Optical unit

Abstract

An optical unit is provided. The optical unit has an optical element, a holder, a first support portion, a second support portion, a first swing mechanism, and a second swing mechanism. The holder holds the optical element. The first support portion supports the holder so that the holder is able to swing around a first swing axis. The second support portion supports the first support portion so that the first support portion is able to swing around a second swing axis. The second swing mechanism has a second magnet and a second coil. The second magnet is disposed at the first support portion. The second coil is disposed at the second support portion.

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 is sometimes generated 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 is shaken, thereby suppressing image blur (for example, refer to Patent Literature 1).

[0003] In Patent Literature 1, a prism device for an imaging module is described, the prism device having a prism, a prism seat provided with the prism, and a support shaft. The prism seat is rotatable about the one support shaft.

[0004] Patent Literature 1: Chinese Utility Model Registration No. 206002752

[0005] However, in the prism device of Patent Literature 1, since the posture of the prism is corrected about only one support shaft, it is difficult to suppress image blur according to the direction of hand shake. 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 suppressing image blur in more directions.

[0007] An exemplary optical unit of the present application has an optical element, a holding frame, a first support portion, a second support portion, a first swing mechanism, and a second swing mechanism. The optical element changes the traveling direction of light. The holding frame holds the optical element. The first support portion supports the holding frame so that the holding frame is swingable about a first swing axis. The second support portion supports the first support portion so that the first support portion is swingable about a second swing axis that intersects the first swing axis. The first swing mechanism causes the holding frame to swing about the first swing axis with respect to the first support portion. The second swing mechanism causes the first support portion to swing about the second swing axis with respect to the second support portion. The first swing mechanism has a first magnet and a first coil. The first magnet is disposed on the holding frame. The first coil is disposed on the second support portion. The second swing mechanism has a second magnet and a second coil. The second magnet is disposed on the first support portion. The second coil is disposed on the second support portion.

[0008] Another exemplary optical unit of the present application has an optical element, a holder, a first support portion, a second support portion, a first swing mechanism, and a second swing mechanism. The optical element changes a traveling direction of light. The holder holds the optical element. The first support portion supports the holder so that the holder can swing around a first swing axis. The second support portion supports the first support portion so that the first support portion can swing around a second swing axis that intersects the first swing axis. The first swing mechanism causes the holder to swing around the first swing axis with respect to the first support portion. The second swing mechanism causes the first support portion to swing around the second swing axis with respect to the second support portion.

[0009] According to the exemplary present application, an optical unit that can suppress image blur in more directions can be provided. BRIEF DESCRIPTION OF DRAWINGS

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

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

[0012] Figure 3 is an exploded perspective view of the optical unit of the present embodiment, which is divided into a movable body and a support body.

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

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

[0015] Figure 5B is a cross-sectional view along a VB-VB line of Figure 2 .

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

[0017] Figure 6 is an exploded perspective view of the optical element and the holder of the optical unit of the present embodiment.

[0018] Figure 7 is an exploded perspective view of the first pre-press portion, the first support portion, and the second magnet of the optical unit of the present embodiment.

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

[0020] Figure 9 Fig. 1 is a perspective view showing a movable body of an optical unit of the present embodiment.

[0021] Figure 10 Fig. 2 is a view showing a first support portion of the optical unit of the present embodiment from one side Xl of a first direction X.

[0022] Figure 11 Fig. 3 is an exploded perspective view of a support body of the optical unit of the present embodiment.

[0023] Figure 12 Fig. 4 is a perspective view showing a second support portion of the optical unit of the present embodiment.

[0024] Figure 13 Fig. 5 is a view showing the second support portion of the optical unit of the present embodiment from the other side X2 of the first direction X.

[0025] Figure 14 Fig. 6 is a view showing the second support portion, an axis center protrusion, a second magnet, and a third magnet of the optical unit of the present embodiment from the other side X2 of the first direction X.

[0026] Figure 15 Fig. 7 is a sectional view showing a configuration around a first pre-press portion of the optical unit of the present embodiment.

[0027] Figure 16 Fig. 8 is a sectional view showing the optical unit of the present embodiment.

[0028] Figure 17 Fig. 9 is a perspective view showing a movable body of the optical unit of the present embodiment.

[0029] Figure 18 Fig. 10 is a perspective view showing a support body of the optical unit of the present embodiment.

[0030] Figure 19 Fig. 11 is a perspective view showing a movable body of the optical unit of the present embodiment.

[0031] Figure 20 Fig. 12 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 present embodiment from the other side X2 of the first direction X.

[0032] Figure 21 Fig. 13 is a view showing a second support portion, an axis center protrusion, and a third magnet of the optical unit of the present embodiment from the other side X2 of the first direction X.

[0033] Figure 22 Fig. 14 is a sectional view showing the optical unit of the present embodiment.

[0034] Explanation of reference numerals

[0035] 1: optical unit; 10: optical element; 13: reflecting surface; 20: holder; 20a: end portion; 21a: opposing surface; 21d: supporting protrusion; 22a: opposing side surface; 22b: groove; 22c: axial concave portion; 22d: axial protrusion; 30: first supporting portion; 30a: end portion; 31d: fitting protrusion; 31f: axial center concave portion; 31g: inner surface; 40: first pre-pressing portion; 41: side surface portion; 41a: axial protrusion; 41c: axial concave portion; 42: connecting portion; 42a: fitting hole; 45: axial protrusion; 60: second supporting portion; 60a, 60b: end portion; 61i: axial center protrusion; 61j: axial center concave portion; 71: axial center protrusion; 110: first oscillation mechanism; 111: first magnet; 115: first coil; 120: second oscillation mechanism; 121: second magnet; 125: second coil; 140: second pre-pressing portion; 141: magnetic member; 142: third magnet; Al: first oscillation axis; A2: second oscillation axis; C: circumference; L: light. DETAILED DESCRIPTION

[0036] 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 description thereof will not be repeated.

