Optical unit

Abstract

An optical unit is provided. The optical unit has a movable body, a support body, an oscillation mechanism, and a magnetic member. The movable body has an optical element. The optical element reflects light traveling in one side of a first direction to one side of a second direction intersecting the first direction. The support body supports the movable body so that the movable body can oscillate around an oscillation axis. The oscillation mechanism causes the movable body to oscillate around the oscillation axis. The magnetic member is disposed on the support body. The oscillation mechanism has a magnet and a coil. The magnet is disposed at an end portion of the movable body in a direction intersecting the first direction. The coil opposes the magnet. The magnetic member is disposed on one side of the first direction with respect to the magnet.

Description

TECHNICAL FIELD

[0001] The present application relates to an optical unit. BACKGROUND

[0002] When a still image or a moving image is captured with a camera, image blur sometimes occurs due to hand shake. Moreover, a hand shake correction device that enables clear photography by suppressing image blur is being put into practical use. The hand shake correction device corrects the posture of a camera module according to hand shake in the case where the camera shakes, thereby suppressing image blur (for example, refer to Patent Literature 1).

[0003] In Patent Literature 1, a prism module having a first base, a prism, and a first shake correction device is described. The first shake correction device has a pair of swing support springs, a retainer, and a first actuator. The retainer holds the prism. The pair of swing support springs supports the retainer so as to be swingable with respect to the first base. The first actuator causes the retainer to swing with the first axis as the center.

[0004] Patent Literature 1: International Publication No. WO2019 / 156004

[0005] However, in the prism module of Patent Literature 1, the retainer is supported to the first base via the swing support springs. Therefore, when a vibration or an impact is applied to the prism module, the retainer vibrates with respect to the first base. In other words, the retainer is periodically misaligned with respect to the first base. Therefore, it is difficult to stably support the retainer, and thus it is difficult to improve the correction accuracy. SUMMARY

[0006] The present application has been achieved in view of the above-described problems, and an object thereof is to provide an optical unit capable of improving correction accuracy.

[0007] An exemplary optical unit of the present application has a movable body, a support body, a swing mechanism, and a magnetic member. The movable body has an optical element that reflects light traveling in a first direction to one side in a second direction intersecting the first direction. The support body supports the movable body so that the movable body is swingable with a swing axis as the center. The swing mechanism causes the movable body to swing with the swing axis as the center. The magnetic member is disposed to the support body. The swing mechanism has a magnet and a coil. The magnet is disposed to an end portion in a direction intersecting the first direction in the movable body. The coil opposes the magnet. The magnetic member is disposed on one side in the first direction with respect to the magnet.

[0008] Another exemplary optical unit of the present invention includes a movable body, a support body, a swing mechanism, and a preload section. The movable body has an optical element that reflects light traveling in a first direction toward a second direction intersecting the first direction. The support body supports the movable body so that it can swing about a swing axis extending along the first direction. The swing mechanism causes the movable body to swing about the swing axis. The preload section applies a preload to the movable body and the support body along the axial direction of the swing axis. The swing mechanism has a swing magnet and a coil opposite to the swing magnet. The preload section has a preload magnet and a magnetic component. The preload magnet is disposed on one of the movable body and the support body. The magnetic component is disposed on the other of the movable body and the support body. The preload magnet and the magnetic component are disposed on the swing axis.

[0009] According to the exemplary invention, it is possible to provide an optical unit that can improve correction accuracy. Attached Figure Description

[0010] Figure 1 This is a perspective view schematically showing a smartphone having an optical unit according to an embodiment of the present invention.

[0011] Figure 2 This is a perspective view showing the optical unit of this embodiment.

[0012] Figure 3 This is an exploded perspective view showing the optical unit of this embodiment decomposed into a movable body and a support body.

[0013] Figure 4 This is an exploded perspective view of the movable body of the optical unit in this embodiment.

[0014] Figure 5A It is along Figure 2 A cross-sectional view of the VA-VA line.

[0015] Figure 5B It is along Figure 2 A sectional view of the VB-VB line.

[0016] Figure 5C It is along Figure 2 A cross-sectional view of the VC-VC line.

[0017] Figure 6 This is an exploded perspective view of the optical elements and the cage of the optical unit in this embodiment.

[0018] Figure 7 This is an exploded perspective view of the first preload section, the first support section, and the second magnet of the optical unit in this embodiment.

[0019] Figure 8is a cross-sectional view of a first pre-press portion of the optical unit of the embodiment.

[0020] Figure 9 is a perspective view of a movable body of the optical unit of the embodiment.

[0021] Figure 10 is a view of a first support portion of the optical unit of the embodiment from one side Xl of the first direction X.

[0022] Figure 11 is an exploded perspective view of a support body of the optical unit of the embodiment.

[0023] Figure 12 is a perspective view of a second support portion of the optical unit of the embodiment.

[0024] Figure 13 is a view of the second support portion of the optical unit of the embodiment from the other side X2 of the first direction X.

[0025] Figure 14 is a view of the second support portion of the optical unit of the embodiment, an axis center protrusion, and a second magnet from the other side X2 of the first direction X.

[0026] Figure 15 is a cross-sectional view of a configuration of the optical unit of the first modification of the embodiment.

[0027] Figure 16 is a perspective view of a movable body of the optical unit of the first modification of the embodiment.

[0028] Figure 17 is a perspective view of a second support portion of the optical unit of the first modification of the embodiment.

[0029] Figure 18 is a cross-sectional view of a configuration of a first pre-press portion of the optical unit of the second modification of the embodiment.

[0030] Figure 19 is a cross-sectional view of the optical unit of the third modification of the embodiment.

[0031] Figure 20 is a perspective view of a movable body of the optical unit of the fourth modification of the embodiment.

[0032] Figure 21 is a perspective view of a support body of the optical unit of the fourth modification of the embodiment.

[0033] Figure 22 is a perspective view of a movable body of the optical unit of the fifth modification of the embodiment.

[0034] Figure 23 Fig. 6 is a view showing a second support portion, an axis center protrusion, a second magnet, and a third magnet of the optical unit of the sixth modification example of the present embodiment, as viewed from the other side X2 of the first direction X.

[0035] Figure 24 Fig. 7 is a view showing a second support portion, an axis center protrusion, and a third magnet of the optical unit of the seventh modification example of the present embodiment, as viewed from the other side X2 of the first direction X.

[0036] Figure 25 Fig. 8 is a sectional view showing the optical unit of the eighth modification example of the present embodiment.

[0037] Explanation of Reference Numerals

[0038] 1: optical unit; 2: movable body; 3: support body; 10: optical element; 30a: end portion; 61a: opposing surface; 61d: receiving recess; 61e: expansion portion; 62a: receiving hole (portion of the support body opposing the swing magnet); 73-74: magnetic member; 120: second swing mechanism (swing mechanism); 121: second magnet (magnet, swing magnet); 121c: coil opposing surface; 125: second coil (coil); 140: second pre-pressing portion (pre-pressing portion); 141: magnetic member; 142: third magnet (pre-pressing magnet); A2: second swing axis (swing axis); B1: swing direction; L: light. DETAILED DESCRIPTION

[0039] Hereinafter, exemplary embodiments of the present application will be described with reference to the drawings. In the drawings, like or equivalent parts are designated by like reference numerals, and repeated description will not be made.

[0040] In the present specification, the first direction X, the second direction Y, and the third direction Z that intersect with each other are appropriately described for easy understanding. In the present specification, the first direction X, the second direction Y, and the third direction Z are orthogonal to each other, but can not be orthogonal. In addition, one side of the first direction is described as one side XI 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 Yl 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 Zl 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, sometimes the first direction X is described as the up-down direction. The one side XI of the first direction X indicates the lower direction, and the other side X2 of the first direction X indicates the upper direction. However, the up-down direction, the upper direction, and the lower direction are defined for convenience of explanation, and do not need to coincide with the vertical direction. In addition, the up-down direction is defined only for convenience of explanation, and does not limit the orientation of the optical unit at the time of use and at the time of assembly.

