CN115016194B

CN115016194B - Optical unit

Info

Publication number: CN115016194B
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: 2023-12-19
Anticipated expiration: 2042-02-18
Also published as: CN115016194A; JP2022126221A

Abstract

The coil of the driving mechanism for rotating and moving the movable body relative to the 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) which rotatably supports the movable body (14) with a direction intersecting with 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), wherein the drive mechanism (18) comprises: a magnet (24) provided to the movable body (14); a coil (32) provided to 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 board (52) are fixed, wherein the reinforcing plate (60) is provided with a convex portion (61), and the fixing body (16) is provided with a contact portion (161) that contacts the convex portion (61).

Description

Optical unit

Technical Field

The present invention relates to an optical unit.

Background

Conventionally, various optical units are used, and the optical units include: a movable body having an optical module; a fixed body rotatably supporting the movable body; and a driving mechanism for rotationally moving the movable body relative 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 driving mechanism for rotationally moving the movable body relative to the fixed body.

Prior art literature

Patent literature

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 rotationally moving the movable body including the optical module relative to the fixed body as described above, a driving mechanism including a magnet and a coil connected to the flexible printed board is generally used. However, in the optical unit having such a structure, for example, when the coil is positioned with respect to the fixed body, the coil may be shifted from a desired position. This is because the coil is temporarily fixed to the fixed body by adhering the flexible printed board to which the coil is fixed to the fixed body with an adhesive or the like, and therefore, the temporary fixing position of the flexible printed board to the fixed body is shifted due to manufacturing tolerance of the flexible printed board, shift of the adhering position, and the like, and the fixing position of the coil to the fixed body is also shifted. In addition, UV adhesives are often used as adhesives for temporary fixation, but if UV adhesives are used, UV irradiation equipment and the like are required, and in addition to the high cost, there are cases where the manufacturing process of the optical unit is complicated. Accordingly, an object of the present invention is to accurately and simply position a coil of a driving mechanism that rotationally moves a movable body with respect to a fixed body.

Technical proposal adopted for solving the technical problems

The optical unit of the present invention is characterized by comprising: a movable body provided with an optical module; a fixed body rotatably supporting the movable body with a direction intersecting an optical axis direction of the optical module as a rotation axis; and a driving mechanism that rotationally moves the movable body with respect to the fixed body, the driving mechanism having: a magnet provided to the movable body; a coil provided in the fixed body; a flexible printed board connected to the coil; and a reinforcing plate to which the coil and the flexible printed 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 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 simply positioned with respect to the fixed body by the contact portion of the convex portion of the reinforcing plate with the fixed body, whereby the coil is also accurately and simply positioned with respect to the fixed body.

In the optical unit of the present invention, the optical unit may be configured to: the fixed body is provided with an abutted portion which is abutted with an abutting portion provided in a region of the reinforcing plate opposite to the convex portion when the convex portion is in contact with the contact portion. By adopting such a configuration, the coil can be positioned particularly accurately 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, the abutting portion of the reinforcing plate is abutted against the abutted portion of the fixed body at a position opposite to the position where the protruding portion of the reinforcing plate is in contact with the contact portion of the fixed body, whereby the protruding portion of the reinforcing plate can be prevented from being separated from the contact portion of the fixed body.

In the optical unit of the present invention, the optical unit may be configured to: the contact direction of the convex portion with respect to the contact portion is the optical axis direction. In an optical unit having a structure in which a movable body is supported rotatably with respect to a fixed body with a direction intersecting an optical axis direction as a rotation axis, accuracy in the position of a coil with respect to a magnet in the optical axis direction is particularly required, but by adopting such a structure, the position of the coil with respect to the magnet in the optical axis direction can be particularly accurately positioned.

In the optical unit of the present invention, the optical unit may be configured to: the convex portion and the contact portion are pressed into contact with each other. By adopting such a structure, the contact portion between the convex portion of the reinforcing plate and the fixing body can be positioned and fixed easily and accurately without occurrence of rattling or the like.

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

In the optical unit of the present invention, the optical unit may be configured to: the reinforcing plate is provided with a plurality of the convex portions. With this configuration, the reinforcing plate can be positioned with respect to the fixed body at a plurality of positions, the reinforcing plate can be positioned with respect to the fixed body with particular accuracy, and the coil can be positioned with particular accuracy 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 rotatably supporting the movable body with a direction intersecting an optical axis direction of the optical module as a rotation axis; and a driving mechanism that rotationally moves the movable body with respect to the fixed body, the driving mechanism having: a magnet provided to the movable body; a coil provided in the fixed body; a flexible printed board connected to the coil; and a reinforcing plate to which the coil and the flexible printed board are fixed, wherein the method for manufacturing the optical unit is characterized by comprising: a step of providing a convex portion on the reinforcing plate; a step of fixing the coil and the flexible printed board to the reinforcing plate; a step of forming the fixing body having a contact portion capable of bringing the convex portion into contact with each other and an abutted portion capable of abutting against an abutting portion provided in a region of the reinforcing plate opposite to the convex portion; and a step of bringing the convex portion into contact with the contact portion while bringing the contact portion into contact with the contacted portion.

