JP2021060478A - Shutter mechanism and imaging apparatus - Google Patents

Shutter mechanism and imaging apparatus Download PDF

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JP2021060478A
JP2021060478A JP2019183581A JP2019183581A JP2021060478A JP 2021060478 A JP2021060478 A JP 2021060478A JP 2019183581 A JP2019183581 A JP 2019183581A JP 2019183581 A JP2019183581 A JP 2019183581A JP 2021060478 A JP2021060478 A JP 2021060478A
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curtain
front curtain
rear curtain
lever
charge
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JP7334569B2 (en
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蓮田 雅徳
Masanori Hasuda
雅徳 蓮田
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Nikon Corp
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Nikon Corp
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Abstract

To provide a shutter mechanism capable of being downsized.SOLUTION: A shutter mechanism 3 of the invention comprises: a front curtain driving member 21 that causes a front curtain to move; a rear curtain driving member 31 that causes a rear curtain to move; a front curtain pressing member 40 for pressing bound of the front curtain driving member 21 in completion of front curtain movement; a rear curtain pressing member 41 for pressing bound of the rear curtain driving member 31 in completion of the rear curtain movement; and a reset cam 50b for driving the front curtain pressing member 40 and the rear curtain pressing member 41. The front curtain pressing member 40 and the rear curtain pressing member 41 are arranged in an area between shafts 102a, 101a of the front curtain driving member 21 and the rear curtain driving member 31 and a shaft 103 of the reset cam 50b.SELECTED DRAWING: Figure 2

Description

本発明は、シャッター機構及び撮像装置に関するものである。 The present invention relates to a shutter mechanism and an imaging device.

カメラのシャッターにおいて、先幕と後幕がそれぞれ駆動部に連結され、駆動部の駆動力によって、被写体光が通過する開口部を開放又は遮蔽するものがある。このようなシャッターにおいて、先幕や後幕の走行完了後に駆動部が他部材に衝突してバウンドし、各羽根が撮像素子の露光に悪影響を与える可能性がある。
このため、バウンドを抑えるストッパー部を有するロック部材が設けられた撮像装置がある(特許文献1参照)。この従来技術では、加速部材を介してチャージカムギアとストッパー部を連動させており、構造が複雑でスペース効率が悪かった。
Some camera shutters have a front curtain and a rear curtain connected to a drive unit, and the driving force of the drive unit opens or shields an opening through which subject light passes. In such a shutter, the drive unit may collide with another member and bounce after the traveling of the front curtain or the rear curtain is completed, and each blade may adversely affect the exposure of the image sensor.
Therefore, there is an imaging device provided with a lock member having a stopper portion for suppressing bounce (see Patent Document 1). In this conventional technique, the charge cam gear and the stopper portion are interlocked via an accelerating member, and the structure is complicated and space efficiency is poor.

特開2016−200683号公報Japanese Unexamined Patent Publication No. 2016-200683

本発明のシャッター機構は、先幕を走行させる先幕駆動部材と、後幕を走行させる後幕駆動部材と、前記先幕走行完了時に、前記先幕駆動部材と当接する先幕当接部材と、前記後幕駆動部材と当接する後幕当接部材と、前記先幕当接部材と当接することによる前記先幕駆動部材のバウンドを押さえる先幕押さえ部材と、前記後幕当接部材と当接することによる前記後幕走行完了時に、前記後幕駆動部材のバウンドを押さえる後幕押さえ部材と、
前記先幕押さえ部材及び後幕押さえ部材を駆動するリセットカムと、を備え、前記先幕押さえ部材及び後幕押さえ部材は、前記先幕駆動部材及び前記後幕駆動部材の軸と、前記リセットカムの軸との間の領域に配置された構成とした。
The shutter mechanism of the present invention includes a front curtain driving member that runs the front curtain, a rear curtain driving member that runs the rear curtain, and a front curtain contact member that comes into contact with the front curtain driving member when the front curtain running is completed. , The rear curtain contact member that comes into contact with the rear curtain drive member, the front curtain pressing member that suppresses the bounce of the front curtain drive member by contacting the front curtain contact member, and the rear curtain contact member. When the rear curtain running is completed by contacting, the rear curtain holding member that holds the bounce of the rear curtain driving member and the rear curtain holding member
The front curtain pressing member and the reset cam for driving the rear curtain pressing member are provided, and the front curtain pressing member and the rear curtain pressing member include the shaft of the front curtain driving member and the rear curtain driving member, and the reset cam. The configuration was arranged in the area between the axis and the axis.

また本発明の撮像装置は、上記シャッター機構を備える構成とした。 Further, the imaging device of the present invention is configured to include the shutter mechanism.

シャッター機構を備えるカメラ1Aの全体ブロック図であるIt is an overall block diagram of the camera 1A provided with a shutter mechanism. 第1状態のシャッター機構3の正面側を上とした斜視図である。It is a perspective view which made the front side of the shutter mechanism 3 of the 1st state face up. 第1状態のシャッター機構3の正面図である。It is a front view of the shutter mechanism 3 of the 1st state. 第1状態のシャッター機構3の一部を示す図で、(a)は正面図、(b)は背面図である。It is a figure which shows a part of the shutter mechanism 3 of the 1st state, (a) is a front view, (b) is a rear view. 第2状態のシャッター機構3の正面図である。It is a front view of the shutter mechanism 3 of the 2nd state. 第2状態のシャッター機構3の一部を示す図で、(a)は正面図、(b)は背面図である。It is a figure which shows a part of the shutter mechanism 3 of the 2nd state, (a) is a front view, (b) is a rear view. 第3状態のシャッター機構3の正面図である。It is a front view of the shutter mechanism 3 of the 3rd state. 第3状態のシャッター機構3の一部を示す図で、(a)は正面図、(b)は背面図である。It is a figure which shows a part of the shutter mechanism 3 of the 3rd state, (a) is a front view, (b) is a rear view. 第4状態のシャッター機構3の一部を示す図で、(a)は正面図、(b)は背面図である。It is a figure which shows a part of the shutter mechanism 3 of the 4th state, (a) is a front view, (b) is a rear view. 第5状態のシャッター機構3の正面図である。It is a front view of the shutter mechanism 3 of the 5th state. 第5状態のシャッター機構3の一部を示す図で、(a)は正面図、(b)は背面図である。It is a figure which shows a part of the shutter mechanism 3 of the 5th state, (a) is a front view, (b) is a rear view. 第6状態のシャッター機構3の一部を示す図で、(a)は正面図、(b)は背面図である。It is a figure which shows a part of the shutter mechanism 3 of the 6th state, (a) is a front view, (b) is a rear view. 第7状態のシャッター機構3の一部を示す図で、(a)は正面図、(b)は背面図である。It is a figure which shows a part of the shutter mechanism 3 of the 7th state, (a) is a front view, (b) is a rear view. 第8状態のシャッター機構3の正面図である。It is a front view of the shutter mechanism 3 of the 8th state. 第8状態のシャッター機構3の一部を示す図で、(a)は正面図、(b)は背面図である。It is a figure which shows a part of the shutter mechanism 3 of the 8th state, (a) is a front view, (b) is a rear view. 第9状態のシャッター機構3の一部を示す図で、(a)は正面図、(b)は背面図である。It is a figure which shows a part of the shutter mechanism 3 of the 9th state, (a) is a front view, (b) is a rear view. 第10状態のシャッター機構3の一部を示す図で、(a)は正面図、(b)は背面図である。It is a figure which shows a part of the shutter mechanism 3 of the tenth state, (a) is a front view, (b) is a rear view. 第11状態のシャッター機構3の正面図である。It is a front view of the shutter mechanism 3 of the eleventh state. 第11状態のシャッター機構3の一部を示す図で、(a)は正面図、(b)は背面図である。It is a figure which shows a part of the shutter mechanism 3 of the eleventh state, (a) is a front view, (b) is a rear view. 第12状態のシャッター機構3の正面図である。It is a front view of the shutter mechanism 3 of the twelfth state. 第12状態のシャッター機構3の一部を示す図で、(a)は正面図、(b)は背面図である。It is a figure which shows a part of the shutter mechanism 3 of the twelfth state, (a) is a front view, (b) is a rear view. 第13状態のシャッター機構3の一部を示す図で、(a)は正面図、(b)は背面図である。It is a figure which shows a part of the shutter mechanism 3 of the thirteenth state, (a) is a front view, (b) is a rear view.

以下、図面等を参照して、本発明の実施形態について説明する。図1は実施形態のシャッター機構3を備えるカメラ1Aの全体ブロック図である。カメラ1Aは、カメラ本体1とレンズ本体10とを備える。 Hereinafter, embodiments of the present invention will be described with reference to the drawings and the like. FIG. 1 is an overall block diagram of a camera 1A including the shutter mechanism 3 of the embodiment. The camera 1A includes a camera body 1 and a lens body 10.

(カメラ本体1)
カメラ本体1は、撮像素子2と、撮像素子2への被写体光の入射制御を行うシャッター機構3と、LV(ライブビュー)画像、撮影画像及び設定関係の各種表示を行う背面LCD(液晶ディスプレイ)4と、撮影、画像表示及び各種設定を行う操作系5と、カメラ本体1内の各ユニットの駆動及びレンズ本体10との通信を行う制御回路6と、制御回路6への電源供給を行う電池7と、レンズマウント13と結合してレンズ本体10を保持するボディーマウント8と、レンズ接点14を通して、レンズ本体10への電源供給、カメラ本体1とレンズ本体10と間の各種通信を行うボディー接点9と、を備える。
(Camera body 1)
The camera body 1 includes an image sensor 2, a shutter mechanism 3 that controls the incidence of subject light on the image sensor 2, and a rear LCD (liquid crystal display) that displays LV (live view) images, captured images, and various settings. 4, the operation system 5 that performs shooting, image display, and various settings, the control circuit 6 that drives each unit in the camera body 1 and communicates with the lens body 10, and the battery that supplies power to the control circuit 6. 7 and the body mount 8 that is coupled to the lens mount 13 to hold the lens body 10 and the body contact that supplies power to the lens body 10 and performs various communications between the camera body 1 and the lens body 10 through the lens contact 14. 9 and.

(レンズ本体10)
レンズ本体10は、被写体像を撮像素子2に結像させる光学系11と、絞り駆動、フォーカス、ズームの光学系の駆動及びカメラ本体1の制御回路6との通信を行うレンズ制御ユニット12と、ボディーマウント8と結合するレンズマウント13と、ボディー接点9を通して、カメラ本体1からの電源供給、カメラ本体1とレンズ本体10と間の各種通信を行うレンズ接点14と、を備える。
(Lens body 10)
The lens body 10 includes an optical system 11 that forms a subject image on the image pickup element 2, a lens control unit 12 that drives an optical system for aperture drive, focus, and zoom, and communicates with the control circuit 6 of the camera body 1. It includes a lens mount 13 that is coupled to the body mount 8 and a lens contact 14 that supplies power from the camera body 1 and performs various communications between the camera body 1 and the lens body 10 through the body contact 9.

(シャッター機構3)
次に、実施形態のシャッター機構3について説明する。以下の説明において、カメラ1Aを用いて撮影を行う場合の撮影者側から見た方向をシャッター機構3の正面といい、被写体側から見た方向をシャッター機構3の背面という。
(Shutter mechanism 3)
Next, the shutter mechanism 3 of the embodiment will be described. In the following description, the direction seen from the photographer side when taking a picture using the camera 1A is referred to as the front surface of the shutter mechanism 3, and the direction seen from the subject side is referred to as the back surface of the shutter mechanism 3.

図2はシャッター機構3の正面側を上とした斜視図である。図3は、シャッター機構3の正面図である。図4(a)はシャッター機構3の一部を示す図で(a)は正面図、(b)は背面図である。図2、図3、図4(a)及び図4(b)は、シャッター機構3の後述する第1状態を示す。 FIG. 2 is a perspective view with the front side of the shutter mechanism 3 facing up. FIG. 3 is a front view of the shutter mechanism 3. 4A is a view showing a part of the shutter mechanism 3, FIG. 4A is a front view, and FIG. 4B is a rear view. 2, FIG. 3, FIG. 4 (a) and FIG. 4 (b) show the first state of the shutter mechanism 3, which will be described later.

シャッター機構3は、撮像素子2へ続く被写体光の光路となる開口部100を開閉することで、撮像素子2への被写体光の入射制御を行う先幕駆動機構200と、後幕駆動機構300と、先幕押さえレバー40と、後幕押さえレバー41と、回転部材50と、先幕チャージレバー51と、後幕チャージレバー52とを備える。 The shutter mechanism 3 includes a front curtain drive mechanism 200 and a rear curtain drive mechanism 300 that control the incident light of the subject light on the image pickup element 2 by opening and closing an opening 100 that serves as an optical path for the subject light leading to the image pickup element 2. A front curtain holding lever 40, a rear curtain holding lever 41, a rotating member 50, a front curtain charge lever 51, and a rear curtain charge lever 52 are provided.

(先幕駆動機構200)
先幕駆動機構200は、先幕ユニット20と、先幕駆動レバー21と、先幕補助レバー22と、先幕チャージピン23と、先幕補助バネ24と、先幕第1緩衝部材25Aと、先幕第2緩衝部材25Bと、先幕マグネット26とを備える。
(Front curtain drive mechanism 200)
The front curtain drive mechanism 200 includes a front curtain unit 20, a front curtain drive lever 21, a front curtain auxiliary lever 22, a front curtain charge pin 23, a front curtain auxiliary spring 24, a front curtain first cushioning member 25A, and the like. The front curtain second cushioning member 25B and the front curtain magnet 26 are provided.

(先幕ユニット20)
先幕ユニット20は、実施形態では3枚の先幕20dと、3枚の先幕20dのそれぞれに回転可能な軸により取り付けられた2つの先幕開閉アーム20e1,20e2とを備える。先幕開閉アーム20e1,20e2のうちの開口部100に対して外側に取り付けられている先幕開閉アーム20e1には、先幕結合穴部20aと、先幕第1軸穴部20bとが設けられている。先幕開閉アーム20eのうちの開口部100に対して先幕開閉アーム20e1よりも内側に取り付けられている先幕開閉アーム20e2には先幕第2軸穴部20cが設けられている。
(First curtain unit 20)
In the embodiment, the front curtain unit 20 includes three front curtains 20d and two front curtain opening / closing arms 20e1 and 20e2 attached to each of the three front curtains 20d by a rotatable shaft. The front curtain opening / closing arm 20e1 attached to the outside of the opening 100 of the front curtain opening / closing arms 20e1 and 20e2 is provided with a front curtain connecting hole 20a and a front curtain first shaft hole 20b. ing. The front curtain opening / closing arm 20e2, which is attached to the inside of the front curtain opening / closing arm 20e1 with respect to the opening 100 of the front curtain opening / closing arm 20e, is provided with a front curtain second shaft hole portion 20c.

