JP2011095633A - Light quantity controller - Google Patents

Light quantity controller Download PDF

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JP2011095633A
JP2011095633A JP2009251438A JP2009251438A JP2011095633A JP 2011095633 A JP2011095633 A JP 2011095633A JP 2009251438 A JP2009251438 A JP 2009251438A JP 2009251438 A JP2009251438 A JP 2009251438A JP 2011095633 A JP2011095633 A JP 2011095633A
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shielding member
light shielding
light
drive transmission
opening
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Tomihiro Wakayama
富裕 若山
Chiharu Katagiri
千春 片桐
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Nidec Precision Corp
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Nidec Copal Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To hold output efficiency of an electromechanical transducer and then to reduce the size and cost of a light quantity controller. <P>SOLUTION: The light quantity controller has a light shielding member which enters/retreats from an opening 2 provided in a holding member 1 by driving force of the electromechanical transducer 50. By transmitting the driving force of the electromechanical transducer to the light shielding member from a pressing member 52 stuck to one end face in an expansion/contraction direction of the electromechanical transducer 50 through a light shielding member driving transmission part, the light shielding member enters the opening 2, and a biasing force of an elastic member 8 is applied to the light shielding member, to allow the light shielding member to retreat from the opening 2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、制御電圧を印加され伸縮する電気−機械変換素子を駆動源として、遮光部材を移動させて光路を通過する光量を制御する光量制御装置に関する。   The present invention relates to a light amount control device that controls an amount of light passing through an optical path by moving a light shielding member using an electro-mechanical conversion element that is expanded and contracted by applying a control voltage as a drive source.

従来の光量制御装置としては、地板に設けられた絞り羽根(遮光部材)がアイリスモータやステッピングモータなどの電磁モータで駆動されている。しかし、電磁モータはマグネットとコイル等で構成されているので、部品点数が多く、構造が複雑になり、組立が難しく、高コストになり、小型化が難しいといった問題があり、電磁モータを使用する光量制御装置の小型化にも限界がある。さらに、光量制御装置の小型化により磁気干渉を生じない電磁以外の駆動源を必要とされる。   As a conventional light quantity control device, a diaphragm blade (light shielding member) provided on a base plate is driven by an electromagnetic motor such as an iris motor or a stepping motor. However, since an electromagnetic motor is composed of a magnet and a coil, there are problems such as a large number of parts, a complicated structure, difficulty in assembly, high cost, and difficulty in miniaturization. There is a limit to miniaturization of the light quantity control device. Furthermore, a drive source other than electromagnetic that does not cause magnetic interference is required due to the miniaturization of the light quantity control device.

そこで、光量制御装置の駆動源として電気−機械変換素子(例えば圧電素子)を用いることが提案されている(例えば特許文献1参照)。従来の電気−機械変換素子を用いた駆動装置は、インパクト方式(IDM)やStic−Slip方式及びスムースインパクト方式(SIDM)等の方式で、一般的に知られている。   Thus, it has been proposed to use an electro-mechanical conversion element (for example, a piezoelectric element) as a drive source of the light quantity control device (for example, see Patent Document 1). Conventional drive devices using electro-mechanical transducers are generally known in a system such as an impact system (IDM), a stick-slip system, and a smooth impact system (SIDM).

特許文献1に記載された光量制御装置は、地板と、4枚の絞り羽根(遮光部材)と、動輪と、地板に取付けられた圧電アクチュエータとによって構成される。圧電アクチュエータは、1つの絞り羽根に係入された摺動嵌合部が摩擦係合した駆動軸と、駆動軸の一端に固着された第1圧電素子と、駆動軸の他端に固着された第2圧電素子とを備え、第1及び第2圧電素子が駆動軸の軸線方向に高速変位と低速変位とを繰り返し行うことで摩擦係合部が軸線方向に、大きな一定の移動量を持って移動される構成である。   The light quantity control device described in Patent Document 1 includes a base plate, four diaphragm blades (light shielding members), a driving wheel, and a piezoelectric actuator attached to the base plate. The piezoelectric actuator has a drive shaft frictionally engaged with a sliding fitting portion engaged with one diaphragm blade, a first piezoelectric element fixed to one end of the drive shaft, and fixed to the other end of the drive shaft. A second piezoelectric element, and the first and second piezoelectric elements repeatedly perform high-speed displacement and low-speed displacement in the axial direction of the drive shaft, so that the friction engagement portion has a large constant movement amount in the axial direction. It is a configuration to be moved.

特開2006−121886号公報(図19参照)Japanese Patent Laying-Open No. 2006-121886 (see FIG. 19)

しかしながら、特許文献1に記載された光量制御装置によれば、比較的大きな摩擦係合部が移動することにより、その分のスペースが必要になり、また2個の圧電素子を使用するので、装置全体のサイズアップ、コストアップ及び消費電力が懸念され、また光軸方向の寸法を大きく取る構造となっている。また、この立方体の圧電素子を小さくしていくと、有効な圧電効果を生起する面積部分は小さくなっても電極形成部を小さくするには限界があるため、電極形成部の素子幅に対する比率は大きくなり、圧電素子の出力効率が低いものとなる。   However, according to the light amount control device described in Patent Document 1, a relatively large frictional engagement portion moves, so that a space for that amount is required, and two piezoelectric elements are used. There is concern about the overall size, cost, and power consumption, and the structure has a large dimension in the optical axis direction. In addition, if this cubic piezoelectric element is made smaller, there is a limit to reducing the electrode forming part even if the area where the effective piezoelectric effect occurs is small, so the ratio of the electrode forming part to the element width is As a result, the output efficiency of the piezoelectric element becomes low.

本発明は、このような問題に対処することを課題とするものである。すなわち、電気−機械変換素子の出力効率を保持した上で、光量制御装置の小型化およびコストの低減を図ることが本発明の目的である。   An object of the present invention is to deal with such a problem. That is, it is an object of the present invention to reduce the size and cost of the light quantity control device while maintaining the output efficiency of the electromechanical conversion element.

前記目的を達成するため、本発明に係る光量制御装置は、次の構成を少なくとも具備する。   In order to achieve the above object, a light quantity control device according to the present invention comprises at least the following configuration.

本発明にかかる光量制御装置は、保持部材に設けられた開口内に進入、あるいは該開口内から退避するように移動可能に支持した遮光部材と、電圧を印加することにより伸縮動作する電気−機械変換素子と、該電気−機械変換素子の伸縮方向の一端面に固着された駆動部材と、前記電気−機械変換素子の伸縮方向の他端面に固着された押付部材と、前記駆動部材を摩擦係合状態に支持する前記保持部材に設けられた摩擦係合部材とを有する遮光部材駆動部と、前記遮光部材駆動部の押付部材に当接して、前記遮光部材を前記保持部材に設けられた前記開口内に進入退避するように移動させる遮光部材駆動伝達部と、前記遮光部材を前記開口内から退避させるように又は前記遮光部材を前記開口部内へ進入させるように前記遮光部材駆動伝達部を付勢する弾性部材と、を備えていることを特徴とする。   The light quantity control device according to the present invention includes a light shielding member that is movably supported so as to enter or retreat from an opening provided in a holding member, and an electro-mechanical device that expands and contracts by applying a voltage. Friction between the conversion element, a drive member fixed to one end surface of the electro-mechanical conversion element in the expansion / contraction direction, a pressing member fixed to the other end surface of the electro-mechanical conversion element in the expansion / contraction direction, and the drive member A light shielding member driving portion having a friction engagement member provided on the holding member supported in a combined state; and a pressing member of the light shielding member driving portion, and the light shielding member provided on the holding member A light shielding member drive transmission unit that moves so as to enter and retreat into the opening; and Characterized in that it comprises an elastic member for biasing the.

前記保持部材は、前記遮光部材の移動範囲を規制するストッパーを有することを特徴とする。   The holding member has a stopper that regulates a moving range of the light shielding member.

前記遮光部材は、前記保持部材に2個設けられ、前記遮光部材駆動部に設けられた押付部材の双方向の移動により、個別に駆動されることを特徴とする。   Two said light shielding members are provided in the said holding member, It drives individually by the bidirectional | two-way movement of the pressing member provided in the said light shielding member drive part, It is characterized by the above-mentioned.

前記遮光部材は、前記保持部材に2個設けられ、前記遮光部材駆動部に設けられた押付部材と、前記電気−機械変換素子の伸縮方向の前記電気−機械変換素子が固着されていない駆動部材の端部とによって前記2個の遮光部材が個別に駆動されることを特徴とする。   Two of the light shielding members are provided on the holding member, and a pressing member provided on the light shielding member driving portion and a driving member to which the electro-mechanical conversion element in the expansion / contraction direction of the electro-mechanical conversion element is not fixed The two light-shielding members are individually driven by the end portions.

本発明の光量制御装置によれば、電気−機械変換素子の出力効率を保持した上で、光量制御装置の小型化およびコストの低減を図ることができ、磁気干渉の影響を受けない装置を提供することができる。   According to the light amount control device of the present invention, it is possible to reduce the size and reduce the cost of the light amount control device while maintaining the output efficiency of the electromechanical conversion element, and to provide a device that is not affected by magnetic interference. can do.

本発明にかかる光量制御装置の第1実施例を示す斜視図で大口径状態を示す。1 is a perspective view showing a first embodiment of a light quantity control device according to the present invention, and shows a large aperture state. 同、裏面側の斜視図。The perspective view of the back side. 図1の分解斜視図。The exploded perspective view of FIG. 図1の平面図。The top view of FIG. 図1の(5)-(5)線断面図。(5)-(5) sectional view taken on the line of FIG. 図4に対応する平面図で中口径状態を示す。The plan view corresponding to FIG. 図5に対応する断面図で中口径状態を示す。The cross-sectional view corresponding to FIG. 図4に対応する平面図で小口径状態を示す。A small diameter state is shown in a plan view corresponding to FIG. 図5に対応する断面図で小口径状態を示す。A sectional view corresponding to FIG. 本発明にかかる光量制御装置の第2実施例を示す斜視図で大口径状態を示す。A large-diameter state is shown in a perspective view showing a second embodiment of the light quantity control device according to the present invention. 図10の裏面図で蓋状体を取り除いた状態を示す。The state which removed the lid-like body in the rear view of FIG. 10 is shown. 本発明にかかる光量制御装置の第3実施例を示す斜視図で大口径状態を示す。A large-diameter state is shown in a perspective view showing a third embodiment of the light quantity control device according to the present invention.

以下、本発明にかかる光量制御装置を実施するための最良の形態を図面に基づいて説明する。図1〜図9は本発明の第1実施例にかかる光量制御装置Aの構成図および動作図である。また、図10、図11は、本発明の第2実施例にかかる光量制御装置Bの構成図である。図12は、本発明の第3実施例にかかる光量制御装置Cの構成図である。   Hereinafter, the best mode for carrying out the light quantity control device according to the present invention will be described with reference to the drawings. 1 to 9 are a configuration diagram and an operation diagram of the light quantity control device A according to the first embodiment of the present invention. 10 and 11 are configuration diagrams of the light quantity control device B according to the second embodiment of the present invention. FIG. 12 is a block diagram of a light quantity control device C according to the third embodiment of the present invention.

最初に第1実施例の光量制御装置Aを説明する。第1実施例の光量制御装置Aは、図1〜図9に示すように、保持部材1と、該保持部材1に設けられた開口2内に対して進入退避するように回動する2個の第1遮光部材3および第2遮光部材4と、図4〜図9において左右方向に直線的に移動することにより、前記第1遮光部材3および第2遮光部材4を回動させる駆動力を発生する遮光部材駆動部5と、該遮光部材駆動部5の駆動力を前記第1遮光部材3および第2遮光部材4に対して、図4〜図9において左右方向に直線的に移動することにより伝達して、該第1遮光部材3および第2遮光部材4を回動させる第1遮光部材駆動伝達部6および第2遮光部材駆動伝達部7と、該第1遮光部材駆動伝達部6および第2遮光部材駆動伝達部7に対して、第1遮光部材3および第2遮光部材4を前記開口2内から退避させる付勢力を与える弾性部材8とを備えている。   First, the light quantity control device A of the first embodiment will be described. As shown in FIGS. 1 to 9, the light quantity control device A of the first embodiment has two holding members 1 and two pieces that rotate so as to enter and retreat into the openings 2 provided in the holding members 1. The first light-shielding member 3 and the second light-shielding member 4 and a driving force for rotating the first light-shielding member 3 and the second light-shielding member 4 by linearly moving in the left-right direction in FIGS. The generated light shielding member driving unit 5 and the driving force of the light shielding member driving unit 5 are linearly moved in the left-right direction in FIGS. 4 to 9 with respect to the first light shielding member 3 and the second light shielding member 4. , The first light shielding member drive transmission unit 6 and the second light shielding member drive transmission unit 7 that rotate the first light shielding member 3 and the second light shielding member 4, and the first light shielding member drive transmission unit 6 and The first light shielding member 3 and the second light shielding member 4 with respect to the second light shielding member drive transmission unit 7. And an elastic member 8 to provide a biasing force for retracting from the opening within 2.

