JP2011150132A - Lens barrel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accurately determine the detachment position of an insertion/detachment optical element, in a lens barrel having the insertion/detachment optical element capable of moving to an insertion position on an optical axis and a detachment position detached in a radial direction. <P>SOLUTION: The lens barrel includes a detachment driving means that turns an inserting/detaching operation member 6 from the insertion position to the detachment position by backward movement in an optical axis direction of an advancing/retreating member when shifting from a photographing state to a housed state, and holds the inserting/detaching operation member 6 at the detachment position in the housed state. The lens barrel includes: a first detachment control member 40 that, as the detachment driving means, presses the inserting/detaching operation member 6 in the direction of the detachment position, by abutting on a part to be pressed 41 provided in a pivotally supporting part 6c when the inserting/detaching operation member 6 moves backward in the optical axis direction together with the advancing/retreating member; and a second detachment control member 42 that is located at a position, in which movement of a second arm part 6e in the inserting/detaching operation member 6 from the detachment position toward the direction of the insertion position is regulated, when the advancing/retreating member exists at a backward moving end in the housed state. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a lens barrel, and more particularly, to a lens barrel having an insertion / removal optical element that is movable between an insertion position on an optical axis and a separation position separated in a radial direction.

  The applicant has proposed Patent Literature 1 and Patent Literature 2 as lens barrels that can be thinned in the optical axis direction in the housed state. In the lens barrel of Patent Document 1, a plurality of optical elements constituting a zoom lens are positioned on the same shooting optical axis in a shooting state, and a part of the plurality of optical elements (hereinafter referred to as insertion / removal optical elements) in a storage state. Is called a decentered position from the photographic optical axis, and the detached insertion / removal optical element and at least a part of the optical element that does not leave are independently retracted. This lens barrel is provided with a detachment driving means for pressing and moving the holding frame from the insertion position on the photographing optical axis to the detachment position by using the force by which the holding frame of the insertion / removal optical element moves backward. .

  From the viewpoint of simplifying the structure and reducing manufacturing costs, the above-described insertion / removal optical element is held by a swinging (rotating) member centered on a rotating shaft substantially parallel to the optical axis, and the swinging operation thereof It is preferable to move to an insertion position and a removal position by. In this case, the detachment driving means is configured to press the position in the vicinity of the rotation axis against the holding frame of the insertion / removal optical element that moves rearward in the optical axis direction, thereby moving the unit movement amount in the optical axis direction. It becomes easy to increase the amount of the detachment rotation. That is, since the insertion / removal optical element can be quickly moved to the separation position, the degree of freedom in designing the peripheral structure is increased. On the other hand, if the separation rotation amount per unit movement amount in the optical axis direction is large, precise positioning in the rotation direction becomes difficult. As a countermeasure, in the lens barrel of Patent Document 2, the first detachment driving unit and the second detachment unit differ in the amount of detachment drive applied to the holding frame of the insertion / removal optical element per unit movement amount in the optical axis direction. When the driving means is provided and the photographing state is changed to the retracted state, the separation movement by the first separation driving means having a large separation driving amount per unit movement amount is performed first, and then the separation driving amount per unit movement amount is The holding frame of the separation optical element is moved to the separation position by the small second separation driving means. Thereby, the removal movement of the insertion / removal optical element with high accuracy is achieved.

Japanese Patent No. 3771909 JP 2007-206238 A

  In pursuit of compactness in the lens barrel storage state, the density of parts around the insertion / removal optical element is further increased, and in order to avoid interference with other members, insertion with higher accuracy than before is possible. It was required to determine the separation position of the de-optical element. Therefore, an object of the present invention is to provide a lens barrel capable of detaching and positioning an insertion / removal optical element with higher accuracy than before.

  The present invention relates to an advancing / retracting member that is movable in the optical axis direction of the photographic optical system and moves rearward in the optical axis direction when the photographing state is changed to the retracted state; An insertion / removal supported pivotably at an insertion position for positioning the insertion / removal optical element on the optical axis and a removal position in a direction away from the optical axis about a rotation axis substantially parallel to the optical axis. An operating member; an insertion holding means for holding the insertion / removal operation member at the insertion position in the photographing state; and an insertion / removal member from the insertion position by moving the advancing / retreating member backward in the optical axis direction when the photographing state is changed to the storage state. A lens barrel including: a detachment driving unit configured to rotate to a detachment position and hold the insertion / removal operation member at the detachment position in a stored state, wherein the insertion / removal operation member holds an insertion / removal optical element; And a first arm protruding in a different outer diameter direction from the holding portion And a second arm part and a shaft support part provided at the tip of the first arm part and supported by the rotation shaft. The detachment driving means is arranged rearward in the optical axis direction together with the insertion / removal operation member. A first detachment control member that abuts against a pressed portion provided on the shaft support when moving and presses the insertion / removal operation member in the direction of the detachment position; and when the advancing / retreating member is at the rearward movement end in the retracted state And a second detachment control member positioned at a position for restricting movement of the second arm portion of the insertion / removal operation member from the detachment position to the insertion position direction.

  More preferably, at least one of the second detachment control member and the second arm portion of the insertion / removal operation member is provided with a separation assist surface that is inclined with respect to the optical axis, and the insertion / removal operation member is moved rearward in the optical axis direction. It is preferable that the insertion / removal operation member is pressed toward the separation position when the second arm portion and the second separation control member come into contact with each other through the separation assisting surface by the movement. In this case, when the shooting state is changed to the retracted state, the pressing operation by the second detachment control member is performed at a later timing than the pressing operation by the first detachment control member in the detachment position direction with respect to the insertion / removal operation member. To be configured.

  An urging member that urges the insertion / removal operation member in the direction of the insertion position and a second arm portion of the insertion / removal operation member, and is brought into contact with a part of the advancing / retreating member by the urging force of the urging member. The insertion holding means is preferably constituted by an insertion positioning surface that determines the insertion position of the member. As a result, the second arm portion of the insertion / removal operation member has both the function of receiving position control by the second separation control member and the function of the insertion holding means, and it is simple and without increasing the number of parts. An inexpensive configuration can be achieved.

  In addition, the first detachment control member and the second detachment control member are respectively formed integrally with a common rear member that is located behind the advance / retreat member in the photographing state and the retracted state, and protrudes forward in the optical axis direction. It is preferable to comprise by these.

