JP4770282B2 - LENS DEVICE AND IMAGING DEVICE - Google Patents

Description

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

  In recent years, there has been a remarkable improvement in the performance of imaging devices such as digital still cameras and video cameras, and anyone can easily shoot high-quality, high-performance still images and moving images. The improvement in 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 image 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 lens 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, an effect of “being able to respond to high-frequency vibration without increasing the cost or requiring a large space” is expected. Is done.

  As another example of the conventional lens device, for example, there is a device described in Patent Document 2. Patent Document 2 relates to an image blur suppression apparatus for a camera that detects vibration (hand shake) having a frequency of about 1 Hz to 12 Hz generated in a device such as a camera and uses this as information for image blur suppression to prevent image blur. Are listed. The image blur suppression device for a camera described in Patent Document 2 (hereinafter referred to as “second conventional example”) is based on “detection information of vibration generated in a lens barrel”. Image blur suppression of a camera that obtains a correction amount for decentering the optical axis necessary for suppression, and moves and controls the correction optical system that is floatingly supported so as to be movable in the radial direction with respect to the lens barrel. The floating support of the correction optical system supports the correction optical system movably with respect to a first direction defined in a plane perpendicular to the optical axis but restricts movement in other directions. A first holding frame and a second holding frame that supports the second holding frame so as to be movable in a second direction different from the first direction within the plane but restrains movement in the other direction. And the second holding frame is fixed to the lens barrel " That.

  According to the image blur suppression device for a camera described in Patent Document 2 having such a configuration, “there is an effect that there is no out-of-focus problem at the time of image blur suppression. It is expected that the camera can be miniaturized because the camera can be made smaller.

  As another example of the conventional lens device, for example, there is a device described in Patent Document 3. Patent Document 3 describes a lens driving device for optical equipment. The lens driving device described in Patent Document 3 (hereinafter referred to as “third conventional example”) is “the first direction in the plane perpendicular to the optical axis of the lens is the lens housing portion that holds the lens. A first driving means for driving the first driving means, and a second driving means for driving in a second direction orthogonal to the first direction in the plane, wherein the first driving means And the second driving means are arranged along an axis parallel to the optical axis of the lens ”.

According to the lens driving device described in Patent Document 3 having such a configuration, an effect that “a lens driving device that drives a correction lens for correcting image blurring can be reduced in size” is expected.
Japanese Patent Laid-Open No. 3-186823 Japanese Patent Laid-Open No. 3-188430 JP-A-10-311995

  However, in any of the first to third conventional examples, the image blur correction device is integrally assembled in the lens barrel, and the image blur correction device cannot be easily removed. It was. Therefore, for example, in an adjustment operation after assembling the image blur correction device on the lens barrel, a state in which a predetermined amount of thrust cannot be obtained to move the correction lens, or a predetermined stroke is caused by a short moving distance. If an unusable state or the like occurs, the entire lens apparatus must be disassembled for adjustment of the image blur correction device, replacement of parts, and the like, and adjustment work becomes difficult, resulting in poor product yield.

  Also, when a failure occurs in the image blur correction device, the lens device must be disassembled and the image blur correction device must be taken out and then the necessary parts must be adjusted and parts must be replaced. There is a problem that the work becomes complicated and troublesome.

  The problem to be solved is that, in the conventional lens device, the image blur correction device is integrally assembled with the lens housing, and the image blur correction device alone cannot be taken out. Adjustment work and repair work are complicated and troublesome.

The lens apparatus according to the present application includes a lens system in which a plurality of lenses are arranged on the optical axis with the optical axes thereof aligned, a lens barrel that supports the plurality of lenses so as to be fixed or movable, and an optical axis of the lens system. and the correction lens moving mechanism for moving in a direction perpendicular, the provided image blur obtained through a lens system by moving in a direction perpendicular to the correction lens can be corrected in accordance with the shaking of the lens barrel, the correcting lens The moving mechanism includes a first moving frame that supports the correction lens, and a second guide that movably supports the first moving frame via a first guide unit that guides in a first direction orthogonal to the optical axis. A movable base, and a fixed base that movably supports the second movable frame via a second guide means that guides in a second direction that is perpendicular to the optical axis and perpendicular to the first direction. , First movement along the first guide means The first driving means for moving the second moving means and the second driving means for moving the second moving frame along the second guide means, the first driving means and the second driving means, It consists of two coils, a magnet that applies magnetic force to the two coils, and a yoke that supports the magnets. The image blur correction unit is configured by uniting the correction lens and the correction lens moving mechanism so as to intersect with each other so as to cross each other , and the image blur correction unit can be attached to and detached from the lens barrel. A unit storage section that can be mounted on the

