JPWO2014030677A1 - Lens barrel - Google Patents

Abstract

Provided is a lens barrel having a camera shake correction mechanism that can be reduced in size and cost. In a lens barrel having a camera shake correction mechanism that moves a correction lens in a plane orthogonal to the optical axis of the photographing optical system, the camera shake correction mechanism is fixed to the optical axis and parallel to the optical axis. A first axis, a link member provided to be rotatable about the first axis, a second axis provided on the link member and parallel to the optical axis, and rotatable about the second axis And a lens frame that holds the correction lens.

Description

  The present invention relates to a lens barrel having a camera shake correction mechanism.

  Conventionally, a lens barrel is provided with a camera shake correction mechanism. As an example, the camera shake correction mechanism is configured as follows. A conventional camera shake correction mechanism includes a fixed portion fixed to a lens barrel, a first guide shaft that is provided on the fixed portion and supports a support frame, a support frame that supports the lens frame via a second guide shaft, and correction A lens frame for holding the lens for use. The fixed portion fixed to the lens barrel supports the support frame so that it can be guided in a predetermined direction in a plane orthogonal to the optical axis by the first guide shaft. The support frame supports the lens frame by the second guide shaft so that the lens frame can be guided in a direction orthogonal to the predetermined direction. In other words, a first guide mechanism for guiding the support frame in the first direction is provided in the fixed portion, and a second guide mechanism for guiding the lens frame in the second direction is provided thereon. That is, in this camera shake correction mechanism, the lens frame is movable within a plane orthogonal to the optical axis (see, for example, Patent Document 1).

  As another example, the camera shake correction mechanism includes a fixed portion fixed to the lens barrel, a lens frame holding the correction lens, and a ball held between the fixed portion and the lens frame. A spring that urges the ball in the direction of holding the ball is stretched between the fixed portion and the lens frame. The lens frame is placed so as to be movable with respect to the fixed portion via the ball by the bias of the spring. That is, according to the above configuration, rotation around the optical axis in the lens frame is suppressed, and the lens frame can move in a plane orthogonal to the optical axis (see, for example, Patent Document 2).

  In another example, a camera shake correction mechanism includes both a guide mechanism for performing the above-described camera shake correction and a retraction mechanism. The retracting mechanism retracts a part of the lens to the outside of the optical axis in the collapsed state, thereby reducing the thickness when retracted. In this camera shake correction mechanism, the lens frame that supports the correction lens is rotatably supported by the vibration frame used for camera shake correction. In addition, when the camera shake is retracted, the retraction mechanism rotates the correction lens with respect to the vibration frame and retracts it outside the optical axis (for example, Patent Document 3).

  In addition, a voice coil motor (VCM) is often used as an actuator used for the camera shake correction. The voice coil motor has a moving frame supported so as to be movable in a plane perpendicular to the optical axis with respect to the fixed portion. A permanent magnet is fixed to the moving frame. Further, the hall element and the coil are fixed to the fixed portion so as to face the permanent magnet.

  When camera shake correction is performed by the camera shake correction mechanism, the Hall element outputs a signal corresponding to a change in the magnetic field by the permanent magnet and detects the position of the moving frame.

Japanese Patent Laid-Open No. 3-188430 JP-A-10-319465 JP 2007-199320 A

  However, in the lens barrel described in Patent Document 1, a first axis that guides the support frame in the first direction (first guide mechanism) and a second axis that guides the lens frame in the second direction ( Since there are a second guide mechanism) and members guided along the respective axes, the configuration becomes complicated. Moreover, according to such a structure, there existed a problem that it resulted in the enlargement and cost increase.

  The lens barrel described in Patent Document 2 has a structure that prevents rotation of the lens frame in a plane orthogonal to the optical axis, depending on the balance of biasing by the spring. Therefore, since the rotation of the lens frame cannot be completely prevented, a deviation occurs between the lens position and the sensor output for measuring the lens position. As a result, there is a problem that the camera shake correction performance is deteriorated. In addition, the arrangement of the springs for maintaining the balance of clamping by biasing in a predetermined state may be a restriction on the layout in the camera shake correction mechanism. As a result, there has been a problem that the camera shake correction mechanism and the lens barrel are increased in size.

  Furthermore, in the lens barrel described in Patent Document 3, camera shake correction is performed by moving the entire vibration frame while rotatably supporting the lens frame. According to such a configuration, an object to be moved at the time of camera shake correction is increased in size, and the mass of the object is increased. These cause the size of the actuator that drives the object and the deterioration of the characteristics. Further, in this camera shake correction mechanism, the vibration frame provided with the actuator maintains its position even when retracted. Therefore, it becomes a hindrance when trying to make the lens barrel thin when retracted.

  SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems and to provide a lens barrel having a camera shake correction mechanism capable of reducing the cost while reducing the size.

  In order to solve the above-described problem, the lens barrel according to claim 1 is a lens barrel having a camera shake correction mechanism that moves a correction lens in a plane orthogonal to the optical axis of the photographing optical system. The camera shake correction mechanism includes a first axis fixed in parallel to the optical axis, a link member provided to be rotatable about the first axis, the link member, A second axis parallel to the axis; and a lens frame provided so as to be rotatable about the second axis and holding the correction lens.

  The lens barrel according to a second aspect of the present invention is the lens barrel according to the first aspect of the invention, wherein the amount of rotation of the lens frame when retracted is larger than that during camera shake correction, so that the correction lens is It is retracted from the optical axis.

  According to a third aspect of the present invention, in the lens barrel according to the first aspect, the first restriction portion that restricts the rotation amount of the link member, the second restriction portion that restricts the rotation amount of the lens frame, It is characterized by having.

  According to a fourth aspect of the present invention, in the lens barrel according to the third aspect of the invention, when the rotation of the link member is restricted at one end of the first restricting portion, the second restricting portion is provided on the lens frame. By restricting rotation, when the lens barrel is retracted, the other end of the first restricting portion restricts the rotation of the link member, and the amount of rotation of the lens frame at the time of retracting is larger than that during camera shake correction. The correction lens is retracted from the optical axis at the time of photographing.

  According to a fifth aspect of the present invention, in the lens barrel according to the fourth aspect of the present invention, the lens frame has a driven portion formed around a sleeve through which the second shaft passes, and the driven portion is retracted. When the engaging member is engaged, the amount of rotation of the lens frame when retracted is larger than that during camera shake correction.

  According to a sixth aspect of the present invention, in the lens barrel according to the fifth aspect, the first urging force is applied to urge the lens frame in a returning direction in response to the rotation of the lens frame when retracted. It has the means.

  According to a seventh aspect of the present invention, in the lens barrel according to the sixth aspect, the first urging means does not urge the lens frame at the time of camera shake correction, and the rotation amount of the lens frame is a camera shake. It is characterized by energizing when it becomes larger than the time of correction.

  A lens barrel according to an eighth aspect of the invention is characterized in that, in the invention according to any one of the first to seventh aspects, the lens barrel includes a second urging means for urging the lens frame in the optical axis direction.

  A lens barrel according to a ninth aspect is the lens barrel according to any one of the first to eighth aspects, wherein the lens barrel is disposed on either the lens frame or a facing member facing the lens frame in a shooting state. It has a magnet, the coil arrange | positioned at the other of the said lens frame or the said opposing member, and the Hall element arrange | positioned at the other of the said lens frame or the said opposing member, It is characterized by the above-mentioned.

