JP2007033668A - Image stabilizer, lens device, and imaging apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image stabilizer capable of smoothly moving a holding frame by eliminating play between a shaft and a bearing part and keeping the attitude of a correction lens constant. <P>SOLUTION: The correction lens 15 held by a first moving frame 51 can move in a first direction X and a second direction Y orthogonal to a lens optical axis by an actuator 54 having a first coil 88 and a second coil 91, and magnets 67a and 67b, which can move relatively, and is controlled so that its optical axis may be aligned with the lens optical axis, whereby image blur is corrected. One coil and one magnet are fixed on the first moving frame 51 and the others are fixed on a fixed base 53. The coils 88 and 91 are arranged so that their thrust turns to first and second directions respectively, and further a magnetic plate 86 attracted by magnetic force of the magnet is interposed between the coils 88 and 91 and the fixed base 53. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an image blur correction device that corrects image blur caused by vibration or the like during shooting, a lens device including the image blur correction device, and an imaging device such as a digital still camera and a video camera including the lens device. Is.

  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 the performance of such an imaging apparatus is largely due to the performance enhancement of the lens, CCD (solid-state imaging device), and image processing circuit.

  However, no matter how high the performance of lenses, CCDs, 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. It 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, since the conventional image blur correction device is relatively large, if it 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. Japanese Patent Application Laid-Open No. H10-228707 describes a vibration isolator that is disposed in a camera or the like that detects vibration at a relatively low frequency and uses this as information for preventing image blur. The anti-vibration device (hereinafter referred to as “first conventional example”) described in Patent Document 1 is “correction that is arranged in a lens barrel that holds a lens group and decenters the optical axis of the lens group. A camera comprising an optical mechanism, vibration detection means for detecting vibration applied to the lens barrel, and anti-vibration control means for driving the correction optical mechanism on the basis of a signal from the vibration detection means and performing anti-vibration In the vibration isolator, the correction optical mechanism holds the correction lens, a fixed frame for fixing the correction lens, and the fixed frame movably in a first direction different from the optical axis direction of the lens group. A first holding frame and a second holding frame fixed to the lens barrel that holds the first holding frame so as to be movable in a second direction different from the optical axis direction and the first direction. A holding frame and the first and second holding frames in the first and second directions, respectively. First and second driving means comprising first and second coils, first and second magnetic field generating members opposed to the first and second coils, the fixed frame, and the first First and second position detecting means for detecting the amount of movement of the holding frame in the first and second directions, and the first and second magnetic field generating members and the first and first position detecting means. At least one of the two position detection means is provided on a fixing member that is fixed to the lens barrel and that includes the second holding frame ”.

  According to the vibration isolator described in Patent Document 1 having such a configuration, “it becomes possible to respond to high-frequency vibration without increasing the cost or requiring a large space (the effect of the invention). The effect of “see column”) is expected.

  As another example of the conventional image blur correction device, for example, there is a device described in Patent Document 2. Patent Document 2 describes an image blur correction device used for an optical apparatus and a lens barrel using the image blur correction device. The image blur correction device described in Patent Document 2 (hereinafter referred to as “second conventional example”) “corrects image blur by moving a part of the photographing lens in a plane perpendicular to the optical axis. In the image blur correction device to be performed, a lens holding frame for holding a correction lens, first guide means for guiding the movement of the lens holding frame in a first direction within a plane perpendicular to the optical axis, and the lens Second guide means for guiding movement of the holding frame in a second direction perpendicular to the first direction, first driving means for driving the lens holding frame in the first direction, and second Second driving means for driving in the direction of the position and position detecting means for detecting the position of the correction lens, and the first guiding means and a part of the second driving means or the second guidance. And a part of the first driving means are arranged at positions overlapping each other when viewed from the optical axis direction. It is characterized in that.

According to the image blur correction apparatus described in Patent Document 2 having such a configuration, “a guide shaft for moving the correction lens and a coil or magnet for driving, a pitch moving unit, a yaw driving unit, Alternatively, by arranging the yaw moving means and the pitch driving means so as to overlap each other when viewed from the optical axis direction, the width and height of the correction device can be reduced (see paragraph [0032]). Be expected.
Japanese Patent Laid-Open No. 3-186823 JP 2000-258813 A

  However, in the first and second conventional examples, the holding frame having the correction lens is guided and supported so as to be movable in a first direction and a second direction orthogonal to each other. Each of them was constituted by a combination of a pair of shafts and a bearing portion that was paired in two sets. In this case, in order for the holding frame to move, a gap of an appropriate size is necessarily required between the shaft and the bearing portion, so that a backlash occurs during the movement, and the backlash makes smooth movement difficult. In addition, there is a problem that the position of the correction lens is not constant.

  The problem to be solved is that in the conventional image blur correction apparatus, the holding frames having the correction lenses are guided and supported by the support means composed of a combination of a shaft and a bearing portion, each of which is a pair of two. This is not only that the holding frame cannot be moved smoothly due to backlash generated between the shaft and the bearing portion, but also that the position of the correction lens is not constant.

  An image blur correction apparatus according to the present invention includes a driving unit having a coil and a magnet that are relatively movable, and a correction lens held in a moving frame by the driving unit is a first orthogonal to the optical axis of the lens system. Image blur by controlling the optical axis of the correction lens to be coincident with the optical axis of the lens system, and moving in the second direction perpendicular to the optical axis and the first direction. The image blur correction apparatus is configured to fix one of the coil and the magnet to the moving frame and the other to the support frame that movably supports the moving frame. A first coil that moves in the direction, a second coil that moves the correction lens in the second direction, and a magnet that applies magnetic force to the first coil and the second coil. The coil and the second coil are Arranged so that the thrust generation part of each coil faces the first direction and the second direction by the action of the magnetic force of the magnet, between the first coil and the second coil and the support frame or moving frame, The main feature is that a magnetic material attracted by the magnetic force of the magnet is interposed.

  The lens device according to the present invention includes a driving unit having a relatively movable coil and a magnet, and the correction lens held in the moving frame by the driving unit is in a first direction orthogonal to the optical axis of the lens system. Further, it is possible to move in a direction perpendicular to the first direction and also in the second direction perpendicular to the optical axis, and to correct the image blur by controlling the optical axis of the correction lens to coincide with the optical axis of the lens system. An image blur correction device that is capable of fixing one of a coil and a magnet to a moving frame and fixing the other to a support frame that movably supports the moving frame, The driving means applies a magnetic force to the first coil that moves the correction lens in the first direction, the second coil that moves the correction lens in the second direction, and the first coil and the second coil. And a magnet The first coil and the second coil are arranged so that the thrust generation part of each coil is directed in the first direction and the second direction by the action of the magnetic force of the magnet, and the first coil and the second coil. And a support frame or a moving frame, and a magnetic material attracted by the magnetic force of a magnet is interposed.

  The image pickup apparatus according to the present invention further includes a driving unit having a relatively movable coil and a magnet, and the correction lens held in the moving frame by the driving unit is a first orthogonal to the optical axis of the lens system. Image blur by controlling the optical axis of the correction lens to be coincident with the optical axis of the lens system, and moving in the second direction perpendicular to the optical axis and the first direction. An image pickup apparatus including a lens device having an image blur correction device capable of correcting the image, wherein the image blur correction device fixes one of the coil and the magnet to the moving frame and supports the other to move the moving frame. Fixed to the support frame, the driving means includes a first coil for moving the correction lens in the first direction, a second coil for moving the correction lens in the second direction, the first coil, and the second coil. Applying magnetic force to the coil The first coil and the second coil are arranged so that the thrust generation part of each coil is directed in the first direction and the second direction by the action of the magnetic force of the magnet, A magnetic material attracted by the magnetic force of a magnet is provided between the first and second coils and the support frame or the moving frame.

  According to the image blur correction device, the lens device, and the imaging device of the present invention, the magnetic body is provided between the first coil and the second coil and the support frame or the moving frame, and the magnetic body is magnetized by the magnetic force of the magnet. Since the correction lens is urged in a certain direction by sucking or pressing, it is possible to eliminate rattling caused by a gap generated between the shaft and the bearing portion, and thereby a moving frame that holds the correction lens. Can be moved smoothly, the correction lens can always be held in a constant posture, and deterioration of optical performance due to a change in the posture of the correction lens can be prevented.

  A magnetic material is interposed between the first coil and the second coil and the support frame or the moving frame, and the magnetic material is attracted or pressed by the magnetic force of the magnet to urge the correction lens in a certain direction. As a result, it is possible to eliminate rattling caused by a gap generated between the shaft and the bearing portion, and it is possible to smoothly move the moving frame that holds the correction lens, and it is possible to always maintain the position of the correction lens in a constant posture. An image blur correction device, a lens device, and an imaging device that can be realized are realized with a simple configuration.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 1 to 45 illustrate examples of embodiments of the present invention. 1 is a perspective view of the first embodiment of the lens apparatus of the present invention as seen from the front side, FIG. 2 is a perspective view as seen from the back side, FIG. 3 is a front view, FIG. 4 is a rear view, FIG. 5 is a left side view, FIG. 6 is a right side view, FIG. 7 is a plan view, FIG. 8 is a bottom view, FIG. 9 is a cross-sectional view taken along line MM in FIG. FIG. 11 is an exploded perspective view, and FIG. 12 is an explanatory diagram of the lens system. 13 is an exploded perspective view of a digital still camera showing a first example of the image pickup apparatus of the present invention, FIG. 14 is a perspective view of the digital still camera as seen from the front side, and FIG. 15 is a perspective view of the objective lens by moving the lens cover. 16 is a rear view, and FIG. 17 is a plan view.

  18 is a perspective view seen from the front side showing the first embodiment of the image blur correction device of the present invention, FIG. 19 is a perspective view seen from the back side, FIG. 20 is a plan view, FIG. 21 is a front view, 22 is a rear view, and FIG. 23 is an exploded perspective view. 24 is a perspective view showing a first moving frame, FIG. 25 is an exploded perspective view showing a coil assembly, a magnet and a yoke, FIG. 26 is a plan view of the coil assembly, etc. FIG. 27 is a front view, and FIG. FIG. 29 is a perspective view showing a third example of the coil assembly and the like, FIG. 30 is an exploded perspective view, and FIG. FIG. 32 is a block diagram illustrating a first embodiment of the schematic configuration of the imaging apparatus according to the present invention, and FIG. 33 is a schematic diagram of the schematic configuration of the imaging apparatus. It is a block diagram which shows the example of 2 implementation.

  34 to 45 are views for explaining the shape of the magnetic body and its attached state. That is, FIGS. 34 to 38 are applied to an image blur correction apparatus having a moving magnet type driving means in which one coil of the driving means is fixed and the other magnet is movable. 35 is an exploded perspective view, FIG. 35 is an external perspective view, FIG. 36 is a plan view, FIGS. 37A, B, and C are a front view, a rear view, a left side view, and FIGS. 38A, B, and C are right side views. FIG. 37 is a cross-sectional view taken along line -P and a cross-sectional view taken along line QQ in FIG. 39A and 39B show another embodiment of the coil support structure. FIG. 39A is a cross-sectional view taken along the line P-P in FIG. 36, and FIG. 39B is a view taken along the line Q-Q in FIG. FIG.

