JP2019200360A - Optical unit with shake correction function and manufacturing method therefor - Google Patents

Abstract

To provide an optical unit with a shake correction function and a manufacturing method for the same which can arrange a flexible wiring board at the correct position of a fixed body and, when fixing with adhesive tape, reduce its re-pasting work to a possible minimum.SOLUTION: The optical unit comprises: a movable body including an optical element and an imaging element; a fixed body enclosing the movable body; a swing support mechanism for swingably supporting the movable body to the fixed body; a drive mechanism for swing correction that oscillates the movable body in the fixed body; and a flexible wiring board connected to the imaging element in the movable body and led out to the outside of the fixed body. The fixed body is provided with a board support part in which a lengthwise middle position of the flexible wiring board is fixed in a placement state, and an index for position adjustment relative to the board support part is formed on the flexible wiring board.SELECTED DRAWING: Figure 11

Description

  The present invention relates to an optical unit with a shake correction function mounted on a portable terminal with a camera and the like, and a method for manufacturing the same.

  In an optical unit for photographing used in optical equipment such as an imaging device mounted on a portable terminal, a drive recorder, an unmanned helicopter, etc., an optical element or the like is used to cancel out the shake in order to suppress disturbance of the photographed image due to the shake. A function has been developed that corrects shake by moving the lens. In this shake correction function, a movable body including an optical element and an imaging element is movably supported with respect to a fixed body formed of a housing such as an optical device, and the movable body is subjected to shake by a shake correction drive mechanism. The structure to move is adopted.

  For example, Patent Document 1 discloses a configuration in which a gimbal mechanism is provided between a movable body having an optical element and an image sensor and a fixed body, and the movable body and the fixed body are supported by a plate spring. Further, in this optical unit with shake correction function, when connecting the movable body and the fixed body via the plate spring, the one end of the plate spring and the fixed body are fixed with an adhesive, Adjust the posture, and fix the other end of the plate spring to the movable body with an adhesive according to the position of the plate spring in this state, so that no excessive biasing force is generated on the plate spring. Yes.

Japanese Unexamined Patent Publication No. 2016-61956

By the way, in such an optical unit, a flexible wiring board for signal transmission and power feeding is connected to an imaging element in the movable body and a drive mechanism for swinging, and the flexible circuit board is pulled out of the fixed body. In this case, by fixing the intermediate position of the flexible wiring board to the fixed body, even if an external force acts on the flexible wiring board outside the fixed body, the flexible wiring board is assembled so as not to be transmitted to the movable body.
In general, an adhesive tape is used as means for fixing the flexible wiring board to the fixed body. After fixing the flexible wiring board with this adhesive tape, if it becomes necessary to readjust the fixing position, it is necessary to remove the adhesive tape and adjust the fixing position of the flexible wiring board, and then re-adhere. . When this adjustment operation is repeated, every time the adhesive tape is peeled off, an external force such as bending or an increase in local tension acts on the soft flexible wiring board, which may damage the flexible wiring board.
For this reason, before fixing with an adhesive tape, it is desirable to arrange | position a flexible wiring board in an exact position, and to avoid the re-adhesion work of an adhesive tape as much as possible.

  The present invention has been made in view of such circumstances, and the flexible wiring board can be arranged at an accurate position of a fixed body, and even when it is fixed with an adhesive tape, the re-working work is reduced as much as possible. An object of the present invention is to provide an optical unit with a shake correction function and a method for manufacturing the same.

  An optical unit with a shake correction function according to the present invention includes a movable body having an optical element and an imaging element, a fixed body surrounding the movable body, and a swing support for swingably supporting the movable body with respect to the fixed body. A fixed mechanism including a mechanism, a swing correction drive mechanism for swinging the movable body in the fixed body, and a flexible wiring board connected to the imaging element in the movable body and drawn out of the fixed body. The body is provided with a substrate support portion in which a midway position in the length direction of the flexible wiring substrate is fixed in a mounted state, and a position adjustment index for the substrate support portion is formed on the flexible wiring substrate.

  In this optical unit, when the flexible wiring board is placed on the board support part of the fixed body, the flexible wiring board can be placed on the board support part based on the position adjustment index of the flexible wiring board. Can be fixed in position.

In one embodiment of the optical unit with a shake correction function, a fixed side position adjustment index with respect to the flexible wiring board may be formed on the substrate support portion.
The flexible wiring board can be fixed with high accuracy by using both the fixed side position adjustment index of the substrate support section and the position adjustment index provided on the flexible wiring board.

In another embodiment of the optical unit with shake correction function, the position adjustment index in the flexible wiring board is formed on both sides of the flexible wiring board.
By adjusting the position using the position adjustment indicators on both sides of the flexible wiring board, the flexible wiring board can be fixed in parallel to the fixed body without causing twisting.

  According to still another embodiment of the optical unit with shake correction function, the position adjustment index includes a length direction position adjustment index and a width direction position adjustment index, and is provided on a side of the flexible wiring board. A convex portion extending in the surface direction is formed, and a first side along the length direction of the flexible wiring board and a second side along the width direction orthogonal to the length direction are formed on the convex portion, The length direction position adjustment index is formed on a side, and the width direction position adjustment index is formed on the second side.

  The position of the flexible wiring board can be adjusted in both the length direction and the width direction perpendicular thereto, and the position accuracy can be improved.

  In still another embodiment of the optical unit with shake correction function, the fixed side position adjustment index is formed on the substrate support portion along a pull-out direction in which the flexible wiring substrate is pulled out and a lateral direction perpendicular thereto. The reference side along the pull-out direction is arranged so as to overlap the second side of the flexible wiring board, and the reference side along the horizontal direction is the first side of the flexible wiring board It is arranged overlapping.

