JP5188722B2 - Image stabilization apparatus and camera - Google Patents

Description

  The present invention relates to an image shake correction apparatus and a camera, and more particularly to an image shake correction apparatus that drives a correction lens to perform image shake correction and a camera including the image shake correction apparatus.

In recent years, digital cameras that use an image sensor such as a charge coupled device (CCD) or a complementary metal-oxide semiconductor (CMOS) sensor to convert an optical image into an electrical signal and digitize and record the electrical signal have become widespread. . In such a digital camera, there is a demand not only for increasing the number of pixels of a CCD or CMOS sensor, but also for a lens barrel that forms an optical image on those image sensors. Specifically, there is a demand for a lens barrel equipped with a zoom lens system with higher magnification.
On the other hand, in the field of digital cameras, there is a demand for miniaturization of the main body in order to improve portability. For this reason, downsizing of an image pickup apparatus including a lens barrel and an image pickup element, which is considered to greatly contribute to downsizing of the main body, is demanded. In order to reduce the size of such an imaging apparatus, a so-called bending optical system has been proposed in which a zoom lens system is bent in the middle of an optical path to reduce the size of the apparatus without changing the optical path length.

For example, Patent Document 1 discloses a bending optical system that bends an optical path using a reflecting mirror. Specifically, the lens barrel disclosed in Patent Document 1 includes a first lens group and a second lens group in order from the subject side on the subject side of the reflecting mirror, and the reflecting mirror on the imaging element side of the reflecting mirror. A third lens group and a fourth lens group are provided in this order from the side. The first lens group is fixed. The second lens group and the third lens group are movable in the optical axis direction, and constitute a zoom lens system in cooperation with each other. The fourth lens group is a lens for focus adjustment.
Patent Document 2 discloses a bending optical system that bends an optical path using a prism. Specifically, the lens barrel disclosed in Patent Document 2 includes a lens group on the subject side of the prism. The lens group is movable in the optical axis direction between the use position and the storage position. Further, the prism is movable so as to secure the storage space when the lens group is in the storage position.

Patent Document 3 discloses the configuration of a lens group used in a bending optical system.
However, further improvement is required in order to satisfy both the demands for realizing a zoom lens system with a high magnification and realizing miniaturization.
Specifically, with the configurations disclosed in Patent Document 1 and Patent Document 2, it is difficult to configure a zoom lens system with high magnification while realizing downsizing of the apparatus. Furthermore, even if the lens configuration disclosed in Patent Document 3 is adopted, there is a problem that the configuration for realizing downsizing of the device is not disclosed, and the specific configuration of the device is unknown.
On the other hand, in general, when an imaging apparatus is downsized or provided with a high-magnification zoom lens system, it is possible to prevent a shake of a captured image (image shake) mainly due to camera shake or the like. Desired.

FIG. 20 is an exploded perspective view of a conventional image blur correction apparatus (see Patent Document 4). In the image shake correction apparatus shown in FIG. 20, the second lens group 101 is held by a lens frame 102, and the lens frame 102 is movably supported by a guide shaft 103 that guides movement in the pitching direction and yawing direction. ing. The lens frame 102 is provided with coils 104a and 104b for driving the lens frame 102 in the pitching direction and the yawing direction. The fixed base 105 is provided with magnets 106a and 106b facing the respective coils 104a and 104b. By energizing the coils 104a and 104b, a driving force is generated in each direction, and the second lens group 101 is driven in the pitching direction and the yawing direction. The shake amount of the lens barrel is detected by the angular velocity sensors 107a and 107b, and the coils 104a and 104b are energized in accordance with the detection signals to perform image shake correction.
JP 11-258678 A JP 2003-169236 A Japanese Patent Laid-Open No. 2004-102809 JP 2000-75338 A (FIG. 4) Japanese Patent Laid-Open No. 7-5514 (FIGS. 6 and 8)

There is a demand for downsizing of an imaging apparatus even in an imaging apparatus equipped with an image shake correction apparatus. In order to meet this requirement, an attempt has been made to reduce the size of light incident on the image shake correction apparatus in the optical axis direction in the conventional image shake correction apparatus mounted on the image pickup apparatus.
On the other hand, mounting an image blur correction device in various imaging devices has been required. In this case, in order to increase the degree of freedom in designing the imaging device, not only the size of the image shake correction device in the optical axis direction but also the size in any direction orthogonal to the optical axis is required. ing. For example, when the above-described image shake correction apparatus is mounted on an imaging apparatus having a bending optical system, if a conventional image shake correction apparatus is mounted on the light exit side of a reflecting mirror or prism, the light incident on the image shake correction apparatus The size of the imaging device in the direction perpendicular to the optical axis increases. That is, the size of the imaging device (thickness of the imaging device) in the optical axis direction of the light incident on the reflecting mirror or prism increases. This is because in the conventional image blur correction apparatus, the two drive units that drive the correction lens for image blur correction in the pitching direction and the yawing direction are disposed at positions 90 degrees apart from each other with the correction lens as the center. is there.

Further, as described above, in the conventional image blur correction apparatus, the guide shaft 103 is provided so that the pitching movement frame and the yawing movement frame can go straight in the pitching direction and the yawing direction. For this reason, an installation space for the guide shaft 103 is required, which hinders downsizing of the image blur correction apparatus.
In addition to an image pickup apparatus having such a bending optical system, an image shake correction apparatus in which the size in any direction orthogonal to the optical axis is reduced is mounted, and the image pickup apparatus is reduced in any direction. Realizing the above becomes a factor to increase the appeal of the imaging device to customers.
Therefore, in order to realize further downsizing of the image blur correction device, an image blur correction device that rotationally drives the correction lens around a rotation axis arranged substantially parallel to the optical axis of the correction lens has been proposed (for example, , See cited document 5). FIG. 21 and FIG. 22 are exploded perspective views of an image blur correction apparatus as a conventional technique.

The image shake correction apparatus shown in FIG. 21 mainly includes a support frame 15 to which the correction lens 16 is fixed, a support arm 13 that holds the support frame 15 so as to be linearly movable, and a lens barrel 11 that holds the support arm 13 rotatably. And is composed of. In this image blur correction apparatus, the permanent arm 45 attached to the support arm 13 and the coil 46a attached to the lens barrel 11 cause the support arm 13 to follow the arc along the axis 45a with respect to the lens barrel 11. Is driven to rotate. The support frame 15 is driven in the direction perpendicular to the optical axis with respect to the support arm 13 by the permanent magnets 47 a and 47 b attached to the support frame 15 and the coil 49 attached to the support arm 13. With these configurations, the correction lens 16 can move in the pitching direction and the yawing direction within a plane orthogonal to the optical axis.
22 mainly includes a support frame 15 to which the correction lens 16 is fixed, a support arm 13 that holds the support frame 15 rotatably, and a mirror that holds the support arm 13 so that the support arm 13 can move straight. And a cylinder 11. In this image blur correction apparatus, the support arm 13 is driven in a direction perpendicular to the optical axis with respect to the lens barrel 11 by a coil 62 y attached to the support arm 13 and a permanent magnet 63 y attached to the lens barrel 11. The support frame 15 is driven in a direction perpendicular to the optical axis with respect to the support arm 13 by the coil 62p attached to the support frame 15 and the permanent magnet 63p attached to the support arm 13. With these configurations, the correction lens 16 can move in the pitching direction and the yawing direction within a plane orthogonal to the optical axis.

In the image blur correction apparatus shown in FIGS. 21 and 22, one support frame is driven in a direction along an arc centered on the rotation axis. For this reason, the frictional force at the time of driving the support frame is reduced, and the drive unit having the coil and the permanent magnet can be downsized. In addition, when compared with the image blur correction apparatuses described in Patent Documents 1 to 4, one straight guide shaft is omitted. For this reason, the guide mechanism can be miniaturized. That is, the image blur correction apparatus shown in FIGS. 21 and 22 can be further downsized.
However, in the image blur correction apparatus shown in FIGS. 21 and 22, there is a concern that the image blur correction performance is degraded. Specifically, in the image shake correction apparatus shown in FIG. 21, the driving force for rotating the correction lens 16 acts on the support arm 13 but does not act directly on the support frame 15 to which the correction lens 16 is fixed. In the image blur correction apparatus shown in FIG. 22, the driving force for moving the correction lens 16 straight acts on the support arm 13 but does not directly act on the support frame 15 to which the correction lens 16 is fixed. For this reason, the lens holding member may not be held at a desired position depending on the dimensional accuracy of the portion where the support arm 13 and the support frame 15 are connected. As a result, the positional accuracy of the correction lens may be reduced.

As described above, when downsizing is realized, the image blur correction performance may be deteriorated.
Further, in the image blur correction apparatuses described in Patent Documents 1 to 4, for example, the guide shaft is fixed by adhesion. For this reason, it is necessary to apply and dry the adhesive in the manufacturing process of the image blur correction apparatus. As a result, the manufacturing operation becomes complicated and the manufacturing cost increases.
An object of the present invention is to provide an image blur correction apparatus that can be downsized while preventing a decrease in image blur correction performance, and a camera including the same.
Another object of the present invention is to provide a method of manufacturing an image blur correction apparatus that can reduce the manufacturing cost.

  An image shake correction apparatus according to a first aspect of the invention is an apparatus for correcting image shake caused by camera movement, and includes a lens holding member, a first holding member, a second holding member, and a straight advance. A drive unit for rotation and a drive unit for rotation. The lens holding member is fixed with a correction lens included in the optical system in order to perform image blur correction. The first holding member has a straight direction that is an arbitrary direction in a plane orthogonal to the optical axis of the light incident on the correction lens, and a rotation direction along an arc centering on a rotation axis that is substantially parallel to the optical axis in the plane. The lens holding member is movably held in one of the two. A 2nd holding member hold | maintains a 1st holding member so that a movement is possible to the other among a straight advance and a rotation direction. The straight drive unit applies a driving force to the lens holding member in order to drive the lens holding member in the straight direction. The rotation driving unit applies a driving force to the lens holding member in order to drive the lens holding member in the rotation direction.

In this image shake correction apparatus, the first holding member rotates about the rotation axis with respect to the second holding member, or the lens holding member rotates about the rotation axis with respect to the first holding member. For this reason, a guide shaft corresponding to the rotation direction is not required. As a result, in this image blur correction device, it is possible to reduce the size in the direction perpendicular to the straight traveling direction.
In addition, in this image shake correction apparatus, a driving force is directly applied from the linear drive and rotation drive units to the lens holding member to which the correction lens is fixed. For this reason, compared with the case where the driving force of both drive parts does not act directly on the lens holding member, it is possible to prevent the position accuracy of the correction lens from being lowered and to prevent the image blur correction performance from being lowered.
As described above, this image blur correction apparatus can be miniaturized while preventing a decrease in image blur correction performance.

An image blur correction apparatus according to a second aspect of the present invention is the apparatus according to the first aspect of the present invention, further comprising a rotation position detection element for detecting the position of the lens holding member in the rotation direction. The rotation drive unit has a rotation magnet. The magnetic flux density distribution in the rotating direction of the rotating magnet includes a usable area for rotation in which the magnetic flux density changes at a substantially constant rate. When viewed from the direction along the optical axis, there is a state in which the detection center of the rotation position detection element coincides with the center line of the rotation usable region in the rotation direction in the movable region of the lens holding member.
As a result, the movable range of the detection center of the position detection element is likely to be within the usable area of the magnet, and a decrease in position detection accuracy in the rotational direction can be prevented.
An image shake correction apparatus according to a third aspect of the present invention is the apparatus according to the second aspect of the present invention, wherein when viewed from the direction along the optical axis, the detection center of the rotation position detection element is the rotation usable area in the rotation direction. The center line direction of the usable area for rotation in the rotation direction substantially coincides with the straight direction.

In this case, when the lens holding member is driven in the straight direction, the positional deviation between the detection center of the rotation position detection element and the center line of the rotation usable area in the rotation direction is suppressed. As a result, the movable range of the detection center of the position detection element is easily contained within the usable area of the magnet. As a result, it is possible to prevent a decrease in position detection accuracy in the rotational direction accompanying an operation in the straight traveling direction.
Here, in the case where “the center line of the usable area for rotation in the rotation direction substantially coincides with the straight direction”, in addition to the case where the center line completely coincides with the straight direction, the detection center of the position detection element This includes the case where the center line and the straight direction are deviated while the movable range is within the usable area of the magnet.
An image shake correction apparatus according to a fourth invention is the apparatus according to the second or third invention, wherein the optical axis of the light incident on the correction lens is the center of the correction lens when viewed from the direction along the optical axis. , The detection center of the rotation position detection element substantially coincides with the center line of the rotation usable area in the rotation direction.

