Optical unit with shake correction function

Abstract

The present invention provides an optical unit with a shake correction function. In the optical unit with a shake correction function for correcting the shake of a camera module, the design freedom of a portable device equipped with the optical unit with a shake correction function can be ensured, and the unit can be miniaturized in a direction perpendicular to the optical axis direction of the camera module. In the optical unit with a shake correction function, a first wiring substrate (10) led out from the camera module (2) and a second wiring substrate (11) mounted with a first drive coil (25) and a second drive coil (27) are electrically connected via a first connecting portion (10d) and a second connecting portion (11b) that are electrically connected in a mutually overlapping state. In addition, in the optical unit with a shake correction function, a lead portion (10e) of the first wiring substrate (10) is led out to the outer peripheral side of the optical unit with a shake correction function.

Description

Technical Field

[0001] The present invention relates to an optical unit with a shake correction function installed in a portable device or the like. Background Art

[0002] Conventionally, an optical unit with a shake correction function installed in a portable device or the like is known (see, for example, Patent Document 1). The optical unit with a shake correction function described in Patent Document 1 includes a movable body having an optical module, a gimbal mechanism that supports the movable body so that it can swing, a fixed body that supports the movable body via the gimbal mechanism, a shake correction drive mechanism that causes the movable body to swing relative to the fixed body, a first flexible printed circuit board connected to the movable body, and a second flexible printed circuit board attached to the fixed body.

[0003] In the optical unit with a shake correction function described in Patent Document 1, the shake correction drive mechanism includes a first magnet and a first coil that rotate the movable body about the X-axis, and a second magnet and a second coil that rotate the movable body about the Y-axis. The first magnet and the first coil are opposed in the Y-axis direction, and the second magnet and the second coil are opposed in the X-axis direction. The fixed body includes an outer frame portion that surrounds the outer periphery of the movable body. The outer frame portion has a square shape when viewed in the direction of the optical axis of the optical module, that is, the optical axis direction, and the four sides of the outer periphery of the outer frame portion are parallel to the X-axis direction or the Y-axis direction.

[0004] In addition, in the optical unit with a shake correction function described in Patent Document 1, the second flexible printed circuit board includes: a coil mounting portion, on which the first coil and the second coil are mounted; and a lead portion, which is connected to the coil mounting portion and is led to the outer peripheral side of the outer frame portion of the fixed body. The coil mounting portion is passed along one of the two sides of the outer frame portion parallel to the X-axis direction and one of the two sides of the outer frame portion parallel to the Y-axis direction. The lead portion is led to the outer peripheral side of the outer frame portion on the side facing the X-axis direction. The first flexible printed circuit board is led to the outer peripheral side of the outer frame portion on the side facing the Y-axis direction. The first flexible printed circuit board led to one side in the Y-axis direction is folded back twice.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent Application Laid-Open No. 2020-160370 Summary of the Invention

[0008] Technical problem to be solved by the invention

[0009] In the optical unit with a shake correction function described in Patent Document 1, the first and second flexible printed circuit boards are each extended toward the outer periphery of the optical unit with a shake correction function. Therefore, a portable device or the like equipped with the optical unit with a shake correction function requires separate connectors for connecting to the first flexible printed circuit board and the second flexible printed circuit board. Consequently, the portable device or the like equipped with the optical unit with a shake correction function requires a larger space for arranging the connectors for electrically connecting the optical unit with a shake correction function, potentially reducing the design freedom of the portable device or the like equipped with the optical unit with a shake correction function.

[0010] In addition, in the optical unit with a shake correction function described in Patent Document 1, the first flexible printed substrate extended to one side in the Y-axis direction is folded back twice, and space is required for folding back the first flexible printed substrate. Therefore, the optical unit with a shake correction function may be enlarged in the direction orthogonal to the optical axis direction of the optical module.

[0011] Therefore, the technical problem of the present invention is to provide an optical unit with a shake correction function, in which the optical unit with a shake correction function has a shake correction function for correcting the shake of a camera module, the design freedom of a portable device, etc. equipped with the optical unit with a shake correction function can be ensured, and the unit can be miniaturized in a direction orthogonal to the optical axis direction of the camera module.

[0012] Technical solutions used to solve technical problems

[0013] In order to solve the above technical problems, the optical unit with a shake correction function of the present invention comprises: a movable body, wherein the movable body has a camera module; an intermediate component, wherein the intermediate component holds the movable body in a rotatable manner; a fixed body, wherein the fixed body holds the intermediate component in a rotatable manner; a first magnetic drive mechanism and a second magnetic drive mechanism, wherein the first magnetic drive mechanism and the second magnetic drive mechanism are used to rotate the movable body relative to the fixed body in a manner that the optical axis of the camera module is tilted in any direction; and a first wiring substrate and a second wiring substrate, wherein at least a portion of the first wiring substrate and the second wiring substrate is composed of a flexible printed substrate, and the first magnetic drive mechanism has a configuration in which the optical axis of the camera module is located at a specified position. The first drive coil and the second drive coil are mounted on the second wiring substrate, the first wiring substrate comprises a first strip-shaped portion formed in a slender strip shape and a first connecting portion for electrically connecting the first wiring substrate and the second wiring substrate, and a second drive magnet and a second driving coil are arranged opposite to each other in a second direction perpendicular to the optical axis of the camera module and the first direction when the optical axis of the camera module is in the reference position. The second wiring substrate includes a second strip-shaped portion formed in the shape of an elongated strip and a second connecting portion for electrically connecting the first wiring substrate to the second wiring substrate, the first wiring substrate or the second wiring substrate includes a lead-out portion led out toward the outer peripheral side of the fixed body, when the optical axis of the camera module is located at the reference position, the outer shape of the intermediate component holding portion is a square or rectangular shape when viewed from the optical axis direction which is the direction of the optical axis of the camera module, and the four sides constituting the outer peripheral surface of the intermediate component holding portion are parallel to the first direction or the second direction, one of the two sides of the intermediate component holding portion parallel to the first direction is used as the first side, the other of the two sides of the intermediate component holding portion parallel to the first direction is used as the second side, and When one of the two sides of the intermediate component holding portion parallel to the second direction is used as the third side, and the other of the two sides of the intermediate component holding portion parallel to the second direction is used as the fourth side, the optical axis direction of the camera module when the optical axis is in the reference position is parallel to the width direction of the first strip-shaped portion, and the first strip-shaped portion is passed through the first side and the third side, the optical axis direction of the camera module when the optical axis is in the reference position is parallel to the width direction of the second strip-shaped portion, and the second strip-shaped portion is passed through the second side and the fourth side, and the first connecting portion and the second connecting portion are electrically connected to each other in a state of overlapping with each other in the second direction on the first side or the second side, or are electrically connected to each other in a state of overlapping with each other in the first direction on the third side or the fourth side.