  40 to 45 are applied to an image blur correction apparatus having a moving coil type driving means in which one magnet of the driving means is fixed and the other coil is movable. Is an exploded perspective view, FIG. 41 is an external perspective view, FIG. 42 is a plan view, FIGS. 43A, B, and C are front views, rear views, left side views, FIGS. 44A, B, and C are right side views, and R in FIG. FIG. 43 is a cross-sectional view taken along line −R and a cross-sectional view taken along line SS in FIG. 42. 45A and 45B show another embodiment of the magnet support structure. FIG. 45A is a cross-sectional view taken along the line RR in FIG. 42, and FIG. FIG.

  As shown in FIGS. 1 to 11, a lens apparatus 1 showing a first embodiment of the lens apparatus of the present invention has a lens system 2 having a five-group lens in which a plurality of lenses are arranged on the same optical axis L. And a lens barrel 3 that supports the lens system 2 in a fixed or movable manner, and a specific example of an imaging unit that is disposed on the optical axis L of the lens system 2 and is fixed to the lens barrel 3 A CCD (solid-state imaging device) 4 indicating the above, an image blur correction device 5 that is mounted on the lens barrel 3 and corrects the image blur of the lens system 2 and the like.

  As shown in FIG. 12, the lens system 2 of the lens device 1 is configured as a folding lens composed of five group lenses 7 to 11 in which five lens groups are arranged on the same optical axis L. Among the fifth group lenses 7 to 11, the first group lens 7 positioned on the distal end side is a first lens 7 </ b> A that is an objective lens facing the subject, and a prism disposed on the opposite side of the subject to the subject of the objective lens 7 </ b> A. 7B and a second lens 7C facing the prism 7B. The prism 7B is formed of a triangular prism whose cross-sectional shape is a right-angled isosceles triangle, and the objective lens 7A is opposed to one of two surfaces adjacent to a position rotated and rotated 90 degrees, and the second lens 7C is disposed on the other surface. Opposed.

  In this first group lens 7, light that has passed through the objective lens 7A and entered the prism 7B 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. The light is emitted from the surface, passes through the second lens 7C, and travels along the optical axis L toward the second group lens 8. The second group lens 8 includes a combination of a third lens 8A and a fourth lens 8B, and is configured to be movable on the optical axis L. The light transmitted through the second group lens 8 is incident on the third group lens 9.

  The third group lens 9 includes a fifth lens fixed to the lens barrel 3. Behind the third group lens 9, a fourth group lens 10 comprising a sixth lens is disposed. Between the fourth group lens 10 and the third group lens 9, a diaphragm mechanism 12 capable of adjusting the amount of light passing through the lens system 2 is disposed. The fourth group lens 10 is configured to be movable on the optical axis L. Behind the fourth group lens 10 is a fifth group lens 11 including a seventh lens 11A and a correction lens 15 described later. Of the fifth group lens 11, the seventh lens 11 </ b> A is fixed to the lens barrel 3, and the correction lens 15 is movably disposed behind the seventh lens 11 </ b> A, and further behind the correction lens 15. A CCD 4 is arranged.

  The second group lens 8 and the fourth group lens 10 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 8 and the fourth group lens 10 in a predetermined direction. That is, during zooming, zoom adjustment is performed by moving the second group lens 8 and the fourth group lens 10 from wide (wide angle) to tele (telephoto). At the time of focusing, focus adjustment can be performed by moving the fourth group lens 10 from wide (wide angle) to tele (telephoto).

  The CCD 4 is fixed to a CCD adapter, and is attached to the lens barrel 3 via the CCD adapter. An optical filter 14 is disposed on the front side of the CCD 4, and an image blur correction device 5 having a correction lens 15 is disposed between the optical filter 14 and the seventh lens 11A. The image blur correction device 5 described in detail later is for correcting blur of a photographed image due to vibration of the lens system 2 or the like. The correction lens 15 is mounted so that its optical axis coincides with the optical axis L of the lens system 2 in a normal state. When image blurring occurs on the imaging surface of the CCD 4 due to vibration of the camera body, the image blur correction device 5 causes the correction lens 15 to move in two directions orthogonal to the optical axis L (first direction X and second direction). The image is moved in the direction Y) to correct image blur on the image plane.

  As shown in FIGS. 1 to 11, the lens barrel 3 that holds the lens system 2 having such a configuration includes an upper barrel 16, an intermediate barrel 17, and a lower barrel that are stacked and assembled in the vertical direction. The cylinder 18 is constituted. The upper lens barrel 16 is composed of a housing having an opening window 19 opened in the upper part of the front and an opening opened in the lower surface. The objective lens 7A of the first group lens 7 is attached to the opening window 19, and the objective lens 7A is attached to the upper barrel 16 by a decorative plate 21 attached to the front surface thereof. A prism 7B disposed on the back surface of the objective lens 7A via the light shielding plate 22 and a second lens 7C disposed on the lower surface of the prism 7B are fixed inside the upper lens barrel 16.

  A first moving holding frame 23 is supported inside the upper barrel 16 so as to be movable in the vertical direction parallel to the optical axis L of the lens system 2 extending in the vertical direction of the lens barrel 3. Yes. The first moving holding frame 23 is provided with a through hole penetrating in the vertical direction, and the second group lens 8 is fixed to the through hole. The first movement holding frame 23 is configured to be movable back and forth within a predetermined range in the optical axis L direction of the lens system 2 by a zoom drive mechanism 24 attached to the upper lens barrel 16.

  The zoom drive mechanism 24 includes a zoom motor 25, a feed screw shaft 26 provided as a rotation shaft of the zoom motor 25, a feed nut 27 engaged with the feed screw shaft 26, and the like. Yes. The zoom motor 25 is fixed to a first bracket 28 formed in a U-shape, and both ends of a feed screw shaft 26 protruding at one end thereof are supported by the first bracket 28 so as to be rotatable at both ends. ing. The first bracket 28 is attached to the upper barrel 16 by a plurality of (two in the present embodiment) fixing screws 29a, showing a specific example of the fixing means.

  In the mounted state of the first bracket 28, a feed nut 27 is slidably engaged with the feed screw shaft 26. The feed nut 27 is held by the first movement holding frame 23 in a state in which movement in the direction in which the thread groove extends is restricted. Further, two guide shafts 31a and 31b are slidably penetrated through the first movement holding frame 23 in a direction parallel to the optical axis L. One end of each of the guide shafts 31 a and 31 b is held by the upper barrel 16, and the other end is held by the intermediate barrel 17.

  Thus, when the zoom motor 25 is driven, the rotational force of the feed screw shaft 26 is transmitted to the first movement holding frame 23 via the feed nut 27. At this time, the feed nut 27 moves relatively in the axial direction with respect to the feed screw shaft 26 that is rotationally driven at a predetermined position. As a result, the first moving and holding frame 23 moves integrally with the feed nut 27, whereby the second group lens 8 approaches the first group lens 7 in accordance with the rotation direction of the zoom motor 25. And a direction approaching the third group lens 9 are selectively moved. At this time, the first moving holding frame 23 that holds the second group lens 8 is guided in the direction parallel to the optical axis L by the two guide shafts 31a and 31b, so that the optical axis L can be accurately detected. Can move.

  A diaphragm mechanism 12 disposed below the third lens group 9 fixedly held in the intermediate lens barrel 17 includes a blade member 32 whose opening area can be adjusted, and a blade presser plate that supports the blade member 32 so as to be movable. 33, a step motor 34 for opening and closing the blade member 32, and the like. The step motor 34 is fixed to the upper surface side portion of the intermediate lens barrel 17 via the motor base 35. An intermediate lens barrel 17 is overlaid on the lower lens barrel 18, and an upper lens barrel 16 is superimposed on the intermediate lens barrel 17. The lens barrel 3 is configured by being fastened and fixed by three) fixing screws 29b in the embodiment and integrally assembled.

  The lower barrel 18 is composed of a housing that is open to the upper surface, the side surface, and the lower surface, and the second movement holding frame 36 is movably movable in the vertical direction parallel to the optical axis L of the lens system 2. Is supported. The second movement holding frame 36 is provided with a through hole penetrating in the vertical direction, and the fourth group lens 10 is fixed to the through hole. The second moving and holding frame 36 is configured to be movable back and forth within a predetermined range in the optical axis L direction of the lens system 2 by a focus driving mechanism 37 attached to the lower barrel 18.

  The focus drive mechanism 37 includes a focus motor 38, a feed screw shaft 39 provided as a rotation shaft of the focus motor 38, a feed nut 41 engaged with the feed screw shaft 39, and the like. Yes. The focusing motor 38 is fixed to a second bracket 42 formed in a U-shape, and both ends of a feed screw shaft 39 protruding at one end thereof are supported at both ends by the second bracket 42 so as to be rotatable. ing. The second bracket 42 is attached to the lower barrel 18 by a plurality of (two in this embodiment) fixing screws 29c which are fixing means.

  In the mounted state of the second bracket 42, a feed nut 41 is slidably engaged with the feed screw shaft 39. The feed nut 41 is held by the second movement holding frame 36 in a state in which movement in the direction in which the thread groove extends is restricted. Further, two guide shafts 43 (only one is shown in FIG. 11) are slidably penetrated through the second movement holding frame 36 in a direction parallel to the optical axis L. One end of the two guide shafts 43 is held by the intermediate barrel 17, and the other end is held by the lower barrel 18.

  Thus, when the focus motor 38 is driven, the rotational force of the feed screw shaft 39 is transmitted to the second movement holding frame 36 via the feed nut 41. At this time, the feed nut 41 relatively moves in the axial direction with respect to the feed screw shaft 39 that is rotationally driven at a predetermined position. As a result, the second moving and holding frame 36 moves integrally with the feed nut 41, whereby the fourth group lens 10 approaches the third group lens 9 according to the rotation direction of the focusing motor 38. And a direction toward the fifth group lens 11 are selectively moved. At this time, since the second moving holding frame 36 that holds the fourth group lens 10 is guided in the direction parallel to the optical axis L by the two guide shafts 43, the second moving holding frame 36 moves on the optical axis L with high accuracy. be able to.

  The CCD 4 is attached to the lower surface of the lower barrel 18 via a CCD adapter 44. The CCD adapter 44 is formed of a plate having a square opening hole in the center, and the CCD 4 is integrally formed on one surface thereof by a fixing means such as an adhesive via a seal rubber 45 formed in a square frame shape. It is fixed to. On the other surface of the CCD adapter 44, a light shielding plate 46 on which the optical filter 14 is overlaid is disposed, and these are pressed and fixed by a filter pressing plate 47. The CCD adapter 44 is attached to the lower barrel 18 by fixing means such as a fixing screw with the optical filter 14 disposed inside.

  The image blur correction device 5 is detachably attached to the opening 48 opened on the side surface of the lower barrel 18. The image blur correction device 5 has a configuration as shown in FIGS. The image blur correction device 5 includes the correction lens 15 described above, a first moving frame 51 that supports the correction lens 15, and a first moving frame 51 that is orthogonal to the optical axis L of the lens system 2. A second moving frame 52 that is movably supported in the direction X, and the second moving frame 52 is moved in a direction orthogonal to the optical axis L and in a second direction Y that is also orthogonal to the first direction X. A fixed base 53 that can be supported, and an actuator 54 that shows a specific example of drive means for moving the first moving frame 51 in the first direction X and moving the second moving frame 52 in the second direction Y. And position detecting means (Hall elements) 94, 95 for detecting the position of the correction lens 15 and the like.

