JP6182359B2 - Optical unit - Google Patents

Description

  The present invention relates to an optical unit mounted on a camera-equipped mobile phone or the like.

  In recent years, mobile phones have been configured as optical devices equipped with an optical unit for photographing. In such an optical unit, in order to suppress disturbance of a captured image due to a user's camera shake, a movable body including an optical element such as a lens or an image sensor is supported so as to be swingable with respect to a fixed body, and an angular velocity sensor There has been proposed a technique of swinging a movable body based on a detection result of shake by a photo reflector or the like (see Patent Document 1).

  In Patent Document 1, as shown in FIG. 7, when an imaging element or the like mounted on the movable body 3 is electrically connected to the outside, a flexible wiring board 490 is connected to the movable body 3, and the flexible wiring board is used. A structure in which 490 is pulled out of the fixed body 200 has been proposed. Further, there has been proposed a configuration in which a play portion 491 is provided by folding the flexible wiring board 490 between the rear end 3b in the optical axis direction of the movable body 3 and the fixed body 200. According to this configuration, there is an idle portion 491 between the connecting portion 496 between the movable body 3 and the flexible wiring board 490 by the joining member 495 and the holding position 497 of the flexible wiring board 490 by the fixed body 200. For this reason, as indicated by the arrow LY2, the movable body 3 is one side Y1 in the Y-axis direction orthogonal to the optical axis L due to an external impact (the side away from the holding position 497 of the flexible wiring board 490 by the fixed body 200) ), The flexible wiring board 490 can be relaxed from being in a tensioned state by the play portion 491 of the flexible wiring board 490. Therefore, cutting of the flexible wiring board 490 can be prevented.

JP 2011-232708 A

  However, in the structure in which the flexible wiring substrate 490 is folded between the rear end portion 3b in the optical axis direction of the movable body 3 and the fixed body 200 as in the configuration described in Patent Document 1, the optical axis direction of the movable body 3 is used. The flexible wiring board 490 passes twice between the rear end 3b and the fixed body 200. For this reason, since it is necessary to secure a large space between the rear end portion 3b in the optical axis direction of the movable body 3 and the fixed body 200, there is a problem that the dimension in the optical axis direction of the optical unit becomes large. is there.

  In view of the above problems, the problem of the present invention is that the size of the optical unit in the optical axis direction is small and the flexible wiring board is overstrained even when the movable body is displaced in a direction perpendicular to the optical axis. It is an object of the present invention to provide an optical unit that can prevent the above-described problem.

In order to solve the above problems, an optical unit according to the present invention includes a movable body that holds an optical element, a fixed body that supports the movable body in a swingable manner, a drive mechanism that swings the movable body, The movable body side substrate holding part provided on one side in the first direction orthogonal to the optical axis of the movable body passes through the rear side of the movable body in the direction in which the optical axis extends, and A flexible wiring board held by a fixed body side substrate holding portion provided on the other side in the first direction, and at least one of the movable body side substrate holding portion and the fixed body side substrate holding portion is the light An elastic part that is elastically deformable in a direction along the axis is provided, and the flexible wiring board is fixed to the elastic part.

  In the present invention, the flexible wiring board is held by the movable body side substrate holding portion of the movable body on one side in the first direction orthogonal to the optical axis, and passes through the rear side in the optical axis direction of the movable body. It is held by a fixed body side substrate holder provided on the other side in one direction. For this reason, since the flexible wiring board passes only once in the optical axis direction rear side of the movable body, the dimension of the optical unit in the optical axis direction can be reduced. Further, since the flexible wiring board is held by the fixed body side substrate holding portion of the fixed body on the other side in the first direction, even if a force is applied to the flexible wiring board outside the holding position of the flexible wiring board by the fixed body. The effect of this force does not reach the movable body. Furthermore, at least one of the movable body side substrate holding portion that holds the flexible wiring board on the movable body side and the fixed body side substrate holding portion that holds the flexible wiring substrate on the fixed body side is elastically deformable in a direction along the optical axis. Since the flexible wiring board is connected to the part, even when the movable body is displaced to one side in the first direction (the side opposite to the holding position by the fixed body) due to an external impact, such displacement is caused by the light of the elastic part. Absorbed by deformation in the direction along the axis.

  In the present invention, the elastic portion may employ a configuration in which a notch is formed in a plate-like portion extending in a direction intersecting the optical axis.

  In the present invention, the notch is formed so as to narrow the dimension of the plate-like portion in the second direction orthogonal to the optical axis and the first direction, and the tip-like side of the notch of the plate-like portion is It is preferable that the elastic portion is configured. According to such a configuration, the elastic portion can be formed more easily than when the elastic portion is configured by thinning the plate-like portion.

  In the present invention, the plate-like portion is made of metal, for example. According to this structure, an elastic part can be comprised using a part of metal part used for the movable body or the fixed body.

  In this invention, it is preferable that the said plate-shaped part is extended in the direction spaced apart from the said optical axis in the said 1st direction, and the said elastic part is comprised in the front end side of the said plate-shaped part. According to this structure, the flexible wiring board between the movable body side substrate holding part and the fixed body side substrate holding part can be lengthened. Therefore, the flexible wiring board can be easily bent.

In the present invention, it is possible to adopt a configuration in which the elastic portion and the flexible wiring board are fixed by an adhesive provided in an overlapping portion between the elastic portion and the flexible wiring board.