[0014] In the optical unit with a shake correction function of the present invention, a first wiring substrate extending from a camera module and a second wiring substrate on which first and second drive coils are mounted are electrically connected via a first connecting portion and a second connecting portion that are electrically connected in an overlapping manner. Furthermore, in the present invention, the lead portion of the first wiring substrate or the second wiring substrate extends toward the outer periphery of the fixed body.

[0015] Therefore, in the present invention, in a portable device or the like equipped with an optical unit with a shake correction function, by providing a connector connected to one lead portion, the first and second wiring substrates can be electrically connected to the portable device or the like. Therefore, in the present invention, in a portable device or the like equipped with an optical unit with a shake correction function, the space required to arrange the connector for electrically connecting the optical unit with a shake correction function can be reduced, thereby ensuring design freedom for the portable device or the like.

[0016] Furthermore, in the present invention, when the optical axis of the camera module is in the reference position, the optical axis direction is parallel to the width direction of the first strip-shaped portion of the first wiring substrate, and the first strip-shaped portion is routed along the first and third sides. When the optical axis of the camera module is in the reference position, the optical axis direction is parallel to the width direction of the second strip-shaped portion of the second wiring substrate, and the second strip-shaped portion is routed along the second and fourth sides. Furthermore, in the present invention, the first connecting portion and the second connecting portion are electrically connected on the first or second side while overlapping in the second direction, or are electrically connected on the third or fourth side while overlapping in the first direction.

[0017] Therefore, in the present invention, the first strip-shaped portion, the second strip-shaped portion, the first connecting portion, and the second connecting portion can be compactly arranged along the outer circumference of the intermediate member holding portion in the first and second directions. Consequently, in the present invention, the optical unit with a shake correction function can be miniaturized in both the first and second directions. Specifically, in the present invention, the optical unit with a shake correction function can be miniaturized in a direction perpendicular to the optical axis of the camera module.

[0018] In the present invention, for example, the first strip-shaped portion and the second strip-shaped portion are formed of a flexible printed circuit board.

[0019] In the present invention, it is preferred that the first wiring substrate includes a lead-out portion, the lead-out portion is led out from the center portion of the first side toward one side in the second direction, and the first connection portion and the second connection portion are electrically connected in an overlapping state on the side of the first side closer to the first direction than the lead-out portion. If configured in this way, the length from the lead-out portion to the end of the first connection portion can be shortened, thereby reducing the cost of the first wiring substrate. In addition, since the length from the lead-out portion to the end of the first connection portion can be shortened, the wiring resistance between the lead-out portion and the end of the first connection portion can be reduced. In addition, if configured in this way, the distance between the lead-out portion and the second connection portion can be shortened, thereby reducing the wiring resistance between the lead-out portion and the second connection portion.

[0020] In the present invention, for example, the first wiring substrate includes a connecting portion connecting the end of the first strip portion, the end of the first connecting portion, and the end of the lead portion, and the connecting portion is fixed to the intermediate member holding portion on the first side.

[0021] In the present invention, it is preferred that the first and second connecting portions are electrically connected while overlapping on the first side, the second connecting portion is positioned closer to the intermediate member retaining portion than the first connecting portion in the second direction, and the second connecting portion has higher rigidity than the first connecting portion. This configuration can, for example, suppress deformation of the first and second connecting portions when soldering them from the outside in the second direction while overlapping them. This prevents defects such as cracks from forming at the connection between the first and second connecting portions.

[0022] In the present invention, the first connecting portion is preferably formed from a flexible printed circuit board having a single layer of wiring pattern formed on only one side. This configuration allows the thickness of the first connecting portion, where any of the first, second, third, and fourth sides overlaps with the second connecting portion, to be reduced. Therefore, even when the first and second connecting portions overlap, the optical unit with a shake correction function can be miniaturized in either the first or second direction.

[0023] Effects of the Invention

[0024] As described above, in the present invention, in an optical unit with a shake correction function having a shake correction function for correcting the shake of a camera module, it is possible to ensure the design freedom of a portable device, etc. equipped with the optical unit with a shake correction function, and it is possible to miniaturize the optical unit with a shake correction function in a direction orthogonal to the optical axis direction of the camera module. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a perspective view of an optical unit with a shake correction function according to an embodiment of the present invention.

[0026] Figure 2 yes Figure 1 The exploded perspective view of the optical unit with shake correction function is shown.

[0027] Figure 3 It is from Figure 1 The optical unit with a shake correction function is shown in a top view with the fixing body removed.

[0028] Figure 4 It will Figure 1 The illustrated case, cover member, second wiring board, etc. are extracted and shown in a perspective view.

[0029] Figure 5 It will Figure 3 The first wiring board and the second wiring board shown are extracted and shown in a perspective view.

