JP6957248B2 - Holding device for optical components and optical equipment - Google Patents

Holding device for optical components and optical equipment Download PDF

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JP6957248B2
JP6957248B2 JP2017136202A JP2017136202A JP6957248B2 JP 6957248 B2 JP6957248 B2 JP 6957248B2 JP 2017136202 A JP2017136202 A JP 2017136202A JP 2017136202 A JP2017136202 A JP 2017136202A JP 6957248 B2 JP6957248 B2 JP 6957248B2
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lens
fastened
holding member
optical axis
fastening
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俊史 浦上
祐介 中川
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Canon Inc
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Description

本発明は、レンズ等の光学部品を保持する保持装置、及び当該保持装置を備えるカメラ等の光学機器に関する。 The present invention relates to a holding device for holding an optical component such as a lens, and an optical device such as a camera provided with the holding device.

カメラ等の光学機器には、被写体像を撮影者が観察するためのファインダ装置や被写体像に焦点を合わせるための焦点検出装置などが設けられているものがある。ファインダ装置や焦点検出装置は、１つ以上の光学部品からなる光学ユニットであり、これら光学部品は高精度かつ強固に取り付けられる必要がある。 Some optical devices such as cameras are provided with a finder device for the photographer to observe the subject image, a focus detection device for focusing on the subject image, and the like. A finder device or a focus detection device is an optical unit composed of one or more optical components, and these optical components need to be mounted with high accuracy and firmly.

従来、光学部品の保持構造として、光学部品を接着せずに保持する構成のファインダ装置において、バネ性を有した保持部材により光学部品を光軸方向及び、光軸に垂直な方向に押圧保持する構造が提案されている（特許文献１）。 Conventionally, in a finder device having a structure in which an optical component is held without being adhered as a holding structure of the optical component, the optical component is pressed and held in the optical axis direction and in the direction perpendicular to the optical axis by a holding member having a spring property. A structure has been proposed (Patent Document 1).

特開２０１５−１０２８２１号公報Japanese Unexamined Patent Publication No. 2015-102821

しかし、上記特許文献１では、光学部品を保持した保持部材を別の部材にビス締結すると、保持部材の光学部品を押圧保持する部分が歪み、変形を起こしてしまう。そして、光学部品の押圧保持する部分の歪み、変形により、光学部品の面精度が悪化してしまう。そのため、光学特性の悪化、つまり、ファインダ像の歪みが発生してしまい、ユーザの満足できるファインダ像を提供できないおそれがある。 However, in Patent Document 1, when the holding member holding the optical component is fastened to another member with screws, the portion of the holding member that presses and holds the optical component is distorted and deformed. Then, the surface accuracy of the optical component deteriorates due to the distortion and deformation of the portion of the optical component that is pressed and held. Therefore, the optical characteristics may be deteriorated, that is, the finder image may be distorted, and the finder image may not be provided to the user's satisfaction.

そこで、本発明は、光学部品の保持において簡易な構成でありつつ、保持部材をビス等で他の部材に締結しても、光学部品の面精度の悪化を最小限に抑えることが可能な光学部品の保持構造を提供することを目的とする。 Therefore, the present invention has a simple structure for holding an optical component, and even if the holding member is fastened to another member with a screw or the like, the deterioration of the surface accuracy of the optical component can be minimized. It is an object of the present invention to provide a holding structure for parts.

上記目的を達成するために、本発明の保持装置は、光学部品と、前記光学部品を保持する保持部材と、前記保持部材に対して前記光学部品の光軸方向に配置され、前記保持部材に締結部材により締結される被締結部材と、を備え、前記光学部品には、光軸から離れる方向に突出する突起部が前記光軸と直交する第１方向に互いに対向して設けられ、前記保持部材は、前記光軸と直交する前記第１方向に互いに対向する一方の前記突起部が係合して前記光学部品を前記光軸方向の前記被締結部材の側に付勢する第１付勢部材と、前記光軸と直交する前記第１方向に互いに対向する他方の前記突起部が係合して前記光学部品を前記光軸方向の前記被締結部材の側に付勢する第２付勢部材と、を有し、前記締結部材による前記保持部材に対する前記被締結部材の締結方向は、前記第１付勢部材および前記第２付勢部材により前記光学部品を付勢する方向と直交する方向であり、前記被締結部材が前記締結部材により前記保持部材に締結される位置において、前記保持部材と前記被締結部材との締結方向における剛性は、前記被締結部材に比べて前記保持部材の方が高いことを特徴とする。 In order to achieve the above object, the holding device of the present invention is arranged on the optical component, the holding member for holding the optical component, and the holding member in the optical axis direction of the optical component. The optical component includes a member to be fastened by the fastening member, and the optical component is provided with protrusions protruding in a direction away from the optical axis so as to face each other in a first direction orthogonal to the optical axis and hold the optical component. The member has a first urging in which one of the protrusions facing each other in the first direction orthogonal to the optical axis engages with each other to urge the optical component toward the member to be fastened in the optical axis direction. A second urging in which the member and the other protrusion facing each other in the first direction orthogonal to the optical axis engage with each other to urge the optical component toward the member to be fastened in the optical axis direction. The fastening direction of the fastened member to the holding member by the fastening member is a direction orthogonal to the direction in which the optical component is urged by the first urging member and the second urging member. At the position where the fastened member is fastened to the holding member by the fastening member, the rigidity of the holding member and the fastened member in the fastening direction is higher in the holding member than in the fastened member. Is characterized by high.

本発明によれば、光学部品の保持において簡易な構成でありつつ、保持部材をビス等で他の部材に締結しても、光学部品の面精度の悪化を最小限に抑えることが可能な光学部品の保持構造を提供することができる。 According to the present invention, while having a simple structure for holding an optical component, even if the holding member is fastened to another member with a screw or the like, deterioration of the surface accuracy of the optical component can be minimized. A holding structure for parts can be provided.

