JP2776714B2 - Aperture device - Google Patents
Aperture deviceInfo
- Publication number
- JP2776714B2 JP2776714B2 JP33584192A JP33584192A JP2776714B2 JP 2776714 B2 JP2776714 B2 JP 2776714B2 JP 33584192 A JP33584192 A JP 33584192A JP 33584192 A JP33584192 A JP 33584192A JP 2776714 B2 JP2776714 B2 JP 2776714B2
- Authority
- JP
- Japan
- Prior art keywords
- spring
- guide shaft
- center
- lever
- drive
- 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】本発明は、バネ力を利用して回転
運動する駆動レバーを備えた絞り装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diaphragm device provided with a drive lever which rotates by using a spring force.
【０００２】[0002]
【従来の技術】従来、ビデオカメラ等の光学機器の絞り
装置として図７に示される構造の絞り装置が知られてい
る。2. Description of the Related Art Conventionally, a diaphragm device having a structure shown in FIG. 7 is known as a diaphragm device for an optical apparatus such as a video camera.
【０００３】図７において、１０は絞り装置の地板、１
２及び１３は絞り羽根、１５は絞り装置のカバー、９は
絞り羽根駆動用電磁アクチュエータの回転子であるとこ
ろのマグネットロータ、７及び８は該アクチュエータの
ステータであるところのコイル、６は該アクチュエータ
のステータを構成するヨーク、５は該マグネットロータ
９の軸の一方を支持する軸受けキャップ、２及びは該ア
クチュエータへの給電線及び制御部品を搭載している配
線基板、４は該配線基板２及び３上の電気回路に接続さ
れる外部電気信号接点、７は絞り羽根１２及び１３の動
作位置を検出するためのホール素子、２０は該マグネッ
トロータ９の軸９ａに固着されて該軸９ａとともに往復
回動する駆動レバー、１４は絞り羽根１２及び１３の絞
り開口縁に取付けられるＮＤフィルター、１１は該駆動
レバー２０の中心の凹部に嵌装されて該駆動レバー２０
に回転方向に付勢力を与えるためのバネ、である。[0003] In FIG. 7, reference numeral 10 denotes a base plate of a drawing device;
2 and 13 are aperture blades, 15 is a cover of the aperture device, 9 is a magnet rotor which is a rotor of an electromagnetic actuator for driving the aperture blades, 7 and 8 are coils which are stators of the actuator, and 6 is the actuator. , 5 is a bearing cap for supporting one of the shafts of the magnet rotor 9, 2 is a wiring board on which a power supply line to the actuator and control components are mounted, 4 is the wiring board 2 and An external electric signal contact connected to an electric circuit on 3 is a Hall element for detecting the operating position of the aperture blades 12 and 13, 20 is fixed to a shaft 9a of the magnet rotor 9 and reciprocates together with the shaft 9a. A rotating drive lever, 14 is an ND filter attached to the aperture opening edge of the aperture blades 12 and 13, and 11 is a center of the drive lever 20. Is fitted in the recess the drive lever 20
And a spring for applying a biasing force in the rotational direction to the spring.
【０００４】図４は駆動レバー２０の中心部とバネ１１
とを示す拡大図である。FIG. 4 shows the center of the drive lever 20 and the spring 11.
FIG.
【０００５】図４において、２０ｂはマグネットロータ
９の軸９ａに嵌合されたバネ案内棒であり、バネの巻き
締り等を考慮してその外径はバネの内径より小さいもの
となっている。また、２０ｄ及び２０ｅはバネが作動中
にはずれないように押えてあるツバであり、バネの外径
よりも大きいものとなっている。なお、ツバ２０ｄ及び
の形状と数は使用される状態に最適な形状及び数とし、
ツバ２０ｄと２０ｅが一体物となっていてもよい。In FIG. 4, reference numeral 20b denotes a spring guide rod fitted to the shaft 9a of the magnet rotor 9, and its outer diameter is smaller than the inner diameter of the spring in consideration of the tightening of the spring. Reference numerals 20d and 20e denote flanges which hold the spring so as not to come off during operation, and have a larger diameter than the outer diameter of the spring. In addition, the shape and the number of the flange 20d and the shape and the number optimal for the state of use,
The flanges 20d and 20e may be integrated.
