Optical unit

Abstract

To suppress scattering of multiple flexible wiring boards that are disposed in an overlapping manner.SOLUTION: An optical unit 10 includes a fixing body 16, an optical module 12, multiple flexible wiring boards 51 disposed in an overlapping manner and having one end connected to the optical module 12, a holder 22 housing the optical module 12 and holding the optical module 12 and the flexible wiring boards 51 pivotally with respect to the fixing body 16, and a fixing part 70 that fixes the flexible wiring boards 51 to the holder 22. The fixing part 70 includes a projection 90 formed on a fixing surface 72a of the holder 22, and a flat plate part 60 where a hole part 91 to be fitted to the projection 90 is formed. The fixing surface 72a and the flat plate part 60 have the overlapped flexible wiring boards 51 held and fixed therebetween.SELECTED DRAWING: Figure 6

Description

Technical Field

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

Background Art

[0002] Conventionally, various optical units including an optical module and a flexible printed circuit board have been used. Also, in various devices including a flexible printed circuit board, various configurations for fixing the flexible printed circuit board have been disclosed. For example, Patent Document 1 discloses a configuration in which a flexible printed circuit board is sandwiched between two pressing plates.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In an optical unit including an optical module and a flexible printed circuit board, the optical module may be swung with respect to a fixed body. In such a case, the flexible printed circuit board also swings along with the swing of the optical module with respect to the fixed body. Although there are various configurations of the flexible printed circuit board, there are cases where a plurality of flexible printed circuit boards are stacked and arranged so that the flexible printed circuit board is likely to swing. However, when a plurality of flexible printed circuit boards are stacked and arranged, the flexible printed circuit boards stacked in a plurality may scatter (become separated) along with the swing of the flexible printed circuit board.

Means for Solving the Problems

[0005] The optical unit of the present invention includes a fixed body, an optical module, a flexible printed circuit board that is stacked in multiple layers and has one end connected to the optical module, a holder that houses the optical module and holds the optical module and the flexible printed circuit board so as to be swingable with respect to the fixed body, and a fixing portion that fixes the flexible printed circuit board to the holder. The fixing portion has a protrusion formed on the fixing surface and a flat plate portion formed with a hole into which the protrusion fits, and sandwiches and fixes the flexible printed circuit boards in a stacked state between the fixing surface and the flat plate portion.

[0006] According to this aspect, the fixing portion has a protrusion formed on the fixing surface and a flat plate portion formed with a hole into which the protrusion fits, and sandwiches and fixes the flexible printed circuit boards in a stacked state between the fixing surface and the flat plate portion. That is, with such a configuration, the flexible printed circuit boards can be firmly sandwiched and fixed by the flat plate portion fixed by the protrusion and the hole and the fixing surface in a state where multiple flexible printed circuit boards are stacked, and it is possible to effectively suppress the scattered flexible printed circuit boards arranged in multiple layers.

[0007] In the optical unit of the present invention, the fixing portion can fix the flexible printed circuit boards in a stacked state on the first surface as the fixing surface of the holder and the second surface intersecting the first surface. The flexible printed circuit boards arranged in multiple layers are likely to scatter when the holder is swung because they are bent. However, with such a configuration, the flexible printed circuit boards in a bent state can be fixed in a state where multiple flexible printed circuit boards are stacked on each of the multiple fixing surfaces, and it is possible to particularly effectively suppress the scattered flexible printed circuit boards arranged in multiple layers.

[0008] In the optical unit of the present invention, the flat plate portion may be composed of one member having a first flat plate portion facing the first surface and a second flat plate portion facing the second surface. With such a configuration, the flexible printed circuit board can be easily fixed to the holder.

[0009] In the optical unit of the present invention, the flat plate portion can be configured to include a first flat plate portion facing the first surface and a second flat plate portion configured as a separate member from the first flat plate portion and facing the second surface. By adopting such a configuration, the configuration of the flat plate portion can be simplified, and the fixing portion can be easily configured.

[0010] In the optical unit of the present invention, the flat plate portion can be configured to be attached to the flexible printed circuit board. By adopting such a configuration, the flexible printed circuit board can be easily and accurately positioned and fixed to the holder.

[0011] In the optical unit of the present invention, the flexible printed circuit board is not attached to the flat plate portion, and the flexible printed circuit board can be configured to be fixed to the fixing surface by fixing the flat plate portion to the fixing surface. By adopting such a configuration, the fixing position of the flexible printed circuit board with respect to the holder can be easily changed.

[0012] In the optical unit of the present invention, the fixing portion can be configured such that the flat plate portion is press-fitted into the holder to fix the flat plate portion to the holder. By adopting such a configuration, the flat plate portion can be easily and firmly fixed to the holder.

[0013] In the optical unit of the present invention, the fixing portion can be configured to include a plurality of protrusions and holes. By adopting such a configuration, the flexible printed circuit board can be particularly firmly fixed to the holder.

[0014] In the optical unit of the present invention, the protrusion can be configured to have an anti-loosening shape that suppresses coming out of the hole when fitted in the hole. By adopting such a configuration, it is possible to effectively suppress the flat plate portion coming out of the protrusion and the flexible printed circuit board scattering.

