JP2015121595A - Image shake correction device and optical device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve shock resistance in a state in which an optical member for correcting an image shake is retreated from onto an optical axis.SOLUTION: An image shake correction device includes: a third group lens 2 correcting an image shake; a third group holder 3 holding the third group lens 2; a third group frame 8 supporting the third group lens 2 between a photographic position and a retreat position so that the third group lens 2 is rotatable in a R direction, and correcting an image shake of a subject image formed on an imaging element 30 through a photographic optical system including the third group lens 2 at the photographic position by moving in a P direction and a Q direction in plane orthogonal to an optical axis of the third group holder 3; a second group lens 25 arranged adjacent to the third group lens 2; and a photographic-time abutment member 17 arranged on a second group lens 25-side of the third group holder 3 when the third group lens 2 is at the photographic position, and moving in the P direction, Q direction, and R direction integrally with the third group lens 2, the photographic-time abutment member 17 including a photographic-time abutment portion 17 more protruding toward the second lens 25 than a second group lens 25-side surface of the third group lens 2 in an optical axis direction.

Description

  The present invention relates to an image blur correction device mounted on an optical apparatus such as an imaging device such as a digital camera or a digital video camera, an interchangeable lens for a digital single lens reflex camera, a binocular, a telescope, a field scope, and the like. The present invention relates to an optical apparatus including a shake correction apparatus.

  Many recent imaging devices such as digital cameras are equipped with an image blur correction device for suppressing image blur during shooting. As such an image blur correction device, by moving a correction lens incorporated in the imaging optical system or a holding member that holds the imaging element in a first direction and a second direction in a plane orthogonal to the optical axis, A technique for reducing image blur caused by camera shake during shooting is known.

  For example, in the imaging apparatus described in Patent Document 1, the holder member that holds the correction lens can be moved in the first direction in the plane orthogonal to the optical axis by the first guide unit, and the second guide unit. Thus, it is possible to move in the second direction orthogonal to the optical axis and the first direction. Then, when the lens barrel is retracted, the holder member is retracted from the optical axis by the third guide member that moves the holder member in the third direction in the plane orthogonal to the optical axis and the retracting position control cam. Another lens group is accommodated in the space occupied by the holder member during photographing. Thereby, size reduction of the imaging device when the lens barrel is in the retracted state is achieved.

JP 2012-141401 A

  However, in the technique described in Patent Document 1, the correction lens and the holder member are cantilevered with respect to the rotation shaft provided in parallel with the optical axis, and the third lens is mounted on the optical axis. It is configured to move in the direction. Therefore, when an impact is applied to the imaging device, the correction lens and the holder member move in the optical axis direction and come into contact with another lens group and its holding member that are close to each other. There is a risk of scratching the group. Further, the holder member that holds the correction lens and the holding member that holds another lens group may be damaged.

  An object of the present invention is to provide an image blur correction device with improved impact resistance in a state in which a holding member that holds an optical member that corrects image blur is retracted from the optical axis.

  An image blur correction apparatus according to the present invention includes a fixing member, a first optical member that corrects image blur, a first holding member that holds the first optical member, and the first holding member. The first optical member is rotatably supported in a first direction within a plane orthogonal to the optical axis between a photographing position positioned on the optical axis and a retracted position retracted from the optical axis. The image blur of the subject image formed on the image sensor through the imaging optical system including the first optical member arranged at the imaging position is supported by the fixed member in the second direction in the plane orthogonal to the optical axis. A frame member to be corrected by moving; a driving means for driving the frame member together with the first holding member in the second direction; and an urging force for biasing the first holding member toward the photographing position. The biasing member and the biasing force of the biasing member When the retracting drive member that moves the first holding member to the retracted position, the second optical member disposed adjacent to the first optical member, and the first optical member are at the photographing position The first holding member is disposed in a range overlapping with the second optical member when viewed from the optical axis direction on the second optical member side, and is integrated with the first optical member in the first direction. And a shooting contact member that moves in the second direction, the shooting contact member in the optical axis direction than the surface of the first optical member closer to the second optical member. It has the contact part at the time of imaging | photography projected to the 2nd optical member side, It is characterized by the above-mentioned.

  According to the present invention, the impact resistance of the image blur correcting device is enhanced, and the image blur correcting optical member at the retracted position from the optical axis and its holding member, the other optical system on the optical axis, and its holding member. It is possible to improve the reliability of the image blur correction apparatus by preventing the occurrence of damage due to contact with the image blur.

