Optical Unit

Abstract

To provide an optical unit that swingably supports a movable body having an optical module to a fixed body, in which the thickness in the optical axis direction is reduced without narrowing a swing range.SOLUTION: Provided is an optical unit 1 comprising: a movable body 20 having an optical module 22; a fixed body 10 having side walls 10b, 10c, 10e and 10f and a bottom wall 10B; a swing support mechanism 30 for swingably supporting the movable body 20 to the fixed body 10; and a drive mechanism 41 having coils 11 arranged on the side walls 10b, 10c, 10e and 10f and a magnet 21 located at a position of the movable body 20 that faces the coils 11. A reinforcement part 51 for improving the impact resistance of the bottom wall 10B is provided in a portion on the side of the bottom wall 10B that faces the magnet 21, with the magnet 21 and the reinforcement part 51 directly colliding when the movable body 20 is swung against the fixed body 10 to maximum extent.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] Various optical units have been used in the past. Among these, optical units in which a movable body equipped with an optical module is supported so as to be swingable relative to a fixed body are used. For example, Patent Document 1 discloses an optical unit in which a movable body equipped with an optical module is supported so as to be swingable relative to a fixed body, that is, a lower case, and in which the movable body has a reinforcing plate to prepare for collision of the movable body with the lower case. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-59501 Summary of the Invention [Problem to be solved by the invention]

[0004] By providing a reinforcing portion on the movable body, as in the optical unit of Patent Document 1, damage to the movable body and the fixed body when they collide can be suppressed. However, with such a configuration, the lower case, which serves as the bottom wall, must also be thick and sturdy, which tends to increase the thickness of the optical unit in the optical axis direction. On the other hand, narrowing the distance between the movable body and the fixed body in the optical axis direction to reduce the thickness of the optical unit in the optical axis direction narrows the movable range (swing range) of the movable body relative to the fixed body. Therefore, an object of the present invention is to reduce the thickness in the optical axis direction without narrowing the swing range in an optical unit that supports a movable body having an optical module so that it can swing relative to the fixed body. [Means for solving the problem]

[0005] The optical unit of the present invention comprises a movable body having an optical module, a fixed body having a side wall facing the optical module in a circumferential direction intersecting the optical axis direction of the optical module, and a bottom wall facing the optical module on the opposite side of the subject side in the optical axis direction, a swing support mechanism that supports the movable body so that it can swing relative to the fixed body with a swing axis in a direction intersecting the optical axis direction, and a drive mechanism having a coil arranged on the side wall and a magnet arranged in a position opposite the coil on the movable body, and is characterized in that a reinforcing portion is provided on a part of the side of the bottom wall facing the magnet to improve the impact resistance of the bottom wall, and the magnet and the reinforcing portion directly collide when the movable body is swung to its maximum extent relative to the fixed body.

[0006] According to this aspect, a reinforcement portion is provided on a portion of the bottom wall facing the magnet to improve the impact resistance of the bottom wall. Therefore, the reinforcement portion can prevent damage to the movable body and the fixed body when they collide. Furthermore, by providing the reinforcement portion on a portion of the bottom wall facing the magnet, it is not necessary to make the entire bottom wall thick, and the bottom wall can be made thin, thereby reducing the thickness of the entire optical unit in the optical axis direction. Furthermore, according to this aspect, when the movable body is swung to its maximum extent relative to the fixed body, the magnet and the reinforcement portion collide directly. Thus, since the reinforcement portion is not formed on the movable body, the distance between the magnet and the reinforcement portion in the optical axis direction, i.e., the distance between the movable body and the fixed body in the optical axis direction, can be prevented from becoming too narrow, thereby preventing the swing range from becoming narrow.

[0007] In the optical unit of the present invention, the reinforcing portion can be made of resin, which prevents the magnet from being damaged or coming off the movable body when the magnet collides with the reinforcing portion due to the reinforcing portion being too hard.

[0008] In the optical unit of the present invention, the reinforcing portion may be integrally formed with the bottom wall. By adopting such a configuration, the reinforcing portion can be formed simultaneously with the bottom wall, and the reinforcing portion can be easily formed on the bottom wall.

[0009] In the optical unit of the present invention, the reinforcing portion may be formed of a separate member from the bottom wall, allowing the reinforcing portion and the bottom wall to be formed of optimal materials depending on the properties required of each.