[0041] First, referring to Figure 1 An example of the use of the optical unit 1 will be described. Figure 1 is a perspective view schematically showing a smartphone 200 having the optical unit 1 of the embodiment of the present application. The optical unit 1 reflects incident light toward a specific direction. As Figure 1 indicated, the optical unit 1 is suitably used as an optical member of the smartphone 200, for example. In addition, the use of the optical unit 1 is not limited to the smartphone 200, and can be used for various devices such as a digital camera and a video camera.

[0042] The smartphone 200 has a lens 202 through which light enters. In the smartphone 200, the optical unit 1 is disposed at a position inward of the lens 202. When light L enters the inside of the smartphone 200 via the lens 202, the traveling direction of the light L is changed by the optical unit 1. Then, the light L is imaged by an imaging element (not shown) via a lens (not shown).

[0043] Next, referring to Figures 2 to 14 The optical unit 1 will be described. Figure 2 is a perspective view showing the optical unit 1 of the embodiment. Figure 3 is an exploded perspective view in which the optical unit 1 of the embodiment is divided into the movable body 2 and the support body 3. As Figure 2 and Figure 3As shown, the optical unit 1 has at least the movable body 2, the support body 3, the second swing mechanism 120, and the magnetic member 73. In the present embodiment, the optical unit 1 also has the first swing mechanism 110, the first pre-pressing portion 40, and the FPC (Flexible Printed Circuit) 80. Hereinafter, these will be described in detail. Note that the second swing mechanism 120 is an example of the "swing mechanism" of the present application. Note also that the magnetic member 73 is an example of the "magnetic member" of the present application.

[0044] Figure 4 is an exploded perspective view of the movable body 2 of the optical unit 1 of the present embodiment. As shown, the optical unit 1 has the movable body 2 and the support body 3. The support body 3 supports the movable body 2 so that the movable body 2 can swing about a second swing axis A2. Note that the second swing axis A2 is an example of the "swing axis" of the present application. Figures 2 to 4

[0045] The movable body 2 has the optical element 10, the holder 20, the first support portion 30, and the first pre-pressing 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 that the holder 20 and the optical element 10 can swing about a first swing axis Al. Note that the first support portion 30 is supported by the second support portion 60 of the support body 3 so as to be able to swing about the second swing axis A2.

[0046] That is, the holder 20 can swing with respect to the first support portion 30, and the first support portion 30 can swing with respect to the second support portion 60. Therefore, the optical element 10 can be caused to swing about the first swing axis Al and the second swing axis A2, respectively, and thus the posture of the optical element 10 can be corrected about the first swing axis Al and the second swing axis A2, respectively. Therefore, the image shake can be suppressed regardless of the direction of the hand shake. As a result, the correction accuracy can be improved compared to a case in which the optical element 10 is caused to swing about only one swing axis. Note that the first swing axis Al is also referred to as a pitch axis. The second swing axis A2 is also referred to as a roll axis.

[0047] The first swing axis Al is an axis extending in the third direction Z. Note that the second swing axis A2 is an axis extending in the first direction X. Therefore, the optical element 10 can be caused to swing about the first swing axis Al that intersects the first direction X and the second direction Y. Note also that the optical element 10 can be caused to swing about the second swing axis A2 that extends in the first direction X. Therefore, the posture of the optical element 10 can be corrected appropriately. Note that the first direction X and the second direction Y are directions along the traveling direction of the light L. ​

[0048] In addition, the first support portion 30 supports the retainer 20 in the third direction Z. Thus, the first support portion 30 can be easily swung about a first swing axis Al extending in the third direction Z. Specifically, in the present embodiment, the first support portion 30 supports the retainer 20 in the third direction Z via the first pre-press portion 40.

[0049] Figure 5A is a cross-sectional view along the VA-VA line of Figure 2 Figure 5B is a cross-sectional view along the VB-VB line of Figure 2 Figure 5C is a cross-sectional view along the VC-VC line of Figure 2 Figure 6 is an exploded perspective view of the optical element 10 and the retainer 20 of the optical unit 1 of the present embodiment. As shown in Figs. 1 and 2, the optical element 10 is composed of a prism. The prism is formed of a transparent material having a higher refractive index than air. The optical element 10 has a substantially triangular prism shape. Specifically, the optical element 10 has a light incident surface 11, a light exit surface 12, a reflection surface 13, and a pair of side surfaces 14. Light L is incident to 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 perpendicularly to the light incident surface 11. The reflection surface 13 is connected to the light incident surface 11 and the light exit surface 12. The reflection surface 13 is inclined at about 45 degrees with respect to the light incident surface 11 and the light exit surface 12, respectively. The reflection surface 13 reflects light L, which is incident from the light incident surface 11 and travels toward one side XI of the first direction X, toward one side Yl of the second direction Y intersecting the first direction X. That is, the optical element 10 reflects light L, which travels toward one side XI of the first direction X, toward one side Yl of the second direction Y intersecting the first direction X. The pair of side surfaces 14 is connected to the light incident surface 11, the light exit surface 12, and the reflection surface 13. Figures 5A to 5C Figure 6 The retainer 20 is composed of, for example, resin. The retainer 20 has a retainer main body 21 and a pair of side surface portions 22. In addition, the retainer 20 has a pair of opposing side surfaces 22a, a groove 22b, and an on-axis recess 22c.

[0050] The retainer 20 is composed of, for example, resin. The retainer 20 has a retainer main body 21 and a pair of side surface portions 22. In addition, the retainer 20 has a pair of opposing side surfaces 22a, a groove 22b, and an on-axis recess 22c.

[0051] ​​​​Specifically, the retainer main body 21 has an opposing surface 21a and at least three support protrusions 21d. In the present embodiment, the retainer main body 21 has three support protrusions 21d. The opposing surface 21a opposes the optical element 10. The opposing surface 21a is inclined by about 45 degrees with respect to the incident direction of the light L. The incident direction of the light L is a direction toward the side X1 of the first direction X. The support protrusions 21d are disposed at the opposing surface 21a. The support protrusions 21d protrude from the opposing surface 21a toward the optical element 10. The support protrusions 21d contact the reflecting surface 13 of the optical element 10 to support the optical element 10. Thus, the optical element 10 is supported by the retainer 20 using the three support protrusions 21d. Therefore, compared to a case where the optical element 10 is supported by four or more points, the optical element 10 can be stably supported by the retainer 20.

[0052] In addition, the retainer main body 21 has a back surface 21b and a lower surface 21c. The back surface 21b is connected to an end portion of the opposing surface 21a on the side opposite to the emission direction of the light L. In addition, the "emission direction of the light L" is the side Y1 of the second direction Y. In addition, the "end portion on the side opposite to the emission direction of the light L" is an end portion of the other side Y2 of the second direction Y. The lower surface 21c is connected to the opposing surface 21a and the back surface 21b.

[0053] A pair of side surface portions 22 are disposed at both ends of the retainer main body 21 in the third direction Z. The pair of side surface portions 22 have shapes symmetrical to each other in the third direction Z. A pair of opposing side surfaces 22a are respectively disposed at the pair of side surface portions 22. The pair of opposing side surfaces 22a respectively oppose the pair of side surface portions 41 of the first pre-pressing portion 40. The detailed configuration of the side surface portion 41 will be described later. A groove 22b is disposed at the opposing side surface 22a. The groove 22b is recessed toward the inside of the retainer 20. The groove 22b extends toward the other side Y2 of the second direction Y. An on-axis recessed portion 22c is disposed inside the groove 22b. The on-axis recessed portion 22c is recessed toward the inside of the retainer 20 in the first swing axis line A1. The on-axis recessed portion 22c accommodates at least a part of the on-axis protrusion 41a of the first pre-pressing portion 40. The detailed configuration of the on-axis protrusion 41a will be described later. The on-axis recessed portion 22c has at least a part of a concave spherical surface.