[0015] In the optical unit of the present invention, the protrusion may be configured such that an anti-rotation shape is formed to suppress rotation with respect to the hole portion when the protrusion is fitted into the hole portion. With such a configuration, it is possible to suppress the protrusion from rotating with respect to the hole portion and the flexible wiring board from being displaced with respect to the holder, and to accurately position the flexible wiring board with respect to the holder by accurately positioning the protrusion with respect to the hole portion.

Effects of the Invention

[0016] The optical unit of the present invention can suppress the scattering of flexible wiring boards arranged in a plurality of layers.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Mode for Carrying Out the Invention

[0018] [Example 1] First, the optical unit 10 according to Example 1 of the present invention will be described with reference to FIGS. 1 to 7. In FIGS. 2 and 3, the dashed-dotted line marked with the symbol L indicates the optical axis, the dashed-dotted line marked with the symbol L1 indicates the first axis intersecting the optical axis, and the dashed-dotted line marked with the symbol L2 indicates the second axis L2 intersecting the optical axis L and the first axis L1. And the R direction is the direction around the optical axis. Also, in each figure, the Z-axis direction is the optical axis direction, the X-axis direction is the direction intersecting the optical axis, in other words, the axial direction of yawing, and the Y-axis direction is the direction intersecting the optical axis, in other words, the axial direction of pitching.

[0019] <Outline of the overall configuration of the optical unit> Using FIGS. 1 to 4, an outline of the configuration of the optical unit 10 according to this embodiment will be described. The optical unit 10 includes a movable body 14 having an optical module 12 such as a lens 12a and an imaging element 50, and a fixed body 16 that holds the movable body 14 in a displaceable state in a direction (pitching direction) having the Y-axis direction as a rotation axis (oscillation axis) and a direction (yawing direction) having the X-axis direction as a rotation axis (oscillation axis). Further, the optical unit 10 includes a rotational drive mechanism 18 that drives the movable body 14 in the pitching direction and the yawing direction, and a support mechanism 20 that rotatably (oscillatably) supports the movable body 14 with respect to the fixed body 16 in the pitching direction and the yawing direction. Furthermore, the optical unit 10 includes a first support portion 19a that rotatably supports the movable body 14 around a first axis L1 in an extended portion 27a for the first support portion, and a gimbal mechanism 21 that includes a second support portion 19b that is rotatably supported by a member on the fixed body 16 side around a second axis L2 in an extended portion 27b for the second support portion (see FIG. 3).

[0020] Also, as shown in FIG. 3, the optical unit 10 of this embodiment includes a movable unit 100 and a case 200 that houses the movable unit 100. Here, as shown in FIG. 3, the movable unit 100 is configured by the optical module 12, the imaging element 50, a flexible wiring board 51 connected to the imaging element 50, and the like. The movable unit 100 forms a part of the movable body 14. And a fixed frame 28 that is a housing portion that houses the movable body 14 in an oscillatable manner, a holder 22 having a fixing portion 70 that fixes the flexible wiring board 51, and the like configure the case 200 that houses the movable unit 100. Note that the holder 22 forms a part of the case 200, but since it oscillates with respect to the fixed body 16 (fixed frame 28) together with the optical module 12, it can be regarded as forming a part of the movable body 14.

[0021] <Regarding the optical module> In this embodiment, the optical module 12 is formed in a substantially rectangular housing shape and is used as, for example, a thin camera mounted on a camera-equipped mobile phone, a tablet PC, or the like. The optical module 12 includes a lens 12a on the subject side, and optical devices for imaging and the like are built into a rectangular housing-shaped housing 12b. As an example, the optical module 12 in this embodiment incorporates an actuator for correcting pitching shake (shake in the rotation direction with the Y-axis direction as the rotation axis) and yawing shake (shake in the rotation direction with the X-axis direction as the rotation axis) that occur in the optical module 12, and is configured to be able to correct pitching shake and yawing shake.

[0022] Note that in this embodiment, the optical module 12 is configured to be able to correct pitching shake and yawing shake, but is not limited to this configuration. For example, a configuration that can correct only one of pitching shake and yawing shake may also be used. Note that the imaging element 50 can also be regarded as part of the optical module 12.

[0023] <Regarding the movable body> In FIGS. 1 to 4, the movable body 14 includes the optical module 12, a holder 22, and magnets 24A and 24B. The holder 22 is configured as a rectangular frame-shaped member that surrounds the remaining four surfaces excluding the front surface (the surface on the subject side) where the lens 12a of the optical module 12 is provided and the opposite rear surface. As an example, the holder 22 in this embodiment is configured to be detachable from the optical module 12. However, the optical module 12 and the holder 22 may be integrally configured. Using the two surfaces of the holder 22 that face the fixed body 16, the magnets 24A and 24B for correcting pitching and yawing are attached to these outer surfaces.

