Optical unit

Abstract

To suppress deterioration in the efficacy of a magnetic spring, the deterioration occurring in association with attitude change of a prism holder relative to a stationary body.SOLUTION: An optical unit is provided, comprising: a stationary body 300; a movable body 21 which revolves around a first axis C1 with respect to the stationary body 300; a prism holder 20 which has a prism 10, and which revolves around a second axis C2 with respect to the movable body 21; and a magnetic spring S which suppresses the revolving of the prism holder 20 with respect to the movable body revolving around the second axis C2. In the optical unit, the magnetic spring S has one of a magnet 40 and a magnetic body 42 in the movable body 21 and has the other of the magnet 40 and the magnetic body 42 in the prism holder 20.SELECTED DRAWING: Figure 8

Description

[Technical field]

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

[0002] Conventionally, various optical units including a prism holder having a prism and a fixed body have been used. Among them, for example, as disclosed in Patent Document 1, there is an optical unit in which the prism holder can be rotated with respect to the fixed body about a first axis as the rotation axis and also about a second axis intersecting the first axis as the rotation axis. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2022-96140 Summary of the Invention [Problem to be solved by the invention]

[0004] In an optical unit such as the optical unit of Patent Document 1, in which the prism holder can be rotated with respect to the fixed body around a first axis as the rotation axis and also around a second axis intersecting the first axis as the rotation axis, a magnetic spring may be provided to prevent the prism holder from rotating inadvertently with respect to the fixed body. However, in a conventional optical unit with such a configuration, the positions of the magnet and magnetic body constituting the magnetic spring may be far from the initial state, or the positions of the magnet and magnetic body may become farther apart as the prism holder is displaced with respect to the fixed body. When the positions of the magnet and magnetic body constituting the magnetic spring become farther apart, the effect of the magnetic spring is reduced. [Means for solving the problem]

[0005] The optical unit of the present invention comprises a fixed body, a movable body which rotates relative to the fixed body about a first axis as a rotation axis, a prism holder which has a prism and rotates relative to the movable body about a second axis which intersects the first axis as a rotation axis, and a magnetic spring which suppresses rotation of the prism holder relative to the movable body about the second axis as a rotation axis, wherein the magnetic spring has one of a magnet or a magnetic material in the movable body, and the other of the magnet or the magnetic material in the prism holder. Effect of the Invention

