JP2020071314A - Lens barrel - Google Patents

Abstract

To provide a lens barrel having a movement switching mechanism that has an enough strength so that switching operations are not performed carelessly and allows simple locking operations and unlocking operations.SOLUTION: A lens barrel includes: a first operation ring 12 that can move to a first movement position and a second movement position in an optical axis O direction, is rotatably arranged about an optical axis, and generates a drive force to move a lens holding frame 45 to the optical axis direction in accordance with at least one operation of movement in the optical axis direction and rotation about the optical axis; a second operation ring 21 that moves to the first or second movement position together with the first operation ring in conjunction with the movement of the first operation ring to the optical axis direction and can rotatably operate to a first rotational position and a second rotational position when the first operation ring is positioned at the first movement position; and a control ring 22 that is arranged to be fixed to the optical axis, prevents the movement of the second operation ring to the optical axis direction when the second operation ring is rotated to the first rotational position, and allows the movement of the second operation ring to the optical axis direction when the second operation ring is rotated to the second rotational position.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a lens barrel having a manual focus clutch mechanism.

  Conventionally, an image pickup apparatus such as a digital camera configured to obtain image data by photoelectrically converting an optical image formed by an image pickup optical system using an image pickup element or the like has been put into practical use and widely spread. ..

  In a lens barrel used for this type of image pickup apparatus, one configured such that switching between autofocus (AF) operation and manual focus (MF) operation can be performed separately from a setting menu on the image pickup apparatus side, Various proposals have been made, for example, in Japanese Patent No. 5412471.

  The lens barrel disclosed in Japanese Patent No. 5412471 or the like is configured such that a focus adjusting operation member (focus ring) is slidable within a predetermined range in a direction along the optical axis. When the focus ring is placed in the first position on the front end side, it operates in the operation mode in which normal autofocus (AF) control is performed, while when the focus ring is placed in the second position on the rear end side, the setting menu operation is performed. There is disclosed a lens barrel equipped with a so-called manual focus clutch mechanism, which is configured to switch to the manual focus mode instantaneously.

  On the other hand, in the conventional lens barrel, when the lens barrel and the image pickup device are not used, such as when carrying the camera around, the overall length of the lens barrel should be shorter than that during normal shooting. Various so-called collapsible lens barrels, which are configured so that they can be used, have been proposed and put into practical use, for example, in Japanese Patent Laid-Open No. 2010-286789.

  In the retractable lens barrel disclosed in Japanese Unexamined Patent Application Publication No. 2010-286789, the photographing lens is moved by a rotating operation in the photographing area and the collapsing area, and the collapsing area side of the end portion of the photographing area. At the end of the zoom ring, a zoom ring that can be operated in the direction of the optical axis and a lock member that restricts the switching of the zoom ring from the shooting area to the retracted area are provided. When the zoom ring is located at the end of the retractable area side of the above, if the shooting state is maintained by prohibiting the rotation operation of the zoom ring toward the retractable area side and the straight-forward operation is performed on the zoom ring at the end It is configured to release the prohibition of the rotation operation of the zoom ring toward the collapsed region side and allow the switch to the collapsed state.

  With such a configuration, in the retractable lens barrel disclosed in JP 2010-286789 A or the like, an unintended switching operation from the photographing state to the retracted state is prevented.

Japanese Patent No. 5412471 JP, 2010-286789, A

  However, the configuration of the lens barrel disclosed in Japanese Patent No. 5412471 and the like is such that the manual focus operation mode can be easily switched by only the sliding operation in the direction along the optical axis of the focus ring. There is. Therefore, the focus ring may move, for example, when the user (user) does not intend, depending on the situation when using the image pickup apparatus in which the lens barrel is mounted. In such a case, when the user starts using the image pickup apparatus, an operation that the user does not expect will be performed (it does not move as the user expects), and the user takes the image pickup. There is a possibility of misunderstanding that the device has failed.

  Specifically, for example, there is a case in which the user carries the image pickup device equipped with the lens barrel in a bag or the like. In this case, the user takes out the imaging device from the bag when using the imaging device.

  In such a situation, for example, the focus ring may move against the user's will, due to the movement of the imaging device in the bag being transported. Further, when the user takes out the image pickup device from the bag when using the image pickup device, the focus ring may move against the user's intention by touching a part of the bag or the like. ..

  In this way, when the focus ring moves against the user's will, unless the user is aware of it, the operation of the imaging device is against the user's intention. In particular, if the focus ring moves to the rear end side and switches to the manual focus operation mode while the user is trying to use the auto focus operation mode, the imaging device does not seem to operate. It is a problem because it may look like. Therefore, a device for preventing the focus ring from moving in the direction along the optical axis against the intention of the user is desired.

  On the other hand, as described above, the retractable lens barrel disclosed in JP 2010-286789 A prevents unintended switching operation from the photographing state to the retracted state. In other words, the configuration disclosed in the publication and the like prevents the lens barrel from unintentionally switching to the retracted state, which is the unused state, while the lens barrel is being used in the photographing state.

  However, in a lens barrel having a manual focus clutch mechanism, such as the lens barrel disclosed in Japanese Patent No. 5412471, etc., the user, at the arbitrary timing during use in the shooting state, Switching operation may be performed at any time. Even in such a case, it is necessary that the shooting state is always maintained before and after the switching operation.

  The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide a lens barrel having a manual focus clutch mechanism, in which a switching operation is sufficiently performed so as not to be inadvertently performed. (EN) Provided is a lens barrel having a strength and a movement switching mechanism capable of easily performing a locking operation and an unlocking operation.

  In order to achieve the above object, the lens barrel of one aspect of the present invention is arranged so as to be movable along an optical axis into a first moving position and a second moving position and rotatable about the optical axis. A first operation ring for generating a driving force for moving the lens holding frame in the optical axis direction in response to at least one of the movement operation in the optical axis direction and the rotation operation around the optical axis; and the first operation. The first operating ring is moved to the first moving position or the second moving position together with the first operating ring in conjunction with the movement of the ring in the optical axis direction, and the first operating ring is located at the first moving position. At this time, the second operation ring, which is operable to rotate between the first rotation position and the second rotation position, and the position fixed to the optical axis, and the second operation ring is rotated to the first rotation position. When this is done, the second operation ring is prevented from moving in the optical axis direction, Serial second operating ring is equipped with a control ring to which the second operating ring is allowed to move in the optical axis direction when rotated in the second rotational position.

  According to the present invention, in a lens barrel having a manual focus clutch mechanism, a lens barrel having sufficient strength so that a switching operation is not inadvertently performed, and a lock operation and an unlock operation can be easily performed. A lens barrel including a switching mechanism can be provided.

