JPH1195282A - Focal plane shutter for camera - Google Patents
Focal plane shutter for cameraInfo
- Publication number
- JPH1195282A JPH1195282A JP25679497A JP25679497A JPH1195282A JP H1195282 A JPH1195282 A JP H1195282A JP 25679497 A JP25679497 A JP 25679497A JP 25679497 A JP25679497 A JP 25679497A JP H1195282 A JPH1195282 A JP H1195282A
- Authority
- JP
- Japan
- Prior art keywords
- blade
- rear blade
- operating member
- main arm
- blade group
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、撮影に際し、先羽
根群と後羽根群とを同一方向へ順次作動させ、両羽根群
のスリット形成羽根によって形成されたスリットにより
フィルムを露光するようにしたカメラ用のフォーカルプ
レンシャッタに関する。BACKGROUND OF THE INVENTION In the present invention, in photographing, a front blade group and a rear blade group are sequentially operated in the same direction, and a film is exposed by slits formed by slit forming blades of both blade groups. The present invention relates to a focal plane shutter for a camera.
【０００２】[0002]
【従来の技術】カメラの小型化及び高性能化に伴い、フ
ォーカルプレンシャッタに対しても小型化と高速化が要
求されている。周知のように、この種のシャッタにおい
て小型化を図るためには、各羽根群の羽根の枚数を多く
するのが効果的であり、また、高速化を図るためには、
各羽根群の重量を減じるのが効果的である。しかし、小
型化を図るべく羽根の枚数を増やすと、展開状態（露光
開口を覆っている状態）における羽根同志の重なり面の
数が増えることから、羽根群全体の重量が大きくなっ
て、高速化の要求には逆行してしまうことになる。従っ
て、小型化と高速化の両方を満足させるためには、各羽
根群の重量を減じることが共通の課題となってくる。2. Description of the Related Art As cameras become smaller and have higher performance, focal plane shutters are also required to be smaller and faster. As is well known, in order to reduce the size of this type of shutter, it is effective to increase the number of blades in each blade group, and to increase the speed,
It is effective to reduce the weight of each blade group. However, if the number of blades is increased in order to reduce the size, the number of overlapping surfaces of the blades in the unfolded state (covering the exposure opening) increases, so that the weight of the entire blade group increases and the speed increases. Would go against the request. Therefore, in order to satisfy both miniaturization and high speed, it is a common problem to reduce the weight of each blade group.
【０００３】そこで、そのような課題を解決するために
は、羽根の平面積を小さくするか、羽根の厚さを薄くす
るのが最も簡単である。しかし、羽根の面積を小さくす
ると、展開状態における羽根同志の重なり面積が少なく
なって、その重合部からの漏光が問題になる。他方、羽
根の厚さを余り薄くすると、羽根の平面性を確保するの
が難しくなり、その上、カメラの不使用時における振動
によって展開状態にある羽根が撓み易くなるので、やは
り、羽根の重合部からの漏光が問題になる。しかも、最
近においては高感度フィルムが好んで使用されるように
なってきたので、このような漏光に対する対策が益々重
要になっている。In order to solve such a problem, it is easiest to reduce the plane area of the blade or to reduce the thickness of the blade. However, when the area of the blade is reduced, the overlapping area of the blades in the deployed state is reduced, and light leakage from the overlapping portion becomes a problem. On the other hand, if the thickness of the blade is made too thin, it becomes difficult to secure the flatness of the blade, and furthermore, the blade in the deployed state is easily bent by vibration when the camera is not used, so that the stacking of the blade Light leakage from the part becomes a problem. In addition, recently, high-sensitivity films have been favorably used, so that measures against such light leakage have become increasingly important.
【０００４】そのような漏光対策に好適な機能を備えて
いるフォーカルプレンシャッタが、実用新案登録第２５
０５４１０号公報に開示されている。この従来例の場合
には、先羽根群は先羽根用駆動部材（上記公報において
は先駆動部材。以下、括弧内の記載は同じ趣旨。）に連
結されているが、後羽根群は、後羽根用駆動部材（第２
後駆動部材）に連結されておらず、後羽根用作動部材
（第１後駆動部材）に連結されており、その後羽根用作
動部材（第１後駆動部材）は、露光作動時にのみ、後羽
根用駆動部材（第２後駆動部材）によって作動させられ
るようになっている。A focal plane shutter having a function suitable for such a light leakage countermeasure is disclosed in Utility Model Registration No. 25.
No. 05410. In the case of this conventional example, the leading blade group is connected to a leading blade driving member (the leading driving member in the above-mentioned publication. Hereinafter, the description in parentheses has the same meaning). Blade driving member (second
The rear blade operating member (first rear driving member) is not connected to the rear blade operating member (first rear driving member), and the rear blade operating member (first rear driving member) is only connected to the rear blade during the exposure operation. It is adapted to be operated by a driving member for use (a second rear driving member).
【０００５】そして、撮影終了直後に、フィルムの巻き
上げに連動して各駆動部材（先駆動部材と第２後駆動部
材）が、初期位置から作動するセット部材（チャージ部
材）によってセット作動をさせられると、先羽根群はセ
ット位置へ作動するが、後羽根群は、後羽根用作動部材
（第１後駆動部材）が自己の作動習性に抗して、当初は
係止部材（保持部材）に係止され、次にはセット部材
（チャージ部材）に係止されることによって、セット位
置へは作動しないようになっている。従って、カメラの
不使用時には、露光開口を、先羽根群と後羽根群とによ
って二重に覆っていることになり、上記のような漏光の
心配がなくなる。そこで、このようなタイプのシャッタ
を、通常は二重遮光式のシャッタと称している。Immediately after the photographing is completed, each driving member (a first driving member and a second rear driving member) is set by a set member (a charging member) that operates from an initial position in conjunction with the winding of the film. Then, the front blade group is operated to the set position, but the rear blade group is configured such that the rear blade operating member (first rear driving member) initially acts as a locking member (holding member) against its own operation habit. By being locked, and then locked by a set member (charge member), it does not operate to the set position. Therefore, when the camera is not used, the exposure aperture is double-covered by the front blade group and the rear blade group, so that there is no fear of light leakage as described above. Therefore, such a type of shutter is usually referred to as a double-shielded shutter.
【０００６】そして、次の撮影が行われるとき、レリー
ズの初期段階において、先ず、セット部材（チャージ部
材）が初期位置へ復帰することによって、後羽根用作動
部材（第１後駆動部材）に対する係止が解け、後羽根群
は後羽根用作動部材（第１後駆動部材）と共に露光開口
から退き、露光作動開始位置に達する。その後に、先羽
根用駆動部材（先駆動部材）と後羽根用駆動部材（第２
後駆動部材）は、順次、釈放され、先羽根群は先羽根用
駆動部材（先駆動部材）によって、直接、露光作動を行
わされ、後羽根群は、後羽根用作動部材（第１後駆動部
材）が後羽根用駆動部材（第２後駆動部材）に作動させ
られることによって露光作動を行わされるようになって
いる。Then, when the next photographing is performed, in the initial stage of the release, first, the set member (charge member) returns to the initial position, thereby engaging the rear blade operating member (first rear drive member). The stop is released, and the rear blade group retreats from the exposure opening together with the rear blade operating member (first rear driving member) to reach the exposure operation start position. Thereafter, the driving member for the front blade (first driving member) and the driving member for the rear blade (second
The rear driving member) is sequentially released, and the front blade group is directly subjected to the exposure operation by the front blade driving member (first driving member), and the rear blade group is operated by the rear blade operating member (first rear driving member). The exposure operation is performed by causing the rear member driving member (the second rear driving member) to operate the rear member.
