JP2008191267A - Image blur compensation apparatus, lens barrel and imaging apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the following problem: when an image blur compensation apparatus is mounted on a lens barrel and the moving position of a moving frame is set through the use of a chart, large-scale equipment is required to set the reference position, then, the cost is drastically increased. <P>SOLUTION: A limiting projection part 32 is disposed on a support frame 4, and a limited part 16 is disposed on the moving frame 3, and the limiting projection part 32 and the limited part 16 are brought in contact with each other on a line aligned with the center F1 of a thrust generated by a first motor-driven actuator 6 and a line aligned with the center F2 of a thrust generated by a second motor-driven actuator 7 so as to limit the movement of the moving frame 3 in the first direction X and the second direction Y. The reference position of the moving frame 3 is set based on the outputs of first and second Hall elements 8A and 8B in the movement-limited position. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an image blur correction apparatus that corrects image blur caused by vibration during shooting, a lens barrel having the image blur correction apparatus, and a digital still camera, a video camera, and the like including the lens barrel. It relates to the device.

  In recent years, there has been a remarkable improvement in the performance of imaging devices such as digital still cameras and video cameras, and anyone can easily shoot high-quality, high-performance still images and moving images. The improvement in performance of such an image pickup apparatus is largely due to the high performance of lenses, image pickup elements (CCD, CMOS, etc.) and image processing circuits.

  However, no matter how high the performance of the lens, image sensor, etc., if the hand that supports the camera (imaging device) shakes or shakes, the high-resolution screen will be blurred and the image will be blurred. Will be reflected. For this reason, some relatively expensive cameras are equipped with an image blur correction device that corrects image blur caused by camera shake during shooting. However, a camera that originally requires image blur correction is not a high-end model used by professionals who are shooting professionals, but rather is required for a popular model used by the majority of the public with little shooting experience. It is.

  In general, there is a strong demand for miniaturization and weight reduction for cameras (imaging devices), and cameras that are light and easy to hold are preferred. However, the conventional image blur correction apparatus is relatively large. For this reason, when this conventional image blur correction device is mounted on the camera body, the entire camera becomes large, which is contrary to the demand for reduction in size and weight. In addition, the conventional image blur correction apparatus requires a large number of parts, and there is a problem that the cost increases due to an increase in the number of parts.

  As a conventional image blur correction device of this type, for example, there is a device described in Patent Document 1. Patent Document 1 describes a lens shift device that shifts a lens that decenters an optical axis such as a lens group. The lens shift device described in Patent Document 1 includes: “a lens that decenters the optical axis, a fixing member that has a reference plane perpendicular to the optical axis, a plane that is parallel to and faces the reference plane, A movable member that holds the lens and shifts the lens in a plane perpendicular to the optical axis, at least three rotatable balls sandwiched between the two planes, and a holder for holding the ball A member and an elastic member that generates a pressing force for clamping the ball between the two planes and prevents the movable member from rotating about the optical axis ”.

According to the invention described in Patent Document 1, “the lens can be shifted so as to keep the drive resistance as low as possible with a simple configuration and to be surely kept perpendicular to the optical axis without any play (paragraph number [ [0060] See FIG.
JP-A-10-319465

  The lens shift device described in Patent Document 1 includes a movable member that holds a lens that decenters the optical axis (hereinafter referred to as a “correction lens” because it corresponds to the correction lens of the present invention), and moves the movable member. The configuration includes a fixed member that can be supported, and a rotatable ball interposed between the movable member and the fixed member. Then, by detecting the position of the movable member (correction lens) by the position detector, the correction lens is driven and image blur correction is performed. In order to detect the position of the movable member, it is necessary to set the reference position of the movable member. Therefore, in the lens shift device as described above, the reference position of the movable member is generally set using an adjustment chart.

  Here, the setting of the reference position of the movable member using the chart will be described. To set the reference position of the movable member, first, a lens shift device is mounted on a lens barrel provided with a lens group and an image sensor. Next, an adjustment chart is arranged in front of the objective lens of the lens barrel on which the lens shift device is mounted, and an image of the chart is formed on the imaging surface of the imaging element. Then, while observing the image of the formed chart, the movable member of the lens shift device is driven so that the optical axis of the correction lens coincides with the optical axis of the lens group of the lens barrel. And the position where both the optical axes corresponded is set as a reference position of a movable member.

  However, in setting the reference position of the movable member using the chart as described above, it is necessary to mount the lens shift device on the lens barrel, and the reference position of the movable member cannot be set by the lens shift device alone. was there. Moreover, it was necessary to provide a wide space for installing the chart and a facility for displaying the chart image. Furthermore, there is a problem in that the number of work steps for installing the chart increases, resulting in a significant cost increase.

  The problem to be solved is that when the image blur correction device is mounted on the lens barrel and the reference position of the moving frame is set using a chart, the equipment for setting the reference position of the moving frame becomes large and greatly increased. This leads to a significant cost increase.

  An image blur correction apparatus according to the present invention includes a correction lens, a moving frame that holds the correction lens, a support frame that supports the moving frame movably on a plane orthogonal to the optical axis of the correction lens via a movement guide, An elastic member that urges the moving frame toward the support frame, a first electric actuator that generates a first thrust that moves the moving frame in a first direction orthogonal to the optical axis of the correction lens, and a correction of the moving frame A second electric actuator that generates a first thrust that moves in a second direction that is orthogonal to the optical axis of the lens and that is also orthogonal to the first direction; and one of the moving frame and the support frame. A restriction convex part, and a restriction receiving part which is provided on the other of the moving frame and the support frame and is engaged with the restriction convex part. The limiting protrusion and the limiting receiving portion are engaged on the extension line of the center portion of the first thrust to limit the movement of the moving frame in the first direction and extend the center portion of the first thrust. The main feature is to engage on the line and limit the movement of the moving frame in the second direction.

  The lens barrel of the present invention includes a cylindrical body in which a lens system is housed, and an image blur correction device having a correction lens for correcting image blur of the lens system. The image blur correction apparatus for a lens barrel includes a moving frame that holds a correction lens, a support frame that supports the moving frame via a movement guide so as to be movable on a plane orthogonal to the optical axis of the correction lens, and a moving frame. An elastic member that urges the moving frame toward the support frame, a first electric actuator that generates a first thrust for moving the moving frame in a first direction orthogonal to the optical axis of the correction lens, and the moving frame of the correction lens. A second electric actuator that generates a first thrust that moves in a second direction that is perpendicular to the optical axis and also perpendicular to the first direction; and a limiting protrusion provided on one of the moving frame and the support frame And a restriction receiving part that is provided on the other of the moving frame and the support frame and that engages with the restriction convex part. The limiting protrusion and the limiting receiving portion are engaged on the extension line of the center portion of the first thrust to limit the movement of the moving frame in the first direction and extend the center portion of the first thrust. Engage on the line to limit the movement of the moving frame in the second direction.

  According to another aspect of the present invention, there is provided an imaging apparatus including: a lens barrel including a lens body housing a lens system; and an image blur correction apparatus having a correction lens for correcting image blur of the lens system; and a lens barrel And an apparatus main body to which is attached. An image blur correction apparatus according to the imaging apparatus includes a moving frame that holds a correction lens, a support frame that supports the moving frame via a movement guide so as to be movable on a plane orthogonal to the optical axis of the correction lens, and a moving frame. An elastic member that urges the moving frame toward the support frame, a first electric actuator that generates a first thrust for moving the moving frame in a first direction orthogonal to the optical axis of the correction lens, and the moving frame of the correction lens. A second electric actuator that generates a first thrust that moves in a second direction that is perpendicular to the optical axis and also perpendicular to the first direction; and a limiting protrusion provided on one of the moving frame and the support frame And a restriction receiving part that is provided on the other of the moving frame and the support frame and that engages with the restriction convex part. The limiting protrusion and the limiting receiving portion are engaged on the extension line of the center portion of the first thrust to limit the movement of the moving frame in the first direction and extend the center portion of the first thrust. Engage on the line to limit the movement of the moving frame in the second direction.

  According to the image blur correction device, the lens barrel, and the imaging device of the present invention, the moving frame can be moved in the first direction and the second direction, and the movement can be stopped within a predetermined range. In addition, it is possible to prevent the moving frame from rotating at the position to be stopped. As a result, the moving frame is moved in the first direction and the second direction until movement is restricted, the position of the moving frame at that time is detected, and the reference position of the moving frame is accurately determined based on the detected output. Can be set.

  Image blur correction apparatus capable of accurately and easily setting a reference position of a moving frame movable on a plane perpendicular to the optical axis of the correction lens, a lens barrel including the image blur correction apparatus, and The imaging device was realized with a simple structure.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 1 to 28 illustrate an example of an embodiment of the present invention. 1 is a perspective view showing a first embodiment of the image blur correction apparatus of the present invention, FIG. 2 is a plan view, FIG. 3A is a front view, FIG. 3B is a right side view, and FIG. FIG. 4B is a sectional view of the BB line portion, FIG. 5 is an exploded perspective view, and FIG. 6 is an explanatory view of the state shown in FIG. FIG. 7 is an exploded perspective view showing components, and FIG. 8 is a perspective view in a state where the lower surface of the moving frame shown in FIG. 7 is directed upward. 9 is an explanatory view showing the arrangement of the position detector according to the image blur correction apparatus of the present invention, FIG. 10 is an explanatory view showing a position detecting mechanism, FIG. 10A is an explanatory view showing a schematic configuration, and FIG. 11A to 11D are explanatory diagrams for explaining examples of movement guides, and FIGS. 12A to 12C are explanatory diagrams for explaining a state in which the movement frame is at the reference position. FIG. 13A and 13B are explanatory diagrams for explaining a state in which the moving frame has moved in one (+) of the first direction, and FIGS. 14A and 14B show a state in which the moving frame has moved in the other (−) of the first direction. FIG. 15A and FIG. 15B are explanatory diagrams for explaining a state in which the moving frame has moved to one (+) in the second direction, and FIG. 16A and FIG. It is explanatory drawing explaining the state which moved to) .