  The correction lens 15 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 a hand shake or shaking occurs in the camera body described later. This corrects image blur. As shown in FIG. 23, a step portion 15 a that is continuous in the circumferential direction on one surface side is provided on the outer peripheral edge of the correction lens 15. Further, on the outer peripheral edge of the correction lens 15, two width portions 15 b and 15 b are formed by providing notches at two locations corresponding to the diameter direction. The correction lens 15 is fixed to a first moving frame 51 that shows a first specific example of the moving frame.

  As shown in FIGS. 23 and 24, the first moving frame 51 includes a lens fixing portion 51a formed in a ring shape into which the correction lens 15 is fitted, and one side of the lens fixing portion 51a. It is formed of a yoke fixing portion 51b and the like that are bent in a crank shape and to which the yoke 66 is fixed. The lens fixing portion 51 a has a shape corresponding to the shape of the correction lens 15, and a step portion engaged with the step portion 15 a of the correction lens 15 is provided at the periphery of the fitting hole 58 in which the correction lens 15 is fitted. Is provided. Furthermore, the lens fixing portion 51a has two-surface width portions 51c and 51d corresponding to the two-surface width portion 15b of the correction lens 15, and the two-surface width portions 51c and 51d are opposed to each other (second direction). Yoke fixing portion 51b is continued on one side of a direction (first direction X) orthogonal to Y).

  A first main bearing portion 61 and a first auxiliary bearing portion 62 constituting the first bearing portion are provided outside the two-surface width portions 51c and 51d of the lens fixing portion 51a. The first main bearing portion 61 has two bearing pieces 61a and 61b provided at a predetermined interval in the first direction X, and both the bearing pieces 61a and 61b have a first main guide shaft. 63 is penetrated in the first direction X. The first main guide shaft 63 is press-fitted and fixed to both the bearing pieces 61a and 61b, and both end portions thereof protrude outward from the bearing pieces 61a and 61b. The first sub-bearing portion 62 is provided with a bearing groove 64 opened to the side. A first sub guide shaft 65 is slidably engaged with the bearing groove 64.

  Further, a yoke 66 constituting a part of the actuator 54 is fixed to the yoke fixing portion 51b of the first moving frame 51 by fixing means such as an adhesive or a fixing screw. As shown in FIG. 25, the yoke 66 includes an upper piece 66a and a lower piece 66b facing each other in parallel with a predetermined interval, and a connecting piece 66c for connecting the upper and lower pieces 66a and 66b. The connecting piece 66c is provided on one side in the longitudinal direction of both the upper and lower pieces 66a and 66b, so that a part of the yoke fixing portion 51b of the first moving frame 51 is inserted into the side of the connecting piece 66c. The notch 66d is formed.

  The notch 66d of the yoke 66 is provided for the purpose of bringing a coil assembly 93, which will be described later, closer to the auxiliary lens 15, and the actuator 54 can be further downsized by the notch 66d. On the inner surfaces of the upper piece 66a and the lower piece 66b of the yoke 66, flat magnets 67a and 67b having a rectangular shape having approximately the same size as these are fixed by a fixing means such as an adhesive. The two magnets 67a and 67b and the yoke 66 opposed to each other in the vertical direction constitute a magnetic circuit for the actuator 54. That is, a set of magnetic circuit members including one yoke 66 and two magnets 67a and 67b serves as both a magnetic circuit for the first driving means and a magnetic circuit for the second driving means. .

  As shown in FIG. 23, the second moving frame 52 is a flat plate that is slightly wider than the first moving frame 51. The second moving frame 52 is assembled to face each other so as to overlap the first moving frame 51. A through hole 68 having the same size is provided at a position corresponding to the fitting hole 58 of the first moving frame 51 of the second moving frame 52. On the upper surface of the second moving frame 52, a second bearing portion for supporting the first moving frame 51 so as to be slidable in the first direction X is provided. The second moving frame 52 functions as a support frame for the first moving frame 51, but constitutes a second specific example of the moving frame for the fixed base 53.

  The second bearing portion fixedly supports the second main bearing portion 71 slidably supporting the first main guide shaft 63 fixed to the first moving frame 51 and the first sub guide shaft 65. And a second sub-bearing portion 72. The second main bearing portion 71 is provided at a position where both end portions of the first main guide shaft 63 can be supported in a state where the first moving frame 51 is superimposed on the second moving frame 52. That is, the second main bearing portion 71 includes two bearing pieces 71 a and 71 b that support both end portions of the first main guide shaft 63, and is provided so as to protrude upward from the upper surface of the second moving frame 52. It has been.

  The two bearing pieces 71 a and 71 b of the second main bearing portion 71 are configured so that the first moving frame 51 moves in the first direction X to the length of the first main bearing portion 61 in the first direction X. Are formed apart by a distance obtained by adding a necessary length. The two bearing pieces 71a and 71b are respectively provided with bearing holes, and both end portions of the first main guide shaft 63 are slidably inserted into these bearing holes.

  Further, the second auxiliary bearing portion 72 is provided at a position corresponding to the first auxiliary bearing portion 62 in a state where the first moving frame 51 is superimposed on the second moving frame 52. That is, the second sub-bearing portion 72 includes two bearing pieces 72 a and 72 b that support both end portions of the first sub-guide shaft 65. The two bearing pieces 72a and 72b are respectively provided with bearing holes, and both end portions of the first sub guide shaft 65 are press-fitted and fixed to the bearing holes, respectively. The first sub guide shaft 65 is slidably inserted into a bearing groove 64 provided in the first sub bearing portion 62 of the first moving frame 51. The first sub-guide shaft 65 and the first main guide shaft 63 are set so that their axis lines are parallel to each other, and are guided by the guide shafts 63 and 65 so that the first moving frame. 51 is configured to be movable in the first direction X.

  The lower surface of the second moving frame 52 is provided with a third bearing portion for slidably supporting the second moving frame 52 in a second direction Y orthogonal to the first direction X. . The third bearing portion includes a third main bearing portion 75 and a third auxiliary bearing portion 76. The third main bearing portion 75 is one end portion in the first direction X of the second moving frame 52, and includes two bearing pieces 75 a and 75 b provided at a predetermined interval in the second direction Y. And provided on the lower surface of the second moving frame 52 so as to protrude downward. The two bearing pieces 75a and 75b are respectively provided with bearing holes, and both end portions of the second main guide shaft 77 extending in the second direction Y are slidable in the bearing holes. It is inserted.

  Further, the third auxiliary bearing portion 76 is provided at a substantially central portion of the other end portion in the first direction X of the second moving frame 52. The third auxiliary bearing portion 76 is provided with a bearing groove 78 opened to the side. A second sub guide shaft 79 extending in a second direction Y orthogonal to the first direction X is slidably engaged with the bearing groove 78. The second main guide shaft 77 and the second sub guide shaft 79 are each fixed to the fixed base 53. The second moving frame 52 is assembled so as to oppose each other on the fixed base 53.

  The fixed base 53 has a function as a support frame with respect to the second moving frame 52. As shown in FIG. 23, the fixed base 53 includes a moving frame support 53a having a size corresponding to the second moving frame 52, and a coil fixing provided integrally and continuously with the moving frame support 53a. The unit 53b and the like are included. The moving frame support 53a is formed of a flat plate having substantially the same size as the second moving frame 52, and a coil fixing portion 53b is connected to one end of the moving frame support 53a in the first direction X. Yes. A through hole 81 having the same size is provided at a position corresponding to the through hole 68 of the second moving frame 52 of the moving frame support 53a. A fourth moving frame 52 is slidably supported in the second direction Y via the second guide shaft at both ends of the upper surface of the moving frame support 53a in the first direction X. A bearing portion is provided.

  The fourth bearing portion includes a fourth main bearing portion 82 disposed in one of the first directions X and a fourth sub bearing portion 83 disposed in the other of the first directions X. . The fourth main bearing portion 82 includes two bearing pieces 82a and 82b provided at an appropriate interval in the second direction Y, and is provided so as to protrude upward on the upper surface of the moving frame support portion 53a. Yes. The two bearing pieces 82a and 82b are provided with bearing holes, respectively, and two axial middle portions of the second main guide shaft 77 are press-fitted and fixed to the bearing holes, respectively. Accordingly, both end portions of the second main guide shaft 77 protrude outward from the two bearing pieces 82a and 82b.

  Two bearing pieces 75a and 75b of the third main bearing portion 75 provided on the second moving frame 52 are slidably fitted to the protruding portions at both ends of the second main guide shaft 77, respectively. The interval between the two bearing pieces 75a and 75b is separated by a distance obtained by adding the length necessary for the second moving frame 52 to move in the second direction Y to the length of the two bearing pieces 82a and 82b. Is formed. Accordingly, the third main bearing portion 75 of the second moving frame 52 has two bearing pieces 82a and 82b with respect to the second main guide shaft 77 fixed to the fourth main bearing portion 82 of the fixed base 53. Each is supported so as to be movable on the outside.

  The fourth sub-bearing portion 83 includes two bearing pieces 83a and 83b provided at an appropriate interval in the second direction Y, and is provided so as to protrude upward on the upper surface of the moving frame support portion 53a. It has been. The two bearing pieces 83a and 83b are respectively provided with bearing holes. The second sub guide shafts 79 are press-fitted into the bearing holes, fixed at both ends in the axial direction, and supported at both ends. Yes. Between the two bearing pieces 83a and 83b, the bearing groove 78 of the third auxiliary bearing portion 76 provided in the second moving frame 52 is slidably engaged with the second auxiliary guide shaft 79. Accordingly, the third auxiliary bearing portion 76 is guided by the second auxiliary guide shaft 79 between the two bearing pieces 83a and 83b, and is movable in the second direction Y by a predetermined distance.

  The coil fixing portion 53b of the fixed base 53 is formed of a substantially rectangular flat portion having a support wall 84 protruding upward, and the support wall 84 is disposed on one side in the second direction Y. A coil support base 85 is fixed to the coil fixing portion 53b, and a coil assembly 93 is attached to the coil support base 85. As shown in FIG. 25, the coil support base 85 is provided to hold the coil assembly 93 at a predetermined height, and is formed as a frame having a U-shaped planar shape. The coil support base 85 is placed on the coil fixing portion 53b so as to be along the support wall 84, and is integrally fixed to the fixing base 53 by fixing means such as an adhesive or a fixing screw. On the lower surface of the fixed base 53, an attachment boss portion 53c for fixing it to the lens barrel 3 is provided.

  The upper surface of the coil support base 85 is formed as a flat surface, and a magnetic plate 86 formed as a thin plate with a magnetic material is placed on the upper surface. The action and the like of the magnetic plate 86 will be described in detail later. The magnetic plate 86 is attracted by the magnetic force of the magnets 67a and 67b, thereby causing the first moving frame 51, the second moving frame 52, and the second movement. The frame 52 and the fixed base 53 are relatively attracted to each other, and the backlash generated between the first moving frame 51 and the second mobile frame 52 and the backlash generated between the second moving frame 52 and the fixed base 53 are displayed. However, it also has a role of reinforcing the strength of the flexible wiring board 87. As the material of the magnetic plate 86, various materials can be used as long as they are magnetizable materials such as iron, nickel, cobalt, alloys thereof, and the like.