先幕結合穴部20aは軸101bに保持され、先幕第1軸穴部20bは軸101aに回転可能に軸支され、先幕第2軸穴部20cは不図示の軸に回転可能に軸支されている。3枚の先幕20dは、軸101aと不図示の軸との相対的な位置関係が変化することにより、畳まれて開口部100を開放する開状態と、展開して開口部100を覆う閉状態とをとることができる。先幕20dが開状態且つ後幕30dも開状態の場合、撮像素子2は露光が可能となる。先幕20d又は後幕30dの少なくとも一方が閉状態の場合、開口部100は覆われて、撮像素子2が遮光された状態となる。 The front curtain coupling hole 20a is held by the shaft 101b, the front curtain first shaft hole 20b is rotatably supported by the shaft 101a, and the front curtain second shaft hole 20c is rotatably shafted to a shaft (not shown). It is supported. The three front curtains 20d are folded to open the opening 100 and closed to cover the opening 100 by changing the relative positional relationship between the shaft 101a and the shaft (not shown). It can take a state. When the front curtain 20d is in the open state and the rear curtain 30d is also in the open state, the image sensor 2 can be exposed. When at least one of the front curtain 20d and the rear curtain 30d is closed, the opening 100 is covered and the image sensor 2 is shielded from light.

(先幕駆動レバー21)
先幕駆動レバー21は、先幕20dを閉方向に走行させるもので、先幕吸着部21aと、先幕結合ピン部21bと、先幕第1当接部21Acと、先幕第2当接部21Bcと、先幕係合部21dと、先幕バネ軸部21eと、先幕バネ受け部21fと、先幕軸穴部21gとを備える。
(Front curtain drive lever 21)
The front curtain drive lever 21 runs the front curtain 20d in the closing direction, and has a front curtain suction portion 21a, a front curtain coupling pin portion 21b, a front curtain first contact portion 21Ac, and a front curtain second contact. A portion 21Bc, a front curtain engaging portion 21d, a front curtain spring shaft portion 21e, a front curtain spring receiving portion 21f, and a front curtain shaft hole portion 21g are provided.

(先幕吸着部21a)
先幕吸着部21aは磁性体で構成され、後述の先幕マグネット26が通電されたときに、先幕マグネット26に保持される。
(Front curtain suction unit 21a)
The front curtain suction portion 21a is made of a magnetic material, and is held by the front curtain magnet 26 when the front curtain magnet 26, which will be described later, is energized.

(先幕結合ピン部21b)
先幕結合ピン部21bは、先幕開閉アーム20e1の先幕結合穴部20aに嵌り、先幕ユニット20を畳まれた開状態と展開された閉状態とに駆動する。
(Front curtain coupling pin portion 21b)
The front curtain coupling pin portion 21b fits into the front curtain coupling hole portion 20a of the front curtain opening / closing arm 20e1 and drives the front curtain unit 20 into a folded open state and an unfolded closed state.

(先幕係合部21d)
先幕係合部21dは、先幕駆動レバー21における、後述する先幕押さえレバー40側の側面に設けられている。先幕係合部21dは、図4(a)に示す正面図において、軸101aを中心として、時計方向に回転したときの後側となる斜面部21daと、前側となる平面部21dbとを有する。斜面部21daは、軸101aから延びる直線に対して傾いており、後述する先幕押さえレバー40の回転中心の軸105側を向くように傾いている。平面部21dbは、軸101aを中心とした径方向に延びる面である。
(Front curtain engaging portion 21d)
The front curtain engaging portion 21d is provided on the side surface of the front curtain drive lever 21 on the front curtain holding lever 40 side, which will be described later. In the front view shown in FIG. 4A, the front curtain engaging portion 21d has a slope portion 21da on the rear side when rotated clockwise around the shaft 101a and a flat surface portion 21db on the front side. .. The slope portion 21da is tilted with respect to a straight line extending from the shaft 101a, and is tilted so as to face the shaft 105 side of the rotation center of the front curtain holding lever 40, which will be described later. The flat surface portion 21db is a surface extending in the radial direction about the axis 101a.

(先幕軸穴部21g)
先幕軸穴部21gは、先幕開閉アーム20e1の先幕第1軸穴部20bとともに軸101aに回転可能に軸支されている。
(Front curtain shaft hole 21g)
The front curtain shaft hole portion 21g is rotatably supported on the shaft 101a together with the front curtain first shaft hole portion 20b of the front curtain opening / closing arm 20e1.

先幕駆動レバー21は先幕軸穴部21gに挿入された不図示の回転軸により軸101aを中心として回動可能で、図4(a)、図4(b)に図中矢印Aで示す正面図における反時計方向に付勢されている。先幕駆動レバー21がA方向に回転すると、先幕20dは畳まれて開口部100を開放した開状態となる。先幕駆動レバー21がA方向と反対向に回転すると、先幕20dは展開されて開口部100を覆った閉状態となる。以後、図中矢印Aで示す、先幕駆動レバー21に加わる先幕20dを開く方向の付勢力を先幕開方向付勢力という。 The front curtain drive lever 21 is rotatable about a shaft 101a by a rotation shaft (not shown) inserted into the front curtain shaft hole portion 21g, and is indicated by an arrow A in FIGS. 4 (a) and 4 (b). It is urged counterclockwise in the front view. When the front curtain drive lever 21 rotates in the A direction, the front curtain 20d is folded and the opening 100 is opened. When the front curtain drive lever 21 rotates in the opposite direction to the A direction, the front curtain 20d is expanded to be in a closed state covering the opening 100. Hereinafter, the urging force in the direction of opening the front curtain 20d applied to the front curtain drive lever 21 indicated by the arrow A in the figure is referred to as a front curtain opening direction urging force.

(先幕補助レバー22)
先幕補助レバー22は、軸101aを中心として、先幕駆動レバー21に対して相対回転する。先幕補助レバー22は、後述する先幕補助バネ24によって、先幕駆動レバー21に対して、図4(a)、図4(b)に矢印Cで示す軸101aを中心とした径方向に相対回転するように付勢されている。しかし、先幕駆動レバー21側に折れ曲がった先幕制限部22aが先幕駆動レバー21の側面に当接することにより、先幕補助レバー22の回転角度は制限されている。
(Front curtain auxiliary lever 22)
The front curtain auxiliary lever 22 rotates relative to the front curtain drive lever 21 about the shaft 101a. The front curtain auxiliary lever 22 is provided with the front curtain auxiliary spring 24 described later in the radial direction with respect to the front curtain drive lever 21 about the axis 101a indicated by the arrow C in FIGS. 4 (a) and 4 (b). It is urged to rotate relative to each other. However, the rotation angle of the front curtain auxiliary lever 22 is limited by the front curtain limiting portion 22a bent toward the front curtain driving lever 21 coming into contact with the side surface of the front curtain driving lever 21.

(先幕チャージピン23)
先幕チャージピン23は光軸方向に延びるピンで、先幕補助レバー22に一体的に取り付けられている。
(First curtain charge pin 23)
The front curtain charge pin 23 is a pin extending in the optical axis direction and is integrally attached to the front curtain auxiliary lever 22.

(先幕補助バネ24)
先幕補助バネ24は、図4(a)に示すように先幕コイル部24aと、先幕コイル部24aから2方向に延びる先幕フック部24bとを有する。先幕コイル部24aは、先幕駆動レバー21の先幕バネ軸部21eに取り付けられ、先幕フック部24bの一方は先幕駆動レバー21の先幕バネ受け部21fに、他方は先幕チャージピン23に当接している。
これにより、先幕補助レバー22を先幕駆動レバー21に対して図4(a)中反時計方向に付勢し、先幕補助レバー22の先幕制限部22aが先幕駆動レバー21に押し付けられている。先幕補助バネ24の先幕フック部24b間の間隔が狭まる方向に力が加わらないかぎり、先幕補助レバー22と先幕駆動レバー21とは一体的に反時計方向(正面側から見て)に駆動される。
(Front curtain auxiliary spring 24)
As shown in FIG. 4A, the front curtain auxiliary spring 24 has a front curtain coil portion 24a and a front curtain hook portion 24b extending in two directions from the front curtain coil portion 24a. The front curtain coil portion 24a is attached to the front curtain spring shaft portion 21e of the front curtain drive lever 21, one of the front curtain hook portions 24b is attached to the front curtain spring receiving portion 21f of the front curtain drive lever 21, and the other is the front curtain charge. It is in contact with the pin 23.
As a result, the front curtain auxiliary lever 22 is urged against the front curtain drive lever 21 in the counterclockwise direction in FIG. 4A, and the front curtain limiting portion 22a of the front curtain auxiliary lever 22 is pressed against the front curtain drive lever 21. Has been done. Unless a force is applied in the direction in which the distance between the front curtain hook portions 24b of the front curtain auxiliary spring 24 is narrowed, the front curtain auxiliary lever 22 and the front curtain drive lever 21 are integrally counterclockwise (when viewed from the front side). Driven by.

(先幕第1緩衝部材25A)
先幕第1緩衝部材25Aは、ゴム状の弾性部材であり、カメラ本体1に固定され、先幕第1当接部21Acの回動軌跡内に配置されている。
図4(a)において先幕駆動レバー21が反時計方向に回転すると、先幕第1当接部21Acが先幕第1緩衝部材25Aに当接し、先幕緩衝部材25を弾性変形させる。
(First curtain first buffer member 25A)
The front curtain first cushioning member 25A is a rubber-like elastic member, is fixed to the camera body 1, and is arranged in the rotation locus of the front curtain first contact portion 21Ac.
When the front curtain drive lever 21 rotates counterclockwise in FIG. 4A, the front curtain first contact portion 21Ac abuts on the front curtain first cushioning member 25A, and the front curtain cushioning member 25 is elastically deformed.

(先幕第2緩衝部材25B)
先幕第2緩衝部材25Bは、ゴム状の弾性部材であり、カメラ本体1に固定され、先幕第2当接部21Bcの回動軌跡内に配置されている。
図4(a)において先幕駆動レバー21が反時計方向に回転すると、先幕第1当接部21Acが先幕第1緩衝部材25Aに当接した後に、先幕第2当接部21bcが先幕第2緩衝部材25Bに当接し、先幕第2緩衝部材25を弾性変形させる。
(First curtain second buffer member 25B)
The front curtain second cushioning member 25B is a rubber-like elastic member, is fixed to the camera body 1, and is arranged in the rotation locus of the front curtain second contact portion 21Bc.
In FIG. 4A, when the front curtain drive lever 21 rotates counterclockwise, the front curtain first contact portion 21Ac comes into contact with the front curtain first cushioning member 25A, and then the front curtain second contact portion 21bc It abuts on the front curtain second cushioning member 25B and elastically deforms the front curtain second cushioning member 25.

(先幕マグネット26)
先幕マグネット26は、先幕端子部26bと先幕吸着部26aとを有する。先幕吸着部26aは、先幕駆動レバー21の先幕吸着部21aの回動軌跡内にあり、図4(a)に示す先幕駆動レバー21の時計方向に回転により、先幕吸着部21aが先幕吸着部26aに当接する。
(Front curtain magnet 26)
The front curtain magnet 26 has a front curtain terminal portion 26b and a front curtain suction portion 26a. The front curtain suction portion 26a is located in the rotation locus of the front curtain suction portion 21a of the front curtain drive lever 21, and is rotated clockwise of the front curtain drive lever 21 shown in FIG. 4A to cause the front curtain suction portion 21a. Abuts on the front curtain suction portion 26a.

先幕端子部26bに通電することにより先幕吸着部26aは磁力を発生する。先幕マグネット26の先幕吸着部26aに先幕駆動レバー21の先幕吸着部21aが当接した状態で、先幕端子部26bに通電することにより、先幕開方向付勢力に抗して先幕駆動レバー21の先幕吸着部21aを、磁力により吸着保持可能となっている。先幕端子部26bへの通電を停止することにより、先幕駆動レバー21は先幕開方向付勢力により、図4(a)において反時計方向に回転可能となる。 By energizing the front curtain terminal portion 26b, the front curtain suction portion 26a generates a magnetic force. By energizing the front curtain terminal portion 26b with the front curtain suction portion 21a of the front curtain drive lever 21 in contact with the front curtain suction portion 26a of the front curtain magnet 26, the front curtain opening direction urging force is resisted. The front curtain suction portion 21a of the front curtain drive lever 21 can be attracted and held by magnetic force. By stopping the energization of the front curtain terminal portion 26b, the front curtain drive lever 21 can rotate counterclockwise in FIG. 4A due to the front curtain opening direction urging force.

(後幕駆動機構300)
後幕駆動機構300は、後幕ユニット30と、後幕駆動レバー31と、後幕補助レバー32と、後幕チャージピン33と、後幕補助バネ34と、後幕緩衝部材35と、後幕マグネット36とを備える。
(Rear curtain drive mechanism 300)
The rear curtain drive mechanism 300 includes a rear curtain unit 30, a rear curtain drive lever 31, a rear curtain auxiliary lever 32, a rear curtain charge pin 33, a rear curtain auxiliary spring 34, a rear curtain cushioning member 35, and a rear curtain. A magnet 36 is provided.

(後幕ユニット30)
後幕ユニット30は、実施形態では3枚の後幕30dと、3枚の後幕30dのそれぞれに回転可能な軸により取り付けられた2つの後幕開閉アーム30e1,30e2とを備える。後幕開閉アーム30e1,30e2のうちの開口部100に対して外側に取り付けられている後幕開閉アーム30e1には、後幕結合穴部30aと、後幕第1軸穴部30bとが設けられている。後幕開閉アーム30eのうちの開口部100に対して後幕開閉アーム30e1よりも内側に取り付けられている後幕開閉アーム30e2には、後幕第2軸穴部30cが設けられている。
(Second curtain unit 30)
In the embodiment, the rear curtain unit 30 includes three rear curtains 30d and two rear curtain opening / closing arms 30e1 and 30e2 attached to each of the three rear curtains 30d by a rotatable shaft. The rear curtain opening / closing arm 30e1 attached to the outside of the opening 100 of the rear curtain opening / closing arms 30e1 and 30e2 is provided with a rear curtain connecting hole 30a and a rear curtain first shaft hole 30b. ing. The rear curtain opening / closing arm 30e2, which is attached to the inside of the rear curtain opening / closing arm 30e1 with respect to the opening 100 of the rear curtain opening / closing arm 30e, is provided with a rear curtain second shaft hole portion 30c.

後幕結合穴部30aは軸102bに保持され、後幕第1軸穴部30bは軸102aに、後幕第2軸穴部30cは不図示の軸に回転可能に軸支されている。3枚の後幕30dは、軸102aと不図示の軸との相対的な位置関係が変化することにより、畳まれて開口部100を開放する開状態と、展開して開口部100を覆う閉状態とを取ることができる。 The rear curtain coupling hole 30a is held by the shaft 102b, the rear curtain first shaft hole 30b is rotatably supported by the shaft 102a, and the rear curtain second shaft hole 30c is rotatably supported by a shaft (not shown). The three rear curtains 30d are folded to open the opening 100 and closed to cover the opening 100 by changing the relative positional relationship between the shaft 102a and the shaft (not shown). You can take the state.

(後幕駆動レバー31)
後幕駆動レバー31は、後幕30dを開方向に駆動させるもので、後幕吸着部31aと、後幕結合ピン部31bと、後幕当接部31cと、後幕係合部31dと、後幕バネ軸部31eと、後幕バネ受け部31fと、後幕軸穴部31gとを備える。
(Rear curtain drive lever 31)
The rear curtain drive lever 31 drives the rear curtain 30d in the opening direction, and includes a rear curtain suction portion 31a, a rear curtain coupling pin portion 31b, a rear curtain contact portion 31c, and a rear curtain engaging portion 31d. A rear curtain spring shaft portion 31e, a rear curtain spring receiving portion 31f, and a rear curtain shaft hole portion 31g are provided.

