CN117241124A - Optical unit with jitter correction function - Google Patents

Abstract

The invention provides an optical unit with a shake correction function, which can easily perform fixing operation of a wiring substrate led out from a movable body to a fixed body. In the optical unit with the shake correction function, a wiring board (10) led out from a movable body (3) is provided with: a module extraction unit (31 d) which is extracted from the camera module (2); a coil connection part (30 a) for connecting the driving coil; a movable-side fixed part (30 b) fixed to a holder (15) of the movable body (3); a fixed-side fixed part (30 c) fixed on the fixed body; and a band-shaped portion (30 d) connecting the movable-side fixed portion (30 b) and the fixed-side fixed portion (30 c). The module lead-out part (31 d) and the coil connection part (30 a) are connected with a movable side fixed part (30 b) fixed on the retainer (15).

Description

Optical unit with jitter correction function

Technical Field

The present invention relates to an optical unit with a shake correction function for a small-sized camera.

Background

Conventionally, an optical unit with a shake correction function mounted on a portable device or the like is known (for example, refer to patent document 1). The optical unit with a shake correction function described in patent document 1 includes: a movable body (movable module) having a camera module (optical module); a fixed body which holds the movable body via a gimbal mechanism so as to be swingable; a shake correction drive mechanism having a drive magnet and a drive coil and configured to oscillate a movable body relative to a fixed body; a module flexible printed board for supplying power to the camera module; and a coil flexible printed board for supplying power to the driving coil.

In the optical unit with the shake correction function described in patent document 1, the movable body includes a frame to which the camera module is fixed. The fixing body is provided with; a case surrounding an outer peripheral side of the movable body; and a first bottom plate covering the bottom surface of the housing. The driving magnet is held by the housing of the fixed body, and the driving coil is held by the frame of the movable body. The flexible printed board for the coil and the flexible printed board for the module are led out from the movable body.

In the optical unit with the shake correction function described in patent document 1, a flexible printed circuit board for a coil includes: a rectangular frame portion connected to the driving coil; and a band-shaped winding portion led out from the rectangular frame portion. The rectangular frame portion is fixed to the frame of the movable body. A part of the winding part is fixed on the first bottom plate of the fixed body. The flexible printed circuit board for the module is provided with a lead-out portion led out from the camera module. A part of the winding part is fixed on the first bottom plate.

Prior art literature

Patent literature

Patent document 1: international publication No. 2015/045791 specification

Disclosure of Invention

In the optical unit with the shake correction function described in patent document 1, since the initial tilt of the movable body with respect to the fixed body (that is, the tilt of the optical axis of the camera module with respect to the fixed body when no current is supplied to the driving coil) varies according to the method of winding the winding portion of the flexible printed circuit board for the coil that is drawn out from the movable body, the initial tilt of the movable body with respect to the fixed body varies according to the winding portion of the flexible printed circuit board for the coil to the fixed position of the first chassis. In the optical unit with the shake correction function, since the initial tilt of the movable body with respect to the fixed body also varies according to the method of guiding the flexible printed circuit board for module that is pulled out from the movable body, the initial tilt of the movable body with respect to the fixed body also varies according to the position of the flexible printed circuit board for module that is fixed to the first chassis.

Therefore, in the optical unit with the shake correction function described in patent document 1, when fixing the two lead portions of the flexible printed circuit board led out from the movable body to the fixed body, in order to make the inclination of the movable body relative to the fixed body fall within a predetermined specification, it is necessary to fix the two lead portions to the fixed body while adjusting the fixing positions of the lead portions of the flexible printed circuit board for the coil and the fixing positions of the lead portions of the flexible printed circuit board for the module. Therefore, in the optical unit with the shake correction function, the fixing work of the flexible printed board pulled out from the movable body to the fixed body becomes complicated.

Accordingly, an object of the present invention is to provide an optical unit with a shake correction function, which includes: a movable body having a camera module; a fixed body which holds the movable body rotatably; and a wiring board that is drawn out from the movable body, wherein the optical unit with the shake correction function can easily perform fixing work of the wiring board that is drawn out from the movable body to the fixed body.

In order to solve the above problems, an optical unit with a shake correction function according to the present invention includes: a movable body having a camera module; a fixed body which holds the movable body rotatably; a magnetic driving mechanism for rotating the movable body relative to the fixed body to tilt the optical axis of the camera module in any direction; and a wiring board that is led out from a movable body, wherein the movable body is provided with a holder for fixing the camera module, and the magnetic driving mechanism is provided with: a driving magnet fixed to the fixed body; and a driving coil disposed opposite to the driving magnet and fixed to the holder, wherein the wiring board comprises: a module extraction unit which extracts from the camera module; a coil connection part for connecting the driving coil; a movable side fixed part fixed on the retainer; a fixed side fixed part fixed on the fixed body; and a belt-shaped portion connecting the movable-side fixed portion and the fixed-side fixed portion, the belt-shaped portion being constituted by a flexible printed board, the module lead-out portion and the coil connecting portion being connected to the movable-side fixed portion.