[0030] Description of Reference Numerals

[0031] 1…Optical unit (optical unit with shake correction function); 2…Camera module; 3…Moveable body; 4…Intermediate member; 5…Fixed body; 8…First magnetic drive mechanism; 9…Second magnetic drive mechanism; 10…First wiring substrate; 10c…Third substrate portion (connecting portion); 10d…Fourth substrate portion (first connecting portion); 10e…Fifth substrate portion (lead-out portion); 10h…First strip-shaped portion; 11…Second wiring substrate; 11a…Second strip-shaped portion; 11b…Substrate portion (second connecting portion); 17…Casing (intermediate member holding portion); 17a…First side; 17b…Second side; 17c…Third side; 17d…Fourth side; 24…First drive magnet; 25…First drive coil; 26…Second drive magnet; 27…Second drive coil; L…Optical axis; X…First direction; Y…Second direction DETAILED DESCRIPTION

[0032] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0033] (Overall structure of the optical unit with shake correction function)

[0034] Figure 1 It is a perspective view of an optical unit 1 with a shake correction function according to an embodiment of the present invention. Figure 2 yes Figure 1 The exploded perspective view of the optical unit 1 with shake correction function is shown. Figure 3 It is from Figure 1 The optical unit 1 with a shake correction function is shown in a top view with the fixing body 5 removed.

[0035] In the following description, Figure 1As shown in FIG, the three mutually orthogonal directions are set as the X direction, the Y direction and the Z direction, the X direction is set as the left-right direction, the Y direction is set as the front-back direction, and the Z direction is set as the up-down direction. Figure 1 The X1 direction side of the same is set as the "right" side, and the opposite side is Figure 1 The X2 direction side is set as the "left" side, and the side in the front-back direction is set as Figure 1 The Y1 direction side of the same is set as the "front" side, and the opposite side is Figure 1 The Y2 direction side of the same is set as the "back" side, and the side in the up and down direction is set as Figure 1 The Z1 direction side of the same is set as the "upper" side, and the opposite side is Figure 1 The Z2 direction side of the etc. is set as the "downward" side.

[0036] The optical unit 1 with a shake correction function (hereinafter referred to as "optical unit 1") of this embodiment is a small and thin unit installed in a portable device such as a smartphone, and includes a camera module 2 having a lens and an imaging element for shooting. The optical unit 1 has a shake correction function for preventing image distortion caused by shake during shooting. The optical unit 1 is formed as a whole into a thin, flat rectangular parallelepiped shape. The optical unit 1 of this embodiment has a square shape when viewed from the optical axis L, which is the direction of the optical axis of the camera module 2. The four side surfaces of the optical unit 1 are parallel to the ZX plane defined by the left-right and up-down directions, or the YZ plane defined by the front-back and up-down directions.

[0037] The optical unit 1 includes a movable body 3 having a camera module 2, an intermediate member 4 that rotatably holds the movable body 3, and a fixed body 5 that rotatably holds the intermediate member 4 (see FIG. Figure 1 The movable body 3 can be moved in a first intersecting direction ( Figure 3 The movable body 3 can rotate relative to the intermediate member 4 with the V direction of the first cross direction as the axial direction. Figure 3 ) is the rotation center and rotates relative to the intermediate member 4. The first intersecting direction of this embodiment is perpendicular to the optical axis L.

[0038] The intermediate member 4 can be arranged in a second intersecting direction ( Figure 3 The intermediate member 4 can rotate relative to the fixed body 5 with the W direction of the intermediate member 4 being the axial direction of the rotation. Figure 3) is the center of rotation relative to the fixed body 5. In this embodiment, the second intersecting direction is orthogonal to the first intersecting direction. In this way, a two-axis gimbal mechanism is formed between the movable body 3 and the fixed body 5.

[0039] In this embodiment, when no current is supplied to the first drive coil 25 and the second drive coil 27 described later, the movable body 3 and the intermediate component 4 are arranged in a predetermined reference position, and the optical axis L of the camera module 2 is arranged in a predetermined reference position. When the movable body 3 and the intermediate component 4 are arranged in the reference position and the optical axis L of the camera module 2 is located in the reference position, the direction of the optical axis of the camera module 2 is consistent with the up-down direction. The left-right direction (X direction) of this embodiment is a first direction that is orthogonal to the optical axis L of the camera module 2 when the optical axis L of the camera module 2 is located in the reference position. In addition, the front-back direction (Y direction) is a second direction that is orthogonal to the left-right direction (the first direction) and the optical axis L of the camera module 2 when the optical axis L of the camera module 2 is located in the reference position.

[0040] Furthermore, when the movable body 3 is arranged at a predetermined reference position, the second intersecting direction (W direction) is perpendicular to the optical axis L. That is, when the movable body 3 is arranged at a predetermined reference position and does not rotate relative to the intermediate member 4, the second intersecting direction is perpendicular to the optical axis L. On the other hand, when the movable body 3 rotates relative to the intermediate member 4, the second intersecting direction intersects the optical axis L, but not at a right angle. When viewed from above, the second intersecting direction (W direction) is perpendicular to the front-back direction. Figure 3 The clockwise direction is offset by about 45 degrees.

[0041] The optical unit 1 includes a first magnetic drive mechanism 8 and a second magnetic drive mechanism 9 for rotating the movable body 3 relative to the fixed body 5 so that the optical axis L of the camera module 2 is tilted in an arbitrary direction (see Figure 3 ). In addition, the optical unit 1 has: a first wiring substrate 10, which is extended from the camera module 2; and a second wiring substrate 11, on which a first drive coil 25, which is described later and constitutes a part of the first magnetic drive mechanism 8, and a second drive coil 27, which is described later and constitutes a part of the second magnetic drive mechanism 9, are mounted. First fulcrum portions 12, which serve as fulcrums for the rotation of the movable body 3 relative to the intermediate member 4, are arranged at both ends of the intermediate member 4 in the first cross direction. Second fulcrum portions 13, which serve as fulcrums for the rotation of the intermediate member 4 relative to the fixed body 5, are arranged at both ends of the intermediate member 4 in the second cross direction.

[0042] The movable body 3 is formed as a whole into a flat, roughly rectangular parallelepiped shape with a relatively thin thickness in the direction of the optical axis. The movable body 3 includes a retaining frame 16 for securing the camera module 2. The retaining frame 16 is formed of a resin material. The retaining frame 16 is formed into a square frame shape. When the movable body 3 and the intermediate component 4 are arranged in the reference position, the outer shape of the retaining frame 16 is square when viewed from the optical axis. In addition, when the movable body 3 and the intermediate component 4 are arranged in the reference position, two of the four sides of the outer peripheral surface of the retaining frame 16, which has a square outer shape, are parallel to the front-to-back direction, and the remaining two sides are parallel to the left-to-right direction.

