JP2606157Y2 - Camera aperture device - Google Patents
Camera aperture deviceInfo
- Publication number
- JP2606157Y2 JP2606157Y2 JP1993043904U JP4390493U JP2606157Y2 JP 2606157 Y2 JP2606157 Y2 JP 2606157Y2 JP 1993043904 U JP1993043904 U JP 1993043904U JP 4390493 U JP4390493 U JP 4390493U JP 2606157 Y2 JP2606157 Y2 JP 2606157Y2
- Authority
- JP
- Japan
- Prior art keywords
- blade
- diaphragm
- aperture
- camera
- main body
- 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.)
- Expired - Lifetime
Links
Landscapes
- Diaphragms For Cameras (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本考案は、ビデオカメラ等の絞り
装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aperture device such as a video camera.
【０００２】[0002]
【従来の技術】従来、ビデオカメラの絞り装置１は、図
１４に示す如く、ズームレンズａとフォーカスレンズｂ
の両レンズ鏡胴間に差し込む形でセットされ、ＣＣＤよ
り成る固体撮像装置ｃより得たビデオの輝度信号に基づ
いて、光量制御装置ｄにより絞り羽根の駆動装置２を制
御し、外光の強弱に適した絞り値（Ｆ値）を得るように
なっている。2. Description of the Related Art Conventionally, as shown in FIG. 14, a diaphragm device 1 of a video camera has a zoom lens a and a focus lens b.
Is set in a form inserted between the two lens barrels, and based on a video luminance signal obtained from a solid-state imaging device c comprising a CCD, a light amount control device d controls a diaphragm blade driving device 2 to control the intensity of external light. An aperture value (F-number) suitable for is obtained.
【０００３】近年カメラの小型化の要請がいよいよ強く
なり、ＣＣＤのサイズも１／２インチから１／３インチ
サイズへと小さくなり、レンズ径、焦点距離も小さくな
ってきた。[0003] In recent years, the demand for smaller cameras has become stronger and stronger, and the size of CCDs has also decreased from 1/2 inch to 1/3 inch, and the lens diameter and focal length have also decreased.
【０００４】[0004]
【考案が解決しようとする課題】ところで、レンズ径や
焦点距離が短小化し、ＣＣＤの大きさが１／２から１／
３インチへと小さくなるにつれて、レンズ鏡筒も一層短
くなり図１３のように羽根駆動装置を羽根の開閉面から
一方向に大きく突出させておく余裕がなくなってきた。However, the lens diameter and the focal length have been reduced, and the size of the CCD has been reduced from １ ／ to 1 /
As the size has decreased to 3 inches, the lens barrel has become shorter, and there is no room for the blade driving device to protrude largely in one direction from the open / close surface of the blade as shown in FIG.
【０００５】羽根駆動装置を小型化すれば、寸法的には
余裕が生じるが、小型化による出力の減少は羽根の開閉
動作にとって好ましくない。If the size of the blade driving device is reduced, there is a margin in dimension, but the reduction in output due to the size reduction is not preferable for the opening and closing operation of the blade.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に本考案のカメラの絞り装置は、受光開口を有するガイ
ド板に開閉自在に支持され、該受光開口を開閉する複数
の絞り羽根と、前記絞り羽根と駆動連結するピン部材を
有する揺動レバーと、該揺動レバーを駆動する駆動軸を
有し、該駆動軸側を前記ガイド板に結合する本体から成
る絞り羽根駆動装置とを具備したカメラの絞り装置にお
いて、前記揺動レバーのピン部材を前記絞り羽根駆動装
置の駆動軸の突出方向と逆方向に形成するとともに、前
記絞り羽根の前記揺動レバーのピン部材との前記駆動連
結する連結部が前記絞り羽根駆動装置の本体結合面とそ
の結合面に対向する本体側面との間に対峙すべく、前記
絞り羽根駆動装置本体が前記ガイド板に結合する結合面
に対し、前記絞り羽根を支持する支持面を前記受光方向
に異ならせように構成したものである。(請求項１)ま
た、前記複数の絞り羽根の前記揺動レバーのピン部材と
の前記駆動連結する複数の連結部が前記絞り羽根駆動装
置の本体結合面とその結合面に対向する本体側面との間
の抱える位置に対峙ように構成したものである。(請求
項２)In order to achieve the above object, an aperture device of a camera according to the present invention is provided with a plurality of aperture blades supported by a guide plate having a light receiving opening so as to be openable and closable, and opening and closing the light receiving opening. An oscillating lever having a pin member that is drivingly connected to the iris blade, and an iris blade driving device having a drive shaft that drives the oscillating lever, the iris blade driving device including a main body having the drive shaft side coupled to the guide plate. In the aperture device for a camera, the pin member of the swing lever is formed