JP2016151647A - Lens barrel, and shake correction lens retreating method of lens barrel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lens barrel that is simply configured to cause a shake correction lens to be smoothly retreated in a direction orthogonal to an optical axis, and to provide a shake correction lens retreating method of the lens barrel.SOLUTION: Turning off of a main switch causes a slider holding member movement mechanism to move a slider holding member from a first position where a shooting state is ready in an optical axis direction to a second position where an accommodation state is ready. In a state where the slider holding member moves to the second position, a VCM is made operative to cause an engagement of a movement regulation hole with a movement regulation pin to move a slider to a movement limit. An engagement part of a shake correction lens holding member can be abutted on a fixed position of a retreat operation member, and the shake correction lens holding member can be smoothly moved from an optical axis entering position to a retreat position.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a lens barrel and a blur correction lens retracting method for the lens barrel.

  Zoom lenses are frequently used in optical devices such as digital cameras and binoculars. In particular, there is a zoom lens in which the tube length is changed between a housed state in which the lens barrel is housed in a body such as a camera body and a photographing state protruding from the body due to a demand for compactness. .

  Among such zoom lenses, the image stabilization lens of the imaging lens is retracted from the optical axis during the movement in the optical axis direction from the shooting state to the retracted state, and is moved into the retracted space. There are some which store other lenses for the imaging lens (for example, see Patent Documents 1 and 2). As a result, the lens barrel in the housed state can be thinned in the optical axis direction, and portability is improved.

JP 2011-170262 A JP 2014-174491 A

  For example, in the lens barrel described in Patent Document 1 using a slider composed of a first slider and a second slider having a guide bar, a blur correction lens is used in a plane orthogonal to the optical axis using guide bars arranged in the horizontal and vertical directions. Is moving. Since it has a pair of guide rods and a holding portion guided by the guide rods, the configuration is complicated accordingly. Further, since the guide rod is slid, the resistance when the blur correction lens is moved increases, and the voice coil motor becomes larger by that amount, so that the compactness cannot be achieved.

  On the other hand, in the vibration proofing mechanism of the optical device described in Patent Document 2, the vibration proof moving member is orthogonal to the optical axis of the photographing optical system with respect to the base member via a spherical rolling element composed of a plurality of guide balls. It is supported so as to be movable along the surface. Since the vibration-proof moving member is guided to move with respect to the base member by the guide ball, it is not necessary to use a guide bar as described in Patent Document 1, and the configuration can be simplified correspondingly.

  However, in Patent Document 2, although a guide ball is used and the configuration is simple, the third lens group (blur correction lens), which is an anti-vibration optical element, enters the optical axis, In order to displace between the retracted position retracted from the shaft, two swinging members of an insertion / removal frame and a separation drive lever are used. For this reason, the two rocking members are held in a rockable manner and engaged with each other, which is an obstacle to downsizing.

  Therefore, when trying to simplify the configuration by using the guide ball as in the known document 2 with respect to the slider by the guide shaft of the known document 1, the movement of the slider by the guide ball moves in the horizontal direction and the vertical direction. In addition, rotation is also possible, and the slider rotates relative to the slider holding member. For this reason, the engagement position between the engagement portion of the shake correction lens holding frame provided on the slider and the retracting member provided on the base is largely shifted by the amount of rotational displacement. Due to the displacement of the engaging portion, the retraction operation of the blur correction lens holding frame is not smoothly performed. In addition, if the engaging surface of the retracting member is increased in size with an increase in the amount of displacement so that the engaging portion of the blur correction lens holding frame does not come off from the retracting member, there is a new problem that the compactness cannot be achieved. Occur.

  It is an object of the present invention to provide a lens barrel and a blur correction lens retracting mechanism for a lens barrel that can smoothly retract the blur correction lens from the optical axis entry position with a simple and compact configuration.