  A lens barrel according to claim 10 is the lens barrel according to claim 3, wherein the lens is disposed on one of the lens frame or a facing member facing the lens frame in a shooting state, and the lens. A coil disposed on the other side of the frame or the opposing member, and a hall element disposed on the other side of the lens frame or the opposing member, and rotating the link member at at least one end of the first restricting portion. The movement is restricted, and the output of the Hall element is calibrated by bringing the lens frame into contact with a second restriction part.

  A lens barrel according to an eleventh aspect of the present invention is the lens barrel according to any one of the first to tenth aspects, further comprising a shutter unit that is disposed on the optical axis and includes a notch at a part of an outer edge thereof. And the first axis and the second axis are respectively arranged so as to penetrate the notch in a direction parallel to the optical axis.

  According to a twelfth aspect of the present invention, in the invention according to the eleventh aspect, the correction lens is disposed immediately before or after the shutter unit.

  The lens barrel according to claim 13, wherein the lens barrel includes a camera shake correction mechanism that moves a correction lens in a plane orthogonal to the optical axis of the photographing optical system. A lens frame that holds the correction lens and a facing member that faces the lens frame, and one of the lens frame and the facing member is provided with a magnet, and the other is a signal corresponding to the position of the coil and the magnet. When the lens barrel is retracted, the lens frame is withdrawn from the optical axis while holding the magnet or the coil and the position detecting means, and in the optical axis direction with respect to the opposing member. It is also moved to.

  The lens barrel according to a fourteenth aspect is the invention according to the thirteenth aspect, in which the lens and the magnet and the coil or the position detecting unit are arranged so that the optical axis is moved after moving in the optical axis direction. It is located so that it may become a position including the same plane orthogonal to.

  According to a fifteenth aspect of the present invention, in the lens barrel according to the thirteenth or fourteenth aspect, the lens frame is disposed on the image plane side with respect to the facing member, and the lens frame is used as the facing member when retracted. On the other hand, it is moved to the subject side.

  A lens barrel according to a sixteenth aspect is the invention according to any one of the thirteenth to fifteenth aspects, wherein a first axis disposed on the frame holding member and fixed in parallel with the optical axis, and the first axis A link member rotatably provided around the axis, and a second axis parallel to the optical axis provided on the link member, the lens frame having the second axis as an axis It is provided to be rotatable.

  The lens barrel according to claim 17 is the lens barrel according to any one of claims 13 to 16, wherein when the lens barrel is retracted, the rotation amount of the lens frame is larger than that during camera shake correction. The lens is retracted from the optical axis at the time of photographing.

  According to the lens barrel of the present invention, it is possible to provide a lens barrel having a camera shake correction mechanism that can be reduced in size and cost.

The figure when the 2nd group holding | maintenance cylinder of a photography possible state is seen from back. The perspective view of the lens barrel at the time of retraction. FIG. 3 is a perspective view of a lens barrel in a photographing enabled state (wide end). FIG. 3 is a perspective view of a lens barrel in a photographing enabled state (tele end). VV sectional view taken on the line of FIG. VI-VI sectional view taken on the line of FIG. VII-VII line sectional drawing of FIG. The perspective view when the shutter unit is viewed obliquely from the front. The perspective view when a 2nd group holding | maintenance cylinder is seen from diagonally back. The perspective view when a lens frame is seen from diagonally backward. The perspective view when a 2nd group holding | maintenance cylinder is seen from diagonally forward. The figure when the shutter unit is viewed from the front. The perspective view when a lens frame is seen from the front. The figure when a link member is cut | disconnected by the plane orthogonal to an optical axis. The figure of a lens frame etc. of a photography possible state. The figure of a lens frame etc. of a retracted state. The figure which shows the lens frame moved to the right end position. The figure which shows the lens frame moved to the upper end position. The figure which shows the lens frame moved to the lower end position. The figure which shows the structure of a 1st biasing means. The figure which shows the structure of a 1st biasing means. The perspective view when a part of fixed cylinder is seen from diagonally forward. The figure which looked at the 2nd group maintenance cylinder of the photography possible state concerning a 2nd embodiment from back. The perspective view which shows the lens frame etc. in a photography possible state. The perspective view which shows the lens frame etc. at the time of retraction. The side view of the lens frame at the time of retraction. The side view of the lens frame in a photography possible state. Sectional drawing at the time of collapsing which concerns on 2nd Embodiment.

(First embodiment)
The lens barrel 1 according to the first embodiment will be described with reference to the drawings. FIG. 1 is a view of the second group holding cylinder 70 constituting the lens barrel 1 when viewed from the rear (image sensor side) in the optical axis A. FIG.

  In the following description, as shown in FIG. 1, when it is assumed that the short hand is rotated clockwise around the optical axis A of the photographing optical system, the direction corresponding to 3 o'clock when viewed from the rear in the optical axis A is the right direction. May be described. Similarly, a direction corresponding to 6 o'clock may be described as a downward direction, a direction corresponding to 9 o'clock as a left direction, and a direction corresponding to 12 o'clock as an upward direction. Further, the left-right direction may be described as the X direction, and the up-down direction may be described as the Y direction. Further, in the optical axis direction, the imaging target side may be described as the front, the imaging element side as the rear, and the optical axis direction as the front-back direction.

  FIG. 2 is a perspective view of the lens barrel 1 when retracted (not photographed). FIG. 3 is a perspective view of the lens barrel 1 in the wide state, which is one of the photographable states. FIG. 4 is a perspective view of the lens barrel 1 during telephoto, which is one of the photographable states. 5 is a cross-sectional view taken along line VV in FIG. 6 is a sectional view taken along line VI-VI in FIG. 7 is a sectional view taken along line VII-VII in FIG.

  2-7, the lens barrel 1 includes a fixed cylinder 10, a rectilinear cylinder A20, a rotating cylinder A30, a rectilinear cylinder B40, a front cylinder 50, a rotating cylinder B60, a second group holding cylinder 70, a shutter unit 80, A lens frame 90 and a photographing optical system are included.

  The photographing optical system includes a first optical element 11, a second optical element 12, and a correction lens 100 (see FIGS. 1 and 5 to 7). Hereinafter, the correction lens group may be simply referred to as a correction lens 100. In the following description, a zoom photographing optical system composed of three groups will be described, but the present embodiment is not limited to this example.

  The correction lens 100 is displaced in the X direction and the Y direction within a plane orthogonal to the optical axis of the photographing optical system during photographing. Due to this displacement, image blur of the subject image due to camera shake is reduced.

(Fixed cylinder 10)
The fixed cylinder 10 is provided with an image sensor fixing portion, a second optical element 12, and an output gear 14 (see FIGS. 2 to 4). The output gear 14 is rotated by a motor (not shown). The image sensor fixing portion is a flat plate portion provided at the rear end portion in the optical axis direction of the lens barrel. A CCD (Charge Coupled Device) type image sensor, a C-MOS (Complementary Metal Oxide Semiconductor) type image sensor, or the like is used as the imaging element. The image sensor converts a subject image formed by the photographing optical system into an electrical signal. The second optical element is disposed behind the first optical element in the optical axis. The output gear 14 rotates the rotary cylinder A30.

  On the inner surface of the fixed cylinder 10, there are a first guide (not shown) for guiding the rectilinear cylinder A20 in the optical axis direction and a first cam (not shown) for moving the rotary cylinder A30 in the optical axis direction. Provided.

