JP2006267227A - Device for adjusting light quantity and optical apparatus having the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for adjusting light quantity that is free from a variation in a quantity of light when adjusting the quantity of light in order to relieve rebound motion resulting from restricting vane members by the use of stoppers, and is capable of correctly regulating the quantity of light in the fully opened position and fully closed position of the vane members. <P>SOLUTION: The light quantity adjusting device: includes the pair of vane members supported on a substrate so as to freely move almost in a straight direction, and used to open or close the optical path aperture; a drive means for operating the pair of vane members in directions opposite to each other; and stopper members disposed on the substrate, against which the pair of vane members strike in their fully opened and/or fully closed positions in order to be restricted. The drive means includes: a driving rotation shaft, a transmission arm member supported on the driving rotation shaft, and a pair of transmission pins disposed on the transmission arm member. The pair of vane members have a drive connecting part that connects to the transmission pins, and a part that restricts striking and engages with the stopper members. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、デジタルカメラ、ビデオカメラなどの撮影機器に、また液晶プロジェクタ、ホームシアター等の投影機器に用いられる光量を調節する光量調整装置及びこれを備えた光学機器に関する。   The present invention relates to a light amount adjusting device that adjusts a light amount used for a photographing device such as a digital camera and a video camera, and a projection device such as a liquid crystal projector and a home theater, and an optical device including the same.

一般にこの種の光量調整装置はカメラ、プロジェクタなどの光路に一枚若しくは複数枚の羽根部材を配置し、この羽根部材をモータなどの駆動装置で開閉することによって光量調節或いは遮閉する装置として広く用いられている。そして、羽根部材は光軸開口を有する基板(地板)に複数枚の羽根をそれぞれ回動自在に軸支して光量を制御する回動羽根構造と、基板の光軸開口に１枚若しくは２枚の羽根を摺動自在に配置する摺動羽根構造が知られている。本発明は基板に形成した光軸開口に２枚の羽根を摺動自在に配置し、この羽根を駆動モータで互いに反対方向に移動させて、光軸開口を通過する光量を調節或いは遮閉する装置に係わる。   In general, this type of light amount adjusting device is widely used as a device for adjusting or blocking light amount by disposing one or a plurality of blade members on the optical path of a camera, projector, etc., and opening and closing the blade members with a driving device such as a motor. It is used. The blade member is a rotating blade structure that controls the amount of light by pivotally supporting a plurality of blades on a substrate (base plate) having an optical axis opening, and one or two blade members on the optical axis opening of the substrate. There is known a sliding blade structure in which the blades are slidably arranged. In the present invention, two blades are slidably disposed in an optical axis opening formed on a substrate, and the blades are moved in opposite directions by a drive motor to adjust or block the amount of light passing through the optical axis opening. Related to the device.

従来このような装置としては例えば特許文献１（実開平６−２３０３７号公報）に開示されている。同文献には中央に光軸開口を有する基板にガイドピンを設け、このガイドピンに左右一対の羽根部材に形成したスリットを嵌合して、摺動自在に支持している。そして基板に取り付けた電磁モータの回動軸にアーム部材を設け、このアーム部材に形成した左右一対の伝動ピンに羽根部材をピンスリット結合することによって左右一対の羽根部材が反対方向に摺動するように構成している。また左右一対の羽根部材には絞り口径を形成する開口縁が形成してあり、この開口縁は光軸を中心として接近或いは離間して光軸の周囲に大小の絞り口径を形成し、また２枚の羽根を完全に閉じ合わせて光軸開口を遮閉している。   Conventionally, such an apparatus is disclosed in, for example, Japanese Patent Application Laid-Open No. 6-23037. In this document, a guide pin is provided on a substrate having an optical axis opening in the center, and a slit formed in a pair of left and right blade members is fitted to the guide pin and supported slidably. Then, an arm member is provided on the rotating shaft of the electromagnetic motor attached to the substrate, and the pair of left and right blade members slide in opposite directions by pin slit coupling the pair of left and right transmission pins formed on the arm member. It is configured as follows. The pair of left and right blade members has an opening edge that forms an aperture diameter. The opening edge approaches or separates around the optical axis to form a large and small aperture diameter around the optical axis. The blades are completely closed to block the optical axis opening.

従って、左右一対の羽根部材或いは光軸開口を遮閉したシャッタ位置若しくは最小絞り位置にストッパピンが設けられ、羽根部材の所定以上運動するのを防止している。このような装置にあって羽根部材をストッパピンで係止する際に生ずる衝撃で羽根部材が前後に振動する所謂チャタリング現象は良く知られ、従来シャッタ動作の際には２枚の羽根重なり部分を大きくして羽根の振動で規制光量に変化を生じないように配慮している。一方、カメラ装置の小型化、特に携帯端末に組込まれる光量調整装置にあっては小型化と駆動モータの消費電力が問題となり、光量調整用の羽根部材も小型でかつ駆動トルクの小さいものが要求されている。
実開平６−２３０３７号公報 Therefore, a stopper pin is provided at the shutter position or the minimum aperture position where the pair of left and right blade members or the optical axis opening is closed to prevent the blade member from moving more than a predetermined amount. In such a device, the so-called chattering phenomenon in which the blade member vibrates back and forth due to the impact generated when the blade member is locked by the stopper pin is well known. Consideration is given so that the amount of regulated light does not change due to vibration of the blades. On the other hand, downsizing of the camera device, especially in the light amount adjusting device incorporated in the portable terminal, is problematic in terms of downsizing and power consumption of the drive motor, and the blade member for adjusting the light amount is also required to be small and have low driving torque. Has been.
Japanese Utility Model Publication No. 6-23037

上述のように光軸開口に臨ませた一対の羽根部材で絞り動作或いはシャッタ動作を行う際に羽根部材をストッパピンで運動規制すると羽根部材がリバウンドして光量ムラが生ずるチャタリング現象が問題となる。このたる従来は羽根のリバウンドを抑えるように駆動部と羽根部材との間のガタつきが生じないように配慮し、或いは開閉速度を緩やかにするように配慮している。これと同時にチャタリング現象が生ずることを予定して羽根相互の重なり量を大きくするため羽根を大きくして開閉ストロークを大きくしている。従って羽根部材の形状は大型化し、その運動領域も大きくなり、同時に駆動モータも大きなトルクで大型化し、消費電力も大きくなる問題がある。   As described above, when performing a diaphragm operation or a shutter operation with a pair of blade members facing the optical axis opening, if the movement of the blade member is restricted by the stopper pin, a chattering phenomenon in which the blade member rebounds and unevenness in the amount of light occurs is a problem. . Conventionally, in order to suppress the rebound of the blades, consideration is given to avoid rattling between the drive unit and the blade member, or consideration is given to slowing the opening and closing speed. At the same time, the chattering phenomenon is expected to occur, and in order to increase the amount of overlap between the blades, the blades are enlarged to increase the opening / closing stroke. Therefore, there is a problem that the shape of the blade member is increased, the movement area is increased, the drive motor is also increased in size with a large torque, and the power consumption is increased.

そこで本発明はストッパーで羽根部材を規制する際のリバウンド運動を緩和するとの着想に基づき光量調節する際の光量ムラを生ずることがなく、特に羽根部材の全開位置及び全閉位置で正確な光量規制が可能な光量調整装置の提供をその主な課題としている。同様に本発明は羽根部材の開閉ストロークを必要以上に大きくすることも、また羽根部材の全閉時の重なり量（オーバーラップ量）を大きくすることも必要とせず、小型で限られたスペース内に容易に組込むことの可能な光量調整装置の提供をその課題としている。   Therefore, the present invention does not cause unevenness in the amount of light when adjusting the amount of light based on the idea of relaxing the rebound movement when the blade member is regulated by the stopper, and accurate light amount regulation particularly at the fully open position and the fully closed position of the blade member. The main problem is to provide a light amount adjustment device capable of achieving the above. Similarly, the present invention does not require an increase in the opening / closing stroke of the blade member more than necessary, nor does it require an increase in the overlap amount (overlap amount) when the blade member is fully closed. It is an object of the present invention to provide a light amount adjustment device that can be easily incorporated into the apparatus.

本発明は上記課題を解決する為に以下の構成を採用したものである。まず本発明に係る第１の発明は、光路開口を有する基板と、上記基板に略々直線方向に移動自在に支持され上記光路開口を開閉する一対の羽根部材と、上記一対の羽根部材を互いに逆方向に作動する駆動手段と、上記基板に設けられ上記一対の羽根部材の全開及び／又は全閉位置でそれぞれの羽根部材を突当て規制するストッパー部材とを備えた光量調整装置において、上記駆動手段は、駆動回転軸と、この駆動回転軸に支持した伝動アーム部材と、この伝動アーム部材に設けた一対の伝動ピンとで構成する。そして上記一対の羽根部材にはそれぞれ上記伝動ピンと結合する駆動連結部と、上記ストッパー部材と係合する突当て規制部とを設ける。同時にこの一対の羽根部材の少なくとも一方に、上記駆動連結部と上記突当て規制部との間に弾性変形可能な緩衝部設ける。   The present invention employs the following configuration in order to solve the above problems. First, according to a first aspect of the present invention, there is provided a substrate having an optical path opening, a pair of blade members supported by the substrate so as to be movable in a substantially linear direction, and opening and closing the optical path opening, and the pair of blade members. In the light amount adjusting device, comprising: a driving means that operates in a reverse direction; and a stopper member that is provided on the substrate and that restricts the blade members to abut against each other at the fully open and / or fully closed positions of the pair of blade members. The means includes a drive rotation shaft, a transmission arm member supported on the drive rotation shaft, and a pair of transmission pins provided on the transmission arm member. Each of the pair of blade members is provided with a drive connecting portion that is coupled to the transmission pin and an abutting restricting portion that is engaged with the stopper member. At the same time, at least one of the pair of blade members is provided with a buffer portion that can be elastically deformed between the drive connecting portion and the abutting restricting portion.