  In order to achieve the above object, a lens barrel according to the present invention includes a shake correction lens that corrects blur of a subject image, a shake correction lens holding member, a slider, a slider holding member, a voice coil motor, and a slider holding. A member moving mechanism, a retracting member, and a slider initial position moving mechanism are provided. The shake correction lens holding member holds the shake correction lens. The slider is displaced between an advance position where the shake correction lens holding member is swingably held and the shake correction lens is advanced to the optical axis and a retract position where the shake correction lens is retracted from the optical axis, and is urged toward the advanced position. Then, the blur correction lens is positioned at the advanced position. The slider holding member holds the slider movably within a plane orthogonal to the optical axis. The voice coil motor moves the slider in a first direction and a second direction orthogonal to the first direction within a plane orthogonal to the optical axis. The slider holding member moving mechanism moves the slider holding member to the first position and the second position in the optical axis direction. When the slider holding member moves from the first position to the second position in the optical axis direction, the retracting member is brought into contact with the engaging portion of the blur correction lens holding member, and the blur correction lens is moved from the advanced position to the retracted position. Displace. The slider initial position moving mechanism moves the slider to the limit of movement with respect to the slider holding member by the voice coil motor, and moves the slider holding member from the first position to the second position. Is brought into contact with a certain position of the retracting member.

  Note that at least three rollable guide balls that are provided on the opposing surfaces of the slider and the slider holding member and are spaced apart from each other, and a slider that presses the slider against the slider holding member via the guide balls. It is preferable to have a biasing member. The retracting action member may have a retracting action surface formed in a spiral shape around the mounting shaft of the shake correction lens holding member, and a storage position holding surface formed continuously on the retracting action surface in the optical axis direction. preferable. Further, the slider holding member is moved from the first position to the second position by the slider holding member moving mechanism, the tube length is shortened, and the lens different from the blur correction lens in the space where the blur correction lens holding member is retracted from the optical axis. Is preferably stored.

  The retracting member is formed on the fixed base so as to protrude in the optical axis direction. The fixed base has a guide bar that is arranged apart from the retracting member and protrudes in the optical axis direction. The slider is a guide bar. It is preferable to have a guide hole that is inserted and guides the slider so as to be movable in the optical axis direction. Further, it is preferable that a tapered guide surface is formed at the tip of the guide bar and the edge of the guide hole into which the tip is inserted.

  The blur correction lens retracting method for a lens barrel according to the present invention is a blur correction lens that is slidably attached to a slider by moving the slider holding member from the first position to the second position in the optical axis direction by the slider holding member moving mechanism. With the holding member engaged with the retracting member, the blur correction lens is displaced from the optical axis advance position to the retracted position, and the slider is moved by the voice coil motor while the slider holding member moves from the first position to the second position. The movement limit is moved to the slider holding member, and the engagement start position of the shake correction lens holding member and the retracting action member is set to a fixed position.

  According to the present invention, the engagement between the engaging portion of the shake correction lens holding frame attached to the slider and the retracting member is started in a state where the slider is always held at a fixed position with respect to the slider holding member. The two can always be engaged at a fixed engagement position, and a stable retraction operation of the blur correction lens holding frame can be obtained. In addition, the configuration can be simplified and made compact by using a combination of a lever and a guide ball called a shake correction lens holding frame.

It is a longitudinal cross-sectional view of the direction in alignment with the optical axis which shows the digital camera using the lens barrel of this invention. It is the perspective view seen from the to-be-photographed object side which shows disassembled and shows the blurring correction lens evacuation device of a lens barrel. It is the perspective view seen from the image formation side which decomposes | disassembles and shows the blur correction lens retractor of a lens barrel. It is a perspective view which shows a slider and a guide ball. It is the perspective view which looked at the blurring correction lens evacuation device of the lens barrel in the photographing state from the subject side. It is the perspective view which looked at the blurring correction lens evacuation device of the lens barrel in the housed state from the subject side. It is the perspective view which looked at the blur correction lens retracting device of the lens barrel in the housed state from a subject side at an angle different from FIG. It is a front view which shows an example of the relationship between the slider and the movement control pin in the state where the slider was shifted to the slider holding member. It is a flowchart which shows the blurring correction lens retracting method of a lens barrel. It is a side view which shows the blurring correction lens evacuation device of the lens barrel which shows a state immediately before the guide rod is fitted into the guide tube. It is a side view showing a shake correction lens retracting device of a lens barrel in a photographing state. It is a front view which shows the other example of the relationship between the slider and the movement control pin in the state where the slider was shifted to the slider holding member.

  As shown in FIG. 1, a digital camera 10 that is an embodiment of the lens barrel of the present invention has a lens barrel 12 on the front surface of a camera body 11. The lens barrel 12 is switched between a shooting state in which the lens is extended and a storage state when the lens is not used. In the following description, the optical axis direction of the lens barrel 12 is the Z axis, the horizontal direction orthogonal to the optical axis direction is the X axis, and the vertical direction orthogonal to the optical axis direction is the Y axis.

