other than the first predetermined direction. In this embodiment, an attractive force can be generated between the movable body 2 and the support body 3 in two directions, the third direction Z and the second direction Y.

[0020] The optical unit 1 further has a second attraction mechanism 220 that generates an attraction force on the movable body 2 between the movable body 2 and the support 3. The second attraction mechanism 220 has a first magnet 111 and a magnetic member 112. The first magnet 111 is an example of a "second attracting magnet" in the present invention. The magnetic member 112 is an example of a "second attracting magnetic member" in the present invention. One of the first magnet 111 and the magnetic member 112 is disposed in the movable body 2. The other of the first magnet 111 and the magnetic member 112 is disposed in the support 3.

[0021] The center of the other of the second magnet 121 and the magnetic member 123 (member arranged on the support 3) of the first attraction mechanism 210 is disposed on one side of the second predetermined direction intersecting with the first predetermined direction with respect to the center of one of the second magnet 121 and the magnetic member 123 (member arranged on the movable body 2). In this embodiment, the center O123 of the magnetic member 123 arranged on the support 3 is disposed on one side Y1 of the second direction Y intersecting with the third direction Z with respect to the center O121 of the second magnet 121 arranged on the movable body 2. In addition, the center of the other of the first magnet 111 and the magnetic member 112 (member arranged on the support 3) of the second attraction mechanism 220 is disposed on the other side of the second predetermined direction with respect to the center of one of the first magnet 111 and the magnetic member 112 (member arranged on the movable body 2). Therefore, the direction of the force acting on the movable body 2 by the second attraction mechanism 220 and the direction of the force acting on the movable body 2 by the first attraction mechanism 210 can be made opposite to each other in the second predetermined direction. Therefore, the force in the second predetermined direction acting on the movable body 2 by the second attraction mechanism 220 can be canceled out or reduced by the first attraction mechanism 210. In this embodiment, the center O112 of the magnetic member 112 arranged on the support 3 is arranged on the other side Y2 in the second direction Y with respect to the center O111 of the first magnet 111 arranged on the movable body 2. Note that the center O111 of the first magnet 111 and the center O112 of the magnetic member 112 are arranged at the same position as the second oscillation axis A2 in the third direction Z.

[0022] As shown in FIG. 3 and FIG. 5B, the movable body 2 has a holder 20 that holds the optical element 10, and a first support section 30 that supports the holder 20 so as to be able to swing. The support 3 has a second support section 60 that supports the first support section 30 so as to be able to swing. One of the second magnet 121 and the magnetic member 123 of the first attraction mechanism 210 is disposed in the first support section 30. The other of the second magnet 121 and the magnetic member 123 is disposed in the second support section 60. In addition, one of the first magnet 111 and the magnetic member 112 of the second attraction mechanism 220 is disposed in the holder 20. The other of the first magnet 111 and the magnetic member 112 is disposed in the second support section 60. Therefore, it is possible to apply an attraction force to the holder 20 on the other side of the second predetermined direction while canceling or reducing the force acting on the first support section 30 in the second predetermined direction. Specifically, the second suction mechanism 220 applies a suction force to the holder 20 on the other side in the second predetermined direction. At this time, a force also acts on the first support unit 30 supporting the holder 20 on the other side in the second predetermined direction. In addition, the first suction mechanism 210 applies a suction force to one side in the second predetermined direction to the first support unit 30. Therefore, the resultant force of the second suction mechanism 220 and the first suction mechanism 210 on the first support unit 30 in the second predetermined direction can be made zero or small. On the other hand, a force can be applied to the holder 20 on the other side in the second predetermined direction.

[0023] The structure of the optical unit 1 of this embodiment will be described in detail below.

[0024] 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 invention.

[0025] The movable body 2 has an optical element 10. The movable body 2 also has a holder 20 and a first support portion 30. The movable body 2 also has a 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 that intersects with the second oscillation axis A2. The first support portion 30 is also supported by the support 3 so as to be swingable about the second oscillation axis A2. More specifically, the first support portion 30 is supported by the second support portion 60 of the support 3 so as to be swingable about the second oscillation axis A2.

[0026] 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, since the optical element 10 can be swung about each of the first swing axis A1 and the second swing axis A2, 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 in two directions. 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.

[0027] In this embodiment, as described above, the first support section 30 supports the holder 20 and the optical element 10. The first support section 30 is supported by the second support section 60. That is, the holder 20 and the optical element 10 are indirectly supported by the second support section 60 of the support body 3 via the first support section 30. Note that the holder 20 and the optical element 10 may be directly supported by the second support section 60 of the support body 3 without via the first support section 30. That is, the movable body 2 does not need to have the first support section 30.

[0028] In this embodiment, as described above, the first support section 30 supports the holder 20 and the optical element 10. The first support section 30 is supported by the second support section 60. That is, the holder 20 and the optical element 10 are indirectly supported by the second support section 60 of the support body 3 via the first support section 30. Note that the holder 20 and the optical element 10 may be directly supported by the second support section 60 of the support body 3 without via the first support section 30. That is, the movable body 2 does not need to have the first support section 30.

[0029] The first oscillation axis A1 is an axis extending along the third direction Z intersecting the first direction X and the second direction Y. The second oscillation axis A2 is an axis extending along the first direction X. Therefore, the optical element 10 can be oscillated around the first oscillation axis A1 intersecting the first direction X and the second direction Y. Also, the optical element 10 can be oscillated around the second oscillation axis A2 extending along the first direction X. Therefore, the attitude of the optical element 10 can be appropriately corrected. Also, the first direction X and the second direction Y are directions along the traveling direction of the light L (FIG. 5A). That is, the optical element 10 can be oscillated around the first oscillation axis A1 intersecting the first direction X and the second direction Y, which are the traveling directions of the light. Therefore, the attitude of the optical element 10 can be more appropriately corrected.

[0030] 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 preload part 40.

[0031] 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. 5D is a cross-sectional view taken along the line VD-VD 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 5D 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 may be, for example, a plate-shaped mirror. In this embodiment, 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 light L traveling 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.

[0032] In addition, the optical axis L10 of the optical element 10 and the second oscillation axis A2 are arranged to overlap. In this specification, the optical axis L10 of the optical element 10 means an axis that coincides with at least one of the following: an axis that is perpendicular to the light incident surface 11 of the optical element 10 and passes through the center of the reflecting surface 13, or the optical axis of the lens 202 into which light is incident, or an axis that passes through the intersection of the optical axis of the lens unit at the reflection destination and the reflecting surface 13 and extends in a direction perpendicular to the optical axis of the lens unit, or an axis that passes through the intersection of the reflecting surface 13 and a line passing through the center of the imaging element and a line passing through the center of the imaging element. Typically, the axis that is perpendicular to the light incident surface 11 of the optical element 10 and passes through the center of the reflecting surface 13, the optical axis of the lens 202 into which the light is incident, the axis that passes through the intersection of the optical axis of the lens unit at the destination of reflection and the reflecting surface 13 and extends in a direction perpendicular to the optical axis of the lens unit, and the axis that passes through the intersection of the line passing through the center of the imaging element and the reflecting surface 13 and extends in a direction perpendicular to the line passing through the center of the imaging element, all coincide.