そしてこの緩衝部を上記突当て規制部が上記ストッパー部材に当接する際に弾性変形して突当て規制部をストッパー部材側に付勢する凹溝で構成する。これによって羽根部材にストッパー部材からリバウンド力が作用する際に緩衝部の弾性変形で羽根の突当て規制部はストッパー部材側に付勢されリバウンドを防止することとなり前述の課題を達成することが出来る。   And this buffer part is comprised by the concave groove which is elastically deformed when the said contact control part contact | abuts to the said stopper member, and urges | biases a contact control part to the stopper member side. As a result, when a rebound force is applied to the blade member from the stopper member, the abutting restricting portion of the blade is urged toward the stopper member due to elastic deformation of the buffer portion, thereby preventing the rebound and the above-mentioned problem can be achieved. .

また一対の羽根部材は、それぞれ前記基板に設けたガイドピンと係合するスリット溝を設け、このスリット溝に沿って略直線上に摺動自在に支持する。そしてこのガイドピンで前記ストッパー部材を構成してスリット溝の端面で前根部材の突当て規制部を構成する。そこで前記緩衝部を上記ストッパー部材を構成するガイドピンと前記駆動連結部との間に配置することによって羽根の開閉と全開及び全閉時の運動規制をガイドピンで行うことが出来、構造を簡素化することが可能となる。更に、前記羽根部材は、基端部に前記駆動連結部を、先端部に前記光路開口を覆う絞り開口部を形成し、この駆動連結部と絞り開口部との間に前記突当て規制部と前記緩衝部を配置する。   Each of the pair of blade members is provided with a slit groove that engages with a guide pin provided on the substrate, and is supported slidably on a substantially straight line along the slit groove. The guide pin constitutes the stopper member, and the end face of the slit groove constitutes the abutment restricting portion of the front root member. Therefore, by disposing the buffer part between the guide pin constituting the stopper member and the drive connecting part, the opening and closing of the blades and the movement restriction when fully open and fully closed can be performed with the guide pin, and the structure is simplified. It becomes possible to do. Further, the blade member is formed with a drive connection portion at a base end portion and an aperture opening portion covering the optical path opening at a distal end portion, and the abutting restricting portion between the drive connection portion and the aperture opening portion. The buffer portion is disposed.

従って緩衝部の弾性変形によって羽根先端部の絞り開口部が変形することがない。そして、前記緩衝部を構成する凹溝を前記羽根部材の側縁に形成した切欠溝で構成し、この切欠溝は前記突当て規制部が前記ストッパー部材に規制された状態で前記伝動ピンの作用で羽根部材を弾性変形する長さ形状に構成する。この場合、この切欠き溝は前記突当て規制部が前記ストッパー部材に当接する位置でこの突当て規制部と前記ストッパー部材との係合点と、前記連結部と前記伝動ピンとの係合点とを結ぶ直線を過ぎる長さに形成する。これによってより大きな弾性変形と付勢力を得ることが出来る。   Therefore, the diaphragm opening at the blade tip is not deformed by the elastic deformation of the buffer. And the concave groove which comprises the said buffer part is comprised by the notch groove formed in the side edge of the said blade member, and this notch groove is the effect | action of the said transmission pin in the state in which the said contact control part was controlled by the said stopper member The blade member is configured to have a length shape that elastically deforms. In this case, the notch groove connects an engagement point between the abutment restricting portion and the stopper member at a position where the abutment restricting portion abuts on the stopper member, and an engagement point between the connecting portion and the transmission pin. Form a length that passes a straight line. Thereby, larger elastic deformation and urging force can be obtained.

また本発明に係る第２の発明は、光路開口とこの光路開口に配置され光を集光若しくは投光する光学レンズと、この光学レンズの結像を撮像する撮像手段又は上記光学レンズに投影する光学手段と、上記光学レンズを通過する光の光量を調整する光量調整装置とを備えた光学機器に於いて、前記光量調整装置は、光路開口を有する基板と、上記基板に略々直線方向に移動自在に支持され上記光路開口を開閉する一対の羽根部材と、上記一対の羽根部材を互いに逆方向に作動する駆動手段と、上記基板に設けられ上記一対の羽根部材の全開及び／又は全閉位置でそれぞれの羽根部材を突当て規制するストッパー部材とを備え、上記駆動手段は、駆動回転軸と、この駆動回転軸に支持した伝動アーム部材と、この伝動アーム部材に設けた一対の伝動ピンとで構成し、上記一対の羽根部材は、それぞれ上記伝動ピンと結合する駆動連結部と、上記ストッパー部材と係合する突当て規制部とを有し、上記一対の羽根部材の少なくとも一方は上記駆動連結部と上記突当て規制部との間に弾性変形可能な緩衝部を備え、この緩衝部は上記突当て規制部が上記ストッパー部材に当接する際に弾性変形して該突当て規制部をストッパー部材側に付勢する凹溝で構成する。   Further, a second invention according to the present invention projects an optical path opening, an optical lens arranged in the optical path opening for condensing or projecting light, an imaging means for imaging an image of the optical lens, or the optical lens. In an optical apparatus including an optical unit and a light amount adjusting device that adjusts a light amount of light passing through the optical lens, the light amount adjusting device includes a substrate having an optical path opening and a substantially linear direction on the substrate. A pair of blade members that are movably supported to open and close the optical path opening, a driving means that operates the pair of blade members in opposite directions, and a fully open and / or fully closed pair of blade members provided on the substrate. And a stopper member for restricting the blade members against each other at a position. The drive means includes a drive rotation shaft, a transmission arm member supported on the drive rotation shaft, and a pair of transmission members provided on the transmission arm member. Each of the pair of blade members includes a drive connecting portion coupled to the transmission pin, and an abutting restricting portion engaged with the stopper member, and at least one of the pair of blade members is the drive A buffer portion that can be elastically deformed is provided between the connecting portion and the bump restricting portion, and the buffer portion is elastically deformed when the bump restricting portion comes into contact with the stopper member, and the bump restricting portion is stopped by the stopper. It is composed of a concave groove that is biased toward the member side.

本発明は、光路開口を有する基板に一対の羽根部材を直線方向に移動自在に取り付け、この羽根部材の少なくとも１つに全開及び／又は全閉位置でストッパー部材と係合する突き当て規制部と駆動連結部との間に凹溝から成る弾性変形可能な緩衝部を設けたものであり、この緩衝部によって羽根部材がストッパー部材に突き当たった際の衝突でリバウンドする力が軽減される。   According to the present invention, a pair of blade members are attached to a substrate having an optical path opening so as to be movable in a linear direction, and at least one of the blade members is engaged with a stopper member in a fully open and / or fully closed position. An elastically deformable buffer portion comprising a concave groove is provided between the drive connecting portion, and the buffer portion reduces the rebound force caused by the collision when the blade member hits the stopper member.

つまりストッパーに突き当たった際に、羽根部材には衝突による反力と同時に駆動モータなどの駆動手段の慣性力を受けて緩衝部の弾性変形による弾性力が作用し、この反力に対し弾性力は逆方向に作用するため羽根のリバウンドを軽減することが出来る。従って、羽根部材はストッパー部材に突き当たった際にリバウンドが緩和され、その結果一対の羽根部材は閉鎖状態（全閉位置）で互いに重なり合うオーバーラップ量を小さくすることができ、同様に羽根の全開状態では開閉動作領域を光路開口縁に近づけることが可能であり限られた空間スペース内に羽根部材を配置することが出来る。また、その為の構成も羽根部材に凹溝などの緩衝部を形成するのみで良く簡単で安価である等の効果を奏する。   In other words, when it hits the stopper, the blade member receives the inertial force of the driving means such as the drive motor simultaneously with the reaction force due to the collision, and the elastic force due to the elastic deformation of the buffer portion acts, and the elastic force is against this reaction force. Since it acts in the opposite direction, the rebound of the blade can be reduced. Therefore, when the blade member hits the stopper member, the rebound is alleviated, and as a result, the pair of blade members can reduce the overlap amount overlapping each other in the closed state (fully closed position). Then, the opening / closing operation region can be brought close to the edge of the optical path opening, and the blade member can be arranged in a limited space. In addition, the configuration for that purpose can be achieved simply by forming a cushioning portion such as a concave groove on the blade member, and effects such as being simple and inexpensive can be obtained.