External view showing the external appearance of the lens barrel of one embodiment of the present invention 1 is a vertical cross-sectional view showing a cut surface of the lens barrel of FIG. 1 taken along the optical axis. Exploded perspective view of the lens barrel of FIG. FIG. 1 is an exploded perspective view of essential parts showing the constituent members of the movement switching mechanism of the focus ring (first operation ring) in the lens barrel of FIG. FIG. 5 is an enlarged cross-sectional view of an essential part of the constituent members of the movement switching mechanism of FIG. 4 in which the vicinity of the rotation operation portion is enlarged and illustrated (enlarged cross-sectional view of a region indicated by reference sign [A] in FIG. 2). FIG. 4 is an exploded perspective view of essential parts showing the movement switching mechanism viewed from a different direction. FIG. 6 is an exploded perspective view of essential parts showing a state in which the movement switching mechanism of FIG. 6 is combined. Of the constituent members of the movement switching mechanism of FIG. 4, three views of a fixed ring (control ring) Of the constituent members of the movement switching mechanism of FIG. 4, three views of the fixed ring operation ring (second operation ring) FIG. 3 is an enlarged sectional view of an essential part showing a first state of the movement switching mechanism in the lens barrel of the embodiment of the present invention. FIG. 10 is an enlarged perspective view of a main part of the movement switching mechanism in the state of FIG. FIG. 3 is an enlarged sectional view of an essential part showing a second state of the movement switching mechanism in the lens barrel of the embodiment of the present invention. FIG. 12 is an enlarged perspective view of a main part of the movement switching mechanism in the state of FIG. FIG. 3 is an enlarged cross-sectional view of an essential part showing a third state of the movement switching mechanism in the lens barrel of the embodiment of the present invention. FIG. 14 is an enlarged perspective view of an essential part of the movement switching mechanism in the state shown in FIG.

  Hereinafter, the present invention will be described with reference to the illustrated embodiments. Each drawing used in the following description is schematically shown, and in order to show each constituent element in a size that can be recognized on the drawing, the dimensional relationship and scale of each member may be different for each constituent element. It may be shown. Therefore, the present invention is limited to the illustrated form with respect to the quantity of each constituent element described in each drawing, the shape of each constituent element, the ratio of the size of each constituent element, the relative positional relationship of each constituent element, and the like. It is not limited.

  According to an embodiment of the present invention, for example, an optical image formed by an imaging optical system is converted into a CCD (Charge Coupled Device) image sensor or a CMOS (Complementary Metal Oxide Semiconductor) type image sensor. Photoelectric conversion is sequentially performed using a photoelectric conversion element such as an image sensor (hereinafter referred to as an image pickup element), and the image signal obtained by this is image data in a predetermined form (for example, digital image data representing a still image or a moving image). And an image display device for reproducing and displaying a still image or a moving image based on digital image data recorded in the storage medium, such as a liquid crystal display (LCD) or organic electroluminescence (LCD). Organic EL; Organic Electro-Luminescence (OEL) Image pickup device including a display and the like , For example, illustrate the lens barrel is applied to a digital camera, a video camera or the like.

  A lens barrel according to an embodiment described below is exemplified as an interchangeable lens barrel used in a so-called interchangeable lens type image pickup device, in which the lens barrel is configured to be attachable to and detachable from the image pickup device body. is doing. However, the form of the lens barrel to which the present invention can be applied is not limited to this type of interchangeable lens barrel. For example, the same can be applied to a lens barrel used for a so-called lens-integrated image pickup device, which is configured by integrally fixing an image pickup device main body and a lens barrel.

  Further, in the following one embodiment, the optical axis of the image pickup optical system in the lens barrel is represented by the symbol O. In the direction along the optical axis O, the side facing the front surface of the lens barrel (that is, the side with the subject) is referred to as the front. Further, the side opposite to the front side of the lens barrel along the optical axis direction and the side where the lens barrel is connected to the imaging device body (that is, the side where the lens mount ring is located) is referred to as the rear side. .. Further, it is assumed that the image pickup apparatus main body that houses the image pickup element is arranged behind the lens barrel.

  Therefore, with such a configuration, the reflected light of the subject (hereinafter referred to as the subject light) is incident on the imaging optical system in the lens barrel from the front of the lens barrel. The subject light incident from the front of the lens barrel travels in the direction along the optical axis through the imaging optical system of the lens barrel. At that time, the imaging optical system forms an optical image of a subject (hereinafter referred to as a subject image). Then, the subject image is formed on the light receiving surface of the image pickup element arranged behind the lens barrel.

[One Embodiment]
1 to 9 are diagrams showing an embodiment of the present invention. Of these, FIG. 1 is an external view showing the external appearance of the lens barrel of the present embodiment. FIG. 2 is a vertical cross-sectional view showing a cut surface of the lens barrel of FIG. 1 taken along the optical axis. FIG. 3 is an exploded perspective view of the lens barrel of FIG. FIG. 4 is an exploded perspective view of essential parts showing the constituent members of the movement switching mechanism of the focus ring (first operation ring) in the lens barrel of FIG. FIG. 5 is an enlarged cross-sectional view of an essential part of the constituent members of the movement switching mechanism of FIG. 4 in which the vicinity of the rotation operation portion is enlarged (enlarged cross-section of the area indicated by reference numeral [A] in FIG. Figure). FIG. 6 is an exploded perspective view of essential parts showing the movement switching mechanism as viewed from a direction different from that of FIG. FIG. 7 is an exploded perspective view of essential parts showing a state in which the movement switching mechanisms of FIG. 6 are combined. Note that FIG. 7 shows a state (AF free state) in which the focus ring (first operation ring) is in the first movement position and the fixed ring operation ring (second operation ring) is in the second rotation position. FIG. 8 is a three-view drawing of a fixed ring (control ring) among the constituent members of the movement switching mechanism of FIG. In FIG. 8, reference numeral [22A] is a plan view. Further, in FIG. 8, reference numerals [22B] and [22C] are side views, respectively. FIG. 9 is a three-sided view of the fixed ring operation ring (second operation ring) among the constituent members of the movement switching mechanism of FIG. In FIG. 9, reference numeral [21A] is a plan view. Further, in FIG. 9, reference numerals [21B] and [21C] are side views, respectively.

  First, a schematic configuration of a lens barrel according to an embodiment of the present invention will be described below with reference to FIGS.