[0033] At least one of the holder 20 and the first support portion 30 has a recessed portion recessed on the side opposite the preload portion 40, or a protruding portion protruding toward the preload portion 40. In this embodiment, the holder 20 has an axial recessed portion 22b recessed on the side opposite the preload portion 40.

[0034] Specifically, the holder 20 is made of, for example, resin. The holder 20 has a holder main body 21 and a pair of side surface portions 22. The holder 20 also has a pair of opposing side surfaces 22a and an axial recess 22b.

[0035] The holder body 21 extends in the third direction Z. The holder body 21 has a support surface 21a and a plurality of recesses 21d. In this embodiment, the holder body 21 has three recesses 21d. The support surface 21a supports the optical element 10. The support surface 21a faces the reflecting surface 13 of the optical element 10 and is connected to a pair of side portions 22. The support surface 21a is an inclined surface inclined at about 45 degrees with respect to the incident direction of the light L, and contacts the reflecting surface 13 of the optical element 10 over substantially the entire area of ​​the inclined surface. The incident direction of the light L is a direction toward one side X1 of the first direction X. The recesses 21d are disposed on the support surface 21a. The recesses 21d are recessed on the opposite side to the optical element 10. Note that the holder body 21 does not necessarily have the recesses 21d.

[0036] The holder body 21 also has a rear surface 21b and a bottom surface 21c. The rear surface 21b is connected to an end of the support 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 support surface 21a and the rear surface 21b.

[0037] The pair of side portions 22 extend from the holder body 21 in a cross direction crossing the third direction Z. The cross direction includes, for example, the first direction X and the second direction Y. The pair of side portions 22 are arranged at both ends of the holder body 21 in the third direction Z. The pair of side portions 22 have shapes symmetrical to each other in the third direction Z. The pair of opposing side surfaces 22a are arranged on each of the pair of side portions 22. The pair of opposing side surfaces 22a face the pair of preload portions 40, respectively. The detailed structure of the preload portion 40 will be described later. The axial recess 22b is arranged on the opposing side surface 22a. The axial recess 22b is recessed toward the inside of the holder 20 on the first swing axis A1. The axial recess 22b accommodates at least a part of the axial protrusion 45 of the preload portion 40. The axial recess 22b has at least a part of a concave spherical surface.

[0038] Further, one of the holder 20 and the first support portion 30 has a limiting recess 22c. The limiting recess 22c limits the movement of the protruding portion 46 of the preload portion 40 in a direction intersecting with the first swing axis A1.

[0039] In this embodiment, the holder 20 has a limiting recess 22c. Specifically, the limiting recess 22c is disposed on the opposing side surface 22a. The limiting recess 22c limits the preload portion 40 from moving a predetermined distance or more along the side surface portion 22. More specifically, the limiting recess 22c is recessed toward the inside of the holder 20 in the third direction Z. The limiting recess 22c has an inner surface 22d. For example, the limiting recess 22c may be a recess that is closed on both sides in the first direction X and both sides in the second direction Y. Also, for example, the limiting recess 22c may be a recess that is open on one side in the first direction X, or a recess that is open on one side in the second direction Y.

[0040] The protrusion 46 of the preload portion 40 is disposed inside the limiting recess 22c. The protrusion 46 of the preload portion 40 is spaced a predetermined distance from the inner surface 22d of the limiting recess 22c when the axial convex portion 45 is fitted into the axial recess 22b. On the other hand, when an impact or the like is applied to the optical unit 1 and the holder 20 is about to move a predetermined distance or more in the first direction X and the second direction Y, for example, the protrusion 46 of the preload portion 40 contacts the inner surface 22d of the limiting recess 22c. Therefore, it is possible to prevent the holder 20 from coming off the preload portion 40. In this embodiment, for example, four limiting recesses 22c are provided. The number of limiting recesses 22c may be one, but is preferably multiple.

[0041] The optical unit 1 has a preload portion 40. The preload portion 40 connects the holder 20 and the first support portion 30. The preload portion 40 is elastically deformable. The preload portion 40 is disposed on at least one of the holder 20 and the first support portion 30. The 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 swing axis A1. Therefore, it is possible to suppress the holder 20 from being displaced in the axial direction of the first swing axis A1 relative to the first support portion 30. Even if a manufacturing error occurs in the dimensions of each member, it is possible to suppress the occurrence of wobbling or the like in the axial direction of the first swing axis A1. In other words, for example, it is possible to suppress the displacement of the position of the holder 20 in the axial direction of the first swing axis A1. The axial direction of the first swing axis A1 is a direction along the third direction Z. In this specification, the term "applying a preload" means applying a load in advance.

[0042] Next, the detailed structure of the preload portion 40 will be described with reference to Figs. 7 and 8. Fig. 7 is an exploded perspective view showing the optical element 10, holder 20, and preload portion 40 of the optical unit 1 according to this embodiment. Fig. 8 is an exploded perspective view showing the optical element 10, holder 20, preload portion 40, first support portion 30, and second magnet 121 of the optical unit 1 according to this embodiment. As shown in Figs. 7 and 8, the preload portion 40 is disposed between the holder 20 and the first support portion 30. The preload portion 40 applies a preload to the holder 20 in the axial direction of the first oscillation axis A1.

[0043] Specifically, in this embodiment, each preload portion 40 is a single member. The preload portion 40 is formed by bending a single plate member. In this embodiment, the preload portion 40 is a leaf spring. The preload portion 40 is disposed on the first support portion 30.

[0044] The preload portion 40 has a first surface portion 41 located on the holder 20 side, a second surface portion 42 located on the first support portion 30 side, and a curved portion 43 connecting the first surface portion 41 and the second surface portion 42. Therefore, the preload portion 40 can be easily deformed in the axial direction of the first oscillation axis A1. As a result, an elastic force is generated by the bending of the curved portion 43, so that a preload can be easily applied to the holder 20 in the axial direction with a simple configuration.

[0045] Specifically, the first surface portion 41 faces the holder 20 in the axial direction of the first swing axis A1. The first surface portion 41 faces the side surface portion 22 of the holder 20. The first surface portion 41 extends along the first direction X and the second direction Y. The first surface portion 41 is disposed along the side surface portion 22. The second surface portion 42 faces the first support portion 30 in the axial direction of the first swing axis A1. The second surface portion 42 faces the side surface portion 32 of the first support portion 30. The second surface portion 42 extends along the first direction X and the second direction Y. The second surface portion 42 is disposed along the side surface portion 32.

[0046] The curved portion 43 is elastically deformable. Therefore, the first surface portion 41 and the second surface portion 42 can move in a direction to approach or separate from each other. In this embodiment, with the preload portion 40 disposed between the holder 20 and the first support portion 30, the preload portion 40 is compressively deformed in the axial direction of the first oscillation axis A1 so that the first surface portion 41 and the second surface portion 42 approach each other. Therefore, the preload portion 40 applies a preload to the holder 20 by a reaction force according to the amount of deformation.