なお、以下の説明では、前記遮光部材駆動部5の直線的な移動に沿う方向を左右方向とし、該左右方向と平面方向で直交する方向を上下方向とし、前記左右方向と鉛直方向で直交する方向を厚み方向とする。   In the following description, the direction along the linear movement of the light shielding member driving unit 5 is the left-right direction, the direction orthogonal to the left-right direction in the plane direction is the up-down direction, and the direction perpendicular to the left-right direction is perpendicular to the vertical direction. The direction is the thickness direction.

前記保持部材1は、図1〜図3に示すように、保持板10と、該保持板10と厚み方向で重なり合う蓋状体11とで構成してある。前記保持板10は、幅狭面101と、該幅狭面101の左右側縁から左右両方向に突出する幅広面102を有する平面視凸形状に形成してある。また、図1〜図3、図5、図7、図9に示すように、前記幅狭面101の下方両角部縁と下方中央部縁、および前記幅広面102の左右側縁から上方中央部を除く上側縁に、前記重なり合う蓋状体11を支持するとともに、前記第1遮光部材3および第2遮光部材4を収納し、かつ回動させるための動作空間Sを確保する複数の突起体10Aを突設してある。   As shown in FIGS. 1 to 3, the holding member 1 includes a holding plate 10 and a lid 11 that overlaps the holding plate 10 in the thickness direction. The holding plate 10 is formed in a convex shape in a plan view having a narrow surface 101 and a wide surface 102 projecting from the left and right side edges of the narrow surface 101 in both the left and right directions. Also, as shown in FIGS. 1 to 3, 5, 7, and 9, the lower corner portion edge and the lower center edge of the narrow surface 101, and the upper center portion from the left and right side edges of the wide surface 102. A plurality of protrusions 10A that support the overlapping lid-like body 11 on the upper edge except for, and store the first light-shielding member 3 and the second light-shielding member 4 and secure an operation space S for rotation. Is protruding.

前記保持板10の幅狭面101は、図6、図8に示すように、前記開口2を形成するとともに、前記弾性部材8を配置する部分として確保したものであり、前記保持板10の幅広面102は、前記第1遮光部材駆動伝達部6および第2遮光部材駆動伝達部7を配置するとともに、該第1遮光部材駆動伝達部6および第2遮光部材駆動伝達部7の左右方向の移動を支持する部分として確保したものである。前記幅広面102の突出幅は、前記第1遮光部材駆動伝達部6および第2遮光部材駆動伝達部7が左右方向に移動したときに、幅広面102の左右側縁から出ない幅としている。   As shown in FIGS. 6 and 8, the narrow surface 101 of the holding plate 10 forms the opening 2 and is secured as a portion where the elastic member 8 is arranged. On the surface 102, the first light shielding member drive transmission unit 6 and the second light shielding member drive transmission unit 7 are arranged, and the first light shielding member drive transmission unit 6 and the second light shielding member drive transmission unit 7 move in the left-right direction. It is secured as a part that supports. The protruding width of the wide surface 102 is a width that does not protrude from the left and right side edges of the wide surface 102 when the first light shielding member drive transmission unit 6 and the second light shielding member drive transmission unit 7 move in the left-right direction.

また、前記保持板10には、図1、図3、図4、図6、図8に示すように、その中央に前記開口2の一部を構成する穴部20と、前記第1遮光部材3の回動中心となる支軸103と、前記第2遮光部材4の回動中心となる支軸104と、前記第1遮光部材駆動伝達部6を前記幅広面102の左右方向に沿って移動自在に案内可能な左右方向に長い長穴部10Dと、前記第2遮光部材駆動伝達部7を前記幅広面102の左右方向に沿って移動自在に案内可能な左右方向に長い長穴部10Eとを形成してある。   Further, as shown in FIGS. 1, 3, 4, 6, and 8, the holding plate 10 has a hole 20 that forms a part of the opening 2 at the center thereof, and the first light shielding member. 3, a support shaft 103 serving as a rotation center of the third shaft 104, a support shaft 104 serving as a rotation center of the second light shielding member 4, and the first light shielding member drive transmission unit 6 moving along the left-right direction of the wide surface 102. A long hole portion 10D that can be guided freely in the left-right direction, and a long hole portion 10E that can guide the second light-shielding member drive transmission portion 7 movably along the left-right direction of the wide surface 102, Is formed.

また、前記保持板10には、図1、図3、図4、図6、図8に示すように、前記第1遮光部材駆動伝達部6を、前記幅広面102の左右方向に沿って移動自在に案内可能な左右方向に長い平面視長円状の案内突起部10Fと、前記第2遮光部材駆動伝達部7を、前記幅広面102の左右方向に沿って移動自在に案内可能な左右方向に長い平面視長円状の案内突起部10Gとを形成してある。   In addition, as shown in FIGS. 1, 3, 4, 6, and 8, the first light-shielding member drive transmission unit 6 is moved on the holding plate 10 along the left-right direction of the wide surface 102. A left and right direction capable of guiding the guide projection 10F, which is oblong in plan view and can be guided freely, and the second light-shielding member drive transmission portion 7 along the left and right direction of the wide surface 102. A long and long guide projection 10G having a plan view shape is formed.

前記蓋状体11は、図2、図3に示すように、前記保持板10と平面視同一の幅狭面111と幅広面112を有する凸形状を呈し、前記動作空間S内の前記第1遮光部材3、および第2遮光部材4を保持するものである。蓋状体11は、その中央に前記開口2の一部を構成し、前記穴部20と同軸をなす穴部21と、前記支軸103の他端を支持する軸穴11Aと、前記支軸104の他端を支持する軸穴11Bと、前記長穴部10Dと同軸をなす左右方向に長い長穴部11Cと、前記長穴部10Eと同軸をなす左右方向に長い長穴部11Dとを形成してある。また、前記幅広面112の上側縁中央部に前記遮光部材駆動部5を取り付けるための空間113を形成してある。   As shown in FIGS. 2 and 3, the lid-like body 11 has a convex shape having a narrow surface 111 and a wide surface 112 that are the same as those of the holding plate 10 in plan view, and the first body in the operation space S. The light shielding member 3 and the second light shielding member 4 are held. The lid-like body 11 constitutes a part of the opening 2 at the center thereof, a hole portion 21 that is coaxial with the hole portion 20, a shaft hole 11A that supports the other end of the support shaft 103, and the support shaft. A shaft hole 11B that supports the other end of 104, a long hole portion 11C that is long in the left-right direction coaxial with the long hole portion 10D, and a long hole portion 11D that is long in the left-right direction coaxial with the long hole portion 10E. It is formed. In addition, a space 113 for attaching the light shielding member driving unit 5 is formed at the center of the upper edge of the wide surface 112.

そして、前記構成の保持板10と蓋状体11を、前記突起体10Aで蓋状体11を支えるように重ね合わせ、ねじ等(不図示)により固着することにより、該保持板10と蓋状体11の間に前記動作空間Sが形成され、前記幅広面102、112側の上端中央部に、前記遮光部材駆動部5を前記動作空間内Sに挿入固定する固定空間S1が形成された保持部材1となる。また、同様に、保持部材1の幅狭面101、111の左右側縁、および下側縁に前記動作空間Sと連通するスリットS2〜S5が形成されており、該スリットS2〜S5は、第1遮光部材3、および第2遮光部材4がその回動位置によっては突出可能とすることもできる。この場合には、前記幅狭面101、111の平面積を小さくすることができるため、光量制御装置Aを全体的にさらに小型にすることができる。   Then, the holding plate 10 and the lid-like body 11 having the above-described configuration are overlapped so that the projection-like body 10A supports the lid-like body 11, and are fixed by screws or the like (not shown), whereby the holding plate 10 and the lid-like body 11 are fixed. The operation space S is formed between the bodies 11, and the fixed space S1 for inserting and fixing the light shielding member driving unit 5 in the operation space S is formed at the upper center portion on the wide surfaces 102 and 112 side. Member 1 is obtained. Similarly, slits S2 to S5 communicating with the operation space S are formed on the left and right edges and the lower edge of the narrow surfaces 101 and 111 of the holding member 1, and the slits S2 to S5 are The first light shielding member 3 and the second light shielding member 4 can be protruded depending on their rotational positions. In this case, since the plane areas of the narrow surfaces 101 and 111 can be reduced, the light quantity control device A can be further reduced in size as a whole.

前記開口2は、光量を制御するための光量制御穴であり、図5、図7、図9に示すように、前記動作空間Sで回動する前記第1遮光部材3、および第2遮光部材4が進入退避することにより、口径が変化するようにしてある。   The opening 2 is a light amount control hole for controlling the amount of light. As shown in FIGS. 5, 7, and 9, the first light shielding member 3 and the second light shielding member that rotate in the operation space S are used. The aperture is changed by entering and retracting 4.

前記第1遮光部材3および第2遮光部材4は、図2、図3、図5、図7、図9平面視くの字形状に形成され、前記動作空間S内に、くの字形状の曲部の突出側を左右外側に向けて、互いに前記開口2の上下方向の中心を境に左右対称となるように配置してある。   The first light-shielding member 3 and the second light-shielding member 4 are formed in a U shape in plan view in FIGS. 2, 3, 5, 7, and 9. The projecting side of the curved portion is directed left and right outside so as to be symmetrical with respect to the center of the opening 2 in the vertical direction.

前記第1遮光部材3には、該第1遮光部材3の左右回動中心となる前記支軸103が貫通する支持穴31と、前記長穴部10D、11Cに対して上下方向斜めに交差する方向に長い長穴部32と、前記開口2の口径よりも小径な光量制御穴(開口)33とを形成してある。   The first light shielding member 3 intersects the support hole 31 through which the support shaft 103 serving as the left and right rotation center of the first light shielding member 3 and the elongated hole portions 10D and 11C obliquely in the vertical direction. A long hole portion 32 that is long in the direction and a light amount control hole (opening) 33 having a diameter smaller than the diameter of the opening 2 are formed.

前記第2遮光部材4には、該第2遮光部材4の左右回動中心となる前記支軸104が貫通する支持穴41と、前記長穴部10E、11Dに対して上下方向斜めに交差する方向に長い長穴部42と、前記光量制御穴33の口径よりも小径な光量制御穴(開口)43とを形成してある。   The second light shielding member 4 crosses the support hole 41 through which the support shaft 104, which is the center of rotation of the second light shielding member 4, and the oblong hole portions 10 </ b> E and 11 </ b> D obliquely in the vertical direction. A long hole portion 42 that is long in the direction and a light amount control hole (opening) 43 that is smaller than the diameter of the light amount control hole 33 are formed.

前記第1遮光部材3と第2遮光部材4は、それぞれの支持穴31、41に貫通した支軸103、104に対して左右回動自在に支持されている。そして、図7、図9に示すように、前記第1遮光部材3と第2遮光部材4が、前記支軸103、104を回動中心として交互に左右回動して前記開口2に対して進入退避することにより、該開口2の口径を大、中、小の3段階に調節することができる。この開口2の口径は、前記第1遮光部材3と第2遮光部材4の双方が開口2から退避している状態が大口径、前記第1遮光部材3が開口2に進入している状態が中口径、前記第2遮光部材4が開口2に進入している状態が小口径となる。   The first light-shielding member 3 and the second light-shielding member 4 are supported so as to be turnable in the left-right direction with respect to the support shafts 103 and 104 penetrating the support holes 31 and 41, respectively. As shown in FIGS. 7 and 9, the first light shielding member 3 and the second light shielding member 4 are alternately rotated to the left and right around the support shafts 103 and 104, with respect to the opening 2. By entering and retreating, the diameter of the opening 2 can be adjusted in three stages of large, medium and small. The aperture 2 has a large aperture when both the first light-shielding member 3 and the second light-shielding member 4 are retracted from the aperture 2, and a state where the first light-shielding member 3 enters the aperture 2. The medium aperture and the state where the second light shielding member 4 enters the opening 2 are the small aperture.

また、前記第1遮光部材3と第2遮光部材4のくの字形状は、図7、図9に示すように、第1遮光部材3と第2遮光部材4の一方が開口2に進入したとき、他方のくの字形状の凹部に入り込むようにしている。該第1遮光部材3と第2遮光部材4の形状も、前記幅狭面101、111の平面積を小さくするのに貢献している。   In addition, as shown in FIGS. 7 and 9, one of the first light shielding member 3 and the second light shielding member 4 has entered the opening 2 as shown in FIGS. 7 and 9. At this time, it is designed to enter the other concave portion of the character shape. The shapes of the first light shielding member 3 and the second light shielding member 4 also contribute to reducing the plane area of the narrow surfaces 101 and 111.