[0043] The camera module 2 is fixed to the inner circumference of the holder 16 so that the outer circumference of the camera module 2 is covered by the holder 16. As described above, the camera module 2 includes a lens and an image sensor. The image sensor is located at the bottom of the camera module 2, and the camera module 2 captures images of subjects located above the camera module 2.

[0044] The intermediate component 4 is formed from a metal material such as stainless steel. Furthermore, the intermediate component 4 is a leaf spring formed by bending a resilient metal plate into a predetermined shape. The intermediate component 4 consists of a base 4a positioned above the retaining frame 16, two arms 4b extending from the base 4a in a first intersecting direction, and two arms 4c extending from the base 4a in a second intersecting direction. The base 4a is formed into a roughly square frame shape. The upper end of the camera module 2 is located on the inner periphery of the base 4a.

[0045] The front ends of the arms 4b and 4c are bent downward. Arm 4b is positioned on the inner circumference of retainer 16. Arm 4c is positioned on the outer circumference of retainer 16. Furthermore, arm 4c is positioned on the inner circumference of housing 17, described later, which constitutes a portion of fixed body 5. A hemispherical recess is formed at the front end of arm 4b, into which a portion of the sphere constituting a portion of first fulcrum 12 is positioned. A hemispherical recess is formed at the front end of arm 4c, into which a portion of the sphere constituting a portion of second fulcrum 13 is positioned.

[0046] The fixed body 5 includes a frame-shaped housing 17 disposed outside the movable body 3 and the intermediate member 4, a cover member 18 covering the side and lower surfaces of the housing 17, and a cover member 19 covering the upper surface of the housing 17. The housing 17 is formed of a resin material. The intermediate member 4 is rotatably held by the housing 17. In this embodiment, the housing 17 serves as an intermediate member holding portion that rotatably holds the intermediate member 4.

[0047] The housing 17 is formed into a flat, rectangular cylindrical shape with both ends open in the vertical direction. When viewed from the vertical direction, the housing 17 has a square frame shape. That is, when the optical axis L of the camera module 2 is at the reference position, the housing 17 has a square shape when viewed from the optical axis of the camera module 2. When viewed from the vertical direction, two of the four sides of the outer peripheral surface of the housing 17, which has a square shape, are parallel to the front-to-back direction, and the remaining two sides are parallel to the left-to-right direction. That is, when viewed from the vertical direction, the four sides of the outer peripheral surface of the housing 17 are parallel to the front-to-back direction or the left-to-right direction.

[0048] The cover part 18 is formed in the shape of a square tube with a bottom having a flat plate-shaped bottom and a square tube-shaped tube rising from the bottom to the upper side. The outer shape of the cover part 18 when viewed from the top and bottom is a square. When viewed from the top and bottom, two of the four sides of the outer peripheral surface of the cover part 18 having a square outer shape are parallel to the front-to-back direction, and the remaining two sides are parallel to the left-to-right direction. The cover part 18 constitutes the lower surface and side surfaces of the optical unit 1. A notch portion 18a is formed on the cover part 18 for leading the first wiring substrate 10 to the outer peripheral side of the optical unit 1. The notch portion 18a is formed at the front end portion and the front side portion of the bottom of the cover part 18. In addition, the notch portion 18a is formed in the center portion of the cover part 18 in the left-to-right direction.

[0049] The cover member 19 primarily consists of a flat plate-shaped cover portion 19a that covers the upper surface of the housing 17. The cover portion 19a is formed into a square frame. When viewed from above and below, the outer shape of the cover member 19 is square. When viewed from above and below, two of the four sides of the outer peripheral surface of the square-shaped cover member 19 are parallel to the front-to-back direction, and the remaining two sides are parallel to the left-to-right direction. The camera module 2 and a portion of the intermediate member 4 are located within the inner periphery of the cover portion 19a.

[0050] The first fulcrum portion 12 includes a support member 20 fixed to the retaining frame 16 and a sphere fixed to the support member 20. A portion of the sphere fixed to the support member 20 is arranged in a recess formed at the front end portion of the arm portion 4b. The sphere contacts the bottom surface of the recess of the arm portion 4b from the outside in the first cross direction with a predetermined contact pressure due to the elasticity of the arm portion 4b. The second fulcrum portion 13 includes a support member 21 fixed to the housing 17 and a sphere fixed to the support member 21. A portion of the sphere fixed to the support member 21 is arranged in a recess formed at the front end portion of the arm portion 4c. The sphere contacts the bottom surface of the recess of the arm portion 4c from the outside in the second cross direction with a predetermined contact pressure due to the elasticity of the arm portion 4c.

[0051] The first magnetic drive mechanism 8 includes a first drive magnet 24 and a first drive coil 25, which are arranged in a left-right direction. The second magnetic drive mechanism 9 includes a second drive magnet 26 and a second drive coil 27, which are arranged in a front-back direction. The first drive magnet 24 and the second drive magnet 26 are formed into rectangular flat plates. The first drive coil 25 and the second drive coil 27 are, for example, air-core coils formed by winding a conductive wire into an air-core shape.

[0052] The first drive magnet 24 is disposed in a recess formed on the left side of the holder 16 and is fixed to the left side of the holder 16. The first drive coil 25 is disposed in a through-hole formed on the left side of the housing 17. Furthermore, the first drive coil 25 is mounted on the second wiring board 11. The first magnetic drive mechanism 8 rotates the movable body 3 relative to the fixed body 5 about an axis perpendicular to the optical axis L of the camera module 2 and parallel to the front-to-back direction.

[0053] The second drive magnet 26 is disposed in a recess formed in the rear side of the holder 16 and is fixed to the rear side of the holder 16. The second drive coil 27 is disposed in a through-hole formed in the rear portion of the housing 17. Furthermore, the second drive coil 27 is mounted on the second wiring board 11. The second magnetic drive mechanism 9 rotates the movable body 3 relative to the fixed body 5 about an axis that is perpendicular to the optical axis L of the camera module 2 and parallel to the left-right direction.