[0054] The first pre-pressing portion 40 is disposed at least one of the retainer 20 and the first support portion 30. The first pre-pressing portion 40 applies a pre-pressing to the other at least one of the retainer 20 and the first support portion 30 in the axial direction of the first swing axis line A1. Thus, it is possible to suppress the misalignment of the retainer 20 in the axial direction of the first swing axis line A1. The axial direction of the first swing axis line A1 is a direction along the third direction. In addition, in the present specification and claims, the "application of a pre-pressing" means the application of a load in advance.

[0055] Figure 7is an exploded perspective view of the first pre-pressing portion 40, the first supporting portion 30, and the second magnet 121 of the optical unit 1 of the present embodiment. In the present embodiment, as shown in Figure 5C and Figure 7 the first pre-pressing portion 40 is configured of one member. The first pre-pressing portion 40 is disposed to the first supporting portion 30. The first pre-pressing portion 40 has a pair of side portions 41 and a connecting portion 42 connecting the pair of side portions 41 to each other. The pair of side portions 41 has a shape symmetrical to each other in the third direction Z. The pair of side portions 41 holds the holder 20 in the axial direction of the first swing axis Al. Thus, it is possible to apply a pre-press to the holder 20 in the axial direction of the first swing axis Al with a simple structure.

[0056] The side portion 41 has an on-axis protrusion 41a. The on-axis protrusion 41a protrudes toward the holder 20 in the first swing axis Al. The on-axis protrusion 41a has at least a portion of a spherical surface. A portion of the on-axis protrusion 41a is housed in the on-axis recess 22c. Thus, since the on-axis protrusion 41a is in point contact with the on-axis recess 22c, it is possible to stably support the holder 20 by the first pre-pressing portion 40. In addition, the pair of on-axis protrusions 41a of the first pre-pressing portion 40 holds the pair of on-axis recesses 22c of the holder 20 in the third direction Z. The holder 20 is supported by the first pre-pressing portion 40 at two points of contact with the on-axis protrusions 41a. Thus, the holder 20 can swing with the first swing axis Al as a center through the two points of contact.

[0057] Figure 8 is a cross-sectional view of the first pre-pressing portion 40 of the optical unit 1 of the present embodiment. As shown in Figure 8 , in a state where the first pre-pressing portion 40 is not installed to the holder 20, the pair of side portions 41 is inclined inward with respect to a direction V perpendicular to the connecting portion 42. Also, the distance between the pair of side portions 41 becomes smaller as it is farther from the connecting portion 42. Thus, compared to a case where the distance between the pair of side portions 41 becomes larger as it is farther from the connecting portion 42 and a case where the distance is the same, it is possible to apply a larger pre-press to the holder 20 in the axial direction of the first swing axis Al. In addition, in a state where the first pre-pressing portion 40 is not installed to the holder 20, the distance W41a between the pair of on-axis protrusions 41a is smaller than the distance W22c between the pair of on-axis recesses 22c of the holder 20 (refer to Figure 5C ).

[0058] The pair of side portions 41 and the connecting portion 42 are configured of one member. By expanding the pair of side portions 41 outward, it is possible to install the first pre-pressing portion 40 to the holder 20. That is, by expanding the pair of side portions 41 to one side Zl and the other side Z2 of the third direction Z, it is possible to install the first pre-pressing portion 40 to the holder 20. In the present embodiment, since the holder 20 has the groove 22b (refer toFigure 6 ), so the first pre-press portion 40 can be easily mounted to the holder 20 by moving the shaft protrusion 41a along the groove 22b. The first pre-press portion 40 is preferably formed of metal. The first pre-press portion 40 can also be formed of resin.

[0059] As shown in Figure 7 , the connecting portion 42 has an engagement hole 42a that engages with the engagement protrusion 31d of the first support portion 30. The engagement hole 42a is disposed at a central portion of the connecting portion 42 in the third direction Z. In the present embodiment, the engagement hole 42a is provided in order to fix the first pre-press portion 40 to the first support portion 30.

[0060] Figure 9 is a perspective view showing the movable body 2 of the optical unit 1 of the present embodiment. Figure 10 is a view showing the first support portion 30 of the optical unit 1 of the present embodiment from the side X1 of the first direction X. Figure 11 is an exploded perspective view of the support body 3 of the optical unit 1 of the present embodiment. Figure 12 is a perspective view showing the second support portion 60 of the optical unit 1 of the present embodiment. As shown in Figures 9 to 12 , one of the first support portion 30 and the second support portion 60 has at least three shaft center protrusions 71 that protrude toward the other of the first support portion 30 and the second support portion 60. In the present embodiment, the number of the shaft center protrusions 71 is three. Therefore, since the movable body 2 is supported by the three shaft center protrusions 71, the movable body 2 can be stably supported compared to a case where the movable body 2 is supported by four or more shaft center protrusions 71.

[0061] The other of the first support portion 30 and the second support portion 60 has a shaft center recess 31f that is recessed in a direction opposite to the shaft center protrusions 71. The shaft center recess 31f is in contact with the shaft center protrusions 71. In addition, the shaft center recess 31f constitutes at least a portion of a circle having the second swing axis A2 as a center. Therefore, the at least three shaft center protrusions 71 move along an inner surface 31g of the shaft center recess 31f. Thereby, the first support portion 30 can be stably swung with respect to the second support portion 60 with the second swing axis A2 as a center.

[0062] In the present embodiment, the first support portion 30 has the shaft center recess 31f, and the second support portion 60 has the shaft center protrusions 71. Therefore, in a case where the shaft center protrusions 71 are spherical bodies, the first support portion 30 can be assembled to the second support portion 60 in a state where the spherical bodies are disposed to the second support portion 60, so the assembly work can be made easy.

[0063] Specifically, as shown in Figure 7 and Figure 9As shown, the first support portion 30 has a support body 31 and a pair of side portions 32. The support body 31 has an upper opposing surface 31a, a recessed portion 31b, and a fitting protrusion 31d. The upper opposing surface 31a opposes the holder 20 in the first direction X. The recessed portion 31b is provided to the upper opposing surface 31a. The recessed portion 31b is slightly larger than the connecting portion 42 of the first pre-pressing portion 40. The recessed portion 31b accommodates the connecting portion 42. The recessed portion 31b has a bottom surface 31c. The fitting protrusion 31d is provided to the bottom surface 31c. The fitting protrusion 31d protrudes from the bottom surface 31c toward the holder 20. The connecting portion 42 of the first pre-pressing portion 40 is provided to the bottom surface 31c. The fitting protrusion 31d has a shape extending along the first swing axis Al. The fitting protrusion 31d has, for example, an elliptical shape or a rectangular shape. The fitting protrusion 31d is provided in the fitting hole 42a and is fitted to the fitting hole 42a. Thus, by fitting the fitting hole 42a of the connecting portion 42 to the fitting protrusion 31d of the first support portion 30, the first pre-pressing portion 40 can be fixed to the first support portion 30. In the present embodiment, the first support portion 30 has the fitting protrusion 31d, and the connecting portion 42 has the fitting hole 42a. However, the first support portion 30 can have the fitting hole, and the connecting portion 42 can have the fitting protrusion. In the present embodiment, the first support portion 30 and the first pre-pressing portion 40 are fixed by fitting. However, the first support portion 30 and the first pre-pressing portion 40 can be fixed by a method other than fitting. For example, the first support portion 30 and the first pre-pressing portion 40 can be fixed by an adhesive. Alternatively, the first support portion 30 and the first pre-pressing portion 40 can be integrally formed by insert molding or the like.

[0064] The pair of side portions 32 is provided to both ends of the support body 31 in the third direction Z. The pair of side portions 32 has a shape symmetrical to each other in the third direction Z. The side portion 32 has an inner side surface 32a and a recessed portion 32b. The inner side surface 32a opposes the holder 20 in the third direction Z. The recessed portion 32b is provided to the inner side surface 32a. The recessed portion 32b accommodates a part of the side portion 41 of the first pre-pressing portion 40.