【０００７】[0007]
【発明が解決しようとする課題】本発明は、上記のよう
に、カメラの不使用時には、露光開口を先羽根群と後羽
根群とによって覆っている二重遮光式のフォーカルプレ
ンシャッタの改良に関するものである。SUMMARY OF THE INVENTION The present invention relates to an improvement in a double light-shielding focal plane shutter in which an exposure aperture is covered by a front blade group and a rear blade group when the camera is not used, as described above. Things.
【０００８】ところで、このようなフォーカルプレンシ
ャッタは、遮光機能は優れているものの、後羽根群に複
雑な作動を行わせるため、構造が複雑になって、コスト
の点では問題がある。即ち、上記の従来例において、後
羽根群の駆動部材を、後羽根用駆動部材と後羽根用作動
部材に分離していることは止むを得ないとしても、セッ
ト時に後羽根用作動部材を係止しておくために、セット
部材と係止部材の両方を関与させているため、部品点数
が増えてしまうという問題点がある。また、セット作動
時に、セット部材が後羽根用作動部材の係止位置に達し
た後、先羽根用駆動部材によって、係止部材による後羽
根用作動部材の係止を解除するようにしておるので、セ
ット部材と後羽根用作動部材との間、係止部材と後羽根
用作動部材との間、係止部材と先羽根用駆動部材との間
に、夫々所定の関係が得られるようにしなければなら
ず、組立作業が面倒になるという問題点がある。Although such a focal plane shutter has an excellent light-shielding function, it causes the rear blade group to perform a complicated operation, so that the structure becomes complicated and there is a problem in terms of cost. That is, in the above-mentioned conventional example, even if it is unavoidable that the driving member of the rear blade group is separated into the driving member for the rear blade and the operating member for the rear blade, the operating member for the rear blade is involved in the setting. Since both the set member and the locking member are involved for stopping the operation, there is a problem that the number of parts increases. Also, during the set operation, after the set member reaches the locking position of the rear blade operating member, the front blade drive member releases the locking of the rear blade operating member by the locking member. A predetermined relationship must be obtained between the set member and the rear blade operating member, between the locking member and the rear blade operating member, and between the locking member and the front blade driving member. Therefore, there is a problem that the assembling work is troublesome.
【０００９】本発明は、このような問題点を解決するた
めになされたものであり、その目的とするところは、上
記した係止部材のような特別な部材をを設けることな
く、低コストで二重遮光機能が得られるようにしたカメ
ラ用フォーカルプレンシャッタを提供することである。The present invention has been made to solve such a problem, and an object of the present invention is to provide a low-cost device without providing a special member such as the above-described locking member. An object of the present invention is to provide a focal plane shutter for a camera which can obtain a double light shielding function.
【００１０】[0010]
【課題を解決するための手段】上記の目的を達成するた
めに、本発明のカメラ用フォーカルプレンシャッタは、
各々が主アームを含む二つのアームによって複数枚の羽
根を枢支しており該主アームの往復回動によって露光用
開口の開閉作動を行う先羽根群及び後羽根群と、先羽根
群の主アームに連結されていて該主アームと同軸心上で
往復回動が可能であり露光作動時には先羽根用駆動ばね
によって回動される先羽根用駆動部材と、後羽根群の主
アームに連結されていて該主アームと同軸心上で往復回
動が可能な後羽根用作動部材と、後羽根群と後羽根用作
動部材とをセット方向に作動させる付勢ばねと、後羽根
群の主アームと同軸心上で往復回動が可能であって露光
作動時に後羽根用駆動ばねによって回動され後羽根用作
動部材を押動し回動させる後羽根用駆動部材と、セット
時に初期位置から作動して先羽根用駆動部材と後羽根用
駆動部材とを前記各駆動ばねに抗してセット位置へ回動
させる前に係合部によって前記付勢ばねによる後羽根用
作動部材の回動を阻止し先羽根用駆動部材の露光作動の
直前に初期位置へ復帰することによって後羽根用作動部
材と後羽根群のセット位置への作動を可能にするセット
部材とを備えているようにする。また、本発明のカメラ
用フォーカルプレンシャッタにおいては、好ましくは、
前記セット部材は往復回動が可能であって、該セット部
材には、後羽根用駆動部材を押してセット位置へ作動さ
せる押動部と、後羽根用作動部材のセット方向への回動
を阻止する前記の係合部とが、セット部材の回動軸の略
同じ径方向位置において、該回動軸の軸方向に二段に形
成されていて、且つ該係合部が該押動部よりもセット作
動方向に張り出して形成されているようにする。更に、
本発明のカメラ用フォーカルプレンシャッタにおいて
は、好ましくは、前記後羽根群の主アームと後羽根用作
動部材とが一体的に構成されているようにする。In order to achieve the above object, a focal plane shutter for a camera according to the present invention comprises:
A plurality of blades each of which is pivotally supported by two arms including a main arm, and a front blade group and a rear blade group for opening and closing an exposure opening by reciprocating rotation of the main arm; The first arm driving member is connected to the arm and is reciprocally rotatable coaxially with the main arm and is rotated by the first blade driving spring during the exposure operation, and is connected to the main arm of the rear blade group. A rear blade operating member capable of reciprocating rotation coaxially with the main arm, a biasing spring for operating the rear blade group and the rear blade operating member in the set direction, and a main arm of the rear blade group A reciprocating rotation is possible on the same axis as the rear blade driving member that is rotated by the rear blade driving spring during the exposure operation and pushes and rotates the rear blade operating member, and operates from the initial position at the time of setting And the driving member for the front blade and the driving member for the rear blade Before rotating to the set position against the driving spring, the engaging portion prevents the biasing spring from rotating the rear blade operating member, and returns to the initial position immediately before the exposure operation of the front blade driving member. With this, the rear blade operating member and the set member that enables the rear blade group to be operated to the set position are provided. In the focal plane shutter for a camera of the present invention, preferably,
The set member is capable of reciprocating rotation. The set member includes a pushing portion that presses a rear blade drive member to operate to a set position, and prevents rotation of the rear blade operating member in a setting direction. The engaging portion is formed in two stages in the axial direction of the rotating shaft at substantially the same radial position of the rotating shaft of the set member, and the engaging portion is Are formed so as to protrude in the set operation direction. Furthermore,
In the focal plane shutter for a camera according to the present invention, the main arm of the rear blade group and the operating member for the rear blade are preferably integrally formed.