In the present invention, it is preferable that a bottomed groove formed on a surface overlapping the flexible wiring board and a through hole overlapping a part of the groove are formed in the elastic portion. According to such a configuration, it is possible to connect the elastic part and the flexible wiring board by injecting the adhesive from the through hole in a state where the flexible wiring board is overlapped on the elastic part. Moreover, since an adhesive agent accumulates in a groove | channel, an elastic part and a flexible wiring board can be connected firmly.

  In the present invention, it is preferable that the groove overlaps the whole of the flexible wiring board in the second direction. According to such a configuration, the elastic portion and the flexible wiring board can be more firmly connected.

  In this invention, it is preferable that the dimension of the said 2nd direction of the said elastic part is the same as the dimension of the said 2nd direction of the part which overlaps with the said elastic part in the said flexible wiring board. According to this configuration, the elastic portion and the flexible wiring board can be firmly connected.

  In the present invention, the adhesive preferably has elasticity.

In this invention, it is preferable that the reinforcement board is affixed to the part currently fixed to the said elastic part in the said flexible wiring board. According to this configuration, the flexible wiring board can be reliably fixed to the elastic portion.

  In the present invention, the fixed body includes a bottom plate portion facing the movable body on the rear side in the direction in which the optical axis extends, and a cylindrical body portion that covers the movable body, and the bottom plate portion includes the bottom plate portion. It is preferable that a fixed body side substrate holding portion is configured, and the elastic portion is formed at least on the fixed body side substrate holding portion.

  In the present invention, the flexible wiring board is held by the movable body side substrate holding portion of the movable body on one side in the first direction orthogonal to the optical axis, and passes through the rear side in the optical axis direction of the movable body. It is held by a fixed body side substrate holder provided on the other side in one direction. For this reason, since the flexible wiring board passes only once in the optical axis direction rear side of the movable body, the dimension of the optical unit in the optical axis direction can be reduced. Further, since the flexible wiring board is held by the fixed body side substrate holding portion of the fixed body on the other side in the first direction, even if a force is applied to the flexible wiring board outside the holding position of the flexible wiring board by the fixed body. The effect of this force does not reach the movable body. Furthermore, at least one of the movable body side substrate holding portion that holds the flexible wiring board on the movable body side and the fixed body side substrate holding portion that holds the flexible wiring substrate on the fixed body side is elastically deformable in a direction along the optical axis. Since the flexible wiring board is connected to the part, even when the movable body is displaced to one side in the first direction (the side opposite to the holding position by the fixed body) due to an external impact, such displacement is caused by the light of the elastic part. Absorbed by deformation in the direction along the axis. For this reason, even when the movable body is displaced to one side in the first direction (the side opposite to the holding position by the fixed body), the flexible wiring board does not become excessively tensioned. The situation can be avoided.

It is explanatory drawing which shows typically a mode that the optical unit with a shake correction function to which this invention is applied was mounted in optical apparatuses, such as a mobile telephone. It is explanatory drawing which shows the whole structure of the optical unit with a shake correction function which concerns on Embodiment 1 of this invention. It is a disassembled perspective view of the optical unit with a shake correction function according to the first embodiment of the present invention. It is sectional drawing of the optical unit with a shake correction function which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows typically structures, such as a flexible wiring board used for the optical unit with a shake correction function which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows a mode that the flexible wiring board is hold | maintained by the lower cover in the optical unit with a shake correction function which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows typically structures, such as a flexible wiring board used for the conventional optical unit.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In the following description, as an optical unit, an optical unit with a shake correction function having a function of preventing camera shake of the imaging unit will be exemplified. In the following description, three directions orthogonal to each other are defined as an X-axis direction, a Y-axis direction, and a Z-axis direction, respectively, and a direction (optical axis direction) along the optical axis L (lens optical axis) is defined as a Z-axis direction. In the following description, rotation around the X-axis among the shakes in each direction corresponds to so-called pitching (pitch), and rotation around the Y-axis corresponds to so-called yawing (roll) and rotation around the Z-axis. Corresponds to so-called rolling. Also, X1 is attached to one side in the X-axis direction, X2 is attached to the other side, Y1 is attached to one side in the Y-axis direction, Y2 is attached to the other side, and Z-axis direction is attached. In the following description, Z1 is assigned to one side (opposite the subject side / optical axis direction rear side), and Z2 is assigned to the other side (subject side / optical axis direction front side). In the present invention, the “first direction” corresponds to the Y-axis direction, and the “second direction” corresponds to the X-axis direction.

[Embodiment 1]
(Overall configuration of optical equipment)
FIG. 1 is an explanatory view schematically showing a state in which an optical unit with a shake correction function to which the present invention is applied is mounted on an optical device such as a mobile phone.

  An optical unit 100 (an optical unit with a shake correction function) illustrated in FIG. 1 is a thin camera used for an optical device 1000 such as a mobile phone with a camera, and is supported by a chassis 1100 (device main body) of the optical device 1000. It is mounted with. In the optical apparatus 1000, when a shake such as a hand shake occurs during shooting, the captured image is disturbed. Therefore, in the optical unit 100 of the present embodiment, as will be described later, the movable body 3 provided with the imaging unit 1 is supported so as to be swingable within the fixed body 200, and a gyroscope (not shown) mounted on the optical unit 100 is illustrated. 1), or a shake correction drive mechanism (see FIG. 1) that swings the movable body 3 based on the result of detection of camera shake by a shake detection sensor such as a gyroscope (not shown) mounted on the main body side of the optical device 1000. (Not shown).