本発明の光学機器の実施形態の一例に係るデジタル一眼レフカメラの概略断面図である。It is schematic cross-sectional view of the digital single-lens reflex camera which concerns on an example of embodiment of the optical apparatus of this invention. 接眼ユニットの斜視図である。It is a perspective view of the eyepiece unit. 図２に示す接眼ユニットの分解斜視図である。It is an exploded perspective view of the eyepiece unit shown in FIG. 第１レンズの斜視図である。It is a perspective view of the 1st lens. 第１レンズ保持部材の斜視図である。It is a perspective view of the 1st lens holding member. 第１レンズを第１レンズ保持部材へ組み付ける様子を示す斜視図である。It is a perspective view which shows the state of assembling the 1st lens to the 1st lens holding member. 第１レンズを第１レンズ保持部材へ組み付けた後の状態を示す図である。It is a figure which shows the state after assembling the 1st lens to the 1st lens holding member. 図７（ｂ）のＡ−Ａ線断面拡大図である。FIG. 7 (b) is an enlarged cross-sectional view taken along the line AA. 図７（ｂ）のＢ−Ｂ線断面拡大図である。FIG. 7 (b) is an enlarged cross-sectional view taken along the line BB of FIG. 7 (b). 接眼ユニットの正面図である。It is a front view of the eyepiece unit. 図１０のＣ−Ｃ線断面拡大図である。FIG. 5 is an enlarged cross-sectional view taken along the line CC of FIG. ビスによる締結方向と第１レンズに作用する荷重方向とが同じ場合の比較例を示す図である。It is a figure which shows the comparative example in the case where the fastening direction by a screw and the load direction acting on the first lens are the same. 図７（ａ）のＤ部拡大図である。FIG. 7 (a) is an enlarged view of part D in FIG. 7 (a).

以下、図面を参照して、本発明の実施形態の一例を説明する。 Hereinafter, an example of the embodiment of the present invention will be described with reference to the drawings.

図１は、本発明の光学機器の実施形態の一例に係るデジタル一眼レフカメラの概略断面図である。 FIG. 1 is a schematic cross-sectional view of a digital single-lens reflex camera according to an example of an embodiment of the optical device of the present invention.

本実施形態のデジタル一眼レフカメラ（以下、カメラという。）は、図１に示すように、カメラ本体１００にレンズユニット１０が着脱可能に装着されている。レンズユニット１０は、複数のレンズ、不図示のレンズ駆動装置、露出を制御する絞り羽根群、及び絞り羽根群を駆動する絞り駆動装置等から構成されている。 In the digital single-lens reflex camera (hereinafter referred to as a camera) of the present embodiment, as shown in FIG. 1, a lens unit 10 is detachably attached to a camera body 100. The lens unit 10 is composed of a plurality of lenses, a lens driving device (not shown), a diaphragm blade group for controlling exposure, a diaphragm driving device for driving the diaphragm blade group, and the like.

カメラ本体１００は、メインミラー１１を備え，メインミラー１１は、撮影光路に進入する位置（ミラーダウン位置）と撮影光路から待避する位置（ミラーアップ位置）との間を移動する。メインミラー１１は、ミラーダウン位置では、撮影光軸に対して略４５度の角度に保持された状態で、レンズユニット１０の複数のレンズ等を通過した撮影光束を反射してフォーカシングスクリーン１３へ導くと共に、その一部を透過させてサブミラー１２へ導く。サブミラー１２は、メインミラー１１を透過した撮影光束を焦点検出装置１４へ導く。一方、ミラーアップ位置では、メインミラー１１だけでなく、サブミラー１２も撮影光路から待避する位置に移動し、後述する撮像素子１５に被写体像が結像される。 The camera body 100 includes a main mirror 11, and the main mirror 11 moves between a position of entering the shooting optical path (mirror down position) and a position of avoiding from the shooting optical path (mirror lockup position). At the mirror down position, the main mirror 11 reflects the luminous flux that has passed through the plurality of lenses of the lens unit 10 and guides it to the focusing screen 13 while being held at an angle of approximately 45 degrees with respect to the optical axis for imaging. At the same time, a part of it is transmitted and led to the sub mirror 12. The sub mirror 12 guides the luminous flux transmitted through the main mirror 11 to the focus detection device 14. On the other hand, at the mirror lockup position, not only the main mirror 11 but also the sub mirror 12 moves to a position where the sub mirror 12 is retracted from the photographing optical path, and a subject image is formed on the image sensor 15 described later.

焦点検出装置１４は、位相差方式の焦点検出を行う。焦点検出装置１４の出力信号に基づき、レンズユニット１０のレンズ駆動装置（不図示）が制御されて焦点調節が行われ、撮像素子１５に撮影光束を合焦させる。撮像素子１５は、ＣＣＤセンサやＣＭＯＳセンサ等で構成され、レンズユニット１０の複数のレンズ等を通過して結像した被写体像を電気信号に変換する。ペンタプリズム１７は、メインミラー１１で反射してフォーカシングスクリーン１３に結像した被写体像を正立正像に変換して反射する。 The focus detection device 14 performs a phase difference type focus detection. Based on the output signal of the focus detection device 14, the lens drive device (not shown) of the lens unit 10 is controlled to adjust the focus, and the image pickup element 15 is focused on the photographing luminous flux. The image pickup device 15 is composed of a CCD sensor, a CMOS sensor, or the like, and converts a subject image formed by passing through a plurality of lenses or the like of the lens unit 10 into an electric signal. The pentaprism 17 converts the subject image reflected by the main mirror 11 and formed on the focusing screen 13 into an upright orthodox image and reflects the image.

接眼ユニット１８は、ペンタプリズム１７で正立正像に変換して反射された被写体像を撮影者の目に到達させる。これにより、ユーザはフォーカシングスクリーン１３に結像した被写体像を観察することができる。接眼ユニット１８は、本発明の光学部品の保持装置の一例に相当する。 The eyepiece unit 18 converts the subject image converted into an upright image by the pentaprism 17 and brings the reflected subject image to the photographer's eyes. As a result, the user can observe the subject image formed on the focusing screen 13. The eyepiece unit 18 corresponds to an example of a holding device for optical components of the present invention.

測光装置１９は、フォーカシングスクリーン１３に結像した被写体像の輝度をペンタプリズム１７を介して測定し、算出した出力信号に基づき、シャッタ２０とレンズユニット１０の絞り駆動装置を駆動して、露光時の露出制御を行う。シャッタ２０は、機械フォーカルプレーンシャッタであり、所定の露光時間を有したシャッタ先幕とシャッタ後幕とのスリット走行を行い、撮像素子１５に結像する被写体像の露光量を制御する。 The photometric device 19 measures the brightness of the subject image imaged on the focusing screen 13 via the pentaprism 17, and drives the shutter 20 and the aperture drive device of the lens unit 10 based on the calculated output signal during exposure. Exposure control. The shutter 20 is a mechanical focal plane shutter, and performs slit traveling between the shutter front curtain and the shutter rear curtain having a predetermined exposure time to control the exposure amount of the subject image imaged on the image pickup element 15.

次に、図２及び図３を参照して、接眼ユニット１８について説明する。図２は、接眼ユニット１８の斜視図である。図３は、図２に示す接眼ユニット１８の分解斜視図である。 Next, the eyepiece unit 18 will be described with reference to FIGS. 2 and 3. FIG. 2 is a perspective view of the eyepiece unit 18. FIG. 3 is an exploded perspective view of the eyepiece unit 18 shown in FIG.

