CN115016194A

CN115016194A - Optical unit

Info

Publication number: CN115016194A
Application number: CN202210152927.1A
Authority: CN
Inventors: 南泽伸司; 须江猛
Original assignee: Nidec Sankyo Corp
Current assignee: Nidec Instruments Corp
Priority date: 2021-02-18
Filing date: 2022-02-18
Publication date: 2022-09-06
Anticipated expiration: 2042-02-18
Also published as: CN115016194B; JP2022126221A

Abstract

A coil of a drive mechanism for rotating a movable body relative to a fixed body is accurately and simply positioned. The optical unit (1) is provided with: a movable body (14) provided with an optical module (12); a fixed body (16) that rotatably supports the movable body (14) with a direction intersecting the optical axis direction (D1) of the optical module (12) as a rotation axis; and a drive mechanism (18) for rotationally moving the movable body (14) relative to the fixed body (16), the drive mechanism (18) comprising: a magnet (24) provided on the movable body (14); a coil (32) provided on the fixed body (16); a flexible printed board (52) connected to the coil (32); and a reinforcing plate (60) to which the coil (32) and the flexible printed circuit board (52) are fixed, wherein the reinforcing plate (60) is provided with a projection (61), and the fixing body (16) is provided with a contact portion (161) that contacts the projection (61).

Description

Optical unit

Technical Field

The present invention relates to an optical unit.

Background

Conventionally, various optical units have been used, which include: a movable body having an optical module; a fixed body rotatably supporting the movable body; and a drive mechanism for rotationally moving the movable body with respect to the fixed body. For example, patent document 1 discloses an optical unit including: a movable body provided with an optical module; a fixed body rotatably supporting the movable body; and a correction drive mechanism for rotationally moving the movable body with respect to the fixed body.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2020-160373

Disclosure of Invention

Technical problem to be solved by the invention

In the conventional optical unit capable of rotating and moving the movable body including the optical module with respect to the fixed body as described above, a driving mechanism having a magnet and a coil connected to a flexible printed circuit board is generally used. However, in the optical unit having such a configuration, for example, when the coil is positioned with respect to the fixed body, the coil may be displaced from a desired position. This is because the flexible printed board to which the coil is fixed is temporarily fixed to the fixing body and then fixed by adhering the flexible printed board to the fixing body with an adhesive or the like, and therefore, the temporary fixing position of the flexible printed board to the fixing body is shifted due to a manufacturing tolerance of the flexible printed board, a shift in the adhering position, or the like, and the fixing position of the coil to the fixing body is also shifted. Further, although a UV adhesive is often used as an adhesive for temporary fixation, if a UV adhesive is used, a UV irradiation device or the like is required, which may increase the cost and complicate the manufacturing process of the optical unit. Therefore, an object of the present invention is to accurately and easily position a coil of a drive mechanism that rotationally moves a movable body with respect to a fixed body.

Technical scheme for solving technical problem

An optical unit according to the present invention includes: a movable body provided with an optical module; a fixed body that rotatably supports the movable body with a direction intersecting with an optical axis direction of the optical module as a rotation axis; and a drive mechanism that rotationally moves the movable body with respect to the fixed body, the drive mechanism including: a magnet provided on the movable body; a coil provided on the fixed body; a flexible printed substrate connected to the coil; and a reinforcing plate to which the coil and the flexible printed circuit board are fixed, wherein the reinforcing plate is provided with a convex portion, and the fixing body is provided with a contact portion that contacts the convex portion.

According to this aspect, the coil and the flexible printed circuit board are fixed to the reinforcing plate, and the reinforcing plate is fixed to the fixing body by bringing the convex portion of the reinforcing plate into contact with the contact portion of the fixing body. Therefore, the reinforcing plate is accurately and easily positioned with respect to the stator by the contact portion of the convex portion of the reinforcing plate and the stator, and thereby the coil is also accurately and easily positioned with respect to the stator.