  According to the lens barrel of the present invention having the above features, with respect to the second arm portion located in the rotational radial direction away from the shaft support portion in the insertion / removal operation member holding the insertion / removal optical element, Since the second detachment control member that restricts the movement from the detachment position to the insertion position direction is provided, the detachable optical element can be removed with higher accuracy than the mode in which the position of the detachable operation member is controlled only near the shaft support portion. Positioning became possible.

It is sectional drawing in the imaging state (zoom area) which shows one Embodiment of the zoom lens-barrel to which this invention is applied. It is sectional drawing in the accommodation (collapse) state of the zoom lens barrel. It is a disassembled perspective view of the main components of the zoom lens barrel. It is the disassembled perspective view seen from the optical axis direction back which shows the support structure of the 2nd lens group with respect to 2 group lens movement frame. It is the figure which expanded a part of 2 group lens movement frame of FIG. FIG. 6 is a rear perspective view showing the relationship between the second group lens moving frame and the second group lens holding frame in a shooting state. FIG. 6 is a rear perspective view showing a relationship between a second group lens moving frame and a second group lens holding frame in a lens barrel storage state. It is a perspective view showing an insertion / removal control mechanism and an axial position control mechanism when the second group lens holding frame is at the insertion position. It is a perspective view showing an insertion / removal control mechanism and an axial position control mechanism immediately before the second group lens holding frame is rotated from the insertion position toward the removal position. A perspective view showing an insertion / removal control mechanism and an axial position control mechanism in a state where the second group lens holding frame is rotated toward the disengagement position and is moved from the forward position to the backward position within the second group lens moving frame. It is. FIG. 5 is a perspective view showing an insertion / removal control mechanism and an axial position control mechanism in a state where the second group lens holding frame is rotated toward the disengagement position and reaches the retracted position in the second group lens moving frame. FIG. 6 is a perspective view showing an insertion / removal control mechanism and an axial position control mechanism in a state in which the rotation of the second group lens holding frame to the separation position is completed. It is a perspective view which shows the insertion / removal control mechanism and axial position control mechanism of a 2 group lens holding frame in the accommodation state of a zoom lens barrel. It is a front view of the insertion / removal control mechanism when the second group lens holding frame is at the insertion position. It is a front view of the insertion / removal control mechanism of the aspect which hold | maintained the 2nd group lens holding frame in the removal position with the separation control protrusion. It is a front view of the insertion / removal control mechanism of the aspect which hold | maintained the 2nd group lens holding frame in the removal position with the separation assistance protrusion. It is the figure which showed typically the positional relationship of the optical axis direction of the separation control protrusion and the separation auxiliary protrusion with respect to the second group lens holding frame.

  1 and 2 show an embodiment of a retractable zoom lens barrel ZL to which the present invention is applied. The photographing optical system of the zoom lens barrel ZL includes, in order from the object (subject) side, a first lens group LG1, a shutter S, an aperture variable aperture A, a second lens group (insertion / removal optical element) LG2, and a third lens group LG3. The low-pass filter 25 and the image sensor 26 are provided. In the following description, the optical axis direction means a direction parallel to the optical axis O of the photographing optical system, the front means front in the optical axis direction (subject side), and the rear means rear in the optical axis direction (image). Surface side).

  The zoom lens barrel ZL has a cylindrical housing 22 as a fixing member, and an image sensor holder (rear member) 21 is fixed to the rear portion of the housing 22. The low-pass filter 25 and the image sensor 26 are unitized and fixed to the front surface of the image sensor holder 21.

  The third lens group LG3 is a focus lens group in the zoom lens barrel ZL. As shown in FIG. 3, the third group lens frame 51 includes a lens holding cylinder 51a that holds the third lens group LG3, and a pair of guide arm parts 51b that extend from the lens holding cylinder 51a in the outer diameter direction. , 51c. At the boundary between the lens holding cylinder 51a and the guide arm 51c, a second group lens housing recess 51d into which a lens holding cylinder 6a of a second group lens holding frame 6 described later can enter is formed. A guide shaft 52 fixed to the housing 22 and the image sensor holder 21 is inserted into a guide hole formed in one guide arm portion 51b, and the third group lens frame 51 is inserted in the optical axis direction via the guide shaft 52. It is supported so that it can move straight. An anti-rotation portion provided at the tip of the other guide arm portion 51 c engages with a rotation restricting portion (not shown) formed in the housing 22 to restrict the rotation of the third group lens frame 51. The third group lens frame 51 is urged forward in the optical axis direction by a third group urging spring 55 formed of a torsion spring supported on the outer surface of the housing 22, and is brought into contact with the AF nut 54 to restrict forward movement. . The AF nut 54 is screwed into the lead screw 58 and is moved in the optical axis direction by rotating the lead screw 58 by the AF motor 160. Therefore, the third group lens frame 51 is moved in the optical axis direction by driving the AF motor 160.

  A zooming group (cam ring) block that is driven and controlled by the zoom motor 150 is supported inside the housing 22, in addition to the support driving means for the third group lens frame 51. As shown in FIG. 3, the variable power group (cam ring) block includes a straight guide ring 10, a cam ring 11, a feeding cylinder 12, and a second group lens block 80.

  The cam ring 11 constitutes an external appearance cylinder of the zoom lens barrel ZL together with the feeding cylinder 12 and has a guide projection 11 a that is slidably fitted into a cam ring guide groove 22 a formed on the inner peripheral surface of the housing 22. . The cam ring 11 is rotated by receiving the driving force of the zoom gear 28 rotated by the zoom motor 150 (FIG. 3) by the gear portion 11b, and moves in the optical axis direction while rotating by the guide of the cam ring guide groove 22a.

  The rectilinear guide ring 10 is guided so as to be linearly movable in the optical axis direction by engaging the rectilinear guide protrusion 10a slidably with a rectilinear guide groove 22b formed on the inner surface of the housing 22. By sandwiching the rotation guide claw 11c between the wall portion constituting the base portion of the rectilinear guide projection 10a and the rotation guide claw 10b, the rectilinear guide ring 10 and the cam ring 11 are capable of relative rotation and move together in the optical axis direction. Are so coupled.