  The lens barrel 12 includes, for example, a fixed cylinder 13, a driving cylinder 14, a rectilinear cylinder 15, a rotating cylinder 16, and a moving cylinder 17, and incorporates an imaging lens 20. The imaging lens 20 includes a first lens group 21 that is fixed to the movable cylinder 17, a second lens group 22 that is held by the rectilinear cylinder 15, a shake correction lens 23, and a focus lens 24.

  The imaging lens 20 is configured such that any or all of the lenses except for the blur correction lens 23 move in the direction of the optical axis in accordance with collapsing, extension, tele-wide (T / W) switching, and focus adjustment. . Each of the “first lens group 21 and second lens group 22” in the present embodiment means a lens group as a moving unit, not an optically divided lens group.

  The focus lens 24 is moved in the optical axis direction by a focus lens driving device (not shown) to perform focusing. An image sensor 19 made of a CCD or the like is fixed to the base 18 on the back side of the focus lens 24.

  The fixed cylinder 13 is fixed to the base 18, and movement in the optical axis direction and rotation around the optical axis are restricted. The drive cylinder 14 is disposed on the inner surface of the fixed cylinder 13. The drive cylinder 14 receives a driving force from a zoom drive motor (not shown) and moves in the optical axis direction while rotating with respect to the fixed cylinder 13 using the optical axis as a rotation axis. The zoom drive motor rotates normally or reversely according to the operation of a zoom T / W switching lever (not shown). The rotational drive force of the zoom drive motor is transmitted to the drive cylinder 14 via a drive gear (not shown).

  The rectilinear cylinder 15 is disposed on the inner surface of the drive cylinder 14. As the drive cylinder 14 rotates, the rectilinear cylinder 15 moves integrally and linearly with the drive cylinder 14 in the optical axis direction without rotation. A slider holding member 34 is fixed to the image forming side (right side in the optical axis direction) of the rectilinear cylinder 15, and the second lens group holding frame (not shown) is located closer to the subject side (in the optical axis direction) than the slider holding member 34. Left).

  The rotating cylinder 16 is disposed on the inner surface of the rectilinear cylinder 15. As the drive cylinder 14 rotates, the rotary cylinder 16 moves in the optical axis direction while rotating integrally with the drive cylinder 14 with the optical axis as a rotation axis with respect to the fixed cylinder 13. A first lens group holding frame 25 is fixed to the moving cylinder 17 on the subject side. The first lens group holding frame 25 holds the first lens group 21. The moving cylinder 17 is disposed on the inner surface of the rotating cylinder 16. The moving cylinder 17 has a subject-side front surface 17 a protruding from the rotating cylinder 16 and moves straight in the optical axis direction without rotation as the rotating cylinder 16 rotates.

  In the housed state shown in FIG. 1, the shake correction lens holding member 32 that holds the shake correction lens 23 rotates to the retracted position retracted from the optical axis and is positioned at a position avoiding the second lens group 22. . For this reason, the second lens group 22 is moved to a position close to the slider holding member 34, thereby realizing a reduction in thickness of the lens barrel 12 in the optical axis direction in the housed state. The second lens group 22 is configured to move in the optical axis direction by a second lens group driving device (not shown).

  As shown in FIGS. 2 and 3, the shake correction lens retracting device 30 includes a shake correction lens 23, a shake correction lens holding member 32, a slider 33, a slider holding member 34, and a voice coil motor (Voice Coil Motor: (Hereinafter simply referred to as VCM) 35, a slider holding member moving mechanism 36, a retracting action member 37, a slider initial position moving mechanism 38, and a fixed base 39.

  The blur correction lens 23 corrects the blur of the subject image, and is held by the blur correction lens holding member 32. The shake correction lens holding member 32 includes a holding frame 32a for holding the shake correction lens 23, an arm 32b, an attachment shaft 32c, an engaging portion 32d (see FIG. 3), and a locking piece 32e. The arm 32b has one end connected to the holding frame 32a and the other end connected to the mounting shaft 32c. The attachment shaft 32c is attached to the slider 33 via the attachment bracket 33b in the optical axis direction. A torsion spring 41 is attached to the attachment shaft 32c. One end of the torsion spring 41 is locked to the mounting bracket 33b, and the other end is locked to the arm 32b to urge the arm 32b in the clockwise direction.

