JP2010230753A - Lens barrel and imaging apparatus - Google Patents

Lens barrel and imaging apparatus Download PDF

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JP2010230753A
JP2010230753A JP2009075603A JP2009075603A JP2010230753A JP 2010230753 A JP2010230753 A JP 2010230753A JP 2009075603 A JP2009075603 A JP 2009075603A JP 2009075603 A JP2009075603 A JP 2009075603A JP 2010230753 A JP2010230753 A JP 2010230753A
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optical system
plate
lens barrel
members
cylinder
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Tokukatsu Konno
徳勝 今野
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Nikon Corp
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Nikon Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a lens barrel configured such that a user need not re-hold a lens hood from the lens barrel every time a lens barrier is opened/closed. <P>SOLUTION: The lens barrel having optical systems (L1, L2 and L10) includes: first members (5 and 102) supporting plate members (13a, 13b, 13c, 13d, 104a and 104b) movable between a first position where the plate member shields the optical system and a second position where the plate member projects to an object side of the optical system without shielding the optical system; and second members (11 and 100) supporting the optical systems to be movable in the optical axis direction and moving in the optical axis direction of the optical system relative to the first member. The second member is arranged relative to the plate member so that the plate member may move from the first position to the second position interlocked with movement of the optical system in the optical axis direction when the second member moves to the object side of the optical system relative to the first member. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、光学系を遮蔽する部材を備えたレンズ鏡筒及び撮像装置に関するものである。   The present invention relates to a lens barrel and an imaging apparatus that include a member that shields an optical system.

従来、レンズフードとレンズバリアとを備え、レンズフードの進退動作に連動してレンズバリアが開閉するフード連動バリアを備えたレンズ鏡筒が特許文献１に開示されている。   Conventionally, Patent Document 1 discloses a lens barrel that includes a lens hood and a lens barrier, and includes a hood interlocking barrier that opens and closes in conjunction with the forward and backward movement of the lens hood.

特開平３−１３９２３号公報JP-A-3-13923

しかし、特許文献１のレンズ鏡筒は、使用者がレンズバリアを開閉するためにレンズフードをレンズ鏡筒に対して進退させる必要があり、レンズバリアの開閉の度に使用者がレンズ鏡筒からレンズフードに持ち替えなければならないという問題があった。   However, in the lens barrel of Patent Document 1, it is necessary for the user to advance and retract the lens hood relative to the lens barrel in order to open and close the lens barrier. There was a problem that the lens hood had to be changed.

そこで本発明は、使用者がレンズバリアの開閉の度にレンズ鏡筒からレンズフードに持ち替えなくてもよいレンズ鏡筒及び撮像装置を提供することを目的とする。   SUMMARY An advantage of some aspects of the invention is that it provides a lens barrel and an imaging apparatus that do not require a user to switch from a lens barrel to a lens hood each time the lens barrier is opened and closed.

請求項１の発明は、光学系（Ｌ１，Ｌ２，Ｌ１０）を有するレンズ鏡筒において、前記光学系を遮蔽する第１の位置と前記光学系を遮蔽しないで前記光学系の物体側に突出する第２の位置とに移動可能な板状部材（１３ａ，１３ｂ，１３ｃ，１３ｄ，１０４ａ，１０４ｂ）を支持する第１部材（５，１０２）と、前記光学系を光軸方向に移動可能に支持するとともに、前記第１部材に対して前記光学系の光軸方向に移動する第２部材（１１，１００）とを有し、前記第２部材が前記第１部材に対して前記光学系の物体側に移動する際に、前記光学系の光軸方向への移動に連動して前記板状部材が前記第１の位置から前記第２の位置に移動するように、前記板状部材に対して前記第２部材を配置したことを特徴とするレンズ鏡筒である。   According to a first aspect of the present invention, in the lens barrel having the optical system (L1, L2, L10), the first position for shielding the optical system and the object side of the optical system project without being shielded. A first member (5, 102) for supporting plate-like members (13a, 13b, 13c, 13d, 104a, 104b) movable to the second position, and the optical system are supported so as to be movable in the optical axis direction. And a second member (11, 100) that moves in the optical axis direction of the optical system with respect to the first member, and the second member is an object of the optical system with respect to the first member. When moving to the side, with respect to the plate member, the plate member moves from the first position to the second position in conjunction with the movement of the optical system in the optical axis direction. A lens barrel in which the second member is arranged.

請求項２の発明は、請求項１に記載のレンズ鏡筒において、前記第２部材を前記光学系の光軸方向へ移動可能なカム（１０ｂ）を有し、前記カムは、前記第２部材を前記光学系の光軸方向に移動させる第1のカム部（１０ｃ）と、前記第２部材を前記光学系の光軸方向に対して静止させる第２のカム部（１０ｄ）とを有することを特徴とするレンズ鏡筒である。   According to a second aspect of the present invention, in the lens barrel according to the first aspect, the second member has a cam (10b) capable of moving in the optical axis direction of the optical system, and the cam is the second member. A first cam portion (10c) for moving the second member in the optical axis direction of the optical system, and a second cam portion (10d) for stopping the second member relative to the optical axis direction of the optical system. This is a lens barrel characterized by the following.

請求項３の発明は、請求項２に記載のレンズ鏡筒において、前記第1のカム部と前記第２のカム部とは連続して設けられていることを特徴とするレンズ鏡筒である。   A third aspect of the present invention is the lens barrel according to the second aspect, wherein the first cam portion and the second cam portion are provided continuously. .

請求項４の発明は、請求項２または３に記載のレンズ鏡筒において、前記第1のカム部は、前記第２のカム部に対して傾斜して設けられていることを特徴とするレンズ鏡筒。   According to a fourth aspect of the present invention, in the lens barrel according to the second or third aspect, the first cam portion is provided to be inclined with respect to the second cam portion. A lens barrel.

請求項５の発明は、請求項１から4のいずれか一項に記載のレンズ鏡筒において、前記板状部材は、第１及び第２の板状部材（１３ａ及び１３ｂ）を有し、前記第２部材は、前記第２部材が前記光学系の物体側に移動した際に前記光学系の物体側に突出して前記第１の板状部材に当接する第１の突出部（１１ａ）と、前記第２部材が前記光学系の物体側に移動した際に前記光学系の物体側に突出して前記第２の板状部材に当接する第２の突出部（１１ｂ）とを有し、前記第２部材が前記第1部材に対して前記光学系の像面側に移動する際に、前記第２の突出部の前記第２の板状部材への当接が解除されるよりも先に前記第１の突出部の前記第１の板状部材への当接が解除されるように、前記１の突出部よりも前記第２の突出部の突出量を大きく設けたことを特徴とするレンズ鏡筒である。   According to a fifth aspect of the present invention, in the lens barrel according to any one of the first to fourth aspects, the plate member includes first and second plate members (13a and 13b), The second member includes a first protrusion (11a) that protrudes toward the object side of the optical system and contacts the first plate member when the second member moves toward the object side of the optical system; A second protrusion (11b) that protrudes toward the object side of the optical system and contacts the second plate member when the second member moves toward the object side of the optical system; When the two members move to the image plane side of the optical system with respect to the first member, the contact of the second projecting portion with the second plate-shaped member is released before the second member is released. The protruding amount of the second protruding portion is larger than that of the first protruding portion so that the contact of the first protruding portion with the first plate-like member is released. A lens barrel, wherein the digit.

請求項６の発明は、請求項１から４のいずれか一項に記載のレンズ鏡筒において、前記板状部材は、第1及び第２の板状部材（１３ａ、１３ｂ）を有し、前記第1及び第２の板状部材が前記第２の位置に移動した状態において、前記第２の板状部材の前記光学系の物体側に突出する突出量を前記第１の板状部材の前記光学系の物体側に突出する突出量よりも小さく設けたことを特徴とするレンズ鏡筒である。   According to a sixth aspect of the present invention, in the lens barrel according to any one of the first to fourth aspects, the plate-like member includes first and second plate-like members (13a, 13b), In a state where the first and second plate-like members have moved to the second position, the amount of protrusion of the second plate-like member that protrudes toward the object side of the optical system is the amount of the first plate-like member. A lens barrel characterized in that the lens barrel is provided smaller than a protruding amount protruding toward the object side of the optical system.

請求項７の発明は、請求項１から4のいずれか一項に記載のレンズ鏡筒において、前記板状部材は、第1及び第２の板状部材（１４ａ及び１４ｂ）を有し、前記第1及び第２の板状部材が、前記第１の位置において互いの縁部を当接して前記光学系を遮蔽するように、前記第１の板状部材に対して前記第２の板状部材を配置したことを特徴とするレンズ鏡筒である。   The invention of claim 7 is the lens barrel according to any one of claims 1 to 4, wherein the plate member includes first and second plate members (14a and 14b), The first and second plate-like members are in contact with each other at the first position so as to shield the optical system so that the second plate-like member is against the first plate-like member. The lens barrel is characterized in that members are arranged.

請求項８の発明は、請求項１から７のいずれか一項に記載のレンズ鏡筒において、前記板状部材が磁性部（１５ａ，１５ｂ，１５ｃ）を有することを特徴とするレンズ鏡筒である。   The invention of claim 8 is the lens barrel according to any one of claims 1 to 7, wherein the plate-like member has a magnetic portion (15a, 15b, 15c). is there.

請求項９の発明は、請求項１から８のいずれか一項に記載のレンズ鏡筒において、前記板状部材を支持する枠部材（１６）を前記第１部材に対して着脱可能に設けたことを特徴とするレンズ鏡筒である。   According to a ninth aspect of the present invention, in the lens barrel according to any one of the first to eighth aspects, a frame member (16) that supports the plate-like member is provided detachably with respect to the first member. This is a lens barrel.

請求項１０の発明は、請求項１から９のいずれか一項に記載のレンズ鏡筒を備えた撮像装置である。   A tenth aspect of the present invention is an image pickup apparatus including the lens barrel according to any one of the first to ninth aspects.

なお、本発明をわかりやすく説明するために一実施例を表す図面の符号に対応づけて説明したが、本発明はこれに限定されるものではなく、後述の実施形態の構成を適宜改良してもよく、また、実施形態に開示された構成の少なくとも一部を他の構成物に代替させても良い。   In addition, in order to explain the present invention in an easy-to-understand manner, the description has been made in association with the reference numerals of the drawings representing one embodiment. However, the present invention is not limited to this, and the configuration of an embodiment described later is appropriately improved. In addition, at least a part of the configuration disclosed in the embodiment may be replaced with another component.