In the optical unit of the present invention, the optical unit may be configured such that: the fixed body is provided with an abutted portion which abuts against an abutting portion provided in a region of the reinforcing plate on the side opposite to the convex portion when the convex portion is brought into contact with the contact portion. With this configuration, the coil can be positioned with particular accuracy with respect to the fixed body by the abutting portion of the reinforcing plate and the abutted portion of the fixed body, in addition to the contact portion of the convex portion of the reinforcing plate and the fixed body. Further, by bringing the abutting portion of the reinforcing plate into abutment with the abutted portion of the fixed body at a position opposite to a position at which the convex portion of the reinforcing plate contacts the contact portion of the fixed body, it is possible to suppress the convex portion of the reinforcing plate from coming off from the contact portion of the fixed body.

In the optical unit of the present invention, the optical unit may be configured such that: the contact direction of the convex portion with respect to the contact portion is the optical axis direction. In an optical unit configured to support a movable body so as to be rotatable with respect to a fixed body with a direction intersecting with an optical axis direction as a rotation axis, accuracy of a position of a coil with respect to a magnet in the optical axis direction is particularly required.

In the optical unit of the present invention, the optical unit may be configured such that: the convex portion is pressed into contact with the contact portion. With this configuration, the contact portion between the convex portion of the reinforcing plate and the fixed body can be accurately positioned and fixed easily and without causing rattling or the like.

In the optical unit of the present invention, the optical unit may be configured such that: at least one of the reinforcing plate and the flexible printed circuit board is bonded to the fixing body by an adhesive. With this configuration, the fixing body and the reinforcing plate can be firmly fixed, and the positional displacement of the reinforcing plate with respect to the fixing body and the positional displacement of the coil with respect to the fixing body can be suppressed particularly effectively.

In the optical unit of the present invention, the optical unit may be configured such that: the reinforcing plate is provided with a plurality of the projections. With this configuration, the reinforcing plate can be positioned at a plurality of positions with respect to the fixed body, the reinforcing plate can be positioned particularly accurately with respect to the fixed body, and the coil can be positioned particularly accurately with respect to the fixed body.

In addition, in the method for manufacturing an optical unit according to the present invention, the optical unit includes: a movable body provided with an optical module; a fixed body that rotatably supports the movable body with a direction intersecting with an optical axis direction of the optical module as a rotation axis; and a drive mechanism that rotationally moves the movable body with respect to the fixed body, the drive mechanism including: a magnet provided on the movable body; a coil provided on the fixed body; a flexible printed substrate connected to the coil; and a reinforcing plate to which the coil and the flexible printed circuit board are fixed, the method for manufacturing an optical unit including: a step of providing a convex portion on the reinforcing plate; fixing the coil and the flexible printed board to the reinforcing plate; a step of forming the fixed body having a contact portion capable of making the convex portion contact and an abutted portion capable of making an abutting portion provided in a region of the reinforcing plate opposite to the convex portion abut; and a step of bringing the convex portion into contact with the contact portion while bringing the abutting portion into abutment with the abutted portion.

According to this aspect, the reinforcing plate is accurately positioned with respect to the fixed body by the contact portion between the protruding portion of the reinforcing plate and the fixed body. In addition to the contact portion between the convex portion of the reinforcing plate and the fixed body, the abutting portion of the reinforcing plate and the abutted portion of the fixed body can position the reinforcing plate, particularly the coil, with respect to the fixed body particularly accurately. Further, by press-fitting the convex portion of the reinforcing plate into the contact portion of the fixed body, the contact portion of the reinforcing plate and the fixed body can be accurately positioned and fixed easily and without generating rattling or the like. Further, since it is not necessary to temporarily fix the coil to the fixing body with a UV adhesive or the like, the coil can be easily positioned with respect to the fixing body.

Effects of the invention

The optical unit of the present invention can accurately and simply position the coil of the driving mechanism which enables the movable body to rotate and move relative to the fixed body.

Drawings

Fig. 1 is a perspective view of a smartphone including an optical unit according to an embodiment of the present invention.

Fig. 2 is a top view of an optical unit according to an embodiment of the invention.

Fig. 3 is a perspective view of an optical unit according to an embodiment of the present invention.