[0037] In the present specification, a first direction X, a second direction Y, and a third direction Z which 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 a vertical direction. The one side XI of the first direction X indicates a lower direction, and the other side X2 of the first direction X indicates an upper direction. However, the vertical 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 vertical 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.

[0038] First, with reference to Figure 1 An example of the use of the optical unit 1 will be described. Figure 1is a perspective view schematically showing a smartphone 200 having an optical unit 1 of an embodiment of the present application. The optical unit 1 reflects incident light toward a specific direction. As shown in Figure 1 , 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 the optical unit 1 can be used for various devices such as a digital camera and a video camera.

[0039] The smartphone 200 has a lens 202 through which light is incident. In the smartphone 200, the optical unit 1 is disposed at a position inward of the lens 202. When light L is incident into 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).

[0040] Next, the optical unit 1 will be described with reference to Figures 2 to 14 . Figure 2 is a perspective view showing the optical unit 1 of the present embodiment. Figure 3 is an exploded perspective view in which the optical unit 1 of the present embodiment is divided into a movable body 2 and a support body 3. As shown in Figure 2 and Figure 3 , the optical unit 1 has at least an optical element 10, a retainer 20, a first support portion 30, a second support portion 60, a first swing mechanism 110, and a second swing mechanism 120. In the present embodiment, the optical unit 1 further has a first pre-press portion 40 and a second pre-press portion 140. In addition, in the present embodiment, the optical unit 1 further has an FPC (Flexible Printed Circuit) 80. These will be described in detail below.

[0041] Figure 4 is an exploded perspective view of the movable body 2 of the optical unit 1 of the present embodiment. As shown in Figures 2 to 4 , 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.

[0042] The movable body 2 has the optical element 10, the retainer 20, the first support portion 30, and the first pre-press portion 40. The optical element 10 changes the traveling direction of light. The retainer 20 holds the optical element 10. The first support portion 30 supports the retainer 20 and the optical element 10 so that the retainer 20 and the optical element 10 can swing about a first swing axis Al. In addition, 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.

[0043] That is, the holder 20 is able to swing with respect to the first support portion 30, and the first support portion 30 is able to swing with respect to the second support portion 60. Thus, the optical element 10 is able to swing with the first swing axis Al and the second swing axis A2 as centers, respectively, and thus the posture of the optical element 10 is able to be corrected with the first swing axis Al and the second swing axis A2 as centers, respectively. Thus, it is possible to suppress image blur in more directions. As a result, it is possible to improve correction accuracy compared to a case in which the optical element 10 is caused to swing with only one swing axis as a center. In addition, 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.

[0044] The first swing axis Al is an axis extending in the third direction Z. In addition, the second swing axis A2 is an axis extending in the first direction X. Thus, the optical element 10 is able to be caused to swing with the first swing axis Al intersecting the first direction X and the second direction Y as centers. In addition, the optical element 10 is able to be caused to swing with the second swing axis A2 extending in the first direction X as a center. Thus, the posture of the optical element 10 is able to be appropriately corrected. In addition, the first direction X and the second direction Y are directions along the direction of travel of the light L.

[0045] In addition, the first support portion 30 supports the holder 20 in the third direction Z. Thus, the first support portion 30 is able to be easily caused to swing with the first swing axis Al extending in the third direction Z as a center. Specifically, in the present embodiment, the first support portion 30 supports the holder 20 in the third direction Z via the first pre-pressure portion 40.

[0046] 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 holder 20 of the optical unit 1 of the present embodiment. As Figures 5A to 5C and Figure 6 ​​​As shown, 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. The 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 the light L, which is incident from the light incident surface 11 and travels toward one side X1 of the first direction X, toward one side Y1 of the second direction Y that intersects 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.

[0047] The holder 20 is composed of resin, for example. The holder 20 has a holder main body 21 and a pair of side surface portions 22. In addition, the holder 20 has a pair of opposing side surfaces 22a, a groove 22b, and an on-axis recess 22c.

[0048] Specifically, the holder main body 21 has an opposing surface 21a and at least three support protrusions 21d. In the present embodiment, the holder main body 21 has three support protrusions 21d. The opposing surface 21a opposes the optical element 10. The opposing surface 21a is inclined at about 45 degrees with respect to the incident direction of the light L. The incident direction of the light L is the direction toward one 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 reflection surface 13 of the optical element 10 to support the optical element 10. Thus, the optical element 10 is supported by the holder 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 holder 20.

[0049] In addition, the holder 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 the exit direction of the light L. In addition, the "exit direction of the light L" is one side Y1 of the second direction Y. In addition, the "end portion on the side opposite the exit direction of the light L" is an end portion on 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.

[0050] A pair of side portions 22 is provided at both ends of the holder main body 21 in the third direction Z. The pair of side portions 22 has a shape symmetrical with respect to each other in the third direction Z. A pair of opposing side surfaces 22a is provided in the pair of side portions 22, respectively. The pair of opposing side surfaces 22a opposes the pair of side portions 41 of the first pre-pressing portion 40, respectively. The detailed configuration of the side portion 41 will be described later. A groove 22b is provided in the opposing side surface 22a. The groove 22b is recessed toward the inside of the holder 20. The groove 22b extends to the other side Y2 in the second direction Y. An over-axle recessed portion 22c is provided inside the groove 22b. The over-axle recessed portion 22c is recessed toward the inside of the holder 20 in the first swinging axis line Al. The over-axle recessed portion 22c accommodates at least a part of the over-axle protruding portion 41a of the first pre-pressing portion 40. The detailed configuration of the over-axle protruding portion 41a will be described later. The over-axle recessed portion 22c has at least a part of a concave spherical surface.

[0051] The first pre-pressing portion 40 is provided to at least one of the holder 20 and the first support portion 30. The first pre-pressing portion 40 applies a pre-pressing to the other of the holder 20 and the first support portion 30 in the axial direction of the first swinging axis line Al. Therefore, it is possible to suppress the misalignment of the holder 20 in the axial direction of the first swinging axis line Al. The axial direction of the first swinging axis line Al is a direction along the third direction. In addition, in the present specification and claims, the so-called "application of a pre-pressing" means the application of a load in advance.