in a direction opposite to a projecting direction of a drive shaft of the aperture blade driving device, and the drive connection of the aperture blade to the pin member of the swing lever is performed. The diaphragm blade driving device main body is connected to the guide plate so that the connecting portion facing the main body coupling surface of the diaphragm blade driving device and the main body side surface opposed to the coupling surface. A support surface for supporting the roots is obtained by constituting Ni trying different to the light receiving direction. (Claim 1) In addition, the plurality of connecting portions of the plurality of aperture blades that are drivingly connected to the pin member of the swing lever are connected to a main body coupling surface of the aperture blade driving device and a main body side surface facing the coupling surface. It is configured to face the position held between them. (Claim 2)
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に本考案は、一対のガイド板間に相対的に逆方向に移動
自在に支持されて受光開口を開閉する一対の羽根と、こ
の羽根と平行の平面内で揺動し、両端部に前記羽根と駆
動連結するピン部材を有する揺動レバー、及びこの揺動
レバーを固結する駆動軸を備え、駆動軸側を前記ガイド
板に結合する本体を有する羽根駆動装置とを具備したカ
メラの絞り装置において、前記羽根駆動装置の前記揺動
レバー側端部と、該揺動レバーとは反対側の本体尾部と
の間に、前記羽根の移動面がなるように、前記羽根駆動
装置を前記ガイド板に結合して構成したものである。In order to achieve the above object, the present invention provides a pair of blades which are supported between a pair of guide plates so as to be relatively movable in opposite directions to open and close a light receiving opening, and the blades. A swinging lever having a pin member that swings in a plane parallel to the shaft and has a pin member at both ends for driving connection with the blade, and a drive shaft for fixing the swinging lever, and a drive shaft side is connected to the guide plate. A diaphragm driving device having a blade driving device having a main body, wherein the swinging lever side end of the blade driving device and a main body tail portion on the opposite side to the rocking lever are provided. The blade driving device is connected to the guide plate so that a moving surface is formed.
【０００８】[0008]
【実施例】以下、図面に基づき本考案の一実施例を説明
する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.
【０００９】カメラの絞り装置１００は図１、図２及び
図１１のように、カメラＡのレンズ鏡筒内に光軸と直交
するように挿通され、カメラＡからの被写体輝度信号に
よって適切な絞り開度を与える絞り部６０と、前記輝度
信号に基づき前記絞り部６０の絞り羽根２０，３０を駆
動制御する羽根駆動装置としてのメータ部７０とから成
っている。As shown in FIGS. 1, 2, and 11, the camera aperture device 100 is inserted into the lens barrel of the camera A so as to be orthogonal to the optical axis. The diaphragm unit 60 includes an aperture unit 60 for giving an opening degree, and a meter unit 70 as a blade driving device for controlling the driving of the aperture blades 20 and 30 of the aperture unit 60 based on the luminance signal.
【００１０】絞り部６０は互いに対向配置されたガイド
板の一つとしての地板１０（図３〜図５）ともう一つの
ガイド板としての押え板５０（図９及び図１０）との間
に、第１，第２の羽根２０,３０（図６，図８）を重ね
て配置して相対的に逆方向に移動自在に支持し、更に第
１，第２の羽根２０，３０の間に開放径規制部材４０
（図７）を固定的に配置して構成されている。第１，第
２の羽根２０，３０は、これを地板１０の嵌合用の穴１
０ｂに取り付けた後述のメータ部７０の回動により、正
確には図１３の揺動レバー７１の両端に設けた駆動ピン
７２、７３の旋回動作により相対的に逆方向に駆動し
て、地板１０及び押え板５０の中央に設けた受光開口１
２，５２を羽根２０，３０で開閉するようになってい
る。以下、地板１０と押え板５０の互いに対向する面を
「内面」、他側の面を「外面」として説明する。The squeezing portion 60 is provided between the ground plate 10 (FIGS. 3 to 5) as one of the guide plates and the press plate 50 (FIGS. 9 and 10) as another guide plate. , The first and second blades 20 and 30 (FIGS. 6 and 8) are placed one on top of the other and supported so as to be relatively movable in opposite directions. Open diameter regulating member 40
(FIG. 7) is fixedly arranged. The first and second blades 20 and 30 are fitted with holes 1 for fitting the main plate 10.