Fig. 4 is an exploded perspective view of an optical unit according to an embodiment of the present invention.

Fig. 5 is an exploded perspective view of the optical unit of an embodiment of the present invention, viewed from a different angle than fig. 4.

Fig. 6 is a front view of an optical unit according to an embodiment of the present invention.

Fig. 7 is a side view of an optical unit of an embodiment of the present invention.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each drawing, the X axis, the Y axis, and the Z axis are orthogonal directions, respectively, and a view viewed in the + X direction and the-X direction is a side view, a view viewed in the + Y direction is a top view, a view viewed in the-Y direction is a bottom view, a view viewed in the + Z direction is a rear view, and a view viewed in the-Z direction is a front view. The + Y direction corresponds to the incident direction D1 of the light beam from the outside.

< overview of an apparatus having an optical Unit >

First, the optical unit 1 according to embodiment 1 of the present invention will be described. Fig. 1 is a schematic perspective view of a smartphone 100 as an example of a device including an optical unit 1 according to the present embodiment. The optical unit 1 of the present embodiment can be ideally used in the smartphone 100. This is because the optical unit 1 of the present embodiment can be formed to be thin, and the thickness of the smartphone 100 in the Y-axis direction can be formed to be thin. However, the optical unit 1 of the present embodiment is not limited to the smartphone 100, and may be used in various devices such as a camera and a video camera, which are not particularly limited.

As shown in fig. 1, the smartphone 100 has a glass cover 101 on which a light beam is incident. The optical unit 1 is provided inside the glass cover 101 of the smartphone 100. The smartphone 100 is configured to be able to receive an incident light beam from the outside in the incident direction D1 through the cover glass 101 and to capture an object image based on the incident light beam.

< overview of the overall Structure of optical Unit >

The structure of the optical unit 1 of the present embodiment will be described in brief with reference to fig. 2 to 5. The optical unit 1 includes: a movable body 14 including an optical module 12 such as a lens 12a and an imaging device 50; and a fixed body 16 that is held in a state of being displaceable in a direction (pitch direction) in which the X-axis direction serves as a rotation axis (swing axis) and in a direction (yaw direction) in which the Z-axis direction serves as a rotation axis (swing axis). Further, the apparatus comprises: a drive mechanism 18 (a drive mechanism 18A and a drive mechanism 18B) that drives the movable body 14 in the pitch direction and the yaw direction; and a support mechanism 20 that supports the movable body 14 so as to be rotatable (swingable) in the pitch direction and the yaw direction with respect to the fixed body 16.

< relating to a movable body >

As shown in fig. 4 and 5, the optical unit 1 of the present embodiment includes a movable body main portion 14A and a holder 14B as the movable body 14. The movable body main body portion 14A has the optical module 12. The holder 14B holds the movable body main body portion 14A, and is provided with a magnet 24 (a magnet 24A and a magnet 24B) constituting the drive mechanism 18. In fig. 4 and 5, the optical unit 1 is shown in a state in which the image pickup device 50 and the flexible printed board 51 connected to the image pickup device 50 are fixed to the holder 14B. However, it may be considered that the image pickup device 50 is attached to the movable body main body portion 14A, and the image pickup device 50 and the flexible printed board 51 connected to the image pickup device 50 constitute a part of the movable body main body portion 14A.

Thus, the movable body 14 includes: a movable body part 14A provided with the optical module 12 and the like; and a holder 14B provided with a magnet 24 and the like. The holding frame 14B is configured as a rectangular frame-shaped member provided so as to surround the remaining four surfaces of the optical module 12 except for a front surface (a surface on the object side) on which the lens 12a is provided and a rear surface on the opposite side. As an example, the holder 14B of the present embodiment is configured to be able to attach and detach the optical module 12. However, the optical module 12 and the holder 14B may be integrally formed. In the holder 14B, the pitch and

yaw correction magnets

24A and 24B are attached to the outer surfaces of the fixed body 16 by using two surfaces facing each other.