本発明の実施形態に係るレンズ鏡筒１をカメラボディ２に装着した状態において、板状部材１３ａ、１３ｃがレンズ鏡筒１の光学系Ｌを遮蔽する位置に移動した状態を示す断面図である。3 is a cross-sectional view showing a state in which the plate-like members 13a and 13c are moved to a position where the optical system L of the lens barrel 1 is shielded in a state where the lens barrel 1 according to the embodiment of the present invention is mounted on the camera body 2. FIG. . 本発明の実施形態に係るレンズ鏡筒１をカメラボディ２に装着した状態において、板状部材１３ａ、１３ｃがレンズ鏡筒１の光学系Ｌを遮蔽しない位置に移動した状態を示す断面図である。4 is a cross-sectional view showing a state in which the plate-like members 13a and 13c are moved to a position where the optical system L of the lens barrel 1 is not shielded in a state where the lens barrel 1 according to the embodiment of the present invention is mounted on the camera body 2. FIG. . 本発明の実施形態に係る直進筒１１を内周側から見た状態を示す展開図である。It is an expanded view which shows the state which looked at the linear cylinder 11 which concerns on embodiment of this invention from the inner peripheral side. 本発明の実施形態に係る板状部材１３ａ、１３ｂ、１３ｃ、１３ｄがレンズ鏡筒１の光学系Ｌを遮蔽した状態におけるレンズ鏡筒１の正面図である。FIG. 3 is a front view of the lens barrel 1 in a state where the plate-like members 13a, 13b, 13c, and 13d according to the embodiment of the present invention shield the optical system L of the lens barrel 1. 本発明の実施形態に係るカム筒６とズーム環１０とを内周側から見た状態を示す展開図である。図５（ａ）は、カム筒６を内周側から見た状態を示す展開図である。図５（ｂ）は、ズーム環１０を内周側から見た状態を示す展開図である。It is an expanded view which shows the state which looked at the cam cylinder 6 and zoom ring 10 which concern on embodiment of this invention from the inner peripheral side. FIG. 5A is a development view showing a state in which the cam cylinder 6 is viewed from the inner peripheral side. FIG. 5B is a development view showing a state in which the zoom ring 10 is viewed from the inner peripheral side. 本発明の実施形態に係る板状部材１３ａ、１３ｂ、１３ｃ、１３ｄの変形例であって、板状部材１４ａ、１４ｂ、１４ｃ、１４ｄがレンズ鏡筒１の光学系Ｌを遮蔽した状態におけるレンズ鏡筒１の正面図である。FIG. 4 is a modification of the plate-like members 13a, 13b, 13c, and 13d according to the embodiment of the present invention, and the lens mirror in a state where the plate-like members 14a, 14b, 14c, and 14d shield the optical system L of the lens barrel 1; 2 is a front view of a tube 1. FIG. 本発明の実施形態に係る磁性部１５ａ、１５ｂ、１５ｃを設けた板状部材１３ａ、１３ｂ、１３ｃ、１３ｄがレンズ鏡筒１の光学系Ｌを遮蔽した状態を図１のＡ方向から見た状態を示す図である。A state in which the plate-like members 13a, 13b, 13c, and 13d provided with the magnetic portions 15a, 15b, and 15c according to the embodiment of the present invention shield the optical system L of the lens barrel 1 from the direction A in FIG. FIG. 本発明の実施形態に係る板状部材１３ａ、１３ｂ、１３ｃ、１３ｄを、枠部材１６を介してレンズ鏡筒１に装着した状態を示す断面図である。FIG. 3 is a cross-sectional view showing a state in which plate-like members 13a, 13b, 13c, and 13d according to an embodiment of the present invention are attached to the lens barrel 1 via a frame member 16. 本発明の実施形態に係る板状部材１０４ａ、１０４ｂを備えたレンズ一体式カメラの断面の概略図である。図９（ａ）は、板状部材１０４ａ、１０４ｂがレンズ支持部材１００の光学系Ｌ１０を遮蔽する位置に移動した状態におけるレンズ一体式カメラの断面の概略図である。図９（ｂ）は、板状部材１０４ａ、１０４ｂがレンズ支持部材１００の光学系Ｌ１０を遮蔽しない位置に移動した状態におけるレンズ一体式カメラの断面の概略図である。It is the schematic of the cross section of the lens integrated camera provided with the plate-shaped members 104a and 104b which concern on embodiment of this invention. FIG. 9A is a schematic view of a cross section of the lens-integrated camera in a state where the plate-like members 104a and 104b are moved to a position where the optical system L10 of the lens support member 100 is shielded. FIG. 9B is a schematic cross-sectional view of the lens-integrated camera in a state where the plate-like members 104a and 104b are moved to a position where the optical system L10 of the lens support member 100 is not shielded.

図１は、本発明の実施形態に係るレンズ鏡筒１をカメラボディ２に装着した状態であって、後述する板状部材１３ａ、１３ｃが第１レンズ群Ｌ１と第２レンズ群Ｌ２とから構成される光学系Ｌを遮蔽する位置に移動した状態を示す断面図である。また、図２は、板状部材１３ａ、１３ｃがレンズ鏡筒１の光学系Ｌを遮蔽しない位置に移動した状態を示す断面図である。   FIG. 1 shows a state in which a lens barrel 1 according to an embodiment of the present invention is mounted on a camera body 2, and plate members 13a and 13c described later are composed of a first lens group L1 and a second lens group L2. It is sectional drawing which shows the state which moved to the position which shields the optical system L to be performed. FIG. 2 is a cross-sectional view showing a state where the plate-like members 13a and 13c have moved to a position where the optical system L of the lens barrel 1 is not shielded.

図１、図２で示すように、本発明の実施形態に係るレンズ鏡筒１は、カメラボディ２のボディマウント３に係合されるレンズマウント４を有し、このレンズマウント４と一体的に設けられた固定筒５を有している。この固定筒５には直進溝５ａ、５ｂが形成されている。また、固定筒５の内周面に接してカム筒６が配置されている。カム筒６はカム溝６ａとカム溝６ｂとを有しており、このカム溝６ａには、摺動筒７のフォロアピン７ａが係合し、カム溝６ｂには、第２レンズ群保持筒９のフォロアピン９ａが係合している。摺動筒７は、前述のフォロアピン７ａ、第１レンズ群Ｌ１を保持する第１レンズ群保持筒８に形成されたカム溝８ａに係合するフォロアピン７ｂ及び、前述のフォロアピン９ａを逃がすための逃げ溝７ｃを有しており、第１レンズ群Ｌ１及び第２レンズ群Ｌ２に機械的に接続されている。   As shown in FIGS. 1 and 2, a lens barrel 1 according to an embodiment of the present invention has a lens mount 4 that is engaged with a body mount 3 of a camera body 2, and is integrated with the lens mount 4. The fixed cylinder 5 is provided. The fixed cylinder 5 is formed with rectilinear grooves 5a and 5b. A cam cylinder 6 is disposed in contact with the inner peripheral surface of the fixed cylinder 5. The cam cylinder 6 has a cam groove 6a and a cam groove 6b. The follower pin 7a of the sliding cylinder 7 is engaged with the cam groove 6a, and the second lens group holding cylinder 9 is engaged with the cam groove 6b. The follower pin 9a is engaged. The sliding cylinder 7 has the follower pin 7a, the follower pin 7b that engages with the cam groove 8a formed in the first lens group holding cylinder 8 that holds the first lens group L1, and the escape for releasing the follower pin 9a. It has a groove 7c and is mechanically connected to the first lens group L1 and the second lens group L2.

また、第１レンズ群保持筒８が不図示のモーター等によってレンズ鏡筒１の光学系Ｌの光軸（Ｏ）を中心に回動されると、第１レンズ群Ｌ１は摺動筒７に対して光軸（Ｏ）方向に移動してフォーカシングを行う。また、第２レンズ群Ｌ２を保持する第２レンズ群保持筒９が摺動筒７の内周面に接して配置されており、第１レンズ群Ｌ１と第２レンズ群Ｌ２とをズーミングさせるためのズーム環１０が固定筒５の外周面に接して配置されている。   When the first lens group holding cylinder 8 is rotated around the optical axis (O) of the optical system L of the lens barrel 1 by a motor (not shown) or the like, the first lens group L1 is moved to the sliding cylinder 7. On the other hand, focusing is performed by moving in the direction of the optical axis (O). In addition, a second lens group holding cylinder 9 that holds the second lens group L2 is disposed in contact with the inner peripheral surface of the sliding cylinder 7 so as to zoom the first lens group L1 and the second lens group L2. The zoom ring 10 is arranged in contact with the outer peripheral surface of the fixed cylinder 5.

また、固定筒５の端部（図１の−Ｘ方向）には、ヒンジ部１２ａ、１２ｃを介して板状部材１３ａ、１３ｃが、枢支されている。なお、図１には図示されていないが、図３のレンズ鏡筒１の正面図で示されるように、固定筒５の端部には、ヒンジ部１２ｂ、１２ｄを介して板状部材１３ｂ、１３ｄも枢支されている。ズーム環１０は、カム筒６に係合する連結キー１０ａ及び、後述の直進筒１１のフォロアピン１１ｅに係合するカム溝１０ｂを有している。   In addition, plate-like members 13a and 13c are pivotally supported on the end portion (-X direction in FIG. 1) of the fixed cylinder 5 via hinge portions 12a and 12c. Although not shown in FIG. 1, as shown in the front view of the lens barrel 1 in FIG. 3, the end of the fixed barrel 5 is provided with a plate-like member 13 b, via hinges 12 b and 12 d. 13d is also pivoted. The zoom ring 10 has a connecting key 10a that engages with the cam cylinder 6 and a cam groove 10b that engages with a follower pin 11e of a straight cylinder 11 described later.

すなわち、ズーム環１０の操作により、カム筒６がズーム環１０と一体となって回動して第１レンズ群Ｌ１と第２レンズ群Ｌ２とを光軸方向に移動させるとともに、直進筒１１を光軸方向に移動させる。直進筒１１は、後述の突出部１１ａ、１１ｂ、１１ｃ、１１ｄを有し、レンズ鏡筒１の光学系Ｌの物体側（図１、図２の−Ｘ方向）に移動した際に、板状部材１３ａ、１３ｂ、１３ｃ、１３ｄを押圧することにより、板状部材１３ａ、１３ｂ、１３ｃ、１３ｄが光学系Ｌを遮蔽しない位置まで移動させる（図２参照）。また、直進筒１１がレンズ鏡筒１の像面側（図１の＋Ｘ方向）に移動した際に、突出部１１ａ、１１ｂ、１１ｃ、１１ｄの板状部材１３ａ、１３ｂ、１３ｃ、１３ｄへの押圧が解除されて、板状部材１３ａ、１３ｂ、１３ｃ、１３ｄが光学系Ｌを遮蔽する位置まで移動される（図１参照）。   That is, when the zoom ring 10 is operated, the cam cylinder 6 rotates integrally with the zoom ring 10 to move the first lens group L1 and the second lens group L2 in the optical axis direction, and the rectilinear cylinder 11 is moved. Move in the direction of the optical axis. The rectilinear cylinder 11 has protrusions 11a, 11b, 11c, and 11d, which will be described later, and is plate-shaped when moved to the object side (the -X direction in FIGS. 1 and 2) of the optical system L of the lens barrel 1. By pressing the members 13a, 13b, 13c, and 13d, the plate-like members 13a, 13b, 13c, and 13d are moved to positions that do not shield the optical system L (see FIG. 2). Further, when the rectilinear cylinder 11 moves to the image plane side (+ X direction in FIG. 1) of the lens barrel 1, the protrusions 11a, 11b, 11c, and 11d are pressed against the plate-like members 13a, 13b, 13c, and 13d. Is released, and the plate-like members 13a, 13b, 13c, and 13d are moved to positions where they shield the optical system L (see FIG. 1).