[0065] In addition, the side portion 32 has an outer side surface 32c and an accommodation recessed portion 32d. The outer side surface 32c faces outward in the third direction Z. The accommodation recessed portion 32d is provided to the outer side surface 32c. The accommodation recessed portion 32d accommodates at least a part of the second magnet 121 of the second swing mechanism 120. In addition, the second magnet 121 is an example of the "magnet" of the present application.

[0066] Further, the support body 31 has a lower opposing surface 31e and an axis center recessed portion 31f. The lower opposing surface 31e opposes the second support portion 60 of the support body 3 in the first direction X. The axis center recessed portion 31f is provided to the lower opposing surface 31e. The axis center recessed portion 31f is provided to the one side XI of the first direction X with respect to the reflecting surface 13 of the optical element 10. Therefore, the axis center recessed portion 31f can be provided without blocking the optical path.

[0067] As described above, the axis center recessed portion 31f constitutes at least a part of a circle centered on the second swing axis A2. The axis center recessed portion 31f has a shape in which an end portion of the one side Yl of the second direction Y in the circle centered on the second swing axis A2 is cut out. Further, a part of the reflecting surface 13 protrudes toward the one side XI of the first direction X and the one side Yl of the second direction Y with respect to the lower opposing surface 31e. Therefore, the optical element 10 can be prevented from contacting the portion of the first support portion 30 in which the axis center recessed portion 31f is provided. That is, a space in which the optical element 10 is provided can be ensured. Further, in the present specification and claims, the "circle" includes a "circumference", and also includes an "inside surrounded by the circumference".

[0068] Further, as shown in Figure 9 and Figure 10 , it is preferable that the axis center recessed portion 31f constitute at least a part of the circumference of the circle centered on the second swing axis A2. That is, it is preferable that the inner surface 31g of the axis center recessed portion 31f have an inner side surface 31h on the radially inner side with respect to the second swing axis A2, a radially outer side inner side surface 31i, and a connecting surface 31j. The connecting surface 31j connects the inner side surface 31h and the inner side surface 31i. The inner surface 31g of the axis center recessed portion 31f contacts the axis center protruding portion 71. Therefore, the axis center protruding portion 71 can be held by the inner side surface 31i and the inner side surface 31h of the axis center recessed portion 31f. Therefore, the movable body 2 can be swung more stably with respect to the support body 3 compared to a case in which the axis center recessed portion 31f does not have the inner side surface 31h. Further, the axis center recessed portion 31f can not have the inner side surface 31h. In other words, the entire region surrounded by the inner side surface 31i can be recessed toward the other side X2 of the first direction X.

[0069] As shown in Figure 11 and Figure 12 , the support body 3 has the second support portion 60 and the axis center protruding portion 71. The magnetic member 73 is provided to the support body 3. The support body 3 preferably has an opposing surface 61a and a housing recessed portion 61d. Further, the housing recessed portion 61d is one example of the "housing recessed portion" of the present application.

[0070] Specifically, the second support portion 60 supports the first support portion 30 so that the first support portion 30 is able to swing about the second swing axis A2. In addition, the second support portion 60 supports the first support portion 30 in the first direction X. Thus, the first support portion 30 is able to easily swing about the second swing axis A2 extending in the first direction X.

[0071] The second support portion 60 has a support body 61, a pair of side portions 62, and a back portion 63. The support body 61 has an opposing surface 61a, at least three receiving recesses 61b, at least three circular protrusions 61c, and a plurality of receiving recesses 61d. In the present embodiment, the support body 61 has three receiving recesses 61b, three circular protrusions 61c, and two receiving recesses 61d.

[0072] The opposing surface 61a opposes the movable body 2 in the first direction X. Specifically, the opposing surface 61a opposes the lower opposing surface 31e of the first support portion 30 in the first direction X. The receiving recesses 61b, the circular protrusions 61c, and the receiving recesses 61d are disposed on the opposing surface 61a. The receiving recesses 61b and the receiving recesses 61d are recessed in the first direction X toward the opposite direction of the movable body 2. That is, the receiving recesses 61b and the receiving recesses 61d are recessed toward the first direction X side X1. The receiving recesses 61b oppose the shaft center protrusions 71f of the first support portion 30 in the first direction X. That is, the receiving recesses 61b are disposed on the same circumference C (refer to FIG. 6) about the second swing axis A2. The receiving recesses 61b receive a portion of the shaft center protrusions 71. Thus, the at least three shaft center protrusions 71 are disposed on the same circumference C about the second swing axis A2. Moreover, the shaft center protrusions 71 protrude in the axis direction of the second swing axis A2. Thus, the at least three shaft center protrusions 71 protruding in the axis direction of the second swing axis A2 contact the movable body 2. Thus, the movable body 2 is able to more stably swing with respect to the support body 3. In addition, the axis direction of the second swing axis A2 is the direction along the first direction X. Figure 13 ) on the same circumference C about the second swing axis A2. The receiving recesses 61b receive a portion of the shaft center protrusions 71. Thus, the at least three shaft center protrusions 71 are disposed on the same circumference C about the second swing axis A2. Moreover, the shaft center protrusions 71 protrude in the axis direction of the second swing axis A2. Thus, the at least three shaft center protrusions 71 protruding in the axis direction of the second swing axis A2 contact the movable body 2. Thus, the movable body 2 is able to more stably swing with respect to the support body 3. In addition, the axis direction of the second swing axis A2 is the direction along the first direction X.

[0073] In addition, one receiving recess 61b is disposed on the same circumference C at the position farthest from the optical element 10. On the other hand, two receiving recesses 61b are disposed at positions closer to the optical element 10 than the above-described one receiving recess 61b in a state of being arranged in the third direction Z.

[0074] The accommodation recess 61b holds a portion of the shaft center protrusion 71. The circular protrusion 61c protrudes toward the first support portion 30. Since the circular protrusion 61c protrudes from the opposing surface 61a, the depth of the accommodation recess 61b can be increased. Also, in the present embodiment, the lower half of the shaft center protrusion 71 is disposed within the accommodation recess 61b. The shaft center protrusion 71 has at least a portion of a spherical surface. Therefore, since the shaft center protrusion 71 is in point contact with the shaft center recess 31f, the movable body 2 can be smoothly moved with respect to the support body 3. In the present embodiment, the shaft center protrusion 71 is a spherical body. The shaft center protrusion 71 can rotate within the accommodation recess 61b. Therefore, the friction between the shaft center protrusion 71 and the shaft center recess 31f of the first support portion 30 becomes rolling friction, and thus the effect of rolling friction can also be obtained.

[0075] In addition, the material of the shaft center protrusion 71 is ceramic. Therefore, since the shaft center protrusion 71 is non-magnetic, it is not affected by a magnet. In addition, the shaft center protrusion 71 can be inhibited from being worn. In addition, the material of the shaft center protrusion 71 can also be metal. In this case, the shaft center protrusion 71 can also be inhibited from being worn. In addition, the entire shaft center protrusion 71 can be formed of metal, or for example, only the surface of the shaft center protrusion 71 can be formed of metal by plating treatment.

[0076] In addition, the at least three shaft center protrusions 71 are disposed apart from each other on the same circumference C centered on the second swing axis A2. Therefore, compared to a case in which the three shaft center protrusions 71 are not disposed apart, the movable body 2 can be supported over a larger range.

[0077] In addition, the at least three shaft center protrusions 71 are disposed at at least three prescribed positions on the same circumference C centered on the second swing axis A2, respectively. Therefore, the positions of the shaft center protrusions 71 do not move with respect to one of the movable body 2 and the support body 3. Therefore, the movable body 2 can be caused to swing more stably with respect to the support body 3. In the present embodiment, the positions of the shaft center protrusions 71 do not move with respect to the support body 3.

[0078] In addition, the two shaft center protrusions 71 are arranged in the third direction Z. The remaining shaft center protrusions 71 are disposed on circumferences C of which the two shaft center protrusions 71 are diameters at both ends. Therefore, the optical element 10 can be inhibited from contacting the shaft center protrusions 71. That is, a space in which the optical element 10 is disposed can be ensured.