  The second group lens block 80 has a configuration in which the shutter block 100 is fixed to the front part of the second group lens moving frame (advance / retreat member) 8, and a straight guide key 8a protruding from the second group lens moving frame 8 in the outer diameter direction is provided. The linear guide ring 10 is slidably engaged with a straight guide slot 10c, which is a long hole in the optical axis direction formed in the straight guide ring 10, so that the linear guide is guided in the optical axis direction. The shutter S is composed of a plurality of shutter blades supported by an axis parallel to the optical axis O, and the shutter S is opened and closed by driving the plurality of shutter blades by an actuator built in the shutter block 100. At the rear of the shutter block 100, an aperture variable stop A whose aperture diameter changes according to the state of the zoom lens barrel ZL is provided. The aperture variable aperture stop A is composed of a plurality of aperture blades supported by an axis parallel to the optical axis O, and is wider than the tele end side (lower half cross section in FIG. 1) of the zoom range (in FIG. 1). The opening degree is switched so as to reduce the aperture diameter in the upper half section), and in both states, the aperture diameter allows a part of the second lens group LG2 to enter the aperture stop. A second group lens holding frame (insertion / removal operation member) 6 that holds the second lens group LG2 is supported inside the second group lens moving frame 8. The second group lens holding frame 6 is supported so as to be swingable about a rotation shaft 33 whose axis is directed in the optical axis direction. A detailed support structure of the second group lens holding frame 6 will be described later.

  The second group cam follower CF2 provided in the second group lens moving frame 8 is slidably engaged with the second group control cam groove CG2 formed on the inner peripheral surface of the cam ring 11. The second group cam follower CF2 is provided on the outer diameter portion of the rectilinear guide key 8a, and protrudes to an engagement position with the second group cam follower CF2 through a rectilinear guide slot 10c that penetrates the rectilinear guide ring 10 in the radial direction. Since the second group lens moving frame 8 (second group lens block 80) is guided linearly in the direction of the optical axis through the straight guide ring 10, when the cam ring 11 rotates, the second group lens moving frame 8 (2 group lens block 80) has 2 according to the shape of the second group control cam groove CG2. The group lens moving frame 8 (second group lens block 80) moves in a predetermined locus in the optical axis direction.

  A first lens group LG1 is held in the feeding cylinder 12. The feeding cylinder 12 is guided in a straight line in the optical axis direction by slidably engaging a straight guide key 12 a (FIG. 1) provided on the inner surface side with a straight guide groove 10 d of the straight guide ring 10. In FIG. 1, the linear guide groove 10d and the linear guide key 12a, which are the linear guide mechanism of the feeding cylinder 12, and the linear guide slot 10c and the linear guide key 8a, which are the linear guide mechanisms of the second group lens block 80, are located at the same sectional position in FIG. As can be seen from FIG. 3, the actual circumferential position of each linear guide mechanism is different.

  A first group cam follower CF1 provided near the rear end of the feeding cylinder 12 is slidably engaged with a first group control cam groove CG1 formed on the inner peripheral surface of the cam ring 11. Since the feeding cylinder 12 is linearly guided in the optical axis direction via the linear guide ring 10, when the cam ring 11 rotates, the feeding cylinder 12 follows a predetermined locus in the optical axis direction according to the shape of the first group control cam groove CG1. Moving.

  A support structure of the second lens group LG2 will be described. As shown in FIG. 4, the second group lens moving frame 8 includes a cylindrical portion 8b having a rectilinear guide key 8a on the outer surface, and an upright wall-shaped inner flange portion 8c provided inside the cylindrical portion 8b. The shaft fixing member 36 is fixed to the inner flange portion 8c with screws 37 from the rear, and the front end portion of the rotating shaft 33 is inserted and supported in the shaft fixing hole 8d formed in the inner flange portion 8c. A rear end portion of the rotation shaft 33 is inserted and supported in a shaft fixing hole 36 a formed in the shaft fixing member 36. In the support state by the shaft fixing holes 8d and 36a, the axis of the rotating shaft 33 is substantially parallel to the optical axis.

  The second group lens holding frame 6 has a cylindrical lens holding cylinder part (holding part for the insertion / removal optical element) 6a that holds the second lens group LG2, and a second lens group extending from the lens holding cylinder part 6a in the outer diameter direction. One arm portion 6b, a shaft support portion 6c provided at the tip of the first arm portion 6b, a shaft hole 6d in the optical axis direction formed in the shaft support portion 6c, and the first arm portion 6b from the lens holding cylinder portion 6a. And a second arm portion 6e extending in an outer diameter direction substantially opposite to the above. On the side surface of the second arm portion 6e, an insertion positioning surface (insertion holding means) 6f and a detachment positioning surface 6g are formed successively from the distal end side (see FIGS. 14 to 16). Further, a separation assisting surface 6h is formed at the boundary between the rear surface of the second arm portion 6e and the separation positioning surface 6g. The insertion positioning surface 6f and the separation positioning surface 6g are parallel to the optical axis O, respectively, and the separation assisting surface 6h is a tapered surface that inclines in a direction away from the separation positioning surface 6g as it advances rearward in the optical axis direction.

  A rotation shaft 33 is inserted into the shaft hole 6d, and the second group lens holding frame 6 positions the second lens group LG2 on the optical axis with the rotation shaft 33 as the center (of the second lens group LG2). An insertion position (FIGS. 1, 6, and 14) whose center is aligned with the optical axis O and a separation position (FIGS. 2, 7, 15, and 16) from which the second lens group LG2 is detached from the optical axis O. ). As shown in FIGS. 14 to 16, the coil portion surrounding the shaft support portion 6 c, the concave portion 6 i formed in the first arm portion 6 b, and the spring receiving portion 8 e formed on the inner surface of the cylindrical portion 8 b of the second group lens moving frame 8. The second group lens holding frame 6 is inserted by the insertion urging spring 39 (insertion holding means, urging member) 39 which is a torsion spring composed of a pair of spring legs engaged with the second group lens. It is biased to the position side. The second group lens holding frame 6 is configured such that the insertion positioning surface 6f of the second arm portion 6e is brought into contact with a positioning projection (insertion holding means) 8f formed to protrude from the inner flange portion 8c of the second group lens moving frame 8. The rotation of the insertion biasing spring 39 in the biasing direction is restricted and held at the insertion position (FIGS. 6 and 14). If the side on which the zoom motor 150 is supported in FIG. 3 is located above the zoom lens barrel ZL, the second lens group LG2 is caused by the swing of the second group lens holding frame 6 about the rotation shaft 33. Changes the position of the zoom lens barrel ZL in the horizontal direction. On the other hand, in FIGS. 1, 2, 4, 6, 7, 14, and 15, the second group lens moving frame 8 is shown in a phase rotated about 90 degrees with respect to FIG. As the second group lens holding frame 6 swings around the rotation shaft 33, the position of the second lens group LG2 is changed in the vertical direction in the figure.