(Overall configuration of optical unit)
FIG. 2 is an explanatory diagram showing the overall configuration of the optical unit with a shake correction function according to the first embodiment of the present invention, and FIGS. 2A and 2B are a perspective view of the optical unit and each block. It is the disassembled perspective view decomposed | disassembled into. FIG. 3 is an exploded perspective view of the optical unit with a shake correction function according to Embodiment 1 of the present invention. 4 is a cross-sectional view of the optical unit with a shake correction function according to Embodiment 1 of the present invention, and FIGS. 4A and 4B are a YZ cross-sectional view and an XZ cross-sectional view, respectively.

  As shown in FIGS. 2 to 4, the optical unit 100 is in a state in which the fixed body 200, the movable body 3 including the imaging unit 1, and the movable body 3 are supported so as to be displaceable with respect to the fixed body 200. A swing fulcrum 180 and a shake correction drive mechanism 500 that generates a magnetic drive force that swings the movable body 3 with respect to the fixed body 200 are provided. The optical unit 100 has a spring member 600 that urges the movable body 3 toward the swing fulcrum 180. In the optical unit 100, flexible wiring boards 400 and 470 for supplying power to the imaging unit 1 and the shake correction drive mechanism are drawn out. The flexible wiring board 400 has a function of outputting a signal from the imaging unit 1 and the like. For this reason, the flexible wiring board 400 is connected to the movable body 3.

  In the movable body 3, the imaging unit 1 has a rectangular box-shaped case 14 made of a ferromagnetic plate such as a steel plate. Inside the case 14, a holder for holding the lens 1a and a cylinder for holding the holder are provided. And the like, a lens driving mechanism that drives the lens 1a in the focusing direction, an image sensor 1b (see FIG. 1) disposed on the rear side in the optical axis direction, an element holder that holds the image sensor 1b, and the like. The outer peripheral portion of the imaging unit 1 includes a case 14. In this embodiment, reflection sheets 141 and 142 constituting a reflection surface for a photo reflector described later are attached to the side plate portion 140 of the case 14.

  The fixed body 200 includes an upper cover 250, a lower cover 700, and the like. The upper cover 250 includes a rectangular tubular body 210 surrounding the movable body 3, and an opening on the subject side of the tubular body 210. And an end plate part 220 for closing the part. The end plate 220 is formed with a window 220a through which light from the subject enters. In the upper cover 250, the cylindrical body 210 has an open end opposite to the subject side (side on which the optical axis extends) (Z1 side). A cutout 219 is formed on the side surface of the cylindrical body 210 located in the X-axis direction, and a cutout 218 is formed on the side surface located in the Y-axis direction. Of the cutouts 218 and 219, the cutout 218 is used to pull out the flexible wiring board 400 and the like, and the other cutout 219 connects the upper cover 250 and the lower cover 700 by bonding, welding, or the like. It is used for.

  The lower cover 700 is a press-processed product for a metal plate, and includes a substantially rectangular bottom plate portion 710 and three side plate portions 720 that rise from the outer peripheral edge of the bottom plate portion 710 toward the subject. The side where is not formed is used to draw out the flexible wiring board 400 and the like. The bottom plate portion 710 of the lower cover 700 holds a receiving member 181 constituting a swing fulcrum 180 at the center position thereof, and the receiving member 181 contacts the rear end portion 3b of the movable body 3 in the optical axis direction. Thus, the movable body 3 is supported to be swingable. In this embodiment, the receiving member 181 is held by a hole 717 formed at the center position of the bottom plate portion 710. Here, the rear end portion 3b in the optical axis direction of the movable body 3 includes a rigid plate 30 described later, and a hemispherical pivot portion 31 that abuts against the receiving member 181 is formed on the rigid plate 30.

(Configuration of movable body 3)
The movable body 3 includes an imaging unit 1, a rectangular frame-shaped first holder 71, and a rectangular frame-shaped second holder 72, and there is a shake correction between the first holder 71 and the second holder 72. A plate-like permanent magnet 520 used for the drive mechanism 500 is held. More specifically, the first holder 71 is fixed to the front surface of the permanent magnet 520 in the optical axis direction, and the second holder 72 is fixed to the rear surface of the permanent magnet 520 in the optical axis direction. The magnet 520, the first holder 71, and the second holder 72 constitute a rectangular cylindrical permanent magnet assembly 75. For this reason, after the imaging unit 1 is inserted inside the rectangular cylindrical permanent magnet assembly 75, the outer peripheral surface of the case 14 of the imaging unit 1 and the inner peripheral surface of the permanent magnet assembly 75 (the inner surface of the permanent magnet 520). If fixed by an adhesive or the like, the movable body 3 can be configured by integrating the permanent magnet 520, the first holder 71, the second holder 72, and the imaging unit 1.