[0047] The preload portion 40 has a convex portion that protrudes toward at least one of the holder 20 and the first support portion 30, or a concave portion that is recessed toward the opposite side of at least one of the holder 20 and the first support portion 30. The convex portion or concave portion of the preload portion 40 contacts the concave portion or convex portion of at least one of the holder 20 and the first support portion 30. In this embodiment, the preload portion 40 has an axial convex portion 45. The axial convex portion 45 protrudes toward the holder 20. The axial convex portion 45 of the preload portion 40 contacts the axial concave portion 22b of the holder 20.

[0048] In this embodiment, the axial convex portion 45 is disposed on the first surface portion 41. The axial convex portion 45 protrudes toward the holder 20 on the first oscillation axis A1. The axial convex portion 45 has at least a portion of a spherical surface. A portion of the axial convex portion 45 is housed in the axial concave portion 22b. Therefore, the axial convex portion 45 and the axial concave portion 22b are in point contact with each other, so that the holder 20 can be stably supported by the preload portion 40.

[0049] Moreover, in this embodiment, a pair of preload portions 40 are provided. That is, the optical unit 1 has a pair of preload portions 40. The pair of preload portions 40 are arranged on both sides of the holder 20 in the axial direction of the first oscillation axis A1. Therefore, compared to a case in which the preload portions 40 are arranged on only one side of the holder 20, the holder 20 can be supported more stably.

[0050] Specifically, the axial convex portions 45 of the pair of preload portions 40 respectively contact the pair of axial concave portions 22b of the holder 20. The holder 20 is supported from both sides in the axial direction of the first oscillation axis A1 by the preload portions 40 at two contact points that contact the axial convex portions 45. Therefore, the holder 20 can swing about the first oscillation axis A1 that passes through the two contact points.

[0051] Moreover, the preload portion 40 further has a protruding portion 46. The protruding portion 46 is disposed on one of the first surface portion 41 and the second surface portion 42, and protrudes toward one of the holder 20 and the first support portion 30. In this embodiment, the protruding portion 46 is disposed on the first surface portion 41, similar to the axial protruding portion 45. The protruding portion 46 protrudes toward the holder 20 in a direction along the first swing axis A1. The protruding portion 46 is provided corresponding to the limiting recess 22c. For example, four protruding portions 46 are provided on each preload portion 40. A part of the protruding portion 46 is accommodated in the limiting recess 22c. The protruding portion 46 is disposed so as to surround the axial protruding portion 45. In other words, the axial protruding portion 45 is disposed inside a region including the four protruding portions 46. The number of the protruding portions 46 may be, for example, one to three, or five or more. Moreover, the protrusion 46 is formed by bending an end portion of the first surface portion 41.

[0052] The preload portion 40 has an attachment portion 47. The attachment portion 47 is disposed on, for example, the second surface portion 42. The attachment portion 47 is disposed on an upper end of the second surface portion 42. The attachment portion 47 is attached to an upper end of the side surface portion 32 of the first support portion 30. The attachment portion 47 is attached to the side surface portion 32, for example, by sandwiching the upper end of the side surface portion 32 in the first direction X. Note that the preload portion 40 does not need to have the attachment portion 47, and may be fixed to the first support portion 30 using, for example, an adhesive or the like.

[0053] 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 part 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 part 60 of the optical unit 1 according to this embodiment.

[0054] As shown in FIG. 9 to FIG. 12, one of the movable body 2 and the support 3 has a first convex portion 71 that protrudes toward the other of the movable body 2 and the support 3. Specifically, one of the first support portion 30 and the second support portion 60 has a first convex portion 71 that protrudes toward the other of the first support portion 30 and the second support portion 60. The other of the movable body 2 and the support 3 contacts the first convex portion 71. The first convex portion 71 is disposed on the second oscillation axis A2. Therefore, the movable body 2 oscillates around the first convex portion 71. Therefore, the length from the contact position between the movable body 2 and the support 3 to the oscillation center can be reduced. Since the force required to oscillate the movable body 2 is the product of the length from the contact position to the oscillation center and the friction force, the force required to oscillate the movable body 2 can be reduced by disposing the first convex portion 71 on the second oscillation axis A2. In other words, the force required to drive the optical unit 1 can be reduced. The material of the first protrusion 71 is not particularly limited, but the first protrusion 71 is formed of, for example, ceramic, resin, or metal.

[0055] Furthermore, by arranging the first convex portion 71 on the second oscillation axis A2, the contact position between the movable body 2 and the support 3 does not move relative to the first convex portion 71. Therefore, for example, the frictional force between the other of the movable body 2 and the support 3 and the first convex portion 71 can be reduced compared to a case in which the other of the movable body 2 and the support 3 slides relative to the first convex portion 71 when the movable body 2 oscillates. Furthermore, since the optical axis L10 and the second oscillation axis A2 are arranged to overlap with each other, it is possible to suppress deviation of the optical axis L10 from the second oscillation axis A2 when the movable body 2 is oscillated.

[0056] Moreover, in this embodiment, the support 3 has the first convex portion 71. Therefore, it is possible to prevent the first convex portion 71 from rotating when the movable body 2 oscillates. Therefore, the movable body 2 can be stably supported by the first convex portion 71. As a result, the oscillation of the movable body 2 is stabilized.

[0057] Moreover, one of the movable body 2 and the support 3 has a plurality of second convex parts 72 that protrude toward the other of the movable body 2 and the support 3. Specifically, one of the first support part 30 and the second support part 60 has a plurality of second convex parts 72 that protrude toward the other of the first support part 30 and the second support part 60. The plurality of second convex parts 72 are arranged at a position separated from the second oscillation axis A2. The other of the movable body 2 and the support 3 contacts the plurality of second convex parts 72. The first convex part 71 and the plurality of second convex parts 72 are arranged on the same plane that intersects with the second oscillation axis A2. Therefore, the movable body 2 can be supported by the first convex part 71 and the plurality of second convex parts 72 arranged on the same plane. As a result, the movable body 2 can be stably supported. In addition, the same plane on which the first convex part 71 and the plurality of second convex parts 72 are arranged can be, for example, a plane including the opposing surface 61a or a plane including the lower opposing surface 31e. Further, the material of the second protrusion 72 is not particularly limited, but the second protrusion 72 is formed of, for example, ceramic, resin, or metal.

[0058] Furthermore, the position of the second convex portion 72 is constant. In other words, the second convex portion 72 does not move relative to either the movable body 2 or the support body 3. In this embodiment, the second convex portion 72 does not move relative to the support body 3. In other words, in this embodiment, even when the movable body 2 swings, the position of the second convex portion 72 relative to the support body 3 is constant. Therefore, the movable body 2 can be supported more stably.