  As shown in FIG. 4, the slider 33 is formed in a substantially rectangular plate shape. In addition to the mounting bracket 33b, the subject-side surface (front surface) 33a of the slider 33 includes a circular optical axis opening 33c, rectangular coil mounting holes 33d and 33e, a square movement restriction hole 33g, and a guide ball storage hole 33h. Is formed. Further, a locking pin 33f is formed on the subject side surface 33a near the optical axis opening 33c so as to protrude in the optical axis direction. As shown in FIG. 5, the locking piece 32e is locked to the locking pin 33f in a state where the blur correction lens 23 is set on the optical axis. Thereby, the blur correction lens 23 is positioned at the optical axis advance position.

  As shown in FIG. 4, three guide ball storage holes 33h are spaced apart from each other in the circumferential direction at approximately 120 ° intervals around the optical axis opening 33c. The guide ball storage hole 33h stores a guide ball 40 that can roll within the guide ball storage hole 33h.

  The two movement restricting holes 33g are spaced apart from each other in the circumferential direction at an interval of 180 ° with the optical axis opening 33c as the center. A movement restriction pin 34g (see FIG. 3) of the slider holding member 34 enters the movement restriction hole 33g. As shown in FIG. 8, the movement restricting pin 34g is allowed to move within the range of the movement restricting hole 33g because further movement is restricted when it hits the side wall of the movement restricting hole 33g.

  As shown in FIG. 3, on the back surface 33j of the slider 33, three spring mounting brackets 33k are provided in the circumferential direction at approximately 120 ° intervals around the optical axis opening 33c near the outer periphery of the slider 33.

  As shown in FIG. 2, the slider holding member 34 is formed in a disc shape, and a stepped portion 34 b that protrudes in the optical axis direction from a surface (surface) 34 a on the subject side is formed at the center. In addition to the slider 33, a VCM 35 is disposed in the stepped portion 34b. An optical axis opening 34c is formed at the center of the step 34b. Further, a locking pin protruding opening 34d is formed continuously with the optical axis opening 34c. Further, a notch 34e is formed in a part of the outer peripheral edge of the step 34b. From the notch 34e, the corner of the slider 33 and the mounting bracket 33b protrude. The shake correction lens holding member 32 is attached to the mounting bracket 33b, and the shake correction lens holding member 32 is swingably attached to the surface of the step portion 34b.

  Three fixed claws 34 f are formed on the outer peripheral surface of the slider holding member 34 so as to protrude at approximately 120 ° intervals. The fixing claw 34 f is engaged with the inner peripheral surface of the rectilinear cylinder 15 to fix the slider holding member 34 to the rectilinear cylinder 15. A spring mounting bracket 34k is provided at a position corresponding to the spring mounting bracket 33k of the slider 33. A coil spring 44 is hung on the spring mounting brackets 33k and 34k. The coil spring 44 biases the slider 33 so as to be in close contact with the slider holding member 34. Between the slider 33 and the slider holding member 34, the guide ball 40 is inserted into the guide ball storage hole 33 h, and the slider 33 and the slider holding member 34 are held in parallel via the guide ball 40.

  As shown in FIG. 3, a movement restriction pin 34 g is formed on the back surface 34 j of the slider holding member 34 so as to protrude in the optical axis direction at a position corresponding to the movement restriction hole 33 g of the slider 33. The movement restricting pin 34g is inserted into the movement restricting hole 33g while the slider 33 is held in close contact with the slider holding member 34 through the guide ball 40 by the bias of the coil spring 44. . Therefore, even if the slider 33 attempts to move in the XY plane perpendicular to the optical axis with respect to the slider holding member 34, the movement restricting pin 34g hits the wall surface of the movement restricting hole 33g as shown in FIG. Is regulated.

  As shown in FIG. 2, the VCM 35 includes two coils 51 and 52, two magnets 53 and 54, yokes 55, 56 and 57, and a flexible circuit board 58. The coils 51 and 52 are accommodated in the coil mounting holes 33 d and 33 e of the slider 33. Two magnets 53 and 54 are fixed to the yoke 57 at a position facing the two coils 51 and 52. The front yokes 55 and 56 are attached to the surface 34 a side of the slider holding member 34. The back side yoke 57 is attached to the back surface 34 j side of the slider holding member 34. These yokes 55, 56, 57 sandwich the two coils 51, 52 and the two magnets 53, 54. When the coils 51 and 52 of the VCM 35 are energized, the slider 33 moves in the X-axis direction that is the first direction and the Y-axis direction that is the second direction in the XY plane orthogonal to the optical axis.