【０００６】バネ１１の作動固定点となるバネ係止端１
１ａは絞り装置地板１０に立設されたビスねじ込み用ポ
スト１０ａに係止されている。Spring locking end 1 serving as an operation fixing point of spring 11
Reference numeral 1a is engaged with a screw screwing post 10a provided on the squeezing device base plate 10.
【０００７】また、もう一つのバネ係止端１１ｂは駆動
レバー２０に形成された係止部２０ｃにより係止されて
いる。The other spring locking end 11b is locked by a locking portion 20c formed on the drive lever 20.
【０００８】[0008]
【発明が解決しようとする課題】上記従来例では、駆動
レバー２０のバネ収納部の案内棒２０ｂの外径がバネの
内径より小さいのでバネが倒れてしまうため、次のよう
な欠点があった。In the above conventional example, since the outer diameter of the guide rod 20b of the spring accommodating portion of the driving lever 20 is smaller than the inner diameter of the spring, the spring falls down. .
【０００９】（１）バネの倒れ量は巻き締りが最も少な
い時が最大で、巻き締り量が増加すると倒れ量も小さく
なってくる。しかし、図５に示すようにバネと駆動レバ
ーのバネ収納部との接触点には摩擦力μが働いているた
め、次のような現象が生じる。いま、バネが徐々に巻き
締っていき、バネ１１の倒れが少なくなる方向に力Ｆが
働いた場合、この力Ｆは巻き締り量の増加に応じて増加
していき、摩擦力μより大きくなった時点で急激にバネ
１１の倒れ量が変化する。バネ１１の倒れ量が変化する
と、バネ定数が変化し、バネ１１の戻し力の特性も変化
する。バネ１１の戻し力はバネ定数が変化しなければ一
定の変化率で増減する。しかし、倒れ量が変化するとバ
ネ定数も変化し、しかも急激な変化は戻し力の変曲点と
なる。そのため、バネの必要最小戻し力にバネを設定す
ると最大戻し力が必要以上に大きくなり、余分な駆動力
が必要となり、駆動源の大きさの増大化、エネルギーの
増大化、となる。(1) The amount of fall of the spring is maximum when the tightening of the winding is the minimum, and the amount of leaning decreases as the amount of tightening of the spring increases. However, as shown in FIG. 5, since the frictional force μ acts on the contact point between the spring and the spring housing portion of the drive lever, the following phenomenon occurs. Now, when the spring gradually tightens and the force F acts in the direction in which the fall of the spring 11 decreases, the force F increases with the increase in the tightening amount and is larger than the frictional force μ. At this point, the amount of fall of the spring 11 rapidly changes. When the amount of inclination of the spring 11 changes, the spring constant changes, and the characteristic of the return force of the spring 11 also changes. The return force of the spring 11 increases and decreases at a constant rate unless the spring constant changes. However, when the amount of tilt changes, the spring constant also changes, and a sharp change becomes an inflection point of the return force. Therefore, if the spring is set to the necessary minimum return force of the spring, the maximum return force becomes larger than necessary, and an extra drive force is required, resulting in an increase in the size of the drive source and an increase in energy.
【００１０】（２）（１）の作用により、駆動レバー２
０の回転運動にムラが生じ、急激に変化する変曲点が発
生し、目的とする作用に不具合を生じる。例えば、位置
決め、移動を目的とする場合は変曲点により正確な位置
決めや移動が困難になったり、バネ応答に遅れを生じ
る。また、該絞り装置により光量を調整する場合には、
急激に光量が変化して画像が光量ムラを起こし、目的と
する画像が得られなかったりする。また、摩擦力μはバ
ネ１１や収納部の個々の表面状態のバラツキ、温度、湿
度などの環境条件により変化するためバネ１１の変曲点
が変わり、どの時点で変曲点が発生するか予想できない
ため、該絞り装置の制御系で対策を行うのも困難であ
る。(2) The operation of the drive lever 2
The rotation motion of 0 becomes uneven, and an inflection point that changes rapidly occurs, thereby causing a problem in the intended operation. For example, when aiming for positioning and movement, it is difficult to perform accurate positioning and movement due to an inflection point, and a delay occurs in a spring response. When adjusting the light amount by the aperture device,
The amount of light rapidly changes, causing unevenness in the amount of light in the image, and a desired image may not be obtained. Further, since the frictional force μ changes depending on environmental conditions such as variations in the surface condition of the spring 11 and the storage unit, temperature, humidity, etc., the inflection point of the spring 11 changes, and it is estimated at which point the inflection point occurs. Therefore, it is difficult to take countermeasures in the control system of the aperture device.