[0054] In the optical unit 1, when a change in the tilt of the movable body 3 is detected by a predetermined detection mechanism for detecting changes in the tilt of the movable body 3, a current is supplied to at least one of the first drive coil 25 and the second drive coil 27 based on the detection result of the detection mechanism, thereby correcting the vibration. The first magnetic drive mechanism 8 and the second magnetic drive mechanism 9 rotate the movable body 3 relative to the fixed body 5 about at least one of the first axis L1 and the second axis L2 as the rotation center.

[0055] (Structure and Route of the First and Second Wiring Substrates)

[0056] Figure 4 It will Figure 1 The case 17, the cover member 19, the second wiring board 11, and the like are shown in a perspective view extracted from the drawing. Figure 5 It will Figure 3 The first wiring board 10 and the second wiring board 11 are shown in a perspective view extracted from the drawing.

[0057] The first wiring substrate 10 is a rigid flexible substrate that integrates a flexible printed circuit board and a rigid substrate, and a portion of the first wiring substrate 10 is formed by the flexible printed circuit board. Furthermore, the first wiring substrate 10 comprises a first substrate portion 10a fixed to the lower surface of the camera module 2; a second substrate portion 10b connected to the first substrate portion 10a at one end; a third substrate portion 10c connected to the other end of the second substrate portion 10b; a fourth substrate portion 10d and a fifth substrate portion 10e connected to the third substrate portion 10c at one end; and a sixth substrate portion 10f connected to the other end of the fifth substrate portion 10e.

[0058] The first, second, third, and sixth substrate sections 10a, 10b, 10c, 10d, 10e, and 10f are integrally formed. The first, third, and sixth substrate sections 10a, 10c, and 10f are constructed from flexible printed circuit boards (FPCBs) and rigid substrates. The second, fourth, and fifth substrate sections 10b, 10d, and 10e are constructed from FPCBs.

[0059] As described above, when viewed from the top and bottom, two of the four sides constituting the outer peripheral surface of the housing 17 are parallel to the left-right direction, and the remaining two sides are parallel to the front-back direction. In the following description, one of the two sides of the housing 17 parallel to the left-right direction is referred to as the first side 17a, the other of the two sides of the housing 17 parallel to the left-right direction is referred to as the second side 17b, one of the two sides of the housing 17 parallel to the front-back direction is referred to as the third side 17c, and the other of the two sides of the housing 17 parallel to the front-back direction is referred to as the fourth side 17d (see Figure 2 、 Figure 4 Specifically, the front side of the housing 17 when viewed from the top and bottom is set as the first side 17a, the rear side of the housing 17 when viewed from the top and bottom is set as the second side 17b, the right side of the housing 17 when viewed from the top and bottom is set as the third side 17c, and the left side of the housing 17 when viewed from the bottom is set as the fourth side 17d.

[0060] As described above, the first substrate portion 10a is fixed to the lower surface of the camera module 2. The first substrate portion 10a is configured so that its thickness is aligned with its vertical direction. An imaging element is mounted on the upper surface of the first substrate portion 10a. The second substrate portion 10b extends from the first substrate portion 10a. The second substrate portion 10b extends from the first substrate portion 10a to the right, then passes forward, wraps around, and then wraps around to the left.

[0061] The second substrate portion 10b consists of a lead portion 10g, whose left end is connected to the first substrate portion 10a, and a first strip portion 10h, whose rear end is connected to the right end of the lead portion 10g. As described above, the second substrate portion 10b is formed from a flexible printed circuit board (FPC). Therefore, the lead portion 10g and the first strip portion 10h are also formed from FPC. The lead portion 10g is arranged so that its thickness is aligned with the vertical direction. At the boundary between the lead portion 10g and the first strip portion 10h, the second substrate portion 10b is bent upward at a 90-degree angle. In the second substrate portion 10b, two layers of FPC, each with wiring patterns formed on both surfaces, are stacked with a gap between them.

[0062] The first strip 10h is formed into an elongated strip. The first strip 10h is configured so that its width coincides with its vertical direction. Specifically, when the optical axis L of the camera module 2 is in the reference position, the optical axis of the camera module 2 is parallel to the width of the first strip 10h. The first strip 10h is threaded around the outer circumference of the housing 17. Furthermore, the first strip 10h is threaded along the first side 17a and the third side 17c. Specifically, the first strip 10h is threaded along the first side 17a and the third side 17c in its upright position.

[0063] The first strip 10h is passed forward from the center of the third side 17c in the front-to-back direction to the front end of the third side 17c, bent 90 degrees, and then passed leftward to the center of the first side 17a in the left-to-right direction. The thickness of the portion of the first strip 10h passing along the third side 17c is aligned with the left-to-right direction, while the thickness of the portion of the first strip 10h passing along the first side 17a is aligned with the front-to-back direction.

[0064] A thin reinforcing plate 30 is fixed to the boundary between the portion of the first strip-shaped portion 10h that is passed along the first side 17a and the portion that is passed along the third side 17c. The reinforcing plate 30 is formed into an L shape. Similarly, a thin reinforcing plate 30 is fixed to the boundary between the lead portion 10g and the first strip-shaped portion 10h. The reinforcing plate 30 is also fixed to the boundary between the lead portion 10g and the first strip-shaped portion 10h. Figure 3 A gap is formed between the first strip-shaped portion 10 h and the side surface of the housing 17 , and the first strip-shaped portion 10 h is not fixed to the housing 17 .

[0065] The third substrate portion 10c is configured so that its thickness coincides with its front-to-back direction. The third substrate portion 10c is secured to the housing 17 at its first side 17a. Specifically, the center portion of the first side 17a of the third substrate portion 10c in the left-right direction is secured to the outer side surface of the housing 17. A substrate securing portion 17f protruding forward is formed on the front side surface of the housing 17. The third substrate portion 10c is secured to the substrate securing portion 17f. The left end of the first strip-shaped portion 10h is connected to the right end of the third substrate portion 10c.