  In order to position the magnetic plate 86, two positioning projections 85a and 85a are provided on the upper surface of the coil support base 85. The two positioning projections 85a and 85a are arranged at a predetermined interval in the second direction Y, and the magnetic plate 86 positioned by both positioning projections 85a and 85a is made of an adhesive or the like on the upper surface of the coil support base 85. It is fixed by fixing means. On the lower surface of the magnetic plate 86, a flexible wiring board 87 having a predetermined electric circuit printed and formed on the upper surface and the lower surface is fixed by an adhering means such as an adhesive tape.

  A flat coil 88 wound in a plane is mounted on the top surface of the magnetic plate 86 and is electrically connected to a predetermined wiring pattern provided on the top surface of the flexible wiring board 87. As shown in FIG. 25 and the like, the flat coil 88 has a shape in which two coil portions 88a and 88b having an elliptical shape are arranged side by side. The two coil portions 88a and 88b have substantially the same length in the width direction, but are formed to have different lengths in the longitudinal direction. The reason why the lengths of the two coil portions 88a and 88b are made different is that the connecting piece 66c of the yoke 66 can be disposed outside the coil portion 88b having a short length, whereby the area on the plane side of the flat coil 88 is reduced. This is because the actuator 54 is made close to the correction lens 15 while ensuring a large size so that the overall size of the actuator 54 can be reduced.

  The two coil portions 88a and 88b are formed by winding one coil wire, and are the same when energized in the thrust generation portions 89a and 89b that extend straight on the long sides adjacent to each other in the width direction. The winding direction is set so that current flows in the direction. In the flat coil 88, the coil portions 88a and 88b are fixed to the magnetic body 86 by an adhering means using an adhesive with the longitudinal direction of the two coil portions 88a and 88b facing the second direction Y. Accordingly, when a current is passed through the two coil portions 88a and 88b, the magnetic force by the magnets 67a and 67b acts in a direction perpendicular to the flat coil 88. Therefore, according to Fleming's left-hand rule, the first direction X Force toward the magnets 67a and 67b.

  A cylindrical coil 91 is attached to the lower surface of the flexible wiring board 87, and both ends of the cylindrical coil 91 are electrically connected to a predetermined wiring pattern provided on the lower surface of the flexible wiring board 87. As shown in FIG. 25 and the like, the cylindrical coil 91 is provided with a rectangular space at the center so as to form a rectangular cylinder as a whole, and is wound by a predetermined amount so as to have a predetermined thickness in the stacking direction. Is formed in a rectangular tube shape. In this cylindrical coil 91, the thrust generating portion 92 is fixed to the flexible wiring board 87 by a fixing means using an adhesive in a state in which the extending direction of the coil wire is directed to the first direction X.

  A lower piece 66b of the yoke 66 and a lower magnet 67b fixed integrally therewith are inserted into the central space of the cylindrical coil 91. As a result, when a current is passed through the cylindrical coil 91, the magnetic force of the magnets 67a and 67b acts in a direction perpendicular to the thrust generating portion 92, so that the direction toward the second direction Y follows Fleming's left-hand rule. The force acts on the magnets 67a and 67b side. A coil assembly 93 is constituted by the magnetic plate 86, the flexible wiring board 87, the flat coil 88, and the cylindrical coil 91.

  26 and 27 show the actuator 54 constituted by the coil assembly 93, the yoke 66, and the two magnets 67a and 67b described above. Of the actuator 54, the yoke 66, the two magnets 67 a and 67 b, and the flat coil 88 constitute first driving means for moving the correction lens 15 in the first direction X via the first moving frame 51. ing. Then, the first main bearing portion 61 and the first sub bearing portion 62, the first main guide shaft 63, the first sub guide shaft 65, the second main bearing portion 71 and the first main bearing portion 61 of the first moving frame 51. The second auxiliary bearing portion 72 constitutes first guide means for guiding the correction lens 15 in a first direction X orthogonal to the optical axis L of the lens device 1 via the first moving frame 51.

  Further, the yoke 66, the two magnets 67a and 67b, and the cylindrical coil 91 constitute second driving means for moving the correction lens 15 in the second direction Y via the second moving frame 52. Then, the third main bearing portion 75 and the third sub bearing portion 76, the second main guide shaft 77, the second sub guide shaft 79, the fourth main bearing portion 82 and the second main bearing portion 82 of the second moving frame 52. The auxiliary lens 83 guides the correction lens 15 through the second moving frame 52 in a second direction Y that is perpendicular to the optical axis L of the lens device 1 and also perpendicular to the first direction X. The second guide means is configured.

  Thus, in this embodiment, the magnetic circuit for the first driving means and the magnetic for the second driving means are formed by a set of magnetic circuit members including one yoke 66 and two magnets 67a and 67b. The circuit is also used. Therefore, since it is not necessary to provide a magnetic circuit member for each driving means, the number of parts can be reduced correspondingly, and the structure can be simplified, and the entire apparatus can be reduced in size.

  Further, as shown in FIG. 27, a magnetic plate 86 is interposed between two magnets 67a and 67b disposed to face the inner surfaces of the upper piece 66a and the lower piece 66b of the yoke 66, and the magnetic plate 86 Since the first coil 88 and the second coil 91 are fixed to the upper surface and the lower surface, a difference is provided in the gap between the two magnets 67a and 67b and the magnetic plate 86, and an unbalance of the attractive force is used to obtain the magnetic plate. By attracting 86 to the magnet 67a on the side with the smaller gap, rattling occurs between the first moving frame 51 and the second moving frame 52, and between the second moving frame 52 and the fixed base 53. It is possible to eliminate the rattling that occurs. As a result, the relative movement between the first moving frame 51 and the second moving frame 52 and the relative movement between the second moving frame 52 and the fixed base 53 are each rattled. Therefore, the movement control of the correction lens 15 can be performed very accurately and smoothly.

  That is, the first moving frame 51 and the second moving frame 52 are connected by the first bearing portion and the second bearing portion so as to be movable and fixed to the second moving frame 52. The base 53 is connected by a third bearing portion and a fourth bearing portion and is movably supported. These first to fourth bearing parts are each composed of a shaft body and its bearing part, and in order to ensure slidability between them, there is always a gap between the shaft body and the bearing part. A gap (backlash) is required. Therefore, there is a problem that the gap is inevitably generated by the gap, and there is a problem that the movement control of the correction lens 15 cannot be accurately performed. The present invention can solve such problems.

  Further, as shown in FIG. 25, on the lower surface of the flexible wiring board 87, a first hall element 94 showing one specific example of the first position detecting means and a first example showing one specific example of the second position detecting means. Two Hall elements 95 and a thermistor 96 showing a specific example of the temperature detecting means are respectively attached. The first Hall element 94 detects the position of the correction lens 15 in the first direction X via the first moving frame 51. The second Hall element 95 detects the position of the correction lens 15 in the second direction Y via the second moving frame 52. The first Hall element 94 is disposed on one side of the cylindrical coil 91, and the second Hall element 95 is disposed on the other side of the cylindrical coil 91.

  The first Hall element 94 and the second Hall element 95 detect the strength of the magnetic force of the lower magnet 67b at a predetermined position, and output a detection signal corresponding to the strength of the magnetic force. Based on the detection signals from the two Hall elements 94 and 95, the control device calculates and calculates the position of the correction lens 15. The thermistor 96 detects the ambient temperature of the coil assembly 93 and applies temperature correction to image blur correction due to camera shake or vibration when the ambient temperature rises above a predetermined value.

  The image blur correction device 5 having the above-described configuration is assembled as follows, for example. First, as shown in FIGS. 25 to 27, the flat coil 88 is fixed to one surface of the magnetic plate 86 and the flexible wiring board 87 is fixed to the opposite surface. Next, the cylindrical coil 91 is fixed to the lower surface of the flexible wiring board 87. Thereby, the coil assembly 93 in which the magnetic plate 86, the flexible wiring board 87, and the two coils 88 and 91 are integrated is configured.

  The lower piece 66b of the yoke 66 is inserted into the hole of the cylindrical coil 91 of the coil assembly 93 from the side, and the lower magnet 67b fixed to the inner surface of the lower piece 66b is used as the thrust generating portion 92 of the cylindrical coil 91. Make them face each other. At the same time, the upper magnet 67 a is opposed to the upper surface of the flat coil 88. Thus, the magnetic plate 86, the thrust generating portions 89a and 89b of the flat coil 88, and the thrust generating portion 92 of the cylindrical coil 91 are sandwiched by the upper and lower magnets 67a and 67b, and the actuator 54 is configured. The magnetic plate 86 of the actuator 54 is placed on the upper surface of the coil support base 85 and positioned by the two positioning projections 85a and 85a. Then, the magnetic plate 86 is fixed to the coil support base 85 by fixing means such as an adhesive.

  Next, the second moving frame 52 faces the moving frame support portion 53a of the fixed base 53, and the fourth main bearing portion 82 is interposed between the two bearing pieces 75a and 75b of the third main bearing portion 75. Two bearing pieces 82a and 82b are interposed. Then, the third auxiliary bearing portion 76 is interposed between the two bearing pieces 83 a and 83 b of the fourth auxiliary bearing portion 83. Next, the second main guide shaft 77 is passed through the bearing holes of the four bearing pieces 75a, 75b, 82a, 82b of the third main bearing portion 75 and the fourth main bearing portion 82. At this time, the second main guide shaft 77 is configured to be slidable with respect to the third main bearing portion 75 while being press-fitted and fixed to the fourth main bearing portion 82.

  Further, the second sub guide shaft 79 is passed through the bearing holes of the two bearing pieces 83 a and 83 b of the fourth sub bearing portion 83 and the bearing groove 78 of the third sub bearing portion 76. At this time, the second auxiliary guide shaft 79 is configured to be slidable with respect to the third auxiliary bearing portion 76 while being press-fitted and fixed to the fourth auxiliary bearing portion 83. As a result, the second moving frame 52 moves from the fixed base 53 in the second direction Y by a predetermined distance, that is, from the distance between the inner surfaces of the two bearing pieces 75a and 75b of the third main bearing portion 75. The four main bearing portions 82 are movable by a length obtained by subtracting the distance between the outer surfaces of the two bearing pieces 82a and 82b.

  Next, the lens fixing portion 51 a of the first moving frame 51 is faced on the second moving frame 52, and the two bearing pieces 61 a and 61 b of the first main bearing portion 61 are moved to the second main bearing portion 71. Between the two bearing pieces 71a and 71b. The first auxiliary bearing portion 62 is interposed between the two bearing pieces 72 a and 72 b of the second auxiliary bearing portion 72. Next, the first main guide shaft 63 is passed through the bearing holes of the four bearing pieces 61 a, 61 b, 71 a, 71 b of the first main bearing portion 61 and the second main bearing portion 71. At this time, the first main guide shaft 63 is configured to be slidable with respect to the second main bearing portion 71 while being press-fitted and fixed to the first main bearing portion 61.

  Further, the first sub guide shaft 65 is passed through the bearing holes of the two bearing pieces 72 a and 72 b of the second sub bearing portion 72 and the bearing groove 64 of the first sub bearing portion 62. At this time, the first sub-guide shaft 65 is configured to be slidable with respect to the first sub-bearing portion 62 while being press-fitted and fixed to the second sub-bearing portion 72. Thereby, the first moving frame 51 is a predetermined distance in the first direction X with respect to the second moving frame 52, that is, between the inner surfaces of the two bearing pieces 71a and 71b of the second main bearing portion 71. The distance is movable by a length obtained by subtracting the distance between the outer surfaces of the two bearing pieces 61a and 61b of the first main bearing portion 61 from the distance.