  Place the flexible wiring board on the board support part so that the first side or the second side of the flexible wiring board overlaps the two reference sides as the fixed side position adjustment index, and these reference sides and the flexible wiring board It is possible to accurately position with the position adjustment index.

In still another embodiment of the optical unit with shake correction function, a cover that covers the flexible wiring board on the substrate support portion is provided on the fixed body, and the cover on the substrate support portion is provided on the cover. A pressing portion having a cushion member for pressing the flexible wiring board is formed.
Since the flexible wiring board is protected by the cover and the pressing portion of the cover is in contact with the flexible wiring board by the cushion member, the fixing force can be increased while preventing damage to the flexible wiring board.

  The method of manufacturing an optical unit with a shake correction function according to the present invention includes a temporary assembly step in which the movable body is supported by the swing support mechanism in the fixed body, and the flexible wiring board is attached to the fixed body after the temporary assembly step. A positioning step of placing the movable body on the fixed body while placing on the substrate support portion and confirming the position relative to the substrate support portion with the position adjustment index, and after the positioning step, And a fixing step of fixing to the substrate support portion.

  According to the present invention, the flexible wiring board can be arranged at an accurate position of the fixed body, and even when the flexible wiring board is fixed with the adhesive tape, the reworking operation can be reduced as much as possible.

It is a perspective view which shows the external appearance of the optical unit with a shake correction function of one Embodiment of this invention. It is a front view of the optical unit with a shake correction function of one embodiment. It is a side view of the optical unit with a shake correction function of one embodiment. It is the perspective view which looked at the optical unit with a shake correction function of one embodiment from the object opposite side. It is the disassembled perspective view which looked at the optical unit with a shake correction function of one embodiment from the subject side. It is the disassembled perspective view which looked at main parts from the opposite side to a subject. It is the perspective view which looked at the cover frame and the gimbal mechanism from the opposite side to the subject. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2, and the optical axis direction is arranged vertically. It is arrow sectional drawing which follows the BB line of FIG. FIG. 5 is a perspective view of a state where a bottom cover is removed from FIG. 4. It is an enlarged view of the principal part of FIG. It is a schematic diagram which shows the modification of the parameter | index for position adjustment.

Hereinafter, embodiments of an optical unit with a shake correction function according to the present invention will be described with reference to the drawings.
In the following description, it is assumed that the three directions orthogonal to each other are the X-axis direction, the Y-axis direction, and the Z-axis direction, and the optical axis L (lens optical axis / optical axis of the optical element) is arranged in the Z-axis direction. . Further, among the shakes in each direction, rotation around the X axis corresponds to so-called pitching (pitch), and rotation around the Y axis corresponds to so-called yawing (roll). Also, + X is attached to one side in the X axis direction, -X is attached to the other side, + Y is attached to one side in the Y axis direction, -Y is attached to the other side, and Z axis One side of the direction (subject side / front side in the optical axis direction) is denoted by + Z, and the other side (opposite side of the subject side / back side in the optical axis direction) is denoted by -Z.

(Schematic configuration of the optical unit 101 with shake correction function)
1 to 4 show the external appearance of an assembled state of an optical unit with a shake correction function (hereinafter abbreviated as “optical unit”) 101. FIG. 5 is an exploded perspective view in which the optical unit 101 is disassembled along the optical axis L direction. 6 and 7 are exploded perspective views of the main part of the optical unit 101 as viewed in the opposite direction to FIG. FIG. 8 is a longitudinal sectional view in the YZ plane passing through the optical axis L of the optical unit 101. FIG. 9 is a cross-sectional view of the optical unit 101 in the vicinity of a later-described gimbal mechanism 30 and shake correction drive mechanism 40 on the XY plane.

  The optical unit 101 shown in FIGS. 1 to 4 is a thin camera incorporated in an optical device (not shown) such as an imaging device mounted on a portable terminal, a drive recorder, an unmanned helicopter, etc. It is mounted in a state supported by the main body. In this type of optical unit 101, when a shake such as a hand shake occurs in an optical device during shooting, a captured image is disturbed. Therefore, in the optical unit 101 of the present embodiment, the movable body 20 including the optical module (optical element and imaging element) 210 with the optical axis L extending along the Z-axis direction is used as a shake detection sensor such as a gyroscope. The pitching and yawing can be corrected by swinging based on the result of detecting the shake by (not shown).

  The optical unit 101 of the present embodiment is a fixed body 10, a movable body 20 including an optical module 210, and a swing support mechanism that allows the movable body 20 to be swingably supported with respect to the fixed body 10. A gimbal mechanism 30 and a shake correction drive mechanism 40 that swings the movable body 20 are provided. Further, as shown in FIG. 9, the movable body 20 is supported so as to be able to swing around the first axis R <b> 1 intersecting the optical axis L direction with respect to the fixed body 10 via the gimbal mechanism 30. It is supported so as to be swingable around a second axis R2 intersecting the axis L direction and the first axis R1 direction. In the optical unit 101, pitching and yawing are corrected by swinging the movable body 20 around two axes (first axis R1 and second axis R2) orthogonal to the optical axis L. .

  In the optical unit 101 of the present embodiment, the fixed body 10 has a square shape when viewed from the optical axis L direction (+ Z direction). As shown in FIG. 9, the first axis R1 and the second axis R2 are orthogonal to the optical axis L direction. The first axis R1 and the second axis R2 are orthogonal to each other and are arranged at an angle of 45 ° with respect to the X axis and the Y axis.