(Straight advance cylinder A20)
The rectilinear cylinder A20 is moved in the optical axis direction integrally with the rotary cylinder A30 by being coupled to the rotary cylinder A30 and a bayonet. The rectilinear cylinder A20 is guided in the optical axis direction by the first guide. On the inner surface of the rectilinear cylinder A20, there are a second guide (not shown) for guiding the rectilinear cylinder B40 in the optical axis direction and a second cam (not shown) for moving the rotary cylinder B60 in the optical axis direction. Provided.

(Rotating cylinder A30)
The rotary cylinder A30 has a drive gear 13 at its rear end. The drive gear 13 is meshed with the output gear 14. The rotating cylinder A30 is moved in the optical axis direction by the first cam while rotating as the drive gear 13 is rotated. A transmission key (not shown) for transmitting the rotational force to the rotary cylinder B60 and a through hole (not shown) through which the cam pin of the rotary cylinder B60 passes are provided on the inner surface of the rotary cylinder A30.

(Straight cylinder B40)
The rectilinear cylinder B40 is moved in the optical axis direction integrally with the rotating cylinder B60 by being bayonet-coupled with the rotating cylinder B60. The rectilinear cylinder B40 is guided in the optical axis direction by the second guide. On the inner surface of the rectilinear cylinder B40, a third guide (not shown) for guiding the front cylinder 50 in the optical axis direction and a fourth guide (not shown) for guiding the second group holding cylinder 70 in the optical axis direction. And have. The third guide and the fourth guide are provided integrally.

(Front tube 50)
The front tube 50 is guided in the optical axis direction by the third guide. The front cylinder 50 is moved in the optical axis direction by a third cam (not shown) of the rotary cylinder B60. The first optical element 11 is fixed to the front tube 50.

(Rotating cylinder B60)
By transmitting the rotation of the rotary cylinder A30 to the rotary cylinder B60, the rotary cylinder B60 is moved in the optical axis direction by the second cam while rotating. A third cam for moving the front cylinder 50 straight in the optical axis direction is provided on the outer surface of the rotary cylinder B60, and a second cam for moving the second group holding cylinder 70 straight in the optical axis direction on the inner surface of the rotary cylinder B60. Four cams (not shown) are provided.

(2 group holding cylinder 70)
Next, the second group holding cylinder 70 will be described with reference to FIG. 1 and FIGS. FIG. 8 is a perspective view of the shutter unit as viewed obliquely from the front. FIG. 9 is a perspective view of the second group holding cylinder as viewed obliquely from the rear. FIG. 10 is a perspective view of the lens frame when viewed obliquely from the rear. FIG. 11 is a perspective view of the second group holding cylinder as viewed obliquely from the front.

  As shown in FIGS. 1 and 9 to 11, the second group holding cylinder 70 includes a shutter unit 80, a lens frame 90, a first shaft 111, a second shaft 112, a link member 113, and a first biasing force. Means 200 are provided.

  The second group holding cylinder 70 includes a cylinder axis disposed along the optical axis, a second restricting portion 712, and a pair of flanges 71.

  As shown in FIGS. 9 and 11, the pair of flanges 71 includes a front end portion of the second group holding cylinder 70 at the front position of the shutter unit 80 in the optical axis direction and a second group holding cylinder at the rear position of the shutter unit 80. 70 at the rear end. The distance between the pair of front and rear flanges 71 in the optical axis direction has a sufficient length in the optical axis direction. In the example shown in FIG. 1, the flange 71 on the front end side is provided in the range from approximately 7 o'clock to approximately 9 o'clock along the inner periphery of the second group holding cylinder 70. A first restricting portion 711 that is a hole for restricting the amount of rotation is provided at the approximately 8 o'clock position of the flange 71 on the front end side. An end portion of the second shaft 112 described later is inserted into the first restricting portion 711. With this configuration, the amount of rotation of the second shaft 112 is restricted, and the amount of rotation of the lens frame 90 in the substantially left-right direction is limited. That is, the amount of rotation of the correction lens 100 at the time of camera shake correction is restricted within a limited range (see FIGS. 17 and 18).

  As shown in FIG. 1, the second restricting portion 712 is provided along the inner periphery of the second group holding cylinder 70 at a position at approximately 12:00. The second restricting portion 712 includes an upper groove wall 713, a lower groove wall 714, and a left groove wall 715. The right end of the second restricting portion 712 is opened. A regulated portion 91 provided on the lens frame 90 is inserted into the second regulating portion 712. Further, when the second shaft 112 abuts on the left end of the first restricting portion 711, movement in the substantially vertical direction due to the rotation of the lens frame 90 is restricted. With this configuration, the amount of rotation of the correction lens 100 at the time of adjustment is restricted within a limited range. The relationship between the regulated part 91 and the second regulating part 712 will be described later.

  When the lens barrel 1 is retracted, when the correction lens 100 is retracted from the above limit range, the lens frame is in a state where the second shaft 112 is in contact with the right end of the first restricting portion 711. 90 is rotated. As a result, the regulated portion 91 is detached from the open portion at the right end of the second regulating portion 712. Further, as shown in FIGS. 1 and 9, the second group holding cylinder 70 passes the correction lens 100 and its peripheral portion between about 5 o'clock and about 7 o'clock with about 6 o'clock as the center. Passage 72 is provided. When the regulated portion 91 is removed by the passage port 72 and the lens frame 90 and the correction lens 100 are further rotated, the correction lens 100 is retracted to a position of approximately 6 o'clock from the optical axis.

(Shutter unit 80)
Next, the shutter unit 80 will be described with reference to FIG. 1 and FIGS. FIG. 12 is a front view of the shutter unit 80 as viewed from the front.

  As shown in FIGS. 1 and 8 to 12, the shutter unit 80 is fixed in the second group holding cylinder 70.

  In the example illustrated in FIG. 9, the shutter unit 80 (see FIG. 8) is disposed in the vicinity of the front of the correction lens 100. As shown in FIG. 12, the shutter unit 80 includes a notch 81 at a part of the outer edge. The notch 81 is provided between approximately 3 o'clock and approximately 5 o'clock in FIG. 12 (approximately 7 o'clock to approximately 9 o'clock in FIG. 1).

  As shown in FIGS. 9 and 11, the first shaft 111, the second shaft 112, and the link member 113 are disposed in the notch 81. These are used when the camera shake correction mechanism 110 and the correction lens 100 are retracted from the optical axis. Even if the camera shake correction mechanism 110 and the retracting mechanism are provided by the notch 81, it is possible to suppress an increase in the diameter of the second group holding cylinder 70. Further, the first shaft 111 and the second shaft 112 can be disposed through the front and back of the shutter unit 80. With this configuration, the axial length can be made sufficiently long. In addition, the inclination of the lens frame 90 with respect to the optical axis can be suppressed. Further, the mounting accuracy of the lens frame 90 can be increased. The same effect can be obtained even when the shutter unit 80 is disposed at a position near the rear of the correction lens 100.

  As shown in FIGS. 9 and 11, a light shielding means for shielding the notch 81 is provided. Thereby, light leakage can be prevented. An example of the light shielding means is the flange 71 described above. The flange 71 is disposed forward and backward in the optical axis direction with the notch 81 interposed therebetween. That is, the flange 71 is configured so that light does not leak from the notch 81 or light is not inserted into the notch 81. The flange 71 has a function as a light shielding means, and further has a function of supporting the first shaft 111 and the like as will be described later. Also from this point, it is possible to reduce the size and the cost.

  Next, the basic operation of the lens barrel 1 will be described with reference to FIGS.