(後幕吸着部31a)
後幕吸着部31aは磁性体で構成されている。後述の後幕マグネット36が通電されたときに、後幕マグネット36に保持される。
(Rear curtain suction part 31a)
The rear curtain suction portion 31a is made of a magnetic material. When the rear curtain magnet 36, which will be described later, is energized, it is held by the rear curtain magnet 36.

(後幕結合ピン部31b)
後幕結合ピン部31bは、後幕開閉アーム30e1の後幕結合穴部30aに嵌り、後幕30dを畳まれた開状態と展開された閉状態とに駆動する。
(Rear curtain coupling pin portion 31b)
The rear curtain coupling pin portion 31b fits into the rear curtain coupling hole portion 30a of the rear curtain opening / closing arm 30e1 and drives the rear curtain 30d into a folded open state and an unfolded closed state.

(後幕係合部31d)
後幕係合部31dは、図4(a)に示す正面図において、軸102aを中心として、矢印Bで示す反時計方向に回転したときの前側となる部分の角部に斜面部31daと、後側に平面部31dbとを有する。斜面部31daは、軸101aを中心とした円周の接線に対して、先幕軸穴部40cを向くように傾いている。平面部31dbは、軸102aを中心とした径方向に延びる面である。
(Rear curtain engaging portion 31d)
In the front view shown in FIG. 4A, the rear curtain engaging portion 31d has a slope portion 31da at a corner of a portion that becomes a front side when rotated counterclockwise as indicated by an arrow B about a shaft 102a. It has a flat surface portion 31db on the rear side. The slope portion 31da is inclined so as to face the front curtain shaft hole portion 40c with respect to the tangent line of the circumference centered on the shaft 101a. The flat surface portion 31db is a surface extending in the radial direction about the shaft 102a.

(後幕軸穴部31g)
後幕軸穴部31gは、後幕開閉アーム30e1の後幕第1軸穴部30bとともに軸102aに回転可能に軸支されている。
(Rear curtain shaft hole 31g)
The rear curtain shaft hole portion 31g is rotatably supported on the shaft 102a together with the rear curtain first shaft hole portion 30b of the rear curtain opening / closing arm 30e1.

後幕駆動レバー31は、後幕軸穴部31gに挿入された不図示の回転軸により軸102aを中心として回動可能で、図4(a)、図4(b)に図中矢印Bで示す正面図における反時計方向に付勢されている。後幕駆動レバー31がB方向に回転すると、後幕30dは展開して開口部100を閉じた閉状態となる。後幕駆動レバー31がB方向と反対方向に回転すると、後幕30dは閉じて開口部100を開放した開状態となる。以後、図中矢印Bで示す、後幕駆動レバー31に加わる後幕30dを閉じる方向の付勢力を、後幕閉方向付勢力という。 The rear curtain drive lever 31 can be rotated about the shaft 102a by a rotation shaft (not shown) inserted into the rear curtain shaft hole portion 31g, and is indicated by an arrow B in the drawings in FIGS. 4 (a) and 4 (b). It is urged counterclockwise in the front view shown. When the rear curtain drive lever 31 rotates in the B direction, the rear curtain 30d expands and the opening 100 is closed. When the rear curtain drive lever 31 rotates in the direction opposite to the B direction, the rear curtain 30d is closed and the opening 100 is opened. Hereinafter, the urging force in the direction of closing the rear curtain 30d applied to the rear curtain drive lever 31 indicated by the arrow B in the figure is referred to as the rear curtain closing direction urging force.

(後幕補助レバー32)
後幕補助レバー32は、軸102aを中心として、後幕駆動レバー31に対して相対回転する。後幕補助レバー32は、後述する後幕補助バネ34によって、後幕駆動レバー31に対して、図4(a)、図4(b)に矢印Dで示す軸102aを中心とした径方向に相対回転するように付勢されている。しかし、後幕駆動レバー31側に折れ曲がった後幕制限部32aが後幕駆動レバー31の側面に当接することにより、後幕補助レバー32の回転角度は制限されている。
(Rear curtain auxiliary lever 32)
The rear curtain auxiliary lever 32 rotates relative to the rear curtain drive lever 31 about the shaft 102a. The rear curtain auxiliary lever 32 is provided by the rear curtain auxiliary spring 34, which will be described later, in the radial direction about the axis 102a indicated by the arrow D in FIGS. 4 (a) and 4 (b) with respect to the rear curtain drive lever 31. It is urged to rotate relative to each other. However, the rotation angle of the rear curtain auxiliary lever 32 is limited by the rear curtain limiting portion 32a bent toward the rear curtain driving lever 31 coming into contact with the side surface of the rear curtain driving lever 31.

(後幕チャージピン33)
後幕チャージピン33は光軸方向に延びるピンで、後幕補助レバー32に一体的に取り付けられている。
(Second curtain charge pin 33)
The rear curtain charge pin 33 is a pin extending in the optical axis direction and is integrally attached to the rear curtain auxiliary lever 32.

(後幕補助バネ34)
後幕補助バネ34は、図4(a)に示すように後幕コイル部34aと、後幕コイル部34aから2方向に延びる後幕フック部34bとを有する。後幕コイル部34aは、後幕駆動レバー31の後幕バネ軸部31eに取り付けられ、後幕フック部34bの一方は後幕駆動レバー31の後幕バネ受け部31fに、他方は後幕チャージピン33に当接している。
これにより、後幕補助レバー32を後幕駆動レバー31に対して図4(a)中、反時計方向に付勢し、後幕補助レバー32の後幕制限部32aが後幕駆動レバー31に押し付けられている。後幕補助バネ34の後幕フック部34b間の間隔が狭まる方向に力が加わらないかぎり、後幕補助レバー32と後幕駆動レバー31とは一体的に反時計方向(正面側から見て)に駆動される。
(Rear curtain auxiliary spring 34)
As shown in FIG. 4A, the rear curtain auxiliary spring 34 has a rear curtain coil portion 34a and a rear curtain hook portion 34b extending in two directions from the rear curtain coil portion 34a. The rear curtain coil portion 34a is attached to the rear curtain spring shaft portion 31e of the rear curtain drive lever 31, one of the rear curtain hook portions 34b is attached to the rear curtain spring receiving portion 31f of the rear curtain drive lever 31, and the other is the rear curtain charge. It is in contact with the pin 33.
As a result, the rear curtain auxiliary lever 32 is urged against the rear curtain drive lever 31 in the counterclockwise direction in FIG. 4A, and the rear curtain limiting portion 32a of the rear curtain auxiliary lever 32 becomes the rear curtain drive lever 31. It is being pressed. Unless a force is applied in the direction in which the distance between the rear curtain auxiliary spring 34 and the rear curtain hook portion 34b is narrowed, the rear curtain auxiliary lever 32 and the rear curtain drive lever 31 are integrally counterclockwise (when viewed from the front side). Driven by.

(後幕緩衝部材35)
後幕緩衝部材35は、ゴム状の弾性部材であり、後幕駆動レバー31の回動軌跡内に配置され、図4(a)において後幕駆動レバー31が反時計方向に回転すると、後幕駆動レバー31の後幕当接部31cが当接する。後幕駆動レバー31の回動により後幕当接部31cが当接すると、後幕緩衝部材35は弾性変形し、後幕駆動レバー31の駆動エネルギーを吸収し、後幕駆動レバー31の回動を停止させる。後幕駆動レバー31の回動停止後は、後幕緩衝部材35の弾性変形による戻し力で戻され、先付勢部材からの駆動力と戻し力が釣り合った位置で、先幕駆動レバーが静止する。
(Rear curtain buffer member 35)
The rear curtain cushioning member 35 is a rubber-like elastic member and is arranged in the rotation locus of the rear curtain drive lever 31. When the rear curtain drive lever 31 rotates counterclockwise in FIG. 4A, the rear curtain is rear curtained. The rear curtain contact portion 31c of the drive lever 31 comes into contact with each other. When the rear curtain contact portion 31c comes into contact with the rotation of the rear curtain drive lever 31, the rear curtain buffer member 35 elastically deforms, absorbs the drive energy of the rear curtain drive lever 31, and rotates the rear curtain drive lever 31. To stop. After the rotation of the rear curtain drive lever 31 is stopped, the rear curtain drive lever 31 is returned by the return force due to the elastic deformation of the rear curtain buffer member 35, and the front curtain drive lever is stationary at a position where the drive force and the return force from the front curtain member are balanced. To do.

(後幕マグネット36)
後幕マグネット36は、後幕端子部36bと、後吸着部36aとを有する。後幕マグネット36は、後幕駆動レバー31の回動軌跡内にあり、図4(a)に示す後幕駆動レバー31の時計方向に回転により、後幕駆動レバー31の後幕吸着部31aが、後幕マグネット36の後吸着部36aに当接する。
(Rear curtain magnet 36)
The rear curtain magnet 36 has a rear curtain terminal portion 36b and a rear curtain attracting portion 36a. The rear curtain magnet 36 is located in the rotation locus of the rear curtain drive lever 31, and the rear curtain suction portion 31a of the rear curtain drive lever 31 is rotated clockwise by the rear curtain drive lever 31 shown in FIG. 4 (a). , It comes into contact with the rear suction portion 36a of the rear curtain magnet 36.

後幕端子部36bに通電することにより後吸着部36aは磁力を発生し、後幕マグネット36の後吸着部36aに後幕駆動レバー31の後幕吸着部31aが当接した状態で、後幕端子部36bに通電することにより、後幕閉方向付勢力に抗して後幕駆動レバー31の後幕吸着部31aを、吸着保持可能となっている。後幕端子部36bへの通電を停止することにより、後幕駆動レバー31は後幕駆動機構300の駆動力により、図4(a)において反時計方向に回転可能となる。 By energizing the rear curtain terminal portion 36b, the rear curtain suction portion 36a generates a magnetic force, and the rear curtain suction portion 31a in contact with the rear curtain suction portion 36a of the rear curtain magnet 36 is in contact with the rear curtain suction portion 31a. By energizing the terminal portion 36b, the rear curtain suction portion 31a of the rear curtain drive lever 31 can be sucked and held against the rear curtain closing direction urging force. By stopping the energization of the rear curtain terminal portion 36b, the rear curtain drive lever 31 can be rotated counterclockwise in FIG. 4A by the driving force of the rear curtain drive mechanism 300.

(先幕押さえレバー40)
図4(a)、図4(b)に示す先幕押さえレバー40は、先幕係止部40aと、先幕連動部40bと、先幕軸穴部40cと、先幕バネ付勢部40eとを備える。先幕押さえレバー40は、軸105に沿う先幕軸穴部40cに軸支された細長い部材である。
(Front curtain holding lever 40)
The front curtain holding lever 40 shown in FIGS. 4 (a) and 4 (b) includes a front curtain locking portion 40a, a front curtain interlocking portion 40b, a front curtain shaft hole portion 40c, and a front curtain spring urging portion 40e. And. The front curtain holding lever 40 is an elongated member pivotally supported by the front curtain shaft hole portion 40c along the shaft 105.

(先幕係止部40a)
先幕係止部40aは、先幕押さえレバー40の一方の端部の先幕駆動レバー21側に設けられている。先幕係止部40aは、図4(a)に示す正面図において、軸105を中心とした径方向内側となる平面部40abと、径方向外側となる斜面部40aaとを有する。斜面部40aaは、軸105を中心とした円周の接線に対して、先幕補助レバー22を向くように傾いている。平面部40abは、軸105cを中心とした円周の接線に略沿っている。先幕係止部40aは、軸105を中心として、先幕駆動レバー21の先幕係合部21dの回動軌跡内にある係止位置(バウンスロック位置)と回動軌跡外の退避位置(バウンスアンロック位置)との間で移動可能である。
(Front curtain locking portion 40a)
The front curtain locking portion 40a is provided on the front curtain drive lever 21 side of one end of the front curtain holding lever 40. In the front view shown in FIG. 4A, the front curtain locking portion 40a has a flat surface portion 40ab that is radially inside with respect to the shaft 105 and a slope portion 40aa that is radially outside. The slope portion 40aa is tilted so as to face the front curtain auxiliary lever 22 with respect to the tangent line of the circumference centered on the shaft 105. The flat surface portion 40ab is substantially along the tangent line of the circumference centered on the axis 105c. The front curtain locking portion 40a has a locking position (bounce lock position) in the rotation locus of the front curtain engaging portion 21d of the front curtain drive lever 21 and a retracting position outside the rotation locus (bounce lock position) about the shaft 105. It is possible to move to and from the bounce unlock position).

(先幕連動部40b)
先幕連動部40bは、先幕押さえレバー40の他方の端部に設けられ、後述する後幕連動ピン部41bにより軸105を中心として駆動される。
(Front curtain interlocking part 40b)
The front curtain interlocking portion 40b is provided at the other end of the front curtain holding lever 40, and is driven around the shaft 105 by the rear curtain interlocking pin portion 41b described later.

(先幕バネ付勢部40e)
先幕バネ付勢部40eには、係止レバーバネ42の一端が当接し、通常、先幕バネ付勢部40eは図4(b)に矢印Eで示す背面側からみて反時計方向に付勢されている。このとき、先幕係止部40aは先幕駆動レバー21の先幕係合部21dの回動軌跡に位置して先幕駆動レバー21の回動を制限するバウンスロック位置にある。
(Front curtain spring urging part 40e)
One end of the locking lever spring 42 abuts on the front curtain spring urging portion 40e, and normally, the front curtain spring urging portion 40e is urged counterclockwise when viewed from the back side indicated by the arrow E in FIG. 4 (b). Has been done. At this time, the front curtain locking portion 40a is located in the rotation locus of the front curtain engaging portion 21d of the front curtain drive lever 21 and is in the bounce lock position that limits the rotation of the front curtain drive lever 21.

(後幕押さえレバー41)
後幕押さえレバー41は、後幕係止部41aと、後幕連動ピン部41bと、後幕解除ピン部41cと、後幕軸穴部41dと、後幕バネ付勢部41eとを備える。後幕押さえレバー41は、後幕軸穴部41dに挿通された軸104に軸支された細長い部材である。
(Rear curtain holding lever 41)
The rear curtain holding lever 41 includes a rear curtain locking portion 41a, a rear curtain interlocking pin portion 41b, a rear curtain release pin portion 41c, a rear curtain shaft hole portion 41d, and a rear curtain spring urging portion 41e. The rear curtain holding lever 41 is an elongated member pivotally supported by a shaft 104 inserted into the rear curtain shaft hole portion 41d.