  FIG. 17 is an explanatory diagram for explaining a second embodiment of the image blur correction device of the present invention, and FIG. 18 is an explanatory diagram for explaining a third embodiment of the image blur correction device of the present invention. 19 to 21 show a first embodiment of the lens barrel of the present invention. FIG. 19 is a perspective view, FIG. 20A is a front view, FIG. 20B is a left side view, and FIG. It is explanatory drawing explaining these. 22 to 25 show a first embodiment of the imaging apparatus of the present invention. FIG. 22 is a perspective view seen from the front side, and FIG. 23 is a perspective view in which the objective lens is exposed by moving the lens cover. 24 is a rear view, and FIG. 25 is a plan view. FIG. 26 is a block diagram for explaining the control concept of the image blur correction device of the present invention, FIG. 27 is a block diagram showing a first embodiment of the schematic configuration of the image pickup device according to the present invention, and FIG. It is a block diagram which shows the 2nd Example of schematic structure.

  The first embodiment of the image blur correction apparatus according to the present invention shown in FIGS. 1 to 16 is configured as an image blur correction apparatus 1 having a moving magnet type drive mechanism. As shown in FIGS. 1 to 7, the image blur correction apparatus 1 corrects the correction lens 2 for correcting the image blur of the lens system, the moving frame 3 that holds the correction lens 2, and the moving frame 3. Three tension coil springs 5A, 5B, showing a specific example of a support frame 4 that is movably supported on a plane perpendicular to the optical axis of the lens 2 and an elastic member that biases the movement frame 3 toward the support frame 4 5C, a first electric actuator 6 that moves the moving frame 3 in a first direction X that is orthogonal to the optical axis of the lens system, and a direction that is orthogonal to the optical axis of the lens system and that is the first A second electric actuator 7 that moves in a second direction Y that is also orthogonal to the direction X, a restriction receiving portion 16 that is provided on the moving frame 3, a restriction convex portion 32 that is provided on the support frame 4, and the moving frame 3 The 1st which shows one specific example of the position detector which detects the position regarding the 1st direction of And the Hall elements 8A, is configured to include a second Hall element 8B and the like showing a specific example of a position detector for detecting the position relative to the second direction Y of the moving frame 3.

  The correction lens 2 moves its position in the first direction X and / or the second direction Y according to the amount of image blur at the time when the camera body, which will be described later, shakes due to hand tremor or the like. This corrects image blur. The correction lens 2 is fixed to the moving frame 3.

  As shown in FIG. 5 to FIG. 8 and the like, the moving frame 3 includes a lens fixing portion 11 made of a substantially circular plate, and three moving frame side claw portions 12A, 12B provided integrally with the lens fixing portion 11. 12C, and a first magnet fixing portion 13A and a second magnet fixing portion 13B, which are provided integrally with the lens fixing portion 11, and the like.

  A fitting hole 15 into which the correction lens 2 is fitted is provided at a substantially central portion of the lens fixing portion 11, and the correction lens 2 is fixed to the fitting hole 15 by a fixing means such as an adhesive. Is attached. A restriction receiving portion 16 is provided on the lower surface of the moving frame 3 facing the support frame 4. The restriction receiving portion 16 is formed as an inner peripheral surface of the fitting hole 15. In the fitting hole 15 as the restriction receiving portion 16, a restriction convex portion 32 (to be described later) of the support frame 4 is inserted, and is engaged so as to be movable in the radial direction within a predetermined range.

  Further, on the lower surface of the moving frame 3 facing the support frame 4, three spherical protrusions 17 are provided that show a first specific example of the moving guide. These three spherical protrusions 17 are arranged around the restriction receiving portion 16 at equal intervals. Each of the three spherical protrusions 17 has a spherical surface 17 a at the tip, and the spherical surface 17 a is in point contact with three guide receiving portions 34 described later of the support frame 4.

  The three moving frame side claws 12 </ b> A, 12 </ b> B, and 12 </ b> C are arranged at equal intervals on the side surface of the lens fixing portion 11. These three moving frame side claw portions 12A, 12B, and 12C each protrude outward in the radial direction of the lens fixing portion 11, and have an L shape with a side surface projecting upward. One end of each of the three tension coil springs 5A, 5B, and 5C is engaged with the three moving frame side claw portions 12A, 12B, and 12C in a state where the image blur correction device 1 is assembled.

  The first magnet fixing portion 13A is provided on the outer side in the radial direction of the lens fixing portion 11, and the direction connecting the first magnet fixing portion 13A and the fitting hole 15 is a first direction X. The first magnet fixing portion 13 </ b> A has two protruding pieces 18 and 18 protruding in the first direction X. Further, the second magnet fixing portion 13B is disposed at a position that is rotationally displaced by approximately 90 degrees from the first magnet fixing portion 13A, and the direction connecting the second magnet fixing portion 13B and the fitting hole 15 is the first. The direction Y is 2. The second magnet fixing portion 13B has two projecting pieces 19 and 19 projecting in the second direction Y.

  Between the protruding pieces 18 and 18 of the first magnet fixing portion 13A, the first magnet 21 and the first back yoke 23 constituting a part of the first electric actuator 6 are fixed by an adhesive, a fixing screw, or the like. It is fixed by the method. Further, a second magnet 22 and a second back yoke 24 constituting a part of the second electric actuator 7 are provided between the protruding pieces 19 and 19 of the second magnet fixing portion 13B with an adhesive, a fixing screw, or the like. It is fixed by the fixing method.

  The first magnet 21 and the second magnet 22 are each formed in the same shape as a rectangular flat plate, and are magnetized so as to generate a magnetic force having the same strength in a predetermined direction. That is, the first magnet 21 and the second magnet 22 have different polarities so that the plane direction is divided into two equal parts, and the polarities so that the thickness direction perpendicular to the plane direction is also divided into two equal parts. It is configured differently.

  In this embodiment, as shown in FIG. 12B and the like, the first magnet 21 is N on the inner side in the radial direction near the correction lens 2 on the surface facing the support frame 4 (the surface closer to the first coil 27). The pole is magnetized, and the south pole is magnetized radially outward from the correction lens 2. Then, on the surface opposite to the support frame 4 of the first magnet 21 (surface far from the first coil 27), the S pole is magnetized radially inward near the correction lens 2, and from the correction lens 2. N poles are magnetized on the radially outward side.

  Further, as shown in FIG. 12C and the like, the second magnet 22 has an N pole magnetized radially inward near the correction lens 2 on the surface facing the support frame 4, and radially outward from the correction lens 2. The S pole is magnetized. Then, on the surface of the second magnet 22 opposite to the support frame 4, an S pole is magnetized radially inward near the correction lens 2 and an N pole is magnetized radially outward away from the correction lens 2. ing. However, the arrangement of the polarities of the first and second magnets 21 and 22 is not limited to this embodiment, and the polarities different in the planar direction and the thickness direction can be arranged in reverse.

  As shown in FIG. 7 and the like, the first back yoke 23 and the second back yoke 24 are each formed in the same shape as a rectangular flat plate, and the size of the plane is the first and second magnets 21 and 22. Is set to the same size. The first back yoke 23 is fixed to one surface of the first magnet 21 (the surface opposite to the support frame 4) by a fixing method such as an adhesive. The second back yoke 24 is fixed to one surface of the second magnet 22 (the surface opposite to the support frame 4) by a fixing method such as an adhesive.

  The support frame 4 is a circular plate larger than the moving frame 3. The support frame 4 includes a through hole 31 provided in the central portion, a restriction convex portion 32 provided so as to protrude on one surface, and three support frame side claw portions 33A, 33B provided so as to protrude on the same surface. 33C and three guide receiving portions 34 provided by forming a concave portion on one surface thereof.

  The limiting convex portion 32 of the support frame 4 is formed as a cylindrical (ring-shaped) cylindrical body portion surrounding the through hole 31, and the opening hole 32 a is continuous with the through hole 31. The restriction convex portion 32 is set smaller than the restriction receiving portion 16 provided on the moving frame 3, and is inserted into the restriction receiving portion 16 in a state where the image blur correction device 1 is assembled. The movable frame 3 and the support frame 4 are relatively movable in the respective plane directions within a gap set between the restricting convex portion 32 and the fitting hole 15 which is a restricting receiving portion. . Then, the inner peripheral surface of the restriction receiving portion 16 provided on the moving frame 3 abuts on the outer peripheral surface of the restricting convex portion 32 provided on the support frame 4, so that the lens frame of the moving frame 3 is orthogonal to the optical axis. The movement range is limited. In other words, the operation restricting mechanism 9 that restricts the movement of the moving frame 3 in the first direction X and the second direction Y by the restricting convex portion 32 provided on the support frame 4 and the restriction receiving portion 16 provided on the moving frame 3. Is configured.

  The three support frame side claw portions 33A, 33B, and 33C are arranged at equal intervals in the circumferential direction so as to correspond to the three movement frame side claw portions 12A, 12B, and 12C of the movement frame 3. It is set to be radially outward from 12A, 12B, 12C. These three support frame side claws 33A, 33B, and 33C have three tension coil springs each having one end engaged with the moving frame side claws 12A, 12B, and 12C in a state where the image blur correction device 1 is assembled. The other ends of 5A, 5B, and 5C are engaged.