[0066] The fourth substrate portion 10d is formed in a strip shape with its longitudinal direction extending horizontally. The fourth substrate portion 10d is arranged so that its thickness aligns with the front-to-back direction, and its width is parallel to the vertical direction. The fourth substrate portion 10d is comprised of a single-layer flexible printed circuit board with a wiring pattern formed only on one side. The right end of the fourth substrate portion 10d is connected to the left end of the third substrate portion 10c. The fourth substrate portion 10d is arranged along the first side 17a.

[0067] The fifth substrate portion 10e is led out from the third substrate portion 10c toward the front side. The fifth substrate portion 10e is configured in such a manner that the thickness direction of the fifth substrate portion 10e is consistent with the up-down direction. The rear end portion of the fifth substrate portion 10e is connected to the lower end portion of the third substrate portion 10c. The fifth substrate portion 10e is led out from the center portion in the left-right direction of the first side 17a toward the front side, which is one side in the front-back direction. That is, the fifth substrate portion 10e is led out toward the outer peripheral side of the fixed body 5. The fifth substrate portion 10e is led out in such a manner as to pass through the notch portion 18a of the cover component 18, and a portion of the fifth substrate portion 10e is configured in the notch portion 18a. The fifth substrate portion 10e of this embodiment is a lead-out portion that is led out toward the outer peripheral side of the fixed body 5.

[0068] The sixth substrate 10f is arranged so that its thickness is aligned with the vertical direction. The sixth substrate 10f is connected to the front end of the fifth substrate 10e. The sixth substrate 10f is connected to a connector provided inside a portable device such as a smartphone in which the optical unit 1 is mounted.

[0069] The second wiring substrate 11 is a flexible printed circuit board. Specifically, the entire second wiring substrate 11 is made of a flexible printed circuit board. Furthermore, the second wiring substrate 11 comprises a second strip-shaped portion 11a formed in the shape of an elongated strip and a substrate portion 11b connected to the second strip-shaped portion 11a. Both the second strip-shaped portion 11a and the substrate portion 11b are made of a flexible printed circuit board.

[0070] The second strip 11a is configured so that its width is aligned with its vertical direction. That is, when the optical axis L of the camera module 2 is in the reference position, the optical axis of the camera module 2 is parallel to the width of the second strip 11a. The second strip 11a is threaded around the outer circumference of the housing 17. Furthermore, the second strip 11a is threaded along the second side 17b and the fourth side 17d. In other words, when in the upright position, the second strip 11a is threaded along the second side 17b and the fourth side 17d.

[0071] Furthermore, the second strip 11a extends from the right end of the second side 17b toward the left, wraps around the left end of the second side 17b, bends 90 degrees, and then wraps along the fourth side 17d to the front end of the fourth side 17d. The thickness of the portion of the second strip 11a that wraps along the second side 17b aligns with the front-to-back direction, while the thickness of the portion of the second strip 11a that wraps along the fourth side 17d aligns with the left-to-right direction. The second strip 11a is fixed to the outer circumferential surface of the housing 17.

[0072] The base portion 11b is formed into a strip with its longitudinal direction extending in the horizontal direction. The base portion 11b is arranged so that its width coincides with the vertical direction, and the width of the base portion 11b is parallel to the vertical direction. The left end of the base portion 11b is connected to the front end of the second strip-shaped portion 11a. The base portion 11b is threaded along the first side 17a. Furthermore, the base portion 11b is threaded from the left end of the first side 17a to the center of the first side 17a in the horizontal direction.

[0073] Fourth substrate portion 10d and substrate portion 11b of first wiring substrate 10 are electrically connected on first side 17a, overlapping each other in the front-to-back direction. Specifically, fourth substrate portion 10d and substrate portion 11b are electrically connected on first side 17a, overlapping each other to the left of fifth substrate portion 10e. Fourth substrate portion 10d and substrate portion 11b are secured to each other by soldering. Fourth substrate portion 10d and substrate portion 11b function to electrically connect first wiring substrate 10 and second wiring substrate 11.

[0074] The fourth substrate portion 10d of this embodiment serves as a first connection portion for electrically connecting the first wiring substrate 10 and the second wiring substrate 11, and the substrate portion 11b serves as a second connection portion for electrically connecting the first wiring substrate 10 and the second wiring substrate 11. Furthermore, the third substrate portion 10c of this embodiment serves as a connecting portion that connects the end of the first strip portion 10h, the end of the fourth substrate portion 10d serving as the first connection portion, and the end of the fifth substrate portion 10e serving as the lead portion.

[0075] The substrate portion 11b is positioned behind the fourth substrate portion 10d. Specifically, the substrate portion 11b is positioned closer to the housing 17 than the fourth substrate portion 10d in the front-to-back direction. Pads for soldering the fourth substrate portion 10d and the substrate portion 11b are formed on the rear surface of the fourth substrate portion 10d and the front surface of the substrate portion 11b. The rear surface of the fourth substrate portion 10d contacts the front surface of the substrate portion 11b.

[0076] The rigidity of substrate portion 11b is higher than that of fourth substrate portion 10d. For example, if substrate portion 11b is composed of four layers of flexible printed circuit boards, the rigidity of substrate portion 11b is higher than that of fourth substrate portion 10d, which is composed of a single layer of flexible printed circuit boards. Alternatively, the rigidity of substrate portion 11b can be increased relative to that of fourth substrate portion 10d by attaching a reinforcing plate approximately 0.1 to 0.2 mm thick to the rear surface of substrate portion 11b.

[0077] When assembling the optical unit 1, first assemble the camera module 2, the first wiring substrate 10, and the components other than the cover member 18. Then, assemble the camera module 2 with the first wiring substrate 10 fixed. At this time, solder the fourth substrate portion 10d to the substrate portion 11b from the front. In order to facilitate the soldering of the fourth substrate portion 10d to the substrate portion 11b, the substrate portion 11b is exposed on the front side of the housing 17 when the cover member 18 is removed (see FIG. 1 ). Figure 4 Once the camera module 2 is assembled with the first wiring substrate 10 fixed thereto, the cover member 18 is mounted, completing the assembly of the optical unit 1 .