【００１１】[0011]
【発明の実施の形態】本発明の実施の形態を、図１〜図
５に示した実施例によって説明する。尚、図１〜図３の
平面図は、図１が露光作動終了直後の状態を示し、図２
がセット状態を示し、図３が露光作動開始直前の状態を
示したものである。また、図４は主な部材の平面図であ
って、図４（ａ）は後羽根用駆動部材、図４（ｂ）は後
羽根用作動部材、図４（ｃ）はセット部材を示したもの
である。更に、図５は後羽根用駆動部材と後羽根用作動
部材の軸支構成を示した断面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to an embodiment shown in FIGS. 1 to 3 show a state immediately after the end of the exposure operation in FIG.
Shows a set state, and FIG. 3 shows a state immediately before the start of the exposure operation. 4A and 4B are plan views of main members. FIG. 4A shows a driving member for the rear blade, FIG. 4B shows an operating member for the rear blade, and FIG. 4C shows a set member. Things. FIG. 5 is a cross-sectional view showing a pivotal support structure of a rear blade drive member and a rear blade operating member.
【００１２】先ず、本実施例の構成から説明する。シャ
ッタ地板１の略中央部には、周知のようにして開口部１
ａが形成されている。但し、開口部１ａから右側の構成
は、本発明にとっては特に重要ではないので、図示を省
略してある。また、図示していないが、周知のようにし
て、シャッタ地板１の背面側（カメラ内においてはフィ
ルム側）には、順に中間板と補助地板が取り付けられて
いて、シャッタ地板１と中間板の間には先羽根群の羽根
室が、中間板と補助地板の間には後羽根群の羽根室が形
成されている。更に、中間板と補助地板にも、開口部１
ａと類似の形状をした開口部が形成されていて、それら
の三つの開口部を重ね合わせることにより、光軸を中心
にした長方形の露光開口が形成されている。尚、補助地
板については、その一部を図５に示し、符号２を付けて
ある。First, the configuration of this embodiment will be described. In a substantially central portion of the shutter base plate 1, an opening 1
a is formed. However, since the configuration on the right side from the opening 1a is not particularly important for the present invention, it is not shown. Although not shown, an intermediate plate and an auxiliary base plate are sequentially mounted on the back side (the film side in the camera) of the shutter base plate 1 in a well-known manner, and between the shutter base plate 1 and the intermediate plate, as is well known. A blade chamber of the front blade group is formed, and a blade chamber of the rear blade group is formed between the intermediate plate and the auxiliary base plate. Further, the opening 1 is also provided in the intermediate plate and the auxiliary base plate.
An opening having a shape similar to a is formed, and a rectangular exposure opening centered on the optical axis is formed by overlapping these three openings. In addition, about an auxiliary | assistant base plate, a part is shown in FIG.
【００１３】シャッタ地板１には、円弧状をした三つの
孔１ｂ，１ｃ，１ｄが形成されており、それらのうち円
弧状をした二つの孔１ｂ，１ｃの下端縁には、平面形状
がＣ字状をしていてゴム等の弾力性のある材料で製作さ
れた周知の緩衝部材３，４が取り付けられている。ま
た、シャッタ地板１には、軸１ｅ，１ｆ，１ｇ，１ｈ，
１ｉが立設されている。これらの軸のうち、軸１ｅ，１
ｆ，１ｇはシャッタ地板１の表面側に立設され、軸１
ｈ，１ｉは背面側に立設されている。但し、軸１ｅ，１
ｆはシャッタ地板１を貫通して立設されており、背面側
にも軸部を有している。そのことは、図５に示した軸１
ｆの形状によって理解される。また、図示していない
が、シャッタ地板１の表面側には、軸１ｅ，１ｆ，１ｇ
の先端には、シャッタ地板１と平行になるようにして、
周知の支持板とプリント配線板が取り付けられている。The shutter base plate 1 is formed with three arc-shaped holes 1b, 1c and 1d. Of these two arc-shaped holes 1b and 1c, the lower end edges of the two arc-shaped holes 1b, 1c have a flat shape. Well-known cushioning members 3 and 4 each having a letter shape and made of a resilient material such as rubber are attached. Further, the shaft 1e, 1f, 1g, 1h,
1i is erected. Of these axes, axes 1e, 1
f, 1g are erected on the front side of the shutter base plate 1, and the shaft 1
h, 1i are erected on the back side. However, shafts 1e, 1
f stands upright through the shutter base plate 1 and also has a shaft portion on the back side. That is, the axis 1 shown in FIG.
It is understood by the shape of f. Although not shown, the shafts 1e, 1f, 1g are provided on the front side of the shutter base plate 1.
At the tip of the camera so that it is parallel to the shutter base plate 1,
A well-known support plate and a printed wiring board are attached.
【００１４】シャッタ地板１の背面側に配置されている
先羽根群は、二つのアーム５，６と２枚の羽根７，８で
構成されており、アーム５，６は軸１ｅ，１ｈに回転可
能に取り付けられている。また、羽根７，８は、アーム
５，６の異なる長さ位置に枢支されており、先端部に枢
支された羽根７がスリット形成羽根となっている。更
に、アーム５，６のうちアーム５が、後述する先羽根用
駆動部材と連結する主アームであって、そのために長孔
５ａが形成されている。他方、後羽根群は、二つのアー
ム９，１０と３枚の羽根１１，１２，１３で構成されて
おり、アーム９，１０は、軸１ｆ，１ｉに回転可能に取
り付けられ、それらの異なる長さ位置に羽根１１，１
２，１３を枢支している。そして、羽根１１がスリット
形成羽根となっている。また、アーム９が、後述する後
羽根用作動部材と連結する主アームであって、長孔９ａ
が形成されている。The front blade group arranged on the back side of the shutter base plate 1 is composed of two arms 5, 6 and two blades 7, 8, and the arms 5, 6 rotate about shafts 1e, 1h. Mounted as possible. The blades 7 and 8 are pivotally supported at different length positions of the arms 5 and 6, and the blade 7 pivotally supported at the tip is a slit forming blade. Further, the arm 5 among the arms 5 and 6 is a main arm connected to a driving member for a leading blade described later, and for that purpose, an elongated hole 5a is formed. On the other hand, the rear blade group is composed of two arms 9,10 and three blades 11,12,13. The arms 9,10 are rotatably mounted on the shafts 1f, 1i and have different lengths. In the position, the blades 11,1
It pivots 2,13. The blade 11 is a slit forming blade. The arm 9 is a main arm connected to a rear blade operating member described later, and is a long hole 9a.
Are formed.
【００１５】シャッタ地板１の表面側において、軸１ｅ
には先羽根用駆動部材１４が回転可能に取り付けられて
おり、図示していないが、周知のようにして先羽根用駆
動ばねによって時計方向へ回転するように付勢されてい
る。この先羽根用駆動部材１４は合成樹脂製であって、
作動ピン１４ａ，被押動部１４ｂ，取付部１４ｃが設け
られている。このうち、作動ピン１４ａは、シャッタ地
板１に形成されている円弧状の孔１ｂを貫通し、アーム
５の長孔５ａに嵌合している。そして、この嵌合関係が
ガタつかず、先羽根用駆動部材１４とアーム５が常に所
定の連結状態で作動できるようにするために、アーム５
は、ばね１５によって、反時計方向へ回転するように付
勢されている。尚、周知であるが、このばね１５はアー
ム６に掛けてもよく、また、その付勢力は、上記した先
羽根用駆動ばねよりも弱いことは言うまでもない。On the front side of the shutter base plate 1, a shaft 1e
The front blade drive member 14 is rotatably mounted on the, and is urged to rotate clockwise by a front blade drive spring as is well known, although not shown. The front blade drive member 14 is made of synthetic resin,
An operating pin 14a, a pushed portion 14b, and a mounting portion 14c are provided. The operating pin 14 a penetrates through an arc-shaped hole 1 b formed in the shutter base plate 1 and is fitted into the long hole 5 a of the arm 5. In order to ensure that the fitting relationship does not rattle and that the leading blade drive member 14 and the arm 5 can always be operated in a predetermined connection state,
Is urged by a spring 15 to rotate counterclockwise. As is well known, the spring 15 may be hung on the arm 6, and it is needless to say that the urging force is weaker than the above-mentioned driving spring for the leading blade.