In the optical unit with a shake correction function according to the present invention, the wiring board led out from the movable body includes: a module extraction unit which extracts from the camera module; a coil connection part for connecting the driving coil; a movable side fixed part of the retainer fixed to the movable body; a fixed side fixed part fixed on the fixed body; and a belt-shaped portion connecting the movable-side fixed portion and the fixed-side fixed portion. In the present invention, the module lead portion and the coil connecting portion are connected to the movable side fixed portion fixed to the holder. Therefore, in the present invention, the initial inclination of the movable body with respect to the fixed body is affected by the winding of the belt-like portion.

Therefore, in the present invention, by adjusting the fixing position of the fixed portion on the fixed side with respect to the fixed body, the initial inclination of the movable body with respect to the fixed body can be adjusted. As a result, in the present invention, the fixed-side fixed portion can be fixed to the fixed body while adjusting only the fixing position of the fixed-side fixed portion so that the inclination of the movable body with respect to the fixed body falls within the predetermined specification. Therefore, in the present invention, the fixing work of the wiring board led out from the movable body to the fixed body can be easily performed.

In the present invention, since the belt-shaped portion of the wiring board is not repeatedly pulled out of the movable body with other wiring boards, it is possible to eliminate the waste of the wiring board and reduce the cost of the optical unit with the shake correction function, compared with the case where the winding portions of two flexible printed boards are repeatedly pulled out of the movable body as in the optical unit with the shake correction function described in patent document 1.

In the present invention, the movable-side fixed portion is preferably formed of a rigid substrate or a flexible printed board and fixed to a flat reinforcing plate. With this configuration, the state of the movable-side fixed portion fixed to the holder can be stabilized as compared with the case where the movable-side fixed portion is made of a flexible printed board and is not fixed to the reinforcing plate. Therefore, the state of the module lead-out portion and the coil connecting portion connected to the movable-side fixed portion can be stabilized.

In the present invention, the wiring board preferably includes: a first connector mounted to the movable-side fixed portion; and a second connector mounted to the module lead-out portion and connected to the first connector. With this configuration, after the movable-side fixed portion is fixed to the holder and the fixed-side fixed portion is fixed to the fixed body to determine the winding of the belt-like portion, the camera module can be fixed to the holder and the module lead-out portion can be connected to the movable-side fixed portion. Therefore, the degree of freedom in the assembly process of the optical unit with the shake correction function can be improved.

In addition, in the present invention, since the movable-side fixed portion is fixed to the holder, after the movable-side fixed portion is fixed to the holder and the fixed-side fixed portion is fixed to the fixed body to determine the winding of the belt-shaped portion, even if the camera module is fixed to the holder and the module lead-out portion is connected to the movable-side fixed portion, it is possible to prevent the initial tilt of the movable body relative to the fixed body from varying due to the influence of the wiring board. Therefore, even in a state where the camera module is not fixed to the holder and the module lead-out portion is not connected to the movable-side fixed portion, the fixed-side fixed portion can be fixed to the fixed body so that the inclination of the movable body with respect to the fixed body falls within a predetermined specification.

In the present invention, when one side in the optical axis direction of the camera module, that is, the optical axis direction, is set as the object side and the opposite side of the object side is set as the object opposite side, for example, the movable-side fixed portion is arranged such that the thickness direction of the movable-side fixed portion coincides with the optical axis direction, the first connector is attached to the surface of the movable-side fixed portion on the opposite side of the object side, and the second connector is attached to the surface of the module lead-out portion on the object side. In this case, the camera module is mounted on the holder from the opposite side of the object of the holder.

In the present invention, for example, the coil connection portion is constituted by a flexible printed board.

As described above, in the optical unit with a shake correction function according to the present invention, the fixing operation of the wiring board led out from the movable body to the fixed body can be easily performed.

Drawings

Fig. 1 is a perspective view of an optical unit with a shake correction function according to an embodiment of the present invention.

Fig. 2 is an exploded perspective view of the optical unit with a shake correction function shown in fig. 1.

Fig. 3 is a plan view showing a state in which a housing is removed from the optical unit with a shake correction function shown in fig. 1.

Fig. 4 is a perspective view showing the movable body, the wiring board, and the like shown in fig. 1, drawn out from different directions.

Fig. 5 is an exploded perspective view of the camera module and the wiring board shown in fig. 4.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(integral Structure of optical Unit with shake correction function)

Fig. 1 is a perspective view of an optical unit 1 with a shake correction function according to an embodiment of the present invention. Fig. 2 is an exploded perspective view of the optical unit 1 with a shake correction function shown in fig. 1. Fig. 3 is a plan view of the optical unit 1 with the shake correction function shown in fig. 1 with the housing 17 removed.

