JP2017146444A - Image tremor correction device, and optical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique that can prevent deficiency of an amount of retreat of an optical member for correction of an image tremor and retreating from an optical axis upon collapsing, while achieving downsizing of an optical instrument.SOLUTION: An image tremor correction device comprises: a frame member 8 that moves in a direction orthogonal to an optical axis with respect to a stationary member 9 in a state of supporting a holding member 3 holding an optical member movably along a surface orthogonal to the optical axis between a shooting position located on an optical axis and a retreat position retreating from the optical axis, and thereby corrects an image tremor of a subject image to be image-formed on an image pick-up element through an imaging optical system including the optical member present at the shooting position; and a retreat drive member 6 that is rotatably held in the stationary member 9, and when the stationary member 9 moves in an optical axis direction, abuts on a cylinder member 21 arranged on an outer periphery side of the stationary member 9, and thereby rotatingly actuates to move the holding member 3 against urging force of an urging member 4 from the shooting position to the retreat position. In the stationary member 9, an abutting part 9j, which abuts on the cylinder member 21 when the holding member 3 moves from the shooting position to the retreat position, and regulates deformation of the stationary member 9, is provided protruding in a direction of the shooting position of the holding member 3.SELECTED DRAWING: Figure 13

Description

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

  Many imaging devices such as digital cameras are equipped with an image blur correction device for suppressing image blur at the time of shooting. As such an image blur correction device, a correction lens incorporated in an imaging optical system or a holding member that holds an image sensor is moved in a plane perpendicular to the optical axis, thereby causing image blur caused by camera shake during shooting. Technology to relieve this is known.

  For example, the image blur correction is configured such that the holder member that holds the correction lens and the frame member that rotatably holds the holder member while being supported by the base plate member are movable in a plane perpendicular to the optical axis. An apparatus has been proposed (Patent Document 1). The holder member is switched between the photographing position and the retracted position by a lever member that is rotatably held by the base plate member, and the lever member rotates when the rectilinear cylinder comes into contact therewith.

  When the lens barrel is retracted, the straight cylinder comes into contact with the lever member and the lever member rotates, so that the holder member is retracted from the optical axis, and another lens is placed in the space where the holder member was arranged at the time of photographing. The group is stored. As a result, the size of the imaging device when the lens barrel is in the retracted position is reduced.

Japanese Patent Laying-Open No. 2015-121595

  However, in Patent Document 1, when the straight cylinder comes into contact with the lever member, a pressing force from the straight cylinder acts on the lever member. Since the lever member is held by the base plate member, the same force acts on the base plate member, and the base plate member may be displaced from the normal position due to deformation of the base plate member or a fitting gap between components. . When the base plate member is displaced from the normal position, the retracting amount of the holder member whose position is defined by the base plate member is insufficient at the time of retracting, and interferes with other lens groups retracted at the same height in the optical axis direction. There is a risk that the lens barrel cannot be downsized.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a technique capable of preventing the retraction amount of an optical member for image blur correction that retreats from the optical axis during retraction while reducing the size of the optical device. .

  In order to achieve the above object, an image blur correction device according to the present invention includes a fixing member provided to be movable in the optical axis direction in a state where rotation is restricted, a holding member that holds an optical member, and the fixing member The holding member is movably supported along 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. A frame member that corrects image blur of a subject image formed on an image sensor through a photographing optical system including the optical member at the photographing position by moving in parallel in a plane orthogonal to the optical axis with respect to the fixed member. And an urging member that urges the holding member toward the photographing position, and is rotatably held by the fixing member, and the outer peripheral side of the fixing member when the fixing member moves in the optical axis direction. Abutting on the cylindrical member arranged in A retraction drive member that rotates to move the holding member from the photographing position to the retraction position against the urging force of the urging member, and the holding member is attached to the fixing member. When moving from the photographing position to the retracted position against the urging force of the urging member, the abutting portion that abuts on the cylindrical member and restricts deformation of the fixing member is a direction of the photographing position of the holding member It is characterized by being provided so as to protrude.