【００１６】また、先羽根用駆動部材１４の被押動部１
４ｂは、シャッタ地板１の表面側に一段下げて形成され
ている。これは、後述する作動説明から理解されるが、
この先羽根用駆動部材１４と後記のセット部材とが、互
いに作動上干渉せず、被押動部１４ｂにおいてのみ接触
することができるようにするためである。更に、先羽根
用駆動部材１４の取付部１４ｃには、鉄片部材１６が取
り付けられている。この鉄片部材１６の取り付け方は周
知であるため、図面上では簡略的に示してあるが、先羽
根用駆動部材１４のセット作動の最終段階において、鉄
片部材１６が図示していない電磁石に接触したとき、鉄
片部材１６の接触面が、取付部１４ｃ内に配置されてい
る図示していないばねの力に抗して、取付部１４ｃ側に
移動できるようにして取り付けられている。Further, the pushed portion 1 of the leading blade driving member 14
4 b is formed one step lower on the front side of the shutter base plate 1. This will be understood from the operation description described later,
This is because the front blade drive member 14 and the later-described set member do not interfere with each other in operation and can come into contact with each other only in the pushed portion 14b. Further, an iron piece member 16 is attached to the attachment portion 14c of the leading blade drive member 14. Since the method of attaching the iron piece member 16 is well known, it is schematically shown in the drawing, but in the final stage of the setting operation of the leading blade drive member 14, the iron piece member 16 has contacted an electromagnet (not shown). At this time, the contact surface of the iron piece member 16 is attached so as to be movable toward the attachment portion 14c against the force of a spring (not shown) arranged in the attachment portion 14c.
【００１７】シャッタ地板１の軸１ｆには、後羽根用駆
動部材１７と後羽根用作動部材１８が回転可能に取り付
けられている。そして、これらの部材の平面形状は、夫
々図４（ａ），図４（ｂ）に示されており、それらの取
り付け構成は図５から理解できるようにしてある。そこ
で先ず、取り付け構成から説明する。図５から明らかな
ように、後羽根用駆動部材１７は、実際には、板部１７
Ａと軸部１７Ｂで構成されている。そして、軸部１７Ｂ
には、シャッタ地板側から鍔部，大径部，中径部，小径
部が形成されていて、後羽根用作動部材１８は大径部に
対して回転可能に嵌合させられている。また、中径部に
はスペーサー１９を嵌合させた後、板部１７Ａを嵌合さ
せ、その板部１７Ａを軸部１７Ｂと一体化させている。
このようにして、後羽根用駆動部材１７と後羽根用作動
部材１８とを相互に回転可能に取り付けてから、軸部１
７Ｂを軸１ｆに対して回転可能に嵌合させているわけで
ある。A rear blade drive member 17 and a rear blade operating member 18 are rotatably mounted on a shaft 1f of the shutter base plate 1. The planar shapes of these members are shown in FIGS. 4A and 4B, respectively, and the mounting configuration thereof can be understood from FIG. Therefore, the mounting configuration will be described first. As is apparent from FIG. 5, the rear blade drive member 17 is actually
A and a shaft portion 17B. And the shaft part 17B
A flange portion, a large diameter portion, a medium diameter portion, and a small diameter portion are formed from the shutter base plate side, and the rear blade operating member 18 is rotatably fitted to the large diameter portion. After fitting the spacer 19 to the middle diameter portion, the plate portion 17A is fitted, and the plate portion 17A is integrated with the shaft portion 17B.
In this way, the rear blade drive member 17 and the rear blade operating member 18 are rotatably attached to each other.
7B is rotatably fitted to the shaft 1f.
【００１８】このようにして取り付けられている後羽根
用駆動部材１７は、図示していないが、軸部１７Ｂの小
径部に緩く巻回された周知の後羽根用駆動ばねによっ
て、図１において時計方向へ回転するように付勢されて
いる。また、後羽根用駆動部材１７には、被押動部１７
ａ，折曲部１７ｂ，取付部１７ｃが形成されていて、取
付部１７ｃには、鉄片部材２０が取り付けられている。
そして、この鉄片部材２０も、上記した鉄片部材１６と
同様にして取り付けられている。Although not shown, the rear-wing driving member 17 mounted in this manner is a timepiece shown in FIG. 1 by a well-known rear-wing driving spring loosely wound around a small diameter portion of the shaft portion 17B. It is urged to rotate in the direction. Further, the driven member 17 for the rear blade has a pushed portion 17.
a, a bent portion 17b, and a mounting portion 17c are formed, and an iron piece member 20 is mounted on the mounting portion 17c.
The iron piece member 20 is attached in the same manner as the iron piece member 16 described above.
【００１９】他方、後羽根用作動部材１８には、作動ピ
ン１８ａと、円弧面１８ｂ1 を有する係合部１８ｂが設
けられている。このうち、作動ピン１８ａは、シャッタ
地板１に形成されている円弧状の孔１ｃを貫通して、ア
ーム９の長孔９ａに嵌合している。そして、この嵌合関
係がガタつかず、後羽根用作動部材１８とアーム９が常
に所定の連結状態で作動できるようにするために、アー
ム９は、ばね２１によって、反時計方向へ回転するよう
に付勢されている。しかし、後述の作動説明から分かる
が、このばね２１は、その外にも、二重遮光機能にとっ
て重要な役目を果たすようになっている。尚、ばね２１
はアーム１０に掛けてあっても構わない。また、その付
勢力は、上記した後羽根用駆動ばねよりも弱い。[0019] On the other hand, the trailing blade for actuating member 18, the operating pin 18a, the engaging portion 18b having an arcuate surface 18b 1 is provided. Of these, the operating pin 18a penetrates an arc-shaped hole 1c formed in the shutter base plate 1 and fits into the long hole 9a of the arm 9. The arm 9 is rotated by a spring 21 in a counterclockwise direction so that the fitting relationship does not rattle and the rear blade operating member 18 and the arm 9 can always be operated in a predetermined connection state. Has been energized. However, as will be understood from the operation description described later, the spring 21 also plays an important role for the double light shielding function. The spring 21
May be hung on the arm 10. Further, the urging force is weaker than that of the above-described rear blade drive spring.