  Next, the yoke 66 to which the two magnets 67 a and 67 b are fixed is attached to the first moving frame 51. The yoke 66 may be attached to the first moving frame 51 in advance before the first moving frame 51 is attached to the second moving frame 52. Next, the coil support base 85 to which the coil assembly 93 is attached is attached to the coil fixing portion 53 b of the fixed base 53. At this time, the cylindrical coil 91 is fitted from the side, and the lower piece 66b and the lower magnet 67b of the yoke 66 are inserted into the hole. Then, the coil support base 85 is fixed to the fixed base 53 using an adhering means such as an adhesive. Thereby, the assembly work of the image blur correction device 5 is completed, and the image blur correction device 5 having the configuration as shown in FIGS. 18 to 22 is obtained.

  The operation of the image blur correction apparatus 5 having such a configuration is as follows. The movement of the correction lens 15 of the image blur correction device 5 selectively or simultaneously supplies a driving current having an appropriate value to the flat coil 88 and the cylindrical coil 91 of the actuator 54 via the flexible wiring board 87. Executed by.

  The flat coil 88 and the cylindrical coil 91 of the image blur correction device 5 are fixed to the coil support base 85 via the magnetic plate 86 and the flexible wiring board 87, and further fixed to the fixed base 53 via the coil support base 85. Has been. At this time, the thrust generating portions 89 a and 89 b of the flat coil 88 are extended in the second direction Y, and the thrust generating portion 92 of the cylindrical coil 91 is extended in the first direction X. Further, since the two magnets 67a and 67b fixed to both ends of the yoke 66 are disposed above and below the coils 88 and 91, the magnetic flux of the magnetic circuit formed by the yoke 66 and the two magnets 67a and 67b is as follows. The thrust generators 89a and 89b of the flat coil 88 and the thrust generator 92 of the cylindrical coil 91 are transmitted vertically.

  On the other hand, the yoke 66 and the two magnets 67 a and 67 b are fixed to the first moving frame 51 that holds the correction lens 15. The correction lens 15 is supported by the first guide means having the first moving frame 51 so as to be movable in the first direction X with respect to the second moving frame 52. Further, the correction lens 15 is supported by a second guide means having a second moving frame 52 so as to be movable in the second direction Y with respect to the fixed base 53. Accordingly, the correction lens 15 is free to move in any of the first direction X and the second direction Y within a predetermined range by the action of the first guide means and the second guide means. be able to. Moreover, the magnetic plate 86 is attracted (or pressed) by the magnetic force of the two magnets 67a and 67b, and the backlash (gap) between the first moving frame 51 and the second moving frame 52 and the second The backlash (gap) between the moving frame 52 and the fixed base 53 is absorbed, and there is no backlash at each connecting portion. For this reason, the movement control of the correction lens 15 can be performed very accurately and smoothly.

  Now, when a current is passed through the flat coil 88, the thrust generating portions 89a and 89b extend in the second direction Y, so that the current flows in the second direction Y in the thrust generating portions 89a and 89b. At this time, since the magnetic flux of the magnetic circuit acts in the vertical direction perpendicular to the thrust generating portions 89a and 89b, the magnets 67a and 67b and the yoke 66 are directed in the first direction X according to Fleming's law. Force acts. As a result, the first moving frame 51 to which the yoke 66 and the like are fixed moves in the first direction X. As a result, the correction lens 15 held by the first moving frame 51 is guided by the first guide means and moves in the first direction X according to the magnitude of the current passed through the flat coil 88. It will be.

  On the other hand, when a current is passed through the cylindrical coil 91, the thrust generator 92 extends in the first direction X, and therefore the current flows in the first direction X in the thrust generator 92. At this time, since the magnetic flux of the magnetic circuit acts in the vertical direction perpendicular to the thrust generating portion 92, the force in the second direction Y is applied to the magnets 67a, 67b and the yoke 66 according to Fleming's law. Works. As a result, the second moving frame 52 moves in the second direction Y through the first moving frame 51 to which the yoke 66 and the like are fixed. As a result, in the correction lens 15, the second moving frame 52 is guided by the second guide means together with the first moving frame 51 in accordance with the magnitude of the current passed through the cylindrical coil 91. It moves in the direction Y.

  Further, when a current is simultaneously supplied to the flat coil 88 and the cylindrical coil 91, the above-described movement operation by the flat coil 88 and the movement operation by the cylindrical coil 91 are executed in combination. That is, the correction lens 15 is moved in the first direction X by the action of the current flowing through the flat coil 88, and at the same time, the correction lens 15 is moved in the second direction Y by the action of the current flowing in the cylindrical coil 91. As a result, the correction lens 15 moves in an oblique direction, and the image blur of the lens system 2 is corrected.

  As shown in FIGS. 1 to 11, the image blur correction device 5 having such a configuration and operation is attached to the lens device 1. The image blur correction device 5 is inserted into and removed from the opening 48 provided in the lower barrel 18 of the lens barrel 3 from the side, and is detachably attached to the lower barrel 18. In this case, since the image blur correction device 5 of the present invention is configured as a unit as a single device, the attaching / detaching operation thereof can be performed very simply and quickly. Reference numeral 98 shown in FIG. 11 and the like is a cover member that covers the image blur correction device 5. The cover member 98 is detachably attached to the lower barrel 18 of the lens barrel 3 by fixing means such as a fixing screw.

  Next, the operation of the lens system 2 of the lens apparatus 1 equipped with the image blur correction apparatus 5 will be described with reference to FIG. When the objective lens 7A of the lens device 1 is directed toward the subject, light from the subject is input into the lens system 2 from the objective lens 7A. At this time, the light transmitted through the objective lens 7A is refracted by 90 degrees by the prism 7B, and then moves toward the CCD 4 along the optical axis L of the lens system 2. That is, the light that is reflected by the prism 7B and exits the second lens 7C of the first group lens 7 passes through the second group lens 8, the third group lens 9, and the fourth group lens 10 and then the seventh lens 11A of the fifth group lens 11. Then, an image corresponding to the subject is formed on the imaging surface of the CCD 4 through the correction lens 15 and through the optical filter 14.

  In this case, at the time of shooting, when there is no camera shake or vibration in the lens apparatus 1, the light from the subject is centered on the center of each of the first group lens to the fifth group lens as the light 6A indicated by the solid line. Therefore, an image is formed at a predetermined position on the image forming plane of the CCD 4, and a beautiful image can be obtained without causing image blurring.

  On the other hand, when camera shake or vibration occurs in the lens apparatus 1 at the time of shooting, light from the subject is input to the first group lens in a tilted state as light 6B indicated by a one-dot chain line or light 6C indicated by a broken line. Will be. Such incident lights 6B and 6C are transmitted in a state shifted from the optical axis L in each of the first group lens to the fifth group lens, but the correction lens 15 is moved by a predetermined amount according to the hand shake or the like. Therefore, it is possible to correct the camera shake and the like. As a result, an image can be formed at a predetermined position on the imaging surface of the CCD 4, and image blur can be eliminated and a beautiful image can be obtained.

  The presence or absence of camera shake or vibration of the lens apparatus 1 is detected by a shake detection means. As this shake detection means, for example, a gyro sensor can be used. This gyro sensor is mounted on the camera body together with the lens device 1 so as to detect acceleration, angular velocity, angular acceleration, etc. acting on the lens device 1 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, and the first moving frame is applied to the shaking in the first direction X so as to form an image at a predetermined position on the imaging surface of the CCD 4. 51 is moved in the first direction X, and the actuator 54 is driven and controlled to move the second moving frame 52 in the second direction Y in response to the shaking in the second direction Y.

  FIGS. 13 to 17 are diagrams showing a digital still camera 100 showing a first example of an imaging apparatus including the lens apparatus 1 having the above-described configuration. The digital still camera 100 uses a semiconductor recording medium as an information recording medium, converts an optical image from a subject into an electrical signal by a CCD (solid-state imaging device), and records the signal on the semiconductor recording medium. It can be displayed on a display device such as a liquid crystal display.

  As shown in FIG. 13 and the like, the digital still camera 100 is based on a camera body 101, a lens device 1 that takes an image of a subject as light and guides it to a CCD 4 as an imaging unit, and a video signal output from the CCD 4. The display device 102 includes a liquid crystal display that displays an image, the control device 103 that controls the operation of the lens device 1 and the display of the liquid crystal display 102, and a battery power source (not shown).

  The camera body 101 is formed of a horizontally long flat housing, and partitions the front part 105 and the rear case 106 overlapped in the front-rear direction and the space formed by the front case 105 and the rear case 106 back and forth. A main frame 107 and a lens cover 108 slidably attached to the front surface of the front case 105 in the vertical direction are configured. The lens device 1 is fixed to one side of the front surface of the main frame 107 with the CCD 4 facing down and the optical axis L facing in the vertical direction. Further, a control device 103 formed by mounting a predetermined microcomputer, a resistor, a capacitor, and other electronic components on a wiring board, a flash device 110, and the like are attached to the main frame 107.

  The control device 103 is disposed side by side with the lens device 1, and the flash device 110 is disposed above them. The flash device 110 includes a light emitting unit 110a exposed on the front surface of the front case 105, a driving unit 110b that drives and controls the light emitting unit 110a, a capacitor 110c that supplies predetermined power to the driving unit 110b, and the like. ing. In order to expose the light emitting portion 110a of the flash device 110 and the objective lens 7A of the lens device 1, a lens fitting hole 111a and a flash fitting hole 111b are provided at corresponding positions of the front case 105. The objective lens 7A is fitted together with the decorative plate 21 in the lens fitting hole 111a, and the light emitting part 110a is fitted in the flash fitting hole 111b.

  Further, the front case 105 is provided with a plurality of opening holes 111c 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 111c, and can be locked at the upper end portion and the lower end portion by a locking means (not shown). As shown in FIG. 14, when the lens cover 108 is at the upper end, the objective lens 7A is completely closed, thereby protecting the objective lens 7A. On the other hand, as shown in FIG. 15, when the lens cover 108 is moved to the lower end, the objective lens 7A is completely opened and the power switch is turned on, thereby enabling photographing.

  As shown in FIGS. 13 and 16, 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 surface of the rear case 106, and the display device 102 is disposed inside thereof. 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 114 is disposed on the liquid crystal display side of the display device 102 via a seal frame 113, and the peripheral portion of the protective plate 114 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, 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 button 118 for selecting various menus. A direction key 119 for moving a cursor or the like for selecting a menu, a screen button 121 for switching a screen size or deleting a screen, and the like 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, and a speaker is built in the inside thereof, and a strap support fitting 123 is provided at the opposite end. Is attached.

  Further, as shown in FIG. 17 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. And a camera shake setting button 127 for performing image blur correction by operating No. 5. 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, the microphone hole 128 is also opened in the switch holder 124, and the built-in microphone is fixed to the switch holder 124.

  FIG. 31 is a block diagram illustrating a control concept of the image blur correction device 5 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 135 is connected to the image blur correction calculation unit 131 via a first amplifier (AMP) 134A, and a second gyro sensor 136 is connected via a second amplifier (AMP) 134B. Is connected.