By rotating a meter unit 70, which will be described later, attached to the base plate 0b, the driving operation is performed in the opposite direction by turning the drive pins 72, 73 provided at both ends of the swing lever 71 in FIG. And light receiving opening 1 provided at the center of holding plate 50
2, 52 are opened and closed by the blades 20, 30. Hereinafter, the mutually opposing surfaces of the main plate 10 and the holding plate 50 will be referred to as “inner surfaces”, and the other surface will be referred to as “outer surfaces”.
【００１１】地板１０は合成樹脂より成り、図３〜図５
のように、その中央の受光開口１２より後方の面領域に
は、メータ部７０の駆動ピン７２，７３が挿通する一対
の円弧状スリット１３が形成されている。１０ａはメー
タ部７０の取付穴である。The base plate 10 is made of a synthetic resin.
As shown in the figure, a pair of arc-shaped slits 13 through which the drive pins 72 and 73 of the meter section 70 are inserted are formed in the surface area behind the light receiving opening 12 at the center. 10a is a mounting hole for the meter section 70.
【００１２】そして後述のメータ部７０を取り付けるた
めに図４のように径Ｄで深さｅの嵌合用の穴１０ｂが設
けられている。A fitting hole 10b having a diameter D and a depth e is provided as shown in FIG.
【００１３】地板１０の内面には、可動羽根２０，３０
の直線的且つ円滑な往復動作を実現するため、一方の側
壁側に一対の支持部材例えばガイドピン１４,１４が、
また、他方の側壁側に一対の支持部材例えばガイドピン
１５,１５が設けられ、各ガイドピン１４，１５は羽根
２０，３０のガイド穴２１，３１（図６、図８）を挿通
して、羽根２０，３０を安定にガイドしている。更に、
地板１０の内面には、羽根２０，３０との接触面積をで
きるだけ小さくして円滑かつ安定した平行運動を行なわ
せるため、地板１０に近い側の羽根２０を支持する膨出
高さの低い支持突起１６と、地板１０から遠い方の羽根
３０を支持する膨出高さの高い支持突起１７との高低２
種類の支持突起が、それぞれ適数個形成されている。On the inner surface of the main plate 10, movable blades 20, 30 are provided.
In order to realize the linear and smooth reciprocating operation of the pair, a pair of support members, for example, guide pins 14, 14 are provided on one side wall side.
Further, a pair of support members, for example, guide pins 15, 15 are provided on the other side wall side, and the respective guide pins 14, 15 are inserted through guide holes 21, 31 of the blades 20, 30 (FIGS. 6 and 8). The blades 20, 30 are stably guided. Furthermore,
In order to minimize the contact area with the blades 20 and 30 and perform smooth and stable parallel movement, the inner surface of the main plate 10 has a low-bulging support protrusion that supports the blade 20 on the side close to the main plate 10. 16 and a supporting projection 17 having a high bulging height for supporting the blade 30 remote from the main plate 10.
An appropriate number of types of support protrusions are formed.
【００１４】なお、地板１０の両側縁及び後縁には、押
え板５０を地板１０に止めるための係合突起１８が設け
られており、また両側縁には、地板１０をカメラＡに取
り付ける固定穴１９が設けられている。On both side edges and a rear edge of the base plate 10, engagement projections 18 for fixing the holding plate 50 to the base plate 10 are provided. On both side edges, the base plate 10 is fixedly attached to the camera A. A hole 19 is provided.
【００１５】第１の羽根２０は黒色ポリエステルの薄片
から成り、図６のように、中央部に絞り形成用の横ｖ字
状の切欠２２を備えると共に、一方の側縁側には、上記
ガイドピン１４に係合する側縁に平行な長穴より成るガ
イド穴２１を有している。更にこの一方の側縁側の後端
部にはメータ部７０の揺動レバー７１の駆動ピン７２，
７３のうちの一つ７３が挿入枢着されるピン穴２３が形
成されている。The first blade 20 is made of a thin piece of black polyester. As shown in FIG. 6, the first blade 20 has a V-shaped notch 22 for drawing in the center, and the guide pin is provided on one side edge side. It has a guide hole 21 consisting of an elongated hole parallel to the side edge engaged with the hole 14. Further, a driving pin 72 of a swing lever 71 of the meter section 70 is provided at a rear end of the one side edge.