[0052] Figure 7 is an exploded perspective view of the first pre-pressing portion 40, the first support 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 by one member. The first pre-pressing portion 40 is provided to the first support 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 with respect to each other in the third direction Z. The pair of side portions 41 sandwiches the holder 20 in the axial direction of the first swinging axis line Al. Therefore, it is possible to apply a pre-pressing to the holder 20 in the axial direction of the first swinging axis line Al with a simple structure.

[0053] The side portions 41 have shaft protrusions 41a. The shaft protrusions 41a protrude toward the holder 20 in the first swing axis Al. The shaft protrusions 41a have at least a portion of a spherical surface. A portion of the shaft protrusions 41a is housed in the shaft recesses 22c. Therefore, since the shaft protrusions 41a are in point contact with the shaft recesses 22c, the holder 20 can be stably supported by the first pre-pressing portion 40. In addition, the pair of shaft protrusions 41a of the first pre-pressing portion 40 sandwich the pair of shaft 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 shaft protrusions 41a. Therefore, the holder 20 can swing with the first swing axis Al as a center through the two points of contact.

[0054] 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 attached to the holder 20, the pair of side portions 41 are 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. Therefore, compared to a case where the distance between the pair of side portions 41 is larger as it is farther from the connecting portion 42 and a case where the distance is the same, a greater pre-pressing force can be applied 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 attached to the holder 20, the distance W41a between the pair of shaft protrusions 41a is smaller than the distance W22c between the pair of shaft recesses 22c of the holder 20 (see Figure 5C ).

[0055] The pair of side portions 41 and the connecting portion 42 are formed of one member. By expanding the pair of side portions 41 outward, the first pre-pressing portion 40 can be attached 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, the first pre-pressing portion 40 can be attached to the holder 20. In the present embodiment, since the holder 20 has the groove 22b (see Figure 6 ), the first pre-pressing portion 40 can be easily attached to the holder 20 by moving the shaft protrusions 41a along the groove 22b. It is preferable that the first pre-pressing portion 40 be formed of metal. With the above structure, the first pre-pressing portion 40 easily functions as a leaf spring, and thus it is easy to apply a pre-pressing force. In addition, the first pre-pressing portion 40 can also be formed of resin.

[0056] As shown in Figure 7 , the connecting portion 42 has an insertion hole 42a that is inserted into the fitting protrusion 3 Id of the first support portion 30. The insertion hole 42a is disposed at a central portion of the connecting portion 42 in the third direction Z. In the present embodiment, the insertion hole 42a is provided in order to fix the first pre-pressing portion 40 to the first support portion 30.

[0057] 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 Xl 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 periphery of the second support portion 60 of the optical unit 1 of the present embodiment. As shown in the figure, one of the first support portion 30 and the second support portion 60 has at least three shaft center protrusions 71 protruding 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 the case where the movable body 2 is supported by four or more shaft center protrusions 71. Figures 9 to 12

[0058] The other of the first support portion 30 and the second support portion 60 has a shaft center recess 3 If recessed in a direction opposite to the shaft center protrusions 71. The shaft center recess 3 If is in contact with the shaft center protrusions 71. In addition, the shaft center recess 3 If constitutes at least a part 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 3 Ig of the shaft center recess 3 If. 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.

[0059] In the present embodiment, the first support portion 30 has the shaft center recess 3 If, and the second support portion 60 has the shaft center protrusions 71. Therefore, in the 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 arranged at the second support portion 60, and thus the assembly work can be made easy.

[0060] Specifically, as shown in Figure 7 and Figure 9 ​As 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 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 a fitting hole, and the connecting portion 42 can have a 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.

[0061] 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.

[0062] Further, 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.

[0063] 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 one side XI of the first direction X with respect to the reflecting surface 13 of the optical element 10. Thus, the axis center recessed portion 31f can be provided without blocking the optical path.

[0064] As described above, the shaft center recess 31f constitutes at least a part of a circle centered on the second swing axis A2. The shaft center recess 31f has a shape in which an end portion of one side Y1 of the second direction Y in the circle centered on the second swing axis A2 is cut out. Also, a part of the reflection surface 13 protrudes toward one side X1 of the first direction X and one side Y1 of the second direction Y with respect to the lower opposing surface 31e. Therefore, it is possible to suppress the optical element 10 from contacting the part of the first support portion 30 in which the shaft center recess 31f is disposed. That is, it is possible to secure a space in which the optical element 10 is disposed. Note that, in the present specification and claims, the "circle" includes a "circumference", and also includes an "inside surrounded by the circumference".

[0065] Also, as shown in Figure 9 and Figure 10 Preferably, the shaft center recess 31f constitutes at least a part of the circumference of the circle centered on the second swing axis A2. That is, preferably, the inner surface 31g of the shaft center recess 31f has an inner side surface 31h on a radially inner side with respect to the second swing axis A2, an inner side surface 31i on a radially outer side, and a connecting surface 31j. The connecting surface 31j connects the inner side surface 31h and the inner side surface 31i. The inner surface 31g of the shaft center recess 31f is in contact with the shaft center protrusion 71. Therefore, it is possible to hold the shaft center protrusion 71 by the inner side surface 31i and the inner side surface 31h of the shaft center recess 31f. Therefore, it is possible to swing the movable body 2 more stably with respect to the support body 3, as compared with a case in which the shaft center recess 31f does not have the inner side surface 31h. Note that, the shaft center recess 31f can also 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.

[0066] Also, the support main body 31 preferably has a housing recess 31k. The housing recess 31k houses the magnetic member 141 of the second pre-pressing portion 140.

[0067] As shown in Figure 11 and Figure 12 The support body 3 has the second support portion 60, the shaft center protrusion 71, and the magnetic member 73. The support body 3 preferably has the opposing surface 61a and the housing recess 61d.