  As a result, the three tension coil springs 5A, 5B, 5C are stretched radially around the optical axis of the correction lens 2, and each exerts a spring force that pulls the moving frame 3 obliquely toward the support frame 4. . For this reason, the moving frame 3 is urged toward the support frame 4, and on the plane orthogonal to the optical axis of the correction lens 2, three directions are formed at equiangular intervals of about 120 degrees around the optical axis of the correction lens 2. Pulled on. In this state, the optical axis of the correction lens 2 fixed to the moving frame 3 is substantially coincident with the center of the through hole 31 of the support frame 4.

  The three guide receiving portions 34 are each formed as a circular concave portion, and are arranged at equal intervals around the limiting convex portion 32. A lubricant such as lubricating oil is applied to these three guide receiving portions 34, and the spherical surface 17a of the spherical protrusion 17 provided on the moving frame 3 is brought into point contact via the lubricant. Therefore, the frictional resistance generated between the guide receiving portion 34 and the spherical protrusion 17 can be reduced, the loss of the driving force of each of the electric actuators 6 and 7 can be reduced, and the moving frame can be made with a small driving force (thrust). 3 can be moved. In the present embodiment, the number of the guide receiving portions 34 and the spherical protrusions 17 is three in order to ensure the stability of the moving frame 3. However, the present invention is not limited to this, and the sphere and guide according to the present invention are not limited thereto. The number of receiving parts may be four or more.

  In this embodiment, as shown in FIG. 11A and the like, the spherical protrusion 17 is applied as a specific example of the movement guide. However, the movement guide according to the present invention is not limited to this. Absent. As the movement guide according to the present invention, for example, as shown in FIG. 11B, a sliding protrusion 41 provided integrally with the movement frame 3 can be applied.

  As shown in FIG. 11B, a sliding surface 41 a that forms a plane parallel to the horizontal direction is formed at the tip of the sliding protrusion 41, and this sliding surface 41 a is in surface contact with the guide receiving portion 34. . A lubricant is interposed between the guide receiving portion 34 and the sliding surface 41 a of the sliding protrusion 41. As a result, the frictional resistance generated between the guide receiving portion 34 and the sliding surface 41a can be reduced, and the loss of the driving force of each of the electric actuators 6 and 7 can be reduced to move with a small driving force (thrust). The frame 3 can be moved.

  As the movement guide according to the present invention, for example, as shown in FIGS. 11C and 11D, a sphere 42 can be applied. The guide receiving portion 34a shown in FIG. 11C is formed as a circular recess having a diameter larger than the diameter of the sphere 42, and thereby holds the sphere 42 so as to be freely rollable. Further, the guide receiving portion 34b shown in FIG. 11D is formed as a circular recess having a diameter substantially the same as the diameter of the sphere 42, thereby holding the sphere 42 rotatably at substantially one point. With this configuration, the frictional resistance generated between the moving frame 3 and the guide receiving portions 34a and 34b and the sphere 42 can be reduced, and the loss of the driving force of the electric actuators 6 and 7 can be reduced. Thus, the moving frame 3 can be moved with a small driving force (thrust).

  The material of the sphere 42 is preferably one that is not affected by the magnetic force of the first and second magnets 21 and 22 and that has high strength, such as ceramic and stainless steel. However, the sphere 42 may be a metal such as structural carbon steel that is affected by a magnetic force, and an engineering plastic may be used regardless of whether or not it is a magnetic body.

  A flexible wiring board 29 is placed on the support frame 4. The flexible wiring board 29 connects the first coil mounting portion 29 a facing the first magnet 21 of the moving frame 3 and the second coil mounting portion 29 b facing the second magnet 22 of the moving frame 3. It has the connection part 29c. A first coil 27 constituting a part of the first electric actuator 6 is mounted on the first coil mounting part 29a, and a part of the second electric actuator 7 is mounted on the second coil mounting part 29b. A second coil 28 is mounted.

  The first coil 27 and the second coil 28 are flat coils wound in a planar shape and have a substantially elliptical shape, and each is formed by winding one coil wire. The first coil 27 is electrically connected to a predetermined wiring pattern provided on the first coil mounting portion 29a of the flexible wiring board 29, and the second coil 28 is connected to the second coil mounting portion 29b. It is electrically connected to a predetermined wiring pattern provided.

  As shown in FIG. 7, in the two coils 27 and 28, the two straight portions on the long side facing each other in the width direction respectively generate thrust generating portions 27a and 27b and thrust generating portions 28a and 28b that generate thrust as actuators. It has become. The first coil 27 is disposed such that the direction in which the thrust generating portions 27 a and 27 b extend is directed in a direction orthogonal to the first direction X. The second coil 28 is disposed such that the direction in which the thrust generating portions 28 a and 28 b extend is directed in a direction orthogonal to the second direction Y.

  In a state where the image blur correction device 1 is assembled, one magnetic pole portion (S pole in this embodiment) of the first magnet 21 is opposed to the thrust generating portion 27a of the first coil 27. The other magnetic pole part (N pole in this embodiment) of the first magnet 21 is opposed to the thrust generating part 27b of the first coil 27. Further, one magnetic pole portion (S pole in this embodiment) of the second magnet 22 is opposed to the thrust generating portion 28a of the second coil 28, and the second magnet 22 is opposed to the thrust generating portion 28b. The other magnetic pole part (N pole in this embodiment) is opposed.

  The first electric actuator 6 is configured by the first coil 27, the first magnet 21, and the first back yoke 23 described above. The second electric actuator 7 is configured by the second coil 28, the second magnet 22, and the second back yoke 24.

  In such an arrangement, when a current is passed through the first coil 27, the magnetic force of the first magnet 21 acts in a direction perpendicular to the first coil 27. Therefore, according to Fleming's left-hand rule, The first electric actuator 6 generates a thrust force in the first direction X. Further, when a current is passed through the second coil 28, the magnetic force of the second magnet 22 acts in a direction perpendicular to the second coil 28. Therefore, according to Fleming's left hand rule, the second electric actuator 7 generates a thrust toward the second direction Y.

  In this case, in the first coil 27 (the same applies to the case of the second coil 28), there are two thrust generation portions 27a and 27b composed of straight portions where thrust is generated, and the current flows in the two locations. The reverse direction. However, since the direction of the magnetic force of the first magnet 21 acting on the two thrust generation units 27a and 27b is also opposite, the direction of the thrust generated by the two thrust generation units 27a and 27b is the same direction. It becomes. As a result, the sum of both thrusts becomes the thrust generated by the first electric actuator 6 and acts as a force for moving the moving frame 3 in the first direction X (second electric actuator). The same applies to 7).

  Further, as shown in FIG. 12A and the like, at a position where a line that coincides with the center F1 of the thrust generated by the first electric actuator 6 and a line that coincides with the center F2 of the thrust generated by the second electric actuator 7 intersect. An operation restriction mechanism 9 constituted by the restriction receiving part 16 and the restriction convex part 32 is arranged.

  In order to perform drive control of the correction lens 2, it is preferable to provide a position detector that detects the position of the correction lens 2. In the present embodiment, as shown in FIG. 9 and the like, two Hall elements 8A and 8B are provided as position detectors. The two Hall elements 8A and 8B detect the magnetic forces of the first magnet 21 and the second magnet 22, respectively, and calculate the position of the correction lens 2 based on the magnitude of the magnetic force. Yes.

  As shown in FIG. 9, the first Hall element 8 </ b> A is disposed in the gap of the winding portion of the first coil 27 and is mounted on the first coil mounting portion 29 a of the flexible wiring board 29. The central portion of the first Hall element 8A is set at the boundary between the N pole and the S pole of the first magnet 21A. The second Hall element 8 </ b> B is disposed in the gap of the winding portion of the second coil 28 and is mounted on the second coil mounting portion 29 b of the flexible wiring board 29. The central portion of the second Hall element 8B is set at the boundary between the N pole and the S pole of the second magnet 22A.

  The first and second Hall elements 8A and 8B detect the magnetic forces of the N and S poles of the magnets 21 and 22, and output detection signals corresponding to the strength of the magnetic forces. Then, based on the detection signals from the hall elements 8A and 8B, the control device calculates and calculates the positions of the correction lens 2 in the first direction X and the second direction Y. Thereby, the control device can perform drive control of the correction lens 2 with high accuracy.

  10A and 10B show the strength of the magnetic force received from the magnets 21 and 22 by the first and second Hall elements 8A and 8B crossing the polar boundaries of the first and second magnets 21 and 22, respectively. It is shown. Hereinafter, detection of the magnetic force of the first magnet 21 will be described by taking the first Hall element 8A as an example, but the strength of the magnetic force of the second magnet 22 is similarly detected in the second Hall element 8B. Is.

  As shown in FIG. 10A, the magnetic flux generated by the first magnet 21 and the first back yoke 23 is generated from the N pole 21a (the N pole 22a in the case of the second magnet 22) on the lower side of the first magnet 21. It jumps out and proceeds to the S pole 21b (S pole 22b in the case of the second magnet 22) on the lower side of the first magnet 21A. The magnetic flux does not travel in either direction on the boundary between the N pole 21a and the S pole 21b of the first magnet 21.

  The first Hall element 8A detects the magnetic flux density of the magnetic flux popping out from the N pole 21a of the first magnet 21 as a positive (+) value, and the magnetic flux density of the magnetic flux traveling to the S pole 21b of the first magnet 21 Is detected as a minus (−) value. Further, the first Hall element 8A detects the value of the magnetic flux density as 0 in a state in which the central portion faces the boundary between the N pole 21a and the S pole 21b.