(後幕係止部41a)
後幕係止部41aは、後幕押さえレバー41の一方の端部の後幕駆動レバー31側に設けられている。後幕係止部41aは、正面図における軸104を中心とした径方向内側となる斜面部41aaと、径方向外側となる平面部41abとを有する。斜面部41aaは、軸104を中心とした円周の接線に対して傾いている。平面部41abは、軸104を中心とした周方向に延びる。後幕係止部41aは、軸104を中心として、後幕駆動レバー31の後幕係合部31dの回動軌跡内にある係止位置(バウンスロック位置)と回動軌跡外の退避位置(バウンスアンロック位置)との間で移動可能である。
(Rear curtain locking portion 41a)
The rear curtain locking portion 41a is provided on the rear curtain drive lever 31 side of one end of the rear curtain holding lever 41. The rear curtain locking portion 41a has a slope portion 41aa on the inner side in the radial direction about the shaft 104 in the front view and a flat surface portion 41ab on the outer side in the radial direction. The slope portion 41aa is inclined with respect to the tangent line of the circumference about the axis 104. The flat surface portion 41ab extends in the circumferential direction about the axis 104. The rear curtain locking portion 41a has a locking position (bounce lock position) in the rotation locus of the rear curtain engaging portion 31d of the rear curtain drive lever 31 and a retracting position outside the rotation locus (bounce lock position) about the shaft 104. It is possible to move to and from the bounce unlock position).

(後幕連動ピン部41b)
後幕連動ピン部41bは、後幕押さえレバー41の背面側における、軸104に対して後幕係止部41aと逆側に設けられ、背面側に向って延びている。軸104を中心として後幕押さえレバー41が回動したときに、先幕連動部40bを押し、先幕押さえレバー40を回動させる。
(Rear curtain interlocking pin portion 41b)
The rear curtain interlocking pin portion 41b is provided on the rear side of the rear curtain holding lever 41 on the side opposite to the rear curtain locking portion 41a with respect to the shaft 104, and extends toward the rear curtain side. When the rear curtain holding lever 41 rotates around the shaft 104, the front curtain interlocking portion 40b is pushed to rotate the front curtain holding lever 40.

(後幕解除ピン部41c)
後幕解除ピン部41cは、後述のリセットカム50bによって駆動される。
(Rear curtain release pin portion 41c)
The rear curtain release pin portion 41c is driven by a reset cam 50b, which will be described later.

(後幕バネ付勢部41e)
後幕バネ付勢部41eには、係止レバーバネ42の一端が当接し、図4(b)に矢印Fで示す背面側からみて時計方向に付勢され、後幕係止部41aが後幕駆動レバー31の後幕係合部31dの回動軌跡内に位置している。
(Rear curtain spring urging part 41e)
One end of the locking lever spring 42 abuts on the rear curtain spring urging portion 41e and is urged clockwise when viewed from the rear side indicated by the arrow F in FIG. 4B, and the rear curtain locking portion 41a is the rear curtain. It is located in the rotation locus of the rear curtain engaging portion 31d of the drive lever 31.

(係止レバーバネ42)
係止レバーバネ42は、後幕押さえレバー41の後幕軸穴部41dの軸104と同軸に配置されたコイルばねで、図4(b)に示すように一端は先幕押さえレバー40のバネ付勢部40eを背面図において反時計方向に付勢し、他端は後幕押さえレバー41の後幕バネ付勢部41eを時計方向に付勢している。
(Locking lever spring 42)
The locking lever spring 42 is a coil spring arranged coaxially with the shaft 104 of the rear curtain shaft hole portion 41d of the rear curtain holding lever 41, and one end is equipped with a spring of the front curtain holding lever 40 as shown in FIG. 4 (b). The urging portion 40e is urged counterclockwise in the rear view, and the other end urges the rear curtain spring urging portion 41e of the rear curtain holding lever 41 in the clockwise direction.

(回転部材50)
回転部材50は、先幕駆動機構200及び後幕駆動機構300の撮影者側に配置され、チャージカム50aと、リセットカム50bと、駆動ギヤ部50cと、軸穴部50dとを備える。軸穴部50dは、不図示の軸部材に軸支され、軸103を中心として回転する。駆動ギヤ部50cには不図示の駆動系が接続され、回転部材50が回転駆動される。チャージカム50aは、後述する先幕チャージレバー51、後幕チャージレバー52を駆動する。リセットカム50bは、後幕押さえレバー41の後幕解除ピン部41cを駆動し、先幕押さえレバー40と後幕押さえレバー41を駆動する。リセットカム50bのカム半径の小さい領域と、チャージカム50aの最大のカム半径の領域とは角度方向に重ならない位置に配置されている。
(Rotating member 50)
The rotating member 50 is arranged on the photographer side of the front curtain drive mechanism 200 and the rear curtain drive mechanism 300, and includes a charge cam 50a, a reset cam 50b, a drive gear portion 50c, and a shaft hole portion 50d. The shaft hole portion 50d is pivotally supported by a shaft member (not shown) and rotates about the shaft 103. A drive system (not shown) is connected to the drive gear portion 50c, and the rotating member 50 is rotationally driven. The charge cam 50a drives the front curtain charge lever 51 and the rear curtain charge lever 52, which will be described later. The reset cam 50b drives the rear curtain release pin portion 41c of the rear curtain pressing lever 41, and drives the front curtain pressing lever 40 and the rear curtain pressing lever 41. A region having a small cam radius of the reset cam 50b and a region having a maximum cam radius of the charge cam 50a are arranged at positions where they do not overlap in the angular direction.

(先幕チャージレバー51)
先幕チャージレバー51は、先幕チャージ部51aと、先幕カム当接部51bと、先幕軸穴部51cとを備える。先幕軸穴部51cは、不図示の軸に軸支されている。先幕カム当接部51bは、回転部材50のチャージカム50aにより駆動され、先幕チャージレバー51が正面側から見て図2で矢印で示すように正面から見て時計方向に回転すると、先幕チャージ部51aが先幕チャージピン23を駆動する。これにより先幕補助レバー22が先幕開方向付勢力に抗して正面側から見て時計方向に回転する。そうすると、先幕補助バネ24を介して先幕駆動レバー21も正面側から見て時計方向に回転する。さらに先幕20dも畳まれた開口部100を開放する状態から、展開して開口部100を覆う状態となる方向に駆動される。なお、先幕チャージレバー51は、不図示の付勢部材により、正面から見て反時計方向に付勢されている。
(First curtain charge lever 51)
The front curtain charge lever 51 includes a front curtain charge portion 51a, a front curtain cam contact portion 51b, and a front curtain shaft hole portion 51c. The front curtain shaft hole portion 51c is pivotally supported by a shaft (not shown). The front curtain cam contact portion 51b is driven by the charge cam 50a of the rotating member 50, and when the front curtain charge lever 51 rotates clockwise when viewed from the front as shown by an arrow in FIG. 2 when viewed from the front side, the front curtain cam contact portion 51b The curtain charge unit 51a drives the front curtain charge pin 23. As a result, the front curtain auxiliary lever 22 rotates clockwise when viewed from the front side against the front curtain opening direction urging force. Then, the front curtain drive lever 21 also rotates clockwise when viewed from the front side via the front curtain auxiliary spring 24. Further, the front curtain 20d is also driven in a direction in which the folded opening 100 is opened and then expanded to cover the opening 100. The front curtain charge lever 51 is urged counterclockwise when viewed from the front by an urging member (not shown).

(後幕チャージレバー52)
後幕チャージレバー52は、後幕チャージ部52aと、後幕カム当接部52bと、後幕カム当接部52cとを備える。後幕カム当接部52cは、不図示の軸に軸支されている。後幕カム当接部52bは、回転部材50のチャージカム50aに駆動され、後幕チャージレバー52が正面側から見て図2に矢印で示すように時計方向に回転すると、後幕チャージ部52aが後幕チャージピン33を駆動する。これにより後幕補助レバー32が後幕閉方向付勢力に抗して正面側から見て時計方向に回転する。そうすると、後幕補助バネ34を介して後幕駆動レバー31も正面側から見て時計方向に回転する。さらに後幕30dも展開して開口部100を覆う状態から、畳まれた開口部100を開放する状態となる方向に駆動される。なお、後幕チャージレバー52は不図示の付勢部材により、正面から見て反時計方向に付勢されている。
(Second curtain charge lever 52)
The rear curtain charge lever 52 includes a rear curtain charge portion 52a, a rear curtain cam contact portion 52b, and a rear curtain cam contact portion 52c. The rear curtain cam contact portion 52c is pivotally supported by a shaft (not shown). The rear curtain cam contact portion 52b is driven by the charge cam 50a of the rotating member 50, and when the rear curtain charge lever 52 rotates clockwise as shown by an arrow in FIG. 2 when viewed from the front side, the rear curtain charge portion 52a Drives the rear curtain charge pin 33. As a result, the rear curtain auxiliary lever 32 rotates clockwise when viewed from the front side against the rear curtain closing direction urging force. Then, the rear curtain drive lever 31 also rotates clockwise when viewed from the front side via the rear curtain auxiliary spring 34. Further, the rear curtain 30d is also driven in a direction in which the folded opening 100 is opened from the state where the rear curtain 30d is expanded to cover the opening 100. The rear curtain charge lever 52 is urged counterclockwise when viewed from the front by an urging member (not shown).

先幕チャージレバー51と後幕チャージレバー52は、それぞれの回転軸に垂直な平面にて、ほぼ同一平面内にあり、回転部材50の回転によって、順次駆動される。 The front curtain charge lever 51 and the rear curtain charge lever 52 are in substantially the same plane in a plane perpendicular to their respective rotation axes, and are sequentially driven by the rotation of the rotating member 50.

(シャッター機構3の動作)
(第1状態)
(1)電源オン直後
図3は、操作系5を操作して電源をオンにした直後のシャッター機構3の第1状態である。図4は第1状態のシャッター機構3の一部を示す図で、(a)は正面図、(b)は背面図である。
電源をオンにすると、カメラ1Aはライブビュー状態となり、背面LCD4にライブビュー画像が表示される。カメラ1A内に保存された撮影画像を背面LCD4に表示させたり、操作系5と背面LCD4を使用して各種設定を行ったりすることができる。
(Operation of shutter mechanism 3)
(First state)
(1) Immediately after the power is turned on FIG. 3 shows the first state of the shutter mechanism 3 immediately after the power is turned on by operating the operation system 5. 4A and 4B are views showing a part of the shutter mechanism 3 in the first state, where FIG. 4A is a front view and FIG. 4B is a rear view.
When the power is turned on, the camera 1A is in the live view state, and the live view image is displayed on the rear LCD 4. The captured image stored in the camera 1A can be displayed on the rear LCD 4, and various settings can be made using the operation system 5 and the rear LCD 4.

(先幕)
図3に示すように先幕20dは先幕開方向付勢力で開状態に保持されている。図4に示すように先幕係合部21dの移動は先幕係止部40aによりロックされているバウンスロック状態である。
(First curtain)
As shown in FIG. 3, the front curtain 20d is held in the open state by the front curtain opening direction urging force. As shown in FIG. 4, the movement of the front curtain engaging portion 21d is a bounce lock state in which the front curtain engaging portion 21d is locked by the front curtain locking portion 40a.

(後幕)
図3に示すように後幕30dは後幕チャージレバー52によって後幕閉方向付勢力に抗して開状態に保持されている。
図4に示すように後幕係合部31dの移動は後幕係止部41aによりロックされていないバウンスアンロック状態である。
(Second curtain)
As shown in FIG. 3, the rear curtain 30d is held in the open state by the rear curtain charge lever 52 against the rear curtain closing direction urging force.
As shown in FIG. 4, the movement of the rear curtain engaging portion 31d is a bounce unlocked state in which the rear curtain engaging portion 31d is not locked by the rear curtain locking portion 41a.

(2)レリーズオン後
上記(1)の状態で、操作系5を操作して撮影指示(レリーズ)を行うと、後幕端子部36bに通電され、後幕マグネット36が後幕駆動レバー31を保持する。
(2) After release on When a shooting instruction (release) is given by operating the operation system 5 in the state of (1) above, the rear curtain terminal portion 36b is energized and the rear curtain magnet 36 presses the rear curtain drive lever 31. Hold.

(先幕)
先幕20dは先幕開方向付勢力で開状態に保持されている。先幕係合部21dの移動は先幕係止部40aによりロックされているバウンスロック状態で変わらない。
(First curtain)
The front curtain 20d is held in the open state by the front curtain opening direction urging force. The movement of the front curtain engaging portion 21d does not change in the bounce lock state locked by the front curtain locking portion 40a.

(後幕)
後幕30dは後幕マグネット36の磁力で開状態が保持されるが、後幕チャージレバー52によっても開状態が保持されている。後幕係合部31dの移動は、後幕係止部41aによりロックされていないバウンスアンロック状態を維持している。
その後、不図示の駆動系が駆動され、回転部材50が正面から見て時計方向に回動を開始する。
(Second curtain)
The rear curtain 30d is held in the open state by the magnetic force of the rear curtain magnet 36, but the rear curtain 30d is also held in the open state by the rear curtain charge lever 52. The movement of the rear curtain engaging portion 31d maintains a bounce unlocked state that is not locked by the rear curtain locking portion 41a.
After that, a drive system (not shown) is driven, and the rotating member 50 starts rotating clockwise when viewed from the front.

(第2状態)
図5、図6は第1状態の次の第2状態を示す図である。図5は第2状態のシャッター機構3の正面図である。図6は第2状態のシャッター機構3の一部を示す図で、(a)は正面図、(b)は背面図である。
(Second state)
5 and 6 are diagrams showing a second state following the first state. FIG. 5 is a front view of the shutter mechanism 3 in the second state. 6A and 6B are views showing a part of the shutter mechanism 3 in the second state, where FIG. 6A is a front view and FIG. 6B is a rear view.

(先幕)
図5、図6(a)に示すように、回転部材50が正面から見て時計方向に回転すると、図6(a)に示すようにリセットカム50bが後幕解除ピン部41cを押し、後幕押さえレバー41が時計方向に回転する。
図6(b)に示すように、後幕連動ピン部41bが先幕連動部40bを押し、先幕押さえレバー40が回転する。先幕係止部40aは先幕係合部21dの回動軌跡外に退避し、先幕20dのバウンスロック解除動作が開始される。
図5に示すようにチャージカム50aが先幕カム当接部51bを押し、先幕チャージレバー51が回転を始めるが、先幕チャージ部51aはまだ先幕チャージピン23に当接していないので、先幕20dはまだ走行を開始しない。
(First curtain)
As shown in FIGS. 5 and 6A, when the rotating member 50 rotates clockwise when viewed from the front, the reset cam 50b pushes the rear curtain release pin portion 41c and rearward as shown in FIG. 6A. The curtain holding lever 41 rotates clockwise.
As shown in FIG. 6B, the rear curtain interlocking pin portion 41b pushes the front curtain interlocking portion 40b, and the front curtain holding lever 40 rotates. The front curtain locking portion 40a retracts out of the rotation locus of the front curtain engaging portion 21d, and the bounce lock release operation of the front curtain 20d is started.
As shown in FIG. 5, the charge cam 50a pushes the front curtain cam contact portion 51b, and the front curtain charge lever 51 starts rotating, but the front curtain charge portion 51a has not yet contacted the front curtain charge pin 23. The first curtain 20d has not started running yet.

(後幕)
図5に示すように後幕チャージレバー52の後幕カム当接部52bはチャージカム50aから外れ、不図示の付勢部材により不図示のストッパー部材により規制される位置まで回転する。しかし、後幕駆動レバー31は磁力で保持されているので、後幕30dは開いたままである。
(Second curtain)
As shown in FIG. 5, the rear curtain cam contact portion 52b of the rear curtain charge lever 52 disengages from the charge cam 50a and rotates to a position regulated by a stopper member (not shown) by an urging member (not shown). However, since the rear curtain drive lever 31 is held by a magnetic force, the rear curtain 30d remains open.

