WO2010134555A1 - Blur correction device - Google Patents

Abstract

Provided is a blur correction device for correcting an image blur by moving an image capturing element in a first direction and a second direction on a plane parallel to a light-receiving surface of the image capturing element, the blur correction device being provided with a base portion, a single holding portion for holding the image capturing element, a supporting portion for supporting the holding portion so that the holding portion is movable in a direction along the plane with respect to the base portion, first and second driving sources for generating driving force for moving the holding portion in the first and second directions, first and second driven portions for receiving the driving force generated by the first and second driving sources, the first and second driven portions being provided in the holding portion, and a guiding portion for moving the holding portion also in the second direction while allowing the holding portion to move in the first direction.

Description

Blur correction device

The present invention relates to a shake correction apparatus that moves an image sensor on a plane parallel to a light receiving surface.

An image stabilization apparatus that reduces image blurring on an imaging plane by moving an image sensor or a lens disposed on an optical axis of an image pickup lens in accordance with the movement of the image pickup apparatus in an image pickup apparatus such as a camera. Are known. For example, Japanese Patent Application Laid-Open No. 2008-48220 discloses a shake correction apparatus.

Japanese Patent Laid-Open No. 2008-48220 discloses a shake correction apparatus that moves an image sensor in a direction along two axes of an X axis and a Y axis perpendicular to each other on a plane parallel to a light receiving surface. It has the composition to make it. Japanese Patent Application Laid-Open No. 2008-48220 discloses a shake correction apparatus that includes a second moving frame that moves along the X axis on a first moving frame that is supported by a base and moves along the Y axis. And an image sensor is arranged on the second moving frame.

In a configuration using two moving frames as disclosed in Japanese Patent Application Laid-Open No. 2008-48220, the number of parts increases, so the inertial mass of the moving member increases. For this reason, if an attempt is made to improve the follow-up to the movement control of the image sensor during blur correction, a large driving force is required, which hinders downsizing and power saving of the apparatus.

The present invention has been made in view of the above problems, and is a shake correction apparatus that moves an image sensor on a plane parallel to a light receiving surface, and can be downsized with a simpler structure. An object is to provide a shake correction apparatus.

A shake correction apparatus according to the present invention is a shake correction apparatus that corrects image shaking by moving an image sensor in a first direction and a second direction on a plane parallel to a light receiving surface of the image sensor. A base unit, a single holding unit that holds the imaging element, and a support unit that supports the holding unit movably in the direction along the plane with respect to the base unit, A first driving source that generates a driving force for moving the holding portion relative to the base portion in the first direction; and the holding portion relative to the base portion in the second direction. A second driving source that generates a driving force to be moved, a first driven unit that is provided in the holding unit and receives a driving force generated by the first driving source, and a second driving source that is provided in the holding unit. A second driven unit that receives a driving force generated by a driving source; and A first guide portion for guiding the holding portion to move in the first direction while allowing the movement in the direction, and allowing the holding portion to move in the first direction, A second guide portion for guiding the holding portion to move in the second direction.

It is a perspective view which shows the front side of an imaging device. It is a perspective view of the blurring correction apparatus of 1st Embodiment. It is a disassembled perspective view of the blurring correction apparatus of 1st Embodiment. It is the front view which looked at the front side of the shake amendment device of a 1st embodiment along the axis which intersects perpendicularly with the light-receiving surface. It is a side view which shows the side surface by which the rocking | fluctuation part of the blurring correction apparatus of 1st Embodiment was provided. It is a perspective view of the holding | maintenance part of 1st Embodiment. It is a figure for demonstrating the relationship between the holding | maintenance part and drive part of 1st Embodiment. It is a fragmentary sectional view for explaining the composition of the 1st drive part of a 1st embodiment. It is a fragmentary sectional view for explaining the composition of the 2nd drive part of a 1st embodiment. It is a figure for demonstrating the relationship between the rocking | swiveling part and engagement part of 1st Embodiment. It is a figure which shows the 1st modification of 1st Embodiment. It is a figure which shows the 2nd modification of 1st Embodiment. It is a figure which shows the 3rd modification of 1st Embodiment. It is a perspective view of the blurring correction apparatus of 2nd Embodiment. It is a disassembled perspective view of the blurring correction apparatus of 2nd Embodiment. It is the front view which looked at the front side of the blurring correction apparatus of 2nd Embodiment along the axis | shaft orthogonal to a light-receiving surface. It is a front view of the base part of 2nd Embodiment. It is a front view of the holding | maintenance part of 2nd Embodiment. It is a side view of the holding | maintenance part of 2nd Embodiment. It is sectional drawing for demonstrating the support structure of the 1st rotation cam member and 2nd rotation cam member of 2nd Embodiment. It is sectional drawing explaining the shape of the rotation cam part of 2nd Embodiment. It is a figure for demonstrating angle (theta) and distance R of 2nd Embodiment. It is a cam diagram of the rotation cam part of 2nd Embodiment. It is an enlarged view of the rotation cam part and cam groove of 2nd Embodiment. It is an enlarged view of the rotating cam part of the modification of 2nd Embodiment. It is a cam diagram of the rotation cam part of the modification of 2nd Embodiment. It is sectional drawing for demonstrating the relationship between the rotating cam part and cam groove of the modification of 2nd Embodiment.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In each drawing used for the following description, the scale is different for each component in order to make each component large enough to be recognized on the drawing. It is not limited only to the quantity of the component described in the figure, the shape of the component, the ratio of the size of the component, and the relative positional relationship of each component.

(First embodiment)
First, the configuration of the imaging apparatus 10 including the shake correction apparatus 20 of the present invention will be described with reference to FIG. As shown in FIG. 1, the imaging device 10 is configured by including an imaging lens 3 a held by a lens barrel 3 and an imaging element 13 disposed on the optical axis O of the imaging lens 3 a. It is a digital camera. Although not shown, the imaging device 1 is provided with a displacement detection unit including a gyro sensor or the like for detecting the amount of movement of the imaging device 1 on a predetermined axis.

The image pickup device 13 outputs an electrical signal corresponding to light incident on the light receiving surface 13a at a predetermined timing, and is generally called a CCD (charge coupled device) or a CMOS (complementary metal oxide semiconductor) sensor, for example. The image pickup device of the type to be used or other various types can be applied.

The image sensor 13 is held at a predetermined position in the housing 10 a via the shake correction device 20. Although details will be described later, the shake correction apparatus 20 moves the image pickup element 13 on a plane orthogonal to the optical axis O of the image pickup lens 3a according to the movement amount of the image pickup apparatus 1 to thereby detect the light receiving surface 13a of the image pickup element 13. This is to reduce blurring of the subject image above.

In the imaging device 1 of the present embodiment shown in FIG. 1, the lens barrel that houses the imaging lens 3a is configured integrally with the housing 10a. However, the lens barrel 3 of the imaging lens 3a is in contrast to the housing 10a. And may be removable.

Next, the configuration of the shake correction apparatus 20 will be described with reference to FIGS. The shake correction apparatus 20 holds the image pickup device 13 so that the light receiving surface 13a of the image pickup device 13 is orthogonal to the optical axis O of the image pickup lens 3a, and the image pickup devices 13 cross each other on a plane parallel to the light receiving surface 13a. It is configured to be movable within a predetermined movement range along two (perpendicular) movement axes.

The shake correction device 20 is roughly a base portion 30 whose position is fixed with respect to the optical axis O of the imaging lens 3a, and a plane parallel to the light receiving surface 13a of the imaging device 13 with respect to the base portion 30. The holding unit 100 is movably supported above, and includes a drive unit that moves the holding unit 100 with respect to the base unit 30. The holding unit 100 holds the image sensor 13 such that the light receiving surface 13 a is orthogonal to the optical axis O. The driving unit is configured to generate a driving force that causes the holding unit 100 to move relative to the base unit 30 along movement axes that intersect each other on a plane orthogonal to the optical axis O.

Here, in the following description, the direction along the optical axis O, that is, the direction along the axis orthogonal to the light receiving surface 13a of the image sensor 13 is defined as the Z direction, and intersects each other on a plane parallel to the light receiving surface 13a of the image sensor 13. One of the two directions along the two movement axes is the X direction (second direction) and the other is the Y direction (first direction). In the present embodiment, as an example, the X direction and the Y direction are orthogonal to each other, and the X direction is along the long side of the light receiving surface 13 a of the image sensor 13. In the Z direction, when the direction from the light receiving surface 13a of the image sensor 13 toward the imaging lens 3a side is particularly limited, this is referred to as the front, and the opposite is referred to as the rear.

More specifically, the shake correction device 20 includes a base unit 30, a swing unit 80, a holding unit 100, a support unit, and a drive unit.

The base unit 30 is a member whose position is fixed with respect to the optical axis O of the imaging lens 3a. In this embodiment, the base unit 30 is fixed inside the housing 10a of the imaging device 1. The base unit 30 may constitute a part of a lens barrel that houses the imaging lens 3a.

The base part 30 has a frame-like frame-shaped part 31 provided with an opening 31a. The holding part 100 is disposed behind the base part 30. The image sensor 13 held by the holding unit 100 is exposed to the front of the blur correction device 20 through the opening 31 a of the frame-shaped part 31. Further, the support portion, the swinging portion 80, and the driving portion are disposed on the outer peripheral portion of the frame-shaped portion 31 of the base portion 30.