(Configuration of fixed body 10)
As shown in FIG. 1 to FIG. 4 and the like, the fixed body 10 is fixed to a rectangular tube-shaped first case 110 surrounding the movable body 20 and the first case 110 (one side in the Z-axis direction + Z). Cover frame 120, second case 130 disposed below first case 110 (the other end side in the Z-axis direction—Z), and bottom cover (cover of the present invention) 140 attached to second case 130. And have.
In this embodiment, the 1st case 110 is formed in the rectangular cylinder shape by the side-plate part 111 arrange | positioned at four directions. The cover frame 120 is formed in a rectangular frame shape projecting radially inward from the one side + Z end of the first case 110 in the Z-axis direction. As shown in FIG. 1 and the like, a circular opening window 121 is formed at the center of the cover frame 120, and light from the subject is guided to the optical module 210 through the opening window 121.

  Further, as shown in FIGS. 5, 6, etc., the second case 130 is formed in a rectangular box shape with its upper and lower parts opened, and the bottom plate part 131 is formed in a rectangular frame shape, so that the optical module 210 is formed. An opening 132 for drawing out the flexible wiring boards 71 and 72 connected to the outside is formed. A bottom cover 140 is attached to the bottom plate portion 131 so as to overlap the opening 132 from the other side -Z of the second case 130 in the Z-axis direction, and the flexible wiring board 71 drawn out from the opening 132 is provided. , 72 are pulled out from between the second case 130 and the bottom cover 140. The bottom cover 140 is provided with a plurality of leg portions 141 and 142 that come into contact with the bottom plate portion 131 and a pressing portion 143 that comes into contact with the flexible wiring boards 71 and 72 when the bottom cover 140 overlaps the bottom plate portion 131 of the second case 130. A sheet-like cushion member 144 is affixed to the holding portion 143 on the surface in contact with the flexible wiring boards 71 and 72.

  Further, as shown in FIG. 8 and the like, the fixed body 10 is a rectangle that defines a movable range from the first case 110 and the second case 130 to the other side −Z of the movable body 20 in the Z-axis direction. A frame plate-like stopper member 150 is provided. The stopper member 150 is held in a state of being sandwiched between the first case 110 and the second case 130 when the first case 110 and the second case 130 are stacked in the Z direction.

(Configuration of movable body 20)
5 and the like, the movable body 20 includes an optical module 210 including an optical element 211 such as a lens, a holder frame 220 that holds the optical module 210, and a holder frame 220 (one side in the Z-axis direction). And a cylindrical weight 230 as a gravity center position adjusting member fixed to + Z).
As shown in FIG. 8, the optical module 210 includes a lens holder 213 that holds the optical element 211, a sensor holder 214 that holds the imaging element 212, and the like, and the lens holder 213 and the sensor holder 214 are combined. The holder frame 220 is held in a state.

The holder frame 220 forms an outer peripheral portion of the movable body 20 as shown in FIGS. 5 and 8 and the like, and generally includes a cylindrical holder holding portion 221 that holds the optical module 210 inside, and this holder holding portion. And a thick base portion 222 that expands in a flange shape at the lower end portion (the other side in the Z-axis direction—the end portion of Z) of 221. A weight 230 is attached to the tip of the holder holding part 221 (one side in the Z-axis direction + the end of Z).
In addition, on the outer peripheral portion of the base portion 222, coil holding portions 223 that respectively hold four coils 42 constituting a shake correction driving mechanism 40 described later are provided on the outer side in the radial direction from the holder holding portion 221. As shown in FIG. 8, a movable frame arrangement space 240 in which a movable frame 310 of the gimbal mechanism 30 described later is arranged is formed between the coil holding unit 223 and the holder holding unit 221. The coil holding portion 223 is provided with a protruding portion 224 that protrudes further outward from the outer surface of the coil 42 (the surface facing the magnet 41) in a state where the coil 42 is held by the coil holding portion 223. 8 and 9, the protruding portion 224 faces the magnet 41. Therefore, when the movable body 20 is displaced in the X-axis direction or the Y-axis direction by an external force, the protruding portion 224 of the coil holding portion 223 comes into contact with the magnet 41 and prevents the coil 42 and the magnet 41 from contacting each other. Yes.
In the present embodiment, the holder frame 220 is made of synthetic resin, and the holder holding part 221, the base part 222, and the coil holding part 223 are integrally formed.

Further, the image sensor 212 and the like provided on the movable body 20 are connected to a flexible wiring board 71 for signal output (communication). The image sensor 212 is mounted on a mounting substrate 215 on which electronic components such as a gyroscope and a capacitor are mounted, and the flexible wiring substrate 71 described above is connected to the mounting substrate 215. The flexible wiring board 71 connected to the mounting board 215 is divided into two parts that are routed to the outside. On the other hand, the coil 42 constituting the shake correction drive mechanism 40 is connected to a flexible wiring board 72 for power supply. The flexible wiring substrate 72 is provided with a rectangular frame-shaped frame-shaped substrate portion 721 disposed on the other side -Z in the Z-axis direction of the holder frame 220 at the base end portion, and this frame-shaped substrate portion 721. The coils 42 of the shake correction drive mechanism 40 are connected to the main body.
And these flexible wiring boards 71 and 72 are electrically connected to the high-order control part etc. which were provided in the main body side of the optical apparatus.

  As shown in FIG. 8, the flexible wiring board 71 connected to the optical module 210 has a first curved portion 711 having a relatively small radius of curvature below the holder frame 220 (the other side in the Z-axis direction—Z) and The second bent portion 712 is bent twice. The vicinity of the end of the second bending portion 712 is between the spacer 261 fixed to the lower surface of the holder frame 220 together with the flexible wiring board 72 connected to the coil 42 and the clamp member 262 fixed to the spacer 261. And then, after being bent by the third bending portion 713 having a large curvature radius, it is pulled out. The flexible wiring board 72 connected to the coil 42 is also drawn out after being bent by the bending portion 722 having a large curvature radius.