  The first gyro sensor 135 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 136 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 94 as a first position detecting element is connected to the drive circuit unit 133 via a third amplifier (AMP) 135A, and the first amplifier is connected via a fourth amplifier (AMP) 135B. A second Hall element 95 which is a second position detection element is connected. Further, a flat coil 88 that is a first direction drive coil is connected to the drive circuit unit 133, and a cylindrical coil 91 that is a second direction drive coil is connected to the drive circuit unit 133.

  The displacement amount in the first direction X of the first moving frame 51 detected by the first Hall element 94 is input to the drive circuit unit 133 via the third amplifier 135A. The displacement amount in the second direction Y of the second moving frame 52 detected by the second Hall element 95 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 section 132, the drive circuit section 133 moves the correction lens 15 so as to correct image blur, so that either one or both of the flat coil 88 and the cylindrical coil 91 is moved. A predetermined control signal is output.

  FIG. 32 is a block diagram showing a first example of a schematic configuration of a digital still camera 100 including the image blur correction device 5 having the configuration and operation as described above. The digital still camera 100 includes a lens device 1 having an image blur correction device 5, a control unit 140 that plays a central role of a control device, a program memory, a data memory, and other RAMs and ROMs for driving the control unit 140. A storage device 141 having the above, an operation unit 142 for inputting various command signals for turning on / off the power, selecting a shooting mode or shooting, and the like, a display device 102 for displaying a shot video, and the like, An external memory 143 that expands the storage capacity is provided.

  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, a D / A converter 148, and a timing generator (TG) 149. And are connected. The analog signal processing unit 144 is connected to the CCD 4 attached to the lens device 1, and executes predetermined signal processing with an analog signal corresponding to a captured image output from the CCD 4. The analog signal processing unit 144 is connected to the first A / D converter 146, and the output is converted into a digital signal by the A / D converter 146.

  A digital signal processing unit 145 is connected to the first A / D converter 146, and predetermined signal processing is executed by 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, and an image corresponding to the subject is displayed on the display device 102 based on the digital signal that is the output signal, or to the external memory 143. Remembered. The second A / D converter 147 is connected to a gyro sensor 151 that shows a specific example of the shake detection unit. The gyro sensor 151 detects a shake or a shake of the camera body 101, and performs an 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 device 5 according to the position of the correction lens 15. The drive control unit 152 includes a first position detection unit 94 that is a position detection unit that detects the position of the correction lens 15 by detecting the positions of the image blur correction device 5 and the two moving frames 51 and 52. 2 position detecting means 95 is connected. The timing generator (TG) 149 is connected to the CCD 4.

  Thus, when an image of the subject is input to the lens system 2 of the lens apparatus 1 and formed on the imaging surface of the CCD 4, the image signal is output as an analog signal, and the analog signal processing unit 144 performs a predetermined process. After that, the first A / D converter 146 converts it into a digital signal. 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 device 5 is in an operating state and the camera body 101 is shaken or shaken, the gyro sensor 151 detects the shake or shake and controls the detection signal. Output to the unit 140. In response to this, the control unit 140 executes predetermined arithmetic processing and outputs a control signal for controlling the operation of the image blur correction device 5 to the drive control unit 152. The drive control unit 152 outputs a predetermined drive signal to the image blur correction device 5 based on the control signal from the control unit 140, moves the first moving frame 51 in the first direction X by a predetermined amount, and The second moving frame 52 is moved in the second direction Y by a predetermined amount. As a result, it is possible to eliminate image blur through the movement of the correction lens 15 and obtain a beautiful image.

  FIG. 33 is a block diagram showing a second example of a schematic configuration of a digital still camera including the image blur correction device 5 having the configuration and operation as described above. The digital still camera 100A includes a lens device 1 having an image blur correction device 5, a video recording / reproducing circuit unit 160 that plays a central role of a control device, and a program memory for driving the video recording / reproducing circuit unit 160. , Data memory and other internal memory 161 having RAM, ROM, and the like, a video signal processing unit 162 that processes captured video and the like into a predetermined signal, a display device 163 that displays the captured video and the like, and storage capacity An external memory 164 for enlarging the image, a correction lens control unit 165 for driving and controlling the image blur correction device 5, and the like.

  The video recording / reproducing circuit unit 160 includes, for example, an arithmetic circuit having a microcomputer (CPU). Connected to the video recording / reproducing circuit section 160 are a built-in memory 161, a video signal processing section 162, a correction lens control section 165, a monitor driving section 166, an amplifier 167, and three interfaces (I / F) 171, 172, 173. Has been. The video signal processing unit 162 is connected to the CCD 4 attached to the lens device 1 via an amplifier 167, and 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. Further, a connector 168 is connected to the first interface (I / F) 171, and 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, and a gyro sensor can be applied. The correction lens control unit 165 is connected to the lens drive unit of the image blur correction device 5 that controls the correction lens 15 and two position detection sensors 94 and 95 that detect the position of the correction lens 15. Has been.

  Thus, when an image of the subject is input to the lens system 2 of the lens apparatus 1 and formed on the imaging surface of the CCD 4, 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 device 5 is in an operating state, when the camera body 101 is shaken or shaken, the acceleration sensor 175 detects the shake or shake and corrects the detection signal. The image is output to the video recording / reproducing circuit unit 160 via the lens control unit 165. In response to this, the video recording / reproducing circuit unit 160 executes predetermined arithmetic processing and outputs a control signal for controlling the operation of the image blur correction device 5 to the correction lens control unit 165. The correction lens control unit 165 outputs a predetermined drive signal to the image blur correction device 5 based on the control signal from the video recording / reproduction circuit unit 160, and places the first moving frame 51 in the first direction X. The second moving frame 52 is moved by a predetermined amount in the second direction Y while moving by a fixed amount. As a result, it is possible to eliminate image blur through the movement of the correction lens 15 and obtain a beautiful image.

  FIG. 28 shows another example of the actuator 54 described above. The actuator 54A is configured by changing the assembly direction of the coil assembly 93, and its components are the same as those in the above embodiment. In this embodiment, the coil assembly 93 is attached to the fixed base 53 so that the longitudinal direction of the flat coil 88 (direction in which the thrust generating portion extends) is directed in the first direction X. The yoke 66 (which is the same with the magnets 67 a and 67 b) is aligned with the longitudinal direction of the flat coil 88, and the yoke 66 to which the magnets 67 a and 67 b are fixed is attached to the first moving frame 51. Accordingly, the thrust generating portion of the cylindrical coil 91 extends in the second direction Y orthogonal to the first direction X.

  In the case of this embodiment, when a current is passed through the flat coil 88, a force for moving the second moving frame 52 in the second direction Y is generated. Further, when a current is passed through the cylindrical coil 91, a force for moving the first moving frame 51 in the first direction X is generated.

  29 and 30 show another embodiment of the coil assembly 93 described above. In the coil assembly 181 shown in this embodiment, a flat coil 182 is used as a coil for the first driving means, and a flat coil 183 is also used as the coil for the second driving means. The two flat coils 182 and 183 are formed as an ellipse having the same size, and the coil assembly is configured such that the upper flat coil 182 is mounted on one surface of the flexible wiring board 184 and the lower flat coil 183 is attached to the other surface. A solid 181 is formed. The upper flat coil 182 and the lower flat coil 183 are arranged so that their longitudinal directions are orthogonal to each other.

  Furthermore, in this embodiment, one magnet 186 is attached to the upper piece of the U-shaped yoke 185, thereby constituting a magnetic circuit. The longitudinal direction of the magnet 186 is set in a direction orthogonal to the thrust generating portion of the upper flat coil 182. Even with the coil assembly 181 having such a configuration, it is possible to obtain the same effects as in the above-described embodiment. In particular, in the case of the present embodiment, since the thickness of the coil assembly 181 can be made extremely thinner than that of the coil assembly 93, the overall device can be made thinner.

  34 to 45 show other embodiments of the image blur correction device of the present invention. That is, FIGS. 34 to 39 are applied to an image blur correction apparatus 300 provided with a moving magnet type driving means. 40 to 45 are applied to an image blur correction device 301 having a moving coil type driving means. In these embodiments, a flat coil is applied as both the first coil 88A that generates a force moving in the first direction X and the second coil 91A that generates a force moving in the second direction Y. The coils are arranged at positions that are rotated and displaced by approximately 90 degrees on the same plane, and magnets 67A, 67B, 67C, 67D and yokes 66A, 66B, 66C, 66D are individually provided corresponding to the coils. .

  As shown in FIGS. 34 to 38, the image blur correction apparatus 300 having a moving magnet type actuator includes a first moving frame 51A, a second moving frame 52A, and a fixed base 53A. The first moving frame 51A has a ring-shaped lens fixing portion 51a and two yoke fixing portions 51b and 51c provided integrally therewith, and the two yoke fixing portions 51b and 51c are lens fixing. It is provided at a position outside the portion 51a in the radial direction and rotated and displaced by approximately 90 degrees. A fitting hole 58 is provided at the center of the lens fixing portion 51a, and the correction lens 15 is fitted and fixed in the fitting hole 58.

  The second yoke fixing portion 51c of the lens fixing portion 51a of the first moving frame 51A is a first main bearing portion 61. A first sub-bearing portion 62 is provided on the opposite side of the lens fixing portion 51 a across the correction lens 15. A first main guide shaft 63 is passed through the first main bearing portion 61 in the horizontal direction, and the first main guide shaft 63 is press-fitted and fixed to the first main bearing portion 61 at an intermediate portion thereof. . The first sub-bearing portion 62 is provided with a bearing groove 64 opened to the side, and the first sub-guide shaft 65 is slidably engaged with the bearing groove 64. .

  U-shaped yokes 66A and 66B are integrally fixed to the first yoke fixing portion 51b and the second yoke fixing portion 51c, respectively. The first yoke 66A and the second yoke 66B are the same, and are arranged with the two pieces 66a and 66b facing each other facing each other in the vertical direction, and connecting the two pieces 66a and 66b. The piece 66c is attached to each yoke fixing portion 51b, 51c by fixing it with an adhering means such as an adhesive. The upper piece 66a and the lower piece 66b of each yoke 66A, 66B are rectangular, and flat and rectangular magnets 67A, 67B having substantially the same planar shape are formed on the inner surfaces of the upper pieces 66a, 66a. It is integrally fixed by an adhering means such as an adhesive.

  The magnets 67A and 67B may be configured to be fixed to the upper and lower pieces of the yokes 66A and 66B, respectively, as in the above embodiment, but the upper piece 66a (the lower piece 66b) as in this embodiment. It is also possible to make the entire apparatus thinner by adopting a configuration in which it is fixed only to the device.

  The second moving frame 52A is formed as a perforated member whose planar shape forms a ring shape, and the fitting hole 58 of the first moving frame 51A is opposed to the central through hole 68. A second main bearing portion 71 composed of two bearing pieces 71a and 71b is provided on one diameter direction side of the second moving frame 52A. Projection portions at both ends of the first main guide shaft 63 fixed to the first moving frame 51A are slidably inserted into the bearing holes 71c of the two bearing pieces 71a and 71b, and are supported rotatably. ing. A second sub-bearing portion 72 composed of two bearing pieces 72a and 72b is provided on the opposite side of the second moving frame 52A from the second main bearing portion 71. The first sub guide shaft 65 is supported at both ends by the two bearing pieces 72a and 72b.