As shown in FIG. 3 and FIG. 4, convex portions 41, 42, and 43 that protrude outward are provided at three locations on the outer peripheral portion of the base portion 30. The three convex portions 41, 42, and 43 are engaged with sandwiching portions 111, 112, and 113 provided on the holding portion 100 described later, thereby allowing the holding portion 100 to receive the light receiving surface 13 a with respect to the base portion 30. The support part which supports so that a movement is possible on the plane parallel to is comprised. The sandwiching portions 111, 112, and 113 constitute a guide portion that moves the holding portion 100 along a plane parallel to the light receiving surface 13a.

Further, the base portion 30 is provided with a pair of swing shaft support portions 32 and 33 for supporting the swing shaft 91 which is a shaft member. In this embodiment, the oscillating shaft support portions 32 and 33 protrude from the outer peripheral portion of the frame-shaped portion 31 in the form of a tongue piece on one side in the X direction (right side as opposed to FIG. 4), and are predetermined in the Y direction. Are spaced apart by a distance of.

The through shaft through which the swing shaft 91 is inserted is formed in the swing shaft support portions 32 and 33. The swing shaft 91 is inserted through through holes formed in the swing shaft support portions 32 and 33 so as to extend in parallel to the light receiving surface 13a of the image sensor 13 and in parallel to the short side of the light receiving surface 13a. Supported. In other words, the swing shaft 91 extends parallel to the Y direction. As will be described in detail later, the swing shaft 91 is a member for supporting the base end portion 81 of the swing portion 80 so as to be swingable with respect to the base portion 30.

Further, the base unit 30 is provided with drive mechanism support units 50 and 60 for supporting a drive unit described later in detail. The drive mechanism support portions 50 and 60 are provided on the outer peripheral portion of the frame-shaped portion 31 of the base portion 30 on the side where the swing shaft support portions 32 and 33 are provided.

The oscillating portion 80 is formed with a through hole through which the aforementioned oscillating shaft 91 can be inserted in the base end portion 81, and a guide shaft 92, which is a shaft member, can be inserted in the distal end portion 82 in parallel with the oscillating shaft 91. This is a member in which a through hole is formed. As shown in FIG. 9, the swinging portion 80 has a predetermined length L <b> 1 in the axial direction of the swinging shaft 91 and the guide shaft 92. The swinging portion 80 and the swinging shaft 91 may be integrally formed. Further, the swinging portion 80 and the guide shaft 92 may be integrally formed.

With the base end portion 81 of the oscillating portion 80 disposed between the oscillating shaft support portions 32 and 33, the oscillating portion 80 is The base part 30 is supported so as to be able to swing. That is, the swinging portion 80 can swing around the swinging shaft 91 parallel to the light receiving surface 13 a with respect to the base portion 30.

In the present embodiment, the tip portion 82 that is the tip of the swing of the swing portion 80 extends substantially rearward of the optical axis O. Therefore, the guide shaft 92 inserted through the through hole of the tip end portion 82 is disposed so as to be parallel to the swing shaft 91 and overlap the swing shaft 91 when viewed from a direction orthogonal to the light receiving surface 13a. Is done.

As described above, the holding unit 100 holds the image sensor 13 behind the base unit 30 and is supported so as to be movable on a plane parallel to the light receiving surface 13 a of the image sensor 13 with respect to the base unit 30. It is a member.

In this embodiment, as shown in FIGS. 3 and 6, the holding unit 100 has a substantially flat plate-like image sensor holding unit 101 that holds the image sensor 13 in the center. The image sensor 13 is fixed to the image sensor holding unit 101 via a circuit board (not shown).

The image sensor holding unit 101 is provided with clamping units 111, 112, and 113 at three locations surrounding the periphery of the image sensor 13. The three sandwiching portions 111, 112, and 113 are disposed at positions corresponding to the three convex portions 41, 42, and 43 provided on the outer peripheral portion of the base portion 30, respectively.

The clamping parts 111, 112, and 113 are engaged with the convex parts 41, 42, and 43 so as to clamp the convex parts 41, 42, and 43 in the Z direction, so The support part supported so that a movement is possible is comprised.

Specifically, the sandwiching portions 111, 112, and 113 sandwich the convex portions 41, 42, and 43 with a predetermined gap in the Z direction or with a predetermined force. Thereby, the convex parts 41, 42, and 43 are restricted from moving in the Z direction with respect to the sandwiching parts 111, 112, and 113, and can slide in the X direction and the Y direction.

In other words, the support portion composed of the convex portions 41, 42, and 43 in the present embodiment and the sandwiching portions 111, 112, and 113 that sandwich the convex portions 41, 42, and 43 in the Z direction is formed by supporting the holding portion 100 by three-point support using a so-called slide bearing. It has the structure supported with respect to the base part 30. FIG. And this support part supports the holding | maintenance part 100 so that a movement only about the direction along the plane parallel to the light-receiving surface 13a with respect to the base part 30 is possible. Here, it is needless to say that the movable range of the holding unit 100 relative to the base unit 30 limited by the support unit is larger than the necessary moving range of the image sensor 13 by the shake correction device 20.

In addition, the tip of the swinging portion 80 is located on one side of the holding portion 100 in the X direction (right side as opposed to FIG. 4), that is, on the side where the swinging shaft support portions 32 and 33 of the base portion 30 are disposed. Engaging portions 120 and 121 that engage with the guide shaft 92 disposed in the portion 82 are provided.

In the present embodiment, the engaging portions 120 and 121 protrude to the front side in the Z direction (front side as opposed to FIG. 4), and are spaced apart from each other in the Y direction.

Here, as shown in FIG. 9, the distance L2 between the engaging portions 120 and 121 in the Y direction is such that the tip 82 of the swinging portion 80 having the length L1 is a predetermined distance between the engaging portions 120 and 121. It is a distance that can be disposed with a gap ΔL (that is, ΔL = L2−L1). The gap ΔL in the Y direction generated between the engaging portions 120 and 121 and the tip end portion 82 of the swinging portion 80 is larger than the necessary movable distance in the Y direction of the image sensor 13 by the shake correction device 20. .

The engaging portions 120 and 121 hold the guide shaft 92 disposed in the tip portion 82 of the swinging portion 80 and extending in the Y direction with a predetermined slight gap in the X direction or predetermined Holes (recesses) 120a and 121a for holding with force are formed.

That is, the guide shaft 92 is precisely fitted in the holes 120a and 121a in the X direction. In other words, the guide shaft 92 and the holes 120a and 121a have a clearance fit with a slight gap that does not interfere with the shake correction operation by the shake correction device 20 in the X direction, or the shake correction by the shake correction device 20 in the X direction. This is a so-called intermediate fit state that results in a slight interference fit with friction that does not interfere with operation.

The holes 120a and 121a are through holes formed on substantially the same axis along the Y direction in the engaging parts 120 and 121, and restrict the relative movement of the guide shaft 92 in the X direction with respect to the holding part 100. The guide shaft 92 is allowed to move relative to the holding unit 100 in the Y direction and the Z direction.

Specifically, in the present embodiment, the holes 120a and 121a are oval through holes referred to as so-called long holes in which the Z direction is the major axis direction when viewed from the Y direction. The inner peripheral surface portions of the holes 120a and 121a are in contact with the guide shaft 92 only from the minor axis direction (X direction). In the present embodiment, in consideration of workability when the guide shaft 92 is inserted into the holes 120a and 121a, the holes 120a and 121a are opened forward in the Z direction.

Further, since the engaging portions 120 and 121 are separated from each other in the Y direction, the guide shaft 92 is inserted into the holes 120a and 121a, so that the guide shaft 92 is parallel to the light receiving surface 13a with respect to the holding portion 100. Relative rotation on the plane (rotation around the optical axis O) is restricted.

On one side of the holding unit 100 in the X direction (on the right side in FIG. 4), a first driving engagement unit 130 and a second driving unit which are engaged with a driving unit described later in detail. A second driving engagement portion 140 that is a driven portion is provided. The first drive engagement portion 130 and the second drive engagement portion 140 are generally applied to the base portion 30 by receiving a force generated by the drive portion disposed on the base portion 30. This is for moving the holding unit 100. Further, origin detection dogs 133 and 143 used for the origin return operation of the drive unit are provided in the vicinity of the first drive engagement unit 130 and the second drive engagement unit 140.

Detailed configurations of the first drive engagement portion 130 and the second drive engagement portion 140 will be described below together with the configuration of the drive portion.

As shown in FIGS. 3 and 4, the driving unit applies the first driving unit 200 that generates a force for moving the holding unit 100 in the X direction with respect to the base unit 30, and the base unit 30. The second drive unit 300 generates a force for moving the holding unit 100 in the Y direction. The first drive unit 200 and the second drive unit 300 are supported by the drive mechanism support units 50 and 60 of the base unit 30, respectively.

The first drive unit 200 rotates integrally with a first motor 201 as a first drive source composed of, for example, a pulse motor, a reduction gear 202 that is a pinion gear, a reduction gear 203 that has more teeth than the reduction gear 202, and a reduction gear 203. The first lead screw 204, the first nut 205, and the first biasing spring 93, which are first male screw portions, are mainly configured. The first motor 201 generates a driving force for rotating the first lead screw 204 via the reduction gear 202 and the reduction gear 203.

The first motor 201 has a female screw portion 201a at a flange portion extending in the radial direction of the rotation shaft from the seating surface. The first motor 201 is fixed to the base portion 30 by sandwiching the drive mechanism support portion 50 between the head of the screw 52 screwed into the female screw portion 201. Further, a lead screw support 51 is sandwiched between the drive mechanism support 50 and the head of the screw 52.