In this case, as shown in FIG. 1 and the like, the flexible wiring board 72 connected to the coil 42 is disposed between the two divided portions of the flexible wiring board 71 connected to the optical module 210. The two flexible wiring boards 71 and 72 are aligned in the direction of leading to the outside. In addition, both the flexible wiring boards 71 and 72 are held in such a curved state, but the width direction is the same in any part in a state where no driving current flows through the shake correction driving mechanism 40. It is arranged in parallel with the direction, specifically the X-axis direction, and is held so as not to twist.
The flexible wiring boards 71 and 72 are both flexible and do not hinder the movement of the holder frame 220 and the optical module 210 held by the holder frame 220 by the shake correction drive mechanism 40. It is like that.

(Configuration of shake correction drive mechanism 40)
The shake correction drive mechanism 40 is a magnetic drive mechanism using a plate-like magnet 41 and a coil 42 that applies an electromagnetic force within the magnetic field of the magnet 41 as shown in FIGS. In the present embodiment, four combinations of the magnet 41 and the coil 42 are provided at intervals of 90 ° in the circumferential direction of the movable body 20 (holder frame 220). Further, each magnet 41 is held by the first case 110, and each coil 42 is held by the holder frame 220. In this embodiment, the shake correction drive mechanism 40 is provided between the first case 110 and the holder frame 220. Is configured.

  The magnets 41 are respectively held on the inner surfaces of the four side plate portions 111 arranged at intervals of 90 ° in the circumferential direction of the first case 110. Each side plate portion 111 is arranged on one side + X in the X axis direction, the other side −X, one side + X in the Y axis direction, and the other side −Y, respectively. Therefore, between the first case 110 and the holder frame 220, one side + X in the X-axis direction, the other side −X in the X-axis direction, one side + Y in the Y-axis direction, and the other side −Y in the Y-axis direction. In either case, the magnet 41 and the coil 42 are opposed to each other.

  In the present embodiment, the four magnets 41 are magnetized with different poles on the outer surface side and the inner surface side. The magnet 41 is magnetized separately in two in the optical axis L direction (Z-axis direction), so that the magnetic poles 411 and 412 positioned on the coil 42 side (inner surface side) are different in the optical axis L direction. (See FIGS. 5 and 8). Therefore, the magnetization polarization line 413 that separates both the magnetic poles 411 and 412 is disposed in parallel to the direction orthogonal to the optical axis L. The two magnets 41 arranged on the one side + X in the X-axis direction and the other side -X in the X-axis direction have magnetized polarization lines 413 arranged along the Y-axis direction, and one side + Y in the Y-axis direction. In the two magnets 41 arranged on the other side -Y in the Y axis direction, the magnetization polarization line 413 is arranged along the X axis direction.

  The four magnets 41 have the same magnetization pattern on the outer surface side and the inner surface side. For this reason, since the magnets 41 adjacent in the circumferential direction do not attract each other, assembly and the like are easy. The first case 110 is made of a magnetic material and functions as a yoke for the magnet 41.

  The coil 42 is an air-core coil having no magnetic core (core), and is held by the holder frame 220 as described above. The coils 42 are respectively held on one side + X in the X-axis direction of the holder frame 220, the other side -X in the X-axis direction, one side + Y in the Y-axis direction, and the other side -Y in the Y-axis direction. . Among these, the coils 42 arranged on one side + X in the X-axis direction of the holder frame 220 and on the other side -X in the X-axis direction are formed in an annular shape by winding so that the X-axis direction is the axial direction of the coil. ing. Further, both coils 42 arranged on one side + Y in the Y-axis direction and on the other side -Y in the Y-axis direction are formed in an annular shape by winding so that the Y-axis direction is the axial direction of the coil. Therefore, any of the coils 42 is formed in an annular shape in which the direction orthogonal to the optical axis L direction is the axial direction of the coil. Moreover, these four coils 42 are formed in the same planar shape and the same thickness (height) dimension.

  Of the four coils 42, the two coils 42 having the X-axis direction as the axial direction of the coil are formed in a rectangular shape extending in the Y-axis direction. The two coils 42 having the Y-axis direction as the axial direction of the coil are formed in a rectangular shape extending in the X-axis direction. In each of the coils 42, the long side portions arranged above and below are used as effective sides 421 and 422 facing the magnetic poles 411 and 412 of each magnet 41, and in a state where the coil 42 is not excited, The effective sides 421 and 422 are parallel to the magnetization polarization line 413 of the opposing magnet 41 and are arranged at equal distances from the magnetization polarization line 413 in the vertical direction.

(Configuration of gimbal mechanism 30)
In the optical unit 101 of the present embodiment, the movable body 20 is swingably supported around the first axis R1 intersecting the optical axis L direction in order to correct the shake in the pitching direction and the yawing direction, and in the optical axis L direction. And it supports so that it can rock | fluctuate around the 2nd axis R2 which cross | intersects 1st axis R1. For this reason, a gimbal mechanism (swing support mechanism) 30 is configured between the fixed body 10 and the movable body 20.

In the present embodiment, the gimbal mechanism 30 has a rectangular movable frame 310, and the movable frame 310 is disposed in the movable frame arrangement space 240 of the holder frame 220 as shown in FIGS. It is disposed between the lower surface of the cover frame 120 of the fixed body 10 (the other side in the Z-axis direction—the surface of Z) and the holder frame 220 of the movable body 20.
In the present embodiment, the movable frame 310 is made of a metal material having a spring property, and as shown in FIG. 7 and the like, four corners 311 arranged at intervals of 90 ° in the circumferential direction, It is formed in a rectangular shape having a connecting portion 312 for connecting the corner portion 311. A sphere 320 is fixed inside each of the four corners 311 of the movable frame 310. Each connecting portion 312 has a meandering shape that is curved in a direction orthogonal to each extending direction and the Z-axis direction. Therefore, the movable frame 310 has a spring property that can absorb an impact when an impact is applied from the outside.