前記遮光部材駆動部5は、図1〜図9に示すように、制御電圧を印加され伸縮する駆動部品である圧電素子等の電気−機械変換素子50と、該電気−機械変換素子50の左端面に固着した駆動部材51と、前記圧電素子等の電気−機械変換素子50の右端部に固着した押付部材52と、前記駆動部材51を係合保持する摩擦係合部材53とで構成してある。また、遮光部材駆動部5は、前記保持部材に対して、前記駆動部材51の軸方向が前記幅広面102、112の上側縁に平行となるように固着してある。   As shown in FIGS. 1 to 9, the light-shielding member driving unit 5 includes an electro-mechanical conversion element 50 such as a piezoelectric element that is a drive component that is expanded and contracted by applying a control voltage, and the left end of the electro-mechanical conversion element 50. The driving member 51 is fixed to the surface, the pressing member 52 is fixed to the right end of the electromechanical conversion element 50 such as the piezoelectric element, and the friction engagement member 53 engages and holds the driving member 51. is there. The light shielding member driving unit 5 is fixed to the holding member so that the axial direction of the driving member 51 is parallel to the upper edges of the wide surfaces 102 and 112.

前記駆動部材51は、比重が小さい強靭な材料(例えば、炭素繊維強化プラスチック(CFRP)等)より円筒形に形成してある。該駆動部材51は、回転軸の機能を必要としない構成要素であるから角棒形状等に形成した構成でもよい。   The drive member 51 is formed in a cylindrical shape from a tough material having a small specific gravity (for example, carbon fiber reinforced plastic (CFRP) or the like). Since the drive member 51 is a component that does not require the function of the rotating shaft, the drive member 51 may have a rectangular bar shape or the like.

押付部材52は、被駆動ヘッドを兼用するものであり、静止慣性力を必要とするために、前記駆動部材51と比較して比重の大きい材料により形成してある。該押付部材52は、前記電気−機械変換素子50に固着する固着部520と、前記保持板10の上下方向の中心線C1上に位置する押付突起521と、これら固着部520と押付突起521とを連結する連結部522とから構成してある。   The pressing member 52 also serves as a driven head and is formed of a material having a larger specific gravity than the driving member 51 in order to require a static inertia force. The pressing member 52 includes a fixing portion 520 that is fixed to the electromechanical conversion element 50, a pressing protrusion 521 that is positioned on a vertical center line C 1 of the holding plate 10, the fixing portion 520, and the pressing protrusion 521. It is comprised from the connection part 522 which connects.

前記押付突起521は、前記電気−機械変換素子50の左右方向の伸縮に伴って左右に移動し、図6に示すように、右方向の移動で、前記第1遮光部材駆動伝達部6に接触して、該第1遮光部材駆動伝達部6を同方向に押し動かし、図8に示すように、左方向への移動で、前記第2遮光部材駆動伝達部7に接触して、該第2遮光部材駆動伝達部7を同方向に押し動かすようにしてある。前記第1遮光部材駆動伝達部6の右方向の移動は、前記第1遮光部材3を開口2に対して進入させる方向であり、前記第2遮光部材駆動伝達部7の図面上左方向の移動は、前記第2遮光部材4を開口2に対して進入させる方向である。   The pressing protrusion 521 moves to the left and right as the electromechanical conversion element 50 expands and contracts in the left and right direction, and contacts the first light shielding member drive transmission unit 6 by moving in the right direction as shown in FIG. Then, the first light shielding member drive transmission portion 6 is pushed and moved in the same direction, and as shown in FIG. 8, the second light shielding member drive transmission portion 7 is brought into contact with the second light shielding member drive transmission portion 7 by moving leftward. The light shielding member drive transmission unit 7 is pushed and moved in the same direction. The rightward movement of the first light-shielding member drive transmission unit 6 is a direction in which the first light-shielding member 3 enters the opening 2, and the second light-shielding member drive transmission unit 7 moves leftward in the drawing. Is a direction in which the second light shielding member 4 enters the opening 2.

摩擦係合部材53は、前記駆動部材51を厚み方向の前記保持板10側から保持する固定係合部材53Aと、前記駆動部材51を前記蓋状体11側から保持する摩擦ばね部材53Bとから構成してある。   The friction engagement member 53 includes a fixed engagement member 53A that holds the drive member 51 from the holding plate 10 side in the thickness direction, and a friction spring member 53B that holds the drive member 51 from the lid-like body 11 side. It is configured.

前記固定係合部材53Aは、図3に示すように、平面視において前記幅広面102、112の中央部上側縁と平行の固定面530と、平面視において上下方向に平行、かつ側面視において前記駆動部材51が嵌入する凹形状の摩擦保持面531とを有する平面視L形状に形成してある。   As shown in FIG. 3, the fixed engagement member 53A includes a fixed surface 530 that is parallel to the upper edge of the central portion of the wide surfaces 102 and 112 in plan view, and is parallel to the vertical direction in plan view and in side view. It is formed in an L shape in plan view having a concave friction holding surface 531 into which the driving member 51 is fitted.

摩擦ばね部材53Bは、図3に示すように、平面視において前記幅広面102、112の中央部上側縁と平行の固定面532と、平面視において上下方向に平行、かつ側面視において摩擦保持面531に嵌入した前記駆動部材51を厚み方向から押さえる摩擦ばね面533と、を有する平面視L形状に形成してある。   As shown in FIG. 3, the friction spring member 53B includes a fixed surface 532 that is parallel to the upper edge of the center of the wide surfaces 102 and 112 in a plan view, and a friction holding surface that is parallel to the vertical direction in a plan view and that is parallel to the side view. It is formed in an L shape in a plan view having a friction spring surface 533 that presses the drive member 51 fitted in 531 in the thickness direction.

前記固定係合部材53Aと摩擦ばね部材53Bとは、図4〜図9に示すように、前記固定面530、532同士を厚み方向に重ね合わせることにより、前記摩擦保持面531と摩擦ばね面533とが厚み方向で正対するように形成してある。   As shown in FIGS. 4 to 9, the fixed engagement member 53 </ b> A and the friction spring member 53 </ b> B overlap the friction surfaces 531 and the friction spring surface 533 by overlapping the fixed surfaces 530 and 532 in the thickness direction. Are opposed to each other in the thickness direction.

すなわち、前記駆動部材51を摩擦保持面531に嵌入した状態で、前記固定面530、532同士を厚み方向に重ね合わせることによって、駆動部材51が摩擦係合部材53に支持される。そして、前記駆動部材51が摩擦係合部材53に支持された状態で、前記固定面530、532を前記固定空間S1に挿し込んで、該固定面530、532を前記保持板10に熱溶着等で固着することにより(100は熱溶着後の状態を示す)、前記遮光部材駆動部5を保持部材1に取り付けることができる。したがって、前記遮光部材駆動部5の保持部材1に対する取り付けを迅速、かつ容易に行うことができる。   That is, the driving member 51 is supported by the friction engagement member 53 by overlapping the fixing surfaces 530 and 532 in the thickness direction in a state where the driving member 51 is fitted into the friction holding surface 531. Then, with the drive member 51 supported by the friction engagement member 53, the fixed surfaces 530 and 532 are inserted into the fixed space S1, and the fixed surfaces 530 and 532 are thermally welded to the holding plate 10 or the like. The light shielding member driving unit 5 can be attached to the holding member 1 by being fixed with (100 indicates a state after heat welding). Therefore, the light shielding member driving unit 5 can be quickly and easily attached to the holding member 1.

前記第1遮光部材駆動伝達部6と第2遮光部材駆動伝達部7は、図1、図4に示すように、前記押付突起521を境に左右対称となるように配置してあり、図6、図8に示すように、第1遮光部材駆動伝達部6は、前記押付突起521の右方向への移動により、該押付突起521に押し動かされるように右方向に移動し、第2遮光部材駆動伝達部7は、前記押付突起521の左方向への移動により、該押付突起521に押し動かされるように右方向に移動するようにしてある。   As shown in FIGS. 1 and 4, the first light shielding member drive transmission unit 6 and the second light shielding member drive transmission unit 7 are arranged so as to be bilaterally symmetric with respect to the pressing protrusion 521. As shown in FIG. 8, the first light shielding member drive transmission unit 6 moves to the right so as to be pushed by the pressing projection 521 by the movement of the pressing projection 521 in the right direction, and the second light shielding member. The drive transmission unit 7 moves in the right direction so that the pressing protrusion 521 is pushed and moved by the movement of the pressing protrusion 521 in the left direction.

前記第1遮光部材駆動伝達部6には、図1、図3、図4、図6、図8に示すように、前記長穴部10D、11C、32に対してその長手方向に沿って移動自在に貫通するボス部60と、前記案内突起部10Fの長手方向の長さよりも長く、該案内突起部10Fに対して移動自在に嵌合する案内長穴部61と、前記弾性部材8に対して当接する当接突起62とを形成してある。   As shown in FIGS. 1, 3, 4, 6, and 8, the first light shielding member drive transmission unit 6 moves along the longitudinal direction with respect to the elongated holes 10 </ b> D, 11 </ b> C, and 32. A boss portion 60 that penetrates freely, a guide elongated hole portion 61 that is longer than the length of the guide projection portion 10F in the longitudinal direction and is movably fitted to the guide projection portion 10F, and the elastic member 8 The contact protrusion 62 is formed to contact with each other.

前記第2遮光部材駆動伝達部7には、図1、図3、図4、図6、図8に示すように、前記長穴部10E、11D、42に対してその長手方向に沿って移動自在に貫通するボス部70と、前記案内突起部10Gの長手方向の長さよりも長く、該案内突起部10Gに対して移動自在に嵌合する案内長穴部71と、前記弾性部材8に対して当接する当接突起72とを形成してある。   As shown in FIGS. 1, 3, 4, 6, and 8, the second light shielding member drive transmission unit 7 moves along the longitudinal direction with respect to the elongated holes 10 </ b> E, 11 </ b> D, and 42. A boss portion 70 that penetrates freely, a guide elongated hole portion 71 that is longer than the length of the guide projection portion 10G in the longitudinal direction and is movably fitted to the guide projection portion 10G, and the elastic member 8 A contact protrusion 72 is formed.

すなわち、前記第1遮光部材駆動伝達部6は、前記ボス部60が前記長穴部10D、32に嵌合するとともに、前記案内長穴61が前記案内突起部10Fに嵌合することにより、保持部材1に対して左右移動可能に支持される。同様に、前記第2遮光部材駆動伝達部7は、前記ボス部70が前記長穴部10E、42に嵌合するとともに、前記案内長穴部71が前記案内突起部10Gに嵌合することにより、保持部材1に対して左右移動可能に支持される。   That is, the first light-shielding member drive transmission portion 6 is held by fitting the boss portion 60 into the long hole portions 10D and 32 and fitting the guide long hole 61 to the guide projection portion 10F. The member 1 is supported so as to be movable left and right. Similarly, the second light-shielding member drive transmission portion 7 is configured such that the boss portion 70 is fitted into the long hole portions 10E and 42, and the guide long hole portion 71 is fitted to the guide projection portion 10G. The support member 1 is supported so as to be movable left and right.

前記弾性部材8は、前記幅狭面101の下方側に熱溶着等(100は熱溶着後の状態を示す)により固定する固定部80と、該固定部80の左右側縁から上方へ延長した2個の板ばね部81、82とから形成してある。   The elastic member 8 is fixed to the lower side of the narrow surface 101 by heat welding or the like (100 indicates a state after heat welding) and extends upward from the left and right side edges of the fixing portion 80. Two leaf spring portions 81 and 82 are formed.

前記板ばね81は、図1、図4に示すように、先端部分が前記当接突起62に対して右側縁に接触(近接)し、図6に示すように、前記第1遮光部材駆動伝達部6の右側(第1遮光部材3が開口2に進入する方向)への移動に対して湾曲することにより、該第1遮光部材駆動伝達部6に対して左側(第1遮光部材3が開口2から退避する方向)へ移動させる付勢力を与えるようにしてある。   As shown in FIGS. 1 and 4, the leaf spring 81 is in contact with (adjacent to) the right edge with respect to the abutting protrusion 62 as shown in FIGS. 1 and 4, and as shown in FIG. By curving with respect to the movement of the portion 6 to the right side (the direction in which the first light blocking member 3 enters the opening 2), the left side of the first light blocking member drive transmission portion 6 (the first light blocking member 3 is opened) The urging force for moving in the direction of retreat from 2) is applied.

前記板ばね82は、図1および図3に示すように、先端部分が前記当接突起72に対して左側縁に接触(近接)し、図8に示すように、前記第2遮光部材駆動伝達部7の左側(第2遮光部材4が開口2に進入する方向)への移動に対して湾曲することにより、該第2遮光部材駆動伝達部7に対して右側(第2遮光部材4が開口2から退避する方向)へ移動させる付勢力を与えるようにしてある。   As shown in FIGS. 1 and 3, the leaf spring 82 is in contact with (adjacent to) the left edge with respect to the contact protrusion 72 as shown in FIGS. 1 and 3, and as shown in FIG. By curving with respect to the movement to the left side of the portion 7 (the direction in which the second light shielding member 4 enters the opening 2), the right side of the second light shielding member drive transmission portion 7 (the second light shielding member 4 is opened) The urging force for moving in the direction of retreat from 2) is applied.