  An axial through hole 8g penetrating in the optical axis direction is formed in the inner flange portion 8c of the second group lens moving frame 8. The axial through-hole 8g is formed in correspondence with the position of the lens holding cylinder portion 6a when the second group lens holding frame 6 is in the insertion position, and further the lens from the insertion position to the middle of the removal position. The shape follows the movement locus of the holding cylinder portion 6a. Further, the cylindrical portion 8b of the second group lens moving frame 8 and the linear guide ring 10 on the outer side thereof penetrate in the radial direction in which the lens holding barrel portion 6a can enter when the second group lens holding frame 6 is in the detached position. Holes 8h and 10e are formed.

  A separation control projection (first separation control member) 40 is provided on the image sensor holder 21 so as to project forward in the optical axis direction. The detachment control protrusion 40 has a partial cylindrical shape centered on the axis of the rotation shaft 33, and has a detachment guide surface 40a facing the tip side and a detachment holding surface 40b which is one side portion in the circumferential direction. The separation guide surface 40a is a lead surface (spiral lead surface) having a predetermined crossing angle with respect to a plane parallel to the optical axis O, and the separation holding surface 40b is a surface substantially parallel to the optical axis O. On the shaft support portion 6 c of the second group lens holding frame 6, a pressed projection (pressed portion) 41 is provided so as to be positioned on the extension of the separation control projection 40 in the optical axis direction. The pressed projection 41 has a partial cylindrical shape along the outer peripheral surface of the shaft support portion 6c, and the separation guide surface 41a, which is a lead surface substantially parallel to the separation guide surface 40a of the separation control projection 40, faces rearward in the optical axis direction. A detachment holding surface 41b that is substantially parallel to the detachment holding surface 40b (that is, substantially parallel to the optical axis O) is formed on one side in the circumferential direction. The detachment guide surface 40a and the detachment guide surface 41a resist the urging force of the insertion urging spring 39 when a moving force in the rearward direction in the optical axis direction is applied to the second group lens holding frame 6 in a state of abutting each other. The second group lens holding frame 6 is a surface that generates a component force for rotating the second group lens holding frame 6 from the insertion position to the removal position. The detachment holding surface 40b and the detachment holding surface 41b are surfaces that hold the second group lens holding frame 6 at the detachment position against the urging force of the insertion urging spring 39 by mutual contact. A shaft stopper member 36 is positioned behind the pressed protrusion 41 in the second group lens holding frame 6. However, the shaft stopper member 36 has a protrusion insertion / removal hole 36 b that allows the separation control protrusion 40 to pass therethrough. Thus, the contact between the separation control projection 40 and the pressed projection 41 is not hindered by the shaft stopper member 36.

  Further, the image sensor holder 21 is provided with a separation assist projection (second separation control member) 42 that projects forward in the optical axis direction at a position different from the separation control projection 40 (see FIG. 3). As shown in FIGS. 15 and 16, the separation assisting protrusion 42 is inserted at a position facing the separation positioning surface 6g of the second arm portion 6e when the second group lens holding frame 6 is at the separation position, that is, from the separation position. It is provided at a position that restricts the movement of the second arm portion 6e in the position direction, and has a separation assisting surface 42a facing the distal end side thereof and a separation positioning surface 42b substantially parallel to the optical axis O. The separation assisting surface 42a is a tapered surface that is gradually inclined away from the separation positioning surface 42b as it advances forward in the optical axis direction. The separation assist protrusion 42 has a smaller amount of protrusion from the image sensor holder 21 than the separation control protrusion 40, and the separation assist surface 42 a is located behind the separation guide surface 40 a of the separation control protrusion 40 in the optical axis direction (see FIG. 17).

  In the extension of the rotation shaft 33, the distance between the inner flange portion 8c and the shaft stopper member 36 is set to a size that allows a predetermined amount of movement in the optical axis direction of the shaft support portion 6c. That is, the second group lens holding frame 6 is supported so as to be movable in the optical axis direction with respect to the second group lens moving frame 8. A forward biasing spring 38 that biases the second group lens holding frame 6 toward the front in the optical axis direction is inserted between the shaft supporting portion 6c and the shaft stopper member 36, and the biasing force of the shaft supporting portion 6c is inserted. The front end is kept in contact with the inward flange 8c. As shown in FIG. 5, a pair of concave portions 43 and a pair of concave portions 43 project rearward in the optical axis direction from the pair of concave portions 43 on the second group lens moving frame 8 side of the contact portions. A pair of rear protrusions 44 are alternately formed. 8 to 13, only one of the pair of rear protrusions 44 is shown in order to facilitate understanding of the relationship with the front protrusion 46 on the second group lens holding frame 6 side. Each of the rear protrusions 44 has a fan shape centered on the shaft fixing hole 8d when viewed from the rear in the optical axis direction, and a receding guide surface 44a is formed at a circumferential end (a surface facing the recess 43). On the other hand, on the second group lens holding frame 6 side of the abutting portion, as shown in FIGS. 8 to 15, a pair of forward protrusions is arranged at the front end of the shaft support portion 6c in the radial arrangement with the shaft hole 6d interposed therebetween. A portion 46 is provided. Each of the front protrusions 46 has a fan shape centered on the shaft hole 6c when viewed from the front in the optical axis direction, and a retraction guide surface 46a substantially parallel to the retraction guide surface 44a is formed at the circumferential end thereof. . The retreat guide surfaces 44a and 46a are lead surfaces having a predetermined crossing angle with respect to a plane parallel to the optical axis O. Further, the bottom surface portion (front surface in the optical axis direction) of the concave portion 43, the rear end surface 44b of the rear protrusion portion 44, and the front end surface 46b of the front protrusion portion 46 are planes orthogonal to the optical axis O, respectively.

  When the second group lens holding frame 6 is in the insertion position (FIGS. 6 and 14) in the rotation direction around the rotation shaft 33, the pair of front protrusions 46 face the pair of recesses 43 (FIG. 8). The second group lens holding frame 6 with respect to the second group lens moving frame 8 is moved forward in the optical axis direction (shutter S and opening) by which the forward projecting portion 46 enters the concave portion 43 by the biasing force of the forward biasing spring 38. (Approaching position with respect to the variable aperture A). At this forward position, the front end surface 46 b of the front protrusion 46 comes into contact with the bottom surface of the recess 43, so that the position of the second group lens holding frame 6 in the optical axis direction is determined. The retreat guide surfaces 44a and 46a are opposed to the urging force of the advancing urging spring 38 when turning force from the insertion position to the detachment position is applied to the second group lens holding frame 6 in a state of abutting each other. It is a surface that generates a component force that pushes the group lens holding frame 6 backward in the optical axis direction (FIGS. 10 and 11). When the second group lens holding frame 6 is rotated to the disengagement position (FIGS. 7, 15, and 16), the front end surfaces 46 b of the pair of front projecting portions 46 are rear end surfaces 44 b of the pair of rear projecting portions 44. Is held at a retracted position in the optical axis direction (a spaced position with respect to the shutter S and the variable aperture stop A) (FIG. 13).