[0059] In addition, in this embodiment, the number of second convex portions 72 is two. Therefore, since the movable body 2 is supported by three convex portions (the first convex portion 71 and the second convex portion 72), the movable body 2 can be supported more stably than when the movable body 2 is supported by four or more convex portions. Also, in this embodiment, point contact with the movable body 2 is made at three points, so the movable body 2 can be supported more stably.

[0060] The other of the movable body 2 and the support 3 has a first recess 31f recessed in the opposite direction to the first protrusion 71. The first recess 31f contacts the first protrusion 71. Therefore, by receiving the first protrusion 71 in the concave first recess 31f, it is possible to suppress the center of the first protrusion 71 from being shifted from the central axis of the first recess 31f. As a result, it is possible to suppress image blurring caused by a shift in the center of rotation. In addition, it is possible to suppress the oscillation of the movable body 2 from becoming unstable due to a shift in the center of rotation. As a result, for example, it is possible to suppress fluctuations in the current value required for oscillation.

[0061] In this embodiment, the movable body 2 has the first recess 31f, and the support body 3 has the first convex portion 71. Therefore, when the first convex portion 71 is a sphere, the movable body 2 can be assembled to the support body 3 with the sphere disposed on the second support portion 60, which facilitates the assembly work.

[0062] Next, the structure around the first support part 30 will be described in detail with reference to Fig. 8 and Fig. 9. As shown in Fig. 8 and Fig. 9, the first support part 30 has a support main body 31 and a pair of side surface parts 32. The pair of side surface parts 32 are disposed on both sides of the holder 20 in the axial direction of the first oscillation axis A1. The support main body 31 connects the pair of side surface parts 32.

[0063] The support body 31 has an upper facing surface 31a. The upper facing surface 31a faces the holder 20 in the first direction X. The upper facing surface 31a is spaced apart from the bottom surface of the holder 20.

[0064] The pair of side surface portions 32 are disposed on 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. The inner surface 32a faces the holder 20 in the third direction Z.

[0065] One of the first support part 30 and the holder 20 has a mounting groove 32b. The mounting groove 32b is recessed on the side opposite to the other of the first support part 30 and the holder 20 on the first swing axis A1. Therefore, the holder 20 and the preload part 40 can be easily attached to the first support part 30 by moving the preload part 40 along the mounting groove 32b. In this embodiment, the first support part 30 has the mounting groove 32b. The mounting groove 32b is recessed on the side opposite to the holder 20 on the first swing axis A1. The mounting groove 32b accommodates at least a portion of the preload part 40 and extends in a direction intersecting the first swing axis A1.

[0066] In this embodiment, the mounting groove 32b is disposed on the inner surface 32a. The mounting groove 32b accommodates a portion of the preload portion 40. The mounting groove 32b extends in the first direction X.

[0067] Each side surface portion 32 has a pair of support pillars 32c and a connecting portion 32d. The pair of support pillars 32c are spaced apart from each other in the second direction Y. The support pillars 32c extend in the first direction X. The connecting portion 32d connects the upper portions of the support pillars 32c to each other. The length of the connecting portion 32d in the third direction Z is shorter than the length of the support pillars 32c in the third direction Z. The pair of support pillars 32c and the connecting portion 32d form an attachment groove 32b.

[0068] Moreover, the preload portion 40 is movable along the mounting groove 32b. In this embodiment, the preload portion 40 is movable in the first direction X along the mounting groove 32b. By moving the preload portion 40 along the mounting groove 32b, the mounting portion 47 of the preload portion 40 sandwiches the connection portion 32d in the third direction Z. Thus, the preload portion 40 is fixed to the first support portion 30.

[0069] The side surface portion 32 has an outer surface 32e and an accommodating recess 32f. The outer surface 32e faces outward in the third direction Z. The accommodating recess 32f is disposed on the outer surface 32e. The accommodating recess 32f accommodates at least a part of the second magnet 121 of the second rocking mechanism 120. The side surface portion 32 has a pair of notches 32g. The notches 32g are disposed at the ends of the accommodating recess 32f in the second direction Y. The protrusions 122a of the magnet support plate 122 are disposed in the notches 32g. The magnet support plate 122 supports the second magnet 121. The notches 32g support the magnet support plate 122. The material of the magnet support plate 122 is not particularly limited, but may be, for example, a magnetic material. In this case, the magnet support plate 122 is also called a back yoke. By using the magnet support plate 122 made of a magnetic material, magnetic leakage can be suppressed.

[0070] Moreover, the other of the movable body 2 and the support body 3 has a second recess 31g. In this embodiment, the movable body 2 has the second recess 31g. Specifically, the support body 31 has a lower opposing surface 31e, a first recess 31f, and a second recess 31g. The lower opposing surface 31e faces the support body 3 in the first direction X. The first recess 31f and the second recess 31g are disposed in the lower opposing surface 31e.

[0071] The first recess 31f is disposed on the second oscillation axis A2. The first recess 31f has a part of a concave spherical surface. Therefore, since the first protrusion 71 is received by the concave spherical surface, for example, the first protrusion 71 is less likely to slip sideways within the first recess 31f. As a result, the movable body 2 can be stably supported. On the other hand, for example, if the first recess 31f has a rectangular cross section, the first protrusion 71 is likely to slip sideways relative to the first recess 31f. Also, in this embodiment, for example, unlike the case where the first protrusion 71 and the first recess 31f have a rectangular cross section, the first protrusion 71 and the first recess 31f can be easily brought into point contact.

[0072] The second recess 31g is recessed in the opposite direction to the second protrusion 72. The second recess 31g is spaced apart from the first recess 31f. That is, the second recess 31g is spaced apart from the second oscillation axis A2. A plurality of second recesses 31g are provided. In this embodiment, two second recesses 31g are provided. The two second recesses 31g are disposed at positions that are equidistant to the second oscillation axis A2. The second recess 31g has a sliding surface 31h and an inner surface 31i.

[0073] Further, the second recess 31g contacts the second protrusion 72. Specifically, the sliding surface 31h of the second recess 31g contacts the second protrusion 72. The sliding surface 31h is disposed substantially parallel to the lower opposing surface 31e. That is, the depth of the second recess 31g is substantially constant.

[0074] Also, as shown in FIG. 10, the contour of the second recess 31g is disposed outside the second convex portion 72 as viewed from the optical axis direction. Therefore, it is possible to suppress the second convex portion 72 from contacting the inner surface 31i of the second recess 31g. As a result, it is possible to suppress friction between the second convex portion 72 and the second recess 31g. Specifically, the inner surface 31i surrounds the sliding surface 31h. The inner surface 31i is separated from the second convex portion 72. That is, as viewed from the optical axis direction, the contour of the second recess 31g is separated from the second convex portion 72. Also, the inner surface 31i is disposed at a position where the second convex portion 72 does not come into contact with the inner surface 31i when the first support portion 30 is swung by the second swing mechanism 120 around the second swing axis A2.