(Configuration of the spring member 600)
The spring member 600 includes a rectangular frame-shaped fixed side connecting portion 620 connected to the fixed body 200 side, a movable side connecting portion 610 connected to the movable body 3 side, a movable side connecting portion 610, and a fixed side connecting portion 620. The arm portions 630 are connected to the movable side connecting portion 610 and the fixed side connecting portion 620, respectively.

  In connecting the spring member 600 to the movable body 3 and the fixed body 200, in this embodiment, the movable side connecting portion 610 is fixed to the rear end surface in the optical axis direction of the second holder 72 by a method such as welding. Further, the fixed side connecting portion 620 is fixed to the upper end portion of the side plate portion 720 of the lower cover 700 by a method such as welding. The spring member 600 is made of non-magnetic metal such as beryllium copper or non-magnetic SUS steel, and is formed by pressing a thin plate having a predetermined thickness or etching using a photolithography technique.

  Here, when the movable side connecting portion 610 of the spring member 600 is connected to the movable body 3, and the fixed side connecting portion 620 is fixed to the fixed body 200, the movable body 3 swings when the optical unit 100 is assembled. The fulcrum 180 is pushed upward in the optical axis direction. For this reason, in the spring member 600, the movable side connecting portion 610 is pushed up to the front side in the optical axis direction relative to the fixed side connecting portion 620, and the arm portion 630 of the spring member 600 moves the movable body 3 to the rear side in the optical axis direction. Energize to. Therefore, the movable body 3 is biased toward the swing fulcrum 180 by the spring member 600, and the movable body 3 is supported by the fixed body 200 so as to be swingable by the swing fulcrum 180. It becomes.

(Configuration of shake correction drive mechanism)
In the optical unit 100 of the present embodiment, the shake correction drive mechanism 500 is configured by the coil unit 560 and the permanent magnet 520 that generates a magnetic field linked to the coil unit 560. More specifically, in the movable body 3, flat permanent magnets 520 are fixed to the four outer surfaces of the case 14, and a coil is attached to the inner surface of the cylindrical body 210 of the upper cover 250 (fixed body 200). The part 560 is fixed. Permanent magnet 520 is magnetized with different poles on the outer surface side and inner surface side. The permanent magnet 520 is composed of two magnet pieces arranged in the optical axis direction, and the magnet piece is magnetized to a pole whose surface facing the coil portion 560 is different in the optical axis direction. Moreover, the coil part 560 is formed in the square frame shape, and an upper and lower long side part is utilized as an effective side.

  Among these permanent magnets 520 and coil portions 560, the permanent magnets 520 and the coil portions 560 disposed at two locations sandwiching the movable body 3 on both sides in the Y-axis direction constitute a Y-side shake correction drive mechanism, The movable body 3 is swung around an axis extending in the X-axis direction through the swing fulcrum 180. In addition, the permanent magnet 520 and the coil portion 560 disposed at two positions sandwiching the imaging unit 1 on both sides in the X-axis direction constitute an X-side shake correction drive mechanism, and pass through the swing fulcrum 180 in the Y-axis direction. The movable body 3 is swung around the axis extending to the center.

  In this embodiment, as the coil portion 560, a sheet-like coil body 550 disposed along the four inner surfaces of the cylindrical body portion 210 of the upper cover 250 is used. The sheet-like coil body 550 has a structure in which a coil portion 560 made of fine copper wiring is formed on a printed circuit board by using a conductive wiring technique, and a plurality of layers of copper wiring (coil portion 560) is an insulating film. Are formed in multiple layers. The surface of the copper wiring (coil portion 560) is also covered with an insulating film. Here, the flexible wiring board 470 is fixed to the inner surface of the upper cover 250 by a method such as surface bonding while being bent along the four inner surfaces of the cylindrical body 210 of the upper cover 250. The sheet-like coil body 550 is affixed to the flexible wiring board 470 and is supplied with power through the flexible wiring board 470. As described above, in this embodiment, since the sheet-like coil body 550 is used as the coil portion 560, the distance between the movable body 3 and the fixed body 200 is reduced as compared with the case where a single air-core coil is used. Can do. Therefore, the size of the optical unit 100 can be reduced. In the flexible wiring substrate 470, a reinforcing sheet 590 is attached to an area where the sheet-like coil body 550 is attached. A reinforcing sheet 591 is also attached to the end of the flexible wiring board 470. In the flexible wiring board 470, a photo reflector (not shown) is mounted at a position facing the reflection sheets 141 and 142 provided on the movable body 3.

(Configuration of stopper mechanism)
In the optical unit 100 of this embodiment, the movable body 3 is in a state of being supported by the fixed body 200 so as to be swingable by the swing support point 180. Therefore, when a large force is applied from the outside and the movable body 3 is largely displaced, the arm portion 630 of the spring member 600 may be plastically deformed. Therefore, in the movable body 3, a rectangular frame-shaped stopper member 77 is fixed to the rear end portion in the optical axis direction of the imaging unit 1. The stopper member 77 protrudes outward from the permanent magnet 520 and faces the lower end portion of the sheet coil body 550 through a narrow gap. For this reason, a stopper mechanism is provided that defines a movable range when the movable body 3 is displaced in a direction orthogonal to the optical axis direction.