  Now, when the moving frame 3 moves in the first direction X, the first Hall element 8A and the first magnet 21 move relatively. At this time, if the first Hall element 8A detects a plus (+) magnetic flux density, the first Hall element 8A has moved relatively to the N pole 21a side. Thus, the control device determines that the moving frame 3 has moved to the + side that is one of the first directions X as shown in FIG. 13 and calculates the moving distance based on the detected absolute value of the magnetic flux density. Further, when the first Hall element 8A detects a minus (−) magnetic flux density, the first Hall element 8A is relatively moved to the S pole 21b side. Accordingly, the control device determines that the moving frame 3 has moved to the negative side, which is the other of the first directions X as shown in FIG. 14, and calculates the moving distance based on the detected absolute value of the magnetic flux density.

  The image blur correction apparatus 1 having the above-described configuration can be assembled as follows, for example. First, the first and second back yokes 23 and 24 are respectively fixed to the first and second magnets 21 and 22 by a fixing method such as an adhesive. Next, the first and second magnets 21 and 22 to which the back yokes 23 and 24 are fixed are respectively attached to the first and second magnet fixing portions 13A and 13B of the moving frame 3 such as an adhesive and a fixing screw. Fix by fixing method.

  Subsequently, the correction lens 2 is fitted into the fitting hole 15 of the moving frame 3 to which the first and second magnets 21 and 22 are fixed, and is fixed by a fixing method such as an adhesive. Accordingly, a moving frame assembly in which the correction lens 2, the two magnets 21 and 22, the two back yokes 23 and 24, and the moving frame 3 are integrated as shown in FIG.

  Next, as shown in FIG. 7 and the like, the first and second coils 27 and 28 are mounted on the upper surfaces of the two coil mounting portions 29a and 29b of the flexible wiring board 29, respectively. Then, the first and second Hall elements 8A and 8B are mounted on the first and second coil mounting portions 29a and 29b exposed from the openings of the first and second coils 27 and 28, respectively. As a result, a coil assembly in which the flexible wiring board 29, the two coils 27 and 28, and the two Hall elements 8A and 8B are integrated is configured. Next, the coil assembly is fixed to the support frame 4. Thus, a support frame assembly in which the coil assembly and the support frame 4 are integrated is configured.

  Next, one end of three tension coil springs 5A, 5B, 5C is engaged with the three moving frame side claws 12A, 12B, 12C of the moving frame assembly, and the three support frame side claws 33A, The other ends of the three tension coil springs 5A, 5B, 5C are engaged with 33B, 33C. As a result, the movable frame assembly is urged to the support frame assembly via the three spherical protrusions 17 and is urged so as to be positioned at the approximate center of the support frame assembly. At this time, the restriction convex part 32 of the support frame 4 is inserted into the restriction receiving part 16 provided in the moving frame 3. Thereby, the moving frame assembly and the support frame assembly are integrated, and the image blur correction apparatus 1 is assembled.

  In a state in which the image blur correction device 1 is assembled, the moving frame 3 and the support frame 4 are brought into close contact via the three spherical protrusions 17 by the spring force of the three tension coil springs 5A, 5B, and 5C. Therefore, the moving frame 3 can move without causing backlash, the movement control of the correction lens 2 can be performed with extremely high accuracy, and deterioration of the optical characteristics can be minimized. Further, the three tension coil springs 5A, 5B, and 5C pull the moving frame 3 in three directions having an equiangular interval of about 120 degrees around the optical axis on a plane orthogonal to the optical axis of the correction lens 2. . Therefore, it is possible to prevent the moving frame 3 from rotating on a plane including the first direction X and the second direction Y, and the straightness of the moving frame 3 can be improved.

  The operation of the image blur correction apparatus 1 having such a configuration is, for example, as follows. The movement of the correction lens 2 of the image blur correction apparatus 1 selectively selects an appropriate value of drive current for the coils 27 and 28 of the first and second electric actuators 6 and 7 via the flexible wiring board 29. Or by supplying simultaneously.

  That is, the first coil 27 and the second coil 28 of the image blur correction device 1 are respectively fixed to the support frame 4 via the flexible wiring board 29. At this time, each thrust generating portion 27a, 27b of the first coil 27 extends in the second direction Y, and each thrust generating portion 28a, 28b of the second coil 28 extends in the first direction X. ing. Further, the first magnets 21 fixed to the moving frame 3 are respectively disposed above the first coils 27, and the second magnets 22 are respectively disposed above the second coils 28. As a result, the magnetic flux of the magnetic circuit formed by the first magnet 21 acts so as to pass through the thrust generating portions 27a and 27b of the first coil 27 in the vertical direction. Similarly, the magnetic flux of the magnetic circuit formed by the second magnet 22 acts so as to pass through the thrust generating portions 28a and 28b of the second coil 28 in the vertical direction.

  The coils 27 and 28 are fixed to the support frame 4, and the magnets 21 and 22 are fixed to the moving frame 3 movably supported by the support frame 4. Therefore, the correction lens 2 is within a predetermined range with respect to any direction on the plane including the first direction X and the second direction Y via the moving frame 3, that is, the restriction convex part 32 and the restriction receiving part. It is possible to move within a range limited by 16.

  Now, when a current is passed through the first coil 27 of the first electric actuator 6, the thrust generation portions 27a, 27b of the first coil 27 are extended in the second direction Y, and therefore each thrust generation A current flows in the second direction Y in the portions 27a and 27b. At this time, since the magnetic flux of the first magnet 21 acts in the vertical direction perpendicular to the thrust generating portions 27a and 27b, the first magnet 21 has the first direction X according to Fleming's law. The thrust toward is applied. Thereby, the moving frame 3 to which the first magnet 21 is fixed moves in the first direction X. As a result, the correction lens 2 held by the moving frame 3 moves in the first direction X according to the magnitude of the current passed through the first coil 27.

  Similarly, when a current is passed through the second coil 28 of the second electric actuator 7, each thrust generating portion 28a, 28b of the second coil 28 is extended in the first direction X, so that each thrust A current flows in the first direction X in the generators 28a and 28b. At this time, since the magnetic flux of the second magnet 22 acts in the vertical direction perpendicular to the thrust generating portions 28a and 28b, the second magnet 22 has the second direction Y according to Fleming's law. The thrust toward is applied. Thereby, the moving frame 3 to which the second magnet 22 is fixed moves in the second direction Y. As a result, the correction lens 2 held by the moving frame 3 moves in the second direction Y according to the magnitude of the current passed through the second coil 28.

  When a current is simultaneously supplied to the first coil 27 and the second coil 28, the above-described movement operation by the first coil 27 and the movement operation by the second coil 28 are executed in combination. That is, the correction lens 2 is moved in the first direction X by the action of the current flowing through the first coil 27, and at the same time, the correction lens 2 is moved in the second direction Y by the action of the current flowing through the second coil 28. . As a result, the correction lens 2 moves in an oblique direction and image blur is corrected.

  Next, setting of the reference position of the moving frame 3 using the mechanical end in the image blur correction apparatus 1 having the above-described configuration will be described with reference to FIGS. The reference position of the moving frame 3 using the mechanical end is set by determining the reference position for the first direction X and the reference position for the second direction Y of the moving frame 3.

  First, the setting of the reference position regarding the first direction X of the moving frame 3 will be described. In order to set the reference position of the moving frame 3 in the first direction X, as shown in FIGS. 13A and 13B, the moving frame 3 is moved to the + side of the first direction X, and the restriction receiving portion 16 is moved. Is brought into contact with the restricting convex portion 32. Thereby, the moving frame 3 stops moving to the + side in the first direction X. Then, the output of the first Hall element 8A at this time (hereinafter referred to as “X-direction mechanical end + output”) is detected. At this time, since the limit receiving portion 16 is brought into contact with the limit convex portion 32 on a line that coincides with the center F1 of thrust generated by the first electric actuator 6, the moving frame 3 rotates along the limit receiving portion 16. Can be prevented. As a result, the X-direction mechanical end + output can be accurately detected.

  Next, as shown in FIGS. 14A and 14B, the moving frame 3 is moved to the − side in the first direction X so that the limit receiving portion 16 is brought into contact with the limit convex portion 32. As a result, the moving frame 3 stops moving to the − side in the first direction X. Then, the output of the first Hall element 8A at this time (hereinafter referred to as “X-direction mechanical end-output”) is detected. In this case, the limit receiving portion 16 is brought into contact with the limit convex portion 32 on a line that coincides with the center F1 of the thrust generated by the first electric actuator 6. Therefore, it is possible to prevent the moving frame 3 from rotating along the restriction receiving portion 16 and to accurately detect the X-direction mechanical end-output. Thereafter, an intermediate output value is calculated from the X-direction mechanical end + output and the X-direction mechanical end−output, and the position where the output is detected is set as a reference position in the first direction X of the moving frame 3.

  Next, the setting of the reference position regarding the second direction Y of the moving frame 3 will be described. In order to set the reference position in the second direction Y of the moving frame 3, as shown in FIGS. 15A, 15B, 16A, and 16B, the moving frame 3 is moved to the + side and the − side in the second direction Y. And the restriction receiving part 16 is brought into contact with the restriction convex part 32. Also in this case, the limit receiving portion 16 is brought into contact with the limit convex portion 32 on a line that coincides with the center F2 of the thrust generated by the second electric actuator 7. Therefore, it is possible to prevent the moving frame 3 from rotating along the restriction receiving portion 16, and it is possible to accurately detect the Y-direction mechanical end + output and the Y-direction mechanical end-output. Thereafter, an intermediate output value is calculated from the Y-direction mechanical end + output and the Y-direction mechanical end−output, and the position where the output is detected is set as a reference position in the second direction Y of the moving frame 3. Then, as shown in FIGS. 12A to 12C, a position that is a reference position in the first direction X and is a reference position in the second direction Y of the moving frame 3 is set as a reference position of the moving frame 3.