[0010] In the optical unit of the present invention, the movable body may be rectangular when viewed from the optical axis direction, and the magnet may be provided at a position other than the position overlapping the diagonal of the movable body when viewed from the optical axis direction. The corners of the movable body are farther from the center when viewed from the optical axis direction. Therefore, when the distance between the corners of the movable body and the bottom wall is the same as the distance between the portion corresponding to the side of the movable body and the bottom wall, the rotatable range of the movable body is narrowest when the direction in which the corners of the movable body contact the bottom wall is the oscillation axis, i.e., when the magnet is provided at a position overlapping the diagonal of the movable body. Therefore, by making the distance between the corners of the movable body and the bottom wall wider than the distance between the portion corresponding to the side of the movable body and the bottom wall, the rotatable range of the movable body can be effectively widened. In other words, by providing a reinforcing portion at a position other than the position overlapping the diagonal of the movable body, the movable body's range of movement relative to the fixed body until the magnet comes into contact with the reinforcing portion can be widened. Therefore, it is particularly effective to reduce the thickness of the optical unit in the optical axis direction without narrowing the range of swing of the movable body relative to the fixed body. [Effects of the Invention]

[0011] The optical unit of the present invention, in which a movable body having an optical module is supported so as to be swingable relative to a fixed body, can be made thinner in the direction of the optical axis without narrowing the swing range. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is an exploded perspective view of an optical unit according to a first embodiment of the present invention. [Figure 2] 1 is a planar perspective view of an optical unit according to a first embodiment of the present invention. [Figure 3] FIG. 1 is a front cross-sectional view of an optical unit according to a first embodiment of the present invention. [Figure 4] FIG. 10 is a front cross-sectional view of an optical unit according to a second embodiment of the present invention. [Figure 5] FIG. 10 is a front cross-sectional view of an optical unit according to a reference example. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each embodiment, the same components are designated by the same reference numerals and will be described only in the first embodiment. Descriptions of these components will be omitted in subsequent embodiments. In each figure, the X, Y, and Z axes are perpendicular to each other, with views viewed in the +X and -X directions being side views, views viewed in the -Y direction being front views, views viewed in the +Y direction being rear views, views viewed in the -Z direction being top views, and views viewed in the +Z direction being bottom views. The X-axis direction corresponds to the yawing axis direction, the Y-axis direction corresponds to the pitching axis direction, and the Z-axis direction corresponds to both the optical axis direction and the rolling axis direction.

[0014] [Example 1] First, an optical unit 1A according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 3. As will be described in detail below, the optical unit 1A of this embodiment includes a movable body 20 having an optical module 22 and a fixed body 10 surrounding the movable body 20 in a circumferential direction intersecting the optical axis direction (Z-axis direction) of the optical module 22. The optical unit 1A of this embodiment also includes a gimbal mechanism 30 as a swing support mechanism that supports the movable body 20 to be swingable relative to the fixed body 10 around swing axes in directions intersecting the optical axis direction (X-axis direction and Y-axis direction). The optical unit 1A of this embodiment also includes a drive mechanism 41 having a coil 11 (coils 11A and 11B) arranged on the fixed body 10 and a magnet 21 (magnets 21A and 21B) arranged on the movable body 20 at a position facing the coil 11.

[0015] <Overall configuration of optical unit> First, the overall configuration of the optical unit 1A of this embodiment will be described with reference to Figures 1 and 2. The optical unit 1A of this embodiment can be preferably used in cameras, smartphones, and the like. This is because the optical unit 1A of this embodiment can be configured compactly, allowing cameras and smartphones to be configured compactly. However, the optical unit 1A of this embodiment is not limited to cameras and smartphones, and can be used in various devices without any particular limitations on use.

[0016] 1, the optical unit 1A of this embodiment includes a movable body 20 having an optical module 22 in which a lens and the like are provided. It also includes a fixed body 10 including a case 10A that surrounds the movable body 20 in a circumferential direction intersecting the optical axis direction (Z-axis direction) of the optical module 22, and a bottom wall 10B that can cover the case 10A from the -Z direction when the movable body 20 is housed in the case 10A. It also includes a gimbal mechanism 30 between the movable body 20 and the fixed body 10, which has a gimbal frame 31 with spring properties and supports the movable body 20 to be swingable relative to the fixed body 10 around swing axes in the X-axis direction and the Y-axis direction. It also includes a drive mechanism 41 that swings the movable body 20 relative to the fixed body 10.