On the other hand, the lower surface of the cover frame 120 (the surface on the −Z side) is positioned diagonally in the direction in which the first axis R1 extends, among the four corners around the optical axis L, as shown in FIG. Grooves 122 that open toward the other side -Z in the Z-axis direction and radially outward are formed at the two corners. In addition, contact springs 330 are attached to the respective grooves 122, and the contact springs 330 are positioned diagonally in the direction in which the first axis R <b> 1 extends among the four spheres 320 of the movable frame 310. Two spheres 320 are supported respectively.
Further, on the upper surface of the base portion 222 of the holder frame 220, as shown in FIG. 9, two corners located diagonally in the direction in which the second axis R2 extends are on one side in the Z-axis direction. Grooves 225 that open toward + Z and radially outward are formed. Contact grooves 330 are attached to the respective groove portions 225, and two spheres positioned diagonally in the direction in which the second axis R <b> 2 extends among the four spheres 320 of the movable frame 310 are attached to the contact springs 330. 320 are each supported.

  Specifically, each contact spring 330 is bent to have a U-shaped longitudinal section by press-molding a plate made of a metal such as stainless steel that can be elastically deformed, and is provided in the movable frame 310. An elastic load (elastic force) is applied to the contact point with the spherical body 320 from the inner side to the outer side in the radial direction. That is, the spheres 320 provided at the four corners 311 of the movable frame 310 are radially outward from the contact springs 330 attached to the cover frame 120 of the fixed body 10 or the holder frame 220 of the movable body 20. It is made to contact elastically and can slide at the contact portion.

In this case, as shown in FIG. 9, the contact springs 330 fixed to the cover frame 120 face each other so as to form a pair in the first axis R <b> 1 direction, and the first swing between the spherical body 320 of the movable frame 310. Configure a dynamic fulcrum. On the other hand, the contact springs 330 fixed to the holder frame 220 face each other so as to form a pair in the second axis R2 direction, and form a second swing fulcrum with the sphere 320 of the movable frame 310. Therefore, the swinging center position (swinging fulcrum) 35 of the movable body 20 is arranged at the intersection of the first axis R1 and the second axis R2 in which these first and second swinging fulcrum are combined. Is done.

  Thus, the holder frame 220 of the movable body 20 can swing with respect to the cover frame 120 of the fixed body 10 because each sphere 320 of the movable frame 310 is slidably in contact with the contact spring 330. It is supported by. Further, in the gimbal mechanism 30 configured as described above, the biasing force of each contact spring 330 is set equal. In the present embodiment, since a magnetic drive mechanism is used for the shake correction drive mechanism 40, both the movable frame 310 and the contact spring 330 used in the gimbal mechanism 30 are made of a nonmagnetic material.

  In the present embodiment, the movable frame 310 is disposed at the same height position as the coil holding portion 223 (the same position in the Z-axis direction). For this reason, when viewed from a direction orthogonal to the optical axis L direction, the gimbal mechanism 30 is disposed at a position overlapping the shake correction drive mechanism 40. In particular, in the present embodiment, as shown in FIG. 8, the gimbal mechanism 30 overlaps with the center position in the Z-axis direction of the shake correction drive mechanism 40 when viewed from the direction orthogonal to the optical axis L direction. Is arranged. More specifically, when the shake correction drive mechanism 40 is in a non-excited state, the gimbal mechanism 30 is provided at the same height as the magnetization polarization line 413 of the magnet 41 in the Z-axis direction. Therefore, the first swing fulcrum and the second swing fulcrum of the gimbal mechanism 30 are arranged at positions that overlap with the center position of the shake correction drive mechanism 40 in the Z-axis direction, and the swing center position 35 of the movable body 20 also swings. It is arranged at a position overlapping the center position of the correction drive mechanism 40.

  In addition, between the cover frame 120 of the fixed body 10 and the holder frame 220 of the movable body 20, both the cover frame 120 and the holder frame 220 are connected, and the shake correction drive mechanism 40 is in a stopped state. A plate-like spring 510 that defines the posture of the movable body 20 is provided. The plate spring 510 is a spring member obtained by processing a metal plate into a predetermined shape. As shown in FIG. 5, the fixed body side connecting portion 511 constituting the outer peripheral portion and the annular movable body side constituting the inner peripheral portion. It has the connection part 512 and the leaf | plate spring-shaped arm part 513 which connects between the fixed body side connection part 511 and the movable body side connection part 512. FIG.

  The fixed body side connecting portion 511 is positioned by four convex portions 125 formed on the cover frame 120 in a state of being superimposed on the lower surface of the cover frame 120 of the fixed body 10 (the other side in the Z-axis direction—the surface of Z). It is fixed by bonding or the like. Although not shown, the movable body side connecting portion 512 is positioned by four protrusions 226 formed on the holder holding portion 221 of the holder frame 220 of the movable body 20, and is fixed by adhesion or the like.

(Support structure for flexible wiring board)
The flexible wiring board 71 connected to each coil 42 of the shake correction drive mechanism 40 and drawn from the lower surface of the holder frame 220 and the flexible wiring board 72 drawn from the mounting board 215 to which the image sensor 212 and the like are connected As described above, the second case 130 is pulled out from the opening 132. In this case, after the flexible wiring boards 71 and 72 are bent a plurality of times in the second case 130, the intermediate positions in the length direction are fixed to the second case 130.