It is the perspective view which looked at the digital camera concerning the embodiment of the present invention from the front side (subject side). It is the perspective view which looked at the lens barrel with which the digital camera of FIG. 1 is provided from the front side. FIG. 3 is a cross-sectional view including an optical axis when the lens barrel of FIG. 2 is at a photographing position. It is sectional drawing containing an optical axis when the lens-barrel of FIG. 2 exists in a retracted position. It is the perspective view which looked at the image blurring correction apparatus which concerns on embodiment of this invention from the front side. It is the perspective view which looked at the image blurring correction apparatus shown in FIG. 5 from the back side (imaging surface side). It is the disassembled perspective view which looked at the image blurring correction apparatus of FIG. 5 from the front side. It is the disassembled perspective view which looked at the image blurring correction apparatus of FIG. 5 from the back side. FIG. 6 is a front view of the image blur correction device when a third group holder constituting the image blur correction device of FIG. 5 is at a photographing position. FIG. 6 is a front view of the image blur correction apparatus when a third group holder constituting the image blur correction apparatus in FIG. 5 is in a retracted position. FIG. 10 is a perspective view showing a relationship between the third group holder and the third group lever when the third group holder shown in FIG. 9 is at the photographing position. FIG. 10 is a perspective view showing the relationship between the third group holder and the third group lever when the third group holder shown in FIG. 9 is in the retracted position. FIG. 6 is a side view of a third group unit including the image blur correction device of FIG. 5. It is 1st sectional drawing of arrow AA shown in FIG. It is 2nd sectional drawing of arrow AA shown in FIG. It is 1st sectional drawing of arrow BB shown in FIG. It is 2nd sectional drawing of arrow BB shown in FIG. It is sectional drawing which shows the relationship between a 3rd group holder and a 3rd group lever when the 3rd group holder shown in FIG. 9 exists in an imaging | photography position. FIG. 3 is a cross-sectional view of the image blur correction device when the lens barrel of FIG. 2 is at a shooting position. FIG. 3 is a cross-sectional view of the image blur correction device when the lens barrel of FIG. 2 is at an intermediate position between a photographing position and a retracted position. It is sectional drawing of an image blur correction apparatus when the lens barrel of this is in a retracted position. FIG. 3 is a cross-sectional view of the image blur correction device when the lens barrel of FIG. 2 is at a shooting position. FIG. 3 is a cross-sectional view showing a relationship between a third group holder and a third group lever when an impact is applied when the lens barrel of FIG. 2 is at a photographing position. It is sectional drawing which shows the relationship between the 3rd group ground plane pin in the image blurring correction apparatus of FIG. 5 and the 3rd group ground plane pin movable space provided in the 3rd group frame. It is CC sectional view taken on the line shown in FIG. FIG. 6 is a front perspective view illustrating a configuration of a third group mask included in the image blur correction device of FIG. 5. FIG. 6 is a rear perspective view of the second group holder provided in the image blur correction device of FIG. 5 and the structure around it. It is a schematic sectional drawing which simplifies and shows the sectional view of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Here, a so-called compact type digital camera is taken up as an example of an optical apparatus provided with the image blur correction apparatus according to the present invention. However, the present invention is not limited to this.

  FIG. 1 is a perspective view of a digital camera according to an embodiment of the present invention as viewed from the front side (subject side). FIG. 2 is a perspective view of the lens barrel provided in the digital camera of FIG. 1 as seen from the front side.

  The digital camera according to the present embodiment has a structure in which a retractable zoom lens barrel 100 (hereinafter referred to as “lens barrel 100”) is disposed on the front side of the camera body 101. The zoom driving unit 31 performs the extending operation / retracting operation of the lens barrel 100.

  The lens barrel 100 is moved from the retracted position to the photographing position by the extension operation, so that various lenses constituting the lens barrel 100 are arranged on the optical axis (photographing optical axis), thereby enabling photographing with a digital camera. It becomes possible. When the lens barrel 100 is at the photographing position, the photographing magnification can be changed by controlling the positions of the various lenses on the optical axis. When the power of the digital camera is turned off, the lens barrel 100 is retracted, and the lens barrel 100 moves from the photographing position to the retracted position.

  FIG. 3 is a cross-sectional view including the optical axis when the lens barrel 100 is at the photographing position. FIG. 4 is a cross-sectional view including the optical axis when the lens barrel 100 is in the retracted position.

  The lens barrel 100 includes a first group lens 23, a first group holder 24a that holds the first group lens 23, a first group barrel 24b that holds the first group holder 24a, and a third group lens 2 (first optical member). And a third group holder 3 that holds the third group lens 2. The lens barrel 100 includes a second group lens 25 (second optical member) disposed adjacent to the third group lens 2, a second group holder 26 that holds the second group lens 25, and a fourth group lens 27. And a fourth group holder 28 for holding the fourth group lens 27.