  The lens barrel 1 of this embodiment includes an index display frame 11, a focus ring 12 that is a first operation ring, a distance display ring 13, a sliding ring 14, an intermediate ring 15, a fixed barrel 16, and a lens. Ring 17, zoom operation ring 18, rear exterior cylinder 19, movement switching mechanism 20 (movement switching unit), lens mount ring 26, and a plurality of optical lens groups (31 to 36) forming an imaging optical system. And a plurality of lens holding frames (41 to 46) and the like.

  The index display frame 11 is an annular member provided at the most distal end of the lens barrel 1. The index display frame 11 is formed with a bayonet groove for mounting an accessory (not shown) such as a lens hood. Therefore, the indicator display frame 11 is provided with an accessory attachment indicator (not shown).

  The focus ring 12 is an operation member used when a user (user) manually performs a focus adjustment operation, and is a first operation ring in the lens barrel 1. Therefore, the outer surface of the focus ring 12 is arranged so as to be exposed to the outermost peripheral surface side of the lens barrel 1.

  The focus ring 12 has a predetermined focus lens group (in this example, reference numeral 35 in FIG. 2) of a plurality of optical lens groups (described later; refer to reference numerals 31 to 36 in FIG. 2) included in the imaging optical system. An operation for generating a driving force for moving the lens holding frame (reference numeral 45 in FIG. 2 in the lens barrel 1 of this example) in the direction along the optical axis O in accordance with the rotation operation around the optical axis O. It is a member.

  Further, the focus ring 12 moves a predetermined lens holding frame (reference numeral 42) in the optical axis direction in accordance with the movement in the optical axis direction (for example, when moving from a first moving position to a second moving position described later). Generate a driving force to move to.

  The focus ring 12 is formed in a substantially annular shape and slides within a predetermined range between the first moving position and the second moving position in the direction along the optical axis O of the imaging optical system of the lens barrel 1. It is configured to be freely rotatable as well as rotatable about the same optical axis O.

  More specifically, the focus ring 12 has a first moving position on the subject side (front side) in the direction along the optical axis O (direction of arrow X in FIG. 1) and a lens mount ring side (rear side) in the direction along the optical axis O. ) Is arranged so as to be slidable between the second movement position and the second movement position.

  In this case, when the focus ring 12 is in the first movement position (see FIGS. 10 and 12 described later), the locking portion 15a (fixed portion) of the intermediate ring 15 and the locking portion 17a (moving movement) of the tooth ring 17 are moved. (A part) abuts in the direction along the optical axis O, thereby restricting the slide movement of the focus ring 12 forward of the first movement position.

  Further, when the focus ring 12 is in the second movement position (see FIG. 14, which will be described later), the locking portion 12b (moving portion) provided at the tip of the focus ring 12 and the locking portion 13a of the distance display ring 13 ( By making contact with the fixed portion in the direction along the optical axis O, the focus ring 12 is restricted from sliding rearward from the second movement position.

  When the rotation operation is performed by the user while the focus ring 12 is at the first movement position, a predetermined action is performed according to the focus control setting on the imaging device main body (not shown) side. For example, when the focus control setting on the main body of the image pickup apparatus (not shown) is set to “AF + MF”, the focus ring 12 is moved after the autofocus operation is performed by half-pressing the shutter button (not shown) or pressing the AF button. A manual focus operation can be performed by rotating operation. Further, when the focus control setting on the main body of the image pickup apparatus (not shown) is set to "MF", the manual focus operation can be performed by rotating the focus ring 12 at any time. There is no restriction on the rotation range of the focus ring 12 when the focus ring 12 is in the first movement position, and the focus ring 12 can be rotated in the forward and reverse directions without any limit.

  On the other hand, when the focus ring 12 is at the second movement position, the manual focus operation is always performed when the rotation operation is performed by the user regardless of the focus control setting on the imaging device body (not shown) side. In this case (when the focus ring 12 is in the second movement position), the rotation of the focus ring 12 is restricted so as to rotate in the forward and reverse directions within a predetermined rotation range. In this case, the rotation range is from the shortest imaging distance position displayed on the distance display ring 13 described later to the infinity position.

  When the focus ring 12 is slid by the user from the first movement position to the second movement position, the lens holding frame 42 that holds the focus lens group 34 displays the distance at that time. It is driven in the optical axis direction to the focus position corresponding to the distance set value set by the ring 14 (the distance set value of the distance display ring 14 when the focus ring 12 was used at the second movement position last time). ..

  The drive control for moving the lens holding frame 42 in the optical axis direction by sliding the focus ring 12 in the optical axis direction is performed when the focus ring 12 slides from the second moving position to the first moving position. May be configured to perform similarly. Further, such drive control may be performed only when the focus ring 12 moves from the first movement position to the second movement position, or from the second movement position of the focus ring 12 to the first movement position. It may be only when moving.

  As described above, in the present lens barrel 1, the focus ring 12 is slid between the first movement position and the second movement position, so that the focus ring 12 is moved between the focus ring 12 and the predetermined lens holding frame (42). The manual focus clutch mechanism is provided for switching connection or disconnection of the power transmission mechanism. The detailed configuration of the manual focus clutch mechanism itself is a portion that is not directly related to the present invention, and thus the description thereof is omitted.

  The distance display ring 13 is a substantially annular member that is fixedly provided on the outer peripheral side near the front end of the fixed barrel 16 and has an imaging distance index stamped on its outer surface. The distance display ring 13 has an outer surface covered by the focus ring 12 when the focus ring 12 is located at the first movement position, and an imaging distance when the focus ring 12 is located at the second movement position. The index is arranged so as to be exposed to the outside.

  The sliding ring 14 is a substantially annular member that is fixedly provided on the outer peripheral side of the fixed cylinder 16 and behind the distance indicating ring 13. A component unit (details will be described later) including the focus ring 12 is arranged on the outer peripheral side of the sliding ring 14. The slide ring 14 is a component member that holds the component unit including the focus ring 12 so that the component unit (sliding movement in the optical axis direction and rotational movement around the optical axis) can be performed smoothly and freely.

  The intermediate ring 15 is a substantially annular member on which various electric components (not shown) such as a photo interrupter and an AF / MF changeover switch are mounted. The intermediate ring 15 is fixed on the outer peripheral surface of the fixed cylinder 16.

  With a photo interrupter (not shown) mounted on the intermediate ring 15 and a photo interrupter slit 22e (see FIG. 5 and the like) provided in a fixed ring 22 (control ring; details will be described later) that rotates together with the focus ring 12, The rotation position of the focus ring 12 is detected.