A pin hole 23 into which one of 73 is inserted and pivoted is formed.
【００１６】第２の羽根３０も黒色ポリエステルの薄片
から成り、図８のように、絞り形成用の横ｖ字状の切欠
３２を備えると共に、上述した羽根２０の一方の側縁と
は反対側の他方の側縁側に、ガイドピン１５に係合する
ガイド穴３１を有し、このガイド穴３１も側縁に平行な
長穴として形成されている。更に、このガイド穴３１の
形成された側縁側において、羽根３０の後端部には、メ
ータ部７０の他の駆動ピン８が挿入されるピン穴３３が
形成されている。The second blade 30 is also made of a thin piece of black polyester, and is provided with a notch 32 of a horizontal V-shape for forming an aperture as shown in FIG. 8 and on the opposite side to one side edge of the blade 20 described above. On the other side edge side, there is provided a guide hole 31 that engages with the guide pin 15, and this guide hole 31 is also formed as an elongated hole parallel to the side edge. Further, on the side edge side where the guide hole 31 is formed, a pin hole 33 into which the other drive pin 8 of the meter section 70 is inserted is formed at the rear end of the blade 30.
【００１７】開放径規制部材４０も黒色ポリエステルの
薄片から成り、図７のように、中央部に開放絞り時の口
径を規制する円形の開口４２を有し、また側縁部近傍に
は、上記ガイドピン１４，１５が貫通する位置決め孔４
４，４５を計４箇所に有している。羽根４０は、位置決
め孔４４，４５をガイドピン１４，１５に通すことによ
り、第１，第２の羽根２０，３０の間に固定的に配置さ
れ、またこの挿通により、開放径規制開口４２の受光開
口１２，５２及び切欠２２，３２に対する中心位置合わ
せがなされる。開放径規制開口４２の大きさは、地板１
０及び押え板５０の受光開口１２，５２よりも羽根の切
欠２２，３２が挟む最大円２４，３４の方が小さく、こ
の最大円２４，３４よりも開放径規制開口４２の円の方
が小さい関係になっている。この関係のため、開放絞り
時の口径は、開放径規制部材４０の開口４２の大きさで
規制されることになる。The opening diameter regulating member 40 is also made of a thin piece of black polyester. As shown in FIG. 7, it has a circular opening 42 at the center for regulating the aperture at the time of the open drawing. Positioning hole 4 through which guide pins 14 and 15 pass
4, 45 at a total of four locations. The blade 40 is fixedly disposed between the first and second blades 20 and 30 by passing the positioning holes 44 and 45 through the guide pins 14 and 15, and the insertion of the opening diameter regulating opening 42 is performed by this insertion. The center alignment with respect to the light receiving openings 12 and 52 and the notches 22 and 32 is performed. The size of the opening diameter regulating opening 42 is
The maximum circles 24, 34 sandwiched by the blade cutouts 22, 32 are smaller than the light receiving openings 12, 52 of the holding plate 50, and the open diameter regulating opening 42 is smaller than the maximum circles 24, 34. In a relationship. Because of this relationship, the aperture at the time of the aperture stop is regulated by the size of the opening 42 of the aperture diameter regulating member 40.
【００１８】押え板５０はアルミニウムの板から成り、
図９のようにメータ部７０に対応する切欠凹所５１と、
地板１０の受光開口１２に対向する受光開口５２と、ス
リット１３に対向する一対の円弧状のスリット５３と、
ガイドピン１４，１５に対向するピン穴５４，５５とを
備えている。The holding plate 50 is made of an aluminum plate.
As shown in FIG. 9, a notch recess 51 corresponding to the meter section 70,
A light receiving opening 52 facing the light receiving opening 12 of the base plate 10, a pair of arc-shaped slits 53 facing the slit 13,
Pin holes 54, 55 facing the guide pins 14, 15 are provided.
【００１９】また、羽根との接触面積をできるだけ小さ
くして円滑かつ安定した平行運動を行なわせるため、内
面には、押え板５０に近い側の羽根３０を支持する膨出
高さの低い支持突起５６と、押え板５０から遠い方の羽
根２０を支持する膨出高さの高い支持突起５７とが、プ
レス加工により形成されている。Further, in order to make the contact area with the blade as small as possible and to carry out a smooth and stable parallel movement, a support projection having a low bulging height for supporting the blade 30 on the side close to the holding plate 50 is provided on the inner surface. The supporting projection 57 having a high bulging height and supporting the blade 20 farther from the presser plate 50 is formed by press working.