【００２０】シャッタ地板１の軸１ｇには、セット部材
２２が回転可能に嵌合され、図示していないばねによっ
て、反時計方向へ回転するように付勢されている。そし
て、このセット部材２２には、図４（ｃ）に示されてい
るように、二つの押動部２２ａ，２２ｂ，係合部２２
ｃ，被押動部２２ｄが形成され、背部にはピン２２ｅが
設けられている。このうち、押動部２２ａは先羽根用駆
動部材１４の被押動部１４ｂと接触し、また、押動部２
２ｂは後羽根用駆動部材１７の被駆動部１７ａに接触し
得るようになっている。A set member 22 is rotatably fitted to the shaft 1g of the shutter base plate 1, and is urged by a spring (not shown) to rotate counterclockwise. As shown in FIG. 4C, the set member 22 has two pushing portions 22a and 22b,
c, a pushed portion 22d is formed, and a pin 22e is provided on the back. Of these, the pushing portion 22a contacts the pushed portion 14b of the leading blade drive member 14, and the pushing portion 2a
2b is configured to be able to contact the driven portion 17a of the rear blade driving member 17.
【００２１】また、係合部２２ｃは、押動部２２ｂと、
略同じ位置において二段に形成されているが、セット部
材２２の時計方向の回転方向に対しては、押動部２２ｂ
より張り出すようにして形成されている。そして、この
係合部２２ｃは、後羽根用作動部材１８の係合部１８ｂ
に形成されている円弧面１８ｂ1 に接し得るようになっ
ている。更に、ピン２２ｅは、シャッタ地板１の円弧状
の孔１ｄに挿入されており、孔１ｄの下端面に当接する
ことによって、図示していないばねによるセット部材２
２の反時計方向への回転が阻止されるようになってい
る。Further, the engaging portion 22c includes a pushing portion 22b,
Although it is formed in two stages at substantially the same position, the pressing portion 22 b
It is formed so as to overhang. The engaging portion 22c is connected to the engaging portion 18b of the rear blade operating member 18.
So that the can in contact with the arcuate surface 18b 1 formed in. Further, the pin 22e is inserted into an arc-shaped hole 1d of the shutter base plate 1, and is brought into contact with the lower end surface of the hole 1d to thereby set the set member 2 by a spring (not shown).
2 is prevented from rotating counterclockwise.
【００２２】次に、本実施例の作動を説明する。図１
は、露光作動の終了直後の状態を示している。従って、
先羽根群の羽根７，８は重畳されて、開口部１ａの下方
位置に格納されており、後羽根群の羽根１１，１２，１
３が展開状態となって開口部１ａを覆っている。また、
セット部材２２は初期位置にあり、ピン２２ｅは、シャ
ッタ地板１の円弧状の孔１ｄの下端面に接触している。
このようにして、露光作動が終了すると、フィルムの自
動巻き上げに連動して、図示していないカメラ本体側の
部材が、セット部材２２の被押動部２２ｄを下方へ押
し、セット部材２２を、図示していないばねの力に抗し
て時計方向へ回転させ、セット操作を行わせる。Next, the operation of this embodiment will be described. FIG.
Indicates a state immediately after the end of the exposure operation. Therefore,
The blades 7, 8 of the front blade group are superimposed and stored at a position below the opening 1a, and the blades 11, 12, 1, 1 of the rear blade group.
3 is in an unfolded state and covers the opening 1a. Also,
The set member 22 is at the initial position, and the pin 22e is in contact with the lower end surface of the arc-shaped hole 1d of the shutter base plate 1.
In this manner, when the exposure operation is completed, the member on the camera body side (not shown) pushes the pushed portion 22d of the set member 22 downward in conjunction with the automatic winding of the film, and the set member 22 is moved. It is rotated clockwise against the force of a spring (not shown) to perform the setting operation.
【００２３】セット部材２２は、このような時計方向へ
のセット作動において、先ず、押動部２２ａが被押動部
１４ｂを押し、先羽根用駆動部材１４を図示していない
先羽根用駆動ばねに抗して反時計方向へ回転させる。次
に、押動部２２ｂが被押動部１７ａを押し、後羽根用駆
動部材１７を図示していない後羽根用駆動ばねに抗して
反時計方向へ回転させ始める。後羽根用駆動部材１７が
反時計方向へ回転すると、折曲部１７ｂが後羽根用作動
部材１８の側面から退いて行くから、後羽根用作動部材
１８も、ばね２１の付勢力によって反時計方向へ追従し
ようとするが、押動部２２ｂが被押動部１７ａに接触し
たときには、既に係合部２２ｃが、後羽根用作動部材１
８の係合部１８ｂの作動軌跡内に進入しているので、後
羽根用作動部材１８は、円弧面１８ｂ1 が係合部２２ｃ
に接触し、追従することができない。In such a setting operation in the clockwise direction, first, the pushing member 22a pushes the pushed member 14b, and the leading blade driving member 14 is moved to the leading blade driving spring (not shown). Rotate counterclockwise against Next, the pushing portion 22b pushes the pushed portion 17a, and starts rotating the rear blade driving member 17 counterclockwise against the rear blade driving spring (not shown). When the rear blade drive member 17 rotates counterclockwise, the bent portion 17b retreats from the side surface of the rear blade operation member 18, so that the rear blade operation member 18 also moves counterclockwise by the urging force of the spring 21. However, when the pushing portion 22b comes into contact with the pushed portion 17a, the engaging portion 22c has already been actuated by the rear blade operating member 1.
Since enters 8 in the working locus of the engagement portion 18b, the rear blade for actuating member 18, arcuate surface 18b 1 is engaged portion 22c
Contact and cannot follow.
【００２４】そのため、セット部材２２は、係合部２２
ｃを円弧面１８ｂ1 に摺動させつつ、先羽根用駆動部材
１４と後羽根用駆動部材１７だけを反時計方向へ回転さ
せることになる。従って、このセット作動においては、
先羽根群の羽根７，８は相互の重なり量を減じながら上
方へ作動させられていくが、後羽根群の羽根１１，１
２，１３は、後羽根用作動部材１８が反時計方向へ回転
できないので、展開状態のまま開口部１ａを覆ってい
る。本実施例においては、このように、押動部２２ｂと
係合部２２ｃが同じセット部材２２の略同じ位置に形成
されていて、係合部２２ｃが押動部２２ｂよりもセット
作動方向に僅かに張り出して形成されているので、製作
時における後羽根用駆動部材１７と後羽根用作動部材１
８に対するセット部材２２の位置決めが容易である。For this reason, the set member 22 is
while sliding c in arc surface 18b 1, it will be rotated only trailing blade driving member 17 counterclockwise and front blade driving member 14. Therefore, in this set operation,
The blades 7 and 8 of the front blade group are operated upward while reducing the amount of overlap therebetween, but the blades 11 and 1 of the rear blade group are moved upward.
The rear blades 2 and 13 cover the opening 1a in the deployed state because the rear blade operating member 18 cannot rotate counterclockwise. In this embodiment, as described above, the pushing portion 22b and the engaging portion 22c are formed at substantially the same position on the same set member 22, and the engaging portion 22c is slightly smaller in the setting operation direction than the pushing portion 22b. The rear blade drive member 17 and the rear blade operating member 1 during manufacturing.
The positioning of the set member 22 with respect to 8 is easy.