[0006] The optical unit of the present invention can suppress a decrease in the effectiveness of the magnetic spring that occurs when the position of the prism holder changes relative to the fixed body. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a perspective view of a smartphone equipped with an optical unit according to a first embodiment of the present invention. [Diagram 2] FIG. 1 is a schematic diagram of an optical unit according to a first embodiment of the present invention. [Diagram 3] FIG. 1 is a perspective view of an optical unit according to a first embodiment of the present invention. [Figure 4] FIG. 2 is a plan view of the optical unit according to the first embodiment of the present invention. [Diagram 5] FIG. 2 is a perspective view of the optical unit according to the first embodiment of the present invention with the cover removed. [Figure 6] FIG. 1 is a plan view of an optical unit according to a first embodiment of the present invention with a cover removed. [Figure 7] 1 is a cross-sectional view of an optical unit according to a first embodiment of the present invention, as viewed from the rear side. [Figure 8] FIG. 2 is a side cross-sectional view of the periphery of a roll holder of the optical unit according to the first embodiment of the present invention, showing a state in which a prism holder is in an initial state relative to the roll holder. [Figure 9] 4 is a side cross-sectional view of the periphery of the roll holder of the optical unit according to the first embodiment of the present invention, illustrating a state in which the prism holder has rotated to one side relative to the roll holder with respect to a second axis. FIG. [Figure 10]4 is a side cross-sectional view of the periphery of the roll holder of the optical unit according to the first embodiment of the present invention, illustrating a state in which the prism holder has rotated to the other side with respect to the roll holder about a second axis. FIG. [Figure 11] FIG. 1 is a perspective cross-sectional view of an optical unit according to a first embodiment of the present invention. [Figure 12] FIG. 2 is a perspective view of a roll holder of the optical unit according to the first embodiment of the present invention, as viewed from the bottom side. [Figure 13] FIG. 2 is a perspective view of a case of the optical unit according to the first embodiment of the present invention. [Figure 14] FIG. 2 is a plan sectional view of the periphery of a roll holder of the optical unit according to the first embodiment of the present invention, showing a state in which the roll holder is in an initial state relative to the case. [Figure 15] FIG. 2 is a plan sectional view of the periphery of a roll holder of the optical unit according to the first embodiment of the present invention, illustrating a state in which the roll holder has been rotated to one side with respect to the case about a first axis. [Figure 16] 2 is a plan sectional view of the periphery of a roll holder of the optical unit according to the first embodiment of the present invention, illustrating a state in which the roll holder has been rotated to the other side with respect to a first axis. FIG. [Figure 17] FIG. 2 is a perspective cross-sectional view of the optical unit according to the first embodiment of the present invention, illustrating the periphery of a first contact portion. [Figure 18] FIG. 2 is a perspective cross-sectional view of the optical unit according to the first embodiment of the present invention, illustrating the periphery of a second contact portion. [Figure 19] FIG. 2 is a perspective cross-sectional view of the optical unit according to the first embodiment of the present invention, illustrating the periphery of a second fitting portion. [Figure 20] FIG. 2 is a perspective cross-sectional view of the optical unit according to the first embodiment of the present invention, illustrating the periphery of a second recess of a second fitting portion. [Figure 21] FIG. 2 is a perspective cross-sectional view of the optical unit according to the first embodiment of the present invention, illustrating the arrangement of a second convex portion and a second concave portion of a second fitting portion. [Figure 22] FIG. 11 is a cross-sectional view of an optical unit according to a second embodiment of the present invention, as viewed from the rear side. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] [Example 1] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In each figure, the X-axis, Y-axis, and Z-axis are perpendicular to each other, and the views seen in the +X and -X directions are side views, the views seen in the +Y direction are plan views, the views seen in the -Y direction are bottom views, the views seen in the +Z direction are rear views, and the views seen in the -Z direction are front views. The +Y direction corresponds to the incident direction D1 of the light beam from outside.

[0009] <Outline of device equipped with optical unit> 1 is a schematic perspective view of a smartphone 100 as an example of a device including an optical unit 1 according to a first embodiment of the present invention. The optical unit 1 according to this embodiment can be preferably used in the smartphone 100. This is because the optical unit 1 according to this embodiment can be configured to be thin, and the thickness of the smartphone 100 in the Y-axis direction can be configured to be thin. However, the optical unit 1 according to this embodiment is not limited to the smartphone 100, and can be used in various devices such as cameras and videos without any particular limitation.

[0010] 1, the smartphone 100 includes a lens 101 that receives a light beam. The lens 101 in the smartphone 100 includes an optical unit 1 inside. The smartphone 100 is configured such that a light beam is incident from the outside in an incident direction D1 through the lens 101, and a subject image can be captured based on the incident light beam.

[0011] <Overall configuration of optical unit> FIG. 2 is a side view that shows the optical unit 1 of the present embodiment. As shown in FIG. 2, the optical unit 1 of the present embodiment includes a fixed body 300, a prism holder 20 having a prism 10, and a camera 200 having a substrate 220 on which an image sensor 221 is provided and a housing part 210 on which a lens 211 is provided. The prism holder 20 receives a light beam from the outside in an incident direction D1 through a lens 101 at an incident surface 10b, reflects the incident light beam at a reflecting surface 10a of the prism 10, and emits the incident light beam from an exit surface 10c in a reflection direction D2 toward the image sensor 221. The incident direction D1 is a direction along the Y-axis direction, and the reflection direction D2 is a direction along the Z-axis direction.