In addition, an imaging apparatus according to the present application includes a lens system in which a plurality of lenses are arranged on the optical axis with the optical axes aligned with each other, and a lens apparatus having a lens barrel that supports the plurality of lenses in a fixed or movable manner. A correction lens that can move in a direction orthogonal to the optical axis of the lens system, and a correction lens movement mechanism that moves the correction lens in a direction orthogonal to the optical axis. The image blur obtained through the lens system can be corrected by moving in the moving direction, and the correction lens moving mechanism guides the first moving frame that supports the correction lens and the first direction orthogonal to the optical axis. A second moving frame that movably supports the first moving frame via the first guide means and a second direction that is orthogonal to the optical axis and that is also orthogonal to the first direction. Through the second guide means A fixed base for movably supporting the second moving frame, a first driving means for moving the first moving frame along the first guide means, and a second movement along the second guide means Second driving means for moving the frame, and the first driving means and the second driving means include two coils, a magnet for applying a magnetic force to the two coils, and a yoke for supporting the magnet. The two coils are arranged so that the thrust generation portions of the coils cross each other in the first direction and the second direction by the action of the magnetic force of the magnet and overlap each other. An image blur correction unit is configured by unitizing the moving mechanism, and a unit housing portion in which the image blur correction unit can be detachably attached is provided in the lens barrel.

  According to the lens device and the image pickup apparatus of the present invention, the correction lens and the correction lens moving mechanism are unitized to form an image blur correction unit, and the unit storage portion to which the image blur correction unit can be detachably attached is provided as a lens. To provide a lens apparatus and an imaging apparatus that can be replaced only by an image blur correction unit and can be easily and easily adjusted or repaired by providing the lens barrel. Can do.

  An image blur correction unit is configured by unitizing the correction lens and the correction lens moving mechanism, and a unit housing portion in which the image blur correction unit can be detachably attached is provided in the lens barrel, so that only the image blur correction unit is provided. A lens device and an imaging device that can be exchanged and can easily and easily perform adjustment work and repair work of the image blur correction unit have been realized with a simple configuration.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 1 to 35 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, and FIG. 4 is a rear view. 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 a 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 a first embodiment of the image blur correcting device according to the lens apparatus of the present invention, FIG. 19 is a perspective view seen from the back side, and FIG. 21 is a front view, FIG. 22 is a rear view, and FIG. 23 is an exploded perspective view. 24 is a perspective view showing a first moving frame of the image blur correction unit, 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 and the like, and FIG. FIG.

  28 is a plan view showing a second embodiment of the coil assembly, magnet and yoke, FIG. 29 is a perspective view showing a third embodiment of the coil assembly, etc., FIG. 30 is an exploded perspective view, and FIG. FIG. 32 is a block diagram illustrating a control concept of the image blur correction apparatus according to the present invention, FIG. 32 is a block diagram illustrating a first embodiment of a schematic configuration of the imaging apparatus according to the present invention, and FIG. 33 is a schematic configuration of the imaging apparatus. FIG. 34 is an explanatory diagram showing a second example of the image pickup apparatus of the present invention, and FIG. 35 is an explanatory diagram showing a third example.

  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 located on the tip 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 superimposed on the lower lens barrel 18, and an upper lens barrel 16 is superimposed on the intermediate lens barrel 17, and a plurality of (three) In the embodiment, the lens barrel 3 is configured by being fastened and fixed by three) fixing screws 29b and assembled integrally.

  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.