  The direction in which the first sub guide shaft 65 supported by the second sub bearing portion 72 extends is the second direction Y in this embodiment. In a direction orthogonal to the second direction Y, a third main bearing portion 75 is provided on one side of the second moving frame 52A, and a third auxiliary bearing portion 76 is located on the opposite side of the through hole 68. Is provided. A second main guide shaft 77 is passed through the third main bearing portion 75, and the second main guide shaft 77 is press-fitted and fixed to the third main bearing portion 75 at an intermediate portion thereof. Further, the third sub bearing portion 76 is provided with a bearing groove 78 opened to the side, and the second sub guide shaft 79 is slidably engaged with the bearing groove 78. .

  The fixed base 53A has a shape corresponding to the shape of the first moving frame 51A, and has a ring-shaped base portion 53a and two coil support portions 53b and 53c provided integrally therewith. . The two coil support parts 53b and 53c are provided at positions radially outward of the base part 53a and rotated and displaced by approximately 90 degrees. A through hole 81 is provided in the central portion of the base portion 53a. The through hole 81 is formed to be substantially concentric with the fitting hole 58 of the first moving frame 51A and the through hole 68 of the second moving frame 52A.

  The two coil support portions 53b and 53c of the fixed base 53A have two support pieces 341a and 341b provided at predetermined intervals in the tangential direction of the base portion 53a, respectively. In each of the coil support portions 53b and 53c, magnetic plates 86A and 86B are bridged between the two support pieces 341a and 341b. The magnetic plates 86A and 86B are fixed to the coil support portions 53b and 53c by fixing means such as an adhesive. A flexible wiring board 87 is placed on these magnetic plates 86A and 86B.

  The flexible wiring board 87 includes a first coil mounting portion 87a and a second coil mounting portion 87b having substantially the same size as the magnetic plates 86A and 86B, and both the coil mounting portions 87a and 87b are connected portions. It is connected integrally by 87c and is comprised integrally. The first coil mounting portion 87a and the second coil mounting portion 87b are arranged so as to overlap the two magnetic plates 86A and 86B fixed to the two coil support portions 53b and 53c of the fixed base 53A. The first coil 88A is mounted on the first coil mounting portion 87a, and the second coil 91A is mounted on the second coil mounting portion 87b. The coils 88A and 91A are electrically connected to the wiring patterns provided on the coil mounting portions 87a and 87b.

  The two support pieces 341a and 341b of the first coil support portion 53b constitute a fourth main bearing portion 82, and a bearing hole 342 is provided in each of the support pieces 341a and 341b. In addition, a fourth sub bearing portion 83 including two bearing pieces 83a and 83b is provided on the side edge portion of the base portion 53a of the fixed base 53A opposite to the first coil support portion 53b across the through hole 81. Is provided. Projections at both ends of the second main guide shaft 77 of the second moving frame 52A are slidably inserted into the bearing holes 342 of the two support pieces 341a and 341b of the fourth main bearing portion 82. , Is supported rotatably. Further, both end portions of the second sub guide shaft 79 are fixed to the two bearing pieces 83a and 83b of the fourth sub bearing portion 83 and supported at both ends.

  In this embodiment, the axial direction of the first main guide shaft 63 and the first sub guide shaft 65 is the first direction X, and the second main guide shaft 77 extending in a direction orthogonal to these directions, The axial direction of the second sub guide shaft 79 is a second direction Y. Then, between the lower piece 66b of the first yoke 66A fixed to the first moving frame 51A and the magnet 67A, the magnetic plate 86A fixed to the first coil support portion 53b of the fixed base 53A and the first The coil mounting portion 87a and the first coil 88A are interposed in a non-contact state. Furthermore, the magnetic plate 86B and the second plate fixed to the second coil support portion 53c of the fixed base 53A are disposed between the lower piece 66b of the second yoke 66B fixed to the first moving frame 51A and the magnet 67B. The coil mounting portion 87b and the second coil 91A are interposed in a non-contact state.

  The positioning of the first moving frame 51A and the fixed base 53A can be performed easily and reliably by, for example, providing positioning holes in each of them and inserting a reference pin into these positioning holes and temporarily fixing them. Can do.

  According to the image blur correction apparatus 300 shown in this embodiment, the magnetic plates 86A and 86B are attracted by the magnets 67A and 67B of the actuator as shown in FIGS. The moving frame 51A is urged so as to approach the second moving frame 52A, and the second moving frame 52A is urged so as to approach the fixed base 53A. Therefore, rattling in the first bearing portion and the second bearing portion connecting the first moving frame 51A and the second moving frame 52A is eliminated (FIG. 38B), and at the same time, the second moving frame 52A and the fixed base 53A are eliminated. Can be eliminated (FIG. 38C). As a result, the first moving frame 51A and the second moving frame 52A that hold the correction lens can be moved smoothly, and the correction lens 15 can always be held in a constant posture. Degradation of optical performance can be prevented.

  An image blur correction apparatus 300A shown in FIG. 39 shows a modified embodiment of the image blur correction apparatus 300 shown in FIGS. 34 to 38, and two magnets 67C and 67D are arranged below the two coils 88A and 91A. It is what. That is, the first magnet 67C and the second magnet 67D are fixed to the inner surfaces of the lower pieces 66b of the first yoke 66A and the second yoke 66B, respectively. Correspondingly, the first coil 88A and the second coil 88A are connected to the lower surfaces of the magnetic plates 86A and 86B fixed to the first coil support portion 53b and the second coil support portion 53c via the flexible wiring board 87. The coil 91A is fixed. A first magnet 67C and a second magnet 67D are disposed below the first and second coils 88A and 91A with an appropriate gap.

  Other configurations are the same as those of the image blur correction apparatus 300 shown in FIGS. Even with the configuration as shown in FIG. 39, the same effect as in the above embodiment can be obtained.

  An image blur correction apparatus 301 having a moving coil type actuator shown in FIGS. 40 to 45 replaces the two magnets 67A and 67B and the two coils 88A and 91A in the image blur correction apparatus 300 shown in the embodiment. The driving means is configured as a moving coil system. In this image blur correction apparatus 301, the same parts as those in the image blur correction apparatus 300 are denoted by the same reference numerals, and redundant description is omitted.

  The image blur correction device 301 includes a first moving frame 51B, a second moving frame 52A, and a fixed base 53B. The first moving frame 51B includes a ring-shaped lens fixing portion 51a and two coil fixing portions 51b and 51c provided integrally therewith. The two coil fixing portions 51b and 51c are provided at positions radially outward of the lens fixing portion 51a and rotated and displaced by approximately 90 degrees. A fitting hole 58 is provided at the center of the lens fixing portion 51a, and the correction lens 15 is fitted and fixed in the fitting hole 58.

  The first coil mounting portion 87a of the flexible wiring board 87 is placed on the first coil fixing portion 51b via the first magnetic plate 86A. In addition, the second coil mounting portion 87b of the flexible wiring board 87 is placed on the second coil fixing portion 51c via the second magnetic plate 86B. The first and second coils 88A and 91A are mounted on the first and second coil mounting portions 87a and 87b, and the coils 88A and 91A are electrically connected to the wiring patterns of the coil mounting portions 87a and 87b. It is connected to the. The configuration of the second moving frame 52A is the same as that in the above embodiment.

  The outer shape of the fixed base 53B is substantially the same as that of the fixed base 53A, but the shape of the support portion is slightly different in order to fix the yokes 66C and 66D. That is, a fitting groove 343 into which the lower piece 66b of each of the yokes 66C and 66D is fitted is provided on the upper surfaces of the two yoke support portions 53b and 53c of the fixed base 53B. The lower piece 66b is fitted in the fitting groove 343, and is fixed by a fixing means such as an adhesive. Although there is no change in the basic form of each yoke 66C, 66D, a large opening hole 344 is provided in the connecting portion 66c for weight reduction. Other configurations are the same as those of the image blur correction apparatus 300 shown in FIGS.

  In this embodiment, as in the previous embodiment, the first main guide shaft 63 and the first sub guide shaft 65 have the first direction X as the axial direction, and extend in a direction orthogonal thereto. The axial direction of the main guide shaft 77 and the second sub guide shaft 79 is the second direction Y. And between the lower piece 66b of the first yoke 66C fixed to the fixed base 53B and the magnet 67A, the magnetic plate 86A fixed to the first coil support part 51b of the first moving frame 51B and the first The coil mounting portion 87a and the first coil 88A are interposed in a non-contact state. Further, the magnetic plate 86B and the second plate fixed to the second coil support portion 51c of the first moving frame 51B are disposed between the lower piece 66b of the second yoke 66D fixed to the fixed base 53B and the magnet 67B. The coil mounting portion 87b and the second coil 91A are interposed in a non-contact state.

  According to the image blur correction apparatus 301 shown in this embodiment, the magnetic plates 86A and 86B are attracted by the magnets 67A and 67B of the actuator, as shown in FIGS. The moving frame 51B is urged away from the second moving frame 52A, and the second moving frame 52A is urged away from the fixed base 53B. Therefore, rattling in the first bearing portion and the second bearing portion connecting the first moving frame 51B and the second moving frame 52A is eliminated (FIG. 44B), and at the same time, the second moving frame 52A and the fixed base 53B are removed. It is possible to eliminate backlash in the third bearing portion and the fourth bearing portion that connect the two (FIG. 44C). As a result, the first moving frame 51B and the second moving frame 52A that hold the correction lens can be moved smoothly, and the correction lens 15 can always be held in a constant posture. Degradation of optical performance can be prevented.

  An image blur correction device 301A shown in FIG. 45 shows a modified embodiment of the image blur correction device 301 shown in FIGS. 40 to 44, and two magnets 67C and 67D are arranged below the two coils 88A and 91A. It is a thing. That is, the first magnet 67C and the second magnet 67D are fixed to the inner surfaces of the lower pieces 66b of the first yoke 66C and the second yoke 66D, respectively. Corresponding to this, the lower surface of each magnetic plate 86A, 86B fixed to the first coil support portion 51b and the second coil support portion 51c of the first moving frame 51B is provided via the flexible wiring board 87. The first coil 88A and the second coil 91A are fixed. A first magnet 67C and a second magnet 67D are disposed below the first and second coils 88A and 91A with an appropriate gap.

  Other configurations are the same as those of the image blur correction apparatus 301 shown in FIGS. Even with the configuration shown in FIG. 45, it is possible to obtain the same effects as in the above-described embodiment.

  In the above-described embodiment, the example using the magnetic plates 86A and 86B made of iron, nickel or the like before being magnetized as the magnetic material has been described. However, the magnet is previously magnetized to a strength that does not hinder the function of the actuator. Of course, a so-called weak magnetic material called a magnetic plate can be applied.

  As described above, according to the image blur correction device of the present invention, a coil assembly including two coils and a flexible wiring board that supplies electric power to the two coils is fixed to a fixed base, and a yoke and Since the magnet is fixed to the first moving frame, it is possible to move the correction lens by applying a thrust generated by passing a current through the coil to the yoke and the magnet side. As a result, the flexible wiring board connected to the coil assembly can be fixed at a fixed location, and it is not necessary to secure a space for moving the flexible wiring board, and the apparatus can be miniaturized. In addition, since the correction lens is not moved integrally with the flexible wiring board, the amount of thrust required to move the correction lens does not require a force enough to bend the flexible wiring board, and the power consumption of the image blur correction device. Can be reduced.