【００１１】（３）バネ１１の倒れは案内棒２０ｂで規
制されるため、バネ１１の一部が案内棒２０ｂに接触
し、駆動レバー２０の往復運動により、一部に負荷がか
かり、摩耗が起り、バネ１１の一部が案内棒２０ｂにく
い込み、耐久性の低下、駆動エネルギーの増大化を起こ
す（図６参照）。また、食い込む分だけ倒れ量も増加す
る。(3) Since the fall of the spring 11 is restricted by the guide rod 20b, a part of the spring 11 comes into contact with the guide rod 20b, and a part of the spring 11 reciprocates, so that a load is applied to the part and wear is caused. This causes a part of the spring 11 to be caught in the guide rod 20b, lowering the durability and increasing the driving energy (see FIG. 6). In addition, the amount of fall increases by the amount of bite.
【００１２】（４）バネが倒れることにより、バネ収納
部のバネ押えのツバ２０ｂ及び２０ｅから外側にバネの
内径が出る可能性が大きくなり、作動による衝撃、外部
からの衝撃及び振動によって収納部からバネが外れる可
能性が大きくなる。(4) The fall of the spring increases the possibility that the inner diameter of the spring will come out of the spring holding flanges 20b and 20e of the spring storage part, and the storage part is caused by an impact due to operation, external shock and vibration. There is a greater possibility that the spring will come off.
【００１３】本発明の目的は、前述の従来例における問
題点を解決し、改良された駆動レバーを提供することで
ある。An object of the present invention is to solve the above-mentioned problems in the prior art and to provide an improved drive lever.
【００１４】 上記の目的を達成するために、本願発明
では、絞り羽根と、駆動源と、前記駆動源の駆動力を前
記絞り羽根に伝達する駆動レバーと、前記駆動レバーに
付勢力を与えるバネとを有する絞り装置において、前記
駆動レバーに前記バネの内径より小さい径のバネ案内軸
を形成し、このバネ案内軸の中心位置を前記駆動レバー
の回動中心位置と異なる位置に設定している。なお、前
記バネ案内軸の外周に、外側へ突出する一対のツバ（大
きさが異なってもよい）を互いに対称となる位置に設
け、前記バネ案内軸の中心を、一対のツバの中心を結ぶ
線上であって、前記駆動レバーの回動中心からずれた位
置（ツバの大きさが異なる場合は大きいツバの方にずれ
た位置）に設定するようにしてもよい。また、本願発明
では、絞り羽根と、駆動源と、前記駆動源の駆動力を絞
り羽根に伝達する駆動レバーと、前記駆動レバーに付勢
力を与えるバネとを有する絞り装置において、前記駆動
レバーに前記バネの内径より小さい径のバネ案内軸を形
成し、このバネ案内軸の外周に突起を設けて前記バネ案
内軸に対する前記バネの位置を偏らせるようにしてい
る。すなわち、これら本願発明では、バネ案内軸の中心
を駆動レバーの中心と異なる位置に配置するかもしくは
バネ案内軸を異形（円柱形以外の断面形状）にすること
により、バネの倒れをなくしたり最小に抑えたりするこ
とができるようにしている。In order to achieve the above object, according to the present invention, an aperture blade, a driving source, a driving lever for transmitting a driving force of the driving source to the aperture blade, and a spring for applying an urging force to the driving lever are provided. A spring guide shaft having a diameter smaller than the inner diameter of the spring is formed on the drive lever, and the center position of the spring guide shaft is set to a position different from the rotation center position of the drive lever. . In addition, a pair of flanges (which may be different in size) protruding outward are provided on the outer periphery of the spring guide shaft at symmetrical positions, and the center of the spring guide shaft is connected to the center of the pair of collars. The position may be set on a line and shifted from the center of rotation of the drive lever (if the size of the collar is different, the position is shifted toward the larger collar). Further, according to the present invention, in a diaphragm device having a diaphragm blade, a driving source, a driving lever for transmitting a driving force of the driving source to the diaphragm blade, and a spring for applying a biasing force to the driving lever, A spring guide shaft having a diameter smaller than the inner diameter of the spring is formed, and a projection is provided on the outer periphery of the spring guide shaft so as to bias the position of the spring with respect to the spring guide shaft. That is, in these inventions of the present application, by disposing the center of the spring guide shaft at a position different from the center of the drive lever or by making the spring guide shaft a deformed shape (a cross-sectional shape other than a columnar shape), the fall of the spring can be eliminated or minimized. So that it can be suppressed.