図２及び図３に示すように、接眼ユニット１８は、略矩形状の第１レンズ２００、第２レンズ４００及第３レンズ６００を有する。第１レンズ２００、第２レンズ４００及第３レンズ６００は、それぞれ透明度が高い光学用樹脂（ポリカーボネート、アクリル等）の成形品であり、中央部には、略球面形状のレンズ有効面が形成されている。なお、本発明において、矩形とは、正方形及び長方形を含む概念とする。 As shown in FIGS. 2 and 3, the eyepiece unit 18 has a substantially rectangular first lens 200, a second lens 400, and a third lens 600. The first lens 200, the second lens 400, and the third lens 600 are each molded products of highly transparent optical resins (polycarbonate, acrylic, etc.), and a substantially spherical lens effective surface is formed in the central portion. ing. In the present invention, the term "rectangle" is a concept including a square and a rectangle.

第１レンズ２００は、第１レンズ保持部材３００に保持され、第２レンズ４００及び第３レンズ６００は、それぞれ第２レンズ保持部材５００及び第３レンズ保持部材７００に接着により保持されている。なお、第１レンズ２００の第１レンズ保持部材３００による保持構造については、後述する。また、第２レンズ４００と第２レンズ保持部材５００は、第１レンズ保持部材３００に支持される。 The first lens 200 is held by the first lens holding member 300, and the second lens 400 and the third lens 600 are held by adhesion to the second lens holding member 500 and the third lens holding member 700, respectively. The holding structure of the first lens 200 by the first lens holding member 300 will be described later. Further, the second lens 400 and the second lens holding member 500 are supported by the first lens holding member 300.

第３レンズ保持部材７００には、接眼枠７１０が設けられており、撮影者は、接眼枠７１０を覗くことにより、フォーカシングスクリーン１３に結像した被写体像（ファインダ像）を観察することができる。また、第３レンズ保持部材７００の幅方向（長手方向）の両側には、腕部７２０ａ，７２０ｂが設けられ、腕部７２０ａ，７２０ｂは、それぞれビス８００ａ，８００ｂにより第１レンズ保持部材３００の幅方向の両側面に締結される。 The eyepiece frame 710 is provided on the third lens holding member 700, and the photographer can observe the subject image (finder image) formed on the focusing screen 13 by looking into the eyepiece frame 710. Further, arm portions 720a and 720b are provided on both sides of the third lens holding member 700 in the width direction (longitudinal direction), and the arm portions 720a and 720b have the width of the first lens holding member 300 by the screws 800a and 800b, respectively. Fastened on both sides in the direction.

これにより、第１レンズ保持部材３００と第３レンズ保持部材７００とが第２レンズ保持部材５００を間に挟んだ状態で強固に締結される。このため、接眼ユニット１８が密閉構造となり、接眼ユニット１８の内部へのゴミ等の異物の侵入を抑制することが可能となる。なお、ビス８００ａ，８００ｂの締結方向は、光軸方向に対して直交する方向となっている。第３レンズ保持部材７００は、本発明の被締結部材の一例に相当し、ビス８００ａ，８００ｂは、本発明の締結部材の一例に相当する。 As a result, the first lens holding member 300 and the third lens holding member 700 are firmly fastened with the second lens holding member 500 sandwiched between them. Therefore, the eyepiece unit 18 has a closed structure, and it is possible to suppress the invasion of foreign matter such as dust into the inside of the eyepiece unit 18. The fastening directions of the screws 800a and 800b are orthogonal to the optical axis direction. The third lens holding member 700 corresponds to an example of the fastening member of the present invention, and the screws 800a and 800b correspond to an example of the fastening member of the present invention.

次に、図４及び図５を参照して、第１レンズ保持部材３００による第１レンズ２００の保持構造について説明する。図４は、第１レンズ２００の斜視図である。図５は、第１レンズ保持部材３００の斜視図である。 Next, the holding structure of the first lens 200 by the first lens holding member 300 will be described with reference to FIGS. 4 and 5. FIG. 4 is a perspective view of the first lens 200. FIG. 5 is a perspective view of the first lens holding member 300.

略矩形状の第１レンズ２００の上辺部には、上方に突出する一対の第１突起部２１０ａ，２１０ｂが互いに長辺方向（第２方向）に離間して設けられている。また、略矩形状の第１レンズ２００の下辺部には、下方に突出する一対の第２突起部２２０ａ，２２０ｂが互いに長手方向に離間して設けられている。一対の第１突起部２１０ａ，２１０ｂ及び一対の第２突起部２２０ａ，２２０ｂは、第１レンズ２００の上下方向（第１方向）に対向して配置されている。 A pair of first protruding portions 210a and 210b projecting upward are provided on the upper side portion of the substantially rectangular first lens 200 so as to be separated from each other in the long side direction (second direction). Further, a pair of second protruding portions 220a and 220b projecting downward are provided on the lower side portion of the substantially rectangular first lens 200 so as to be separated from each other in the longitudinal direction. The pair of first protrusions 210a and 210b and the pair of second protrusions 220a and 220b are arranged so as to face each other in the vertical direction (first direction) of the first lens 200.

第１レンズ保持部材３００は、第１レンズ２００の一方の第１突起部２１０ａ，２１０ｂに係合し、第１レンズ２００をレンズ光軸方向の第２レンズ４００側へ付勢する一対の第１付勢部材３１０ａ，３１０ｂを有する。また、第１レンズ保持部材３００は、第１レンズ２００の他方の第２突起部２２０ａ，２２０ｂに係合し、第１レンズ２００をレンズ光軸方向の第２レンズ４００側へ付勢する一対の第２付勢部材３２０ａ，３２０ｂを有する。 The first lens holding member 300 engages with one of the first protrusions 210a and 210b of the first lens 200, and a pair of first lenses that urge the first lens 200 toward the second lens 400 in the optical axis direction of the lens. It has urging members 310a and 310b. Further, the first lens holding member 300 engages with the other second protrusions 220a and 220b of the first lens 200, and urges the first lens 200 toward the second lens 400 in the optical axis direction of the lens. It has second urging members 320a and 320b.

第１レンズ２００の一対の第１突起部２１０ａ，２１０ｂの長手方向寸法と一対の第２突起部２２０ａ，２２０ｂの長手方向寸法は、それぞれ略同一である。また、第１レンズ２００の第１突起部２１０ａと第２突起部２２０ａの短手方向（上下方向）寸法及び第１突起部２１０ｂと第２突起部２２０ｂの上下方向寸法は、それぞれ略同一である。これにより、光軸中心からバランスの取れた位置で第１レンズ２００が第１レンズ保持部材３００に係合するため、レンズ有効面に不均一な歪みが発生することなく、面精度の悪化を抑制できる。 The longitudinal dimensions of the pair of first protrusions 210a and 210b of the first lens 200 and the longitudinal dimensions of the pair of second protrusions 220a and 220b are substantially the same, respectively. Further, the lateral (vertical direction) dimensions of the first protrusion 210a and the second protrusion 220a of the first lens 200 and the vertical dimensions of the first protrusion 210b and the second protrusion 220b are substantially the same. .. As a result, the first lens 200 engages with the first lens holding member 300 at a position balanced from the center of the optical axis, so that uneven distortion does not occur on the effective surface of the lens and deterioration of surface accuracy is suppressed. can.