  On one side surface of the lower barrel 18, a unit storage portion 48 having an opening portion opened to the side is provided. An image blur correction unit 5 that is an image blur correction device that is taken in and out from the side is detachably attached to the unit storage portion 48. The image blur correction unit 5 has a configuration as shown in FIGS.

  The image blur correction unit 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 second direction Y that is perpendicular to the optical axis L and is also perpendicular 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 55 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 the first moving frame 51.

  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 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 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 73. The two bearing pieces 72a and 72b are respectively provided with bearing holes, and both end portions of the first sub guide shaft 73 are press-fitted and fixed to these bearing holes, respectively. The first sub guide shaft 73 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 73 and the first main guide shaft 63 are set so that their axis lines are parallel to each other, and are guided by the both guide shafts 63 and 65 to be 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.

  As shown in FIG. 23, the fixed base 53 includes a moving frame support portion 53a having a size corresponding to the second moving frame 52, and a coil fixing portion provided integrally and continuously with the moving frame support portion 53a. 53b and the like. An attachment boss portion 53 c for fixing this to the lens barrel 3 is provided on the lower surface of the fixed base 53. 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 bearing that supports the second moving frame 52 slidably in the second direction Y via the second guide shaft at both ends of the upper surface of the moving frame supporting portion 53a in the first direction X. 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.

  Thereby, the both ends of the 2nd main guide shaft 77 are each projected outside 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. As a result, 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.

  The upper surface of the coil support base 85 is formed as a flat surface, and two positioning projections 85a and 85a for positioning the flexible reinforcing plate 86 are provided on the upper surface. The two positioning projections 85a and 85a are arranged at a predetermined interval in the second direction Y, and the flexible reinforcing plate 86 positioned by the both positioning projections 85a and 85a is fixed to the upper surface of the coil support base 85. Yes. A flexible wiring board 87 having a predetermined electrical circuit printed and formed on the upper and lower surfaces thereof is fixed to the flexible reinforcing plate 86 by fixing means such as an adhesive tape.

  A flat coil 88 wound in a plane is mounted on the upper surface of the flexible reinforcing plate 86, and is electrically connected to a predetermined wiring pattern provided on the upper 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 flexible reinforcing plate 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 reinforcing plate 86, 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 flexible reinforcing 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. Further, 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. The first guide means, the second guide means, the first drive means, and the second drive means constitute a correction lens moving mechanism.

  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. 25, on the lower surface of the flexible reinforcing plate 86, a first hall element 94 showing a specific example of the first position detecting means and a first example showing a 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 unit 5 having the above-described configuration can be assembled as follows, for example. First, as shown in FIGS. 25 to 27, the flat coil 88 is fixed to one surface of the flexible reinforcing plate 86, and the cylindrical coil 91 is fixed to the surface to which the flexible wiring board 87 on the opposite side is connected. Thus, a coil assembly 93 in which the flexible reinforcing plate 86 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. Thereby, 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 flexible reinforcing plate 86 of the actuator 54 is placed on the upper surface of the coil support base 85 and positioned by the two positioning convex portions 85a and 85a. Then, the flexible reinforcing 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 73 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 unit 5 is completed, and the image blur correction unit 5 having the configuration as shown in FIGS. 18 to 22 is obtained.

  The operation of the image blur correction unit 5 having such a configuration is, for example, as follows. The movement of the correction lens 15 of the image blur correction unit 5 selectively or simultaneously supplies an appropriate value of drive current 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 unit 5 are fixed to the coil support base 85 via the flexible reinforcing plate 86 and further fixed to the fixed base 53 via the coil support base 85. 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.

  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 unit 5 having such a configuration and action is detachably attached to the lens device 1. The image blur correction unit 5 is inserted into and removed from the side of a unit housing 48 provided in the lower barrel 18 of the lens barrel 3 and is detachably attached to the lower barrel 18. As shown in FIG. 11, a boss portion 18a is provided at the lower edge of the unit housing portion 48 of the lower barrel 18 and screw holes are provided at two locations of the boss portion 18a. Fixing screws 49 are respectively screwed into the two screw holes of the boss portion 18a, and using these fixing screws 49, mounting boss portions 53c (provided at two locations in this embodiment) are boss portions. The fixing base 53 is attached to the lower barrel 18 by being fastened and fixed to 18a.