[0017] <Movable body> 1 and 2, the movable body 20 has a substantially rectangular parallelepiped shape. The optical module 22 is held inside the movable body 20 by an upper surface portion 20a, a lower surface portion 20d, side surface portions 20b and 20e on both sides in the X-axis direction, and side surface portions 20c and 20f on both sides in the Y-axis direction, and is disposed so that the lens protrudes from the upper surface portion 20a, which is the surface of the movable body 20 facing the +Z direction. Magnets 21A constituting the drive mechanism 41 are provided on the side surface portions 20b and 20e on both sides of the movable body 20 in the X-axis direction. Magnets 21B constituting the drive mechanism 41 are provided on the side surface portions 20c and 20f on both sides of the movable body 20 in the Y-axis direction. Here, the magnets 21A and 21B have the same configuration.

[0018] <Fixed body> 1 and 2, the fixed body 10 has a substantially rectangular parallelepiped shape, with a case 10A constituting a top surface 10a, side surfaces 10b and 10e on both sides in the X-axis direction, and side surfaces 10c and 10f on both sides in the Y-axis direction, and a bottom wall 10B constituting a bottom surface 10d. The fixed body 10 surrounds the movable body 20 with the top surface 10a and bottom surface 10d in the Z-axis direction, surrounds the movable body 20 with the side surfaces 10b and 10e in the X-axis direction, and surrounds the movable body 20 with the side surfaces 10c and 10f in the Y-axis direction. Here, a hole 12 through which a lens of the optical module 22 passes is provided in the top surface 10a, which is the surface of the fixed body 10 facing the +Z direction.

[0019] Furthermore, coil 11A constituting drive mechanism 41 is provided on the inner surfaces of side surface portions 10b and 10e on both sides of fixed body 10 in the X-axis direction. Furthermore, coil 11B constituting drive mechanism 41 is provided on the inner surfaces of side surface portions 10c and 10f on both sides of fixed body 10 in the Y-axis direction. Coil 11A is disposed in a position facing magnet 21A, and coil 11B is disposed in a position facing magnet 21B. Here, coil 11A and coil 11B both have the same configuration.

[0020] <Gimbal mechanism> As shown in FIG. 1 , the gimbal mechanism 30 includes a gimbal frame 31 having a rectangular outer shape and a circular hole 33 through which the optical module 22 passes, and connection portions 32 for connecting the movable body 20 and the fixed body 10. The connection portions 32 are formed at the four corners of the rectangular gimbal frame 31, with two diagonal connection portions 32 swingably connected to the movable body 20 and two diagonal connection portions 32 swingably connected to the fixed body 10. Note that the gimbal mechanism 30 can be any general gimbal mechanism conventionally used in optical units, without any particular limitations. The optical unit 1A of this embodiment is configured such that the gimbal mechanism 30 can swing the movable body 20 in the yaw axis direction and the pitch axis direction relative to the fixed body 10. However, a support portion for the movable body 20 relative to the fixed body 10 can also be provided, allowing the movable body 20 to swing in the roll direction relative to the fixed body 10. Note that the gimbal mechanism 30 is omitted in FIG. 2 .

[0021] <Drive mechanism> Next, drive mechanism 41 will be described, but as described above, coil 11A and coil 11B have the same configuration, and magnet 21A and magnet 21B have the same configuration. Therefore, the following description can be regarded as a description of drive mechanism 41 (yawing axis oscillation mechanism) composed of coil 11B and magnet 21B, with the X-axis direction and Y-axis direction interchanged.

[0022] As shown in FIGS. 1 and 2, the drive mechanism 41 includes a pitch axis oscillation mechanism including a coil 11A and a magnet 21A, and a yaw axis oscillation mechanism including a coil 11B and a magnet 21B. However, the configuration is not limited to this, and the drive mechanism 41 may include only one of the pitch axis oscillation mechanism and the yaw axis oscillation mechanism. While the drive mechanism 41 of this embodiment includes two pitch axis oscillation mechanisms (pairs of coil 11A and magnet 21A) and two yaw axis oscillation mechanisms (pairs of coil 11B and magnet 21B), the drive mechanism 41 may include one pitch axis oscillation mechanism and one yaw axis oscillation mechanism, or three or more pitch axis oscillation mechanisms. Furthermore, a support unit for the movable body 20 relative to the fixed body 10 may be provided, which allows the movable body 20 to oscillate in the rolling direction relative to the fixed body 10, and a roll axis oscillation mechanism including a pair of a coil 11 and a magnet 21 may be provided.