  The fixed barrel 16 holds fixed members such as the distance display ring 13, the sliding ring 14, the intermediate ring 15, the rear side outer barrel 19 and the like on the outer peripheral side, and has a structural unit such as an imaging optical system and a drive mechanism thereof inside thereof. It is a fixed cylinder member in which and are accommodated.

  The tooth ring 17 is a substantially annular member that is fixed to the rear end portion of the focus ring 12. This ring 17 is a component provided to regulate the movement of the focus ring 12 in the direction along the optical axis O.

  The zoom operation ring 18 is an operation member used when the user manually performs a zooming operation. That is, the zoom operation ring 18 is a third operation ring for setting a function different from that of the focus ring 12 (first operation ring) in the lens barrel 1. The outer surface of the zoom operation ring 18 is arranged so as to be exposed to the outermost peripheral surface side of the lens barrel 1. In this case, the zoom operating rings 18 are arranged rearward of the focus ring 12 in the direction along the optical axis O.

  The rear exterior cylinder 19 is an exterior member that is provided outside the fixed cylinder 16 and covers the outer surface of the present lens barrel 1 toward the rear. A lens mount ring 26 is attached to the rear end surface of the rear exterior cylinder 19. The lens mount ring 26 is a member for connecting to the image pickup apparatus main body (not shown).

  The movement switching mechanism 20 is a movement switching unit for switching whether or not the focus ring 12 (first operation ring) can move in the direction along the optical axis O (that is, block or permit movement). Therefore, the movement switching mechanism 20 includes a fixed ring operation ring 21 that is a second operation ring, a fixed ring 22 that is a control ring, and an operation button 23 that is a rotation operation unit. The detailed configuration and operation of the movement switching mechanism 20 will be described later.

  Further, in the present lens barrel 1, a plurality of optical lens groups (31 to 36) forming the image pickup optical system, a plurality of lens holding frames (41 to 45) respectively holding the plurality of optical lens groups, and the like are provided. It is configured to have. In the lens barrel 1 illustrated in the present embodiment, for example, the lens groups 31, 32, 33, 34, 36 are fixed and held by the lens holding frames 41, 42, 43, 44, 46, respectively. The focus lens group 35 is fixed and held by a lens holding frame 45.

  Of these, the lens holding frame 45 is configured to be movable in the direction along the optical axis O by a predetermined driving mechanism. Although not shown, a predetermined power transmission mechanism is interposed between the lens holding frame 45 and the focus ring 12. The power transmission mechanism between the lens holding frame 45 and the focus ring 12 is configured so that it can be switched between the connected state and the disconnected state by the manual focus clutch mechanism.

  Further, the manual focus clutch mechanism is configured such that its action can be permitted or blocked by the movement switching mechanism 20.

  Here, the detailed configuration of the movement switching mechanism 20 in the lens barrel 1 of the present embodiment will be described below with reference to FIGS. 4 to 9.

  As described above, the movement switching mechanism 20 is a movement switching unit for switching whether the movement of the focus ring 12, which is the first operation ring, in the direction along the optical axis O is possible (that is, the movement is blocked or permitted). Therefore, the movement switching mechanism 20 is configured by a fixed ring operation ring 21 (second operation ring), a fixed ring 22 (control ring), and an operation button 23 that is a rotation operation unit.

  In the movement switching mechanism 20, when the fixed ring operating ring 21 (second operating ring) and the fixed ring 22 (control ring) contact each other in the direction along the optical axis O, the focus ring 12 (first operating ring) moves. When the movement in the direction along the optical axis O is blocked and the focus ring 12 (first operating ring) is not blocked in the direction along the optical axis O, the fixed ring operating ring 21 (second operating ring). And the fixed ring 22 (control ring) are relatively movable in the direction along the optical axis O.

  The fixed ring operating ring 21 moves to the first movement position or the second movement position together with the focus ring 12 in conjunction with the sliding movement of the focus ring 12 in the direction along the optical axis O, and the focus ring 12 moves to the first movement position. When located at the movement position, the rotation operation is possible within a predetermined rotation range around the optical axis O (between the first rotation position and the second rotation position).

  Here, the fixed ring operating ring 21 is fixed on the inner peripheral surface of the focus ring 12 by being sandwiched between the locking portion 12c and the locking portion 17b of the tooth ring 17. As a result, the fixed ring operating ring 21 moves in the same direction as the focus ring 12 along with the sliding movement of the focus ring 12 in the direction along the optical axis O.

  Then, when the focus ring 12 is at the first movement position, the fixed ring operation ring 21 is rotated at one of the first rotation position and the second rotation position to perform a rotation operation, whereby the present lens barrel The action of the manual focus clutch mechanism provided in 1 is permitted (that is, the slide movement of the focus ring 12 in the direction along the optical axis O is permitted), or the action of the manual focus clutch mechanism is blocked (that is, The sliding movement of the focus ring 12 in the direction along the optical axis O is prevented).

  When the fixed ring operation ring 21 is rotated to the other of the first rotation position and the second rotation position, the operation of the manual focus clutch mechanism provided in the lens barrel 1 is blocked. (That is, the slide movement of the focus ring 12 in the direction along the optical axis O is blocked), or the operation of the manual focus clutch mechanism is permitted (the slide movement of the focus ring 12 is permitted).

  The focus ring 12 is always permitted to rotate about the optical axis O regardless of whether it is in the first movement position or the second movement position.

  The fixed ring operation ring 21 is formed in a substantially annular shape as a whole, and is arranged on the inner surface side of the portion near the rear end of the focus ring 12. The fixed ring operation ring 21 is formed to have an annular body portion 21a, a first protruding portion 21b, a thrust regulating portion 21c, a sliding allowance area 21d, and a button placement hole 21e.

  The circular ring main body portion 21a is a main body portion of the fixed ring operation ring 21, and is a basic constituent member formed in a circular ring shape. The first projecting portion 21b and the thrust regulating portion 21c are formed so as to extend from the outer peripheral edge portion of the annular body portion 21a in the direction along the optical axis O. Similarly, a button arranging portion 21f having a button arranging hole 21e is formed from the outer peripheral edge of the annular body 21a in the direction along the optical axis O.

  The first projecting portion 21b is a fin-shaped portion that projects in a direction along the optical axis O from the outer peripheral edge portion of the fixed ring operating ring 21 (second operating ring). A plurality of the first protruding portions 21b are formed on the peripheral surface of the annular body portion 21a at predetermined intervals. In this embodiment, an example in which six first protrusions 21b are provided is shown.