なお、本発明の弾性部材は、前記実施例に示した弾性部材8に限られず、前記第1遮光部材駆動伝達部6、および第2遮光部材駆動伝達部7に対して、前記した付勢力を作用させる構成を備えたものであればよい。また、前記実施例では、弾性部材8の付勢力を前記第1遮光部材駆動伝達部6、および第2遮光部材駆動伝達部7に対して作用させる構成を示したが、本発明では、たとえば、前記第1遮光部材3、および第2遮光部材4に直接付勢力を作用させる構成にしてもよい(図示せず)。   The elastic member of the present invention is not limited to the elastic member 8 shown in the above-described embodiment, and the urging force described above is applied to the first light shielding member drive transmission unit 6 and the second light shielding member drive transmission unit 7. What is necessary is just to have the structure made to act. Moreover, in the said Example, although the structure which makes the urging | biasing force of the elastic member 8 act with respect to the said 1st light-shielding member drive transmission part 6 and the 2nd light-shielding member drive transmission part 7 was shown, in this invention, for example, An urging force may be directly applied to the first light shielding member 3 and the second light shielding member 4 (not shown).

本実施例では、前記長穴部32が、前記第1遮光部材3の回動をガイドするガイド部として機能し、前記長穴部42が、前記第2遮光部材4の回動をガイドするガイド部として機能している。   In this embodiment, the elongated hole portion 32 functions as a guide portion that guides the rotation of the first light shielding member 3, and the elongated hole portion 42 guides the rotation of the second light shielding member 4. It functions as a department.

すなわち、前記第1遮光部材駆動伝達部6、および第2遮光部材駆動伝達部7の左右移動に伴って、前記ボス部60が長穴部10D、11Cを左右移動して、前記第1遮光部材3、第2遮光部材4を、前記支軸103、104を回動中心に回動させる。このとき、前記ボス部60、70の左右移動による変位を、該ボス部60、70に対して前記長穴部32、42が移動することにより吸収しながら、第1遮光部材3、第2遮光部材4の回動をガイドすることになる。   That is, as the first light-shielding member drive transmission unit 6 and the second light-shielding member drive transmission unit 7 move left and right, the boss 60 moves left and right through the long hole portions 10D and 11C, and the first light-shielding member. 3. The second light shielding member 4 is rotated around the support shafts 103 and 104 as the rotation center. At this time, the first light-shielding member 3 and the second light-shielding member 3 absorb the displacement due to the lateral movement of the boss parts 60 and 70 while the elongated holes 32 and 42 move with respect to the boss parts 60 and 70. The rotation of the member 4 is guided.

本実施例では、前記長穴部10Dが、前記第1遮光部材駆動伝達部6の左右移動範囲を規制するストッパーとして機能し、前記第1遮光部材3の進入退避方向の回動を規制している。そして、前記長穴部10Eが、前記第2遮光部材駆動伝達部7の左右移動範囲を規制するストッパーとして機能し、前記第2遮光部材4の進入退避方向の回動を規制している。   In the present embodiment, the elongated hole portion 10D functions as a stopper that restricts the lateral movement range of the first light shielding member drive transmission portion 6, and restricts the rotation of the first light shielding member 3 in the approaching and retracting direction. Yes. The elongated hole portion 10E functions as a stopper for restricting the lateral movement range of the second light shielding member drive transmission portion 7, and restricts the rotation of the second light shielding member 4 in the entering and retracting direction.

第1遮光部材駆動伝達部6、および第2遮光部材駆動伝達部7の左右移動範囲を規制するストッパーは、前記ボス部60、70が互いに、前記第1遮光部材3、および第2遮光部材4を進入退避方向へ回動させる方向に移動し、前記長穴部10Dおよび長穴部10Eの端縁に接触することにより、該ボス部60、70のこれ以上の移動を阻止するようにした構成である。   The stoppers for restricting the lateral movement range of the first light shielding member drive transmission unit 6 and the second light shielding member drive transmission unit 7 are such that the boss portions 60 and 70 are mutually connected to the first light shielding member 3 and the second light shielding member 4. Is moved in the direction of turning in the approaching and retracting direction, and the boss portions 60 and 70 are prevented from further movement by contacting the edge of the elongated hole portion 10D and the elongated hole portion 10E. It is.

前記長穴部10Dの長さは、前記ボス部60が前記第1遮光部材3を進入させる方向の長穴部10Dの端縁に接触したとき、前記第1遮光部材3の光量制御穴33の軸心が前記開口2の軸心と同心となり、前記ボス部60が前記第1遮光部材3を退避させる方向の長穴部10Dの端縁に接触したとき、前記第1遮光部材3が開口2と重ならず、かつ前記動作空間Sに位置する長さである。   The length of the long hole portion 10D is such that when the boss portion 60 contacts the edge of the long hole portion 10D in the direction in which the first light blocking member 3 enters, the light amount control hole 33 of the first light blocking member 3 When the axial center is concentric with the axial center of the opening 2 and the boss portion 60 comes into contact with the edge of the elongated hole portion 10D in the direction in which the first light shielding member 3 is retracted, the first light shielding member 3 is opened 2. And a length located in the operation space S.

また、前記長穴部10Eの長さも同様に、前記ボス部70が第2遮光部材4を進入させる方向へ移動して、前記長穴部10Eの端縁に接触したとき、前記第2遮光部材4の光量制御穴43の軸心が前記開口2の軸心と同心となり、前記ボス部70が前記第2遮光部材4を退避させる方向の長穴部10Eの端縁に接触したとき、前記第2遮光部材4が開口2と重ならず、かつ前記動作空間Sに位置する長さである。   Similarly, the length of the long hole portion 10E moves in the direction in which the boss portion 70 enters the second light shielding member 4 and contacts the edge of the long hole portion 10E. When the axial center of the light quantity control hole 43 is concentric with the axial center of the opening 2 and the boss 70 contacts the edge of the elongated hole 10E in the direction in which the second light shielding member 4 is retracted, the first 2 The length is such that the light shielding member 4 does not overlap the opening 2 and is located in the operation space S.

前記突起体10Hは、前記固定面530、532を前記固定空間S1に嵌入する際の位置決めとして機能している。   The protrusion 10H functions as positioning when the fixed surfaces 530 and 532 are fitted into the fixed space S1.

なお、前記第1遮光部材3、および第2遮光部材4のストッパーは、前記突起体10Hに、進入状態の前記第1遮光部材3、および第2遮光部材4が接触することにより、該第1遮光部材3、および第2遮光部材4のこれ以上の回動を阻止し、前記光量制御穴33、43の軸心が開口2の軸心と同心となる状態を保持するようにしてもよく、さらに、たとえば、前記幅狭面101の下方両角部縁に突設された突起体10Aを、第1遮光部材3、および第2遮光部材4が退避方向の回動で接触して、これ以上の回動を阻止するストッパーとして機能するようにしてもよい(図示せず)。   Note that the stoppers of the first light shielding member 3 and the second light shielding member 4 are formed by the first light shielding member 3 and the second light shielding member 4 in the approaching state coming into contact with the protrusion 10H. The light shielding member 3 and the second light shielding member 4 may be prevented from rotating further, and the axial center of the light quantity control holes 33 and 43 may be kept concentric with the axial center of the opening 2, Furthermore, for example, the first light shielding member 3 and the second light shielding member 4 are brought into contact with the protrusions 10A projecting from the lower corners of the narrow surface 101 by rotation in the retreat direction, and more than this. You may make it function as a stopper which prevents rotation (not shown).

以下、前記構成の光量制御装置Aの動作を説明すると、図4および図5は、大口径状態(初期状態)を、図6および図7は、中口径状態を、図8および図9は、小口径状態を、それぞれ示している。   Hereinafter, the operation of the light quantity control device A having the above-described configuration will be described. FIGS. 4 and 5 show a large-diameter state (initial state), FIGS. 6 and 7 show a medium-diameter state, and FIGS. The small diameter state is shown respectively.

前記大口径状態では、図4、図5に示すように、前記押付部材52の押付突起521が開口2の上下方向の中心線C1上にある。また、この状態では、前記第1遮光部材3が前記第1遮光部材駆動伝達部6および弾性部材8により、前記第2遮光部材4が前記第2遮光部材駆動伝達部7および弾性部材8により、前記開口2から退避している状態を保持している。また、前記第1遮光部材3および第2遮光部材4は、前記構成のストッパーにより回動が規制され、前記第1遮光部材駆動伝達部6および第2遮光部材駆動伝達部7は、前記構成のストッパーにより左右移動が規制されている。   In the large-diameter state, as shown in FIGS. 4 and 5, the pressing protrusion 521 of the pressing member 52 is on the vertical center line C <b> 1 of the opening 2. Further, in this state, the first light shielding member 3 is caused by the first light shielding member drive transmission portion 6 and the elastic member 8, and the second light shielding member 4 is caused by the second light shielding member drive transmission portion 7 and the elastic member 8. A state of being retracted from the opening 2 is maintained. The first light shielding member 3 and the second light shielding member 4 are restricted from rotating by the stopper having the above-described configuration, and the first light shielding member drive transmission unit 6 and the second light shielding member drive transmission unit 7 are configured as described above. Left-right movement is restricted by the stopper.

前記大口径状態から中口径状態にする場合、図6、図7に示すように、制御電圧を印加して前記電気−機械変換素子50の緩速伸長と急速収縮を繰り返すことで、右方向に移動する前記押付部材52の押付突起521が、前記第1遮光部材駆動伝達部6を右方向に移動させる。この前記第1遮光部材駆動伝達部6の右方向の移動と同時に、前記ボス部60が長穴部10D、11Cを右方向に移動し、前記構成のガイド部を介して、第1遮光部材3を開口2へ進入する方向に回動させる。開口2に進入した第1遮光部材3は、前記構成のストッパーにより、光量制御穴33の軸心と開口2の軸心とが同心になる位置で保持される。また、このとき、前記第1遮光部材駆動伝達部6には、第1遮光部材駆動伝達部6の移動に伴って湾曲する前記弾性部材8の板ばね81の弾性変形により、第1遮光部材3を開口2から退避させる方向(左方向)への付勢力が作用している。   When changing from the large-diameter state to the medium-diameter state, as shown in FIGS. 6 and 7, by applying a control voltage and repeating slow expansion and rapid contraction of the electro-mechanical conversion element 50, The pressing protrusion 521 of the moving pressing member 52 moves the first light shielding member drive transmission unit 6 in the right direction. Simultaneously with the movement of the first light shielding member drive transmission portion 6 in the right direction, the boss portion 60 moves to the right through the long hole portions 10D and 11C, and the first light shielding member 3 is interposed via the guide portion having the above-described configuration. Is rotated in the direction of entering the opening 2. The first light shielding member 3 that has entered the opening 2 is held at a position where the axis of the light quantity control hole 33 and the axis of the opening 2 are concentric by the stopper configured as described above. Further, at this time, the first light shielding member drive transmission unit 6 has the first light shielding member 3 due to the elastic deformation of the leaf spring 81 of the elastic member 8 which is curved as the first light shielding member drive transmission unit 6 moves. The urging force in the direction (left direction) for retracting from the opening 2 is acting.

前記中口径状態から小口径状態にする場合、図8、図9に示すように、制御電圧を印加して前記電気−機械変換素子50の急速伸長と緩速収縮を繰り返すことで、左方向に移動する前記押付部材52の押付突起521が、前記第2遮光部材駆動伝達部7を左方向に移動させる。この前記第2遮光部材駆動伝達部7の左方向の移動と同時に、前記ボス部60が長穴部10E、11Dを左方向に移動し、前記構成のガイド部を介して、第2遮光部材4を開口2へ進入する方向に回動させる。開口2に進入した第2遮光部材4は、前記構成のストッパーにより、光量制御穴43の軸心と開口2の軸心とが同心になる位置で保持される。また、このとき、前記第2遮光部材駆動伝達部7には、第2遮光部材駆動伝達部7の移動に伴って湾曲する前記弾性部材8の板ばね82の弾性変形により、第2遮光部材4を開口2から退避させる方向(右方向)への付勢力が作用している。   When changing from the medium diameter state to the small diameter state, as shown in FIGS. 8 and 9, by applying a control voltage and repeating rapid expansion and slow contraction of the electro-mechanical conversion element 50, the leftward direction is obtained. The pressing projection 521 of the moving pressing member 52 moves the second light shielding member drive transmission unit 7 in the left direction. Simultaneously with the leftward movement of the second light shielding member drive transmission portion 7, the boss portion 60 moves to the left in the long hole portions 10E and 11D, and the second light shielding member 4 is interposed via the guide portion having the above-described configuration. Is rotated in the direction of entering the opening 2. The second light-shielding member 4 that has entered the opening 2 is held at a position where the axis of the light quantity control hole 43 and the axis of the opening 2 are concentric by the stopper configured as described above. At this time, the second light-shielding member drive transmission portion 7 is provided with the second light-shielding member 4 by elastic deformation of the leaf spring 82 of the elastic member 8 that is curved as the second light-shielding member drive transmission portion 7 moves. A biasing force is acting in a direction (rightward direction) to retract from the opening 2.