図３は、直進筒１１を内周側から見た状態を示す展開図である。直進筒１１は、前述のようにズーム環１０のカム溝１０ｂに係合するフォロアピン１１ｅを有するとともに、直進筒１１の端部（図３の−Ｘ方向）に、板状部材１３ａ、１３ｂ、１３ｃ、１３ｄを押圧するための突出部１１ａ、１１ｂ、１１ｃ、１１ｄを有している。突出部１１ａ、１１ｂ、１１ｃ、１１ｄは、光学系Ｌの物体側（図３の−Ｘ方向）に突出する突出量が、突出部１１ｄ、１１ｂ、１１ｃ、１１ａの順に大きく設けられている。これは、突出部１１ａ、１１ｂ、１１ｃ、１１ｄの板状部材１３ａ、１３ｂ、１３ｃ、１３ｄへの押圧を板状部材１３ａ、１３ｃ、１３ｂ、１３ｄの順に解除させることで板状部材１３ａ、１３ｂ、１３ｃ、１３ｄを板状部材１３ａ、１３ｃ、１３ｂ、１３ｄの順に閉じさせるためである。   FIG. 3 is a development view showing a state in which the straight cylinder 11 is viewed from the inner peripheral side. The rectilinear cylinder 11 has the follower pin 11e that engages with the cam groove 10b of the zoom ring 10 as described above, and plate-like members 13a, 13b, and 13c at the end of the rectilinear cylinder 11 (-X direction in FIG. 3). , 13d for projecting portions 11a, 11b, 11c, 11d. The protrusions 11a, 11b, 11c, and 11d are provided with a large protrusion amount in the order of the protrusions 11d, 11b, 11c, and 11a that protrude toward the object side of the optical system L (the -X direction in FIG. 3). This is because the plate-like members 13a, 13b, 13d, and 13d are released in the order of the plate-like members 13a, 13b, 13c, and 13d by releasing the pressing of the protrusions 11a, 11b, 11c, and 11d on the plate-like members 13a, 13b, 13c, and 13d. This is because 13c and 13d are closed in the order of the plate-like members 13a, 13c, 13b, and 13d.

直進筒１１が、ズーム環１０の回動に伴って光学系Ｌの物体側（図３の−Ｘ方向）に移動すると、突出部１１ａ、１１ｂ、１１ｃ、１１ｄは、突出部１１ｄ、１１ｂ、１１ｃ、１１ａの順（突出量の大きい順）に固定筒５から光学系Ｌの物体側に突出する。また、直進筒１１が、ズーム環１０の回動に伴って光学系Ｌの像面側（図３の＋Ｘ方向）に移動すると、突出部１１ａ、１１ｂ、１１ｃ、１１ｄは、突出部１１ａ、１１ｃ、１１ｂ、１１ｄの順（突出量の小さい順）に固定筒５に収容される。   When the rectilinear cylinder 11 moves to the object side (−X direction in FIG. 3) of the optical system L as the zoom ring 10 rotates, the projecting portions 11a, 11b, 11c, and 11d become the projecting portions 11d, 11b, and 11c. , 11a in the order (in order of increasing protrusion) from the fixed cylinder 5 to the object side of the optical system L. When the rectilinear cylinder 11 moves to the image plane side (+ X direction in FIG. 3) of the optical system L as the zoom ring 10 rotates, the projecting portions 11a, 11b, 11c, and 11d become the projecting portions 11a, 11c. , 11b, 11d (in order of increasing protrusion amount) in the fixed cylinder 5.

図４は、板状部材１３ａ、１３ｂ、１３ｃ、１３ｄがレンズ鏡筒１の光学系Ｌを遮蔽する位置に移動した状態におけるレンズ鏡筒１の正面図である。板状部材１３ａ、１３ｂ、１３ｃ、１３ｄは、固定筒５の端部にヒンジ部１２ａ、１２ｂ、１２ｃ、１２ｄを介して枢支されており、ヒンジ部１２ａ、１２ｂ、１２ｃ、１２ｄに設けられた不図示のバネ等によってレンズ鏡筒１の光学系Ｌを遮蔽する位置に移動する方向に付勢されている。   FIG. 4 is a front view of the lens barrel 1 in a state where the plate-like members 13a, 13b, 13c, and 13d are moved to positions where the optical system L of the lens barrel 1 is shielded. The plate-like members 13a, 13b, 13c, and 13d are pivotally supported on the end portion of the fixed cylinder 5 via hinge portions 12a, 12b, 12c, and 12d, and are provided on the hinge portions 12a, 12b, 12c, and 12d. The lens barrel 1 is biased in a direction to move to a position that shields the optical system L of the lens barrel 1 by a spring (not shown).

板状部材１３ａ、１３ｂ、１３ｃ、１３ｄがレンズ鏡筒１の光学系Ｌを遮蔽する位置に移動した状態において、直進筒１１が光学系Ｌの物体側に移動して突出部１１ａ、１１ｂ、１１ｃ、１１ｄが光学系Ｌの物体側に固定筒５から突出すると、板状部材１３ａは突出部１１ａに、板状部材１３ｂは突出部１１ｂに、板状部材１３ｃは突出部１１ｃに、板状部材１３ｄは突出部１１ｄに押圧されて、板状部材１３ａ、１３ｂ、１３ｃ、１３ｄがレンズ鏡筒１の光学系Ｌを遮蔽する位置から遮蔽しない位置に移動していく。このとき、突出部１１ａ、１１ｂ、１１ｃ、１１ｄが突出部１１ｄ、１１ｂ、１１ｃ、１１ａの順（突出量の大きい順）に固定筒５から突出するので、板状部材１３ａ、１３ｂ、１３ｃ、１３ｄは板状部材１３ｄ、１３ｂ、１３ｃ、１３ａの順に突出部１１ａ、１１ｂ、１１ｃ、１１ｄに押圧されていく。   In a state where the plate-like members 13a, 13b, 13c, and 13d are moved to positions where the optical system L of the lens barrel 1 is shielded, the rectilinear cylinder 11 moves to the object side of the optical system L and the protruding portions 11a, 11b, and 11c. , 11d protrudes from the fixed cylinder 5 to the object side of the optical system L, the plate-like member 13a becomes the protrusion 11a, the plate-like member 13b becomes the protrusion 11b, the plate-like member 13c becomes the protrusion 11c, and the plate-like member. 13d is pressed by the protruding portion 11d, and the plate-like members 13a, 13b, 13c, and 13d move from a position where the optical system L of the lens barrel 1 is shielded to a position where it is not shielded. At this time, since the projecting portions 11a, 11b, 11c, and 11d project from the fixed cylinder 5 in the order of the projecting portions 11d, 11b, 11c, and 11a (in descending order of projecting amount), the plate-like members 13a, 13b, 13c, and 13d Are pressed by the protrusions 11a, 11b, 11c, and 11d in the order of the plate-like members 13d, 13b, 13c, and 13a.

また、板状部材１３ａ、１３ｂ、１３ｃ、１３ｄがレンズ鏡筒１の光学系Ｌを遮蔽しない位置に移動して開いた状態において、直進筒１１が光学系Ｌの像面側に移動して突出部１１ａ、１１ｂ、１１ｃ、１１ｄが固定筒５に収容されると、板状部材１３ａ、１３ｂ、１３ｃ、１３ｄへの突出部１１ａ、１１ｂ、１１ｃ、１１ｄの押圧が解除されて、板状部材１３ａ、１３ｂ、１３ｃ、１３ｄがレンズ鏡筒１の光学系Ｌを遮蔽しない位置から遮蔽する位置に移動する。   In addition, when the plate-like members 13a, 13b, 13c, and 13d are moved and opened to positions that do not shield the optical system L of the lens barrel 1, the rectilinear cylinder 11 moves to the image plane side of the optical system L and protrudes. When the portions 11a, 11b, 11c, and 11d are accommodated in the fixed cylinder 5, the projections 11a, 11b, 11c, and 11d on the plate-like members 13a, 13b, 13c, and 13d are released, and the plate-like member 13a is released. , 13b, 13c, and 13d move from a position where the optical system L of the lens barrel 1 is not shielded to a position where it is shielded.

このとき、突出部１１ａ、１１ｂ、１１ｃ、１１ｄが突出部１１ａ、１１ｃ、１１ｂ、１１ｄの順（突出量が小さい順）に固定筒５に収容されるので、板状部材１３ａ、１３ｂ、１３ｃ、１３ｄへの突出部１１ａ、１１ｂ、１１ｃ、１１ｄの押圧が板状部材１３ａ、１３ｃ、１３ｂ、１３ｄの順に解除され、板状部材１３ａ、１３ｂ、１３ｃ、１３ｄは板状部材１３ａ、１３ｃ、１３ｂ、１３ｄの順にレンズ鏡筒１の光学系Ｌを遮蔽しない位置から遮蔽する位置に移動する。   At this time, since the protrusions 11a, 11b, 11c, and 11d are accommodated in the fixed cylinder 5 in the order of the protrusions 11a, 11c, 11b, and 11d (in the order of the protrusion amount being small), the plate-like members 13a, 13b, 13c, The pressing of the protrusions 11a, 11b, 11c, 11d to 13d is released in the order of the plate-like members 13a, 13c, 13b, 13d, and the plate-like members 13a, 13b, 13c, 13d are plate-like members 13a, 13c, 13b, In order of 13d, the optical system L of the lens barrel 1 is moved from a position not shielded to a position shielded.

なお、板状部材１３ａ、１３ｂ、１３ｃ、１３ｄがレンズ鏡筒１の光学系Ｌを遮蔽しない位置に移動した状態において、板状部材１３ａ、１３ｃの光学系Ｌの物体側に突出する突出量よりも板状部材１３ｂ、１３ｄの光学系Ｌの物体側に突出する突出量が小さいので、板状部材１３ｂ、１３ｄによって撮影画角がけられるのを防止している。   In the state in which the plate-like members 13a, 13b, 13c, and 13d are moved to positions that do not shield the optical system L of the lens barrel 1, the amount of protrusion of the plate-like members 13a and 13c that protrudes toward the object side In addition, since the projecting amount of the plate-like members 13b and 13d projecting toward the object side of the optical system L is small, the plate-like members 13b and 13d are prevented from taking a shooting angle of view.

図５は、カム筒６とズーム環１０とを内周側から見た状態を示す展開図である。図５（ａ）は、カム筒６を内周側から見た状態を示す展開図である。また、図５（ｂ）は、ズーム環１０を内周側から見た状態を示す展開図である。   FIG. 5 is a development view showing a state where the cam barrel 6 and the zoom ring 10 are viewed from the inner peripheral side. FIG. 5A is a development view showing a state in which the cam cylinder 6 is viewed from the inner peripheral side. FIG. 5B is a development view showing a state in which the zoom ring 10 is viewed from the inner peripheral side.