  The zoom lens barrel ZL having the above structure operates as follows. In the photographing state (zoom range) shown in FIG. 1, the cam ring 11 is extended forward in the optical axis direction with respect to the housing 22, and the extension amount of the cam ring 11 is controlled by the locus of the cam ring guide groove 22a. The follower cylinder 12 that supports the first lens group LG1 and the second group lens block 80 (second group lens moving frame 8) that supports the second lens group LG2 have cam followers CF1 and CF2 respectively corresponding to the rotation of the cam ring 11. The guides of the cam grooves CG1 and CG2 are guided to move in the direction of the optical axis. At the wide end in the upper half of FIG. 1, the distance between the first lens group LG1 and the second lens group LG2 is large, and at the tele end in the lower half of FIG. The interval between the first lens group LG1 and the second lens group LG2 is reduced. In the entire zoom range from the wide end to the tele end, the second group lens holding frame 6 does not retract to a position where it comes into contact with the separation control projection 40 or the separation assist projection 42, and the biasing force of the insertion biasing spring 39 Thus, the insertion positioning surface 6f is brought into contact with the positioning projection 8f and held at the insertion position (FIGS. 6 and 14) in which the center of the second lens group LG2 coincides with the optical axis O. When the second group lens holding frame 6 is in the insertion position, as shown in FIG. 8, the pair of front projecting portions 46 are in a rotational direction phase facing the pair of concave portions 43, and are within the second group lens moving frame 8. The position of the second group lens holding frame 6 in the optical axis direction is the forward position where the front end surfaces 46b of the pair of front protrusions 46 are brought into contact with the bottom surfaces of the pair of recesses 43 by the biasing force of the forward biasing spring 38. Become. As shown in FIG. 1, at the forward position of the second group lens holding frame 6, a part near the front end of the lens holding cylinder portion 6a enters the axial through hole 8f of the second group lens moving frame 8, and further the lens. A part of the second lens group LG2 slightly protruding forward from the holding cylinder 6a enters the inside of the opening formed by the variable aperture stop A. The distance between the front end of the second lens group LG2 and the shutter S in the optical axis direction at the forward position of the second group lens holding frame 6 is indicated by “D1” in FIG.

  When the zoom motor 150 is driven in the lens barrel storage direction from the photographing state shown in FIG. 1 (more specifically, the wide end in the upper half of FIG. 1), the guide protrusion 11a receives the guide of the cam ring guide groove 22a, and the cam ring 11 Is moved backward in the optical axis direction while rotating. The feeding cylinder 12 and the second group lens block 80 (second group lens moving frame 8) move rearward in the optical axis direction together with the cam ring 11 with predetermined relative movement along the locus of the cam grooves CG1 and CG2 on the cam ring 11. To do. At the beginning of the backward movement, the second group lens moving frame 8 and the second group lens holding frame 6 do not change the relative positions in the optical axis direction of each other (that is, the second group lens holding frame 6 is moved to the second group lens moving frame). 8) (moving integrally) while being held at the forward position in FIG. Eventually, when the second group lens holding frame 6 together with the second group lens moving frame 8 moves rearward in the optical axis direction and approaches the image sensor holder 21, as shown in FIGS. 9 and 10, the release guide surface of the pressed protrusion 41. 41a approaches and comes into contact with the separation guide surface 40a of the separation control protrusion 40, and the second group lens holding frame 6 is moved away from the rear group moving frame 8 by the inclined shape of the separation guide surfaces 40a and 41a. A component force is generated to rotate toward. When the second group lens holding frame 6 starts to rotate toward the detachment position, the backward guide surface 46a of the front protrusion 46 provided on the second group lens holding frame 6 side is rearward provided on the second group lens moving frame 8 side. The second group lens holding frame 6 is brought into contact with the backward guide surface 44a of the protrusion 44 (FIG. 10), and the second group lens holding frame 6 is moved from the rotational force of the second group lens holding frame 6 by the inclined shape of the backward guide surfaces 44a and 46a. A component force is generated to move relative to the rear in the optical axis direction. 8 to 10, the second arm portion 6e of the second group lens holding frame 6 is located in front of the separation assist projection 42 in the optical axis direction, and is also detached in a plane perpendicular to the optical axis. Since it is at a position separated from the auxiliary protrusion 42, it does not come into contact with the separation auxiliary protrusion 42.

  As described above, when the zoom lens barrel ZL is in the photographing state of FIG. 1, a part of the lens holding cylinder portion 6a of the second group lens holding frame 6 enters the axial through hole 8f of the inner flange portion 8c. A part of the second lens group LG2 enters the aperture of the aperture variable stop A. In the storing operation of the zoom lens barrel ZL, the second group lens holding frame 6 is relatively moved rearward within the second group lens moving frame 8 to release the state of entering the through hole 8f or the aperture opening. For this reason, it is possible to perform the rotation to the separation position without interfering with the variable aperture stop A and the inner flange portion 8c. As shown in FIG. 11, the movement of the second group lens holding frame 6 to the retracted position by the guidance of the backward guide surfaces 44a and 46a is performed while the contact of the release guide surfaces 40a and 41a continues, that is, the second group lens. This is completed before the holding frame 6 reaches the disengagement position. Thereafter, the state in which the front end face 46b of the front protrusion 46 and the rear end face 44b of the rear protrusion 44 are in contact with each other by the biasing force of the forward biasing spring 38 is maintained, and the second group lens holding frame 6 is in the second group lens moving frame. 8 is held in the retracted position. The distance between the front end of the second lens group LG2 and the shutter S in the optical axis direction at the retracted position is indicated by “D2” in FIG. As can be seen from the comparison with FIG. 1, the distance between the second lens group LG2 and the shutter S is larger (D1 <D2) than in the shooting state.