[0024] <Regarding the fixed body> In FIGS. 1 to 4, the fixed body 16 includes a fixed frame 28, and coils 32A and 32B. In the present embodiment, the fixed frame 28 includes a rectangular frame-shaped member 128 provided so as to surround at least three surfaces of the holder 22 of the movable body 14 in the direction around the optical axis (R direction), and an extension portion 228 having wall portions 228a, 228b, 228c, and 228d extending outward along the X-axis direction. Here, the wall portion 228a is a wall portion that covers the front surface (the surface on the subject side), the wall portions 228b and 228c are wall portions that cover the Y-axis direction, and the wall portion 228d is a wall portion that covers the side opposite to the side where the movable body 14 is disposed in the X-axis direction. Although omitted in FIGS. 1 to 4, a wall portion is also provided on the side facing the wall portion 228a in the Z-axis direction.

[0025] Note that the fixed body 16 of the present embodiment is configured to be able to cover the flexible printed circuit board 51, which will be described later, with the wall portions 228a, 228b, 228c, 228d, and a wall portion (not shown) on the side facing the wall portion 228a, and a positioning portion 52 (see FIG. 4) for positioning the position of the flexible printed circuit board 51 in the Y-axis direction and the Z-axis direction is provided. By providing a cover that covers at least a part of the flexible printed circuit board 51 as in the optical unit 10 of the present embodiment, it is possible to suppress damage caused by the flexible printed circuit board 51 coming into contact with other component members.

[0026] As shown in FIG. 2 and the like, the coils 32A and 32B are respectively attached to the coil attachment portion 28a. In the present embodiment, the coils 32A and 32B are configured as winding coils as an example, but may also be a pattern substrate (coil substrate) in which the coils are incorporated into the substrate wiring as patterns.

[0027] In the present embodiment, in a state where the movable body 14 is disposed within the fixed body 16, the magnet 24A and the coil 32A, and the magnet 24B and the coil 32B are in a facing state. Further, in the present embodiment, the pair of the magnet 24A and the coil 32A, and the pair of the magnet 24B and the coil 32B constitute the rotational drive mechanism 18. The rotational drive mechanism 18 corrects the pitching and yawing of the movable body 14.

[0028] Also, the pitching and yawing corrections are performed as follows. When a shake occurs in both directions or either one direction of the pitching direction and the yawing direction in the optical unit 10, the shake is detected by a magnetic sensor (Hall element) (not shown), and based on the result, the rotational drive mechanism 18 is driven. Alternatively, a shake detection sensor (gyroscope) or the like may be used to detect the shake of the optical unit 10. Based on the shake detection result, the rotational drive mechanism 18 acts to correct the shake. That is, currents are passed through the coils 32A and 32B so as to move the movable body 14 in a direction to cancel out the shake of the optical unit 10, thereby correcting the shake.

[0029] As described above, the optical unit 10 of the present embodiment includes the rotational drive mechanism 18 that rotates the movable body 14 with respect to the fixed body 16 about the axial directions of pitching and yawing as rotation axes. Here, the rotational drive mechanism 18 is preferably disposed at a position other than the side (+X direction side) where the flexible wiring board 51 is disposed in the X-axis direction with respect to the movable body 14. Since the rotational drive mechanism 18 can be disposed on the side where the flexible wiring board 51 is not formed, it is not necessary to increase the size of the optical unit 10 in order to suppress the contact between the rotational drive mechanism 18 and the flexible wiring board 51, and thus the optical unit 10 can be miniaturized. Note that the "rotation" in the present specification does not require a 360° rotation and includes a case of swinging in the rotation direction.

[0030] Note that the drive source for the operation of correcting the shake is not limited to a voice coil motor composed of each pair of coils 32A and 32B and magnets 24A and 24B such as the rotary drive mechanism 18. It is also possible to use a stepping motor, a piezo element, or the like as another drive source.

[0031] <Regarding the support mechanism> The support mechanism 20 has a sheet metal 20a that forms a hemispherical convex surface facing the outside of the optical unit 10 and a sheet metal 20b that forms a hemispherical convex surface facing the inside of the optical unit 10. The sheet metal 20a is disposed at two opposing locations among the four corners of the rectangular frame-shaped member 128 of the fixed body 16, and the sheet metal 20b is disposed at two opposing locations among the four corners of the rectangular frame-shaped movable body 14. Note that the rectangular frame-shaped member 128 and the rectangular frame-shaped movable body 14 are arranged such that the positions of the four corners are aligned, and the sheet metal 20a and the sheet metal 20b are disposed at one of the four corners each.

[0032] In the support mechanism 20 of this embodiment, the first support portion 19a provided in the extension portion 27a for the first support portion of the gimbal mechanism 21 is disposed inside the hemispherical convex surface of the sheet metal 20a facing the outside. The support mechanism 20 supports the gimbal mechanism 21 with respect to the fixed body 16 with such a configuration. Also, the second support portion 19b provided in the extension portion 27b for the second support portion of the gimbal mechanism 21 is disposed inside the hemispherical convex surface of the sheet metal 20b facing the inside. The support mechanism 20 supports the gimbal mechanism 21 with respect to the movable body 14 with such a configuration. That is, the support mechanism 20 of this embodiment is configured to rotatably support the movable body 14 with respect to the fixed body 16 with one or a plurality of directions (at least one of the X-axis direction and the Y-axis direction) intersecting the optical axis direction (Z-axis direction) as the rotation axis direction. Note that the support mechanism 20 of this embodiment is configured to allow the rotation of the movable body 14 with the axial direction of pitching as the rotation axis and the rotation of the movable body 14 with the axial direction of yawing as the rotation axis, but may also be configured to allow the rotation of the movable body 14 in the rolling direction.