(第3状態)
図7、図8は第2状態の次の第3状態を示す図である。図7は第3状態のシャッター機構3の正面図である。図8は第3状態のシャッター機構3の一部を示す図で、(a)は正面図、(b)は背面図である。
(Third state)
7 and 8 are diagrams showing a third state following the second state. FIG. 7 is a front view of the shutter mechanism 3 in the third state. 8A and 8B are views showing a part of the shutter mechanism 3 in the third state, where FIG. 8A is a front view and FIG. 8B is a rear view.

(先幕)
図7、図8(a)に示すように回転部材50が、正面から見てさらに時計方向に回転すると、図8(a)に示すようにリセットカム50bが後幕解除ピン部41cを押し、後幕押さえレバー41が時計方向にさらに回転する。
図8(b)に示すように後幕連動ピン部41bが先幕連動部40bをさらに押し、先幕押さえレバー40がさらに回転し、先幕係止部40aが先幕係合部21dのさらに回動軌跡外に退避する。そして、先幕駆動レバー21の回動が阻害されない状態となって先幕20dのバウンスロックが完全に解除される。
(First curtain)
When the rotating member 50 further rotates clockwise when viewed from the front as shown in FIGS. 7 and 8A, the reset cam 50b pushes the rear curtain release pin portion 41c as shown in FIG. 8A. The rear curtain holding lever 41 further rotates clockwise.
As shown in FIG. 8B, the rear curtain interlocking pin portion 41b further pushes the front curtain interlocking portion 40b, the front curtain holding lever 40 further rotates, and the front curtain locking portion 40a further presses the front curtain engaging portion 21d. Evacuate outside the rotation locus. Then, the rotation of the front curtain drive lever 21 is not hindered, and the bounce lock of the front curtain 20d is completely released.

図7に示すようにチャージカム50aが先幕カム当接部51bを押し、先幕チャージレバー51が回転し、先幕チャージ部51aが先幕チャージピン23と当接し、先幕補助レバー22が、先幕開方向付勢力に抗して時計方向に回転する。
そして、先幕駆動レバー21と先幕補助レバー22と先幕チャージピン23と先幕補助バネ24が一体となって、正面から見て時計方向に先幕開方向付勢力に抗して回動し始めてチャージが開始され、先幕20dは畳まれた開状態から展開された閉状態に移行を開始する。
As shown in FIG. 7, the charge cam 50a pushes the front curtain cam contact portion 51b, the front curtain charge lever 51 rotates, the front curtain charge portion 51a contacts the front curtain charge pin 23, and the front curtain auxiliary lever 22 moves. , Rotates clockwise against the front curtain opening direction urging force.
Then, the front curtain drive lever 21, the front curtain auxiliary lever 22, the front curtain charge pin 23, and the front curtain auxiliary spring 24 are integrated and rotate clockwise against the front curtain opening direction urging force when viewed from the front. Charging is started for the first time, and the front curtain 20d starts the transition from the folded open state to the unfolded closed state.

チャージカム50aがさらに回転すると、先幕駆動レバー21は、先幕補助バネ24を介して回転し、先幕開閉アーム20e1,20e2を介して先幕20dを展開して、開口部100を覆う。先幕吸着部21aは、先幕吸着部26aに当接する位置に達する。 When the charge cam 50a further rotates, the front curtain drive lever 21 rotates via the front curtain auxiliary spring 24, deploys the front curtain 20d via the front curtain opening / closing arms 20e1 and 20e2, and covers the opening 100. The front curtain suction portion 21a reaches a position where it abuts on the front curtain suction portion 26a.

チャージカム50aがさらに回転すると、先幕駆動レバー21は、先幕吸着部21aが先幕吸着部26aに当接しているため回転しないが、先幕チャージピン23と先幕補助レバー22が回転するので、先幕補助バネ24がさらに撓んだ図7に示す状態となる。
そうすると、図8(b)に示すように先幕制限部22aは、先幕駆動レバー21から離れ、先幕吸着部21aは、先幕補助バネ24で発生する力で先幕バネ受け部21fを介して先幕吸着部26aに押し付けられる。この状態で先幕端子部26bに通電し、先幕駆動レバー21を先幕マグネット26でも保持する。
When the charge cam 50a further rotates, the front curtain drive lever 21 does not rotate because the front curtain suction portion 21a is in contact with the front curtain suction portion 26a, but the front curtain charge pin 23 and the front curtain auxiliary lever 22 rotate. Therefore, the front curtain auxiliary spring 24 is further bent to be in the state shown in FIG. 7.
Then, as shown in FIG. 8B, the front curtain limiting portion 22a is separated from the front curtain driving lever 21, and the front curtain suction portion 21a presses the front curtain spring receiving portion 21f by the force generated by the front curtain auxiliary spring 24. It is pressed against the front curtain suction portion 26a via the front curtain suction portion 26a. In this state, the front curtain terminal portion 26b is energized, and the front curtain drive lever 21 is also held by the front curtain magnet 26.

(後幕)
後幕チャージレバー52の後幕カム当接部52bは、一旦、チャージカム50aから外れるので、後幕チャージレバー52は、図7に点線で示すように、不図示の付勢部材により不図示のストッパー部材により規制される位置まで回転する。しかし、後幕駆動レバー31は磁力で保持されているので、後幕30dは開いたままである。
その後、後幕チャージレバー52は、チャージカム50aの回転に合わせて再度、時計方向に回転して後幕チャージピン33側に移動する。
(Second curtain)
Since the rear curtain cam contact portion 52b of the rear curtain charge lever 52 is once disengaged from the charge cam 50a, the rear curtain charge lever 52 is not shown by an urging member (not shown) as shown by the dotted line in FIG. It rotates to the position regulated by the stopper member. However, since the rear curtain drive lever 31 is held by a magnetic force, the rear curtain 30d remains open.
After that, the rear curtain charge lever 52 rotates clockwise again in accordance with the rotation of the charge cam 50a and moves to the rear curtain charge pin 33 side.

(第4状態)
図9は第3状態の次の第4状態を示す図である。図9は第4状態のシャッター機構3の一部を示す図で、(a)は正面図、(b)は背面図である。
(4th state)
FIG. 9 is a diagram showing a fourth state following the third state. 9A and 9B are views showing a part of the shutter mechanism 3 in the fourth state, where FIG. 9A is a front view and FIG. 9B is a rear view.

(先幕・後幕)
回転部材50が、正面から見てさらに時計方向に回転すると、図中点線で示すように先幕カム当接部51b及び後幕カム当接部52bがチャージカム50aから外れ、先幕チャージレバー51及び後幕チャージレバー52はそれぞれ不図示の付勢部材により不図示のストッパー部材により規制される位置まで、図中点線の矢印で示すように回転する。
先幕チャージ部51a及び後幕チャージ部52aはそれぞれ先幕チャージピン23及び後幕チャージピン33の回動軌跡外に移動する。先幕駆動レバー21及び後幕駆動レバー31は、先幕端子部26b及び後幕端子部36bが通電した状態で保たれているため、それぞれ先幕マグネット26及び後幕マグネット36に吸着保持された状態を保つ。
先幕20dは展開して開口部100を覆った状態、後幕30dは畳まれて開口部100を開放した状態を保つ。
図9(b)に示すように先幕制限部22a及び後幕制限部32aは、それぞれ先幕駆動レバー21及び後幕駆動レバー31に当接して、先幕駆動レバー21と先幕補助レバー22、及び、後幕駆動レバー31と後幕補助レバー32がそれぞれ一体化した状態となる。
(First curtain / second curtain)
When the rotating member 50 further rotates clockwise when viewed from the front, the front curtain cam contact portion 51b and the rear curtain cam contact portion 52b are disengaged from the charge cam 50a as shown by the dotted line in the figure, and the front curtain charge lever 51 The rear curtain charge lever 52 rotates to a position regulated by a stopper member (not shown) by an urging member (not shown) as shown by an arrow in the middle of the drawing.
The front curtain charge portion 51a and the rear curtain charge portion 52a move out of the rotation locus of the front curtain charge pin 23 and the rear curtain charge pin 33, respectively. Since the front curtain drive lever 21 and the rear curtain drive lever 31 are kept in a state where the front curtain terminal portion 26b and the rear curtain terminal portion 36b are energized, they are attracted and held by the front curtain magnet 26 and the rear curtain magnet 36, respectively. Keep in state.
The front curtain 20d is unfolded to cover the opening 100, and the rear curtain 30d is folded to keep the opening 100 open.
As shown in FIG. 9B, the front curtain limiting portion 22a and the rear curtain limiting portion 32a abut on the front curtain driving lever 21 and the rear curtain driving lever 31, respectively, and the front curtain driving lever 21 and the front curtain auxiliary lever 22. , And the rear curtain drive lever 31 and the rear curtain auxiliary lever 32 are integrated.

(第5状態)
図10、図11は第4状態の次の第5状態を示す図である。図10は第5状態のシャッター機構3の正面図である。図11は第5状態のシャッター機構3の一部を示す図で、(a)は正面図、(b)は背面図である。
(Fifth state)
10 and 11 are diagrams showing a fifth state following the fourth state. FIG. 10 is a front view of the shutter mechanism 3 in the fifth state. 11A and 11B are views showing a part of the shutter mechanism 3 in the fifth state, where FIG. 11A is a front view and FIG. 11B is a rear view.

(先幕)
先幕マグネット26の先幕端子部26bへの通電を停止すると、先幕吸着部26aの磁力が無くなる。そうすると、先幕駆動レバー21と先幕補助レバー22と先幕チャージピン23と先幕補助バネ24は一体となって、先幕開方向付勢力により、図10、図11(a)に示す反時計方向に回転する。先幕20dも展開された閉状態から畳まれた開状態に移行し、開口部100が上側から順次開放される。その結果、撮像素子2にも、上側から順次露光が開始される。
(First curtain)
When the energization of the front curtain terminal portion 26b of the front curtain magnet 26 is stopped, the magnetic force of the front curtain suction portion 26a disappears. Then, the front curtain drive lever 21, the front curtain auxiliary lever 22, the front curtain charge pin 23, and the front curtain auxiliary spring 24 are integrated, and the counterclockwise shown in FIGS. Rotate clockwise. The front curtain 20d also shifts from the unfolded closed state to the folded open state, and the opening 100 is sequentially opened from the upper side. As a result, the image sensor 2 is also sequentially exposed from the upper side.

先幕係止部40aは、先幕係合部21dの回動軌跡内にあるため、先幕補助レバー22が回転すると、先幕係合部21dの斜面部21daは、先幕係止部40aの斜面部40aaに当接する。
そうすると、斜面部21daは斜面部40aaを押して、先幕押さえレバー40を正面側から見て反時計方向に回転させて退避させるので、先幕駆動レバー21の回動は阻害されず、先幕係合部21dは先幕係止部40aを乗り越え、先幕駆動レバー21は回動していく。
Since the front curtain locking portion 40a is in the rotation locus of the front curtain engaging portion 21d, when the front curtain auxiliary lever 22 rotates, the slope portion 21da of the front curtain engaging portion 21d becomes the front curtain locking portion 40a. Abuts on the slope portion 40aa of.
Then, the slope portion 21da pushes the slope portion 40aa and rotates the front curtain holding lever 40 counterclockwise when viewed from the front side to retract it, so that the rotation of the front curtain drive lever 21 is not hindered and the front curtain clerk The joint portion 21d gets over the front curtain locking portion 40a, and the front curtain drive lever 21 rotates.

(後幕)
図11(b)に示すように先幕連動部40bは後幕連動ピン部41bから離れる方向に移動するので、先幕押さえレバー40の移動は後幕押さえレバー41に影響しない。
(Second curtain)
As shown in FIG. 11B, since the front curtain interlocking portion 40b moves in the direction away from the rear curtain interlocking pin portion 41b, the movement of the front curtain holding lever 40 does not affect the rear curtain holding lever 41.

(第6状態)
図12は第5状態の次の第6状態を示す図である。図12は第6状態のシャッター機構3の一部を示す図で、(a)は正面図、(b)は背面図である。
(6th state)
FIG. 12 is a diagram showing a sixth state following the fifth state. 12A and 12B are views showing a part of the shutter mechanism 3 in the sixth state, where FIG. 12A is a front view and FIG. 12B is a rear view.

先幕駆動レバー21が反時計方向に回転すると、図11に示すように、先幕第1当接部21Acが先幕第1緩衝部材25Aに衝突を開始する。しかし、先幕第2当接部21Bcは、まだ先幕第2緩衝部材25Bと当接していない。
そして、先幕駆動レバー21がさらに反時計方向に回転すると、先幕第1当接部21Acは、図12に示すように先幕第1緩衝部材25Aを弾性変形させて先幕駆動レバー21の駆動(回転)エネルギーを吸収し、先幕駆動レバー21の回動を停止させる方向に力が働き始める。
When the front curtain drive lever 21 rotates counterclockwise, as shown in FIG. 11, the front curtain first contact portion 21Ac starts to collide with the front curtain first cushioning member 25A. However, the front curtain second contact portion 21Bc has not yet come into contact with the front curtain second cushioning member 25B.
Then, when the front curtain drive lever 21 further rotates counterclockwise, the front curtain first contact portion 21Ac elastically deforms the front curtain first buffer member 25A as shown in FIG. 12, and the front curtain drive lever 21 The drive (rotation) energy is absorbed, and a force starts to act in the direction of stopping the rotation of the front curtain drive lever 21.

しかし、図12の時点において、先幕第2当接部21Bcは、まだ先幕第2緩衝部材25Bを弾性変形させていない。すなわち、先幕第2当接部21Bcと先幕第2緩衝部材25Bとの間に隙間があるか、先幕第2当接部21Bcと先幕第2緩衝部材25Bとは接触を開始したが、先幕第2当接部21Bcは先幕第2緩衝部材25Bをまだ押圧していない状態である。 However, at the time of FIG. 12, the front curtain second contact portion 21Bc has not yet elastically deformed the front curtain second cushioning member 25B. That is, there is a gap between the front curtain second contact portion 21Bc and the front curtain second cushioning member 25B, or the front curtain second contact portion 21Bc and the front curtain second cushioning member 25B have started contact. , The front curtain second contact portion 21Bc is in a state where the front curtain second cushioning member 25B has not yet been pressed.

このとき、先幕係合部21dは先幕係止部40aを越え、係止レバーバネ42の付勢力により先幕係止部40aが先幕係合部21dの回動軌跡内に入った位置まで先幕押さえレバー40が回動する。 At this time, the front curtain engaging portion 21d exceeds the front curtain locking portion 40a and reaches a position where the front curtain locking portion 40a enters the rotation locus of the front curtain engaging portion 21d due to the urging force of the locking lever spring 42. The front curtain holding lever 40 rotates.