In this case, the movable range of the detection center of the position detection element is easily within the usable area of the magnet in a state where the optical axis of the light incident on the correction lens coincides with the center of the correction lens. For this reason, it is possible to perform image blur correction within a range in which the position detection accuracy in the rotation direction is high, and it is possible to prevent a decrease in image blur correction performance.
Here, in the case where “the detection center of the rotation position detection element substantially coincides with the center line of the rotation usable area in the rotation direction”, in addition to the case where the detection center and the center line completely coincide, This includes a case where the detection center and the center line are deviated while the movable range of the detection center of the detection element is within the usable area of the magnet.
An image shake correction apparatus according to a fifth aspect of the present invention is the apparatus according to any one of the second to fourth aspects of the present invention, when viewed from the direction along the optical axis, the rotation axis, the center of the correction lens, and the rotation. The detection center of the position detection element for use is arranged on a substantially straight line.

In this case, when the lens holding member is driven in the straight direction, the positional deviation between the detection center of the rotation position detection element and the center line of the rotation usable area in the rotation direction is suppressed. As a result, the movable range of the detection center of the position detection element is easily contained within the usable area of the magnet. Thereby, the fall of the position detection precision of a rotation direction can be prevented.
Here, “the rotation axis, the center of the correction lens, and the detection center of the position detection element for rotation are arranged in a substantially straight line” means that the rotation axis, the optical axis center, and the detection center are arranged in a straight line. In addition to the case where the rotation center, the optical axis center, and the detection center are deviated in a state where the movable range of the detection center of the position detection element is within the usable area of the magnet.
An image shake correction apparatus according to a sixth aspect of the present invention is the apparatus according to any one of the first to fifth aspects of the present invention, further comprising a rectilinear position detection element that detects the position of the lens holding member in the rectilinear direction. When viewed from the direction along the optical axis, the line segment connecting the rotation axis and the detection center of the position detection element for straight travel substantially coincides with the straight travel direction.

In this case, the movable range of the detection center of the position detection element is easily within the usable area of the magnet in a state where the optical axis of the light incident on the correction lens coincides with the center of the correction lens. For this reason, it is possible to perform image blur correction within a range where the position detection accuracy in the straight traveling direction is high, and it is possible to prevent a decrease in position detection accuracy.
Here, in the case where “the line segment connecting the rotation axis and the detection center of the position sensor for rectilinear movement substantially coincides with the rectilinear direction”, in addition to the case where the line segment and the rectilinear direction completely coincide, This includes the case where the line segment and the straight direction are deviated in a state where the movable range of the detection center of the detection element is within the usable area of the magnet.
An image shake correction apparatus according to a seventh aspect of the present invention is the apparatus according to any one of the first to fifth aspects, further comprising a rectilinear position detection element for detecting the position of the lens holding member in the rectilinear direction. The rectilinear drive section has a rectilinear magnet. The magnetic flux density distribution in the straight traveling direction of the straight traveling magnet includes a usable region for straight traveling in which the magnetic flux density changes at a substantially constant rate. When viewed from the direction along the optical axis, there is a state in which the detection center of the rectilinear position detecting element coincides with the center line of the rectilinear usable area in the rectilinear direction in the movable region of the lens holding member.

As a result, the movable range of the detection center of the position detection element is likely to be within the usable area of the magnet, and a decrease in position detection accuracy in the straight direction can be prevented.
An image blur correction apparatus according to an eighth invention is the apparatus according to the seventh invention, wherein the optical axis of the light incident on the correction lens coincides with the center of the correction lens when viewed from the direction along the optical axis. In this state, the detection center of the position detection element for straight travel substantially coincides with the center line of the usable region for straight travel in the straight travel direction.
In this case, when the lens holding member is driven in the rotation direction, the positional deviation between the detection center of the rectilinear position detecting element and the center line of the rectilinear usable area in the rectilinear direction is suppressed. As a result, the movable range of the detection center of the position detection element is likely to be within the usable area of the magnet. Thereby, it is possible to prevent a decrease in position detection accuracy in the straight traveling direction.

Here, in the case where “the detection center of the position detection element for rectilinear movement substantially coincides with the center line of the usable area for rectilinear movement in the rectilinear direction”, in addition to the case where the detection center and the center line completely coincide, This includes a case where the detection center and the center line are deviated while the movable range of the detection center of the detection element is within the usable area of the magnet.
An image shake correction apparatus according to a ninth aspect of the invention is the apparatus according to any one of the first to eighth aspects of the invention, wherein the rotation drive unit is disposed so as to face the rotation magnet and the rotation magnet. And a coil. When viewed from the direction along the optical axis, the distance between the rotation axis and the center of the rotating coil is longer than the distance between the rotation axis and the center of the correction lens.
In general, the correction lens is heavier than the lens holding member and the first holding member. For this reason, the position of the center of gravity of the movable part of the image blur correction device is near the center of the correction lens.

The center of the rotation coil can be regarded as the load generation point of the rotation drive unit. Here, the distance between the rotation axis and the load generation point of the rotation drive unit is longer than the distance between the rotation axis and the center of the correction lens. For this reason, it becomes possible to drive the lens holding member with a small driving force, and it is possible to reduce the size and power consumption of the rotation drive unit.
An image shake correction apparatus according to a tenth aspect of the present invention is the apparatus according to any one of the first to eighth aspects of the present invention, wherein the rotation drive unit is disposed so as to face the rotation magnet and the rotation magnet. And a coil. When viewed from the direction along the optical axis, the distance between the rotation axis and the detection center of the rotation position detection element is shorter than the distance between the rotation axis and the center of the rotation coil.
In this case, the movable range of the rotation position detection element in the rotation direction is reduced. As a result, the movable range of the detection center of the rotation position detection element is likely to be within the usable area of the magnet. Thereby, the fall of the position detection precision of a rotation direction can be prevented.

An image shake correction apparatus according to an eleventh aspect of the invention is the apparatus according to any one of the first to tenth aspects of the invention, wherein a rotation axis is arranged in a region between the straight drive unit and the correction lens.
The portion of the lens holding member where the correction lens is fixed needs to be strong enough to hold the correction lens. For this reason, a part of the lens holding member always exists around the correction lens.
On the other hand, when the rotation shaft is arranged on the side opposite to the correction lens of the straight drive unit, the outer dimensions of the apparatus are increased from the straight drive unit only by a portion that forms the rotation shaft.
Here, a rotation axis is arranged in a region between the straight drive unit and the correction lens. For this reason, the space around the correction lens can be used effectively, and the size of the apparatus can be reduced.

An image blur correction apparatus according to a twelfth aspect of the present invention is the apparatus according to any one of the first to eleventh aspects of the present invention, further comprising a rectilinear position detection element for detecting the position of the lens holding member in the rectilinear direction. The rectilinear drive unit includes a rectilinear magnet and a rectilinear coil disposed to face the rectilinear magnet. The distance between the rotating shaft and the detection center of the position detecting element for rectilinear movement is shorter than the distance between the rotating shaft and the center of the rectilinear coil.
In this case, the movable range in the rotational direction of the position detection element for straight travel is reduced. As a result, the movable range of the detection center of the position detection element for straight travel tends to be within the usable area of the magnet. Thereby, position detection accuracy in the straight direction can be ensured.
An image shake correction apparatus according to a thirteenth aspect of the present invention is the apparatus according to any one of the first to twelfth aspects of the present invention, wherein the image blur correction apparatus is electrically connected to the rotation drive unit in order to supply a voltage to the rotation drive unit. A flexible printed circuit board is further provided. The flexible printed circuit board includes: a first fixing portion fixed to the lens holding member; a second fixing portion fixed to the second holding member; and a flexible portion connecting the first and second fixing portions to bendable. ,have. The flexible portion is disposed on the rotation axis side of the correction lens.

In this case, the amount of deformation of the flexible portion when the lens holding member moves in the rotational direction is reduced, and disconnection of the flexible printed circuit board can be prevented. Further, when the deformation amount of the flexible portion is reduced, the driving force for driving the lens holding member in the rotation direction is reduced. As a result, power consumption can be reduced in this image blur correction apparatus.
According to a fourteenth aspect of the present invention, in the image shake correction apparatus according to any one of the first to thirteenth aspects, a correction lens is disposed in a region between the rotation drive unit and the straight drive unit.
In this case, when viewed from the direction along the optical axis, the rotation and straight drive units are arranged on both sides of the correction lens. For this reason, the image blur correction apparatus becomes long in one direction. In other words, the dimension in the direction perpendicular to the direction in which the device becomes longer can be shortened.
An image blur correction apparatus according to a fifteenth aspect of the present invention is the apparatus according to any one of the first to fourteenth aspects of the present invention, further comprising at least three support portions. The support portion is one of the lens holding member and the first holding member, and the rotating member that is held so as to be movable in the rotation direction is one of the first and second holding members, The rotation holding member holding the rotation member is movably held in a plane orthogonal to the optical axis, and is restricted from moving to both sides in the direction along the optical axis.

Thereby, it is possible to prevent the lens holding member from moving in the optical axis direction when the lens holding member is driven, and it is possible to prevent a decrease in optical performance such as a defocus of the subject image.
According to a sixteenth aspect of the present invention, in the image blur correction apparatus according to the fifteenth aspect of the present invention, each of at least three support portions is formed on the rotation support member and the first support portion formed on the rotation member. And a second support portion that can be fitted to the support portion from a direction orthogonal to the rotation axis. One of the first and second support portions is a rod-shaped body. The other of the first and second support portions is a substantially U-shaped body that is fitted into the rod-shaped body.
In this case, it is possible to restrict the rotation member from moving in the direction along the optical axis with respect to the rotation holding member with a simple configuration.
A camera according to a seventeenth invention includes a first lens group, a bending optical system, a second lens group, an image shake correction apparatus according to any one of the first to sixteenth inventions, an imaging unit, A lens barrel and a casing are provided. The first lens group captures light along the first optical axis. The bending optical system bends light incident along the first optical axis in a direction along the second optical axis that intersects the first optical axis. The second lens group includes a correction lens that performs image blur correction, and captures light bent by the bending optical system. The imaging unit receives light that has passed through the second lens group. The lens barrel includes a first lens group, a bending optical system, a second lens group, an image blur correction device, and an imaging unit. The casing holds the lens barrel.

Here, “along the first optical axis” means, for example, being parallel to the first optical axis. Further, “along the second optical axis” means, for example, being parallel to the second optical axis. The bending optical system includes, for example, a member having a reflecting surface, and more specifically, may include a prism, a mirror, and the like. The imaging unit may be, for example, a CCD or CMOS that receives light electrically, but is not limited thereto, and may be a film or the like.
Since this camera includes the image blur correction device according to any one of the first to sixteenth inventions, the camera can be reduced in size while preventing a decrease in image blur correction performance. That is, with this camera, it is possible to acquire a high-quality image with image blur corrected.
A camera according to an eighteenth aspect of the invention is the camera according to the seventeenth aspect of the invention, wherein the straight direction is substantially parallel to the direction orthogonal to the first and second optical axes.

In this case, it is possible to reduce the size of the camera in the direction along the first optical axis. In particular, this camera employs a bending optical system, and is equipped with an image blur correction device whose size in a direction orthogonal to the straight direction is reduced. This makes it possible to reduce the size of the camera (camera thickness) in the direction along the first optical axis.
According to a nineteenth aspect of the present invention, there is provided a lens holding mechanism that holds a correction lens included in an optical system for performing image blur correction, and a surface that is orthogonal to the optical axis of light incident on the correction lens. And a rotation holding member that is held so as to be movable in a rotation direction along an arc centered on a rotation axis substantially parallel to the optical axis. The manufacturing method includes a step of moving a lens holding mechanism side member in a direction perpendicular to the rotation axis with respect to the rotation holding member, and a shaft for rotatably connecting the lens holding mechanism side member and the rotation holding member. Attaching the member to the lens holding mechanism side member and the rotation holding member.

In this manufacturing method, the image blur correction device can be easily assembled as compared with the case where the member corresponding to the support portion is attached after the shaft member is attached. Thereby, the manufacturing cost can be reduced.
Here, the “lens holding mechanism” means at least one member holding the correction lens. Therefore, examples of the “lens holding mechanism” include a mechanism that holds the correction lens so that the correction lens can move straight, or a single member to which the correction lens is fixed.
A manufacturing method according to a twentieth invention is the manufacturing method according to the nineteenth invention, wherein when the shaft member is attached, the first hole provided in the member on the lens holding mechanism side and the second provided in the rotation holding member. A shaft member is press-fitted into one of the holes.
In this case, there is no need to bond and fix like a conventional guide shaft. Thereby, an adhesion process can be shortened and reduction of manufacturing cost can be aimed at.