In the following description, as shown in fig. 1, three directions orthogonal to each other are respectively an X direction, a Y direction, and a Z direction, the X direction is a left-right direction, the Y direction is a front-rear direction, and the Z direction is an up-down direction. The X1 direction side of fig. 1 and the like, which are one side in the left-right direction, the X2 direction side of fig. 1 and the like, which are the opposite sides thereof, are the "left" side, the Y1 direction side of fig. 1 and the like, which are one side in the front-rear direction, is the "front" side, the Y2 direction side of fig. 1 and the like, which are the opposite sides thereof, is the "rear" side, the Z1 direction side of fig. 1 and the like, which are the one side in the up-down direction, is the "up" side, and the Z2 direction side of fig. 1 and the like, which are the opposite sides thereof, is the "down" side.

The optical unit 1 with a shake correction function (hereinafter referred to as "optical unit 1") according to the present embodiment is a small-sized unit used in a small-sized camera such as a personal camera (body camera), and includes a camera module 2, and the camera module 2 includes a lens for photographing and an imaging element. The optical unit 1 has a shake correction function for avoiding disturbance of an image captured when shake occurs during shooting.

The optical unit 1 includes: a movable body 3 having a camera module 2; an intermediate member 4 rotatably holding the movable body 3; and a fixing body 5 (refer to fig. 1) rotatably holding the intermediate member 4. The movable body 3 is rotatable relative to the intermediate member 4 with respect to a first intersecting direction (V direction in fig. 3) intersecting the optical axis L of the camera module 2 as an axial direction of rotation. That is, the movable body 3 is rotatable with respect to the intermediate member 4 about a first axis L1 (see fig. 3) having the first intersecting direction as an axis direction. The first intersecting direction of the present embodiment is orthogonal to the optical axis L.

The intermediate member 4 is rotatable relative to the fixed body 5 with respect to a second intersecting direction (W direction in fig. 3) intersecting the first intersecting direction and intersecting the optical axis L of the camera module 2 as an axial direction of rotation. That is, the intermediate member 4 can rotate with respect to the fixed body 5 about a second axis L2 (see fig. 3) having the second intersecting direction as an axis direction. In the present embodiment, the second intersecting direction is orthogonal to the first intersecting direction. Thus, a 2-axis gimbal mechanism is formed between the movable body 3 and the fixed body 5.

In the present embodiment, when no current is supplied to the driving coils 25 and 27 described later, the movable body 3 and the intermediate member 4 are disposed at predetermined reference positions, and the camera module 2 is disposed at the predetermined reference positions. When the camera module 2 is positioned at the reference position, the direction of the optical axis L of the camera module 2, that is, the optical axis direction coincides in design with the up-down direction. In addition, the inclination of the optical axis L of the camera module 2 with respect to the up-down direction at the time of shake correction is small. Therefore, the optical axis direction of the camera module 2 substantially coincides with the up-down direction.

When the movable body 3 is disposed at a predetermined reference position, the second intersecting direction (W direction) is orthogonal to the optical axis L. That is, when the movable body 3 is disposed at a predetermined reference position without rotating relative to the intermediate member 4, the second intersecting direction is orthogonal 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 does not intersect at right angles. The second intersecting direction (W direction) is a direction offset by about 45 ° from the front-rear direction in the clockwise direction of fig. 3 when viewed from the upper side.

The optical unit 1 includes magnetic drive mechanisms 8 and 9 for rotating the movable body 3 relative to the fixed body 5 so as to tilt the optical axis L of the camera module 2 in an arbitrary direction (see fig. 3). The optical unit 1 further includes a wiring board 10 led out from the movable body 3. First fulcrum portions 12 serving as fulcrums for rotating the movable body 3 with respect to the intermediate member 4 are disposed at both end portions in the first intersecting direction of the intermediate member 4. Second fulcrum portions 13 serving as fulcrums for rotation of the intermediate member 4 with respect to the fixed body 5 are arranged at both end portions in the second intersecting direction of the intermediate member 4.

The movable body 3 includes: a holder 15 for fixing the camera module 2; and a balancer 16 for adjusting the position of the center of gravity of the movable body 3. The holder 15 is formed of a resin material. The holder 15 includes: a cylindrical portion 15a formed in a cylindrical shape; and an outer peripheral wall portion 15b disposed on the outer peripheral side of the tube portion 15 a. The balancer 16 is formed of a metal material such as stainless steel. The balancer 16 is formed by rolling an elongated rectangular metal plate into a circular shape in the longitudinal direction of the metal plate. The balancer 16 is fixed to the upper end side of the cylindrical portion 15a of the holder 15.