  The first group lens 23, the first group holder 24a, and the first group barrel 24b constitute a first group unit. The second group lens 25 and the second group holder 26 constitute a second group unit. The third group lens 2 and the third group holder 3 constitute a third group unit. The fourth group lens 27 and the fourth group holder 28 constitute a fourth group unit. The first group lens 23, the second group lens 25, the third group lens 2, and the fourth group lens 27 constitute a photographing optical system of the lens barrel 100.

  In the lens barrel 100, the inner cam barrel 20 holds a rectilinear barrel 21 on its inner circumference so as to be relatively rotatable. A follower 20f, an inner cam cover engaging portion 20g, and a drive key 20h are provided on the outer peripheral portion of the inner cam cylinder 20 at three substantially equal intervals in the circumferential direction (see FIGS. 19 and 20). A fixed tube 22 is disposed on the outermost periphery of the lens barrel 100, and cam grooves 22a are formed at three locations at substantially equal intervals in the circumferential direction on the inner periphery of the fixed tube 22.

  An outer cam cylinder 34 is disposed inside the fixed cylinder 22. The three cam grooves 22a provided on the inner side of the fixed cylinder 22 are respectively engaged with the outer peripheral portion of the outer cam cylinder 34 at three positions substantially equally spaced in the circumferential direction. The zoom drive unit 31 rotationally drives the outer cam cylinder 34. Therefore, when the outer cam cylinder 34 is rotationally driven by the zoom drive unit 31, it moves in the optical axis direction along the lift of the cam groove 22a while rotating with respect to the fixed cylinder 22.

  An outer rectilinear cylinder 35 is disposed inside the outer cam cylinder 34. Nine bayonet claws (not shown) that engage with a circumferential groove 34b formed in the inner peripheral portion of the outer cam cylinder 34 are provided on the outer peripheral portion of the outer rectilinear cylinder 35 in the circumferential direction and the optical axis direction. . Further, a rectilinear key (not shown) that engages with the rectilinear key groove 22 b of the fixed cylinder 22 is provided on the outer peripheral portion of the outer rectilinear cylinder 35. Therefore, the outer rectilinear cylinder 35 moves linearly in the optical axis direction along the rectilinear key groove 22b as the outer cam cylinder 34 rotates.

  An inner cam cover 33 is disposed inside the outer rectilinear cylinder 35. The inner cam cover 33 has three engagement pawls (not shown) that engage with the inner cam cover engaging portion 20g of the inner cam cylinder 20 and three detents that engage with the drive key 20h of the inner cam cylinder 20. (Not shown) is provided. The drive key 20 h provided on the inner cam cylinder 20 is engaged with three key grooves (not shown) provided on the inner peripheral portion of the outer cam cylinder 34. As a result, the inner cam cylinder 20 rotates around the optical axis in the same phase as the outer cam cylinder 34, and the inner cam cover 33 rotates about the optical axis integrally with the inner cam cylinder 20 as the inner cam cylinder 20 rotates. While moving in the optical axis direction.

  A rectilinear plate 19 is integrally attached to the rectilinear cylinder 21. The rectilinear plate 19 is provided with a rectilinear key 19a (see FIGS. 19 and 20) that engages with a rectilinear key groove 35a provided on the inner periphery of the outer rectilinear cylinder 35. The rectilinear cylinder 21 is provided with a first group guide key 21b, a second group guide groove (not shown), and a third group guide groove 21d. Further, the rectilinear cylinder 21 has a retraction introduction surface 21e (see FIGS. 19 and 20) that contacts the third group lever 6 (see FIGS. 6 to 8), and a retraction completion surface 21f (see FIGS. 19 to 21) that contacts the third group lever 6. And a flange 21g (see FIGS. 19 and 20). The rectilinear cylinder 21 is held by the flange 21g and the rectilinear plate 19 so that the inner cam cylinder 20 is rotatable about the optical axis, and moves integrally with the inner cam cylinder 20 in the optical axis direction.

  A first group follower (not shown) is provided at six locations at substantially equal intervals in the circumferential direction on the inner periphery of the first group barrel 24b. These six first-group followers are respectively engaged with six first-group cam grooves 20d provided on the outer peripheral portion of the inner cam cylinder 20, and are guided by the first-group guide key 21b of the rectilinear cylinder 21, The first group holder 24a and the first group barrel 24b are moved forward and backward in the optical axis direction integrally.