[0078] (Main effect of this method)

[0079] As described above, in this embodiment, the first wiring substrate 10 extending from the camera module 2 and the second wiring substrate 11 on which the first drive coil 25 and the second drive coil 27 are mounted are electrically connected via the fourth substrate portion 10d and the substrate portion 11b. Furthermore, in this embodiment, the fifth substrate portion 10e is extended toward the outer periphery of the fixed body 5. Furthermore, in this embodiment, the sixth substrate portion 10f is connected to the end of the fifth substrate portion 10e, and the sixth substrate portion 10f is connected to a connector provided inside the portable device in which the optical unit 1 is mounted.

[0080] Therefore, in this embodiment, by providing a connector connected to the sixth substrate portion 10f in a portable device equipped with the optical unit 1, the first wiring substrate 10 and the second wiring substrate 11 can be electrically connected to the portable device. Therefore, in this embodiment, in a portable device equipped with the optical unit 1, the space required to arrange the connector for electrically connecting the optical unit 1 can be reduced, thereby ensuring a degree of freedom in the design of the portable device.

[0081] In this embodiment, the width direction of the first strip 10h is parallel to the vertical direction, and the first strip 10h is threaded along the first side 17a and the third side 17c of the housing 17. Furthermore, in this embodiment, the width direction of the second strip 11a is parallel to the vertical direction, and the second strip 11a is threaded along the second side 17b and the fourth side 17d. Furthermore, in this embodiment, the fourth substrate 10d, which is connected to the first strip 10h via the third substrate 10c, and the substrate 11b, which is connected to the second strip 11a, are electrically connected on the first side 17a, overlapping in the front-to-back direction.

[0082] Therefore, in this embodiment, the first strip-shaped portion 10h, the fourth substrate portion 10d, and the second wiring substrate 11 can be compactly arranged along the outer circumference of the housing 17 in the front-back, left-right directions. Consequently, in this embodiment, the optical unit 1 can be miniaturized in the front-back, left-right directions. Furthermore, in this embodiment, the fourth substrate portion 10d is formed from a single flexible printed circuit board, making the thickness of the fourth substrate portion 10d thinner. Therefore, even if the fourth substrate portion 10d and the substrate portion 11b overlap in the front-back direction on the first side 17a, the optical unit 1 can still be miniaturized in the front-back direction.

[0083] In this embodiment, the fifth substrate portion 10e is led out to the front side from the center portion in the left-right direction of the first side 17a. In addition, in this embodiment, the fourth substrate portion 10d and the substrate portion 11b are connected in an overlapping state on the left side of the fifth substrate portion 10e of the first side 17a. Therefore, in this embodiment, the distance between the fifth substrate portion 10e and the substrate portion 11b in the left-right direction can be shortened. Therefore, in this embodiment, the length of the fourth substrate portion 10d (the length in the left-right direction) can be shortened, and as a result, the cost of the first wiring substrate 10 can be reduced. In addition, in this embodiment, since the length of the fourth substrate portion 10d can be shortened, the wiring resistance between the fifth substrate portion 10e and the substrate portion 11b can be reduced.

[0084] In this embodiment, the rigidity of substrate portion 11b, located behind fourth substrate portion 10d, is higher than that of fourth substrate portion 10d itself. Therefore, this embodiment can suppress deformation of fourth substrate portion 10d and substrate portion 11b when fourth substrate portion 10d is soldered to substrate portion 11b from the front during assembly of optical unit 1. Consequently, this embodiment can prevent problems such as cracks from forming at the connection between fourth substrate portion 10d and substrate portion 11b.

[0085] (Other embodiments)

[0086] The above-described embodiment is an example of a preferred embodiment of the present invention, but the present invention is not limited thereto and can be variously modified without departing from the spirit of the present invention.

[0087] In the above embodiment, at least one of the first substrate portion 10a, the third substrate portion 10c, and the sixth substrate portion 10f may be formed from a flexible printed circuit board. In other words, the entire first wiring substrate 10 may be formed from a flexible printed circuit board. Furthermore, in the above embodiment, at least one of the second substrate portion 10b, the fourth substrate portion 10d, and the fifth substrate portion 10e may be formed from a flexible printed circuit board and a rigid substrate.

[0088] In the above embodiment, the first substrate portion 10a, the second substrate portion 10b, the third substrate portion 10c, the fourth substrate portion 10d, the fifth substrate portion 10e, and the sixth substrate portion 10f are integrally formed. However, for example, the first substrate portion 10a may be formed separately, and the first substrate portion 10a and the second substrate portion 10b may be connected by soldering. Alternatively, for example, the second substrate portion 10b, the third substrate portion 10c, the fourth substrate portion 10d, and the fifth substrate portion 10e may be formed separately, and the second substrate portion 10b, the fourth substrate portion 10d, and the fifth substrate portion 10e may be connected by soldering to the third substrate portion 10c.

[0089] In the above embodiment, the second wiring substrate 11 may also be a rigid flexible substrate that integrates a flexible printed circuit board and a rigid substrate. In this case, for example, the portion of the second strip-shaped portion 11a where the first drive coil 25 is mounted, the portion of the second strip-shaped portion 11a where the second drive coil 27 is mounted, and the substrate portion 11b are composed of a flexible printed circuit board and a rigid substrate.

[0090] In the above configuration, the fourth substrate portion 10d and substrate portion 11b can also be electrically connected on the fourth side 17d, overlapping each other in the left-right direction. In this case, the length of the portion of the second strip portion 11a arranged along the fourth side 17d is shortened. Alternatively, the substrate portion 11d is connected to the front end of the second strip portion 11a and is routed along the fourth side 17d. Alternatively, the fourth substrate portion 10d can be routed along the first side 17a to the left end of the first side 17a, bent 90 degrees, and then routed rearward. Furthermore, when the fourth substrate portion 10d and substrate portion 11b are electrically connected on the fourth side 17d, overlapping each other, the fifth substrate portion 10e can be extended forward from the left end of the first side 17a.