[0012] The optical unit 1 of this embodiment is configured to be capable of rotating the camera 200 with the direction along the incident direction D1 (Y-axis direction) as the rotation axis relative to the fixed body 300. In addition, although details will be described later, the prism holder 20 is capable of rotating with the X-axis direction as the rotation axis (rotation in the pitch direction) relative to the fixed body 300 and rotating with the Y-axis direction as the rotation axis (rotation in the roll direction). However, the prism holder 20 may also be configured to rotate with the Z-axis direction as the rotation axis (rotation in the yaw direction) relative to the fixed body 300.

[0013] <Internal structure of the optical unit and the positional relationship of the prism holder to the fixed body> The internal configuration of the optical unit 1 of this embodiment and the positional relationship of the prism holder 20 with respect to the fixed body 300 will be described in further detail below with reference to Figures 3 to 21. As described above, the optical unit 1 of this embodiment includes the fixed body 300. In detail, the optical unit 1 of this embodiment includes, as the fixed body 300, a cover 301 shown in Figures 3 and 4 and a case 302 shown in Figures 5 and 6, etc.

[0014] 5 to 7, the apparatus further includes a prism holder 20 having a prism 10, and a roll holder 21 that holds the prism holder 20. Here, the roll holder 21 serves as a movable body that rotates in the roll direction with a first axis C1 along the Y-axis as a rotation axis relative to the fixed body 300, as shown in Figs.

[0015] Specifically, as shown in Figures 6 and 7, magnets 40 (magnets 40A and 40B) are provided at both ends in the X-axis direction of the roll holder 21. Then, as shown in Figures 7 and 12, coils 41 (coils 41A and 41B) connected to the flexible printed circuit board F are provided at positions facing the magnets 40A and 40B in the case 302 of the fixed body 300.

[0016] 13 and the like, case 302 is provided with sphere arrangement section 54 in which sphere 57 is arranged, and as shown in Fig. 12 and the like, metal plate 50 is arranged on the bottom of roll holder 21 and recess 51 recessed in the -Y direction is formed in metal plate 50, and sphere 57 fits into recess 51 as shown in Fig. 7 and Fig. 11 and the like. Here, as shown in Fig. 13 and the like, optical unit 1 of this embodiment has sphere arrangement section 54A, sphere arrangement section 54B and sphere arrangement section 54C as sphere arrangement section 54, and sphere 57A is arranged in sphere arrangement section 54A, sphere 57B is arranged in sphere arrangement section 54B, and sphere 57C is arranged in sphere arrangement section 54C.

[0017] 12 and the like, the optical unit 1 of this embodiment has recesses 51A, 51B, and 51C as recesses 51, and is configured such that a sphere 57A fits into recess 51A, a sphere 57B fits into recess 51B, and a sphere 57C fits into recess 51C. Here, recess 51A is a perfect circular hole into which sphere 57A fits with almost no gap, while recess 51B and recess 51C are arc-shaped elongated holes centered on the position of recess 51A. Therefore, the roll holder 21 is configured to be able to rotate in the roll direction with a first axis C1 along the Y-axis as a rotation axis relative to the fixed body 300 based on the position of recess 51A.

[0018] As shown in FIG. 13, the case 302 is provided with magnet fixing parts 53 (magnet fixing parts 53A, 53B, and 53C), and has magnets 52A fixed to magnet fixing part 53A, magnet 52B fixed to magnet fixing part 53B, and magnet 52C fixed to magnet fixing part 53C. The metal plate 50 is attracted to the case 302 by these magnets 52. That is, the magnet 52 and the metal plate 50 constitute an attracting magnetic spring. The optical unit 1 of this embodiment is configured as described above, and by passing electricity through the coils 41A and 41B, the roll holder 21 can be rotated about the first axis C1 as a rotation axis relative to the fixed body 300.

[0019] Furthermore, a magnetic body 42A is provided as the magnetic body 42 on the -X direction side of the coil 41A, and a magnetic body 42B is provided as the magnetic body 42 on the +X direction side of the coil 41B. The magnetic body 42A and the magnet 40A form a magnetic spring S, and the magnetic body 42B and the magnet 40B form a magnetic spring S. The magnetic spring S suppresses inadvertent rotation of the roll holder 21 relative to the fixed body 300, and stabilizes the posture of the roll holder 21 relative to the fixed body 300.