(Collapsed state-ready to shoot)
In the retracted state shown in FIGS. 2 and 5, the first optical element 11 fixed to the front cylinder 50 and the second optical element 12 held by the fixed cylinder 10 are close to each other, and the correction lens 100 is off the optical axis. Is evacuated.

  In the retracted state shown in FIGS. 2 and 5, when the output gear 14 is rotated in the forward direction, for example, the rotation is transmitted to the rotating cylinder A30 and further to the rotating cylinder B60. The rotating cylinder A30 is moved forward along the optical axis direction by the first cam of the fixed cylinder 10 while rotating. The rectilinear cylinder A20 is guided by the first guide of the fixed cylinder 10, and is moved forward along the optical axis direction together with the rotating cylinder A30 without rotating.

  The rotary cylinder B60 is rotated and moved forward along the optical axis direction by the second cam of the rectilinear cylinder A20. The rectilinear cylinder B40 is guided by the second guide of the rectilinear cylinder A20, and is moved forward along the optical axis direction together with the rotating cylinder B60 without rotating.

  When the rotating cylinder B60 is rotated, the front cylinder 50 is guided by the third guide of the rectilinear cylinder B40 and is moved forward along the optical axis direction by the third cam of the rotating cylinder B60 (FIGS. 3 and FIG. 3). 6). The state shown in FIG. 3 and FIG. 6 is a photographing enabled state and a wide end state. In this state, since the front cylinder 50 is largely moved forward with respect to the fixed cylinder 10, a gap on the optical axis between the first optical element 11 and the second optical element 12 is widened. In the transition process from the retracted state to the wide end, the lens frame 90 is largely rotated about the second axis 112, and the correction lens 100 returns to the widened optical axis. At the wide end in the photographing enabled state, the lens frame 90 is rotated about the first axis 111 and / or the second axis 112, so that the correction lens 100 can be moved to perform camera shake correction.

(Variation from wide end to telephoto end)
When the output gear 14 is further rotated in the forward direction from the wide end state shown in FIGS. 3 and 6 in the photographing enabled state, the rotating cylinder A30 rotates while the rotating cam A30 is rotated in the optical axis direction by the first cam of the fixed cylinder 10. (See FIGS. 4 and 7). The rectilinear cylinder A20 is guided by the first guide of the fixed cylinder 10, and is moved forward along the optical axis direction together with the rotating cylinder A30 without rotating.

  When the rotary cylinder B60 is rotated, the second group holding cylinder 70 is guided by the fourth guide of the rectilinear cylinder B40 and is moved forward along the optical axis direction by the fourth cam of the rotary cylinder B60. Zoom to the telephoto end shown in. Similarly to the above, the lens frame 90 is attached to the lens frame 90 at each desired position from the photographing enabled state (wide end) shown in FIGS. 3 and 6 to the photographing ready state (tele end) shown in FIGS. By rotating about the first axis 111 and / or the second axis 112, the correction lens 100 held by the lens frame 90 is moved. With this operation, camera shake correction is performed.

(Variation from tele end to wide end)
When the output gear 14 is rotated, for example, in the reverse direction from the tele end state shown in FIGS. 4 and 7 in the photographing enabled state, the rotation is transmitted to the rotary cylinder A30. Further, the rotation is transmitted to the rotary cylinder B60.

  The rotary cylinder A30 is moved rearward along the optical axis direction by the first cam of the fixed cylinder 10 while rotating. The rectilinear cylinder A20 is guided by the first guide of the fixed cylinder 10, and is moved in the optical axis direction together with the rotating cylinder A30 without rotating.

  When the rotating cylinder B60 is rotated, the second group holding cylinder 70 is guided by the fourth guide of the rectilinear cylinder B40 and is moved rearward along the optical axis direction by the fourth cam of the rotating cylinder B60 (FIGS. 3 and FIG. 3). 6).

(Transition from shooting ready state to retracted state)
When the output gear 14 is further rotated in the reverse direction from the wide end state in the photographing enabled state, the rotary cylinder A30 is moved rearward along the optical axis direction by the first cam of the fixed cylinder 10 while rotating. The The rectilinear cylinder A20 is guided by the first guide of the fixed cylinder 10, and is moved in the optical axis direction together with the rotating cylinder A30 without rotating.

  When the rotary cylinder B60 is rotated, the rotary cylinder B60 is moved rearward along the optical axis direction by the second cam of the rectilinear cylinder A20. The rectilinear cylinder B40 is guided by the second guide of the rectilinear cylinder A20, and is moved in the optical axis direction together with the rotating cylinder B60 without rotating.

  When the rotating cylinder B60 is rotated, the front cylinder 50 is guided by the third guide of the rectilinear cylinder B40, and is moved rearward along the optical axis direction by the third cam of the rotating cylinder B60. As a result of this operation, the lens barrel 1 is shifted to the retracted state (see FIGS. 2 and 5).

  In the retracted state shown in FIGS. 2 and 5, the first optical element 11 and the second optical element in the optical axis direction are moved when the front cylinder 50 is largely moved rearward with respect to the fixed cylinder 10 and approaches the fixed cylinder 10. The gap between the elements 12 is narrowed. Thus, in the process of shifting from the wide end state to the retracted state in the photographing state, the lens frame 90 is rotated more than the time of camera shake correction with the second shaft 112 as an axis, so that the correction lens 100 is moved to the optical axis. Evacuated outside. With this configuration, it is possible to reduce the thickness of the lens barrel 1 when retracted.

  Next, a configuration (camera shake correction mechanism 110) that performs camera shake correction by rotating the lens frame 90 about the first axis 111 and / or the second axis 112 will be described. In addition, a configuration (retraction mechanism) in which the correction lens 100 is largely retracted out of the optical axis when the lens barrel 1 is retracted will be described.

[Camera Shake Correction Mechanism 110]
First, the camera shake correction mechanism 110 will be described with reference to FIGS. 1, 9 to 11, and FIGS. 13 to 16. Thereafter, the retracting mechanism will be described. FIG. 13 is a perspective view of the lens frame 90 when viewed obliquely from the front.

  As shown in FIGS. 1, 9 to 11, and 13, the camera shake correction mechanism 110 includes a first shaft 111, a second shaft 112, a link member 113, and a lens frame 90.

(First axis 111)
As shown in FIG. 1, the first shaft 111 is fixed at a substantially 9 o'clock position of the flange 71. As described above, the length of the first axis 111 is spanned between the pair of front and rear flanges 71, has a sufficient length, and the inclination of the first axis 111 with respect to the optical axis is kept small. The first axis 111 may be an axis that is fixed with respect to the optical axis and substantially parallel to the optical axis. In addition, in the description of the present embodiment, “fixed with respect to the optical axis” indicates that the object does not move in a plane perpendicular to the optical axis.

(Link member 113)
The link member 113 is pivotally supported so as to be rotatable about the first shaft 111. The link member 113 is disposed along the inner periphery of the second group holding cylinder 70. In the example of FIG. 1, the link member 113 is disposed in a section from approximately 7 o'clock to approximately 9 o'clock. This section corresponds to a section in which the notch 81 of the shutter unit 80 is provided (see FIGS. 1 and 12). With the second group holding cylinder 70 and the cutout portion 81, the link member 113 can be arranged with high space efficiency. The link member 113 is disposed so as to be fitted between the pair of front and rear flanges 71 in the optical axis direction. The distance between the pair of front and rear flanges 71 is sufficiently long because it is disposed across the front and back of the shutter unit 80 through the notch 81 in the optical axis direction. Similarly, the link member 113 fitted in the gap is also sufficiently long in the optical axis direction. According to this configuration, the tilting of the first shaft 111 and the link member 113 with respect to the optical axis can be suppressed.