  As described above, since the image blur correction unit 5 of the present invention is configured as a single device, the correction lens 15 is attached to the unit storage unit 48 by simply mounting the image blur correction unit 5 on the predetermined unit. It can be positioned and attached in position. Therefore, not only can the attaching / detaching operation of the correction lens 15 be performed extremely easily and quickly, but also the position adjustment of the correction lens 15 can be made unnecessary, and the workability can be greatly improved. 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 to which the image blur correction unit 5 is attached 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, the light passes through the correction lens 15, passes through the optical filter 14, and reaches the imaging surface of the CCD 4. As a result, an image corresponding to the subject is formed on the imaging surface of the CCD 4.

  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 an inclined state like 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) 4, and records it 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 of the camera body 101, 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 of the camera body 101, the objective lens 7A is completely opened. At the same time, the power switch is turned on by the movement of the lens cover 108, so that photographing can be performed.

  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. A strap support fitting 123 is attached to the opposite end of the speaker hole 122.

  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. The switch holder 124 is held by the camera body 101 so that a part of the switch holder 124 is sandwiched between the front case 105 and the rear case 106.

  FIG. 31 is a block diagram illustrating the control concept of the image blur correction unit 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 correcting unit 5 having the configuration and operation as described above. The digital still camera 100 includes a lens device 1 having an image blur correction unit 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 unit 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 unit 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 unit 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 unit 5 to the drive control unit 152. The drive control unit 152 outputs a predetermined drive signal to the image blur correction unit 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, 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 correcting unit 5 having the configuration and operation as described above. The digital still camera 100A includes a lens device 1 having an image blur correcting unit 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 unit 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 a lens driving unit of the image blur correction unit 5 that drives and 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 unit 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 unit 5 to the correction lens control unit 165. The correction lens control unit 165 outputs a predetermined drive signal to the image blur correction unit 5 based on a 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 longitudinal direction of the yoke 66 (the same applies to the magnets 67a and 67b) is made to coincide with the longitudinal direction of the flat coil 88, and the yoke 66 to which the magnets 67a and 67b are fixed is attached to the first moving frame 51. Therefore, 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 example 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 in the same size, and the coil assembly 181 is formed by mounting the upper flat coil 182 on one surface of the flexible wiring board 184 and attaching the lower flat coil 183 to the other surface. It is configured. The upper flat coil 182 and the lower flat coil 183 are formed by arranging two coil portions each having an elliptical shape side by side. The upper flat coil 182 and the lower flat coil 183 are fixed to both the upper and lower surfaces of the flexible wiring board 184 with the coil portions 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.

  FIG. 34 shows a second example of the imaging apparatus of the present invention, and FIG. 35 shows a third example of the imaging apparatus of the present invention. The imaging apparatus according to the second embodiment of the present invention shown in FIG. 34 is applied to a video camera 200. The information storage medium of the video camera 200 may be a disk-shaped recording medium such as an optical disk, a magnetic disk, or a magneto-optical disk, or may be a tape-shaped recording medium such as a magnetic tape.

  As shown in FIG. 34, this video camera 200 houses a lens device 201 that takes an image of a subject as light and guides it to a CCD 4 as an imaging means, and the lens device 201 and other necessary devices and equipment. Camera body 202, display device 203 attached to the camera body 202 so that the posture can be changed, and video recording / playback for driving and controlling the information storage medium to read out pre-recorded information and to store new information And a control unit (not shown) that controls the operation of the lens device 201 and the video recording / playback unit 204 or the screen display of the display device 203.