  The thrust restricting portion 21c is pinched between the locking portion 12c of the focus ring 12 and the locking portion 17b of the tooth ring 17 together with the button placement portion 21f, so that the fixed ring operating ring 21 moves in the thrust direction. Is a component part that regulates and fixes to the focus ring 12.

  The thrust restricting portion 21c is a fin-like portion that protrudes in the direction along the optical axis O from the outer peripheral edge portion of the fixed ring operating ring 21 (second operating ring) similarly to the first projecting portion 21b. The protrusion amount is slightly larger than that of the first protrusion 21b. A plurality of thrust restricting portions 21c are formed on the circumferential surface of the annular body portion 21a at predetermined intervals. In this embodiment, an example in which two thrust restricting portions 21c are provided is shown.

  The sliding allowance area 21d refers to an area of a portion where the first protrusion 21b and the thrust regulating portion 21c are adjacent to each other.

  The button placement hole 21e is a hole formed for placing the operation button 23, which is a rotation operation unit. The button placement hole 21e is formed in the button placement portion 21f. The button arranging hole 21e is bored through in the radial direction of the fixed ring operating ring 21 in a substantially central portion of the button arranging portion 21f.

  The button arranging portion 21f is an arc-shaped flat surface formed so as to extend in the direction along the optical axis O from the outer peripheral edge portion of the annular body portion 21a in substantially the same manner as the thrust regulating portion 21c and the first protruding portion 21b. It is a department. As described above, the button placement hole 21e is formed in the button placement portion 21f. The button placement portion 21f also has the same function as the thrust restriction portion 21c, as described above.

  The button placement hole 21e is provided with an operation button 23, which is a rotation operation unit for the user to perform a rotation operation. At this time, the outer surface of the operation button 23 is arranged so as to be exposed to the outermost peripheral surface side of the lens barrel 1.

  As described above, the fixed ring operation ring 21 is arranged on the inner surface side of the focus ring 12 with the operation button 23 arranged in the button arrangement hole 21e. Then, in this state, in order to expose the outer surface of the operation button 23 to the outside, the focus ring 12 (first operation ring) is provided with an opening 12a (see FIGS. 1 and 3). .. The opening 12a is formed as a substantially rectangular through opening extending in the circumferential direction of the focus ring 12. The operation button 23 (rotation operation part) arranged in the opening 12a is arranged movably within a predetermined range in the circumferential direction in the opening 12a. Therefore, the operation button 23 is arranged to be rotatable around the optical axis O with respect to the focus ring 12. With such a configuration, when the operation button 23 is rotationally operated within the opening 12a, the fixed ring operating ring 21 rotates around the optical axis O within a predetermined range (within the opening 12a).

  In this case, when the operation button 23 is arranged at one end of the opening 12a in the circumferential direction, the position thereof is referred to as a first rotation position. Further, when the operation button 23 is arranged at the other end of the opening 12a in the circumferential direction, that position is referred to as a second rotation position.

  As shown in FIG. 6, the operation button 23 is provided with a leaf spring-like urging member 23a on the back surface side. The urging member 23a urges the operation button 23 radially outward when the operation button 23 is arranged in the button arrangement hole 21e. When the operation button 23 is in this state, the rotation movement of the operation button 23 is restricted by a restriction unit (not shown).

  Therefore, when the operation button 23 is rotationally operated between the first rotation position and the second rotation position within the opening 12a, first, the operation button 23 is pushed down by a predetermined amount against the biasing force of the biasing member 23a. After this state, the rotation operation is performed while maintaining the state. As a result, the operation button 23 is restricted in rotation in the normal state.

  That is, the operation button 23 is in a fixed state with respect to the focus ring 12 in a normal state and is restricted in rotation. On the other hand, when the operation button 23 is pressed down, the fixed state with respect to the focus ring 12 is released. As a result, the interlock between the focus ring 12 and the fixed ring operation ring 21 is also released, so that the rotation operation of the fixed ring operation ring 21 is allowed. In this case, the rotation operation of the fixed ring operation ring 21 is a rotation operation between the first rotation position and the second rotation position in the opening 12a of the operation button 23.

  With such a configuration, the fixed ring operation ring 21 is configured to be capable of being manually rotated by the user via the operation button 23. Therefore, at this time, the fixed ring operating ring 21 functions as the second operating ring in the lens barrel 1.

  The operation button 23 and the opening 12a are arranged so that substantially all of them are exposed to the outside when the focus ring 12 (first operation ring) is at the first movement position. Accordingly, when the focus ring 12 is at the first movement position, the rotation operation of the fixed ring operation ring 21 by the operation button 23 can be easily performed. On the other hand, when the focus ring 12 is slid to the second movement position, at least a part of the operation button 23 and the opening 12a is configured to be covered by the front end portion of the zoom operation ring 18 (third operation ring). ing.

  With such a configuration, the rotation operation of the fixed ring operation ring 21 by the operation button 23 can be easily performed when the focus ring 12 is at the first movement position, while it can be easily performed when the focus ring 12 is at the second movement position. It is configured so that it cannot be done.

  In this case, when the focus ring 12 is at the second movement position, the movement of the focus ring 12 in the direction along the optical axis O is always permitted. Therefore, in this state, the focus ring 12 can be slid to the first movement position at any time.

  On the other hand, when the focus ring 12 is in the first movement position, when the fixed ring operation ring 21 (second operation ring) rotates to the first rotation position, the fixed ring 22 has the fixed ring operation ring 21 (second ring). 2 operation ring) is prevented from moving in the direction along the optical axis O, and when the fixed ring operation ring 21 (second operation ring) is rotated to the second rotation position, the fixed ring operation ring 21 (second operation ring) is rotated. 2 operation ring) is a control ring that allows movement in the direction along the optical axis O.

  Since the fixed ring 22 is sandwiched between the sliding ring 14 and the intermediate ring 15 in the direction along the optical axis O, the fixed ring 16 of the fixed barrel 16 is restrained from moving in the direction along the optical axis O. It is arranged on the outer peripheral surface. Further, the fixed ring 22 is configured to be rotatable in this state in conjunction with the rotation of the focus ring 12 around the optical axis O.

  The fixed ring 22 (control ring) is formed to have a fixed ring main body 22a, a second protruding portion 22b, a slide portion 22c, a passable region 22d, a photo interrupter slit 22e, and 22f. ..

  The fixing ring main body 22a is a basic constituent member configured as a main body of the fixing ring 22. The fixing ring body 22a is formed in a substantially annular shape as a whole.