  In order to achieve the above object, the optical apparatus of the present invention includes a fixing member that is movable in the optical axis direction in a state where rotation is restricted, a holding member that holds the optical member, and the fixing member The holding member is movably supported along 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. A frame member that corrects image blur of a subject image formed on an image sensor through a photographing optical system including the optical member at the photographing position by moving in parallel in a plane orthogonal to the optical axis with respect to the fixed member. And an urging member that urges the holding member toward the photographing position, and a rotation member that is rotatably held by the fixing member, thereby rotating the holding member against the urging force of the urging member. The retraction position from the shooting position A retraction driving member to be moved, and a cylindrical member that is disposed on the outer peripheral side of the fixing member and rotates the retraction driving member by contacting the retraction driving member when the fixing member moves in the optical axis direction. And a rotating cylinder that is arranged on the outer peripheral side of the cylinder member in a state in which the fixing member is engaged and rotates to move the fixing member in the optical axis direction, and the holding member is in the photographing position When moving from the retracted position to the retracted position, at least one of the cylindrical member and the rotating cylinder is provided with a contact portion that protrudes toward the other, protruding toward the other.

  ADVANTAGE OF THE INVENTION According to this invention, it can prevent that the retraction | saving amount of the optical member for image blur correction retracted | saved from an optical axis at the time of retraction is insufficient, aiming at size reduction of an optical apparatus.

(A) is the perspective view which looked at the digital camera which is an example of embodiment of an optical apparatus provided with the image blurring correction apparatus of this invention from the front side, (b) is the lens mirror mounted in the digital camera shown to (a). It is the perspective view which looked at the pipe | tube from the front side. (A) is sectional drawing in alignment with the optical axis direction in the imaging position of a lens barrel, (b) is sectional drawing in alignment with the optical axis direction in the retracted position of a lens barrel. (A) is the perspective view which looked at the image blur correction apparatus from the front side, (b) is the perspective view which looked at the image blur correction apparatus from the back side. It is a disassembled perspective view of an image blur correction apparatus. (A) is a front view of the image blur correction apparatus when the third group holder is at the photographing position, and (b) is an image blur correction apparatus when the third group holder is in the retracted position retracted in the direction orthogonal to the optical axis. It is a front view. (A) is a perspective view of the relationship between the third group holder, the third group frame, and the third group lever when viewed from the rear side when the third group holder is in the shooting position, and (b) is when the third group holder is in the retracted position. It is the perspective view which looked at the relationship between this 3 group holder, 3 group frame, and 3 group lever from the back side. FIG. 3 is a right side view of the image blur correction device as viewed from the subject side in the optical axis direction. (A) is the sectional view on the AA line of FIG. 7 when the third group holder is at the photographing position, and (b) is the sectional view along the AA line of FIG. 7 when the third group holder is at the retracted position. FIG. 8A is a cross-sectional view taken along line B-B in FIG. 7 when the third group holder is in the photographing position, and FIG. 7B is a cross-sectional view taken along line B-B in FIG. 7 when the third group holder is in the retracted position. (A) is a front view including a holder shaft and a lever shaft when the third group holder is at the photographing position, and (b) is a sectional view taken along the line CC of (a). (A) is a front view including an image blur correction device and a rectilinear cylinder, and (b) is a cross-sectional view taken along the line DD of (a) when the lens barrel is at the photographing position. FIG. 11A is a sectional view taken along the line DD in FIG. 11A when the lens barrel is at an intermediate position between the photographing position and the retracted position, and FIG. 11B is a diagram when FIG. It is the DD sectional view taken on the line of (a). 11A is a cross-sectional view taken along line EE in FIG. 11A when the lens barrel is at an intermediate position between the photographing position and the retracted position, and FIG. 11B is a view when FIG. 11 is when the lens barrel is in the retracted position. It is the EE sectional view taken on the line of (a). (A) is a sectional view along a direction orthogonal to the optical axis when the lens barrel is at an intermediate position between the photographing position and the retracted position, and (b) is orthogonal to the optical axis when the lens barrel is in the retracted position. It is sectional drawing which follows the direction to do. (A) is a perspective view of the relationship between the third group base plate and the rectilinear cylinder when the lens barrel is at an intermediate position between the photographing position and the retracted position, and (b) is a perspective view of the rectilinear cylinder from the front side. FIG.

  Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1A is a perspective view of a digital camera as an example of an embodiment of an optical apparatus provided with the image blur correction device of the present invention as viewed from the front side (subject side), and FIG. It is the perspective view which looked at the lens barrel mounted in the digital camera shown to from the front side. In the present embodiment, a compact digital camera is illustrated as an example of an optical apparatus including an image blur correction device, but the present invention is not limited to this.

  As shown in FIG. 1, the digital camera of this embodiment is provided with a retractable zoom lens barrel 100 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 in the optical axis direction from the photographing position to the retracted position.

  2A is a cross-sectional view taken along the optical axis direction at the photographing position of the lens barrel 100, and FIG. 2B is a cross-sectional view taken along the optical axis direction at the retracted position of the lens barrel 100.