The camera module 2 is fixed to the inner peripheral surface of the cylindrical portion 15a so that the outer peripheral side of a part of the camera module 2 is covered with the holder 15. The upper end of the camera module 2 is disposed above the upper end of the tube 15 a. The lower end of the camera module 2 is disposed below the lower end of the holder 15. At the lower end of the camera module 2, a plurality of protrusions 2a protruding toward the lower side are formed. For example, four protrusions 2a are formed at the lower end portion of the camera module 2.

As described above, the camera module 2 includes a lens and an imaging element. The imaging element is disposed at the lower end side of the camera module 2, and an object disposed at the upper side of the camera module 2 is imaged by the camera module 2. As described above, the inclination of the optical axis L of the camera module 2 with respect to the vertical direction at the time of shake correction is small, and the optical axis direction of the camera module 2 substantially coincides with the vertical direction. Therefore, if one side of the camera module 2 in the optical axis direction (specifically, the side on which the object is arranged in the optical axis direction of the camera module 2) is the object side, and the opposite side of the object side (specifically, the side on which the image pickup element is arranged in the optical axis direction of the camera module 2) is the object opposite side, the object side substantially coincides with the upper side, and the object opposite side substantially coincides with the lower side.

The intermediate member 4 is formed of a metal material such as stainless steel. The intermediate member 4 is formed in an octagonal frame shape. The intermediate member 4 is disposed on the outer peripheral side of the cylindrical portion 15a and on the inner peripheral side of the outer peripheral wall portion 15b of the holder 15.

The fixed body 5 rotatably holds the movable body 3 via the intermediate member 4. The fixing body 5 includes: a case 17 covering the holder 15 from the outer peripheral side; and a cover 18 fixed to the housing 17. The housing 17 is formed of a resin material. The intermediate member 4 is rotatably held on the housing 17. The housing 17 is constituted by a cylindrical tube portion 17a covering the holder 15 from the outer peripheral side and an upper surface portion 17b constituting the upper surface of the housing 17.

The upper surface portion 17b constitutes the upper surface of the optical unit 1. The upper surface portion 17b is connected to the upper end of the tube portion 17a. A circular through hole is formed in the upper surface portion 17 b. In the through hole, an upper end portion of the camera module 2 is disposed. The upper surface portion 17b covers the driving mechanisms 8, 9, the first fulcrum portion 12, the second fulcrum portion 13, and the like from above. A cutout 17c for guiding the wiring board 10 is formed at the right front side portion of the cylindrical portion 17a. A board fixing portion 17d is formed at the left front side portion of the cylindrical portion 17a, and a fixing-side fixed portion 30c, which is a part of the wiring board 10 and is described later, is fixed to the board fixing portion 17d.

The cover 18 is formed of a metallic material. The cover 18 constitutes the lower surface and the side surfaces of the optical unit 1. The cover 18 is composed of a flat bottom 18a disposed below the cylindrical portion 17a of the housing 17, and a cylindrical portion 18b rising upward from the bottom 18 a. The bottom 18a is arranged such that the thickness direction of the bottom 18a coincides with the up-down direction. The upper surface of the bottom 18a contacts the lower end surface of the cylindrical portion 17a. The cylindrical portion 18b covers the cylindrical portion 17a of the housing 17 from the outer peripheral side. The upper end of the cylindrical portion 18b is in contact with the lower surface of the upper surface portion 17b of the housing 17. A cutout 18c is formed in the tube portion 18b, and the cutout 18c is used to dispose the board fixing portion 17d of the housing 17 and to draw out the wiring board 10 to the outer peripheral side of the optical unit 1.

The first fulcrum portion 12 includes: a leaf spring 20 fixed to the holder 15; and balls 21 (see fig. 2) fixed to both ends of the intermediate member 4 in the first intersecting direction. The leaf spring 20 is composed of a fixed portion 20a fixed to the holder 15 and a spring portion 20b connected to the fixed portion 20 a. The fixed portion 20a is fixed to the inner peripheral side of the outer peripheral wall portion 15b of the holder 15. The spring portion 20b is disposed inside the fixed portion 20a in the first intersecting direction, and is disposed outside the sphere 21. The spring portion 20b is formed with a recess in which a part of the ball 21 is disposed. The concave portion is recessed toward the outside in the first intersecting direction. The ball 21 contacts the bottom surface of the concave portion of the spring portion 20b from the inside in the first intersecting direction with a predetermined contact pressure by the elasticity of the spring portion 20 b.

The second fulcrum portion 13 includes: a leaf spring 22 fixed to the housing 17; and balls 23 (see fig. 2) fixed to both ends of the intermediate member 4 in the second intersecting direction. The leaf spring 22 is composed of a fixed portion 22a fixed to the housing 17 and a spring portion 22b connected to the fixed portion 22 a. The fixed portion 22a is fixed to the inner peripheral side of the tube portion 17a of the housing 17. The spring portion 22b is disposed inside the fixed portion 22a in the second intersecting direction, and is disposed outside the sphere 23. A recess in which a part of the ball 23 is disposed is formed in the spring portion 22 b. The concave portion is recessed toward the outside in the second intersecting direction. The ball 23 contacts the bottom surface of the concave portion of the spring portion 22b from the inside in the second intersecting direction with a predetermined contact pressure by the elasticity of the spring portion 22 b.

