JP6641036B2 - Rotating member and holding member for light amount adjusting device, light amount adjusting device, and optical device - Google Patents

Rotating member and holding member for light amount adjusting device, light amount adjusting device, and optical device Download PDF

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JP6641036B2
JP6641036B2 JP2019003586A JP2019003586A JP6641036B2 JP 6641036 B2 JP6641036 B2 JP 6641036B2 JP 2019003586 A JP2019003586 A JP 2019003586A JP 2019003586 A JP2019003586 A JP 2019003586A JP 6641036 B2 JP6641036 B2 JP 6641036B2
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fiber
holding member
fiber reinforced
rotating member
light amount
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JP2019053336A (en
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瑞恵 宮下
瑞恵 宮下
隆仁 吉澤
隆仁 吉澤
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Canon Electronics Inc
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Description

本発明は、カメラ等の撮像装置において搭載される光量調整装置の少なくとも一部の構成として組み込まれる組込部材、及びこの組込部材を備えた光量調整装置、並びにこの光量調整装置を備えた光学装置に関する。   The present invention relates to an assembling member incorporated as at least a part of a light amount adjusting device mounted on an imaging device such as a camera, a light amount adjusting device including the incorporating member, and an optical device including the light amount adjusting device. Related to the device.

従来から、例えば、絞り装置などの光量調整装置では、光通過開口としての絞り開口の形状を多数枚の絞り羽根（光量調整羽根）によって形成する構成が知られている（特許文献１参照）。この特許文献１では、台座に形成した固定開口の周囲で回動可能な駆動リングにより多数枚の絞り羽根を回動させる構成が開示されている。   2. Description of the Related Art Conventionally, for example, in a light amount adjusting device such as an aperture device, a configuration is known in which the shape of the aperture opening as a light passage opening is formed by a large number of aperture blades (light amount adjusting blades) (see Patent Document 1). This patent document 1 discloses a configuration in which a large number of diaphragm blades are rotated by a drive ring that is rotatable around a fixed opening formed in a pedestal.

実開平２−４８９２８号公報Japanese Utility Model Publication No. 2-48928

ところで、上記特許文献１の光量調整装置に組み込まれた駆動リングは、回転駆動する際に他の部材と接触しながら動作する。このように、光量調整装置に組み込まれる部品は、羽根の可動部を有するため、円滑動作のための摺動性能が求められる。なお、このような課題は、駆動リング以外の光量調整装置の組込部材でも、可動に際して摩擦が生じる部分においては同様に生じる。   By the way, the driving ring incorporated in the light amount adjusting device of Patent Document 1 operates while being in contact with other members when driven to rotate. As described above, since the components incorporated in the light amount adjusting device have the movable portions of the blades, sliding performance for smooth operation is required. Note that such a problem also occurs in a portion of the light amount adjusting device other than the drive ring where friction occurs during operation.

本発明は、摺動性能を向上した光量調整装置用の回動部材及び保持部材、及び光量調整装置並びにこれを備えた光学装置を提供する。   The present invention provides a rotating member and a holding member for a light amount adjusting device with improved sliding performance, a light amount adjusting device, and an optical device including the same.

本発明における光量調整装置用の回動部材は、光量調整装置の光通過経路における光軸の周囲を回動することで、光が通過する開口を絞るための複数の羽根を回動する回動部材であって、前記光量調整装置における他の組込部材と摺接する表面側の少なくとも一部分は、繊維強化複合材料で形成され且つその強化繊維の長手方向が前記回動部材の表面方向に配向した繊維配向性を有する繊維強化層からなり、前記繊維強化層の繊維配向が前記光軸回りに周回しており、前記回動部材のうち前記繊維強化層以外の芯部分は、前記繊維強化複合材料で一体的に形成され、且つ、前記繊維強化層における前記繊維配向性よりも前記強化繊維の繊維配向性が低く、長手方向が前記光軸方向を向く前記強化繊維と他の前記強化繊維とが複雑に交差することを特徴とする。このような本発明の態様によれば、高い摺動性能を有する光量調整装置用の回動部材を実現できる。   The rotating member for the light amount adjusting device according to the present invention is configured to rotate around the optical axis in the light passage path of the light amount adjusting device, thereby rotating a plurality of blades for narrowing an opening through which light passes. A member, at least a part of a surface side of the light amount adjusting device, which is in sliding contact with another assembly member, is formed of a fiber-reinforced composite material, and a longitudinal direction of the reinforcing fiber is oriented in a surface direction of the rotating member. The fiber reinforced layer has a fiber orientation, the fiber orientation of the fiber reinforced layer is circling around the optical axis, the core portion of the rotating member other than the fiber reinforced layer, the fiber reinforced composite material Are formed integrally, and the fiber orientation of the reinforcing fibers is lower than the fiber orientation in the fiber reinforced layer, and the reinforcing fibers and the other reinforcing fibers whose longitudinal direction faces the optical axis direction are formed. Crossing complicatedly The features. According to such an aspect of the present invention, a rotating member for a light amount adjusting device having high sliding performance can be realized.

また、上記本発明では、前記回動部材には、その回動方向に沿って複数の突起部が設けられ、前記複数の突起部は、前記回動部材を回動可能に保持する保持部材に設けられた前記光通過経路の一部となる開口の端面に接し、その接した状態で、前記回動部材は、前記保持部材に対して回動可能であり、前記繊維強化層は、少なくとも前記複数の突起部の表面を形成することを特徴とする。このような本発明の態様によれば、回動部材とその保持部材との摺接部分となる複数の突起部の表面が繊維強化層によって形成されるため、その摺接部分における摺動性能が向上する。   Further, in the present invention, the rotating member is provided with a plurality of protrusions along the rotating direction, and the plurality of protrusions are provided on a holding member that rotatably holds the rotating member. In contact with an end face of an opening that becomes a part of the provided light passage path, in this state, the rotating member is rotatable with respect to the holding member, and the fiber reinforced layer is at least the fiber reinforced layer. It is characterized in that the surfaces of the plurality of projections are formed. According to such an aspect of the present invention, since the surfaces of the plurality of protrusions serving as the sliding contact portion between the rotating member and the holding member are formed by the fiber reinforced layer, the sliding performance at the sliding contact portion is improved. improves.

また、本発明における光量調整装置用の保持部材は、光量調整装置の光通過経路における光軸の周囲を回動することで、光が通過する開口を絞るための複数の羽根を回動する回動部材を保持する保持部材であって、前記回動部材と摺接する表面側の少なくとも一部分は、繊維強化複合材料で形成され且つその強化繊維の長手方向が前記保持部材の表面方向に配向した繊維配向性を有する繊維強化層からなり、前記繊維強化層の繊維配向が前記光軸回りに周回しており、前記保持部材のうち前記繊維強化層以外の芯部分は、前記繊維強化複合材料で一体的に形成され、且つ、前記繊維強化層における前記繊維配向性よりも前記強化繊維の繊維配向性が低く、長手方向が前記光軸方向を向く前記強化繊維と他の前記強化繊維とが複雑に交差し、前記保持部材には、前記回動部材の回動方向に沿って複数の突起部が設けられ、前記保持部材に設けられた前記複数の突起部が前記回動部材に係合した状態で、前記回動部材は前記保持部材に対して回動可能であり、前記繊維強化層は、前記複数の突起部の表面を形成することを特徴とする。このような本発明の態様によれば、高い摺動性能を有する光量調整装置用の保持部材を実現できる。   In addition, the holding member for the light amount adjusting device according to the present invention is configured to rotate around the optical axis in the light passage path of the light amount adjusting device, thereby rotating a plurality of blades for narrowing an opening through which light passes. A holding member for holding a moving member, wherein at least a part of a surface side in sliding contact with the rotating member is formed of a fiber-reinforced composite material, and a fiber in which a longitudinal direction of the reinforcing fiber is oriented in a surface direction of the holding member. It is composed of a fiber reinforced layer having an orientation, and the fiber orientation of the fiber reinforced layer is wrapped around the optical axis, and a core portion of the holding member other than the fiber reinforced layer is integrally formed of the fiber reinforced composite material. Is formed, and the fiber orientation of the reinforcing fibers is lower than the fiber orientation in the fiber reinforced layer, and the reinforcing fibers and the other reinforcing fibers whose longitudinal direction faces the optical axis direction are complicated. Cross and front The holding member is provided with a plurality of protrusions along a rotation direction of the rotating member, and the plurality of protrusions provided on the holding member is engaged with the rotation member when the plurality of protrusions is engaged with the rotation member. A moving member is rotatable with respect to the holding member, and the fiber reinforced layer forms surfaces of the plurality of protrusions. According to such an aspect of the present invention, it is possible to realize a holding member for a light amount adjusting device having high sliding performance.