以下本発明を図示の好適な実施の形態に基づいて詳述する。図１乃至図９は本発明に係る光量調整装置を示し、図１はその外観を示す斜視図、図２はその分解斜視図、図３乃至図９はその要部の説明図である。図示の光量調整装置は、基板１０、第１の羽根部材２０、第２の羽根部材３０、押え板４０、駆動手段支持フレーム５０、駆動手段６０、フレームカバー７０、ヨーク８０で構成され、以下順次これを説明する。   The present invention will be described in detail below based on the preferred embodiments shown in the drawings. 1 to 9 show a light amount adjusting device according to the present invention, FIG. 1 is a perspective view showing an appearance thereof, FIG. 2 is an exploded perspective view thereof, and FIGS. 3 to 9 are explanatory views of main parts thereof. The illustrated light amount adjusting device includes a substrate 10, a first blade member 20, a second blade member 30, a pressing plate 40, a driving means support frame 50, a driving means 60, a frame cover 70, and a yoke 80, and so on. This will be explained.

まず基板１０は、合成樹脂のモールド成形で扁平形状に構成され、その中央に光路開口１１が設けてある。この光路開口１１の周囲には羽根部材を摺動自在に支持するガイドピン１２ａ乃至１２ｄと、羽根部材との摩擦を軽減する突起リブ１３が一体形成してある。後述する第１の羽根部材２０はガイドピン１２ａ、１２ｂ、１２ｃ、に支持され、第２の羽根部材３０はガイドピン１２ａ、１２ｃ、１２ｄに支持され、それぞれ略々直線方向に案内される。また、突起リブ１３は羽根の移動方向に複数条の突起で形成され図示のものは光路開口１１を挟んでその左右両側部に形成してある。尚、この突起リブ１３は羽根部材を直線方向に移動自在に案内するのと同時に後述する羽根部材の緩衝部が容易に弾性変形するように摩擦を軽減している。   First, the substrate 10 is formed into a flat shape by molding with a synthetic resin, and an optical path opening 11 is provided at the center thereof. Around the optical path opening 11, guide pins 12a to 12d that slidably support the blade member and a protruding rib 13 that reduces friction with the blade member are integrally formed. A first blade member 20 described later is supported by guide pins 12a, 12b, and 12c, and a second blade member 30 is supported by guide pins 12a, 12c, and 12d, and is guided in a substantially linear direction. Further, the protruding ribs 13 are formed by a plurality of protrusions in the moving direction of the blades, and the illustrated ribs are formed on both the left and right sides of the optical path opening 11. The projecting rib 13 reduces the friction so that the cushioning portion of the blade member, which will be described later, easily elastically deforms while simultaneously guiding the blade member to move in the linear direction.

更に上記基板１０には、押え板４０を係止する突起爪１４及びこの押え板４０を所定の間隔で離間保持する窪み溝１５、駆動手段支持フレーム５０を図示せぬビスで取り付けるための支持孔１６及び係止爪1７、駆動手段６０の後述する伝動アーム６４の先端部が貫通し揺動自在なスリット孔１８を樹脂成形加工により一体形成している。また基板１０の外形外周に沿って壁部１９がフランジ状に設けられ、羽根部材２０，３０がスライドする許容空間を形成している。この壁部１９にはその上面より若干突出した突起１９ａが設けてある。   Further, the substrate 10 has a projection claw 14 for locking the presser plate 40, a recessed groove 15 for holding the presser plate 40 at a predetermined interval, and a support hole for attaching the driving means support frame 50 with screws (not shown). 16 and a locking claw 17, and a slit hole 18 that can be swung through a distal end portion of a transmission arm 64 (described later) of the driving means 60 is integrally formed by resin molding. A wall portion 19 is provided in a flange shape along the outer periphery of the substrate 10 to form an allowable space in which the blade members 20 and 30 slide. The wall portion 19 is provided with a protrusion 19a slightly protruding from the upper surface thereof.

次に、上記基板１０に取り付けられる一対の羽根部材について説明する。図示の羽根部材は、板厚４０μから５０μの黒色不透明樹脂シートをプレス加工で所定形状に打ち抜き成形で構成される。このように合成樹脂のフィルム材料で羽根部材を形成したのは加工が容易で軽量に構成することが出来、駆動装置を小型化できるためである。これと同時に合成樹脂の羽根部材は弾性変形し易い為であり、後述する緩衝部の弾性変形が得られれば合成樹脂に限らず金属薄板で形成しても良い。そこで第１の羽根部材２０には、図４に示す様に基板１０の光路開口１１に望む絞り部２１が形成してあり、この絞り部２１は第２の羽根部材３０の絞り部３１と共に光路開口１１を開閉する形状に構成する。図示の絞り部２１と３１とは互いに半円形状で反対方向に配置され光路開口１１に大小の口径を形成するようになっている。   Next, a pair of blade members attached to the substrate 10 will be described. The illustrated blade member is formed by punching a black opaque resin sheet having a thickness of 40 to 50 μ into a predetermined shape by pressing. The reason why the blade member is formed of the synthetic resin film material is that it is easy to process and can be made lightweight, and the drive device can be downsized. At the same time, the blade member of the synthetic resin is easily elastically deformed, and may be formed of a metal thin plate as well as the synthetic resin as long as the elastic deformation of the buffer portion described later is obtained. Thus, the first blade member 20 is formed with a desired diaphragm 21 in the optical path opening 11 of the substrate 10 as shown in FIG. 4, and this diaphragm 21 together with the diaphragm 31 of the second blade member 30 has an optical path. The opening 11 is configured to open and close. The illustrated diaphragm portions 21 and 31 are semicircular and are arranged in opposite directions so as to form large and small apertures in the optical path opening 11.

また、第１の羽根部材２０にはスリット孔２２ａ乃至２２ｃが形成してあり、基板１０のガイドピン１２ａ，１２ｂ，１２ｃに嵌合して直線方向にスライド自在に支持される。同様にスリット孔２３が形成され、後述する伝動アーム６４の伝動ピン６４ａが係合される。このように構成された第１の羽根部材２０には伝動ピン６４ａを係合するスリット孔２３とガイドピン１２ｂに嵌合するスリット孔２２ｂとの間に緩衝部２４が形成してある。図示の緩衝部２４は羽根の外縁に切欠き溝を形成した凹溝で形成してある。従って第１の羽根部材２０には伝動ピン６４ａと係合する駆動連結部（スリット孔２３）とスリット孔２２ｂとの間に凹溝からなる緩衝部２４が形成されることとなる。そしてこのスリット孔２２ｂの端縁は後述する羽根の全閉位置での突き当て規制部を構成することとなる。   In addition, slit holes 22a to 22c are formed in the first blade member 20, and are fitted to the guide pins 12a, 12b, and 12c of the substrate 10 so as to be slidable in the linear direction. Similarly, a slit hole 23 is formed, and a transmission pin 64a of a transmission arm 64 described later is engaged. In the first blade member 20 configured in this manner, a buffer portion 24 is formed between the slit hole 23 that engages the transmission pin 64a and the slit hole 22b that fits the guide pin 12b. The illustrated buffer portion 24 is formed as a concave groove having a notch groove formed on the outer edge of the blade. Accordingly, the first blade member 20 is provided with a buffer portion 24 formed of a concave groove between the drive connecting portion (slit hole 23) that engages with the transmission pin 64a and the slit hole 22b. And the edge of this slit hole 22b comprises the butting | limiting control part in the fully closed position of the blade | wing mentioned later.

次に、第２の羽根部材３０は、第１の羽根部材２０と同様に外形形状は異なるものの、板厚４０μから５０μの黒色不透明樹脂シートをプレス加工で外形を抜くと同時に、図５に示す様に基板１０の光路開口１１を第１の羽根部材２０とともに開閉する絞り部３１、基板１０のガイドピン１２ａ，１２ｃ，１２ｄが貫通しそのガイドピン１２ａ，１２ｃ，１２ｄにスライド自在に支持されるスリット孔３２ａ乃至３２ｃ、および駆動手段６０の後述する伝動アーム６４の伝動ピン６４ｂが貫通しスライド駆動するスリット孔３３が形成されている。   Next, although the outer shape of the second blade member 30 is different from that of the first blade member 20, the outer shape is removed by pressing a black opaque resin sheet having a plate thickness of 40 to 50 μm, and simultaneously shown in FIG. Similarly, the diaphragm portion 31 that opens and closes the optical path opening 11 of the substrate 10 together with the first blade member 20, and the guide pins 12a, 12c, and 12d of the substrate 10 pass through and are slidably supported by the guide pins 12a, 12c, and 12d. The slit holes 32a to 32c and a slit hole 33 through which a transmission pin 64b of a transmission arm 64 (to be described later) of the driving means 60 passes and slides are formed.