In addition, as shown in fig. 2 to 5, the optical unit 1 of the present embodiment has a fixing body 16. In fig. 2 to 5, the fixed body 16 has a coil 32A at a position opposed to the magnet 24A, and has a coil 32B at a position opposed to the magnet 24B. In fig. 4 and 5, the coil 32A and the coil 32B are shown at positions separated from the fixed body 16, but the coil 32A is disposed at the coil disposition position 16f (see fig. 5) of the fixed body 16, and the coil 32B is disposed at the coil disposition position 16g (see fig. 5) of the fixed body 16. However, details of the positioning of the coil 32 (the coil 32A and the coil 32B) with respect to the fixed body 16 will be described later. In the present embodiment, both the coil 32A and the coil 32B of the coil 32 are configured as wound coils, for example, but the coil 32 may be provided as a pattern substrate (coil substrate) within the substrate wiring.

< optical Module >

The optical module 12 of the present embodiment can be used for a smartphone 100 as well as a thin camera mounted in a mobile phone with a camera, a tablet PC, or the like, for example. The optical module 12 includes a lens 12a on the object side, and incorporates an optical device for imaging, and the like.

Here, the optical unit 1 of the present embodiment incorporates, as an example, a drive mechanism 18, and the drive mechanism 18 corrects pitching vibration (vibration in a rotational direction with the X-axis direction as a rotational axis) and yawing vibration (vibration in a rotational direction with the Z-axis direction as a rotational axis) generated in the optical module 12, and the optical unit 1 is configured to be able to correct the pitching vibration and the yawing vibration. In the present embodiment, the optical module 12 is configured to be able to correct pitch shake and yaw shake, but may be configured to be able to further correct shake in the roll direction (shake in the rotational direction with the Y-axis direction as the rotational axis). The imaging device 50 may be regarded as constituting a part of the optical module 12.

< Driving mechanism >

In the present embodiment, in a state where the movable body 14 is disposed in the fixed body 16, as shown in fig. 4 and 5, the magnet 24A and the coil 32A, and the magnet 24B and the coil 32B are opposed to each other. In addition, 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 drive mechanism 18, respectively. The pitch and yaw of the movable body 14 are corrected by the drive mechanism 18.

The pitch and yaw are corrected as follows. When the optical unit 1 generates a shake in both or either one of the pitch direction and the yaw direction, the shake is detected by the magnetic sensors (hall element 33A and hall element 33B: see fig. 4 and 5), and the driving mechanism 18 is driven based on the detection result. Alternatively, the shake of the optical unit 1 may be detected using a shake detection sensor (gyroscope) or the like. The drive mechanism 18 functions to correct the shake based on the detection result of the shake. That is, current flows through each coil 32 to move the movable body 14 in a direction to cancel out the shake of the optical unit 1, thereby correcting the shake. The hall elements 33 (hall element 33A and hall element 33B) can also be regarded as components of the drive mechanism 18.

As described above, the optical unit 1 of the present embodiment includes the driving mechanism 18, and the driving mechanism 18 rotates the movable body 14 with respect to the fixed body 16 about the pitch axis direction and the yaw axis direction as the rotation axes. Here, the drive mechanism 18 is preferably disposed at a position other than the side on which the flexible printed circuit board 51 is disposed (+ Z direction side) in the X axis direction with respect to the movable body 14. Since the drive mechanism 18 can be disposed on the side where the flexible printed circuit board 51 is not formed, it is not necessary to enlarge the optical unit 1 in order to suppress contact between the drive mechanism 18 and the flexible printed circuit board 51, and the optical unit 1 can be downsized. In addition, "rotation" in this specification means that rotation by 360 ° is not required, and includes a case of swinging in the rotation direction.

Here, the coil 32A and the coil 32B are connected and fixed to the flexible printed circuit board 52, and details will be described later. A reinforcing plate 60 is attached to the flexible printed circuit board 52. In the optical unit 1 of the present embodiment, the reinforcing plate 60 is fixed to the fixing body 16, and thereby the flexible printed board 52 and the

coils

32A and 32B fixed thereto are fixed to the fixing body 16.