また、上記本発明では、前記強化繊維は、チタン化合物からなるセラミック繊維とするのが良い。このような本発明に態様によれば、チタン酸カリウム等のチタン化合物繊維の繊維表面を使って高い摺動性能を得ることができる。   In the present invention, the reinforcing fibers are preferably ceramic fibers made of a titanium compound. According to such an embodiment of the present invention, high sliding performance can be obtained using the fiber surface of a titanium compound fiber such as potassium titanate.

なお、本発明は、上述した光量調整装置用の回動部材、保持部材だけではなく、光量調整装置、あるいは、この光量調整装置を備えた光学装置にも適用可能であり、広く対象とすることが可能である。   The present invention is applicable not only to the above-described rotating member and holding member for the light amount adjusting device but also to a light amount adjusting device or an optical device including the light amount adjusting device, and is widely applicable. Is possible.

例えば、本発明の光量調整装置は、光が通過する開口を絞るための複数の羽根と、前記複数の羽根を回動させる回動部材と、前記回動部材を回動可能に保持する保持部材とを備え、前記回動部材及び前記保持部材の少なくともいずれか一方のうち他方と摺接する表面側の少なくとも一部分は、繊維強化複合材料で形成され且つその強化繊維の長手方向が前記表面の面方向に配向した繊維配向性を有する繊維強化層からなり、前記繊維強化層を備える前記回動部材又は前記保持部材のうち前記繊維強化層以外の芯部分は、前記繊維強化複合材料で一体的に形成され、且つ、前記繊維強化層における前記繊維配向性よりも前記強化繊維の繊維配向性が低く、長手方向が前記光軸方向を向く前記強化繊維と他の前記強化繊維とが複雑に交差することを特徴とする。これにより、回動部材と保持部材との間で十分な摺動性能が得られ、安定した光量調整を実現することが可能となる。   For example, the light amount adjusting device of the present invention includes a plurality of blades for narrowing an opening through which light passes, a rotating member for rotating the plurality of blades, and a holding member for rotatably holding the rotating member. At least a part of the surface side that is in sliding contact with the other of at least one of the rotating member and the holding member is formed of a fiber-reinforced composite material, and the longitudinal direction of the reinforcing fiber is a plane direction of the surface. A core portion other than the fiber reinforced layer of the rotating member or the holding member including the fiber reinforced layer is integrally formed of the fiber reinforced composite material. And, the fiber orientation of the reinforcing fibers is lower than the fiber orientation in the fiber reinforced layer, and the reinforcing fibers whose longitudinal direction is oriented in the optical axis direction and the other reinforcing fibers intersect in a complicated manner. And it features. Thereby, sufficient sliding performance can be obtained between the rotating member and the holding member, and stable light quantity adjustment can be realized.

本発明によれば、摺動性能を向上した光量調整装置用の回動部材及び保持部材、及び光量調整装置並びにこれを備えた光学装置を提供することが可能となる。   ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the rotation member and holding member for light quantity adjustment apparatuses which improved sliding performance, the light quantity adjustment apparatus, and the optical device provided with the same.

実施形態１に係る光量調整装置の概略を示す分解斜視図。FIG. 2 is an exploded perspective view schematically illustrating the light amount adjusting device according to the first embodiment. 実施形態１に係る光量調整装置の動作を示す正面図（羽根全開状態）。FIG. 4 is a front view showing the operation of the light amount adjusting device according to the first embodiment (blade fully opened state). 実施形態１に係る光量調整装置の動作を示す正面図（羽根全閉状態）。FIG. 4 is a front view showing the operation of the light amount adjusting device according to the first embodiment (blade fully closed state). 実施形態１に係る光量調整装置の概略断面図。FIG. 2 is a schematic cross-sectional view of the light amount adjusting device according to the first embodiment. 実施形態１に係る光量調整装置の回転部材における表面繊維状態を示す図。FIG. 3 is a diagram illustrating a surface fiber state of a rotating member of the light amount adjustment device according to the first embodiment. 実施形態１に係る光量調整装置の回転部材における断面繊維状態を示す図。FIG. 4 is a diagram illustrating a cross-section fiber state of a rotating member of the light amount adjustment device according to the first embodiment. 実施形態２に係る光量調整装置の概略を示す分解斜視図。FIG. 9 is an exploded perspective view schematically illustrating a light amount adjusting device according to a second embodiment. 実施形態２に係る光量調整装置の概略を示す正面図（羽根全開状態）。FIG. 9 is a front view schematically showing the light amount adjusting device according to the second embodiment (blades fully opened). 実施形態３に係る光量調整装置の概略を示す分解斜視図。FIG. 9 is an exploded perspective view schematically illustrating a light amount adjusting device according to a third embodiment. 実施形態３に係る光量調整装置の概略を示す正面図（羽根全開状態）。FIG. 10 is a front view schematically showing a light amount adjusting device according to a third embodiment (blades fully open).

以下、本発明を実施の形態に基づいて詳細に説明する。   Hereinafter, the present invention will be described in detail based on embodiments.

（実施形態１）
図１には、本発明の実施形態１である光量調整装置の分解斜視図を示す。図１に示すように、本実施形態の光量調整装置は、カメラ等の光学機器である撮影装置に搭載されて、撮影時における光量の調整を行うための装置である。この光量調整装置は、例えば、本実施形態では、回動部材である駆動リング１と、この駆動リングを回転可能に保持する保持部材２と、駆動リング１によって回動する複数の絞り羽根３と、駆動リング１との間で複数の絞り羽根３を回動可能に保持するカム部材４とを備える。 (Embodiment 1)
FIG. 1 is an exploded perspective view of the light amount adjusting device according to the first embodiment of the present invention. As shown in FIG. 1, the light amount adjusting device according to the present embodiment is a device mounted on a photographing device, which is an optical device such as a camera, for adjusting the light amount during photographing. In the present embodiment, for example, the light amount adjusting device includes a driving ring 1 that is a rotating member, a holding member 2 that rotatably holds the driving ring, and a plurality of diaphragm blades 3 that are rotated by the driving ring 1. A cam member 4 for rotatably holding the plurality of diaphragm blades 3 with the drive ring 1.

すなわち、本実施形態の光調整装置は、駆動リング１とカム部材４との間で複数の絞り羽根３を把持し、更に駆動リング１のうち複数の絞り羽根３側とは反対側からカム部材４に対し、保持部材２が接合される。これにより、保持部材２とカム部材４との間で駆動リング１が回動可能となり、この駆動リング１の回動によって複数の絞り羽根３が回動する構成となる。なお、保持部材２又はカム部材４は、このように駆動リング１及び複数の絞り羽根３からなる駆動系を実質的に覆うため、カバー部材としての役割がある。   That is, the light adjusting device of the present embodiment grips the plurality of diaphragm blades 3 between the drive ring 1 and the cam member 4 and further sets the cam member from the side of the drive ring 1 opposite to the plurality of diaphragm blades 3. 4, the holding member 2 is joined. As a result, the drive ring 1 can rotate between the holding member 2 and the cam member 4, and the rotation of the drive ring 1 causes the plurality of diaphragm blades 3 to rotate. The holding member 2 or the cam member 4 has a role as a cover member because it substantially covers the drive system including the drive ring 1 and the plurality of aperture blades 3 as described above.