また、第１突起部２１０ａ，２１０ｂ及び第２突起部２２０ａ，２２０ｂは、第１レンズ２００の光軸中心から最も遠い位置であるレンズ四隅部に配置されることが好ましい。これにより、第１レンズ２００が第１付勢部材３１０ａ，３１０ｂ及び第２付勢部材３２０ａ，３２０ｂに係合することで発生する付勢力によるレンズ有効面の変形を小さくでき、レンズ有効面における面精度の悪化を抑制できる。 Further, the first protrusions 210a and 210b and the second protrusions 220a and 220b are preferably arranged at the four corners of the lens, which are the farthest positions from the center of the optical axis of the first lens 200. As a result, the deformation of the lens effective surface due to the urging force generated when the first lens 200 engages with the first urging members 310a and 310b and the second urging members 320a and 320b can be reduced, and the surface on the lens effective surface can be reduced. Deterioration of accuracy can be suppressed.

図６は、第１レンズ２００を第１レンズ保持部材３００へ組み付ける様子を示す斜視図である。図７は第１レンズ２００を第１レンズ保持部材３００へ組み付けた後の状態を示す図であり、図７（ａ）は上面図、図７（ｂ）は正面図である。 FIG. 6 is a perspective view showing how the first lens 200 is assembled to the first lens holding member 300. 7A and 7B are views showing a state after the first lens 200 is assembled to the first lens holding member 300, FIG. 7A is a top view, and FIG. 7B is a front view.

図６に示すように、第１レンズ２００を第１レンズ保持部材３００に対して斜め方向からを挿入する。つまり、第１レンズ２００の第２突起部２２０ａ，２２０ｂが第１レンズ保持部材３００の第２付勢部材３２０ａ，３２０ｂに対して斜め方向から挿入された状態となる。このとき、第１レンズ２００の第１突起部２１０ａ，２１０ｂと第１レンズ保持部材３００の第１付勢部材３１０ａ，３１０ｂはまだ接触していない。 As shown in FIG. 6, the first lens 200 is inserted into the first lens holding member 300 from an oblique direction. That is, the second protrusions 220a and 220b of the first lens 200 are inserted into the second urging members 320a and 320b of the first lens holding member 300 from an oblique direction. At this time, the first protrusions 210a and 210b of the first lens 200 and the first urging members 310a and 310b of the first lens holding member 300 are not yet in contact with each other.

第２突起部２２０ａ，２２０ｂを第２付勢部材３２０ａ，３２０ｂに引掛けた状態で、図６の矢印Ｒ方向へ第１レンズ２００を回転させながら押し込む。これにより、第１レンズ２００の第１突起部２１０ａ，２１０ｂに第１レンズ保持部材３００の第１付勢部材３１０ａ，３１０ｂが接触し始める。その後、第１レンズ保持部材３００の第１付勢部材３１０ａ，３１０ｂが弾性変形し、上方に押し広げられる。 With the second protrusions 220a and 220b hooked on the second urging members 320a and 320b, the first lens 200 is pushed in while rotating in the direction of arrow R in FIG. As a result, the first urging members 310a and 310b of the first lens holding member 300 begin to come into contact with the first protrusions 210a and 210b of the first lens 200. After that, the first urging members 310a and 310b of the first lens holding member 300 are elastically deformed and expanded upward.

なお、第１突起部２１０ａ、２１０ｂ及び第１付勢部材３１０ａ，３１０ｂの先端には、それぞれ傾斜形状部２３０ａ，２３０ｂ及び傾斜形状部３３０ａ，３３０ｂ（図８を参照）が設けられており、これにより、組立性が向上する。 The tips of the first protrusions 210a and 210b and the first urging members 310a and 310b are provided with inclined shape portions 230a and 230b and inclined shape portions 330a and 330b (see FIG. 8), respectively. As a result, the assembling property is improved.

さらに、図６の矢印Ｒ方向へ第１レンズ２００を押し込むと、第１レンズ２００の第１突起部２１０ａ，２１０ｂは、第１レンズ保持部材３００の第１付勢部材３１０ａ，３１０ｂの先端を乗り越え、第１付勢部材３１０ａ，３１０ｂの下部に潜り込む。これにより、第１突起部２１０ａ，２１０ｂが第１付勢部材３１０ａ，３１０ｂに係合し、図７に示す状態となる。 Further, when the first lens 200 is pushed in the direction of the arrow R in FIG. 6, the first protrusions 210a and 210b of the first lens 200 get over the tips of the first urging members 310a and 310b of the first lens holding member 300. , Sneak into the lower part of the first urging members 310a, 310b. As a result, the first protrusions 210a and 210b engage with the first urging members 310a and 310b, resulting in the state shown in FIG. 7.

図８は、図７（ｂ）のＡ−Ａ線断面拡大図である。第１レンズ２００を第１レンズ保持部材３００に組み付けた状態では、図８に示すように、第１レンズ保持部材３００の第１付勢部材３１０ａから第１レンズ２００の第１突起部２１０ａに対して光軸方向の第２レンズ４００側へ押さえ付ける荷重Ｆ１が作用する。 FIG. 8 is an enlarged cross-sectional view taken along the line AA of FIG. 7 (b). When the first lens 200 is assembled to the first lens holding member 300, as shown in FIG. 8, the first urging member 310a of the first lens holding member 300 to the first protrusion 210a of the first lens 200. The load F1 that presses against the second lens 400 in the optical axis direction acts.

図９は、図７（ｂ）のＢ−Ｂ線断面拡大図である。第１レンズ２００を第１レンズ保持部材３００に組み付けた状態では、図９に示すように、第１レンズ保持部材３００の第２付勢部材３２０ａから第１レンズ２００の第２突起部２２０ａに対して光軸方向の第２レンズ４００側へ押さえ付ける荷重Ｆ２が作用する。 FIG. 9 is an enlarged cross-sectional view taken along the line BB of FIG. 7 (b). When the first lens 200 is assembled to the first lens holding member 300, as shown in FIG. 9, the second urging member 320a of the first lens holding member 300 to the second protrusion 220a of the first lens 200. The load F2 that presses against the second lens 400 in the optical axis direction acts.