  Since one end of the link member 113 is supported so as to be rotatable about the long first shaft 111, the inclination of the link member 113 can be kept small. Thereby, the attachment accuracy of the link member 113 can be improved. As a result, the mounting accuracy of the lens frame 90 can be increased.

  FIG. 14 is a view when the link member 113 is cut along a plane orthogonal to the optical axis. FIG. 15 is a perspective view of the lens frame and the like in a photographing enabled state. FIG. 16 is a perspective view when the lens frame is retracted out of the optical axis.

  As shown in FIGS. 14 to 16, the other end portion of the link member 113 has a convex portion 114 and a concave portion 115 whose distance from the one end portion is shorter than the convex portion 114. At the other end portion of the link member 113, the convex portion 114 is provided so as to sandwich the concave portion 115 from the front edge portion to the rear edge portion (see FIG. 15). In addition, in order to increase the mounting accuracy of the lens frame 90, the opening width of the recess 115 may be made sufficiently long in the optical axis direction.

(Second axis 112)
As shown in FIGS. 9 and 11, the second shaft 112 is provided at the other end of the link member 113. In addition, the 2nd axis | shaft 112 should just be provided in the position different in the link member 113 from the position in which the 1st axis | shaft 111 is provided. The second axis 112 is an axis parallel to the optical axis. In order to increase the mounting accuracy of the lens frame 90, the second shaft 112 is configured to have a sufficient guide length so as to be bridged between the convex portion 114 on the front edge side and the convex portion 114 on the rear edge side. It may be. According to such a configuration, the inclination of the second axis 112 with respect to the optical axis can be kept small. The front end portion and the rear end portion of the second shaft 112 pass through the convex portion 114 on the front edge portion side and the convex portion 114 on the rear edge portion side, respectively (see FIG. 15).

  The front end portion and the rear end portion of the second shaft 112 are inserted into a first restriction portion 711 that is a hole for limiting the amount of rotation of the link member 113. By appropriately setting the relationship between the diameter of the second shaft 112 and the width in the left-right direction (X direction) of the first restricting portion 711, the second shaft 112 can be rotated in the substantial X direction during camera shake correction. Range is defined. That is, a range in which the correction lens 100 can rotate in the substantially X direction is determined (see FIGS. 1 and 11).

(Lens frame 90)
As shown in FIGS. 1 and 13, the lens frame 90 holds the correction lens 100. As shown in FIGS. 15 and 16, the lens frame 90 is fitted at the base end portion of the link member 113 on the second shaft 112 side, the second shaft 112 passes therethrough, and the second shaft 112 is used as an axis. It can be turned.

  Since the base end portion of the lens frame 90 is sufficiently long in the optical axis direction, the tilt of the base end portion of the lens frame 90 is suppressed to be small with respect to the second axis 112 (relative to the plane orthogonal to the second axis 112) Is possible. Thereby, the mounting accuracy of the lens frame 90 can be increased.

  As shown in FIGS. 1, 13, and 14, the lens frame 90 is provided with a restricted portion 91, a locking portion 92 (see FIG. 20), a contact portion 93, and a pushed portion 94.

  As shown in FIG. 1, the restricted portion 91 is provided at a position of approximately 12:00 on the lens frame 90. The restricted portion 91 is located between the upper groove wall 713 and the lower groove wall 714 of the second restricting portion 712 in the photographing enabled state. The relationship between the size of the restricted portion 91 and the vertical width of the second restricting portion 712 (the interval between the upper groove wall 713 and the lower groove wall 714, that is, the width in the Y direction) is appropriately set. With this setting, a range in which the lens frame 90 can be rotated in the Y direction during camera shake correction is determined. That is, a range in which the correction lens 100 can be rotated in the vertical direction (Y direction) is determined. The locking portion 92 and the contact portion 93 are disposed around the second shaft 112 (see FIGS. 14, 20, and 21). Details of the locking portion 92 and the contact portion 93 will be described later.

  Camera shake correction can be performed using the camera shake correction mechanism 110 described above. During camera shake correction, the lens frame 90 is rotated about the first axis 111 and / or the second axis 112. By this operation, the correction lens 100 held by the lens frame 90 is moved within the limited range of the surface orthogonal to the optical axis.

  As described above, by configuring the guide lengths of the first shaft 111 and the second shaft 112 to be long, the mounting accuracy of the lens frame 90 can be increased, and the posture of the link member 113 and the lens frame 90 can be maintained. In addition, the inclination of the lens frame 90 with respect to the optical axis can be suppressed. Furthermore, the structure for that can be realized by the same configuration using the first shaft 111, the second shaft 112, and the link member 113. Therefore, it is possible to reduce the size and the cost with a simple configuration. Furthermore, the configuration in which the first shaft 111 and the second shaft 112 are rotated is less affected by friction than the configuration in which the shaft is arranged on a plane orthogonal to the optical axis and is slid as a guide. Therefore, the camera shake correction performance can be improved.

In the description of the present embodiment, when “the lens frame 90 is rotated about the first axis 111 and / or the second axis 112” is described,
(1) rotating the lens frame 90 around the first shaft 111 integrally with the link member 113;
(2) Rotating the lens frame 90 about the second shaft 112 without rotating the link member 113;
(3) rotating the link member 113 about the first shaft 111 and rotating the lens frame 90 about the second shaft 112;
Indicates. Further, the mode is different between the case where “the rotation of the lens frame 90” is regarded as the rotation around the axis and the case where it is regarded as the movement of the lens frame 90 in camera shake correction. That is, in the camera shake correction, the lens frame 90 and the correction lens 100 are slightly moved within the limit range. Therefore, the movement of the correction lens 100 is effectively regarded as a linear minute movement.

  Next, the rotation amount restriction of the lens frame 90 will be described in more detail with reference to FIGS. 1 and 17 to 19. FIG. 1 is a diagram showing the lens frame 90 moved to the left end position. FIG. 17 is a diagram showing the lens frame 90 moved to the right end position. FIG. 18 is a diagram showing the lens frame 90 moved to the upper end position. FIG. 19 shows the lens frame 90 moved to the lower end position.

(Regulation of rotation amount of lens frame 90)
As shown in FIG. 1, when the lens frame 90 is moved to the left, the second shaft 112 contacts the left edge of the first restricting portion 711. As shown in FIG. 17, when the lens frame 90 is moved to the right, the second shaft 112 contacts the right edge of the first restricting portion 711. As shown in FIG. 18, when the lens frame 90 is moved upward in a state where the second shaft 112 is in contact with the left edge of the first restricting portion 711, the restricted portion 91 becomes the upper groove wall of the second restricting portion 712. 713 abuts. As shown in FIG. 19, when the lens frame 90 is moved downward in a state where the second shaft 112 is in contact with the left edge of the first restricting portion 711, the restricted portion 91 becomes the lower groove wall of the second restricting portion 712. 714 abuts.

  On the other hand, when the second shaft 112 is in contact with the right edge of the first restricting portion 711, the right end of the second restricting portion 712 is open. In this state, the downward movement of the restricted portion 91 when the lens frame 90 is rotated downward is not restricted. In a state where the second shaft 112 is in contact with the right edge of the first restricting portion 711, the first contact piece 205 (see FIGS. 20 and 21) of the bias control member 204 provided on the lens frame 90, The edge of the recessed part 115 of the link member 113 contacts. Due to this state, the downward movement of the restricted portion 91 is restricted. The regulation in this direction will be described later. According to this configuration, at the time of camera shake correction, the movement of the lens frame 90, that is, the correction lens 100 is restricted within a limited range.