【００２５】このようにして行われるセット作動は、先
羽根用駆動部材１４に設けられた鉄片部材１６と、後羽
根用駆動部材１７に設けられた鉄片部材２０が、夫々、
図示されていない電磁石に接触した後、カメラ本体側の
部材の作動が停止することによってセット部材２２の回
転が停止し、終了する。その状態が図２に示されてい
る。そして、この状態は、カメラ本体側の部材がセット
部材２２の被押動部２２ｄに接触したままでいるため、
次の撮影が行われるまで維持されている。従って、カメ
ラの不使用状態においては、開口部１ａ、即ち露光開口
は、先羽根群の羽根７，８と後羽根群の羽根１１，１
２，１３によって二重に覆われていることになり、羽根
相互の重合部からの漏光は実質的に問題がなくなってし
まう。The setting operation performed in this manner is performed by the iron piece member 16 provided on the leading blade drive member 14 and the iron piece member 20 provided on the rear blade drive member 17, respectively.
After contact with an electromagnet (not shown), the operation of the members on the camera body side stops, so that the rotation of the set member 22 stops and ends. This state is shown in FIG. In this state, the member on the camera body side remains in contact with the pushed portion 22d of the set member 22,
It is maintained until the next shooting. Therefore, when the camera is not used, the opening 1a, that is, the exposure opening, is provided with the blades 7, 8 of the front blade group and the blades 11, 1 of the rear blade group.
As a result, the light from the overlapping portion of the blades substantially eliminates the problem.
【００２６】次の撮影に際して、カメラのレリーズボタ
ンが押されると、その初期段階で電源スイッチが閉じ
（カメラによってはレリーズボタンが押される前に電源
スイッチが閉じているものもある）、図示していない各
電磁石が通電状態となって、夫々、鉄片部材１６，２０
を吸着する。その段階で、セット部材２２の被押動部２
２ｄに接触していた図示していないカメラ本体側の部材
が上方へ退いて行くので、セット部材２２は、図示して
いないばねの付勢力によって反時計方向へ回転する。When the release button of the camera is pressed during the next photographing, the power switch is closed at the initial stage (some cameras have the power switch closed before the release button is pressed), and are shown. The respective electromagnets are turned on, and the iron pieces 16, 20
To adsorb. At that stage, the pushed portion 2 of the set member 22
Since the member on the camera body side (not shown) that has been in contact with 2d retreats upward, the set member 22 rotates counterclockwise by the urging force of the spring (not shown).
【００２７】その過程において、押動部２２ａ，２２ｂ
が、先羽根用駆動部材１４の被押動部１４ｂと、後羽根
用駆動部材１７の被押動部１７ａから離れるが、上記の
ように鉄片部材１６，２０が各電磁石によって吸着され
ているので、先羽根用駆動部材１４と後羽根用駆動部材
１７とは、図示していない先羽根用駆動ばねと後羽根用
駆動ばねによっては露光作動を行えない。しかしなが
ら、押動部２２ｂが後羽根用駆動部材１７の被押動部１
７ａから離れた直後に、係合部２２ｃと係合部１８ｂと
の係合が解かれるので、アーム９を付勢しているばね２
１によって、後羽根用作動部材１８は反時計方向へ回転
される。In the process, the pushing portions 22a, 22b
Moves away from the pushed portion 14b of the leading blade drive member 14 and the pushed portion 17a of the rear blade drive member 17, but since the iron pieces 16 and 20 are attracted by the respective electromagnets as described above. The exposure operation of the front blade driving member 14 and the rear blade driving member 17 cannot be performed by the front blade driving spring and the rear blade driving spring (not shown). However, the pushing portion 22b is not the pushed portion 1 of the rear blade drive member 17.
Immediately after moving away from the arm 7a, the engagement between the engaging portion 22c and the engaging portion 18b is released.
1, the rear blade operating member 18 is rotated counterclockwise.
【００２８】そして、この後羽根用作動部材１８の回転
は後先羽根用駆動部材１７の折曲部１７ｂに当接するま
で行われるが、その間に、後羽根群の羽根１１，１２，
１３は、相互の重なりを大きくしつつ上方へ作動し、開
口部１ａから退いていく。このようにして、後羽根用作
動部材１８が折曲部１７ｂに当接して停止し、後羽根群
の羽根１１，１２，１３が重畳状態となって、開口部１
ａの上方位置に格納される。他方、セット部材２２は、
その後、ピン２２ｅが孔１ｄの下端面に当接することに
よって初期位置に復帰する。その状態が図３に示されて
いる。そして、この状態が、先羽根群と後先羽根群との
露光作動開始の直前状態ということになる。The rotation of the rear blade operating member 18 is performed until the rear blade operating member 18 comes into contact with the bent portion 17b of the rear front blade driving member 17. During that time, the blades 11, 12, and
13 operate upward while increasing the mutual overlap, and retreat from the opening 1a. In this manner, the rear blade operating member 18 comes into contact with the bent portion 17b and stops, and the blades 11, 12, and 13 of the rear blade group are superimposed, and the opening 1
a. On the other hand, the set member 22
Thereafter, the pin 22e returns to the initial position by contacting the lower end surface of the hole 1d. This state is shown in FIG. This state is a state immediately before the start of the exposure operation of the front blade group and the rear front blade group.
【００２９】その後、自動焦点合わせ等の全ての準備作
動が終了すると、その終了信号によって露光時間制御回
路が作動し、先ず、先羽根用の電磁石に対する通電を断
つと共に露光秒時のカウントを開始する。それにより、
電磁石に鉄片部材１６を吸着保持されていた先羽根用駆
動部材１４が、図示していない先羽根用駆動ばねの付勢
力によって急速に時計方向へ回転する。そのため、先羽
根群の羽根７，８は、開口部１ａを覆っていた展開状態
から下方へ作動され、隣接する羽根との相互の重なり量
を大きくしながら開口部１ａを開放していく。そして、
各羽根が重畳状態となって開口部１ａから完全に退いた
後、先羽根用駆動部材１４の作動ピン１４ａが緩衝部材
３に当接し、衝撃を吸収されて停止する。After that, when all the preparatory operations such as automatic focusing are completed, the exposure time control circuit is operated by the end signal, and first, the energization of the electromagnet for the front blade is stopped and the counting of the exposure time is started. . Thereby,
The front blade drive member 14, which has held the iron piece member 16 by the electromagnet, is rapidly rotated clockwise by the urging force of the front blade drive spring (not shown). Therefore, the blades 7 and 8 of the front blade group are operated downward from the deployed state covering the opening 1a, and open the opening 1a while increasing the amount of mutual overlap with the adjacent blade. And
After the respective blades are superposed and completely retreat from the opening 1a, the operating pin 14a of the leading blade driving member 14 comes into contact with the buffer member 3, and the impact is absorbed to stop.