[0033] <Gimbal mechanism> The gimbal mechanism 21 is a mechanism having spring properties formed by bending a flat metal material. Specifically, the gimbal mechanism 21 includes, as an example, a gimbal frame portion 25 provided on the subject side, and a first support portion extending portion 27a and a second support portion extending portion 27b formed by bending 90° in the optical axis direction from the four corner portions of the gimbal frame portion 25. The first support portion extending portion 27a and the second support portion extending portion 27b do not necessarily have to be entirely plate-shaped, and only a part of them may be formed in a plate shape to exhibit spring properties. Also, one of the first support portion extending portion 27a and the second support portion extending portion 27b can be formed into a shape other than a plate shape (for example, a rod shape, etc.).

[0034] <Image sensor> As shown in FIGS. 3 and 4, the optical module 12 includes an image sensor 50 on the side opposite to the subject side. And, as shown in FIG. 4, a flexible printed circuit board 51 is connected to the connection portion 50a of the image sensor 50. Here, the connection portion 50a of the image sensor 50 in this embodiment is formed on the extending portion 228 side, and is configured to cover the flexible printed circuit board 51 in a direction other than the side opposite to the subject side by the wall portion 228a, the wall portion 228b, and the wall portion 228c of the extending portion 228. Note that the connection portion 50a of the flexible printed circuit board 51 does not have to be provided on the image sensor 50, and may be provided on a portion of the movable body 14 other than the image sensor 50.

[0035] <Flexible printed circuit board> As shown in FIG. 4, one end of the flexible printed circuit board 51 is connected to a connection portion 50a provided on the movable body 14. As described above, the flexible printed circuit board 51 is disposed on the +X direction side with respect to the movable body 14. Here, on one end side (connection portion 50a side) of the flexible printed circuit board 51, two flat plate portions 60 (first flat plate portion 60A and second flat plate portion 60B) are adhered to the surface 510 of the flexible printed circuit board 51 and fixed, and the two flat plate portions 60 are fixed to a mounting portion 72 formed in the holder 22 in the fixing portion 70. Further, the other end side (positioning portion 52 side) of the flexible printed circuit board 51 is fixed to the extending portion 228 by the positioning portion 52 and thus is positioned with respect to the fixing frame 28. Note that the flexible printed circuit board 51 of the present embodiment is configured by laminating a plurality of layers (three layers) (see FIG. 6).

[0036] <Fixing portion> Hereinafter, in addition to FIGS. 1 to 4, with reference to FIGS. 5 to 7, a more detailed configuration of the fixing portion 70 will be described. As shown in FIGS. 5 and 6 and the like, the fixing portion 70 includes a mounting portion 72 formed in the holder 22 and two flat plate portions 60. The mounting portion 72 sandwiches the flexible printed circuit board 51 between the flat first flat plate portion 60A and the mounting surface 72a of the mounting portion 72 of the holder 22, and fits and press-fits a hole portion 91 formed in the flat first flat plate portion 60A onto a protrusion 90 formed in the mounting portion 72 of the holder 22, thereby fixing the flexible printed circuit board 51 to the holder 22. Note that, as shown in FIGS. 6 and 7, the flexible printed circuit board 51 is provided with a hole portion 51h into which the protrusion 90 can be inserted.

[0037] Further, the mounting portion 72 sandwiches the flat second flat plate portion 60B together with the flexible printed circuit board 51 by the groove portions 71 formed on both the +Y direction side and the -Y direction side, bringing the flexible printed circuit board 51 into contact with the contact surface 72b of the mounting portion 72 of the holder 22 and fixing the flexible printed circuit board 51 to the holder 22. Specifically, the groove portions 71 extend in the Z-axis direction, and the second flat plate portion 60B is inserted (press-fitted) into the groove portions 71 in the +Z direction so that the end portion 61 of the second flat plate portion 60B fits into the groove portions 71, whereby the second flat plate portion 60B is fixed to the fixing portion 70. Note that a slope 71a is formed at the tip portion on the +Z side that constitutes the groove portion 71 of the mounting portion 72 so that the end portion 61 can be easily inserted into the groove portion 71. In the present embodiment, the protrusion 90 is provided only on the first flat plate portion 60A and the hole portion 91 is provided only on the mounting surface 72a, but the protrusion 90 may be provided only on the second flat plate portion 60B and the hole portion 91 may be provided only on the contact surface 72b, or the protrusion 90 may be provided on both the first flat plate portion 60A and the second flat plate portion 60B and the hole portion 91 may be provided on both the mounting surface 72a and the contact surface 72b.