The magnetic drive mechanism 8 includes a drive magnet 24 and a drive coil 25 arranged to face each other in the left-right direction. The magnetic drive mechanism 9 includes a drive magnet 26 and a drive coil 27 disposed to face each other in the front-rear direction. The driving magnets 24 and 26 are formed in a rectangular flat plate shape. The driving magnets 24 and 26 are fixed to the fixed body 5. The driving coils 25 and 27 are, for example, air coils formed by winding a wire into an air-core shape. The driving coils 25 and 27 are fixed to the movable body 3.

The driving magnet 24 is fixed to the inner peripheral surface of the cylindrical portion 17a of the housing 17. The driving coil 25 is fixed to the outer surface of the outer peripheral wall portion 15b of the holder 15. In the present embodiment, the driving magnet 24 and the driving coil 25 are disposed opposite to each other on both sides of the holder 15 in the left-right direction. The magnetic drive mechanism 8 rotates the movable body 3 relative to the fixed body 5 about an axis line orthogonal to the optical axis L of the camera module 2 and parallel to the front-rear direction as a rotation center.

The driving magnet 26 is fixed to the inner peripheral surface of the cylindrical portion 17a of the housing 17. The driving coil 27 is fixed to the outer surface of the outer peripheral wall portion 15b of the holder 15. In the present embodiment, the driving magnet 26 and the driving coil 27 are disposed opposite to each other on both sides of the holder 15 in the front-rear direction. The magnetic drive mechanism 9 rotates the movable body 3 relative to the fixed body 5 about an axis line orthogonal to the optical axis L of the camera module 2 and parallel to the left-right direction as a rotation center.

In the optical unit 1, when the tilt change of the movable body 3 is detected by a predetermined detection means for detecting the tilt change of the movable body 3, a current is supplied to at least one of the driving coil 25 and the driving coil 27 based on the detection result of the detection means, and the shake is corrected. The magnetic driving mechanisms 8 and 9 rotate the movable body 3 with respect to the fixed body 5 about at least one of the first axis L1 and the second axis L2 as a rotation center. In the present embodiment, the lower end of the projection 2a of the camera module 2 is in contact with the upper surface of the bottom 18a of the cover 18, so that the rotation range of the movable body 3 with respect to the fixed body 5 and the movement range of the movable body 3 in the optical axis direction of the camera module 2 are limited.

(Structure of Wiring Board and routing)

Fig. 4 is a perspective view showing the movable body 3, the wiring board 10, and the like shown in fig. 1, drawn out from different directions. Fig. 5 is an exploded perspective view of the camera module 2 and the wiring board 10 shown in fig. 4.

The wiring board 10 is composed of a first wiring board 30 on which the driving coils 25 and 27 are mounted, and a second wiring board 31 led out from the camera module 2. The first wiring board 30 and the second wiring board 31 are formed separately. The first wiring board 30 and the second wiring board 31 are connected by a connector 32 (see fig. 5) as a first connector mounted on the first wiring board 30 and a connector 33 (see fig. 2) as a second connector mounted on the second wiring board 31 and connected to the connector 32. That is, the wiring board 10 includes connectors 32 and 33. Either one of the connector 32 and the connector 33 is a male connector, and the other one of the connector 32 and the connector 33 is a female connector.

The first wiring board 30 is a rigid flexible board formed by integrating a flexible printed board and a rigid board. The first wiring board 30 includes: a coil connection portion 30a for connecting the driving coils 25 and 27; a movable-side fixed portion 30b fixed to the holder 15; a fixed-side fixed portion 30c fixed to the housing 17; a belt-shaped portion 30d connecting the movable-side fixed portion 30b and the fixed-side fixed portion 30c; and a lead portion 30e led out to the outer peripheral side of the fixed body 5.

The first wiring board 30 of the present embodiment is constituted by four coil connecting portions 30a, one movable-side fixed portion 30b, one fixed-side fixed portion 30c, one belt-like portion 30d, and one lead-out portion 30e. The coil connecting portion 30a, the movable-side fixed portion 30b, the fixed-side fixed portion 30c, the band portion 30d, and the lead portion 30e are integrally formed. The coil connection portion 30a is formed of a flexible printed board. The driving coils 25 and 27 are mounted on the coil connecting portion 30a. The coil connecting portion 30a is fixed to the outer surface of the outer peripheral wall portion 15b of the holder 15.