  As shown in FIG. 2, the lens barrel 100 includes a first group holder 24 a that holds the first group lens 23, a first group barrel 24 b that holds the first group holder 24 a, and a second group holder 26 that holds the second group lens 25. Is provided. The lens barrel 100 includes a third group holder 3 that holds the third group lenses 2 a and 2 b, a fourth group holder 28 that holds the fourth group lens 27, and a sensor holder 30 that holds the fifth group lens 29.

  The first group lens 23, the first group holder 24a and the first group barrel 24b constitute a first group unit, and the second group lens 25 and the second group holder 26 constitute a second group unit, and the third group lenses 2a, 2b and 3 The group holder 3 constitutes a third group unit. The fourth group lens 27 and the fourth group holder 28 constitute a fourth group unit, and the fifth group lens 29 and the sensor holder 30 constitute a fifth group unit. The first group lens 23, the second group lens 25, the third group lenses 2a and 2b, the fourth group lens 27, and the fifth group lens 29 constitute a photographing optical system of the lens barrel 100.

  A shutter unit 32 is disposed between the second group unit and the third group unit. The shutter unit 32 moves a subject between a pair of shutter blades (not shown) between a position where the light path is shielded and a position where the light path is retracted within a plane orthogonal to the optical axis, thereby forming an image on the image sensor 36. Adjust the amount of luminous flux.

  The sensor holder 30 supports a focus drive unit (not shown) and a zoom drive unit 31. A focus driving operation is performed by moving the fourth group holder 28 holding the fourth group lens 27 in the optical axis direction by the focus driving unit, and the zoom driving unit 31 moves the third group unit from the first group unit in the optical axis direction. The zoom operation is performed.

  Next, the zoom mechanism will be described. The fixed barrel 22 is disposed on the outermost peripheral side of the lens barrel 100. On the inner peripheral portion of the fixed barrel 22, three cam grooves 22a and straight key grooves 22b are formed at substantially equal intervals in the circumferential direction. ing. An outer cam cylinder 34 is disposed on the inner peripheral side of the fixed cylinder 22. Three followers (not shown) that engage with the three cam grooves 22a of the fixed cylinder 22 are provided at substantially equal intervals in the circumferential direction on the outer peripheral portion of the outer cam cylinder 34, respectively. A plurality of bayonet claws (not shown) are formed in the inner circumferential portion of the outer cam cylinder 34 in the circumferential direction and the optical axis direction.

  The zoom drive unit 31 rotationally drives the outer cam cylinder 34. 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 22 a while rotating with respect to the fixed cylinder 22.

  An outer rectilinear cylinder 35 is disposed on the inner peripheral side of the outer cam cylinder 34. A rectilinear key groove 35 a is formed in the inner peripheral portion of the outer rectilinear cylinder 35, and a circumferential groove 35 b in which a bayonet claw (not shown) of the outer cam cylinder 34 engages is formed in the outer peripheral portion of the outer rectilinear cylinder 35. Has been. Further, a rectilinear key (not shown) that engages with the rectilinear key groove 22 b of the fixed cylinder 22 is formed on the outer peripheral portion of the outer rectilinear cylinder 35. The outer rectilinear cylinder 35 moves linearly in the optical axis direction along the rectilinear key groove 22b of the fixed cylinder 22 as the outer cam cylinder 34 rotates.

  An inner cam cover 33 is disposed on the inner peripheral side of the outer rectilinear cylinder 35, and an inner cam cylinder 20 is disposed on the inner peripheral side of the inner cam cover 33. Three cam grooves 20a, shutter cam grooves 20b, and second group cam grooves 20c are formed in the inner circumferential portion of the inner cam cylinder 20 at substantially equal intervals in the circumferential direction. On the outer peripheral portion of the inner cam cylinder 20, three first-group cam grooves 20d are provided at substantially equal intervals in the circumferential direction.

  Further, the follower 20f, the engaging portion 20g of the inner cam cover 33, and the drive key 20h are formed on the outer peripheral portion of the inner cam cylinder 20 at substantially equal intervals in the circumferential direction (see FIG. 12A). . The inner cam cover 33 has three engaging claws (not shown) that engage with the engaging portion 20g of the inner cam cylinder 20 and three rotation stoppers (fitting with the drive key 20h of the inner cam cylinder 20). (Not shown) is formed.

  Further, the drive key 20 h of 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 integrally with the inner cam cylinder 20 as the inner cam cylinder 20 rotates. Move in the axial direction.