As shown in FIG. 8, the lead screw 204 is supported at both ends by a drive mechanism support portion 50 and a lead screw support portion 51, and is rotatable about an axis along the X direction with respect to the base portion 30. It is supported by. The reduction gears 202 and 203 are fixed to the rotation shaft of the first motor 201 and the lead screw 204, respectively, and are arranged to mesh with each other. That is, the lead screw 204 rotates around an axis along the X direction in accordance with the rotation of the rotation shaft of the first motor 201.

The first nut 205 is a member having a female screw portion that is screwed into the lead screw 204. The first nut 205 is capable of advancing and retreating in the X direction with respect to the base portion 30 in a state of being screwed to the first lead screw 204, and the rotation around the axis along the X axis is restricted. For this reason, the first nut 205 moves forward and backward in the X direction according to the rotation of the lead screw 204.

The first driving engagement portion 130 provided in the holding portion 100 described above has a shape that can contact the first nut 205 from the X direction. In the present embodiment, as shown in FIGS. 7 and 8, the first driving engagement portion 130 is arranged in the Z direction from the holding portion 100 so as to be disposed between the first nut 205 and the reduction gear 203. It has a shape that protrudes forward.

The first driving engagement portion 130 is formed with a hole portion 131 that is drilled in the X direction in order to avoid interference with the first lead screw 204. In other words, the hole 131 is a through hole through which the lead screw 204 is inserted with a predetermined gap, and when the holding unit 100 moves in the X direction and the Y direction with respect to the base unit 30. The shape does not interfere with the first lead screw 204. That is, the first lead screw 204 and the hole 131 are completely loosely fitted without contact with each other.

Specifically, in the present embodiment, as shown in FIG. 9, the hole 131 is an oblong through hole called a so-called long hole with the Y direction as the major axis direction when viewed from the X direction. In the present embodiment, the hole 131 is opened in one of the Y directions in consideration of workability when the lead screw 204 is inserted through the hole 131.

The first urging spring 93 engages with the base portion 30 and the holding portion 100, so that the holding portion 100 is moved to the first nut 205 along the X direction as indicated by an arrow F <b> 1 in FIGS. 7 and 8. It is a member which urges | biases toward. Here, the first urging spring 93 is disposed such that the urging force in the X direction is generated regardless of the positions in the X direction and the Y direction of the holding unit 100 with respect to the base unit 30. In other words, the first biasing spring 93 is disposed so as not to restrict movement of the holding unit 100 in the X direction and the Y direction with respect to the base unit 30 and to bias the holding unit 100 in the X direction. .

In the present embodiment, the first biasing spring 93 is a so-called torsion coil spring wound around the swing shaft 91, and is a plane orthogonal to the swing shaft 91 due to a torsional moment around the swing shaft 91. The holding portion 100 is urged toward the first nut 205 along the direction along the direction (X direction).

Due to the urging force of the first urging spring 93, the first driving engagement portion 130 always abuts against the first nut 205 regardless of the position of the holding portion 100 in the X direction and the Y direction with respect to the base portion 30. It will be in the state. Therefore, the holding part 100 provided with the first driving engagement part 130 moves in the X direction as the first nut 205 moves forward and backward. That is, the holding unit 100 moves back and forth in the X direction with respect to the base unit 30 according to the rotation of the rotation shaft of the first motor 201.

Further, since the urging force of the first urging spring 93 is also applied to the first nut 205, the backlash between the first nut 205 and the first lead screw 204 and the axial support of the first lead screw 204 are supported. Play is eliminated.

As described above, the first driving unit 200 engages with the first driving engagement unit 130 provided in the holding unit 100, thereby causing the holding unit 100 to move in the X direction, that is, a plane orthogonal to the swing shaft 91. It is possible to move in the direction along

Also, the first driving unit 200 is provided with a first origin detection sensor 53 that is a photo interrupter for detecting the origin detection dog 133 provided in the holding unit 100. The output of the first origin detection sensor 53 is used during the origin return operation of the first motor 201.

On the other hand, the second drive unit 300 is integrated with a second motor 301 as a second drive source composed of, for example, a pulse motor, a reduction gear 302 that is a pinion gear, a reduction gear 303 that has more teeth than the reduction gear 302, and a reduction gear 303. The second lead screw 304, the second nut 305, and the second urging spring 94, which are second male screw portions that rotate, are mainly configured. The second motor 301 generates a driving force for rotating the second lead screw 305 via the reduction gear 302 and the reduction gear 303.

The second motor 301 has a female screw portion 301a at a flange portion extending in the radial direction of the rotation shaft from the seat surface. The second motor 301 is fixed to the base portion 30 by sandwiching the drive mechanism support portion 60 between the head of the screw 62 screwed into the female screw portion 301. A lead screw support 61 is sandwiched between the drive mechanism support 60 and the head of the screw 62.

As shown in FIG. 9, the lead screw 304 is supported at both ends by a drive mechanism support portion 60 and a lead screw support portion 61, and can rotate around an axis along the Y direction with respect to the base portion 30. It is supported by. The reduction gears 302 and 303 are fixed to the rotation shaft of the second motor 301 and the lead screw 304, respectively, and are arranged so as to mesh with each other. That is, the lead screw 304 rotates around an axis along the Y direction in accordance with the rotation of the rotation shaft of the second motor 301.

The second nut 305 is a member having a female screw portion that is screwed into the lead screw 304. When the second nut 305 is screwed into the second lead screw 304, the second nut 305 can move forward and backward in the Y direction with respect to the base portion 30, and the rotation about the axis along the Y axis is restricted. For this reason, the second nut 305 moves forward and backward in the Y direction according to the rotation of the lead screw 304.

The second driving engagement portion 140 provided in the holding portion 100 described above has a shape capable of coming into contact with the second nut 305 from the Y direction. In the present embodiment, as shown in FIGS. 7 and 9, the second drive engagement portion 140 is arranged in the Z direction from the holding portion 100 so as to be disposed between the second nut 305 and the reduction gear 303. It has a shape that protrudes forward.

The second driving engagement portion 140 is formed with a hole portion 141 formed in the Y direction in order to avoid interference with the second lead screw 304. In other words, the hole 141 is a through-hole through which the lead screw 304 is inserted with a predetermined gap, and when the holding part 100 moves in the X direction and the Y direction with respect to the base part 30. The shape does not interfere with the second lead screw 304. That is, the second lead screw 304 and the hole 141 are completely loosely fitted without contact with each other.

Specifically, in the present embodiment, as shown in FIG. 7, the hole 141 is an oval through-hole called a so-called long hole with the X direction as the major axis direction when viewed from the Y direction. In the present embodiment, the hole 141 is opened in one of the X directions in consideration of workability when the lead screw 304 is inserted through the hole 141.

The second urging spring 94 engages with the base portion 30 and the holding portion 100, whereby the holding portion 100 is moved to the second nut 305 along the Y direction as indicated by an arrow F2 in FIGS. It is a member which urges | biases toward. Here, the second urging spring 94 is arranged such that the urging force in the Y direction is generated regardless of the positions of the holding unit 100 in the X direction and the Y direction with respect to the base unit 30. In other words, the second biasing spring 94 is disposed so as not to restrict the movement of the holding unit 100 in the X direction and the Y direction with respect to the base unit 30 and to bias the holding unit 100 in the Y direction. .

In the present embodiment, one end of the second biasing spring 94 is wound around the guide shaft 92, and the other end is wound around the screw end portion of the screw 62, thereby supporting the engaging portion 121 and the lead screw. It is a so-called compression spring disposed between the portions 61, and biases the holding portion 100 toward the second nut 305 in a direction along the guide shaft 92 (Y direction).

Due to the urging force of the second urging spring 94, the second driving engagement portion 140 always abuts against the second nut 305 regardless of the position of the holding portion 100 in the X direction and the Y direction with respect to the base portion 30. It will be in the state. Therefore, the holding part 100 provided with the second driving engagement part 140 moves in the Y direction as the second nut 305 moves forward and backward. That is, the holding unit 100 moves back and forth in the Y direction with respect to the base unit 30 according to the rotation of the rotation shaft of the second motor 301. The first driving engagement unit 30 and the second driving engagement unit 140 allow the holding unit 100 to move in the X direction and the Y direction while allowing each other to move even when receiving the driving force at the same time. Move to.

Further, since the urging force of the second urging spring 94 is also applied to the second nut 305, the backlash between the second nut 305 and the second lead screw 304 and the axial support of the second lead screw 304 are supported. Play is eliminated.

As described above, the second drive unit 300 moves the holding unit 100 in the Y direction, that is, the direction along the guide shaft 92 by engaging with the second driving engagement unit 140 provided in the holding unit 100. It is possible to make it.

Although not shown, the second driving unit 300 is provided with a second origin detection sensor that is a photo interrupter for detecting the origin detection dog 143 provided in the holding unit 100. The output of the second origin detection sensor is used during the origin return operation of the second motor 301.

The operation of the configuration for regulating the moving direction of the image sensor 13 in the shake correction apparatus 20 of the present embodiment having the configuration described above will be described with reference to FIG.

The holding unit 100 includes a convex portion 41, 42, and 43 provided on the base and a holding unit 111, 112, and 113 provided on the holding unit 100 that holds these in the Z direction. The base portion 30 is supported so as to be movable only in a direction along a plane parallel to the light receiving surface 13a.