[0079] In addition, a triangle having the above two shaft center protrusions 71 and the above remaining shaft center protrusion 71 as vertices is a right-angled triangle. The internal angle of the above remaining shaft center protrusion 71 is approximately 90 degrees.

[0080] Further, the shaft center protrusion 71 is disposed on one side X1 of the first direction X with respect to the reflecting surface 13 of the optical element 10. Therefore, the shaft center protrusion 71 can be disposed without blocking the optical path.

[0081] The housing recess 61d opposes the second magnet 121 of the second swing mechanism 120. The housing recess 61d houses the magnetic member 73. The housing recess 61d has a substantially rectangular shape. The magnetic member 73 has a rectangular shape. The housing recess 61d has an expansion portion 61e that expands toward a direction away from a corner of the magnetic member 73. Therefore, the corner of the magnetic member 73 can be inhibited from contacting an inner side surface of the housing recess 61d. Therefore, the corner of the magnetic member 73 can be inhibited from being damaged. Further, the expansion portion 61e is an example of the "expansion portion" of the present application.

[0082] The magnetic member 73 is a plate-shaped member composed of a magnetic body. The magnetic member 73 is disposed on one side X1 of the first direction X with respect to the second magnet 121. Since a force of mutual attraction (hereinafter, also referred to as an attractive force) acts on the second magnet 121 and the magnetic member 73, the movable body 2 can be inhibited from being misaligned in the first direction X with respect to the support body 3. Therefore, the movable body 2 can be stably supported, and thus the correction accuracy can be improved. Further, since the second magnet 121 of the second swing mechanism 120 is used, the number of components can be inhibited from increasing.

[0083] Figure 14 Fig. 2 is a view showing the second support portion 60, the shaft center protrusion 71, and the second magnet 121 of the optical unit 1 of the present embodiment, as viewed from the other side X2 of the first direction X. As shown in Fig. 2, the second magnet 121 is disposed on one side X1 of the first direction X with respect to the magnetic member 73. Further, the second magnet 121 is disposed on one side X1 of the first direction X with respect to the second coil 125. Therefore, the second magnet 121 can be disposed without blocking the optical path. Figure 5C and Figure 14 As shown in Fig. 2, the second magnet 121 overlaps the magnetic member 73 when viewed in a direction perpendicular to a direction in which the second magnet 121 and the second coil 125 oppose each other. Therefore, using magnetic flux that comes out of an end surface of the second magnet 121 in the second direction Y and enters the end surface of the second magnet 121 in the second direction Y by passing below the second magnet 121, the movable body 2 can be inhibited from being misaligned in the first direction X with respect to the support body 3. Further, the second coil 125 is an example of the "coil" of the present application. In the present embodiment, the second magnet 121 overlaps the magnetic member 73 when viewed in the first direction X. That is, the magnetic member 73 is disposed on one side X1 of the first direction X with respect to a surface 121f of the second magnet 121 on one side X1 of the first direction X among circumferential surfaces 121e of the second magnet 121. The surface 121f is a lower surface of the magnetic member 73. The detailed configuration of the second magnet 121 will be described later.

[0084] In this embodiment, two magnetic components 73 are disposed in each receiving recess 61d. In other words, the magnetic components 73 are arranged separately in the polarization direction of the second magnet 121 of the second swing mechanism 120. Therefore, compared to the case where the second magnet 121 is not separated, the area of ​​the second magnet 121 is smaller. Here, when the movable body 2 is swung by the second swing mechanism 120, the force acts on the movable body 2 in the direction of returning to the reference position by means of the attraction between the second magnet 121 and the magnetic components 73. Figure 5B As shown, the reference position is the position where the side portion 32 of the first support portion 30 is parallel to the side portion 62 of the second support portion 60. The force acting on the movable body 2 in the direction returning to the reference position decreases as the area of ​​the magnetic component 73 decreases. Therefore, when the movable body 2 is oscillated by the second oscillation mechanism 120, the magnetic force acting on the movable body 2 in the direction returning to the reference position can be reduced. Furthermore, as... Figure 7 As shown, the second magnet 121 is polarized in the second direction Y.

[0085] like Figure 12 and Figure 14 As shown, a pair of side portions 62 are disposed at both ends of the support body 61 in the third direction Z. The pair of side portions 62 have a shape that is symmetrical to each other in the third direction Z. The side portions 62 have a receiving hole 62a for accommodating the second coil 125 of the second swing mechanism 120. The receiving hole 62a penetrates the side portion 62 in the thickness direction. That is, the receiving hole 62a penetrates the side portion 62 in the third direction Z.

[0086] The back portion 63 is disposed at the end of the support body 61 on the other side Y2 in the second direction Y. The back portion 63 has a receiving hole 63a for arranging the first coil 115 of the first swing mechanism 110. The receiving hole 63a penetrates the back portion 63 in the thickness direction. That is, the receiving hole 63a penetrates the back portion 63 in the second direction Y.

[0087] The FPC 80 is configured to cover the outer sides of a pair of side portions 62 and the outer sides of the back portion 63. The FPC 80 includes, for example, semiconductor elements, connection terminals, and wiring. The FPC 80 provides power to the first coil 115 of the first oscillating mechanism 110 and the second coil 125 of the second oscillating mechanism 120 at predetermined times.

[0088] Specifically, such as Figure 11 As shown, the FPC 80 includes a substrate 81, connecting terminals 82, a reinforcing plate 83, and a magnetic component 84. The substrate 81 is made of, for example, a polyimide substrate. The substrate 81 is flexible. The substrate 81 has a plurality of pin insertion holes 81a. The pin insertion holes 81a are opposite to the first coil 115 and the second coil 125. A coil pin of the first coil 115 or a coil pin of the second coil 125 (not shown) is disposed in each pin insertion hole 81a.

[0089] The connection terminals 82 are provided on the substrate 81. The connection terminals 82 are opposed to the first swing mechanism 110 and the second swing mechanism 120. The connection terminals 82 are electrically connected to terminals of a Hall element, not shown. Further, four connection terminals 82 are provided for one Hall element, for example. Three reinforcing plates 83 are provided on the substrate 81. The reinforcing plates 83 are opposed to the first swing mechanism 110 and the second swing mechanism 120. The reinforcing plates 83 suppress flexure of the substrate 81.

[0090] Three magnetic members 84 are provided on the substrate 81. Two of the magnetic members 84 are opposed to the second magnet 121 of the second swing mechanism 120. In a state in which the second coil 125 is not energized, an attractive force is generated between the second magnet 121 and the magnetic members 84. Thus, the movable body 2 is disposed at a reference position in a rotational direction about the second swing axis A2. Further, the remaining one of the magnetic members 84 is opposed to the first magnet 111 of the first swing mechanism 110. In a state in which the first coil 115 is not energized, an attractive force is generated between the first magnet 111 and the magnetic member 84. Thus, the movable body 2 is disposed at a reference position in a rotational direction about the first swing axis Al. Further, the reference position will be described later.

[0091] As shown in FIG. 1, the first swing mechanism 110 swings the holder 20 about the first swing axis Al with respect to the first support portion 30. The first swing mechanism 110 has the first magnet 111 and the first coil 115. The first coil 115 is opposed to the first magnet 111 in the second direction Y. Figures 5A to 5C

[0092] The first magnet 111 is provided to one of the holder 20 and the second support portion 60. On the other hand, the first coil 115 is provided to the other of the holder 20 and the second support portion 60. In the present embodiment, the first magnet 111 is provided to the holder 20. The first coil 115 is provided to the second support portion 60. Thus, a force acts on the first magnet 111 due to a magnetic field generated when a current flows in the first coil 115. Further, the holder 20 swings with respect to the first support portion 30. Thus, the holder 20 can be swung by a simple structure using the first magnet 111 and the first coil 115. Further, by providing the first coil 115 to the second support portion 60, the first coil 115 does not swing with respect to the second support portion 60. Thus, wiring of the first coil 115 can be easily performed compared to a case in which the first coil 115 is provided to the first support portion 30, for example.