  The inner cam cylinder 20 holds the rectilinear cylinder 21 on its inner periphery so as to be relatively rotatable. A rectilinear plate 19 is integrally attached to the rectilinear cylinder 21. The rectilinear plate 19 is formed with a rectilinear key 19a (see FIG. 12) that engages with a rectilinear key groove 35a provided on the inner peripheral portion of the outer rectilinear cylinder 35. The straight cylinder 21 is formed 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 is formed with a retracting introduction surface 21e that comes into contact with the third group lever 6 (see FIGS. 3 and 4) and a retreat completion surface 21f that comes into contact with the third group lever 6 and a flange 21g (FIG. 12). reference). Further, the straight cylinder 21 is formed with a third group contact portion 21h and a contact portion 21i (see FIG. 15B). The operation of the third group contact portion 21h and the contact portion 21i will be described later. The rectilinear cylinder 21 is rotatably held with respect to the inner cam cylinder 20 by the flange 21g and the rectilinear plate 19, and moves integrally with the inner cam cylinder 20 in the optical axis direction.

  Six first group followers (not shown) are provided 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 guided by the first-group guide key 21b of the rectilinear cylinder 21. The first group holder 24a and the first group barrel 24b move integrally in the optical axis direction.

  On the outer periphery of the second group holder 26, three second group followers (not shown) are provided at substantially equal intervals in the circumferential direction. These three second group followers respectively engage with the three second group cam grooves 20c provided on the inner peripheral portion of the inner cam cylinder 20, and are guided by the second group guide grooves (not shown) of the rectilinear cylinder 21. Thus, the second group holder 26 is supported so as to be movable in the optical axis direction.

  Three shutter followers 32a are provided on the outer periphery of the shutter unit 32 at substantially equal intervals in the circumferential direction. Each of these three shutter followers 32a engages with three shutter cam grooves 20b provided on the inner peripheral portion of the inner cam cylinder 20, and is guided by the third group guide groove 21d of the rectilinear cylinder 21, thereby releasing the shutter. The unit 32 is supported so as to be able to advance and retract in the optical axis direction.

  Next, an image blur correction device incorporated in the lens barrel 100 will be described with reference to FIGS. FIG. 3A is a perspective view of the image blur correction device viewed from the front side, and FIG. 3B is a perspective view of the image blur correction device viewed from the back side (image plane side). FIG. 4 is an exploded perspective view of the image blur correction apparatus.

  As shown in FIGS. 3 and 4, the image blur correction device includes a third group holder 3, a holder torsion spring 4, a holder shaft 5, a third group lever 6, a third group frame 8, and the third group lenses 2a and 2b. 3 group ground plane 9 etc. are provided.

  Here, the third group lenses 2a and 2b correspond to an example of an optical member for image blur correction of the present invention, the third group holder 3 corresponds to an example of a holding member of the present invention, and the holder torsion spring 4 It corresponds to an example of the urging member of the present invention, and the rectilinear cylinder 21 corresponds to an example of the cylinder member of the present invention. The third group lever 6 corresponds to an example of the retracting drive member of the present invention, the third group frame 8 corresponds to an example of the frame member of the present invention, and the third group base plate 9 is an example of the fixing member of the present invention. The inner cam cylinder 20 corresponds to an example of the rotary cylinder of the present invention.

  FIG. 5A is a front view of the image blur correction apparatus when the third group holder 3 is at the photographing position, and FIG. 5B is a state when the third group holder 3 is in the retracted position retracted in the direction orthogonal to the optical axis. It is a front view of the image blur correction apparatus. In FIG. 5, illustration of the third group flexible substrate 11 and the hall sensor holder 12 is omitted.

  FIG. 6A is a perspective view of the relationship between the third group holder 3, the third group frame 8, and the third group lever 6 when the third group holder 3 is at the photographing position, as viewed from the back side. FIG. 6B is a perspective view of the relationship between the third group holder 3, the third group frame 8, and the third group lever 6 when the third group holder 3 is in the retracted position, as viewed from the back side.

  FIG. 7 is a right side view of the image blur correction apparatus as viewed from the subject side in the optical axis direction. 8A is a cross-sectional view taken along line AA in FIG. 7 when the third group holder 3 is in the photographing position, and FIG. 8B is a cross section taken along AA in FIG. 7 when the third group holder 3 is in the retracted position. It is line sectional drawing.

  9A is a cross-sectional view taken along line BB in FIG. 7 when the third group holder 3 is in the photographing position, and FIG. 9B is a cross section taken along line BB in FIG. 7 when the third group holder 3 is in the retracted position. It is line sectional drawing. FIG. 10A is a front view including the holder shaft 5 and the lever shaft 7 when the third group holder 3 is at the photographing position, and FIG. 10B is a cross-sectional view taken along the line CC in FIG. .