  On the outer periphery of the second group holder 26, a second group follower (not shown) is provided at three locations at substantially equal intervals in the circumferential direction. These two second group followers are respectively engaged with three second group cam grooves 20c provided on the inner peripheral portion of the inner cam cylinder 20, and are guided by a second group guide groove (not shown) of the rectilinear cylinder 21. Thus, the second group holder 26 is supported so as to be able to advance and retract in the optical axis direction. The second group holder 26 has a light shielding flange 26 b disposed between the second group follower and the second group lens 25. The light shielding flange 26b shields light that passes between the outer periphery of the second group lens 25 and the inner periphery of the rectilinear cylinder 21 and that travels in the optical axis direction from the subject side toward the imaging plane side.

  The lens barrel 100 includes a sensor holder 29 that is attached to the camera body 101 and supports the fixed barrel 22, the image sensor 30, the zoom drive unit 31, and the focus drive unit (not shown). The focus driving unit performs a focusing operation by moving the fourth group holder 28 holding the fourth group lens 27 forward and backward in the optical axis direction.

  Next, an image blur correction apparatus incorporated in the lens barrel 100 will be described.

  FIG. 5 is a perspective view of the image blur correction apparatus according to the embodiment of the present invention as viewed from the front side. FIG. 6 is a perspective view of the image blur correction device as viewed from the back side (image forming surface side). FIG. 7 is an exploded perspective view of the image blur correction apparatus as viewed from the front side. FIG. 8 is an exploded perspective view of the image blur correction apparatus viewed from the back side.

  The image blur correcting apparatus includes a third group holder 3, a holder shaft 5, a third group base plate 9, a third group lever 6, a third group lever shaft 7, a third group frame 8, a holder torsion spring 4, a sub yoke shown in FIGS. 15, a third group ground plate pin 16, a third group mask 17, a lever torsion spring 18, and a third group flexible substrate 11. In the present embodiment, the image blur correction device is provided in a third group unit including the third group lens 2 and its peripheral members.

  The third group lens 2 corresponds to an example of an optical member that corrects image blur in the present invention. The third group holder 3 corresponds to an example of a first holding member in the present invention. It corresponds to an example of a retracting drive member in the present invention. The third group base plate 9 corresponds to an example of a fixing member in the present invention, the third group frame 8 corresponds to an example of a frame member in the present invention, and the holder torsion spring 4 corresponds to an example of an urging member in the present invention. The third group mask 17 corresponds to an example of a photographing contact member in the present invention.

  FIG. 9 is a front view of the image blur correction apparatus when the third group holder 3 is at the photographing position. FIG. 10 is a front view of the image blur correction apparatus when the third group holder 3 is in the retracted position. FIG. 11 is a perspective view showing the relationship between the third group holder 3 and the third group lever 6 when the third group holder 3 is at the photographing position. FIG. 12 is a perspective view showing the relationship between the third group holder 3 and the third group lever 6 when the third group holder 3 is in the retracted position.

  FIG. 13 is a side view of the third group unit having the image blur correction device. FIG. 14 is a first cross-sectional view taken along the line AA shown in FIG. 13, and is a diagram illustrating a relationship between the third group holder 3 and the third group lever 6 when the third group holder 3 is at the photographing position. is there. FIG. 15 is a second cross-sectional view taken along the line AA shown in FIG. 13, and the third group holder 3, the third group lever 6, and the third group ground plate pin 16 when the third group holder 3 is in the retracted position. It is a figure which shows the relationship. FIG. 16 is a first cross-sectional view taken along the line BB in FIG. 13, and the third group holder 3, the third group lever 6, and the third group ground plate pin 16 when the third group holder 3 is in the photographing position. It is a figure which shows the relationship. FIG. 17 is a second cross-sectional view taken along the line BB shown in FIG. 13 and is a diagram showing a relationship between the third group holder 3 and the third group lever 6 when the third group holder 3 is in the retracted position. is there. FIG. 18 is a cross-sectional view showing the relationship between the third group holder 3 and the third group lever 6 when the third group holder 3 is in the photographing position.

  FIG. 19 is a cross-sectional view of the image blur correction apparatus when the lens barrel 100 is at the photographing position. FIG. 20 is a cross-sectional view of the image blur correction apparatus when the lens barrel 100 is at an intermediate position between the photographing position and the retracted position. FIG. 21 is a cross-sectional view of the image blur correction apparatus when the lens barrel 100 is in the retracted position.