【００２０】この押え板５０は、側縁及び後縁に設けた
係合耳部５８の穴５８ａを、上記係合突起１８に係合さ
せることにより地板１０に固定される。この形態は、ビ
ス等の補助部材を用いることなく、係合耳部５８の折り
曲げのみによって押え板５０を地板１０に固定できる利
点を有する。The holding plate 50 is fixed to the base plate 10 by engaging the holes 58a of the engagement ears 58 provided on the side and rear edges with the engagement projections 18. This form has an advantage that the holding plate 50 can be fixed to the base plate 10 only by bending the engaging ears 58 without using an auxiliary member such as a screw.
【００２１】一方羽根駆動装置としてのメータ部７０は
一対のボビン及び尾端部材によって回動自在に支持され
た駆動軸７４を有し、この駆動軸７４には永久磁石が固
設されている。そしてこの永久磁石を囲むように前記ボ
ビンに駆動コイルと制動コイルとを巻回し、一方ボビン
の外周を磁路形成手段としてのヨークを装着して構成し
た周知のものである。以後このボビン、ヨーク及び尾端
部材等、外殻構成部材で外部から視認される全体をメー
タ部の本体７５と称することとする。しかして駆動軸７
４はこの本体７５の一方から突出しており、この駆動軸
７４が突出している方の反対側を本体尾部７５ａと称す
ることとする。なお本体７５の外径は地板１０の嵌合用
の穴２５の直径Ｄに丁度嵌まるように形成されている。On the other hand, the meter section 70 as a blade drive device has a drive shaft 74 rotatably supported by a pair of bobbins and a tail end member, and a permanent magnet is fixed to the drive shaft 74. A drive coil and a braking coil are wound around the bobbin so as to surround the permanent magnet, and a yoke as a magnetic path forming means is mounted on the outer periphery of the bobbin. Hereinafter, the whole of the bobbin, the yoke, the tail end member, and the like, which is visually recognized from the outside by the outer shell constituting member, will be referred to as the main body 75 of the meter section. Then drive shaft 7
4 protrudes from one side of the main body 75, and the opposite side of the side from which the drive shaft 74 protrudes is referred to as a main body tail portion 75a. The outer diameter of the main body 75 is formed so as to fit exactly into the diameter D of the fitting hole 25 of the main plate 10.
【００２２】駆動軸７４の先端部には各羽根２０，３０
に駆動力を伝える揺動レバー７１が固結されている。そ
してこの揺動レバー７１の両端部には一対の駆動ピン７
２，７３が配設されている。Each of the blades 20, 30 is provided at the tip of the drive shaft 74.
The swing lever 71 for transmitting the driving force to the swing lever 71 is fixed. A pair of drive pins 7 are provided at both ends of the swing lever 71.
2, 73 are provided.
【００２３】駆動ピン７２、７３は図２のように揺動レ
バー７１から本体尾部７５ａの方に向けて伸びている。The drive pins 72 and 73 extend from the swing lever 71 toward the tail part 75a of the main body as shown in FIG.
【００２４】絞り部６０とメータ部７０とは上記のよう
に構成されているから、両者はカメラの絞り装置１００
として図２のように組み立てられる。Since the aperture unit 60 and the meter unit 70 are configured as described above, both are connected to the aperture device 100 of the camera.
And assembled as shown in FIG.
【００２５】すなわち、メータ部７０の本体７５は地板
１０の前記嵌合用穴１０ｂに嵌入されるとともに、各羽
根２０，３０及び開放径規制部材４０を装入し、押え板
５０を本体７５の尾部７５ａ側から地板１０へ向けて嵌
着させる。そして駆動軸７４に固定された揺動レバー７
１からはメータ部７０の本体尾部７５ａの方向に向けて
駆動ピン７２，７３を装着する。That is, the main body 75 of the meter section 70 is fitted into the fitting hole 10b of the base plate 10, and the blades 20, 30 and the opening diameter regulating member 40 are inserted. It is fitted toward the main plate 10 from the 75a side. The swing lever 7 fixed to the drive shaft 74
From 1, the drive pins 72 and 73 are attached toward the main body tail portion 75 a of the meter unit 70.