【００１５】[0015]
【作用】本発明の駆動レバーによれば、（１）最大戻し
力が小さくなり駆動力が少なくなるため駆動源を、小さ
くでき、または小さなエネルギーで作動可能となる、
（２）バネと案内棒の接触点が大きくなり、接触力が分
散されるため、摩耗が減り耐久性が向上する、（３）バ
ネの倒れがないため、バネ収納部のバネ押えのツバを小
さくでき、場合により廃止することも可能となり、従っ
て組立加工性の向上、利用装置の小型化もできる、等の
種々の効果が得られる。According to the drive lever of the present invention, (1) the maximum return force is reduced and the drive force is reduced, so that the drive source can be made smaller or can be operated with small energy.
(2) The contact point between the spring and the guide rod is increased and the contact force is dispersed, so that wear is reduced and durability is improved. (3) Since there is no fall of the spring, the spring holding part of the spring storage part must be Various effects can be obtained, such as reduction in size and, in some cases, abolishment, and therefore, improvement in assembling workability and downsizing of a utilization device.
【００１６】[0016]
【実施例】以下に本発明の実施例を説明する。Embodiments of the present invention will be described below.
【００１７】（実施例１）図１に於いて、１０ａは絞り
装置地板１０に形成されたバネ係止部材である。１１は
バネであり、２０はバネ収納部を設けた回転運動部材と
しての駆動レバーである。(Embodiment 1) In FIG. 1, reference numeral 10a denotes a spring locking member formed on a diaphragm device base plate 10. Reference numeral 11 denotes a spring, and reference numeral 20 denotes a drive lever as a rotating member provided with a spring housing.
【００１８】バネ１１は駆動レバー２０に収納され、作
動時に外れないようにツバ２０ｄ及び２０ｅによって押
えられている。バネ係止端１１ｂは駆動レバー２０のバ
ネ係止部２０ｃにより形成されている。また、もう一方
のバネ係止端１１ａは駆動レバー２０の外にあるバネ係
止部材１０ａにより係止されている。The spring 11 is housed in the drive lever 20, and is pressed by the flanges 20d and 20e so as not to come off during operation. The spring engagement end 11b is formed by a spring engagement portion 20c of the drive lever 20. The other spring locking end 11a is locked by a spring locking member 10a outside the drive lever 20.
【００１９】駆動レバー２０のバネ収納部に設けられた
案内棒（請求の範囲にいうバネ案内軸）２０ｆは、その
中心２０ｇが駆動レバー２０の回転中心に取付けられた
駆動軸９ａの中心より距離ｍ及びｒだけ離れている。案
内棒２０ｆの中心はバネ１１の２本の係止端１１ａと１
１ｂのなす角度θの１／２方向に設定されている。The guide rod (spring guide shaft) 20f provided in the spring housing portion of the drive lever 20 has a center 20g at a distance from the center of the drive shaft 9a attached to the rotation center of the drive lever 20. separated by m and r. The center of the guide rod 20f is located at the two locking ends 11a and 1 of the spring 11.
1b is set to half the angle θ.