  FIG. 22 is a cross-sectional view of the image blur correction apparatus when the lens barrel 100 is at the photographing position. FIG. 23 is a cross-sectional view showing the relationship between the third group holder 3 and the third group lever 6 when an impact is applied when the lens barrel 100 is at the photographing position. FIG. 24 is a cross-sectional view showing the relationship between the third group ground plane pin 16 and the third group ground plane pin movable space 8f1 provided in the third group frame 8 in the image blur correction apparatus. 25 is a cross-sectional view taken along the line CC in FIG. FIG. 26 is a front perspective view showing the configuration of the third group mask 17 provided in the image blur correction apparatus. FIG. 27 is a rear perspective view of the second group holder 26 provided in the image blur correction apparatus and the surrounding structure. FIG. 28 is a schematic cross-sectional view showing the cross-sectional view of FIG. 22 in a simplified manner.

  The holder shaft 5 (FIGS. 5, 7 to 10) is press-fitted into a sleeve 3b (FIGS. 16 to 18) provided in the third group holder 3 so as to be parallel to the optical axis. The third group holder 3 holding the third group lens 2 is supported by a bearing 8a (FIG. 18) of the third group frame 8 via a holder shaft 5 so as to be rotatable between a photographing position and a retracted position, and image blur correction is performed. Sometimes it moves in a plane perpendicular to the optical axis integrally with the third group frame 8.

  The third group frame 8 includes three ball receiving surface portions 8b (FIGS. 3, 11, and 12) that are in contact with the three balls 13 (FIGS. 3, 7, and 8) and three thrust springs 14 (FIGS. 7 and 8). Are provided with three spring hooks 8c (FIGS. 10 to 12). In addition, the third group frame 8 includes a pair of magnets 8d (FIGS. 10 to 12) that are spaced apart from each other by 90 ° in the circumferential direction within a plane perpendicular to the optical axis, and a stopper portion 3a (third group holder 3). A contact surface 8e (FIGS. 9, 14, and 15) against which FIGS. 9 and 14 abut is provided.

  The third group frame 8 is provided with a third group ground plane pin movable space 8f1 and an optical axis direction position regulating wall 8f2 (FIGS. 11 and 12). The third group ground plane pin movable space 8f1 is provided so as not to interfere with the third group frame 8 even when the third group ground plane pin 16 (FIGS. 11 and 12) moves in a direction perpendicular to the optical axis during imaging (FIG. 24). ). The optical axis direction position regulating wall 8f2 comes into contact with the third group base plate pin 16 when an impact is applied and the third group frame 8 moves away from the third group base plate 9 in the direction of the optical axis (FIG. 24).

  A holder torsion spring 4 (FIGS. 7, 8, 14, and 15) is externally attached to a sleeve 3 b provided in the third group holder 3. The holder torsion spring 4 is arranged such that the stopper portion 3a of the third group holder 3 comes into contact with the contact surface 8e of the third group frame 8 from the retracted position of the third group holder 3 to the photographing position of the third group holder 3. The holder 3 is biased against the third group frame 8 (FIGS. 9 and 14).

  A shutter unit 32 (FIGS. 7, 8 and 19) is attached to the third group base plate 9. The shutter unit 32 includes a pair of shutter blades 32a and 32b (FIGS. 3, 7, and 8) and a shutter driving device 32c (FIG. 8). The shutter blades 32a and 32b are rotatably supported by the shutter unit 32, and are driven by a shutter driving device 32c to move between a position where the light path is shielded and a position where the light path is retracted in a plane perpendicular to the optical axis. As a result, the subject luminous flux imaged on the image sensor 30 is adjusted.

  The third group base plate 9 is provided with three spring hooks 9b on which the other ends of the three thrust springs 14 are hooked (FIGS. 16 and 17). The three balls 13 are held between the ball receiving surface portion 8b of the third group frame 8 and the ball hole 9a (FIGS. 3 and 16) of the third group base plate 9 by the urging force of the thrust spring 14, respectively. It is stored so as to be able to roll in a plane orthogonal to (FIG. 22).

  Further, on the third group base plate 9, a pair of coils 9c (FIGS. 8 and 9) disposed in the same phase as the pair of magnets 8d (FIGS. 8 and 9), a bearing 9d (FIG. 18) for supporting the third group lever shaft 7 parallel to the optical axis. ) A photographing position contact surface (not shown) of the third group lever 6 is provided. When the pair of coils 9c are energized, Lorentz force is generated between the pair of magnets 8d. Within the range in which the mechanical ends 8g, 8h (FIG. 11) of the third group frame 8 abut on the mechanical ends 9g, 9h (FIG. 14) of the third group base plate 9 in the plane orthogonal to the optical axis by this Lorentz force. The frame 8 is supported so as to be movable with respect to the third group base plate 9.