The movable-side fixed portion 30b is formed of a rigid substrate. The movable-side fixed portion 30b is formed in a ring shape and a flat plate shape. The movable-side fixed portion 30b is fixed to a surface (lower surface) of the holder 15 opposite to the subject. For example, the movable-side fixed portion 30b is adhered to the surface of the holder 15 opposite to the subject with an adhesive. The surface of the holder 15 on the opposite side of the object is a plane orthogonal to the optical axis direction of the camera module 2, and the movable-side fixed portion 30b is disposed such that the thickness direction of the movable-side fixed portion 30b coincides with the optical axis direction of the camera module 2. The movable-side fixed portion 30b is sandwiched between the lower end portion of the camera module 2 and the holder 15 in the optical axis direction of the camera module 2.

The coil connecting portion 30a is connected to the movable-side fixed portion 30b. Specifically, the coil connecting portion 30a is connected to four total portions of two portions of both ends of the movable-side fixed portion 30b in the lateral direction and two portions of both ends of the movable-side fixed portion 30b in the front-rear direction. A connector 32 is attached to the movable-side fixed portion 30b. Specifically, the connector 32 is attached to the surface of the movable-side fixed portion 30b on the opposite side of the subject. More specifically, the connector 32 is attached to a right front side portion that is a portion on one side in the first intersecting direction of the surface on the opposite side of the object of the movable side fixed portion 30b.

The fixed-side fixed portion 30c is formed of a rigid substrate. The fixed-side fixed portion 30c is formed in a rectangular flat plate shape. The fixed-side fixed portion 30c is fixed to the substrate fixing portion 17d of the housing 17. The fixed-side fixed portion 30c is disposed such that the thickness direction of the fixed-side fixed portion 30c coincides with the second intersecting direction. The lead portion 30e is formed of a flexible printed board. The lead portion 30e is formed in a slender strip shape having a width direction corresponding to the first intersecting direction. The lead portion 30e is connected to the lower end of the fixed-side fixed portion 30 c. The lead portion 30e extends from the lower end of the fixed-side fixed portion 30c to the left front side. A part of the lead portion 30e is disposed in the cutout 18c of the cover 18.

The band portion 30d is formed of a flexible printed board. The band portion 30d is formed in an elongated band shape. The belt portion 30d is led out from the movable-side fixed portion 30b. The belt-shaped portion 30d is led out from the movable-side fixed portion 30b to the right front side as one side in the first intersecting direction, is led to the left front side as one side in the second intersecting direction, and is led to the left rear side as the other side in the first intersecting direction. The band portion 30d is wound around the inner peripheral surface of the tube portion 18b of the cover 18. The band portion 30d is not fixed to either the movable body 3 or the fixed body 5.

The band portion 30d is constituted by a first band portion 30f having one end connected to the movable-side fixed portion 30b, a second band portion 30g having one end connected to the other end of the first band portion 30f, and a third band portion 30h having one end connected to the other end of the second band portion 30 g. The first band portion 30f is arranged such that the thickness direction of the first band portion 30f substantially coincides with the optical axis direction of the camera module 2. The first band portion 30f extends from the movable-side fixed portion 30b to the right front side. A part of the first band portion 30f is disposed in the cutout 17c of the housing 17. At the boundary between the first band portion 30f and the second band portion 30g, the band portion 30d is bent toward the upper side by 90 °. At the boundary between the first band portion 30f and the second band portion 30g, a thin L-shaped reinforcing plate 35 for maintaining the shape of the band portion 30d is fixed.

The second belt-like portion 30g is arranged such that the thickness direction of the second belt-like portion 30g substantially coincides with the first intersecting direction. The second band portion 30g extends from the first band portion 30f to the left front side. At the boundary between the second belt-shaped portion 30g and the third belt-shaped portion 30h, the belt-shaped portion 30d is bent 90 ° toward the left rear side. A reinforcing plate 35 for maintaining the shape of the band portion 30d is fixed to the boundary between the second band portion 30g and the third band portion 30 h. The third strip-shaped portion 30h is arranged such that the thickness direction of the third strip-shaped portion 30h substantially coincides with the second intersecting direction. The third band portion 30h extends from the second band portion 30g to the left rear side.

The third band portion 30h is connected to the right front side portion of the fixed-side fixed portion 30 c.

The second wiring substrate 31 is a rigid flexible substrate. The second wiring board 31 is constituted by an image pickup element mounting portion 31a on which the image pickup element of the camera module 2 is mounted, a lead-out portion 31b having one end connected to the image pickup element mounting portion 31a, and a connected portion 31c connected to the other end side of the lead-out portion 31 b. The imaging element mounting portion 31a and the connected portion 31c are formed of a rigid substrate. The lead portion 31b is formed of a flexible printed board. The imaging element mounting portion 31a is fixed to the lower end portion of the camera module 2. The image pickup element mounting portion 31a is disposed such that the thickness direction of the image pickup element mounting portion 31a coincides with the optical axis direction of the camera module 2. The image pickup element is mounted on the object-side surface of the image pickup element mounting portion 31 a.