In addition, the explanation of the term used above is as follows.
The “detection center of the position detection element” is a virtual point that can be considered that the position detection element is arranged at one point at the time of position detection. Examples of the detection center include a point where the detection sensitivity is maximum in the position detection element. In general, the detection center can be assumed to be the center point of the detection surface of the position detection element.
The “usable area” is, for example, a performance guarantee range in which the magnetic flux density changes at a substantially constant rate around the polarization line between the N pole and the S pole when the magnet is magnetized in two poles. Means. Therefore, the “center line of the usable area” means, for example, a boundary line where the polarity changes between the N pole and the S pole when the magnet is magnetized in two poles. The state of the magnet includes not only the case where the N pole part and the S pole part are physically integrated, but also the case where the N pole part and the S pole part are physically separated. It is.

“The center of the coil” means the center obtained from the outer shape of the coil. For example, when the coil is substantially rectangular, it means the center of the rectangle.
In addition, as a position detection element, the magnetic sensor (Hall element) etc. which utilized the Hall effect are mentioned, for example.

According to the present invention, it is possible to provide an image blur correction apparatus that can be reduced in size while preventing a decrease in image blur correction performance, and a camera including the same.
According to the present invention, it is possible to provide a method for manufacturing an image blur correction apparatus capable of reducing the manufacturing cost.

<1: Overview>
A first embodiment of the present invention will be described with reference to FIGS.
The digital camera of the present invention has a main feature in the configuration of the image blur correction apparatus. The digital camera according to the present embodiment employs a bending optical system as an optical system, and is formed so that a subject-side lens barrel can be extended in multiple stages. As a result, both the realization of a zoom lens system with a high magnification and the miniaturization of the apparatus are achieved. Note that the camera equipped with the image shake correction apparatus according to the present invention is not limited to this. The image shake correction apparatus according to the present invention can be mounted on a camera that does not have a bending optical system.
<2: Digital camera>
A digital camera according to a first embodiment of the present invention will be described with reference to FIGS.

[2.1: Configuration of digital camera]
FIG. 1 is a perspective view showing an appearance of a digital camera 1 according to the first embodiment of the present invention.
The digital camera 1 includes an imaging device 2 and a main body 3. The imaging apparatus 2 has a bending optical system that guides the incident light beam along the first optical axis A1 to the imaging element by bending the light beam in the direction along the second optical axis A2 orthogonal to the first optical axis A1. I have. The main body 3 houses the imaging device 2 and controls the imaging device 2 and the like.
First, before describing the detailed configuration of the imaging device 2, the configuration of the main body 3 will be described.
In the following description, the six surfaces of the digital camera 1 are defined as follows.
The surface facing the subject side when taking a picture with the digital camera 1 is the front surface, and the opposite surface is the back surface. Up and down vertical direction of the subject and rectangular image captured by the digital camera 1 (generally, aspect ratio (ratio of long side to short side) is 3: 2, 4: 3, 16: 9, etc.) When photographing is performed so as to coincide with each other, a surface facing upward in the vertical direction is defined as a top surface, and a surface on the opposite side is defined as a bottom surface. Further, when shooting is performed so that the vertical direction of the subject and the vertical direction of the rectangular image captured by the digital camera 1 coincide with each other, the left side when viewed from the subject side is the left side, and vice versa. The side surface is the right side surface. The above definition does not limit the usage posture of the digital camera 1.

According to the above definition, FIG. 1 is a perspective view showing a front surface, a top surface, and a left side surface.
Note that not only the six surfaces of the digital camera 1 but also the six surfaces of each component arranged in the digital camera 1 are defined in the same manner. That is, the above definition is applied to the six surfaces of each constituent member arranged in the digital camera 1.
Also, as shown in FIG. 1, a three-dimensional orthogonal coordinate system (right-handed system) having a Y axis parallel to the first optical axis A1 and an X axis parallel to the second optical axis A2 is defined. According to this definition, the direction from the back side to the front side along the first optical axis A1 is the Y-axis positive direction, and the direction from the right side to the left side along the second optical axis A2. Is the X-axis positive direction, and the direction from the bottom surface side to the top surface side along the orthogonal axis orthogonal to the first optical axis A1 and the second optical axis A2 is the Z-axis positive direction.

Hereinafter, in each drawing, it demonstrates on the basis of this XYZ coordinate system. That is, the X-axis positive direction, the Y-axis positive direction, and the Z-axis positive direction in each drawing indicate the same direction.
[2.2: Configuration of main body]
The configuration of the main body 3 will be described with reference to FIGS. 1, 2, and 3 (a) to 3 (c).
FIG. 2 is a perspective view showing the appearance of the back, top, and right side of the digital camera 1.
3A to 3C are perspective views schematically showing the configuration of the main body 3. FIG. 3A is a perspective view showing a configuration of a member arranged on the Y axis direction positive side (front side), and FIG. 3B is arranged on the Z axis direction negative side (bottom side). FIG. 3C is a perspective view showing a configuration of a member, and FIG. 3C is a perspective view showing a configuration of a member arranged on the Y axis direction negative side (back side).

As shown in FIG. 1 to FIG. 3, the main body 3 includes an exterior part 11 and a grip part 12 that form a casing that houses the imaging device 2, a strobe 15 and a release button 16 that are disposed on the surface of the exterior part 11. From the operation dial 17 and the image display unit 18, the main capacitor 20, the sub substrate 21, the battery 22, the main substrate 23, and the memory card 24 arranged inside the casing composed of the exterior unit 11 and the grip unit 12. It is mainly composed.
As shown in FIG. 1, the exterior portion 11 is a substantially rectangular parallelepiped housing that is long in the second optical axis A2 direction, and on the positive side in the X-axis direction, a grip portion 12 for a photographer to hold at the time of photographing. Is arranged so as to protrude from the exterior portion 11 in the Y-axis direction. Thereby, the exterior part 11 and the grip part 12 comprise the substantially L-shaped hollow housing | casing. A fixed frame 52 (see FIG. 6) of the imaging device 2 to be described later projects a part of the cylindrical portion 125 (see FIG. 6) to the Y axis direction positive side from the exterior portion 11. Further, a strobe 15 is disposed on the front surface of the exterior portion 11. The strobe 15 flashes as necessary to illuminate the subject and assists exposure when the subject is dark. A release button 16 and an operation dial 17 are arranged on the grip 12 side on the upper surface of the exterior portion 11. The release button 16 is pressed toward the negative side in the Z-axis direction when performing a shooting operation. The operation dial 17 performs various settings such as a shooting operation setting.

Further, as shown in FIG. 2, an image display unit 18 is provided on the back surface of the exterior unit 11 as a visual recognition unit that allows a photographer or the like to visually recognize an image captured by the imaging device 2. The image display unit 18 has, for example, a rectangular outer shape with an aspect ratio (ratio of long side to short side) of 3: 2, 4: 3, 16: 9, and the long side direction is the second side. It is provided so as to be substantially parallel to the direction along the optical axis A2 (X-axis direction).
1 and 2 show only main members arranged on the surface of the exterior portion 11, and members other than the members described may be provided.
Next, the internal configuration of the main body 3 will be described with reference to FIG.
As shown in FIG. 3A, on the positive side in the Y-axis direction inside the main body 3, the imaging device 2 that is long in the second optical axis A2 direction (X-axis direction positive side) has its longitudinal direction in the exterior portion. 11 are arranged along the longitudinal direction. The imaging device 2 is disposed in the main body 3 with the first group frame unit 41 that holds the first lens group G1 facing the subject set to the negative side in the X-axis direction. Thereby, the X-axis direction distance from the first lens group G1 to the grip portion 12 is ensured.

Further, a strobe 15, a main capacitor 20, and a sub board 21 are disposed on the positive side in the Z-axis direction of the imaging device 2. The main capacitor 20 gives flash energy to the strobe 15 by charging from a battery 22 described later. The sub board 21 transforms electric power from a battery 22 described later as needed, and controls the strobe 15. Further, a battery 22 as a power source for operating the digital camera 1 is disposed on the positive side in the Y-axis direction inside the grip portion 12.
Further, as shown in FIGS. 3B and 3C, the main substrate 23 is disposed on the Y axis direction negative side of the imaging device 2. On the main board 23, an image processing circuit for processing an image signal from the imaging device 2, a control circuit for controlling the imaging device 2, and the like are mounted. A memory card 24 is disposed on the negative side of the battery 22 in the Y-axis direction. The memory card 24 records the image signal from the imaging device 2.

As shown in FIGS. 3A and 3B, the imaging device 2 is formed such that the Z-axis direction width (Wz) is larger than the Y-axis direction width (Wy).
<3: About imaging device>
[3.1: Configuration of Imaging Device]
The configuration of the imaging device 2 mounted on the digital camera 1 will be described with reference to FIG.
FIG. 4 is an assembled perspective view of the imaging apparatus 2. 4A is a perspective view illustrating the front surface, the top surface, and the left side surface of the imaging device 2, and FIG. 4B is a perspective view illustrating the front surface, the top surface, and the right side surface of the imaging device 2.
The imaging device 2 includes a lens barrel 31 having an optical system 35, a motor unit 32 having a zoom motor 36 that drives the lens barrel 31, and a CCD 37 as an imaging unit that receives a light beam that has passed through the lens barrel 31. And a CCD unit 33 having the same.

The lens barrel 31 is characterized in that it has a multistage retractable lens frame that can be extended and retracted in multiple stages in the direction of the first optical axis A1, and optically bent. It is characterized in that it has an optical system 35 constituting the optical system. The optical system 35 includes five groups of twelve optical elements (lenses and prisms) that realize a high-power zoom (for example, an optical zoom of about 6 to 12 times) exceeding the optical three-times zoom. With such a configuration, the lens barrel 31 takes in the light beam incident along the first optical axis A1, and intersects the first light axis A1 with the light beam incident along the first optical axis A1. The light beam bent in the direction along the second optical axis A2 and further bent in the direction along the second optical axis A2 is guided to the CCD 37.
The motor unit 32 includes, for example, a zoom motor 36 such as a DC motor, a flexible printed circuit board (FPC) (not shown) that electrically connects the zoom motor 36 to the main board 23 (see FIG. 3), and the zoom motor 36. This is mainly composed of a photosensor (not shown) provided for measuring the position of the lens barrel 31 from the origin of the lens through the measurement of the motor rotation number. The zoom motor 36 drives the lens barrel 31 and moves the optical system 35 between the wide-angle end and the telephoto end. Thereby, the optical system 35 provided in the lens barrel 31 operates as a zoom lens system that changes the imaging magnification of the light beam in the CCD 37. The photosensor operates as follows. The photosensors are a pair of transmissive photosensors that are provided to enter from the outside of the motor box (gearbox). The photosensor has a U-shaped outer shape, and a pair of light-emitting elements and light-receiving elements are provided at opposite ends. A gear directly connected to the zoom motor 36 passes between the light emitting element and the light receiving element, and by measuring the number of times the gear blocks between the light emitting element and the light receiving element per unit time. The rotation speed of the zoom motor can be measured without contact.

The CCD unit 33 receives the light beam that has passed through the lens barrel 31, converts it into an electrical signal, a CCD sheet metal 38 for fixing the CCD 37 to the lens barrel 31, and the CCD 37 as the main substrate 23 (FIG. 3) and an FPC (not shown) that is electrically connected.
[3.2: Optical system]
Before describing the detailed configuration of the imaging apparatus 2, the configuration of the optical system 35 provided in the lens barrel 31 will be described with reference to FIG.
FIG. 5 shows the configuration of the optical system 35 provided in the lens barrel 31. FIG. 5 shows the arrangement of the optical system 35 when the optical system 35 is located at the wide-angle end. FIG. 5 shows the arrangement of the optical system 35 viewed from the same viewpoint as FIG.

As shown in FIG. 5, the optical system 35 includes, in order from the subject side, a first lens group G1, a second lens group G2, an exposure adjustment member St (see FIG. 6), a third lens group G3 as a correction lens, and a first lens group G3. 4 lens group G4, 5th lens group G5, and IR filter F1 (not shown) are comprised, The light beam which injects from the 1st lens group G1 passes each lens group G1-G5 and IR filter F1, It is configured to be guided to the CCD 37. The lens groups G1 to G5 constitute a zoom lens system by changing the interval between the lens groups.
In addition, the structure of the lens which comprises each lens group G1-G5 is not restricted to the above-mentioned thing, If it is a structure which has the same optical effect, it is also possible to employ | adopt another lens structure.
<4: Lens barrel>
[4.1: Configuration of lens barrel]
The configuration of the imaging device 2, mainly the configuration of the lens barrel 31, will be described with reference to FIG.