  The flexible circuit board 58 is composed of a flexible strip-shaped thin plate in which a metal conductor is sandwiched between resin films. The flexible circuit board 58 connects the two coils 51 and 52 to the control circuit 60. A camera shake detection sensor (not shown) is connected to the control circuit 60. The control circuit 60 sends a signal for correcting blurring of the subject image to the two coils 51 and 52 based on the signal from the camera shake detection sensor.

  The slider 33 having the VCM 35, the slider holding member 34, the camera shake detection sensor, and the control circuit 60 constitute a shake correction mechanism 50. As shown in FIG. 5, when the lens barrel 12 is in a shooting state and the shake correction lens 23 is in the optical axis advance position, the shake correction mechanism 50 causes the VCM 35 to move the slider 33 to the slider holding member 34 according to camera shake. Slide in the XY plane. Thereby, the blur of the subject image is corrected by the blur correction lens 23 held by the blur correction lens holding member 32.

  The slider holding member moving mechanism 36 includes, for example, a driving cylinder 14, a rectilinear cylinder 15, a rotating cylinder 16, a moving cylinder 17, and a zoom driving motor (not shown), and the slider holding member 34 is in the photographing position (first position) in the optical axis direction. 1 position) and a storage position (2nd position).

  As shown in FIG. 2, the fixed base 39 is fixed to the base 18. A retraction member 37 is formed on the fixed base 39 so as to protrude from the subject-side surface (front surface) of the fixed base 39 in the optical axis direction. The retracting action member 37 is composed of a part of a cylinder surrounding the attachment shaft 32c of the shake correction lens holding member 32 in a state where the slider holding member 34 is set at the storage position. The retracting action member 37 has a retracting action surface 37a and a storage position holding surface 37b. As shown in FIG. 7, the retracting action surface 37a is formed by cutting out the subject-side end face of the retracting action member 37 in a spiral shape. The storage position holding surface 37b is formed continuously on the retracting action surface 37a in the optical axis direction.

  The slider initial position moving mechanism 38 is configured using a shake correcting mechanism 50, and the control circuit 60 performs the processing shown in FIG. When shooting is finished and the main switch is OFF or no operation is performed within a certain time, the VCM 35 of the shake correction mechanism 50 is energized. By this energization, as shown in FIG. 8, the slider 33 is moved (shifted) to one movement limit with respect to the slider holding member 34.

  Next, the zoom drive motor is energized. With this energization, the slider holding member 34 starts to move from the photographing position to the retracted position. Corresponding to the movement of the slider holding member 34, the tip of the retracting member 37 protrudes from the notch 34 e of the slider holding member 34 as shown in FIG. 11. Eventually, the retracting action surface 37 a of the protruding retracting member 37 hits the engaging portion 32 d of the blur correction lens holding member 32. The retracting action surface 37a is formed in a spiral shape, and the engaging portion 32d slides along the retracting action surface 37a. As a result, the shake correction lens holding member 32 rotates counterclockwise against the bias of the torsion spring 41, and the shake correction lens 23 moves from the optical axis advance position shown in FIG. 5 toward the retracted position shown in FIG. Displace.

  Since the slider 33 is offset with respect to the slider holding member 34 as shown in FIG. 8, the engaging portion 32d of the blur correction lens holding member 32 can always be brought into contact with a certain position of the retracting surface 37a. it can. Therefore, the swinging of the retracted position is started from the advance position of the blur correction lens holding member 32 while the engagement start position of the engaging part 32d with the retracting action surface 37a is always constant. The lens holding member 32 can be swung reliably and smoothly. Further, when the slider 33 is not offset to the slider holding member 34, the retracting action is performed in order to ensure that the engaging portion 32d abuts the retracting action surface 37a within the range of the movement restricting hole 33g of the slider 33. It is necessary to make the surface 37a larger. In this case, the lens barrel 12 cannot be made compact, but this can be solved. Further, since the VCM 35 generates a uniform force in the entire longitudinal direction of the coils 51 and 52, the rotation of the slider 33 can be suppressed without using a guide bar as in Patent Document 1, and the slider 33 is held by a slider holding member. 34 can be easily and quickly offset.