< support mechanism >

The support mechanism 20 of the present embodiment is a gimbal mechanism having both elasticity and formed by bending a flat plate material made of metal. Specifically, as shown in fig. 4 and 5, the support mechanism 20 includes, as an example, a gimbal frame 23 provided on the subject side, and a first leg 21 and a second leg 22 formed by bending 90 ° in the optical axis direction from four corners of the gimbal frame 23. The first leg 21 and the second leg 22 do not necessarily have to be all plate-shaped, and may be formed only partially in a plate shape to exhibit elasticity. One of the first leg portion 21 and the second leg portion 22 may have a shape other than a plate shape (for example, a rod shape). Further, although the support mechanism 20 of the present embodiment is configured to support the movable body 14 so as to be rotatable with respect to the fixed body 16 with both the pitch direction and the yaw direction as the directions of the rotation axes, the support mechanism may be configured to support the movable body 14 so as to be rotatable with respect to the fixed body 16 with only either the pitch direction or the yaw direction as the direction of the rotation axis.

In the support mechanism 20 of the present embodiment, the first leg 21 is provided with a concave curved surface 21a recessed inward, and the second leg 22 is provided with a concave curved surface 22a recessed inward. The first leg 21 is configured to apply a force so that the concave curved surface 21a expands outward, and the second leg 22 is configured to apply a force so that the concave curved surface 22a expands outward.

As shown in fig. 4 and 5, a fixed body side support 41 is provided at a position facing the concave curved surface 21a of the fixed body 16, and a spherical convex curved surface 41a that protrudes inward and fits into the concave curved surface 21a is attached to the fixed body side support 41. As shown in fig. 4 and 5, a movable body side support 42 is provided at a position facing the concave curved surface 22a of the holder 14B, and a spherical convex curved surface 42a that protrudes inward and fits into the concave curved surface 22a is attached to the movable body side support 42. The fixed body-side support 41 is attached to the fixed body 16 at the attachment position 16e, and the movable body-side support 42 is attached to the holder 14B at the attachment position 14 a.

Here, in the optical unit 1 of the present embodiment, the convex curved surface 41a is disposed inside the concave curved surface 21a, and the concave curved surface 21a is pressed against the convex curved surface 41a, whereby the support mechanism 20 is supported so as to be rotatable with respect to the fixed body 16 about the first axis L1 (see fig. 2) as a rotation axis. In the optical unit 1 of the present embodiment, the convex curved surface 42a is disposed in the concave curved surface 22a, and the concave curved surface 22a is pressed against the convex curved surface 42a, whereby the movable body 14 is supported so as to be rotatable with respect to the support mechanism 20 about the second axis line L2 (see fig. 2) as a rotation axis. That is, the support mechanism 20 of the present embodiment is configured such that: by supporting the support mechanism 20 so as to be rotatable with respect to the fixed body 16 about the first axis L1 as a rotation axis and supporting the movable body 14 so as to be rotatable with respect to the support mechanism 20 about the second axis L2 as a rotation axis, the movable body 14 is supported so as to be rotatable with respect to the fixed body 16 about all directions intersecting the optical axis direction (Y-axis direction) as the rotation axis. The optical unit 1 of the present embodiment is configured to: by driving the driving mechanism 18, the movable body 14 can be rotated with respect to the fixed body 16 about the pitch direction and the yaw direction as rotation axes.

< positioning Structure of coil >

Hereinafter, the positioning structure of the coil 32 will be described in detail with reference to fig. 6 and 7 in addition to fig. 2 to 5. As described above, in the optical unit 1 of the present embodiment, both the coil 32A and the coil 32B are connected and fixed to the flexible printed board 52, and the reinforcing plate 60 is attached to the flexible printed board 52. That is, the flexible printed circuit board 52 and the reinforcing plate 60 can be regarded as components of the drive mechanism 18. Here, the reinforcing plate 60 is made of polyimide having high rigidity. Therefore, by accurately positioning and fixing the reinforcing plate 60 with respect to the fixing body 16, the flexible printed circuit board 52 and the coil 32 can be accurately positioned and fixed. However, the material of the reinforcing plate 60 is not particularly limited.