前記中口径状態から小口径状態にする動作では、前記第2遮光部材駆動伝達部7を左方向に移動と同時に、前記第1遮光部材駆動伝達部6が前記付勢力により左方向へ移動するとともに、前記ボス部60が前記長穴部10D、11Cを左方向に移動して、前記構成のガイド部を介して第1遮光部材3を開口2から退避する方向へ回動させる。   In the operation of changing the medium aperture state to the small aperture state, the second light shielding member drive transmission unit 7 is moved leftward simultaneously with the first light shielding member drive transmission unit 6 being moved leftward by the biasing force. The boss portion 60 moves the elongated hole portions 10D and 11C to the left, and rotates the first light shielding member 3 in the direction of retreating from the opening 2 via the guide portion having the above-described configuration.

前記第1実施例の光量制御装置Aによれば、電気−機械変換素子50の出力効率を保持した上で、光量制御装置Aの小型化およびコストの低減を図ることができる。しかも、1個の電気−機械変換素子50で、第1遮光部材3および第2遮光部材4の2個の遮光部材を交互に回動させることができ、効率的に3段階の光量制御を行うことができる。さらに、前記ガイド部によって第1遮光部材3および第2遮光部材4の進入退避の回動を確実に行うことができる。さらに、前記ストッパーによって、前記第1遮光部材3および第2遮光部材4の光量制御穴33、43の軸心を開口2の軸心と確実に同心状態にすることができ、該第1遮光部材3および第2遮光部材4の退避状態を確実に保持することができる。   According to the light amount control device A of the first embodiment, the light amount control device A can be reduced in size and cost while the output efficiency of the electromechanical conversion element 50 is maintained. Moreover, the two light shielding members of the first light shielding member 3 and the second light shielding member 4 can be alternately rotated by one electro-mechanical conversion element 50, and the light quantity control in three stages is efficiently performed. be able to. Further, the guide portion can reliably perform the entry / retraction rotation of the first light shielding member 3 and the second light shielding member 4. Further, the stopper can reliably make the axial centers of the light quantity control holes 33 and 43 of the first light shielding member 3 and the second light shielding member 4 concentric with the axis of the opening 2. 3 and the second light-shielding member 4 can be reliably retained.

なお、本実施例の光量制御装置Aは、前記遮光部材駆動部5の左右方向への移動を第1遮光部材駆動伝達部6および第2遮光部材駆動伝達部7によって、第1遮光部材3および第2遮光部材4を回動させて開口2に対して進入退避させる構成としたものであるが、本発明では、前記構成に限られず、前記遮光部材駆動部5の左右方向への移動を第1遮光部材駆動伝達部6および第2遮光部材駆動伝達部7によって、第1遮光部材3および第2遮光部材4を左右移動させて開口2に対して進入退避させる構成としてもよい(図示せず)。   In the light amount control device A of the present embodiment, the first light shielding member 3 and the second light shielding member drive transmission unit 7 move the light shielding member drive unit 5 in the left-right direction by the first light shielding member drive transmission unit 6 and the second light shielding member drive transmission unit 7. The second light shielding member 4 is rotated and moved into and out of the opening 2. However, the present invention is not limited to the above configuration, and the movement of the light shielding member driving unit 5 in the left-right direction is the first. The first light-shielding member drive transmission unit 6 and the second light-shielding member drive transmission unit 7 may be configured to move the first light-shielding member 3 and the second light-shielding member 4 left and right to enter and retract from the opening 2 (not shown). ).

次に、第2実施例の光量制御装置を図10、図11に基づいて説明する。本実施例の光量制御装置Bの基本的な構成は、第1実施例の光量制御装置Aと同様に、1個の電気−機械変換素子50の伸縮による駆動力で、第1遮光部材3および第2遮光部材4の2個の遮光部材を交互に回動させるようにしたものである。なお、以下の説明では、図10中の右上ないし左下方向を上下方向とする。   Next, the light quantity control device of the second embodiment will be described with reference to FIGS. The basic configuration of the light quantity control device B of this embodiment is the same as that of the light quantity control device A of the first embodiment, with the driving force generated by the expansion / contraction of one electro-mechanical conversion element 50, and the first light shielding member 3 and The two light shielding members of the second light shielding member 4 are alternately rotated. In the following description, the upper right or lower left direction in FIG.

本実施例の光量制御装置Bは、図10、図11に示すように、保持部材1と、該保持部材1に設けられた開口2内に対して進入退避するように回動する2個の第1遮光部材3および第2遮光部材4と、図10において円弧に沿って時計回り、および反時計回りに移動することにより、前記第1遮光部材3および第2遮光部材4を回動させる駆動力を発生する遮光部材駆動部5と、該遮光部材駆動部5の駆動力を前記第1遮光部材3および第2遮光部材4に対して、図10において遮光部材駆動部5の移動軌跡の円弧の中心を回動中心として回動可能に軸支し、該回動によって伝達して、該第1遮光部材3および第2遮光部材4を回動させる第1遮光部材駆動伝達部6および第2遮光部材駆動伝達部7と、該第1遮光部材駆動伝達部6および第2遮光部材駆動伝達部7に対して、第1遮光部材3および第2遮光部材4を前記開口2内から退避させる付勢力を与える弾性部材8とを備えている。   As shown in FIGS. 10 and 11, the light quantity control device B of the present embodiment has two holding members 1 and two pieces that rotate so as to enter and retreat into the openings 2 provided in the holding members 1. The first light-shielding member 3 and the second light-shielding member 4 and a drive for rotating the first light-shielding member 3 and the second light-shielding member 4 by moving clockwise and counterclockwise along the arc in FIG. The light shielding member driving unit 5 that generates force, and the driving force of the light shielding member driving unit 5 with respect to the first light shielding member 3 and the second light shielding member 4 in FIG. The first light-shielding member drive transmission unit 6 and the second light-shielding member drive transmission unit 6 and the second light-shielding member 4 are pivotally supported about the center of rotation and transmitted by the rotation to rotate the first light-shielding member 3 and the second light-shielding member 4. The light shielding member drive transmission unit 7, the first light shielding member drive transmission unit 6 and the first light shielding member drive transmission unit 6; Against the light shielding member driving force transmitting unit 7, the first light-shielding member 3 and the second light shielding member 4 and an elastic member 8 to provide a biasing force for retracting from the opening within 2.

保持部材1は、平面視正方形状の保持板10と、該保持板10と平面視同一の正方形状とするとともに、厚み方向で重なり合う蓋状体11とで構成してある。前記保持板10には、図11において上側の角部に平面視三角形状の突起体10Iを、下側の角部に平面視L字形状の突起体10Jを突設し、両突起体10I、10Jで前記重なり合う蓋状体11を支持するとともに、前記第1遮光部材3および第2遮光部材4を収納し、かつ回動させるための動作空間Sを確保している。   The holding member 1 includes a holding plate 10 having a square shape in plan view and a lid-like body 11 having the same square shape as the holding plate 10 in plan view and overlapping in the thickness direction. In FIG. 11, the holding plate 10 is provided with a projection 10I having a triangular shape in plan view at the upper corner portion and a projection 10J having an L shape in plan view at the lower corner portion. 10J supports the overlapping lid 11 and secures an operation space S for housing and rotating the first light shielding member 3 and the second light shielding member 4.

前記保持板10は、図10に示すように、前記開口2の一部を構成する穴部20、前記遮光部材駆動部5、前記第1遮光部材駆動伝達部6および第2遮光部材駆動伝達部7、前記弾性部材8を配置してある。また、前記保持板10には、前記第1遮光部材駆動伝達部6の回動を案内する円弧状の長穴部10Kと、前記第2遮光部材駆動伝達部7の回動を案内する円弧状の長穴部10Lとを形成してある。前記長穴部10Kには、前記第1遮光部材駆動伝達部6に突設したボス部60が、長穴部Kの円弧に案内されながら移動可能に嵌合し、前記長穴部10Lには、前記第2遮光部材駆動伝達部7に突設したボス部70が、長穴部10Lの円弧に案内されながら移動可能に嵌合する。前記長穴部10K、10Lの円弧は、前記遮光部材駆動部5の円弧と同心とする円弧である。   As shown in FIG. 10, the holding plate 10 includes a hole 20 that constitutes a part of the opening 2, the light shielding member drive unit 5, the first light shielding member drive transmission unit 6, and the second light shielding member drive transmission unit. 7. The elastic member 8 is disposed. The holding plate 10 has an arcuate slot 10K for guiding the rotation of the first light shielding member drive transmission unit 6 and an arc shape for guiding the rotation of the second light shielding member drive transmission unit 7. The long hole portion 10L is formed. A boss portion 60 projecting from the first light shielding member drive transmission portion 6 is fitted into the elongated hole portion 10K so as to be movable while being guided by an arc of the elongated hole portion K. The boss portion 70 protruding from the second light shielding member drive transmission portion 7 is movably fitted while being guided by the arc of the long hole portion 10L. The arcs of the long hole portions 10 </ b> K and 10 </ b> L are arcs that are concentric with the arc of the light shielding member driving unit 5.

前記蓋状体11は、前記動作空間S内の前記第1遮光部材3、および第2遮光部材4を保持するものである。蓋状体11は、その中央に前記開口2の一部を構成し、前記穴部20と同軸とする穴部21を形成してある。そして、前記構成の保持板10と蓋状体11を、前記突起体10I、10Jで蓋状体11を支えるように重ね合わせ、ねじ等(不図示)により固着することにより、該保持板10と蓋状体11の間に前記動作空間Sが形成された保持部材1となる。また、同様に、保持部材1の四方に前記動作空間Sと連通するスリットS6〜S9が形成され、該スリットS6〜S9は、第1遮光部材3、および第2遮光部材4がその回動位置によっては突出可能なものである。   The lid 11 holds the first light shielding member 3 and the second light shielding member 4 in the operation space S. The lid-like body 11 forms a part of the opening 2 at the center thereof and has a hole 21 that is coaxial with the hole 20. Then, the holding plate 10 and the lid-like body 11 having the above-described configuration are overlapped so as to support the lid-like body 11 by the protrusions 10I and 10J, and are fixed by screws or the like (not shown). It becomes the holding member 1 in which the operation space S is formed between the lids 11. Similarly, slits S6 to S9 communicating with the operation space S are formed in the four directions of the holding member 1, and the first light shielding member 3 and the second light shielding member 4 are rotated positions of the slits S6 to S9. Some can protrude.

前記開口2は、光量を制御するための光量制御穴であり、図11に示すように、前記動作空間Sで回動する前記第1遮光部材3、および第2遮光部材4が進入退避することにより、口径が変化するようにしてある。   The opening 2 is a light amount control hole for controlling the light amount, and as shown in FIG. 11, the first light shielding member 3 and the second light shielding member 4 rotating in the operation space S enter and retreat. Therefore, the aperture is changed.

前記第1遮光部材3は、図11に示すように、動作空間Sの図11において右側端部付近側を、該第1遮光部材3の回動中心となる支軸103により、時計回り、および反時計回りに回動可能に軸支されている。前記第2遮光部材4は、図11に示すように、動作空間Sの図11において左側端部付近を、第2遮光部材4の回動中心となる支軸104により、時計回り、および反時計回りに回動可能に軸支されている。また、前記第1遮光部材3には、前記長穴部10Kの円弧方向と交差する方向に長穴部34を形成してあり、前記第2遮光部材4には、前記長穴部10Lの円弧方向と交差する方向に長穴部44を形成してある。前記長穴部34には、前記ボス部60が長穴に沿って移動可能に貫通し、前記長穴部44には、前記ボス部70が長穴に沿って移動可能に貫通している。   As shown in FIG. 11, the first light shielding member 3 is rotated clockwise around the right end in FIG. 11 of the operation space S by a support shaft 103 which is the rotation center of the first light shielding member 3. It is pivotally supported so that it can rotate counterclockwise. As shown in FIG. 11, the second light shielding member 4 is rotated clockwise and counterclockwise around the left end portion in FIG. 11 of the operation space S by the support shaft 104 that is the rotation center of the second light shielding member 4. It is pivotally supported so that it can rotate around. Further, the first light shielding member 3 is formed with a long hole portion 34 in a direction intersecting with the circular arc direction of the long hole portion 10K, and the second light shielding member 4 has a circular arc of the long hole portion 10L. A slot 44 is formed in a direction crossing the direction. The boss portion 60 penetrates the elongated hole portion 34 so as to be movable along the elongated hole, and the boss portion 70 penetrates the elongated hole portion 44 so as to be movable along the elongated hole.