[0068] Specifically, the second support portion 60 supports the first support portion 30 so that the first support portion 30 can swing centered on the second swing axis A2. Also, the second support portion 60 supports the first support portion 30 in the first direction X. Therefore, it is possible to easily swing the first support portion 30 centered on the second swing axis A2 extending along the first direction X.

[0069] 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, a plurality of receiving recesses 61d, and a receiving recess 61f. In the present embodiment, the support body 61 has three receiving recesses 61b, three circular protrusions 61c, and two receiving recesses 61d.

[0070] 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, the receiving recesses 61d, and the receiving recess 61f are disposed on the opposing surface 61a. The receiving recesses 61b, the receiving recesses 61d, and the receiving recess 61f are recessed in the first direction X in the direction opposite to the movable body 2. That is, the receiving recesses 61b, the receiving recesses 61d, and the receiving recess 61f are recessed toward one side X1 in the first direction X. The receiving recess 61b opposes the shaft center recess 31f of the first support portion 30 in the first direction X. That is, the receiving recess 61b is disposed on the same circumference C (refer to FIG. 6) centered on the second swing axis A2. The receiving recess 61b receives a portion of the shaft center protrusion 71. Therefore, at least three shaft center protrusions 71 are disposed on the same circumference C centered on the second swing axis A2. Moreover, the shaft center protrusion 71 protrudes in the axial direction of the second swing axis A2. Therefore, at least three shaft center protrusions 71 protruding in the axial direction of the second swing axis A2 are in contact with the movable body 2. Thus, the movable body 2 can be caused to swing more stably with respect to the support body 3. In addition, the axial direction of the second swing axis A2 is a direction along the first direction X. Figure 13

[0071] In addition, one receiving recess 61b is disposed at the position farthest from the optical element 10 on the same circumference. On the other hand, two receiving recesses 61b are disposed at positions closer to the optical element 10 than the above-mentioned one receiving recess 61b in a state of being arranged in the third direction Z.

[0072] The receiving 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, it is possible to increase the depth of the receiving recess 61b. Moreover, in the present embodiment, the lower half of the shaft center protrusion 71 is disposed in the receiving 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, it is possible to cause the movable body 2 to move smoothly 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 is rotatable in the receiving 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. ​

[0073] In addition, the shaft center protrusion 71 is made of ceramic. Therefore, since the shaft center protrusion 71 is non-magnetic, the shaft center protrusion 71 is not affected by the magnet. In addition, the shaft center protrusion 71 can be prevented from being worn. In addition, the shaft center protrusion 71 can be made of metal. In this case, the shaft center protrusion 71 can also be prevented from being worn. In addition, the entire shaft center protrusion 71 can be formed of metal, or only the surface of the shaft center protrusion 71 can be formed of metal by plating treatment, for example.

[0074] In addition, the at least three shaft center protrusions 71 are arranged apart from each other on the same circumference C centered on the second swing axis A2. Therefore, compared to a case where the three shaft center protrusions 71 are not arranged apart from each other, the movable body 2 can be supported in a larger range.

[0075] In addition, the at least three shaft center protrusions 71 are arranged at at least three predetermined 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.

[0076] In addition, the two shaft center protrusions 71 are arranged in the third direction Z. The remaining shaft center protrusions 71 are arranged on the circumferences C at both ends with the two shaft center protrusions 71 as diameters. Therefore, the optical element 10 can be prevented from coming into contact with the shaft center protrusions 71. That is, a space in which the optical element 10 is arranged can be ensured.

[0077] In addition, a triangle having the above two shaft center protrusions 71 and the above remaining shaft center protrusions 71 as vertices is a right-angled triangle. The internal angle of the above remaining shaft center protrusions 71 is approximately 90 degrees.

[0078] In addition, the shaft center protrusions 71 are arranged on one side XI of the first direction X with respect to the reflecting surface 13 of the optical element 10. Therefore, the shaft center protrusions 71 can be arranged without blocking the optical path.

[0079] The housing recess 61d faces 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 prevented from coming into contact with an inner side surface of the housing recess 61d. Therefore, the corner of the magnetic member 73 can be prevented from being damaged.

[0080] The magnetic member 73 is a plate-shaped member composed of a magnetic body. The magnetic member 73 is disposed on one side XI 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. In addition, since the second magnet 121 is used by the second swing mechanism 120, the number of components can be inhibited from increasing. In addition, as described later, the effect of inhibiting the movable body 2 from being misaligned in the first direction X with respect to the support body 3 is the same as the effect of the magnetic member 141 of the second pre-pressing portion 140 and the third magnet 142. Therefore, the magnetic member 141 of the second pre-pressing portion 140 and the third magnet 142 can also be miniaturized.

[0081] Figure 14 FIG. 2 is a view of the second support portion 60, the shaft center protrusion 71, the second magnet 121, and the third magnet 142 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 the other side X2 of the first direction X with respect to the magnetic member 73. In the present embodiment, the second magnet 121 is disposed on the other side X2 of the first direction X with respect to the magnetic member 73, as viewed in the first direction X. That is, the magnetic member 73 is disposed on the one side XI of the first direction X with respect to the face 121f of the one side XI of the first direction X in the peripheral surface 121e of the second magnet 121. The face 121f is the lower surface of the magnetic member 73. The detailed configuration of the second magnet 121 is described later. Figure 5C and Figure 14 As shown in FIG. 2, the second magnet 121 overlaps the magnetic member 73 when viewed in the direction perpendicular to the direction opposite the second magnet 121 and the second coil 125. 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 the one side XI of the first direction X with respect to the face 121f of the one side XI of the first direction X in the peripheral surface 121e of the second magnet 121. The face 121f is the lower surface of the magnetic member 73. The detailed configuration of the second magnet 121 is described later.