(第7状態)
図13は第6状態の次の第7状態を示す図である。図13は第7状態のシャッター機構3の一部を示す図で、(a)は正面図、(b)は背面図である。
さらに先幕駆動レバー21が反時計方向に回転すると、先幕駆動レバー21は減速していくが、先幕駆動レバー21の回動が完全に停止する前であって先幕第1当接部21Acが先幕第1緩衝部材25Aを押圧して弾性変形させている途中で、先幕第2当接部21Bcが先幕第2緩衝部材25Bと衝突する。
(7th state)
FIG. 13 is a diagram showing a seventh state following the sixth state. 13A and 13B are views showing a part of the shutter mechanism 3 in the seventh state, where FIG. 13A is a front view and FIG. 13B is a rear view.
Further, when the front curtain drive lever 21 rotates counterclockwise, the front curtain drive lever 21 decelerates, but before the rotation of the front curtain drive lever 21 is completely stopped, the front curtain first contact portion While 21Ac presses the front curtain first cushioning member 25A to elastically deform it, the front curtain second contact portion 21Bc collides with the front curtain second cushioning member 25B.

先幕第2当接部21Bcが衝突すると、先幕第2緩衝部材25Bも弾性変形し、先幕駆動レバー21の駆動エネルギーを吸収し、先幕駆動レバー21の回動の停止を補助する。そして、先幕第1緩衝部材25Aと先幕第2緩衝部材25Bとの弾性変形によって、先幕駆動レバー21の回動が停止される。 When the front curtain second contact portion 21Bc collides, the front curtain second cushioning member 25B also elastically deforms, absorbs the driving energy of the front curtain drive lever 21, and assists in stopping the rotation of the front curtain drive lever 21. Then, the rotation of the front curtain drive lever 21 is stopped by the elastic deformation of the front curtain first cushioning member 25A and the front curtain second cushioning member 25B.

すなわち、先幕駆動レバー21の駆動エネルギーは、まず、先幕第1緩衝部材25Aによって吸収され始め、さらに先幕第2緩衝部材25Bも加わり2つの部材で吸収される。
このように、先幕20dの解放時の先幕駆動レバー21の回転を停止させる際の衝撃を防止する緩衝部材を2つ設けたので、先幕駆動レバー21の回転停止時の衝撃を2か所で且つ異なるタイミングで受け止めることができる。ゆえに、衝撃を分散させさらに吸収できるエネルギーも増加させることができ、先幕駆動レバー21の停止時に発生するカメラブレを効果的に軽減することができる。
That is, the driving energy of the front curtain drive lever 21 is first absorbed by the front curtain first buffer member 25A, and further, the front curtain second buffer member 25B is added and absorbed by the two members.
In this way, since two cushioning members are provided to prevent the impact when the rotation of the front curtain drive lever 21 is stopped when the front curtain 20d is released, the impact when the rotation of the front curtain drive lever 21 is stopped is two. It can be received at different times. Therefore, the impact can be dispersed and the energy that can be absorbed can be increased, and the camera shake that occurs when the front curtain drive lever 21 is stopped can be effectively reduced.

先幕駆動レバー21は、先幕第1当接部21Acと先幕第2緩衝部材25Bとの弾性変形の復元力によって停止した位置から反対方向(正面から見て時計方向)に回動する。
このとき、先幕駆動レバー21は戻されて逆回転する。この逆回転において、先幕第2緩衝部材25Bと先幕第2当接部21Bcとの間の接触が解除される。
そして、先幕第1緩衝部材25Aと先幕第1当接部21Acとの間の接触が維持されている状態で、先付勢部材からの駆動力と、先幕第1緩衝部材25Aの戻し力とが釣り合った位置で、先幕駆動レバーが静止する。
The front curtain drive lever 21 rotates in the opposite direction (clockwise when viewed from the front) from the stopped position due to the restoring force of the elastic deformation of the front curtain first contact portion 21Ac and the front curtain second cushioning member 25B.
At this time, the front curtain drive lever 21 is returned and rotates in the reverse direction. In this reverse rotation, the contact between the front curtain second buffer member 25B and the front curtain second contact portion 21Bc is released.
Then, while the contact between the front curtain first cushioning member 25A and the front curtain first contact portion 21Ac is maintained, the driving force from the front curtain urging member and the return of the front curtain first cushioning member 25A. The front curtain drive lever comes to rest at a position where the force is balanced.

このように、先幕第2緩衝部材25Bの先幕第2当接部21Bcによる変形は、先幕第1緩衝部材25Aの先幕第1当接部21Acによる変形とは異なり、変形時間が短く、一時的なものである。
一般的なゴム製の緩衝部材は、変形されている時間が長いと、変形が残る場合がある。そうすると、先幕第2当接部21Bcが同じ場所まで移動しても、先幕第2緩衝部材25Bに当接しなくなる。また、変形が残りにくいゴム製の緩衝部材は、劣化しにくい緩衝部材より高価である。
実施形態においては、先幕第2緩衝部材25Bの変形は一時的なものであるため、安価な部材で製造することができる。
As described above, the deformation of the front curtain second buffer member 25B by the front curtain second contact portion 21Bc is different from the deformation of the front curtain first buffer member 25A by the front curtain first contact portion 21Ac, and the deformation time is short. , Temporary.
A general rubber cushioning member may remain deformed if it is deformed for a long time. Then, even if the front curtain second contact portion 21Bc moves to the same place, it does not come into contact with the front curtain second buffer member 25B. Further, a rubber cushioning member that is less likely to remain deformed is more expensive than a cushioning member that is less likely to deteriorate.
In the embodiment, since the deformation of the front curtain second buffer member 25B is temporary, it can be manufactured with an inexpensive member.

また、先幕係止部40aは先幕係合部21dの回動軌跡内にあり、且つ相互の当接面となる平面部21dbと平面部40abとが先幕駆動レバー21の回動方向に対してほぼ垂直な面である。
このため、先幕駆動レバー21が、バウンスによって正面側から見たときに時計方向に回転しようとしても、先幕係合部21dは先幕係止部40aを乗り越えて回動することができず、先幕駆動レバー21の先幕係合部21dの回動が先幕係止部40aより内側に制限される。
この制限される位置は、先幕駆動レバー21が先幕係止部40aより内側にある場合、先幕20dは開口部100の領域外となる。したがって、先幕第1緩衝部材25Aの復元力により先幕20dが展開する方向に回動しても、先幕20dが開口部100を覆うことはない。
Further, the front curtain locking portion 40a is in the rotation locus of the front curtain engaging portion 21d, and the flat surface portion 21db and the flat surface portion 40ab, which are mutual contact surfaces, are in the rotation direction of the front curtain drive lever 21. It is a plane that is almost perpendicular to the plane.
Therefore, even if the front curtain drive lever 21 tries to rotate clockwise when viewed from the front side by bounce, the front curtain engaging portion 21d cannot rotate over the front curtain locking portion 40a. The rotation of the front curtain engaging portion 21d of the front curtain driving lever 21 is restricted to the inside of the front curtain locking portion 40a.
This restricted position is such that when the front curtain drive lever 21 is inside the front curtain locking portion 40a, the front curtain 20d is outside the region of the opening 100. Therefore, even if the front curtain 20d is rotated in the direction in which the front curtain 20d is deployed due to the restoring force of the front curtain first buffer member 25A, the front curtain 20d does not cover the opening 100.

(第8状態)
図14、図15は第7状態の次の第8状態を示す図である。図14は第8状態のシャッター機構3の正面図である。図15は第8状態のシャッター機構3の一部を示す図で、(a)は正面図、(b)は背面図である。
(8th state)
14 and 15 are diagrams showing the eighth state following the seventh state. FIG. 14 is a front view of the shutter mechanism 3 in the eighth state. 15A and 15B are views showing a part of the shutter mechanism 3 in the eighth state, where FIG. 15A is a front view and FIG. 15B is a rear view.

(後幕)
後幕マグネット36の後幕端子部36bへの通電を停止すると、後吸着部36aの磁力が無くなる。そうすると、図14に示すように後幕駆動レバー31と後幕補助レバー32と後幕チャージピン33と後幕補助バネ34とは一体となって、後幕閉方向付勢力により、正面から見て反時計方向に回転する。後幕30dも畳まれた開状態から展開された閉状態に移行し、開口部100が上側から順次閉鎖される。その結果、撮像素子2の露光は、上側から順次終了する。
(Second curtain)
When the energization of the rear curtain terminal portion 36b of the rear curtain magnet 36 is stopped, the magnetic force of the rear curtain portion 36a disappears. Then, as shown in FIG. 14, the rear curtain drive lever 31, the rear curtain auxiliary lever 32, the rear curtain charge pin 33, and the rear curtain auxiliary spring 34 are integrated and viewed from the front by the rear curtain closing direction urging force. Rotate counterclockwise. The rear curtain 30d also shifts from the folded open state to the unfolded closed state, and the opening 100 is sequentially closed from the upper side. As a result, the exposure of the image sensor 2 is sequentially completed from the upper side.

図15に示すように後幕係止部41aは後幕係合部31dの回動軌跡内にあるため、その回動によって後幕係合部31dが後幕係止部41aに当接する。
そうすると、後幕係合部31dの斜面部31daが、後幕係止部41aの斜面部41aaを押す。そうすると、後幕押さえレバー41を正面側から見て時計方向に回転して退避させるので、後幕駆動レバー31の回動は阻害されずに、後幕駆動レバー31の後幕係合部31dは後幕係止部41aを乗り越える。
As shown in FIG. 15, since the rear curtain locking portion 41a is in the rotation locus of the rear curtain engaging portion 31d, the rear curtain engaging portion 31d comes into contact with the rear curtain locking portion 41a due to the rotation.
Then, the slope portion 31da of the rear curtain engaging portion 31d pushes the slope portion 41a of the rear curtain locking portion 41a. Then, since the rear curtain holding lever 41 is rotated clockwise when viewed from the front side and retracted, the rotation of the rear curtain driving lever 31 is not hindered, and the rear curtain engaging portion 31d of the rear curtain driving lever 31 is moved. Overcome the rear curtain locking portion 41a.

(先幕)
図15(b)に示すように後幕連動ピン部41bは先幕連動部40bに近づく方向に移動するが、後幕連動ピン部41bと先幕連動部40bとの間の隙間は十分にあるので、後幕連動ピン部41bが先幕連動部40bに接触することは無く、後幕押さえレバー41の移動は先幕押さえレバー40に影響しない。
(First curtain)
As shown in FIG. 15B, the rear curtain interlocking pin portion 41b moves in a direction approaching the front curtain interlocking portion 40b, but there is a sufficient gap between the rear curtain interlocking pin portion 41b and the front curtain interlocking portion 40b. Therefore, the rear curtain interlocking pin portion 41b does not come into contact with the front curtain interlocking portion 40b, and the movement of the rear curtain pressing lever 41 does not affect the front curtain pressing lever 40.

(第9状態)
図16は第8状態の次の第9状態を示す図である。図16は第9状態のシャッター機構3の一部を示す図で、(a)は正面図、(b)は背面図である。
(9th state)
FIG. 16 is a diagram showing a ninth state following the eighth state. 16A and 16B are views showing a part of the shutter mechanism 3 in the ninth state, where FIG. 16A is a front view and FIG. 16B is a rear view.

(後幕)
後幕閉方向付勢力により後幕駆動レバー31がさらに回動すると、後幕当接部31cが後幕緩衝部材35を弾性変形させる。そして後幕当接部31cに後幕閉方向付勢力と逆方向の力が作用し、後幕駆動レバー31は減速し、後幕緩衝部材35が所定量変形したところで後幕駆動レバー31は停止する。
このとき、後幕係合部31dは後幕係止部41aを越えており、係止レバーバネ42の付勢力により後幕係止部41aが、後幕係合部31dの回動軌跡内に入った位置まで後幕押さえレバー41が回動する。
(Second curtain)
When the rear curtain drive lever 31 is further rotated by the rear curtain closing direction urging force, the rear curtain contact portion 31c elastically deforms the rear curtain cushioning member 35. Then, a force in the direction opposite to the rear curtain closing direction urging force acts on the rear curtain contact portion 31c, the rear curtain drive lever 31 decelerates, and the rear curtain drive lever 31 stops when the rear curtain buffer member 35 is deformed by a predetermined amount. To do.
At this time, the rear curtain engaging portion 31d exceeds the rear curtain locking portion 41a, and the rear curtain locking portion 41a enters the rotation locus of the rear curtain engaging portion 31d due to the urging force of the locking lever spring 42. The rear curtain holding lever 41 rotates to the above position.

後幕駆動レバー31は、後幕緩衝部材35の復元力により停止した位置から反対方向(正面から見て時計方向)に回動する。そうすると、後幕係合部31dの平面部31dbが後幕係止部41aの平面部41abと当接して、後幕駆動レバー31の回転範囲を制限する。この制限される位置は、後幕30dが開口部100を覆った位置となっている。したがって後幕緩衝部材35の復元力により後幕30dが畳まれる方向に回動しても、開口部100を開放することはない。
この状態で露光動作を終了する。そして、撮像素子2より画像データを読み出した後、次の動作に移る。
The rear curtain drive lever 31 rotates in the opposite direction (clockwise when viewed from the front) from the stopped position due to the restoring force of the rear curtain buffer member 35. Then, the flat surface portion 31db of the rear curtain engaging portion 31d comes into contact with the flat surface portion 41ab of the rear curtain locking portion 41a, and the rotation range of the rear curtain drive lever 31 is limited. This restricted position is a position where the rear curtain 30d covers the opening 100. Therefore, even if the rear curtain 30d is rotated in the folding direction by the restoring force of the rear curtain buffer member 35, the opening 100 is not opened.
The exposure operation ends in this state. Then, after reading the image data from the image sensor 2, the next operation is performed.

(第10状態)
図17は第8の状態の次の第10状態を示す図である。図17は第10状態のシャッター機構3の一部を示す図で、(a)は正面図、(b)は背面図である。
(10th state)
FIG. 17 is a diagram showing a tenth state following the eighth state. 17A and 17B are views showing a part of the shutter mechanism 3 in the tenth state, where FIG. 17A is a front view and FIG. 17B is a rear view.

(後幕)
図17(a)に示すように、回転部材50が正面から見てさらに時計方向に回転すると、リセットカム50bが後幕解除ピン部41cを押し、後幕押さえレバー41が回転する。そうすると、後幕係止部41aが後幕係合部31dの回動軌跡外に退避する。
(Second curtain)
As shown in FIG. 17A, when the rotating member 50 is further rotated clockwise when viewed from the front, the reset cam 50b pushes the rear curtain release pin portion 41c, and the rear curtain holding lever 41 rotates. Then, the rear curtain locking portion 41a retracts out of the rotation locus of the rear curtain engaging portion 31d.