[0023] <Reinforcement part> 1 and 2, four reinforcing portions 51 (reinforcing portions 51A) are provided on the +Z direction side of the bottom wall 10B. The reinforcing portions 51 are components for suppressing damage such as deformation of the bottom wall 10B caused by the movable body 20 colliding with the bottom wall 10B when the movable body 20 swings to the maximum extent in the yawing axis direction and the pitching axis direction relative to the fixed body 10.

[0024] Therefore, the reinforcing portion 51, which is a main part of the optical unit 1A of this embodiment, will be described below with reference to Fig. 3 in addition to Fig. 1 and Fig. 2. Note that in the description of the reinforcing portion 51A of this embodiment with reference to Fig. 3 below, the description will also be made with reference to Fig. 5, which is a diagram of an optical unit 100 of a reference example corresponding to Fig. 3, which is a diagram of the optical unit 1A of this embodiment.

[0025] 3, each reinforcing portion 51A is disposed at a position substantially opposite to magnet 21 in the Z-axis direction, and is provided at a position where it comes into contact with magnet 21 when movable body 20 swings to the maximum in the yaw axis direction and pitch axis direction relative to fixed body 10. In other words, when movable body 20 swings to the maximum in the yaw axis direction and pitch axis direction relative to fixed body 10, the portions of movable body 20 other than magnet 21, including each reinforcing portion 51A, are configured not to collide with bottom wall 10B.

[0026] As shown in Fig. 3, in the optical unit 1A of this embodiment, no other components are provided between the reinforcing portion 51A and the magnet 21. The gap G between the reinforcing portion 51A and the magnet 21 can be set to match the preferred range of oscillation of the movable body 20 relative to the fixed body 10. When the movable body 20 oscillates to the maximum extent relative to the fixed body 10, the bottom wall 10B (reinforcing portion 51A) and the magnet 21 collide. However, even if the bottom wall 10B and the magnet 21 collide, the magnet 21 will collide with the reinforcing portion 51A, and therefore the bottom wall 10B will not be deformed or damaged even if the bottom wall 10B is made thin, such as to have a thickness T1 shown in Fig. 3.

[0027] In contrast, as shown in FIG. 5, in the optical unit 100 of the reference example, similar to the optical unit 1A of the present embodiment, no other components are provided between the reinforcing portion 51C and the magnet 21, but the reinforcing portion 51C is provided on the movable body 20 side (below the magnet 21). With this configuration, if the movable body 20 swings to its maximum relative to the fixed body 10 and the bottom wall 10B collides with the movable body 20 (reinforcing portion 51C), there is a risk that the bottom wall 10B will be deformed and damaged if the bottom wall 10B is configured to be thin. Therefore, it is necessary to configure the bottom wall 10B to be thick, as shown by thickness T2 in FIG. 5. If the bottom wall 10B is configured to be thick, the thickness of the entire optical unit in the Z-axis direction will increase.

[0028] Naturally, bottom wall 10B must be thick even in a configuration in which a portion other than magnet 21 collides with bottom wall 10B, such as a configuration in which reinforcing portion 51 is provided on a portion of movable body 20 other than the lower portion (position on the -Z direction side) of magnet 21. Furthermore, by forming reinforcing portion 51 on movable body 20, for example, by forming reinforcing portion 51 on both bottom wall 10B and movable body 20, the gap G between magnet 21 and reinforcing portion 51 in the optical axis direction, i.e., the gap between movable body 20 and fixed body 10 in the optical axis direction, may become too narrow. If the gap between movable body 20 and fixed body 10 in the optical axis direction becomes too narrow, the range in which movable body 20 can swing relative to fixed body 10 becomes narrow.