  The “restricted range” refers to a range in which the lens frame 90 and the correction lens 100 can move during camera shake correction.

(Position detection means)
Next, the position detection means 300 will be described with reference to FIGS.

  As shown in FIGS. 1, 10, and 13, the position detection unit 300 includes a magnet 301 and a Hall element 302.

  As shown in FIG. 1, the magnets 301 are disposed at the 9 o'clock position and the 12 o'clock position of the lens frame 90, respectively.

  The Hall element 302 shown in FIG. 13 is arranged on the outer surface of the shutter unit 80 so as to face the magnet 301. The Hall element 302 detects the position of the lens frame 90 in the X direction and the Y direction orthogonal to each other on a plane orthogonal to the optical axis. By detecting the position of the lens frame 90 using the magnet 301 and the Hall element 302, the correction lens 100 can be controlled with high accuracy and the configuration is simple. The Hall element 302 may be disposed in the second group holding cylinder 70.

(Calibration of location information)
Next, calibration of position information will be described. The position information of the lens frame 90 detected by the Hall element 302 may be different from the actual position information of the lens frame 90. In this example, the detected position information is calibrated based on predetermined position information of the lens frame 90.

  For example, outputs when the lens frame 90 is positioned at both ends of the first restricting portion and the second restricting portion are detected, and the center thereof is set as the center position of the lens frame 90. Further, the position information is calibrated from the relationship between the amount of movement between both ends obtained in advance and the output. Note that the configuration of the position information is not limited to the embodiment.

  By correcting the position information of the lens frame 90, it is possible to improve the performance of camera shake correction. This calibration is performed by a control circuit (not shown) for correcting camera shake.

  A means for moving the correction lens 100 includes a magnet 301 and a coil 303. The coil 303 is disposed on the outer surface of the shutter unit 80 (not shown in FIGS. 10 and 13). The coil 303 is disposed so as to face the magnet 301. Note that the coil 303 may be disposed in the second group holding cylinder 70.

  In the camera shake correction, the magnet 301 receives a force from the coil 303, and the lens frame 90 rotates about the first shaft 111 and / or the second shaft 112. By this rotation, the correction lens 100 moves in a plane orthogonal to the optical axis. At this time, the position of the lens frame 90 is detected by the Hall element 302, and control is performed so that the lens frame 90 becomes a desired position according to the detection result. Since the lens frame 90 is driven using the magnet 301 and the coil 303, the size and cost can be reduced, and the configuration is simple. In the embodiment, the magnet 301 is disposed on the lens frame 90, and the hall element 302 and the coil 303 are disposed on the shutter unit 80 (or the second group holding cylinder 70). However, the configuration is not limited to this. For example, the reverse mode, that is, the magnet 301 may be disposed in the shutter unit 80 (or the second group holding cylinder 70), and the Hall element 302 and the coil 303 may be disposed in the lens frame 90. That is, the shutter unit 80 or the second group holding cylinder 70 corresponds to an example of a facing member.

  Further, as will be described later, when the lens frame 90 is retracted out of the optical axis, the coil 303 and the magnet 301 are not opposed to each other, so that a driving force cannot be generated. Therefore, in the range where the coil 303 and the magnet 301 are opposed to each other, camera shake correction is performed by driving with the coil 303. On the other hand, the movement of the lens frame 90 from the retracted position toward the range is performed by the biasing force of the biasing spring 201 of the first biasing means 200.

[Evacuation mechanism]
Next, the retracting mechanism will be described with reference to FIGS. 14 and 20 to 22. FIG. 14 is a view showing a state where the lens frame 90 is retracted out of the optical axis and receives a biasing force in the returning direction. FIG. 20 is a diagram illustrating a state when the generation and disappearance of the urging force are switched. FIG. 21 is a diagram illustrating a state at the time of camera shake correction in which the lens frame 90 is restored and the urging force disappears.

  As shown in FIGS. 14, 20, and 21, the retracting mechanism includes a first urging unit 200 in addition to the first shaft 111, the second shaft 112, and the link member 113 that are used as the configuration of the camera shake correction mechanism 110. Have As described above, since a common configuration is used for the camera shake correction mechanism 110 and the retracting mechanism, it is possible to reduce the size and the cost.

(First biasing means 200)
Next, the first biasing means 200 will be described with reference to FIGS. 14 and 20 to 22. FIG. 22 is a perspective view of the fixed cylinder as viewed obliquely from the front.

  As shown in FIGS. 14 and 20 to 22, the first biasing means 200 includes a biasing spring 201 and a biasing control member 204.

(Biasing control member 204)
First, the bias control member 204 will be described. The urging control member 204 is provided so as to be rotatable about the second shaft 112. The urging control member 204 includes a first contact piece 205 and a second contact piece 206.

(Biasing spring 201)
Next, the biasing spring 201 will be described. The biasing spring 201 is a winding spring wound around the outer periphery of the biasing control member 204. One end of the biasing spring 201 is locked to the second contact piece 206, and the other end is locked to the locking portion 92 of the lens frame 90.

  As shown in FIG. 14, when the lens frame 90 is located outside the limit range, the edge of the concave portion 115 of the link member 113 comes into contact with the first contact piece 205 (the contact state is indicated by an arrow in FIG. 14). portion). In this state, the counterclockwise rotation of the bias control member 204 is restricted. On the other hand, since the clockwise rotation of the lens frame 90 is not restricted, the lens frame 90 is urged by the urging spring 201 and is rotated in a direction within the restricted range to return (FIGS. 20 and 21). reference). That is, when the lens frame 90 is rotated counterclockwise in a state where the first contacted piece 205 is in contact with the edge of the concave portion 115, the lens frame 90 is moved in the optical axis direction by the biasing spring 201. It is energized in the direction to return.

  As shown in FIG. 20, when the lens frame 90 is positioned at a boundary point between the limit range and the limit range, the contact portion 93 of the lens frame 90 contacts the second contacted piece 206. At this time, the biasing spring 201 biases between the locking portion 92 and the contact portion 93 of the lens frame 90. Therefore, the lens frame 90 is not rotated by the biasing spring 201.

  As shown in FIG. 21, when the lens frame 90 is positioned within the limit range, the contact portion 93 of the lens frame 90 contacts the second contacted piece 206. In this state, the lens frame 90 is not rotated by the biasing of the biasing spring 201. Further, the edge of the recess 115 is separated from the first contact piece 205, and a gap is formed between them. Due to the presence of this gap, the lens frame 90 is moved within the limit range in the state in which the urging by the urging spring 201 is released at the time of camera shake correction. In FIG. 21, a gap generated between the edge of the recess 115 and the first contact piece 205 is indicated by an arrow.

  In the above embodiment, the biasing spring 201 and the biasing control member 204 constitute the first biasing means 200. According to such a configuration, the state of biasing by the biasing spring 201 for limiting the rotation of the lens frame 90 can be switched at the boundary between the limit range and the limit range. As a result, the biasing spring 201 does not bias the lens frame 90 within the limited range, so that the lens frame 90 can be efficiently moved without load. Further, since the urging spring 201 urges the lens frame 90 in the direction within the limit range outside the limit range, the movement of the lens frame 90 toward the outside of the limit range can be restricted. According to such a configuration, it is possible to restrict the lens frame 90 and the correction lens 100 within the limit range as camera shake correction when photographing is possible.