  Subsequently, as shown in FIG. 12, the rotation of the second group lens holding frame 6 in the direction of the separation position by the guidance of the separation guide surfaces 40a and 41a is completed, and the second group lens is brought into contact with the separation holding surfaces 40b and 41b. The holding frame 6 is held at a fixed position in the rotation direction. Immediately after completion of the rotation to the second group lens holding frame 6 by the guidance of the separation guide surfaces 40a and 41a, the second arm portion 6e is located in front of the separation assist projection 42 as shown in FIG. The lens holding frame 6 has not been subjected to position control by the separation assist projection 42. In other words, before the second group lens holding frame 6 reaches the position where the second group lens holding frame 6 can come into contact with the separation assisting projection 42, the movement of the second group lens holding frame 6 toward the separation position by the separation control projection 40 is completed. As described above, the protruding amount of the separation control projection 40 and the separation assist projection 42 from the image sensor holder 21 and the formation positions of the pressed projection 41 and the second arm portion 6e in the second group lens holding frame 6 are set.

  After the state of FIG. 12, the second group lens holding frame 6 is moved backward within the second group lens moving frame 8 until the second group lens block 80 (second group lens moving frame 8) reaches the rearward movement end shown in FIG. 2. The second group lens block 80 moves backward while being held. FIG. 13 shows the positional relationship between the second group lens holding frame 6, the separation control projection 40, and the separation assist projection 42 when the second group lens block 80 (second group lens moving frame 8) has reached the rearward movement end. Yes. As can be seen from the figure, when the second group lens block 80 (second group lens moving frame 8) reaches the rearward movement end, the separation positioning surface 6g of the second arm portion 6e of the second group lens holding frame 6 is detached. The positional relationship is opposite to the separation positioning surface 42b. Thereby, in addition to the separation holding surfaces 40b and 41b of the separation control projection 40 and the pressed projection 41, the separation grouping surface 42b of the separation auxiliary projection 42 and the separation positioning surface 6g of the second arm portion 6e also hold the second group lens. It is possible to restrict the rotation of the frame 6 to the insertion position. In addition, in FIG. 7 which shows the state which has the 2 group lens moving frame 8 in a back movement end similarly to FIG. 13, illustration of the separation assistance protrusion 42 is abbreviate | omitted.

  FIG. 15 shows a state where the second group lens holding frame 6 can be rotated to the designed release position by the contact between the release control projection 40 and the release holding surfaces 40b and 41b of the pressed projection 41. . At this time, the separation assisting protrusion 42 and the second arm portion 6e have the separation positioning surfaces 42b and 6g close to each other, but are slightly separated from each other. Unlike this, the second group lens holding frame 6 does not reach the designed separation position due to an error in accuracy in the state where the separation rotation by the guidance of the separation control projection 40 and the pressed projection 41 is completed. In this case, the second group lens holding frame 6 can be reliably moved to the designed separation position by the contact between the separation assist protrusion 42 and the second arm portion 6e. Specifically, the second lens group holding frame 6 is stopped at an angular position (advancing in the clockwise direction) slightly closer to the insertion position than the position shown in FIG. 15 with the detachment holding surfaces 40b and 41b in contact with each other. In this case, when the second group lens holding frame 6 moves backward from the position of FIG. 12, the separation assisting surface 42a of the separation assisting protrusion 42 comes into contact with the separation assisting surface 6h of the second arm portion 6e. The separation assist surfaces 42a and 6h are tapered surfaces that generate a component force that presses the second group lens holding frame 6 in the direction of the separation position by the backward movement of the second group lens holding frame 6. The separation assist surfaces 42a and 6h The second group lens holding frame 6 is guided and pressed toward the separation position. When the second group lens holding frame 6 reaches the rearward movement end in FIG. 13, the separation positioning surface 42b of the separation assisting protrusion 42 and the separation positioning surface 6g of the second arm portion 6e come into contact with each other as shown in FIG. The group lens holding frame 6 is held at the designed separation position. In other words, the separation assist protrusion 42 and the second arm portion 6e function as means for ensuring that the second group lens holding frame 6 is positioned at the designed separation position.

  Further, as shown in FIG. 16, the separation position of the second group lens holding frame 6 is always determined by the contact between the separation assist projection 42 and the second arm portion 6e, that is, the separation assist projection 42 and the second arm portion in the separation operation. It is also possible to make a design based on the assumption that 6e abuts. In this aspect, the separation assisting surface of the separation assisting projection 42 is caused by the backward movement of the second group lens holding frame 6 following the rotation of the second group lens retaining frame 6 by the pressing of the separation guide surface 40 a of the separation control projection 40. The formation positions of the separation control projection 40 and the separation assist projection 42 are set in advance so that 42a abuts against the separation assist surface 6h of the second arm portion 6e and presses the second group lens holding frame 6 in the one-step separation position direction. Is done. When the second group lens moving frame 8 reaches the rearward moving end (FIGS. 2, 7, and 13) in the optical axis direction, the detachment positioning surface 42b of the detachment assisting protrusion 42 and the detachment positioning of the second arm portion 6e are performed. The surface 6g abuts to hold the second group lens holding frame 6 in the detached position (FIG. 16).

  FIG. 17 is a diagram schematically showing the positional relationship between the separation control projection 40 and the separation assist projection 42 in the optical axis direction with respect to the second group lens holding frame 6. Since the second group lens holding frame 6 is a member that rotates (swings) with relative movement in the optical axis direction with respect to the second group lens moving frame 8, the separation guide surfaces 40a and 41a are spiral. Although it is a lead surface, in FIG. 17, the separation guide surfaces 40 a and 41 a are represented as planar surfaces that do not include a spiral component. Accordingly, in FIG. 17, the movement between the insertion position and the removal position of the second group lens holding frame 6 is simulated as a straight movement in the vertical direction in the figure. In addition, the positions of the second arm portion 6e and the pressed projection 41 in the optical axis direction on the second group lens holding frame 6 are actually different, but in FIG. 17, the rear surface of the pressed projection 41 (of the separation guide surface 41a). The rear end) and the rear end of the second arm portion 6e (the rear end of the separation assisting surface 6h) are aligned. As can be seen from FIG. 17, following the separation rotation imparting range RA by the separation guide surface 40 a in the separation control protrusion 40, a separation holding range RB by the separation holding surface 40 b is set behind the separation rotation provision range RA. The separation rotation imparting range RC by the separation assisting surface 42a of the separation assisting protrusion 42 overlaps with the separation holding range RB, and a separation holding range RD by the separation positioning surface 42b is set behind it. With this relationship, when the detachment position of the second group lens holding frame 6 is determined by the detachment assist protrusion 42, the transition from the pressed state by the detachment control protrusion 40 to the pressed state by the detachment assist protrusion 42 is smoothly performed. be able to.