このように構成された第２の羽根部材３０には伝動ピン６４ｂを係合するスリット孔３３とガイドピン１２ｄに嵌合するスリット孔３２ｃとの間に緩衝部３４が形成してある。図示の緩衝部３４は羽根の外縁に切り欠き溝を形成した凹溝で形成してある。従って第２の羽根部材３０には伝動ピン６４ｂと係合する駆動連結部（スリット孔３３）とスリット孔３２ｃとの間に凹溝からなる緩衝部３４が形成されることとなる。そしてこのスリット孔３２ｃの端縁は後述する羽根の全閉位置での突き当て規制部を構成することとなる。   In the second blade member 30 configured in this manner, a buffer portion 34 is formed between the slit hole 33 that engages the transmission pin 64b and the slit hole 32c that fits the guide pin 12d. The illustrated buffer portion 34 is formed of a concave groove having a notch groove formed on the outer edge of the blade. Accordingly, the second blade member 30 is provided with a buffer portion 34 formed of a concave groove between the drive coupling portion (slit hole 33) that engages with the transmission pin 64b and the slit hole 32c. And the edge of this slit hole 32c comprises the abutting control part in the fully closed position of the blade | wing mentioned later.

次に、図２及び図６に示す押え板４０は、アルミのシート材をプレス加工と曲げ加工により成形されたもので、上述の基板１０をカバーリングした際に、基板１０の光路開口１１とほぼ同径の光路開口４１、基板１０の突起爪１４と係合する係止孔４２、基板１０の窪み溝１５と位置決めされ、基板１０との間に羽根部材２０，３０が移動自在な許容空間スペースを形成する高さ位置決め突起４３、基板１０の壁部１９より突出した突起１９ａにより横方向の位置決めをする水平位置決め突起４４、基板１０のスリット孔１８を貫通し羽根部材２０，３０を駆動する駆動手段６０の後述する伝動アーム６４の揺動を妨げ無いように開口したスリット状の逃げ孔４５、基板１０の支持孔１６が貫通する貫通穴４６、羽根部材２０の許容空間スペースの高さ方向を規制する突出量が高いガイドリブ４７、羽根部材３０の許容空間スペースの高さ方向を規制する突出量がガイドリブ４７より小さい低いガイドリブ４８、基板１０のガイドピン１２ａ乃至１２ｄの逃げ孔４９がそれぞれ形成されている。   2 and 6 are formed by pressing and bending an aluminum sheet material. When the above-described substrate 10 is covered, the holding plate 40 and the optical path opening 11 of the substrate 10 are formed. The optical path opening 41 having substantially the same diameter, the locking hole 42 that engages with the protruding claw 14 of the substrate 10, and the recessed groove 15 of the substrate 10, and the allowable space in which the blade members 20, 30 are movable between the substrate 10. A height positioning projection 43 that forms a space, a horizontal positioning projection 44 that laterally positions by a projection 19 a that protrudes from the wall portion 19 of the substrate 10, and the blade members 20 and 30 are driven through the slit hole 18 of the substrate 10. A slit-shaped escape hole 45 that is opened so as not to hinder the oscillation of a transmission arm 64 (to be described later) of the drive means 60, a through hole 46 through which the support hole 16 of the substrate 10 passes, and an allowable space space of the blade member 20. The guide rib 47 with a high protrusion amount that regulates the height direction of the guide, the guide rib 48 with a low projection amount that restricts the height direction of the allowable space of the blade member 30 is smaller than the guide rib 47, and the relief of the guide pins 12a to 12d of the substrate 10 Each hole 49 is formed.

次に、図２及び図７に示す駆動手段支持フレーム５０は、駆動手段６０を基板１０に取り付ける為のもので、基板１０の係止爪１７に係止される係止孔５１、基板１０の支持孔１６に図示せぬビスによりビス止めされるビス孔５２を形成し基板１０に固定支持される。また、中央部位に駆動手段６０を回転止めする止め溝５３、駆動手段６０の後述する伝動アーム６４が貫通し揺動するスリット状の逃げ孔５４、駆動手段６０を包み込む側壁５５を形成している。   Next, the driving means support frame 50 shown in FIGS. 2 and 7 is for attaching the driving means 60 to the substrate 10. The locking holes 51 that are locked to the locking claws 17 of the substrate 10, A screw hole 52 to be screwed with a screw (not shown) is formed in the support hole 16 and fixedly supported on the substrate 10. Further, a stop groove 53 for stopping the driving means 60 from rotating, a slit-like escape hole 54 through which a transmission arm 64 (described later) of the driving means 60 swings, and a side wall 55 that encloses the driving means 60 are formed in the central portion. .

次に、図２及び図８に示す駆動手段６０及びヨーク８０は、電導コイル６１、この電導コイル６１を巻回するための外周に凹環溝を形成したコイル枠６２、コイル枠６２の内部に回動自在に支持されたＮ、Ｓの２極に着磁されたマグネットロータ６３、マグネットロータ６３に一体形成されコイル枠６２より左右から外部に突出した伝動アーム６４と伝動アーム６４と一体に形成された伝動ピン６４ａ，６４ｂ、駆動手段支持フレーム５０の止め溝５３に回転止めされる突起６５から成る。また同駆動手段６０を外部磁界より遮蔽及びマグネットロータ６３の磁気回路を形成するヨーク８０から成る。   Next, the driving means 60 and the yoke 80 shown in FIG. 2 and FIG. 8 include a conductive coil 61, a coil frame 62 in which a concave ring groove is formed on the outer periphery for winding the conductive coil 61, and the coil frame 62. A magnet rotor 63 magnetized with two poles N and S supported rotatably, a transmission arm 64 integrally formed with the magnet rotor 63 and projecting from the left and right sides from the coil frame 62 and a transmission arm 64 are formed integrally. The transmission pins 64a and 64b, and the projection 65 which is rotationally stopped in the stop groove 53 of the drive means support frame 50. The driving means 60 includes a yoke 80 that shields the external magnetic field and forms a magnetic circuit of the magnet rotor 63.

次に、図２及び図９に示すフレームカバー７０は、駆動手段支持フレーム５０に固定支持された駆動手段６０を支える側壁７１、ヨーク８０の取り付け位置を位置決めする位置決め孔７２を形成するとともに駆動手段支持フレーム５０をカバーリングする。   Next, the frame cover 70 shown in FIGS. 2 and 9 forms a side wall 71 for supporting the driving means 60 fixedly supported by the driving means support frame 50, a positioning hole 72 for positioning the mounting position of the yoke 80, and the driving means. The support frame 50 is covered.

次に、以上説明した各部品の組立工程について図２に基づき説明する。まず、基板１０の突起リブ１３上に羽根部材２０を載置すべく基板１０のガイドピン１２ａ、１２ｂ、１２ｃに羽根部材２０のスリット孔２２ａ、２２ｂ、２２ｃをそれぞれ同時に差し込みセットする。その上から同様に羽根部材３０を載置すべく基板１０のガイドピン１２ａ、１２ｃ、１２ｄに羽根部材３０のスリット孔３２ａ、３２ｂ、３２ｃをそれぞれ同時に差し込みセットする。   Next, the assembly process of each component described above will be described with reference to FIG. First, the slit holes 22a, 22b, and 22c of the blade member 20 are simultaneously inserted and set in the guide pins 12a, 12b, and 12c of the substrate 10 in order to place the blade member 20 on the protruding rib 13 of the substrate 10. Similarly, the slit holes 32a, 32b, 32c of the blade member 30 are simultaneously inserted and set in the guide pins 12a, 12c, 12d of the substrate 10 in order to place the blade member 30 in the same manner.

そして、その上から押え板４０を、更に駆動手段支持フレーム５０を基板１０に取り付ける。その際に図示せぬセット冶工具で基板１０、羽根部材２０，３０及び押え板４０の各部材に設けた組立時の位置決め孔Ｐ１乃至Ｐ４の中心が一致するように位置決めする。この状態で駆動手段６０の伝動アーム６４が羽根部材２０、３０のスリット孔２３、３３に貫通するように嵌め込んだ後、駆動手段６０の突起６５を駆動手段支持フレーム５０の止め溝５３に指し込み若干回転させ固定する。駆動手段６０を駆動手段支持フレーム５０に取り付け後、フレームカバー７０の位置決め孔７２を駆動手段６０に嵌合した状態で、フレームカバー７０の側壁７１とヨーク８０の接触部をボンドで接着することで装置の組立が完成する。   Then, the pressing plate 40 and the driving means support frame 50 are attached to the substrate 10 from above. At that time, positioning is performed so that the centers of the positioning holes P1 to P4 provided in the respective members of the substrate 10, the blade members 20, 30 and the presser plate 40 coincide with each other with a set jig (not shown). In this state, after the transmission arm 64 of the driving means 60 is fitted so as to penetrate the slit holes 23 and 33 of the blade members 20 and 30, the protrusion 65 of the driving means 60 is pointed to the stop groove 53 of the driving means support frame 50. Rotate slightly and fix. After attaching the driving means 60 to the driving means support frame 50, the contact portion between the side wall 71 of the frame cover 70 and the yoke 80 is bonded with a bond while the positioning hole 72 of the frame cover 70 is fitted to the driving means 60. The assembly of the device is completed.