[0082] In the present embodiment, two magnetic members 73 are disposed in each of the accommodation recesses 61d. In other words, the magnetic members 73 are disposed separately in the polarization direction of the second magnet 121 of the second swing mechanism 120. Therefore, the area of the second magnet 121 is smaller than in the case where the second magnet 121 is not separated. In addition, as shown in FIG. 2, the second magnet 121 is polarized in the second direction Y. Here, when the movable body 2 is swung by the second swing mechanism 120, a force acts on the movable body 2 in the direction of returning to the reference position by the attractive force between the second magnet 121 and the magnetic member 73. As shown in FIG. 2, the reference position is a position at which the side surface portion 32 of the first support portion 30 is parallel to the side surface portion 62 of the second support portion 60. The force acting on the movable body 2 in the direction of returning to the reference position is smaller as the area of the magnetic member 73 is smaller. Therefore, when the movable body 2 is swung by the second swing mechanism 120, the magnetic force acting on the movable body 2 in the direction of returning to the reference position can be reduced. Figure 7 Figure 5B

[0083] ​​The housing recess 61f is provided on the second swing axis A2. The housing recess 61f houses the third magnet 142 of the second pre-pressing portion 140 of the first support portion 30. Therefore, the third magnet 142 opposes the magnetic member 141 of the second pre-pressing portion 140 in the first direction X. The housing recess 61f has a substantially rectangular shape. The third magnet 142 has a rectangular shape. The housing recess 61f has an expansion portion 61g. The expansion portion 61g expands in a direction away from a corner of the third magnet 142. Therefore, it is possible to suppress the corner of the third magnet 142 from contacting the inner side surface of the housing recess 61f. Therefore, it is possible to suppress the corner of the third magnet 142 from being damaged.

[0084] As shown in Figure 12 and Figure 14 , a pair of side surface portions 62 are provided at both ends of the support main body 61 in the third direction Z. The pair of side surface portions 62 have shapes symmetrical to each other in the third direction Z. The side surface portion 62 has a housing hole 62a in which the second coil 125 of the second swing mechanism 120 is disposed. The housing hole 62a penetrates the side surface portion 62 in the thickness direction. That is, the housing hole 62a penetrates the side surface portion 62 in the third direction Z.

[0085] The back surface portion 63 is provided at the end of the other side Y2 of the support main body 61 in the second direction Y. The back surface portion 63 has a housing hole 63a in which the first coil 115 of the first swing mechanism 110 is disposed. The housing hole 63a penetrates the back surface portion 63 in the thickness direction. That is, the housing hole 63a penetrates the back surface portion 63 in the second direction Y.

[0086] The FPC 80 is disposed so as to cover the outer sides of the pair of side surface portions 62 and the outer side of the back surface portion 63. The FPC 80 has, for example, a semiconductor element, a connection terminal, and a wiring. The FPC 80 supplies electric power to the first coil 115 of the first swing mechanism 110 and the second coil 125 of the second swing mechanism 120 at a prescribed timing.

[0087] Specifically, as shown in Figure 11 , the FPC 80 has a substrate 81, a connection terminal 82, a reinforcing plate 83, and a magnetic member 84. The substrate 81 is composed of, for example, a polyimide substrate. The substrate 81 has flexibility. The substrate 81 has a plurality of pin insertion holes 81a. The pin insertion holes 81a oppose the first coil 115 and the second coil 125. In each pin insertion hole 81a, a coil pin of the first coil 115 or a coil pin of the second coil 125 (not shown) is disposed.

[0088] Connection terminals 82 are disposed on substrate 81. Connection terminals 82 are opposite to the first oscillation mechanism 110 and the second oscillation mechanism 120. Connection terminals 82 are electrically connected to terminals of a Hall element (not shown). Additionally, for example, four connection terminals 82 are disposed for each Hall element. Three reinforcing plates 83 are disposed on substrate 81. Reinforcing plates 83 are opposite to the first oscillation mechanism 110 and the second oscillation mechanism 120. Reinforcing plates 83 suppress deflection of substrate 81.

[0089] Three magnetic components 84 are disposed on the substrate 81. Two magnetic components 84 are opposed to the second magnet 121 of the second swing mechanism 120. When the second coil 125 is not energized, an attractive force is generated between the second magnet 121 and the magnetic components 84. Therefore, the movable body 2 is disposed at a reference position in the rotational direction centered on the second swing axis A2. The remaining magnetic component 84 is opposed to the first magnet 111 of the first swing mechanism 110. When the first coil 115 is not energized, an attractive force is generated between the first magnet 111 and the magnetic component 84. Therefore, the movable body 2 is disposed at a reference position in the rotational direction centered on the first swing axis A1. The reference position will be explained later.

[0090] like Figures 5A to 5C As shown, the first swing mechanism 110 causes the retainer 20 to swing relative to the first support 30 about the first swing axis A1. The first swing mechanism 110 has a first magnet 111 and a first coil 115. The first coil 115 is opposite to the first magnet 111 in the second direction Y.

[0091] The first magnet 111 is disposed on one of the cage 20 and the second support portion 60. On the other hand, the first coil 115 is disposed on the other of the cage 20 and the second support portion 60. In this embodiment, the first magnet 111 is disposed on the cage 20. The first coil 115 is disposed on the second support portion 60. Therefore, a force acts on the first magnet 111 due to the magnetic field generated when current flows through the first coil 115. Furthermore, the cage 20 swings relative to the first support portion 30. Therefore, the cage 20 can swing using the simple structure of the first magnet 111 and the first coil 115. Additionally, by disposing the first coil 115 on the second support portion 60, the first coil 115 does not swing relative to the second support portion 60. Therefore, compared to the case where the first coil 115 is disposed, for example, on the first support portion 30, wiring of the first coil 115 is easier.

[0092] 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.

[0093] 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.

[0094] 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 respect to the first support portion 30 and the second support portion 60 about the first swing axis Al.

[0095] 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.

[0096] The second swing mechanism 120 swings the first support portion 30 with respect to the second support portion 60 about the second swing axis A2. The second swing mechanism 120 has a second magnet 121 and a second coil 125. 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. Thus, the first support portion 30 can be swung by 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 in which the second coil 125 is disposed on, for example, the first support portion 30.