以下、これら光量調整装置を構成する部材（組込部材）のそれぞれについて詳細に説明する。   Hereinafter, each of the members (embedded members) constituting the light amount adjusting device will be described in detail.

図１において、１はリング状に形成された駆動リングである。駆動リング１の中央には開口部１ａが形成されている。この駆動リング１には、その周方向７箇所に形成された軸穴部１ｂ〜１ｈと、周方向に７つに分割された複数の突起部である突条部１ｉと、周方向一部に形成されたギア部１ｊとを有する。また、駆動リング１の周方向１箇所には、遮光部１ｋが形成されている。   In FIG. 1, reference numeral 1 denotes a drive ring formed in a ring shape. An opening 1 a is formed in the center of the drive ring 1. The drive ring 1 has shaft holes 1b to 1h formed at seven locations in the circumferential direction, a plurality of protrusions 1i that are a plurality of protrusions divided into seven in the circumferential direction, and a part in the circumferential direction. And a gear portion 1j formed. A light-shielding portion 1k is formed at one position in the circumferential direction of the drive ring 1.

２はリング状に形成された保持部材である。保持部材２の中央には上記駆動リング１の開口部１ａに対して連通する開口部２ａが形成されている。また、この開口部２ａの内周面２ｂは、後述するが駆動リング１が摺接する面となる。   Reference numeral 2 denotes a holding member formed in a ring shape. An opening 2 a communicating with the opening 1 a of the drive ring 1 is formed at the center of the holding member 2. The inner peripheral surface 2b of the opening 2a is a surface with which the drive ring 1 slides, as will be described later.

３は光量調整羽根となる絞り羽根である。本実施形態では、７枚の絞り羽根３を用いる場合について説明するが、３枚以上の複数の絞り羽根３を使用する絞り装置に適用することができる。   Reference numeral 3 denotes an aperture blade serving as a light amount adjusting blade. In the present embodiment, a case where seven diaphragm blades 3 are used will be described. However, the present invention can be applied to a diaphragm device using three or more diaphragm blades 3.

また、絞り羽根３は、回動中心軸となる第１軸部３ａ、および回動のための駆動力が入力される被駆動軸である第２軸部３ｂが互いに反対側の面に形成され、先端に向かって先細り形状に形成された羽根部３ｃとを有する。これら各絞り羽根３の羽根部３ｃは、光通過経路内に向かってそれぞれ移動することにより、光を遮蔽する部分となる。   The diaphragm blade 3 has a first shaft portion 3a serving as a rotation center axis and a second shaft portion 3b serving as a driven shaft to which a driving force for rotation is input, formed on surfaces opposite to each other. And a blade portion 3c formed in a tapered shape toward the tip. The blade portion 3c of each of the diaphragm blades 3 is a portion that blocks light by moving toward the light passage path.

４はリング状に形成され、各絞り羽根３の移動を案内するためのカム部材であり、本実施形態における光量調整装置のベース部材を兼ねている。このカム部材４の中央には、上記駆動リングの開口部１ａ及び保持部材２の開口部２ａとそれぞれ連通する開口部４ａが形成されている。また、カム部材４には、その周方向７箇所にカム溝部４ｂ〜４ｈが形成されている。さらに、カム部材４の周方向１箇所には、穴部４ｉとモータ取り付け部４ｊが設けられている。   Reference numeral 4 denotes a ring-shaped cam member for guiding the movement of each of the aperture blades 3, and also serves as a base member of the light amount adjusting device in the present embodiment. At the center of the cam member 4, an opening 4a is formed which communicates with the opening 1a of the drive ring and the opening 2a of the holding member 2, respectively. The cam member 4 has cam grooves 4b to 4h formed at seven locations in the circumferential direction. Further, a hole 4i and a motor mounting portion 4j are provided at one location in the circumferential direction of the cam member 4.

５は駆動リング１を回転駆動するためのステッピングモータである。ステッピングモータ５の出力軸には、ピニオンギア６がその出力軸と一体回転するよう取り付けられている。ステッピングモータ５は、カム部材４のモータ取り付け部４ｊに固定され、ピニオンギア６は、カム部材４の穴部４ｉを貫通して駆動リング１のギア部１ｊと噛み合う。なお、ステッピングモータ５を、保持部材２に固定してもよい。そして、これら駆動リング１、カム部材４、ステッピングモータ５およびピニオンギア６により、本実施形態の光量調整装置の駆動機構が構成される。   Reference numeral 5 denotes a stepping motor for driving the drive ring 1 to rotate. A pinion gear 6 is attached to the output shaft of the stepping motor 5 so as to rotate integrally with the output shaft. The stepping motor 5 is fixed to the motor mounting portion 4j of the cam member 4, and the pinion gear 6 penetrates through the hole 4i of the cam member 4 and meshes with the gear portion 1j of the drive ring 1. Note that the stepping motor 5 may be fixed to the holding member 2. The drive ring 1, the cam member 4, the stepping motor 5, and the pinion gear 6 constitute a drive mechanism of the light amount adjusting device of the present embodiment.

７は位置センサであり、例えば、フォトインタラプタにより構成されている。位置センサ７の投光部と受光部との間に駆動リング１に形成された遮光部１ｋが入り込むことにより、駆動リング１がその初期位置（所定位置）にあることを検知することができる。ここにいう初期位置は、複数の絞り羽根３によって形成される絞り開口の径（サイズ）が所定の開放開口径となる位置である。位置センサ７により検出された初期位置を基準として、ステッピングモータ５に与える駆動パルス信号の数をカウントすることで、絞り開口径を制御し、光量を調整することができる。   Reference numeral 7 denotes a position sensor, which is constituted by, for example, a photo interrupter. When the light-shielding portion 1k formed on the drive ring 1 enters between the light-emitting portion and the light-receiving portion of the position sensor 7, it is possible to detect that the drive ring 1 is at its initial position (predetermined position). The initial position here is a position where the diameter (size) of the aperture opening formed by the plurality of aperture blades 3 becomes a predetermined open aperture diameter. By counting the number of drive pulse signals given to the stepping motor 5 with reference to the initial position detected by the position sensor 7, the aperture diameter can be controlled and the light amount can be adjusted.

保持部材２は、カム部材４との間に絞り羽根３および駆動リング１をこの順で配置する空間を形成してカム部材４に固定されることで、カム部材４に対する回転部材１および絞り羽根３の脱落を防止する。駆動リング１に形成された突条部１ｉは、保持部材２の開口部２ａ内に回転可能に挿入される。駆動リング１は、複数の突条部１ｉの外周面が保持部材２の開口部２ａの内周面２ｂに対して摺動することで、その周方向（光軸回り方向）にて回転可能に支持される。なお、このような保持部材２を形成する材料としては、例えば、ポリカーボネート樹脂にガラスフレークを添加したポリカーボネート複合材料等が挙げられる。   The holding member 2 forms a space in which the diaphragm blade 3 and the drive ring 1 are arranged in this order between the holding member 2 and the cam member 4, and is fixed to the cam member 4. 3 is prevented from falling off. The protrusion 1i formed on the drive ring 1 is rotatably inserted into the opening 2a of the holding member 2. The drive ring 1 is rotatable in the circumferential direction (the direction around the optical axis) by the outer peripheral surface of the plurality of ridges 1 i sliding on the inner peripheral surface 2 b of the opening 2 a of the holding member 2. Supported. In addition, as a material for forming such a holding member 2, for example, a polycarbonate composite material obtained by adding glass flakes to a polycarbonate resin and the like can be mentioned.