[0020] 7 and 20, the optical unit 1 of this embodiment has a bearing plate 44 attached to the prism holder 20 and having a recess 44b recessed inward in the X-axis direction. As shown in FIG. 7, the optical unit 1 of this embodiment has a fitting plate 43 (fitting plate 43A and fitting plate 43B) attached to the roll holder 21 and having a protrusion 43b protruding inward in the X-axis direction that can be fitted into the recess 44b. By fitting the protrusion 43b of the fitting plate 43A and the fitting plate 43B into the recess 44b of the bearing plate 44, these positions are used as the rotation axis of the second axis C2 along the X-axis, and the prism holder 20 can be rotated in the pitch direction relative to the roll holder 21.

[0021] 8 to 10, in the optical unit 1 of this embodiment, a magnet 40 (magnet 40C) is provided at the end of the prism holder 20 in the +Z direction. A coil 41 (coil 41C) connected to the flexible printed circuit board F is provided at a position facing the magnet 40C in the case 302 of the fixed body 300. With this configuration, the optical unit 1 of this embodiment can rotate the prism holder 20 relative to the fixed body 300 and the roll holder 21 about the second axis C2 as the rotation axis by passing electricity through the coil 41C.

[0022] 8 to 10, a magnetic body 42C is provided as a magnetic body 42 near the magnet 40C of the roll holder 21. The magnetic body 42C and the magnet 40C constitute a magnetic spring S. The magnetic spring S suppresses inadvertent rotation of the prism holder 20 relative to the roll holder 21, and stabilizes the position of the prism holder 20 relative to the roll holder 21.

[0023] As described above, the optical unit 1 of this embodiment includes the roll holder 21 which is a movable body that rotates about the first axis C1 relative to the fixed body 300, the prism holder 20 which has the prism 10 and rotates about the second axis C2 intersecting the first axis C1 relative to the roll holder 21, and the magnetic spring S which suppresses the rotation of the prism holder 20 about the second axis C2 relative to the roll holder 21. The magnetic spring S has a magnetic body 42 in the roll holder 21 and a magnet 40 in the prism holder 20.

[0024] In this manner, the optical unit 1 of this embodiment includes the roll holder 21 that holds the prism holder 20 and rotates about the first axis C1 relative to the fixed body 300. The magnetic spring S has one of the magnet 40 or the magnetic body 42 in the roll holder 21, and the other of the magnet 40 or the magnetic body 42 in the prism holder 20. With this configuration, the magnet 40 and the magnetic body 42 can be arranged closer to each other than in a configuration without the roll holder 21, in which the magnet 40 or the magnetic body 42 is in the fixed body 300, and the other of the magnet 40 or the magnetic body 42 is in the prism holder 20. Therefore, it is possible to suppress a decrease in the effectiveness of the magnetic spring S due to a change in the posture of the prism holder 20 relative to the fixed body 300. Furthermore, with this configuration, even if the prism holder 20 rotates with the first axis C1 as the rotation axis relative to the fixed body 300, the positional relationship between the prism holder 20 and the roll holder 21 does not change, so the magnet 40 and the magnetic body 41 can continue to be positioned close to each other.

[0025] In the optical unit 1 of this embodiment, a coil 41C is provided on the fixed body 300. The coil 41C, together with the magnet 40C, forms a drive unit that rotates the prism holder 20 relative to the roll holder 21 around the second axis C2 as the rotation axis. This configuration eliminates the need to separately provide the magnet 40 forming the drive unit and the magnet 40 forming the magnetic spring S, making it possible to reduce the size and cost of the optical unit 1.