[0038] By press-fitting the first flat plate portion 60A and the second flat plate portion 60B into the holder 22, one end side (connection portion 50a side) of the flexible printed circuit board 51 is fixed to the holder 22 that constitutes the movable body 14. On the other hand, as described above, the other end side (positioning portion 52 side) of the flexible printed circuit board 51 is fixed to the fixing frame 28 that constitutes the fixed body 16. Therefore, the flexible printed circuit board 51 is displaced as the movable body 14 swings with respect to the fixed body 16. If the flexible printed circuit board 51 is short, it will prevent the movable body 14 from swinging with respect to the fixed body 16. Therefore, the flexible printed circuit board 51 is configured to be curved in an S shape inside the extension portion 228 to increase its length so as not to prevent the movable body 14 from swinging with respect to the fixed body 16. Note that since the flexible printed circuit board 51 of the present embodiment is composed of three layers as described above, it is difficult to increase the length by bending the flexible printed circuit board 51 in the Z-axis direction.

[0039] Also, as shown in FIG. 6, on the fixing portion 70, a mounting portion 72 for attaching the first flat plate portion 60A and the second flat plate portion 60B is formed on the holder 22. The mounting portion 72 has a mounting surface 72a on which the surface 513 (the surface opposite to the surface 510) of the flexible printed circuit board 51 is placed in the region 512 where the first flat plate portion 60A is adhered, and a contact surface 72b that contacts the surface 513 of the region 511 of the flexible printed circuit board 51 where the second flat plate portion 60B is adhered. Since the fixing portion 70 has such a configuration, the flexible printed circuit board 51 connected to the connecting portion 50a has a first bending portion 51b, a second bending portion 51c, and a flat region 51a formed toward the other end side.

[0040] Here, when the flexible printed circuit board 51 configured by overlapping a plurality of layers is configured such that the first bending portion 51b, the second bending portion 51c, and the flat region 51a are formed from the connecting portion 50a side toward the other end side in this way, it is easy to spread in the flat region 51a. However, the fixing portion 70 of the present embodiment sandwiches the flexible printed circuit board 51 configured by overlapping a plurality of layers between the first flat plate portion 60A and the mounting surface 72a, and firmly fixes it with the protrusion 90 and the hole portion 91. Therefore, it is possible to effectively suppress the flexible printed circuit board 51 configured by overlapping a plurality of layers from spreading in the flat region 51a.

[0041] In the present embodiment, the groove portion 71 is in the direction along the Z-axis direction. Therefore, the region 511 is perpendicular to the region 512 (flat region 51a). However, it is not limited to such a configuration. The extending direction of the groove portion 71 (the inserting direction of the end portion 61 of the second flat plate portion 60B) may be a direction different from the direction perpendicular to the flat region 51a. In other words, by adjusting the extending direction of the groove portion 71, the angle of the region 511 with respect to the flat region 51a can be adjusted.

[0042] As shown in FIGS. 6 and 7, the planar region 51a extends in a direction along the mounting surface 72a. Then, as shown in FIG. 7, on the extension line M in the -X direction of the planar region 51a, there is an arrangement where the swing center C1 (the positions of the pitching rotation axis and the yawing rotation axis) of the movable body 14 having the optical module 12 is located. In other words, on the extension line M in the -X direction of the mounting surface 72a, there is an arrangement where the swing center C1 of the movable body 14 having the optical module 12 is located. In this way, by arranging the flexible wiring board 51 such that the swing center C1 of the optical module 12 is located on the extension line M of the planar region 51a of the flexible wiring board 51, the load applied to the flexible wiring board 51 when the optical module 12 is swung with respect to the fixed body 16 can be reduced. However, it is not limited to such a configuration.

[0043] Here, to summarize once, the optical unit 10 of this embodiment includes a fixed body 16, an optical module 12, and a flexible wiring board 51 that is arranged in a stacked manner and has one end connected to the optical module 12. Further, the optical unit 10 of this embodiment includes a holder 22 that houses the optical module 12 and holds the optical module 12 and the flexible wiring board 51 swingably with respect to the fixed body 16, and a fixing portion 70 that fixes the flexible wiring board 51 to the holder 22. Here, the fixing portion 70 has a protrusion 90 formed on the mounting surface 72a as a fixing surface, and a flat plate portion 60 (first flat plate portion 60A) in which a hole portion 91 for fitting the protrusion 90 is formed. Also, the fixing portion 70 sandwiches and fixes the flexible wiring board 51 in a state where a plurality of flexible wiring boards 51 are stacked between the fixing surface (mounting surface 72a) and the flat plate portion 60 (first flat plate portion 60A).

[0044] By having such a configuration, the optical unit 10 of this embodiment can firmly sandwich and fix a plurality of stacked flexible printed circuit boards 51 between the protrusion 90, the flat plate portion 60 fixed by the hole portion 91, and the mounting surface 72a. That is, the optical unit 10 of this embodiment can effectively suppress the scattering of the flexible printed circuit boards 51 arranged in a plurality of stacked layers. Further, by providing a hole portion 51h in the flexible printed circuit board 51 and fixing the flat plate portion 60 and the holder 22 with the protrusion 90 and the hole portion 91 passing through the hole portion 51h, the flexible printed circuit board 51 can be accurately positioned with respect to the holder 22.