  The second protruding portion 22b is a wall-shaped portion that is formed so as to radially protrude from a portion of the fixing ring main body portion 22a near the rear end of the outer peripheral surface and extends in the circumferential direction. A plurality of the second protrusions 22b are provided along the outer peripheral surface of the fixed ring main body 22a at predetermined intervals. The second protruding portion 22b is a component provided corresponding to the first protruding portion 21b of the fixed ring operating ring 21. Therefore, the second protrusions 22b are provided in the same number as the first protrusions 21b of the fixed ring operating ring 21. In this embodiment, an example in which six second protrusions 22b are provided is shown.

  The second protrusion 22b comes into contact with the first protrusion 21b of the fixed ring operation ring 21 in the direction along the optical axis O, so that the focus ring 12 (first operation ring) moves to the first movement position or It has a function of preventing movement to the second movement position in the direction along the optical axis O (details will be described later).

  The slide portion 22c is formed on the outer peripheral surface of the fixed ring body portion 22a of the fixed ring 22 (control ring), and when the focus ring 12 slides in the direction along the optical axis O, the first portion of the fixed ring operation ring 21 is moved. 1 is a sliding surface on which the protruding portion 21b slides.

  The passable region 22d is a space region for passing the first protruding portion 21b of the fixed ring operation ring 21 along the outer peripheral surface (slide portion 22c) of the fixed ring 22. The passable area 22d mainly refers to a space area between the adjacent second protruding portions 22b.

  The photo interrupter slit 22e is a wall-shaped portion formed on the inner peripheral surface of the fixing ring body 22a. The photo interrupter slit 22e acts on a photo interrupter (not shown) fixedly mounted on the intermediate ring 15 when the fixed ring 22 rotates in conjunction with the focus ring 12, so that the rotation position of the focus ring 12 is increased. It constitutes a part of a detection unit for detecting.

  The rotation interlocking mechanism of the fixed ring 22 and the focus ring 12 is not particularly shown, but an interlocking convex portion 22f (FIG. 4) provided on the outer peripheral edge of the fixed ring 22 so as to project outward in the circumferential direction. Is engaged with a fixed portion (not shown) provided on the inner peripheral surface of the focus ring 12, so that the fixed ring 22 is rotatable in association with the rotation of the focus ring 12.

  In the movement switching mechanism 20 configured as above, when the fixed ring operation ring 21 (second operation ring) is rotated to the first rotation position, the first protruding portion 21b moves to the fixed ring 22 (control ring). The second protrusion 22b and the second protrusion 22b face each other in the direction along the optical axis O, thereby preventing the fixed ring operating ring 21 (second operating ring) from moving in the direction along the optical axis O.

  Further, when the fixed ring operation ring 21 (second operation ring) is rotated to the second rotation position, the first protruding portion 21b becomes slidable on the slide portion 22c of the fixed ring 22 (control ring), and the fixed ring operation is performed. The ring 21 (second operation ring) is allowed to move in the direction along the optical axis O.

  The operation of the movement switching mechanism 20 in the lens barrel 1 of the present embodiment thus configured will be described below with reference to FIGS. 10 to 15. 10 to 15 are views for explaining the operation of the movement switching mechanism in the lens barrel of the present embodiment. Of these, FIGS. 10 and 11 show the first state of the movement switching mechanism. 12 and 13 show the second state of the movement switching mechanism. 14 and 15 show the third state of the movement switching mechanism. 10, FIG. 12, and FIG. 14 are enlarged cross-sectional views of the essential part showing the portion indicated by the reference sign [A] in FIG. Here, FIG. 10 corresponds to a cross section taken along the line [10]-[10] in FIG. 11. FIG. 12 corresponds to a cross section taken along the line [12]-[12] of FIG. FIG. 14 corresponds to a cross section taken along the line [14]-[14] of FIG. In addition, FIGS. 11, 13, and 15 are enlarged perspective views of a main part of the movement switching mechanism in each state in which a part of a main part is cut and enlarged. Note that FIGS. 11, 13, and 15 show only the constituent members (fixed ring operation ring and fixed ring) that constitute the movement switching mechanism.

  As described above, the movement switching mechanism 20 in the lens barrel 1 of the present embodiment is a mechanism unit that switches the operating state of the focus ring 12 (first operation ring). That is, the operating state of the focus ring 12 is switched by the movement switching mechanism 20 operating. In this case, the movement switching mechanism 20 can switch the focus ring 12 into the following three states.

  (1) A state in which the focus ring 12 is in the first movement position (front) and is movable in the direction along the optical axis O from the first movement position to the second movement position (rear). This state is referred to as the first state of the movement switching mechanism 20.

  In this first state, the focus ring 12 is rotatable about the optical axis O and is also movable in the direction along the optical axis O from the first moving position to the second moving position. Further, in the first state, the focus ring 12 is at the first movement position on the front side, the auto focus operation can be executed, and the manual focus operation may be performed depending on the setting of the image pickup apparatus (not shown). Execution is also possible.

  (2) The focus ring 12 is at the first movement position (front), and movement of the focus ring 12 from the first movement position to the second movement position (rear) in the direction along the optical axis O is blocked. Status. This state is referred to as the second state of the movement switching mechanism 20.

  In the second state, the focus ring 12 is rotatable about the optical axis O and is prevented from moving from the first moving position to the second moving position in the direction along the optical axis O. Further, in this second state, the focus ring 12 is in the first movement position on the front side, the auto focus operation can be executed, and the manual focus operation may be performed depending on the setting on the imaging device (not shown) side. Execution is possible as in the first state.

  (3) A state in which the focus ring 12 is at the second movement position (rear) and is movable in the direction along the optical axis O from the second movement position to the first movement position (front). This state is referred to as the third state of the movement switching mechanism 20.

  In the third state, the focus ring 12 is rotatable about the optical axis O and is movable in the direction along the optical axis O from the second moving position to the first moving position. Further, in the third state, the focus ring 12 is at the rearward second movement position, and only the manual focus operation can be executed regardless of the setting on the imaging device (not shown) side.

  As described above, in the present lens barrel 1, when the focus ring 12 is in the first moving position, the main lens barrel 1 mainly operates in the autofocus operation mode, and manual focus operation is possible depending on the setting. is there. On the other hand, when the focus ring 12 is at the second movement position, the operation control according to the manual focus operation is performed regardless of the setting of the imaging device (not shown) in which the lens barrel 1 is mounted.

  Here, the fixed ring operation ring 21 (second operation ring) of the movement switching mechanism 20 is configured to rotate and move within a predetermined range between the first rotation position and the second rotation position. In this case, in the following description, when the fixed ring operation ring 21 is arranged at the first rotation position, the focus ring 12 is prevented from sliding in the direction along the optical axis O (second state). Shall be. Further, when the fixed ring operation ring 21 is arranged in the second rotation position, the state becomes the state (first state or third state) in which the sliding movement of the focus ring 12 in the direction along the optical axis O is permitted. To do.