(Engagement member 203)
Next, the engaging member 203 will be described. As shown in FIG. 14 to FIG. 16 and FIG. 22, the engaging member 203 is provided in the fixed cylinder 10 and has a cam shape in which a tip end portion is inclined toward the front. When the engaging member 203 is moved relative to the lens frame 90 in the direction of the optical axis when the lens barrel 1 is retracted, the driven portion 94 and the distal end portion of the engaging member 203 abut. Further, when the engagement member 203 is further moved after the contact, the pushed portion 94 of the lens frame 90 is secondly moved against the urging by the urging spring 201 of the first urging means 200. It is rotated around the shaft 112. By this rotation, the lens frame 90 and the correction lens 100 are retracted from the limit range to the outside of the optical axis. Since the correction lens 100 is retracted with a simple configuration using the engaging member 203, a special actuator for retracting is unnecessary. As a result, downsizing and cost reduction are possible.

  More details are as follows. When the correction lens 100 is retracted out of the optical axis from the limit range by the engagement member 203, the engagement member 203 is caused by a component force when pushing the driven portion 94 against the bias of the bias spring 201. The second shaft 112 is pressed against the end of the first restricting portion 711 (the right end of the first restricting portion 711 shown in FIG. 17). In this state, the second shaft 112 is restrained from moving. Further, in this state, the lens frame 90 is rotated about the second shaft 112. As a result, the regulated portion 91 is separated from the right end of the opened second regulating portion 712 and retracted outside the optical axis. In the present embodiment, the rotation trajectory of the lens frame 90 can be made constant without changing the position of the second shaft 112 with a simple configuration using the engaging member 203. Therefore, interference with other parts can be avoided.

(Second biasing means 202)
Next, the second urging means 202 will be described with reference to FIGS. 15 and 16.

  As an example shown in FIGS. 15 and 16, the second urging means 202 is stretched between the hook portion 82 (see FIG. 12) of the shutter unit 80 and the hook portion 95 (see FIG. 16) of the lens frame 90. It is a coil spring.

  As shown in FIG. 15, the second urging means 202 is such that the direction of the urging force that urges the lens frame 90 is substantially parallel to the optical axis A when the correction lens 100 is on the optical axis A. Are arranged as follows. That is, they are arranged so that the component force in the direction orthogonal to the optical axis A is as small as possible. Thereby, the influence of the urging of the second urging means 202 at the time of camera shake correction is small.

  On the other hand, by urging the lens frame 90 toward the optical axis A, it is possible to eliminate the play of the lens frame 90 in the optical axis direction. As a result, the position of the correction lens 100 in the optical axis direction can be accurately maintained, and good optical performance can be maintained.

(Second Embodiment)
Hereinafter, a second embodiment will be described. The second embodiment differs from the first embodiment in the configuration around the second group holding cylinder and the lens frame. In the second embodiment, this different part will be mainly described. Others are the same as those in the first embodiment.

  In the second embodiment, the lens frame 90 retracted out of the optical axis when the lens barrel 1 is retracted is moved relative to the second group holding cylinder 70 and the shutter unit 80 along the optical axis direction. A configuration around the second group holding cylinder and the lens frame according to the second embodiment will be described with reference to FIGS. FIG. 23 is a rear view of the second group holding cylinder in a photographing enabled state. FIG. 24 is a perspective view showing a lens frame and the like in a photographing enabled state. FIG. 25 is a perspective view showing a lens frame and the like when retracted. FIG. 26 is a side view of the lens frame when retracted. FIG. 27 is a side view of the lens frame in a photographing enabled state, and FIG. 28 is a cross-sectional view when retracted according to the second embodiment.

  As shown in FIGS. 23 to 25, in addition to the first shaft 111, the second shaft 112, the link member 113, and the first urging means 200 used as the camera shake correction mechanism 110 and the retraction mechanism, the second embodiment is used. Then, it has the spring member 400 and the moving means 410. In FIG. 25, the moving means 410 is indicated by a broken line. Further, the notch 81 is formed in the shutter unit 80, and at least the same position of the second group holding cylinder 70 is opened.

(Mounting of shutter unit 80 and lens frame 90)
As shown in FIG. 24, the spring member 400 urges the lens frame 90 in the direction away from the shutter unit 80 (the arrow rear side in the drawing). Along the second axis 112, the lens frame 90 and the cylindrical portion 207 of the bias control member 204 are movable in the optical axis direction. The second shaft 112 can rotate with respect to the first shaft 111 via the link member 113, but the position in the optical axis direction does not change. Further, the second shaft 112 moves the lens frame 90 to the front side of the illustrated arrow in the optical axis direction against the bias of the spring member 400 with respect to the second group holding cylinder 70 and the shutter unit 80.

  24, a gap is provided between the wall edge 117 of the recess 115 and the first contact piece 205 in a direction parallel to the optical axis. This gap is larger than the movement amount when the lens frame 90 is retreated from the optical axis and further moved in the optical axis direction. 25 and 26 show a position where the lens frame 90 is moved out of the optical axis with respect to the link member 113 and further moved in the optical axis direction. In addition, FIG. 27 shows the position of the lens frame 90 in a photographing enabled state. Further, in FIG. 27, the amount of movement of the lens frame 90 in the optical axis direction is indicated by “S”. That is, in this example, when the lens barrel 1 is retracted, the lens frame 90 is moved to the subject side (the arrow front side in the drawing) with respect to the shutter unit 80 and the second group holding cylinder 70.

(Position of magnet 301 and coil 303)
Next, the positions of the magnet 301 and the coil 303 in the photographing enabled state and the retracted state will be described.

  In this example, the magnet 301 provided on the lens frame 90 and the coil 303 and the hall element 302 provided on the outer surface of the shutter unit 80 face each other in the front-rear direction (a direction parallel to the optical axis) in the photographing enabled state. To do. At this time, the shutter unit 80 and the lens frame 90 are urged away from each other by the spring member 400, and the lens frame 90 contacts the rear end of the link member 113. Therefore, the distance between the shutter unit 80 and the lens frame 90 in the optical axis direction is kept constant. In this example, the member constituting the outer surface of the shutter unit 80 is an opposing member, but the coil 303 may be disposed in the second group holding cylinder 70. In this case, the second group holding cylinder 70 is the opposing member.

(Retraction of the lens frame 90 and movement in the optical axis direction when retracted)
The retraction of the lens frame 90 to the outside of the optical axis accompanying the transition from the photographing enabled state to the retracted state is the same as in the first embodiment.

  In the second embodiment, after the lens frame 90 is retracted outside the optical axis, the second group holding cylinder 70 is further moved in the direction of the image sensor. By this operation, a part of the lens frame 90 comes into contact with the contact portion 411 (the moving unit 410) formed on the fixed cylinder 10 on the image sensor fixing portion side. Thereafter, the second group holding cylinder 70 is further moved toward the image sensor. By this movement, the lens frame 90 is moved toward the subject against the urging of the spring member 400 with respect to the second group holding cylinder 70 and the shutter unit 80.

  At this time, a part of the lens barrel portion that holds the correction lens 100 of the lens frame 90 is caused to enter the notch portion 81 formed in the shutter unit 80. In addition, the plane portion that holds the magnet 301 of the lens frame 90 is brought close to the outer surface of the shutter unit 80. Further, the magnet 301, the coil 303, and the Hall element 302 are stopped at a position including the same plane orthogonal to the optical axis. FIG. 28 shows the state when the lens barrel is retracted.