【００２０】図１の状態を初期状態とし、駆動力により
Ｚ１の方向に駆動レバー２０が回転移動するとした場
合、初期状態でバネ１１は１／２θの方向に倒れようと
力が働く。しかし、案内棒２０ｆを１／２θの方向に移
動させて設置しているため、倒れは起こらない。この状
態でバネ１１はツバ２０ｅ側は案内棒２０ｆに接触して
いるが、ツバ２０ｄ側は離れている。Ｚ１方向に回転す
ると角度θは小さくなるがバネ１１の倒れる方向は初期
同様１／２θの方向となる。そのため、バネ１１は回転
位置全点で倒れが修正される。角度θの減少により、バ
ネ１１の内径φＳは減少するが最小内径φＳ′より案内
棒２０ｆの径φｔを小さくすることにより巻き締りの弊
害は起らない。In the initial state shown in FIG. 1, when the driving lever 20 is rotated in the direction of Z1 by the driving force, the spring 11 exerts a force in the initial state so as to fall in the direction of 1 / 2θ. However, since the guide bar 20f is installed while being moved in the direction of 1 / 2θ, it does not fall down. In this state, the spring 11 is in contact with the guide rod 20f on the flange 20e side, but is separated on the flange 20d side. When rotated in the Z1 direction, the angle θ decreases, but the direction in which the spring 11 falls is 1 / 2θ as in the initial stage. Therefore, the fall of the spring 11 is corrected at all the rotational positions. As the angle θ decreases, the inner diameter φS of the spring 11 decreases. However, by making the diameter φt of the guide rod 20f smaller than the minimum inner diameter φS ′, no adverse effect of the tightening occurs.
【００２１】また、回転移動後、初期状態に戻る方向Ｚ
２に移動する場合も同様に倒れは起らずスムーズに回転
する。Also, the direction Z after the rotational movement returns to the initial state.
Similarly, when moving to No. 2, it does not fall and rotates smoothly.
【００２２】（実施例２）図２に本発明の第２実施例を
示す。バネ１１は図６に示すように倒れるが、これを修
正するには案内棒に接触している部分に肉盛りを施すと
修正される。第１実施例では駆動レバー２０のツバ２０
ｅ側に案内棒を移動させ、すなわち図１の向って右側に
移動させたが、図２のように反対側であるツバ２０ｄ側
に移動させて同様の効果が得られる。図２に於いて２０
ｈはツバ２０ｄ側に移動させた案内棒である。他は図１
と同じ符号を付けてあるので詳細説明は省略する。(Embodiment 2) FIG. 2 shows a second embodiment of the present invention. The spring 11 falls down as shown in FIG. 6, but this can be corrected by building up the portion in contact with the guide rod. In the first embodiment, the collar 20 of the drive lever 20
Although the guide rod is moved to the e side, that is, moved to the right side in FIG. 1, the same effect can be obtained by moving the guide rod to the opposite side of the brim 20d as shown in FIG. 2 in FIG.
h is a guide rod moved to the brim 20d side. Others are in Figure 1
Since the same reference numerals are used, detailed description is omitted.
【００２３】（実施例３）図３に本発明の第３実施例を
示す。図３に示すように案内棒２０ｂは従来同様、その
中心が駆動軸９ａの回転中心と同じであるが、突起２０
ｉにより案内棒２０ｂの中心を移動させたのと同じ効果
を得ることができる。この突起２０ｉは１８０°反対側
に設置しても同様である。(Embodiment 3) FIG. 3 shows a third embodiment of the present invention. As shown in FIG. 3, the center of the guide rod 20b is the same as the rotation center of the drive shaft 9a as in the related art.
The same effect as moving the center of the guide rod 20b by i can be obtained. The same applies to the case where the projection 20i is installed on the opposite side by 180 °.
【００２４】但し、寸法ｕをバネ１１の内径φＳが巻き
締り最小になった時よりも小さくしなければならない。However, the dimension u must be smaller than when the inner diameter φS of the spring 11 is minimized.