図５（ａ）で示すように、カム筒６のカム溝６ａは、カム筒６の周方向（図５のａ−ｂ方向）に対して角度(で傾斜して設けられている。カム筒６のカム溝６ａには、摺動筒７のフォロアピン７ａが係合している。板状部材１３ａ、１３ｂ、１３ｃ、１３ｄがレンズ鏡筒１の光学系Ｌを遮蔽する位置に移動した状態において、摺動筒７のフォロアピン７ａは、カム筒６のカム溝６ａを位置Ｐまで移動している。この状態において、使用者によるズーム環１０の操作によってカム筒６が光学系Ｌの像面側から見て右回り（図５のａ方向）に回動されると、摺動筒７のフォロアピン７ａはカム筒６のカム溝６ａを位置Ｐから位置Ｑを経て位置Ｒまで移動する。   As shown in FIG. 5A, the cam groove 6a of the cam cylinder 6 is provided so as to be inclined at an angle (to the circumferential direction of the cam cylinder 6 (direction ab in FIG. 5). The follower pin 7a of the sliding cylinder 7 is engaged with the cam groove 6a 6. The plate-like members 13a, 13b, 13c, and 13d are moved to a position where the optical system L of the lens barrel 1 is shielded. The follower pin 7a of the sliding cylinder 7 moves to the position P in the cam groove 6a of the cam cylinder 6. In this state, the cam cylinder 6 is moved to the image plane side of the optical system L by the operation of the zoom ring 10 by the user. , The follower pin 7a of the sliding cylinder 7 moves from the position P through the position Q to the position R through the cam groove 6a of the cam cylinder 6.

このとき、摺動筒７及び第１レンズ群保持筒８は、摺動筒７のフォロアピン７ａの移動に伴って、レンズ鏡筒１の光学系Ｌの物体側に移動する。また、摺動筒７のフォロアピン７ａがカム筒６のカム溝６ａを位置Ｒまで移動した状態において、使用者によるズーム環１０の操作によってカム筒６が光学系Ｌの像面側から見て左回り（図５のｂ方向）に回動されると、摺動筒７のフォロアピン７ａは位置Ｒから位置Ｑを経て位置Ｐまで移動する。このとき、摺動筒７及び第１レンズ群保持筒８は、摺動筒７のフォロアピン７ａの移動に伴って、レンズ鏡筒１の光学系Ｌの像面側に移動する。   At this time, the sliding cylinder 7 and the first lens group holding cylinder 8 move to the object side of the optical system L of the lens barrel 1 as the follower pin 7a of the sliding cylinder 7 moves. Further, when the follower pin 7a of the sliding cylinder 7 has moved to the position R in the cam groove 6a of the cam cylinder 6, the cam cylinder 6 is left when viewed from the image plane side of the optical system L by the operation of the zoom ring 10 by the user. When rotated around (b direction in FIG. 5), the follower pin 7a of the sliding cylinder 7 moves from the position R to the position P through the position Q. At this time, the sliding cylinder 7 and the first lens group holding cylinder 8 move to the image plane side of the optical system L of the lens barrel 1 as the follower pin 7a of the sliding cylinder 7 moves.

図５（ｂ）のズーム環１０の内周面の展開図が示すように、ズーム環１０のカム溝１０ｂは、ズーム環１０の周方向（図５のａ−ｂ方向）に対して角度(（＞(）で傾斜して設けられた第１のカム部１０ｃ（図５のＳ−Ｔ間）と、ズーム環１０の周方向（図５のａ−ｂ方向）に沿って設けられた第２のカム部１０ｄ（図５のＴ−Ｕ間）とを有している。ズーム環１０のカム溝１０ｂには直進筒１１のフォロアピン１１ｅが係合している。直進筒１１は、直進筒１１のフォロアピン１１ｅがズーム環１０の第１のカム部１０ｃを移動するのに伴って、レンズ鏡筒１の光学系Ｌの光軸方向に移動し、直進筒１１のフォロアピン１１ｅがズーム環１０の第２のカム部１０ｄを移動するのに伴って、レンズ鏡筒１の光学系Ｌの光軸方向の位置を一定に維持する。   As shown in the development of the inner peripheral surface of the zoom ring 10 in FIG. 5B, the cam groove 10b of the zoom ring 10 has an angle (with respect to the circumferential direction of the zoom ring 10 (a-b direction in FIG. 5)). (First cam portion 10c provided with an inclination at (>) (between ST in FIG. 5) and a first cam portion provided along the circumferential direction of the zoom ring 10 (a-b direction in FIG. 5). The cam groove 10b of the zoom ring 10 is engaged with the follower pin 11e of the rectilinear cylinder 11. The rectilinear cylinder 11 is a rectilinear cylinder. As the 11 follower pins 11e move along the first cam portion 10c of the zoom ring 10, the 11 follower pins 11e move in the optical axis direction of the optical system L of the lens barrel 1, and the follower pin 11e of the rectilinear barrel 11 moves toward the zoom ring 10. As the second cam portion 10d is moved, the position of the optical system L of the lens barrel 1 in the optical axis direction is kept constant. To.

板状部材１３ａ、１３ｂ、１３ｃ、１３ｄがレンズ鏡筒１の光学系Ｌを遮蔽する位置に移動した状態において、直進筒１１のフォロアピン１１ｅは、ズーム環１０のカム溝１０ｂを位置Ｓまで移動している。この状態において、使用者によってズーム環１０がレンズ鏡筒１の光学系Ｌの像面側から見て右回り（図５のａ方向）に回動されると、直進筒１１のフォロアピン１１ｅは、ズーム環１０のカム溝１０ｂを位置Ｓから位置Ｔを経て位置Ｕまで移動する。このとき、直進筒１１は、直進筒１１のフォロアピン１１ｅがズーム環１０のカム溝１０ｂを位置Ｓから位置Ｔまで移動するのに伴って、レンズ鏡筒１の光学系Ｌの物体側に移動し、直進筒１１のフォロアピン１１ｅがズーム環１０のカム溝１０ｂを位置Ｔから位置Ｕまで移動するのに伴って、レンズ鏡筒１の光学系Ｌの光軸方向の位置を一定に維持する。   In a state where the plate-like members 13a, 13b, 13c, and 13d are moved to a position where the optical system L of the lens barrel 1 is shielded, the follower pin 11e of the rectilinear barrel 11 moves through the cam groove 10b of the zoom ring 10 to the position S. ing. In this state, when the zoom ring 10 is rotated clockwise (when viewed from the image plane side of the optical system L of the lens barrel 1) by the user, the follower pin 11e of the rectilinear cylinder 11 is The cam groove 10b of the zoom ring 10 is moved from the position S through the position T to the position U. At this time, the rectilinear cylinder 11 moves to the object side of the optical system L of the lens barrel 1 as the follower pin 11e of the rectilinear cylinder 11 moves from the position S to the position T in the cam groove 10b of the zoom ring 10. As the follower pin 11e of the rectilinear cylinder 11 moves from the position T to the position U in the cam groove 10b of the zoom ring 10, the position of the optical system L of the lens barrel 1 in the optical axis direction is kept constant.

また、直進筒１１のフォロアピン１１ｅがズーム環１０のカム溝１０ｂを位置Ｕまで移動した状態において、使用者によってズーム環１０がレンズ鏡筒１の光学系Ｌの像面側から見て左回り（図５のｂ方向）に回動されると、直進筒１１のフォロアピン１１ｅはズーム環１０のカム溝１０ｂを位置Ｕから位置Ｔを経て位置Ｓまで移動する。このとき、直進筒１１は、直進筒１１のフォロアピン１１ｅがズーム環１０のカム溝１０ｂを位置Ｕから位置Ｔまで移動するのに伴って、レンズ鏡筒１の光学系Ｌの光軸方向の位置を一定に維持し、直進筒１１のフォロアピン１１ｅがズーム環１０のカム溝１０ｂを位置Ｔから位置Ｓまで移動するのに伴って、レンズ鏡筒１の光学系Ｌの像面側に移動する。   Further, in a state where the follower pin 11e of the rectilinear cylinder 11 has moved to the position U in the cam groove 10b of the zoom ring 10, the zoom ring 10 is counterclockwise as viewed from the image plane side of the optical system L of the lens barrel 1 ( When the follower pin 11e of the rectilinear cylinder 11 is rotated in the cam groove 10b of the zoom ring 10 from the position U to the position S through the position T, the rotation is performed in the direction b in FIG. At this time, as the follower pin 11e of the rectilinear cylinder 11 moves from the position U to the position T in the cam groove 10b of the zoom ring 10, the rectilinear cylinder 11 is positioned in the optical axis direction of the optical system L of the lens barrel 1. Is maintained constant, and the follower pin 11e of the rectilinear cylinder 11 moves to the image plane side of the optical system L of the lens barrel 1 as the cam groove 10b of the zoom ring 10 moves from the position T to the position S.

次に、板状部材１３ａ、１３ｃの開閉動作について説明する。図１及び図２で図示されていない板状部材１３ｂ、１３ｄの開閉動作は、板状部材１３ａ、１３ｃの開閉動作とほぼ同じなので説明を省略する。   Next, the opening / closing operation of the plate-like members 13a and 13c will be described. Since the opening / closing operations of the plate-like members 13b, 13d not shown in FIGS. 1 and 2 are substantially the same as the opening / closing operations of the plate-like members 13a, 13c, description thereof will be omitted.

図１の板状部材１３ａ、１３ｃがレンズ鏡筒１の光学系Ｌを遮蔽する位置に移動した状態において、使用者によってズーム環１０がレンズ鏡筒１の光学系Ｌの像面側から見て右回りに光軸（Ｏ）を中心に回動されると、カム筒６に係合するズーム環１０の連結キー１０ａを介してカム筒６もズーム環１０と一体となって回動される。   In a state where the plate-like members 13a and 13c of FIG. 1 are moved to a position where the optical system L of the lens barrel 1 is shielded, the zoom ring 10 is viewed from the image plane side of the optical system L of the lens barrel 1 by the user. When rotated clockwise about the optical axis (O), the cam cylinder 6 is also rotated integrally with the zoom ring 10 via the connecting key 10a of the zoom ring 10 engaged with the cam cylinder 6. .

カム筒６の回動に伴って、摺動筒７に設けられたフォロアピン７ａが固定筒５の直進溝５ａとカム筒６のカム溝６ａとに沿ってレンズ鏡筒１の光学系の物体側（図１の−Ｘ方向）に移動し、それに伴って、摺動筒７及び摺動筒７に係合する第１レンズ群保持筒８がレンズ鏡筒１の光学系Ｌの物体側（図１の−Ｘ方向）に移動する。この間、摺動筒７のフォロアピン７ａは、図５（ａ）で示されるカム筒６の内周面の展開図において、カム筒６のカム溝６ａを位置Ｐから位置Ｑまで移動する。   As the cam barrel 6 rotates, the follower pin 7a provided on the sliding barrel 7 moves along the rectilinear groove 5a of the fixed barrel 5 and the cam groove 6a of the cam barrel 6 on the object side of the optical system of the lens barrel 1. Along with this, the first lens group holding cylinder 8 engaged with the sliding cylinder 7 and the sliding cylinder 7 is moved to the object side of the optical system L of the lens barrel 1 (see FIG. 1). 1 -X direction). During this time, the follower pin 7a of the sliding cylinder 7 moves the cam groove 6a of the cam cylinder 6 from the position P to the position Q in the development of the inner peripheral surface of the cam cylinder 6 shown in FIG.