  First, in the first state shown in FIGS. 10 and 11, the focus ring 12 is in the first movement position (forward), and the fixed ring operation ring 21 of the movement switching mechanism 20 is in the second state. It is in the rotating position.

  In the first state, the fixed ring 22 of the movement switching mechanism 20 moves from the first movement position of the focus ring 12 to the second movement position in the direction of the arrow X1 shown in FIGS. Slide movement is allowed.

  That is, in this first state, as shown in FIG. 11, the first protruding portion 21b of the fixed ring operating ring 21 is arranged at a position facing the passable region 22d of the fixed ring 22 in the direction along the optical axis O. ing. Further, the second protruding portion 22b of the fixed ring 22 has a predetermined distance in the direction along the optical axis O with respect to a portion other than the first protruding portion 21b of the annular body portion 21a of the fixed ring operating ring 21 (FIG. 10, FIG. 11 (see reference numeral D). The fixed ring operating ring 21 and the fixed ring 22 are relatively rotatable about the optical axis O (see reference numeral R1 in FIG. 11). At this time, even if the fixed ring operation ring 21 is rotated with respect to the fixed ring 22, the above-mentioned predetermined distance D is provided between the fixed ring operation ring 21 and the fixed ring 22. Therefore, in this state, the fixed ring operation ring 21 and the fixed ring 22 are arranged so that the first protrusion 21b does not collide with the second protrusion 22b in the rotation direction.

  Since the fixed ring operating ring 21 and the fixed ring 22 are arranged in such a positional relationship, the user moves the focus ring 12 from the first moving position to the second moving position in the direction along the optical axis O (see FIG. 10, the fixed ring operation ring 21 moves in the same direction in conjunction with the sliding movement of the focus ring 12. As a result, the first protruding portion 21b slides along the slide portion 22c and is arranged in the passable region 22d. Then, a portion of the annular body portion 21 a other than the first protruding portion 21 b contacts the second protruding portion 22 b of the fixing ring 22. As a result, the focus ring 12 moves to the second movement position, and further movement in the optical axis O direction is restricted. The state at this time is the third state shown in FIGS. 14 and 15.

  Next, when the movement switching mechanism 20 is in the first state (FIGS. 10 and 11), the user rotationally operates the fixed ring operation ring 21 (second operation ring) with the operation button 23, and the second rotation position. When it is rotated from to the first rotation position, the movement switching mechanism 20 enters the second state shown in FIGS. 12 and 13.

  In this second state, the first projecting portion 21b of the fixed ring operating ring 21 (second operating ring) and the second projecting portion 22b of the fixed ring 22 (control ring) face each other in the direction along the optical axis O. They are in contact with each other (see reference numeral D1). As a result, the fixed ring operating ring 21 is prevented from moving in the direction along the optical axis O (the arrow X1 direction in FIGS. 12 and 13). Therefore, the sliding movement of the focus ring 12 from the first movement position to the second movement position in the direction along the optical axis O is also prevented. That is, in this second state (when the fixed ring operation ring 21 is at the first rotation position), the focus ring 12 is inadvertently prevented from sliding in the optical axis O direction.

  Next, when the movement switching mechanism 20 is in the second state (FIGS. 12 and 13), the user rotationally operates the fixed ring operation ring 21 (second operation ring) with the operation button 23 to perform the first rotation position. When it is rotated from the second rotation position to the second rotation position, the movement switching mechanism 20 returns to the first state shown in FIGS.

  In the first state, as described above, the first protruding portion 21b of the fixed ring operation ring 21 is arranged at a position facing the passable region 22d of the fixed ring 22. As a result, the fixed ring operation ring 21 is allowed to move in the direction along the optical axis O. Therefore, sliding movement of the focus ring 12 from the first movement position to the second movement position in the direction along the optical axis O is also allowed. That is, when in the first state, that is, when the focus ring 12 is in the first movement position and the fixed ring operation ring 21 is in the second rotation position, the focus ring 12 can freely move in the optical axis O direction. Slide movement is allowed.

  Next, when the movement switching mechanism 20 is in the first state (FIGS. 10 and 11), the user slides the focus ring 12 to move the focus ring 12 from the first movement position to the second movement position. The switching mechanism 20 is in the third state shown in FIGS. 14 and 15.

  In the third state, the focus ring 12 is in the second movement position (rearward), and the fixed ring operation ring 21 of the movement switching mechanism 20 is in the second rotation position. The first protruding portion 21b of the fixed ring operating ring 21 is arranged in the passable region 22d of the fixed ring 22, and the second protruding portion 22b of the fixed ring 22 is the ring body portion of the fixed ring operating ring 21. 21a (see reference numeral D2).

  Therefore, in the third state, the focus ring 12 of the movement switching mechanism 20 moves in the direction of the arrow X2 shown in FIGS. 14 and 15 in the direction along the optical axis O, that is, from the second movement position of the focus ring 12 to the first movement position. Slide movement is allowed. At the same time, the focus ring 12 in the second movement position is prevented from sliding in the direction along the optical axis O in the arrow X2 direction shown in FIGS. That is, the focus ring 12 does not move rearward of the second movement position.

  Further, in the third state, the focus ring 12 is rotatable about the optical axis O within a predetermined range, and only the manual focus operation can be executed. As described above, the fixed ring 22 rotates in the same direction as the focus ring 12 rotates. Then, as shown in FIG. 15, the second projecting portion 22b of the fixed ring 22 is engaged with the passable region 22d of the fixed ring 22 in the rotation direction around the optical axis O. Therefore, in this third state, when the focus ring 12 is rotated, the fixed ring 22 rotates in the same direction in conjunction with this, and the fixed ring operating ring 21 also rotates in the same direction in conjunction with this. To do.

  That is, in the third state, the movement switching mechanism 20 including the fixed ring 22, the fixed ring operation ring 21, and the operation button 23 is integrated with the focus ring 12 in conjunction with the rotation operation of the focus ring 12. Rotate in the direction. At this time, the fixed ring operating ring 21 and the fixed ring 22 rotate in conjunction with the focus ring 12 while maintaining the relative positional relationship.

  Next, when the movement switching mechanism 20 is in the third state (FIGS. 14 and 15), the user moves the focus ring 12 from the second movement position to the first movement position along the optical axis O (arrow X2). Direction), the first protrusion 21b of the fixed ring operating ring 21 separates from the passable region 22d of the fixed ring 22 and returns to the first state shown in FIGS.