To summarize here, as described above, the optical unit 1 of the present embodiment includes: a movable body 14 having an optical module 12; a fixed body 16 rotatably supporting the movable body 14 by the support mechanism 20 with a direction intersecting the optical axis direction (incident direction D1) of the optical module 12 as a rotation axis; and a drive mechanism 18 that rotationally moves the movable body 14 with respect to the fixed body 16. The drive mechanism 18 includes: a magnet 24 provided on the movable body 14; a coil 32 provided on the fixed body 16; a flexible printed board 52 connected to the coil 32; and a reinforcing plate 60 that fixes the coil 32 and the flexible printed substrate 52.

Here, as shown in fig. 6, 7, and the like, the reinforcing plate 60 is provided with a convex portion 61, and the fixed body 16 is provided with a contact portion 161 that contacts the convex portion 61. Specifically, the optical unit 1 of the present embodiment includes, as the reinforcing plate 60, two reinforcing plates of a reinforcing plate 60A provided at a position facing the coil 32A and a reinforcing plate 60B provided at a position facing the coil 32B, and two convex portions 61 protruding in the + Y direction are formed on either the reinforcing plate 60A or the reinforcing plate 60B. As shown in fig. 6, the two convex portions 61 of the reinforcing plate 60A contact the contact portions 161B, and as shown in fig. 7, the two convex portions 61 of the reinforcing plate 60B contact the contact portions 161 d.

In this way, in the optical unit 1 of the present embodiment, the coil 32 and the flexible printed board 52 are fixed to the reinforcing plate 60, and the reinforcing plate 60 is fixed to the fixing body 16 by bringing the convex portion 61 of the reinforcing plate 60 into contact with the contact portion 161 of the fixing body 16. Therefore, in the optical unit 1 of the present embodiment, the reinforcing plate 60 is accurately and simply positioned with respect to the fixed body 16 by the convex portion 61 of the reinforcing plate 60 and the contact portion 161 of the fixed body 16, and thereby the coil 32 is also accurately and simply positioned with respect to the fixed body 16.

In the optical unit 1 of the present embodiment, as shown in fig. 6, the fixed body 16 is provided with an abutted portion 162 (abutted portion 162a), and the abutted portion 162 abuts against the abutting portion 62 provided in the region of the reinforcing plate 60 on the side opposite to the convex portion 61 when the convex portion 61 contacts the contact portion 161 b. As shown in fig. 7, the fixed body 16 is provided with an abutted portion 162 (abutted portion 162c), and the abutted portion 162 abuts against the abutting portion 62 provided in the region of the reinforcing plate 60 on the opposite side of the convex portion 61 when the convex portion 61 contacts the contact portion 161 d.

By adopting such a configuration, the optical unit 1 of the present embodiment can accurately position the coil 32 with respect to the fixed body 16, particularly, by the abutting portion 62 of the reinforcing plate 60 and the abutted portion 162 of the fixed body 16, in addition to the convex portion 61 of the reinforcing plate 60 and the contact portion 161 of the fixed body 16. Further, the abutting portion 62 of the reinforcing plate 60 abuts against the abutted portion 162 of the fixed body 16 at a position (position on the-Y direction side of the reinforcing plate 60) opposite to a position (position on the + Y direction side of the reinforcing plate 60) where the convex portion 61 of the reinforcing plate 60 contacts with the contact portion 161 of the fixed body 16, whereby the reinforcing plate 60 can be prevented from being displaced to the-Y direction side with respect to the fixed body 16, and the convex portion 61 of the reinforcing plate 60 can be prevented from being separated from the contact portion 161 of the fixed body 16.

In the optical unit 1 of the present embodiment, both the contact portion 161 and the abutted portion 162 of the fixed body 16 have a rib shape protruding outward. The reinforcing plate 60 to which the coil 32 and the flexible printed circuit board 52 are fixed is inserted from the outside between the contact portion 161 and the contacted portion 162 of the fixed body 16, thereby positioning the reinforcing plate 60 with respect to the fixed body 16. However, the present invention is not limited to such a structure.