[0097] 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 a direction intersecting the first direction X in the first support portion 30. In the present embodiment, the second magnet 121 is disposed at the end portion 30a in the third direction Z. The second magnet 121 has an n-pole portion 121a composed of n-poles and an s-pole portion 121b composed of s-poles. The second magnet 121 is polarized in a second direction Y intersecting the first direction X. Thus, the movable body 2 can be caused to oscillate about a second oscillation axis A2 along the direction of incidence of light.

[0098] 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 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 around the entire periphery of the coil facing surface 121c and the inner side surface 121d.

[0099] 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.

[0100] 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.

[0101] In addition, as shown in Figure 1 , in the 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 to be able to detect the posture of the retainer 20 relative to the second support portion 60. In this case, the posture of the retainer 20 relative to the second support portion 60 can be controlled with high precision. In addition, as a sensor that detects the posture of the smartphone 200, for example, a gyro sensor can be used.

[0102] The second pre-pressing portion 140 is provided to at least one of the movable body 2 and the support body 3. The second pre-pressing portion 140 exerts a pre-pressing force on the other of the movable body 2 and the support body 3 in the axial direction of the second swing axis A2. In the present embodiment, the second pre-pressing portion 140 is provided to at least one of the first support portion 30 and the second support portion 60. The second pre-pressing portion 140 exerts a pre-pressing force on the other of the first support portion 30 and the second support portion 60 in the axial direction of the second swing axis A2. Thus, the positional deviation of the first support portion 30 with respect to the second support portion 60 in the axial direction of the second swing axis A2 can be suppressed.

[0103] Specifically, the second pre-pressing portion 140 has a magnetic member 141 and a third magnet 142. The third magnet 142 is provided to one of the movable body 2 and the support body 3. The magnetic member 141 is provided to the other of the movable body 2 and the support body 3. In the present embodiment, the third magnet 142 is provided to one of the first support portion 30 and the second support portion 60. The magnetic member 141 is provided to the other of the first support portion 30 and the second support portion 60. Thus, since a mutually attractive force acts between the third magnet 142 and the magnetic member 141, a pre-pressing force can be exerted on the other of the first support portion 30 and the second support portion 60 in the axial direction of the second swing axis A2. Further, by using the simple structure of the third magnet 142 and the magnetic member 141, a pre-pressing force can be exerted on the other of the movable body 2 and the support body 3 in the axial direction of the second swing axis A2. More specifically, the third magnet 142 is provided to the second support portion 60. The magnetic member 141 is provided to the first support portion 30. Thus, a pre-pressing force can be exerted on the first support portion 30 in the axial direction of the second swing axis A2.

[0104] The magnetic member 141 is a plate-shaped member composed of a magnetic body. The magnetic member 141 is provided to the receiving recess 31k of the first support portion 30. The third magnet 142 is provided to the receiving recess 61f of the second support portion 60. The magnetic member 141 opposes the third magnet 142 in the first direction X. Thus, a mutually attractive force acts between the magnetic member 141 and the third magnet 142.

[0105] The third magnet 142 and the magnetic member 141 are disposed on the second swing axis A2. Thus, the positional relationship between the third magnet 142 and the magnetic member 141 can be prevented from changing when the movable body 2 swings about the second swing axis A2. Thus, the mutually attractive force between the third magnet 142 and the magnetic member 141 can be prevented from fluctuating.

[0106] Hereinafter, the first to seventh modified examples of the present embodiment will be described with reference to Figures 15 to 22 The first to seventh modified examples of the present embodiment will be described. Hereinafter, the points different from the present embodiment shown in FIG. 1 will be described. Figures 1 to 14 The first to seventh modified examples of the present embodiment will be described. Hereinafter, the points different from the present embodiment shown in FIG. 1 will be described.

[0107] (First Modification)

[0108] Referring to Figure 15 A first modification of the embodiment of the present application will be described. In the first modification, a case where the shaft-on protrusion 45 of the first pre-pressing portion 40 is composed of a ball will be described. As shown in FIG. 10, the pair of side surface portions 41 of the first pre-pressing portion 40 has the shaft-on protrusion 45. The shaft-on protrusion 45 protrudes toward the holder 20 on the first swing axis Al. The shaft-on protrusion 45 is composed of a ball. Figure 15

[0109] 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-on protrusion 45 is fixed to the through-hole 41b. The shaft-on protrusion 45 can also be fitted in the through-hole 41b. Further, the shaft-on protrusion 45 can also be fixed to the through-hole 41b using an adhesive, for example. A part of the shaft-on protrusion 45 is housed in the shaft-on recess 22c. Further, the shaft-on protrusion 45 is in point contact with the shaft-on recess 22c.

[0110] (Second Modification)

[0111] Referring to Figure 16 A second modification of the embodiment of the present application will be described. In the second modification, a case where the holder 20 has a shaft-on protrusion 22d will be described. Figure 16 is a cross-sectional view showing the optical unit 1 of the second modification of the embodiment. As shown in FIG. 11, the pair of side surface portions 22 of the holder 20 has the shaft-on protrusion 22d. The shaft-on protrusion 22d protrudes toward the first pre-pressing portion 40 on the first swing axis Al. The shaft-on protrusion 22d has a part of a spherical surface. The shaft-on protrusion 22d has a semispherical shape, for example. Figure 16 The pair of side surface portions 41 of the first pre-pressing portion 40 has a shaft-on recess 41c. The shaft-on recess 41c is recessed toward the side opposite to the holder 20. The shaft-on recess 41c is disposed on the first swing axis Al. The shaft-on recess 41c has a part of a concave spherical surface. A part of the shaft-on protrusion 22d is housed in the shaft-on recess 41c. Further, the shaft-on protrusion 22d is in point contact with the shaft-on recess 41c.