  As shown in FIG. 2, a guide bar 62 is formed on the surface of the fixed base 39 so as to protrude in the optical axis direction. A guide tube 63 is provided on the back surface 33 j of the slider 33 at a position corresponding to the guide rod 62. The guide tube 63 has a guide hole 64 as shown in FIG. A guide rod 62 is fitted into the guide hole 64 to guide the slider 33 so as to be movable in the optical axis direction. A tapered guide surface 65 is formed at the edge of the guide hole 64. When the tip of the guide bar 62 is positioned in the guide surface 65, the guide surface 65 guides the insertion of the guide hole 64 of the guide bar 62. By fitting the guide rod 62 to the guide cylinder 63, the slider 33 is held immovably in the XY plane by the fixed base 39 and the slider holding member 34. By the fitting of the guide rod 62 and the guide tube 63, the movement of the slider holding member 34 at the storage position is restricted.

  Note that the engagement start position of the guide rod 62 tip and the guide tube 63 may be changed by changing the length of the guide rod 62 and the guide tube 63 shown in FIG. For example, by setting the fitting start position of the guide rod 62 and the guide cylinder 63 to be just before the engagement between the engaging portion 32d and the retracting action surface 37a, in addition to the shift by the VCM 35, the guide rod 62 and the guide cylinder 63 can be used together. Further, the guide rod 62 and the guide tube 63 may be omitted. In this case, the justification is performed only by the VCM 35.

  Next, the operation of this embodiment will be described. When a main button (not shown) is turned on, the zoom drive motor is energized, and the slider holding member moving mechanism 36 moves the slider holding member 34 from the storage position to the photographing position in the optical axis direction. Due to the movement of the slider holding member 34 from the storage position to the shooting position, the blur correction lens holding member 32 is displaced from the retracted position shown in FIG. 6 to the shooting position shown in FIG. The shake correction lens holding member 32 is urged clockwise by the urging force of the torsion spring 41. As the slider holding member 34 moves from the storage position to the photographing position, the contact portion of the engaging portion 32d changes from the storage position holding surface 37b (see FIG. 7) of the retracting action member 37 to the retracting action face 37a. Then, the blur correction lens 23 is switched from the retracted position to the optical axis entry position, and is ready for photographing. In the photographing enabled state, photographing is performed by pressing the shutter button.

  When a shutter button (not shown) is half-pressed, the focus is locked and the position of the focus lens 24 is fixed to the position at the time when the shutter button is half-pressed. When the shutter button is fully pressed, the shutter is released and shooting is performed. Subject light that has passed through the first lens group 21, the second lens group 22, the shake correction lens 23, and the focus lens 24 is incident on the image sensor 19. The image sensor 19 converts subject light into an analog image signal, which is an electrical signal, and image processing is performed by an electronic circuit (not shown) to record image data on a recording medium.

  In the photographing enabled state, the blur correction mechanism 50 causes the slider 33 to slide with respect to the slider holding member 34 in the XY plane by the VCM 35 according to camera shake. Thereby, the blur of the subject image is corrected by the blur correction lens 23 held by the blur correction lens holding member 32.

  When the photographing is finished and the main switch is turned off or no operation is performed even after a certain period of time, the VCM 35 is energized and the slider 33 is biased as shown in FIG. Next, the zoom drive motor is energized, and the slider holding member 34 moves from the shooting position toward the storage position. In the middle of this movement, the engaging portion 32 d of the shake correction lens holding member 32 hits and engages with the retracting action surface 37 a of the retracting action member 37. By this engagement, the shake correction lens holding member 32 rotates counterclockwise against the bias of the torsion spring 41, and the shake correction lens 23 moves from the optical axis entry position to the retracted position. In the retracted position, the engaging portion 32d hits the storage position holding surface 37b and this state is maintained. Further, as shown in FIG. 1, the second lens group 22 is housed in the space before the blur correction lens 23 is retracted, the tube length of the lens barrel 12 is shortened, and the retracting operation is completed.