[0045] Also, as described above, in the optical unit 10 of this embodiment, the fixing portion 70 fixes the flexible printed circuit boards 51 in a state where a plurality of them are stacked on the first surface (mounting surface 72a) as the fixing surface of the holder 22 and the second surface (contact surface 72b) intersecting the first surface. Generally, the flexible printed circuit boards 51 arranged in a plurality of stacked layers are likely to scatter when the holder 22 is swung, because they are in a bent state. However, the optical unit 10 of this embodiment has the above-described configuration, so that the flexible printed circuit boards 51 in a bent state can be fixed in a state where a plurality of flexible printed circuit boards 51 are stacked on each of the plurality of fixing surfaces (mounting surface 72a and contact surface 72b), and the scattering of the flexible printed circuit boards 51 arranged in a plurality of stacked layers can be particularly effectively suppressed. When fixing the flexible printed circuit boards 51 in a state where a plurality of them are stacked on the first surface and the second surface, a configuration may be adopted in which the flat plate portion 60 and the holder 22 are fixed by the protrusion 90 and the hole portion 91 only on the first surface (mounting surface 72a) as in the optical unit 10 of this embodiment, or the flat plate portion 60 and the holder 22 may be fixed by the protrusion 90 and the hole portion 91 also on the second surface (contact surface 72b). In the case of such a configuration, the contact surface 72b can be regarded as the first surface, and the mounting surface 72a can be regarded as the second surface.

[0046] Further, as described above, in the optical unit 10 of this embodiment, the fixing portion 70 is configured such that the flat plate portion 60 is fixed to the holder 22 by press-fitting the flat plate portion 60 into the holder 22 in both the first flat plate portion 60A and the second flat plate portion 60B. By adopting such a configuration, the flat plate portion 60 can be easily and firmly fixed to the holder 22. However, the present invention is not limited to such a configuration, and the flat plate portion 60 may not be configured to be fixed to the holder 22 by press-fitting at least one of the first flat plate portion 60A and the second flat plate portion 60B into the holder 22.

[0047] Further, like the optical unit 10 of this embodiment, the flat plate portion 60 can be configured to include a first flat plate portion 60A facing the mounting surface 72a as the first surface, and a second flat plate portion 60B which is a separate member from the first flat plate portion 60A and faces the contact surface 72b as the second surface. By adopting such a configuration, the configuration of the flat plate portion 60 can be simplified, such as making it a substantially rectangular parallelepiped flat plate, and the fixing portion 70 can be easily configured.

[0048] Further, like the optical unit 10 of this embodiment, the flat plate portion 60 can be configured to be attached to the flexible wiring board 51. By adopting such a configuration, the flexible wiring board 51 can be easily and accurately positioned and fixed to the holder 22.

[0049] [Embodiment 2] However, the present invention is not limited to the configuration such as the optical unit 10 of Embodiment 1. Hereinafter, the optical unit 10 of Embodiment 2 will be described with reference to FIGS. 8 and 9. Note that the optical unit 10 of this embodiment has the same configuration as the optical unit 10 of Embodiment 1 except for the fixing portion 70. Therefore, the optical unit 10 of this embodiment has the same features as the optical unit 10 of Embodiment 1 except for the parts described below. Also, in FIGS. 8 and 9, the constituent members corresponding to the constituent members of the optical unit 10 of Embodiment 1 are denoted by the same reference numerals.

[0050] The optical unit 10 of the present embodiment represented in FIGS. 8 and 9 has a flat plate portion 60 composed of one member. Thus, the flat plate portion 60 may be composed of one member having a first flat plate portion 60A facing the mounting surface 72a as the first surface and a second flat plate portion 60B facing the contact surface 72b as the second surface. With such a configuration, attachment (such as press-fitting) of the flat plate portion 60 to the attachment portion 72 becomes easy, and the flexible printed circuit board 51 can be easily fixed to the holder 22.

[0051] Here, in the optical unit 10 of the present embodiment, the flexible printed circuit board 51 is not attached to the flat plate portion 60, and the flexible printed circuit board 51 is fixed to the fixed surface (mounting surface 72a and contact surface 72b) by fixing the flat plate portion 60 to the fixed surface. With such a configuration, the fixed position of the flexible printed circuit board 51 with respect to the holder 22 can be easily changed.

[0052] [Example 3] Hereinafter, the optical unit 10 of Example 3 will be described with reference to FIG. 10. The optical unit 10 of the present embodiment has the same configuration as the optical units 10 of Examples 1 and 2 except for the fixing portion 70. Therefore, the optical unit 10 of the present embodiment has the same characteristics as the optical units 10 of Examples 1 and 2 except for the parts described below. Also, in FIG. 10, the constituent members corresponding to the constituent members of the optical units 10 of Examples 1 and 2 are denoted by the same reference numerals.

[0053] As shown in FIG. 10, in the optical unit 10 of the present embodiment, the fixing portion 70 includes two protrusions 90 and two holes 91 each. Thus, the fixing portion 70 can be configured to include a plurality of protrusions 90 and holes 91. With such a configuration, the flexible printed circuit board 51 can be firmly fixed to the holder 22.