次に、上述の光量調整装置の光量調整動作について説明する。光量調整装置を搭載した光学機器本体からの光量調整信号に応じ図示せぬ光量調整装置を制御する制御回路により駆動手段６０の電導コイル６１に電流が供給される。この供給電流の流れる方向を切り替えることで、その電導コイル６１に磁界が発生し、その磁界により駆動手段６０のマグネットロータ６２をその供給電流の流れる方向に応じた方向に回転トルクが生じ回転する。この回転により駆動手段６０の伝動アーム６４が揺動し羽根部材２０、３０を互いに逆方向に移動し基板１０の光路開口１１を開閉駆動し光量を調整する。   Next, the light amount adjustment operation of the above light amount adjustment apparatus will be described. A current is supplied to the conductive coil 61 of the driving means 60 by a control circuit that controls the light amount adjusting device (not shown) in response to a light amount adjusting signal from the optical device main body equipped with the light amount adjusting device. By switching the direction in which the supply current flows, a magnetic field is generated in the conducting coil 61, and the magnetic rotor 62 of the driving unit 60 generates a rotational torque in a direction corresponding to the direction in which the supply current flows. By this rotation, the transmission arm 64 of the driving means 60 is swung to move the blade members 20 and 30 in opposite directions to drive the opening and closing of the optical path opening 11 of the substrate 10 to adjust the light quantity.

本発明は上述の動作の過程で緩衝部２４の作用によって羽根部材のリバウンドを防止したものであり、これを図１０乃至１３に基づき説明する。図１０は第１の羽根部材２０の全開位置での羽根の挙動を、図１１は全閉位置での羽根の挙動をそれぞれ示している。図示の第１の羽根部材２０は基板１０に設けたガイドピン１２ｂがストッパー部材を兼ね、このガイドピン１２ｂに係合したスリット孔２２ｂの図示左端縁が全開時の突き当て規制部（当接面）を構成している。尚、図示のスリット孔２２ａは右端縁が全閉時の突き当て規制部となる。   In the present invention, the rebound of the blade member is prevented by the action of the buffer portion 24 in the process of the above-described operation, and this will be described with reference to FIGS. FIG. 10 shows the behavior of the blades in the fully opened position of the first blade member 20, and FIG. 11 shows the behavior of the blades in the fully closed position. In the illustrated first blade member 20, the guide pin 12 b provided on the substrate 10 also serves as a stopper member, and the illustrated left end edge of the slit hole 22 b engaged with the guide pin 12 b is the abutting restricting portion (contact surface) when fully opened. ). The slit hole 22a shown in the drawing serves as an abutment restricting portion when the right edge is fully closed.

そこで図１０（ａ）は、第１の羽根部材２０が同図右方向に移動し開放位置にある状態を示し、図中、ガイドピン１２ｂがスリット孔２２ｂの左端縁と当接状態となっている。このガイドピン１２ｂの規制により絞り部２１が基板１０の露光開口１１に対し所定量退避した全開位置で位置規制される。この規制位置は基板１０の露光開口１１、ガイドピン１２ｂと羽根部材２０のスリット孔２２ｂの各部品精度を管理することによって正確に維持されている。また同図（ｂ）は羽根部材が開放位置に至った直後の状態を示す。   FIG. 10A shows a state in which the first blade member 20 moves to the right in the drawing and is in the open position. In the drawing, the guide pin 12b is in contact with the left edge of the slit hole 22b. Yes. The restriction of the guide pin 12b restricts the position of the diaphragm 21 at the fully open position with a predetermined amount retracted from the exposure opening 11 of the substrate 10. This restricting position is accurately maintained by managing the accuracy of each component of the exposure opening 11 of the substrate 10, the guide pin 12b, and the slit hole 22b of the blade member 20. FIG. 2B shows a state immediately after the blade member reaches the open position.

ストッパー部材を兼ねるガイドピン１２ｂの中心と、スリット孔２３が伝動ピン６４ａに当接する接点とを結ぶ直線上の中間位置に緩衝部２４が形成されている。この緩衝部２４は羽根部材の側縁から切り欠かれた凹溝で構成されている。また、この凹溝はストッパー部材（ガイドピン１２ｂ）にスリット孔２２ｂの端縁が規制された直後に駆動手段の慣性によって羽根部材の駆動連結部（スリット孔２３）にストッパー部材の中点を結ぶ直線方向に力が作用し、緩衝部２４が図示のように弾性変形する。従って凹溝の形状はこの弾性変形によって十分な弾性力が羽根部材の突き当て規制部に及ぶように設定する。そしてこの弾性変形により羽根部材２０のリバウンドが吸収され、絞り部２１の全開位置からのリバウンドを軽減することが出来る。   A buffer portion 24 is formed at an intermediate position on a straight line connecting the center of the guide pin 12b serving also as a stopper member and the contact point where the slit hole 23 abuts on the transmission pin 64a. This buffer part 24 is comprised by the ditch | groove notched from the side edge of the blade member. Further, this concave groove connects the middle point of the stopper member to the drive connecting portion (slit hole 23) of the blade member by the inertia of the driving means immediately after the edge of the slit hole 22b is regulated by the stopper member (guide pin 12b). A force acts in the linear direction, and the buffer portion 24 is elastically deformed as shown. Therefore, the shape of the concave groove is set so that a sufficient elastic force reaches the abutting restricting portion of the blade member by this elastic deformation. And the rebound of the blade member 20 is absorbed by this elastic deformation, and the rebound from the fully open position of the aperture | diaphragm | squeeze part 21 can be reduced.

この結果、緩衝部２４を備えない場合と比較して絞り部２１の露光開口１１からの退避距離Ｌ１位置を設計上小さく設定することが出来、装置のコンパクト化を図ることが出来る。尚、ガイドピン１２ｂが羽根部材２０のストッパー部材を兼ねているが、他のガイドピン１２ａ、１２ｃのいずれか１つに設定しても、また３つのガイドピン１２ａ、１２ｂ、１２ｃが同時にストッパー部材として作用しても、或いは新たに基板１０にピンを植設してストッパー部材としても良い。   As a result, compared with the case where the buffer part 24 is not provided, the retracted distance L1 position of the diaphragm part 21 from the exposure opening 11 can be set small in design, and the apparatus can be made compact. The guide pin 12b also serves as a stopper member for the blade member 20. However, even if one of the other guide pins 12a and 12c is set, the three guide pins 12a, 12b, and 12c are simultaneously stopper members. Alternatively, a stopper may be used by newly implanting a pin on the substrate 10.

図１１は、第１の羽根部材２０の全閉時の羽根の挙動を示し、同図（ａ）は羽根部材２０が同図左方向に移動しガイドピン１２ｂがスリット孔２２ｂの右端縁と当接した状態を示し、同図（ｂ）は、駆動手段が慣性によって羽根部材の緩衝部２４を弾性変形させた状態を示す。同図（ａ）の状態で第１の羽根部材２０は、ガイドピン１２ｂの規制により絞り部２１が基板１０の露光開口１１の中心に対し所定量行き過ぎた進入位置で位置規制される。この進入した規制位置は基板１０の露光開口１１、ガイドピン１２ｂと羽根部材２０のスリット孔２２ｂの適正な部品精度により設定される。   FIG. 11 shows the behavior of the blade when the first blade member 20 is fully closed. FIG. 11A shows the blade member 20 moving to the left in the drawing, and the guide pin 12b is in contact with the right edge of the slit hole 22b. FIG. 4B shows a state in which the driving means elastically deforms the buffer portion 24 of the blade member due to inertia. In the state shown in FIG. 5A, the position of the first blade member 20 is restricted at an entry position where the diaphragm 21 has exceeded a predetermined amount with respect to the center of the exposure opening 11 of the substrate 10 by the restriction of the guide pin 12b. The entered restricting position is set by appropriate component accuracy of the exposure opening 11 of the substrate 10, the guide pin 12 b and the slit hole 22 b of the blade member 20.

また同図（ｂ）は閉鎖位置に成った直後の状態を示すもので、ストッパー部材を兼ねるガイドピン１２ｂの中心とスリット孔２３の駆動手段６０の伝動ピン６４ａが押圧し作用力を付与する接点とを結ぶ直線上の中間部位に羽根部材の側端部から切り欠かれた凹溝で構成された緩衝部２４が形成されている。また、この凹溝の溝はストッパー部材であるガイドピン１２ｂにスリット孔２２ｂの端部が規制された直後に前記駆動手段と駆動連結する前記連結部の接点に加えられ前記ストッパー部材の中点を結ぶ直線方向に作用する駆動手段６０の作用力により緩衝部２４が図のように弾性変形し得る深さに形成している。この弾性変形により第１の羽根部材２０のリバウンドが吸収され、絞り部２１の退避位置からのリバウンドを軽減することが出来る。この結果、緩衝部２４を有さない場合と比較して絞り部２１の露光開口１１からの進入距離Ｌ３を設計上小さく設定することが出来、装置のコンパクト化を図ることが出来る。   FIG. 2B shows a state immediately after the closed position is reached, and the center of the guide pin 12b which also serves as a stopper member and the contact point where the transmission pin 64a of the driving means 60 of the slit hole 23 is pressed to give an acting force. A buffer portion 24 composed of a concave groove cut out from a side end portion of the blade member is formed at an intermediate portion on a straight line connecting the two. Further, the groove of the concave groove is added to the contact point of the connecting portion that is connected to the driving means immediately after the end portion of the slit hole 22b is regulated by the guide pin 12b that is a stopper member, and the middle point of the stopper member is set. The buffer portion 24 is formed to a depth at which it can be elastically deformed as shown in the figure by the acting force of the driving means 60 acting in the connecting linear direction. By this elastic deformation, the rebound of the first blade member 20 is absorbed, and the rebound from the retracted position of the throttle portion 21 can be reduced. As a result, compared with the case where the buffer part 24 is not provided, the approach distance L3 from the exposure opening 11 of the diaphragm part 21 can be set small in design, and the apparatus can be made compact.