なお、荷重Ｆ１と荷重Ｆ２は同程度であることが好ましい。なぜなら、第１レンズ２００の四隅に均一に荷重を加えることで、第１レンズ２００のレンズ有効面に局所的な歪みを発生させず、有効面全体を均一に歪ませることで、結果として面精度の悪化を抑制できるからである。 The load F1 and the load F2 are preferably about the same. This is because by uniformly applying a load to the four corners of the first lens 200, the effective surface of the lens of the first lens 200 is not locally distorted, and the entire effective surface is uniformly distorted, resulting in surface accuracy. This is because the deterioration of the lens can be suppressed.

このように、第１レンズ保持部材３００の第１付勢部材３１０ａ，３１０ｂと第２付勢部材３２０ａ，３２０ｂに第１レンズ２００の第１突起部２１０ａ，２１０ｂと第２突起部２２０ａ，２２０ｂを係合させる。これにより、第１レンズ２００を第１レンズ保持部材３００に対して接着剤や追加部品を用いることなく、組立易く、簡易に保持できる。 In this way, the first urging members 310a, 310b and the second urging members 320a, 320b of the first lens holding member 300 are provided with the first protrusions 210a, 210b and the second protrusions 220a, 220b of the first lens 200. Engage. As a result, the first lens 200 can be easily assembled and easily held with respect to the first lens holding member 300 without using an adhesive or additional parts.

次に、図２、図１０、及び図１１を参照して、第１レンズ保持部材３００と第３レンズ保持部材７００の締結構造について説明する。図１０は、接眼ユニット１８の正面図である。図１１は、図１０のＣ−Ｃ線断面拡大図である。 Next, the fastening structure of the first lens holding member 300 and the third lens holding member 700 will be described with reference to FIGS. 2, 10, and 11. FIG. 10 is a front view of the eyepiece unit 18. FIG. 11 is an enlarged cross-sectional view taken along the line CC of FIG.

前述したように、第３レンズ保持部材７００は、腕部７２０ａ，７２０ｂがそれぞれビス８００ａ，８００ｂにより第１レンズ保持部材３００の両側部に締結され、ビス８００ａ，８００ｂの締結方向は、レンズ光軸に対して直交する方向となっている。 As described above, in the third lens holding member 700, the arms 720a and 720b are fastened to both sides of the first lens holding member 300 by the screws 800a and 800b, respectively, and the fastening directions of the screws 800a and 800b are the lens optical axes. The direction is orthogonal to the lens.

また、第１レンズ２００の第１突起部２１０ａ，２１０ｂ及び第２突起部２２０ａ，２２０ｂに対して、前述した係合による荷重Ｆ１及び荷重Ｆ２がレンズ光軸方向に対して平行方向に作用している。つまり、ビス８００ａ，８００ｂの締結方向と第１レンズ２００に対して荷重Ｆ１及び荷重Ｆ２が作用する方向とは、互いに直交している。 Further, the load F1 and the load F2 due to the engagement described above act on the first protrusions 210a and 210b and the second protrusions 220a and 220b of the first lens 200 in the direction parallel to the optical axis direction of the lens. There is. That is, the fastening directions of the screws 800a and 800b and the directions in which the load F1 and the load F2 act on the first lens 200 are orthogonal to each other.

ここで、図１２を参照して、ビス８００ａ，８００ｂの締結方向と第１レンズ２００に作用する荷重の方向との関係について説明する。図１２は、ビス８００ａ，８００ｂによる締結方向と第１レンズ２００に作用する荷重方向とが同じ場合の比較例を示す図であり、図１２（ａ）は接眼ユニットの正面図、図１２（ｂ）は接眼ユニットの背面図である。 Here, with reference to FIG. 12, the relationship between the fastening direction of the screws 800a and 800b and the direction of the load acting on the first lens 200 will be described. 12A and 12B are views showing a comparative example when the fastening direction by the screws 800a and 800b and the load direction acting on the first lens 200 are the same, and FIG. 12A is a front view of the eyepiece unit, FIG. 12B. ) Is a rear view of the eyepiece unit.

図１２の例では、第１レンズ保持部材３００に対して第３レンズ保持部材７００が背面側からビス８００ａ，８００ｂによってレンズ光軸方向に締結されている。また、第１レンズ２００は、第１レンズ保持部材３００の第１付勢部材３１０ａ，３１０ｂと第２付勢部材３２０ａ，３２０ｂに係合され、レンズ光軸方向に荷重を受けている。 In the example of FIG. 12, the third lens holding member 700 is fastened to the first lens holding member 300 from the back surface side by screws 800a and 800b in the lens optical axis direction. Further, the first lens 200 is engaged with the first urging members 310a, 310b and the second urging members 320a, 320b of the first lens holding member 300, and receives a load in the lens optical axis direction.

そして、ビス８００ａ，８００ｂ（以下、ビス８００とする）による締結力により、第１レンズ保持部材３００はレンズ光軸方向の背面側（第２レンズ４００側）に引き込まれる。その影響により、第１レンズ保持部材３００の第１付勢部材３１０ａ，３１０ｂ（以下、第１付勢部材３１０とする。）及び第２付勢部材３２０ａ，３２０ｂ（以下、第２付勢部材３２０とする。）もレンズ光軸方向の背面側に変形してしまう。 Then, the first lens holding member 300 is pulled toward the back side (second lens 400 side) in the optical axis direction of the lens by the fastening force of the screws 800a and 800b (hereinafter referred to as the screw 800). Due to the influence, the first urging members 310a and 310b (hereinafter referred to as the first urging member 310) and the second urging members 320a and 320b (hereinafter referred to as the second urging member 320) of the first lens holding member 300. ) Is also deformed to the back side in the optical axis direction of the lens.

これにより、第１レンズ２００に作用する荷重の大きさが変わってレンズ有効面に不要な歪みが発生し、面精度が悪化する。特に、レンズ光軸中心を通る直交する２平面上に対称な第１付勢部材３１０及び第２付勢部材３２０の作用点同士を結ぶ作用点ラインＫ−Ｋの投影上でビス締結すると、レンズ有効面の歪みが顕著に表れることが実験的に確かめられている。 As a result, the magnitude of the load acting on the first lens 200 changes, unnecessary distortion occurs on the effective surface of the lens, and the surface accuracy deteriorates. In particular, when the lenses are fastened with screws on the projection of the action point line KK connecting the action points of the first urging member 310 and the second urging member 320 symmetrical on two orthogonal planes passing through the center of the optical axis of the lens. It has been experimentally confirmed that the distortion of the effective surface appears remarkably.