[0075] 3 and 5A, the second convex portion 72 is disposed on the other side Y2 in the second direction Y than the first concave portion 31f. Therefore, it is possible to prevent the second convex portion 72 from contacting the reflecting surface 13 of the optical element 10. As a result, it is possible to easily secure a space for arranging the optical element 10. Also, it is possible to mount a larger optical element 10. Specifically, 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 portion 30 where the second convex portion 72 is disposed. As a result, it is possible to secure a space for arranging the optical element 10.

[0076] 11 and 12, the support 3 has a second support portion 60, a first convex portion 71, and a second convex portion 72. The support 3 preferably has an opposing surface 61a.

[0077] Specifically, the second support portion 60 supports the first support portion 30 so as to be swingable about a second oscillation axis A2 that intersects with the first oscillation axis A1. The second support portion 60 also supports the first support portion 30 in the first direction X. In other words, the second support portion 60 supports the movable body 2 in the first direction X. This makes it possible to suppress changes in the position of the optical element 10 in the first direction X, thereby suppressing changes in the position of the reflected light (light L emitted from the optical element 10) in the first direction X.

[0078] FIG. 13 is a view showing the second support portion 60 of the optical unit 1 according to this embodiment from the other side X2 of the first direction X. As shown in FIGS. 11 to 13, the second support portion 60 has a support main body 61, a pair of side surface portions 62, and a back surface portion 63. The support main body 61 has an opposing surface 61a, a first accommodating recess 61b, and at least two second accommodating recesses 61c. In this embodiment, the support main body 61 has one first accommodating recess 61b and two second accommodating recesses 61c. In this embodiment, an example in which the second support portion 60 has the first accommodating recess 61b and the second accommodating recess 61c will be described, but one of the movable body 2 and the support 3 may have a first accommodating recess and a second accommodating recess recessed in the opposite direction to the other of the movable body 2 and the support 3. In addition, for example, one of the movable body 2 and the support 3 may have a first accommodating recess, and the other of the movable body 2 and the support 3 may have a second accommodating recess.

[0079] The facing surface 61a faces the lower facing surface 31e of the first support portion 30 in the first direction X. The first accommodating recess 61b and the second accommodating recess 61c are arranged on the facing surface 61a. The first accommodating recess 61b and the second accommodating recess 61c are recessed in the opposite direction to the movable body 2 in the first direction X. That is, the first accommodating recess 61b and the second accommodating recess 61c are recessed on one side X1 in the first direction X. The first accommodating recess 61b faces the first recess 31f of the first support portion 30 in the first direction X. The first accommodating recess 61b is arranged on the same circumference C (see FIG. 13) centered on the second oscillation axis A2. The first accommodating recess 61b accommodates a part of the first protrusion 71. Therefore, the first protrusion 71 is arranged on the second oscillation axis A2.

[0080] Also, the second accommodating recess 61c is spaced apart from the first accommodating recess 61b. Therefore, the second accommodating recess 61c is spaced apart from the second oscillation axis A2. Also, in this embodiment, the second accommodating recess 61c is spaced apart from the first accommodating recess 61b at a distance. Also, the second accommodating recess 61c accommodates a part of the second convex portion 72. Therefore, the multiple second convex portions 72 are arranged on the same circumference C centered on the second oscillation axis A2. Therefore, the movable body 2 can be supported at a position that is equally spaced apart from the first convex portion 71. As a result, the movable body 2 can be supported more stably. The axial direction of the second oscillation axis A2 is along the first direction X.

[0081] Moreover, when aligned in the third direction Z, the two second accommodating recesses 61c are disposed at positions farther from the optical element 10 than the first accommodating recesses 61b.

[0082] The first accommodating recess 61b holds a portion of the first convex portion 71. In this embodiment, the lower half of the first convex portion 71 is disposed within the first accommodating recess 61b. The first convex portion 71 has at least a portion of a spherical surface. Therefore, since the first convex portion 71 is in point contact with the other of the movable body 2 and the support body 3, the frictional force between the first convex portion 71 and the other of the movable body 2 and the support body 3 can be reduced. In this embodiment, since the first convex portion 71 is in point contact with the movable body 2, the frictional force between the first convex portion 71 and the movable body 2 can be reduced.

[0083] In addition, in this embodiment, the first convex portion 71 is a sphere. Therefore, the friction between the first convex portion 71 and the first recess 31f is rolling friction. As a result, it is possible to suppress the frictional force between the first convex portion 71 and the first recess 31f from increasing. Specifically, the first convex portion 71 is rotatable within the first accommodating recess 61b. Therefore, the friction between the first convex portion 71 and the first recess 31f is rolling friction. Note that the first convex portion 71 may be fixed to the first recess 31f using, for example, an adhesive.

[0084] The second accommodating recess 61c holds a portion of the second convex portion 72. In this embodiment, the lower half of the second convex portion 72 is disposed within the second accommodating recess 61c. The second convex portion 72 has at least a portion of a spherical surface. Therefore, since the second convex portion 72 is in point contact with the other of the movable body 2 and the support body 3, the frictional force between the second convex portion 72 and the other of the movable body 2 and the support body 3 can be reduced. In this embodiment, since the second convex portion 72 is in point contact with the movable body 2, the frictional force between the second convex portion 72 and the movable body 2 can be reduced.

[0085] In addition, in this embodiment, the second convex portion 72 is a sphere. Therefore, the friction between the second convex portion 72 and the other of the movable body 2 and the support 3 is rolling friction, so that the friction force can be suppressed. In this embodiment, the friction between the second convex portion 72 and the movable body 2 is rolling friction. Specifically, the second convex portion 72 is rotatable in the second accommodating recess 61c. Therefore, the friction between the second convex portion 72 and the second recess 31g of the first support portion 30 is rolling friction. Note that the second convex portion 72 may be fixed to the second recess 31g using, for example, an adhesive.

[0086] 5C and 13, the first accommodating recess 61b may have a central recess 611. The central recess 611 is arranged concentrically with the first accommodating recess 61b. The first convex portion 71 contacts the edge of the central recess 611. The diameter of the central recess 611 is smaller than the diameter of the first convex portion 71. Therefore, for example, even if a gap is generated between the outer peripheral surface of the first convex portion 71 and the inner peripheral surface of the first accommodating recess 61b, the first convex portion 71 can be positioned by the central recess 611. That is, the center of the first convex portion 71 can be arranged on the central axis of the central recess 611. As a result, the center of the first convex portion 71 can be easily arranged on the central axis of the first accommodating recess 61b.

[0087] 5D and 13, the second accommodating recess 61c may have a central recess 611. The central recess 611 is arranged concentrically with the second accommodating recess 61c. The second convex portion 72 contacts the edge of the central recess 611. The diameter of the central recess 611 is smaller than the diameter of the second convex portion 72. Therefore, for example, even if a gap is generated between the outer peripheral surface of the second convex portion 72 and the inner peripheral surface of the second accommodating recess 61c, the second convex portion 72 can be positioned by the central recess 611. That is, the center of the second convex portion 72 can be arranged on the central axis of the central recess 611. As a result, the center of the second convex portion 72 can be easily arranged on the central axis of the second accommodating recess 61c.