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

Effects of the invention

The optical unit of the present invention can accurately and simply position the coil of the driving mechanism for rotating and moving the movable body relative to the fixed body.

Drawings

Fig. 1 is a perspective view of a smart phone provided with 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 present 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 an 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 according to an embodiment of the invention.

Detailed Description

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

< outline of device having optical Unit >

First, an 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 provided with an optical unit 1 of the present embodiment. The optical unit 1 of the present embodiment can be desirably used in the smartphone 100. This is because the optical unit 1 of the present embodiment can be configured to be thin, and the thickness of the smartphone 100 in the Y-axis direction can be configured 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, a smartphone 100 has a glass cover 101 into which a light beam is incident. The optical unit 1 is provided inside the glass cover 101 of the smart phone 100. The smartphone 100 is configured to be able to take an object image based on an incident light beam, which is incident in the incident direction D1 from the outside via the glass cover 101.

< overview of the overall Structure of optical Unit >

The outline of the structure of the optical unit 1 of the present embodiment will be described 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 element 50; and a fixed body 16 that is held in a state that it can be displaced in a direction (pitch direction) with the X-axis direction as a rotation axis (yaw axis) and in a direction (yaw direction) with the Z-axis direction as a rotation axis (yaw axis). The present invention further includes: a driving mechanism 18 (driving mechanism 18A and driving 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.

< concerning the movable body >

As shown in fig. 4 and 5, the optical unit 1 of the present embodiment includes a movable body main body 14A and a holder 14B as the movable body 14. The movable body main body 14A has an optical module 12. The holder 14B holds the movable body main body 14A, and is provided with magnets 24 (a magnet 24A and a magnet 24B) constituting the driving 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 is also possible to consider that the image pickup device 50 is mounted on the movable body main body 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 14A.

Thus, the movable body 14 includes: a movable body main body 14A provided with an optical module 12 and the like; and a holder 14B provided with a magnet 24 or the like. The holder 14B is configured as a rectangular frame-like member provided so as to surround the remaining four surfaces of the optical module 12 except for the front surface (surface on the object side) where the lens 12a is provided and the rear surface on the opposite side. As an example, the holder 14B of the present embodiment is configured to be detachable from the optical module 12. However, the optical module 12 and the holder 14B may be integrally formed. The holder 14B has a magnet 24A and a magnet 24B for correcting pitch and yaw attached to the outer surfaces thereof by two surfaces facing the fixed body 16.

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 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 apart from the fixed body 16, but the coil 32A is disposed at a coil disposition position 16f (see fig. 5) of the fixed body 16, and the coil 32B is disposed at a coil disposition position 16g (see fig. 5) of the fixed body 16. However, details of the positioning of the coils 32 (the coil 32A and the coil 32B) with respect to the fixed body 16 will be described later. In the present embodiment, the coil 32A and the coil 32B of the coil 32 are each configured as a wound coil, but the coil 32 may be a pattern substrate (coil substrate) in which the coil 32 is provided as a pattern in the substrate wiring.

< about optical Module >

The optical module 12 of the present embodiment can be used for, for example, a camera-equipped mobile phone other than a smart phone, a thin camera mounted in a tablet PC, or the like, in addition to the smart phone 100. The optical module 12 includes a lens 12a on the object side, and incorporates an optical device or the like for imaging.

Here, the optical unit 1 of the present embodiment has a drive mechanism 18 incorporated therein as an example, and the drive mechanism 18 corrects pitch shake (shake in a rotational direction about an X-axis direction as a rotational axis) and yaw shake (shake in a rotational direction about a Z-axis direction as a rotational axis) generated by the optical module 12, and the optical unit 1 is configured to be able to correct pitch shake and yaw shake. 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 rolling direction (shake in the rotational direction about the Y-axis direction as the rotation axis). The image pickup device 50 may be regarded as a part of the optical module 12.

< concerning the drive mechanism >

In the present embodiment, in a state in which 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 respectively in a facing state. 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 driving mechanism 18, respectively. The drive mechanism 18 corrects the pitch and yaw of the movable body 14.