図１２に示す接眼ユニットには、作用点ラインＫ−Ｋは４本あり、ビス８００は作用点ラインＫ−Ｋの投影上にあるため、第１レンズ２００の面精度は非常に悪化し、ファインダ像に大きな歪みが発生してしまう。また、ビス８００の締結力や第１レンズ保持部材３００の形状のバラつき、第１付勢部材３１０及び第２付勢部材３２０の形状のバラつきにより、ビス８００の締結による第１付勢部材３１０及び第２付勢部材３２０の変形量は一定とならない。従って、第１レンズ２００のレンズ有効面の歪みを制御することは非常に難しい。 Since the eyepiece unit shown in FIG. 12 has four action point lines KK and the screw 800 is on the projection of the action point line KK, the surface accuracy of the first lens 200 deteriorates significantly, and the finder The image will be greatly distorted. Further, due to the fastening force of the screw 800, the variation in the shape of the first lens holding member 300, and the variation in the shapes of the first urging member 310 and the second urging member 320, the first urging member 310 and the first urging member 310 due to the fastening of the screw 800 The amount of deformation of the second urging member 320 is not constant. Therefore, it is very difficult to control the distortion of the effective surface of the lens of the first lens 200.

そこで、図２、図１０及び図１１に示すように、ビス８００の締結方向と第１レンズ２００に作用する荷重方向とを直交させる。ビス８００の締結力により、第１レンズ保持部材３００はレンズ光軸に直交する方向、つまり幅方向の側面側に引き込まれる。その影響により、第１レンズ保持部材３００の第１付勢部材３１０及び第２付勢部材３２０もレンズ光軸に直交する方向、つまり側面側に変形する。 Therefore, as shown in FIGS. 2, 10 and 11, the fastening direction of the screw 800 and the load direction acting on the first lens 200 are orthogonal to each other. Due to the fastening force of the screw 800, the first lens holding member 300 is pulled in the direction orthogonal to the optical axis of the lens, that is, the side surface side in the width direction. Due to this effect, the first urging member 310 and the second urging member 320 of the first lens holding member 300 are also deformed in the direction orthogonal to the lens optical axis, that is, on the side surface side.

しかし、第１レンズ２００の第１突起部２１０ａ，２１０ｂと第２突起部２２０ａ，２２０ｂに作用する荷重Ｆ１，Ｆ２の方向に対して、第１レンズ保持部材３００の第１付勢部材３１０及び第２付勢部材３２０の変形方向は直交している。よって、第１付勢部材３１０及び第２付勢部材３２０が変形しても荷重Ｆ１，Ｆ２には影響を及ぼさず、接眼レンズ有効面に不要な歪みが発生せず、面精度の悪化を防止できる。 However, the first urging member 310 and the first urging member 310 of the first lens holding member 300 with respect to the directions of the loads F1 and F2 acting on the first protrusions 210a and 210b and the second protrusions 220a and 220b of the first lens 200. 2 The deformation directions of the urging member 320 are orthogonal to each other. Therefore, even if the first urging member 310 and the second urging member 320 are deformed, the loads F1 and F2 are not affected, unnecessary distortion does not occur on the effective surface of the eyepiece, and deterioration of surface accuracy is prevented. can.

なお、図１０に示すように、ビス８００の位置は、作用点ラインＫ−Ｋの投影上から離すことが好ましい。少なくともビス８００の外径が作用点ラインＫ−Ｋの投影上に接しない程度に離すことが好ましい。この理由は図１２にて説明したように、作用点ラインＫ−Ｋの投影上にてビス締結し、第１レンズ２００のレンズ有効面の歪みが大きくなることを避けるためである。 As shown in FIG. 10, the position of the screw 800 is preferably separated from the projection of the point of action line KK. It is preferable that the outer diameter of the screw 800 is at least separated so as not to come into contact with the projection of the point of action line KK. The reason for this is that, as described with reference to FIG. 12, screws are fastened on the projection of the point of action line KK to prevent the distortion of the effective surface of the lens of the first lens 200 from becoming large.

さらに好ましくは、ビス８００の位置は、本実施形態のように、第１レンズ保持部材３００の長手方向の両側面の略中央部又は短手方向の両側面の略中央部であるのが良い。なぜなら、作用点ラインＫ−Ｋの投影上からビス８００の位置を最も離すことができ、レンズの有効面の歪みを最も抑制することができるからである。さらなる利点は、第１付勢部材３１０及び第２付勢部材３２０は、第１レンズ保持部材３００の長手方向及び短手方向に対して略対称に設けられている。このため、ビス締結による第１及び第２付勢部材３１０，３２０の変形も略対称となり、レンズ有効面に不均一な歪みが発生せず、面精度の悪化を抑制できる。 More preferably, the position of the screw 800 is preferably a substantially central portion of both side surfaces in the longitudinal direction or a substantially central portion of both side surfaces in the lateral direction of the first lens holding member 300 as in the present embodiment. This is because the position of the screw 800 can be farthest from the projection of the point of action line KK, and the distortion of the effective surface of the lens can be suppressed most. A further advantage is that the first urging member 310 and the second urging member 320 are provided substantially symmetrically with respect to the longitudinal direction and the lateral direction of the first lens holding member 300. Therefore, the deformations of the first and second urging members 310 and 320 due to screw fastening are also substantially symmetrical, non-uniform distortion does not occur on the effective surface of the lens, and deterioration of surface accuracy can be suppressed.

また、本実施形態のように、第１レンズ保持部材３００の長手方向をビス８００の締結方向とすることで、ビス締結による第１及び第２付勢部材３１０，３２０の変形に対するレンズ有効面の歪みの影響度合いが小さくなる。これにより、第１レンズ２００のレンズ有効面の歪みを小さくでき、面精度の悪化を抑制できる。 Further, as in the present embodiment, by setting the longitudinal direction of the first lens holding member 300 as the fastening direction of the screw 800, the effective surface of the lens with respect to the deformation of the first and second urging members 310 and 320 due to the fastening of the screw. The degree of influence of distortion becomes small. As a result, distortion of the effective lens surface of the first lens 200 can be reduced, and deterioration of surface accuracy can be suppressed.

また、ビス８００を締結する箇所において、第１レンズ保持部材３００と第３レンズ保持部材７００との締結方向に対する剛性を比較すると、第１レンズ保持部材３００の方が剛性が高い。具体的には、図１１に示すように、第１レンズ保持部材３００は、第３レンズ保持部材７００から突出した腕部７２０ａを介してビス８００で締結される。腕部７２０ａは締結方向において、第１レンズ保持部材３００よりも厚みが薄く、弾性変形しやすい構造となっている。 Further, when comparing the rigidity of the first lens holding member 300 and the third lens holding member 700 with respect to the fastening direction at the position where the screw 800 is fastened, the first lens holding member 300 has higher rigidity. Specifically, as shown in FIG. 11, the first lens holding member 300 is fastened with a screw 800 via an arm portion 720a protruding from the third lens holding member 700. The arm portion 720a is thinner than the first lens holding member 300 in the fastening direction and has a structure that is easily elastically deformed.