  According to the configuration of the present embodiment, the lens barrel can be made thin when retracted by the amount that part of the lens barrel portion of the lens frame 90 is inserted into the cutout portion 81. In addition, not the notch part 81 but a recessed part may be sufficient. In other words, the shutter unit 80 may be configured so that the lens frame 90 can be inserted by an amount corresponding to the plate thickness of the shutter unit 80 when retracted.

  Thus, since the second shaft 112 is also used as a member for mounting the spring member 400, it is not necessary to provide a member for mounting the spring member. Therefore, the configuration is simplified and the cost can be reduced.

  The transition from the retracted state to the photographing enabled state in the lens barrel 1 is as follows. That is, the second group holding cylinder 70 and the shutter unit 80 move forward. The lens frame 90 is biased by the spring member 400 and moves away from the shutter unit 80. Further, when the second group holding cylinder 70 and the shutter unit 80 are integrally moved forward, the lens frame 90 rotates about the second shaft 112. Through a series of operations, the correction lens 100 enters the optical axis and becomes ready for photographing. At this time, the magnet 301 faces the coil 303.

  In the above-described two embodiments, the lens barrel is shown in which the shutter unit 80 is disposed on the front side (subject side) and the lens frame 90 is disposed on the rear side (image plane side). However, it is not limited to such a configuration. For example, contrary to the configuration, the shutter unit 80 may be disposed rearward (image plane side) and the lens frame 90 may be disposed forward (subject side). In the second embodiment, such a lens barrel may be configured such that the lens frame 90 and the shutter unit 80 are relatively close to each other when the lens barrel is retracted.

(Modification)
In the retracting mechanism of the embodiment, when the correction lens 100 is retracted out of the optical axis, the lens frame 90 is rotated about the second shaft 112. However, it is not limited to such a configuration. For example, the link member 113 and the lens frame 90 may be rotated together around the first shaft 111 and retracted. In this modification, the regulated portion and the first regulating portion can be omitted, and the position where the second regulating portion is provided and the shape thereof may be changed as appropriate.

  Note that “orthogonal” and “parallel” in the present application do not mean orthogonal or parallel in a strict sense, and may include errors that do not cause a problem when implementing the present invention. Good.

DESCRIPTION OF SYMBOLS 1 Lens barrel 10 Fixed cylinder 11 1st optical element 12 2nd optical element 13 Drive gear 14 Output gear 20 Straight advance cylinder A
30 Rotating cylinder A
40 Straight cylinder B
50 Front cylinder 60 Rotating cylinder B
70 Second group holding cylinder 71 Flange 711 First restriction portion 712 Second restriction portion 713 Upper groove wall 714 Lower groove wall 715 Left groove wall 72 Passage port 80 Shutter unit 81 Notch (shutter unit)
82 Hook part 90 Lens frame 91 Restricted part 92 Locking part 93 Abutting part 94 Pushed part 95 Hook part 100 Correction lens 110 Camera shake correction mechanism 111 First axis 112 Second axis 113 Link member 114 Convex part 115 Concave portion 200 First biasing means 201 Biasing spring (first biasing means)
202 Second urging means 203 Engaging member 204 Energizing control member 205 First abutted piece 206 Second abutted piece 300 Position detecting means 301 Magnet 302 Hall element 303 Coil 400 Spring member 410 Moving means 411 Abutting portion

Claims (17)

In a lens barrel having a camera shake correction mechanism that moves a correction lens in a plane orthogonal to the optical axis of the photographing optical system,
The camera shake correction mechanism is
A first axis fixed parallel to the optical axis;
A link member provided to be rotatable about the first axis;
A second axis provided on the link member and parallel to the optical axis;
A lens frame provided rotatably about the second axis and holding the correction lens;
A lens barrel characterized by comprising:   The lens barrel according to claim 1, wherein when the lens barrel is retracted, the amount of rotation of the lens frame is larger than that during camera shake correction, whereby the correction lens is retracted from the optical axis at the time of photographing. A first restricting portion for restricting a rotation amount of the link member;
The lens barrel according to claim 1, further comprising a second restricting portion that restricts a rotation amount of the lens frame. When the rotation of the link member is restricted at one end of the first restriction part, the second restriction part restricts the rotation of the lens frame,
When the lens barrel is retracted, the rotation of the link member is restricted at the other end of the first restricting portion, and the amount of rotation of the lens frame at the time of retracting is larger than that at the time of camera shake correction. 4. The lens barrel according to claim 3, wherein the lens barrel is retracted from the optical axis at the time of photographing. The lens frame is formed with a driven portion around a sleeve through which the second shaft passes,
5. The lens barrel according to claim 4, wherein when the retracted portion is engaged, an engaging member is engaged with the driven portion so that the amount of rotation of the lens frame at the time of retracting is larger than that at the time of camera shake correction. .   6. The lens barrel according to claim 5, further comprising first urging means for urging the lens frame in a direction for returning the lens frame in response to the rotation of the lens frame when retracted.   7. The first urging means does not urge the lens frame at the time of camera shake correction, and urges when the rotation amount of the lens frame becomes larger than at the time of camera shake correction. The lens barrel described.   The lens barrel according to claim 1, further comprising second urging means for urging the lens frame in the optical axis direction. A magnet disposed on any one of the lens frame or a facing member that faces the lens frame in a shooting state;
A coil disposed on the other of the lens frame or the opposing member;
A hall element disposed on the other of the lens frame or the opposing member;
The lens barrel according to claim 1, comprising: A magnet disposed on any one of the lens frame or a facing member that faces the lens frame in a shooting state;
A coil disposed on the other of the lens frame or the opposing member;
A hall element disposed on the other of the lens frame or the opposing member;
Have
4. The output of the hall element is calibrated by restricting the rotation of the link member at at least one end of the first restricting portion and bringing the lens frame into contact with the second restricting portion. The lens barrel described. Further comprising a shutter unit disposed on the optical axis and provided with a notch in a part of the outer edge thereof;
11. The lens barrel according to claim 1, wherein the first axis and the second axis are respectively disposed so as to penetrate the notch in a direction parallel to the optical axis. .   The lens barrel according to claim 11, wherein the correction lens is disposed immediately before or after the shutter unit. In a lens barrel having a camera shake correction mechanism that moves a correction lens in a plane orthogonal to the optical axis of the photographing optical system,
The camera shake correction mechanism has a lens frame that holds the correction lens and a facing member that faces the lens frame;
A magnet is disposed on one of the lens frame and the opposing member, and a position detection means for outputting a signal corresponding to the position of the coil and the magnet is disposed on the other.
When retracted, the lens frame is retracted from the optical axis while holding the magnet or the coil and the position detecting means, and is also moved in the optical axis direction with respect to the opposing member. Lens barrel.   The lens frame is positioned such that, after movement in the optical axis direction, the magnet and the coil or the position detecting means are located at a position including the same plane orthogonal to the optical axis. Item 14. The lens barrel according to Item 13. The lens frame is disposed on the image plane side with respect to the facing member,
The lens barrel according to claim 13 or 14, wherein when the lens barrel is retracted, the lens frame is moved toward the subject with respect to the facing member. A first axis disposed on the frame holding member and fixed in parallel with the optical axis;
A link member provided to be rotatable about the first axis;
A second axis parallel to the optical axis provided on the link member,
The lens barrel according to claim 13, wherein the lens frame is provided so as to be rotatable about the second axis.   The lens for correction is retracted from the optical axis at the time of photographing when the amount of rotation of the lens frame at the time of retracting is larger than that at the time of camera shake correction. The lens barrel described.

Images