  As shown in FIG. 7, the second group lens holding frame 6 rotated to the disengagement position as described above has the lens holding cylinder portion 6a entering the radial through hole 8h, and a part of the second group lens holding frame 6 moves to the second group lens. Projects to the outer diameter side of the frame 8. The lens holding cylinder portion 6a further enters a radial through hole 10e formed in the rectilinear guide ring 10 located outside the second group lens moving frame 8 (FIG. 2). Thus, the second lens group LG2 can be set to a large amount of movement out of the optical axis without being restricted by the second group lens moving frame 8 or the straight guide ring 10.

  When the lens barrel storage state shown in FIG. 2 is reached, the driving of the zoom motor 150 in the lens barrel storage direction is stopped. As shown in FIG. 2, in the retracted state of the zoom lens barrel ZL, substantially the entire zooming group (cam ring) block including the cam ring 11 is retracted into the housing 22, and the first lens group LG1 is moved to the shutter S. Retreats to a close position. Further, the lens holding tube portion 51a of the third group lens frame 51 enters the space in the second group lens moving frame 8 formed by the detaching operation of the second group lens holding frame 6, and the second group lens holding frame 6 Part of the lens holding cylinder 6a enters the second group lens housing recess 51d formed in the third group lens frame 51, and the second lens group LG2 and the third lens group LG2 are positioned in the same optical axis orthogonal plane. . As a result, the length in the optical axis direction of the photographing optical system (the distance from the object side surface of the first lens group LG1 to the imaging surface of the image sensor 26) is significantly shorter than the imaging state shown in FIG. A reduction in the storage length of the lens barrel ZL has been achieved.

  In order to obtain such a storage state excellent in space efficiency, it is necessary to reliably move the second group lens holding frame 6 to the designed separation position to prevent interference with other lens barrel components. The separation control projection 40 and the pressed projection 41 that are contact portions for moving the second group lens holding frame 6 away from the photographing position are in the vicinity of the rotation shaft 33 that is the rotation center of the second group lens holding frame 6. Therefore, the amount of detachment rotation by the detachment guide surfaces 40a and 41a per unit movement amount of the second group lens holding frame 6 in the optical axis direction can be increased. That is, the second group lens holding frame 6 can be largely rotated from the insertion position to the removal position with a small backward movement amount of the second group lens moving frame 8 holding the second group lens holding frame 6. This has the effect of improving the degree of design freedom in the internal structure of the zoom lens barrel ZL. On the other hand, the fact that the separation rotation amount per unit movement amount in the optical axis direction is large also increases the error range in terms of component accuracy, so that it is difficult to strictly position the second group lens holding frame 6. On the other hand, the second arm portion 6e extended in the direction substantially opposite to the shaft support portion 6c (first arm portion 6b) with respect to the lens holding cylinder portion 6a is a turning radius distance from the turning shaft 33. Since the second arm portion 6e and the separation assist projection 42 are used, strict position control of the second group lens holding frame 6 is facilitated. Particularly, when the second group lens holding frame 6 is pressed and rotated in the detachment direction by bringing the detachment assist surface 42a into contact with the second arm portion 6e (detachment assist surface 6h), the detachment guide surface 40a of the detachment control protrusion 40 is provided. Since the separation rotation amount per unit movement amount in the optical axis direction is smaller than the separation rotation by pressing, the second group lens holding frame 6 can be positioned with high accuracy. Accordingly, the zoom lens barrel ZL can be reliably moved to the housed state without causing the second group lens holding frame 6 to interfere with other lens barrel constituent members.

  Further, the second arm portion 6e that receives the position control by the separation assisting projection 42 has an insertion holding means for determining the insertion position of the second group lens holding frame 6 in the photographing state by bringing the insertion positioning surface 6f into contact with the positioning projection 8f. Therefore, the shape of the second group lens holding frame 6 does not become complicated. Since the separation assist projection 42 is integrally formed as a part of the image sensor holder 21 similarly to the separation control projection 40, the number of parts is not increased by providing the separation assist projection 42, and the configuration is inexpensive. can do. In addition, the image sensor holder 21 is a large fixing member fixed to the rear portion of the housing 22, and when the separation control projection 40 and the separation assist projection 42 press and rotate the second group lens holding frame 6, Since the force is received by the imaging element holder 21 which is a fixing member, the strength is also excellent.

  When the zoom lens barrel ZL is extended from the lens barrel storage state to the photographing state, an operation reverse to the above is performed. When the zoom motor 150 is driven in the lens barrel feeding direction, the cam ring 11 rotates and moves forward in the optical axis direction, and the feeding barrel 12 and the second group lens block 80 (second group lens moving frame 8) also move forward. To do. When the second group lens block 80 moves forward to a predetermined position, the second group lens holding frame 6 supported in the second group lens moving frame 8 is separated from the separation control projection 40 and the separation assist projection 42 and the insertion biasing spring 39 is attached. It is rotated from the disengagement position to the insertion position by the force. When the second group lens holding frame 6 rotates to the insertion position, the pair of front projecting portions 46 provided at the front end of the second group lens holding frame 6 becomes a phase facing the pair of concave portions 43 of the second group lens moving frame 8. Is moved to the forward movement position where the forward protrusion 46 enters the recess 43 by the biasing force of the forward biasing spring 38. As a result, the second lens group LG2 returns to the position in the photographing state shown in FIG.

  Eventually, when the zoom lens barrel ZL is extended by a predetermined amount, the zoom lens barrel ZL reaches the wide end of the zoom range shown in the upper half section of FIG. When the zoom motor 150 is driven from the wide end extended state in the telephoto direction (the same direction as when extending from the lens barrel retracted state to the wide end), the tele end extended state shown in the lower half section of FIG. The first lens group LG1 and the second lens group LG2 are fed out from the lens barrel storage state by the former moving amount of the cam ring 11 with respect to the housing 22 and the cam feeding amount of the feeding cylinder 12 with respect to the cam ring 11, respectively. The latter is determined as the sum of the amount of forward movement of the cam ring 11 relative to the housing 22 and the amount of cam extension of the second group lens block 80 relative to the cam ring 11. Zooming is performed by moving the first lens group LG1 and the second lens group LG2 along the optical axis O while changing the air interval between them. In the zoom range, focusing is performed by moving the third lens group frame 51 in the optical axis direction by the AF motor 160.