【００２６】上記のようにして組み立てることによっ
て、図２に示すように羽根２０，３０からメータ部７０
の揺動レバー７１側端部、つまり駆動軸７４の先端まで
の距離ｈ1と、同じく本体尾部７５ａまでの距離ｈ2と
は、 ｈ1≒ｈ2 となり、これはつまり前記駆動軸７４の先端から尾部７
５ａまでの全長Ｈのほぼ中央に羽根２０，３０が位置し
ていることとなる。これを更に絞り装置１００全体の観
点から見ると、絞り部６０に対して羽根駆動装置として
のメータ部７０は前後にほぼ同じ程度の突出量をもって
組み込まれていると言うことができる。 ＜作用＞ 上記構成において、絞り装置１００は、図１１のように
鏡筒本体装着穴に光軸を横切って挿入され、位置決め
後、穴１９を介して鏡筒本体の穴にねじで固定される。By assembling as described above, as shown in FIG.
71 end of the swing lever, i.e. the distance h 1 to the tip of the drive shaft 74, is like the distance h 2 to the main tail 75a, the tip of h 1 ≒ h 2 becomes, which means that the drive shaft 74 To tail 7
The blades 20, 30 are located at substantially the center of the entire length H up to 5a. If this is further viewed from the viewpoint of the entire diaphragm device 100, it can be said that the meter portion 70 as the blade drive device is incorporated in the diaphragm portion 60 with substantially the same amount of protrusion in the front and rear. <Operation> In the above configuration, the diaphragm device 100 is inserted across the optical axis into the lens barrel main body mounting hole as shown in FIG. 11, and is fixed to the hole of the lens barrel main body via the hole 19 after positioning. .
【００２７】絞り部６０に対して羽根駆動装置としての
メータ部７０は前後にほぼ同じ程度の突出量をもって組
み込まれているから、図１１のようにＣＣＤから先の鏡
筒全体の長さＬ1が短くなり、特に絞り部６０から前記
ＣＣＤまでの距離が短小になっても、羽根駆動装置とし
てのメータ部７０自体を小型にする必要はなく、従って
羽根駆動装置としての出力が低下しない。[0027] Since the meter unit 70 serving as a blade drive device with respect to the diaphragm portion 60 is incorporated with a projection amount of approximately the same extent in the longitudinal, CCD from the entire previous barrel length L 1 as shown in FIG. 11 In particular, even if the distance from the diaphragm unit 60 to the CCD becomes short, it is not necessary to reduce the size of the meter unit 70 itself as a blade driving device, and therefore, the output of the blade driving device does not decrease.
【００２８】このような状態において、マニュアル動作
により開放径以外の絞り値が設定されると、この設定値
に対応した出力が得られ、メータ部７０の駆動コイルが
励磁されて駆動軸７４が回動し、駆動ピン７２，７３
が、例えば図１において右回りに回動する。すると、第
１の羽根２０はガイドピン１４に案内されて左側へ移動
し、第２の羽根３０はガイドピン１５に案内されて右側
へ移動する。In such a state, when an aperture value other than the open diameter is set by a manual operation, an output corresponding to the set value is obtained, the drive coil of the meter section 70 is excited, and the drive shaft 74 is turned. Move and drive pins 72 and 73
Rotates clockwise in FIG. 1, for example. Then, the first blade 20 is guided by the guide pin 14 and moves to the left, and the second blade 30 is guided by the guide pin 15 and moves to the right.
【００２９】これにより、互いに対向する横Ｖ字状の切
欠２２及び３２が接近し、両切欠により羽根４０の開放
径規制開口よりも小さ開口が形成され、設定された絞り
値（Ｆ値）に対応する絞り開口が形成される。As a result, the V-shaped notches 22 and 32 facing each other approach each other, and an opening smaller than the opening diameter regulating opening of the blade 40 is formed by both notches, so that the set aperture value (F value) is obtained. A corresponding aperture is formed.