(先幕)
図17(b)に示すように後幕連動ピン部41bが先幕連動部40bを押し、先幕押さえレバー40が回転し、先幕係止部40aが先幕係合部21dの回動軌跡外に退避する。
図17(a)に示すように回転部材50が正面から見てさらに時計方向に回転すると、点線で示すようにチャージカム50aが先幕カム当接部51bを押し、先幕チャージレバー51が回転し、先幕チャージ部51aが先幕チャージピン23に当接する。
そうすると、先幕駆動レバー21と先幕補助レバー22と先幕チャージピン23と先幕補助バネ24とが一体となって正面から見て時計方向に先幕開方向付勢力に抗して回動し始める。先幕20dも畳まれた開状態から展開された閉状態に移行を開始する。
このとき、先幕係止部40aは先幕係合部21dの回動軌跡外にあるため、先幕駆動レバー21の回動は阻害されない。
(First curtain)
As shown in FIG. 17B, the rear curtain interlocking pin portion 41b pushes the front curtain interlocking portion 40b, the front curtain holding lever 40 rotates, and the front curtain locking portion 40a rotates the front curtain engaging portion 21d. Evacuate outside.
When the rotating member 50 is further rotated clockwise when viewed from the front as shown in FIG. 17A, the charge cam 50a pushes the front curtain cam contact portion 51b and the front curtain charge lever 51 rotates as shown by the dotted line. Then, the front curtain charge portion 51a comes into contact with the front curtain charge pin 23.
Then, the front curtain drive lever 21, the front curtain auxiliary lever 22, the front curtain charge pin 23, and the front curtain auxiliary spring 24 are integrated and rotate clockwise against the front curtain opening direction urging force when viewed from the front. Begin to. The front curtain 20d also starts the transition from the folded open state to the unfolded closed state.
At this time, since the front curtain locking portion 40a is outside the rotation locus of the front curtain engaging portion 21d, the rotation of the front curtain drive lever 21 is not hindered.

(第11状態)
図18、図19は第9の状態の次の第11状態を示す図である。図18は第11状態のシャッター機構3の正面図である。図19は第11状態のシャッター機構3の一部を示す図で、(a)は正面図、(b)は背面図である。
(11th state)
18 and 19 are diagrams showing the eleventh state following the ninth state. FIG. 18 is a front view of the shutter mechanism 3 in the eleventh state. 19A and 19B are views showing a part of the shutter mechanism 3 in the eleventh state, where FIG. 19A is a front view and FIG. 19B is a rear view.

(先幕)
図18に示すように回転部材50が、正面から見てさらに時計方向に回転すると、先幕チャージレバー51及び先幕チャージピン23を介して先幕補助レバー22が先幕開方向付勢力に抗して回転する。
図19(a)に示すように、先幕駆動レバー21は、先幕補助バネ24を介して回転し、先幕吸着部21aは、先幕吸着部26aに当接する位置に達する。そうすると、図18に示すように、先幕20dは、先幕駆動レバー21の回転に合わせて展開し、開口部100を覆っていく。
(First curtain)
As shown in FIG. 18, when the rotating member 50 further rotates clockwise when viewed from the front, the front curtain auxiliary lever 22 resists the front curtain opening direction urging force via the front curtain charge lever 51 and the front curtain charge pin 23. And rotate.
As shown in FIG. 19A, the front curtain drive lever 21 rotates via the front curtain auxiliary spring 24, and the front curtain suction portion 21a reaches a position where it comes into contact with the front curtain suction portion 26a. Then, as shown in FIG. 18, the front curtain 20d expands in accordance with the rotation of the front curtain drive lever 21 and covers the opening 100.

(後幕)
チャージカム50aが後幕カム当接部52bをさらに押し、後幕チャージレバー52が回転する。そうすると、後幕チャージ部52aが後幕チャージピン33に当接し、後幕駆動レバー31と後幕補助レバー32と後幕チャージピン33と後幕補助バネ34とが一体となって正面から見て時計方向に後幕閉方向付勢力に抗して回動し始める。後幕30dは、展開された閉状態から畳まれた開状態に移行を開始する。このとき、後幕30dは開口部100を開放し始めるが、先幕20dがその開放した領域を覆っているため、開口部100は開放されず、撮像素子2は遮光された状態である。
図19に示すように、後幕解除ピン部41cはリセットカム50bの最大径部分に当接している。後幕係止部41aは後幕係合部31dの回動軌跡外にあるため、後幕駆動レバー31の回動は阻害されない。
(Second curtain)
The charge cam 50a further pushes the rear curtain cam contact portion 52b, and the rear curtain charge lever 52 rotates. Then, the rear curtain charge portion 52a comes into contact with the rear curtain charge pin 33, and the rear curtain drive lever 31, the rear curtain auxiliary lever 32, the rear curtain charge pin 33, and the rear curtain auxiliary spring 34 are integrated and viewed from the front. It begins to rotate clockwise against the rear curtain closing direction urging force. The rear curtain 30d starts the transition from the unfolded closed state to the folded open state. At this time, the rear curtain 30d starts to open the opening 100, but since the front curtain 20d covers the opened area, the opening 100 is not opened and the image sensor 2 is in a light-shielded state.
As shown in FIG. 19, the rear curtain release pin portion 41c is in contact with the maximum diameter portion of the reset cam 50b. Since the rear curtain locking portion 41a is outside the rotation locus of the rear curtain engaging portion 31d, the rotation of the rear curtain drive lever 31 is not hindered.

(第12状態)
図20、図21は第11状態の次の第12状態を示す図である。図20は第12状態のシャッター機構3の正面図である。図21は第12状態のシャッター機構3の一部を示す図で、(a)は正面図、(b)は背面図である。
(12th state)
20 and 21 are diagrams showing the twelfth state following the eleventh state. FIG. 20 is a front view of the shutter mechanism 3 in the twelfth state. 21 is a view showing a part of the shutter mechanism 3 in the twelfth state, where FIG. 21A is a front view and FIG. 21B is a rear view.

(後幕)
回転部材50が、正面から見てさらに時計方向に回転すると、図20に示すように幕チャージレバー52は回転部材50の回転により回転する。
後幕補助レバー32は、後幕チャージレバー52、後幕チャージピン33を介して後幕閉方向付勢力に抗して回転する。
後幕30dは、後幕駆動レバー31の回転に合わせて畳まれて、開口部100が開放された状態となる。しかし、先幕20dが開口部100を覆った位置にあり、撮像素子2は遮光された状態である。
後幕駆動レバー31は、後幕補助バネ34を介して回転し、後幕吸着部31aは、後吸着部36aに当接する位置に達する。
(Second curtain)
When the rotating member 50 is further rotated clockwise when viewed from the front, the curtain charge lever 52 is rotated by the rotation of the rotating member 50 as shown in FIG.
The rear curtain auxiliary lever 32 rotates against the rear curtain closing direction urging force via the rear curtain charge lever 52 and the rear curtain charge pin 33.
The rear curtain 30d is folded in accordance with the rotation of the rear curtain drive lever 31, and the opening 100 is opened. However, the front curtain 20d is in a position covering the opening 100, and the image sensor 2 is in a light-shielded state.
The rear curtain drive lever 31 rotates via the rear curtain auxiliary spring 34, and the rear curtain suction portion 31a reaches a position where it comes into contact with the rear curtain suction portion 36a.

(先幕)
先幕チャージレバー51及び先幕チャージピン23を介して先幕補助レバー22は先幕開方向付勢力に抗して回転する。
先幕駆動レバー21は、先幕吸着部21aが先幕吸着部26aに当接しているため回転しないが、先幕チャージピン23と先幕補助レバー22が回転するので、先幕補助バネ24が撓む。
先幕制限部22aが先幕駆動レバー21から離れ、先幕吸着部21aは、先幕補助バネ24で発生する力で先幕バネ受け部21fを介して先幕吸着部26aに押し付けられる。この状態で先幕端子部26bに通電し、先幕駆動レバー21を先幕マグネット26でも保持する。
(First curtain)
The front curtain auxiliary lever 22 rotates against the front curtain opening direction urging force via the front curtain charge lever 51 and the front curtain charge pin 23.
The front curtain drive lever 21 does not rotate because the front curtain suction portion 21a is in contact with the front curtain suction portion 26a, but the front curtain auxiliary spring 24 rotates because the front curtain charge pin 23 and the front curtain auxiliary lever 22 rotate. Bend.
The front curtain limiting portion 22a is separated from the front curtain driving lever 21, and the front curtain suction portion 21a is pressed against the front curtain suction portion 26a via the front curtain spring receiving portion 21f by the force generated by the front curtain auxiliary spring 24. In this state, the front curtain terminal portion 26b is energized, and the front curtain drive lever 21 is also held by the front curtain magnet 26.

(第13状態)
図22は第12状態の次の第13状態を示す図である。図22は第13状態のシャッター機構3の一部を示す図で、(a)は正面図、(b)は背面図である。
(13th state)
FIG. 22 is a diagram showing a thirteenth state following the twelfth state. 22 is a view showing a part of the shutter mechanism 3 in the thirteenth state, where FIG. 22A is a front view and FIG. 22B is a rear view.

(先幕)
図22(a)に点線で示すカム当接部51bは、チャージカム50aから外れ、先幕チャージレバー51は図中点線で示すように不図示の付勢部材により不図示のストッパー部材により規制される位置まで回転する。
その結果、先幕チャージ部51aは先幕チャージピン23の回動軌跡外に移動する。先幕駆動レバー21は先幕端子部26bに通電した状態を保つことにより、先幕マグネット26に吸着保持された状態を保つ。先幕20dは展開して開口部100を覆った状態を保つ。
図22(b)に示すように先幕制限部22aは先幕駆動レバー21に当接して、先幕駆動レバー21と先幕補助レバー22が一体化した状態となる。
回転部材50が、正面から見てさらに時計方向に回転すると、後幕補助レバー32が後幕チャージレバー52及び後幕チャージピン33を介して後幕閉方向付勢力に抗して回転する。
(First curtain)
The cam contact portion 51b shown by the dotted line in FIG. 22A is detached from the charge cam 50a, and the front curtain charge lever 51 is regulated by a stopper member (not shown) by an urging member (not shown) as shown by a dotted line in the figure. Rotate to the desired position.
As a result, the front curtain charge unit 51a moves out of the rotation locus of the front curtain charge pin 23. The front curtain drive lever 21 keeps the state of being attracted and held by the front curtain magnet 26 by keeping the state of energizing the front curtain terminal portion 26b. The front curtain 20d is unfolded to keep the opening 100 covered.
As shown in FIG. 22B, the front curtain limiting portion 22a comes into contact with the front curtain drive lever 21, and the front curtain drive lever 21 and the front curtain auxiliary lever 22 are integrated.
When the rotating member 50 further rotates clockwise when viewed from the front, the rear curtain auxiliary lever 32 rotates against the rear curtain closing direction urging force via the rear curtain charge lever 52 and the rear curtain charge pin 33.

(後幕)
後幕駆動レバー31は後幕吸着部31aが後吸着部36aに当接しているため回転しないが、後幕チャージピン33と後幕補助レバー32が回転するので、後幕補助バネ34が撓む。
後幕制限部32aは、後幕駆動レバー31から離れて、後幕補助バネ34で発生する力で後幕バネ受け部31fを介して後幕吸着部31aが後吸着部36aに押し付けられる。この状態で後幕端子部36bに通電し、後幕駆動レバー31を後幕マグネット36でも保持する状態とする。
以後、次の撮影を行う場合には、回転部材50を駆動して第4状態とし、第4状態以降の動作を繰り返す。
また、撮影を終了する場合には、先幕端子部26b、後幕端子部36bの通電を停止させる。
(Second curtain)
The rear curtain drive lever 31 does not rotate because the rear curtain suction portion 31a is in contact with the rear curtain suction portion 36a, but the rear curtain auxiliary spring 34 bends because the rear curtain charge pin 33 and the rear curtain auxiliary lever 32 rotate. ..
The rear curtain limiting portion 32a is separated from the rear curtain drive lever 31, and the rear curtain suction portion 31a is pressed against the rear curtain suction portion 36a via the rear curtain spring receiving portion 31f by the force generated by the rear curtain auxiliary spring 34. In this state, the rear curtain terminal portion 36b is energized, and the rear curtain drive lever 31 is also held by the rear curtain magnet 36.
After that, when the next shooting is performed, the rotating member 50 is driven to the fourth state, and the operations after the fourth state are repeated.
When the shooting is finished, the energization of the front curtain terminal portion 26b and the rear curtain terminal portion 36b is stopped.

後幕駆動レバー31と後幕補助レバー32と後幕チャージピン33と後幕補助バネ34とは、後幕カム当接部52bがチャージカム50aの最大半径部に当接した状態のため、後幕チャージ部52aが後幕チャージピン33を押えた状態のままで保持される。 The rear curtain drive lever 31, the rear curtain auxiliary lever 32, the rear curtain charge pin 33, and the rear curtain auxiliary spring 34 are in a state where the rear curtain cam contact portion 52b is in contact with the maximum radius portion of the charge cam 50a. The curtain charge portion 52a is held in a state where the rear curtain charge pin 33 is held down.

以上説明したように、実施形態のシャッター機構3は、先幕を走行させる先幕駆動レバー21と、後幕を走行させる後幕駆動レバー31と、先幕走行完了時に、先幕駆動レバー21のバウンドを押さえる先幕押さえレバー40と、後幕走行完了時に、後幕駆動レバー31のバウンドを押さえる後幕押さえレバー41と、先幕押さえレバー40及び後幕押さえレバー41を駆動するリセットカム50bと、を備える。
そして、先幕押さえレバー40及び後幕押さえレバー41は、図4(a)に示すように、先幕駆動レバー21の軸102a及び後幕駆動レバー31の軸101aと、リセットカム50bの軸103との間の領域に配置されている。
より詳細には、先幕押さえレバー40及び後幕押さえレバー41は軸102aと軸101aとを結ぶ直線L1と軸103を通り且つ直線L1と平行な直線L2との間に配置されている。
As described above, the shutter mechanism 3 of the embodiment includes a front curtain drive lever 21 for traveling the front curtain, a rear curtain drive lever 31 for traveling the rear curtain, and a front curtain drive lever 21 when the front curtain travel is completed. The front curtain holding lever 40 that holds the bounce, the rear curtain holding lever 41 that holds the bounce of the rear curtain drive lever 31 when the rear curtain running is completed, and the reset cam 50b that drives the front curtain holding lever 40 and the rear curtain holding lever 41. , Equipped with.
Then, as shown in FIG. 4A, the front curtain holding lever 40 and the rear curtain holding lever 41 include the shaft 102a of the front curtain driving lever 21 and the shaft 101a of the rear curtain driving lever 31, and the shaft 103 of the reset cam 50b. It is located in the area between and.
More specifically, the front curtain holding lever 40 and the rear curtain holding lever 41 are arranged between the straight line L1 connecting the shaft 102a and the shaft 101a and the straight line L2 passing through the shaft 103 and parallel to the straight line L1.

したがって、先幕20d及び後幕30dのバウンスを防止するための機構が他の領域に配置されている場合に比べて、余分なスペースを必要とせず、シャッター機構3をコンパクトにすることができる。 Therefore, the shutter mechanism 3 can be made compact without requiring an extra space as compared with the case where the mechanism for preventing the bounce of the front curtain 20d and the rear curtain 30d is arranged in another area.

リセットカム50b及びチャージカム50aは、同一の回転部材50に形成され、リセットカム50bは、先幕押さえレバー40及び後幕押さえレバー41の少なくとも一方(実施形態では後幕押さえレバー41)を直接駆動する。 The reset cam 50b and the charge cam 50a are formed on the same rotating member 50, and the reset cam 50b directly drives at least one of the front curtain holding lever 40 and the rear curtain holding lever 41 (rear curtain holding lever 41 in the embodiment). To do.

リセットカム50bは、先幕押さえレバー40及び後幕押さえレバー41の一方を直接駆動し、リセットカム50bに直接駆動される部材が他方の部材(実施形態では先幕押さえレバー40)を直接駆動する。 The reset cam 50b directly drives one of the front curtain holding lever 40 and the rear curtain holding lever 41, and the member directly driven by the reset cam 50b directly drives the other member (the front curtain holding lever 40 in the embodiment). ..