【００３０】先羽根群の露光作動が開始されてから所定
の時間が経過すると、露光時間制御回路からの出力信号
によって、今度は図示されていない後羽根用の電磁石に
対する通電が断たれる。それによって、それまで鉄片部
材２０を電磁石に吸着保持されていた後羽根用駆動部材
１７が、図示していない後羽根用駆動ばねの付勢力によ
って急速に時計方向へ回転する。このとき、折曲部１７
ｂに押され、後羽根用作動部材１８も急速に時計方向へ
回転する。そのため、後羽根群の羽根１１，１２，１３
は、開口部１ａの上方位置に格納されていた重畳状態か
ら下方へ作動され、隣接する羽根との相互の重なり量を
小さくしながら展開し、開口部１ａを閉鎖していく。そ
して、開口部１ａを完全に覆った段階において、後羽根
用作動部材１８の作動ピン１８ａが緩衝部材４に当接
し、衝撃を吸収されて停止する。このような露光作動の
終了直後の状態が図１に示された状態である。When a predetermined time has elapsed since the start of the exposure operation of the front blade group, the power supply to the electromagnet for the rear blade (not shown) is cut off by an output signal from the exposure time control circuit. As a result, the rear-blade driving member 17 which has held the iron piece member 20 by the electromagnet is rapidly rotated clockwise by the urging force of the rear-blade driving spring (not shown). At this time, the bent portion 17
b, the rear blade operating member 18 also rapidly rotates clockwise. Therefore, the blades 11, 12, 13 of the rear blade group
Is actuated downward from the superimposed state stored at a position above the opening 1a, and is developed while reducing the amount of overlap with adjacent blades, thereby closing the opening 1a. Then, when the opening 1a is completely covered, the operation pin 18a of the rear blade operation member 18 comes into contact with the buffer member 4, and the impact is absorbed to stop. The state immediately after the end of the exposure operation is the state shown in FIG.
【００３１】このように、本実施例によれば、後羽根群
の駆動系を後羽根用駆動部材１７と後羽根用作動部材１
８との二つの部材で構成することによって、他の部材を
設けることなく二重遮光機能が得られるので、上記した
従来例に比較して、可成りコストダウンを図ることがで
きる。また、本実施例におけるセット部材２２の構成に
よれば、上記したように、後羽根用駆動部材１７と後羽
根用作動部材１８に対する位置調整が簡単であり、且つ
セット作動時における後羽根用作動部材１８の抑止が確
実に行える。As described above, according to the present embodiment, the driving system of the rear blade group includes the driving member 17 for the rear blade and the operating member 1 for the rear blade.
By using the two members 8 and 8, a double light-shielding function can be obtained without providing any other members, so that the cost can be considerably reduced as compared with the above-described conventional example. According to the configuration of the set member 22 in the present embodiment, as described above, the position adjustment with respect to the rear blade drive member 17 and the rear blade operation member 18 is easy, and the rear blade operation during the set operation is performed. The member 18 can be reliably suppressed.
【００３２】尚、上記の実施例においては、ばね２１
が、孔９ａと作動ピン１８ａとの嵌合ガタを無くすため
と、後羽根群と後羽根用作動部材１８を露光作動開始位
置へ作動させるために用いられているが、本発明は、こ
のばね２１を、主に前者の目的に用い、後者の目的のた
めには、上記の従来例のようにして、もう一つのばね
を、後羽根用駆動部材１７と後羽根用作動部材１８との
間に、相互に引き合うようにして設けても差し支えな
い。また、本発明は、上記の実施例におけるアーム９と
後羽根用作動部材１８とを、合成樹脂で一部品として製
作しても差し支えない。その場合には、軸１ｆに相当す
る軸を補助地板２に立設し、その軸に、その部品を嵌合
させることになるので、そのためには、シャッタ地板１
の一部を切除することになる。In the above embodiment, the spring 21
Are used to eliminate looseness between the hole 9a and the operation pin 18a and to operate the rear blade group and the rear blade operation member 18 to the exposure operation start position. 21 is mainly used for the former purpose, and for the latter purpose, another spring is provided between the rear blade driving member 17 and the rear blade operating member 18 as in the above-described conventional example. Alternatively, they may be provided so as to attract each other. Further, in the present invention, the arm 9 and the rear blade operating member 18 in the above embodiment may be manufactured as a single part using a synthetic resin. In this case, a shaft corresponding to the shaft 1f is erected on the auxiliary base plate 2 and the component is fitted to the shaft.
Will be removed.
【００３３】更に、上記の実施例においては、先羽根用
駆動部材１４と後羽根用駆動部材１７に、夫々、鉄片部
材１６，２０を取り付け、露光作動の開始位置におい
て、先羽根用電磁石と後羽根用電磁石が、それらの鉄片
部材１６，２０を直接吸着保持しているようにした所謂
ダイレクトタイプのフォーカルプレンシャッタに適用し
た場合で説明した。しかしながら、本発明は、このよう
なタイプのフォーカルプレンシャッタに限定されるもの
ではない。即ち、露光作動の開始位置において、先羽根
用駆動部材１４と後羽根用駆動部材１７が、夫々、先羽
根用係止部材と後羽根用係止部材によって機械的に係止
されており、その係止を先羽根用電磁石と後羽根用電磁
石によって順に解除するようにした所謂係止タイプのフ
ォーカルプレンシャッタに適用することもできる。ま
た、それらの係止を、露光時間制御回路や電磁石を用い
ず、機械的な遅延機構を用いて順に解除するようにした
シャッタにも適用することができる。Further, in the above-described embodiment, iron pieces 16 and 20 are attached to the front blade drive member 14 and the rear blade drive member 17, respectively. The description has been given of the case where the blade electromagnet is applied to a so-called direct type focal plane shutter in which the iron piece members 16 and 20 are directly attracted and held. However, the invention is not limited to this type of focal plane shutter. That is, at the start position of the exposure operation, the front blade driving member 14 and the rear blade driving member 17 are mechanically locked by the front blade locking member and the rear blade locking member, respectively. The present invention can also be applied to a so-called locking type focal plane shutter in which the locking is sequentially released by the electromagnet for the front blade and the electromagnet for the rear blade. Further, the present invention can also be applied to a shutter in which these locks are sequentially released using a mechanical delay mechanism without using an exposure time control circuit or an electromagnet.
【００３４】[0034]
【発明の効果】上記のように、本発明によれば、従来よ
りも部品点数が少なく、組立調整も簡単になり、低コス
トで二重遮光機能が得られるようになる。As described above, according to the present invention, the number of parts is smaller than before, the assembly adjustment is simple, and the double light shielding function can be obtained at low cost.
【図１】実施例の露光作動終了直後の状態を示した平面
図である。FIG. 1 is a plan view showing a state immediately after the end of an exposure operation according to an embodiment.
【図２】実施例のセット状態を示した平面図である。FIG. 2 is a plan view showing a set state of the embodiment.
【図３】実施例の露光作動開始直前の状態を示した平面
図である。FIG. 3 is a plan view showing a state immediately before the start of an exposure operation according to the embodiment.
【図４】実施例中における主な部材の平面図であって、
夫々、図４（ａ）は後羽根用駆動部材を、図４（ｂ）は
後羽根用作動部材を、図４（ｃ）はセット部材を示した
ものである。FIG. 4 is a plan view of main members in the embodiment,
4A shows a driving member for the rear blade, FIG. 4B shows an operating member for the rear blade, and FIG. 4C shows a set member, respectively.
