JP2016081001A - Display member provided in finder, method for processing display member frame line mold, and camera using display member - Google Patents

Display member provided in finder, method for processing display member frame line mold, and camera using display member Download PDF

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JP2016081001A
JP2016081001A JP2014215225A JP2014215225A JP2016081001A JP 2016081001 A JP2016081001 A JP 2016081001A JP 2014215225 A JP2014215225 A JP 2014215225A JP 2014215225 A JP2014215225 A JP 2014215225A JP 2016081001 A JP2016081001 A JP 2016081001A
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display member
frame
line
finder
frame line
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JP6410556B2 (en
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洸輔 斎藤
Kosuke Saito
洸輔 斎藤
幸伸 大倉
Yukinobu Okura
幸伸 大倉
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Canon Inc
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Canon Inc
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Abstract

PROBLEM TO BE SOLVED: To provide a display member provided in a finder, in which, pertaining to a convex portion serving as an index and formed in a focusing screen optical member that is disposed at or near the image formation position of the finder used in a single lens reflex camera, the sharpness of frame lines serving as the index and the outer circumferential contour are reduced in irregularities, for excellent visibility of the index.SOLUTION: The present invention is a display member provided in the finder of a camera having a reflection prism group comprising a plurality of reflection prisms for reflecting the illumination light radiated in a focus detection range from an illumination and guiding the reflected light to the eyes of a photographer, and a frame line formed so as to enclose the reflection prism group so that light from a subject and the illumination light from the illumination will not be transmitted or reflected in the direction in which they are guided to the eyes of the photographer, wherein a plurality of conical parts are arranged within the line width of the frame line, and convex portions lower than the conical parts are arranged within the line width on both sides of a line configured by the arrangement of the conical parts.SELECTED DRAWING: Figure 1

Description

本発明は、スーパーインポーズ機能を有するカメラのファインダー内に設けられる表示部材、表示部材の枠線の金型加工方法及び表示部材を用いたカメラに関する。   The present invention relates to a display member provided in a finder of a camera having a superimpose function, a frame processing method for a frame of the display member, and a camera using the display member.

従来、カメラのファインダーは、撮像範囲の物体を視認すると同時に、撮像範囲、測距範囲、測光範囲を示す指標となるスーパーインポーズ機能を備えている。さらに、近年は、撮影視野内で複数の測距、測光ポイントを設定して場面に応じて最適な測距、測光を行える機能を付加したカメラが実現している。このようなカメラは、その測距、測光ポイントの位置を示す複数の指標をファインダー視野内で発光、非発光で、表示、非表示に切り替えることにより、撮影者にその位置を知らせている。   2. Description of the Related Art Conventionally, a camera finder has a superimpose function that serves as an index indicating an imaging range, a distance measurement range, and a photometry range at the same time as visually recognizing an object in the imaging range. Furthermore, in recent years, a camera has been realized which has a function for performing optimum distance measurement and photometry according to the scene by setting a plurality of distance measurement and photometry points within the field of view. Such a camera notifies the photographer of the position by switching a plurality of indicators indicating the positions of the distance measurement and photometry points to light-emitting and non-light-emitting within the viewfinder field and display and non-light-emitting.

しかしながら、従来のスーパーインポーズ機能は金属膜蒸着を行っており、製造コストが高く、また、蒸着位置ずれの発生で見えの品位が良くないという課題を有していた。これに対し、例えば特許文献1では、低コストで視認性の良いスーパーインポーズ表示方法として、光学平板上に測距、測光ポイントの位置を示す複数の四角形の枠と反射プリズム群を設けている。この反射プリズム群は、四角形の枠が形成されている光学平板の表面と反対側の表面に、少なくとも2方向に傾斜した斜面同士が接して形成される稜線からなる反射プリズムを稜線の向きが同一になるように複数配列して形成されたものである。   However, the conventional superimpose function has a problem that metal film deposition is performed, the manufacturing cost is high, and the appearance quality is not good due to the occurrence of the deposition position shift. On the other hand, for example, in Patent Document 1, as a superimpose display method with low cost and good visibility, a plurality of rectangular frames and reflecting prism groups indicating the positions of the distance measurement and photometry points are provided on the optical flat plate. . This reflecting prism group is the same as the reflecting prism composed of a ridge line formed by contacting inclined surfaces inclined in at least two directions on the surface opposite to the surface of the optical flat plate on which the rectangular frame is formed. It is formed by arranging a plurality so as to be.

また、照明からの照射光を斜面で反射させて撮影者の目に反射光を届くようにするものである。撮影者は、照明発光時に反射プリズムの反射光が撮影者の瞳に導かれることにより、ファインダー内で点灯を視認できる。一方、照明非発光時は、撮影者はファインダー内の反射プリズム群が存在する範囲を点として視認できる。   In addition, the illumination light from the illumination is reflected on the slope so that the reflected light reaches the photographer's eyes. The photographer can visually recognize the lighting in the viewfinder when the reflected light of the reflecting prism is guided to the photographer's pupil during illumination emission. On the other hand, when the illumination is not emitted, the photographer can visually recognize the range where the reflecting prism group in the finder exists as a point.