  The third group holder 3 that holds the third group lenses 2a and 2b includes a stopper 3a (see FIG. 9), a sleeve 3b (see FIG. 10B) parallel to the optical axis, and a retracting contact surface 3c (see FIG. 7). a) and an interference avoidance space 3d (see FIG. 9A) are provided. A third group mask 17a (see FIG. 5) is integrally attached to the subject side of the third group holder 3, and a third group mask 17b (see FIG. 6) is integrally attached to the imaging surface side of the third group holder 3. It has been.

  A bearing 8a (see FIG. 10) that supports the holder shaft 5, a ball receiving surface 8b (see FIG. 6) that contacts the ball 13 (see FIG. 9), and one end of a thrust spring 14 are hooked on the third group frame 8. A spring hook 8c is provided. Three balls 13 and three thrust springs 14 are provided, and three ball receiving surfaces 8b and three spring hooks 8c are respectively arranged correspondingly.

  As shown in FIG. 8, the third group frame 8 receives a pair of magnets 8 d that are spaced apart from each other by 90 ° in the circumferential direction within a plane orthogonal to the optical axis, and a stopper portion 3 a of the third group holder 3. The contact surface 8e (refer FIG.6 (b)) which contact | connects is provided. Furthermore, the third group frame 8 is provided with mechanical end regulating portions 8g and 8h for regulating the movement range of the third group frame 8.

  The holder shaft 5 is pressed into the sleeve 3b of the third group holder 3 in parallel with the optical axis. The third group holder 3 is supported by a bearing portion 8a of the third group frame 8 so as to be rotatable between a photographing position and a retracted position via a holder shaft 5, and an optical axis integrally with the third group frame 8 at the time of image blur correction. Move in a plane perpendicular to

  The holder torsion spring 4 (see FIGS. 4 and 8) has a torsion spring portion and a compression spring portion, and is externally inserted into the sleeve 3 b of the third group holder 3. The torsion spring portion of the holder torsion spring 4 urges the third group holder 3 against the third group frame 8 so that the stopper portion 3a of the third group holder 3 contacts the contact surface 8e of the third group frame 8. That is, the third group holder 3 holding the third group lenses 2a and 2b is urged from the retracted position toward the photographing position. The compression spring portion of the holder torsion spring 4 urges the third group holder 3 toward the subject side in the optical axis direction, and the tip of the subject side of the sleeve 3b of the third group holder 3 on the subject side of the third group frame 8. It abuts on the bearing portion 8a.

  The third group base plate 9 is provided on the inner peripheral side of the rectilinear cylinder 21, and as shown in FIG. 9, a spring hook 9b on which the other end of the ball groove 9 and the thrust spring 14 is hooked is provided. Due to the urging force of the thrust spring 14, the three balls 13 roll in a plane perpendicular to the optical axis while being sandwiched between the ball receiving surface portion 8 b of the third group frame 8 and the ball groove 9 a of the third group base plate 9. It is stored movably.

  Further, the third group base plate 9 includes a bearing portion 9d (see FIG. 10B) that supports the lever shaft 7 in parallel with the optical axis, and a follower 9e that engages with the cam groove 20a of the inner cam cylinder 20 (FIG. 2). 9) (refer to FIG. 9). Further, the third group base plate 9 is provided with mechanical end regulating portions 9g and 9h (see FIG. 8) for regulating the movement range of the third group frame 8, and a contact portion 9j (see FIG. 7 and FIG. 15 (a)). It has been. The details of the contact portion 9j will be described later.

  The third group base plate 9 is provided with a pair of coils 9c (see FIGS. 4 and 9) arranged in the same phase as the pair of magnets 8d. When the pair of coils 9c are energized, Lorentz force is generated between the pair of magnets 8d. Range in which the mechanical end restricting portions 8g and 8h (see FIGS. 6 and 8) of the third group frame 8 abut on the mechanical end restricting portions 9g and 9h of the third group base plate 9 in the plane perpendicular to the optical axis by the Lorentz force. Thus, the third group frame 8 is supported to be movable relative to the third group base plate 9.

  A pair of Hall elements 10 (see FIG. 4) 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 a hall sensor holder 12 (see FIGS. 3 and 4) fixed to the third group base plate 9.

  The Hall element 10 detects a change in the direction and magnitude of the magnetic force of the pair of magnets 8d, and a control unit (not shown) of the camera body 101 detects the position of the third group frame 8 relative to the Hall sensor holder 12 based on the detection result. Ask for. 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 By moving the third group holder 3 together with the third group frame 8 in the direction of correcting image blur in this way, image blur due to vibration such as camera shake of the subject image formed on the image sensor 36 through the photographing optical system is corrected. Thus, images and videos without image blur can be obtained.