[0088] Moreover, the material of the first convex portion 71 and the second convex portion 72 is ceramic. Therefore, it is possible to suppress the wear of the first convex portion 71 and the second convex portion 72. The material of the first convex portion 71 and the second convex portion 72 may be metal. In this case, it is also possible to suppress the wear of the first convex portion 71 and the second convex portion 72. Furthermore, the entire first convex portion 71 and the second convex portion 72 may be made of metal, or only the surfaces of the first convex portion 71 and the second convex portion 72 may be made of metal by, for example, plating processing. Furthermore, the first convex portion 71 and the second convex portion 72 may be made of resin.

[0089] Moreover, the first convex portion 71 is disposed on one side X1 in the first direction X with respect to the reflecting surface 13 (see FIG. 5A) of the optical element 10. Therefore, the first convex portion 71 can be disposed without blocking the optical path.

[0090] As shown in FIG. 5C, FIG. 8, and FIG. 11, the optical unit 1 has a third suction mechanism 150 arranged on one of the movable body 2 and the support 3. In this embodiment, the optical unit 1 has a pair of third suction mechanisms 150. In this embodiment, the third suction mechanism 150 has a magnet 151 arranged on one of the movable body 2 and the support 3, and a magnetic member 152 arranged on the other of the movable body 2 and the support 3. In this embodiment, the magnet 151 is an example of the "third suction magnet" of the present invention. The magnetic member 152 is an example of the "third suction magnetic member" of the present invention. The magnetic member 152 is a plate-shaped member made of a magnetic material. The magnet 151 and the magnetic member 152 overlap when viewed from the direction in which the support 3 supports the movable body 2 (first direction X). Therefore, an attractive force can be generated between the magnet 151 and the magnetic member 152 in the direction in which the support 3 supports the movable body 2.

[0091] In this way, since the magnet 151 and the magnetic member 152 overlap, a force acts between the movable body 2 and the support 3 in a direction in which they approach each other. In other words, an attractive force acts on the movable body 2 and the support 3. Therefore, when the first swing mechanism 110 and the second swing mechanism 120 are not driven, the movable body 2 is held at a reference position by the attractive force between the magnet 151 and the magnetic member 152. The reference position is a position where the side surface portion 32 of the first support portion 30 and the side surface portion 62 of the second support portion 60 are parallel to each other, as shown in FIG. 5B. In addition, the attractive force generated between the magnet 151 and the magnetic member 152 can suppress the movable body 2 from moving to the other side X2 in the first direction X. Note that the magnet 151 and the magnetic member 152 are each disposed symmetrically with respect to the second swing axis A2 in the third direction Z. Therefore, the attractive force acts symmetrically with respect to the second swing axis A2, so that the swing of the movable body 2 is stabilized. Moreover, the center of the magnet 151 and the center of the magnetic member 152 are located at the same position in the second direction Y as the first oscillation axis A1.

[0092] At least a part of one of the magnet 151 and the magnetic member 152 is disposed inside at least one of the movable body 2 and the support body 3. In this embodiment, the magnet 151 is disposed in the support body 3. The magnetic member 152 is disposed in the movable body 2.

[0093] Specifically, the movable body 2 has a storage portion 31j in which the magnetic member 152 is disposed. In this embodiment, the first support portion 30 has a pair of storage portions 31j. The storage portions 31j are disposed on the lower opposing surface 31e of the support main body 31. The storage portions 31j are recessed from the lower opposing surface 31e toward the other side X2 in the first direction X. The magnetic member 152 fits into the storage portions 31j. Therefore, the magnetic member 152 is fixed to the storage portions 31j. For example, the magnetic member 152 is fixed to the storage portions 31j by adhesive or press-fitting.

[0094] The support 3 also has a third accommodating recess 61d in which the magnet 151 is disposed. In this embodiment, the second support part 60 has a pair of third accommodating recesses 61d. The third accommodating recesses 61d are disposed on the opposing surface 61a of the support main body 61. The third accommodating recesses 61d are recessed from the opposing surface 61a toward one side X1 in the first direction X. The magnet 151 fits into the third accommodating recess 61d. Therefore, the magnet 151 is fixed to the third accommodating recess 61d. For example, the magnet 151 is fixed to the third accommodating recess 61d by adhesive or press-fitting.

[0095] 12 and 13, in the second support portion 60, a pair of side surface portions 62 are arranged at both ends of the support main 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 arranged. 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.

[0096] 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.

[0097] The FPC (Flexible Printed Circuit) 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.

[0098] 11, the FPC 80 has a substrate 81, a connection terminal 82, and a reinforcing plate 83. 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. A coil pin (not shown) of the first coil 115 is disposed in each pin insertion hole 81a.

[0099] 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.

[0100] As shown in Figures 5A and 5B, the optical unit 1 further has a first rocking mechanism 110. The first rocking mechanism 110 rocks the holder 20 relative to the first support part 30 about the first rocking axis A1. Therefore, the optical element 10 can be easily rocked about each of the two rocking axes (the first rocking axis A1 and the second rocking axis A2). The first rocking 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.

[0101] The first magnet 111 is disposed on one of the holder 20 and the second support part 60. On the other hand, the first coil 115 is disposed on the other of the holder 20 and the second support part 60. Therefore, a force acts on the first magnet 111 due to a magnetic field generated when a current flows through the first coil 115. Then, the holder 20 swings relative to the first support part 30. Therefore, the holder 20 can be swung with a simple configuration using the first magnet 111 and the first coil 115. In this embodiment, the first magnet 111 is disposed on the holder 20. The first coil 115 is disposed on the second support part 60. By disposing the first coil 115 on the second support part 60, the first coil 115 does not swing relative to the second support part 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 part 30.

[0102] 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.

[0103] 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.

[0104] 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.

[0105] The optical unit 1 further includes a second oscillation mechanism 120. The second oscillation mechanism 120 oscillates the movable body 2 relative to the support 3 about the second oscillation axis A2. Specifically, the second oscillation mechanism 120 oscillates the first support part 30 relative to the second support part 60 about the second oscillation axis A2. The second oscillation mechanism 120 includes a second magnet 121 and a second coil 125 facing the second magnet 121. The second oscillation mechanism 120 is an example of the "second oscillation mechanism" and "oscillation mechanism" of the present invention. The second coil 125 is an example of the "coil" of the present invention.

[0106] The second magnet 121 is disposed on the movable body 2 or the support 3. The second coil 125 is disposed on the support 3 or the movable body 2. In this embodiment, the second magnet 121 is disposed on one of the first support section 30 and the second support section 60. On the other hand, the second coil 125 is disposed on the other of the first support section 30 and the second support section 60. Therefore, the first support section 30 swings relative to the second support section 60 due to a magnetic field generated when a current is passed through the second coil 125. Therefore, the first support section 30 can be swung with a simple configuration using the second magnet 121 and the second coil 125. In this embodiment, the second magnet 121 is disposed on the first support section 30. The second coil 125 is disposed on the second support section 60. By disposing the second coil 125 on the second support section 60, the second coil 125 does not swing relative to the second support section 60. Therefore, compared to the case where the second coil 125 is disposed on the first support portion 30, for example, wiring for the second coil 125 can be easily performed.