  As described above, the image blur correction apparatus 1 according to the present invention moves the moving frame 3 in the first direction X and the second direction Y by the operation restriction mechanism 9 including the restriction receiving portion 16 and the restriction convex portion 32. Can be stopped and the moving frame 3 can be prevented from rotating at the stop position. Therefore, there is no fear that errors occur in the X-direction mechanical end + output, the X-direction mechanical end-output, the Y-direction mechanical end + output, and the Y-direction mechanical end-output. Accordingly, the moving frame 3 is moved in the first direction X and the second direction Y until the movement is restricted, and the moving frame 3 is based on the outputs of the first and second Hall elements 8A and 8B at that time. The reference position of the moving frame 3 can be accurately set by the apparatus alone. As a result, the position of the correction lens 2 fixed to the moving frame 3 can be accurately grasped, and highly accurate image blur correction can be performed.

  In the image blur correction device 1 according to the present invention, a line that coincides with the center F1 of the thrust generated by the first electric actuator 6 and a line that coincides with the center F2 of the thrust generated by the second electric actuator 7. The center of the restriction convex part 32 was made to correspond to the crossing position. Accordingly, the movement of the moving frame 3 in the first direction X and the second direction Y can be stopped by one operation restriction mechanism, and the moving frame 3 can be prevented from rotating at the position to be stopped. . As a result, the image blur correction device 1 that can accurately set the reference position of the moving frame 3 with a single device can be realized with a simple configuration.

  In this embodiment, the movement restricting portion 16 is provided on the moving frame 3 and the restricting convex portion is provided on the support frame 4 to configure the operation restricting mechanism. However, the operation restricting mechanism according to the present invention is limited to this. is not. As an operation restriction mechanism according to the present invention, an operation restriction mechanism can be configured by providing a restriction receiving portion on the support frame and providing a restriction convex portion on the moving frame.

  In this embodiment, the tension coil springs 5A, 5B, and 5C are applied as a specific example of the elastic member that urges the movable frame 3 toward the support frame 4, but the elastic member according to the present invention is not limited to this. It is not limited to. As the elastic member according to the present invention, for example, other springs such as a plate spring and a torsion spring can be used, and an elastic body such as rubber can be applied.

  FIG. 17 is a cross-sectional view illustrating an image blur correction apparatus 1A showing a second example of the image blur correction apparatus of the present invention. The image blur correction apparatus 1A includes a moving coil type electric actuator. In other words, the image blur correction apparatus 1A includes two magnets 21 and 22 and two coils 27 and 28 arranged in reverse in the image blur correction apparatus 1 showing the first embodiment described above, and a support frame. 4, two magnets 21 and 22 are provided, and two coils 27 and 28 are provided on the moving frame 3 (in FIG. 17, the first magnet 21 and the first coil 27 are shown). The two Hall elements 8A and 8B are arranged in the moving frame 3 in the same manner as the two coils 27 and 28. The other configuration is the same as that of the image blur correction apparatus 1 according to the first embodiment, and a duplicate description is omitted.

  Also in the image blur correction apparatus 1A having such a configuration, the movement limiting mechanism 9 stops the movement of the moving frame 3 in the first direction X and the second direction Y at a predetermined distance and stops the movement. It is possible to prevent the moving frame 3 from rotating at the position. As a result, the moving frame 3 is moved in the first direction X and the second direction Y until movement is restricted, and the moving frame 3 is based on the outputs of the first and second Hall elements 8A and 8B at that time. The reference position can be set accurately.

  FIG. 18 is a cross-sectional view illustrating an image blur correction apparatus 1B showing a second example of the image blur correction apparatus according to the present invention. This image blur correction device 1B has three spherical protrusions 17 and three guide receiving portions 34 arranged in reverse in the image blur correction device 1 showing the first embodiment described above, and is attached to the moving frame 3. Three guide receiving portions 34 are provided, and three spherical protrusions 17 are provided on the support frame 4. Also in the image blur correction apparatus 1B having such a configuration, the moving frame 3 is moved in the first direction X and the second direction Y until the movement is restricted, and the first and second Hall elements at that time are moved. The reference position of the moving frame 3 can be accurately set based on the outputs of 8A and 8B.

  FIGS. 19 to 21 show a first embodiment of the lens barrel of the present invention provided with the image blur correction device 1 having the configuration and operation as described above. The lens barrel 50 includes a lens system 51 having a five-group lens in which a plurality of lenses are arranged on one optical axis L, a cylindrical body 52 that supports the lens of the lens system 51 so as to be fixed or movable, and a lens. An image sensor (for example, a CCD or a CMOS) 54 disposed on the optical axis L of the system 51 and fixed to the cylindrical body 52, and an image that is attached to the cylindrical body 52 and corrects image blur of the lens system 51. It is configured to include a shake correction device 1 and the like.

  As shown in FIGS. 19, 20A, and 20B, the lens system 51 of the lens barrel 50 is configured as a foldable lens composed of five group lenses 57 to 61 in which five lens groups are arranged on the same optical axis L. ing. Among the fifth group lenses 57 to 61, the first group lens 57 located on the tip side is a first lens 57A which is an objective lens facing the subject, and a prism disposed on the opposite side of the objective lens 57A from the subject. 57B and a second lens 57C facing the prism 57B. The prism 57B is formed of a triangular prism whose cross-sectional shape is a right-angled isosceles triangle, and the objective lens 57A is opposed to one of two surfaces adjacent to a position displaced by 90 degrees, and the second lens 57C is disposed on the other surface. Opposed.

  In the first group lens 57, light that has passed through the objective lens 57A and entered the prism 57B from one surface is reflected by a reflecting surface inclined at 45 degrees with respect to the optical axis L, and the traveling direction is bent 90 degrees. Next, the bent light is emitted from the other surface and transmitted through the second lens 57C. The transmitted light travels along the optical axis L toward the second group lens 58. The second group lens 58 includes a combination of a third lens 58A and a fourth lens 58B, and is configured to be movable on the optical axis L. The light transmitted through the second group lens 58 is incident on the third group lens 59.

  The third group lens 59 includes a fifth lens fixed to the tube body 52 of the lens barrel 50. A fourth group lens 60 including a sixth lens is disposed behind the third group lens 59. A diaphragm mechanism 62 capable of adjusting the amount of light passing through the lens system 51 is disposed between the fourth group lens 60 and the third group lens 59. The fourth group lens 60 is configured to be movable on the optical axis L. A fifth group lens 61 composed of a seventh lens 61A and the correction lens 2 is disposed behind the fourth group lens 60. Of the fifth group lens 61, the seventh lens 61 </ b> A is fixed to the cylindrical body 52 of the lens barrel 50. In addition, the correction lens 2 is movably disposed behind the seventh lens 61A. Furthermore, an image sensor 54 is disposed behind the correction lens 2.

  The second group lens 58 and the fourth group lens 60 can be moved in the optical axis direction along the optical axis L independently of each other. Zoom adjustment and focus adjustment can be performed by moving the second group lens 58 and the fourth group lens 60 in a predetermined direction. That is, during zooming, zoom adjustment is performed by moving the second group lens 58 and the fourth group lens 60 from wide (wide angle) to tele (telephoto). At the time of focusing, focus adjustment can be performed by moving the fourth group lens 60 from wide (wide angle) to tele (telephoto).

  The image sensor 54 is fixed to the image sensor adapter, and is attached to the cylindrical body 52 of the lens barrel 50 via the image sensor adapter. An optical filter 64 is disposed on one side of the image sensor 54. An image blur correction device 1 having the correction lens 2 is disposed between the optical filter 64 and the seventh lens 61A.

  The correction lens 2 is attached so that its optical axis coincides with the optical axis L of the lens system 51 in a normal state. Then, when image blur occurs on the imaging surface of the image sensor 54 due to camera vibration or the like, the image blur correction apparatus 1 moves the correction lens 2 in two directions orthogonal to the optical axis L (first direction X and second direction). In this case, the image blur on the image plane is corrected.

  Next, the operation of the lens system 51 of the lens barrel 50 to which the image blur correction device 1 is mounted will be described with reference to FIG. When the objective lens 57A of the lens system 51 is directed toward the subject, light from the subject is input into the lens system 51 from the objective lens 57A. At this time, the light transmitted through the objective lens 57A is refracted by 90 degrees by the prism 57B. Thereafter, the refracted light moves toward the image sensor 54 along the optical axis L of the lens system 51. That is, the light reflected by the prism 57B and exiting the second lens 57C of the first group lens 57 passes through the second group lens 58, the third group lens 59, and the fourth group lens 60, and the seventh lens 61A of the fifth group lens 61. And the correction lens 2 is transmitted. Then, an image corresponding to the subject is formed on the imaging surface of the image sensor 54 through the optical filter 64.

  In this case, at the time of shooting, when there is no camera shake or vibration in the lens barrel 50, the light from the subject is the central part of each of the first group lens 57 to the fifth group lens 61, like the light 56A indicated by the solid line. Is moved along the optical axis L. Therefore, an image is formed at a predetermined position on the imaging plane of the image sensor 54. Therefore, in such a case, a beautiful image can be obtained without causing image blurring.

  On the other hand, when camera shake or vibration occurs in the lens barrel 50 during shooting, light from the subject is inclined to the first group lens 57 in a tilted state, such as light 56B indicated by a one-dot chain line or light 56C indicated by a broken line. Will be entered. Such incident lights 56B and 56C are transmitted in a state shifted from the optical axis L in each of the first group lens to the fifth group lens. However, the camera shake or the like can be corrected by moving the correction lens 2 by a predetermined amount in accordance with the camera shake or the like. As a result, an image can be formed at a predetermined position on the imaging plane of the image sensor 54, and a clear image can be obtained by eliminating image blur.