(Shake correction operation)
In the optical unit 100 of the present embodiment, when the optical apparatus 1000 shown in FIG. 1 is shaken, the shake is detected by the gyroscope, and the upper control unit is based on the detection by the gyroscope and the shake correction drive mechanism. 500 is controlled. That is, a drive current that generates a shake that cancels the shake detected by the gyroscope is supplied to the coil portion 560 of the sheet-like coil body 550 through the flexible wiring board 470. As a result, the shake correction drive mechanism 500 swings the movable body 3 about the Y axis about the swing fulcrum 180. Further, the shake correction drive mechanism 500 swings the movable body 3 about the X axis about the swing fulcrum 180. Further, if the swing of the movable body 3 around the X axis and the swing around the Y axis are combined, the movable body 3 can be displaced with respect to the entire XY plane. Therefore, all shakes assumed in the optical unit 100 can be reliably corrected.

(Configuration of flexible wiring board 400 and the like)
In the optical unit 100 of the present embodiment, one end portion of the flexible wiring board 400 is connected to the imaging unit 1 of the movable body 3, and the flexible wiring board 400 has the following configuration. First, on the inner side of the movable body 3, a rigid mounting board 450 on which the imaging element 1b is mounted is disposed on the front surface in the optical axis direction, and an end portion on one side Y1 of the mounting board 450 in the Y-axis direction. The flexible wiring board 400 is connected to the. In this embodiment, the mounting substrate 450 is formed integrally with the flexible wiring substrate 400.

  The flexible wiring board 400 is pulled out from one side Y1 in the Y-axis direction of the movable body 3, and then the rear end portion 3b in the optical axis direction of the movable body 3 and the bottom plate portion 710 of the fixed body 200 (lower cover 700). It extends toward the other side Y2 in the Y-axis direction, and is drawn out to the outside of the fixed body 200. The flexible wiring board 400 is provided with a held portion 405 that is bonded and fixed to the fixed body 200 on the other side Y2 in the Y-axis direction.

  In this embodiment, the mounting substrate 450 is fixed to the imaging unit 1 in the movable body 3. Further, a metal rigid plate 30 is disposed so as to overlap the rear surface of the mounting substrate 450 in the optical axis direction, and the rigid plate 30 is fixed to the mounting substrate 450 by a method such as adhesion. . Therefore, in this embodiment, the rear end portion 3b in the optical axis direction of the movable body 3 is constituted by the surface on the rear side in the optical axis direction of the rigid plate 30.

  A hemispherical pivot portion 31 protruding rearward in the optical axis direction is formed at substantially the center of the rigid plate 30, and the pivot portion 31 is supported by a receiving member 181 held by the bottom plate portion 710 of the lower cover 700. The rocking fulcrum 180 is configured in contact with the sway. Here, the flexible wiring board 400 is located behind the rigid plate 30 in the optical axis direction. The flexible wiring board 400 has an oval shape extending in the Y-axis direction in a region overlapping the pivot portion 31. A hole 409 is formed. For this reason, the pivot part 31 is in direct contact with the receiving member 181 held by the bottom plate part 710.

  The flexible wiring board 400 has a large width dimension located between the movable body 3 and the bottom plate portion 710, but is divided into two by the hole 409 in the X-axis direction. For this reason, the flexible wiring board 400 has a structure in which the rigidity of the portion located between the movable body 3 and the bottom plate portion 710 is significantly reduced. Therefore, when the movable body 3 is swung, the force applied to the movable body 3 from the flexible wiring board 400 is small.

(Holding structure of flexible wiring board 400)
FIG. 5 is an explanatory diagram schematically showing the configuration of the flexible wiring board 400 and the like used in the optical unit 100 with a shake correction function according to the first embodiment of the present invention. (C) is an explanatory view of the state in which the lower cover 700 is superimposed on the flexible wiring board 400, an explanatory view of the state in which the flexible wiring board 400 and the lower cover 700 are separated, and the rigid plate 30 is separated from the flexible wiring board 400. It is explanatory drawing of the state which carried out. FIG. 6 is an explanatory diagram showing a state where the flexible wiring board 400 is held by the lower cover 700 in the optical unit 100 with a shake correction function according to the first embodiment of the present invention. (B), (c) is the top view of the part holding the flexible wiring board 400 in the lower cover 700, a bottom view, and sectional drawing.

  As shown in FIG. 4A, on one side Y1 of the movable body 3 in the Y-axis direction, the flexible wiring board 400 extends to the one side Y1 in the Y-axis direction in the vicinity of the lead-out portion from the movable body 3. After that, a bent portion 401 that is bent in a U shape toward the other side Y2 is provided. The bent portion 401 is fixed to the surface on the rear side in the optical axis direction of the end portion on the one side Y1 in the Y-axis direction of the rigid plate 30 with the adhesive. A movable body side substrate holding portion 380 that holds 400 is configured. The movable body side substrate holding portion 380 is formed with two grooves 33 extending in the X-axis direction, and the grooves 33 fix the flexible wiring board 400 and the rigid plate 30 with an adhesive. It is used as an adhesive reservoir.

  As shown in FIGS. 4A, 5, and 6, on the other side Y <b> 2 in the Y-axis direction, the held portion 405 of the flexible wiring board 400 is connected to the bottom plate portion 710 of the lower cover 700 in the fixed body 200. It is glued. In this embodiment, the bottom plate portion 710 of the lower cover 700 is a plate that protrudes from the region facing the rear end portion 3b in the optical axis direction of the movable body 3 to the other side Y2 in the Y axis direction (direction away from the optical axis L). The plate-like portion 730 includes a fixed-body-side substrate holding portion 280 that holds the flexible wiring board 400.