The lead portion 31b is connected to a right front portion of the image pickup element mounting portion 31 a. The connected portion 31c is formed in a rectangular flat plate shape. The connected portion 31c is connected to the right front end portion of the lead portion 31 b. The connected portion 31c is disposed such that the thickness direction of the connected portion 31c substantially coincides with the optical axis direction of the camera module 2. The connected portion 31c overlaps with a right front side portion of the movable side fixed portion 30b in the optical axis direction of the camera module 2. The connected portion 31c is disposed on the opposite side of the subject from the right front portion of the movable-side fixed portion 30b.

In the present embodiment, a module lead-out portion 31d led out from the camera module 2 is constituted by the lead-out portion 31b and the connected portion 31 c. The connector 33 is mounted on the object-side surface of the connected portion 31 c. That is, the connector 33 is mounted on the object-side surface of the module drawing portion 31d. The module lead portion 31d is connected to the movable-side fixed portion 30b. Specifically, the connected portion 31c of the module lead portion 31d is connected to the movable-side fixed portion 30b via the connectors 32 and 33.

When the optical unit 1 is assembled, first, components other than the camera module 2, the second wiring board 31, and the cover 18 are assembled. Then, the camera module 2 in a state where the second wiring board 31 is mounted is assembled. At this time, the camera module 2 is inserted from the object side opposite to the inner peripheral side of the cylindrical portion 15a of the holder 15 and the inner peripheral side of the movable side fixed portion 30b. The connector 32 and the connector 33 are connected to each other, and the module lead portion 31d is connected to the movable-side fixed portion 30b. Then, the cover 18 is attached to the housing 17 from the opposite side of the subject.

(main effects of the present embodiment)

As described above, in the present embodiment, the wiring board 10 led out from the movable body 3 includes: a module lead-out portion 31d led out from the camera module 2; a coil connection portion 30a for connecting the driving coils 25 and 27; a movable-side fixed portion 30b fixed to the holder 15; a fixed-side fixed portion 30c fixed to the housing 17; and a belt-shaped portion 30d connecting the movable-side fixed portion 30b and the fixed-side fixed portion 30 c. In the present embodiment, the module lead portion 31d and the coil connecting portion 30a are connected to the movable-side fixed portion 30b fixed to the holder 15. Therefore, in the present embodiment, the initial inclination of the movable body 3 with respect to the fixed body 5 is affected by the winding of the belt portion 30d.

Therefore, in the present embodiment, by adjusting the fixing position of the fixed-side fixed portion 30c with respect to the housing 17, the initial inclination of the movable body 3 with respect to the fixed body 5 can be adjusted. As a result, in the present embodiment, the fixed-side fixed portion 30c can be fixed to the housing 17 while only adjusting the fixing position of the fixed-side fixed portion 30c so that the inclination of the movable body 3 with respect to the fixed body 5 falls within the predetermined specification. Therefore, in the present embodiment, the fixing operation of the wiring board 10 led out from the movable body 3 to the fixed body 5 can be easily performed.

In the present embodiment, since the belt-shaped portion 30d is not repeatedly led out of the movable body 3 with other wiring boards, the waste of the wiring board 10 can be eliminated and the cost of the optical unit 1 can be reduced as compared with the case where the lead-around portions of two flexible printed boards are repeatedly led out of the movable body 3 as in the optical unit with the shake correction function described in patent document 1.

In the present embodiment, the module drawing portion 31d is connected to the movable-side fixed portion 30b via the connectors 32 and 33. Therefore, in the present embodiment, as described above, when the optical unit 1 is assembled, after components other than the camera module 2, the second wiring board 31, and the cover 18 are assembled, the camera module 2 in a state where the second wiring board 31 is mounted can be assembled and the module lead-out portion 31d can be connected to the movable-side fixed portion 30b. Therefore, in the present embodiment, the degree of freedom in the assembly process of the optical unit 1 can be improved.

In the present embodiment, since the movable-side fixed portion 30b is fixed to the holder 15, when the optical unit 1 is assembled, even if the camera module 2 in a state in which the second wiring board 31 is assembled and the module lead-out portion 31d is connected to the movable-side fixed portion 30b after the components other than the camera module 2, the second wiring board 31, and the cover 18 are assembled, it is possible to prevent the initial tilt of the movable body 3 with respect to the fixed body 5 from being changed by the influence of the wiring board 10. Therefore, in the present embodiment, even in a state where the camera module 2 is not fixed to the holder 15 and the module lead-out portion 31d is not connected to the movable-side fixed portion 30b, the fixed-side fixed portion 30c can be fixed to the housing 17 so that the inclination of the movable body 3 with respect to the fixed body 5 falls within a predetermined specification.