  The lens device 201 has substantially the same configuration as the lens device 1 of the above-described embodiment. That is, the lens device 201 includes a lens barrel 206, a lens system housed in the lens barrel 206, an image blur correction unit 5 that is detachably attached to the lens barrel 206, and the like. Yes. The lens barrel 206 is shaped like a periscope, and a lens system is attached with the optical axis directed in the vertical direction. A lens group 206 includes a first lens group having a triangular prism of the lens system at the upper end of the lens barrel 206, and the objective lens 7A is placed in a state where the optical axis is directed horizontally on the front surface that is the side of the triangular prism. Has been placed. At the lower end of the lens barrel 206, a CCD 4 for converting an optical image of a subject supplied through the lens system into an electrical signal and outputting it is disposed.

  A bulging portion 207 that protrudes to the back side opposite to the objective lens 7A is provided at the lower portion of the lens barrel 206. The bulging portion 207 is provided with an opening opened on the back side, and a unit housing portion to which the image blur correction unit 5 is detachably attached is provided inside the opening. A power storage unit to which the power unit 205 is detachably attached is provided on the back side of the unit storage unit. The video recording / playback unit 204 is, for example, a disk drive device when the information storage medium is an optical disk, and a tape drive device (VTR mechanical deck) when the information storage medium is a magnetic tape.

  The camera body 202 is formed of a substantially rectangular casing set long in the vertical direction, and the objective lens 7A is exposed at the upper part of the front surface. A display device 203 is disposed on one side surface of the camera body 202, and is supported by a biaxial rotation shaft portion 209 attached to the upper portion of the camera body 202 so that the posture can be changed. The display device 203 includes a flat panel 211 such as a liquid crystal display or an organic EL panel, and a panel cover 212 that covers other portions while leaving the display surface of the flat panel 211. The panel cover 212 is provided with a power button, a shooting button, a camera shake setting button, and other necessary operation buttons 213. The panel cover 212 is attached to the camera body 202 by a biaxial rotation shaft portion 209 so that the posture can be changed in the biaxial direction.

  According to the video camera 200 having such a configuration, image blur caused by shaking or shaking of the camera body 202 can be always corrected by the action of the image blur correction unit 5 at the time of moving image shooting. Accordingly, it is possible to obtain a beautiful moving image with no image blur or with reduced image blur and to provide an imaging apparatus capable of obtaining such a moving image. In addition, only the image blur correction unit can be replaced, and the image blur correction unit can be easily and easily adjusted and repaired.

  In this embodiment, the bulging portion 207 of the lens barrel 206 in the lens device 201 is provided so as to protrude on the opposite side to the objective lens 7A, but it may be protruded on the same side as the objective lens 7A. Of course, it may be configured to project in a direction orthogonal to the objective lens 7A.

  The image pickup apparatus according to the third embodiment of the present invention shown in FIG. 35 is applied to a digital still camera 220. The digital still camera 220 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 image pickup device) 4 and records it on the semiconductor recording medium. It is a thing. The information storage medium of the digital still camera 220 is preferably a memory stick or other semiconductor recording memory, but may be a disk-shaped recording medium such as an optical disk, a magnetic disk, a magneto-optical disk, or a magnetic tape. The tape-shaped recording medium may be used.

  As shown in FIG. 35, the digital still camera 220 houses a lens device 221 that takes an image of a subject as light and guides it to a CCD 4 as an imaging means, and the lens device 221 and other necessary devices and equipment. A camera body 222, an electronic viewfinder 223 attached to the camera body 222, a video recording unit (not shown) for recording captured video, a power source unit such as a battery, and the operation of the lens device 221 and the video recording unit. It is comprised including the control apparatus etc. which control this.

  The camera body 222 is composed of a flat housing developed in the horizontal direction. The lens device 221 is arranged on one side in the horizontal direction, and the electronic viewfinder 223 is arranged on the other side in the horizontal direction. An eye cup 224 is disposed on the rear surface of the camera body 222 and behind the electronic viewfinder 223. The lens device 221 includes a lens barrel 225, a lens system housed in the lens barrel 225, an image blur correction unit 5 that is detachably attached to the lens barrel 225, and the like.