[0029] To summarize, the optical unit 1A of this embodiment includes a movable body 20 having an optical module 22. The optical unit 1A of this embodiment also includes a fixed body 10 having a case 10A having side walls 10b, 10c, 10e, and 10f that face the optical module 22 in a circumferential direction intersecting the optical axis direction of the optical module 22, and a bottom wall 10B that faces the optical module 22 on the side opposite the subject side in the optical axis direction (the -Z direction side). The optical unit 1A of this embodiment also includes a gimbal mechanism 30 as a swing support mechanism that swingably supports the movable body 20 relative to the fixed body 10 around a swing axis in a direction intersecting the optical axis direction (the yaw axis direction and the pitch axis direction). The optical unit 1A of this embodiment also includes a drive mechanism 41 that includes a coil 11 arranged on the side walls 10b, 10c, 10e, and 10f, and a magnet 21 arranged on the movable body 20 at a position facing the coil 11. As described above, a reinforcing portion 51 that improves the impact resistance of the bottom wall 10B is provided on a portion of the side of the bottom wall 10B facing the magnet 21, and when the movable body 20 is swung to the maximum extent relative to the fixed body 10, the magnet 21 and the reinforcing portion 51 directly collide with each other.

[0030] As described above, the optical unit 1A of this embodiment is provided with a reinforcing portion 51 on a portion of the bottom wall 10B facing the magnet 21, which improves the impact resistance of the bottom wall 10B. The reinforcing portion 51 can prevent damage to the movable body 20 and the fixed body 10 when the movable body 20 and the fixed body 10 collide. Furthermore, since the reinforcing portion 51 is provided on a portion of the bottom wall 10B facing the magnet 21, the optical unit 1A of this embodiment does not need to have a thick bottom wall 10B overall. This allows the bottom wall 10B to be thin, thereby reducing the overall thickness of the optical unit 1A in the optical axis direction. Furthermore, the optical unit 1A of this embodiment is configured so that the magnet 21 and the reinforcing portion 51 directly collide when the movable body 20 is swung to the maximum extent relative to the fixed body 10. In this way, since the reinforcing portion 51 is not formed on the movable body 20, the distance G between the magnet and the reinforcing portion in the optical axis direction, i.e., the distance between the movable body 20 and the fixed body 10 in the optical axis direction, can be prevented from becoming too narrow, and the swing range can be prevented from becoming narrow.

[0031] Here, in the optical unit 1A of this embodiment, each reinforcing portion 51A is made of resin. By making the reinforcing portions 51 out of resin in this way, it is possible to prevent the magnets 21 from being damaged or coming off the movable body 20 when the magnets 21 collide with the reinforcing portions 51 because the reinforcing portions 51 are too hard. However, the present invention is not limited to this configuration, and the reinforcing portions 51 may be made of a material other than resin.

[0032] 2, in the optical unit 1A of this embodiment, the movable body 20 is rectangular when viewed from the optical axis direction, and the magnet 21 is provided at a position that does not overlap with the diagonal line L1 of the movable body 20 when viewed from the optical axis direction. When viewed from the optical axis direction, the corner 20h of the movable body 20 is farther from the center 20i. Therefore, when the distance G between the corner 20h of the movable body 20 and the bottom wall 10B is the same as the distance G between the portion corresponding to the side of the movable body 20 (side portions 10b, 10c, 10e, and 10f) and the bottom wall 10B, the rotatable range of the movable body 20 is narrowest when the direction in which the corner 20h of the movable body 20 contacts the bottom wall 10B is the oscillation axis, i.e., when the magnet 21 is provided at a position that overlaps with the diagonal line of the movable body 20. Therefore, by making the distance G between the corner portion 20h of the movable body 20 and the bottom wall 10B wider than the distance G between the portion corresponding to the side of the movable body 20 and the bottom wall 10B, the rotatable range of the movable body 20 can be effectively widened. In other words, by arranging the reinforcing portion 51 at a position other than the position overlapping with the diagonal line L1 of the movable body 20, the movable range of the movable body 20 relative to the fixed body 10 until the magnet 21 and the reinforcing portion 51 come into contact can be widened. Therefore, in the optical unit 1A of this embodiment, it is particularly effective to reduce the thickness of the optical unit 1A in the optical axis direction without narrowing the swing range of the movable body 20 relative to the fixed body 10.

[0033] Furthermore, in the optical unit 1A of this embodiment, each reinforcing portion 51A is made of resin, and the bottom wall 10B is made of a different type of resin than the resin that makes up the reinforcing portion 51A. That is, in the optical unit 1A of this embodiment, as shown in FIG. 3, each reinforcing portion 51A is made of a separate material from the bottom wall 10B. By making the reinforcing portion 51 and the bottom wall 10B out of separate materials in this way, the reinforcing portion 51 and the bottom wall 10B can each be made of an optimal material depending on the characteristics required of each. However, this configuration is not limited to this. For example, the reinforcing portion 51 may be made of a material other than resin, such as metal, or the bottom wall 10B may be made of metal or the same resin as the reinforcing portion 51.