The holding unit 100 includes engaging portions 120 and 121 that constitute a first engaging portion that engages with a guide shaft 92 disposed at the distal end portion 82 of the swinging portion 80. The engaging portions 120 and 121 engage with the guide shaft 92 while allowing the guide shaft 92 to move in the Z direction with respect to the holding portion 100, and swing around the swing shaft 91 of the swing portion 80. Accordingly, the holding unit 100 is guided to move in the X direction (second direction). That is, in the present embodiment, the engaging portions 120 and 121 constitute a guide portion that moves the holding portion 100 in the X direction while allowing the holding portion 100 to move in the Y direction (first direction). ing.

Further, the engaging portions 120 and 121 of the holding portion 100 constitute a second engaging portion that engages with the guide shaft 92 disposed at the distal end portion 82 of the swinging portion 80. The engaging portions 120 and 121 guide the holding portion 100 so as to move in the Y direction by being slidably engaged along the guide shaft 92. That is, in the present embodiment, the engaging parts 120 and 121 move the holding part 100 in the Y direction while allowing the holding part 100 to move in the X direction.

In addition, the 1st engaging part and the 2nd engaging part which were mentioned above are the same structures, and these are collectively called an engaging part.

Further, the engaging portions 120 and 121 of the holding portion 100 also constitute a rotation restricting portion that engages with the guide shaft 92 disposed at the distal end portion 82 of the swinging portion 80. The engaging portions 120 and 121 regulate the rotation around the axis (optical axis O) orthogonal to the light receiving surface 13a of the holding portion 100 by engaging with the guide shaft 92 in a state of being separated in the Y direction.

That is, in the present embodiment, the swinging portion 80 swinging with respect to the base portion 30 and the engaging portion 120 provided on the holding portion 100 that engages with the swinging tip portion 82 of the swinging portion 80. And 121, the relative movement of the holding unit 100 relative to the base unit 30 on the plane parallel to the light receiving surface 13a is restricted only in the X direction and the Y direction.

In the configuration as described above, when the first motor 201 is driven without driving the second motor 301, the rotation of the rotation shaft of the first motor 201 is decelerated by the reduction gears 201 and 203, and the first lead screw 204 is driven. Rotates slower than the rotation axis of the first motor 201. By the rotation of the first lead screw 204, the first nut 205 moves in the axial direction of the first lead screw 204.

Then, the holding portion 100 that is in contact with the first nut 205 in the first driving engagement portion 130 moves together with the first nut 205 in the X direction according to the rotation amount of the rotation shaft of the first motor 201. Note that if the rotation direction of the rotation shaft of the first motor 201 is reversed, the movement direction of the holding unit 100 in the X direction is also reversed.

At this time, the second drive engagement portion 140 and the second nut 305 are in contact with each other, but the second drive engagement portion 140 and the second nut 305 are in a direction parallel to the contact surface (X direction). ) Only. Accordingly, the holding unit 100 does not move in the Y direction when only the first motor 201 is driven. Further, when the holding unit 100 moves only in the X direction, the second lead screw 304 and the hole 141 of the second driving engagement unit 140 are loosely fitted and thus do not interact with each other.

On the other hand, in the configuration as described above, when the second motor 301 is driven without driving the first motor 201, the rotation of the rotation shaft of the second motor 301 is decelerated by the reduction gears 301 and 303, and the second lead The screw 304 rotates slower than the rotation shaft of the second motor 301. As the second lead screw 304 rotates, the second nut 305 moves in the axial direction of the second lead screw 304.

Then, the holding portion 100 that is in contact with the second nut 305 in the second driving engagement portion 140 moves in the Y direction according to the rotation amount of the rotation shaft of the second motor 301 together with the second nut 305. Note that if the rotation direction of the rotation shaft of the second motor 301 is reversed, the movement direction of the holding unit 100 in the Y direction is also reversed.

At this time, the first drive engagement portion 130 and the first nut 205 are in contact with each other, but the first drive engagement portion 130 and the first nut 205 are in a direction parallel to the contact surface (Y direction). ) Only. Accordingly, the holding unit 100 does not move in the X direction when only the second motor 301 is driven. Further, when the holding unit 100 moves only in the Y direction, the first lead screw 204 and the hole 131 of the first driving engagement unit 130 are loosely fitted and thus do not interact with each other.

In the configuration as described above, when the first motor 201 and the second motor 301 are driven simultaneously, the above-described two actions occur simultaneously, and the holding unit 100 moves in the X direction and the Y direction. The amount of movement of the holding unit 100 in the X direction and the Y direction at this time depends on only the amount of rotation of the rotation shaft of the first motor 201 and the amount of rotation of the rotation shaft of the second motor 301 independently of each other. . That is, in this embodiment, any one of the movements of the holding unit 100 in the X direction and the Y direction is not restricted by the other movement.

As described above, in the shake correction apparatus 20 of the present embodiment, the holding unit 100 that holds the image sensor 13 can be moved in an arbitrary direction along a plane parallel to the light receiving surface 13 a of the image sensor 13.

As described above, in the present embodiment, the movement of the image sensor 13 in the X direction and the Y direction when viewed from the direction along the axis (optical axis O) orthogonal to the light receiving surface 13a of the image sensor 13, that is, the Z direction. A configuration for restricting in two directions and a drive mechanism for moving the holding unit 100 are disposed only on one side in the X direction with respect to the imaging element 13.

In the present embodiment, since the swing shaft 91 and the guide shaft 92 are disposed so as to overlap in the Z direction, a configuration for restricting the movement of the image sensor 13 in two directions, the X direction and the Y direction. 4 has only the thickness of the swinging portion 80 in the X direction when viewed from the Z direction, as shown in FIG.

Therefore, according to the present embodiment, it is not necessary to provide a configuration for restricting the movement of the image sensor in the X direction and the Y direction as in the conventional blur correction apparatus, and it is more than conventional. Miniaturization can be realized.

Further, in the present embodiment, a complicated configuration of holding the image sensor with two moving frames as in the case of the conventional shake correction device is unnecessary, and the image sensor 13 is held only with a single moving frame (holding unit 100). It can be moved in the X direction and the Y direction, and the number of parts can be reduced as compared with the prior art.

Moreover, in this embodiment, since the image pick-up element 13 is moved by a single moving frame (holding unit 100), the inertial mass of the moving object is made smaller than the conventional structure in which the image pick-up element is moved by two moving frames. Thus, the response of movement of the image sensor (followability to electrical control) is improved.

In the present embodiment, support portions for supporting the holding portion 100 with respect to the base portion 30 are provided at three points around the image sensor 13 when viewed from the Z direction. Needless to say, since the configuration is only required to restrict the movement of the holding portion in the Z direction with respect to the base portion 30, it can be realized with a smaller and simpler configuration than the guide shaft member of the conventional shake correction device. Yes.

Further, as in the present embodiment, if the movement of the image sensor 13 is restricted to only the X direction and the Y direction on a plane parallel to the light receiving surface 13a, the image sensor is predetermined by supporting three or more balls. The configuration for detecting the position and controlling the position of the image sensor is easy compared to the configuration in which the image sensor is movably supported on the plane. Simplification of the configuration can be realized.

Moreover, the support part of embodiment mentioned above is the structure which clamps the convex parts 41, 42, and 43 provided in the base part 30 by the clamping parts 111, 112, and 113 provided in the holding | maintenance part 100 in a Z direction. However, the support portion urges the holding portion 100 toward the base portion 30 side by an elastic force or a magnetic force, and arranges three or more balls between the holding portion 100 and the base portion 30. It may have a so-called ball support configuration.

Moreover, although the 1st drive part 200 and the 2nd drive part 300 are inferior in the point of energy usage, if it may be sacrificed, the base part 30 is generated by the electromagnetic force generated by the coil and the magnet. However, it may have a configuration called a so-called voice coil motor that generates a force for moving the holding unit 100. Further, in the above-described embodiment, the first motor 201 that is the first drive source and the second motor 301 that is the second drive source are configured by pulse motors, but these may be DC motors.

In the above-described embodiment, the swinging portion has a configuration that allows the base end portion 81 to swing around the swinging shaft 91 fixed to the base portion 30. Is not limited to this form. Below, the modification of 1st Embodiment is demonstrated with reference to FIGS. 11-13.

In the first modification shown in FIG. 11, the swinging portion 80 a is provided so as to be swingable around a swinging shaft 91 a provided in the holding portion 100. That is, the swing shaft 91a fixed to the holding unit 100 is inserted into the base end portion 81a of the swing portion 80a. And the guide shaft 92a is being fixed to the front-end | tip part 82a of the rocking | swiveling part 80a.

The base portion 30 is provided with an engaging portion 220 that engages with a guide shaft 92a provided at the distal end portion 81a of the swinging portion 80a. The engaging portion 220 engages with the guide shaft 92a while allowing the guide shaft 92a to move in the Z direction with respect to the base portion 30, and according to the swinging of the swinging portion 80a around the swinging shaft 91a, The holding unit 100 is guided to move in the X direction. Even in the first modified example, the same operations and effects as the above-described embodiment can be obtained.

In the second modification shown in FIG. 12, the swinging portion 80 b is provided so as to be swingable around the swinging shaft 91 b provided in the base portion 30. That is, the swing shaft 91b fixed to the base portion 30 is inserted through the base end portion 81b of the swing portion 80b.

In the second modification, the engaging portion 220b is provided at the tip portion 82b of the swinging portion 80b. The guide shaft 92b is fixed to the holding unit 100 in parallel with the swing shaft 91b. The engaging portion 220b engages with the guide shaft 92b so as to allow a change in the distance between the central axes of the guide shaft 92b and the swing shaft 91b, and follows the swing around the swing shaft 91b of the swing portion 80b. Then, the holding unit 100 is guided to move in the X direction. Even in the second modified example, the same operation and effect as the above-described embodiment can be obtained.