前記第1遮光部材3および第2遮光部材4は、図11に示すように、保持板10の対角線上で互いに重なり合うように軸支され、該重なり合う部分に前記開口2から退避している状態において、該開口2を除けるように平面視半円状に形成した切欠部35、45を有している。   As shown in FIG. 11, the first light shielding member 3 and the second light shielding member 4 are pivotally supported so as to overlap each other on the diagonal line of the holding plate 10, and are retracted from the opening 2 to the overlapping portion. The cutout portions 35 and 45 are formed in a semicircular shape in plan view so as to remove the opening 2.

前記第1遮光部材3の切欠部35の図11において上方には、前記開口2の口径よりも小径な光量制御穴33を形成してあり、前記第2遮光部材4の切欠部45の図11において上方には、前記光量制御穴33の口径よりも小径な光量制御穴43を形成してある。   A light amount control hole 33 having a diameter smaller than the diameter of the opening 2 is formed above the notch 35 of the first light shielding member 3 in FIG. 11, and FIG. 11 of the notch 45 of the second light shielding member 4 is formed. In the upper part, a light amount control hole 43 having a diameter smaller than the diameter of the light amount control hole 33 is formed.

そして、図11に示すように、前記第1遮光部材3と第2遮光部材4が、前記支軸103、104を回動中心として交互に時計回り、および反時計回りに回動して前記開口2に対して進入退避することにより、該開口2の口径を大,中,小の3段階に調節することができる。この開口2の口径は、前記第1遮光部材3と第2遮光部材4の双方が開口2から退避している状態が大口径、前記第1遮光部材3が開口2に進入している状態が中口径、前記第2遮光部材4が開口2に進入している状態が小口径(仮想線で示す)となる。   Then, as shown in FIG. 11, the first light shielding member 3 and the second light shielding member 4 are alternately rotated clockwise and counterclockwise around the support shafts 103 and 104 as the rotation centers. By entering and retreating with respect to 2, the diameter of the opening 2 can be adjusted in three stages of large, medium and small. The aperture 2 has a large aperture when both the first light-shielding member 3 and the second light-shielding member 4 are retracted from the aperture 2, and a state where the first light-shielding member 3 enters the aperture 2. A state where the medium diameter and the second light shielding member 4 enter the opening 2 is a small diameter (indicated by a virtual line).

前記遮光部材駆動部5は、図10,図11に示すように、制御電圧を印加され伸縮する駆動部品である圧電素子等の電気−機械変換素子50と、該電気−機械変換素子50の図10において時計回り側の面に固着した駆動部材51と、前記圧電素子等の電気−機械変換素子50の図10において反時計回り側の面に固着した押付部材52と、前記駆動部材51を係合保持する摩擦係合部材53とで構成してある。また、遮光部材駆動部5は、前記保持板10上に載置されるように固着してある。   As shown in FIGS. 10 and 11, the light-shielding member driving unit 5 includes an electro-mechanical conversion element 50 such as a piezoelectric element that is a drive component that is expanded and contracted by applying a control voltage, and a diagram of the electro-mechanical conversion element 50. 10, the driving member 51 fixed to the clockwise surface, the pressing member 52 fixed to the counterclockwise surface in FIG. 10 of the electromechanical transducer 50 such as the piezoelectric element, and the driving member 51. It is comprised with the friction engagement member 53 to hold together. The light shielding member driving unit 5 is fixed so as to be placed on the holding plate 10.

前記駆動部材51は、前記第1実施例と同様の比重が小さい強靭な材料より、断面円形の棒状体を円弧状に曲げて形成してある。また、駆動部材51の時計回り方向の端部が、前記第1遮光部材駆動伝達部6に接触して、該第1遮光部材駆動伝達部6を同方向に押し動かすように回動させる押付部511として使用される。なお、前記駆動部材51は、回転軸の機能を必要としない構成要素であるから断面角形状の棒状体を円弧状に曲げた形状に形成した構成でもよい。   The drive member 51 is formed by bending a rod-shaped body having a circular cross section into an arc shape from a tough material having a small specific gravity as in the first embodiment. Further, a pressing portion that rotates the end portion of the driving member 51 in the clockwise direction to come into contact with the first light shielding member drive transmission portion 6 to push and move the first light shielding member drive transmission portion 6 in the same direction. 511 is used. Since the drive member 51 is a component that does not require the function of the rotating shaft, the drive member 51 may have a configuration in which a rod-like body having an angular cross section is bent into an arc shape.

押付部材52は、前記第1実施例と同様に被駆動ヘッドを兼用するものであり、大きな静止慣性力を必要とするために、前記駆動部材51と比較して比重の大きい材料により、平面視扇状に形成してある。該押付部材52は、前記電気−機械変換素子50に固着する固着部523と、前記第2遮光部材駆動伝達部7に接触する押付部524とから構成してある。   The pressing member 52 is also used as a driven head as in the first embodiment. Since the pressing member 52 requires a large static inertia force, the pressing member 52 is made of a material having a higher specific gravity than the driving member 51 in plan view. It is formed in a fan shape. The pressing member 52 includes a fixing portion 523 that is fixed to the electromechanical conversion element 50 and a pressing portion 524 that is in contact with the second light shielding member drive transmission portion 7.

前記押付部511は、前記電気−機械変換素子50の円弧方向の伸縮に伴って該円弧に沿って移動し、図10に示すように、時計回りに沿う移動で、前記第1遮光部材駆動伝達部6に接触して、該第1遮光部材駆動伝達部6を同方向に押し動かすように回動させる(図10において仮想線で示す)。この第1遮光部材駆動伝達部6の反時計回りの回動は、前記第1遮光部材3を開口2に対して進入させる方向の回動である。   The pressing portion 511 moves along the arc as the electro-mechanical conversion element 50 expands and contracts in the arc direction. As shown in FIG. The first light-shielding member drive transmission unit 6 is rotated so as to be pushed in the same direction in contact with the unit 6 (indicated by an imaginary line in FIG. 10). The counterclockwise rotation of the first light shielding member drive transmission unit 6 is rotation in a direction in which the first light shielding member 3 enters the opening 2.

前記押付部524は、前記電気−機械変換素子50の円弧方向の伸縮に伴って該円弧に沿って移動し、図10に示すように、反時計回りに沿う移動で、前記第2遮光部材駆動伝達部7に接触して、該第2遮光部材駆動伝達部7を同方向に押し動かすように回動させる(図10において仮想線で示す)。この第2遮光部材駆動伝達部7の反時計回りの回動は、前記第2遮光部材4を開口2に対して進入させる方向の回動である。   The pressing portion 524 moves along the arc as the electromechanical conversion element 50 expands and contracts in the arc direction, and as shown in FIG. 10, the second light shielding member is driven by moving counterclockwise. The second light-shielding member drive transmission unit 7 is rotated so as to be in contact with the transmission unit 7 and pushed in the same direction (indicated by an imaginary line in FIG. 10). The counterclockwise rotation of the second light shielding member drive transmission portion 7 is rotation in a direction in which the second light shielding member 4 enters the opening 2.

摩擦係合部材53は、前記駆動部材51を下側から保持する固定係合部材53Cと、前記駆動部材51を上側から保持する摩擦ばね部材53Dとから構成してある。   The friction engagement member 53 includes a fixed engagement member 53C that holds the drive member 51 from the lower side, and a friction spring member 53D that holds the drive member 51 from the upper side.

前記固定係合部材53Cは、図10に示すように、前記駆動部材51がその円弧に沿って案内可能に嵌入する凹形状の摩擦保持面534を有する平面視伸縮方向に沿う円弧を有する扇状に形成してある。   As shown in FIG. 10, the fixed engagement member 53 </ b> C has a fan-like shape having an arc extending along the expansion / contraction direction in plan view, which has a concave friction holding surface 534 into which the drive member 51 can be guided along the arc. It is formed.

摩擦ばね部材53Dは、前記駆動部材51を厚み方向の上側から押さえる摩擦ばね面535と、該摩擦ばね面535と一体であり、前記突起体10Jに正対して係合する係合保持面536とから構成してあり、該摩擦ばね面535と係合保持面536とで、上下方向から前記駆動部材51と固定係合部材5Cと保持板10と挟持するようにしている。そして、この摩擦ばね面535と係合保持面536とで挟持することにより、遮光部材駆動部5を保持板10に取り付けることができる。   The friction spring member 53D includes a friction spring surface 535 that presses the drive member 51 from the upper side in the thickness direction, and an engagement holding surface 536 that is integral with the friction spring surface 535 and engages the protrusion 10J in a face-to-face relationship. The friction spring surface 535 and the engagement holding surface 536 sandwich the drive member 51, the fixed engagement member 5C, and the holding plate 10 from above and below. The light shielding member driving unit 5 can be attached to the holding plate 10 by being sandwiched between the friction spring surface 535 and the engagement holding surface 536.

そして、前記駆動部材51を摩擦保持面534に嵌入するとともに、前記摩擦ばね部材53Dを前記駆動部材51に載置した状態で、前記固定係合部材5Cを保持板10上に位置させて、前記係合保持面536を前記突起体10Jに正対して係合することにより、前記遮光部材駆動部5を保持部材1に取り付けることができる。したがって、前記遮光部材駆動部5の保持部材1に対する取り付けを迅速、かつ容易に行うことができる。   The drive member 51 is fitted into the friction holding surface 534, and the fixed engagement member 5C is positioned on the holding plate 10 in a state where the friction spring member 53D is placed on the drive member 51. The light-shielding member driving unit 5 can be attached to the holding member 1 by engaging the engagement holding surface 536 with the protrusion 10J. Therefore, the light shielding member driving unit 5 can be quickly and easily attached to the holding member 1.

前記第1遮光部材駆動伝達部6は、図10に示すように、図10において右側の角部付近で、支軸63により時計回り、および反時計回りに回動可能に軸支された軸支部64と、前記駆動部材51の押付部511が接触する当接突起65と、該当接突起65の厚み方向下側に突設した前記ボス部60と、前記軸支部64と当接突起65を連結する連結部66とから形成してある。   As shown in FIG. 10, the first light shielding member drive transmission portion 6 is a shaft support portion that is pivotally supported by the support shaft 63 so as to be rotatable clockwise and counterclockwise in the vicinity of the right corner in FIG. 64, the abutting projection 65 that contacts the pressing portion 511 of the driving member 51, the boss portion 60 projecting on the lower side in the thickness direction of the corresponding abutting projection 65, and the shaft support portion 64 and the abutting projection 65 are connected. The connecting part 66 is formed.

前記第2遮光部材駆動伝達部7は、図10に示すように、前記軸支部64と同軸で重なるとともに、前記支軸63により時計回り、および反時計回りに回動可能に軸支された軸支部73と、前記押付部材52の押付部524が接触する当接突起74と、該当接突起74の厚み方向下側に突設した前記ボス部70と、前記軸支部73と当接突起74を連結する連結部75とから形成してある。   As shown in FIG. 10, the second light-shielding member drive transmission portion 7 is coaxially overlapped with the shaft support portion 64 and is pivotally supported by the support shaft 63 so as to be rotatable clockwise and counterclockwise. The support 73, the contact protrusion 74 with which the pressing part 524 of the pressing member 52 contacts, the boss part 70 protruding below the contact protrusion 74 in the thickness direction, the shaft support 73 and the contact protrusion 74 are provided. It forms from the connection part 75 connected.

すなわち、前記第1遮光部材駆動伝達部6は、前記押付部511の時計回りに沿う移動により、前記当接突起65が押し動かされることにより、前記軸支部65が支軸63を回動中心として時計回りに回動する。このとき、前記第1遮光部材駆動伝達部6は、前記ボス部60が長穴部10Kの端縁に接触することにより時計回りの回動が規制されている。また、前記第1遮光部材駆動伝達部7は、前記押付部524の反時計回りに沿う移動により、前記当接突起74が押し動かされることにより、前記軸支部73が支軸63を回動中心として反時計回りに回動する。このとき、前記第2遮光部材駆動伝達部7は、前記ボス部70が長穴部10Lの端部に接触することにより反時計回りの回動が規制されている。   That is, the first light-shielding member drive transmission unit 6 moves the pressing portion 511 in the clockwise direction so that the abutting projection 65 is pushed and moved, so that the shaft support portion 65 has the support shaft 63 as a rotation center. Rotate clockwise. At this time, the first light-shielding member drive transmission portion 6 is restricted from rotating clockwise by the boss portion 60 coming into contact with the edge of the long hole portion 10K. In addition, the first light shielding member drive transmission portion 7 is configured such that the shaft support portion 73 rotates about the support shaft 63 when the contact protrusion 74 is pushed and moved by the counterclockwise movement of the pressing portion 524. As counterclockwise. At this time, the second light-shielding member drive transmission portion 7 is restricted from rotating counterclockwise by the boss portion 70 coming into contact with the end portion of the elongated hole portion 10L.