また、絞り羽根３の第１軸部３ａはそれぞれ、駆動リング１に形成された軸穴部１ｂ〜１ｈに回動可能に挿入される。一方、第２軸部３ｂはそれぞれ、カム部材４に形成されたカム溝部４ｂ〜４ｈに挿入される。   The first shaft portions 3a of the aperture blade 3 are rotatably inserted into shaft holes 1b to 1h formed in the drive ring 1, respectively. On the other hand, the second shaft portions 3b are respectively inserted into cam grooves 4b to 4h formed in the cam member 4.

カム部材４に固定されたステッピングモータ５が駆動されてピニオンギア６が回転すると、ピニオンギア６にギア部１ｊが噛み合っている駆動リング１も回転する。これにより、絞り羽根３は、第２軸部３ｂがカム部材４のカム溝部４ｂ〜４ｈに沿って移動し（すなわち、第２軸部３ｂがカム溝部４ｂ〜４ｈから駆動力を受けて）、第１軸部３ａを中心に回動する。   When the stepping motor 5 fixed to the cam member 4 is driven to rotate the pinion gear 6, the drive ring 1 in which the gear portion 1j meshes with the pinion gear 6 also rotates. As a result, in the diaphragm blade 3, the second shaft portion 3b moves along the cam grooves 4b to 4h of the cam member 4 (that is, the second shaft portion 3b receives driving force from the cam grooves 4b to 4h), It rotates around the first shaft portion 3a.

各絞り羽根３は、周方向にて均等間隔で配置、すなわち、光通過経路を取り囲むように環状配置されており、それぞれの羽根部３ｃが他の絞り羽根の羽根部と重なり合うことで、それらの内側に光通過開口である絞り開口を形成する。そして、絞り羽根３が回動することで羽根部３ｃの重なり量が変化するとともに、絞り開口径が連続的に変更され、通過する光量を調整することが可能となる。   Each of the aperture blades 3 is arranged at equal intervals in the circumferential direction, that is, annularly arranged so as to surround the light passage path. A stop aperture, which is a light passage aperture, is formed inside. When the diaphragm blade 3 rotates, the overlapping amount of the blade portion 3c changes, and the diameter of the diaphragm opening is continuously changed, so that the amount of light passing therethrough can be adjusted.

図２には、上記のように構成された光量調整装置の保持部材２側からの図を示す（羽根全開状態）。また、図３には、図２における光量調整装置の羽根全閉状態を示す。本実施形態における駆動リング１を回転させると、この駆動リング１及びカム部材４に係合する複数の絞り羽根３は、図２に示す絞り羽根３の全開状態（光通過開口を開いた状態）から、図３に示す絞り羽根３の全閉状態（光通過開口を閉じた状態）に移行する。このように駆動リング１が回動する際、保持部材２の開口部２ａの内周面２ｂに対して、駆動リング１の複数の突条部１ｉが摺動する（図４参照）。そのため、駆動リング１が回動するにつれ、突条部１ｉと開口部２ａの内周面２ｂとの間に摩擦が生じる。   FIG. 2 shows a view from the holding member 2 side of the light quantity adjusting device configured as described above (the blades are fully opened). FIG. 3 shows a fully closed state of the blade of the light amount adjusting device in FIG. When the drive ring 1 in the present embodiment is rotated, the plurality of aperture blades 3 that engage with the drive ring 1 and the cam member 4 are in a fully opened state (a state in which the light passage opening is opened) of the aperture blade 3 shown in FIG. Then, the state shifts to a fully closed state (a state in which the light passage opening is closed) of the diaphragm blade 3 shown in FIG. When the drive ring 1 rotates in this manner, the plurality of ridges 1i of the drive ring 1 slide on the inner peripheral surface 2b of the opening 2a of the holding member 2 (see FIG. 4). Therefore, as the drive ring 1 rotates, friction occurs between the ridge 1i and the inner peripheral surface 2b of the opening 2a.

ここで、本実施形態では、このような摩擦が生じる光量調整装置の組込部材、例えば、駆動リング１は、全体がセラミックス繊維強化複合材料から形成されている。具体的には、駆動リング１は、セラミックス繊維強化複合材料に含まれるセラミックス繊維の長手方向が駆動リング１の表面方向に実質的に配向した繊維配向性を有するセラミックス繊維強化層１００を有する。   Here, in the present embodiment, the assembly member of the light amount adjusting device in which such friction occurs, for example, the drive ring 1 is entirely formed of a ceramic fiber reinforced composite material. Specifically, the drive ring 1 has a ceramic fiber reinforced layer 100 having a fiber orientation in which the longitudinal direction of the ceramic fibers contained in the ceramic fiber reinforced composite material is substantially oriented in the surface direction of the drive ring 1.

このセラミックス繊維強化層１００は、主に、セラミックス繊維強化複合材料に含まれる樹脂と分散した微細なセラミックス繊維とで構成される。なお、セラミックス繊維強化層１００において駆動リング１の表面方向に実質的にセラミックス繊維が配向するとは、例えば、このセラミックス繊維の長手方向が、駆動リング１の表面方向に配向している割合の方が、厚さ方向に向いている割合よりも相対的に高いことを示す。このようにセラミックス繊維強化層１００が上記の繊維配向を有することにより、駆動リング１と他の部材（本実施形態では保持部材２）との高い摺動性能を得ることができる。なお、セラミックス繊維強化層１００の繊維配向が面方向において実質的に揃っているので、仮にセラミックス繊維を担持する樹脂部分が摺接面から削れ落ちて、セラミックス繊維の外周面（側面）がそのまま摺接面に出現したとしても、セラミックス繊維の外周面が摺接面の面方向となっているため、各セラミックス繊維が摺動性を低下させることを有効に防ぐことができ、駆動リング１と他の部材との高い摺動性を十分に確保できる。   The ceramic fiber reinforced layer 100 is mainly composed of a resin contained in the ceramic fiber reinforced composite material and dispersed fine ceramic fibers. In the ceramic fiber reinforced layer 100, the ceramic fibers are substantially oriented in the surface direction of the drive ring 1 when, for example, the ratio of the longitudinal direction of the ceramic fibers oriented in the surface direction of the drive ring 1 is better. , Relative to the thickness direction. Since the ceramic fiber reinforced layer 100 has the above fiber orientation, high sliding performance between the drive ring 1 and another member (the holding member 2 in the present embodiment) can be obtained. Since the fiber orientation of the ceramic fiber reinforced layer 100 is substantially uniform in the plane direction, the resin portion supporting the ceramic fiber is temporarily scraped off from the sliding contact surface, and the outer peripheral surface (side surface) of the ceramic fiber is slid. Even if it appears on the contact surface, since the outer peripheral surface of the ceramic fiber is in the surface direction of the sliding contact surface, it is possible to effectively prevent each ceramic fiber from deteriorating the slidability. High slidability with the member can be sufficiently ensured.