The third embodiment shown in FIG. 13 differs from the second modification in that the swinging portion 80c is swingably provided around the swing shaft 91c provided in the holding portion 100. . That is, the swing shaft 91c fixed to the holding unit 100 is inserted through the base end portion 81c of the swing portion 80c.

In the third modification, an engaging portion 220c is provided at the tip 82c of the swinging portion 80c. The guide shaft 92c is fixed to the base portion 30 in parallel with the swing shaft 91c. The engaging portion 220c engages with the guide shaft 92c so as to allow a change in the distance between the central axes of the guide shaft 92c and the swing shaft 91c, and follows the swing of the swing portion 80c around the swing shaft 91c. Then, the holding unit 100 is guided to move in the X direction. Even in the third modified example, the same operations and effects as those of the above-described embodiment can be obtained.

(Second Embodiment)
Below, the 2nd Embodiment of this invention is described with reference to FIGS. 14-24. As shown in FIG. 14, the shake correction apparatus 401 of the present embodiment holds the image sensor 13 so that the light receiving surface 13a is orthogonal to the optical axis O of the imaging lens 3a, and the image sensor 13 is parallel to the light receiving surface 13a. It is configured to be movable within a predetermined movement range along two movement axes that are orthogonal to each other on a plane.

The shake correction apparatus 401 schematically includes a base 402 whose position is fixed with respect to the optical axis O of the imaging lens 3 a, a holding unit 404 that holds the imaging element 13, and a holding unit 404. On the other hand, it is configured to include a support unit that is movably supported on a plane parallel to the light receiving surface 13 a of the image sensor 13, and a drive unit that moves the holding unit 404 relative to the base unit 402. . The driving unit is configured to generate a driving force that causes the holding unit 404 to move relative to the base unit 402 along movement axes that are orthogonal to each other on a plane parallel to the light receiving surface 13a.

In the present embodiment, it is assumed that the light receiving surface 13a of the image sensor 13 is rectangular. In the following description, the direction along the optical axis O, that is, the direction along the axis orthogonal to the light receiving surface 13a of the image sensor 13 is defined as the Z direction, and the direction along the long side of the light receiving surface 13a is defined as the X direction (second direction). The direction along the short side of the light receiving surface 13a is the Y direction (first direction). In the Z direction, when the direction from the light receiving surface 13a of the image sensor 13 toward the imaging lens 3a side is particularly limited, this is referred to as the front, and the opposite is referred to as the rear.

In this embodiment, as an example, the blur correction device 401 is configured integrally with the lens barrel 3 that houses the imaging lens 3a. The lens barrel 3 of the present embodiment is a so-called collapsible lens barrel, and expands and contracts in the direction of the optical axis O by a driving force of a driving device (not shown) provided with an electric motor or the like. Since the configuration of the lens barrel 3 is publicly known, the description thereof will be omitted below, and only the configuration of the blur correction device 401 will be described. Needless to say, the blur correction device 401 may be separated from the lens barrel 3.

The base unit 402 is a member whose relative position is determined with respect to the optical axis O of the imaging lens 3a. In this embodiment, the base unit 402 is fixed inside the housing 10a of the imaging device 10. When the lens barrel 3 and the shake correction apparatus 1 are configured integrally as in the present embodiment, the base unit 402 may constitute a part of the lens barrel 3. .

As shown in FIGS. 15 and 16, the base portion 402 has a cylindrical portion 402 o for accommodating the lens barrel 3. An opening 402q is formed at the rear end of the cylindrical portion 402o. The opening 402q is for exposing the light receiving surface 13a of the imaging device 13 held by the holding unit 404 disposed behind the base unit 402 to the imaging lens 3a side (front of the shake correction device 401). It is.

A notch (through hole) 402p is provided on the side surface of the cylindrical portion 402o. Although not shown in detail, a lens driving motor 420 is disposed on the outer peripheral side of the notch 402p. The lens driving gear 421 rotated by the driving force of the lens driving motor 420 projects to the inside of the cylindrical portion 402o through the notch portion 402p, and is a lens barrel accommodated in the cylindrical portion 402o. 3 is meshed with a gear provided on the outer peripheral portion.

Further, on the outer peripheral portion of the cylindrical portion 402o, a first shaft member 402g and a second shaft member 402j that constitute a support portion, a first motor 405 that constitutes a first drive source, and a second drive source that constitute a second drive source. 2 motors 406 are disposed. In addition, on the rear side of the base portion 402, a first rotating cam member 407 constituting the first driving portion, a second rotating cam member 408 constituting the second driving portion, a first origin detection sensor 411, and a second origin are provided. A detection sensor 412 is provided.

On the other hand, as shown in FIGS. 15 and 18, the holding unit 404 is a flat plate-like member, and holds the image sensor 13 in a substantially central part. In practice, the image sensor 13 is fixed to the holding unit 404 via a circuit board (not shown) or the like.

The outer peripheral portion of the holding portion 404 is provided with three shaft sliding portions 404a, 404b, and 404e as bearings that constitute a support portion. The holding portion 404 is provided with a first cam groove 404g constituting the first driven portion, a second cam groove 404h constituting the second driven portion, a first origin dog 404i, and a second origin dog 404j. It has been.

Hereinafter, a detailed configuration of the support unit that supports the holding unit 404 movably on a plane parallel to the light receiving surface 13a of the imaging element 13 with respect to the base unit 402 will be described.

The support portion includes a first shaft member 402g, a second shaft member 402j, a rotation restricting member 415 and a rotation restricting member 414 provided on the base portion 402, and a shaft sliding portion 404a provided on the holding portion 404. 404b and 404e.

The structural member of the support part provided in the base part 402 side is demonstrated. The first shaft member 402g and the second shaft member 402j are long-axis columnar (straight rod-shaped) members that are parallel to each other and parallel to the light receiving surface 13a of the image sensor 13. Further, it is fixed to the base portion 402. In the present embodiment, the first shaft member 402g and the second shaft member 402j are disposed so as to extend in the Y direction, respectively. That is, the first shaft member 402g and the second shaft member 402j are disposed in parallel with the short side of the light receiving surface 13a. In the present embodiment, the first shaft member 402g and the second shaft member 402j are disposed on both sides in the X direction across the cylindrical portion 402o.

First, details of the first shaft member 402g will be described. The base portion 402 is provided with a pair of protrusions 402c and 402d that protrude to one side in the X direction. The pair of protrusions 402c and 402d are spaced apart from each other in the Y direction. Each of the protrusions 402c and 402d is provided with through holes 402e and 402f formed on the same straight axis parallel to the short side of the light receiving surface 13a. Yes.

The first shaft member 402g is fixed to the base portion 402 by being inserted into the through holes 402e and 402f in a so-called interference fit state. Further, between the pair of protrusions 402c and 402d of the base 402, a flat surface portion 402k that is orthogonal to the light receiving surface 13a and parallel to the short side of the light receiving surface 13a is provided. The flat surface portion 402k is disposed so as to face the first shaft member 402g supported by the pair of protrusions 402c and 402d.

As shown in FIG. 17, the first shaft member 402g is provided with a rotation restricting member (tilt prevention member) 415 that slides along the first shaft member 402g. The rotation restricting member 415 has a substantially rectangular parallelepiped shape, and is provided with a sliding hole 415a that is a linear through hole along the longitudinal direction. The sliding hole 415a has such a dimension that it fits in the cylindrical first shaft member 402g in a slidable state, that is, a so-called precise clearance fit state without significant play.

A plane portion 415b, which is one of the planes parallel to the slide hole 415a of the rotation restricting member 415, is provided on the base portion 402 in a state where the first shaft member 402g is inserted into the slide hole 415a. It is provided so as to face the flat portion 402k while being separated by a predetermined gap. The flat surface portion 415b and the flat surface portion 402k face each other with a predetermined gap therebetween, whereby the rotation of the rotation restricting member 415 around the first shaft member 402g is restricted according to the amount of the predetermined gap. That is, the smaller the predetermined gap is, the smaller the rotatable angle around the first shaft member 402g of the rotation restricting member 415 is.

Also, sliding surfaces 415c and 415d, which are planes spaced apart by a predetermined distance and parallel to each other, are formed at both ends in the sliding direction of the rotation restricting member 415, that is, both ends in the Y direction. The sliding surfaces 415c and 415d are disposed so as to be orthogonal to the sliding hole 415a, that is, orthogonal to the first shaft member 402g.

The separation distance between the sliding surfaces 415c and 415d is shorter than the separation distance between the pair of protrusions 402c and 402d that support the first shaft member 402g. In other words, the length of the rotation restricting member 415 in the Y direction (sliding direction) is shorter than the separation distance between the pair of protrusions 402c and 402d. Therefore, the rotation restricting member 415 slides in the Y direction along the first shaft member 402g within a predetermined range between the pair of protrusions 402c and 402d. The sliding range of the rotation restricting member 415 is set to be larger than the moving range of the holding unit 404 that is moved by a driving unit described later.

Next, the details of the second shaft member 402j will be described. The base portion 402 is provided with a pair of protrusions 402h and 402i that protrude to the other side in the X direction. That is, the pair of protrusions 402h and 402i protrudes in the opposite direction across the optical axis O and the pair of protrusions 402c and 402d that support the first shaft member 402g. The pair of protrusions 402h and 402i are disposed apart from each other by a predetermined distance in the Y direction. Each of the through holes 402l and 402m is formed on the same linear axis parallel to the short side of the light receiving surface 13a. Is provided. The second shaft member 402j is fixed to the base portion 402 in parallel with the first shaft member 402g by being inserted into the through holes 402l and 402m in a so-called interference fit state.