  As described above, in this embodiment, the flexible wiring board 400 is formed by the movable body side substrate holding portion 380 of the movable body 3 and the fixed body side substrate holding portion 280 of the fixed body 200 from the rear end portion 3b in the optical axis direction of the movable body 3. Both sides of a portion 420 that extends obliquely on the rear side in the optical axis direction (between the rear end portion 3b in the optical axis direction of the movable body 3 and the bottom plate portion 710 of the fixed body 200) are held.

(Configuration of elastic part)
Here, a notch 731 is formed in the root portion of the plate-like portion 730, and a constriction 733 is formed in the root portion of the plate-like portion 730 by the notch 731. In this embodiment, the notch 731 is formed in a shape that is cut in a slit shape in the X-axis direction from both end portions in the X-axis direction of the plate-like portion 730, and the dimension (width) of the plate-like portion 730 in the X-axis direction. (Dimension) is narrowed. For this reason, the front end side of the notch 731 in the plate-like portion 730 is an elastic portion 732 that can be elastically deformed in the Z-axis direction along the optical axis L, and the elastic portion 732 allows the flexible wiring board 400 to be deformed. A fixed body side substrate holding portion 280 that holds the held portion 405 is configured.

  In this embodiment, the held portion 405 of the flexible wiring board 400 and the fixed body side substrate holding portion 280 are bonded to each other by an adhesive provided at the overlapping portion of the flexible wiring substrate 400 and the fixed body side substrate holding portion 280 (elastic portion 732). It is connected.

  Here, in the elastic portion 732 (fixed body side substrate holding portion 280), a groove 736 is formed on the surface of the flexible wiring substrate 400 that overlaps the held portion 405, and the groove 736 overlaps the center in the X-axis direction. A through-hole 737 is formed in the upper surface. For this reason, it is possible to connect the elastic part 732 and the held part 405 of the flexible wiring board 400 by injecting an adhesive from the through hole 737 in a state where the flexible wiring board 400 is superimposed on the elastic part 732.

  In this embodiment, the dimension in the X-axis direction of the elastic part 732 is equal to the dimension in the X-axis direction of the portion (held part 405) that overlaps the elastic part 732 in the flexible wiring board 400. Further, the groove 736 is formed in the entire X-axis direction of the elastic portion 732. Therefore, the groove 736 overlaps the entire X axis direction with respect to the held portion 405 of the flexible wiring board 400.

  In addition, a reinforcing plate 480 is attached to the held portion 405 of the flexible wiring board 400 on the front surface in the optical axis direction with an adhesive or the like. Further, two through holes 485 are formed in the held portion 405 so as to penetrate the flexible wiring board 400 and the reinforcing plate 480. For this reason, when fixing the to-be-held part 405 of the flexible wiring board 400 with an adhesive agent, the through hole 485 can also be used as an adhesive injection hole. In this embodiment, the dimension in the X-axis direction of the reinforcing plate 480 is the same as the dimension in the X-axis direction of the portion where the reinforcing plate 480 is affixed on the flexible wiring board 400, and the dimension in the Y-axis direction of the reinforcing plate 480 is The dimensions of the elastic portion 732 are the same as those in the Y-axis direction.

  A groove-shaped recess 719 extending in the X-axis direction is formed on the other side Y2 in the Y-axis direction on the surface of the bottom plate portion 710 of the lower cover 700 in the Z-axis direction. 719 has a function of reducing the contact area between the flexible wiring board 400 and the bottom plate portion 710.

(Main effects of this form)
As described above, in the optical unit 100 (optical unit with shake correction function) of the present embodiment, the movable body 3 is supported by the swing fulcrum 180 of the fixed body 200 so as to be swingable. If 500 is operated, the movable body 3 can be swung around the swing fulcrum 180. Therefore, even when the optical unit 100 is shaken due to camera shake or the like, the shake can be corrected by swinging the movable body 3.

  The flexible wiring board 400 is connected to the movable body side substrate holding portion 380 of the movable body 3 on one side Y1 in the Y axis direction, and the rear end portion 3b of the movable body 3 in the optical axis direction and the bottom plate portion 710 of the fixed body 200. Extending toward the other side Y2 and held by the fixed body side substrate holding portion 280 of the fixed body 200. For this reason, since the flexible wiring board 400 passes only once between the optical axis direction rear end portion 3b of the movable body 3 and the bottom plate portion 710 of the fixed body 200, the rear side of the movable body 3 in the optical axis direction. The space between the end 3b and the bottom plate portion 710 of the fixed body 200 is narrow. Therefore, the dimension of the optical unit 100 in the optical axis direction can be reduced.

  Moreover, since the flexible wiring board 400 is held by the fixed body side substrate holding portion 280 of the fixed body 200 on the other side Y2 in the Y-axis direction, the flexible wiring board 400 is outside the holding position of the flexible wiring board 400 by the fixed body 200. Even if a force is applied to 400, the influence of the force does not reach the movable body 3.