(other embodiments)

The above-described embodiments are examples of preferred embodiments of the present invention, but the present invention is not limited thereto, and various modifications and changes can be made without changing the gist of the present invention.

In the above embodiment, the movable-side fixed portion 30b may be formed of a flexible printed board. In this case, the movable-side fixed portion 30b is preferably fixed to a flat reinforcing plate. In this case, the reinforcing plate is formed of, for example, FR-4, glass epoxy resin, or the like, or a metal plate such as a stainless steel plate. The reinforcing plate is formed in an annular and flat plate shape corresponding to the shape of the movable-side fixed portion 30b. The movable-side fixed portion 30b is fixed to the surface (lower surface) of the reinforcing plate on the opposite side of the subject, and the reinforcing plate is fixed to the surface (lower surface) of the holder 15 on the opposite side of the subject.

As in the above embodiment, when the movable-side fixed portion 30b is formed of a rigid substrate or when the movable-side fixed portion 30b is fixed to a reinforcing plate, the state of being fixed to the movable-side fixed portion 30b of the holder 15 can be stabilized as compared with the case where the movable-side fixed portion 30b is formed of a flexible printed substrate and is not fixed to a reinforcing plate. Therefore, the state of the module lead-out portion 31d and the coil connecting portion 30a connected to the movable-side fixed portion 30b can be stabilized.

In the above embodiment, the connected portion 31c of the second wiring board 31 and the fixed-side fixed portion 30c of the first wiring board 30 may be formed of a flexible printed board. In this case, the connected portion 31c and the fixed-side fixed portion 30c may be fixed to a flat reinforcing plate.

In the above embodiment, the wiring board 10 may not include the connectors 32 and 33. In this case, for example, the connected portion 31c of the second wiring board 31 is connected to the movable side fixed portion 30b of the first wiring board 30 by soldering. In the above embodiment, the first wiring board 30 and the second wiring board 31 may be integrally formed.

In the above embodiment, the fixed body 5 may rotatably hold the movable body 3 by a leaf spring so as to tilt the optical axis L of the camera module 2 in an arbitrary direction. In this case, the leaf spring includes, for example: a movable-side fixed part fixed to the holder 15; a fixed portion fixed to a fixed side of the housing 17; and an arm portion connecting the fixed portion on the movable side and the fixed portion on the fixed side. In this case, the optical unit 1 may not include the intermediate member 4, the first supporting point portion 12, and the second supporting point portion 13.

Symbol description

1. Optical unit (optical unit with shake correction function)

2. Camera module

3. Movable body

5. Fixing body

8. 9 magnetic driving mechanism

10. Wiring board

15. Retainer

24. 26 magnet for driving

25. 27 coil for driving

30a coil connection

30b movable side fixed part

30c fixed side fixed part

30d band portion

31d module lead-out part

32. Connector (first connector)

33. Connector (second connector)

L optical axis.

Claims (5)

1. An optical unit with jitter correction function, characterized in that,

the device is provided with: a movable body having a camera module; a fixed body that rotatably holds the movable body; a magnetic driving mechanism for rotating the movable body with respect to the fixed body so as to tilt an optical axis of the camera module in an arbitrary direction; and a wiring board that is drawn out from the movable body,

the movable body is provided with a retainer for fixing the camera module,

the magnetic drive mechanism includes: a driving magnet fixed to the fixed body; and a driving coil disposed opposite to the driving magnet and fixed to the holder,

the wiring board is provided with: a module extraction unit which extracts from the camera module; a coil connection unit for connecting the driving coil; a movable side fixed part fixed to the holder; a fixed-side fixed part fixed to the fixed body; and a band-shaped portion connecting the movable-side fixed portion and the fixed-side fixed portion,

the band portion is constituted by a flexible printed substrate,

the module lead-out portion and the coil connecting portion are connected to the movable-side fixed portion.

2. The optical unit with shake correction function according to claim 1, wherein,

the movable-side fixed portion is formed of a rigid substrate or a flexible printed board and is fixed to a flat reinforcing plate.

3. The optical unit with shake correction function according to claim 2, wherein,

the wiring board is provided with: a first connector attached to the movable-side fixed portion; and a second connector mounted to the module lead-out portion and connected to the first connector.

4. An optical unit with a shake correction function according to claim 3,

when one side of the camera module in the direction of the optical axis, that is, in the optical axis direction is set as an object side and the opposite side of the object side is set as an object opposite side,

the movable-side fixed portion is arranged such that a thickness direction of the movable-side fixed portion coincides with the optical axis direction,

the first connector is mounted on a surface of the movable-side fixed portion opposite to the subject,

the second connector is attached to the object-side surface of the module extraction portion.

5. The optical unit with a shake correction function according to any one of claims 1 to 4,

the coil connection portion is formed of a flexible printed board.