FIG. 6 is an exploded perspective view of the imaging apparatus 2 viewed from the same viewpoint as FIG.
The lens barrel 31 includes a first group frame unit 41 that holds the first lens group G1, a base unit 43 to which a second group frame unit 42 that holds the second lens group G2 is fixed, an exposure adjustment member St, and a first lens group G1. A third group frame unit 44 that holds the third lens group G3, a fourth group frame unit 45 that holds the fourth lens group G4, and a master flange unit 46 that holds the fifth lens group G5.
The first group frame unit 41 includes a first lens group G1 disposed on the first optical axis A1, a first group frame 50 that holds the first lens group G1, and the first group frame 50 as the first optical axis A1. Drive frame 51 movably supported in the direction (Y-axis direction), fixed frame 52 movably supporting the drive frame 51 in the first optical axis A1 direction (Y-axis direction), fixed frame 52 and base unit 43, and a drive gear 53 that is rotatably disposed along the Y-axis direction and transmits the driving force of the motor unit 32 to the drive frame 51.

The fixed frame 52 is fixed to the second group frame unit 42 that holds the second lens group G2. At the time of fixing, positioning in the Z-axis direction and the X-axis direction is performed so that the optical axis of the first lens group G1 and the optical axis of the fourth lens L4 of the second lens group G2 coincide.
The base unit 43 includes a base 55 that forms a housing of the lens barrel 31, a cover 56 that forms a housing together with the base 55, covers the front side of the base 55, and a second group frame unit 42 that is fixed to the base 55. A third group moving mechanism 57 for moving the third group frame unit 44 housed in the housing constituted by the base 55 and the cover 56 along the second optical axis A2 direction (X-axis direction), and 3 It is mainly composed of a photosensor 58 that detects the position of the group frame unit 44 in the X-axis direction.
A motor unit 32 that rotationally drives the drive gear 53 is attached to the negative side of the base unit 43 in the X-axis direction. The driving force of the motor unit 32 is transmitted to the third group moving mechanism 57 via the driving gear 53. A master flange unit 46 that covers the X axis direction positive side of the base unit 43 is fixed to the X axis direction positive side of the base unit 43.

The third group frame unit 44 is provided on the second optical axis A2, and includes a shutter unit 60 including an exposure adjustment member St that performs a shutter operation and a diaphragm operation, a third lens group G3, and a third lens group G3. An image shake correction device 400 that is held so as to be movable in the axial direction and the Z-axis direction, and a third group frame 462 that supports the shutter unit 60 and the image shake correction device 400 are mainly configured.
The third group frame 462 is fixed to the third group moving mechanism 57 of the base unit 43 and is driven in the X-axis direction. At the time of fixing, the optical axis when the third lens group G3 is located at the movable center of the movable range and the optical axes of the sixth lens L6 and the seventh lens L7 of the second lens group G2 coincide with each other. Positioning in the axial direction and the Z-axis direction is performed. Further, the third group frame 462 is slidably fitted to third group guide poles 70 and 71 extending from the master flange unit 46 to be described later to the X axis direction negative side. As a result, the third group frame unit 44 can move only in the X-axis direction, that is, in the second optical axis A2 direction.

The fourth group frame unit 45 mainly includes a fourth lens group G4, a fourth group frame 66 that holds the fourth lens group G4, and a sensor magnet 67 and a coil 68 that are fixed to the fourth group frame 66. .
The fourth group frame 66 is slidably fitted to fourth group guide poles 72 and 73 extending on the negative side in the X-axis direction from a master flange unit 46 described later. As a result, the fourth group frame 66 is moved in the Y-axis direction and the Z-axis direction so that the optical axes of the fourth lens group G4 and the optical axes of the sixth lens L6 and the seventh lens L7 of the second lens group G2 coincide. It is positioned and can move only in the X-axis direction, that is, in the second optical axis A2 direction.
The master flange unit 46 includes a fifth lens group G5, a master flange 75 that holds the fifth lens group G5, a third group guide poles 70, 71, and a fourth group that are fixed to the master flange 75 and extend to the X axis direction negative side. Guide poles 72 and 73, an IR filter F1 attached from the X axis direction positive side via cushion rubber 80, a magnetic member 76 for generating a drive in the fourth group frame unit 45 in cooperation with the coil 68, and a sensor The MR sensor 77 mainly detects the magnetism of the magnet 67 and senses the position of the fourth group frame unit 45 in the X direction.

The master flange 75 is fixed on the X axis direction positive side of the base 55. At the time of fixing, the optical axis of the fifth lens group G5 and the optical axes of the sixth lens L6 and the seventh lens L7 of the second lens group G2 are aligned in the Y-axis direction and the Z-axis direction. Further, the CCD unit 33 is fixed on the X axis direction positive side of the master flange unit 46.
[4.2: Image blur correction apparatus]
(4.2.1: Overall configuration of image blur correction apparatus)
First, the overall configuration of the image blur correction apparatus 400 will be described with reference to FIGS. 7 is a perspective view of the image blur correcting device 400, FIG. 8 is an exploded perspective view of the image blur correcting device 400, FIG. 9 is a perspective view of the pitching moving frame 405 and the electric board 406, and FIG. 10 is a yawing moving frame 408 and three groups. 11 is a perspective view of the frame 462, FIG. 11 is a perspective view of the yawing moving frame 408, and FIG. 12 is a schematic cross-sectional view of the periphery of the yawing guide mechanism 480 on a plane that includes the rotation axis A3 and is orthogonal to the Z axis.

As shown in FIGS. 7 and 8, the image shake correction apparatus 400 includes a pitching movement frame 405 as a part of a lens holding member that holds the third lens group G3, and a lens holding member fixed to the pitching movement frame 405. The electric board 406 as a part of the motor, the yawing movement frame 408 as a first holding member that supports the pitching movement frame 405 so as to be movable in the pitching direction (Z-axis direction), and the yawing movement frame 408 can be moved in the yawing direction. The third group frame 462 as a second holding member to be supported on, the linearly moving electromagnetic actuator 412 as a linearly driving unit, and the rotating electromagnetic actuator 414 as a rotationally driving unit.
The pitching moving frame 405 and the yawing moving frame 408 are connected via a pitching guide mechanism 470 that performs guidance in the pitching direction. The yawing movement frame 408 and the third group frame 462 are connected via a yawing guide mechanism 480 that performs guidance in the yawing direction along an arc centered on the rotation axis A3. Details of the yawing guide mechanism 480 will be described later.

Here, the pitching direction means the Z-axis direction (straight direction), and the yawing direction means the direction (rotation direction) along the arc centered on the rotation axis A3.
The pitching guide mechanism 470 mainly includes a bearing 405a and a detent 405b formed on the pitching moving frame 405, a fixed portion 408a, a protruding portion 408b, and a shaft 408c formed on the yawing moving frame 408. Both ends of a pitching shaft 405d that is slidably inserted into the bearing 405a are fixed to the fixing portion 408a by adhesion. A shaft 408c that is slidably fitted into the rotation stopper 405b is fixed to the protruding portion 408b.
As shown in FIGS. 8 and 9, the linear electromagnetic actuator 412 is driven in the Z-axis direction on the pitching moving frame 405 (more specifically, the electric board 406) so that the third lens group G3 moves in the pitching direction. Giving power directly. Specifically, the rectilinear electromagnetic actuator 412 is disposed on the negative side in the Z-axis direction of the third lens group G3, and is mainly fixed to the yoke 462d fixed to the third group frame 462 and the yoke 462d. The linear movement magnet 462c and the linear movement coil 406a formed on the electric substrate 406 are configured. The magnet 462c is two-pole magnetized in the Z-axis direction. The rectilinear electromagnetic actuator 412 generates an electromagnetic force Fp in the pitching direction.

On the positive side in the Y-axis direction of the coil 406a, a Hall element 406c is disposed as a linear position detection element for detecting the magnetic flux of the magnet 462c and detecting the Z-axis direction position of the third lens group G3. The hall element 406c shares the magnet 462c with the linear electromagnetic actuator 412.
The rotating electromagnetic actuator 414 directly applies a driving force in the Y-axis direction to the pitching moving frame 405 (more specifically, the electric board 406) so that the third lens group G3 rotates about the rotation axis A3. Specifically, the rotating electromagnetic actuator 414 is disposed on the positive side in the Z-axis direction of the third lens group G3, and is mainly fixed to the yoke 462f fixed to the third group frame 462 and the yoke 462f. The rotating magnet 462e and the rotating coil 406b formed on the electric substrate 406 are configured. The magnet 462e is two-pole magnetized in the Y-axis direction. The rotating electromagnetic actuator 414 generates an electromagnetic force Fy in the yawing direction.

On the negative side in the Z-axis direction of the coil 406b, a Hall element 406d is disposed as a rotation position detection element for detecting the magnetic flux of the magnet 462e and detecting the Y-axis direction position of the third lens group G3. The hall element 406d shares the magnet 462e with the electromagnetic actuator 414 for rotation.
The rotating electromagnetic actuator 414 is disposed on the opposite side of the third lens group G3 from the rectilinear electromagnetic actuator 412. In other words, the third lens group G3 is disposed in a region between the electromagnetic actuator 414 and the electromagnetic actuator 412. Details of the planar arrangement of each component will be described later.
As shown in FIGS. 7 to 9, the image blur correction apparatus 400 further includes a flexible printed board 490 for supplying a voltage to the electric board 406. The flexible printed board 490 is electrically connected to the electric board 406. Specifically, the flexible printed circuit board 490 is fixed to the back side of the electric board 406 and is electrically connected to the electric board 406, and extends from the first fixing part 491 to the Z axis direction negative side. The flexible portion 492 includes a flexible portion 492 and a second fixing portion 493 that is formed at the end of the flexible portion 492 and is fixed to the third group frame 462.

As shown in FIGS. 7 and 8, the flexible portion 492 is disposed on the rotation axis A3 side of the third lens group G3 (see FIG. 8). More specifically, the flexible portion 492 is disposed on the Y axis direction positive side and the Z axis direction negative side of the third lens group G3. The flexible portion 492 extends in the Z-axis direction from the portion on the positive side in the Y-axis direction of the electric substrate 406, and the flexible portion 492 is bent in the Y-axis direction outside the coil 406a.
When the pitching moving frame 405 moves in the pitching direction and the yawing direction with respect to the third group frame 462, the first fixing portion 491 and the second fixing portion 493 move relative to each other. At this time, the flexible portion 492 bends between the first fixing portion 491 and the second fixing portion 493 in the Z-axis direction and the Y-axis direction, and the relative movement of the first fixing portion 491 and the second fixing portion 493 is absorbed. The
(4.2.2: About the yawing guide mechanism 480)
This image shake correction apparatus 400 is characterized by the configuration of the yawing guide mechanism 480. Specifically, as shown in FIG. 8, the yawing movement frame 408 and the third group frame 462 are rotatable about a rotation axis A3 disposed outside the third lens group G3 via a yawing guide mechanism 480. It is connected. More specifically, as shown in FIGS. 8, 10, and 11, the yawing guide mechanism 480 includes a first bearing 481 (see FIGS. 8, 11, and 12) formed on the yawing movement frame 408, and 3 It mainly includes a second bearing 482 (see FIGS. 10 and 12) formed on the group frame 462 and a pin 430 extending in the X-axis direction.

The first bearing 481 is formed on the negative side in the Z-axis direction of the yawing movement frame 408, and has a hole 481a penetrating in the X-axis direction (see FIG. 12). The second bearing 482 is formed on the positive side in the Z-axis direction of the opening 462p formed around the second optical axis A2 of the third group frame 462, and has a hole 482a penetrating in the X-axis direction. .
As shown in FIG. 12, the portion on the positive side in the X-axis direction of the pin 430 is, for example, press-fitted into the hole 482 a of the second bearing 482. That is, the pin 430 is fixed to the third group frame 462 via the second bearing 482. The portion on the negative side in the X-axis direction of the pin 430 is inserted into the hole 481a of the first bearing 481 through a minute gap. The center of the pin 430 substantially coincides with the rotation axis A3.
With the above configuration, the yawing movement frame 408 and the third group frame 462 are coupled so as to be rotatable about the rotation axis A3.