  The third group lever 6 has a fitting hole 6a (see FIGS. 6 and 10B) into which the lever shaft 7 is fitted, and a retracting contact portion 6b that contacts the retracting contact surface 3c of the third group holder 3. (See FIG. 6A). Further, as shown in FIG. 12, the third group lever 6 is provided with a retreat slope portion 6c that contacts the retraction introduction surface 21e of the rectilinear cylinder 21, and a retreat completion portion 6d that abuts the retraction completion surface 21f of the rectilinear cylinder 21. It has been.

  The third group lever 6 is supported by the bearing portion 9d of the third group base plate 9 so as to be rotatable about the lever shaft 7. The third group lever 6 is attached to the photographing position contact surface 9f (see FIG. 9) of the third group base plate 9 by a lever torsion spring 18 (see FIGS. 4 and 10B) attached around the lever shaft 7. It is urged toward the photographing position so as to abut.

  Next, the arrangement of the image blur correction device inside the lens barrel 100 will be described. As shown in FIGS. 2 and 3, three followers 9 e are provided on the outer peripheral portion of the third group base plate 9 at substantially equal intervals in the circumferential direction. These three followers 9e are respectively engaged with three cam grooves 20a (see FIG. 3) formed in the inner peripheral portion of the inner cam cylinder 20, and are guided by the third group guide groove 21d of the rectilinear cylinder 21. The As a result, the third group base plate 9 is supported so as to be movable 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 movable in the optical axis direction.

  Next, 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 with reference to FIGS. FIG. 11A is a front view including the image blur correction device and the rectilinear barrel 21, and FIG. 11B is a cross-sectional view taken along the line DD in FIG. 11A when the lens barrel 100 is in the photographing position. . 12A is a cross-sectional view taken along the line DD of FIG. 11A when the lens barrel 100 is at an intermediate position between the photographing position and the retracted position, and FIG. 12B is a retracted position of the lens barrel 100. It is the DD sectional view taken on the line of Fig.11 (a) when it exists in.

  When the lens barrel 100 is at the photographing position shown in FIG. 11B, the third group holder 3 that holds the third group lenses 2a and 2b is disposed at the photographing position on the optical axis of the lens barrel 100 (see FIG. 11). 6 (a) and FIG. 8 (a)). At this time, as shown in FIG. 9A, the third group lever 6 is held in the interference avoidance space 3 d where the retreat contact portion 6 b does not contact the retreat contact surface 3 c of the third group holder 3. Thereby, at the time of image blur correction operation, the third group holder 3 can translate in a plane perpendicular to the optical axis integrally with the third group frame 8.

  As shown in FIG. 12A, when the lens barrel 100 starts to be retracted from the photographing position to the retracted position, the inner cam cylinder 20 rotates and the three followers 9 e on the outer peripheral portion of the third group base plate 9 are rotated. Moves along the cam groove 20a in a direction approaching the rectilinear cylinder 21. By 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 rotates around the lever shaft 7 against the urging force of the lever torsion spring 18. The retraction contact portion 6 b contacts the retraction contact surface 3 c of the third group holder 3. Further, by the rotation of the third group lever 6, the third group holder 3 moves out of 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. 12B, the third group base plate 9 follows the optical axis until the retreat completion portion 6d of the third group lever 6 contacts the retreat completion surface 21f of the rectilinear cylinder 21. As a result, the third group holder 3 moves to the retracted position. The operation of the image blur correction apparatus when the lens barrel 100 is extended from the retracted position to the photographing position changes from the state of FIG. 12B to the state of FIG. 11B through the state of FIG. .

  In the lens barrel 100, when the third group holder 3 is moved to the retracted position outside the optical axis when retracted, the fourth group lens 27 and the third group holder 27 in the space where the third group holder 3 in the third group frame 8 is disposed at the photographing position. The fifth group lens 29 is housed (see FIG. 2B). As a result, the thickness of the lens barrel 100 in the optical axis direction when retracted can be reduced.

  Next, the relationship among the third group base plate 9, the third group lever 6, the inner cam cylinder 20, and the rectilinear cylinder 21 when the third group holder 3 is retracted will be described with reference to FIGS.

  13A is a cross-sectional view taken along line EE in FIG. 11A when the lens barrel 100 is at an intermediate position between the photographing position and the retracted position, and FIG. 13B is a retracted position of the lens barrel 100. It is the EE sectional view taken on the line of Fig.11 (a) when it exists in. In FIG. 13, the relationship between the third group base plate 9, the third group lever 6 and the rectilinear cylinder 21 will be described.