[0093] ​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 on the other side Y2 in the second direction Y in the holder 20. The first magnet 111 has an n-pole portion 111a composed of an n-pole and an s-pole portion 111b composed of an s-pole. The first magnet 111 is polarized in the first direction X.

[0094] The first coil 115 is disposed in the housing hole 63a of the back surface portion 63 of the second support portion 60. That is, the first coil 115 is disposed on the end portion 60a on the other side Y2 in the second direction Y in the second support portion 60. Therefore, the first coil 115 and the first magnet 111 can be disposed so as not to be on the optical path. Therefore, the optical path can be prevented from being blocked by the first coil 115 and the first magnet 111.

[0095] By energizing the first coil 115, a magnetic field is generated around the first coil 115. Also, a force caused by the magnetic field acts on the first magnet 111. As a result, the holder 20 and the optical element 10 are swung with the first swing axis Al as a center with respect to the first support portion 30 and the second support portion 60.

[0096] In addition, by disposing the first magnet 111 and the first coil 115 of the first swing mechanism 110 in the second direction Y, the first magnet 111 and the first coil 115 are attracted to each other in the second direction Y. Therefore, by the force with which the first magnet 111 and the first coil 115 are attracted to each other in the second direction Y, the holder 20 can be prevented from coming out to the side Yl in the second direction Y.

[0097] The second swing mechanism 120 causes the movable body 2 to swing with the second swing axis A2 as a center. Specifically, the second swing mechanism 120 causes the first support portion 30 to swing with the second swing axis A2 as a center with respect to the second support portion 60. The second swing mechanism 120 has a second magnet 121 and a second coil 125 opposed to the second magnet 121. The second magnet 121 is disposed on one of the first support portion 30 and the second support portion 60. On the other hand, the second coil 125 is disposed on the other of the first support portion 30 and the second support portion 60. In the present embodiment, the second magnet 121 is disposed on the first support portion 30. The second coil 125 is disposed on the second support portion 60. Therefore, by a magnetic field generated when a current flows in the second coil 125, the first support portion 30 is swung with respect to the second support portion 60. Therefore, the first support portion 30 can be swung with a simple structure using the second magnet 121 and the second coil 125. In addition, by disposing the second coil 125 on the second support portion 60, the second coil 125 is not swung with respect to the second support portion 60. Therefore, wiring of the second coil 125 can be easily performed compared to a case where the second coil 125 is disposed on, for example, the first support portion 30.

[0098] Specifically, the second magnet 121 is disposed in the receiving recess 32d (see Figure 7 ) of the side surface portion 32 of the first support portion 30. That is, the second magnet 121 is disposed at the end portion 30a in the direction intersecting the first direction X in the movable body 2. In the present embodiment, the second magnet 121 is disposed at the end portion 30a in the third direction Z in the movable body 2. Therefore, it is possible to suppress the movable body 2 from oscillating about the first oscillation axis Al extending in the third direction Z as a center due to the attractive force acting on the second magnet 121 and the magnetic member 73. The second magnet 121 has an n-pole portion 121a composed of n-poles and an s-pole portion 121b composed of s-poles. The second magnet 121 is polarized in the second direction Y intersecting the first direction X. Therefore, it is possible to make the movable body 2 oscillate about the second oscillation axis A2 in the direction of the incident direction of light as a center.

[0099] In addition, the second magnet 121 has a coil facing surface 121c, an inner side surface 121d, and a peripheral surface 121e. The coil facing surface 121c faces the second coil 125. The inner side surface 121d is disposed on the side opposite to the coil facing surface 121c. The peripheral surface 121e is connected to the coil facing surface 121c. The peripheral surface 121e is also connected to the inner side surface 121d. The peripheral surface 121e is disposed so as to extend around the entire periphery of the coil facing surface 121c and the inner side surface 121d.

[0100] The second coil 125 faces the second magnet 121 in the third direction Z. The second coil 125 is disposed in the receiving hole 62a (see Figure 12 ) of the side surface portion 62 of the second support portion 60. That is, the second coil 125 is disposed at the end portion 60b in the third direction Z in the second support portion 60.

[0101] By energizing the second coil 125, a magnetic field is generated around the second coil 125. Also, a force caused by the magnetic field acts on the second magnet 121. As a result, the first support portion 30, the retainer 20, and the optical element 10 oscillate about the second oscillation axis A2 relative to the second support portion 60.

[0102] In addition, as shown in Figure 1 , in a case where the optical unit 1 is used for the smartphone 200, a Hall element (not shown) inside the smartphone 200 detects the posture of the smartphone 200. Also, the first oscillation mechanism 110 and the second oscillation mechanism 120 are controlled in accordance with the posture of the smartphone 200. In addition, it is preferable that the posture of the retainer 20 relative to the second support portion 60 be detected. In this case, it is possible to control the posture of the retainer 20 relative to the second support portion 60 with high precision. In addition, as the sensor that detects the posture of the smartphone 200, for example, a gyro sensor can be used.

[0103] The following is for reference Figures 15 to 25 The first to eighth modifications of this embodiment will be described below. Hereinafter, the modifications will primarily focus on... Figures 1 to 14 The differences in this embodiment will be explained.

[0104] (First variation)

[0105] Reference Figures 15 to 17 A first variation of the embodiment of the present invention will be described. In the first variation, the optical unit 1 is described as having a preload portion that applies preload to the movable body 2 and the support body 3 along the axial direction of the swing axis.

[0106] like Figures 15 to 17 As shown, the optical unit 1 includes a movable body 2, a support body 3, a second swing mechanism 120, and a second preload section 140. The second preload section 140 is an example of a "preload section" according to the present invention. The second preload section 140 applies preload to the movable body 2 and the support body 3 along the axial direction of the second swing axis A2. Specifically, the second preload section 140 includes a magnetic component 141 made of a magnetic body and a third magnet 142. The magnetic component 141 is an example of a "magnetic component" according to the present invention. The third magnet 142 is an example of a "preload magnet" according to the present invention. Furthermore, in the first modification, the second magnet 121 of the second swing mechanism 120 is an example of a "swing magnet" according to the present invention. Additionally, the second coil 125 of the second swing mechanism 120 is an example of a "coil" according to the present invention.

[0107] A third magnet 142 is disposed on one of the movable body 2 and the support body 3. A magnetic component 141 is disposed on the other of the movable body 2 and the support body 3. Furthermore, the third magnet 142 and the magnetic component 141 are disposed on the second swing axis A2. Therefore, due to the mutual attractive force acting on the third magnet 142 and the magnetic component 141, a preload can be applied to the movable body 2 and the support body 3 along the axial direction of the second swing axis A2. Therefore, misalignment of the movable body 2 relative to the support body 3 in the axial direction of the second swing axis A2 can be suppressed. Moreover, by using the simple structure of the third magnet 142 and the magnetic component 141, a preload can be applied to the movable body 2 and the support body 3 along the axial direction of the second swing axis A2.

[0108] Furthermore, since the third magnet 142 and the magnetic component 141 are arranged on the second swing axis A2, when the movable body 2 swings around the second swing axis A2, changes in the positional relationship between the third magnet 142 and the magnetic component 141 in the second direction Y or the third direction Z can be suppressed. Therefore, changes in the attractive force between the third magnet 142 and the magnetic component 141 can be suppressed.

[0109] In the first modification, the third magnet 142 is disposed on one of the first support portion 30 and the second support portion 60. The magnetic component 141 is disposed on the other of the first support portion 30 and the second support portion 60. More specifically, the third magnet 142 is disposed on the second support portion 60. The magnetic component 141 is disposed on the first support portion 30.