The yawing movement frame 408 and the third group frame 462 are supported by the yawing guide mechanism 480 so as to be movable in a plane orthogonal to the second optical axis A2, and the relative movement in the second optical axis A2 direction is performed. It is regulated. Three restricting portions (supporting portions) are provided in a plane orthogonal to the X axis. Specifically, as shown in FIGS. 10 and 11, the yawing guide mechanism 480 includes three first support portions 483, 484, 485 (see FIGS. 10, 11) provided on the yawing movement frame 408, 3 It further has three second support portions 486, 487, and 488 (see FIG. 10) provided on the group frame 462.
As shown in FIGS. 10 and 11, the first support portions 483, 484, and 485 are disposed around the third lens group G3. The first support portions 483 and 484 are substantially U-shaped portions, and the first support portion 485 has a rod-like body. As shown in FIG. 10, the second support portions 486, 487, and 488 are disposed at positions corresponding to the first support portions 483, 484, and 485. The second support portions 486 and 487 have rod-shaped bodies, and the second support portion 488 is a substantially U-shaped portion. The first support portion 483 is slidably fitted into the second support portion 486, the first support portion 484 is slidably fitted into the second support portion 487, and the first support portion 485 is fitted into the second support portion 488. It is slidably fitted.

Details of each part will be described below.
As shown in FIGS. 10 and 11, the first support portion 483 has a substantially U shape that is open on the positive side in the Z-axis direction, and is formed on the outer peripheral portion of the yawing movement frame 408. A second support portion 486 is disposed at a position corresponding to the first support portion 483 of the third group frame 462. The second support part 486 includes a pair of protrusions 486a and a shaft 486b fixed between the pair of protrusions 486a. The shaft 486b is, for example, a rod-like body extending in the Y-axis direction, and is inserted into the substantially U-shaped first support portion 483 from the Z-axis direction.
A minute gap is secured between the shaft 486b and the first support portion 483 in the X-axis direction so that the first support portion 483 can move in the Y-axis direction and the Z-axis direction with respect to the shaft 486b. A gap is secured between the first support portion 483 and the protruding portion 486a in the Y-axis direction so that the first support portion 483 and the protruding portion 486a do not interfere with each other within the movable region of the yawing movement frame 408.

The first support portion 484 has a substantially U shape opened to the positive side in the Z-axis direction, and is formed on the outer peripheral portion of the yawing movement frame 408. A second support portion 487 is disposed at a position corresponding to the first support portion 484 of the third group frame 462. The second support portion 487 includes a pair of projecting portions 487a and a shaft 487b fixed between the pair of projecting portions 487a. The shaft 487b is, for example, a rod-shaped body extending in the Y-axis direction, and is inserted into the substantially U-shaped first support portion 484 from the Z-axis direction.
A minute gap is secured between the shaft 487b and the first support portion 484 in the X-axis direction so that the first support portion 484 can move with respect to the shaft 487b. A gap is secured between the first support portion 484 and the protrusion portion 487a in the Y-axis direction so that the first support portion 484 and the protrusion portion 487a do not interfere with each other within the movable region of the yawing movement frame 408.

The first support portion 485 is formed on the outer periphery of the yawing movement frame 408, and has a pair of protrusions 485a and a shaft 485b fixed between the pair of protrusions 485a. A second support portion 488 is disposed at a position corresponding to the first support portion 485 of the third group frame 462. The shaft 485b is, for example, a rod-like body extending in the Y-axis direction, and is inserted into the substantially U-shaped second support portion 488 from the Z-axis direction.
A minute gap is secured between the shaft 485b and the second support portion 488 in the X-axis direction so that the second support portion 488 can move relative to the shaft 485b. A gap is secured between the protruding portion 485a and the second support portion 488 in the Y-axis direction so that the protruding portion 485a and the second support portion 488 do not interfere within the movable region of the yawing movement frame 408.
With the above configuration, the yawing movement frame 408 is supported by the third group frame 462 so as to be movable within a certain range in a plane orthogonal to the second optical axis A2. Further, the yawing guide mechanism 480 restricts relative movement of the yawing movement frame 408 and the third group frame 462 to the positive side and the negative side in the X-axis direction. As a result, when the yawing movement frame 408 rotates, the position of the yawing movement frame 408 in the second optical axis A2 direction with respect to the third group frame 462 is stabilized, and deterioration in image blur correction performance can be prevented.

One of the first and second support portions is a rod-like body, and the other is a substantially U-shaped portion. For this reason, it is possible to restrict the yawing movement frame 408 from moving in the second optical axis A2 direction with respect to the third group frame 462 with a simple configuration.
As described above, in this image shake correction apparatus 400, the pitching moving frame 405 can be driven in the pitching direction with respect to the third group frame 462 by the linear electromagnetic actuator 412, and further, by the rotating electromagnetic actuator 414. The pitching moving frame 405 and the yawing moving frame 408 can be driven in the yawing direction with respect to the third group frame 462. That is, the image blur correction device 400 drives the third lens group G3 in the pitching direction and the yawing direction with respect to the second optical axis A2.
(4.2.3: Regarding positional relationship of each part of image blur correction apparatus 400)
The image blur correction apparatus 400 also has a feature regarding the positional relationship between the respective units. The positional relationship of each part will be described in detail with reference to FIGS. 13 is a schematic plan view of the pitching moving frame 405 and the electric board 406 as seen from the X axis direction negative side, and FIG. 14 is a schematic plan view of the pitching movement frame 405 and the electric board 406 as seen from the X axis direction positive side. 13 and 14 show a state where the second optical axis A2 coincides with the center C of the third lens group G3, that is, a state where the position of the third lens group G3 is near the center of the movable region.

As shown in FIGS. 13 and 14, in the state where the second optical axis A2 coincides with the center C of the third lens group G3, the Hall elements 406c and 406d of the image blur correction device 400 and the center Py of the coil 406b are They are arranged in a plane including the rotation axis A3 and the center C of the third lens group G3. That is, in the movable region of the pitching moving frame 405, the rotation axis A3, the center C of the third lens group G3, the Hall elements 406c and 406d, and the center Py of the coil 406b are arranged on a straight line L extending in the Z-axis direction. Yes.
Here, the center Py of the coil 406b means the center obtained from the planar outer shape of the coil 406b. For example, when the coil is substantially rectangular, it means the center of the rectangle. In the present embodiment, the center Py of the coil 406b is obtained from the dimensions of the coil 406b in the Y-axis direction and the Z-axis direction. The center Py substantially means the center (load generation point) of the load generation region of the electromagnetic actuator 414. In other words, in the electromagnetic actuator for rotation 414, the center Py is the center (load action point) of the load action area of the pitching movement frame 405. The center Pp of the coil 406a is the same as the center Py.

In the movable region of the pitching movement frame 405, there exists a state where the detection center Ry of the Hall element 406d coincides with the polarization line Qy of the magnet 462e. In a state where the detection center Ry of the Hall element 406d coincides with the polarization line Qy of the magnet 462e, the direction of the polarization line Qy of the magnet 462e substantially coincides with the pitching direction (Z-axis direction). Further, as shown in FIGS. 13 and 14, in the state where the second optical axis A2 coincides with the center C of the third lens group G3, the detection center Ry of the Hall element 406d substantially coincides with the polarization line Qy of the magnet 462e. ing.
In the state shown in FIGS. 13 and 14, the rotation axis A3, the center C of the third lens group G3, and the detection center Ry of the Hall element 406d are arranged on a substantially straight line L. A line segment connecting the rotation axis A3 and the detection center Rp of the Hall element 406c substantially coincides with the pitching direction (Z-axis direction).

As shown in FIGS. 13 and 14, the distance L1 between the rotation axis A3 and the center Py of the coil 406b is longer than the distance L0 between the rotation axis A3 and the center C of the third lens group G3. A distance L2 between the rotation axis A3 and the detection center Ry of the Hall element 406d is shorter than a distance L1 between the rotation axis A3 and the center Py of the coil 406b. A distance L3 between the rotation axis A3 and the detection center Rp of the Hall element 406c is shorter than a distance L4 between the rotation axis A3 and the center Pp of the coil 406a.
On the other hand, as shown in FIGS. 13 and 14, there is a state in which the detection center Rp of the Hall element 406c coincides with the polarization line Qp of the magnet 462c within the movable region of the pitching moving frame 405. In a state where the second optical axis A2 coincides with the center C of the third lens group G3, the detection center Rp of the Hall element 406c substantially coincides with the polarization line Qp of the magnet 462c.

In the state shown in FIGS. 13 and 14, the polarization line Qy and the straight line L are substantially orthogonal to the direction of the electromagnetic force Fy generated in the electromagnetic actuator 414. That is, in the state shown in FIGS. 13 and 14, the plane including the point of application of the electromagnetic force Fy and the rotation axis A3 is substantially orthogonal to the direction in which the electromagnetic force Fy acts.
Here, the “detection center of the Hall element” is a virtual point that can be considered that the Hall element is arranged at one point at the time of position detection. Examples of the detection center include a point where the detection sensitivity is maximum in the Hall element. In general, it can be assumed that the detection center is the center point of the detection surface of the Hall element. The “magnet polarization line” means a boundary line whose polarity changes between the N pole and the S pole. As shown in FIG. 17A, the magnetic flux density distribution of the magnet includes a usable area in which the magnetic flux density changes at a substantially constant rate with the polarization line as the center. The usable area means the range that can be used for position detection, and within the usable area, the measured value of the Hall element changes almost linearly according to the measurement position, and accurate position detection is possible. Become.

For example, as shown in FIG. 17B, if the relative position (measurement position) of the Hall element and the magnet changes within the usable area of the magnet, the measured value (output) of the Hall element changes in the relative position. It changes almost linearly. For this reason, it becomes possible to obtain | require the exact relative position with respect to the magnet of a Hall element based on the output of a Hall element. That is, the usable area of the magnet corresponds to the position detection performance guarantee range. If the movable range of the Hall element is within this performance guarantee range, the Hall element can withstand use as a position detection element for image blur correction.
In the case of the image blur correction device 400, the magnetic flux density distribution in the pitching direction (Z-axis direction) of the linearly moving magnet 462c includes a usable area centered on the polarization line Qp. The magnetic flux density distribution in the yawing direction (Y-axis direction) of the rotating magnet 462e includes a usable area centered on the polarization line Qy. The movable range of the detection center Rp of the Hall element 406c is set within the usable area of the magnet 462c. The movable range of the detection center Ry of the Hall element 406d is set within the usable area of the magnet 462e.

(4.2.4: Assembling method of the image blur correction device 400)
Further, the image blur correction apparatus 400 has a feature in an assembling method. A method for assembling the image blur correction apparatus 400, particularly a method for assembling the yawing movement frame 408 and the third group frame 462, will be described with reference to FIGS. FIG. 15 is an explanatory view of an assembling method of the yawing movement frame 408 and the third group frame 462 as viewed from the Y axis direction negative side, and FIG. 16 is a schematic view of the fitting state of the first support portion and the second support portion.
As shown in FIG. 15A, first, the yawing movement frame 408 is fitted to the surface of the third group frame 462 on the X axis direction negative side. At this time, as shown in FIGS. 16A and 16B, the first support portions 483 and 484 of the yawing movement frame 408 are inserted into the space around the second support portions 486 and 487 of the third group frame 462, and Two support portions 488 are inserted into the space around the first support portion 485.

Next, as shown in FIG. 15B, the yawing movement frame 408 is slid to the Z axis direction positive side with respect to the third group frame 462. As a result, as shown in FIG. 16C, the shafts 486b and 487b of the second support portions 486 and 487 are inserted into the substantially U-shaped first support portions 483 and 484, and the shaft 485b of the first support portion 485 is inserted. Is inserted into the substantially U-shaped second support portion 488.
Then, as shown in FIG. 15C, the sliding of the yawing moving frame 408 is stopped at a position where the centers of the holes 481a and 482a of the first bearing 481 and the second bearing 482 substantially coincide with each other, and the pins 481a and 481b are pinned. 430 is inserted from the X-axis direction negative side. At this time, the pin 430 is press-fitted into the hole 482 a of the second bearing 482 and fixed to the third group frame 462.
As described above, the yawing movement frame 408 and the third group frame 462 are connected by the first support portions 483, 484, 485 and the second support portions 486, 487, 488, and the pin 430 and the third group frame 462 are fixed. Can be performed by press-fitting. That is, unlike the conventional image blur correction device, for example, it is not necessary to bond and fix both ends of the yawing shaft to the holding frame.