[0026] In addition, as in the optical unit 1 of this embodiment, if the roll holder 21, which is a movable body, moves too much relative to the fixed body 300 and collides with the fixed body 300 with a strong impact force, there is a risk that the fixed body 300 and the roll holder 21 will be damaged. Therefore, in the optical unit 1 of this embodiment, in order to prevent the roll holder 21 from colliding with the fixed body 300 with a strong impact force, a first regulating portion 61 that regulates the movement of the roll holder 21 relative to the fixed body 300 is provided. With this configuration, it is possible to prevent the roll holder 21 from moving too much relative to the fixed body 300, causing the roll holder 21 to come off the fixed body 300, or to prevent the fixed body 300 and the roll holder 21 from being damaged. The details of the first regulating portion 61 will be described below.

[0027] In the optical unit 1 of this embodiment, as shown in FIG. 12, the metal plate 50 is provided with a first convex portion 56 that protrudes in the +Y direction. Also, as shown in FIG. 13, the case 302 of the fixed body 300 is provided with a first concave portion 55 that is concave in the +Y direction. The first convex portion 56 is fitted into the first concave portion 55. That is, the first concave portion 55 and the first convex portion 56 form a first restricting portion 61. However, the first concave portion 55 is configured to be larger than the first convex portion 56, and the roll holder 21 is configured to be rotatable about the first axis C1 as a rotation axis by a desired rotation amount relative to the fixed body 300, and is configured to restrict rotation exceeding the desired rotation amount and movement in a direction other than the rotation direction.

[0028] That is, the optical unit 1 of this embodiment has a first fitting portion (first recess 55 and first convex portion 56) as a first restricting portion 61, and the first fitting portion has the first recess 55 in the fixed body 300 and the first convex portion 56 in the roll holder 21, and is configured so that the first convex portion 55 and the first concave portion 56 fit together. In this manner, one of the first convex portion 56 or the first concave portion 55 is in the fixed body 300, and the other of the first convex portion 56 or the first concave portion 55 is in the roll holder 21, and the first convex portion 56 and the first concave portion 55 fit together, so that the movement of the roll holder 21 relative to the fixed body 300 can be suitably restricted by the first convex portion 56 and the first concave portion 55. In this embodiment, the first concave portion 56 is a groove shape that does not penetrate in the Y-axis direction, but the first concave portion 56 may be an elongated hole shape that penetrates in the Y-axis direction.

[0029] Further, as shown in Fig. 6, Fig. 12, Fig. 14 to Fig. 16, etc., the optical unit 1 of this embodiment includes a protrusion 21a provided on the roll holder 21, which is configured to protrude in an arc shape toward the fixed body 300 when viewed from the direction along the first axis C1. As shown in Fig. 6, it can be seen that the provision of the protrusion 21a shortens the distance L1 between the roll holder 21 and the fixed body 300 along the Z axis direction, and the collision force is weakened even if the roll holder 21 and the fixed body 300 collide. With this configuration, it is possible to restrict the movement of the roll holder 21 in the +Z direction relative to the fixed body 300 while suppressing interference between the fixed body 300 and the roll holder 21 even if the roll holder 21 rotates relative to the fixed body 300 with the first axis C1 as the rotation axis.

[0030] Furthermore, the optical unit 1 of this embodiment includes a first restricting portion 61 that restricts movement of the roll holder 21 relative to the fixed body 300, and also a second restricting portion 62 that restricts movement of the prism holder 20 relative to the roll holder 21. With this configuration, it is possible to prevent the prism holder 20 from moving too far relative to the roll holder 21, causing the prism holder 20 to come off from the roll holder 21, or to prevent the roll holder 21 and the prism holder 20 from being damaged.

[0031] Specifically, the optical unit 1 of this embodiment has a second fitting portion (second convex portion 43a and second recessed portion 44a) as the second regulating portion 62, as shown in Fig. 19 to Fig. 21 and the like. The second fitting portion has the second convex portion 43a on the roll holder 21, and the second recessed portion 44a on the prism holder 20, and is configured so that the second convex portion 43a and the second recessed portion 44a fit together. In this manner, one of the second convex portion 43a or the second recessed portion 44a is on the roll holder 21, and the other of the second convex portion 43a or the second recessed portion 44a is on the prism holder 20, and the second convex portion 43a and the second recessed portion 44a fit together, so that the movement of the prism holder 20 relative to the roll holder 21 can be suitably regulated by the second convex portion 43a and the second recessed portion 44a. In this embodiment, the second recess 44a is an elongated hole penetrating in the X-axis direction, but the first recess 44a may be a groove that does not penetrate in the X-axis direction.