  A pair of Hall elements 10 (FIG. 8) is mounted on the third group flexible substrate 11. The pair of Hall elements 10 are disposed at positions facing the pair of magnets 8d in the optical axis direction, and are held by the Hall sensor holder 12 (FIGS. 5, 7, and 8). The hall sensor holder 12 is fixed to the third group base plate 9. The hall element 10 detects a change in the direction and size of the magnetic force of the pair of magnets 8d, and a control unit (not shown) provided in the camera body 101 based on the detection result causes the third group frame with respect to the hall sensor holder 12 to move. The position of 8 is obtained.

  At that time, the control unit controls the voltage applied to the pair of coils 9c based on image blur information of a gyro sensor (not shown) provided in the camera body 101, and the third group frame in a plane orthogonal to the optical axis. Move 8 Thus, by moving the third group holder 3 holding the third group lens 2 in the direction for correcting the image blur, the image blur due to the vibration of the subject image formed on the image sensor 30 through the photographing optical system is corrected. Thus, images and videos without image blur can be obtained.

  The third group holder 3 is provided with a retracting contact surface 3c (FIG. 11). The third group lever 6 is provided with a fitting hole 6a (FIG. 11) for fitting with the third group lever shaft 7 and a retracting contact pin 6b (FIG. 11) for contacting the retracting contact surface 3c of the third group holder 3. It has been. Further, the third group lever 6 includes a retreat slope 6c (FIGS. 11 and 12) that contacts the retraction introduction surface 21e (FIGS. 19 and 20) of the rectilinear cylinder 21, and a retreat completion surface 21f (FIGS. 19 to 20) of the rectilinear cylinder 21. 21d (FIGS. 11 and 12) is provided which comes into contact with 21). A third group mask 17 (FIGS. 9 and 10) is integrally attached to the subject side of the third group holder 3. Details of the third group mask 17 will be described later.

  The third group lever 6 is supported by a bearing 9d (FIG. 18) of the third group base plate 9 so as to be rotatable about the third group lever shaft 7. The third group lever 6 is brought into contact with the photographing position of the third group base plate 9 in the direction of the photographing position by a lever torsion spring 18 (FIGS. 7, 8, and 16 to 18) attached around the third group lever shaft 7. It is urged to contact a surface (not shown).

  The arrangement of the image blur correction device inside the lens barrel 100 will be described. On the outer periphery of the third group base plate 9, followers 9e (FIGS. 3, 5, and 6) are provided at three locations at substantially equal intervals in the circumferential direction. Each of these three followers 9e engages with three cam grooves 20a (FIG. 3) formed in the inner peripheral portion of the inner cam cylinder 20, and is guided by the guide grooves 21d of the rectilinear cylinder 21. As a result, the third group base plate 9 is supported so as to be able to advance and retreat in the optical axis direction with respect to the inner cam cylinder 20 and the rectilinear cylinder 21, and as a result, the image blur correction device is supported so as to be able to advance and retract in the optical axis direction.

  The diameter or outer shape of the first group holder 24a when viewed from the image plane side in the optical axis direction is larger than the diameter or outer shape of the second group lens 25 viewed from the subject side in the optical axis direction. Therefore, the first group holder 24a is disposed on the subject side in the optical axis direction so as to face the image blur correction device with the light shielding flange 26b of the second group holder 26 interposed therebetween. In other words, the subject side of the image blur correction device is restricted to the first group holder 24 a via the second group holder 26.

  Further, the shutter blades 32a and 32b provided in the shutter unit 32 rotate within a traveling space on a substantially plane perpendicular to the optical axis for adjusting the light amount. Then, the third group holder 3, the third group lever 6 and the third group frame 8 are moved in a plane orthogonal to the optical axis in order to correct the image blur and to retract the third group lens 2 (FIGS. 16 and 17). . Therefore, if the shutter blades 32a and 32b, the third group holder 3, the third group lever 6 and the third group frame 8 are arranged at positions overlapping in the optical axis direction, the movement of each component is hindered.

  Therefore, in the present embodiment, the shutter unit 32 is disposed at a position where it does not interfere with the third group holder 3, the third group lever 6, and the third group frame 8 on the image plane side in the optical axis direction of the image blur correction apparatus. . As a result, the image blur correction device is regulated on the image plane side in the optical axis direction by a substantially planar traveling space orthogonal to the optical axis of the shutter blades 32a and 32b.

  As described above, the image blur correction apparatus is configured such that the subject side in the optical axis direction is regulated by the first group holder 24a via the second group holder 26, and the image plane side in the optical axis direction is regulated by the shutter unit 32. It is arranged in a substantially cylindrical space centered on the optical axis.