  The presence or absence of camera shake or vibration of the lens barrel 50 is detected by an image blur detector. As this image blur detector, for example, a gyro sensor can be used. This gyro sensor is mounted on the camera together with the lens barrel 50. The gyro sensor detects acceleration, angular velocity, angular acceleration, and the like that act on the lens barrel 50 due to shaking or shaking of the photographer's hand. Information such as acceleration and angular velocity detected by the gyro sensor is supplied to the control device.

  Then, the first electric actuator 6 and / or the second electric actuator 7 are driven and controlled so that an image is formed at a predetermined position on the imaging plane of the image sensor 54. That is, for the shaking in the first direction X, the first electric actuator 6 is driven and controlled, and the moving frame 3 is moved in the first direction X. Further, for the shaking in the second direction Y, the second electric actuator 7 is driven and controlled, and the moving frame 3 is moved in the second direction Y.

  In the present embodiment, the image blur correction device 1 is mounted on the lens barrel 50 configured as a bending lens. However, the image blur correction device 1 according to the present invention is a direct lens with the optical axis of the lens system oriented in the horizontal direction. It can also be mounted on a moving lens barrel. In this case, since the moving frame 3 of the image blur correction apparatus 1 is urged by the three tension coil springs 5A, 5B, and 5C, the moving frame 3 can be lifted and held in a direction against gravity. As a result, it is not always necessary to energize the electric actuator to generate a thrust force that lifts the moving frame 3, and the power consumption can be drastically reduced.

  22 to 25 show a digital still camera 100 showing a first embodiment of an image pickup apparatus including the lens barrel 50 having the above-described configuration. The digital still camera 100 uses a semiconductor recording medium as an information recording medium. The digital still camera 100 converts an optical image from a subject into an electrical signal using an imaging device (CCD, CMOS, etc.). As a result, the digital still camera 100 can record the imaging information obtained by the imaging device on a semiconductor recording medium or display it on a display device such as a liquid crystal display.

  The digital still camera 100 includes a camera main body 101 showing a specific example of the image pickup apparatus main body, a lens barrel 50 that takes an image of a subject as light and guides it to the image pickup element 54, and a video signal output from the image pickup element 54. The display device 102 includes a liquid crystal display or the like for displaying an image on the basis thereof, a control device for controlling the operation of the lens barrel 50, the display of the display device 102, and the like, and a battery power source (not shown).

  As shown in FIG. 22 and the like, the camera body 101 is composed of a flat cylindrical body that is horizontally long. The camera body 101 includes a front case 105 and a rear case 106 that are overlapped in the front-rear direction, a main frame 107 that partitions the space formed by the front case 105 and the rear case 106 in the front-rear direction, and the front surface of the front case 105 The lens cover 108 is attached to the first main surface that is slidable in the vertical direction. The objective lens 57 </ b> A of the lens barrel 50 faces the front surface (first main surface) of the main frame 107. The objective lens 57A can be opened and closed by a lens cover 108.

  The objective lens 57 </ b> A is disposed on the upper side of one side of the main frame 107. The lens barrel 50 is attached to the camera body 101 with the image sensor 54 facing down and the second optical axis L2 shown in FIG. Furthermore, the first optical axis L1 shown in FIG. 19 and the like of the lens system 51 extends in the front-rear direction, which is the thickness direction of the camera body 101. As a result, the first electric actuator 6 and the second electric actuator 7 which are the lens driving unit of the image blur correction apparatus 1 are arranged in the camera body 101 in a direction orthogonal to the second optical axis L2. . The main frame 107 is provided with a control device (not shown) formed by mounting a predetermined microcomputer, resistors, capacitors, and other electronic components on a wiring board, a flash device 110, and the like.

  The control device is disposed side by side with the lens barrel 50, and the flash device 110 is disposed above them. The flash device 110 includes a light emitting unit exposed on the front surface of the front case 105, a driving unit that drives and controls the light emitting unit, a capacitor that supplies predetermined power to the driving unit, and the like. In order to expose the light emitting portion of the flash device 110 and the objective lens 57A, a lens fitting hole 111a and a flash fitting hole 111b are provided at corresponding positions of the front case 105. The objective lens 57A is fitted together with the decorative plate 66 in the lens fitting hole 111a, and the light emitting part of the flash device 110 is fitted in the flash fitting hole 111b.

  Further, the front case 105 is provided with a plurality of opening holes (not shown) through which a plurality of leg pieces provided on the lens cover 108 are inserted. The lens cover 108 is prevented from falling off the front case 105 by providing a plurality of leg pieces with retaining portions. The lens cover 108 can be moved in the vertical direction by a plurality of opening holes, and can be locked at the upper end portion and the lower end portion by a locking means (not shown). As shown in FIG. 22, when the lens cover 108 is at the upper end, the objective lens 57A is completely closed. Thereby, the objective lens 57A is protected. On the other hand, as shown in FIG. 23, when the lens cover 108 is moved to the lower end, the objective lens 57A is completely opened and the power switch is turned on. Thereby, it is comprised so that imaging | photography is possible.

  As shown in FIG. 24, the rear case 106 is provided with a rectangular opening window 112 for exposing the display surface of the display device 102. The opening window 112 is provided with a large opening at the back, which is the second main surface of the rear case 106. Further, the display device 102 is disposed inside the opening window 112. The display device 102 includes a combination of a liquid crystal display having a size corresponding to the opening window 112 and a backlight superimposed on the inner surface of the liquid crystal display. A protective plate (not shown) is arranged on the liquid crystal display side of the display device 102 via a seal frame (not shown). The periphery of the protective plate is in contact with the inner surface of the opening window 112.

  Furthermore, the rear case 106 is provided with various operation switches. As operation switches, for example, a mode selection knob 115 for selecting a function mode (still image, moving image, reproduction, etc.), a zoom button 116 for executing a zoom operation, a screen display button 117 for displaying a screen, and a menu for selecting various menus. Examples include a button 118, a direction key 119 for moving a cursor for selecting a menu, a screen button 121 for switching a screen size and deleting a screen, and the like, which are arranged at appropriate positions. A speaker hole 122 is opened at the end of the rear case 106 on the display device 102 side. A speaker is built inside the speaker hole 122. A strap support fitting 123 is attached to the end of the rear case 106 on the opposite side.

  Further, as shown in FIG. 25 and the like, on the upper surface of the camera body 101, a power button 125 for turning on / off the power, a photographing button 126 for starting and stopping photographing, and an image blur correcting device when camera shake occurs. A camera shake setting button 127 for performing image blur correction by operating No. 1 is provided. Further, a microphone hole 128 is opened at a substantially central portion of the upper surface of the camera body 101, and a microphone is incorporated inside thereof. The power button 125, the shooting button 126, and the camera shake setting button 127 are attached to a switch holder 124 attached to the camera body 101. Further, a microphone hole 128 is also opened in the switch holder 124. A built-in microphone is fixed to the switch holder 124. The switch holder 124 is held by the camera body 101 so that a part of the switch holder 124 is sandwiched between the front case 105 and the rear case 106.

  FIG. 26 is a block diagram illustrating a control concept of the image blur correction apparatus 1 described above. The control unit 130 includes an image blur correction calculation unit 131, an analog servo unit 132, a drive circuit unit 133, four amplifiers (AMP) 134A, 134B, 135A, 135B, and the like. A first gyro sensor 136A is connected to the image blur correction calculation unit 131 via a first amplifier (AMP) 134A. Further, a second gyro sensor 136B is also connected to the image blur correction calculation unit 131 via a second amplifier (AMP) 134B.

  The first gyro sensor 136A detects the amount of displacement in the first direction X due to camera shake or the like added to the camera body 101, and the second gyro sensor 136B is the second due to camera shake or the like added to the camera body 101. The amount of displacement in the direction Y is detected. In this embodiment, an example has been described in which two gyro sensors are provided and the displacement amount in the first direction X and the displacement amount in the second direction Y are individually detected. However, the first gyro sensor is used for the first gyro sensor. Of course, the displacement amount in the two directions of the direction X and the second direction Y may be detected.

  An analog servo unit 132 is connected to the image blur correction calculation unit 131. The analog servo unit 132 converts the value calculated by the image blur correction calculation unit 131 from a digital value to an analog value, and outputs a control signal corresponding to the analog value. A drive circuit unit 133 is connected to the analog servo unit 132. A first Hall element 8A, which is a first position detector, is connected to the drive circuit unit 133 via a third amplifier (AMP) 135A. The drive circuit unit 133 is also connected to a second Hall element 8B, which is a second position detector, via a fourth amplifier (AMP) 135B. Furthermore, the first coil 27 of the first electric actuator 6 and the second coil 28 of the second electric actuator 7 are connected to the drive circuit unit 133, respectively.

  The displacement amount in the first direction X of the moving frame 3 detected by the first Hall element 8A is input to the drive circuit unit 133 via the third amplifier 135A. Further, the displacement amount in the second direction Y of the moving frame 3 detected by the second Hall element 8B is input to the drive circuit unit 133 via the fourth amplifier 135B. Based on these input signals and the control signal from the analog servo unit 132, the drive circuit unit 133 uses the first coil 27 and the second coil 28 to move the correction lens 2 so as to correct the image blur. A predetermined current is output to one or both.

  FIG. 27 is a block diagram illustrating a first example of a schematic configuration of a digital still camera 100 including the image blur correction apparatus 1 having the configuration and operation as described above. The digital still camera 100 includes a lens barrel 50 having an image blur correction device 1, a control unit 140 that plays a central role of a control device, a program memory, a data memory, and other RAMs for driving the control unit 140. A storage device 141 having a ROM and the like; an operation unit 142 for inputting various command signals for turning on / off the power, selecting a shooting mode, shooting, etc .; and a display device 102 for displaying shot images and the like And an external memory 143 for expanding the storage capacity.