  FIG. 14A is a cross-sectional view taken along the direction orthogonal to the optical axis when the lens barrel 100 is at an intermediate position between the photographing position and the retracted position, and FIG. 14B is the lens barrel 100 in the retracted position. It is sectional drawing in alignment with the direction orthogonal to the optical axis at the time. In FIG. 14, the relationship among the third group base plate 9, the rectilinear cylinder 21, and the inner cam cylinder 20 will be described.

  FIG. 15A is a perspective view of the relationship between the third group base plate 9 and the rectilinear cylinder 21 when the lens barrel 100 is at an intermediate position between the photographing position and the retracted position, and FIG. It is the perspective view which looked at the straight advance cylinder 21 from the front side.

  As described above, when the lens barrel 100 is retracted, the third group lever 6 rotates around the lever shaft 7 by contacting the rectilinear cylinder 21, and the retracting contact portion 6 b of the third group lever 6. Comes into contact with the retracting contact surface 3 c of the third group holder 3. Thereby, the third group holder 3 is rotated to the retracted position in the direction orthogonal to the optical axis.

  The third group lever 6 is rotated toward the retracted position against the urging force of the lever torsion spring 18 by the retract introduction surface 21e and the retract completion surface 21f of the rectilinear cylinder 21. A force in the A direction (direction of the photographing position) shown in FIGS. 13 and 14 is applied. Further, since the third group lever 6 is held by the third group base plate 9, a force in the A direction is similarly applied to the third group base plate 9.

  In the third group base plate 9, three followers 9 e provided at substantially equal intervals in the circumferential direction are engaged with the inner cam cylinder 20. As shown in FIG. 13, when the position of the follower 9 e of the third group base plate 9 and the position of the third group lever 6 in the optical axis direction are different, the force of the A direction causes B to start from the third group follower 9 e with respect to the third group base plate 9. Directional rotational force (moment force) is applied. In this case, when the third group base plate 9 is displaced from the normal position due to deformation of the third group base plate 9 in the B direction or a fitting gap between components, etc., the third group holder whose position is defined by the third group base plate 9 3 may be insufficient.

  Therefore, in the present embodiment, as shown in FIG. 7 and FIG. 15A and the like, a contact portion 9j protruding radially outward is provided on the outer peripheral portion of the third group base plate 9, so that the third group base plate 9 abuts. The portion 9j is configured to abut against the third group abutting portion 21h of the rectilinear cylinder 21 to restrict deformation of the third group base plate 9. With reference to FIG. 13, the relationship between the contact portion 9j of the third group base plate 9, the third group follower 9e, and the third group lever 6 will be described.

  Further, between the third group follower 9e of the third group base plate 9 and the contact portion 9j, a retreat slope portion 6c and a retreat completion portion 6d of the third group lever 6 are disposed. With such an arrangement relationship, even when a force is applied in the direction in which the third group base plate 9 tilts in the B direction starting from the third group follower 9e, the contact portion 9j of the third group base plate 9 and the straight cylinder 21 The 3rd group contact part 21h can contact | abut, and the inclination of the B direction of the 3rd group base plate 9 can be prevented. As a result, a shortage of the retracted amount of the third group holder 3 can be avoided.

  Next, with reference to FIGS. 14 and 15, the relationship among the third group lever 6, the rectilinear cylinder 21, and the inner cam cylinder 20 when the third group holder 3 is retracted will be described.

  As described above, when the lens barrel 100 is retracted, a force in the A direction is applied to the third group lever 6 from the rectilinear barrel 21. On the other hand, a force in the C direction is applied to the rectilinear cylinder 21 from the third group lever 6. Since the rectilinear cylinder 21 is held on the inner peripheral part of the inner cam cylinder 20 so as to be relatively rotatable, a minute gap is formed between the outer peripheral part of the rectilinear cylinder 21 and the inner peripheral part of the inner cam cylinder 20. The

  Therefore, when a force in the C direction is applied to the rectilinear cylinder 21, the rectilinear cylinder 21 moves by a gap in the C direction, the rectilinear cylinder 21 is eccentric with respect to the optical axis, and the retracting introduction surface 21e of the rectilinear cylinder 21 and the retracting completion are performed. There is a possibility that the surface 21 f is separated from the third group lever 6. In this case, the rotation amount of the third group lever 6 during the retraction operation is reduced, and the retraction amount of the third group holder 3 may be insufficient.