[0032] As shown in FIG. 20 and other figures, in the optical unit 1 of this embodiment, the second recess 44a is C-shaped when viewed from the direction along the second axis C2. With this configuration, even if the prism holder 20 rotates relative to the roll holder 21 around the second axis C2 as a rotation axis, it is possible to restrict the movement of the prism holder 20 relative to the roll holder 21 while suppressing interference between the roll holder 21 and the prism holder 20. In this embodiment, the second restricting portion 62 consisting of the second convex portion 43a and the second recess 44a is configured to restrict the movement of the prism holder 20 relative to the roll holder 21 in the Z-axis direction, but it is also possible to restrict the prism holder 20 from moving too far in the arc direction relative to the roll holder 21 by shortening the length of the C-shaped region of the second recess 44a in the arc direction.

[0033] Furthermore, the optical unit 1 of this embodiment also includes, as the second regulating portion 62, a first degree contact portion which is a combination of a degree contact portion 20b provided on the prism holder 20 and a degree contact portion 21b provided on the roll holder 21 as shown in Fig. 17, and a second degree contact portion which is a combination of a degree contact portion 20c provided on the prism holder 20 and a degree contact portion 21c provided on the roll holder 21 as shown in Fig. 18. Therefore, the optical unit 1 of this embodiment can particularly effectively prevent the prism holder 20 from coming off the roll holder 21 due to excessive movement of the prism holder 20 relative to the roll holder 21, or damage to the roll holder 21 and the prism holder 20.

[0034] [Example 2] Next, the optical unit 1 of Example 2 will be described with reference to FIG. 22. FIG. 22 is a view corresponding to FIG. 7 of the optical unit 1 of Example 1. In FIG. 22, components common to Example 1 are indicated by the same reference numerals, and detailed description will be omitted. Here, the optical unit 1 of this example has the same configuration as the optical unit 1 of Example 1, except for the portions described below. Therefore, except for the portions described below, the optical unit 1 of this example has the same characteristics as the optical unit 1 of Example 1.

[0035] 22, in the optical unit 1 of this embodiment, a magnet 52D is fixed to a magnet fixing portion 53D of the roll holder 21, and a magnet 52E is fixed to a magnet fixing portion 53E of the roll holder 21. The area of ​​the case 302 of the fixing portion 300 facing the magnets 52D and 52E is made of a metal plate 302A which is a magnetic material, and the area around the metal plate 302A which overlaps with the magnets 40A and 40B in the Y-axis direction is made of a resin plate 302B which is a non-magnetic material. The metal plate 302A, the magnet 52D, and the magnet 52E constitute an attractive magnetic spring Ss.

[0036] In other words, the optical unit 1 of this embodiment includes an attractive magnetic spring Ss that attracts the fixed body 300 and the roll holder 21, which is a movable body. The attractive magnetic spring Ss includes magnets 40A and 40B that are magnets for the attractive magnetic spring provided in the roll holder 21, and a metal plate 302A that is a magnetic body for the attractive magnetic spring provided in a position facing the magnets for the attractive magnetic spring (magnets 40A and 40B) of the fixed body 300. Furthermore, the fixed body 300 is formed of a resin plate 302B that is a non-magnetic body around the magnetic body for the attractive magnetic spring (metal plate 302A). The optical unit 1 of this embodiment is configured in this way to configure an attractive magnetic spring Ss that is not affected by the magnets 40A and 40B.

[0037] The optical unit 1 of this embodiment is configured such that the roll holder 21 can rotate in the roll direction with the first axis C1 along the Y axis as the rotation axis relative to the fixed body 300 with the sphere 57A as a reference. Although not shown in Fig. 22, the roll holder 21 and the fixed body 300 are provided with configurations corresponding to the recesses 51B and 51C, the spheres 57B and 57C, and the sphere arrangement portions 54B and 54C of the optical unit 1 of the first embodiment.