[0110] Next, the magnetic component 141 and the third magnet 142 will be described in detail. For example... Figure 15 and Figure 16 As shown, the support body 31 has a receiving recess 31k. The receiving recess 31k is disposed on the lower opposing surface 31e. Furthermore, the receiving recess 31k is disposed on the second swing axis A2. The receiving recess 31k is recessed in the first direction X in the direction opposite to that of the support body 3. That is, the receiving recess 31k is recessed to the other side X2 of the first direction X. The receiving recess 31k houses the magnetic component 141.

[0111] like Figure 15 and Figure 17 As shown, the second support portion 60 has a receiving recess 61f. The receiving recess 61f is disposed on the opposing surface 61a. Furthermore, the receiving recess 61f is disposed on the second swing axis A2. The receiving recess 61f is recessed in the first direction X in the direction opposite to the movable body 2. That is, the receiving recess 61f is recessed to one side X1 in the first direction X. The receiving recess 61f receives the third magnet 142. Therefore, the third magnet 142 is opposite to the magnetic member 141 in the first direction X.

[0112] The receiving recess 61f is generally rectangular. The third magnet 142 is rectangular. The receiving recess 61f has four expansion portions 61g that extend away from the corners of the third magnet 142. Therefore, it is possible to prevent the corners of the third magnet 142 from contacting the inner surface of the receiving recess 61f. Therefore, it is possible to prevent corner damage to the third magnet 142.

[0113] In addition, in the first variation, with Figures 1 to 14 The embodiment shown is the same, with the second magnet 121 disposed at the end 30a of the movable body 2 in the direction intersecting the first direction X. Furthermore, the second coil 125 is disposed in the portion of the support body 3 opposite to the second magnet 121. Therefore, using the second swing mechanism 120, the movable body 2 can swing relative to the support body 3 about the second swing axis A2. Specifically, the second coil 125 is disposed in the storage hole 62a of the support body 3. The storage hole 62a is an example of the "portion in the support body opposite to the swing magnet" of the present invention.

[0114] Further, in the first modification example, the magnetic member 73 is disposed on the second swing axis A2 in a state of being disposed on the one side Xl of the first direction X with respect to the second magnet 121. However, the magnetic member 73 can not be disposed on the one side Xl of the first direction X with respect to the second magnet 121, and the magnetic member 141 and the third magnet 142 can be disposed on the second swing axis A2. In this case, the movable body 2 can be prevented from being misaligned in the axis direction of the second swing axis A2 with respect to the support body 3. Further, the positional relationship between the third magnet 142 and the magnetic member 141 can be prevented from changing in the second direction Y or the third direction Z.

[0115] (Second Modification Example)

[0116] Reference Figure 18 A second modification example of the embodiment of the present application will be described. In the second modification example, a case where the shaft protrusion 45 of the first pre-pressing portion 40 is composed of a ball will be described. As shown in FIG. 17, the pair of side surface portions 41 of the first pre-pressing portion 40 has the shaft protrusion 45. The shaft protrusion 45 protrudes toward the holder 20 on the first swing axis Al. The shaft protrusion 45 is composed of a ball. Figure 18

[0117] Further, the side surface portion 41 has a through-hole 41b. The through-hole 41b penetrates the side surface portion 41 in the thickness direction. That is, the through-hole 41b penetrates the side surface portion 41 in the third direction Z. The through-hole 41b is disposed on the first swing axis Al. The shaft protrusion 45 is fixed to the through-hole 41b. The shaft protrusion 45 can also be fitted to the through-hole 41b. Further, the shaft protrusion 45 can be fixed to the through-hole 41b using, for example, an adhesive. A part of the shaft protrusion 45 is housed in the shaft recess 22c. Also, the shaft protrusion 45 is in point contact with the shaft recess 22c.

[0118] (Third Modification Example)

[0119] Reference Figure 19 A third modification example of the embodiment of the present application will be described. In the third modification example, a case where the holder 20 has a shaft protrusion 22d will be described. Figure 19 is a cross-sectional view showing the optical unit 1 of the third modification example of the present embodiment. As shown in FIG. 18, the pair of side surface portions 22 of the holder 20 has the shaft protrusion 22d. The shaft protrusion 22d protrudes toward the first pre-pressing portion 40 on the first swing axis Al. The shaft protrusion 22d has a part of a spherical surface. The shaft protrusion 22d has, for example, a semispherical shape. Figure 19

[0120] ​​The first preload portion 40 has a pair of side portions 41 with an on-shaft recess 41c. The on-shaft recess 41c is recessed toward the side opposite to the holder 20. The on-shaft recess 41c is disposed on the first swing axis A1. The on-shaft recess 41c has a portion of a concave spherical surface. A portion of the on-shaft protrusion 22d is housed in the on-shaft recess 41c. Moreover, the on-shaft protrusion 22d is in point contact with the on-shaft recess 41c.

[0121] In addition, Figures 1 to 14 In the illustrated embodiment, an example is shown where the central convex portion 71 is a sphere and is disposed within the receiving recess 61b; however, the present invention is not limited to this example. That is, as shown... Figure 19 As shown, the central convex portion 61i can also be constructed from the same component as the component constituting the support body 3. More specifically, the central convex portion 61i and the second support portion 60 can also be constructed from a single component. Furthermore, the central convex portion can also be constructed from the same component as the component constituting the movable body 2. The central convex portion 61i can, for example, have a hemispherical shape. Additionally, the central convex portion 61i can also have, for example, a cylindrical front end formed into a hemispherical shape.

[0122] (4th variation)

[0123] Reference Figure 20 and Figure 21 A fourth variation of the embodiment of the present invention will be described. In this fourth variation, the movable body 2 has a central axial protrusion 71 and the support body 3 has a central axial recess 61j. Figure 20 This is a perspective view showing the movable body 2 of the optical unit 1 in the fourth variation of this embodiment. Figure 21 This is a perspective view showing the support 3 of the optical unit 1 in the fourth variation of this embodiment.

[0124] like Figure 20 As shown, the first support portion 30 has at least three axial center protrusions 71 protruding toward the second support portion 60. Specifically, the support body 31 of the first support portion 30 has at least three receiving recesses 31m and at least three circular protrusions 31n. In the fourth variation, the number of each of the axial center protrusions 71, the receiving recesses 31m, and the circular protrusions 31n is three. The receiving recesses 31m and the circular protrusions 31n are disposed on the lower opposing surface 31e. The receiving recesses 31m are disposed on the same circumference centered on the second swing axis A2. The receiving recesses 31m receive a portion of the axial center protrusions 71. Therefore, the axial center protrusions 71 are disposed on the same circumference centered on the second swing axis A2. Moreover, the axial center protrusions 71 protrude along the axial direction of the second swing axis A2.

[0125] like Figure 21As shown, the second support portion 60 has a central recess 61j. The central recess 61j is recessed in the direction opposite to the central protrusion 71. Specifically, the support body 61 of the second support portion 60 has a central recess 61j. The central recess 61j is disposed on the opposing surface 61a. The central recess 61j forms at least a portion of a circle centered on the second swing axis A2.

[0126] In the fourth variation, the central convex portion 71 moves along the inner surface of the central recess portion 61j. Therefore, with... Figures 1 to 14 The embodiment shown is the same, which enables the first support portion 30 to swing stably relative to the second support portion 60 with the second swing axis A2 as the center.

[0127] In addition, Figures 1 to 14 The illustrated embodiment shows an example where the magnetic component 73 is disposed within the receiving recess 61d, but the invention is not limited to this example. That is, as shown... Figure 21 As shown, the second support portion 60 may also not have a receiving recess 61d. In this case, the magnetic component 73 may also be disposed on the opposing surface 61a of the second support portion 60.

[0128] (5th variation)

[0129] Reference Figure 22 A fifth variation of the embodiments of the present invention will be described. Figure 22 This is a perspective view showing the movable body 2 of the optical unit 1 in the fifth variation of this embodiment. Figure 22 As shown, in the fifth modification, unlike the first modification, the support body 31 of the first support portion 30 does not have a receiving recess 31k (see reference). Figure 16 Furthermore, the magnetic component 141 of the second preload section 140 is disposed on the lower opposing surface 31e of the support body 31.