[0091] Furthermore, in the above-described embodiment, when the second substrate portion 10b is extended forward from the first substrate portion 10a, the fourth substrate portion 10d and the substrate portion 11b can be electrically connected on the third side 17c so as to overlap each other in the left-right direction, or the fourth substrate portion 10d and the substrate portion 11b can be electrically connected on the second side 17b so as to overlap each other in the front-back direction. In this case, for example, the fifth substrate portion 10e is extended rightward from the third side 17c.

[0092] In the above embodiment, the second wiring substrate 11 may also include a lead portion extending toward the outer periphery of the fixed body 5. In this case, the first wiring substrate 10 does not include the fifth substrate portion 10e and the sixth substrate portion 10f. In addition, in the above embodiment, the outer shape of the housing 17 when viewed from the top and bottom may also be a rectangular shape. In this case, the outer shape of the cover member 18 when viewed from the top and bottom is also a rectangular shape. Moreover, in the above embodiment, the fourth substrate portion 10d may also be arranged on the rear side of the substrate portion 11b.

[0093] In the above-described embodiment, the optical unit 1 may also include a rotation mechanism that rotates the camera module 2 relative to the intermediate component 4 with the optical axis L of the camera module 2 as the rotation center. In this case, the rotation mechanism includes a driving coil mounted on the second wiring substrate 11 and a driving magnet arranged opposite to the driving coil. In addition, in this case, the intermediate component 4 includes a first intermediate component and a second intermediate component. The movable body 3 can rotate relative to the first intermediate component with the optical axis L of the camera module 2 as the rotation center, and the first intermediate component can rotate relative to the second intermediate component with the first axis L1 as the rotation center. In addition, in the above-described embodiment, the optical unit 1 can also be installed in various devices other than portable devices.

Claims

1. An optical unit with a shake correction function, characterized in that: have: a movable body having a camera module; an intermediate member that rotatably holds the movable body; a fixing body that rotatably holds the intermediate component; a first magnetic drive mechanism and a second magnetic drive mechanism, wherein the first magnetic drive mechanism and the second magnetic drive mechanism are configured to rotate the movable body relative to the fixed body in such a manner that the optical axis of the camera module is tilted in any direction; as well as a first wiring substrate and a second wiring substrate, wherein at least a portion of the first wiring substrate and the second wiring substrate is formed of a flexible printed circuit board; The first magnetic drive mechanism includes a first drive magnet and a first drive coil, wherein the first drive magnet and the first drive coil are arranged to face each other in a first direction orthogonal to the optical axis of the camera module when the optical axis of the camera module is located at a predetermined reference position. The second magnetic drive mechanism includes a second drive magnet and a second drive coil, wherein the second drive magnet and the second drive coil are arranged to face each other in a second direction orthogonal to the optical axis of the camera module and the first direction when the optical axis of the camera module is located at the reference position. The fixing body includes an intermediate member holding portion that rotatably holds the intermediate member. The first wiring substrate is led out from the camera module, The first drive coil and the second drive coil are mounted on the second wiring substrate. The first wiring substrate includes a first strip portion formed in an elongated strip shape and a first connection portion for electrically connecting the first wiring substrate and the second wiring substrate. The second wiring substrate includes a second strip portion formed in an elongated strip shape and a second connection portion for electrically connecting the first wiring substrate and the second wiring substrate. The first wiring substrate or the second wiring substrate includes a lead portion extending toward the outer periphery of the fixed body. When the optical axis of the camera module is at the reference position, the outer shape of the intermediate component holding portion is a square or rectangular shape when viewed from the optical axis direction, which is the direction of the optical axis of the camera module, and four sides constituting the outer peripheral surface of the intermediate component holding portion are parallel to the first direction or the second direction. When one of the two sides of the intermediate member holding portion parallel to the first direction is set as a first side, the other of the two sides of the intermediate member holding portion parallel to the first direction is set as a second side, one of the two sides of the intermediate member holding portion parallel to the second direction is set as a third side, and the other of the two sides of the intermediate member holding portion parallel to the second direction is set as a fourth side, When the optical axis of the camera module is located at the reference position, the optical axis direction is parallel to the width direction of the first strip-shaped portion, and the first strip-shaped portion passes along the first side and the third side. When the optical axis of the camera module is located at the reference position, the optical axis direction is parallel to the width direction of the second strip-shaped portion, and the second strip-shaped portion passes along the second side and the fourth side. The first connection portion and the second connection portion are electrically connected to each other in a state of overlapping with each other in the second direction on the first side or the second side, or are electrically connected to each other in a state of overlapping with each other in the first direction on the third side or the fourth side.

2. The optical unit with a shake correction function according to claim 1, wherein: The first strip-shaped portion and the second strip-shaped portion are formed of flexible printed circuit boards.

3. The optical unit with a shake correction function according to claim 1 or 2, characterized in that: The first wiring substrate includes the lead portion. The lead portion is led out from the center of the first side toward one side in the second direction, The first connection portion and the second connection portion are electrically connected to each other in an overlapping state on the first side of the first side closer to the lead portion in the first direction.

4. The optical unit with a shake correction function according to claim 3, wherein: The first wiring substrate includes a connecting portion connecting an end portion of the first strip portion, an end portion of the first connecting portion, and an end portion of the lead portion. The connecting portion is fixed to the intermediate member holding portion on the first side.

5. The optical unit with a shake correction function according to any one of claims 1 to 4, wherein: The first connection portion and the second connection portion are electrically connected in a mutually overlapping state on the first side. The second connection portion is arranged closer to the intermediate member holding portion than the first connection portion in the second direction. The second connection portion has higher rigidity than the first connection portion.

6. The optical unit with a shake correction function according to any one of claims 1 to 5, wherein: The first connection portion is formed of a flexible printed circuit board having a single layer of a wiring pattern formed on only one surface.

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