  Furthermore, in the fixed body side substrate holding portion 280 that holds the flexible wiring substrate 400 on the fixed body 200 side, the flexible wiring substrate 400 is held by an elastic portion 732 that is elastically deformable in the Z-axis direction along the optical axis L. For this reason, even when the movable body 3 is displaced to one side Y1 in the Y-axis direction (the side opposite to the holding position by the fixed body 200) as indicated by an arrow Y0 due to an external impact, the displacement is not elastic. Absorbed by deformation of the portion 732 into the arrow Z0. For this reason, even when the movable body 3 is displaced to one side Y1 in the Y-axis direction (the side opposite to the holding position by the fixed body 200), the flexible wiring board 400 is not excessively strained. Can be avoided.

  In addition, when forming the elastic portion 732 in the plate-like portion 730, the notch 731 is formed so as to narrow the dimension of the plate-like portion 730 in the X-axis direction, and is more elastic on the tip side than the notch 731 of the plate-like portion 730. Part 732 is configured. For this reason, an elastic part can be formed easily rather than the case where an elastic part is comprised by making the plate-shaped part 730 thin.

  The elastic portion 732 is a portion on the tip side of the plate-like portion 730 that protrudes in the direction away from the optical axis L in the bottom plate portion 710 of the lower case 700. For this reason, the fixed body side substrate holding part 280 and the movable body side substrate holding part 380 are separated. Therefore, it extends obliquely from the rear end portion 3b in the optical axis direction of the movable body 3 to the rear side in the optical axis direction (between the rear end portion 3b in the optical axis direction of the movable body 3 and the bottom plate portion 710 of the fixed body 200). Since the part 420 to be processed is long, the flexible wiring board 400 is easily bent.

  The elastic portion 732 is a metal plate-like portion 730 that protrudes in a direction away from the optical axis L in the bottom plate portion 710 of the lower case 700. For this reason, it is not necessary to add a new member to configure the elastic portion 732.

  Further, the held portion 405 of the flexible wiring board 400 is held by fixing with the adhesive on the fixed body side substrate holding portion 280 of the fixed body 200, and the portion held on the fixed body 200 in the flexible wiring board 400 A reinforcing plate 480 is affixed. For this reason, the held portion 405 of the flexible wiring board 400 can be reliably fixed to the fixed body 200.

  The elastic portion 732 (fixed body side substrate holding portion 280) has a groove 736 formed on the surface of the flexible wiring board 400 that overlaps the held portion 405, and at a position that overlaps the center of the groove 736 in the X-axis direction. A through hole 737 is formed. Further, a through hole 485 is formed in the held portion 405 and the reinforcing plate 480 of the flexible wiring board 400, and a through hole 737 is formed in the elastic portion 732 that overlaps the reinforcing plate 480 in the optical axis direction in the fixed body 200. In addition, a groove 736 is formed. Therefore, when the flexible wiring board 400 is fixed to the elastic portion 732 with an adhesive, the through holes 485 and 737 can be used as adhesive injection holes, and the groove 736 can be used as an adhesive reservoir. In addition, the flexible wiring board 400 and the elastic portion 732 of the fixed body 200 are bonded to each other at the edges of the through holes 485 and 737. For this reason, the flexible wiring board 400 and the fixed body 200 can be firmly fixed.

  Further, the dimension in the X-axis direction of the elastic part 732 is equal to the dimension in the X-axis direction of the portion (held part 405) overlapping the elastic part 732 in the flexible wiring board 400. Further, the groove 736 is formed in the entire X-axis direction of the elastic portion 732. Therefore, the groove 736 overlaps the entire X axis direction with respect to the held portion 405 of the flexible wiring board 400. Therefore, the elastic portion 732 and the held portion 405 of the flexible wiring board 400 can be securely bonded and fixed.

[Embodiment 2]
In the first embodiment, the fixed body-side substrate holding portion 280 is provided with the elastic portion that can be elastically deformed in the Z-axis direction along the optical axis L. However, the movable body-side substrate is held on the side plate portion 140 of the case 14 of the movable body 3. A portion 380 may be provided, and an elastic portion that is elastically deformable in the Z-axis direction along the optical axis L may be provided for the movable body side substrate holding portion 380.

[Embodiment 3]
In the first embodiment, the adhesive used for fixing the movable body side substrate holding portion 380 of the movable body 3 and the flexible wiring substrate 400, and the fixing of the fixed body side substrate holding portion 280 of the fixed body 200 and the flexible wiring substrate 400 are used. As the adhesive to be used, a hard adhesive may be used, but an adhesive having elasticity may be used. According to the adhesive having elasticity, the tension of the flexible wiring board 400 can be relieved by deformation of the adhesive in the Z-axis direction.

[Other embodiments]
In the above embodiment, the example in which the present invention is applied to the optical unit 100 used in the camera-equipped mobile phone has been described. However, the present invention may be applied to the optical unit 100 used in a thin digital camera or the like. In the above embodiment, the example in which the lens driving mechanism is configured in the imaging unit 1 has been described. However, the present invention is applied to a fixed focus type optical unit in which the lens driving mechanism is not mounted in the imaging unit 1. Also good.

  In the above embodiment, the pivot portion 31 of the swing fulcrum 180 is configured on the movable body 3 side. However, a configuration is adopted in which the pivot portion 31 of the swing fulcrum 180 is formed on the fixed body 200 side. May be.