As shown in FIG. 17, the second shaft member 402j is provided with a rotation restricting member (tilt prevention member) 14 that slides along the second shaft member 402j. The rotation restricting member 414 has a substantially U-shape when viewed from the Z direction, and includes a pair of plane portions 414b and 414c facing in parallel. The pair of flat portions 414b and 414c are disposed so as to be separated by a predetermined distance.

In the pair of flat portions 414b and 414c, sliding holes 414a that are through holes are formed on the same straight line perpendicular to the flat portions 414b and 414c. The sliding hole 414a has such a dimension that it fits in the cylindrical second shaft member 402j in a slidable state, that is, in a so-called precise clearance fit state, without significant play.

That is, in a state where the second shaft member 402j is inserted into the sliding hole 414a of the rotation restricting member 414, the pair of flat portions 414b and 414c are orthogonal to the second shaft member 402j. Thereby, the rotation restricting member 414 is restricted from tilting with respect to the second shaft member 402j. Further, the sliding range in the Y direction of the rotation restricting member 414 is set to be larger than the moving range of the holding unit 404 that is moved by a driving unit described later.

The fitting length of the sliding hole 414a with the second shaft member 402j is preferably as long as possible. Further, it is preferable that the pair of flat portions 414b and 414c have a longer distance from each other. Thus, the inclination of the rotation restricting member 414 with respect to the second shaft member 402j is further reduced by increasing the fitting length of the sliding hole 414a or increasing the separation distance between the flat portions 414b and 414c.

Next, constituent members of the support portion provided on the holding portion 404 side will be described. The holding portion 404 is provided with shaft sliding portions 404a, 404b, and 404e that slide in the X direction and the Y direction with respect to the first shaft member 402g and the second shaft member 402j provided on the base portion 402. ing.

The shaft sliding portions 404a and 404b are disposed on one side in the X direction with respect to the imaging element 13 of the holding portion 404. The shaft sliding portions 404a and 404b are arranged separated by a predetermined distance in the Y direction. As shown in FIG. 19, the shaft sliding portions 404a and 404b are configured to include clamping portions 404c and 404d that clamp the first shaft member 402g in the Z direction.

The sandwiching portions 404c and 404d are constituted by a pair of planes parallel to the light receiving surface 13a and facing each other. The pair of planes are separated by a distance that fits in a state where there is no play on the outer periphery of the cylindrical first shaft member 402g and is slidable, so-called precise clearance fit or intermediate fit. Yes.

Thus, by having the structure which clamps the 1st shaft member 402g with a pair of plane parallel to the light-receiving surface 13a, the shaft sliding parts 404a and 404b can move to the Z direction with respect to the 1st shaft member 402g. Slide in the X and Y directions in a restricted state.

Further, in the shaft sliding portions 404a and 404b separated by a predetermined distance in the Y direction, flat portions 404k and 404l are formed on surfaces facing each other. The flat portions 404k and 404l are provided orthogonal to the light receiving surface 13a and parallel to the long side of the light receiving surface 13a. The flat portions 404k and 404l are provided so as to sandwich the rotation restricting member 415 in a clearance fit state or an intermediate fit state. That is, the flat portions 404k and 404l are provided so as to be in sliding contact with the sliding surfaces 415c and 415d provided at both ends of the rotation restricting member 415 in the Y direction.

As described above, the shaft sliding portions 404a and 404b have the configuration in which the rotation restricting member 415 is sandwiched between the pair of plane portions 404k and 404l orthogonal to the light receiving surface 13a and parallel to the long side of the light receiving surface 13a. In a state where the rotation around the axis orthogonal to the light receiving surface 13a is restricted, the first shaft member 402g slides in the X direction and the Y direction.

The shaft sliding portion 404e is disposed on the other side in the X direction with respect to the imaging element 13 of the holding portion 404. As shown in FIG. 19, the shaft sliding portion 404e includes a clamping portion 404f that clamps the second shaft member 402j in the Z direction.

The clamping portion 404f is constituted by a pair of planes parallel to the light receiving surface 13a and facing each other. The pair of flat surfaces are separated from each other by a distance that fits in a slidable state, a so-called clearance fit state or an intermediate fit state, without any play on the outer periphery of the cylindrical second shaft member 402j.

Thus, by having the structure which clamps the 2nd shaft member 402j by a pair of plane parallel to the light-receiving surface 13a, the movement to the Z direction with respect to the 2nd shaft member 402j is controlled by the shaft sliding part 404e. Slide in the X and Y directions.

Further, the shaft sliding portion 404e is in a state of being a clearance fit or in the middle by a pair of plane portions 414b and 414c facing each other in parallel of the substantially U-shaped rotation restricting member 414 that slides along the second shaft member 402j. It is clamped in a fitted state. Since the pair of flat portions 414b and 414c are orthogonal to the second shaft member 402j, the shaft sliding portion 404e is in a state in which the rotation around the axis orthogonal to the light receiving surface 13a is restricted. It slides in the X direction and the Y direction with respect to the member 402j.

In the shake correction apparatus 1 according to the present embodiment, the holding unit 404 rotates about an axis orthogonal to the light receiving surface 13a with respect to the base unit 402 by including the support unit made of the constituent members described above. It is supported so as to be movable in the X direction and the Y direction in a restricted state and in a state where the rotation around an axis parallel to the light receiving surface 13a is restricted. Further, the holding portions 404c, 404d, and 404f allow the holding portion 404 to move in the Y direction while keeping the light receiving surface 13a of the image sensor 13 perpendicular to the optical axis O and allowing the holding portion 404 to move in the Y direction. A guide unit that moves also in the direction is configured.

Next, a detailed configuration of the driving unit that generates a driving force for moving the holding unit 404 relative to the base unit 402 in the X direction and the Y direction on a plane parallel to the light receiving surface 13a will be described. .

The driving unit includes a first motor 405, a second motor 406, a first rotating cam member 407, a second rotating cam member 408 provided in the base unit 402, and a first cam groove provided in the holding unit 404. 404g and the second cam groove 404h.

The first motor 405 and the second motor 406 are electric motors that generate a driving force for rotating a rotation shaft (spindle). The first motor 405 and the second motor 406 have a configuration called a stepping motor, for example.

The first motor 405 and the second motor 406 are arranged so that the rotation axis is parallel to the optical axis O, that is, the rotation axis is orthogonal to a surface parallel to the light receiving surface 13 a of the image sensor 13. ing. Pinion gears 405a and 406a are fixed to the rear side ends of the rotation shafts of the first motor 405 and the second motor 406, respectively. In addition, seat surface portions 405b and 406b and through holes 405c and 406c formed in the seat surface portions 405b and 406b are provided at rear end portions of the main body portions of the first motor 405 and the second motor 406, respectively. ing.

The first motor 405 and the second motor 406 are fixed to the base portion 402 by screws 405d and 406d that pass through the through holes 405c and 406c and are screwed into screw holes 402n provided in the base portion 402. Further, the base portion 402 is provided with gear openings 402 a and 402 b that are through holes. When the first motor 405 and the second motor 406 are fixed to the base portion 402, the gear openings are provided. Pinion gears 405a and 406a protrude to the rear side of the base portion 402b through 402a and 402b.

The pinion gears 405a and 406a mesh with the driven gears 407c and 408c of the first rotating cam member 407 and the second rotating cam member 408 disposed on the rear side of the base portion 402b, respectively.

The first rotating cam member 407 and the second rotating cam member 408 are members that rotate around a pair of rotating shafts 402r that are erected on the rear side of the base portion 402, as shown in FIG. The rotation shaft 402r is a columnar member provided so as to be orthogonal to a surface parallel to the light receiving surface 13a, and the rotation shaft 402r is slid on the first rotation cam member 407 and the second rotation cam member 408. Sliding holes 407b and 408b that are movably inserted are provided. That is, the first rotating cam member 407 and the second rotating cam member 408 are disposed so as to be rotatable around an axis orthogonal to a plane parallel to the light receiving surface 13a.

The first rotation cam member 407 and the second rotation cam member 408 are respectively driven gears 407c and 408c, and rotation cam portions 407a (first rotation cam portions) and 408a (second rotation) provided behind the driven gears 407c and 408c. Cam portion). The number of teeth of the driven gears 407c and 408c is larger than the number of teeth of the pinion gears 405a and 406a with which they are engaged. The first rotating cam member 407 and the second rotating cam member 408 are moved by the first motor 405 and the second motor 406 around the axis orthogonal to the plane parallel to the light receiving surface 13a. Rotation driving is performed in a state of being decelerated from the rotational speed of the rotation shaft 406.

A pressing plate 409 is disposed behind the first rotating cam member 407 and the second rotating cam member 408. The holding plate 409 is a member for holding the first rotating cam member 407 and the second rotating cam member 408 so as not to fall off the rotating shaft 402r. The holding plate 409 is fixed to the base portion 402 with screws 409d.

Rotating cam portions 407a and 408a protrude rearward from the pressing plate 409 through cam openings 409a and 409b provided on the pressing plate 409. The rotating cam portions 407a and 408a engage with a first cam groove 404g and a second cam groove 404h provided in the holding portion 404.

Hereinafter, the detailed shapes of the rotating cam portions 407a and 408a and the first cam groove 404g and the second cam groove 404h engaged therewith will be described.