本実施例の弾性部材8は、引っ張ることにより伸長して付勢力が発生する引っ張りばねである。該弾性部材8は、前記第1遮光部材駆動伝達部6に設けられた掛止部67と第2遮光部材駆動伝達部7に設けられた掛止部76とに亘って、第1遮光部材駆動伝達部6の時計回りの回動、および第2遮光部材駆動伝達部の反時計回りの回動に伴って伸長するように掛け渡してある。   The elastic member 8 of the present embodiment is a tension spring that expands when pulled and generates a biasing force. The elastic member 8 drives the first light shielding member across the latching portion 67 provided in the first light shielding member drive transmission portion 6 and the latching portion 76 provided in the second light shielding member drive transmission portion 7. It is stretched so as to extend along with the clockwise rotation of the transmission unit 6 and the counterclockwise rotation of the second light shielding member drive transmission unit.

すなわち、前記弾性部材8は、前記第1遮光部材駆動伝達部6が時計回り(第1遮光部材3が開口2に進入する方向)に回動することにより、該第1遮光部材駆動伝達部6に対して反時計回り(第1遮光部材3が開口2から退避する方向)に回動させる付勢力を与え、前記第2遮光部材駆動伝達部7が反時計回り(第2遮光部材4が開口2に進入する方向)に回動することにより、該第2遮光部材駆動伝達部7に対して時計回り(第2遮光部材4が開口2から退避する方向)に回動させる付勢力を与える。   That is, the elastic member 8 is configured such that the first light shielding member drive transmission portion 6 is rotated by the first light shielding member drive transmission portion 6 rotating clockwise (the direction in which the first light shielding member 3 enters the opening 2). A biasing force for rotating counterclockwise (the direction in which the first light shielding member 3 retracts from the opening 2) is applied, and the second light shielding member drive transmission portion 7 rotates counterclockwise (the second light shielding member 4 opens). 2 is applied to the second light-shielding member drive transmission unit 7 in a clockwise direction (a direction in which the second light-shielding member 4 is retracted from the opening 2).

なお、本発明の弾性部材は、前記実施例に示した弾性部材8に限られず、前記第1遮光部材駆動伝達部6、および第2遮光部材駆動伝達部7に対して、前記した付勢力を作用させる構成を備えたものであればよい。また、前記実施例では、弾性部材8の付勢力を前記第1遮光部材駆動伝達部6、および第2遮光部材駆動伝達部7に対して作用させる構成を示したが、本発明では、たとえば、前記第1遮光部材3、および第2遮光部材4に直接付勢力を作用させる構成にしてもよい(図示せず)。   The elastic member of the present invention is not limited to the elastic member 8 shown in the above-described embodiment, and the urging force described above is applied to the first light shielding member drive transmission unit 6 and the second light shielding member drive transmission unit 7. What is necessary is just to have the structure made to act. Moreover, in the said Example, although the structure which makes the urging | biasing force of the elastic member 8 act with respect to the said 1st light-shielding member drive transmission part 6 and the 2nd light-shielding member drive transmission part 7 was shown, in this invention, for example, An urging force may be directly applied to the first light shielding member 3 and the second light shielding member 4 (not shown).

本実施例では、前記長穴部34が、前記第1遮光部材3の回動をガイドするガイド部として機能し、前記長穴部44が、前記第2遮光部材4の回動をガイドするガイド部として機能している。   In this embodiment, the elongated hole portion 34 functions as a guide portion that guides the rotation of the first light shielding member 3, and the elongated hole portion 44 guides the rotation of the second light shielding member 4. It functions as a department.

すなわち、前記第1遮光部材駆動伝達部6、および第2遮光部材駆動伝達部7の回動に伴って、前記ボス部60、70が長穴部10K、10Lに沿って移動することで、前記第1遮光部材3、第2遮光部材4を、前記支軸103、104を回動中心に、時計回り、および反時計回りに回動させる。このとき、前記ボス部60、70の長穴部10K、10Lに沿う移動による変位を、該ボス部60、70に対して前記長穴部34、44が移動することにより吸収しながら、第1遮光部材3、第2遮光部材4の回動をガイドすることになる。   That is, as the first light shielding member drive transmission unit 6 and the second light shielding member drive transmission unit 7 rotate, the boss portions 60 and 70 move along the long hole portions 10K and 10L, The first light shielding member 3 and the second light shielding member 4 are rotated clockwise and counterclockwise around the support shafts 103 and 104 as the rotation center. At this time, while the displacement of the boss portions 60, 70 due to the movement along the long hole portions 10K, 10L is absorbed by the movement of the long hole portions 34, 44 relative to the boss portions 60, 70, the first The rotation of the light shielding member 3 and the second light shielding member 4 is guided.

本実施例では、前記長穴部10Kが、前記第1遮光部材駆動伝達部6の回動範囲を規制するストッパーとして機能し、前記第1遮光部材3の進入退避方向の回動を規制している。そして、前記長穴部10Lが、前記第2遮光部材駆動伝達部7の回動範囲を規制するストッパーとして機能し、前記第2遮光部材の4の進入退避方向の回動を規制している。   In the present embodiment, the elongated hole portion 10K functions as a stopper that restricts the rotation range of the first light shielding member drive transmission portion 6, and restricts the rotation of the first light shielding member 3 in the entering and retracting direction. Yes. The elongated hole portion 10L functions as a stopper for restricting the rotation range of the second light shielding member drive transmission portion 7, and restricts the rotation of the second light shielding member 4 in the entry and retraction direction.

第1遮光部材駆動伝達部6、および第2遮光部材駆動伝達部7の回動範囲を規制するストッパーは、前記ボス部60、70が互いに、前記第1遮光部材3、および第2遮光部材4を進入退避方向へ回動させる方向に移動し、前記長穴部10K、および長穴部10Lの端縁に接触することにより、該ボス部60、70のこれ以上の移動を阻止するようにした構成である。   The stoppers for restricting the rotation ranges of the first light shielding member drive transmission unit 6 and the second light shielding member drive transmission unit 7 are such that the boss portions 60 and 70 are mutually connected to the first light shielding member 3 and the second light shielding member 4. Is moved in the direction of turning in the retracting direction, and the boss portions 60 and 70 are prevented from further movement by contacting the edge of the elongated hole portion 10K and the elongated hole portion 10L. It is a configuration.

前記長穴部10Kの長さは、前記ボス部60が前記第1遮光部材3を進入させる方向の長穴部10Kの端縁に接触したとき、前記第1遮光部材3の光量制御穴33の軸心が前記開口2の軸心と同心となり、前記ボス部60が前記第1遮光部材3を退避させる方向の長穴部10Kの端縁に接触したとき、前記第1遮光部材3が開口2と重ならず、かつ前記動作空間Sに位置する長さである。   The length of the long hole portion 10K is such that the light amount control hole 33 of the first light shielding member 3 has a length when the boss portion 60 comes into contact with the edge of the long hole portion 10K in the direction in which the first light shielding member 3 enters. When the axial center is concentric with the axial center of the opening 2 and the boss portion 60 comes into contact with the edge of the elongated hole portion 10K in the direction in which the first light shielding member 3 is retracted, the first light shielding member 3 is opened. And a length located in the operation space S.

また、前記長穴部10Lの長さも同様に、前記ボス部70が第2遮光部材4を進入させる方向へ移動して、前記長穴部10Lの端縁に接触したとき、前記第2遮光部材4の光量制御穴43の軸心が前記開口2の軸心と同心となり、前記ボス部70が前記第2遮光部材4を退避させる方向の長穴部10Lの端縁に接触したとき、前記第2遮光部材4が開口2と重ならず、かつ前記動作空間Sに位置する長さである。   Similarly, the length of the long hole portion 10L moves in the direction in which the boss portion 70 enters the second light shielding member 4 and comes into contact with the edge of the long hole portion 10L. When the axial center of the light quantity control hole 43 is concentric with the axial center of the opening 2 and the boss portion 70 contacts the edge of the elongated hole portion 10L in the direction in which the second light shielding member 4 is retracted, 2 The length is such that the light shielding member 4 does not overlap the opening 2 and is located in the operation space S.

なお、前記突起体10Iは、図11に示すように、前記第1遮光部材3および第2遮光部材4の前記開口2から退避する方向の回動範囲を規制するストッパーとして機能させてもよく、前記突起体10Jは、図11に示すように、前記第1遮光部材3および第2遮光部材4の前記開口2に進入する方向の回動範囲を規制するストッパーとして機能させてもよい(仮想線で示す)。   As shown in FIG. 11, the protrusion 10I may function as a stopper that regulates the rotation range of the first light shielding member 3 and the second light shielding member 4 in the direction of retreating from the opening 2, As shown in FIG. 11, the protrusion 10J may function as a stopper for restricting the rotation range of the first light shielding member 3 and the second light shielding member 4 in the direction of entering the opening 2 (imaginary line). ).

以下、前記構成の光量制御装置Bの動作を説明すると、本実施例においても、第1実施例と同様に、大口径状態(初期状態)、中口径状態、小口径状態にそれぞれ切り替えるようにしたものである。   Hereinafter, the operation of the light quantity control device B having the above-described configuration will be described. In this embodiment, as in the first embodiment, the large-aperture state (initial state), the medium-aperture state, and the small-aperture state are respectively switched. Is.

前記大口径状態では、前記押付部511、524が第1遮光部材駆動伝達部6および第2遮光部材駆動伝達部7を押し動かしていない状態である。また、この状態では、前記第1遮光部材3が前記第1遮光部材駆動伝達部6および弾性部材8により、前記第2遮光部材4が前記第2遮光部材駆動伝達部7および弾性部材8により、前記開口2から退避している状態を保持している。また、前記第1遮光部材および第2遮光部材4は、前記構成のストッパーにより回動が規制され、前記第1遮光部材駆動伝達部6および第2遮光部材駆動伝達部7は、前記構成のストッパーにより回動が規制されている。   In the large-diameter state, the pressing portions 511 and 524 do not push the first light shielding member drive transmission unit 6 and the second light shielding member drive transmission unit 7. Further, in this state, the first light shielding member 3 is caused by the first light shielding member drive transmission portion 6 and the elastic member 8, and the second light shielding member 4 is caused by the second light shielding member drive transmission portion 7 and the elastic member 8. A state of being retracted from the opening 2 is maintained. The first light-shielding member and the second light-shielding member 4 are restricted from rotating by the stopper configured as described above, and the first light-shielding member drive transmission unit 6 and the second light-shielding member drive transmission unit 7 are configured as the stopper. The rotation is regulated by

前記大口径状態から中口径状態にする場合、制御電圧を印加して前記電気−機械変換素子50を時計回り(以下、図10に示された状態での回転方向を基準に説明する。)に移動(急速伸長及び緩速収縮)させる。このとき、電気−機械変換素子50の時計回りに移動に伴って移動する前記押付突起511が、前記第1遮光部材駆動伝達部6を時計回りに押し動かして回動させる。この前記第1遮光部材駆動伝達部6の回動と同時に、前記ボス部60が長穴部10Kを時計回りに移動し、前記構成のガイド部を介して、第1遮光部材3を開口2へ進入する方向に回動させる。開口2に進入した第1遮光部材3は、前記構成のストッパーにより、光量制御穴33の軸心と開口2の軸心とが同心になる位置で保持される。また、このとき、前記第1遮光部材駆動伝達部6には、時計回りへの回動に伴って伸長する前記弾性部材8の弾性変形により、第1遮光部材3を開口2から退避させる方向(反時計回り)への付勢力が作用している。   When changing from the large-diameter state to the medium-diameter state, a control voltage is applied to rotate the electro-mechanical conversion element 50 in the clockwise direction (hereinafter described based on the rotation direction in the state shown in FIG. 10). Move (rapid extension and slow contraction). At this time, the pressing protrusion 511 that moves in accordance with the clockwise movement of the electromechanical conversion element 50 pushes and rotates the first light shielding member drive transmission unit 6 clockwise. Simultaneously with the rotation of the first light shielding member drive transmission portion 6, the boss portion 60 moves clockwise through the long hole portion 10K, and the first light shielding member 3 is moved to the opening 2 through the guide portion having the above-described configuration. Turn in the direction of entry. The first light shielding member 3 that has entered the opening 2 is held at a position where the axis of the light quantity control hole 33 and the axis of the opening 2 are concentric by the stopper configured as described above. At this time, the first light-shielding member drive transmission portion 6 is caused to retract the first light-shielding member 3 from the opening 2 due to elastic deformation of the elastic member 8 that is extended with clockwise rotation ( A counterclockwise biasing force is acting.