例えば、駆動リング１を回転させるにつれて駆動リング１と保持部材２との間で生じる摩擦から駆動リング１の表面側でセラミックス繊維強化層１００の樹脂部分が削れたとしても、残ったセラミックス繊維はその面方向に配向していることから、保持部材２とセラミックス繊維の長手方向に沿った外周面とが実質的に摺接することになる。つまり、セラミックス繊維強化層１００の表面に出現した各セラミックス繊維の外周面が摺接面となって、駆動リング１と保持部材２との間で駆動リング１の高い摺動性能を長期に亘って維持することが可能となる。また、セラミックス繊維強化層１００の表面に塗装によって保護膜を形成した場合には、使用開始当初は保護膜の表面が摺接面となり、保護膜が削れた後は、セラミックス繊維強化層の表面（樹脂表面）が摺接面となり、その後、樹脂表面が削れた後は、セラミックス繊維の外周面が出現した面が摺接面となる。なお、保護膜を設けない場合は、セラミックス繊維強化層１００の表面が摺接面となる。   For example, even if the resin portion of the ceramic fiber reinforced layer 100 is shaved on the surface side of the drive ring 1 due to friction generated between the drive ring 1 and the holding member 2 as the drive ring 1 is rotated, the remaining ceramic fibers are not removed. Since they are oriented in the plane direction, the holding member 2 and the outer peripheral surface along the longitudinal direction of the ceramic fibers substantially slide. In other words, the outer peripheral surface of each ceramic fiber appearing on the surface of the ceramic fiber reinforced layer 100 becomes a sliding contact surface, and the high sliding performance of the drive ring 1 between the drive ring 1 and the holding member 2 is maintained for a long time. It can be maintained. When a protective film is formed on the surface of the ceramic fiber reinforced layer 100 by painting, the surface of the protective film becomes a sliding contact surface at the beginning of use, and after the protective film is shaved, the surface of the ceramic fiber reinforced layer ( After the resin surface has been shaved, the surface on which the outer peripheral surface of the ceramic fiber appears becomes the sliding contact surface. When the protective film is not provided, the surface of the ceramic fiber reinforced layer 100 becomes a sliding surface.

なお、セラミックス繊維強化層１００は、例えば、セラミックス繊維強化複合材料を金型成形することによって作製することが可能であり、そのセラミックス繊維の寸法（長さや直径等）や成形時の圧力や温度などを適宜調整することにより、所望の繊維配向を形成することが可能となる。   Note that the ceramic fiber reinforced layer 100 can be produced by, for example, molding a ceramic fiber reinforced composite material by a metal mold, and the dimensions (length, diameter, and the like) of the ceramic fiber, pressure and temperature during molding, and the like. By appropriately adjusting, it is possible to form a desired fiber orientation.

ここで、セラミックス繊維強化複合材料について説明する。セラミックス繊維強化複合材料としては、例えば、チタン酸カリウム繊維等のセラミックス繊維とポリカーボネート等の樹脂材料の複合材料が挙げられる。チタン酸カリウム繊維は一般式Ｋ２０・ｎＴｉＯ２で示される。また、セラミックス繊維として、例えば、平均繊維径０．３乃至０．６μｍ、平均繊維長１０乃至２０μｍと極めて微細なチタン酸カリウム繊維（大塚化学製：８チタン酸カリウム繊維）を用いると、本実施形態における繊維配向の形成において有効である。つまり、本発明では、セラミックス繊維としてセラミックス短繊維を用いれば、繊維配向の形成において有利である。すなわち、セラミックス繊維強化層がセラミックス短繊維強化層であることが高い摺動性能を確保する上で好ましい。特に、セラミックス短繊維を用いると、上記繊維配向性が更に改善され、摺接面の表面粗さを小さく抑えることが可能となることから、高い摺動性能を得ることが可能となる。さらに、セラミックス繊維としては、例えば、高強度・高弾性・高アスペクト比特徴を有していることが好ましい。優れた補強性能を発揮するからである。なお、チタン酸カリウム繊維以外のセラミックス繊維であっても、繊維長が比較的短く且つ高強度・高弾性等の特性を満たせば、他のチタン化合物繊維であってもよいし、チタン系以外のセラミックス繊維であってもよい。 Here, the ceramic fiber reinforced composite material will be described. Examples of the ceramic fiber reinforced composite material include a composite material of a ceramic fiber such as potassium titanate fiber and a resin material such as polycarbonate. Potassium titanate fibers are represented by the formula K 2 0 · nTiO 2. In addition, when extremely fine potassium titanate fiber (manufactured by Otsuka Chemical: potassium 8-titanate fiber) having an average fiber diameter of 0.3 to 0.6 μm and an average fiber length of 10 to 20 μm is used as the ceramic fiber, for example, It is effective in forming fiber orientation in the form. That is, in the present invention, if ceramic short fibers are used as ceramic fibers, it is advantageous in forming fiber orientation. That is, it is preferable that the ceramic fiber reinforced layer be a ceramic short fiber reinforced layer in order to ensure high sliding performance. In particular, when ceramic short fibers are used, the fiber orientation is further improved, and the surface roughness of the sliding contact surface can be suppressed to a small value, so that high sliding performance can be obtained. Further, the ceramic fiber preferably has, for example, high strength, high elasticity, and high aspect ratio characteristics. This is because they exhibit excellent reinforcement performance. In addition, even if it is a ceramic fiber other than potassium titanate fiber, other titanium compound fibers may be used as long as the fiber length is relatively short and the properties such as high strength and high elasticity are satisfied. Ceramic fibers may be used.

なお、硬さの指標であるモース硬度においては、例えば、炭素繊維が６、ガラス繊維が７に対し、チタン酸カリウム繊維（大塚化学製：８チタン酸カリウム繊維）は４と柔軟であり、被摺動部材を摩耗させにくい。本実施形態では、駆動リング１の保持部材２に対する摺動性能を向上させていることから、ポリカーボネート複合材料から保持部材２が摩擦によって削れてしまうことを有効に防ぐことが可能となる。   In the Mohs hardness, which is an index of hardness, for example, carbon fiber is 6 and glass fiber is 7, while potassium titanate fiber (manufactured by Otsuka Chemical: potassium titanate fiber 8) is 4 and flexible. It is difficult to wear the sliding member. In the present embodiment, since the sliding performance of the drive ring 1 with respect to the holding member 2 is improved, it is possible to effectively prevent the holding member 2 from being scraped from the polycarbonate composite material due to friction.

また、本実施形態においては、セラミックス繊維強化層１００に含有させるセラミックス繊維としては、例えば、繊維表面に導電化処理が施されず、チタン酸カリウム等のセラミックス材料自体によって繊維表面が形成され、その繊維表面を摺接面として使うことにより、高い摺動性能を得ることができる。   In the present embodiment, as the ceramic fibers to be contained in the ceramic fiber reinforced layer 100, for example, the fiber surface is not subjected to a conductive treatment, and the fiber surface is formed by a ceramic material itself such as potassium titanate. By using the fiber surface as the sliding contact surface, high sliding performance can be obtained.

ここで、図５には、上述したセラミックス繊維強化複合材料を使用した成形部材の模式的な表面状態を示す。図４に示すように、従来の炭素繊維やガラス繊維よりも比較的柔らかいセラミックス繊維Ｆの長手方向が表面に配向していることで、高い摺動性能を得ることができ、また保持部材２の摩耗による削れ等を有効に低減できる。   Here, FIG. 5 shows a schematic surface state of a molded member using the above-mentioned ceramic fiber reinforced composite material. As shown in FIG. 4, since the longitudinal direction of the ceramic fiber F, which is relatively softer than the conventional carbon fiber or glass fiber, is oriented on the surface, high sliding performance can be obtained. Shaving due to wear and the like can be effectively reduced.

図６には、上述したセラミックス繊維強化複合材料を使用した成形部材の模式的な断面図を示す。図６に示すように、表面部は表面方向に配向しているが、セラミックス繊維強化層１００以外の芯部分は、セラミックス繊維のマトリックス構造Ｍを有しているため、セラミックス繊維同士が厚さ方向等において複雑に交差することで、駆動リング１全体の剛性を十分に確保できる。これにより、駆動リング１を薄く成形できるため、駆動リング１の軽量化や回転駆動の性能を向上できる。   FIG. 6 is a schematic sectional view of a molded member using the above-described ceramic fiber reinforced composite material. As shown in FIG. 6, the surface portion is oriented in the surface direction, but since the core portion other than the ceramic fiber reinforced layer 100 has a matrix structure M of ceramic fibers, the ceramic fibers are aligned in the thickness direction. And so on, the rigidity of the entire drive ring 1 can be sufficiently secured. As a result, the drive ring 1 can be formed thin, so that the drive ring 1 can be reduced in weight and the rotational drive performance can be improved.