In the present embodiment, the rotating cam portions 407a and 408a have the same shape, and the first cam groove 404g and the second cam groove 404h also have the same shape. The combination of the rotating cam portion 407a and the first cam groove 404g and the combination of the rotating cam portion 408a and the second cam groove 404h differ only in the direction in which they are arranged. Accordingly, only the rotating cam portion 407a and the first cam groove 404g will be described with respect to the shape.

As shown in FIG. 21, the rotating cam portion 407a is rotatable around a rotation axis C orthogonal to a plane parallel to the light receiving surface 13a, and has a curved surface whose outer diameter changes in the circumferential direction. It is a cam. The rotating cam portion 407a has a plane-symmetric shape with respect to a predetermined plane P including the rotation axis C (the central axis of the sliding hole 407b). That is, the cam cross section in FIG. 21 is axially symmetric (even function) with respect to a specific axis (P in FIG. 21). Hereinafter, one curved surface across the symmetry plane P of the rotating cam portion 407a is referred to as a first cam surface 407d, and the other curved surface is referred to as a second cam surface 407e.

Here, as shown in FIG. 22, in a cross-sectional shape of a plane perpendicular to the rotation axis C of the rotation cam portion 407a, an angle around the rotation axis C is θ, and from the rotation axis C to the surface of the rotation cam portion 407a. Let R be the distance. FIG. 23 shows a relationship between the angle θ of the rotating cam portion 407a and the distance R, a so-called cam diagram. In FIG. 23, θ = 0 [°] and θ = ± 180 [°] are on the symmetry plane of the rotating cam portion 407a. The range in which the angle θ is a positive value represents the shape of the first cam surface 407d, and the range in which the angle θ is a negative value represents the shape of the second cam surface 407e.

23, the rotating cam portion 407a is configured such that the radial dimension R from the rotation axis C changes linearly with respect to the angle θ. In this embodiment, as an example, when the value of the distance R at θ = ± 180 [°] is b and the value of the distance R at θ = 0 [°] is a, a: b = 1 : The relationship of 3 is satisfied.

On the other hand, the first cam groove 404g is a through hole or a recess provided in the holding portion 404, and as shown in FIG. 24, the first cam groove 404g is formed on the first cam surface 407d and the second cam surface 407e constituting the rotating cam portion 407a. The first abutment surface 404m and the second abutment surface 404n are in contact with each other.

The first abutment surface 404m and the second abutment surface 404n are planes parallel to each other, and are separated by a distance that sandwiches the rotating cam portion 407a as small as possible in a so-called clearance fit state. As described above, the first cam surface 407d and the second cam surface 407e are in an axially symmetric relationship with respect to the axis P passing through the rotation axis in the cam cross section, and each has a radial dimension R linearly with respect to the angle θ. Since the shape changes, the widths of the first cam groove 404g and the second cam groove 404h can be made constant.

As indicated by a two-dot chain line in FIG. 24, when the rotating cam portion 407a rotates around the rotation axis C, the first cam groove 404g is orthogonal to the first contact surface 404m and the second contact surface 404n. It moves in the direction (arrow A direction in FIG. 24). Further, the first cam groove 404g is affected by the rotation angle of the rotating cam portion 407a in a direction parallel to the first contact surface 404m and the second contact surface 404n (the direction of arrow B in FIG. 24). And is relatively movable with respect to the rotating cam portion 407a.

Next, the arrangement of the rotating cam portions 407a and 408a, the first cam groove 404g and the second cam groove 404h will be described. FIG. 18 shows a neutral state in which the holding unit 404 is located at the center of the movable range in the X direction and the Y direction. In the present embodiment, in this neutral state, the value of the rotation angle θ of the rotating cam portions 407a and 408a is near zero.

As shown in FIG. 18, in the first cam groove 404g, the first contact surface 404m and the second contact surface 404n are orthogonal to the surface parallel to the light receiving surface 13a and parallel to the short side of the light receiving surface 13a. It is arranged to become. In other words, the first cam groove 404g is disposed such that the first contact surface 404m and the second contact surface 404n sandwich the rotating cam portion 407a in the X direction. In the neutral state, the rotating cam portion 407a is disposed such that the symmetry plane P is substantially parallel to the first contact surface 404m and the second contact surface 404n. In other words, in the neutral state, the rotating cam portion 407a is disposed so that the first cam surface 407d and the second cam surface 407e constituting the rotating cam portion 407a are located on one side and the other side in the X direction, respectively. Yes.

On the other hand, the second cam groove 404h is arranged such that the first contact surface 404m and the second contact surface 404n are orthogonal to the surface parallel to the light receiving surface 13a and parallel to the long side of the light receiving surface 13a. Has been. In other words, the second cam groove 404h is arranged such that the first contact surface 404m and the second contact surface 404n sandwich the rotating cam portion 408a in the Y direction, and the first cam groove 404g On the other hand, it is arranged in a state of being rotated 90 degrees around an axis orthogonal to the light receiving surface 13a. That is, when viewed from the Z direction, the first cam groove 404g and the second cam groove 404h are disposed so as to be orthogonal to each other. In the neutral state, the rotating cam portion 408a is disposed so that the symmetry plane P is substantially parallel to the first contact surface 404m and the second contact surface 404n. That is, in the neutral state, the rotating cam portion 408a is disposed so that the first cam surface 407d and the second cam surface 407e constituting the rotating cam portion 408a are located on one side and the other side in the Y direction, respectively. Yes.

Therefore, when the rotating cam portion 407a of the first rotating cam member 407 is rotated, a force in the X direction is applied to the first cam groove 404g. Here, the rotating cam portion 408a of the second rotating cam member 408 and the second cam groove 404h having a sufficient length in the groove longitudinal direction can be freely moved relative to each other in the X direction. The engagement between the portion 408a and the second cam groove 404h does not hinder the movement of the holding portion 404 in the X direction. Therefore, when the rotating cam portion 407a of the first rotating cam member 407 is rotated by the driving force of the first motor 405, the holding portion 404 moves in the X direction.

Similarly, when the rotating cam portion 408a of the second rotating cam member 408 rotates, a force in the Y direction is applied to the second cam groove 404h. Here, the rotating cam portion 407a of the first rotating cam member 407 and the first cam groove 404g having a sufficient length in the groove longitudinal direction can be freely moved relative to each other in the Y direction. The engagement between the portion 407a and the first cam groove 404g does not hinder the movement of the holding portion 404 in the Y direction. Therefore, when the rotating cam portion 408a of the second rotating cam member 408 is rotated by the driving force of the second motor 406, the holding portion 404 moves in the Y direction. Therefore, the first cam groove 404g and the second cam groove 404h can allow the holding portion 404 to move in the Y direction and the X direction, respectively.

In the present embodiment, the holding unit 404 is provided with a first origin dog 404i and a second origin dog 404j. The base unit 402 is provided with a first origin detection sensor 411 and a second origin detection sensor 412 made of a photo interrupter for detecting the first origin dog 404i and the second origin dog 404j. The detection result of the first origin dog 404i by the first origin detection sensor 411 is used for the origin finding operation of the first motor 405. Further, the detection result of the second origin dog 404j by the second origin detection sensor 412 is used for the origin finding operation of the second motor 406.

As described above, in the shake correction apparatus 1 of the present embodiment, the holding unit 404 that holds the image sensor 13 is moved in two directions orthogonal to each other on a plane parallel to the light receiving surface 13a of the image sensor 13. it can.

In the present embodiment as described above, there is no need for a complicated configuration in which the image sensor is held by two moving frames as in the case of the conventional shake correction device, and the image sensor is only required by a single moving frame (holding unit 404). 13 can be moved in the X direction and the Y direction, and the number of parts can be reduced as compared with the prior art.

Moreover, in this embodiment, since the image pick-up element 13 is moved by a single moving frame (holding unit 404), the inertial mass of the moving object is made smaller than the conventional structure in which the image pick-up element is moved by two moving frames. Thus, the response to movement control of the image sensor (followability to electrical control) is improved. That is, the driving force required to move the image sensor 13 can be made smaller than before, and the apparatus can be reduced in size and power can be saved.

As described above, according to the present embodiment, the shake correction apparatus that moves the image sensor on a plane parallel to the light receiving surface, and can be downsized with a simpler structure than the conventional one. Can be provided.

In the present embodiment, the first cam surface 407d and the second cam surface 407e constituting the rotating cam portions 407a and 408a have a radial dimension R from the rotation axis C that changes linearly with respect to the angle R. . For this reason, the relationship between the rotation angle of the rotating cam portions 407a and 408a and the amount of movement of the holding portion 404 in the X direction and the Y direction is linear, and the position control of the holding portion 404 is facilitated.

In the present embodiment, the rotating cam portions 407a and 408a are sandwiched between the first contact surface 404m and the second contact surface 404n, which are a pair of flat surfaces, and thus a mechanism that eliminates backlash using an elastic member. Do not need. Conventionally, an elastic member provided to eliminate backlash sometimes resonates and adversely affects position control. However, this embodiment can solve such a problem.

In the present embodiment, the rotating cam portions 407a and 408a, the first cam groove 404g, and the second cam groove 404h are in line contact with each other, but they may be in point contact with each other. For example, in the present embodiment, the outer peripheral shape in the cross section including the rotation axis of the rotating cam portions 407a and 408a is linear, that is, the outer peripheral surfaces of the rotating cam portions 407a and 408a are cylindrical peripheral surfaces (secondary curved surfaces). Is formed. On the other hand, the outer peripheral shape in the cross section including the rotation shaft of the rotating cam portions 407a and 408a may be a sawtooth shape or a semicircular shape. Further, the cross-sectional shapes of the first contact surface 404m and the second contact surface 404n of the first cam groove 404g and the second cam groove 404h may be sawtooth or semicircular.