  The lens barrel 225 has a T shape, and a lens system is attached with the optical axis directed in the front-rear direction. At the upper end portion of the lens barrel 225, an objective lens 226 located at the tip of the lens system is disposed. At the lower end of the lens barrel 225, a CCD 4 for converting an optical image from the subject into an electrical signal and outputting it is disposed. On the side of the lens barrel 225, a bulging portion 227 that protrudes in a direction orthogonal to the optical axis of the lens system is provided. The bulge portion 227 is provided with an opening portion opened on the back side, and a unit housing portion to which the image blur correction unit 5 is detachably attached is provided inside the opening portion. A shutter button 229 is provided on the front side of the eye cup 224 of the camera body 222.

  According to the digital still camera 220 having such a configuration, image blur caused by shaking or shaking of the camera body 222 can be always corrected by the action of the image blur correction unit 5 during still image shooting. Accordingly, it is possible to obtain a beautiful still image with no image blur or with reduced image blur and to provide an imaging apparatus that can obtain such a still image. In addition, only the image blur correction unit can be replaced, and the image blur correction unit can be easily and easily adjusted and repaired.

  As described above, according to the lens apparatus and the imaging apparatus having the image blur correction unit of the present invention, the image blur correction unit is used for the first driving means by the set of magnetic circuit members including the magnet and the yoke. Since the magnetic circuit for the second driving means is used as the magnetic circuit, the number of parts can be reduced and the apparatus itself can be reduced in size and weight. As a result, it is possible to reduce the size and weight of the lens apparatus of the present invention to which the image blur correction apparatus is mounted and the entire imaging apparatus including the lens apparatus.

  The magnet for constituting the magnetic circuit member includes first position detecting means for detecting the position of the first guide means (first moving frame 51) and second guide means (second moving frame). 52) Since the structure is also used as a magnet for the second position detecting means for detecting the position, the number of parts can be further reduced.

  Further, the first and second position detecting means have first and second Hall elements that detect the position of the correction lens from the position of the magnet, and these first and second Hall elements are arranged on one substrate. Therefore, the space for arranging the first and second Hall elements can be reduced, and the image blur correction apparatus can be further downsized.

  In addition, the coil assembly including two coils and a flexible wiring board that supplies power to the two coils is fixed to the fixed base, and the yoke and the magnet are fixed to the first moving frame. The correction lens can be moved by applying a thrust generated by passing an electric current to the yoke and the magnet. As a result, the coil assembly, that is, the flexible wiring board can be fixed in a certain place, 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 thrust for moving 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 the first embodiment of the present invention, 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 the correction lens (fifth lens group) of the image blur correction unit. Therefore, when the image pickup apparatus is in a 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. Will be in contact. 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 unit 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 hand shake acceleration of about 1 G (gravity acceleration) due to the weight of the first and second moving frames. It can also handle camera shake.

  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.

1 is a perspective view of a lens device according to a first embodiment of the present invention, 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 embodiment 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. FIG. 7 is a diagram illustrating a second example of the imaging apparatus according to the present invention and is a cross-sectional view illustrating a main part applied to a video camera. FIG. 9 is a diagram illustrating a third example of the imaging apparatus according to the present invention and is a cross-sectional view illustrating a main part applied to a digital still camera.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,201,221 ... Lens apparatus, 2 ... Lens system, 3,206,225 ... Lens barrel, 4 ... CCD (imaging means), 5 ... Image blur correction unit, 7 ... Group lens, 7A, 226 ... Objective Lens: 7B: Prism, 8: 2nd group lens, 9 ... 3rd group lens, 10 ... 4th group lens, 11 ... 5th group lens, 15 ... Correction lens, 16 ... Upper barrel, 17 ... Intermediate barrel, 18 ... Lower Lens barrel, 18a ... boss portion, 48 ... unit housing portion, 51 ... first moving frame, 51a ... lens fixing portion, 51b ... yoke fixing portion, 52 ... second moving frame, 53 ... fixed base, 53a ... moving Frame support part, 53b ... Coil fixing part, 54 ... Actuator, 58 ... Fitting hole, 61 ... First main bearing part, 62 ... First sub-bearing part, 63 ... First main guide shaft, 64 ... Bearing Groove, 65 ... 1 sub guide shaft, 66, 185 ... yoke, 66a ... upper piece, 66b ... lower piece, 66c ... connecting piece, 67a, 67b, 186 ... magnet, 68 ... through hole, 71 ... second main bearing part, 72 ... Second sub-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, 81 DESCRIPTION OF SYMBOLS ... Through-hole, 82 ... 4th main bearing part, 83 ... 4th sub bearing part, 85 ... Coil support stand, 86 ... Flexible reinforcement board, 87,184 ... Flexible wiring board, 88, 182, 183 ... Flat coil 88a, 88b ... Coil part, 89a, 89b, 92 ... Thrust generating part, 91 ... Cylindrical coil, 93, 181 ... Coil assembly, 94 ... First hall element, 95 ... Second hall element, 96 ... Thermistor, 10 , 100A ... Digital still camera (imaging device), 101, 202, 222 ... Camera body, 102, 163, 203 ... Display device, 105 ... Front case, 106 ... Rear case, 202 ... Video camera (imaging device), 207, 227 ... bulge part, 220 ... digital still camera (imaging device)