  The flexible wiring boards 71 and 72 are overlapped with leading ends 715 and 725 after being pulled out from the second case 130, and these leading ends 715 and 725 are connected to other wirings (not shown) and the like. Further, a connecting portion 716 for connecting the flexible wiring boards 71 divided in two is provided at a midpoint in the length direction of the flexible wiring boards 71 and 72, and the flexible wiring board 72 is connected to the connecting portion 716. Arranged to overlap. In the vicinity of the connecting portion 716, on the base end side (the holder frame 220 side) of the connecting portion 716, the both sides of the flexible wiring board 71 are partly orthogonal to the length direction of the flexible wiring board 71. Projections 730 are formed so as to protrude from each other.

These convex portions 730 are formed in a rectangular plate shape having the same thickness as the flexible wiring board 71, are formed so as to protrude in the surface direction from both sides of the flexible wiring board 71, and extend in the length direction of the flexible wiring board 71. And a side along a direction perpendicular to the length direction. Position adjustment indexes 741 and 742 for restricting the attachment position to the second case 130 are formed on the back surfaces of the convex portions 730 (the other side in the Z-axis direction—the Z surface). The position adjustment indicators 741 and 742 are arranged on the base end side (holder frame side) of the side 731 along the length direction of the flexible wiring board 71 and the two sides along the width direction orthogonal to the length direction. It is formed in two sides with the side 732 currently made. The position adjustment index 741 formed on the side 731 along the length direction of the flexible wiring board 71 is the length direction position adjustment index, and is formed on the side 732 along the width direction orthogonal to the length direction. The position adjustment index 742 is a width direction position adjustment index.
Of the two sides 731 and 732 on which the position adjustment indicators 741 and 742 are formed, the side 732 along the length direction of the flexible wiring board 71 is the first side, and the side along the width direction orthogonal to the length direction. Let 732 be the second side. In the present embodiment, the position adjustment indexes 741 and 742 are scales in which lines of a certain length extending in a direction orthogonal to the sides 731 and 732 are arranged at a predetermined pitch along the sides 731 and 732.

  On the other hand, the second case 130 is formed to have a substantially square outer shape when viewed from the bottom, and a bottom plate portion 131 is formed on the bottom of the second case 130 so as to project in an inward flange shape. This bottom plate portion 131 is formed with a predetermined width along each side of the square, and as shown in FIG. 10 on one side arranged on one side + Y in the Y-axis direction among the four sides of the square, A substrate support portion 133 on which the flexible wiring substrates 71 and 72 are placed is formed. In the present embodiment, the substrate support portion 133 has a base portion 133a formed with the same overhang width as the other side of the bottom plate portion 131 and an inner portion (the other side in the Y-axis direction) at an intermediate position in the X-axis direction of the base portion 133a. And a protruding portion 133b protruding so as to project to the side -Y). Both side edges (one side in the X-axis direction + X edge and the other side -X edge) of the protrusion 133b of the substrate support part 133 are provided apart from the inner edges of the adjacent portions in the bottom plate part 131. It has been. In other words, the width dimension D1 (see FIG. 6) of the protrusion 133b of the substrate support part 133 along the X-axis direction is formed smaller than the width dimension D2 of the opening 132 along the X-axis direction. Further, the protruding portion 133b is formed with a predetermined protruding length L1 along the Y-axis direction from the inner edge of the base portion 133a (one side in the Y-axis direction of the opening 132 + the Y peripheral edge).

In this case, the width dimension D1 along the X-axis direction of the protruding part 133b of the substrate support part 133 is the width dimension along the X-axis direction of the portion where the convex part 730 of the flexible wiring board 71 is provided (between both first sides). Distance) D3 (see FIG. 11), and when the flexible wiring boards 71 and 72 are placed on the board support part 133, the first side 731 of the both convex parts 730 is the board support part 133. The side edges 134 of the protrusion 133b are arranged below the side edges 134 of the protrusion 133b and below the position adjustment index 741 formed on the second side 732 of the protrusion 730. It has become.
On the other hand, the protruding length L2 of the protruding portion 133b does not need to be longer than the length of the first side 731 of the convex portion 730 of the flexible wiring board 71, but may be shorter. When the position adjustment index 742 of the second side 732 of the convex part 730 is arranged above the both side edges 134 of the protrusion 133b, the inner edge 135 of the base part 133a is flexible wiring. The dimensional relationship is set below the position adjustment index 741 of the first side 731 of the convex portion 730 of the substrate 71.

<Method for manufacturing optical unit with shake correction function>
The manufacturing method of the optical unit 101 with the shake correction function configured as described above includes a temporary assembly process in which the movable body 20 is supported by the swing support mechanism 30 in the fixed body 10, and the flexible wiring boards 71 and 72 after the temporary assembly process. Is mounted on the substrate support part 133 of the fixed body 10 and the position of the flexible wiring board 71 with respect to the substrate support part 133 is confirmed by the position adjustment indicators 141 and 142, and flexible on the substrate support part 133 as necessary. A positioning step of positioning the movable body 20 on the fixed body 10 by moving the wiring substrates 71 and 72 in the longitudinal direction, and a fixing step of fixing the flexible wiring substrates 71 and 72 to the substrate support 133 after the positioning step; Have

(Temporary assembly process)
In the temporary assembly process, the optical module 210 is incorporated into the holder frame 220 and the gap between the cover frame 120 of the fixed body 10 and the holder frame 220 of the movable body 20 is supported by the gimbal mechanism 30. The holder holding part 221 of the holder frame 220 is connected by a plate spring 510.
In addition, the flexible wiring boards 71 and 72 connected to the optical module 210 and the holder frame 220 are drawn out from the opening 132 in a state of being bent a plurality of times in the second case 130.