一方、ズーム環１０の回動に伴って、直進筒１１のフォロアピン１１ｅは、固定筒５の直進溝５ｂとズーム環１０のカム溝１０ｂとに沿ってレンズ鏡筒１の光学系Ｌの物体側（図１の−Ｘ方向）に移動し、それに伴って、直進筒１１はレンズ鏡筒１の光学系Ｌの物体側（図１の−Ｘ方向）に移動する。このとき、直進筒１１に設けられた突出部１１ａ、１１ｃが１１ｃ、１１ａの順（突出量の大きい順）に固定筒５から光学系Ｌの物体側（図１の−Ｘ方向）に突出する。その結果、板状部材１３ｃが直進筒１１の突出部１１ｃに押圧された後に、板状部材１３ａが直進筒１１の突出部１１ａに押圧されて、板状部材１３ａ、１３ｃは１３ｃ、１３ａの順にレンズ鏡筒１の光学系Ｌを遮蔽する位置から遮蔽しない位置に移動する(図２参照)。この間、直進筒１１のフォロアピン１１ｅは、図５（ｂ）で示されるズーム環１０の内周面の展開図において、ズーム環１０に設けられたカム溝１０ｂの第１のカム部１０ｃを位置Ｓから位置Ｔまで移動する。   On the other hand, as the zoom ring 10 rotates, the follower pin 11e of the rectilinear cylinder 11 moves along the rectilinear groove 5b of the fixed cylinder 5 and the cam groove 10b of the zoom ring 10 on the object side of the optical system L of the lens barrel 1. (The -X direction in FIG. 1), and accordingly, the rectilinear barrel 11 moves to the object side (the −X direction in FIG. 1) of the optical system L of the lens barrel 1. At this time, the projecting portions 11a and 11c provided on the rectilinear cylinder 11 project from the fixed cylinder 5 to the object side of the optical system L (in the −X direction in FIG. 1) in the order of 11c and 11a (in descending order of projecting amount). . As a result, after the plate-like member 13c is pressed by the protruding portion 11c of the rectilinear cylinder 11, the plate-like member 13a is pressed by the protruding portion 11a of the rectilinear cylinder 11, and the plate-like members 13a and 13c are in the order of 13c and 13a. The optical system L of the lens barrel 1 is moved from a position where it is shielded to a position where it is not shielded (see FIG. 2). During this time, the follower pin 11e of the rectilinear cylinder 11 positions the first cam portion 10c of the cam groove 10b provided in the zoom ring 10 at the position S in the development of the inner peripheral surface of the zoom ring 10 shown in FIG. To position T.

なお、ズーム環１０の第１のカム部１０ｃがズーム環１０の周方向（図５のａ−ｂ方向）となす角度(が、カム筒６のカム溝６ａがカム筒６の周方向（図５のａ−ｂ方向）となす角度(よりも大きいことにより、直進筒１１はズーム環１０の単位回転量あたりの光軸方向への移動量が摺動筒７よりも大きい。したがって、直進筒１１は、摺動筒７及び摺動筒７が係合する第１レンズ群保持筒８よりも先に光学系Ｌの物体側（図１の−Ｘ方向）に移動し、第１レンズ群保持筒８が板状部材１３ａ、１３ｃに当接する前に直進筒１１の突出部１１ａ、１１ｃが板状部材１３ａ、１３ｃを押し開くことができる。   The angle formed by the first cam portion 10c of the zoom ring 10 and the circumferential direction of the zoom ring 10 (the ab direction in FIG. 5) is determined by the cam groove 6a of the cam cylinder 6 in the circumferential direction of the cam cylinder 6 (FIG. 5 is larger than the angle (the ab direction of 5), and the linear movement cylinder 11 has a larger movement amount in the optical axis direction per unit rotation amount of the zoom ring 10 than the sliding cylinder 7. Therefore, the linear movement cylinder 11 11 moves to the object side (−X direction in FIG. 1) of the optical system L before the first lens group holding cylinder 8 with which the sliding cylinder 7 and the sliding cylinder 7 engage, and holds the first lens group. Before the tube 8 contacts the plate-like members 13a and 13c, the projecting portions 11a and 11c of the rectilinear tube 11 can push open the plate-like members 13a and 13c.

使用者によってズーム環１０がさらに回動されると、ズーム環１０と一体となって回動するカム筒６の回動に伴って摺動筒７のフォロアピン７ａは固定筒５の直進溝５ａとカム筒６のカム溝６ａとに沿ってレンズ鏡筒１の光学系Ｌの物体側（図２の−Ｘ方向）にさらに移動し、摺動筒７及び第１レンズ群保持筒８が光学系Ｌの物体側（図２の−Ｘ方向）にさらに移動する。この間、摺動筒７のフォロアピン７ａは、図５（ａ）で示されるカム筒６の内周面の展開図において、カム筒６のカム溝６ａを位置Ｑから位置Ｒまで移動する。   When the zoom ring 10 is further rotated by the user, the follower pin 7a of the sliding cylinder 7 and the rectilinear groove 5a of the fixed cylinder 5 are rotated with the rotation of the cam cylinder 6 that rotates integrally with the zoom ring 10. The lens barrel 1 further moves along the cam groove 6a of the lens barrel 1 toward the object side (the -X direction in FIG. 2) of the optical system L of the lens barrel 1, and the sliding barrel 7 and the first lens group holding barrel 8 are moved to the optical system. It further moves to the object side of L (-X direction in FIG. 2). During this time, the follower pin 7a of the sliding cylinder 7 moves the cam groove 6a of the cam cylinder 6 from the position Q to the position R in the developed view of the inner peripheral surface of the cam cylinder 6 shown in FIG.

一方、ズーム環１０の回動に伴って、直進筒１１のフォロアピン１１ｅは、レンズ鏡筒１の光学系Ｌの光軸（Ｏ）方向（図５のＸ軸方向）の位置を一定に維持した状態でズーム環１０のカム溝１０ｂに沿って移動し、それに伴って、直進筒１１は直進筒１１の突出部１１ａ、１１ｃを固定筒５から光学系Ｌの物体側に突出した状態で光軸（Ｏ）方向（図２のＸ軸方向）の位置を一定に維持する。その結果、板状部材１３ａ、１３ｃがレンズ鏡筒１の光学系Ｌを遮蔽しない位置に移動した状態が維持される。この間、直進筒１１のフォロアピン１１ｅは、図５（ｂ）で示されるズーム環１０の展開図において、ズーム環１０に設けられたカム溝１０ｂの第２のカム部１０ｄを位置Ｔから位置Ｕまで移動する。   On the other hand, as the zoom ring 10 rotates, the follower pin 11e of the rectilinear barrel 11 maintains a constant position in the optical axis (O) direction (X-axis direction in FIG. 5) of the optical system L of the lens barrel 1. In this state, it moves along the cam groove 10b of the zoom ring 10, and accordingly, the rectilinear cylinder 11 projects the projections 11a and 11c of the rectilinear cylinder 11 from the fixed cylinder 5 to the object side of the optical system L in the optical axis. The position in the (O) direction (X-axis direction in FIG. 2) is kept constant. As a result, the state where the plate-like members 13a and 13c are moved to a position where the optical system L of the lens barrel 1 is not shielded is maintained. During this time, the follower pin 11e of the rectilinear cylinder 11 moves the second cam portion 10d of the cam groove 10b provided in the zoom ring 10 from the position T to the position U in the development view of the zoom ring 10 shown in FIG. Moving.

また、図２の板状部材１３ａ、１３ｃがレンズ鏡筒１の光学系Ｌを遮蔽しない位置に移動した状態において、使用者がズーム環１０をレンズ鏡筒１の光学系Ｌの像面側から見て左回りに光軸（Ｏ）を中心に回動させると、カム筒６に係合するズーム環１０の連結キー１０ａを介してカム筒６もズーム環１０と一体となって光学系Ｌの像面側から見て左回りに回動される。   2 moves to a position where the optical system L of the lens barrel 1 is not shielded, the user moves the zoom ring 10 from the image plane side of the optical system L of the lens barrel 1. When the lens is rotated counterclockwise around the optical axis (O), the cam cylinder 6 is also integrated with the zoom ring 10 via the connecting key 10a of the zoom ring 10 engaged with the cam cylinder 6. Is rotated counterclockwise as viewed from the image plane side.

カム筒６の回動に伴って、摺動筒７に設けられたフォロアピン７ａは固定筒５の直進溝５ａとカム筒６のカム溝６ａとに沿ってレンズ鏡筒１の像面側（図２の＋Ｘ方向）に移動し、それに伴って、摺動筒７及び第１レンズ群保持筒８は、レンズ鏡筒１の光学系Ｌの像面側（図２の＋Ｘ方向）に移動する。この間、摺動筒７のフォロアピン７ａは、図５（ａ）で示されるカム筒６の内周面の展開図において、カム筒６のカム溝６ａを位置Ｒから位置Ｑに移動する。   As the cam cylinder 6 rotates, the follower pin 7a provided on the sliding cylinder 7 moves along the rectilinear groove 5a of the fixed cylinder 5 and the cam groove 6a of the cam cylinder 6 on the image plane side of the lens barrel 1 (see FIG. 2 and the first lens group holding cylinder 8 move to the image plane side of the optical system L of the lens barrel 1 (+ X direction in FIG. 2). During this time, the follower pin 7a of the sliding cylinder 7 moves the cam groove 6a of the cam cylinder 6 from the position R to the position Q in the developed view of the inner peripheral surface of the cam cylinder 6 shown in FIG.

一方、ズーム環１０の回動に伴って、直進筒１１に設けられたフォロアピン１１ｅは、レンズ鏡筒１の光学系Ｌの光軸（Ｏ）方向（図５のＸ軸方向）の位置を一定に維持した状態でズーム環１０のカム溝１０ｂに沿って移動し、それに伴って、直進筒１１は直進筒１１の突出部１１ａ、１１ｃを固定筒５から光学系Ｌの物体側に突出した状態で光軸（Ｏ）方向（図２のＸ軸方向）の位置を一定に維持する。その結果、板状部材１３ａ、１３ｃがレンズ鏡筒１の光学系Ｌを遮蔽しない位置に移動した状態が維持される。この間、直進筒１１のフォロアピン１１ｅは、図５（ｂ）で示されるズーム環１０の内周面の展開図において、ズーム環１０に設けられたカム溝１０ｂの第２のカム部１０ｄを位置Ｕから位置Ｔまで移動する。   On the other hand, as the zoom ring 10 rotates, the follower pin 11e provided on the rectilinear barrel 11 keeps the position of the optical system L of the lens barrel 1 in the optical axis (O) direction (X-axis direction in FIG. 5) constant. In this state, it moves along the cam groove 10b of the zoom ring 10, and accordingly, the rectilinear cylinder 11 projects the protruding portions 11a and 11c of the rectilinear cylinder 11 from the fixed cylinder 5 to the object side of the optical system L. Thus, the position in the optical axis (O) direction (X-axis direction in FIG. 2) is kept constant. As a result, the state where the plate-like members 13a and 13c are moved to a position where the optical system L of the lens barrel 1 is not shielded is maintained. During this time, the follower pin 11e of the straight cylinder 11 moves the second cam portion 10d of the cam groove 10b provided in the zoom ring 10 to the position U in the development of the inner peripheral surface of the zoom ring 10 shown in FIG. To position T.