次に、図１２は第２の羽根部材３０の全開位置での羽根の挙動を、図１３は全閉位置での羽根の挙動をそれぞれ示している。図示の第２の羽根部材３０は基板１０に設けたガイドピン１２ｄがストッパー部材を兼ね、このガイドピン１２ｄに係合したスリット孔３２ｃの図示左端縁が全開時の突き当て規制部（当接面）を構成している。尚、このスリット孔３２ｃは右端縁が全閉時の突き当て規制部となる。   Next, FIG. 12 shows the behavior of the blades in the fully opened position of the second blade member 30, and FIG. 13 shows the behavior of the blades in the fully closed position. In the illustrated second blade member 30, the guide pin 12 d provided on the substrate 10 also serves as a stopper member, and the left end edge of the slit hole 32 c engaged with the guide pin 12 d is an abutment restricting portion (contact surface) when fully opened. ). The slit hole 32c serves as an abutment restricting portion when the right end edge is fully closed.

図１２（ａ）は第２の羽根部材３０が同図左方向に移動し開放位置にある状態を示すもので、図中、基板１０のガイドピン１２ｄが第２の羽根部材３０のストッパー部材を兼ね、このガイドピン１２ｄがスリット孔３２ｃの同図右端と当接状態となっている。このガイドピン１２ｄの規制により絞り部３１が基板１０の露光開口１１に対し所定量退避した位置で位置規制される。この退避した全開位置は基板１０の露光開口１１、ガイドピン１２ｄと第２の羽根部材３０のスリット孔３２ｃの部品精度を管理して適正な位置に設定する。   FIG. 12A shows a state in which the second blade member 30 moves to the left in the figure and is in the open position. In the drawing, the guide pin 12d of the substrate 10 serves as a stopper member for the second blade member 30. In addition, the guide pin 12d is in contact with the right end of the slit hole 32c in the figure. The restriction of the guide pin 12d restricts the position of the diaphragm 31 at a position retracted by a predetermined amount with respect to the exposure opening 11 of the substrate 10. The retracted fully opened position is set to an appropriate position by managing the component accuracy of the exposure opening 11 of the substrate 10, the guide pin 12d, and the slit hole 32c of the second blade member 30.

また同図（ｂ）は開放位置に至った直後の状態を示すもので、ストッパー部材を兼ねるガイドピン１２ｄの中心とスリット孔３３に嵌合する駆動手段６０の伝動ピン６４ｂが押圧し作用力を付与する接点とを結ぶ直線上の中間部位に羽根部材の側端部から切り欠かれた凹溝で構成された緩衝部３４が形成されている。つまりこの切欠き溝は、羽根の突当て規制部がストッパー部材（ガイドピン１２ｄ）に当接する位置でこの突当て規制部と前記ストッパー部材との係合点（面若しくは線;以下同様）と、前記連結部と前記伝動ピンとの係合点とを結ぶ直線を過ぎる長さに形成してある。   FIG. 6B shows a state immediately after reaching the open position, and the center of the guide pin 12d also serving as a stopper member and the transmission pin 64b of the driving means 60 fitted in the slit hole 33 press the acting force. The buffer part 34 comprised by the concave groove notched from the side edge part of the blade | wing member is formed in the intermediate part on the straight line which connects the contact to provide. In other words, the notch groove has an engagement point (surface or line; the same shall apply hereinafter) between the abutting restricting portion and the stopper member at a position where the abutting restricting portion of the blade abuts against the stopper member (guide pin 12d). It is formed to have a length that passes a straight line connecting the connecting portion and the engagement point of the transmission pin.

従って、この凹溝はストッパー部材であるガイドピン１２ｄにスリット孔３２ｃの端部が規制された直後に前記駆動手段６０と駆動連結する前記連結部の接点に駆動手段６０から作用する慣性力によって緩衝部３４が図のように弾性変形し、この弾性変形によって羽根の突当て規制部はガイドピン１２ｄ側に付勢されることとなる。このように弾性変形により第２の羽根部材３０のリバウンドが吸収され、絞り部３１の退避位置からのリバウンドを軽減することが出来る。この結果、緩衝部３４を有さない場合と比較して絞り部３１の露光開口１１からの退避距離Ｌ２を設計上小さく設定することが出来、装置のコンパクト化を図ることが出来る。   Accordingly, the concave groove is buffered by the inertial force acting from the driving means 60 on the contact point of the connecting portion that is drivingly connected to the driving means 60 immediately after the end of the slit hole 32c is regulated by the guide pin 12d that is a stopper member. The portion 34 is elastically deformed as shown in the figure, and the elastic contact of the blade is biased toward the guide pin 12d. Thus, the rebound of the second blade member 30 is absorbed by the elastic deformation, and the rebound from the retracted position of the throttle portion 31 can be reduced. As a result, the retracting distance L2 from the exposure opening 11 of the diaphragm 31 can be set small as compared with the case where the buffer 34 is not provided, and the apparatus can be made compact.

また一方、図１３（ａ）は第２の羽根部材３０が同図右方向に移動し閉鎖位置にある状態を示し、図中、基板１０のガイドピン１２ｄが開放位置と同様に羽根部材３０のストッパー部材を兼ね、このガイドピン１２ｄがスリット孔３２ｃの同図左端と当接状態となっている。このガイドピン１２ｄの規制により絞り部３１が基板１０の露光開口１１の中心に対し所定量行き過ぎた進入位置で位置規制される。この進入した規制位置は基板１０の露光開口１１、ガイドピン１２ｄと第２羽根部材３０のスリット孔３２ｃの部品精度によって適切な位置に設定する。   On the other hand, FIG. 13A shows a state in which the second blade member 30 moves to the right in the drawing and is in the closed position. In the drawing, the guide pin 12d of the substrate 10 is similar to the open position of the blade member 30. Also serving as a stopper member, the guide pin 12d is in contact with the left end of the slit hole 32c in the figure. Due to the restriction of the guide pin 12d, the position of the diaphragm 31 is restricted at an approach position that exceeds a predetermined amount with respect to the center of the exposure opening 11 of the substrate 10. The entered restricting position is set to an appropriate position according to the component accuracy of the exposure opening 11 of the substrate 10, the guide pin 12 d and the slit hole 32 c of the second blade member 30.

また同図（ｂ）は閉鎖位置に成った直後の状態を示すもので、ストッパー部材を兼ねるガイドピン１２ｄの中心とスリット孔３３の駆動手段６０の駆動ピン６４ｂが押圧し作用力を付与する接点とを結ぶ直線上の中間部位に羽根部材の側端部から切り欠かれた凹溝で構成された緩衝部３４が形成されている。また、この凹溝の溝はストッパー部材であるガイドピン１２ｄにスリット孔３２ｃの端部が規制された直後に前記駆動手段６２０と駆動連結する前記連結部の接点に加えられ前記ストッパー部材の中点を結ぶ直線方向に作用する駆動手段６０の作用力により緩衝部３４が図のように弾性変形し得る深さに形成している。この弾性変形により第２の羽根部材３０のリバウンドが吸収され、絞り部３１の退避位置からのリバウンドを軽減することが出来る。   FIG. 4B shows a state immediately after the closed position is reached, and the center of the guide pin 12d also serving as a stopper member and the contact point where the drive pin 64b of the drive means 60 of the slit hole 33 is pressed to give an acting force. The buffer part 34 comprised by the concave groove notched from the side edge part of the blade | wing member is formed in the intermediate part on the straight line which ties. Further, the groove of the concave groove is added to the contact point of the connecting portion that is drivingly connected to the driving means 620 immediately after the end of the slit hole 32c is restricted by the guide pin 12d that is a stopper member. The buffer portion 34 is formed to a depth that can be elastically deformed as shown in the figure by the acting force of the driving means 60 acting in the linear direction connecting the two. Due to this elastic deformation, rebound of the second blade member 30 is absorbed, and rebound from the retracted position of the throttle portion 31 can be reduced.

この結果、緩衝部３４を備えない場合と比較して絞り部３１の露光開口１１からの進入距離Ｌ４を設計上小さく設定することが出来、同時に装置のコンパクト化を図ることが可能である。尚、ガイドピン１２ｄが第２の羽根部材３０のストッパー部材を兼ねているが、他のガイドピン１２ａ、１２ｃのいずれか、また３つのガイドピン１２ａ、１２ｃ、１２ｄが共に、更に新たに基板１０にピンを植設しストッパー部材としても良い。また、前記羽根部材２０、３０のリバウンド防止として各羽根部材に緩衝部２４、３４を設けたが装置の作動速度、装置のスペック等で異なるリバウンド量に応じ、そのリバウンド量が比較的小さい場合には片方の羽根部材に緩衝部を施すことでも良い。   As a result, compared with the case where the buffer part 34 is not provided, the approach distance L4 from the exposure opening 11 of the diaphragm part 31 can be set small in design, and at the same time, the apparatus can be made compact. The guide pin 12d also serves as a stopper member for the second blade member 30, but any one of the other guide pins 12a, 12c and the three guide pins 12a, 12c, 12d are newly added to the substrate 10. It is also possible to plant a pin on the stopper member. In addition, in order to prevent the rebound of the blade members 20 and 30, the shock absorbers 24 and 34 are provided in each blade member, but the rebound amount is relatively small according to the rebound amount that varies depending on the operation speed of the device, the specifications of the device, etc. May be provided with a buffer portion on one of the blade members.