[0107] Specifically, the second magnet 121 is disposed in the housing recess 32f (see FIG. 8) 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 first support portion 30 in a direction intersecting with the first direction X. In this embodiment, the second magnet 121 is disposed at the end portion 30a in the third direction Z. 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 a second direction Y intersecting with the first direction X. Therefore, the movable body 2 can be swung around the second oscillation axis A2 along the incident direction of light.

[0108] 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.

[0109] 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.

[0110] As described above, the optical unit 1 has the first attraction mechanism 210. The first attraction mechanism 210 has the second magnet 121 and the magnetic member 123. The magnetic member 123 is a plate-shaped member made of a magnetic material. The magnetic member 123 is disposed on the substrate 81. The magnetic member 123 faces the second magnet 121. When the second coil 125 is not energized, an attractive force is generated between the second magnet 121 and the magnetic member 123. Therefore, the movable body 2 is disposed at a reference position in the rotation direction about the second oscillation axis A2.

[0111] As described above, the optical unit 1 has the second suction mechanism 220. The second suction mechanism 220 has the first magnet 111 and the magnetic member 112. The magnetic member 112 is a plate-shaped member made of a magnetic material. The magnetic member 112 is disposed on the substrate 81. The magnetic member 112 faces the first magnet 111. When the first coil 115 is not energized, an attractive force is generated between the first magnet 111 and the magnetic member 112. Therefore, the movable body 2 is disposed at a reference position in the rotation direction about the first oscillation axis A1.

[0112] In this embodiment, the first rocking mechanism 110 has one of the second magnet 121 and the first magnet 111. The second rocking mechanism 120 has the other of the second magnet 121 and the first magnet 111. That is, the first rocking mechanism 110 and the second rocking mechanism 120 share a magnet between the first attraction mechanism 210 and the second attraction mechanism 220. Therefore, it is possible to suppress an increase in the number of magnet parts. Specifically, the first rocking mechanism 110 has a first magnet 111. That is, the first magnet 111 is shared by the second attraction mechanism 220 and the first rocking mechanism 110. In addition, the second rocking mechanism 120 has a second magnet 121. That is, the second magnet 121 is shared by the first attraction mechanism 210 and the second rocking mechanism 120.

[0113] In this embodiment, when viewed from the first predetermined direction, the center O123 of the magnetic member 123 is disposed on one side of the center O125 of the second coil 125 in the second predetermined direction. Also, the magnetic member 123 of the first suction mechanism 210 is disposed on the opposite side of the movable body 2 with respect to the second coil 125. Specifically, the second coil 125 is disposed on the inner surface 80a of the FPC 80. The magnetic member 123 is disposed on the outer surface 80b of the FPC 80. The inner surface 80a is a surface facing the movable body 2 side. The outer surface 80b is a surface facing the opposite side of the movable body 2. Also, the outer surface 80b is a surface facing the outside of the optical unit 1. In this way, by disposing the magnetic member 123 on the opposite side of the movable body 2 with respect to the second coil 125, it is possible to suppress interference of the magnetic member 123 with the second coil 125. Therefore, regardless of the position or size of the second coil 125, the center O123 of the magnetic member 123 can be disposed on one side in the second predetermined direction with respect to the center O121 of the second magnet 121. Note that in this embodiment, the size of the magnetic member 123 in the second predetermined direction is larger than the size of the hollow portion of the second coil 125 in the second predetermined direction.

[0114] In this embodiment, the second magnet 121 and the magnetic member 123 of the first attraction mechanism 210 and the first magnet 111 and the magnetic member 112 of the second attraction mechanism 220 are arranged on the same plane parallel to the first and second predetermined directions. Therefore, it is possible to prevent the attraction forces of the first and second attraction mechanisms 210 and 220 on the movable body 2 from acting in a direction intersecting the first and second predetermined directions. Specifically, the same plane parallel to the first and second predetermined directions is, for example, a plane perpendicular to the first direction X. Then, it is possible to prevent the attraction forces of the first and second attraction mechanisms 210 and 220 on the movable body 2 from acting in the first direction X.

[0115] As described above, in this embodiment, the optical unit 1 has the third suction mechanism 150. The third suction mechanism 150 generates a suction force along the third predetermined direction in the movable body 2. The third predetermined direction is a direction intersecting the first predetermined direction and the second predetermined direction. In this embodiment, the third predetermined direction is the first direction X. In this way, by providing the third suction mechanism 150 that generates a suction force along the third predetermined direction in the movable body 2, it is possible to suppress the movable body 2 from shifting in position in the third predetermined direction. In this embodiment, it is possible to suppress the movable body 2 from shifting in position in the first direction X.

[0116] As described above, the third attraction mechanism 150 has the magnet 151 and the magnetic member 152. Therefore, unlike the case where the third attraction mechanism 150 is configured with an elastic member such as a tension spring, the third attraction mechanism 150 can be easily attached to the movable body 2 and the support body 3.

[0117] 1, when the optical unit 1 is used in the smartphone 200, 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 preferable that the optical unit 1 is capable of detecting the attitude of the holder 20 with respect to the second support portion 60. In this case, the attitude of the holder 20 with respect to the second support portion 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.

[0118] A modified example of this embodiment will be described below with reference to Fig. 14. Below, differences from this embodiment shown in Figs. 1 to 13 will be mainly described.

[0119] (Modification) A modified example of the embodiment of the present invention will be described with reference to Fig. 14. Fig. 14 is a cross-sectional view showing the structure of an optical unit 1 according to a modified example of the present embodiment. In the modified example shown in Fig. 14, unlike the embodiment shown in Figs. 1 to 13, an example will be described in which the second magnet 121 (first attracting magnet) also serves as the third attracting mechanism 150.

[0120] 14, at least one of the second magnet 121 (first attracting magnet), the first magnet 111 (second attracting magnet), and the magnet 151 (third attracting magnet) is used in common for two or more of the first attracting mechanism 210, the second attracting mechanism 220, and the third attracting mechanism 150. This makes it possible to prevent an increase in the number of magnet parts.

[0121] In the modified example shown in FIG. 14, the second magnet 121 is used as both the first attraction mechanism 210 and the third attraction mechanism 150. Specifically, the third attraction mechanism 150 has the second magnet 121 and a magnetic member 152. The magnetic member 152 is disposed on the support 3. The magnetic member 152 is disposed on one side X1 in the first direction X with respect to the second magnet 121. The magnetic member 152 faces the second magnet 121. The magnetic member 152 faces a side surface 121c of the second magnet 121. The side surface 121c is a surface of the second magnet 121 on one side X1 in the first direction X. An attractive force is generated between the second magnet 121 and the magnetic member 152, so that a force acts on the movable body 2 on one side X1 in the first direction X. Note that, in the modified example shown in FIG. 14, the magnet 151 is not provided.