  Therefore, in the present embodiment, a contact portion 21i that contacts the inner peripheral portion of the inner cam tube 20 is formed on the outer peripheral portion of the rectilinear tube 21 so as to protrude radially outward, so that the contact portion 21i and the inner cam tube 20 There are no gaps between them. Accordingly, when a force in the C direction is applied to the rectilinear barrel 21 when the lens barrel 100 is retracted, the rectilinear barrel 21 can be prevented from moving in the C direction, and the retracted amount of the third group holder 3 Can be avoided. Note that the abutting portion may be provided not on the rectilinear cylinder 21 but on the inner cam cylinder 20, or on both the rectilinear cylinder 21 and the inner cam cylinder 20. That is, a contact portion that contacts the other peripheral surface may be provided on at least one peripheral surface of the rectilinear tube 21 and the cam tube 20.

  As described above, in the present embodiment, the lens barrel 100 is reduced in size, but the retracting amount of the third group lenses 2a and 2b constituting the optical member for image blur correction that retracts from the optical axis when retracted is insufficient. Can be prevented. Therefore, it is possible to realize a highly reliable lens retracting mechanism in which the third group holder 3 does not interfere with other lens groups.

  The configuration of the present invention is not limited to that exemplified in the above embodiment, and the material, shape, dimensions, form, number, arrangement location, and the like can be changed as appropriate without departing from the scope of the present invention. It is.

  For example, in the above-described embodiment, a digital camera is illustrated as an optical apparatus including the image blur correction device, but 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, an observation device such as a binocular, a telescope, or a field scope. It is.

2a, 2b 3rd group lens 3 3rd group holder 4 Holder torsion spring 5 Holder shaft 6 3rd group lever 6c Retreat slope part 6d Retreat complete part 8 3rd group frame 9 3rd group base plate 9e Follower 9j Contact part 20 Inner cam cylinder 21 Straight advance cylinder 21i Contact part 100 Lens barrel 101 Camera body

Claims (4)

A fixing member provided so as to be movable in the optical axis direction in a state where rotation is restricted;
A holding member for holding the optical member;
The holding member is supported on the inner peripheral side of the fixing member, and the holding member is supported so as to be movable along 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. In this state, the image blur of the subject image formed on the image sensor is corrected through the photographing optical system including the optical member at the photographing position by moving in parallel in a plane perpendicular to the optical axis with respect to the fixed member. A frame member to be
A biasing member that biases the holding member toward the photographing position;
The holding member is rotatably held by the fixing member, and when the fixing member moves in the optical axis direction, the holding member is rotated by abutting against a cylindrical member arranged on the outer peripheral side of the fixing member. A retracting drive member that moves from the photographing position to the retracted position against the biasing force of the biasing member,
When the holding member moves from the photographing position to the retracted position against the urging force of the urging member, the fixing member abuts against the cylindrical member and restricts deformation of the fixing member. An image blur correction apparatus, wherein a contact portion is provided so as to protrude in the direction of the photographing position of the holding member. An optical apparatus comprising the image blur correction device according to claim 1,
An optical apparatus comprising the cylindrical member disposed on an outer peripheral side of the fixing member. A follower provided on the fixing member is engaged and rotated to provide a rotating cylinder that moves the fixing member in the optical axis direction.
3. The optical device according to claim 2, wherein a contact portion of the retracting drive member with respect to the cylindrical member in the optical axis direction is disposed between the contact portion of the fixing member and the follower. machine. A fixing member provided so as to be movable in the optical axis direction in a state where rotation is restricted;
A holding member for holding the optical member;
The holding member is supported on the inner peripheral side of the fixing member, and the holding member is supported so as to be movable along 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. In this state, the image blur of the subject image formed on the image sensor is corrected through the photographing optical system including the optical member at the photographing position by moving in parallel in a plane perpendicular to the optical axis with respect to the fixed member. A frame member to be
A biasing member that biases the holding member toward the photographing position;
A retraction driving member that is rotatably held by the fixing member and moves the holding member from the photographing position to the retraction position against the urging force of the urging member by rotating;
A cylindrical member that is disposed on the outer peripheral side of the fixing member and rotates the retracting drive member by contacting the retracting drive member when the fixing member moves in the optical axis direction;
A rotating cylinder that is arranged on the outer peripheral side of the cylindrical member in a state where the fixing member is engaged and rotates to move the fixing member in the optical axis direction;
When the holding member moves from the photographing position to the retracted position, at least one of the cylindrical member and the rotating cylinder is provided with an abutting portion that abuts against the other projecting toward the other. Optical equipment characterized by.