  As described above, according to the above-described embodiment, the optical axis O is movable to the first movement position and the second movement position along the optical axis O, and is rotatably arranged around the optical axis O. The focus ring 12 that is a first operation ring that generates a driving force for moving the lens holding frame 45 in the optical axis O direction in accordance with a rotating operation around the optical axis O of the focus ring 12 (first operation ring). The focus ring 12 (first operation ring) moves to the first movement position or the second movement position together with the focus ring 12 (first operation ring) while the focus ring 12 (first operation ring) moves to the first movement position. The fixed ring operation ring 21 that is a second operation ring that can be rotated between the first rotation position and the second rotation position when moving, and the fixed ring operation ring 21 that is arranged at a position fixed with respect to the optical axis O. 21 (second operation ring) is the first rotation position When the fixed ring operation ring 21 (second operation ring) rotates to the second rotation position, the fixed ring operation ring 21 (second operation ring) is prevented from moving in the optical axis O direction. Is provided with a control ring 22 that allows the fixed ring operating ring 21 (second operating ring) to move in the optical axis O direction.

  With such a configuration, when the focus ring 12 that is the first operation ring is in the first movement position, the focus ring 12 can be moved only by rotating the fixed ring operation ring 21 that is the second operation ring within a predetermined range. It is possible to switch between blocking and allowing slide movement in the optical axis O direction. In that case, the fixed ring operating ring 21 and the fixed ring 22 are formed with sufficient strength, and the movement of the focus ring 12 can be reliably prevented.

Further, the fixed ring operation ring 21 (second operation ring) is provided with an operation button 23 which is a rotation operation section for allowing the operator to perform a rotation operation,
The focus ring 12 (first operation ring) is provided with an opening 12a rotatably arranged around the optical axis O to expose the operation button 23 (rotation operation part). Here, the operation button 23 (rotation operation part) is configured to be rotatable in the opening 12a.

  The lens barrel 1 further includes a zoom operation ring 18 which is a third operation ring for setting a function different from that of the focus ring 12 (first operation ring). 3 operation ring) is arranged such that one end in the optical axis O direction covers at least a part of the opening 12a provided in the focus ring 12 (first operation ring).

  With this configuration, when the focus ring 12 is in the second movement position, the fixed ring operation ring 21 is in a state in which the rotation operation cannot be performed, so that when the focus ring 12 is in the second movement position, the focus ring 12 is immediately focused. The ring 12 can be moved to the first movement position. Therefore, it is possible to easily perform the switching operation from the manual focus operation mode to the auto focus operation mode when using the image pickup apparatus equipped with the lens barrel 1.

  The present invention is not limited to the above-described embodiment, and it goes without saying that various modifications and applications can be implemented without departing from the gist of the invention. Further, the one embodiment includes inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent elements are deleted from all the constituent elements shown in the above-mentioned one embodiment, if the problem to be solved by the invention can be solved and the effect of the invention can be obtained, this constituent element is deleted. The configured configuration can be extracted as an invention. Furthermore, the constituent elements of different embodiments may be combined appropriately. This invention is not limited by its specific embodiments, except as limited by the appended claims.

1 ... Lens barrel 11 ... Index display frame 12 ... Focus ring 12a ... Aperture 13 ... Distance display ring 14 ... Sliding ring 15 ... Intermediate ring 16 ... Fixed cylinder 17 ... Ling ring 18 ...... Zoom operation ring 19 ...... Rear exterior cylinder 20 ...... Movement switching mechanism 21 ...... Fixed ring operation ring 21a ...... Ring body 21b ...... First protrusion 21c ...... Thrust regulation part 21d ...... Sliding Allowable area 21e ... Button placement hole 21f ... Button placement portion 22 ... Fixed ring 22a ... Fixed ring main body portion 22b Second protruding portion 22c .. Slide portion 22d .. Passable area 22e .. Photointerrupter slit 22f. ...... Interlocking convex portion 23 ...... Operation button 23a ...... Biasing member 26 ...... Lens mount rings 31, 32, 33, 34, 36 ...... Lens group 35 ...... Focus lens groups 41, 4 2, 43, 44, 45, 46 ... Lens holding frame

Claims (5)

It is movable along the optical axis to a first movement position and a second movement position and is rotatably arranged around the optical axis, and at least one of the movement operation in the optical axis direction and the rotation operation about the optical axis. A first operation ring that generates a driving force for moving the lens holding frame in the optical axis direction according to an operation;
In conjunction with the movement of the first operation ring in the optical axis direction, the first operation ring moves to the first movement position or the second movement position together with the first operation ring, and the first operation ring moves to the first movement position. A second operation ring that can be rotationally operated to a first rotation position and a second rotation position when positioned;
The second operation ring is arranged at a position fixed with respect to the optical axis and prevents the second operation ring from moving in the optical axis direction when the second operation ring rotates to the first rotation position. A control ring that allows the second operation ring to move in the optical axis direction when the operation ring rotates to the second rotation position;
A lens barrel comprising: The second operation ring and the control ring constitute a movement switching unit that switches whether or not the first operation ring can move in the optical axis direction,
The movement switching unit prevents movement of the second operation ring in the optical axis direction by contact between the second operation ring and the control ring in the optical axis direction,
The second operation ring and the control ring are configured to be relatively movable in the optical axis direction at a position where the movement of the second operation ring in the optical axis direction is not blocked. Item 1. The lens barrel according to item 1. The movement switching unit is
A first protrusion that protrudes from the second operation ring in the optical axis direction;
A second protrusion protruding radially from the control ring;
A slide portion formed on the control ring,
Including,
When the second operating ring rotates to the first rotation position, the first projecting portion opposes the second projecting portion of the control ring in the optical axis direction, so that the second operating ring causes the optical axis. And the second operating ring is allowed to move in the optical axis direction when the first protrusion is slidable on the slide part of the control ring. The lens barrel according to claim 2. The second operation ring is provided with a rotation operation section for allowing an operator to perform a rotation operation,
The first operation ring is provided with an opening that is rotatably arranged around the optical axis and exposes the rotation operation unit.
The lens barrel according to claim 1, wherein the rotation operating portion is rotatable within the opening. The lens barrel further includes a third operation ring for setting a function different from that of the first operation ring,
The third operation ring is arranged such that, when the first operation ring is in the second movement position, one end in the optical axis direction covers at least a part of the opening provided in the first operation ring. The lens barrel according to claim 1, wherein:

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