  An example of the operation of the image blur correction apparatus when the lens barrel 100 is retracted from the photographing position to the retracted position will be described mainly with reference to FIGS. When the lens barrel 100 is at the photographing position shown in FIG. 19, the third group holder 3 that holds the third group lens 2 is disposed at the photographing position on the optical axis of the lens barrel 100 (FIGS. 11, 14, etc.). . At this time, the third group lever 6 is held in an anti-vibration interference avoiding space 3d (FIG. 16) in which the retreat contact pin 6b does not contact the retreat contact surface 3c of the third group holder 3. Thus, during the image blur correction operation, the third group holder 3 can move in a plane perpendicular to the optical axis integrally with the third group frame 8.

  As shown in FIG. 20, when the lens barrel 100 starts to be retracted from the photographing position to the retracted position, the inner cam cylinder 20 rotates and followers 9 e provided at three locations on the outer periphery of the third group base plate 9. It moves in the direction approaching the straight cylinder 21 along the cam groove 20a. With this operation, when the retreat slope 6c of the third group lever 6 contacts the retraction introduction surface 21e of the rectilinear cylinder 21, the third group lever 6 is centered on the third group lever shaft 7 against the biasing force of the lever torsion spring 18. And the retracting contact pin 6b contacts the retracting contact surface 3c of the third group holder 3. Further, by the rotation of the third group lever 6, the third group holder 3 moves outside the optical axis against the urging force of the holder torsion spring 4.

  When the lens barrel 100 is in the retracted position shown in FIG. 21, the third group base plate 9 moves straight along the optical axis until the retreat completion surface 6d of the third group lever 6 contacts the retreat completion surface 21f of the straight advance cylinder 21. Then, the third group holder 3 moves to the retracted position (FIG. 17). The operation of the image blur correction apparatus when the lens barrel 100 is extended from the retracted position to the photographing position is reversed from the state of FIG. 21 to the state of FIG. 19 through the state of FIG.

  In the lens barrel 100, the second group lens 25 is held in the space occupied by the third group holder 3 in the third group frame 8 at the photographing position by moving the third group holder 3 to the retracted position outside the optical axis. The second group holder 26 is accommodated (FIG. 4). Thereby, it is possible to reduce the thickness in the optical axis direction when the lens barrel 100 is retracted.

  Next, the configuration and function of the third group mask 17 will be described mainly with reference to FIGS. As shown in FIGS. 25, 26, and 28, the third group mask 17 includes a photographing contact portion 17a and a flat portion 17b, and the third group lens 2 protrudes toward the subject side from the flat portion 17b. It has a group lens convex part 2e. As shown in FIG. 28, the shooting contact portion 17a has a convex shape that protrudes closer to the subject side than the third group lens convex portion 2e located on the flat surface portion 17b. These are arranged in a range overlapping with the second group lens 25 when viewed from the optical axis direction.

  FIG. 25 shows a third group lens convex portion movement range 2f that is a movement locus of the third group lens convex portion 2e. That is, the third group frame 3 is moved in the R direction (first direction) in which the third group holder 3 moves between the photographing position and the retracted position around the holder shaft 5. The movement locus of the third lens group convex portion 2e when moving in the P direction and Q direction (second direction that is the image blur correction direction) orthogonal to the axis is the third lens group convex portion movement range 2f.

  The photographing contact portion 17a is arranged around or within the third group lens convex portion movement range 2f. That is, at least a part of the photographing contact portion 17a is provided on the movement locus of the third lens group 2 in the R direction (first direction). In the photographing contact portion movement range 17c shown in FIG. 25, the third group frame 8 moves to the third group ground plane while the third group holder 3 moves in the R direction between the photographing position and the retracted position around the holder shaft 5. 9 shows a movement locus in which the shooting contact portion 17a moves by moving in the P direction and the Q direction (second direction) with respect to 9.

  On the other hand, as shown in FIG. 27, the second group holder 26 protrudes toward the image forming surface side of the second group lens 25 (the side facing the third group lens 2 in the optical axis direction), and the second group lens 25 is fixed. Claws 26c are provided at three locations. In the second group holder 26, the range where the crimping claw 26c is not formed on the image plane side with respect to the second group lens 25 is a crimping claw exclusion range 26d. When the second group lens 25 and the third group lens 2 are closest to each other, the caulking claw 26c is disposed at a position where it does not interfere with the shooting-time contact portion movement range 17c. Arranged in the exclusion range 26d.

  When an impact in the optical axis direction is applied to the image blur correction device, the thrust spring 14 extends, and the third group frame 8 floats as shown in FIG. 23, and the third group lens convex portion 2e becomes the second group lens 25 (see FIG. 23). Approaches (not shown). However, as shown in FIG. 28, since the shooting contact portion 17a has a convex shape that protrudes closer to the subject side than the third group lens convex portion 2e, the shooting contact portion 17a is 2 more than the third group lens convex portion 2e. It contacts the group lens 25 first. Thereby, contact with the 3rd group lens convex part 2e and the 2nd group lens 25 is prevented, and it can prevent that a damage | wound arises or is damaged to each lens.