In the optical unit 1 of the present embodiment, the contact direction of the convex portion 61 with respect to the contact portion 161 is the optical axis direction (Y-axis direction). As in the optical unit 1 of the present embodiment, in the optical unit configured to support the movable body 14 so as to be rotatable with respect to the fixed body 16 with the direction intersecting the optical axis direction as the rotation axis, accuracy of the position of the coil 32 with respect to the magnet 24 in the optical axis direction is particularly required. Therefore, the optical unit 1 of the present embodiment is configured such that the position of the coil 32 with respect to the magnet 24 is particularly accurately positioned in the optical axis direction. However, the configuration is not limited to this, and the contact direction of the convex portion 61 with respect to the contact portion 161 may be a direction intersecting the optical axis direction.

Here, in the optical unit 1 of the present embodiment, the convex portion 61 and the contact portion 161 are configured such that: when the reinforcing plate 60 is inserted from the outside into the region between the contact portion 161 and the abutted portion 162 of the fixed body 16, the convex portion 61 is press-fitted and contacts the contact portion 161. By adopting such a configuration, the optical unit 1 of the present embodiment can accurately position and fix the convex portion 61 of the reinforcing plate 60 and the contact portion 161 of the fixing body 16 in a simple manner without causing rattling or the like.

At least one of the reinforcing plate 60 and the flexible printed circuit board 52 may be bonded to the fixed body 16 with an adhesive as a main fixation, for example, instead of the temporary fixation. By bonding at least one of the reinforcing plate 60 and the flexible printed circuit board 52 to the fixed body 16 with an adhesive, the fixed body 16 and the reinforcing plate 60 can be firmly fixed, and the positional displacement of the reinforcing plate 60 with respect to the fixed body 16 can be particularly effectively suppressed. Therefore, the positional displacement of the coil 32 with respect to the fixed body 16 can be suppressed particularly effectively. Here, the adhesive used is not particularly limited.

As shown in fig. 6 and 7, in the optical unit 1 of the present embodiment, two convex portions 61 are provided on each of the reinforcing plate 60A and the reinforcing plate 60B. In this way, the reinforcing plate 60 is preferably provided with a plurality of projections 61. This is because, with such a configuration, the reinforcing plate 60 can be positioned at a plurality of locations with respect to the fixed body 16, the reinforcing plate 60 can be positioned particularly accurately with respect to the fixed body 16, and the coil 32 can be positioned particularly accurately with respect to the fixed body 16.

The method for manufacturing the optical unit 1 of the present embodiment will be described below. In the method of manufacturing the optical unit 1 of the present embodiment, the step of providing the convex portion 61 on the reinforcing plate 60 is performed. This step corresponds to a step of manufacturing the reinforcing plate 60 having the convex portion 61 formed thereon. Next, a step of fixing the coil 32 and the flexible printed board 52 to the reinforcing plate 60 is performed. Next, a step of forming a fixed body 16 having a contact portion 161 capable of making the convex portion 61 contact and an abutted portion 162 capable of making an abutting portion 62 provided in a region of the reinforcing plate 60 on the opposite side of the convex portion 61 abut is performed. Then, a step of bringing the contact portion 62 into contact with the contacted portion 162 and bringing the convex portion 61 of the reinforcing plate 60 into contact with the contact portion 161 is performed.

By performing the manufacturing method of the optical unit 1 of the present embodiment, the reinforcing plate 60 is accurately positioned with respect to the fixed body 16 by the convex portion 61 of the reinforcing plate 60 and the contact portion 161 of the fixed body 16. Further, in addition to the contact portion 161 of the convex portion 61 of the reinforcing plate 60 and the fixed body 16, the abutting portion 62 of the reinforcing plate 60 and the abutted portion 162 of the fixed body 16 can particularly accurately position the reinforcing plate 60 with respect to the fixed body 16, and particularly accurately position the coil 32 with respect to the fixed body 16. Further, by press-fitting the convex portion 61 of the reinforcing plate 60 into the contact portion 161 of the fixed body 16, the convex portion 61 of the reinforcing plate 60 and the contact portion 161 of the fixed body 16 can be accurately positioned and fixed easily and without rattling or the like. Further, since it is not necessary to temporarily fix the coil 32 to the fixing body 16 with a UV adhesive or the like, the coil can be easily positioned with respect to the fixing body 16. However, for example, the step of bonding at least one of the reinforcing plate 60 and the flexible printed circuit board 52 to the fixing body 16 with an adhesive may be further performed as a main fixing instead of the temporary fixing.