[0130] (Sixth variation)

[0131] Reference Figure 23 A sixth variation of the embodiment of the present invention will be described. In the sixth variation, the case where the magnetic member 74 extends along the swing direction of the second magnet 121 will be described. Figure 23 The diagram shows the second support portion 60, the central axial protrusion 71, the second magnet 121, and the third magnet 142 of the optical unit 1 in the sixth variation of this embodiment, viewed from the other side X2 of the first direction X.

[0132] like Figure 23 As shown, with Figures 1 to 14The magnetic member 74 is different from the embodiment shown in that it is disposed only one with respect to the second magnet 121. The magnetic member 74 extends along the oscillation direction Bl of the second magnet 121. Therefore, it is possible to increase the attractive force acting between the second magnet 121 and the magnetic member 74.

[0133] (7th Modification)

[0134] Referring to Figure 24 A 7th modification of the embodiment of the present application will be described. In the 7th modification, a case where the magnetic member 75 has a circular arc shape centered on the second oscillation axis A2 will be described. Figure 24 is a view showing the second support portion 60, the shaft center protrusion 71, and the third magnet 142 of the optical unit 1 of the 7th modification of the present embodiment from the other side X2 of the first direction X. As shown in the drawing, the magnetic member 75 extends along the oscillation direction of the second magnet 121 as in the 6th modification. Also, the magnetic member 75 has a circular arc shape centered on the second oscillation axis A2. Therefore, when the movable body 2 is caused to oscillate centered on the second oscillation axis A2, it is possible to suppress a change in the area where the second magnet 121 and the magnetic member 75 overlap each other in the axis direction of the second oscillation axis A2. Therefore, it is possible to suppress a change in the force that mutually attracts between the second magnet 121 and the magnetic member 75. Figure 24 The housing recess 61k is different from the embodiment shown in that it has a circular arc shape centered on the second oscillation axis A2. That is, the magnetic member 75 and the housing recess 61k are curved along the direction B2.

[0135] Figures 1 to 14 (8th Modification)

[0136] Referring to A 8th modification of the embodiment of the present application will be described.

[0137] is a cross-sectional view showing the optical unit 1 of the 8th modification of the present embodiment. As shown in the drawing, the magnetic member 141 of the second pre-pressing portion 140 is disposed on the side of the retainer 20 in the first support portion 30. That is, the magnetic member 141 is disposed on the side of the other side X2 of the first direction X in the first support portion 30. Figure 25 Figure 25 Therefore, by the attractive force between the magnetic member 141 and the third magnet 142, the magnetic member 141 presses the first support portion 30 toward the second support portion 60. Therefore, it is not necessary to fix the magnetic member 141 to the first support portion 30 using, for example, an adhesive. Figure 25 Also, in the 8th modification, the magnetic member 141 is disposed on the side of the other side X2 of the first direction X in the first support portion 30. Therefore, it is possible to suppress a change in the attractive force between the magnetic member 141 and the third magnet 142.

[0138] In addition, in the 8th modification, the magnetic member 141 is disposed on the side of the other side X2 of the first direction X in the first support portion 30. Therefore, it is possible to suppress a change in the attractive force between the magnetic member 141 and the third magnet 142.

[0139] Figures 1 to 14 ​​In the illustrated embodiment, an example in which the optical element 10 is constituted by a prism is shown, but the present application is not limited to this example. For example, as the optical element 10, a reflection member (e.g., a mirror) in a thin plate shape can also be used.

[0140] Further, in the above-described embodiment, the first magnet 111 and the second magnet 121 are arranged in the first direction X, but the present application is not limited to this example. For example, the first magnet 111 and the second magnet 121 can be arranged in the second direction Y. Figures 1 to 14 In the illustrated embodiment, an example in which the first pre-pressing portion 40 is arranged at the first support portion 30 is shown, but the present application is not limited to this example. The first pre-pressing portion that applies pre-pressing in the axial direction of the first oscillation axis Al can be arranged at the holder 20.

[0141] Further, in the above-described embodiment, the first magnet 111 and the second magnet 121 are arranged in the first direction X, but the present application is not limited to this example. For example, the first magnet 111 and the second magnet 121 can be arranged in the second direction Y. Figures 1 to 14 In the illustrated embodiment, an example in which the magnetic member 73 is arranged on the one side XI of the first direction X with respect to the second magnet 121 is shown, but the present application is not limited to this example. The magnetic member 73 can be arranged on the one side XI of the first direction X with respect to the first magnet 111.

[0142] The above-described embodiments (including modifications) of the present application have been described with reference to the drawings. However, the present application is not limited to the above-described embodiments, and can be implemented in various ways without departing from the gist thereof. Further, various applications can be formed by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments. For example, several constituent elements can be deleted from all the constituent elements shown in the embodiments. For example, constituent elements in different embodiments can be appropriately combined. The drawings mainly show each constituent element schematically for the sake of convenience of understanding, and the thickness, length, number, interval, and the like of each constituent element shown in the drawings are sometimes different from the actual ones for the sake of convenience of making the drawings. Further, the material, shape, size, and the like of each constituent element shown in the above-described embodiments are only examples, and are not particularly limited, and various changes can be made within a range that does not substantially depart from the effects of the present application.

[0143] Industrial Applicability

[0144] The present application can be used, for example, for an optical unit. The present application can be used, for example, for an optical unit.

Claims

1. An optical unit, comprising: a movable body having an optical element that reflects light traveling in one side in a first direction toward one side in a second direction intersecting the first direction; a support body that supports the movable body so that the movable body can swing about a swing axis; a swing mechanism that causes the movable body to swing about the swing axis; and a magnetic member disposed on the support body, wherein the swing mechanism comprises: a magnet disposed on an end portion in a direction intersecting the first direction in the movable body; and a coil opposed to the magnet, wherein the magnetic member is disposed on one side in the first direction with respect to the magnet, wherein the magnet has a coil-opposed surface opposed to the coil, and wherein the magnet overlaps the magnetic member when viewed from the first direction perpendicular to a direction in which the magnet and the coil are opposed.

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

3. The optical unit according to claim 1 or 2, wherein the swing axis extends along the first direction, and the magnet is polarized in a direction intersecting the first direction.

4. The optical unit according to claim 3, wherein the magnetic member is disposed in a state separated in a direction in which the magnet is polarized.

5. The optical unit according to claim 1 or 2, wherein the swing axis extends along the first direction, and the magnetic member extends along a swing direction of the magnet.

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

7. The optical unit according to claim 1 or 2, wherein the support body comprises: an opposed surface opposed to the movable body in the first direction; and a receiving recess that receives the magnetic member, wherein the receiving recess is disposed on the opposed surface, wherein the magnetic member has a rectangular shape, and wherein the receiving recess has a flared portion that expands in a direction away from a corner portion of the magnetic member.

8. An optical unit, comprising: a movable body having an optical element that reflects light traveling in one side in a first direction toward one side in a second direction intersecting the first direction; a support body that supports the movable body so that the movable body can swing about a swing axis extending along the first direction; a swing mechanism that causes the movable body to swing about the swing axis; a first magnetic member disposed on the support body; and a pre-pressing portion that applies a pre-pressing force to the movable body and the support body in an axial direction of the swing axis, wherein the swing mechanism comprises a swing magnet and a coil opposed to the swing magnet, wherein the pre-pressing portion comprises: a pre-pressing magnet disposed on one of the movable body and the support body; and a second magnetic member disposed on the other of the movable body and the support body, wherein the pre-pressing magnet and the magnetic member are disposed on the swing axis, wherein the swing magnet has a coil-opposed surface opposed to the coil, and wherein the swing magnet overlaps the second magnetic member when viewed from the first direction perpendicular to a direction in which the swing magnet and the coil are opposed. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The swing magnet overlaps the first magnetic member when viewed in the first direction that is orthogonal to the direction in which the swing magnet and the coil face each other.

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

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