【００２５】[0025]
【発明の効果】以上説明したように、請求項１に記載し
た発明によれば、絞り羽根と、駆動源と、前記駆動源の
駆動力を前記絞り羽根に伝達する駆動レバ−と、前記駆
動レバ−に付勢力を与えるとバネとを有する絞り装置に
おいて、前記駆動レバ−に前記バネの内径より小さい径
のバネ案内軸を形成し、前記バネ案内軸の中心位置を前
記駆動レバ−の回動中心位置と異なる位置に設定するこ
とにより、従来例の問題点であるバネの倒れが起こらな
いようにしているので、バネの倒れ量が巻き締り量に応
じて変化することもない。したがって、バネ定数が変化
することなく、駆動特性の優れた高精度な絞り装置を実
現できる。また、請求項４に記載した発明によれば、絞
り羽根と、駆動源と、前記駆動源の駆動力を前記絞り羽
根に伝達する駆動レバ−と、前記駆動レバ−に付勢力を
与えるとバネとを有する絞り装置において、前記駆動レ
バ−に前記バネの内径より小さい径のバネ案内軸を形成
し、前記バネ案内軸の外周に突起を設けて前記バネ案内
軸に対する前記バネの位置を偏らせることにより、従来
例の問題点であるバネの倒れが起こらないようにしてい
るので、バネの倒れ量が巻き締り量に応じて変化するこ
ともない。したがって、バネ定数が変化することなく、
駆動特性の優れた高精度な絞り装置を実現できる。As described above, according to the first aspect of the present invention, the diaphragm blade, the driving source, the driving lever for transmitting the driving force of the driving source to the diaphragm blade, and the driving device In a diaphragm device having a spring when a biasing force is applied to the lever, a spring guide shaft having a diameter smaller than the inner diameter of the spring is formed on the drive lever, and the center position of the spring guide shaft is adjusted by turning the drive lever. By setting the position different from the moving center position, the spring falls, which is a problem of the conventional example, is prevented from occurring, so that the fall amount of the spring does not change according to the tightening amount. Therefore, it is possible to realize a high-precision diaphragm device having excellent driving characteristics without changing the spring constant. According to the invention described in claim 4, the diaphragm blade, the driving source, the driving lever for transmitting the driving force of the driving source to the diaphragm blade, and the spring when the urging force is applied to the driving lever. A spring guide shaft having a diameter smaller than the inner diameter of the spring is formed on the drive lever, and a projection is provided on the outer periphery of the spring guide shaft to bias the position of the spring with respect to the spring guide shaft. This prevents the spring from falling, which is a problem of the conventional example, so that the spring falling amount does not change in accordance with the tightening amount. Therefore, without changing the spring constant,
A high-precision diaphragm device with excellent driving characteristics can be realized.
【００２６】[0026]
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明の第１実施例の駆動レバーの要部拡大平
面図。FIG. 1 is an enlarged plan view of a main part of a drive lever according to a first embodiment of the present invention.
【図２】本発明の第２実施例の平面図。FIG. 2 is a plan view of a second embodiment of the present invention.
【図３】本発明の第３実施例の平面図。FIG. 3 is a plan view of a third embodiment of the present invention.
【図４】従来例の駆動レバーの平面図。FIG. 4 is a plan view of a conventional drive lever.
【図５】図４のＡ−Ａ′断面図。FIG. 5 is a sectional view taken along line AA ′ of FIG. 4;
【図６】図４において耐久後の摩耗状態を示すＡ−Ａ′
断面図。FIG. 6 is a sectional view taken along line AA ′ of FIG.
Sectional view.
【図７】従来の駆動レバーを有した絞り装置の分解斜視
図。FIG. 7 is an exploded perspective view of a conventional aperture device having a drive lever.