[0122] Moreover, the center O152 of the magnetic member 152 and the center O121 of the second magnet 121 are disposed at the same position as each other in the third direction Z. Moreover, the center O152 of the magnetic member 152 and the center O121 of the second magnet 121 are disposed at the same position as the first oscillation axis A1 in the second direction Y.

[0123] The above describes the embodiments of the present invention (including modified examples) with reference to the drawings. However, the present invention is not limited to the above embodiments, and can be implemented in various aspects without departing from the gist of the present invention. In addition, various inventions 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 merely 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 invention.

[0124] For example, in the above embodiment, an example has been described in which the first predetermined direction is the third direction Z, but the present invention is not limited to this. For example, the first predetermined direction may be the first direction X or the second direction Y.

[0125] In the above embodiment, the movable body 2 has the first support portion 30 that supports the holder 20 so that the holder 20 can swing, but the present invention is not limited to this. The movable body 2 does not need to have the first support portion 30. In other words, the second support portion 60 may directly support the holder 20.

[0126] In the above embodiment, the second suction mechanism 220 and the third suction mechanism 150 each have a magnet and a magnetic member, but the present invention is not limited to this. At least one of the second suction mechanism 220 and the third suction mechanism 150 may be, for example, an elastic member such as a tension spring.

[0127] In the above embodiment, an example has been shown in which the support 3 supports the movable body 2 in a direction (first direction X) along the direction in which the light L enters the optical element 10, but the present invention is not limited to this. For example, the support 3 may support the movable body 2 in a direction (second direction Y) along the direction in which the light L exits the optical element 10. In addition, the support 3 may support the movable body 2 in a direction (third direction Z) intersecting the direction in which the light L enters the optical element 10 and the direction in which it exits from the optical element 10.

[0128] In the above-described embodiment, the magnetic member 123, the magnetic member 112, and the magnetic member 152 are made of a magnetic material, but the present invention is not limited to this. For example, the magnetic member 123, the magnetic member 112, and the magnetic member 152 may be magnets.

[0129] In the above embodiment, the holder 20 is supported by the preload portion 40, but the present invention is not limited to this. The holder 20 may be supported by a support mechanism that does not apply a preload to the holder 20. For example, the holder 20 may be supported by a shaft or a support pin. [Industrial Applicability]

[0130] The present invention can be used in, for example, an optical unit. [Explanation of symbols]

[0131] 1: Optical unit 2: Movable body 3:Support 10:Optical element 20: Holder 30: 1st support part 60:Second support part 110: First rocking mechanism 111: 1st magnet (2nd attraction magnet) 112: Magnetic member (second attracting magnetic member) 120: Second rocking mechanism (rocking mechanism) 121: 2nd magnet (1st attraction magnet) 123: Magnetic member (first attracting magnetic member) 125: Second coil (coil) 150:Third suction mechanism 151: Magnet (third attraction magnet) 152: Magnetic member (third attracting magnetic member) 210: 1st suction mechanism 220:Second suction mechanism A2: Second swing axis (swing axis) L: light O111, O112, O121, O123, O125: Center X: 1st direction X1: One side Y: Second direction Y1: One side Z: 3rd direction

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 first suction mechanism that generates a suction force on the movable body between the movable body and the support; having the first attraction mechanism includes a first attraction magnet and a first attraction magnetic member, One of the first attracting magnet and the first attracting magnetic member is disposed on the movable body, the other of the first attracting magnet and the first attracting magnetic member is disposed on the support; When viewed from a first predetermined direction, the first attracting magnet and the first attracting magnetic member overlap each other, the first predetermined direction is any one of the first direction, the second direction, and the third direction, the third direction intersects with the first direction and the second direction, When viewed from the first predetermined direction, the center of the first attracting magnet and the center of the first attracting magnetic member are spaced apart from each other.

2. a second suction mechanism for generating a suction force on the movable body between the movable body and the support body, the second attraction mechanism includes a second attraction magnet and a second attraction magnetic member, One of the second attracting magnet and the second attracting magnetic member is disposed on the movable body, the other of the second attracting magnet and the second attracting magnetic member is disposed on the support; a center of the other of the first attracting magnet and the first attracting magnetic member is disposed on one side of a center of one of the first attracting magnet and the first attracting magnetic member in a second predetermined direction intersecting with the first predetermined direction, The optical unit according to claim 1 , wherein a center of the other of the second attracting magnet and the second attracting magnetic member is disposed on the other side in the second predetermined direction relative to a center of one of the second attracting magnet and the second attracting magnetic member.

3. the movable body includes a holder that holds the optical element and a first support that supports the holder so that the holder can swing; The support body has a second support portion that supports the first support portion so as to be able to swing, one of the first attracting magnet and the first attracting magnetic member is disposed on the first support portion, the other of the first attracting magnet and the first attracting magnetic member is disposed on the second support portion, one of the second attracting magnet and the second attracting magnetic member is disposed in the holder; The optical unit according to claim 2 , wherein the other of the second attracting magnet and the second attracting magnetic member is disposed on the second support portion.

4. a first swing mechanism that swings the holder relative to the first support portion; a second swing mechanism that swings the first support portion relative to the second support portion; and the first swing mechanism has one of the first attracting magnet and the second attracting magnet, The optical unit according to claim 3 , wherein the second swing mechanism has the other of the first attracting magnet and the second attracting magnet.

5. The present invention further includes a swing mechanism that swings the movable body relative to the support body about the swing axis, the swing mechanism includes the first attracting magnet and a coil facing the first attracting magnet, the first attractive magnetic member is disposed on an opposite side of the coil from the movable body, 4. The optical unit according to claim 2, wherein a center of the first attractive magnetic member is disposed on one side in the second predetermined direction with respect to a center of the coil when viewed from the first predetermined direction.

6. 6. The optical unit according to claim 2, wherein the first attracting magnet, the first attracting magnetic member, the second attracting magnet, and the second attracting magnetic member are arranged on the same plane parallel to the first predetermined direction and the second predetermined direction.

7. 7. The optical unit according to claim 2, further comprising a third suction mechanism that generates a suction force on the movable body along a third predetermined direction that intersects with the first predetermined direction and the second predetermined direction between the movable body and the support body.

8. The optical unit according to claim 7 , wherein the third attraction mechanism includes a third attraction magnet and a third attraction magnetic member.

9. 9. The optical unit according to claim 8, wherein at least one of the first suction magnet, the second suction magnet, and the third suction magnet is used in combination with two or more of the first suction mechanism, the second suction mechanism, and the third suction mechanism.

10. The optical unit according to claim 1 , wherein the first predetermined direction is the third direction.

11. The swing axis extends along one of the first direction and the second direction, 11. The optical unit according to claim 1, wherein the support supports the movable body in an axial direction of the oscillation axis.

Images