(Positioning process)
The movable body 20 is arranged in a state where the Z-axis direction coincides with the optical axis L direction in the fixed body 10, and the intermediate position of the coil 42 of the movable body 20 is arranged on the magnetization polarization line 413 of the magnet 41 of the fixed body 10. However, when the movable body 20 is assembled to the fixed body 10 at an accurate position, the position adjustment indicators 141 and 142 of the convex portion 730 of the flexible wiring board 71 and the substrate support portion 133 The positional relationship between the first side 131 and the second side 132 is determined in advance.
Therefore, among the convex portions 730 of the flexible wiring board 71, the first side 731 is overlapped with the inner edge 135 of the base portion 133a of the substrate support portion 133, and the second side 732 is overlapped with the side edge 134 of the protruding portion 133b. The inner edge 135 of the base portion 133a overlaps with a predetermined position of the position adjustment index 741 formed on the one side 731 and the position adjustment index 742 formed on the second side 732 has a predetermined position. It arrange | positions so that the side edge 134 of the protrusion part 133b may overlap. In this way, the flexible printed circuit board is configured such that the positions on the predetermined position adjustment indicators 141 and 142 are respectively overlapped with the side edge 134 of the protruding portion 133b and the inner edge 135 of the base portion 133a. If the convex portion 730 of 71 is placed on the substrate support portion 133, the movable body 20 can be assembled to the fixed body 10 at an accurate position.
That is, in this embodiment, both side edges 134 of the protrusion 133b of the board support part 133 and the inner edge 135 of the base part 133a are reference sides corresponding to the position adjustment indexes 741 and 742 of the flexible wiring board 71. This is a fixed side position adjustment index.

This positioning step is performed while confirming the optical axis L of the optical module 210 in the movable body 20 by an autocollimator. In this case, it may be necessary to finely adjust the posture of the movable body 20 even when the position adjustment indicators 741 and 742 and the substrate support portion 133 are arranged in a predetermined positional relationship. In that case, the convex portion 730 is placed on the substrate support portion 133 while confirming the measurement result by the autocollimator and the position adjustment indexes 141 and 142 formed on the convex portion 730 of the flexible wiring board 71. The position of the movable body 20 is finely adjusted by moving in the axial direction or the Y-axis direction. Also in this fine adjustment operation, the relationship between the amount of movement when the position adjustment indicators 741 and 742 are moved on the substrate support part 133 and the magnitude of the deviation of the optical axis L measured by the autocollimator is the relationship between both positions. The adjustment indicators 141 and 142 are measured in advance. For this reason, the movable body is moved by moving the position adjustment indexes 141 and 142 of any one of the sides 731 and 732 along the sides 134 and 135 of the corresponding substrate support part 133 in accordance with the measurement result by the autocollimator. The position of 20 can be adjusted and positioned.
Thus, in this positioning step, since the position adjustment indicators 141 and 142 are formed on the flexible wiring substrate 71, the flexible wiring substrate 71 and the fixed body 10 are connected to each other based on the position adjustment indicators 141 and 142. Even when fine adjustment is performed at the time of positioning, the position on the position adjustment indicators 141 and 142 can be shifted according to the adjustment amount, compared with the case of reattaching with adhesive tape. Thus, damage to the flexible wiring boards 71 and 72 can be suppressed, and the fine adjustment work is facilitated.

(Fixing process)
After the positioning step, the flexible wiring boards 71 and 72 are fixed to the board support part 133 in a mounted state by fixing the convex part 730 of the flexible wiring board 71 to the board support part 133 with an adhesive or the like.
If the bottom cover 140 is attached after the flexible wiring boards 71 and 72 are fixed, the assembly is completed. In the bottom cover 140, the cushion member 144 is affixed to the holding portion 143 that contacts the flexible wiring boards 71 and 72, so that the flexible wiring boards 71 and 72 are not damaged.

In the optical unit 101 with the shake correction function assembled in this way, the optical module 210 is swung around the first axis R1 or the second axis R2 by the swing correction drive mechanism 40 with respect to pitching and yawing. Therefore, the shake can be corrected.
In this case, the flexible wiring board 72 connected to each coil 42 of the shake correction drive mechanism 40 and the flexible wiring board 71 connected to the optical module 210 are supplied to the shake correction drive mechanism 40 as described above. In the state where no flow occurs, the width direction is arranged in parallel with the same X-axis direction in any part and is held so as not to be twisted. When a drive current is supplied to the shake correction drive mechanism 40 and shake correction is performed, the flexible wiring boards 71 and 72 may be slightly twisted according to the swing of the movable body 20. The curved portions 713 and 722 are disposed between the portion sandwiched between the spacer 261 and the clamp member 262 and the portion sandwiched between the substrate support portion 133 and the protruding piece 80, and each of them is in a greatly curved state. Is retained. Accordingly, it is possible to suppress the movement of the movable body 20 by following the swinging of the movable body 20 while causing a gentle twist or the like at the curved portions 713 and 722.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
In the above-described embodiment, the position adjustment indexes 141 and 142 are configured by a scale in which lines of a certain length are arranged at a predetermined pitch. However, the position adjustment indexes 141 and 142 are not limited to this form as long as they can serve as positioning indexes. For example, instead of lines, triangle symbols are arranged as shown in FIG. In addition to the triangle mark, various symbols such as a circle mark and a square mark can be used. Alternatively, as shown in FIG. 12B, protrusions are formed at a predetermined pitch on the side edge of the flexible wiring board. A cut may be used instead of the protrusion. Alternatively, as shown in FIG. 12C, an appropriate shape such as forming holes at a predetermined pitch on the side edge of the flexible wiring board can be adopted. In FIG. 12, the first side or the second side of the flexible wiring board is represented by reference numeral 731, and the position adjustment index is also denoted by reference numeral 741.
Further, as the fixed side position adjustment index 742, reference sides of both side edges 134 of the protruding portion 133b of the substrate supporting portion 133 and the inner edge 135 of the base portion 133a are used, but the protruding portions 133b of these substrate supporting portions 133 are used. The same scale as the position adjustment index 741 of the flexible wiring board 71 may be formed on both side edges 134 and the inner edge 135 of the base portion 133a.
In addition, since both the convex portions 730 of the flexible wiring board 71 are moved on the substrate support portion 133, for example, a reinforcing foil such as a copper foil is attached to the back surface, or the convex portion is thicker than the other portions. The convex portion may be reinforced by forming or the like.