[0038] 22, the optical unit 1 of this embodiment is different from the optical unit 1 of the first embodiment in that it does not have the metal plate 50 as a component of the attractive magnetic spring Ss. The recesses 51A, 51B, and 51C are provided on the bottom surface (the surface on the +Y direction side) of the roll holder 21. Therefore, since the optical unit 1 of this embodiment does not have the metal plate 50 between the fixed body 300 and the roll holder 21 which is the movable body, the length in the Y axis direction is short, and the optical unit 1 of this embodiment is smaller in size than the optical unit 1 of the first embodiment.

[0039] 7 and 22, in the optical unit 1 of this embodiment, the magnet 40A and the fitting plate 43A, and the magnet 40B and the fitting plate 43B are arranged closer to each other than in the optical unit 1 of the first embodiment. Specifically, in the optical unit 1 of this embodiment, the magnet 40A and the fitting plate 43A, and the magnet 40B and the fitting plate 43B are directly attached to each other. Due to this configuration, the optical unit 1 of this embodiment has a short length in the X-axis direction and is smaller in size than the optical unit 1 of the first embodiment.

[0040] Finally, the present invention is generally described below. (1) An optical unit comprising: a fixed body; a movable body which rotates relative to the fixed body about a first axis as a rotation axis; a prism holder which has a prism and rotates relative to the movable body about a second axis which intersects the first axis as a rotation axis; and a magnetic spring which suppresses rotation of the prism holder relative to the movable body about the second axis as a rotation axis, wherein the magnetic spring has one of a magnet or a magnetic material in the movable body, and the other of the magnet or the magnetic material in the prism holder.

[0041] (2) In the optical unit described in (1) above, the fixed body has a coil, and the coil, together with the magnet, forms a drive unit that rotates the prism holder relative to the movable body with the second axis as a rotation axis.

[0042] (3) The optical unit according to the above (1) or (2), further comprising a first restricting portion that restricts movement of the movable body relative to the fixed body.

[0043] (4) The optical unit according to (3) above, further comprising a first fitting portion as the first regulating portion, the first fitting portion having one of a first convex portion or a first concave portion in the fixed body, and the other of the first convex portion or the first concave portion in the movable body, and configured so that the first convex portion and the first concave portion are fitted together.

[0044] (5) The optical unit according to (3) or (4) above, further comprising a protrusion provided on the movable body as the first regulating portion, the protrusion being configured to protrude in an arc shape toward the fixed body when viewed from a direction along the first axis.

[0045] (6) In the optical unit described in any one of (1) to (5) above, the optical unit described in claim 1 or 2 is characterized in that it is provided with a second regulating portion that regulates the movement of the prism holder relative to the movable body.

[0046] (7) In the optical unit described in (6) above, a second fitting portion is provided as the second restricting portion, The optical unit is characterized in that the second fitting portion has one of a second convex portion or a second concave portion on the movable body, and the other of the second convex portion or the second concave portion on the prism holder, and is configured so that the second convex portion and the second concave portion are fitted together.

[0047] (8) The optical unit according to (7) above, wherein the second recess is C-shaped when viewed from a direction along the second axis.

[0048] (9) The optical unit described in any one of (1) to (8) above is characterized in that the optical unit described in is provided with an attractive magnetic spring that attracts the fixed body and the movable body, the attractive magnetic spring having a magnet for the attractive magnetic spring provided on the movable body, a magnetic body for the attractive magnetic spring provided on the fixed body in a position facing the magnet for the attractive magnetic spring, and the fixed body has a non-magnetic body surrounding the magnetic body for the attractive magnetic spring. [Explanation of symbols]