Such a difference in assembly process occurs because, in the straight-ahead type as in the conventional image blur correction device, the direction in which the shaft extends and the direction in which the shaft is inserted are orthogonal to each other. This is because the direction in which the pin 430 extends coincides with the direction in which the pin 430 is inserted in such a rotation type.
Therefore, in the image blur correction apparatus 400, the bonding process of the pins 430 can be omitted, and there is no need to perform post-processing after bonding. That is, the manufacturing cost can be reduced.
Further, since the first support portions 483, 484, 485 and the second support portions 486, 487, 488 are positioned in the X-axis direction with respect to the third group frame 462 of the yawing movement frame 408 by three-point support, FIG. As shown in FIG. 5, the first bearing 481 and the second bearing 482 can be arranged apart from each other in the X-axis direction. That is, in the yawing guide mechanism 480, the first bearing 481 and the second bearing 482 do not need to position the yawing movement frame 408 and the third group frame 462 in the X-axis direction. For this reason, it is not necessary to increase the dimensional accuracy in the X-axis direction around the first bearing 481 and the second bearing 482, and the number of processing steps can be reduced. Thereby, the manufacturing cost can be reduced.

Further, as described above, the yaw movement frame 408 is mounted on the third group frame 462 and is slid in one direction, or the third group frame 462 and the yawing movement frame 408 can be assembled simply by inserting the pin 430. it can. For this reason, the assembly process can be easily automated, the variation in the assembly state can be reduced, and the assembly accuracy can be improved.
<5: Action effect>
The effects of the image blur correction apparatus 400 described above are as follows.
[5.1]
In this image blur correction apparatus 400, the yawing movement frame 408 is driven in the yawing direction (rotation direction) around the rotation axis A3 with respect to the third group frame 462. This eliminates the need for a guide shaft in the yawing direction. As a result, it is possible to reduce the size in the Y-axis direction perpendicular to the pitching direction.

In addition, in this image shake correction apparatus 400, a linear electromagnetic actuator is applied to the pitching movement frame 405 (more specifically, the electric substrate 406 to which the pitching movement frame 405 is fixed) to which the third lens group G3 is fixed. A driving force is directly applied from 412 and the electromagnetic actuator 414 for rotation. For this reason, compared with the case where the driving force of the electromagnetic actuators 412 and 414 does not directly act on the pitching movement frame 405, it is possible to prevent the position accuracy of the third lens group G3 from being lowered and to prevent the image blur correction performance from being lowered. it can.
As described above, the image blur correction apparatus 400 can be reduced in size while preventing a decrease in image blur correction performance.
[5.2]
In this image blur correction device 400, in the state where the detection center Ry of the Hall element 406d coincides with the polarization line Qy of the magnet 462e, the direction of the polarization line Qy of the magnet 462e is substantially the same as the pitching direction (Z-axis direction, rectilinear direction). I'm doing it. For this reason, when the pitching moving frame 405 is driven in the pitching direction via the pitching guide mechanism 470, the positional deviation in the yawing direction (rotation direction) between the detection center Ry of the Hall element 406d and the polarization line Qy of the magnet 462e is displaced. It is suppressed. As a result, the movable range of the detection center Ry of the Hall element 406d is likely to be within the usable area of the magnet 462e. Thereby, it is possible to prevent the position detection accuracy in the yawing direction from being lowered due to the operation in the pitching direction.

Here, when “the direction of the polarization line Qy of the magnet 462e substantially coincides with the pitching direction (Z-axis direction)”, the use of the magnet 462e is used in addition to the case where the polarization line Qy completely coincides with the pitching direction. This includes the case where the polarization line Qy and the pitching direction are deviated while the movable range of the detection center Ry of the Hall element 406d is within the possible region.
[5.3]
In the image blur correction device 400, the detection center Ry of the Hall element 406d substantially coincides with the polarization line Qy of the magnet 462e in a state where the center C of the third lens group G3 coincides with the second optical axis A2. For this reason, in the state where the center C of the third lens group G3 coincides with the second optical axis A2, the range of the detection center Ry of the Hall element 406d is likely to be within the usable area of the magnet 462e. Thereby, the fall of the position detection precision of a yawing direction can be prevented.

Here, when “the detection center Ry of the Hall element 406d substantially coincides with the polarization line Qy of the magnet 462e”, the magnet 462e can be used in addition to the case where the detection center Ry and the polarization line Qy completely coincide. This includes a case where the detection center Ry and the polarization line Qy are deviated while the movable range of the detection center Ry of the Hall element 406d is within the region.
[5.4]
In the image shake correction apparatus 400, the rotation axis A3, the center C of the third lens group G3, and the detection center Ry of the Hall element 406d are arranged on a substantially straight line L. For this reason, when the pitching moving frame 405 is driven in the pitching direction, the positional deviation between the detection center Ry of the Hall element 406d and the polarization line Qy of the magnet 462e is suppressed. As a result, the movable range of the detection center Ry of the Hall element 406d is likely to be within the usable area of the magnet 462e. Thereby, the fall of the position detection precision of a yawing direction can be prevented.

Here, “the rotation axis A3, the center C of the third lens group G3, and the detection center Ry of the Hall element 406d are arranged on a substantially straight line L” includes the rotation axis A3, the optical axis center, and the detection. In addition to the case where the center Ry is arranged in a straight line, the rotation axis A3, the optical axis center, and the detection center in a state where the movable range of the detection center Ry of the Hall element 406d is within the usable area of the magnet 462e. The case where Ry is shifted is also included.
[5.5]
In this image blur correction device 400, a line segment connecting the rotation axis A3 and the detection center Rp of the Hall element 406c substantially coincides with the pitching direction (Z-axis direction). For this reason, the movable range of the detection center Rp of the Hall element 406c is likely to be within the usable area of the magnet 462e in a state where the second optical axis A2 coincides with the center C of the third lens group G3. Thereby, the fall of the position detection precision of a pitching direction can be prevented.

Here, when “the line segment connecting the rotation axis A3 and the detection center Rp of the Hall element 406c substantially coincides with the pitching direction”, in addition to the case where the line segment and the pitching direction completely coincide, This includes a case where the line segment and the pitching direction are deviated while the movable range of the detection center Rp of the Hall element 406c is within the usable area of the magnet 462e.
[5.6]
In the image shake correction apparatus 400, the detection center Rp of the Hall element 406c substantially coincides with the polarization line Qp of the magnet 462c in a state where the second optical axis A2 coincides with the center C of the third lens group G3. For this reason, when the pitching moving frame 405 is driven in the yawing direction, the positional deviation between the detection center Rp of the Hall element 406c and the polarization line Qp of the magnet 462c is suppressed. As a result, the movable range of the detection center Rp of the Hall element 406c is likely to be within the usable area of the magnet 462c. Thereby, the fall of the position detection precision of a pitching direction can be prevented.

Here, when “the detection center Rp of the Hall element 406c substantially coincides with the polarization line Qp of the magnet 462c”, the detection of the Hall element 406c is performed in addition to the case where the detection center Rp and the polarization line Qp completely coincide. This includes the case where the detection center Rp and the polarization line Qp are deviated while the movable range of the center Rp is within the usable area of the magnet 462e.
[5.7]
In this image shake correction apparatus 400, the distance L1 between the rotation axis A3 and the center Py of the coil 406b is longer than the distance L0 between the rotation axis A3 and the center C of the third lens group G3. Therefore, the position of the center of gravity of the movable part (the part constituted by the pitching moving frame 405, the yawing moving frame 408, etc.) in the yawing direction of the image shake correction apparatus 400 is the third lens group G3 when viewed from the X-axis direction. Near the center C.

For example, when the weight W [N] of the movable part acts on the Y axis direction positive side, it is assumed that the center of gravity position of the movable part of the image blur correction device 400 is near the center C of the third lens group G3. When the distance from the rotation axis A3 to the point of action of the own weight W is L [m], and the distance from the rotation axis A3 to the center Py of the coil 406b is L1 [m], the rotating electromagnetic actuator 414 is used to support the own weight W. The electromagnetic force Fy [N] required in is as follows from the balance of moments.
Fy × L1 = W × L
As shown in FIG. 13, since L <L1, the relationship Fy <W is established. That is, driving in the yawing direction is possible with a driving force smaller than the force that supports the actual weight.

With the configuration described above, the electromagnetic force Fy required for the rotating electromagnetic actuator 414 can be reduced as compared with the conventional image blur correction apparatus. Thereby, the electromagnetic actuator 414 for rotation can be reduced in size, and the power consumption of the image blur correction apparatus 400 can be reduced.
[5.8]
In this image blur correction device 400, the distance L2 between the rotation axis A3 and the detection center Ry of the Hall element 406d is shorter than the distance L1 between the rotation axis A3 and the center Py of the coil 406b. For this reason, the movable range of the hall element 406d in the yawing direction is reduced, and as a result, the movable range of the detection center Ry of the hall element 406d can be contained within the usable area of the magnet 462e. Thereby, the fall of the position detection precision of a yawing direction can be prevented.

[5.9]
In the image blur correction device 400, the portion of the pitching moving frame 405 to which the third lens group G3 is fixed needs to be strong enough to hold the third lens group G3. For this reason, a part of the pitching moving frame 405 necessarily exists around the third lens group G3. In the present embodiment, the third lens group G3 is surrounded by the pitching movement frame 405 when viewed from the X-axis direction.
On the other hand, when the rotation axis A3 is arranged on the opposite side of the linear actuator 412 from the third lens group G3, the outer dimensions of the apparatus are increased only by the portion where the rotation axis A3 is further formed from the electromagnetic actuator 412.
However, in the image shake correction apparatus 400, the rotation axis A3 is disposed in a region between the linear electromagnetic actuator 412 and the third lens group G3. For this reason, the space around the third lens group G3 can be used effectively, and the size of the apparatus can be reduced. In particular, the dimension in the Z-axis direction can be shortened.

[5.10]
In this image blur correction device 400, the distance L3 between the rotation axis A3 and the detection center Rp of the Hall element 406c is shorter than the distance L4 between the rotation axis A3 and the center Pp of the coil 406a. For this reason, the movable range of the hall element 406c in the yawing direction is smaller than the movable range of the coil 406a in the yawing direction. As a result, the movable range of the detection center Rp of the Hall element 406c can be within the usable area of the magnet 462c. Thereby, the fall of the position detection precision of a pitching direction can be prevented.
[5.11]
In the image shake correction apparatus 400, the flexible portion 492 of the flexible printed circuit board 490 is disposed on the rotation axis A3 side of the third lens group G3. For this reason, the deformation amount of the flexible part 492 when the pitching moving frame 405 moves in the yawing direction can be suppressed, and disconnection of the flexible printed circuit board 490 can be prevented.

Further, when the deformation amount of the flexible portion 492 is reduced, the driving force for driving the pitching moving frame 405 in the yawing direction is reduced. As a result, the image blur correction apparatus 400 can reduce power consumption.
[5.12]
In the image shake correction apparatus 400, the third lens group G3 is disposed in a region between the rotating electromagnetic actuator 414 and the rectilinear electromagnetic actuator 412. That is, the rectilinear electromagnetic actuator 412 and the rotating electromagnetic actuator 414 are arranged on both sides of the third lens group G3. For this reason, the image blur correction apparatus 400 becomes longer in approximately one direction (in the present embodiment, the Z-axis direction as the pitching direction). In other words, the dimension in the Y-axis direction (yawing direction) orthogonal to the Z-axis direction can be reduced.

[5.13]
In this image blur correction device 400, the yawing guide mechanism 480 restricts the relative movement of the yawing movement frame 408 and the third group frame 462 in the X axis direction positive side and the negative side. As a result, the position of the yaw movement frame 408 in the second optical axis A2 direction relative to the third group frame 462 during rotation is stabilized, and a decrease in optical performance such as defocusing of the subject image can be prevented.
One of the first and second support portions is a rod-like body, and the other is a substantially U-shaped portion. For this reason, it is possible to restrict the yawing movement frame 408 from moving in the second optical axis A2 direction with respect to the third group frame 462 with a simple configuration.
[5.14]
The image shake correction apparatus 400 is mounted on a digital camera 1 having a bending optical system. Specifically, as shown in FIG. 6, the image blur correction device 400 is arranged so that the third lens group G3 can move within a plane orthogonal to the second optical axis A2. Image blur correction device 400 so that the pitching direction is orthogonal to first optical axis A1 and second optical axis A2, that is, the Y-axis direction (yawing direction) is substantially parallel to first optical axis A1. Is arranged.