  In the above embodiment, as shown in FIG. 8, the slider 33 is moved to the slider holding member 34 by using the VCM 35 so that the movement restriction pin 34 g is brought into contact with the upper right corner portion of the movement restriction hole 33 g. . As shown in FIG. 12, the one-sided direction may be the lower left corner that is opposite to the diagonal direction of the movement restricting hole 33g, the other upper left corner, or the lower right corner.

  In the above embodiment, as shown in FIGS. 2 and 3, the movement restricting hole 33g is provided in the slider 33 and the movement restricting pin 34g is provided in the slider holding member 34. However, the movement restricting hole 33g is moved to the slider holding member 34. A restriction pin 34 g may be provided on the slider 33. Further, although the guide ball storage hole 33h is provided in the slider 33, the guide ball storage hole 33h may be provided in the slider holding member 34, and may be provided in both the slider 33 and the slider holding member 34.

20 imaging lens 21 first lens group 22 second lens group 23 shake correction lens 24 focus lens 30 shake correction lens retracting device 32 shake correction lens holding member 32a holding frame 32d engaging portion 32e locking piece 33 slider 33f locking pin 33 g Movement restriction hole 33 h Guide ball storage hole 34 Slider holding member 34 g Movement restriction pin 35 VCM
36 Slider holding member movement mechanism 37 Retraction action member 37a Retraction action surface 37b Storage position holding surface 38 Slider initial position movement mechanism 39 Fixed base 40 Guide ball 50 Shake correction mechanism 62 Guide rod 63 Guide cylinder 64 Guide hole 65 Guide surface

Claims (7)

An image stabilization lens that corrects image blur,
A shake correction lens holding member for holding the shake correction lens;
The shake correction lens holding member is swingably held, and is displaced between an advance position where the shake correction lens is advanced to the optical axis and a retract position where the shake correction lens is retracted from the optical axis, and is attached toward the advance position. A slider to force the blur correction lens to the advanced position;
A slider holding member that holds the slider movably in a plane perpendicular to the optical axis;
A voice coil motor that moves the slider in a first direction and a second direction orthogonal to the first direction within a plane orthogonal to the optical axis;
A slider holding member moving mechanism for moving the slider holding member to the first position and the second position in the optical axis direction;
With the slider holding member moving in the optical axis direction from the first position to the second position, the engaging portion of the shake correction lens holding member comes into contact, and the shake correction lens is moved from the advanced position to the position. A retracting member that is displaced to a retracted position;
When the slider is moved to the limit of movement relative to the slider holding member by the voice coil motor, and the slider holding member moves from the first position to the second position, the engaging portion of the blur correction lens holding member A lens barrel including a slider initial position moving mechanism for bringing the retracting member into contact with a certain position of the retracting member. At least three guide balls that are provided on opposite surfaces of the slider and the slider holding member and are spaced apart from each other;
The lens barrel according to claim 1, further comprising an urging member that presses the slider against the opposing surface of the slider holding member via the guide ball. The retracting member is
A retracting action surface formed in a spiral around the mounting shaft of the blur correction lens holding member;
The lens barrel according to claim 1, further comprising a storage position holding surface formed continuously in the optical axis direction on the retracting surface.   The slider holding member is moved from the first position to the second position by the slider holding member moving mechanism to shorten the tube length, and the blur correction lens holding member is retracted from the optical axis in the space where the blur correction is performed. The lens barrel according to claim 1, wherein a lens different from the lens is accommodated. The retracting member is formed to protrude in the optical axis direction on the fixed base,
The fixed base has a guide bar that is spaced apart from the retracting member and protrudes in the optical axis direction.
5. The lens barrel according to claim 1, wherein the slider has a guide hole into which the guide rod is inserted and guides the slider so as to be movable in the optical axis direction. 6.   The lens barrel according to claim 5, wherein a tapered guide surface is formed at a distal end portion of the guide rod and an edge portion of the guide hole into which the distal end portion is inserted. The slider holding member is moved from the first position to the second position in the optical axis direction by the slider holding member moving mechanism, and the blur correction lens holding member that is swingably attached to the slider is engaged with the retracting action member, thereby correcting the blur correction lens. Is displaced from the optical axis advance position to the retracted position,
In a state where the slider holding member moves from the first position to the second position, the voice coil motor moves the slider to the movement limit with respect to the slider holding member, and the relationship between the blur correction lens holding member and the retracting member A method for retracting the lens of the lens barrel that makes the start position constant.

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