【００３０】かかる動作において、可動羽根２０又は３
０と固定羽根４０との間には殆ど隙間が存在せず、ま
た、中間に位置する固定羽根４０は事実上無視しうるほ
どに薄い。このため、小さく絞った場合にも、斜めの光
線の入射によるシェーデング現象は発生しない。従って
画像の影響、解像度の低下を避けることができる。ま
た、前玉レンズと後玉レンズの間に入る開放径は、固定
羽根４０の開口４２という不動の１点のみであるため、
これをレンズの設計上の基準点とすることができる。即
ち、開放径をレンズ設計上の基準位置に一致させ、ＣＣ
Ｄに入る光の領域を一定化することができる。In this operation, the movable blade 20 or 3
There is almost no gap between 0 and the fixed blade 40, and the fixed blade 40 located in the middle is virtually negligibly thin. Therefore, even when the aperture is narrowed down, the shading phenomenon due to the incidence of oblique light does not occur. Therefore, it is possible to avoid the influence of an image and a decrease in resolution. In addition, since the opening diameter which enters between the front lens and the rear lens is only one fixed point of the opening 42 of the fixed blade 40,
This can be used as a reference point in lens design. That is, the open diameter is matched with the reference position in the lens design,
The area of light entering D can be made constant.
【００３１】次に、絞り値（Ｆ値）を“開放”に設定す
ると、第１及び第２の羽根１０及び２０は、図１の状態
になる。互いに対向する横Ｖ字状の切欠２２及び３２が
最外位置に駆動され、両切欠により形成される開口は図
６，図８に示す円２４，３４をカバーするように大きく
なる。従って、この円２４，３４よりも小さい円として
中間に位置する羽根４０の開放径規制開口４２が有効と
なり、該開口４２による開口が形成され、設定された開
放絞り値（Ｆ値）が得られる。Next, when the aperture value (F value) is set to "open", the first and second blades 10 and 20 are in the state shown in FIG. The V-shaped notches 22 and 32 facing each other are driven to the outermost positions, and the openings formed by the notches are enlarged so as to cover the circles 24 and 34 shown in FIGS. Therefore, the opening diameter regulating opening 42 of the blade 40 located in the middle as a circle smaller than the circles 24 and 34 becomes effective, an opening formed by the opening 42 is formed, and a set open aperture value (F value) is obtained. .
【００３２】なお上記実施例ではビデオカメラの絞り装
置を例にしたが、本装置はスチルカメラにも適用するこ
とができる。In the above embodiment, the aperture device of the video camera is taken as an example. However, the present device can be applied to a still camera.
【００３３】[0033]
【考案の効果】以上要するに本考案のカメラの絞り装置
は、羽根の移動面が羽根駆動装置の揺動レバー側端部
と、この揺動レバーとは反対側の本体尾部との間になる
ように、羽根駆動装置を前記ガイド板に結合して構成し
たから、羽根駆動装置自体を小型化することなく、しか
も極く小型化されたカメラに対しても余裕をもって装着
することが可能となった。In summary, the camera diaphragm device of the present invention has a blade moving surface between the swing lever side end of the blade drive device and the main body tail opposite to the swing lever. In addition, since the blade drive device is connected to the guide plate, the blade drive device itself can be mounted on a very miniaturized camera without any downsizing. .
【図１】本考案の一実施例における絞り装置の押え板を
除去した正面図である。FIG. 1 is a front view of a diaphragm device according to an embodiment of the present invention with a holding plate removed.
【図２】図１に於けるII〜II断面矢視図である。FIG. 2 is a sectional view taken along arrows II-II in FIG.
【図３】同じく絞り装置を構成する地板の正面図であ
る。FIG. 3 is a front view of a main plate constituting the drawing device.
【図４】図２の地板の断面図である。FIG. 4 is a sectional view of the main plate of FIG. 2;
【図５】図２の地板の背面図である。FIG. 5 is a rear view of the main plate of FIG. 2;
【図６】第１の羽根の正面図である。FIG. 6 is a front view of the first blade.
【図７】開放径規制部材の形状を示す図である。FIG. 7 is a diagram showing a shape of an opening diameter regulating member.
【図８】第２の羽根の正面図である。FIG. 8 is a front view of a second blade.
【図９】押え板の正面図である。FIG. 9 is a front view of a holding plate.
【図１０】押え板の側面図である。FIG. 10 is a side view of the holding plate.
【図１１】カメラに絞り装置を装着した状態の説明図で
ある。FIG. 11 is an explanatory diagram of a state where an aperture device is mounted on a camera.
【図１２】図１１に示したカメラの要部正面図である。FIG. 12 is a front view of a main part of the camera shown in FIG. 11;
【図１３】揺動レバーの側面図である。FIG. 13 is a side view of the swing lever.
【図１４】従来のビデオカメラにおける絞り装置の装着
状態の説明図である。FIG. 14 is an explanatory diagram of a mounted state of a diaphragm device in a conventional video camera.