これにより、ビス締結時、腕部７２０ａが積極的に締結方向に弾性変形し、ビス締結による第１レンズ保持部材３００の引き込み力を緩和する。よって、ビス締結による第１レンズ保持部材３００の第１及び第２付勢部材３１０，３２０の変形を抑制することができ、第１レンズ２００のレンズ有効面の歪みが抑制されて、面精度の悪化を防止できる。 As a result, when the screw is fastened, the arm portion 720a is positively elastically deformed in the fastening direction, and the pulling force of the first lens holding member 300 due to the screw fastening is relaxed. Therefore, deformation of the first and second urging members 310 and 320 of the first lens holding member 300 due to screw fastening can be suppressed, distortion of the effective lens surface of the first lens 200 is suppressed, and surface accuracy is improved. Deterioration can be prevented.

次に、図１３を参照して、第１レンズ２００の第１突起部２１０ａ，２１０ｂ（以下、第１突起部２１０とする。）と第１レンズ保持部材３００の第１付勢部材３１０との係合構造について説明する。図１３は、図７（ａ）のＤ部拡大図である。 Next, with reference to FIG. 13, the first protrusions 210a and 210b of the first lens 200 (hereinafter referred to as the first protrusion 210) and the first urging member 310 of the first lens holding member 300 The engagement structure will be described. FIG. 13 is an enlarged view of part D in FIG. 7 (a).

図１３に示すように、第１突起部２１０の第１付勢部材３１０と接する領域には、略円弧形状部２４０ａが設けられており、略円弧形状部２４０ａと第１付勢部材３１０とは線接触の状態となっている。前述したように、第１付勢部材３１０は、第１突起部２１０に対してレンズ光軸方向の背面側に荷重Ｆ１を作用させる。一方、ビス８００の締結により第１付勢部材３１０は、レンズ光軸に対して直交する方向、つまり側面側にわずかながら変形する。仮に第１突起部２１０と第１付勢部材３１０との接触が面接触の場合、ビス８００の締結による第１付勢部材３１０のわずかな変形でも第１突起部２１０と第１付勢部材３１０との接触ポイントが大きく変化し、荷重Ｆ１の大きさも変わってしまう。 As shown in FIG. 13, a substantially arc-shaped portion 240a is provided in the region of the first protrusion 210 in contact with the first urging member 310, and the substantially arc-shaped portion 240a and the first urging member 310 are It is in a state of line contact. As described above, the first urging member 310 causes the load F1 to act on the back side in the optical axis direction of the lens with respect to the first protrusion 210. On the other hand, by fastening the screw 800, the first urging member 310 is slightly deformed in the direction orthogonal to the optical axis of the lens, that is, on the side surface side. If the contact between the first protrusion 210 and the first urging member 310 is surface contact, even a slight deformation of the first urging member 310 due to the fastening of the screw 800 will cause the first protrusion 210 and the first urging member 310. The contact point with and is changed greatly, and the magnitude of the load F1 also changes.

しかし、本実施形態では、図１３に示すように、第１突起部２１０に設けられた略円弧形状部２４０ａにより第１付勢部材３１０ａとは線接触であるため、ビス８００の締結による第１付勢部材３１０のわずかな変形が生じても接触ポイントはほとんど変化しない。よって、荷重Ｆ１の大きさもほとんど変化しないため、ビス８００を締結しても、第１レンズ２００のレンズ有効面に不均一な歪みが発生せず、面精度の悪化を抑制できる。なお、略円弧形状部２４０ａは、第１突起部２１０に代えて第１付勢部材３１０に設けてもよい。 However, in the present embodiment, as shown in FIG. 13, since the substantially arc-shaped portion 240a provided on the first protrusion 210 is in line contact with the first urging member 310a, the first by fastening the screw 800. Even if the urging member 310 is slightly deformed, the contact point hardly changes. Therefore, since the magnitude of the load F1 hardly changes, even if the screw 800 is fastened, non-uniform distortion does not occur on the effective lens surface of the first lens 200, and deterioration of surface accuracy can be suppressed. The substantially arc-shaped portion 240a may be provided on the first urging member 310 instead of the first protrusion 210.

以上説明したように、本実施形態では、第１レンズ２００を接着剤や追加部品を用いることなく第１レンズ保持部材３００で簡易に保持することができる。また、本実施形態では、第１レンズ保持部材３００と第３レンズ保持部材７００とをビス締結しても第１レンズ２００の面精度の悪化を最小限に抑えることが可能となる。 As described above, in the present embodiment, the first lens 200 can be easily held by the first lens holding member 300 without using an adhesive or additional parts. Further, in the present embodiment, even if the first lens holding member 300 and the third lens holding member 700 are fastened with screws, it is possible to minimize the deterioration of the surface accuracy of the first lens 200.

なお、本発明の構成は、上記実施形態に例示したものに限定されるものではなく、材質、形状、寸法、形態、数、配置箇所等は、本発明の要旨を逸脱しない範囲において適宜変更可能である。 The configuration of the present invention is not limited to that illustrated in the above embodiment, and the material, shape, dimensions, form, number, arrangement location, etc. can be appropriately changed as long as the gist of the present invention is not deviated. Is.

例えば、本実施形態では、本発明の光学部品の保持装置として、接眼ユニット１８を例示したが、これに限定されず、焦点検出装置１４のレンズ保持構成や測光装置１９のレンズ保持構成やその他の光学部品の保持装置にも本発明を適用可能である。 For example, in the present embodiment, the eyepiece unit 18 is exemplified as the holding device for the optical component of the present invention, but the present invention is not limited to this, and the lens holding configuration of the focus detection device 14, the lens holding configuration of the photometric device 19, and others. The present invention can also be applied to a holding device for optical components.

１８ 接眼ユニット
１００ カメラ
２００ 第１レンズ
２１０ 第１突起部
２２０ 第２突起部
３００ 第１レンズ保持部材
３１０ 第１付勢部材
３２０ 第２付勢部材
７００ 第３レンズ保持部材
８００ ビス 18 Eyepiece unit 100 Camera 200 1st lens 210 1st protrusion 220 2nd protrusion 300 1st lens holding member 310 1st urging member 320 2nd urging member 700 3rd lens holding member 800 screw

Claims (9)