In this case, since the image blur correction apparatus 400 is miniaturized in the Y-axis direction, the dimension in the first optical axis A1 direction, that is, the digital camera 1 can be thinned.
Further, the image blur correction apparatus 400 can prevent the image blur correction performance from being deteriorated as described above. For this reason, the digital camera 1 can acquire a high-quality image with corrected image blur.
[5.15]
In this method of manufacturing the image blur correction apparatus 400, the step of moving the yawing movement frame 408 with respect to the third group frame 462 in a direction orthogonal to the rotation axis A3, and the yawing movement frame 408 and the third group frame 462 are rotatable. Attaching a pin 430 for connection to the yawing movement frame 408 and the third group frame 462. The pin 430 is press-fitted into the hole 482a of the second bearing 482. Thereby, the adhesion process of the pin 430 can be shortened and the manufacturing cost can be reduced.

<6: Second Embodiment>
In the above-described image shake correction apparatus 400, the yawing movement frame 408 is rotatably held by the third group frame 462. For example, like the image shake correction apparatus 500 shown in FIG. 18, the yawing movement frame is a pitching movement frame. You may hold | maintain so that rotation is possible. In this case, the pitching moving frame 505 is held by the third group frame 562 so as to be able to go straight in the yawing direction via the pitching guide mechanism 570. The yawing movement frame 508 is fixed to the electric board 506. The yawing movement frame 508 and the electric board 506 are rotatably held by the pitching movement frame 505 via the yawing guide mechanism 580. The third lens group G3 is fixed to the yawing movement frame 508. The pitching moving frame 505 and the yawing moving frame 508 are rotatably connected by a pin 530. The pitching moving frame 505 is supported with respect to the third group frame 562 by three support portions.

As shown in FIG. 19, the planar arrangement of each component of the image blur correction apparatus 500 is the same as that of the image blur correction apparatus 400 described above. The image blur correction apparatus 500 can obtain the same effects as those of the image blur correction apparatus 400 described above as described below.
[6.1]
In this image blur correction apparatus 500, the yawing movement frame 508 rotates in the yawing direction about the rotation axis A3 with respect to the pitching movement frame 505. For this reason, a guide shaft corresponding to the yawing direction becomes unnecessary. Thereby, size reduction in the direction perpendicular to the pitching direction can be realized.
In addition, in this image blur correction apparatus 500, a linear electromagnetic actuator is applied to the yawing movement frame 508 (more specifically, the electric substrate 506 to which the yawing movement frame 508 is fixed) to which the third lens group G3 is fixed. The driving force is directly applied from 512 and the electromagnetic actuator 514 for rotation. For this reason, compared with the case where the driving force of the electromagnetic actuators 512 and 514 does not directly act on the yawing movement frame 508, it is possible to prevent the position accuracy of the third lens group G3 from being lowered and to prevent the image blur correction performance from being lowered. it can.

As described above, the image blur correction apparatus 500 can be reduced in size while preventing a decrease in image blur correction performance.
[6.2]
In this image blur correction apparatus 500, in a state where the detection center Ry of the Hall element 506d coincides with the polarization line Qy of the magnet 562e, the direction of the polarization line Qy of the magnet 562e is substantially the same as the pitching direction (Z-axis direction, straight direction). I'm doing it. For this reason, when the yawing movement frame 508 is driven in the pitching direction via the pitching movement frame 505, the positional deviation in the yawing direction (rotation direction) between the detection center Ry of the Hall element 506d and the polarization line Qy of the magnet 562e is displaced. It is suppressed. As a result, the movable range of the detection center Ry of the Hall element 506d is likely to be within the usable area of the magnet 562e. Thereby, it is possible to prevent the position detection accuracy in the yawing direction from being lowered due to the operation in the pitching direction.

Here, when “the direction of the polarization line Qy of the magnet 562e substantially coincides with the pitching direction (Z-axis direction)”, the use of the magnet 562e is used in addition to the case where the polarization line Qy and the pitching direction completely coincide. This includes the case where the polarization line Qy and the pitching direction are deviated while the movable range of the detection center Ry of the Hall element 506d is within the possible region.
[6.3]
In the image blur correction device 500, the detection center Ry of the Hall element 506d substantially coincides with the polarization line Qy of the magnet 562e in a state where the center C of the third lens group G3 coincides with the second optical axis A2. For this reason, in the state where the center C of the third lens group G3 coincides with the second optical axis A2, the range of the detection center Ry of the Hall element 506d is likely to be within the usable area of the magnet 562e. Thereby, the fall of the position detection precision of a yawing direction can be prevented.

Here, when “the detection center Ry of the Hall element 506d substantially coincides with the polarization line Qy of the magnet 562e”, the magnet 562e can be used in addition to the case where the detection center Ry and the polarization line Qy completely coincide. This includes the case where the detection center Ry and the polarization line Qy are deviated while the movable range of the detection center Ry of the Hall element 506d is within the region.
[6.4]
In the image shake correction apparatus 500, the rotation axis A3, the center C of the third lens group G3, and the detection center Ry of the Hall element 506d are arranged on a substantially straight line L. For this reason, when the yawing movement frame 508 is driven in the pitching direction, a positional deviation between the detection center Ry of the Hall element 506d and the polarization line Qy of the magnet 562e is suppressed. As a result, the movable range of the detection center Ry of the Hall element 506d is likely to be within the usable area of the magnet 562e. Thereby, the fall of the position detection precision of a yawing direction can be prevented.

Here, “the rotation axis A3, the center C of the third lens group G3, and the detection center Ry of the Hall element 506d are arranged on a substantially straight line L” includes the rotation axis A3, the optical axis center, and the detection. In addition to the case where the center Ry is arranged in a straight line, the rotation axis A3, the optical axis center, and the detection center in a state where the movable range of the detection center Ry of the Hall element 506d is within the usable area of the magnet 562e. The case where Ry is shifted is also included.
[6.5]
In this image blur correction apparatus 500, a line segment connecting the rotation axis A3 and the detection center Rp of the Hall element 506c substantially coincides with the pitching direction (Z-axis direction). For this reason, the movable range of the detection center Rp of the Hall element 506c is likely to be within the usable area of the magnet 562e in a state where the second optical axis A2 coincides with the center C of the third lens group G3. Thereby, the fall of the position detection precision of a pitching direction can be prevented.

Here, when “the line segment connecting the rotation axis A3 and the detection center Rp of the Hall element 506c substantially coincides with the pitching direction”, in addition to the case where the line segment and the pitching direction completely coincide, This includes the case where the line segment and the pitching direction are deviated within a range in which a decrease in position detection accuracy can be prevented.
[6.6]
In the image shake correction apparatus 500, the detection center Rp of the Hall element 506c substantially coincides with the polarization line Qp of the magnet 562c in a state where the second optical axis A2 coincides with the center C of the third lens group G3. For this reason, when the yawing movement frame 508 is driven in the yawing direction, the positional deviation between the detection center Rp of the Hall element 506c and the polarization line Qp of the magnet 562c is suppressed. As a result, the movable range of the detection center Rp of the Hall element 506c is likely to be within the usable area of the magnet 562c. Thereby, the fall of the position detection precision of a pitching direction can be prevented.

Here, when “the detection center Rp of the Hall element 506c substantially coincides with the polarization line Qp of the magnet 562c”, the position detection in the pitching direction is detected in addition to the case where the detection center Rp and the polarization line Qp completely coincide. The case where the detection center Rp and the polarization line Qp are deviated within a range in which a decrease in accuracy can be prevented is also included.
[6.7]
In this image shake correction apparatus 500, the distance L1 between the rotation axis A3 and the center Py of the coil 506b is longer than the distance L0 between the rotation axis A3 and the center C of the third lens group G3. Therefore, the position of the center of gravity of the movable part (the third lens group G3, the yawing movement frame 508, and the electric board 506) in the yawing direction of the image shake correction apparatus 500 is the same as that of the third lens group G3 when viewed from the X-axis direction. Near the center C.

For example, when the own weight W [N] of the movable part acts on the Y axis direction positive side, it is assumed that the position of the center of gravity of the movable part of the image blur correction device 500 is near the center C of the third lens group G3. When the distance from the rotation axis A3 to the acting point of the own weight W is L [m] and the distance from the rotation axis A3 to the center Py of the coil 506b is L1 [m], the electromagnetic actuator 514 for rotation is used to support the own weight W. The electromagnetic force Fy [N] required in is as follows from the balance of moments.
Fy × L1 = W × L
As shown in FIG. 19, since L <L1, the relationship of Fy <W is established. That is, driving in the yawing direction is possible with a driving force smaller than the force that supports the actual weight.

With the configuration described above, the electromagnetic force Fy required in the rotating electromagnetic actuator 514 can be reduced as compared with the conventional image blur correction device. As a result, the rotating electromagnetic actuator 514 can be reduced in size, and the power consumption of the image blur correction apparatus 500 can be reduced.
[6.8]
In this image shake correction apparatus 500, the distance L2 between the rotation axis A3 and the detection center Ry of the Hall element 506d is shorter than the distance L1 between the rotation axis A3 and the center Py of the coil 506b. For this reason, the movable range of the hall element 506d in the yawing direction is reduced, and as a result, the movable range of the detection center Ry of the hall element 506d can be contained within the usable area of the magnet 562e. Thereby, the fall of the position detection precision of a yawing direction can be prevented.

[6.9]
In the image blur correction apparatus 500, the portion of the yawing movement frame 508 to which the third lens group G3 is fixed needs to be strong enough to hold the third lens group G3. Therefore, a part of the yawing movement frame 508 always exists around the third lens group G3. In the present embodiment, the third lens group G3 is surrounded by the yawing movement frame 508 when viewed from the X-axis direction.
On the other hand, when the rotation axis A3 is arranged on the side opposite to the third lens group G3 of the linear electromagnetic actuator 512, the outer dimensions of the apparatus are increased only by a portion where the rotation axis A3 is further formed from the linear electromagnetic actuator 512.
However, in the image shake correcting apparatus 500, the rotation axis A3 is disposed in a region between the linear electromagnetic actuator 512 and the third lens group G3. For this reason, the space around the third lens group G3 can be used effectively, and the size of the apparatus can be reduced. In particular, the dimension in the Z-axis direction can be shortened.

[6.10]
In this image shake correction apparatus 500, the distance L3 between the rotation axis A3 and the detection center Rp of the Hall element 506c is shorter than the distance L4 between the rotation axis A3 and the center Pp of the coil 506a. For this reason, the movable range of the hall element 506c in the yawing direction is smaller than the movable range of the coil 506a in the yawing direction. As a result, the movable range of the detection center Rp of the Hall element 506c can be within the usable area of the magnet 562c. Thereby, the fall of the position detection precision of a pitching direction can be prevented.
[6.11]
In the image shake correction apparatus 500, the flexible portion 591 of the flexible printed circuit board 590 is disposed on the rotation axis A3 side of the third lens group G3. For this reason, the deformation amount of the flexible part 591 when the yawing movement frame 508 moves in the yawing direction can be suppressed, and disconnection of the flexible printed circuit board 590 can be prevented.

[6.12]
In the image shake correcting apparatus 500, the third lens group G3 is disposed in a region between the rotating electromagnetic actuator 514 and the rectilinear electromagnetic actuator 512. That is, the rectilinear electromagnetic actuator 512 and the rotating electromagnetic actuator 514 are arranged on both sides of the third lens group G3. For this reason, the image blur correction apparatus 500 is elongated in approximately one direction (in the present embodiment, the Z-axis direction as the pitching direction). In other words, it is possible to reduce the dimension in the Y-axis direction (yawing direction) orthogonal to the Z-axis direction in which the image blur correction apparatus 500 becomes longer.
[6.13]
In the image shake correcting apparatus 500, the yawing guide mechanism 580 regulates the relative movement of the yawing movement frame 508 and the pitching movement frame 505 in the positive and negative directions in the X-axis direction. As a result, the position of the yawing movement frame 508 in the second optical axis A2 direction relative to the pitching movement frame 505 when rotating can be stabilized, and deterioration in image blur correction performance can be prevented.

One of the first and second support portions is a rod-like body, and the other is a substantially U-shaped portion. For this reason, it is possible to restrict the yawing movement frame 508 from moving in the second optical axis A2 direction with respect to the pitching movement frame 505 with a simple configuration.
[6.14]
This image shake correction apparatus 500 is mounted on a digital camera 1 having a bending optical system. Specifically, the image blur correction device 500 is arranged so that the third lens group G3 can move within a plane orthogonal to the second optical axis A2. The image blur correction device 500 so that the pitching direction is orthogonal to the first optical axis A1 and the second optical axis A2, that is, the Y-axis direction (yawing direction) is substantially parallel to the first optical axis A1. Is arranged.
In this case, since the image blur correction apparatus 500 is downsized in the Y-axis direction, the dimension in the first optical axis A1 direction, that is, the digital camera 1 can be reduced in thickness.