  In addition, the lens device is configured as a folding lens, and the light transmitted through the objective lens is bent 90 degrees by the prism and then guided to the correction lens (fifth lens group) of the image blur correction device. When the lens is in the normal posture, the correction lens is parallel to the ground, and the first direction and the second direction, which are the movement directions of the correction lens, and the direction in which gravity acts are perpendicular to each other. As a result, the first and second moving frames that hold the correction lens movably are not pulled in the first direction and the second direction by gravity, and the first and second moving frames are moved to gravity. It is not always necessary to energize the image blur correction device in order to lift and hold it in the opposite direction. As a result, it is possible to drastically reduce the power consumption when shooting with the imaging apparatus in the normal posture, and the usage time of the imaging apparatus can be extended. In addition, since the thrust for moving the correction lens can be reduced, it is possible to tolerate the own weight of the first and second moving frames, that is, about 1G camera shake acceleration. Can also respond.

  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 the imaging device has been described. However, the present invention can also be applied to a digital video camera, a personal computer with a camera, a mobile phone with a camera, and other imaging devices. Furthermore, although the example using a 5 group lens as the lens apparatus 1 was demonstrated, it is needless to say that it may 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 a lens device according to the present invention as viewed from the front side. It is the perspective view which looked at the lens apparatus shown in FIG. 1 from the back side. It is a front view of the lens apparatus shown in FIG. It is a rear view of the lens apparatus shown in FIG. It is a left view of the lens apparatus shown in FIG. It is a right view of the lens apparatus shown in FIG. It is a top view of the lens apparatus shown in FIG. It is a bottom view of the lens apparatus shown in FIG. It is sectional drawing of the MM line | wire part of the lens apparatus shown in FIG. It is sectional drawing of the NN line | wire part of the lens apparatus shown in FIG. It is a disassembled perspective view of the lens apparatus shown in FIG. It is explanatory drawing for demonstrating the lens system of the lens apparatus shown in FIG. FIG. 1 is an exploded perspective view illustrating a first embodiment of an imaging apparatus according to the present invention and applied to a digital still camera. 1 is a perspective view of a digital still camera according to a first embodiment of an imaging apparatus of 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 digital still camera according to a first embodiment of an imaging apparatus of the present invention as viewed from the front side, with a lens cover opened and an objective lens exposed. FIG. It is a rear view of the digital still camera shown in FIG. It is a top view of the digital still camera shown in FIG. 1 is a perspective view of a first embodiment of an image blur correction device according to the present invention, viewed from the front side. It is the perspective view which looked at the image blurring correction apparatus shown in FIG. 18 from the back side. FIG. 19 is a plan view of the image blur correction device illustrated in FIG. 18. FIG. 19 is a front view of the image blur correction device shown in FIG. 18. FIG. 19 is a rear view of the image blur correction device illustrated in FIG. 18. FIG. 19 is an exploded perspective view of the image blur correction device illustrated in FIG. 18. FIG. 19 is a perspective view illustrating a first moving frame of the image blur correction device in FIG. 18. FIG. 19 is an exploded perspective view showing a coil assembly, a magnet, and a yoke of the image blur correction device of FIG. 18. FIG. 19 is an enlarged plan view of a coil assembly, a magnet, and a yoke of the image blur correction device shown in FIG. 18. FIG. 19 is an enlarged front view of a coil assembly, a magnet, and a yoke of the image blur correction device shown in FIG. 18. It is a top view which shows the 2nd Example of the coil assembly which concerns on the image blurring correction apparatus of this invention, a magnet, and a yoke. It is a perspective view which shows the 3rd Example of the coil assembly which concerns on the image blurring correction apparatus of this invention, a magnet, and a yoke. FIG. 30 is an exploded perspective view of the coil assembly, magnet, and yoke shown in FIG. 29. 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 according to the present invention. It is a block diagram which shows the 2nd Example of schematic structure of the imaging device which concerns on this invention. It is an exploded perspective view showing an example applied to a moving magnet type image blur correction device of the present invention. FIG. 35 is an external perspective view of the assembled image blur correction device of FIG. 34. FIG. 36 is a plan view showing the image blur correction device of FIG. 35. 35 shows the image blur correction device of FIG. 35, where FIG. A is a front view, FIG. B is a rear view, and FIG. C is a left side view. 35 shows the image blur correction device of FIG. 35, where FIG. A is a right side view, FIG. B is a cross-sectional view taken along line P-P in FIG. 36, and FIG. 35 shows a modified embodiment of the image blur correction device of FIG. 35, in which FIG. A is a sectional view of a portion corresponding to the PP line portion of FIG. 36, and FIG. 35B is equivalent to a QQ line portion of FIG. It is sectional drawing of the part to do. It is an exploded perspective view showing an example applied to a moving coil type image blur correction device of the present invention. It is the external appearance perspective view which assembled the image blurring correction apparatus of FIG. FIG. 42 is a plan view showing the image blur correction device of FIG. 41. 41 shows the image blur correction device of FIG. 41, where FIG. A is a front view, FIG. B is a rear view, and FIG. C is a left side view. 41 shows the image blur correction device of FIG. 41, where FIG. A is a right side view, FIG. B is a cross-sectional view taken along line RR in FIG. 42, and FIG. 41 shows a modified embodiment of the image blur correction apparatus of FIG. 41, in which FIG. A is a sectional view of a portion corresponding to the RR line portion of FIG. 42, and FIG. B is equivalent to an SS line portion of FIG. It is sectional drawing of the part to do.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Lens apparatus, 2 ... Lens system, 3 ... Lens barrel, 4 ... CCD (imaging means), 5 ... Image blur correction apparatus, 7 ... 1 group lens, 7A ... Objective lens (1st lens), 7B ... Prism, 7C ... second lens, 8 ... 2 group lens, 9 ... 3 group lens, 10 ... 4 group lens, 11 ... 5 group lens, 15 ... correction lens, 16 ... upper lens barrel, 17 ... intermediate lens barrel, 18 ... Lower barrel 51, 51A, 51B ... First moving frame (moving frame) 52, 52A ... Second moving frame (moving frame) 53, 53A, 53B ... Fixed base (supporting frame), 54 54A ... Actuator (drive means), 58 ... Fitting hole, 61 ... First main bearing portion, 62 ... First sub-bearing portion, 63 ... First main guide shaft, 64 ... Bearing groove, 65 ... First 1 sub guide shaft, 66, 66A, 66B, 66C, 6 D ... Yoke, 66a ... Upper piece, 66b ... Lower piece, 66c ... Connection piece, 67a, 67b, 67A, 67B, 67C, 67D ... Magnet, 71 ... Second main bearing portion, 72 ... Second auxiliary bearing portion 75 ... Third main bearing portion, 76 ... Third sub bearing portion, 77 ... Second main guide shaft, 78 ... Bearing groove, 79 ... Second sub guide shaft, 82 ... Fourth main bearing portion 83 ... 4th sub bearing part, 85 ... Coil support, 85a ... Positioning convex part, 86A, 86B ... Magnetic plate (magnetic body), 87 ... Flexible wiring board, 88, 88A, 91A ... Flat coil, 88a, 88b ... Coil part, 89a, 89b, 92 ... Thrust generating part, 91 ... Cylindrical coil, 93 ... Coil assembly, 94 ... First hall element (first position detecting means), 95 ... Second hall element (Second position detection Stage)

Claims (6)

A driving means having a coil and a magnet which are relatively movable;
The correction lens held in the moving frame by the driving unit is moved in a first direction orthogonal to the optical axis of the lens system and a second direction orthogonal to the first direction and orthogonal to the optical axis. An image blur correction apparatus capable of moving and correcting image blur by controlling the optical axis of the correction lens so as to coincide with the optical axis of the lens system,
One of the coil and the magnet is fixed to the moving frame, and the other is fixed to a supporting frame that supports the moving frame movably.
The driving means includes a first coil that moves the correction lens in the first direction, a second coil that moves the correction lens in the second direction, the first coil, and the second coil. A magnet for applying a magnetic force to the first coil, and the first coil and the second coil have a thrust generating portion of each coil in the first direction and the second coil by the action of the magnetic force of the magnet. Arrange to face the direction,
An image blur correction apparatus, wherein a magnetic material attracted by the magnetic force of the magnet is interposed between the first coil and the second coil and the support frame or the moving frame. The magnetic body is a sheet-like magnetic plate,
The image according to claim 1, wherein a coil mounting portion provided on a flexible wiring board is fixed to the magnetic plate, and at least one of the first coil and the second coil is fixed to the coil mounting portion. Blur correction device.   The first coil and the second coil are a combination of two flat coils that are wound in a plane and have a straight line portion that serves as the thrust generation unit, and the first coil and the second coil. The image blur correction device according to claim 2, wherein the image mounting unit is arranged so as to overlap above and below the coil mounting portion.   The first coil and the second coil are flatly wound and have a flat coil having a straight line portion serving as the thrust generation unit, and have a predetermined thickness in the stacking direction and serve as the thrust generation unit. 3. The image blur correction device according to claim 2, comprising a combination with a cylindrical coil having a linear portion, wherein the first coil and the second coil are arranged so as to overlap above and below the coil mounting portion. . Provide driving means having a coil and a magnet that are relatively movable,
The correction lens held in the moving frame by the driving unit is moved in a first direction orthogonal to the optical axis of the lens system and a second direction orthogonal to the first direction and orthogonal to the optical axis. A lens apparatus comprising an image blur correction device that is movable and capable of correcting image blur by controlling the optical axis of the correction lens to coincide with the optical axis of the lens system,
The image blur correction device includes:
One of the coil and the magnet is fixed to the moving frame, and the other is fixed to a supporting frame that supports the moving frame movably.
The driving means includes a first coil that moves the correction lens in the first direction, a second coil that moves the correction lens in the second direction, the first coil, and a second coil. A magnet for applying a magnetic force to the coil, and the first coil and the second coil have a thrust generating portion of each coil in the first direction and the second direction by the action of the magnetic force of the magnet. Arrange to face the
A lens apparatus, wherein a magnetic material attracted by the magnetic force of the magnet is interposed between the first coil and the second coil and the support frame or the moving frame. Provide driving means having a coil and a magnet that are relatively movable,
The correction lens held in the moving frame by the driving unit is moved in a first direction orthogonal to the optical axis of the lens system and a second direction orthogonal to the first direction and orthogonal to the optical axis. An image pickup apparatus comprising a lens device having an image blur correction device capable of moving and correcting an image blur by controlling the optical axis of the correction lens to coincide with the optical axis of the lens system,
The image blur correction device includes:
One of the coil and the magnet is fixed to the moving frame, and the other is fixed to a supporting frame that supports the moving frame movably.
The driving means includes a first coil that moves the correction lens in the first direction, a second coil that moves the correction lens in the second direction, the first coil, and a second coil. A magnet for applying a magnetic force to the coil, and the first coil and the second coil have a thrust generating portion of each coil in the first direction and the second direction by the action of the magnetic force of the magnet. Arrange to face the
An image pickup apparatus, wherein a magnetic material attracted by the magnetic force of the magnet is interposed between the first coil and the second coil and the support frame or the moving frame.

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