光学部品と、
前記光学部品を保持する保持部材と、
前記保持部材に対して前記光学部品の光軸方向に配置され、前記保持部材に締結部材により締結される被締結部材と、を備え、
前記光学部品には、光軸から離れる方向に突出する突起部が前記光軸と直交する第１方向に互いに対向して設けられ、
前記保持部材は、前記光軸と直交する前記第１方向に互いに対向する一方の前記突起部が係合して前記光学部品を前記光軸方向の前記被締結部材の側に付勢する第１付勢部材と、前記光軸と直交する前記第１方向に互いに対向する他方の前記突起部が係合して前記光学部品を前記光軸方向の前記被締結部材の側に付勢する第２付勢部材と、を有し、
前記締結部材による前記保持部材に対する前記被締結部材の締結方向は、前記第１付勢部材および前記第２付勢部材により前記光学部品を付勢する方向と直交する方向であり、
前記被締結部材が前記締結部材により前記保持部材に締結される位置において、前記保持部材と前記被締結部材との締結方向における剛性は、前記被締結部材に比べて前記保持部材の方が高いことを特徴とする保持装置。 Optical parts and
A holding member that holds the optical component and
A member to be fastened, which is arranged in the optical axis direction of the optical component with respect to the holding member and is fastened to the holding member by a fastening member, is provided.
The optical component is provided with protrusions protruding in a direction away from the optical axis so as to face each other in a first direction orthogonal to the optical axis.
The holding member has a first position in which one of the protrusions facing each other in the first direction orthogonal to the optical axis engages with the holding member to urge the optical component toward the member to be fastened in the optical axis direction. A second urging member engages with the other protrusions facing each other in the first direction orthogonal to the optical axis to urge the optical component toward the fastened member in the optical axis direction. With an urging member,
The fastening direction of the fastened member to the holding member by the fastening member is a direction orthogonal to the direction in which the optical component is urged by the first urging member and the second urging member.
At the position where the fastened member is fastened to the holding member by the fastening member, the rigidity of the holding member and the fastened member in the fastening direction is higher in the holding member than in the fastened member. A holding device characterized by. 前記締結部材による前記保持部材に対する前記被締結部材の締結方向は、前記第１方向、又は前記光軸に直交し、かつ前記第１方向に直交する第２方向であることを特徴とする請求項１に記載の保持装置。 The claim is characterized in that the fastening direction of the member to be fastened to the holding member by the fastening member is the first direction or the second direction orthogonal to the optical axis and orthogonal to the first direction. The holding device according to 1. 前記被締結部材が前記締結部材により前記保持部材に締結される位置において、前記保持部材と前記被締結部材との締結方向における剛性は、前記被締結部材に比べて前記保持部材の方が高いことを特徴とする請求項１又は２に記載の保持装置。 At the position where the fastened member is fastened to the holding member by the fastening member, the rigidity of the holding member and the fastened member in the fastening direction is higher in the holding member than in the fastened member. The holding device according to claim 1 or 2. 光学部品と、
前記光学部品を保持する保持部材と、
前記保持部材に対して前記光学部品の光軸方向に配置され、前記保持部材に締結部材により締結される被締結部材と、を備え、
前記光学部品には、光軸から離れる方向に突出する突起部が前記光軸と直交する第１方向に互いに対向して設けられ、
前記保持部材は、前記光軸と直交する前記第１方向に互いに対向する一方の前記突起部が係合して前記光学部品を前記光軸方向の前記被締結部材の側に付勢する第１付勢部材と、前記光軸と直交する前記第１方向に互いに対向する他方の前記突起部が係合して前記光学部品を前記光軸方向の前記被締結部材の側に付勢する第２付勢部材と、を有し、
前記締結部材による前記保持部材に対する前記被締結部材の締結方向は、前記第１付勢部材および前記第２付勢部材により前記光学部品を付勢する方向と直交する方向であり、
前記光学部品の前記第１方向に互いに対向して設けられた前記突起部は、それぞれ前記第１方向に直交する第２方向に互いに離間して一対ずつ設けられ、前記光学部品の前記光軸を通る前記第１方向の面と前記光軸を通る前記第２方向の面に対して対称に配置されており、
前記光学部品は、略矩形状とされ、前記突起部は、前記光学部品の四隅に設けられており、
前記締結部材は、前記四隅に設けられた前記突起部が前記第１付勢部材および前記第２付勢部材に係合する作用点どうしを前記第１方向に結ぶ作用点ラインと前記第２方向に結ぶ作用点ラインの投影上に接しない位置に配置されていることを特徴とする保持装置。 Optical parts and
A holding member that holds the optical component and
A member to be fastened, which is arranged in the optical axis direction of the optical component with respect to the holding member and is fastened to the holding member by a fastening member, is provided.
The optical component is provided with protrusions protruding in a direction away from the optical axis so as to face each other in a first direction orthogonal to the optical axis.
The holding member has a first position in which one of the protrusions facing each other in the first direction orthogonal to the optical axis engages with the holding member to urge the optical component toward the member to be fastened in the optical axis direction. A second urging member engages with the other protrusions facing each other in the first direction orthogonal to the optical axis to urge the optical component toward the fastened member in the optical axis direction. With an urging member,
The fastening direction of the fastened member to the holding member by the fastening member is a direction orthogonal to the direction in which the optical component is urged by the first urging member and the second urging member.
The protrusions provided so as to face each other in the first direction of the optical component are provided in pairs separated from each other in the second direction orthogonal to the first direction, respectively, and the optical axis of the optical component is provided. It is arranged symmetrically with respect to the surface in the first direction through which the surface passes and the surface in the second direction through which the optical axis passes.
The optical component has a substantially rectangular shape, and the protrusions are provided at the four corners of the optical component.
The fastening member includes an action point line and a second direction in which the protrusions provided at the four corners connect the first urging member and the action points that engage with the second urging member in the first direction. A holding device characterized in that it is arranged at a position not in contact with the projection of the line of action connected to. 前記締結部材は、前記光学部品の光軸の中心を通る平面上、もしくはその平面と直交する平面上に配置されることを特徴とする請求項４に記載の保持装置。 The holding device according to claim 4 , wherein the fastening member is arranged on a plane passing through the center of the optical axis of the optical component or on a plane orthogonal to the plane. 前記締結部材による前記保持部材と前記被締結部材との締結方向は、前記略矩形状の前記光学部品の長手方向であることを特徴とする請求項４又は５に記載の保持装置。 The holding device according to claim 4 or 5 , wherein the fastening direction between the holding member and the fastened member by the fastening member is the longitudinal direction of the substantially rectangular optical component. 前記光学部品の前記突起部は、前記第１付勢部材に対して線接触した状態で係合することを特徴とする請求項１乃至６のいずれか一項に記載の保持装置。 The holding device according to any one of claims 1 to 6, wherein the protrusion of the optical component engages with the first urging member in a line contact state. 前記光学部品は、レンズであることを特徴とする請求項１乃至７のいずれか一項に記載の保持装置。 The holding device according to any one of claims 1 to 7, wherein the optical component is a lens. 請求項１乃至８のいずれか一項に記載の保持装置を備えることを特徴とする光学機器。 An optical device comprising the holding device according to any one of claims 1 to 8.
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