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, in order to solve part or all of the above-described technical problems or to achieve part or all of the above-described effects, technical features in embodiments corresponding to technical features in the respective aspects described in the summary of the invention may be appropriately replaced or combined. In addition, as long as the technical features are not described as essential features in the present specification, the technical features may be appropriately deleted.

Reference numerals

1 an optical unit; 12 an optical module; 12a lens; 14a movable body; a 14A movable body main body portion; a 14B cage; 14a mounting position; 16 a fixed body; 16e mounting position; 16f coil arrangement position; 16g coil arrangement position; 18a drive mechanism; an 18A drive mechanism; an 18B drive mechanism; 20 a support mechanism; 21a first leg portion; 21a concave curved surface; 22a second leg portion; 22a concave curved surface; 23 a gimbal frame portion; 24 magnets (drive mechanism); a 24A magnet; a 24B magnet; 32 coils (drive mechanism); a 32A coil; a 32B coil; 33 hall element (drive mechanism); a 33A Hall element; a 33B Hall element; 41a fixed body side support; 41a convex curved surface; 42a movable body side support portion; 42a convex curved surface; 50 image pickup elements; 51 a flexible printed substrate; 52 a flexible printed board (drive mechanism); 60 reinforcing plates (drive mechanisms); a 60A stiffener plate; a 60B stiffener plate; 61 convex parts; 62 an abutment portion; 100 a smart phone; 101 a glass cover; 161 contact part; 161b contact portion; 161d contact portion; 162 abutted portion; 162a abutted portion; 162c are abutted; d1 incident direction (optical axis direction); an L1 first axis; l2 second axis.

Claims

1. An optical unit is characterized by comprising:

a movable body provided with an optical module;

a fixed body that rotatably supports the movable body with a direction intersecting with an optical axis direction of the optical module as a rotation axis; and

a drive mechanism that rotationally moves the movable body with respect to the fixed body,

the drive mechanism includes: a magnet provided on the movable body; a coil provided on the fixed body; a flexible printed substrate connected to the coil; and a reinforcing plate to which the coil and the flexible printed circuit board are fixed,

the reinforcing plate is provided with a convex portion, and the fixing body is provided with a contact portion that contacts the convex portion.

2. An optical unit according to claim 1,

the fixed body is provided with an abutted portion which abuts against an abutting portion provided in a region of the reinforcing plate on the side opposite to the convex portion when the convex portion is brought into contact with the contact portion.

3. An optical unit according to claim 1 or 2,

the contact direction of the convex portion with respect to the contact portion is the optical axis direction.

4. An optical unit according to any one of claims 1 to 3,

the convex portion is pressed into contact with the contact portion.

5. An optical unit according to any one of claims 1 to 4,

at least one of the reinforcing plate and the flexible printed circuit board is bonded to the fixed body with an adhesive.

6. An optical unit according to any one of claims 1 to 5,

the reinforcing plate is provided with a plurality of the projections.

7. A method of manufacturing an optical unit is provided,

the optical unit includes: a movable body provided with an optical module; a fixed body that rotatably supports the movable body with a direction intersecting with an optical axis direction of the optical module as a rotation axis; and a drive mechanism for rotationally moving the movable body relative to the fixed body,

it is characterized by comprising:

a step of providing a convex portion on the reinforcing plate;

fixing the coil and the flexible printed board to the reinforcing plate;

a step of forming the fixed body having a contact portion capable of making the convex portion contact and an abutted portion capable of making an abutting portion provided in a region of the reinforcing plate opposite to the convex portion abut; and

and a step of bringing the convex portion into contact with the contact portion while bringing the abutting portion into abutment with the abutted portion.