使用者によってズーム環１０がさらに回動されると、ズーム環１０と一体となって回動するカム筒６の回動に伴って、摺動筒７のフォロアピン７ａはカム筒６のカム溝６ａに沿ってレンズ鏡筒１の像面側（図２の＋Ｘ方向）に移動し、摺動筒７及び第１レンズ群保持筒８が光学系Ｌの像面側（図２の＋Ｘ方向）にさらに移動する。この間、摺動筒７のフォロアピン７ａは、図５（ａ）で示されるカム筒６の内周面の展開図において、カム筒６のカム溝６ａを位置Ｑから位置Ｐまで移動する。   When the zoom ring 10 is further rotated by the user, the follower pin 7a of the sliding cylinder 7 is moved along the cam groove 6a of the cam cylinder 6 with the rotation of the cam cylinder 6 that rotates integrally with the zoom ring 10. And the lens barrel 1 moves to the image plane side (+ X direction in FIG. 2), and the sliding cylinder 7 and the first lens group holding cylinder 8 move to the image plane side of the optical system L (+ X direction in FIG. 2). Move further. During this time, the follower pin 7a of the sliding cylinder 7 moves the cam groove 6a of the cam cylinder 6 from the position Q to the position P in the developed view of the inner peripheral surface of the cam cylinder 6 shown in FIG.

一方、直進筒１１のフォロアピン１１ｅは、固定筒５の直進溝５ｂとズーム環１０のカム溝１０ｂとに沿ってレンズ鏡筒１の像面側（図２の＋Ｘ方向）に移動し、それに伴って、直進筒１１は、光学系Ｌの像面側（図２の＋Ｘ方向）に移動する。このとき、直進筒１１の端部に設けられた突出部１１ａ、１１ｃは、１１ａ、１１ｃの順（突出量の小さい順）に固定筒５に収容される。   On the other hand, the follower pin 11e of the rectilinear cylinder 11 moves along the rectilinear groove 5b of the fixed cylinder 5 and the cam groove 10b of the zoom ring 10 toward the image plane side (+ X direction in FIG. 2) of the lens barrel 1, and accordingly. Thus, the rectilinear cylinder 11 moves to the image plane side (+ X direction in FIG. 2) of the optical system L. At this time, the protrusions 11a and 11c provided at the end of the straight cylinder 11 are accommodated in the fixed cylinder 5 in the order of 11a and 11c (in the order of the small protrusion amount).

その結果、板状部材１３ａへの突出部１１ａの押圧が解除された後、板状部材１３ｃへの突出部１１ｃの押圧が解除され、板状部材１３ａ、１３ｃが１３ａ、１３ｃの順にレンズ鏡筒１の光学系Ｌを遮蔽する位置に移動して、図１の状態となる。この間、直進筒１１のフォロアピン１１ｅは、図５（ｂ）で示されるズーム環１０の内周面の展開図において、ズーム環１０に設けられたカム溝１０ｂの第１のカム部１０ｃを位置Ｔから位置Ｓまで移動する。   As a result, after the pressing of the protruding portion 11a to the plate-like member 13a is released, the pressing of the protruding portion 11c to the plate-like member 13c is released, and the plate-like members 13a and 13c are in the order of 13a and 13c. It moves to the position which shields the one optical system L, and will be in the state of FIG. During this time, the follower pin 11e of the rectilinear cylinder 11 positions the first cam portion 10c of the cam groove 10b provided in the zoom ring 10 at the position T in the development of the inner peripheral surface of the zoom ring 10 shown in FIG. To position S.

なお、図５で示すカム筒６とズーム環１０の内周面の展開図において、摺動筒７のフォロアピン７ａがカム筒６に設けられたカム溝６ａのＱ−Ｒ間を移動する間は、直進筒１１のフォロアピン１１ｅがズーム環１０に設けられたカム溝１０ｂのＴ−Ｕ間（第２のカム部１０ｄ）を移動することで直進筒１１の突出部１１ａ、１１ｂ、１１ｃ、１１ｄによって板状部材１３ａ、１３ｂ、１３ｃ、１３ｄがレンズ鏡筒１の光学系Ｌを遮蔽しない位置に維持されるので、カム筒６に設けられたカム溝６ａのＱ−Ｒ間における第1レンズ群保持筒８の移動範囲を通常撮影に使用するズーミング範囲とすることが望ましい。   In the development of the cam cylinder 6 and the inner peripheral surface of the zoom ring 10 shown in FIG. 5, while the follower pin 7a of the sliding cylinder 7 moves between the Q and R of the cam groove 6a provided in the cam cylinder 6. By moving the follower pin 11e of the rectilinear cylinder 11 between TU (second cam portion 10d) of the cam groove 10b provided in the zoom ring 10, the projecting portions 11a, 11b, 11c, and 11d of the rectilinear cylinder 11 are moved. Since the plate-like members 13a, 13b, 13c, and 13d are maintained at positions that do not block the optical system L of the lens barrel 1, the first lens group is held between the Q and R of the cam groove 6a provided in the cam barrel 6. It is desirable that the moving range of the tube 8 be a zooming range used for normal photographing.

また、摺動筒７のフォロアピン７ａがカム筒６に設けられたカム溝６ａのＰ−Ｑ間を移動する間は、直進筒１１のフォロアピン１１ｅがズーム環１０に設けられたカム溝１０ｂのＳ−Ｔ間（第１のカム部１０ｄ）を移動することで直進筒１１がレンズ鏡筒１の光学系Ｌの光軸方向（図５のＸ軸方向）に移動して板状部材１３ａ、１３ｂ、１３ｃ、１３ｄが開閉するので、板状部材１３ａ、１３ｂ、１３ｃ、１３ｄの開閉状態によっては撮影画角がけられる可能性がある。したがって、カム筒６に設けられたカム溝６ａのＰ−Ｑ間における第1レンズ群保持筒８の移動範囲を第１レンズ群保持筒８の固定筒５への収容範囲とし、撮影に使用しないことが望ましい。   Further, while the follower pin 7 a of the sliding cylinder 7 moves between PQ of the cam groove 6 a provided in the cam cylinder 6, the S of the cam groove 10 b provided in the zoom ring 10 is provided with the follower pin 11 e of the linear cylinder 11. -T (first cam portion 10d) moves the linearly-moving cylinder 11 in the optical axis direction (X-axis direction in FIG. 5) of the optical system L of the lens barrel 1, thereby moving the plate-like members 13a and 13b. , 13c, 13d open and close, and there is a possibility that the shooting angle of view may be shifted depending on the open / closed state of the plate members 13a, 13b, 13c, 13d. Therefore, the moving range of the first lens group holding cylinder 8 between PQ of the cam groove 6a provided in the cam cylinder 6 is set as the accommodation range of the first lens group holding cylinder 8 in the fixed cylinder 5 and is not used for photographing. It is desirable.

以上説明した実施形態に限定されることなく、種々の変形や変更が可能であって、それらも本発明の均等の範囲内である。   The present invention is not limited to the embodiment described above, and various modifications and changes are possible, and these are also within the equivalent scope of the present invention.

本実施形態において、図４で示すように、板状部材１３ａ、１３ｂ、１３ｃ、１３ｄがレンズ鏡筒１の光学系Ｌを遮蔽する位置に移動した状態において、板状部材１３ａの前方（図１の−Ｘ方向）に板状部材１３ｃが重なり、更に板状部材１３ｃの前方（図１の−Ｘ方向）に板状部材１３ｂ、１３ｄが重なる例を説明したが、図６に示すように、板状部材１４ａ、１４ｂ、１４ｃ、１４ｄがレンズ鏡筒１の光学系Ｌの光軸（Ｏ）方向に重なることなく、互いの縁部を当接させてレンズ鏡筒１の光学系Ｌを遮蔽する状態を形成するようにしてもよい。   In this embodiment, as shown in FIG. 4, the plate-like members 13a, 13b, 13c, and 13d are moved in front of the plate-like member 13a (see FIG. The -X direction) of the plate-like member 13c overlaps, and the plate-like members 13b, 13d overlap the front of the plate-like member 13c (the -X direction of FIG. 1), but as shown in FIG. The plate-like members 14 a, 14 b, 14 c, and 14 d do not overlap in the optical axis (O) direction of the optical system L of the lens barrel 1, but contact each other's edges to shield the optical system L of the lens barrel 1. You may make it form the state to do.

この場合、突出部１１ａ、１１ｂ、１１ｃ、１１ｄのレンズ鏡筒１の光学系Ｌの物体側（図１の−Ｘ方向）への突出量を全て同じにして、直進筒１１がレンズ鏡筒１の光学系Ｌの像面側（図１の＋Ｘ方向）に移動する際に、図６に示す板状部材１４ａ、１４ｂ、１４ｃ、１４ｄが同時にレンズ鏡筒１の光学系Ｌを遮蔽しない位置から遮蔽する位置に移動するようにしてもよい。また、板状部材１４ａ、１４ｂ、１４ｃ、１４ｄがレンズ鏡筒１の光学系Ｌを遮蔽しない位置に移動した状態において、板状部材１４ａ、１４ｂ、１４ｃ、１４ｄがレンズ鏡筒１の光学系Ｌの物体側に突出する突出量は、板状部材１４ｂ、１４ｄを板状部材１４ａ、１４ｃに対して小さく設けることで撮影画角のケラレを防止するようにしてもよい。   In this case, the projecting portions 11 a, 11 b, 11 c, and 11 d have the same projection amount toward the object side (the −X direction in FIG. 1) of the optical system L of the lens barrel 1 so that the rectilinear barrel 11 is the lens barrel 1. 6 from the position where the plate-like members 14a, 14b, 14c, and 14d shown in FIG. 6 do not simultaneously block the optical system L of the lens barrel 1 when moving toward the image plane side (the + X direction in FIG. 1). You may make it move to the position to shield. Further, in a state where the plate-like members 14a, 14b, 14c, and 14d are moved to positions that do not shield the optical system L of the lens barrel 1, the plate-like members 14a, 14b, 14c, and 14d are the optical system L of the lens barrel 1. The amount of protrusion that protrudes toward the object side may be such that the plate-like members 14b and 14d are provided smaller than the plate-like members 14a and 14c to prevent vignetting of the shooting angle of view.