１００ カメラの絞り装置 ６０ 絞り部 ７０ メータ部（羽根駆動装置） ７１ 揺動レバー ７２ 駆動ピン ７３ 駆動ピン ７４ 駆動軸 ７５ メータ部本体 ７５ａ 本体尾部 １０ 地板（ガイド板） １２ 受光開口 ２０ 羽根 ３０ 羽根 ５０ 押え板（ガイド板） ５２ 受光開口 Ｈ メータ部本体の全長 ｈ1，ｈ2 ｈ1≒ｈ2，Ｈ＝ｈ1＋ｈ2 Ｌ1 鏡筒の長さ Ｌ2 ＣＣＤから絞り部までの長さREFERENCE SIGNS LIST 100 stop device for camera 60 stop unit 70 meter unit (blade driving device) 71 swing lever 72 drive pin 73 drive pin 74 drive shaft 75 meter unit main body 75 a main unit tail 10 base plate (guide plate) 12 light receiving opening 20 blade 30 blade 50 holding plate (guide plate) 52 receiving aperture H meter section overall length h 1, h 2 h 1 ≒ h 2, H = h 1 + h 2 L 1 length length from L 2 CCD to the throttle portion of the barrel body
Claims (2)
持され、該受光開口を開閉する複数の絞り羽根と、 前記絞り羽根と駆動連結するピン部材を有する揺動レバ
ーと、 該揺動レバーを駆動する駆動軸を有し、該駆動軸側を前
記ガイド板に結合する本体から成る絞り羽根駆動装置と
を具備したカメラの絞り装置において、前記揺動レバーのピン部材を前記絞り羽根駆動装置の駆
動軸の突出方向と逆方向に形成するとともに、 前記絞り羽根の前記揺動レバーのピン部材との前記駆動
連結する連結部が前記絞り羽根駆動装置の本体結合面と
その結合面に対向する本体側面との間に対峙すべく、前
記絞り羽根駆動装置本体が前記ガイド板に結合する結合
面に対し、前記絞り羽根を支持する支持面を前記受光方
向に異ならせた ことを特徴とするカメラの絞り装置。1. A swinging lever having a plurality of aperture blades supported by a guide plate having a light receiving opening so as to be openable and closable to open and close the light receiving opening; a swing lever having a pin member drivingly connected to the aperture blade; a drive shaft for driving the, in the camera of the diaphragm apparatus and a diaphragm blade driving device comprising a main body for coupling the drive shaft side to the guide plate, the diaphragm blade driving device pin member of said rocking lever No drive
The drive shaft is formed in the direction opposite to the projecting direction of the driving shaft, and the driving of the diaphragm blade with the pin member of the swing lever is performed.
A connecting portion to be connected is connected to a main body connecting surface of the diaphragm blade driving device.
In order to face between the side of the main body facing the joint surface,
A coupling in which the diaphragm blade drive device body is coupled to the guide plate
The support surface that supports the aperture blade is
An aperture device for a camera, characterized by different directions .
ピン部材との前記駆動連結する複数の連結部が前記絞り
羽根駆動装置の本体結合面とその結合面に対向する本体
側面との間の抱える位置に対峙してなることを特徴とす
る請求項１記載のカメラの絞り装置。2. The swing lever of the plurality of diaphragm blades.
A plurality of connecting portions for driving and connecting with a pin member are connected to the throttle.
Body connection surface of blade drive device and body facing the connection surface
2. A diaphragm device for a camera according to claim 1, wherein the diaphragm device faces a position held between the camera and the side surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993043904U JP2606157Y2 (en) | 1993-07-16 | 1993-07-16 | Camera aperture device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993043904U JP2606157Y2 (en) | 1993-07-16 | 1993-07-16 | Camera aperture device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0710729U JPH0710729U (en) | 1995-02-14 |
| JP2606157Y2 true JP2606157Y2 (en) | 2000-09-25 |
Family
ID=12676703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1993043904U Expired - Lifetime JP2606157Y2 (en) | 1993-07-16 | 1993-07-16 | Camera aperture device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2606157Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5749752B1 (en) * | 1971-11-25 | 1982-10-23 | ||
| JPS5369623U (en) * | 1976-11-12 | 1978-06-12 | ||
| JP4522691B2 (en) * | 2003-11-20 | 2010-08-11 | 日本電産コパル株式会社 | Camera blade drive |
-
1993
- 1993-07-16 JP JP1993043904U patent/JP2606157Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0710729U (en) | 1995-02-14 |
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