  Further, when an impact in a direction perpendicular to the optical axis is applied to the image blur correction device, the thrust spring 14 extends, the third group frame 8 moves in the P direction and the Q direction, and when the holder torsion spring 4 extends further, the third group holder. 3 moves in the R direction. At this time, the third group lens convex portion 2e moves within the range of the third group lens convex portion movement range 2f, and the photographing contact portion 17a moves within the photographing contact portion movement range 17c.

  Here, in this embodiment, the caulking claw 26c is disposed in a range that does not overlap with the third group lens convex portion moving range 2f and the photographing contact portion moving range 17c when viewed from the optical axis direction. In other words, the third group lens convex portion moving range 2f and the photographing contact portion moving range 17c are arranged in the caulking nail exclusion range 26d. Therefore, as shown in FIG. 28, the caulking claw 26c, the third lens group convex portion 2e, and the photographing contact portion 17a are orthogonal to the optical axis direction when viewed from the direction orthogonal to the optical axis direction. Even if an impact is applied in the direction, it is possible to prevent the caulking claw 26c from interfering with the third lens group convex portion 2e and the photographing contact portion 17a. In this way, a highly reliable image blur correction device with respect to impact can be realized.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to said embodiment, A material, a shape, a dimension, a form, a number, an arrangement | positioning location, etc. are the range which does not deviate from the summary of this invention. In FIG.

  For example, in the above-described embodiment, the image blur is corrected by moving the third group holder 3 that holds the third group lens 2 in a plane orthogonal to the optical axis. May be rotated in a direction to correct image blur about an axis orthogonal to the optical axis.

  In the above embodiment, the image blur correction apparatus according to the present invention is applied to a digital camera which is an example of an optical apparatus. However, the present invention is not limited to this. That is, the image blur correction device according to the present invention can be applied to various optical devices such as an imaging device such as a digital video camera, an interchangeable lens for a digital single lens reflex camera, a binocular, a telescope, or an observation device such as a field scope. .

2 3rd group lens 3 3rd group holder 3f 3rd group lens convex part movement range 5 Holder shaft 6 3rd group lever 7 3rd group lever shaft 8 3rd group frame 8d Magnet 9 3rd group base plate 9c Coil 17 3rd group mask 17a Contact part at the time of photography 17c Contacting part movement range at the time of photographing 25 2nd lens group 26 2nd lens group holder 26c Caulking claw 26d Caulking claw exclusion range 100 Lens barrel

Claims (5)

A fixing member;
A first optical member for correcting image blur;
A first holding member for holding the first optical member;
The first holding member is rotated in a first direction within a plane perpendicular to the optical axis between a photographing position where the first optical member is positioned on the optical axis and a retracted position where the first optical member is retracted from the optical axis. The image blur of the subject image formed on the image sensor through the imaging optical system including the first optical member that is supported by the movable member and supported by the fixed member and disposed at the imaging position is orthogonal to the optical axis. A frame member to be corrected by moving in the second direction in the plane;
Driving means for driving the frame member together with the first holding member in the second direction;
A biasing member that biases the first holding member toward the photographing position;
A retracting drive member for moving the first holding member to the retracted position against the biasing force of the biasing member;
A second optical member disposed adjacent to the first optical member;
When the first optical member is at the photographing position, the first optical member is disposed on the second optical member side of the first holding member so as to overlap with the second optical member when viewed from the optical axis direction. A photographing contact member that moves integrally with the first optical member in the first direction and the second direction,
The photographing contact member has a photographing contact portion that protrudes closer to the second optical member than the surface of the first optical member on the second optical member side in the optical axis direction. Image blur correction device.   The image blur correction apparatus according to claim 1, wherein at least a part of the shooting contact portion is provided on a movement locus of the first optical member in the second direction. A second holding member for holding the second optical member;
On the side of the second holding member facing the first optical member in the optical axis direction, a fixing means for fixing the second optical member is provided,
The fixing means is a shooting contact portion moving range in which the shooting contact portion moves when the first optical member moves in the first direction and the second direction. The image blur correction device according to claim 1, wherein the image blur correction device is disposed in a range that does not overlap when viewed from the optical axis direction.   When the first optical member and the second optical member are closest to each other, the photographing contact portion and the fixing means overlap when viewed from a direction orthogonal to the optical axis direction. The image blur correction device according to claim 3.   An optical apparatus comprising the image blur correction device according to claim 1.

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