  As described above, according to the zoom lens barrel ZL of the present embodiment, the second lens group holding frame 6 that holds the second lens group LG2 is reliably rotated to the disengaged position when the photographing state is changed to the retracted state. Thus, it is possible to perform a highly accurate storing operation without interference of members while achieving a reduction in size in the storing state.

  As mentioned above, although demonstrated based on illustration embodiment, this invention is not limited to this. For example, in the illustrated embodiment, the second group lens holding frame 6 moves back and forth in the optical axis direction while rotating within the second group lens moving frame 8 when switching between the photographing state and the storage state. The present invention can also be applied to a configuration in which the second group lens holding frame 6 swings at a certain position in the optical axis direction within the second group lens moving frame 8 without moving back and forth.

  In the illustrated embodiment, the separation guide surfaces 40a and 41a are formed on both the separation control projection 40 and the pressed projection 41, and the separation assist surfaces 42a and 6h are formed on both the separation assist projection 42 and the second arm portion 6e. However, it is also possible to adopt a mode in which the separation guide surface and the separation assist surface are formed only on either the imaging element holder 21 side or the second group lens holding frame 6 side. For example, in the second arm portion 6e of the second group lens holding frame 6, the rear assist surface 6h is not formed, but the rear surface of the second arm portion 6e and the separation positioning surface 6g are directly adjacent to each other, and the boundary between the both surfaces Even when the portion (right-angled cross-section) is in contact with the separation assist surface 42a of the separation assist projection 42, the second group lens holding frame 6 is pressed and rotated to the disengagement position by pressing the separation assist surface 42a. be able to.

  Further, in the illustrated embodiment, the separation control projection 40 and the separation assist projection 42 are projected on the image sensor holder 21, which is a preferable structure in terms of strength as described above. However, the portions corresponding to the separation control projection 40 and the separation assist projection 42 are at least other than the image sensor holder 21 as long as they can abut against the second group lens holding frame 6 that moves backward and can be pressed toward the separation position. It can also be provided on a member, for example, the third group lens frame 51 or the like.

6 2 group lens holding frame (insertion / removal operation member)
6a Lens holding cylinder part (holding part for insertion / removal optical element)
6b First arm portion 6c Shaft support portion 6d Shaft hole 6e Second arm portion 6f Insertion positioning surface (insertion holding means)
6g Detachment positioning surface 6h Detachment assist surface 8 2 group lens moving frame (advance / retreat member)
8e Spring receiving portion 8f Positioning protrusion (insertion holding means)
8h Radial direction through hole 10 Straight guide ring 10e Radial direction through hole 11 Cam ring 12 Feeding cylinder 21 Imaging element holder (rear member)
22 Housing 26 Image Sensor 33 Rotating Shaft 36 Axis Stopping Member 38 Advance Energizing Spring 39 Inserting Energizing Spring (Insertion Holding Means, Energizing Member)
40 Separation control protrusion (first separation control member)
40a Detachment guide surface 40b Detachment holding surface 41 Pressed protrusion (pressed portion)
41a Detachment guide surface 41b Detachment holding surface 42 Detachment auxiliary protrusion (second desorption control member)
42a Detachment assisting surface 42b Detachment positioning surface 51 Third group lens frame 51d Second group lens storage recess 80 Second group lens block 100 Shutter block 150 Zoom motor 160 AF motor CF1 First group cam follower CF2 Second group cam follower CG1 First group control cam groove CG2 Second group control cam groove LG1 First lens group LG2 Second lens group (insertion / removal optical element)
LG3 Third lens group ZL Zoom lens barrel

Claims (5)

An advancing / retracting member that is movable in the optical axis direction of the photographic optical system and moves backward in the optical axis direction when the imaging state is changed to the retracted state;
An insertion position and an optical axis for holding an insertion / removal optical element constituting the photographing optical system and for positioning the insertion / removal optical element on the optical axis about a rotation axis substantially parallel to the optical axis with respect to the advance / retreat member An insertion / removal operation member rotatably supported at a disengagement position in a direction away from the top;
Insertion holding means for holding the insertion / removal operation member at the insertion position in a photographing state; and the insertion / removal member at the insertion position by moving the advancing / retreating member backward in the optical axis direction when the photographing state is changed to the storage state. A detachment driving means for rotating the detachable operation member from the position to the disengagement position and holding the insertion / removal operation member at the disengagement position in the stored state;
With
The insertion / removal operation member includes a holding portion that holds the insertion / removal optical element, a first arm portion and a second arm portion that protrude from the holding portion in different outer diameter directions, and the first arm portion. Having a shaft support portion provided at the tip and supported by the rotation shaft;
The above detachment driving means is
When the insertion / removal operation member moves rearward in the optical axis direction together with the advance / retreat member, a first release control member that contacts the pressed portion provided on the shaft support and presses the insertion / removal operation member toward the release position. And when the advancing / retreating member is at the rearward movement end in the retracted state, the second member is positioned at a position that restricts movement of the insertion / removal operation member from the disengagement position of the second arm portion toward the insertion position. Detachment control member;
A lens barrel comprising: The lens barrel according to claim 1, wherein at least one of the second arm part of the second detachment control member and the insertion / removal operation member has a detachment assisting surface inclined with respect to the optical axis,
When the insertion / removal operation member moves rearward in the optical axis direction, the insertion / removal operation member moves in the direction of the separation position when the second arm portion and the second separation control member come into contact with each other via the separation assist surface. A lens barrel pressed to 3. The lens barrel according to claim 2, wherein when the photographing state is changed to the retracted state, the second separation control member is more than a pressing operation in the direction of the separation position by the first separation control member with respect to the insertion / removal operation member. The lens barrel is operated at a later timing of the pressing operation. The lens barrel according to any one of claims 1 to 3, wherein the insertion holding means is
An urging member that urges the insertion / removal operation member in the insertion position direction; and a second arm portion of the insertion / removal operation member, which is in contact with a part of the advance / retreat member by the urging force of the urging member. An insertion positioning surface for determining the insertion position of the insertion / removal operation member;
A lens barrel. 5. The lens barrel according to claim 1, wherein the first detachment control member and the second detachment control member are respectively located rearward of the advance / retreat member in a photographing state and a retracted state. A lens barrel that is a protrusion that is formed integrally with the member and protrudes forward in the optical axis direction.

Images