  Furthermore, the optical unit 100 with a shake correction function to which the present invention is applied is fixed in a device having vibrations at regular intervals, such as a refrigerator or the like, in addition to a mobile phone, a digital camera, etc. It can also be used for a service that can obtain information inside the refrigerator when going out, for example, when shopping. In such a service, since it is a camera system with a posture stabilization device, a stable image can be transmitted even if the refrigerator vibrates. Further, the present apparatus may be fixed to a device worn at the time of attending school, such as a student's bag, a student's bag, a school bag, or a hat. In this case, when the surroundings are photographed at regular intervals and the image is transferred to a predetermined server, the guardian or the like can observe the image in a remote place to ensure the safety of the child. In such an application, a clear image can be taken even if there is vibration during movement without being aware of the camera. If a GPS is installed in addition to the camera module, the location of the target person can be acquired at the same time. In the event of an accident, the location and situation can be confirmed instantly. Furthermore, if the optical unit 100 with a shake correction function to which the present invention is applied is mounted at a position where the front can be photographed in an automobile, it can be used as a drive recorder. In addition, the optical unit 100 with a shake correction function to which the present invention is applied is mounted at a position where the front of the vehicle can be photographed, and peripheral images are automatically photographed at regular intervals and automatically transferred to a predetermined server. Also good. Further, by distributing this image in conjunction with traffic jam information such as a car navigation road traffic information communication system, the traffic jam status can be provided in more detail. According to such a service, the situation at the time of an accident or the like can be recorded unintentionally by a third party who has passed unintentionally as well as a drive recorder mounted on a car, and can be used for inspection of the situation. In addition, a clear image can be acquired without being affected by the vibration of the automobile. In such an application, when the power is turned on, a command signal is output to the control unit, and shake control is started based on the command signal.

  Further, the optical unit 100 with a shake correction function to which the present invention is applied may be applied to shake correction of an optical device that emits light, such as a laser pointer, a portable or vehicle-mounted projection display device, or a direct-view display device. Good. Further, it may be used for observation without using an auxiliary fixing device such as a tripod for observation at a high magnification such as an astronomical telescope system or a binoculars system. In addition, by using a sniper rifle or a gun barrel such as a tank, the posture can be stabilized against vibration at the time of triggering, so that the accuracy of hitting can be improved.

DESCRIPTION OF SYMBOLS 1 Imaging unit 3 Movable body 14 Case 30 Rigid board 100 Optical unit 180 with a shake correction function Swing fulcrum 200 Fixed body 250 Upper cover (fixed body)
280 Fixed body side substrate holding portion 380 Movable body side substrate holding portion 400 Flexible wiring board 401 Bending portion 480 Reinforcement plate 500 Shaking correction driving mechanism 520 Permanent magnet 560 Coil portion 600 Spring member 700 Lower cover (fixed body)
710 Bottom plate portion 730 Plate-like portion 732 Elastic portion 736 Groove 737 Through hole

Claims (12)

A movable body holding an optical element;
A fixed body that swingably supports the movable body;
A drive mechanism for swinging the movable body;
The movable body side substrate holding part provided on one side in the first direction orthogonal to the optical axis of the movable body passes through the rear side of the movable body in the direction in which the optical axis extends, and A flexible wiring board held by a fixed body side board holding portion provided on the other side in the first direction;
Have
At least one of the movable body side substrate holding portion and the fixed body side substrate holding portion includes an elastic portion that is elastically deformable in a direction along the optical axis, and the flexible wiring board is fixed to the elastic portion. An optical unit characterized by.   2. The optical unit according to claim 1, wherein the elastic portion has a notch formed in a plate-like portion extending in a direction intersecting the optical axis. The notch is formed so as to narrow the dimension of the plate-like portion in the second direction perpendicular to the optical axis and the first direction,
The optical unit according to claim 2, wherein the elastic portion is configured by a tip side from the notch of the plate-like portion.   The optical unit according to claim 3, wherein the plate-like portion is made of metal.   The said plate-shaped part is extended in the direction spaced apart from the said optical axis in the said 1st direction, The said elastic part is comprised by the front end side of the said plate-shaped part, The Claim 3 or 4 characterized by the above-mentioned. The optical unit described. The said elastic part and the said flexible wiring board are being fixed by the adhesive agent provided in the overlapping part of the said elastic part and the said flexible wiring board, The Claim 3 thru | or 5 characterized by the above-mentioned. The optical unit described. The elastic portion includes a bottomed groove formed on a surface overlapping the flexible wiring board, and the groove
The optical unit according to claim 6, wherein a through hole that overlaps a part of the optical unit is formed.   The optical unit according to claim 7, wherein the groove overlaps the entire flexible wiring board in the second direction.   The dimension in the second direction of the elastic part is the same as the dimension in the second direction of a portion of the flexible wiring board that overlaps the elastic part. The optical unit described.   The optical unit according to claim 6, wherein the adhesive has elasticity. The optical unit according to any one of claims 6 to 10, wherein a reinforcing plate is attached to a portion of the flexible wiring board that is fixed to the elastic portion. The fixed body includes a bottom plate portion facing the movable body on the rear side in the direction in which the optical axis extends, and a cylindrical body portion that covers the movable body,
The fixed body side substrate holding portion is configured on the bottom plate portion,
The optical unit according to claim 1, wherein the elastic part is formed at least on the fixed body side substrate holding part.

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