[0112] Further, in the embodiment shown in FIG. 11, an example in which the shaft center protrusion 71 is a ball and the shaft center protrusion 71 is disposed inside the housing recess 61b is shown, but the present application is not limited to this example. That is, as shown in FIG. 12, an example in which the shaft center protrusion 71 is a semispherical protrusion and the shaft center protrusion 71 is disposed inside the housing recess 61b can also be employed.

[0113] Figures 1 to 14 Further, in the embodiment shown in FIG. 11, an example in which the shaft center protrusion 71 is a ball and the shaft center protrusion 71 is disposed inside the housing recess 61b is shown, but the present application is not limited to this example. That is, as shown in FIG. 12, an example in which the shaft center protrusion 71 is a semispherical protrusion and the shaft center protrusion 71 is disposed inside the housing recess 61b can also be employed. Figure 16 ​​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, for example, have a cylindrical front end formed into a hemispherical shape.

[0114] (3rd variation)

[0115] Reference Figure 17 and Figure 18 A third variation of the embodiment of the present invention will be described. In this third variation, the movable body 2 has a central axial protrusion 71 and the support body 3 has a central axial recess 61j. Figure 17 This is a perspective view showing the movable body 2 of the optical unit 1 in the third modified example of this embodiment. Figure 18 This is a perspective view showing the support 3 of the optical unit 1 in the third variation of this embodiment.

[0116] like Figure 17 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 third 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.

[0117] like Figure 18 As 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.

[0118] In the third variation, the central convex portion 71 moves along the inner surface of the central recess portion 61j. Therefore, with Figures 1 to 14 Similarly, the embodiment shown enables the first support portion 30 to swing stably relative to the second support portion 60 about the second swing axis A2.

[0119] In addition, in Figures 1 to 14 In the embodiment shown, an example is shown in which the magnetic member 73 is disposed in the accommodation recess 61d, but the present application is not limited to this example. That is, as shown in Figure 18 The second support portion 60 can also not have the accommodation recess 61d. In this case, the magnetic member 73 can also be disposed on the opposing surface 61a of the second support portion 60.

[0120] (4th Modification Example)

[0121] Referring to Figure 19 A 4th modification example of the embodiment of the present application will be described. Figure 19 is a perspective view showing the movable body 2 of the optical unit 1 of the 4th modification example of the present embodiment. As Figure 19 In the 4th modification example, the support body 31 of the first support portion 30 does not have the accommodation recess 31k. Moreover, the magnetic member 141 of the second pre-pressing portion 140 is disposed on the lower opposing surface 31e of the support body 31.

[0122] (5th Modification Example)

[0123] Referring to Figure 20 A 5th modification example of the embodiment of the present application will be described. In the 5th modification example, a case in which the magnetic member 74 extends along the oscillation direction of the second magnet 121 will be described. Figure 20 is a view showing the second support portion 60, the shaft center protrusion 71, the second magnet 121, and the third magnet 142 of the optical unit 1 of the 5th modification example of the present embodiment from the other side X2 of the first direction X.

[0124] As Figure 20 shown, unlike the magnetic member 73 of the embodiment shown in Figures 1 to 14 , the magnetic member 74 is disposed only one with respect to one second magnet 121. The magnetic member 74 extends along the oscillation direction Bl of the second magnet 121. Therefore, the attractive force acting between the second magnet 121 and the magnetic member 74 can be increased.

[0125] (6th Modification Example)

[0126] Referring to Figure 21 A 6th modification example of the embodiment of the present application will be described. In the 6th modification example, a case in which the magnetic member 75 has a circular arc shape centered on the second oscillation axis A2 will be described. Figure 21 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 6th modification example of the present embodiment from the other side X2 of the first direction X. As Figure 21As shown, the magnetic member 75 extends along the oscillation direction of the second magnet 121 as in the fifth modification example. Also, the magnetic member 75 has a circular arc shape centered on the second oscillation axis A2. The receiving recess 61k has a circular arc shape centered on the second oscillation axis A2 unlike the receiving recess 61d of the embodiment shown. Figures 1 to 14 As shown, the magnetic member 75 extends along the oscillation direction of the second magnet 121 as in the fifth modification example. Also, the magnetic member 75 has a circular arc shape centered on the second oscillation axis A2. The receiving recess 61k has a circular arc shape centered on the second oscillation axis A2 unlike the receiving recess 61d of the embodiment shown.

[0127] Therefore, when the movable body 2 is caused to oscillate centered on the second oscillation axis A2, the area of mutual overlap of the second magnet 121 and the magnetic member 75 can be suppressed from varying in the axis direction of the second oscillation axis A2. Therefore, the force of mutual attraction between the second magnet 121 and the magnetic member 75 can be suppressed from varying.

[0128] (Seventh Modification Example)

[0129] Reference Signs Figure 22 A seventh modification example of the embodiment of the present application will be described. Figure 22 is a sectional view showing the optical unit 1 of the seventh modification example of the present embodiment. As shown in Figure 22 As shown, in the seventh modification example, 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 X2 of the other side of the first direction X in the first support portion 30.

[0130] Therefore, the magnetic member 141 presses the first support portion 30 toward the second support portion 60 by the attractive force between the magnetic member 141 and the third magnet 142. Therefore, it is not necessary to fix the magnetic member 141 to the first support portion 30 using, for example, an adhesive.

[0131] In addition, in the embodiment shown, an example in which the optical element 10 is composed of a prism is shown, but the present application is not limited to this example. For example, as the optical element 10, a reflection member (for example, a mirror) of a thin plate shape can also be used. Figures 1 to 14 In addition, in the embodiment shown, an example in which the first pre-pressing portion 40 is disposed in the first support portion 30 is shown, but the present application is not limited to this example. It can also be that the first pre-pressing portion that applies a pre-pressing force in the axis direction of the first oscillation axis Al is disposed in the retainer 20.

[0132] Figures 1 to 14 In addition, in the embodiment shown, an example in which the first pre-pressing portion 40 is disposed in the first support portion 30 is shown, but the present application is not limited to this example. It can also be that the first pre-pressing portion that applies a pre-pressing force in the axis direction of the first oscillation axis Al is disposed in the retainer 20.