次に上述の光量調整装置を用いた光学機器について説明する。図１４はプロジェクタ装置を示し、ケーシング内にＲＧＢ３種類の発光ＬＥＤを一組とする複数個の白色光源からなる光源部１００と、この白色光源からの光をＲＧＢ三原色に分光する分光部と、画像データ入力部からの信号に基づいて画像を形成する画像形成部と、上記分光部から画像形成部に照射した光を投光する投光部とから構成されている。   Next, an optical apparatus using the above-described light amount adjusting device will be described. FIG. 14 shows a projector device, in which a light source unit 100 composed of a plurality of white light sources having a set of RGB three types of light emitting LEDs in a casing, a spectroscopic unit that splits the light from the white light source into three primary colors of RGB, and an image The image forming unit includes an image forming unit that forms an image based on a signal from the data input unit, and a light projecting unit that projects light emitted from the spectroscopic unit to the image forming unit.

一般にプロジェクタへの画像入力の方法としてはＲＧＢ信号、コンポーネント信号、ハイビジョン信号、ビデオ信号等があり、ＲＧＢ信号は例えばコンピュータの画像出力端子からプロジェクタに信号を送る場合であり、コンポーネント信号はＤＶＤプレーヤ、ハイビジョン信号はハイビジョンテレビなどのチューナ、ビデオ信号はビデオデッキなどの出力端子とプロジェクタ装置とを接続する。   In general, there are RGB signals, component signals, high-definition signals, video signals, and the like as image input methods to the projector. The RGB signals are, for example, signals sent from the image output terminal of the computer to the projector. A high-definition signal is connected to a tuner such as a high-definition television, and a video signal is connected to an output terminal such as a video deck and a projector device.

図１４に示すＨはプロジェクタ、Ｓは画像を投影する為のスクリーンである。プロジェクタＨには投写のための光源１００が備えられ、ＲＧＢ３種類の発光ＬＥＤを一組とする複数個の白色光源からなる発光素子が内蔵されている。そして光源１００から射出された光は各素子自体前方に配置された対物レンズ（図示せず）によって集光され、インテグレータレンズ３００及び中央部位に矩形の開口４００ａを備えた遮光板４００でほぼ矩形の平行光とし斑の少ない光として照射する。そこで光源１００とインテグレータレンズ３００との間に前述の光量調整装置６００が配置され、その構成は上述の光量調整装置と同一である。   In FIG. 14, H is a projector, and S is a screen for projecting an image. The projector H is provided with a light source 100 for projection, and a light emitting element composed of a plurality of white light sources each including RGB three types of light emitting LEDs is incorporated. The light emitted from the light source 100 is collected by an objective lens (not shown) disposed in front of each element itself, and is substantially rectangular by the integrator lens 300 and the light shielding plate 400 having a rectangular opening 400a at the central portion. Irradiate as parallel light and light with few spots. Therefore, the light amount adjusting device 600 described above is disposed between the light source 100 and the integrator lens 300, and the configuration thereof is the same as that of the above light amount adjusting device.

そしてこの光量調整装置６００で光量調節された光は液晶パネルへの集光効率と周辺光量比を改善するインテグレータレンズ３００と遮光板４００を通過した光は、反射ミラー１２０ａによりほぼ直角に折り曲げられる。この光は分光ミラーによってＲ、Ｇ、Ｂ三原色に分岐されるが、まずＧ光とＲ光を透過させＢ光のみを反射させる特性を持ったダイクロイックミラー１００ａにより反射分離されたＢ光は、さらに反射ミラー１２０ｂを介して集光レンズ５００aに導かれ平行光に集光されて液晶パネル８００ａを透過しＢ光の画像として合成プリズム１１０に至るように構成されている。また、１段目のダイクロイックミラー１００aを透過したＧ光とＲ光は、Ｒ光を透過させＧ光を反射させる特性を持った２段目のダイクロイックミラー１００ｂにより反射分離されたＧ光は、集光レンズ５００ｂで平行光に集光され液晶パネル８００ｂを透過しＧ光の画像として合成プリズム１１０に至る。   The light whose light amount has been adjusted by the light amount adjusting device 600 is bent substantially at right angles by the reflecting mirror 120a, after passing through the integrator lens 300 and the light shielding plate 400 for improving the light collection efficiency and the peripheral light amount ratio to the liquid crystal panel. This light is branched into R, G, and B primary colors by the spectroscopic mirror. First, the B light reflected and separated by the dichroic mirror 100a having the characteristic of transmitting only the G light and the R light and reflecting only the B light is further The light beam is guided to the condensing lens 500a through the reflection mirror 120b, condensed into parallel light, transmitted through the liquid crystal panel 800a, and reaches the combining prism 110 as an image of B light. The G light and R light transmitted through the first stage dichroic mirror 100a are reflected and separated by the second stage dichroic mirror 100b having the characteristic of transmitting R light and reflecting G light. The light is condensed into parallel light by the optical lens 500b, passes through the liquid crystal panel 800b, and reaches the combining prism 110 as an image of G light.

同様に２段目のダイクロイックミラー１００ｂを透過したＲ光は、２枚の反射ミラー１２０ｃ、１２０ｄを介して集光レンズ５００ｃに導かれ平行光に集光されて液晶パネル８００ｃを透過しＲ光の画像として合成プリズム１１０に至る。そこで合成プリズム１１０にはＲ、Ｇ、Ｂ三原色が１つに合成されカラー画像として投影レンズ９００に導かれ、この投影レンズ９００で適宜拡大され前方のスクリーンＳに投写される。   Similarly, the R light transmitted through the second stage dichroic mirror 100b is guided to the condensing lens 500c through the two reflecting mirrors 120c and 120d, is condensed into parallel light, and is transmitted through the liquid crystal panel 800c to transmit the R light. The image reaches the synthesis prism 110 as an image. Therefore, the R, G, and B primary colors are combined into one by the combining prism 110 and guided to the projection lens 900 as a color image, and is appropriately enlarged by the projection lens 900 and projected onto the front screen S.

本発明に係る光量調整装置の外観を示す斜視図。The perspective view which shows the external appearance of the light quantity adjustment apparatus which concerns on this invention. 図１の装置の分解斜視図。FIG. 2 is an exploded perspective view of the apparatus of FIG. 1. 図１の装置における基板の正面平面図。FIG. 2 is a front plan view of a substrate in the apparatus of FIG. 1. 図１の装置における一方の羽根部材の正面平面図。The front top view of one blade member in the apparatus of FIG. 図１の装置における他方の羽根部材の正面平面図。The front top view of the other blade | wing member in the apparatus of FIG. 図１の装置における押え板の正面平面図。FIG. 2 is a front plan view of a presser plate in the apparatus of FIG. 1. 図１の装置における駆動手段支持フレームの正面平面図。FIG. 2 is a front plan view of a drive means support frame in the apparatus of FIG. 1. 図１の装置における駆動手段の正面平面図。FIG. 2 is a front plan view of driving means in the apparatus of FIG. 1. 図１の装置におけるフレームカバーの正面平面図。The front plan view of the frame cover in the apparatus of FIG. 図１の装置における一方の羽根部材の開放状態でのリバウンド吸収状態説明図を示し、（ａ）は第１の羽根部材が移動し開放位置にある状態であり、（ｂ）は第１の羽根部材が開放位置に至った直後の状態である。The rebound absorption state explanatory drawing in the open state of one blade member in the apparatus of FIG. 1 is shown, (a) is the state which the 1st blade member moves and exists in an open position, (b) is the 1st blade This is the state immediately after the member reaches the open position. 図１の装置における一方の羽根部材の閉鎖状態でのリバウンド吸収状態説明図を示し、（ａ）は第１の羽根部材が同図左方向に移動しガイドピンがスリット孔の右端縁と当接した状態であり、（ｂ）は駆動手段が慣性によって第１の羽根部材の緩衝部を弾性変形させた状態である。The rebound absorption state explanatory drawing in the closed state of one blade member in the apparatus of FIG. 1 is shown, (a) moves the 1st blade member to the left direction of the same figure, and a guide pin contact | abuts the right edge of a slit hole (B) is a state in which the driving means elastically deforms the buffer portion of the first blade member due to inertia. 図１の装置における他方の羽根部材の開放状態でのリバウンド吸収状態説明図を示し、（ａ）は第２の羽根部材が移動し開放位置にある状態であり、（ｂ）は第２の羽根部材が開放位置に至った直後の状態である。The rebound absorption state explanatory drawing in the open state of the other blade member in the apparatus of FIG. 1 is shown, (a) is a state in which the second blade member moves and is in the open position, and (b) is the second blade. This is the state immediately after the member reaches the open position. 図１の装置における他方の羽根部材の閉鎖状態でのリバウンド吸収状態説明図を示し、（ａ）は第２の羽根部材が同図左方向に移動しガイドピンがスリット孔の右端縁と当接した状態であり、（ｂ）は駆動手段が慣性によって第２の羽根部材の緩衝部を弾性変形させた状態である。The rebound absorption state explanatory drawing in the closed state of the other blade member in the apparatus of FIG. 1 is shown, (a) moves the second blade member leftward in the same figure, and the guide pin contacts the right edge of the slit hole. (B) is a state where the driving means elastically deforms the buffer portion of the second blade member due to inertia. 上記光量調整装置を組み込んだ光学機器の一例としてプロジェクタ装置を示す説明図。Explanatory drawing which shows a projector apparatus as an example of the optical apparatus incorporating the said light quantity adjustment apparatus.