In addition, correction of pitch and yaw is performed as follows. When the optical unit 1 generates shake in both or either of the pitch direction and the yaw direction, the shake is detected by the magnetic sensor (hall element 33A and hall element 33B: see fig. 4 and 5), and the driving mechanism 18 is driven based on the result. Alternatively, a shake detection sensor (gyroscope) or the like may be used to detect shake of the optical unit 1. Based on the detection result of the shake, the driving mechanism 18 functions to correct the shake. That is, a current is applied to 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 element 33 (hall element 33A and hall element 33B) can also be regarded as a component of the driving 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 and the yaw axis as rotation axes. Here, the driving mechanism 18 is preferably disposed at a position other than the side (the +z direction side) of the movable body 14 where the flexible printed board 51 is disposed in the X axis direction. Since the driving mechanism 18 can be disposed on the side where the flexible printed board 51 is not formed, it is not necessary to enlarge the optical unit 1 in order to suppress contact between the driving mechanism 18 and the flexible printed board 51, and the optical unit 1 can be miniaturized. In addition, "rotation" in the present specification means not rotation of 360 °, but includes a case of swinging in a rotation direction.

The coil 32A and the coil 32B are connected and fixed to the flexible printed board 52, which will be described in detail later. A reinforcing plate 60 is attached to the flexible printed board 52. In the optical unit 1 of the present embodiment, the flexible printed substrate 52 and the coils 32A and 32B fixed thereto are fixed to the fixed body 16 by fixing the reinforcing plate 60 to the fixed body 16.

< about the supporting mechanism >

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

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

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

Here, in the optical unit 1 of the present embodiment, the convex curved surface 41a is disposed in the concave curved surface 21a, and the concave curved surface 21a is pressed against the convex curved surface 41a, so that the support mechanism 20 is supported rotatably 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, so that the movable body 14 is supported rotatably with respect to the support mechanism 20 about the second axis L2 (see fig. 2) as a rotation axis. That is, the support mechanism 20 of the present embodiment is configured as: the support mechanism 20 is rotatably supported with respect to the fixed body 16 about the first axis L1 and the movable body 14 is rotatably supported with respect to the support mechanism 20 about the second axis L2, so that the movable body 14 is rotatably supported with respect to the fixed body 16 about all of the directions intersecting the optical axis direction (Y-axis direction) as rotation axes. 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 with the pitch direction and the yaw direction as rotation axes.

< positioning Structure for 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 board 52 and the reinforcing plate 60 can also be regarded as constituent members of the driving mechanism 18. Here, the reinforcing plate 60 is formed 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 substrate 52 and the coil 32 can be accurately positioned and fixed. However, the material of the reinforcing plate 60 is not particularly limited.

As described above, the optical unit 1 of the present embodiment includes: a movable body 14 having an optical module 12; the movable body 14 is supported by the support mechanism 20 so as to be rotatable with respect to a direction intersecting the optical axis direction (incidence direction D1) of the optical module 12 as a rotation axis; and a driving mechanism 18 for rotationally moving the movable body 14 relative to the fixed body 16. The driving 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 fixing 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, namely, a reinforcing plate 60A provided at a position opposed to the coil 32A and a reinforcing plate 60B provided at a position opposed to the coil 32B, and two protrusions 61 protruding toward 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 are in contact with the contact portions 161B, and as shown in fig. 7, the two convex portions 61 of the reinforcing plate 60B are in contact with 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 fixed body 16 by bringing the convex portion 61 of the reinforcing plate 60 into contact with the contact portion 161 of the fixed body 16. Therefore, in the optical unit 1 of the present embodiment, the boss 61 of the reinforcing plate 60 and the contact portion 161 of the fixed body 16 are accurately and simply positioned with respect to 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, an abutted portion 162 (abutted portion 162 a) is provided on the fixed body 16, and the abutted portion 162 abuts against an abutting portion 62 provided in a region of the reinforcing plate 60 opposite to the protruding portion 61 when the protruding 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 162 c), and the abutted portion 162 is abutted against the abutting portion 62 provided in the region of the reinforcing plate 60 opposite to the convex portion 61 when the convex portion 61 is in contact with the contact portion 161 d.

By adopting such a structure, the optical unit 1 of the present embodiment can particularly accurately position the coil 32 with respect to the fixed body 16 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, at a position (a position on the-Y direction side of the reinforcing plate 60) opposite to a position (a position on the +y direction side of the reinforcing plate 60) where the convex portion 61 of the reinforcing plate 60 contacts the contact portion 161 of the fixed body 16, the abutting portion 62 of the reinforcing plate 60 abuts the abutted portion 162 of the fixed body 16, whereby the reinforcing plate 60 can be prevented from being displaced toward 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, the contact portion 161 and the abutted portion 162 of the fixed body 16 each 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 between the contact portion 161 and the abutted portion 162 of the fixed body 16 from the outside, whereby the reinforcing plate 60 is positioned 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 an optical unit in which the movable body 14 is supported so as to be rotatable with respect to the fixed body 16 about a direction intersecting the optical axis direction as a rotation axis, accuracy in 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 to position the position of the coil 32 with respect to the magnet 24 particularly accurately in the optical axis direction. However, the contact direction of the convex portion 61 with respect to the contact portion 161 is not limited to this configuration, and 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 as: 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 pressed into contact with 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 simply and without occurrence of rattling or the like.