  The control unit 140 includes, for example, an arithmetic circuit having a microcomputer (CPU). The control unit 140 includes a storage device 141, an operation unit 142, an analog signal processing unit 144, a digital signal processing unit 145, two A / D converters 146 and 147, and a D / A converter 148. A timing generator (TG) 149 is connected. The analog signal processing unit 144 is connected to the image sensor 54 attached to the lens barrel 50. Then, the analog signal processing unit 144 executes predetermined signal processing with an analog signal corresponding to the captured image output from the image sensor 54. The analog signal processing unit 144 is connected to the first A / D converter 146. The A / D converter 146 converts the analog signal into a digital signal.

  A digital signal processing unit 145 is connected to the first A / D converter 146. The digital signal processing unit 145 performs predetermined signal processing using the digital signal supplied from the first A / D converter 146. The digital signal processing unit 145 is connected to the display device 102 and the external memory 143. An image corresponding to the subject is displayed on the display device 102 or stored in the external memory 143 based on a digital signal that is an output signal of the digital signal processing unit 145. The second A / D converter 147 is connected to a gyro sensor 136 that is a shake detection unit. The gyro sensor 136 detects a shake or a shake of the camera body 101, and performs image blur correction according to the detection result.

  The D / A converter 148 is connected to a drive control unit 152 that is a servo calculation unit for image blur correction. The drive control unit 152 corrects image blur by driving and controlling the image blur correction apparatus 1 according to the position of the correction lens 2. A first Hall element 8A and a second Hall element 8B, which are position detection units, are connected to the drive control unit 152. The first Hall element 8 </ b> A and the second Hall element 8 </ b> B detect the position of the correction lens 2 by detecting the position of the moving frame 3 of the image blur correction apparatus 1. The timing generator (TG) 149 is connected to the image sensor 54.

  Thus, an image of the subject is input to the lens system 51 of the lens barrel 50 and is formed on the imaging surface of the image sensor 54. Then, the image signal is output as an analog signal, subjected to predetermined processing by the analog signal processing unit 144, and then converted into a digital signal by the first A / D converter 146. The output from the first A / D converter 146 is displayed on the display device 102 as an image corresponding to the subject after being subjected to predetermined processing by the digital signal processing unit 145, or stored as stored information in an external memory. Is done.

  In such a shooting state, assuming that the image blur correction apparatus 1 is in an operating state, when the camera body 101 is shaken or shaken, the gyro sensor 136 detects the shake or shake, and the detection signal is detected. Output to the controller 140. Upon receiving this detection signal, the control unit 140 executes a predetermined calculation process. Then, the control unit 140 outputs a control signal for controlling the operation of the image blur correction apparatus 1 to the drive control unit 152. The drive control unit 152 outputs a predetermined drive signal to the image blur correction device 1 based on the control signal from the control unit 140. In the image blur correction apparatus 1, the moving frame 3 is moved in the first direction X and / or the second direction Y by a predetermined amount. Thereby, the image blur is eliminated through the movement of the correction lens 2, and a beautiful image can be obtained.

  FIG. 28 is a block diagram showing a second example of a schematic configuration of a digital still camera including the image blur correction device 1 having the configuration and operation as described above. The digital still camera 100A includes a lens barrel 50 having an image blur correction device 1, a video recording / reproducing circuit unit 160 that plays a central role of a control device, and a program for driving the video recording / reproducing circuit unit 160. A built-in memory 161 having a memory, a data memory, and other RAMs and ROMs, a video signal processing unit 162 that processes captured images into predetermined signals, a display device 163 that displays captured images, and the like An external memory 164 that expands the capacity, a correction lens control unit 165 that drives and controls the image blur correction apparatus 1, and the like are provided.

  The video recording / reproducing circuit unit 160 includes, for example, an arithmetic circuit having a microcomputer (CPU). The video recording / reproducing circuit unit 160 includes a built-in memory 161, a video signal processing unit 162, a correction lens control unit 165, a monitor driving unit 166, an amplifier 167, three interfaces (I / F) 171, 172, 173 are connected. The video signal processing unit 162 is connected to the image sensor 54 attached to the lens barrel 50 via an amplifier 167. Then, a signal processed into a predetermined video signal is input to the video recording / reproducing circuit unit 160.

  The display device 163 is connected to the video recording / reproducing circuit unit 160 via the monitor driving unit 166. A connector 168 is connected to the first interface (I / F) 171. An external memory 164 can be detachably connected to the connector 168. A connection terminal 174 provided on the camera body 101 is connected to the second interface (I / F) 172.

  The correction lens control unit 165 is connected to an acceleration sensor 175 that is a shake detection unit via a third interface (I / F) 173. The acceleration sensor 175 detects a displacement caused by a shake or a shake added to the camera body 101 as an acceleration. The acceleration sensor 175 can be a gyro sensor. Connected to the correction lens control unit 165 are the first electric actuator 6 and the second electric actuator 7 which are lens driving units of the image blur correction apparatus 1 that drives and controls the correction lens 2. The correction lens control unit 165 is also connected with two Hall elements 8A and 8B which are position sensors for detecting the position of the correction lens 2.

  Thus, the image of the subject is input to the lens system 51 of the lens barrel 50 and formed on the imaging surface of the image sensor 54. Then, the image signal is input to the video signal processing unit 162 via the amplifier 167. A signal processed into a predetermined video signal by the video signal processing unit 162 is input to the video recording / reproducing circuit unit 160. Accordingly, a signal corresponding to the subject image is output from the video recording / reproducing circuit unit 160 to the monitor driving unit 166, the built-in memory 161, or the external memory 164. As a result, an image corresponding to the image of the subject is displayed on the display device 163 via the monitor driving unit 166, or recorded in the built-in memory 161 or the external memory 164 as an information signal if necessary.

  In such a shooting state, assuming that the image blur correction apparatus 1 is in an operating state and the camera body 101 is shaken or shaken, the acceleration sensor 175 detects the shake or shake. Then, the detection signal is output to the video recording / reproducing circuit unit 160 via the correction lens control unit 165. In response to this, the video recording / reproducing circuit unit 160 executes predetermined arithmetic processing. Then, the video recording / reproducing circuit unit 160 outputs a control signal for controlling the operation of the image blur correction apparatus 1 to the correction lens control unit 165. The correction lens control unit 165 outputs a predetermined drive signal to the image blur correction device 1 based on the control signal from the video recording / reproduction circuit unit 160. In the image blur correction apparatus 1, the moving frame 3 is moved in the first direction X and / or the second direction Y by a predetermined amount. Thereby, the image blur is eliminated through the movement of the correction lens 2, and a beautiful image can be obtained.

  As described above, according to the image blur correction device, the lens barrel, and the imaging device of the present invention, the movable frame that can move on the plane orthogonal to the optical axis of the correction lens is moved to a position where movement is restricted. When this is done, the moving frame can be prevented from rotating. Accordingly, the moving frame can be moved in the first direction and the second direction until the movement is restricted, and the reference position of the moving frame can be accurately set based on the output of the position detector at that time. As a result, the position of the correction lens fixed to the moving frame can be accurately grasped, and highly accurate image blur correction can be performed. In addition, since the reference position of the moving frame can be set with the image blur correction apparatus alone, the moving frame reference position can be set with simple equipment and processes, and a significant cost reduction can be realized.

  In addition, since the center of the restricting convex portion coincides with the position where the line that coincides with the center of the thrust generated by the first electric actuator and the line that coincides with the center of the thrust generated by the second electric actuator intersect, The limiting mechanism can be realized with a simple configuration. Furthermore, since the limiting convex portion is formed in a cylindrical shape and the limiting receiving portion is formed in a circular hole, the moving range of the moving frame can be set to the same distance over the entire 360 ° range. As a result, even if the moving frame is moved in any direction, the restricting convex portion can be brought into contact with the restricting receiving portion on the line that coincides with the center of the thrust acting on the moving frame, and the entire range for restricting the movement It is possible to prevent the moving frame from rotating. In addition, since the restriction receiving portion is provided so as to surround the fitting hole in which the correction lens is fitted, and the restriction convex portion that engages with the restriction receiving portion is provided to configure the operation restriction mechanism, the operation restriction mechanism It is not necessary to secure a large space, and the apparatus can be downsized.

  Further, since the support frame supports the movement frame so as to be movable on a plane including the first direction and the second direction via the movement guide, the apparatus itself can be reduced in size and the number of parts can be reduced. Can be reduced. Furthermore, the frictional resistance when the moving frame is moved can be made extremely small. As a result, the thrust generated by the first and second electric actuators can be reduced, and power consumption can be reduced.

  In addition, the moving frame is urged to the support frame side by the elastic member, and the moving frame and the support frame are brought into close contact with each other via the moving guide, so that there is no fear that the moving frame is rattled, and the movement control of the correction lens is performed with extremely high accuracy. In addition, the deterioration of optical characteristics can be minimized. Further, the elastic member includes three or more elastic bodies, and these three or more elastic bodies form an equiangular interval of approximately 120 degrees around the optical axis on a plane orthogonal to the optical axis of the correction lens. Pull the moving frame 3 in the direction. For this reason, it is possible to improve the straightness in the moving direction of the moving frame, and it is possible to realize extremely high-accuracy image blur correction.

  The present invention is not limited to the embodiment described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention. For example, in the above-described embodiment, an example in which a digital still camera is applied as an imaging device has been described. However, the present invention can also be applied to a digital video camera, a camera-equipped personal computer, a camera-equipped mobile phone, and other imaging devices. Furthermore, although the example using a 5 group lens as a lens barrel has been described, it may of course be a 4 group lens or less, and can be applied to a 6 group lens or more.