また、本実施形態において、板状部材１３ａ、１３ｂ、１３ｃ、１３ｄがレンズ鏡筒１の光学系Ｌを遮蔽する位置に移動した状態が、ヒンジ部１２ａ、１２ｂ、１２ｃ、１２ｄの不図示のバネ等の付勢力によって維持される例を説明したが、磁性体の磁力によってその状態が維持されるようにしてもよい。例えば、図７に示すように、板状部材１３ａ、１３ｂ、１３ｃ、１３ｄがレンズ鏡筒１の光学系Ｌを遮蔽する位置に移動した状態で、レンズ鏡筒１の光学系Ｌの光軸方向（図７の−Ｘ方向）に重なる板状部材１３ｂ、１３ｃ、１３ｄの接する位置に磁性部１５ａ、１５ｂ、１５ｃを設けることで、磁性部１５ｂと磁性部１５ａ、１５ｃとの間に働く磁力によって板状部材１３ａ、１３ｂ、１３ｃ、１３ｄがレンズ鏡筒１の光学系Ｌを遮蔽する位置に移動した状態を維持するようにしてもよい。   In the present embodiment, the state in which the plate-like members 13a, 13b, 13c, and 13d are moved to positions that shield the optical system L of the lens barrel 1 is springs (not shown) of the hinge portions 12a, 12b, 12c, and 12d. Although the example maintained by the urging force such as the above has been described, the state may be maintained by the magnetic force of the magnetic body. For example, as shown in FIG. 7, the optical axis direction of the optical system L of the lens barrel 1 in a state where the plate-like members 13 a, 13 b, 13 c, and 13 d have moved to positions that shield the optical system L of the lens barrel 1. By providing the magnetic portions 15a, 15b, and 15c at the positions where the plate-like members 13b, 13c, and 13d that overlap in the (X direction in FIG. 7) contact, the magnetic force acting between the magnetic portion 15b and the magnetic portions 15a and 15c The plate-like members 13a, 13b, 13c, and 13d may be maintained in a state where they are moved to positions that shield the optical system L of the lens barrel 1.

また、本実施形態において、板状部材１３ａ、１３ｂ、１３ｃ、１３ｄがヒンジ部１２ａ、１２ｂ、１２ｃ、１２ｄを介して固定筒５に設けられる例を示したが、図８に示すように、固定筒５に対して着脱可能な枠部材１６を介して固定筒５に設けてもよい。この場合、固定筒５の端部をズーム環１０に対してレンズ鏡筒１の光学系Ｌの物体側（図８の−Ｘ方向）に突出する形状とし、その突出部５ｃに板状部材１３ａ、１３ｂ、１３ｃ、１３ｄを枢支する枠部材１６を装着するようにしてもよい。なお、枠部材１６の突出部５ｃへの装着方法は、図８に示すような嵌め込み式のほか、ねじ込み式、バヨネット式等でもよい。   Moreover, in this embodiment, although the plate-shaped members 13a, 13b, 13c, and 13d showed the example provided in the fixed cylinder 5 via hinge part 12a, 12b, 12c, 12d, as shown in FIG. You may provide in the fixed cylinder 5 via the frame member 16 which can be attached or detached with respect to the cylinder 5. FIG. In this case, the end of the fixed cylinder 5 has a shape protruding toward the object side (the −X direction in FIG. 8) of the optical system L of the lens barrel 1 with respect to the zoom ring 10, and a plate-like member 13 a is formed on the protrusion 5 c. , 13b, 13c, and 13d may be mounted with a frame member 16. In addition, the mounting method to the protrusion part 5c of the frame member 16 may be a screwing type, a bayonet type, etc. other than the fitting type as shown in FIG.

以上説明した実施形態によれば、レンズ鏡筒１は、光学系Ｌを遮蔽する位置と光学系Ｌを遮蔽しないで光学系Ｌの物体側に突出する位置とに移動可能な板状部材１３ａ、１３ｂ、１３ｃ、１３ｄを支持する固定筒５と、光学系Ｌを光軸方向に移動可能に支持するとともに、固定筒５に対して光学系Ｌの光軸方向に移動する直進筒１１とを有し、直進筒１１が固定筒５に対して光学系Ｌの物体側に移動する際に、光学系Ｌの光軸方向への移動に連動して板状部材１３ａ、１３ｂ、１３ｃ、１３ｄが光学系Ｌを遮蔽する位置から光学系Ｌを遮蔽しないで光学系Ｌの物体側に突出する位置に移動するように、板状部材１３ａ、１３ｂ、１３ｃ、１３ｄに対して直進筒１１を配置したので、使用者が板状部材１３ａ、１３ｂ、１３ｃ、１３ｄの開閉の度にズーム環１０から板状部材１３ａ、１３ｂ、１３ｃ、１３ｄに持ち替えなくてもよいという効果が得られる。   According to the embodiment described above, the lens barrel 1 can be moved to a position where the optical system L is shielded, and a position where the lens barrel 1 protrudes toward the object side of the optical system L without shielding the optical system L, The fixed cylinder 5 that supports 13b, 13c, and 13d and the rectilinear cylinder 11 that supports the optical system L to be movable in the optical axis direction and moves in the optical axis direction of the optical system L with respect to the fixed cylinder 5 are provided. When the rectilinear cylinder 11 moves toward the object side of the optical system L with respect to the fixed cylinder 5, the plate members 13a, 13b, 13c, and 13d are optically linked with the movement of the optical system L in the optical axis direction. Since the rectilinear cylinder 11 is arranged with respect to the plate-like members 13a, 13b, 13c, and 13d so as to move from a position that shields the system L to a position that protrudes toward the object side of the optical system L without shielding the optical system L. The user can open and close the plate-like members 13a, 13b, 13c, 13d. Plate member 13a from the zoom ring 10, 13b, 13c, the effect that it is not necessary dimensional worlds to 13d obtained.

また、以上説明した実施形態において、レンズ交換式の一眼レフカメラに装着されるレンズ鏡筒について説明したが、この形態に限定されることなく、例えば、図９に示すような電動ズームタイプのレンズ一体式カメラ（撮像装置）を実施形態とすることもできる。   In the embodiment described above, the lens barrel attached to the interchangeable lens single-lens reflex camera has been described. However, the present invention is not limited to this embodiment. For example, an electric zoom type lens as shown in FIG. An integrated camera (imaging device) can also be used as an embodiment.

図９は、後述の板状部材１０４ａ、１０４ｂを備えたレンズ一体式カメラ（撮像装置）の断面の概略図である。図９（ａ）は、板状部材１０４ａ、１０４ｂがレンズ支持部材１００の光学系Ｌ１０を遮蔽する位置に移動した状態を示す図であり、図９（ｂ）は、板状部材１０４ａ、１０４ｂがレンズ支持部材１００の光学系Ｌ１０を遮蔽しない位置に移動した状態を示す図である。   FIG. 9 is a schematic view of a cross section of a lens-integrated camera (imaging device) including plate members 104a and 104b described later. FIG. 9A is a diagram illustrating a state in which the plate-like members 104a and 104b are moved to positions where the optical system L10 of the lens support member 100 is shielded, and FIG. 9B is a diagram in which the plate-like members 104a and 104b are moved. It is a figure which shows the state which moved to the position which does not shield the optical system L10 of the lens support member.

図９のレンズ一体式カメラにおいて、レンズ支持部材１００は光学系Ｌ１０を光軸（Ｏ）方向（図９のＸ軸方向）に移動可能に支持している。使用者が、カメラボディ１０１に設けられた不図示の操作部材を操作することにより、レンズ支持部材１００は枠部材１０２を介して光軸（Ｏ）方向（図９のＸ軸方向）に光学系Ｌ１０とともに電動で移動可能となっている。   In the lens-integrated camera of FIG. 9, the lens support member 100 supports the optical system L10 so as to be movable in the optical axis (O) direction (X-axis direction of FIG. 9). When the user operates an operation member (not shown) provided on the camera body 101, the lens support member 100 is optically moved in the optical axis (O) direction (X-axis direction in FIG. 9) via the frame member 102. It can be moved electrically with L10.

枠部材１０２には、ヒンジ部１０３ａ、１０３ｂを介して板状部材１０４ａ、１０４ｂが枢支されており、レンズ支持部材１００の光学系Ｌ１０を遮蔽する位置と遮蔽しない位置とに移動可能となっている。すなわち、図９で示されるレンズ一体式カメラのレンズ鏡筒は、レンズ支持部材１００と、枠部材１０２と、板状部材１０４ａ、１０４ｂとで構成される。   Plate members 104a and 104b are pivotally supported on the frame member 102 via hinges 103a and 103b, and can move between a position where the optical system L10 of the lens support member 100 is shielded and a position where it is not shielded. Yes. That is, the lens barrel of the lens-integrated camera shown in FIG. 9 includes the lens support member 100, the frame member 102, and the plate-like members 104a and 104b.

図９（ａ）で示すように、板状部材１０４ａ、１０４ｂがレンズ支持部材１００の光学系Ｌ１０を遮蔽する位置に移動した状態では、板状部材１０４ａ、１０４ｂはレンズキャップとして機能する。また、図９（ｂ）で示すように、板状部材１０４ａ、１０４ｂがレンズ支持部材１００の光学系Ｌ１０を遮蔽しない位置に移動した状態では、板状部材１０４ａ、１０４ｂはレンズフードとして機能する。レンズ支持部材１００が光学系Ｌ１０とともに、光学系Ｌ１０の像面側（図９の＋Ｘ方向）に移動してカメラボディ１０１に収容された状態では、板状部材１０４ａ、１０４ｂはヒンジ部１０３ａ、１０３ｂに設けられた不図示のバネ等の付勢力によってレンズ支持部材１００の光学系Ｌ１０を遮蔽する位置に移動している（図９（ａ）参照）。   As shown in FIG. 9A, in the state where the plate-like members 104a and 104b are moved to a position where the optical system L10 of the lens support member 100 is shielded, the plate-like members 104a and 104b function as lens caps. 9B, the plate members 104a and 104b function as lens hoods when the plate members 104a and 104b are moved to positions that do not shield the optical system L10 of the lens support member 100. As shown in FIG. When the lens support member 100 is moved together with the optical system L10 to the image plane side (+ X direction in FIG. 9) of the optical system L10 and accommodated in the camera body 101, the plate-like members 104a and 104b are hinged portions 103a and 103b. The lens support member 100 is moved to a position for shielding the optical system L10 by an urging force such as a spring (not shown) provided on the lens support (see FIG. 9A).

この状態において、レンズ支持部材１００が光学系Ｌ１０とともに光学系Ｌ１０の物体側（図９の−Ｘ方向）に移動すると、板状部材１０４ａ、１０４ｂはレンズ支持部材１００に押圧されてヒンジ部１０３ａ、１０３ｂに設けられた不図示のバネ等の付勢力に抗しながらレンズ支持部材１００の光学系Ｌ１０を遮蔽する位置から遮蔽しない位置へ移動する(図９（ｂ）参照)。   In this state, when the lens support member 100 moves together with the optical system L10 to the object side of the optical system L10 (the −X direction in FIG. 9), the plate-like members 104a and 104b are pressed by the lens support member 100 to be hinged portions 103a, 103a, The lens support member 100 moves from a position where the optical system L10 of the lens support member 100 is shielded to a position where it is not shielded against an urging force of a spring (not shown) provided at 103b (see FIG. 9B).