以下、本発明を実施例及び比較例を対比しながら詳細に説明する。   Hereinafter, the present invention will be described in detail with reference to examples and comparative examples.

＜実施例１＞
実施例１の駆動リングとして、ポリカーボネート(ＰＣ)樹脂にセラミックス繊維（チタン酸カリウム繊維）を５重量％添加して得られたセラミックス繊維複合材料（商品グレード：ＣＴ１１２Ｎ／大塚化学製）を使って駆動リング１（塗装なし）を作製し、ポリカーボネート樹脂にガラスフレーク２０重量％添加して得られた材料を保持部材２に用いて、上述の光量調整装置に組み込み、絞り動作耐久試験を行った。この結果、表１に示すように、１００万回動作後でも作動、絞り精度は良好であり、駆動リング１及び保持部材２の外観面においても目立った摩耗はなかった。また、この実施例１の駆動リング１では、塗装がなくても、１００万回動作を超える高い耐久性を実現することができた。 <Example 1>
The drive ring of Example 1 is driven by using a ceramic fiber composite material (commercial grade: CT112N / Otsuka Chemical) obtained by adding 5% by weight of ceramic fiber (potassium titanate fiber) to polycarbonate (PC) resin. A ring 1 (without coating) was prepared, and a material obtained by adding 20% by weight of glass flakes to a polycarbonate resin was used for the holding member 2 and incorporated in the above-described light amount adjusting device, and a drawing operation durability test was performed. As a result, as shown in Table 1, the operation and drawing accuracy were good even after 1,000,000 operations, and the drive ring 1 and the holding member 2 did not have noticeable wear on the appearance. Further, with the drive ring 1 of Example 1, high durability exceeding 1 million operations could be realized without coating.

＜実施例２＞
実施例２の駆動リングとして、ポリカーボネート(ＰＣ)樹脂にセラミックス繊維（チタン酸カリウム繊維）を１５重量％添加して得られたセラミックス繊維複合材料（商品グレード：ＣＴ１３２ＮＣ／大塚化学製）を使って駆動リング１（塗装なし）を作製し、ポリカーボネート樹脂にガラスフレーク２０重量％添加して得られた材料を保持部材２に用いて、上述の光量調整装置に組み込み、絞り動作耐久試験を行った。この結果、表１に示すように、１００万回動作後でも作動、絞り精度は良好であり、駆動リング１及び保持部材２の外観面においても目立った摩耗はなかった。また、この実施例３の駆動リング１では、塗装がなくても、１００万回動作を超える高い耐久性を実現することができた。 <Example 2>
The drive ring of Example 2 was driven using a ceramic fiber composite material (commercial grade: CT132NC / Otsuka Chemical) obtained by adding 15% by weight of ceramic fiber (potassium titanate fiber) to polycarbonate (PC) resin. A ring 1 (without coating) was prepared, and a material obtained by adding 20% by weight of glass flake to a polycarbonate resin was used for the holding member 2 and incorporated in the above-described light amount adjusting device, and a drawing operation durability test was performed. As a result, as shown in Table 1, the operation and drawing accuracy were good even after 1,000,000 operations, and the drive ring 1 and the holding member 2 did not have noticeable wear on the appearance. Further, with the drive ring 1 of the third embodiment, high durability exceeding one million operations could be realized without coating.

＜比較例１＞
続いて参考のため、比較例１を説明する。比較例１の駆動リングとして、ポリカーボネート樹脂にガラス繊維を２０重量％添加して得られたガラス繊維複合材料を使用して駆動リング（塗装なし）を作製し、ポリカーボネート樹脂にガラスフレーク２０重量％添加して得られた材料を保持部材２に用いて、上述の光量調整装置に組み込み、絞り動作耐久試験を行った。この結果、表１に示すように、１５万回動作で駆動リング、保持部材共に摩耗し材料が削れた。 <Comparative Example 1>
Subsequently, Comparative Example 1 will be described for reference. As the drive ring of Comparative Example 1, a drive ring (no coating) was prepared using a glass fiber composite material obtained by adding 20% by weight of glass fiber to a polycarbonate resin, and 20% by weight of glass flake was added to the polycarbonate resin. The material thus obtained was used for the holding member 2 and incorporated in the above-mentioned light amount adjusting device, and an aperture operation durability test was performed. As a result, as shown in Table 1, both the driving ring and the holding member were worn by the operation of 150,000 times and the material was shaved.

＜比較例２＞
比較例２の駆動リングとして、ポリカーボネート樹脂に炭素繊維を１５重量％添加して得られた材料を使用して駆動リング（塗装なし）を作製し、ポリカーボネート樹脂にガラスフレーク２０重量％添加して得られた材料を保持部材２に用いて、上述の光量調整装置に組み込み、絞り動作耐久試験を行った。この結果、表１に示すように、１５万回動作で駆動リング、保持部材共に摩耗し材料が削れた。 <Comparative Example 2>
As a drive ring of Comparative Example 2, a drive ring (without coating) was prepared using a material obtained by adding 15% by weight of carbon fiber to a polycarbonate resin, and obtained by adding 20% by weight of glass flakes to a polycarbonate resin. The obtained material was used for the holding member 2 and incorporated in the above-mentioned light amount adjusting device, and an aperture operation durability test was performed. As a result, as shown in Table 1, both the driving ring and the holding member were worn by the operation of 150,000 times and the material was shaved.

＜比較例３＞
比較例３の駆動リングとして、ポリカーボネート樹脂に炭素繊維を１５重量％添加して得られた材料を使用して駆動リング（塗装なし）を作製し、ポリカーボネート樹脂に炭素繊維を１５重量％添加して得られた材料を保持部材に用いて、上述の光量調整装置に組み込み、絞り動作耐久試験を行った。この結果、表１に示すように、５万回動作で駆動リング、保持部材共に摩耗し材料が削れた。 <Comparative Example 3>
As the drive ring of Comparative Example 3, a drive ring (not coated) was prepared using a material obtained by adding 15% by weight of carbon fiber to a polycarbonate resin, and 15% by weight of carbon fiber was added to the polycarbonate resin. The obtained material was used for the holding member, incorporated in the above-described light amount adjusting device, and subjected to an aperture operation durability test. As a result, as shown in Table 1, the driving ring and the holding member were worn by 50,000 operations and the material was shaved.

＜比較例４＞
比較例４の駆動リングとして、ポリカーボネート樹脂に炭素繊維を１５重量％添加して得られた材料を使用して駆動リング（塗装なし）を作製し、ポリカーボネート樹脂にガラス繊維を２０重量％添加して得られた材料を保持部材に用いて、上述の光量調整装置に組み込み、絞り動作耐久試験を行った。この結果、表１に示すように、５万回動作で駆動リング、保持部材共に摩耗し材料が削れた。 <Comparative Example 4>
As the drive ring of Comparative Example 4, a drive ring (without coating) was prepared using a material obtained by adding 15% by weight of carbon fiber to a polycarbonate resin, and 20% by weight of glass fiber was added to the polycarbonate resin. The obtained material was used for the holding member, incorporated in the above-described light amount adjusting device, and subjected to an aperture operation durability test. As a result, as shown in Table 1, the driving ring and the holding member were worn by 50,000 operations and the material was shaved.