As described above, if the rotary cam portions 407a and 408a are in point contact with the first cam groove 404g and the second cam groove 404h, the sliding resistance can be reduced, and the rotary cam portion 407a at the time of assembly. 408a and the allowable range of inclination between the first cam groove 404g and the second cam groove 404h.

Hereinafter, a modified example of the above-described second embodiment will be described with reference to FIGS. The blur correction device of this modification is different from the second embodiment described above in the shapes of the rotating cam portions 407a and 408a and the shapes of the first cam groove 404g and the second cam groove 404h. Hereinafter, only differences from the second embodiment will be described, and the same components as those of the second embodiment are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

In the present embodiment, the rotating cam portions 407a and 408a have the same shape, and the first cam groove 404g and the second cam groove 404h also have the same shape. Therefore, only the shapes of the rotating cam portion 407a and the first cam groove 404g will be described.

In the second embodiment, the first cam surface 407d and the second cam surface 407e constituting the rotating cam portion 407a are disposed at the same position in the axial direction. For this reason, in the second embodiment, the first cam surface 407d and the second cam surface 407e can be formed only in the range of 180 degrees in the circumferential direction. Therefore, the actual use range of the first cam surface 407d and the second cam surface 407e, that is, the rotation range of the first cam surface 407d and the second cam surface 407e is less than 180 °.

In this modification, as shown in FIGS. 25 and 27, by providing the first cam surface 407d and the second cam surface 407e at different positions in the axial direction, the first cam surface 407d is in a range of 180 degrees or more in the circumferential direction. And the 2nd cam surface 407e is formed. In this modification, as shown in FIG. 26, the first cam surface 407d and the second cam surface 407e are each formed in a range of 200 degrees in the circumferential direction.

Further, the first abutting surface 404m and the second abutting surface 404n of the first cam groove 404g that abuts on the first cam surface 407d and the second cam surface 407e, respectively, in accordance with the shape of the rotating cam 7a are also rotated. They are provided at different positions in the axial direction of the cam 7a.

As in the present modification, the first cam surface 407d and the second cam surface 407e are formed in a range of 180 degrees or more in the circumferential direction, so that the component members are not enlarged and compared with the second embodiment. Thus, the movement range of the holding unit 404 can be widened.

In the shake correction apparatus 401 according to the second embodiment and the modified example of the second embodiment, the rotation amount of the rotation shafts of the electric motors 405 and 406 serving as drive sources, the X direction of the holding unit 404, and The relationship with the amount of movement in the Y direction is a linear relationship. That is, the movement amount of the holding unit 404 in the X direction and the Y direction is linearly proportional to the rotation amount of the rotation shafts of the electric motors 405 and 406. For this reason, position control of the holding unit 404 in the shake correction apparatus 401, that is, position control of the image sensor 13 is easy.

Note that the pair of cam surfaces in the rotating cam portion may be relatively shifted in phase with respect to the rotation center of the rotating cam portion. And the width | variety of a cam groove can be changed by shifting this phase shift as needed.

The present invention described above is not limited to the above-described embodiment, and can be appropriately changed without departing from the scope or spirit of the invention that can be read from the claims and the entire specification. Is also included in the technical scope of the present invention.

For example, the second embodiment described with reference to FIGS. 14 to 27 and the modification of the second embodiment can be combined with the first embodiment described with reference to FIGS. It is. That is, in the second embodiment, the configuration of the support portion can be replaced with the configuration of the support portion of the first embodiment or a modification of the first embodiment. In the first embodiment, the configuration of the drive unit can be replaced with the configuration of the drive unit of the second embodiment or a modification of the second embodiment.

In the above-described embodiment, the image blur is corrected by moving the image sensor. However, blur is caused by moving an optical element such as a lens or a prism in the photographing optical system or in the observation optical system. It goes without saying that the present invention can also be applied to a shake correction apparatus for correcting.

In addition, the present invention is not limited to the digital camera described in the above-described embodiment, but may be a recording device having a photographing function, a mobile phone, a PDA, a personal computer, a game machine, a digital media player, a television, a GPS, a clock, etc. It can also be applied to electronic devices.

This application is based on Japanese Patent Application No. 2009-121224 filed in Japan on May 19, 2009 and Japanese Patent Application No. 2009-260244 filed on November 13, 2009 in Japan. The application is filed and the above disclosure is cited in the present specification, claims and drawings.

Claims (16)

1. A blur correction apparatus that corrects image shake by moving an image sensor in a first direction and a second direction on a plane parallel to a light receiving surface of the image sensor includes the following:
   Base,
   A single holding unit for holding the image sensor;
   A support unit that supports the holding unit so as to be movable in a direction along the plane with respect to the base unit;
   A first driving source for generating a driving force for moving the holding portion relative to the base portion in the first direction;
   A second driving source for generating a driving force for moving the holding portion relative to the base portion in the second direction;
   A first cover that moves the holding portion relative to the first direction in response to the driving force generated by the first driving source while allowing the holding portion to move in the second direction. Drive part,
   While allowing the holding portion to move in the first direction, a second target to receive the driving force generated by the second drive source and move the holding portion relatively in the second direction. Drive part,
   A guide unit that moves the holding unit in the second direction while allowing the holding unit to move in the first direction.
2. The blur correction device according to claim 1 comprises:
   A oscillating portion having a base end portion oscillating around an oscillating shaft parallel to the first direction provided on the base portion and including a guide shaft at the distal end portion parallel to the oscillating shaft;
   An engaging portion that is provided in the holding portion and is slidable along the guide shaft and engages with the guide shaft so that a distance between the guide shaft and the holding portion can be changed.
3. The blur correction device according to claim 2,
   The oscillating portion is arranged such that the oscillating shaft and the guide shaft overlap in a direction along an axis orthogonal to the plane.
4. The blur correction device according to claim 3,
   The engaging portion sandwiches the guide shaft by a pair of planes orthogonal to the plane and parallel to the first direction.
5. The blur correction device according to claim 1 comprises:
   A oscillating portion having a base end portion oscillating around an oscillating shaft parallel to the first direction provided on the holding portion, the distal end portion including a guide shaft parallel to the oscillating shaft;
   An engaging portion that is provided on the base portion, is slidable along the guide shaft, and engages with the guide shaft so that a distance between the guide shaft and the base portion can be changed.
6. The shake correction apparatus according to claim 5,
   The oscillating portion is arranged such that the oscillating shaft and the guide shaft overlap in a direction along an axis orthogonal to the plane.
7. The blur correction device according to claim 6,
   The engaging portion sandwiches the guide shaft by a pair of planes orthogonal to the plane and parallel to the first direction.
8. The blur correction device according to claim 1 comprises:
   A oscillating portion having a base end portion swingable about a swinging axis parallel to the first direction provided on the base portion;
   Provided at the tip of the oscillating portion and slidable along a guide axis parallel to the first direction provided on the holding portion, and the distance between the guide shaft and the oscillating shaft is An engaging portion that engages with the guide shaft so as to be changeable.
9. The shake correction apparatus according to claim 8, wherein
   The swing shaft and the guide shaft are disposed so as to overlap in a direction along an axis orthogonal to the plane.
10. The shake correction apparatus according to claim 9, wherein
    The engaging portion sandwiches the guide shaft by a pair of planes parallel to a plane including the swing shaft and the guide shaft.
11. The blur correction device according to claim 1 comprises:
    An oscillating portion having a base end portion that is provided on the holding portion and is capable of oscillating about an oscillating axis parallel to the first direction;
    A distance between the guide shaft and the swing shaft is provided at a tip portion of the swing portion and is slidable along a guide shaft parallel to the first direction provided in the base portion. An engaging portion that engages with the guide shaft so that the angle can be changed.
12. The blur correction device according to claim 11,
    The swing shaft and the guide shaft are disposed so as to overlap in a direction along an axis orthogonal to the plane.
13. The shake correction apparatus according to claim 12,
    The engaging portion sandwiches the guide shaft by a pair of planes parallel to a plane including the swing shaft and the guide shaft.
14. The blur correction device according to claim 1 comprises:
    A first driving unit including a first rotating cam unit that rotates about an axis orthogonal to a plane parallel to the light receiving surface by a driving force of the first driving source;
    A second driving unit including a second rotating cam unit that rotates about an axis orthogonal to a plane parallel to the light receiving surface by a driving force of the second driving source;
    The first driven portion is provided in the holding portion along the first direction, engages with the first rotating cam portion, and moves the holding portion with the rotation of the first rotating cam portion. Including a first cam groove that moves in the second direction;
    The second driven portion is provided in the holding portion along the second direction, engages with the second rotating cam portion, and moves the holding portion with the rotation of the second rotating cam portion. A second cam groove that moves in the first direction is included.
15. The shake correction apparatus according to claim 14,
    The first rotating cam portion has a shape in which the relationship between the amount of rotation and the amount of movement of the holding portion in the second direction is linear,
    The second rotating cam portion has a shape in which a relationship between a rotation amount and a movement amount of the holding portion in the first direction is linear.
16. The shake correction apparatus according to claim 15, wherein
    Each of the first rotating cam portion and the second rotating cam portion is configured by a pair of first cam surfaces and second cam surfaces, each having a plane that includes a rotation axis as a symmetry plane.
    The first cam groove and the second cam groove are respectively a first contact surface that contacts the first cam surface, and a second contact that is parallel to the first contact surface and contacts the second cam surface. And an abutting surface.

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