Claims (4)

A lens system in which a plurality of lenses are arranged on the optical axis so that their optical axes coincide with each other;
A lens barrel that supports the plurality of lenses in a fixed or movable manner;
A correction lens moving mechanism for moving in a direction orthogonal to the optical axis of the lens system,
It is possible to correct image blur obtained through the lens system by moving the correction lens in the orthogonal direction according to the shaking of the lens barrel,
The correction lens moving mechanism is
A first moving frame that supports the correction lens;
A second moving frame that movably supports the first moving frame via first guide means for guiding in a first direction orthogonal to the optical axis;
A fixed base that movably supports the second moving frame via second guide means that guides in a second direction that is perpendicular to the optical axis and is also perpendicular to the first direction;
First driving means for moving the first moving frame along the first guide means;
Second driving means for moving the second moving frame along the second guide means,
The first driving means and the second driving means are composed of two coils, a magnet for applying a magnetic force to the two coils, and a yoke for supporting the magnet.
The two coils are arranged so as to overlap each other so that the thrust generation part of each coil is directed to the first direction and the second direction by the action of the magnetic force of the magnet,
An image blur correction unit is configured by unitizing the correction lens and the correction lens moving mechanism,
A lens device in which the lens barrel is provided with a unit housing portion in which the image blur correction unit can be detachably attached. The lens apparatus according to claim 1, wherein the unit storage portion is provided to be opened in a direction orthogonal to the optical axis, and the image blur correction unit is configured to be able to be taken in and out from a horizontal direction with respect to the unit storage portion. The lens apparatus according to claim 1, wherein the lens barrel is provided with a bulging portion protruding in a direction perpendicular to the optical axis, and the bulging portion is provided with an opening of the unit storage portion. A lens system having a lens system in which a plurality of lenses are arranged on the optical axis so that their optical axes coincide with each other, and a lens barrel that supports the plurality of lenses so as to be fixed or movable;
A correction lens movable in a direction orthogonal to the optical axis of the lens system;
A correction lens moving mechanism for moving the correction lens in a direction orthogonal to the optical axis,
It is possible to correct image blur obtained through the lens system by moving the correction lens in the orthogonal direction according to the shaking of the lens device,
The correction lens moving mechanism is
A first moving frame that supports the correction lens;
A second moving frame that movably supports the first moving frame via first guide means for guiding in a first direction orthogonal to the optical axis;
A fixed base that movably supports the second moving frame via second guide means that guides in a second direction that is perpendicular to the optical axis and is also perpendicular to the first direction;
First driving means for moving the first moving frame along the first guide means;
Second driving means for moving the second moving frame along the second guide means,
The first driving means and the second driving means are composed of two coils, a magnet for applying a magnetic force to the two coils, and a yoke for supporting the magnet.
The two coils are arranged so as to overlap each other so that the thrust generation part of each coil is directed to the first direction and the second direction by the action of the magnetic force of the magnet,
An image blur correction unit is configured by unitizing the correction lens and the correction lens moving mechanism,
An image pickup apparatus, comprising: a unit housing portion in which the image blur correction unit can be detachably attached to the lens barrel.

Images