  The gimbal mechanism 30 has a structure in which the sphere 320 fixed to the movable frame 310 is brought into contact with the contact spring 330. However, the sphere 320 may not be necessarily formed, and the tip surface of a rod-shaped member or the like is formed in a spherical shape. It is good also as a structure which makes a spherical front end surface contact the spring 330 for contacts.

  R1 ... first axis, R2 ... second axis, 10 ... fixed body, 20 ... movable body, 30 ... gimbal mechanism (swing support mechanism), 35 ... swing center position, 40 ... swing correction drive mechanism, 41 DESCRIPTION OF SYMBOLS ... Magnet, 42 ... Coil, 71, 72 ... Flexible wiring board, 101 ... Optical unit with correction function, 110 ... First case, 111 ... Side plate part, 120 ... Cover frame, 121 ... Opening window, 122 ... Groove part, 125 ... Protruding part 130 ... second case 131 ... bottom plate part 132 ... opening part 133 ... substrate support part 133a ... base part 133b ... protruding part 134 ... side edge 135 ... inner edge 140 ... bottom cover ( Cover), 141, 142 ... legs, 143 ... pressing part, 144 ... cushion member, 150 ... stopper member, 210 ... optical module, 211 ... optical element, 212 ... imaging element, 213 ... lens holder 214 ... Sensor holder, 215 ... Mounting board, 220 ... Holder frame, 221 ... Holder holding part, 222 ... Base part, 223 ... Coil holding part, 224 ... Projection part, 226 ... Projection part, 230 ... Weight, 225 ... Groove part, 240 ... movable frame arrangement space, 261 ... spacer, 262 ... clamp member, 310 ... movable frame, 311 ... corner part, 312 ... connecting part, 320 ... sphere, 330 ... spring for contact, 411, 412 ... magnetic pole, 413 ... wearing Magnetic polarization lines, 421, 422 ... Effective side, 510 ... Plate spring, 511 ... Fixed body side connecting portion, 512 ... Movable body side connecting portion, 513 ... Arm portion, 711 ... First bending portion, 712 ... Second bending portion, 713 ... third curved part, 721 ... frame-shaped substrate part, 722 ... curved part, 715, 725 ... tip part, 716 ... connecting part, 730 ... convex part, 731 ... first side, 732 ... second side 741, 742 ... position adjustment for the index.

Claims (7)

  A movable body having an optical element and an imaging element; a fixed body surrounding the movable body; a swing support mechanism for swingably supporting the movable body with respect to the fixed body; and the movable body in the fixed body. A swing correction drive mechanism for swinging and a flexible wiring board connected to the imaging element in the movable body and drawn out of the fixed body, the fixed body having a length direction of the flexible wiring board An optical unit with a shake correction function, wherein a substrate support portion is provided in which a position in the middle is fixed in a mounted state, and an index for position adjustment with respect to the substrate support portion is formed on the flexible wiring board.   2. The optical unit with a shake correction function according to claim 1, wherein the position adjustment index in the flexible wiring board is formed on both sides of the flexible wiring board.   The optical unit with a shake correction function according to claim 1, wherein a fixed side position adjustment index with respect to the flexible wiring substrate is formed on the substrate support portion.   The position adjustment index includes a length direction position adjustment index and a width direction position adjustment index, and a convex portion extending in a surface direction is formed on a side portion of the flexible wiring board. A first side along the length direction of the wiring board and a second side along the width direction orthogonal to the length direction are formed, the length direction position adjustment index is formed on the first side, the first side 4. The optical unit with a shake correction function according to claim 3, wherein the width direction position adjustment index is formed on two sides.   The fixed side position adjustment index is composed of two reference sides formed on the substrate support portion along a drawing direction in which the flexible wiring board is drawn out and a horizontal direction perpendicular thereto, and the reference side along the drawing direction 5 is arranged so as to overlap the second side of the flexible wiring board, and the reference side along the lateral direction is arranged to overlap the first side of the flexible wiring board. Optical unit with shake correction function.   The fixed body is provided with a cover that covers the flexible wiring substrate on the substrate support portion, and a pressing portion that includes a cushion member that presses the flexible wiring substrate on the substrate support portion is formed on the cover. The optical unit with a shake correction function according to claim 1, wherein the optical unit has a shake correction function.   6. The method of manufacturing an optical unit with a shake correction function according to claim 1, wherein the movable body is supported in the fixed body by the swing support mechanism, and the temporary assembly process. A positioning step of positioning the movable body on the fixed body while placing the flexible wiring board on the board support portion of the fixed body and confirming the position of the flexible wiring board with respect to the substrate support section by the position adjustment index; A method of manufacturing an optical unit with a shake correction function, comprising: a fixing step of fixing the flexible wiring board to the substrate support portion after the positioning step.

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