[0049] 1...optical unit, 10...prism, 10a...reflection surface, 10b...entrance surface, 10c...exit surface, 20...prism holder, 20b...degree contact portion, 20c...degree contact portion, 21...roll holder (movable body), 21a...protrusion, 21b...covered portion, 21c...covered portion, 40...magnet, 40A...magnet, 40B...magnet, 40C...magnet, 41...coil, 41A...coil, 41B...coil, 41C...coil, 42...magnetic body, 42A... Magnetic body, 42B...magnetic body, 42C...magnetic body, 43...fitting plate, 43A...fitting plate, 43B...fitting plate, 43a...second convex portion, 43b...convex portion, 44...bearing plate, 44a...second concave portion, 44b...convex portion, 50...metal plate, 51...convex portion, 51A...convex portion, 51B...convex portion, 51C...convex portion, 52...magnet, 52A...magnet, 52B...magnet, 52C...magnet, 52D...magnet (magnet for attractive magnetic spring), 52E... Magnet (magnet for attractive magnetic spring), 53...magnet fixing portion, 53A...magnet fixing portion, 53B...magnet fixing portion, 53C...magnet fixing portion, 53D...magnet fixing portion, 53E...magnet fixing portion, 54...sphere arrangement portion, 54A...sphere arrangement portion, 54B...sphere arrangement portion, 54C...sphere arrangement portion, 55...first recess, 56...first protrusion, 57...sphere, 57A...sphere, 57B...sphere, 57C...sphere, 61...first restriction portion, 62...second restriction portion, 100...smart Phone, 101...lens, 200...camera, 210...housing, 211...lens, 220...substrate, 221...imaging element, 300...fixed body, 301...cover, 302...case, 302A...metal plate (magnetic material for magnetic spring), 302B...resin plate (non-magnetic material), C1...first axis, C2...second axis, D1...incident direction, D2...reflection direction, F...flexible printed circuit board, S...magnetic spring, Ss...attractive magnetic spring

Claims

1. A fixed body; a movable body that rotates relative to the fixed body about a first axis; a prism holder having a prism and rotating with respect to the movable body about a second axis intersecting the first axis; a magnetic spring that suppresses rotation of the prism holder relative to the movable body about the second axis; Equipped with An optical unit, wherein the magnetic spring has one of a magnet or a magnetic body on the movable body, and the other of the magnet or the magnetic body on the prism holder.

2. 2. The optical unit according to claim 1, The stationary body has a coil, The coil, together with the magnet, forms a drive unit that rotates the prism holder relative to the movable body with the second axis as a rotation axis.

3. 3. The optical unit according to claim 1, An optical unit comprising: a first restricting portion that restricts movement of the movable body relative to the fixed body.

4. 4. The optical unit according to claim 3, The first restricting portion has a first fitting portion, The first fitting portion has one of a first convex portion or a first concave portion on the fixed body, and the other of the first convex portion or the first concave portion on the movable body, and is configured so that the first convex portion and the first concave portion are fitted together.

5. 4. The optical unit according to claim 3, The first restricting portion includes a protrusion provided on the movable body, The optical unit is characterized in that the protrusion is configured to protrude in an arc shape toward the fixed body when viewed in a direction along the first axis.

6. 3. The optical unit according to claim 1, an optical unit comprising: a second restricting portion that restricts movement of the prism holder relative to the movable body;

7. 7. The optical unit according to claim 6, The second restricting portion has a second fitting portion, The optical unit is characterized in that the second fitting portion has one of a second convex portion or a second concave portion on the movable body, and the other of the second convex portion or the second concave portion on the prism holder, and is configured so that the second convex portion and the second concave portion are fitted together.

8. 8. The optical unit according to claim 7, The optical unit according to claim 1, wherein the second recess is C-shaped when viewed from a direction along the second axis.

9. 3. The optical unit according to claim 1, an attracting magnetic spring that attracts the fixed body and the movable body; The attractive magnetic spring is provided with a magnet for the attractive magnetic spring on the movable body, and a magnetic body for the attractive magnetic spring is provided on the fixed body at a position facing the magnet for the attractive magnetic spring, The optical unit is characterized in that the fixed body has a periphery of the magnetic body for the attracting magnetic spring formed of a non-magnetic body.

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