【図５】実施例における後羽根用駆動部材と後羽根用作
動部材の軸支構成を示した断面図である。FIG. 5 is a cross-sectional view showing a pivotal support structure of a rear blade driving member and a rear blade operating member in the embodiment.
１ シャッタ地板 １ａ 開口部 １ｂ，１ｃ，１ｄ 孔 １ｅ，１ｆ，１ｇ，１ｈ，１ｉ 軸 ２ 補助地板 ３，４ 緩衝部材 ５，６，９，１０ アーム ５ａ，９ａ 長孔 ７，８，１１，１２，１３ 羽根 １４ 先羽根用駆動部材 １４ａ，１８ａ 作動ピン １４ｂ，１７ａ，２２ｄ 被押動部 １４ｃ，１７ｃ 取付部 １５，２１ ばね １６，２０ 鉄片部材 １７ 後羽根用駆動部材 １７Ａ 板部 １７Ｂ 軸部 １７ｂ 折曲部 １８ 後羽根用作動部材 １８ｂ，２２ｃ 係合部 １８ｂ1 円弧面 １９ スペーサー ２２ セット部材 ２２ａ，２２ｂ 押動部 ２２ｅ ピンDESCRIPTION OF SYMBOLS 1 Shutter base plate 1a Openings 1b, 1c, 1d Holes 1e, 1f, 1g, 1h, 1i Axis 2 Auxiliary base plate 3, 4 Buffer member 5, 6, 9, 10 Arm 5a, 9a Slot 7, 8, 11, 12 , 13 blade 14 leading blade driving member 14a, 18a operating pin 14b, 17a, 22d pushed portion 14c, 17c mounting portion 15, 21 spring 16, 20 iron piece member 17 rear blade driving member 17A plate portion 17B shaft portion 17b Bending portion 18 Rear blade operating member 18b, 22c Engagement portion 18b 1 arc surface 19 Spacer 22 Set member 22a, 22b Pushing portion 22e Pin
Claims (3)
って複数枚の羽根を枢支しており該主アームの往復回動
によって露光用開口の開閉作動を行う先羽根群及び後羽
根群と、先羽根群の主アームに連結されていて該主アー
ムと同軸心上で往復回動が可能であり露光作動時には先
羽根用駆動ばねによって回動される先羽根用駆動部材
と、後羽根群の主アームに連結されていて該主アームと
同軸心上で往復回動が可能な後羽根用作動部材と、後羽
根群と後羽根用作動部材とをセット方向に作動させる付
勢ばねと、後羽根群の主アームと同軸心上で往復回動が
可能であって露光作動時に後羽根用駆動ばねによって回
動され後羽根用作動部材を押動し回動させる後羽根用駆
動部材と、セット時に初期位置から作動して先羽根用駆
動部材と後羽根用駆動部材とを前記各駆動ばねに抗して
セット位置へ回動させる前に係合部によって前記付勢ば
ねによる後羽根用作動部材の回動を阻止し先羽根用駆動
部材の露光作動の直前に初期位置へ復帰することによっ
て後羽根用作動部材と後羽根群のセット位置への作動を
可能にするセット部材とを備えていることを特徴とする
カメラ用フォーカルプレンシャッタ。A front blade group and a rear blade group each of which supports a plurality of blades by two arms each including a main arm, and opens and closes an exposure opening by reciprocating rotation of the main arm; A driving member for the front blade, which is connected to the main arm of the front blade group and is capable of reciprocating rotation on the same axis as the main arm, and which is rotated by a driving spring for the front blade during the exposure operation, A rear blade operating member connected to the main arm and reciprocally rotatable coaxially with the main arm; an urging spring for operating the rear blade group and the rear blade operating member in the set direction; A rear blade drive member that is reciprocally rotatable coaxially with the main arm of the blade group and is rotated by the rear blade drive spring during the exposure operation to push and rotate the rear blade operation member; It sometimes operates from the initial position and drives the front blade drive member and rear blade drive Before rotating the member to the set position against each of the drive springs, the engaging portion prevents the biasing spring from rotating the operating member for the rear blade and immediately before the exposure operation of the driving member for the front blade. A focal plane shutter for a camera, comprising: a rear blade operating member by returning to an initial position; and a set member that enables the rear blade group to operate to a set position.
て、該セット部材には、後羽根用駆動部材を押してセッ
ト位置へ作動させる押動部と、後羽根用作動部材のセッ
ト方向への回動を阻止する前記の係合部とが、セット部
材の回動軸の略同じ径方向位置において、該回動軸の軸
方向に二段に形成されていて、且つ該係合部が該押動部
よりもセット作動方向に張り出して形成されていること
を特徴とする請求項１に記載のカメラ用フォーカルプレ
ンシャッタ。2. The set member is capable of reciprocating rotation. The set member has a pushing portion for pushing a rear blade drive member to operate to a set position, and a set direction of the rear blade operating member in a setting direction. The engaging portion for preventing rotation of the set member is formed in two stages in the axial direction of the rotating shaft at substantially the same radial position of the rotating shaft of the set member, and the engaging portion is 2. The focal plane shutter for a camera according to claim 1, wherein the focal plane shutter is formed so as to protrude from the pushing portion in the setting operation direction.
部材とが一体的に構成されていることを特徴とする請求
項１又は２に記載のカメラ用フォーカルプレンシャッ
タ。3. The focal plane shutter for a camera according to claim 1, wherein a main arm of the rear blade group and a rear blade operating member are integrally formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25679497A JP3887468B2 (en) | 1997-09-22 | 1997-09-22 | Focal plane shutter for camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25679497A JP3887468B2 (en) | 1997-09-22 | 1997-09-22 | Focal plane shutter for camera |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1195282A true JPH1195282A (en) | 1999-04-09 |
| JP3887468B2 JP3887468B2 (en) | 2007-02-28 |
Family
ID=17297543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25679497A Expired - Fee Related JP3887468B2 (en) | 1997-09-22 | 1997-09-22 | Focal plane shutter for camera |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3887468B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003066509A (en) * | 2001-08-29 | 2003-03-05 | Nidec Copal Corp | Double light shielding system focal plane shutter for camera |
| JP2010034818A (en) * | 2008-07-29 | 2010-02-12 | Sony Corp | Shutter apparatus and imaging apparatus |
| JP2014178588A (en) * | 2013-03-15 | 2014-09-25 | Canon Inc | Shutter device and imaging device |
-
1997
- 1997-09-22 JP JP25679497A patent/JP3887468B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003066509A (en) * | 2001-08-29 | 2003-03-05 | Nidec Copal Corp | Double light shielding system focal plane shutter for camera |
| JP4667673B2 (en) * | 2001-08-29 | 2011-04-13 | 日本電産コパル株式会社 | Double light-shielding focal plane shutter for cameras |
| JP2010034818A (en) * | 2008-07-29 | 2010-02-12 | Sony Corp | Shutter apparatus and imaging apparatus |
| US7980772B2 (en) | 2008-07-29 | 2011-07-19 | Sony Corporation | Shutter device and image pickup apparatus |
| JP2014178588A (en) * | 2013-03-15 | 2014-09-25 | Canon Inc | Shutter device and imaging device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3887468B2 (en) | 2007-02-28 |
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