９ａ…駆動軸（マグネットロータ９の軸） １０ａ…バネ係止部材 １１ａ，１１ｂ…バネ
１１の係止端 ２０ｂ，２０ｆ，２０ｈ…案内棒２０ｃ…バネ係止部 ２０ｄ，２０ｅ…バネ押えツバ ２０ｇ…案内棒中心 ２０ｉ…突起 １…ホール素子 ２…配線基板 ３…基板 ４…外部電気信号接点 ５…軸受キャップ ６…ヨーク ７，８…コイル ９…マグネットロータ １０…地板 １１…バネ １２，１３…絞り羽根 １４…ＮＤフィルター １５…カバー ２０…駆動レバー9a: Drive shaft (axis of magnet rotor 9) 10a: Spring locking member 11a, 11b: Locking end of spring 11 20b, 20f, 20h: Guide rod 20c: Spring locking portion 20d, 20e: Spring holding collar 20g Guide rod center 20i Projection 1 Hall element 2 Wiring board 3 Substrate 4 External electrical signal contact 5 Bearing cap 6 Yoke 7, 8 Coil 9 Magnet rotor 10 Ground plate 11 Spring 12, 13 Blade 14 ... ND filter 15 ... Cover 20 ... Drive lever
Claims (4)
動力を前記絞り羽根に伝達する駆動レバーと、前記駆動
レバーに付勢力を与えるバネとを有する絞り装置におい
て、前記 駆動レバーには、前記バネの内径より小さい径のバ
ネ案内軸が形成され、前記バネ案内軸の中心位置が前記
駆動レバーの回動中心位置とは異なる位置に設定されて
いることを特徴とする絞り装置。An aperture blade, a drive source, and a drive source for the drive source.
A drive lever for transmitting power to the diaphragm blade;
Diaphragm device odor <br/> and a spring providing a biasing force to the lever Te, wherein the drive lever, a small diameter of the bar than the inner diameter of the spring
A guide shaft is formed, and the center position of the spring guide shaft is
Throttle apparatus characterized by being set to a position that is different from the rotation center position of the driving lever.
する一対のツバが互いに対称となる位置に設けられ、前
記バネ案内軸の中心は、前記一対のツバの中心を結ぶ線
上であって、前記駆動レバーの回動中心からずれた位置
に設定されていることを特徴とする請求項１に記載の絞
り装置。2. The outer periphery of the spring guide shaft projects outward.
A pair of flange that is provided symmetrically a position to each other, before
Center of the serial spring guide shaft is a line connecting the centers of the pair of flange, the diaphragm according to claim 1, characterized in that it is set to a position shifted from the center of rotation of the driving lever device .
する大きさの異なる一対のツバが互いに対称となる位置
に設けられ、前記バネ案内軸の中心は、前記一対のツバ
の中心を結ぶ線上であって、前記駆動レバーの回動中心
から前記一対のツバのうち大きいツバの方にずれた位置
に設定されていることを特徴とする請求項１に記載の絞
り装置。3. An outer periphery of the spring guide shaft projects outward.
Position where a pair of collars of different sizes are symmetrical to each other
Provided, the center of the spring guide shaft is a line connecting the centers of the pair of flange, the center of rotation of the drive lever
2. The aperture device according to claim 1 , wherein the aperture is set at a position shifted from a larger collar to a larger collar of the pair of collars .
動力を前記絞り羽根に伝達する駆動レバーと、前記駆動
レバーに付勢力を与えるバネとを有する絞り装置におい
て、前記駆動レバーには、前記バネの内径より小さい径のバ
ネ案内軸が形成され、前記バネ案内軸の外周に突起を設
け、前記バネ案内軸に対する前記バネの位置を偏らせ る
ことを特徴とする絞り装置。4. An aperture blade, a drive source, and a drive of the drive source.
A drive lever for transmitting power to the diaphragm blade;
A diaphragm having a spring having an inner diameter smaller than the inner diameter of the spring.
A guide shaft is formed, and a projection is provided on the outer periphery of the spring guide shaft.
Only, the iris, characterized in Rukoto biased position of the spring relative to the spring guide shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33584192A JP2776714B2 (en) | 1992-12-16 | 1992-12-16 | Aperture device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33584192A JP2776714B2 (en) | 1992-12-16 | 1992-12-16 | Aperture device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06186611A JPH06186611A (en) | 1994-07-08 |
| JP2776714B2 true JP2776714B2 (en) | 1998-07-16 |
Family
ID=18293000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33584192A Expired - Lifetime JP2776714B2 (en) | 1992-12-16 | 1992-12-16 | Aperture device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2776714B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5144359B2 (en) | 2008-04-25 | 2013-02-13 | セイコープレシジョン株式会社 | Blade driving device and optical apparatus |
-
1992
- 1992-12-16 JP JP33584192A patent/JP2776714B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06186611A (en) | 1994-07-08 |
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