したがって、リセットカム50bのみで、先幕押さえレバー40及び後幕押さえレバー41の両方を駆動可能である。ゆえに、部品点数を減少することができる。 Therefore, both the front curtain holding lever 40 and the rear curtain holding lever 41 can be driven only by the reset cam 50b. Therefore, the number of parts can be reduced.

また、実施形態のシャッター機構3は、先幕駆動レバー21を駆動して先幕をチャージする先幕チャージレバー51と、後幕駆動レバー31を駆動して後幕をチャージする後幕チャージレバー52と、先幕チャージレバー51及び後幕チャージレバー52を駆動するチャージカム50aと、を備える。
また、チャージカム50aは、先幕チャージレバー51及び後幕チャージレバー52の少なくとも一方を直接駆動し、リセットカム50bと、チャージカム50aとは、同一の回転部材50の軸103方向の異なる高さに形成されている。
Further, the shutter mechanism 3 of the embodiment has a front curtain charge lever 51 that drives the front curtain drive lever 21 to charge the front curtain, and a rear curtain charge lever 52 that drives the rear curtain drive lever 31 to charge the rear curtain. And a charge cam 50a for driving the front curtain charge lever 51 and the rear curtain charge lever 52.
Further, the charge cam 50a directly drives at least one of the front curtain charge lever 51 and the rear curtain charge lever 52, and the reset cam 50b and the charge cam 50a have different heights of the same rotating member 50 in the axis 103 direction. Is formed in.

回転部材50における、回転部材50の軸103の延びる方向の異なる位置にリセットカム50bとチャージカム50aとを設けた。チャージカム50aは先幕カム当接部51b及び後幕カム当接部52bを駆動し、リセットカム50bは後幕押さえレバー41を駆動する。このように、一つの回転部材50で2つのカムを形成するしたためスペース効率がよく、コンパクト化が可能で、部品点数を減少することもできる。 The reset cam 50b and the charge cam 50a are provided at different positions in the rotating member 50 in the extending direction of the shaft 103 of the rotating member 50. The charge cam 50a drives the front curtain cam contact portion 51b and the rear curtain cam contact portion 52b, and the reset cam 50b drives the rear curtain holding lever 41. In this way, since two cams are formed by one rotating member 50, space efficiency is good, compactness is possible, and the number of parts can be reduced.

さらに、リセットカム50bとチャージカム50aとが形成された回転部材が一方向に回転することにより、先幕押さえレバー40及び後幕押さえレバー41の駆動、及び、先幕チャージレバー51及び後幕チャージレバー52の少なくとも一方の駆動が行われる。
チャージカム50aとリセットカム50bとの形状や当接位置を変えることにより、一つの回転部材50で、それぞれが当接する先幕カム当接部51b及び後幕カム当接部52bの駆動を時間差で行うことができる。
Further, the rotating member formed with the reset cam 50b and the charge cam 50a rotates in one direction to drive the front curtain holding lever 40 and the rear curtain holding lever 41, and the front curtain charge lever 51 and the rear curtain charge. At least one of the levers 52 is driven.
By changing the shape and contact position of the charge cam 50a and the reset cam 50b, one rotating member 50 can drive the front curtain cam contact portion 51b and the rear curtain cam contact portion 52b, which are in contact with each other, with a time lag. It can be carried out.

1:カメラ本体、1A:カメラ、3:シャッター機構、
20:先幕ユニット、20a:先幕結合穴部、20b:先幕第1軸穴部、20c:先幕第2軸穴部、20d:先幕、20e:先幕開閉アーム、20e1:先幕開閉アーム、20e2:先幕開閉アーム、
21:先幕駆動レバー、21a:先幕吸着部、21b:先幕結合ピン部、21Ac:先幕第1当接部、21Bc:先幕第2当接部、21d:先幕係合部、21e:先幕バネ軸部、21f:先幕バネ受け部、21g:先幕軸穴部、
22:先幕補助レバー、22a:先幕制限部、
23:先幕チャージピン、
24:先幕補助バネ、24a:先幕コイル部、24b:先幕フック部、
25A:先幕第1緩衝部材、
25B:先幕第2緩衝部材、
26:先幕マグネット、26a:先幕吸着部、26b:先幕端子部、
30:後幕ユニット、30a:後幕結合穴部、30b:後幕第1軸穴部、30c:後幕第2軸穴部、30d:後幕30de:後幕開閉アーム、30e1:後幕開閉アーム、30e2:後幕開閉アーム、
31:後幕駆動レバー、31a:後幕吸着部、31b:後幕結合ピン部、31c:後幕当接部、31d:後幕係合部、31e:後幕バネ軸部、31f:後幕バネ受け部、31g:後幕軸穴部、
32:後幕補助レバー、32a:後幕制限部、
33:後幕チャージピン、
34:後幕補助バネ、34a:後幕コイル部、34b:後幕フック部、
35:後幕緩衝部材、
36:後幕マグネット、36a:後吸着部、36b:後幕端子部、
40:先幕押さえレバー、40a:先幕係止部、40b:先幕連動部、40c:先幕軸穴部、40d:先幕バネ付勢部40e:先幕バネ付勢部、
41:後幕押さえレバー4、41a:後幕係止部、41b:後幕連動ピン部、41c:後幕解除ピン部、41d:後幕軸穴部、41e:後幕バネ付勢部、
42:係止レバーバネ、
50:回転部材、50a:チャージカム、50b:リセットカム、50c:駆動ギヤ部、50d:軸穴部、
51:先幕チャージレバー、51a:先幕チャージ部、51b:先幕カム当接部、51c:先幕軸穴部、
52:後幕チャージレバー、52a:後幕チャージ部、52b:後幕カム当接部、52c:軸穴部、
100:開口部、101a:軸、102a:軸、103:軸、
200:先幕駆動機構、
300:後幕駆動機構
1: Camera body, 1A: Camera, 3: Shutter mechanism,
20: Front curtain unit, 20a: Front curtain joint hole, 20b: Front curtain first shaft hole, 20c: Front curtain second shaft hole, 20d: Front curtain, 20e: Front curtain opening / closing arm, 20e1: Front curtain Open / close arm, 20e2: Front curtain open / close arm,
21: Front curtain drive lever, 21a: Front curtain suction part, 21b: Front curtain coupling pin part, 21Ac: Front curtain first contact part, 21Bc: Front curtain second contact part, 21d: Front curtain engagement part, 21e: Front curtain spring shaft, 21f: Front curtain spring receiving, 21g: Front curtain shaft hole,
22: Front curtain auxiliary lever, 22a: Front curtain restriction part,
23: Front curtain charge pin,
24: Front curtain auxiliary spring, 24a: Front curtain coil, 24b: Front curtain hook,
25A: First curtain first cushioning member,
25B: Front curtain second cushioning member,
26: Front curtain magnet, 26a: Front curtain suction part, 26b: Front curtain terminal part,
30: Rear curtain unit, 30a: Rear curtain joint hole, 30b: Rear curtain first shaft hole, 30c: Rear curtain second shaft hole, 30d: Rear curtain 30de: Rear curtain opening / closing arm, 30e1: Rear curtain opening / closing Arm, 30e2: Rear curtain opening and closing arm,
31: Rear curtain drive lever, 31a: Rear curtain suction part, 31b: Rear curtain coupling pin part, 31c: Rear curtain contact part, 31d: Rear curtain engaging part, 31e: Rear curtain spring shaft part, 31f: Rear curtain Spring receiving part, 31g: Rear curtain shaft hole part,
32: Rear curtain auxiliary lever, 32a: Rear curtain restriction part,
33: Rear curtain charge pin,
34: Rear curtain auxiliary spring, 34a: Rear curtain coil, 34b: Rear curtain hook,
35: Rear curtain cushioning member,
36: Rear curtain magnet, 36a: Rear suction part, 36b: Rear curtain terminal part,
40: Front curtain holding lever, 40a: Front curtain locking part, 40b: Front curtain interlocking part, 40c: Front curtain shaft hole part, 40d: Front curtain spring urging part 40e: Front curtain spring urging part,
41: Rear curtain holding lever 4, 41a: Rear curtain locking part, 41b: Rear curtain interlocking pin part, 41c: Rear curtain release pin part, 41d: Rear curtain shaft hole part, 41e: Rear curtain spring urging part,
42: Locking lever spring,
50: Rotating member, 50a: Charge cam, 50b: Reset cam, 50c: Drive gear part, 50d: Shaft hole part,
51: Front curtain charge lever, 51a: Front curtain charge part, 51b: Front curtain cam contact part, 51c: Front curtain shaft hole part,
52: Rear curtain charge lever, 52a: Rear curtain charge portion, 52b: Rear curtain cam contact portion, 52c: Shaft hole portion,
100: opening, 101a: shaft, 102a: shaft, 103: shaft,
200: Front curtain drive mechanism,
300: Rear curtain drive mechanism

Claims (8)

先幕を走行させる先幕駆動部材と、
後幕を走行させる後幕駆動部材と、
前記先幕駆動部材と当接する先幕当接部材と、
前記後幕駆動部材と当接する後幕当接部材と、
前記先幕当接部材と当接することによる前記先幕駆動部材のバウンドを押さえる先幕押さえ部材と、
前記後幕当接部材と当接することによる前記後幕駆動部材のバウンドを押さえる後幕押さえ部材と、
前記先幕押さえ部材及び後幕押さえ部材を駆動するリセットカムと、を備え、
前記先幕押さえ部材及び後幕押さえ部材は、前記先幕駆動部材及び前記後幕駆動部材の軸と、前記リセットカムの軸との間の領域に配置された
ことを特徴とするシャッター機構。
The front curtain drive member that runs the front curtain,
The rear curtain drive member that runs the rear curtain,
The front curtain contact member that comes into contact with the front curtain drive member,
The rear curtain contact member that comes into contact with the rear curtain drive member,
A front curtain holding member that suppresses the bounce of the front curtain driving member by contacting the front curtain contact member,
A rear curtain pressing member that suppresses the bounce of the rear curtain driving member by contacting the rear curtain contact member,
A reset cam for driving the front curtain holding member and the rear curtain holding member is provided.
The shutter mechanism is characterized in that the front curtain pressing member and the rear curtain pressing member are arranged in a region between the shafts of the front curtain driving member and the rear curtain driving member and the shaft of the reset cam.
請求項1に記載のシャッター機構であって、
前記リセットカム及びチャージカムは、同一の回転部材に形成され、
前記リセットカムは、前記先幕押さえ部材及び前記後幕押さえ部材の少なくとも一方を直接駆動する
ことを特徴とするシャッター機構。
The shutter mechanism according to claim 1.
The reset cam and the charge cam are formed on the same rotating member, and the reset cam and the charge cam are formed on the same rotating member.
The reset cam is a shutter mechanism that directly drives at least one of the front curtain pressing member and the rear curtain pressing member.
請求項2に記載のシャッター機構であって、
前記リセットカムは、前記先幕押さえ部材及び前記後幕押さえ部材の一方を直接駆動し、前記リセットカムに直接駆動される部材が他方の部材を直接駆動する
ことを特徴とするシャッター機構。
The shutter mechanism according to claim 2.
The reset cam is a shutter mechanism characterized in that one of the front curtain pressing member and the rear curtain pressing member is directly driven, and the member directly driven by the reset cam directly drives the other member.
請求項3に記載のシャッター機構であって、
前記先幕駆動部材を駆動して前記先幕をチャージする先幕チャージ部材と、
前記後幕駆動部材を駆動して前記後幕をチャージする後幕チャージ部材と、
前記先幕チャージ部材及び前記後幕チャージ部材を駆動するチャージカムと、を備え、
前記チャージカムは、前記先幕チャージ部材及び前記後幕チャージ部材の少なくとも一方を直接駆動し、
前記リセットカムと、前記チャージカムとは、同一の回転部材の軸方向の異なる高さに形成された
ことを特徴とするシャッター機構。
The shutter mechanism according to claim 3.
A front curtain charging member that drives the front curtain driving member to charge the front curtain,
A rear curtain charging member that drives the rear curtain driving member to charge the rear curtain,
A charge cam for driving the front curtain charge member and the rear curtain charge member is provided.
The charge cam directly drives at least one of the front curtain charge member and the rear curtain charge member.
The shutter mechanism is characterized in that the reset cam and the charge cam are formed at different heights in the axial direction of the same rotating member.
請求項4に記載のシャッター機構であって、
前記リセットカムと前記チャージカムとが形成された前記回転部材が一方向に回転することにより、前記先幕押さえ部材及び後幕押さえ部材の駆動、及び、前記先幕チャージ部材及び前記後幕チャージ部材の少なくとも一方の駆動が行われる
ことを特徴とするシャッター機構。
The shutter mechanism according to claim 4.
By rotating the rotating member in which the reset cam and the charge cam are formed in one direction, the front curtain holding member and the rear curtain holding member are driven, and the front curtain charging member and the rear curtain charging member are driven. A shutter mechanism characterized in that at least one of the two is driven.
請求項1に記載のシャッター機構であって、
前記先幕当接部材として、前記先幕の走行完了時に前記先幕駆動部材とそれぞれ異なる箇所で当接する第1先幕当接部材と第2先幕当接部材とを備える
ことを特徴とするシャッター機構。
The shutter mechanism according to claim 1.
The front curtain contact member includes a first front curtain contact member and a second front curtain contact member that come into contact with the front curtain driving member at different locations when the traveling of the front curtain is completed. Shutter mechanism.
請求項6に記載のシャッター機構であって、
前記先幕の走行完了後に、前記先幕駆動部材は、前記第1先幕当接部材と前記第2先幕当接部材のいずれか一方と、前記先幕押さえ部材とにより保持される
ことを特徴とするシャッター機構。
The shutter mechanism according to claim 6.
After the traveling of the front curtain is completed, the front curtain driving member is held by either one of the first front curtain contact member, the second front curtain contact member, and the front curtain holding member. The featured shutter mechanism.
請求項1〜7のいずれか一項に記載のシャッター機構を備える撮像装置。 An imaging device including the shutter mechanism according to any one of claims 1 to 7.
JP2019183581A 2019-10-04 2019-10-04 Shutter mechanism and imaging device Active JP7334569B2 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10282544A (en) * 1997-04-08 1998-10-23 Copal Co Ltd Focal plane shutter
JP2001021947A (en) * 1999-07-08 2001-01-26 Nidec Copal Corp Focal plane shutter for camera
JP2014059354A (en) * 2012-09-14 2014-04-03 Canon Inc Focal plane shutter, imaging apparatus, and imaging system
JP2016139100A (en) * 2015-01-29 2016-08-04 日本電産コパル株式会社 Camera focal plane shutter, and digital camera with the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10282544A (en) * 1997-04-08 1998-10-23 Copal Co Ltd Focal plane shutter
JP2001021947A (en) * 1999-07-08 2001-01-26 Nidec Copal Corp Focal plane shutter for camera
JP2014059354A (en) * 2012-09-14 2014-04-03 Canon Inc Focal plane shutter, imaging apparatus, and imaging system
JP2016139100A (en) * 2015-01-29 2016-08-04 日本電産コパル株式会社 Camera focal plane shutter, and digital camera with the same

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