1 is a perspective view illustrating a first embodiment of an image blur correction device according to the present invention. FIG. 1 is a plan view showing a first example of an image blur correction apparatus according to the present invention. FIG. FIG. 3A is a front view showing a first example of the image blur correction apparatus of the present invention, and FIG. 3B is a right side view showing a first example of the image blur correction apparatus of the present invention. 4A is a cross-sectional view taken along line AA of the image blur correction apparatus shown in FIG. 2, and FIG. 4B is a cross-sectional view taken along line BB of the image blur correction apparatus shown in FIG. 1 is an exploded perspective view showing an exploded image blur correction apparatus according to a first embodiment of the present invention. It is explanatory drawing which looked at the state which decomposed | disassembled the 1st Example of the image blur correction apparatus of this invention from the front. 1 is an exploded perspective view in which a first embodiment of an image blur correction device of the present invention is disassembled into component parts. FIG. FIG. 8 is a perspective view illustrating the moving frame illustrated in FIG. 7, with a lower surface facing upward. It is explanatory drawing which shows arrangement | positioning of the two position detectors which concern on the 1st Example of the image blurring correction apparatus of this invention. FIG. 10A is a diagram illustrating a schematic configuration, and FIG. 10B is a diagram illustrating a schematic configuration, and FIG. 10B is a movement distance and magnetic flux density between the Hall element and the magnet. It is a graph which shows the relationship. FIG. 11A illustrates a moving guide and a guide receiving portion thereof according to the image blur correction device of the present invention. FIG. 11A is an explanatory view of a spherical protrusion having a spherical surface at the tip, which is a first embodiment of the moving guide, and FIG. FIG. 11C is an explanatory diagram of a sliding protrusion having a sliding surface at the tip, which is a second example of the movement guide, and FIG. 11C is sufficiently larger than the sphere and the diameter of the sphere as the third example of the movement guide. FIG. 11D is an explanatory view of a guide receiving portion formed of a circular concave portion having a diameter substantially the same as the diameter of the sphere and the spherical body. 12A is a plan view showing a state in which the moving frame is at the reference position, FIG. 12B is a cross-sectional view taken along the line BB shown in FIG. 12A, and FIG. 12C is a cross-sectional view taken along the line CC shown in FIG. FIG. 13A is a plan view, and FIG. 13B is a cross-sectional view taken along the line B-B, showing a state in which the moving frame has moved from the state of FIG. 12 to one (+) of the first direction. FIG. 14A shows a state in which the moving frame has moved from the state of FIG. 12 to the other (−) in the first direction, FIG. 14A is a plan view, and FIG. FIG. 15A is a plan view, and FIG. 15B is a cross-sectional view taken along the line CC, showing a state in which the moving frame has moved from the state of FIG. 12 to one (+) of the second direction. FIG. 16A shows a state where the moving frame has moved from the state of FIG. 12 to the other (−) in the second direction, FIG. 16A is a plan view, and FIG. FIG. 2 is a cross-sectional view of an image blur correction apparatus including a moving coil type electric actuator according to a second embodiment of the image blur correction apparatus of the present invention. FIG. 7 is a cross-sectional view of an image blur correction apparatus in which a third embodiment of the image blur correction apparatus of the present invention is described, and a spherical protrusion is provided on a support frame and a guide receiving part is provided on the support frame. It is a perspective view which shows the 1st Example of the lens-barrel of this invention. FIG. 20A is a front view and FIG. 20B is a left side view showing a first embodiment of the lens barrel of the present invention. It is explanatory drawing explaining the structure of the lens system which concerns on the 1st Example of the lens-barrel of this invention. FIG. 1 is a perspective view of a first embodiment of an imaging apparatus according to the present invention as viewed from the front side, with an objective lens closed with a lens cover. 1 is a perspective view of a first embodiment of an imaging apparatus according to the present invention as viewed from the front side in a state where a lens cover is opened and an objective lens is exposed. FIG. It is a rear view which shows the 1st Example of the imaging device of this invention. It is a top view which shows the 1st Example of the imaging device of this invention. It is a block diagram for demonstrating the control concept of the image blur correction apparatus of this invention. 1 is a block diagram illustrating a first example of a schematic configuration of an imaging apparatus of the present invention. It is a block diagram which shows the 2nd Example of schematic structure of the imaging device of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,1A, 1B ... Image blur correction apparatus, 2 ... Correction lens, 3 ... Moving frame, 4 ... Support frame, 5 ... Tension coil spring (elastic member), 6 ... 1st electric actuator, 7 ... 2nd electric drive Actuator, 8A ... 1st Hall element, 8B ... 2nd Hall element, 11 ... Lens fixing part, 12A, 12B, 12C ... Moving frame side claw part, 13A ... 1st magnet fixing part, 13B ... 2nd Magnet fixing part, 16 ... Limit receiving part, 17 ... Spherical protrusion (movement guide), 21 ... First magnet, 22 ... Second magnet, 27 ... First coil, 28 ... Second coil, 31 ... Through hole, 32 ... Restriction convex part, 33A, 33B, 33C ... Support frame side claw part, 34 ... Guide receiving part, 50 ... Lens barrel, 100 ... Digital still camera (imaging device), X ... First Direction, Y ... a second direction

Claims (10)

A correction lens that corrects image blur in the lens system;
A moving frame for holding the correction lens;
A support frame that movably supports the moving frame on a plane orthogonal to the optical axis of the correction lens via a moving guide;
An elastic member for biasing the moving frame toward the support frame;
A first electric actuator that generates a first thrust for moving the moving frame in a first direction orthogonal to the optical axis of the correction lens;
A second electric actuator that generates a second thrust that moves the moving frame in a second direction that is orthogonal to the optical axis of the correction lens and that is also orthogonal to the first direction;
A limiting protrusion provided on one of the moving frame and the support frame;
A restriction receiving portion provided on the other of the moving frame and the support frame and engaged with the restriction convex portion,
The restricting convex part and the restricting receiving part engage on an extension line of the center part of the first thrust to restrict the movement of the moving frame in the first direction, and the first thrust An image blur correction device that engages on an extension line of a central portion to restrict movement of the moving frame in the second direction.   The image blur correction apparatus according to claim 1, wherein the elastic member biases the moving frame toward the support frame such that a center of the correction lens coincides with an optical axis of the lens system.   The elastic member is composed of three or more elastic bodies arranged at equiangular intervals around the optical axis on a plane substantially orthogonal to the optical axis of the correction lens, and the three or more elastic bodies are the light The image blur correction apparatus according to claim 1, wherein the image blur correction apparatus is provided between the moving frame and the support frame so as to exert an elastic force in a radial direction about an axis.   4. The image blur correction device according to claim 3, wherein the three or more elastic bodies are tension coil springs.   2. The image blur correction device according to claim 1, wherein the movement receiving frame is provided with the restriction receiving portion including the restriction convex portion or the hole formed of a cylindrical portion concentric with the optical axis of the correction lens.   2. The image according to claim 1, wherein the movement guide is provided on one of the movement frame and the support frame, and is a spherical protrusion having a spherical surface that contacts the other of the movement frame and the support frame. Blur correction device.   The image blur correction apparatus according to claim 1, wherein the moving guide is a sphere that can freely roll between the moving frame and the support frame.   A first position detector that detects a position of the moving frame in the first direction, and a second position detector that detects a position of the moving frame in the second direction. The image blur correction apparatus according to claim 1. A cylinder containing the lens system;
An image blur correction device that includes a correction lens that corrects the optical axis of the lens system and moves the correction lens in a direction orthogonal to the optical axis of the lens system;
The image blur correction device includes:
A moving frame for holding the correction lens;
A support frame that movably supports the moving frame on a plane orthogonal to the optical axis of the correction lens via a moving guide;
An elastic member for biasing the moving frame toward the support frame;
A first electric actuator that generates a first thrust for moving the moving frame in a first direction orthogonal to the optical axis of the correction lens;
A second electric actuator that generates a second thrust that moves the moving frame in a second direction that is orthogonal to the optical axis of the correction lens and that is also orthogonal to the first direction;
A limiting protrusion provided on one of the moving frame and the support frame;
A limit receiving portion provided on the other of the moving frame and the support frame and engaged with the limit convex portion;
The restricting convex part and the restricting receiving part engage on an extension line of the center part of the first thrust to restrict the movement of the moving frame in the first direction, and the first thrust A lens barrel that engages on an extension line of a central portion to restrict movement of the moving frame in the second direction. In an imaging device that corrects image blur in a lens system,
A lens barrel having a cylindrical body in which the lens system is housed, and an image blur correction device that corrects image blur of the lens system by moving a correction lens in a direction orthogonal to the optical axis of the lens system;
An apparatus main body to which the lens barrel is attached,
The image blur correction device includes:
A moving frame for holding the correction lens;
A support frame that movably supports the moving frame on a plane orthogonal to the optical axis of the correction lens via a moving guide;
An elastic member for biasing the moving frame toward the support frame;
A first electric actuator that generates a first thrust for moving the moving frame in a first direction orthogonal to the optical axis of the correction lens;
A second electric actuator that generates a second thrust that moves the moving frame in a second direction that is orthogonal to the optical axis of the correction lens and that is also orthogonal to the first direction;
A limiting protrusion provided on one of the moving frame and the support frame;
A limit receiving portion provided on the other of the moving frame and the support frame and engaged with the limit convex portion;
The restricting convex part and the restricting receiving part engage on an extension line of the center part of the first thrust to restrict the movement of the moving frame in the first direction, and the first thrust An imaging apparatus that engages on an extension line of a central portion to restrict movement of the moving frame in the second direction.

Images