＜比較例５＞
比較例５の駆動リングとして、ポリカーボネート樹脂にガラス繊維を２０重量％添加して得られた材料を使用して駆動リング（塗装なし）を作製し、ポリカーボネート樹脂にガラス繊維を２０重量％添加して得られた材料を保持部材に用いて、上述の光量調整装置に組み込み、絞り動作耐久試験を行った。この結果、表１に示すように、５万回動作で駆動リング、保持部材共に摩耗し材料が削れた。 <Comparative Example 5>
As the drive ring of Comparative Example 5, a drive ring (without coating) was prepared using a material obtained by adding 20% by weight of glass fiber to a polycarbonate resin, and 20% by weight of glass fiber was added to the polycarbonate resin. The obtained material was used for the holding member, incorporated in the above-described light amount adjusting device, and subjected to an aperture operation durability test. As a result, as shown in Table 1, the driving ring and the holding member were worn by 50,000 operations and the material was shaved.

Figure 0006641036
Figure 0006641036

以上説明した各実施例は代表的な例にすぎず、本発明の実施に際しては、各実施例に対して種々の変形や変更が可能である。   Each of the embodiments described above is only a typical example, and various modifications and changes can be made to each embodiment when the present invention is implemented.

（実施形態２）
図７には、実施形態２に係る光量調整装置の概略を示す分解斜視図を示す。また、図８には、図７の光量調整装置の概略を示す正面図（羽根全開状態）を示す。図７及び図８に示すように、本実施形態の光量調整装置においては、駆動リング１０の開口部１０ａの周縁において筒状突起部となる環状突起部１１を設け、この環状突起部１１を、保持部材２０の開口部２０ａを規定する内周面２０ｂ（凸部２０ｃ）に摺接するようにした以外は、上述した実施形態１と同様である。なお、図７及び図８において、実施形態１と同一部分には同一符号を付して重複する説明は省略する。 (Embodiment 2)
FIG. 7 is an exploded perspective view schematically showing the light amount adjusting device according to the second embodiment. FIG. 8 is a front view (in a fully opened state) of the light amount adjusting device of FIG. As shown in FIGS. 7 and 8, in the light amount adjusting device according to the present embodiment, an annular projection 11 serving as a cylindrical projection is provided on the periphery of the opening 10 a of the drive ring 10. Embodiment 4 is the same as Embodiment 1 described above, except that the holding member 20 slides on an inner peripheral surface 20b (convex portion 20c) that defines an opening 20a. 7 and 8, the same parts as those in the first embodiment are denoted by the same reference numerals, and redundant description will be omitted.

詳細には、本実施形態では、駆動リング１０の環状突起部１１の表面がセラミックス繊維強化層１００によって構成されている。一方、保持部材２０には、開口部２０ａの内周面２０ｂにおいて実質的に等間隔で７箇所の凸部２０ｃが設けられている。各凸部２０ｃは、開口部２０ａの内周面２０ｂから光通過経路側に向かって突出して設けられ、その表面はＲ面となっている。そして、本実施形態においては、駆動リング１０を回転させると、駆動リング１０の環状突起部１１が保持部材２０の凸部２０ｃに摺接する。このとき、本実施形態では、この環状突起部のうち凸部２０ｃに摺接する側の表面を構成する部分が、セラミックス繊維強化層１００によって構成させているため、上述した実施形態１と同様に、高い摺動性能を得ることが可能となる。   Specifically, in the present embodiment, the surface of the annular projection 11 of the drive ring 10 is formed of the ceramic fiber reinforced layer 100. On the other hand, the holding member 20 is provided with seven projections 20c at substantially equal intervals on the inner peripheral surface 20b of the opening 20a. Each projection 20c is provided so as to protrude from the inner peripheral surface 20b of the opening 20a toward the light passage path, and the surface thereof is an R surface. In the present embodiment, when the drive ring 10 is rotated, the annular projection 11 of the drive ring 10 comes into sliding contact with the projection 20c of the holding member 20. At this time, in the present embodiment, since the portion of the surface of the annular projection that is in sliding contact with the projection 20c is constituted by the ceramic fiber reinforced layer 100, similar to the first embodiment described above, High sliding performance can be obtained.

（実施形態３）
図９には、実施形態３に係る光量調整装置の概略を示す分解斜視図を示す。また、図１０には、図９の光量調整装置の概略を示す正面図（羽根全開状態）を示す。図９及び図１０に示すように、本実施形態の光量調整装置においては、駆動リング１０の開口部１０ａの周縁において筒状突起部となる環状突起部１１を設け、この環状突起部１１を、保持部材２の開口部２ａを規定する内周面２ｂに摺接するようにした以外は、上述した実施形態２と同様である。なお、図９及び図１０において、実施形態１又は２と同一部分には同一符号を付して重複する説明は省略する。 (Embodiment 3)
FIG. 9 is an exploded perspective view schematically showing the light amount adjusting device according to the third embodiment. FIG. 10 is a front view (in a fully opened state) of the light amount adjusting device of FIG. 9. As shown in FIGS. 9 and 10, in the light amount adjusting device of the present embodiment, an annular projection 11 serving as a cylindrical projection is provided on the periphery of the opening 10 a of the drive ring 10. Embodiment 2 is the same as Embodiment 2 described above, except that the holding member 2 is in sliding contact with the inner peripheral surface 2b defining the opening 2a. 9 and 10, the same parts as those in the first or second embodiment are denoted by the same reference numerals, and redundant description will be omitted.

詳細には、本実施形態では、駆動リング１０の環状突起部１１の表面がセラミックス繊維強化層１００によって構成されている。そして、本実施形態では、駆動リング１０の環状突起部１１と、保持部材２の内周面２ｂとが面接触で摺接する。この場合でも、本実施形態では、この環状突起部１１のうち保持部材２の内周面２ｂに摺接する側の表面を構成する部分が、セラミックス繊維強化層１００によって構成させているため、上述した実施形態１または２と同様に、高い摺動性能を得ることが可能となる。   Specifically, in the present embodiment, the surface of the annular projection 11 of the drive ring 10 is formed of the ceramic fiber reinforced layer 100. In the present embodiment, the annular projection 11 of the drive ring 10 and the inner peripheral surface 2b of the holding member 2 are in sliding contact with each other by surface contact. Even in this case, in the present embodiment, since the portion of the annular protrusion 11 that forms the surface on the side that comes into sliding contact with the inner peripheral surface 2b of the holding member 2 is formed by the ceramic fiber reinforced layer 100, the above description is made. As in the first or second embodiment, high sliding performance can be obtained.

（他の実施形態）
以上本発明を各実施形態１〜３に基づいて詳細に説明したが、本発明は上述した各実施形態１〜３に限定されるものではない。例えば、上述した実施形態１では、駆動リング１側においてセラミックス繊維強化層１００を適用した場合について説明したが、本発明は勿論これに限定されず、例えば、保持部材２のうち駆動リング１と接触する部分において少なくともセラミックス繊維強化層１００を適用してもよく、実施形態２、３においてもこれを適用してもよい。 (Other embodiments)
Although the present invention has been described in detail based on the first to third embodiments, the present invention is not limited to the first to third embodiments. For example, in the first embodiment described above, the case where the ceramic fiber reinforced layer 100 is applied on the drive ring 1 side has been described. However, the present invention is not limited to this. At least the ceramic fiber reinforced layer 100 may be applied to the portion to be formed, and may be applied to the second and third embodiments.

また、上述した実施形態１では、駆動リング１と保持部材２のうち片方の駆動リング１に対してセラミックス繊維強化層１００を適用した場合について説明したが、本発明は勿論これに限定されず、例えば、駆動リング１及び保持部材２の両方において相互に接触する部分のそれぞれにセラミックス繊維強化層１００を適用してもよい。   In the first embodiment described above, the case where the ceramic fiber reinforced layer 100 is applied to one of the drive ring 1 of the drive ring 1 and the holding member 2 has been described. However, the present invention is not limited to this. For example, the ceramic fiber reinforced layer 100 may be applied to each of the portions where both the drive ring 1 and the holding member 2 are in contact with each other.