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

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

Hereinafter, a method of manufacturing the optical unit 1 of the present embodiment will be described. In the method of manufacturing the optical unit 1 of the present embodiment, a process of providing the convex portion 61 on the reinforcing plate 60 is performed. The present 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 the fixed body 16 is performed, and the fixed body 16 has a contact portion 161 capable of bringing the convex portion 61 into contact with a portion to be abutted 162 capable of abutting the abutting portion 62 provided in the region of the reinforcing plate 60 opposite to the convex portion 61. Then, a step of bringing the abutting portion 62 into contact with the abutted 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 boss 61 of the reinforcing plate 60 and the contact portion 161 of the fixed body 16 are utilized to accurately position the reinforcing plate 60 with respect to the fixed body 16. In addition to the contact portion 161 between 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 position the reinforcing plate 60 with respect to the fixed body 16, and particularly position the coil 32 with respect to the fixed body 16. Further, by pressing the convex portion 61 of the reinforcing plate 60 into the contact portion 161 of the fixed body 16, the contact portion 161 between the convex portion 61 of the reinforcing plate 60 and the fixed body 16 can be positioned and fixed easily and accurately without occurrence of rattling or the like. Further, since temporary fixation with a UV adhesive or the like is not required, the coil 32 can be easily positioned with respect to the fixed body 16. However, for example, the step of bonding at least one of the reinforcing plate 60 and the flexible printed board 52 to the fixed body 16 with an adhesive may be further performed as a main fixing instead of temporary fixing.

The present invention is not limited to the above-described embodiments, and can be implemented in various configurations within a range not departing from the gist thereof. For example, in order to solve some or all of the above-described technical problems, or in order to achieve some or all of the above-described effects, technical features in the embodiments corresponding to the technical features in the respective aspects described in the summary of the invention section may be replaced or combined as appropriate. In addition, as long as the technical feature is not described as an essential feature in the present specification, it may be appropriately deleted.

Reference numerals

1 an optical unit; an optical module 12; a 12a lens; 14a movable body; 14A movable body main body; 14B holders; 14a mounting position; 16 fixing bodies; 16e mounting position; 16f coil arrangement position; 16g coil arrangement position; 18a drive mechanism; 18A drive mechanism; 18B drive mechanism; 20 a supporting mechanism; 21a first leg; 21a concave curved surface; a second leg 22; 22a concave curved surface; 23 gimbal frame portions; 24 magnets (drive mechanism); 24A magnet; 24B magnets; 32 coils (driving mechanism); a 32A coil; a 32B coil; 33 hall element (driving mechanism); 33A hall element; 33B hall element; 41a fixed body side support; 41a convex curved surface; 42a movable body side support; 42a convex curved surface; a 50-type imaging element; a 51 flexible printed substrate; 52 flexible printed circuit board (driving mechanism); 60 reinforcing plates (driving mechanism); 60A reinforcing plate; 60B stiffener; 61 a protrusion; 62 abutment; 100 smart phone; 101 a glass cover; 161 contact; 161b contact; 161d contact portions; 162 abutted portions; 162a abutted portion; 162c abutted portions; d1 incidence direction (optical axis direction); l1 a first axis; and a second axis L2.

Claims

1. An optical unit, comprising:

a movable body provided with an optical module;

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

a driving mechanism for rotationally moving the movable body with respect to the fixed body,

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

the reinforcing plate is provided with a convex part, the fixed body is provided with a contact part contacted with the convex part,

the fixing body is provided with a contacted part which is contacted with a contact part arranged at the area of the reinforcing plate opposite to the convex part when the convex part is contacted with the contact part, thereby fixing the reinforcing plate on the fixing body,

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

2. An optical unit as claimed in claim 1, characterized in that,

the convex portion and the contact portion are pressed into contact with each other.

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

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

4. An optical unit according to claim 1 or 2, characterized in that,

the reinforcing plate is provided with a plurality of the convex portions.

5. An optical unit as claimed in claim 3, characterized in that,

the reinforcing plate is provided with a plurality of the convex portions.

6. A method for manufacturing an optical unit is characterized in that,

the optical unit according to any one of claims 1 to 5,

the manufacturing method comprises the following steps:

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

a step of fixing the coil and the flexible printed board to the reinforcing plate;

a step of forming the fixing body having a contact portion capable of bringing the protruding portion into contact with the fixing body and an abutted portion capable of abutting the abutting portion provided in a region of the reinforcing plate opposite to the protruding portion; and

and a step of bringing the convex portion into contact with the contact portion while bringing the contact portion into contact with the portion to be contacted.