[0133] ​The above describes the embodiments of the present application (including modifications) 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. In addition, 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, the constituent elements in different embodiments can be appropriately combined. For the sake of convenience, the drawings mainly schematically show the respective constituent elements, and the thickness, length, number, interval, and the like of the illustrated constituent elements are sometimes different from the actual ones for the sake of making the drawings. In addition, the material, shape, size, and the like of the respective constituent elements 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.

[0134] Industrial applicability

[0135] The present application can be used for an optical unit, for example.

Claims

1. An optical unit, comprising: an optical element that changes a traveling direction of light, the optical element having a reflecting surface that reflects light traveling in one side of a first direction toward one side of a second direction that intersects the first direction; a holder that holds the optical element; a first support portion that supports the holder so that the holder can swing about a first swing axis; a second support portion that supports the first support portion so that the first support portion can swing about a second swing axis that intersects the first swing axis; a first swing mechanism that causes the holder to swing about the first swing axis with respect to the first support portion; and a second swing mechanism that causes the first support portion to swing about the second swing axis with respect to the second support portion, the first swing mechanism has a first magnet provided to the holder and a first coil provided to the second support portion, the second swing mechanism has a second magnet provided to the first support portion and a second coil provided to the second support portion, the optical unit further comprises a first pre-pressing portion provided to at least one of the holder and the first support portion, the first pre-pressing portion exerts a pre-pressing force on the other of the holder and the first support portion in an axial direction of the first swing axis, the first pre-pressing portion is flexible, the first pre-pressing portion has: a pair of side portions that sandwich the holder in the axial direction of the first swing axis; and a connecting portion that connects the pair of side portions to each other, light traveling in one side of the first direction is reflected toward one side of the second direction in a space surrounded by the pair of side portions and the connecting portion.

2. The optical unit according to claim 1, wherein the first swing axis is an axis extending in a third direction that intersects the first direction and the second direction, and the second swing axis is an axis extending in the first direction.

3. The optical unit according to claim 2, wherein the first support portion supports the holder in the third direction, and the second support portion supports the first support portion in the first direction.

4. The optical unit according to any one of claims 1 to 3, wherein the optical unit comprises a second pre-pressing portion provided to at least one of the first support portion and the second support portion, the second pre-pressing portion exerts a pre-pressing force on the other of the first support portion and the second support portion in an axial direction of the second swing axis.

5. The optical unit according to claim 4, wherein the first pre-pressing portion is metallic.

6. The optical unit according to claim 1, wherein the pair of side portions are inclined with respect to a direction perpendicular to the connecting portion, and a distance between the pair of side portions decreases farther away from the connecting portion.

7. The optical unit according to claim 6, wherein one of the first support portion and the connecting portion has a fitting protrusion that protrudes toward the other of the first support portion and the connecting portion. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The other of the first support portion and the connecting portion has an insertion hole into which the insertion protrusion is inserted.

8. The optical unit according to claim 6 or 7, wherein the side surface portion has an on-axis protrusion that protrudes toward the holder in the first swing axis direction, the holder has: a pair of opposing side surfaces that respectively oppose the pair of side surface portions; a groove that is provided in the opposing side surface; and an on-axis recess that is provided inside the groove, the groove is recessed toward the inside of the holder and extends to the other side in the second direction, the on-axis recess is recessed toward the inside of the holder in the first swing axis direction and accommodates at least a portion of the on-axis protrusion.

9. The optical unit according to claim 8, wherein the on-axis protrusion has at least a portion of a spherical surface, the on-axis recess has at least a portion of a concave spherical surface.

10. The optical unit according to claim 4, wherein the second pre-pressing portion has: a third magnet that is provided in one of the first support portion and the second support portion; and a magnetic member that is provided in the other of the first support portion and the second support portion.

11. The optical unit according to any one of claims 1 to 3, wherein one of the first support portion and the second support portion has at least three shaft center protrusions that protrude toward the other of the first support portion and the second support portion, the at least three shaft center protrusions are provided on the same circumference that is centered on the second swing axis, the other of the first support portion and the second support portion has a shaft center recess that is recessed in a direction opposite to the shaft center protrusions and constitutes a portion of a circle that is centered on the second swing axis, the shaft center recess is in contact with the shaft center protrusions.

12. The optical unit according to claim 11, wherein the second support portion has the shaft center protrusions, the first support portion has the shaft center recess.

13. The optical unit according to any one of claims 1 to 3, wherein the holder has: an opposing surface that opposes the optical element; and three support protrusions that protrude from the opposing surface toward the optical element and support the optical element.

14. The optical unit according to any one of claims 1 to 3, wherein the first magnet is provided at an end portion of the holder on the other side in the second direction, the first coil is provided at an end portion of the second support portion on the other side in the second direction, the second magnet is provided at an end portion of the first support portion in a third direction that intersects the first direction and the second direction, the second coil is provided at an end portion of the second support portion in the third direction.

15. An optical unit having: an optical element that changes a traveling direction of light, the optical element having a reflecting surface that reflects light traveling in a first direction to one side in a second direction that intersects the first direction; a holder that holds the optical element; a first support portion that supports the retainer so that the retainer is able to swing about a first swing axis; a second support portion that supports the first support portion so that the first support portion is able to swing about a second swing axis that intersects the first swing axis; a first swing mechanism that causes the retainer to swing about the first swing axis with respect to the first support portion; and a second swing mechanism that causes the first support portion to swing about the second swing axis with respect to the second support portion, the optical unit further has a first pre-pressing portion that is provided to at least one of the retainer and the first support portion, that exerts a pre-pressing force on the other of the retainer and the first support portion in the axial direction of the first swing axis, and that has flexibility, the first pre-pressing portion has: a pair of side portions that sandwich the retainer in the axial direction of the first swing axis; and a connecting portion that connects the pair of side portions to each other, light that travels in one of the first direction is reflected to one side of the second direction in a space surrounded by the pair of side portions and the connecting portion.

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