符号の説明Explanation of symbols

１０ 基板
１２ａ，１２ｂ，１２ｃ，１２ｄ ガイドピン（ストッパー部材）
２０ 第１の羽根部材
２２ａ，２２ｂ，２２ｃ スリット孔
２３、３３ スリット孔
２４、３４ 緩衝部
３０ 第２の羽根部材
３２ａ，３２ｂ，３２ｃ スリット孔
４０ 押え板
５０ 駆動手段支持フレーム
６０ 駆動手段
７０ フレームカバー
８０ ヨーク 10 Substrate 12a, 12b, 12c, 12d Guide pin (stopper member)
20 1st blade member 22a, 22b, 22c Slit hole 23, 33 Slit hole 24, 34 Buffer part 30 2nd blade member 32a, 32b, 32c Slit hole 40 Holding plate 50 Drive means support frame 60 Drive means 70 Frame cover 80 York

Claims (6)

光路開口を有する基板と、
上記基板に略々直線方向に移動自在に支持され上記光路開口を開閉する一対の羽根部材と、
上記一対の羽根部材を互いに逆方向に作動する駆動手段と、
上記基板に設けられ上記一対の羽根部材の全開及び／又は全閉位置でそれぞれの羽根部材を突当て規制するストッパー部材とを備えた光量調整装置において、
上記駆動手段は、駆動回転軸と、この駆動回転軸に支持した伝動アーム部材と、この伝動アーム部材に設けた一対の伝動ピンとで構成され、
上記一対の羽根部材は、それぞれ上記伝動ピンと結合する駆動連結部と、上記ストッパー部材と係合する突当て規制部とを有し、
上記一対の羽根部材の少なくとも一方は、上記駆動連結部と上記突当て規制部との間に弾性変形可能な緩衝部を備え、
この緩衝部は上記突当て規制部が上記ストッパー部材に当接する際に弾性変形して該突当て規制部をストッパー部材側に付勢する凹溝で構成されていることを特徴とする光量調整装置。 A substrate having an optical path opening;
A pair of blade members which are supported by the substrate so as to be movable in a substantially linear direction, and which open and close the optical path opening;
Drive means for operating the pair of blade members in opposite directions;
A light amount adjusting device including a stopper member provided on the substrate and configured to abut against each of the blade members at the fully open and / or fully closed position of the pair of blade members;
The drive means includes a drive rotation shaft, a transmission arm member supported on the drive rotation shaft, and a pair of transmission pins provided on the transmission arm member.
Each of the pair of blade members includes a drive connecting portion that is coupled to the transmission pin, and a bump restricting portion that is engaged with the stopper member,
At least one of the pair of blade members includes a buffer portion that can be elastically deformed between the drive connecting portion and the abutment regulating portion,
The buffering portion is constituted by a concave groove that elastically deforms when the abutting restricting portion comes into contact with the stopper member and biases the abutting restricting portion toward the stopper member. . 前記一対の羽根部材は、それぞれ前記基板に設けたガイドピンと係合するスリット溝を備え、上記ガイドピンで前記ストッパー部材が構成され、上記スリット溝の端面で前記羽根部材の突当て規制部が構成され、
前記緩衝部は上記ストッパー部材を構成するガイドピンと前記駆動連結部との間に形成されていることを特徴とする請求項１に記載の光量調整装置。 Each of the pair of blade members includes a slit groove that engages with a guide pin provided on the substrate, the stopper pin is configured by the guide pin, and the abutting restriction portion of the blade member is configured by an end surface of the slit groove. And
The light amount adjusting device according to claim 1, wherein the buffer portion is formed between a guide pin constituting the stopper member and the drive connecting portion. 前記羽根部材は、基端部に前記駆動連結部を、先端部に前記光路開口を覆う絞り開口部を有し、この駆動連結部と絞り開口部との間に前記突当て規制部と前記緩衝部が配置されていることを特徴とする請求項１又は２に記載の光量調整装置。   The blade member has a drive opening at the base end and an aperture opening at the distal end that covers the optical path opening, and the bump restricting portion and the buffer between the drive connection and the aperture opening. The light quantity adjusting device according to claim 1, wherein a portion is arranged. 前記緩衝部を構成する凹溝は、前記羽根部材の側縁に形成した切欠溝で構成され、
この切欠溝は前記突当て規制部が前記ストッパー部材に規制された状態で前記伝動ピンの作用で羽根部材を弾性変形する長さ形状に構成されていることを特徴とする請求項１乃至３の何れかの項に記載の光量調整装置。 The concave groove constituting the buffer portion is constituted by a notch groove formed on a side edge of the blade member,
4. The cutout groove according to claim 1, wherein the notch groove is configured to have a length shape that elastically deforms the blade member by the action of the transmission pin in a state in which the abutting restriction portion is restricted by the stopper member. The light quantity adjusting device according to any one of the items. 前記凹溝は、前記羽根部材の外縁から羽根中央部に至る切欠き溝で構成され、この切欠き溝は、前記突当て規制部が前記ストッパー部材に当接する位置でこの突当て規制部と前記ストッパー部材との係合点と、前記連結部と前記伝動ピンとの係合点とを結ぶ直線を過ぎる長さに形成されていることを特徴とする請求項１乃至３の何れかの項に記載の光量調整装置。   The concave groove is constituted by a notch groove extending from the outer edge of the blade member to the blade central portion, and the notch groove is located at a position where the bump restricting portion comes into contact with the stopper member and the bump restricting portion. The light quantity according to any one of claims 1 to 3, wherein the light amount is formed so as to pass a straight line connecting an engagement point with a stopper member and an engagement point between the coupling portion and the transmission pin. Adjustment device. 光路開口とこの光路開口に配置され光を集光若しくは投光する光学レンズと、
この光学レンズの結像を撮像する撮像手段又は上記光学レンズに投影する光学手段と、
上記光学レンズを通過する光の光量を調整する光量調整装置とを備えた光学機器に於いて、
前記光量調整装置は、
光路開口を有する基板と、
上記基板に略々直線方向に移動自在に支持され上記光路開口を開閉する一対の羽根部材と、
上記一対の羽根部材を互いに逆方向に作動する駆動手段と、
上記基板に設けられ上記一対の羽根部材の全開及び／又は全閉位置でそれぞれの羽根部材を突当て規制するストッパー部材とを備え、
上記駆動手段は、駆動回転軸と、この駆動回転軸に支持した伝動アーム部材と、この伝動アーム部材に設けた一対の伝動ピンとで構成され、
上記一対の羽根部材は、それぞれ上記伝動ピンと結合する駆動連結部と、上記ストッパー部材と係合する突当て規制部とを有し、
上記一対の羽根部材の少なくとも一方は、上記駆動連結部と上記突当て規制部との間に弾性変形可能な緩衝部を備え、
この緩衝部は上記突当て規制部が上記ストッパー部材に当接する際に弾性変形して該突当て規制部をストッパー部材側に付勢する凹溝で構成されていることを特徴とする光学機器。 An optical lens that is disposed in the optical path aperture and that is disposed in the optical path aperture to collect or project light;
Imaging means for imaging the image of the optical lens or optical means for projecting onto the optical lens;
In an optical apparatus comprising a light amount adjusting device that adjusts a light amount of light passing through the optical lens,
The light amount adjusting device is:
A substrate having an optical path opening;
A pair of blade members which are supported by the substrate so as to be movable in a substantially linear direction, and which open and close the optical path opening;
Drive means for operating the pair of blade members in opposite directions;
A stopper member that is provided on the substrate and that restricts each blade member to abut at the fully open and / or fully closed position of the pair of blade members;
The drive means includes a drive rotation shaft, a transmission arm member supported on the drive rotation shaft, and a pair of transmission pins provided on the transmission arm member.
Each of the pair of blade members includes a drive connecting portion that is coupled to the transmission pin, and a bump restricting portion that is engaged with the stopper member,
At least one of the pair of blade members includes a buffer portion that can be elastically deformed between the drive connecting portion and the abutment regulating portion,
The buffer is configured by a concave groove that elastically deforms when the abutting restricting portion comes into contact with the stopper member and biases the abutting restricting portion toward the stopper member.

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