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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