また、板状部材１０４ａ、１０４ｂがレンズ支持部材１００の光学系Ｌ１０を遮蔽しない位置に移動した図９（ｂ）の状態において、レンズ支持部材１００が光学系Ｌ１０とともに光学系Ｌ１０の像面側（図９の＋Ｘ方向）に移動してカメラボディ１０１に収容されると、板状部材１０４ａ、１０４ｂへのレンズ支持部材１００の押圧が解除される。その結果、板状部材１０４ａ、１０４ｂは、ヒンジ部１０３ａ、１０３ｂの不図示のバネ等の付勢力によってレンズ支持部材１００の光学系Ｌ１０を遮蔽しない位置から遮蔽する位置に移動する(図９（ａ）参照)。   Further, in the state of FIG. 9B in which the plate-like members 104a and 104b are moved to a position where the optical system L10 of the lens support member 100 is not shielded, the lens support member 100 together with the optical system L10 is on the image plane side of the optical system L10 ( When moved in the + X direction in FIG. 9 and accommodated in the camera body 101, the pressing of the lens support member 100 on the plate-like members 104a and 104b is released. As a result, the plate-like members 104a and 104b move from a position where the optical system L10 of the lens support member 100 is not shielded by a biasing force such as a spring (not shown) of the hinge portions 103a and 103b to a position where the optical system L10 is shielded (FIG. 9A). )reference).

以上説明したレンズ一体式カメラ（撮像装置）の実施形態によれば、カメラボディ１０１は、光学系Ｌ１０を遮蔽する位置と光学系Ｌ１０を遮蔽しないで光学系Ｌ１０の物体側に突出する位置とに移動可能な板状部材１０４ａ，１０４ｂを支持する枠部材１０２と、光学系Ｌ１０を光軸方向に移動可能に支持するとともに、枠部材１０２に対して光学系Ｌ１０の光軸方向に移動するレンズ支持部材１００とを有し、レンズ支持部材１００が枠部材１０２に対して光学系Ｌ１０の物体側に移動する際に、光学系Ｌ１０の光軸方向への移動に連動して板状部材１０４ａ、１０４ｂが光学系Ｌ１０を遮蔽する位置から光学系Ｌ１０を遮蔽しないで光学系Ｌ１０の物体側に突出する位置に移動するように、板状部材１０４ａ、１０４ｂに対してレンズ支持部材１００を配置したレンズ鏡筒を備えたので、使用者が板状部材１０４ａ、１０４ｂの開閉の度に、レンズ支持部材１００を光軸方向に移動させるための操作部材を操作する位置から板状部材１０４ａ、１０４ｂに持ち替えなくてもよいという効果が得られる。   According to the embodiment of the lens-integrated camera (imaging device) described above, the camera body 101 is located at the position where the optical system L10 is shielded and the position where the optical system L10 projects toward the object side without shielding the optical system L10. A frame member 102 that supports the movable plate-like members 104a and 104b, and a lens support that supports the optical system L10 so as to be movable in the optical axis direction and that moves relative to the frame member 102 in the optical axis direction of the optical system L10. When the lens support member 100 moves toward the object side of the optical system L10 with respect to the frame member 102, the plate-like members 104a and 104b are interlocked with the movement of the optical system L10 in the optical axis direction. Lens to the plate-like members 104a and 104b so that the lens moves from the position shielding the optical system L10 to the position protruding to the object side of the optical system L10 without shielding the optical system L10. Since the lens barrel provided with the holding member 100 is provided, the plate is moved from the position where the user operates the operation member for moving the lens support member 100 in the optical axis direction each time the plate members 104a and 104b are opened and closed. The effect that it is not necessary to change to the shaped members 104a and 104b is obtained.

１ レンズ鏡筒
５ 固定筒
６ カム筒
７ 摺動筒
８ 第１レンズ群保持筒
９ 第２レンズ群保持筒
１０ ズーム環
１１ 直進筒
１１ａ、１１ｂ、１１ｃ、１１ｄ 突出部
１３ａ、１３ｂ、１３ｃ、１３ｄ 板状部材
１５ａ、１５ｂ、１５ｃ 磁性部
１６ 枠部材 DESCRIPTION OF SYMBOLS 1 Lens barrel 5 Fixed cylinder 6 Cam cylinder 7 Sliding cylinder 8 1st lens group holding cylinder 9 2nd lens group holding cylinder 10 Zoom ring 11 Straight advance cylinder 11a, 11b, 11c, 11d Protrusion part 13a, 13b, 13c, 13d Plate members 15a, 15b, 15c Magnetic part 16 Frame member

Claims (10)

光学系を有するレンズ鏡筒において、
前記光学系を遮蔽する第１の位置と前記光学系を遮蔽しないで前記光学系の物体側に突出する第２の位置とに移動可能な板状部材を支持する第１部材と、
前記光学系を光軸方向に移動可能に支持するとともに、前記第１部材に対して前記光学系の光軸方向に移動する第２部材とを有し、
前記第２部材が前記第１部材に対して前記光学系の物体側に移動する際に、前記光学系の光軸方向への移動に連動して前記板状部材が前記第１の位置から前記第２の位置に移動するように、前記板状部材に対して前記第２部材を配置したことを特徴とするレンズ鏡筒。 In a lens barrel having an optical system,
A first member that supports a plate-like member that is movable to a first position that shields the optical system and a second position that projects to the object side of the optical system without shielding the optical system;
A second member that supports the optical system movably in the optical axis direction and moves in the optical axis direction of the optical system with respect to the first member;
When the second member moves to the object side of the optical system with respect to the first member, the plate-like member moves from the first position in conjunction with the movement of the optical system in the optical axis direction. A lens barrel, wherein the second member is arranged with respect to the plate member so as to move to a second position. 請求項１に記載のレンズ鏡筒において、
前記第２部材を前記光学系の光軸方向へ移動可能なカムを有し、
前記カムは、前記第２部材を前記光学系の光軸方向に移動させる第1のカム部と、前記第２部材を前記光学系の光軸方向に対して静止させる第２のカム部とを有することを特徴とするレンズ鏡筒。 The lens barrel according to claim 1,
A cam capable of moving the second member in the optical axis direction of the optical system;
The cam includes a first cam portion that moves the second member in the optical axis direction of the optical system, and a second cam portion that stops the second member relative to the optical axis direction of the optical system. A lens barrel characterized by having a lens barrel. 請求項２に記載のレンズ鏡筒において、
前記第1のカム部と前記第２のカム部とは連続して設けられていることを特徴とするレンズ鏡筒。 The lens barrel according to claim 2,
The lens barrel, wherein the first cam portion and the second cam portion are provided continuously. 請求項２または３に記載のレンズ鏡筒において、
前記第1のカム部は、前記第２のカム部に対して傾斜して設けられていることを特徴とするレンズ鏡筒。 In the lens barrel according to claim 2 or 3,
The lens barrel, wherein the first cam portion is provided to be inclined with respect to the second cam portion. 請求項１から4のいずれか一項に記載のレンズ鏡筒において、
前記板状部材は、第１及び第２の板状部材を有し、
前記第２部材は、前記第２部材が前記光学系の物体側に移動した際に前記光学系の物体側に突出して前記第１の板状部材に当接する第１の突出部と、前記第２部材が前記光学系の物体側に移動した際に前記光学系の物体側に突出して前記第２の板状部材に当接する第２の突出部とを有し、
前記第２部材が前記第1部材に対して前記光学系の像面側に移動する際に、前記第２の突出部の前記第２の板状部材への当接が解除されるよりも先に前記第１の突出部の前記第１の板状部材への当接が解除されるように、前記１の突出部よりも前記第２の突出部の突出量を大きく設けたことを特徴とするレンズ鏡筒。 In the lens barrel according to any one of claims 1 to 4,
The plate member has first and second plate members,
The second member includes a first protrusion that protrudes toward the object side of the optical system and contacts the first plate member when the second member moves toward the object side of the optical system; A second protrusion that protrudes toward the object side of the optical system and contacts the second plate member when the two members move toward the object side of the optical system;
When the second member moves to the image plane side of the optical system with respect to the first member, the contact of the second projecting portion with the second plate-like member is released. The protrusion of the second protrusion is larger than the protrusion of the first so that the first protrusion is released from contact with the first plate-like member. Lens barrel to be used. 請求項１から4のいずれか一項に記載のレンズ鏡筒において、
前記板状部材は、第1及び第２の板状部材を有し、
前記第1及び第２の板状部材が前記第２の位置に移動した状態において、前記第２の板状部材の前記光学系の物体側に突出する突出量を前記第１の板状部材の前記光学系の物体側に突出する突出量よりも小さく設けたことを特徴とするレンズ鏡筒。 In the lens barrel according to any one of claims 1 to 4,
The plate-like member has first and second plate-like members,
In the state where the first and second plate-like members are moved to the second position, the amount of protrusion of the second plate-like member that protrudes toward the object side of the optical system is the amount of the first plate-like member. A lens barrel, wherein the lens barrel is provided smaller than a protruding amount protruding toward the object side of the optical system. 請求項１から4のいずれか一項に記載のレンズ鏡筒において、
前記板状部材は、第1及び第２の板状部材を有し、
前記第1及び第２の板状部材が、前記第１の位置において互いの縁部を当接して前記光学系を遮蔽するように、前記第１の板状部材に対して前記第２の板状部材を配置したことを特徴とするレンズ鏡筒。 In the lens barrel according to any one of claims 1 to 4,
The plate-like member has first and second plate-like members,
The second plate with respect to the first plate member so that the first plate member and the second plate member abut each other at the first position to shield the optical system. A lens barrel in which a cylindrical member is arranged. 請求項１から７のいずれか一項に記載のレンズ鏡筒において、
前記板状部材が磁性部を有することを特徴とするレンズ鏡筒。 In the lens barrel according to any one of claims 1 to 7,
The lens barrel, wherein the plate-like member has a magnetic part. 請求項１から８のいずれか一項に記載のレンズ鏡筒において、
前記板状部材を支持する枠部材を前記第１部材に対して着脱可能に設けたことを特徴とするレンズ鏡筒。 In the lens barrel according to any one of claims 1 to 8,
A lens barrel, wherein a frame member that supports the plate-like member is detachably attached to the first member. 請求項１から９のいずれか一項に記載のレンズ鏡筒を備えた撮像装置。 An imaging apparatus comprising the lens barrel according to any one of claims 1 to 9.
JP2009075603A 2009-03-26 2009-03-26 Lens barrel and imaging apparatus Pending JP2010230753A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013125062A (en) * 2011-12-13 2013-06-24 Ricoh Co Ltd Lens cap

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013125062A (en) * 2011-12-13 2013-06-24 Ricoh Co Ltd Lens cap

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