[0054] [Example 4] The optical unit 10 of Example 4 will be described below with reference to FIG. 11. Note that the configuration of the optical unit 10 in this example is the same as that of the optical units 10 in Examples 1 to 3 except for the fixing portion 70. For this reason, the optical unit 10 of this example has the same features as the optical units 10 in Examples 1 to 3 except for the parts described below. Also, in FIG. 11, the constituent members corresponding to the constituent members of the optical units 10 in Examples 1 to 3 are denoted by the same reference numerals.

[0055] As shown in FIG. 11, in the optical unit 10 of this example, the protrusion 90 has a protrusion 902 protruding in a direction intersecting the insertion direction (+Z direction) with respect to the hole 91, and a plurality of grooves 901 extending in the insertion direction with respect to the hole 91. For this reason, when the protrusion 90 is inserted into the hole 51h of the flexible wiring board 51 and the hole 91 of the flat plate portion 60, the protrusion 902 shrinks, and when the protrusion 90 is completely inserted into the hole 91, the protrusion 902 protrudes. For this reason, in the optical unit 10 of this example, when the protrusion 90 is completely inserted into the hole 91, the flat plate portion 60 is difficult to come off from the attachment portion 72.

[0056] [Example 5] The optical unit 10 of Example 5 will be described below with reference to FIG. 12. Note that the configuration of the optical unit 10 in this example is the same as that of the optical units 10 in Examples 1 to 4 except for the fixing portion 70. For this reason, the optical unit 10 of this example has the same features as the optical units 10 in Examples 1 to 4 except for the parts described below. Also, in FIG. 12, the constituent members corresponding to the constituent members of the optical units 10 in Examples 1 to 4 are denoted by the same reference numerals.

[0057] As shown in FIG. 12, in the optical unit 10 of this embodiment, the protrusion 90 is formed with a protruding portion 902 that protrudes in a direction intersecting the insertion direction (+Z direction) with respect to the hole portion 91. Further, a groove 51i is formed in the hole portion 51h of the flexible printed circuit board 51, and a groove 91i is formed in the hole portion 91 of the flat plate portion 60. With the protrusion 90, the hole portion 51h, and the hole portion 91 having such a configuration, the protrusion 90 can be inserted into the hole portion 51h and the hole portion 91, and when the protrusion 90 is completely inserted into the hole portion 91, the protruding portion 902 is engaged with the hole portion 91 in the -Z direction. For this reason, when the protrusion 90 is completely inserted into the hole portion 91 in the optical unit 10 of this embodiment, the flat plate portion 60 is difficult to come off from the mounting portion 72.

[0058] [Example 6] Hereinafter, the optical unit 10 of Example 6 will be described with reference to FIG. 13. Note that the configuration of the optical unit 10 of this embodiment other than the fixing portion 70 is the same as that of the optical units 10 of Examples 1 to 5. For this reason, the optical unit 10 of this embodiment has the same characteristics as the optical units 10 of Examples 1 to 5 except for the portions described below. Also, in FIG. 13, the constituent members corresponding to the constituent members of the optical units 10 of Examples 1 to 5 are denoted by the same reference numerals.

[0059] As shown in FIG. 13, in the optical unit 10 of this embodiment, the protrusion 90 extends linearly in the X-axis direction, and a protrusion 902 that protrudes in a direction intersecting the insertion direction (+Z direction) with respect to the hole 91 is formed. Further, a substantially linear hole 51h extending in the X-axis direction is formed in the flexible printed circuit board 51, and a substantially linear hole 91 extending in the X-axis direction is formed in the flat plate portion 60. Grooves 51i are formed at both ends in the X-axis direction of the hole 51h, and grooves 91i are formed at both ends in the X-axis direction of the hole 91. Since the protrusion 90, the hole 51h, and the hole 91 are configured in this way, the protrusion 90 can be inserted into the hole 51h and the hole 91, and when the protrusion 90 is completely inserted into the hole 91, the protrusion 902 is hooked in the -Z direction with respect to the hole 91. For this reason, in the optical unit 10 of this embodiment, when the protrusion 90 is completely inserted into the hole 91, the flat plate portion 60 is difficult to come off from the mounting portion 72. Note that, for example, as in this embodiment, by making the protrusion 90, the hole 51h, and the hole 91 into shapes other than circular (for example, linear or polygonal), it is also possible to suppress displacement (rotation) of the flexible printed circuit board 51 with respect to the holder 22 around the Z-axis direction as the rotation axis.

[0060] As described above, in the optical unit 10 of Examples 4 to 6, the protrusion 90 is formed with a retaining shape that suppresses coming off from the hole 91 in a state where the protrusion 90 is fitted in the hole 91. By adopting such a configuration, it is possible to effectively suppress the flat plate portion 60 from coming off from the protrusion 90 and the flexible printed circuit board 51 from scattering. Note that the configuration of the retaining shape is not limited to the retaining configuration in the optical unit 10 of Examples 4 to 6 described above. For example, in the optical unit 10 including the protrusion 90 having a configuration such as that of Examples 1 to 3, after the protrusion 90 is completely inserted into the hole 91, the tip of the protrusion 90 may be pressed and crushed while being heated to form a retaining shape.