前記中口径状態から小口径状態にする場合、制御電圧を印加して前記電気−機械変換素子50を反時計回りに移動(緩速伸長及び急速収縮)させる。このとき、電気−機械変換素子50の反時計回りの移動に伴って移動する前記押付突起524が、前記第2遮光部材駆動伝達部7を反時計回りに押し動かして回動させる。この前記第2遮光部材駆動伝達部7の回動と同時に、前記ボス部70が長穴部10Lを反時計回りに移動し、前記構成のガイド部を介して、第2遮光部材4を開口2へ進入する方向に回動させる。開口2に進入した第2遮光部材4は、前記構成のストッパーにより、光量制御穴33の軸心と開口2の軸心とが同心になる位置で保持される。また、このとき、前記第2遮光部材駆動伝達部7には、反時計回りへの回動に伴って伸長する前記弾性部材8の弾性変形により、第2遮光部材4を開口2から退避させる方向(時計回り)への付勢力が作用している。   When changing from the medium diameter state to the small diameter state, a control voltage is applied to move the electromechanical conversion element 50 counterclockwise (slow expansion and rapid contraction). At this time, the pressing protrusion 524 that moves in accordance with the counterclockwise movement of the electromechanical conversion element 50 pushes and rotates the second light shielding member drive transmission unit 7 counterclockwise. Simultaneously with the rotation of the second light shielding member drive transmission portion 7, the boss portion 70 moves counterclockwise through the elongated hole portion 10L, and the second light shielding member 4 is opened 2 through the guide portion having the above-described configuration. Rotate in the direction to enter. The second light-shielding member 4 that has entered the opening 2 is held at a position where the axis of the light quantity control hole 33 and the axis of the opening 2 are concentric by the stopper configured as described above. At this time, the second light-shielding member drive transmission unit 7 is caused to retract the second light-shielding member 4 from the opening 2 due to elastic deformation of the elastic member 8 that expands in accordance with the counterclockwise rotation. The urging force (clockwise) is acting.

前記中口径状態から小口径状態にする動作では、前記第2遮光部材駆動伝達部7の反時計回りの回動と同時に、前記第1遮光部材駆動伝達部6が前記付勢力により反時計回りに回動するとともに、前記ボス部60が前記長穴部10Kを反時計回りに移動して、前記構成のガイド部を介して第1遮光部材3を開口2から退避する方向へ回動させる。   In the operation of changing from the medium diameter state to the small diameter state, the first light shielding member drive transmission unit 6 is rotated counterclockwise by the biasing force simultaneously with the counterclockwise rotation of the second light shielding member drive transmission unit 7. While rotating, the boss 60 moves the elongated hole portion 10K counterclockwise to rotate the first light shielding member 3 in the direction of retreating from the opening 2 through the guide portion having the above configuration.

前記第2実施例の光量制御装置Bによれば、電気−機械変換素子50の出力効率を保持した上で、光量制御装置Aの小型化およびコストの低減を図ることができる。しかも、1個の電気−機械変換素子50で、第1遮光部材3および第2遮光部材4の2個の遮光部材を交互に回動させることができ、効率的に3段階の光量制御を行うことができる。さらに、前記ガイド部によって第1遮光部材3および第2遮光部材4の進入退避の回動を確実に行うことができる。さらに、前記ストッパーによって、前記第1遮光部材3および第2遮光部材4の光量制御穴33、43の軸心を開口2の軸心と確実に同心状態にすることができ、該第1遮光部材3および第2遮光部材4の退避状態を確実に保持することができる。さらに、電気−機械変換素子50の伸縮を円弧に沿って行うようにしたので、光量制御装置Aをより小型化することができる。   According to the light amount control device B of the second embodiment, the light amount control device A can be reduced in size and cost while the output efficiency of the electromechanical conversion element 50 is maintained. Moreover, the two light shielding members of the first light shielding member 3 and the second light shielding member 4 can be alternately rotated by one electro-mechanical conversion element 50, and the light quantity control in three stages is efficiently performed. be able to. Further, the guide portion can reliably perform the entry / retraction rotation of the first light shielding member 3 and the second light shielding member 4. Further, the stopper can reliably make the axial centers of the light quantity control holes 33 and 43 of the first light shielding member 3 and the second light shielding member 4 concentric with the axis of the opening 2. 3 and the second light-shielding member 4 can be reliably retained. Furthermore, since the electro-mechanical conversion element 50 is expanded and contracted along the arc, the light quantity control device A can be further reduced in size.

次に、第3実施例の光量制御装置Cを図12に基づいて説明する。本実施例の光量制御装置Cは、前記駆動部材51の第1遮光部材駆動伝達部6側の端部に第2の押付部材80を固着することにより、駆動部材51の遮光部材駆動部5に対する摺動性の向上を図っている。該押付部材80の第1遮光部材駆動伝達部6の当接突起65と接触する面が押付部81であり、駆動部材51に固着される面が固着部82である。なお、本実施例において、前記押付部材80以外は、前記第2実施例の基本的構成と同構成であるので、重複する部位については、同符号を付すことにより説明を省略する。   Next, the light quantity control device C of the third embodiment will be described with reference to FIG. The light quantity control device C according to the present embodiment fixes the second pressing member 80 to the end of the driving member 51 on the first light shielding member drive transmission unit 6 side, whereby the light shielding member driving unit 5 of the driving member 51 is against the light shielding member driving unit 5. The slidability is improved. The surface of the pressing member 80 that contacts the contact protrusion 65 of the first light shielding member drive transmission unit 6 is the pressing unit 81, and the surface that is fixed to the driving member 51 is the fixing unit 82. In this embodiment, since the configuration other than the pressing member 80 is the same as the basic configuration of the second embodiment, overlapping portions are denoted by the same reference numerals and description thereof is omitted.

本実施例の光量制御装置Cによれば、前記第2実施例の光量制御装置Cと同様の効果を有するとともに、駆動部材51の遮光部材駆動部5に対する摺動性を向上することができる。   According to the light amount control device C of the present embodiment, the same effect as the light amount control device C of the second embodiment can be obtained, and the slidability of the drive member 51 with respect to the light shielding member drive unit 5 can be improved.

第1実施例〜第3実施例の光量制御装置では、弾性部材8は、第1遮光部材3の光量制御穴33と第2遮光部材4の光量制御穴43を開口2から退避させる方向へ付勢力が作用するようにしたが、回動中心である支持穴31、41とガイド部である長穴部32、42、34、44と光量制御穴33、43の位置関係を適宜変えることにより、第1遮光部材3の光量制御穴33と第2遮光部材4の光量制御穴43を開口2へ進入させる方向へ付勢力が作用するようにしてもよい。そして、例えば、大口径状態(初期状態)の際には、第1遮光部材駆動伝達部6の光量制御穴33と第2遮光部材駆動伝達部7の光量制御穴43とが開口に進入しないように、第1遮光部材駆動伝達部6と第2遮光部材駆動伝達部7の両方を遮光部材駆動部5へ当接させる。こうすることで、開口を大口径状態(初期状態)、中口径状態、小口径状態にそれぞれ切り替えることも可能である。この光量制御装置によれば、第1実施例〜第3実施例の光量制御装置と同様の効果を有する。   In the light quantity control device according to the first to third embodiments, the elastic member 8 is attached in a direction to retract the light quantity control hole 33 of the first light shielding member 3 and the light quantity control hole 43 of the second light shielding member 4 from the opening 2. The force is applied, but by appropriately changing the positional relationship between the support holes 31 and 41 that are the rotation center, the long hole portions 32, 42, 34, and 44 that are the guide portions, and the light amount control holes 33 and 43, An urging force may be applied in a direction in which the light amount control hole 33 of the first light shielding member 3 and the light amount control hole 43 of the second light shielding member 4 enter the opening 2. For example, in a large aperture state (initial state), the light amount control hole 33 of the first light shielding member drive transmission unit 6 and the light amount control hole 43 of the second light shielding member drive transmission unit 7 do not enter the opening. In addition, both the first light shielding member drive transmission unit 6 and the second light shielding member drive transmission unit 7 are brought into contact with the light shielding member drive unit 5. By doing so, it is also possible to switch the opening to a large aperture state (initial state), a medium aperture state, and a small aperture state. This light quantity control device has the same effect as the light quantity control devices of the first to third embodiments.

なお、本発明は、例示した実施の形態に限定するものではなく、特許請求の範囲の各項に記載された内容から逸脱しない範囲の構成による実施が可能である。たとえば、前記第1実施例〜第3実施例の光量制御装置は、いずれも、2個の遮光部材を備えて開口を3段階に絞るようにしたものであるが、本発明では、遮光部材を1個として開口を3段階に絞るようにしてもよい。   In addition, this invention is not limited to illustrated embodiment, Implementation by the structure of the range which does not deviate from the content described in each item of a claim is possible. For example, each of the light quantity control devices of the first to third embodiments is provided with two light shielding members so as to restrict the opening to three stages. One opening may be narrowed down to three stages.

A:光量制御装置
B:光量制御装置
C:光量制御装置
1:保持部材
2:開口
3:第1遮光部材
4:第2遮光部材
5:遮光部材駆動部
6:第1遮光部材駆動伝達部
7:第2遮光部材駆動伝達部
8:弾性部材
10D:長穴部
10E:長穴部
10K:長穴部
10L:長穴部
11C:長穴部
11D:長穴部
32:長穴部
33:光量制御穴(開口)
34:長穴部
42:長穴部
43:光量制御穴(開口)
44:長穴部
50:電気−機械変換素子
51:駆動部材
52:押付部材
53:摩擦係合部材
60:ボス部
70:ボス部
80:押付部材
A: Light quantity control device B: Light quantity control device C: Light quantity control device 1: Holding member 2: Opening 3: First light shielding member 4: Second light shielding member 5: Light shielding member drive unit 6: First light shielding member drive transmission unit 7 : 2nd light shielding member drive transmission part 8: Elastic member 10D: Elongated hole part 10E: Elongated hole part 10K: Elongated hole part 10L: Elongated hole part 11C: Elongated hole part 11D: Elongated hole part 32: Elongated hole part 33: Light quantity Control hole (opening)
34: Long hole part 42: Long hole part 43: Light quantity control hole (opening)
44: long hole portion 50: electro-mechanical conversion element 51: driving member 52: pressing member 53: friction engagement member 60: boss portion 70: boss portion 80: pressing member

Claims (4)

保持部材に設けられた開口内に進入、あるいは該開口内から退避するように移動可能に支持した遮光部材と、
電圧を印加することにより伸縮動作する電気−機械変換素子と、該電気−機械変換素子の伸縮方向の一端面に固着された駆動部材と、前記電気−機械変換素子の伸縮方向の他端面に固着された押付部材と、前記駆動部材を摩擦係合状態に支持する前記保持部材に設けられた摩擦係合部材とを有する遮光部材駆動部と、
前記遮光部材駆動部の押付部材に当接して、前記遮光部材を前記保持部材に設けられた前記開口内に進入退避するように移動させる遮光部材駆動伝達部と、
前記遮光部材を前記開口内から退避させるように又は前記遮光部材を前記開口内へ進入させるように前記遮光部材駆動伝達部を付勢する弾性部材と、
を備えていることを特徴とする光量制御装置。
A light-shielding member supported so as to be movable so as to enter or retreat from the opening provided in the holding member;
Electro-mechanical conversion element that expands and contracts by applying a voltage, a drive member fixed to one end surface of the electro-mechanical conversion element in the expansion / contraction direction, and fixed to the other end surface of the electro-mechanical conversion element in the expansion / contraction direction A light-shielding member drive unit including the pressed member and a friction engagement member provided on the holding member that supports the drive member in a friction engagement state;
A light-shielding member drive transmission portion that contacts the pressing member of the light-shielding member drive portion and moves the light-shielding member so as to enter and retreat into the opening provided in the holding member;
An elastic member that urges the light shielding member drive transmission unit to retract the light shielding member from the opening or to allow the light shielding member to enter the opening;
A light quantity control device comprising:
前記保持部材は、前記遮光部材の移動範囲を規制するストッパーを有することを特徴とする請求項1記載の光量制御装置。   2. The light quantity control device according to claim 1, wherein the holding member has a stopper that regulates a moving range of the light shielding member. 前記遮光部材は、前記保持部材に2個設けられ、前記遮光部材駆動部に設けられた押付部材の双方向の移動により、個別に駆動されることを特徴とする請求項1又は2記載の光量制御装置。   3. The light quantity according to claim 1, wherein two light shielding members are provided on the holding member and are individually driven by bidirectional movement of a pressing member provided on the light shielding member driving unit. Control device. 前記遮光部材は、前記保持部材に2個設けられ、前記遮光部材駆動部に設けられた押付部材と、前記電気−機械変換素子の伸縮方向の前記電気−機械変換素子が固着されていない駆動部材の端部とによって前記2個の遮光部材が個別に駆動されることを特徴とする請求項1又は2記載の光量制御装置。   Two of the light shielding members are provided on the holding member, and a pressing member provided on the light shielding member driving portion and a driving member to which the electro-mechanical conversion element in the expansion / contraction direction of the electro-mechanical conversion element is not fixed The light quantity control device according to claim 1, wherein the two light shielding members are individually driven by an end of the light source.
JP2009251438A 2009-10-30 2009-10-30 Light quantity controller Pending JP2011095633A (en)

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Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011180204A (en) * 2010-02-26 2011-09-15 Canon Electronics Inc Light quantity adjusting device and optical equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011180204A (en) * 2010-02-26 2011-09-15 Canon Electronics Inc Light quantity adjusting device and optical equipment

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