[0034] [Example 2] Next, an optical unit 1B of Example 2 as an optical unit 1 of the present invention will be described with reference to FIG. 4. Here, FIG. 4 is a front cross-sectional view of the optical unit 1B of this example, and corresponds to FIG. 3 showing the optical unit 1A of Example 1. Note that components common to Example 1 above are denoted by the same reference numerals, and detailed description thereof will be omitted. The optical unit 1B of this example has the same configuration as the optical unit 1A of Example 1, except for the configuration of the parts described below. Therefore, except for the parts described below, it has the same technical features as the optical unit 1A of Example 1.

[0035] As shown in Fig. 3, in the optical unit 1A of Example 1, the reinforcing portion 51A is formed as a separate member from the bottom wall 10B. On the other hand, as shown in Fig. 4, in the optical unit 1B of this example, the reinforcing portion 51B is formed integrally with the bottom wall 10B. With this configuration, the reinforcing portion 51 can be formed simultaneously with the bottom wall 10B, and the reinforcing portion 51 can be easily formed on the bottom wall 10B.

[0036] The present invention is not limited to the above-described embodiments, and can be realized in various configurations without departing from the spirit of the present invention. For example, the technical features in the embodiments corresponding to the technical features in each aspect described in the Summary of the Invention can be appropriately replaced or combined to solve some or all of the above-described problems or achieve some or all of the above-described effects. Furthermore, if a technical feature is not described as essential in this specification, it can be appropriately deleted. [Explanation of symbols]

[0037] 1...optical unit, 1A...optical unit, 1B...optical unit, 10...fixed body, 10a...upper surface portion, 10b...side surface portion (side wall), 10c...side surface portion (side wall), 10d...lower surface portion, 10e...side surface portion (side wall), 10f...side surface portion (side wall), 10A...case portion, 10B...bottom wall, 11A...coil, 11B...coil, 12...hole portion, 20...movable body, 20a...upper surface portion, 20b...side surface portion, 20c... Side portion, 20d...underside portion, 20e...side portion, 20f...side portion, 20h...corner portion, 20i...center, 21A...magnet, 21B...magnet, 22...optical module, 30...gimbal mechanism (swing support mechanism), 31...gimbal frame portion, 32...connection portion, 33...hole portion, 41...drive mechanism, 51...reinforcement portion, 51A...reinforcement portion, 51B...reinforcement portion, 51C...reinforcement portion, 100...optical unit, G...gap

Claims

1. a movable body having an optical module; a fixed body having a side wall facing the optical module in a peripheral direction intersecting the optical axis direction of the optical module, and a bottom wall facing the optical module on the side opposite to the subject side in the optical axis direction; a swing support mechanism that supports the movable body so that the movable body can swing relative to the fixed body around a swing axis in a direction intersecting the optical axis direction; a drive mechanism including a coil disposed on the side wall and a magnet disposed on a side surface of the movable body at a position facing the coil; Equipped with a reinforcing portion for improving the impact resistance of the bottom wall is provided on a portion of the bottom wall facing the magnet; When the movable body is swung to a maximum extent relative to the fixed body, the magnet and the reinforcing portion directly collide with each other, An optical unit characterized in that the reinforcing portion is shorter in the direction of extension when viewed from the optical axis direction of the side portion on which the collision magnet is located than the collision magnet that collides when the movable body is swung to its maximum extent relative to the fixed body.

2. 2. The optical unit according to claim 1, The optical unit is characterized in that the reinforcing portion is made of resin.

3. 3. The optical unit according to claim 1, The optical unit is characterized in that the reinforcing portion is integrally formed with the bottom wall.

4. 3. The optical unit according to claim 1, The optical unit is characterized in that the reinforcing portion is formed of a separate member from the bottom wall.

5. 5. The optical unit according to claim 1, the movable body has a rectangular shape when viewed from the optical axis direction, The optical unit is characterized in that the magnet is provided at a position different from a position overlapping with a diagonal line of the movable body when viewed from the optical axis direction.

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