なお、上述したセラミックス繊維強化層１００は、光量調整装置の組込部材間で摺接する部分だけに適宜設けてもよいし、組込部材の全体をセラミックス繊維強化複合材料によって形成してもよい。   In addition, the above-mentioned ceramic fiber reinforced layer 100 may be appropriately provided only in a portion that is in sliding contact between the built-in members of the light amount adjusting device, or the whole built-in member may be formed of a ceramic fiber reinforced composite material.

１ 駆動リング
２ 保持部材
３ 絞り羽根
４ カム部材
５ ステッピングモータ DESCRIPTION OF SYMBOLS 1 Drive ring 2 Holding member 3 Aperture blade 4 Cam member 5 Stepping motor

Claims (6)

光量調整装置の光通過経路における光軸の周囲を回動することで、光が通過する開口を絞るための複数の羽根を回動する回動部材であって、
前記光量調整装置における他の組込部材と摺接する表面側の少なくとも一部分は、繊維強化複合材料で形成され且つその強化繊維の長手方向が前記回動部材の表面方向に配向した繊維配向性を有する繊維強化層からなり、
前記繊維強化層の繊維配向が前記光軸回りに周回しており、
前記回動部材のうち前記繊維強化層以外の芯部分は、前記繊維強化複合材料で一体的に形成され、且つ、前記繊維強化層における前記繊維配向性よりも前記強化繊維の繊維配向性が低く、長手方向が前記光軸方向を向く前記強化繊維と他の前記強化繊維とが複雑に交差することを特徴とする光量調整装置用の回動部材。 A rotating member that rotates a plurality of blades for narrowing an opening through which light passes by rotating around an optical axis in a light passage path of the light amount adjusting device,
At least a part of the surface side of the light amount adjusting device that is in sliding contact with another assembly member is formed of a fiber-reinforced composite material, and has a fiber orientation in which the longitudinal direction of the reinforcing fiber is oriented in the surface direction of the rotating member. Consists of a fiber reinforced layer,
The fiber orientation of the fiber reinforced layer is circling around the optical axis,
The core portion of the rotating member other than the fiber reinforced layer is integrally formed of the fiber reinforced composite material, and the fiber orientation of the reinforcing fibers is lower than the fiber orientation in the fiber reinforced layer. A rotating member for the light amount adjusting device, wherein the reinforcing fiber whose longitudinal direction faces the optical axis direction and another reinforcing fiber intersect in a complicated manner. 前記回動部材には、その回動方向に沿って複数の突起部が設けられ、
前記複数の突起部は、前記回動部材を回動可能に保持する保持部材に設けられた前記光通過経路の一部となる開口の端面に接し、その接した状態で、前記回動部材は、前記保持部材に対して回動可能であり、
前記繊維強化層は、少なくとも前記複数の突起部の表面を形成することを特徴とする請求項１に記載の光量調整装置用の回動部材。 The rotating member is provided with a plurality of protrusions along the rotating direction,
The plurality of protrusions are in contact with an end face of an opening that is a part of the light passage path provided on a holding member that rotatably holds the rotating member, and in the contact state, the rotating member is , Rotatable with respect to the holding member,
The rotating member according to claim 1, wherein the fiber reinforced layer forms at least surfaces of the plurality of protrusions. 光量調整装置の光通過経路における光軸の周囲を回動することで、光が通過する開口を絞るための複数の羽根を回動する回動部材を保持する保持部材であって、
前記回動部材と摺接する表面側の少なくとも一部分は、繊維強化複合材料で形成され且つその強化繊維の長手方向が前記保持部材の表面方向に配向した繊維配向性を有する繊維強化層からなり、
前記繊維強化層の繊維配向が前記光軸回りに周回しており、
前記保持部材のうち前記繊維強化層以外の芯部分は、前記繊維強化複合材料で一体的に形成され、且つ、前記繊維強化層における前記繊維配向性よりも前記強化繊維の繊維配向性が低く、長手方向が前記光軸方向を向く前記強化繊維と他の前記強化繊維とが複雑に交差し、
前記保持部材には、前記回動部材の回動方向に沿って複数の突起部が設けられ、
前記保持部材に設けられた前記複数の突起部が前記回動部材に係合した状態で、前記回動部材は前記保持部材に対して回動可能であり、
前記繊維強化層は、前記複数の突起部の表面を形成することを特徴とする光量調整装置用の保持部材。 A holding member that holds a rotating member that rotates a plurality of blades for narrowing an opening through which light passes by rotating around an optical axis in a light passage path of the light amount adjustment device,
At least a part of the surface side in sliding contact with the rotating member is formed of a fiber reinforced composite material and has a fiber orientation having a fiber orientation in which the longitudinal direction of the reinforcing fibers is oriented in the surface direction of the holding member,
The fiber orientation of the fiber reinforced layer is circling around the optical axis,
The core portion of the holding member other than the fiber reinforced layer is integrally formed of the fiber reinforced composite material, and the fiber orientation of the reinforcing fibers is lower than the fiber orientation in the fiber reinforced layer, The reinforcing fibers whose longitudinal direction faces the optical axis direction and the other reinforcing fibers intersect in a complicated manner,
The holding member is provided with a plurality of protrusions along a rotation direction of the rotation member,
In a state where the plurality of protrusions provided on the holding member are engaged with the rotating member, the rotating member is rotatable with respect to the holding member,
The holding member for a light quantity adjusting device, wherein the fiber reinforced layer forms surfaces of the plurality of protrusions. 前記強化繊維は、チタン化合物からなるセラミック繊維であることを特徴とする請求項１または２に記載の光量調整装置用の回動部材。   The rotating member according to claim 1 or 2, wherein the reinforcing fiber is a ceramic fiber made of a titanium compound. 光が通過する開口を絞るための複数の羽根と、
前記複数の羽根を回動させる回動部材と、
前記回動部材を回動可能に保持する保持部材とを備え、
前記回動部材及び前記保持部材の少なくともいずれか一方のうち他方と摺接する表面側の少なくとも一部分は、繊維強化複合材料で形成され且つその強化繊維の長手方向が前記表面の面方向に配向した繊維配向性を有する繊維強化層からなり、
前記繊維強化層を備える前記回動部材又は前記保持部材のうち前記繊維強化層以外の芯部分は、前記繊維強化複合材料で一体的に形成され、且つ、前記繊維強化層における前記繊維配向性よりも前記強化繊維の繊維配向性が低く、長手方向が前記光軸方向を向く前記強化繊維と他の前記強化繊維とが複雑に交差することを特徴とする光量調整装置。 A plurality of blades for narrowing the aperture through which light passes;
A rotating member for rotating the plurality of blades,
A holding member that holds the rotating member rotatably,
At least a part of the surface side that is in sliding contact with the other of at least one of the rotating member and the holding member is formed of a fiber-reinforced composite material, and the longitudinal direction of the reinforcing fiber is oriented in the surface direction of the surface. Consisting of a fiber reinforced layer having orientation,
A core portion other than the fiber reinforced layer of the rotating member or the holding member including the fiber reinforced layer is integrally formed of the fiber reinforced composite material, and the fiber orientation in the fiber reinforced layer The light amount adjusting device, wherein the fiber orientation of the reinforcing fiber is low, and the reinforcing fiber whose longitudinal direction faces the optical axis direction and another reinforcing fiber intersect in a complicated manner. 請求項５に記載の光量調整装置を備えたことを特徴とする光学装置。   An optical device comprising the light amount adjusting device according to claim 5.
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