Further, the image blur correction apparatus 500 can prevent the image blur correction performance from being deteriorated as described above. For this reason, the digital camera 1 can acquire a high-quality image with corrected image blur.
[6.15]
In the manufacturing method of the image blur correction apparatus 500, the yawing movement frame 508 is moved in a direction perpendicular to the rotation axis A3 with respect to the pitching movement frame 505, and the yawing movement frame 508 and the pitching movement frame 505 are rotatable. Attaching a pin 530 for connection to the yawing movement frame 508 and the pitching movement frame 505.
The yawing movement frame 508 has a first bearing 581. The pitching moving frame 505 has a second bearing 582. The first bearing 581 has a hole 581a, and the second bearing 582 has a hole 582a.

In the assembly process, the pin 530 is press-fitted into the hole 582a of the second bearing 582. Thereby, the adhesion process of the pin 530 can be shortened and the manufacturing cost can be reduced.
[6.16: Comparison between the first embodiment and the second embodiment]
Here, differences in configuration between the image blur correction apparatus 400 according to the first embodiment and the image blur correction apparatus 500 according to the second embodiment will be described.
As described above, in the image blur correction apparatus 400, the pitching movement frame 405 that goes straight in the pitching direction is supported by the yawing movement frame 408 that rotates in the yawing direction. For this reason, the linear electromagnetic actuator 412 only needs to drive the third lens group G3, the pitching movement frame 405, and the electric substrate 406. However, the rotation electromagnetic actuator 414 includes the third lens in addition to the yawing movement frame 408. It is also necessary to drive the group G3, the pitching moving frame 405, and the electric board 406. That is, the load on the rotating electromagnetic actuator 414 tends to increase.

However, as described above, by increasing the distance between the rotation axis A3 and the center Py of the rotation coil 406b, the required driving force in the rotation electromagnetic actuator 414 can be decreased. For this reason, the load of the electromagnetic actuator 414 for rotation can be reduced by adjusting the arrangement of the electromagnetic actuator 414.
On the other hand, in the image blur correction apparatus 500, a yawing movement frame 508 that rotates in the yawing direction is supported by a pitching movement frame 505 that goes straight in the pitching direction. For this reason, the electromagnetic actuator for rotation 514 only needs to drive the third lens group G3, the yawing movement frame 508, and the electric substrate 506, but the electromagnetic actuator for straight movement 512 includes the yawing movement frame 508 in addition to the pitching movement frame 505. Also, the electric board 506 needs to be driven. That is, the load on the linear electromagnetic actuator 512 tends to increase.

In this case, unlike the case of the image blur correction apparatus 400 described above, the load on the electromagnetic actuator 512 cannot be reduced even if the position of the linear electromagnetic actuator 512 is adjusted.
As described above, in the image shake correction apparatus using both the rotation mechanism and the rectilinear mechanism, the structure in which the rectilinear member is supported by the rotating member as in the first embodiment reduces the load during driving as the entire apparatus. Can be achieved. In other words, the image blur correction apparatus 400 can further reduce the driving load compared to the image blur correction apparatus 500.
<7: Other embodiments>
The specific configuration of the present invention is not limited to the above-described embodiment, and various changes and modifications can be made without departing from the scope of the invention.

[7.1]
The above-described image blur correction apparatuses 400 and 500 can be mounted on a camera other than the digital camera 1 having a bending optical system. Even in this case, it is possible to prevent a reduction in image blur correction performance while realizing downsizing of the camera.
[7.2]
The arrangement and shape of the first support part and the second support part are not limited to those described above. For example, the first support portions 483, 484, and 485 may be formed on the third group frame 462, and the second support portions 486, 487, and 488 may be formed on the yawing movement frame 408. The three first support portions 483, 484, 485 formed on the yawing movement frame 408 are substantially U-shaped, and the three second support portions 486, 487, 488 formed on the third group frame 462 are rod-shaped bodies. There may be. Furthermore, the substantially U shape may be another shape as long as it has two portions extending in parallel to each other.

[7.3]
In the above-described embodiment, the magnet of the electromagnetic actuator is two-pole magnetized, but the magnet magnetizing method is not limited to this. For example, the magnet magnetization method may be one-pole magnetization or three-pole magnetization. When the magnet is magnetized with three poles, the magnet has two polarization lines. If one of the polarization lines and the detection center of the Hall element coincide, the polarization line and the detection center Will match.
In addition, when the magnet is magnetized by one pole, there is no polarization line. In this case, the center line of the performance guarantee range in which the magnetic flux density changes at a substantially constant rate corresponds to the aforementioned polarization line. For this reason, in the case of unipolar magnetization, the coincidence of the center line and the detection center corresponds to the coincidence of the polarization line and the detection center.

  In the above-described embodiment, the N pole portion and the S pole portion of the magnet are physically integrated, but the state of the magnet is not limited to this. For example, even when the N pole portion and the S pole portion are physically separated, the boundary line where the polarity changes can be a polarization line.

  The image blur correction apparatus and the camera according to the present invention are useful in the field related to a camera in which downsizing and image blur correction performance are required.

Perspective view showing the appearance of a digital camera Perspective view showing the appearance of a digital camera Perspective view schematically showing the configuration of the main body Assembly perspective view of imaging device Illustration showing the configuration of the optical system (wide-angle end) Exploded perspective view of imaging device Perspective view of image blur correction apparatus Exploded perspective view of image blur correction device Perspective view of pitching moving frame and electric board Perspective view of yawing movement frame and third group frame Perspective view of yawing movement frame Schematic cross-section around the yawing guide mechanism in a plane that includes the rotation axis and is perpendicular to the Z-axis Schematic plan view of the pitching moving frame and electric board viewed from the negative side in the X-axis direction Schematic plan view of the pitching moving frame and electric board viewed from the positive side in the X-axis direction Explanatory drawing of the assembly method of the yawing movement frame and the third group frame viewed from the Y axis direction negative side Schematic diagram of the fitted state of the first support part and the second support part Illustration of the magnet's usable area and hall element performance guarantee range Exploded perspective view of an image blur correction device (another embodiment) Schematic plan view of the pitching moving frame and the electric substrate viewed from the positive side in the X-axis direction (another embodiment) Exploded perspective view of a conventional image blur correction device Exploded perspective view of a conventional image blur correction device Exploded perspective view of a conventional image blur correction device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Digital camera 2 Imaging device 11 Exterior part 18 Image display part 31 Lens barrel 32 CCD unit 41 First group frame unit 42 Second group frame unit G1 First lens group G3 Third lens group (correction lens)
A1 First optical axis A2 Second optical axis A3 Rotation axis Pp, Py center Qp, Qy Polarization line 405 Pitching moving frame (lens holding member)
408 Yawing movement frame (first holding member)
462 3rd group frame (second holding member)
400 Image shake correction device 470 Pitching guide mechanism 480 Yawing guide mechanism 412 Electromagnetic actuator in the pitching direction (straight drive unit)
414 Electromagnetic actuator in the yawing direction (rotation drive unit)
406c, 406d Hall element (position detection element)
430 pin 481 first bearing 482 second bearing 483, 484, 485 first support part 486, 487, 488 second support part

Claims (16)

An image shake correction apparatus for correcting image shake caused by camera movement,
A lens holding member to which a correction lens included in the optical system of the camera is fixed;
One of a straight traveling direction that is an arbitrary direction in a plane orthogonal to the optical axis of light incident on the correction lens and a rotational direction along an arc centering on a rotational axis substantially parallel to the optical axis in the plane. A first holding member that movably holds the lens holding member;
A second holding member that movably holds the first holding member in the other of the straight and rotational directions;
A linear drive unit for applying a driving force to the lens holding member in order to drive the lens holding member in the straight direction;
A rotation magnet and a rotation coil arranged to face the rotation magnet, and a driving force is applied to the lens holding member in order to drive the lens holding member in the rotation direction. A rotating drive unit,
With
When viewed from the direction along the optical axis, the distance between the center of the rotating shaft and the rotating coil, along with longer than the distance between the center of the correcting lens and the rotation axis,
A rotation position detecting element for detecting the position of the lens holding member in the rotation direction;
When viewed from the direction along the optical axis, the distance between the rotation axis and the detection center of the rotation position detection element is larger than the distance between the rotation axis and the center of the rotation coil. short,
Image shake correction device. Magnetic flux density distribution of the rotational direction before Symbol rotary magnet includes a rotating available area where the magnetic flux density changes at a substantially constant rate,
When viewed from the direction along the optical axis, a state in which the detection center of the rotation position detection element coincides with the center line of the rotation usable area in the rotation direction in the movable region of the lens holding member. Exist,
The image blur correction apparatus according to claim 1. The use for rotation in the rotation direction when the detection center of the position detection element for rotation coincides with the center line of the usable area for rotation in the rotation direction when viewed from the direction along the optical axis. The direction of the center line of the possible area substantially coincides with the straight direction,
The image blur correction device according to claim 2. When the optical axis of the light incident on the correction lens coincides with the center of the correction lens when viewed from the direction along the optical axis, the detection center of the rotational position detection element is the rotation in the rotation direction. Approximately matches the center line of the usable area,
The image blur correction device according to claim 2. When viewed from the direction along the optical axis, the rotation axis, the center of the correction lens, and the detection center of the rotation position detection element are arranged in a substantially straight line.
The image blur correction device according to claim 2. A straight position detecting element for detecting the position of the lens holding member in the straight direction;
When viewed from the direction along the optical axis, a line segment connecting the rotation axis and the detection center of the rectilinear position detecting element substantially coincides with the rectilinear direction.
The image blur correction device according to claim 1. A straight position detecting element for detecting the position of the lens holding member in the straight direction;
The straight drive unit has a straight magnet,
The magnetic flux density distribution in the linear direction of the linear magnet includes a usable area for linear movement in which the magnetic flux density changes at a substantially constant rate,
When viewed from the direction along the optical axis, a state in which the detection center of the rectilinear position detecting element coincides with the center line of the rectilinear usable area in the rectilinear direction in the movable region of the lens holding member. Exists,
The image blur correction device according to claim 1. When viewed from the direction along the optical axis, the detection center of the rectilinear position detecting element in the straight traveling direction is in the state where the optical axis of the light incident on the correction lens coincides with the center of the correction lens. It almost coincides with the center line of the usable area for straight running,
The image blur correction apparatus according to claim 7. The rotation shaft is disposed in a region between the straight drive unit and the correction lens;
Image blur correction device according to any one of claims 1 to 8. A straight position detecting element for detecting the position of the lens holding member in the straight direction;
The rectilinear drive unit includes a rectilinear magnet and a rectilinear coil disposed to face the rectilinear magnet,
The distance between the rotation axis and the detection center of the linear movement position detection element is shorter than the distance between the rotation axis and the center of the linear movement coil,
Image blur correction device according to any one of claims 1-9. In order to supply a voltage to the rotation drive unit, further comprising a flexible printed circuit board electrically connected to the rotation drive unit,
The flexible printed circuit board can be bent by connecting the first fixing portion fixed to the lens holding member, the second fixing portion fixed to the second holding member, and the first and second fixing portions. A flexible portion,
The flexible portion is disposed on the rotation axis side of the correction lens.
Image blur correction device according to claim 1 1 0. The correction lens is disposed in a region between the rotation drive unit and the straight drive unit.
Image blur correction device according to any of claims 1 1 1. A rotating member that is one of the lens holding member and the first holding member and is held so as to be movable in the rotation direction.
One of the first and second holding members, with respect to the rotation holding member that holds the rotation member,
And further comprising at least three support portions that are movably held in a plane perpendicular to the optical axis and restrict movement to both sides in a direction along the optical axis.
Image blur correction device according to claim 1 1 2. Each of the at least three support portions includes a first support portion formed on the rotation member, and a first support portion formed on the rotation holding member and capable of being fitted into the first support portion from a direction perpendicular to the rotation axis. 2 support parts,
One of the first and second support parts is a rod-shaped body,
The other of the first and second support portions is a substantially U-shaped body that is fitted into the rod-shaped body.
Image blur correction device according to claim 1 3. A first lens group for capturing light along a first optical axis;
A bending optical system that bends light incident along the first optical axis in a direction along a second optical axis that intersects the first optical axis;
A second lens group that includes a correction lens that performs image blur correction, and captures light bent by the bending optical system;
It said image blur correction apparatus according to any one of claims 1 to 1 4,
An imaging unit that receives light that has passed through the second lens group;
A lens barrel in which the first lens group, the bending optical system, the second lens group, the image blur correction device, and the imaging unit are disposed;
A casing for holding the lens barrel;
With a camera. The rectilinear direction is substantially parallel to a direction orthogonal to the first and second optical axes.
The camera of claim 1 5.

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