[0061] Note that, as described above, by making the protrusion 90 and the hole 91 into shapes other than circular (for example, linear, polygonal shapes such as triangular or quadrangular), it is also possible to suppress the displacement (rotation) of the flexible printed circuit board 51 with respect to the holder 22 around the Z-axis direction. That is, in other words, the protrusion 90 can be configured to have an anti-rotation shape that suppresses rotation with respect to the hole 91 when fitted into the hole 91. By adopting such a configuration, it is possible to suppress the rotation of the protrusion 90 with respect to the hole 91 and the resulting displacement of the flexible printed circuit board 51 with respect to the holder 22, and by accurately positioning the protrusion 90 with respect to the hole 91, the flexible printed circuit board 51 can be accurately positioned with respect to the holder 22.

[0062] The present invention is not limited to the above-described embodiments, and can be implemented in various configurations without departing from the gist thereof. 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 in order to solve some or all of the above-described problems, or to achieve some or all of the above-described effects. Also, if the technical feature is not described as essential in this specification, it can be appropriately deleted.

Explanation of Reference Numerals

[0063] 10…Optical unit, 12…Optical module, 14…Movable body, 16…Fixed body, 18…Rotary drive mechanism, 19a…First support portion, 19b…Second support portion, 20…Support mechanism, 20a…Sheet metal, 20b…Sheet metal, 21…Gimbal mechanism, 22…Holder, 24A…Magnet, 24B…Magnet, 25…Gimbal frame portion, 27a…Extension portion for the first support portion, 27b…Extension portion for the second support portion, 28…Fixed frame, 28a…Coil mounting portion, 32A…Coil, 32B…Coil, 50…Image sensor, 50a…Connection portion, 51…Flexible wiring board, 51a…Planar region, 51b…First bending portion, 51c…Second bending portion, 51d…Region, 51e…Surface, 51h…Hole portion, 51i…Groove, 52…Positioning portion, 60…Flat plate portion, 60A…First flat plate portion, 60B…Second flat plate portion, 61…End portion, 70…Fixing portion, 71…Groove portion, 71a…Inclined surface, 72…Mounting portion, 72a…Placing surface (fixing surface, first surface), 72b…Contact surface (fixing surface, second surface), 90…Projection, 91…Hole portion, 91i…Groove, 100…Movable unit, 128…Rectangular frame-shaped member, 200…Case, 228a…Wall portion, 228b…Wall portion, 228c…Wall portion, 228d…Wall portion, 510…Surface, 511…Region, 512…Region, 513…Surface, 901…Groove, 902…Protrusion, C1…Swing center (position of swing axis), L…Optical axis, M…Extension line

Claims

1. A fixed body, an optical module, a flexible printed circuit board that is arranged in a plurality of layers and has one end connected to the optical module, a holder that houses the optical module and holds the optical module and the flexible printed circuit board so as to be swingable with respect to the fixed body, a fixing portion that fixes the flexible printed circuit board to the holder, comprising: the fixing portion has a protrusion formed on a fixing surface of the holder and a flat plate portion formed with a hole that fits into the protrusion, and an optical unit characterized in that the flexible printed circuit boards are sandwiched and fixed in a state where a plurality of them are stacked between the fixing surface and the flat plate portion.

2. In the optical unit according to Claim 1, the fixing portion fixes the flexible printed circuit boards in a stacked state on a first surface as the fixing surface and a second surface that intersects the first surface. An optical unit characterized by this.

3. In the optical unit according to Claim 2, the flat plate portion is composed of one member having a first flat plate portion facing the first surface and a second flat plate portion facing the second surface. An optical unit characterized by this.

4. In the optical unit according to Claim 2, the flat plate portion has a first flat plate portion facing the first surface and a second flat plate portion that is formed of a member different from the first flat plate portion and faces the second surface. An optical unit characterized by this.

5. In the optical unit according to Claim 4, the flat plate portion is attached to the flexible printed circuit board. An optical unit characterized by this.

6. In the optical unit according to any one of Claims 1 to 4, the flexible printed circuit board is not attached to the flat plate portion, and the flexible printed circuit board is fixed to the fixing surface by fixing the flat plate portion to the fixing surface. An optical unit characterized by this.

7. In the optical unit according to any one of Claims 1 to 6, the fixing portion is configured such that the flat plate portion is fixed to the holder by press-fitting the flat plate portion into the holder. An optical unit characterized by this.

8. In the optical unit according to any one of Claims 1 to 7, the fixing portion includes a plurality of the protrusions and the holes. An optical unit characterized by this.

9. In the optical unit according to any one of Claims 1 to 8, The optical unit is characterized in that a retaining shape is formed on the protrusion to prevent the protrusion from coming out of the hole when the protrusion is fitted into the hole.

10. In the optical unit according to any one of Claims 1 to 9, the optical unit is characterized in that an anti-rotation shape is formed on the protrusion to prevent the protrusion from rotating with respect to the hole when the protrusion is fitted into the hole.

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