一方、ファインダー上でオートフォーカス位置を撮影者に認識させるために、光学平板上に四角形などの枠が形成されている。例えば、特許文献2では、枠を構成する枠線の形状をV字凸形状で形成する方法が開示されている。このことにより、光がV字凸形状の斜面で曲がり撮影者の目に光が届かなく、撮影者はV字凸形状を黒い線状の指標として認識することができる。   On the other hand, a frame such as a quadrangle is formed on the optical plate so that the photographer can recognize the autofocus position on the viewfinder. For example, Patent Document 2 discloses a method of forming the shape of a frame line constituting a frame in a V-shaped convex shape. As a result, the light bends on the slope of the V-shaped convex shape and the light does not reach the photographer's eyes, and the photographer can recognize the V-shaped convex shape as a black linear index.

特開2005−338662号公報JP 2005-338661 A 特開2008−180970号公報JP 2008-180970 A

しかしながら、従来の光学平板は、特許文献1と特許文献2の併用だけでは枠線の鮮明性が劣るという問題があった。図9に従来例の光学平板を示す。(A)は光学平板上の枠線及び反射プリズム群の断面図であり、(B)はファインダー視野内図である。図9(A)に示すように、被写体からの光Lが反射プリズム111の斜面112及び113で屈折して光学平板101内を通り、V字凸形状114の傾斜面115及び116で屈折して、撮影者の目に届くことがあった。この現象は、ある一定の高さの枠線のV字凸形状の稜線と反射プリズムの稜線が平行であるときに発生する。   However, the conventional optical flat plate has a problem that the sharpness of the frame line is inferior only by the combined use of Patent Document 1 and Patent Document 2. FIG. 9 shows a conventional optical flat plate. (A) is a cross-sectional view of the frame line on the optical flat plate and the reflecting prism group, and (B) is a viewfinder view inside view. As shown in FIG. 9A, the light L from the subject is refracted by the inclined surfaces 112 and 113 of the reflecting prism 111, passes through the optical flat plate 101, and is refracted by the inclined surfaces 115 and 116 of the V-shaped convex shape 114. , Could reach the photographer's eyes. This phenomenon occurs when the ridge line of the V-shaped convex shape of the frame line having a certain height is parallel to the ridge line of the reflecting prism.

図9(B)は、左右中央領域内の枠線をファインダー内で観察した図である。前記現象により光Lが撮影者の目に導かれて、枠線内の反射プリズムが形成されている枠線121の範囲が白く抜けることがあった。このことによって、枠線内で色の濃淡に差がつき、枠線の視認性が悪化するという問題があった。   FIG. 9B is a view of the frame line in the left and right central region observed in the viewfinder. Due to the above phenomenon, the light L is guided to the photographer's eyes, and the range of the frame 121 where the reflecting prisms in the frame are formed may be white. As a result, there is a problem in that the color density varies within the frame line, and the visibility of the frame line deteriorates.

従って、本発明の目的は、指標となる枠線の鮮明性及び枠外周輪郭の凹凸を少なくして、指標の視認性に優れるファインダー内に設けられる表示部材及び表示部材の枠線の金型加工方法を提供することである。   Accordingly, an object of the present invention is to provide a display member provided in a viewfinder having excellent visibility of an index and a mold processing of the frame of the display member by reducing the sharpness of the frame of the index and the unevenness of the outer periphery of the frame. Is to provide a method.

上記目的を達成するため、本発明のカメラのファインダー内に設けられる表示部材は、焦点検出領域で照明から照射される照明光を反射して撮影者の目に導くための複数の反射プリズムからなる反射プリズム群と、被写体からの光や照明から照射される照明光を撮影者の目に導く方向に透過ならびに反射させないように前記反射プリズム群を囲うように形成された枠線とを有する、カメラのファインダー内に設けられる表示部材において、前記枠線の線幅内に複数の円錐部が配列され、かつ、前記円錐部の配列により構成された線の両側において前記線幅内に前記円錐部より低い凸部が配列されていることを特徴としている。   In order to achieve the above object, the display member provided in the finder of the camera of the present invention comprises a plurality of reflecting prisms for reflecting the illumination light emitted from the illumination in the focus detection area and guiding it to the photographer's eyes. A camera having a reflecting prism group and a frame line formed so as to surround the reflecting prism group so as not to transmit and reflect the light from the subject and the illumination light emitted from the illumination in a direction leading to the photographer's eyes In the display member provided in the finder, a plurality of conical portions are arranged within the line width of the frame line, and on both sides of the line configured by the arrangement of the conical portions, the conical portion is within the line width. It is characterized in that low convex portions are arranged.

また、上記目的を達成するため、本発明のカメラのファインダー内に設けられる表示部材の枠線の金型加工方法は、前記枠線を形成する円錐部及びV字を凹状に反転させた形状に対して、角錐工具を回転させて切削加工することを特徴としている。   In order to achieve the above object, the frame processing method for the frame of the display member provided in the finder of the camera of the present invention has a shape in which the conical part and the V-shape forming the frame are inverted into a concave shape. On the other hand, it is characterized in that cutting is performed by rotating a pyramid tool.

更に、上記目的を達成するため、本発明のカメラは、上記表示部材をファインダー光学系に配置したことを特徴としている。   Furthermore, in order to achieve the above object, the camera of the present invention is characterized in that the display member is arranged in a finder optical system.

本発明によれば、一眼レフカメラに用いられ、ファインダー内に設けられる表示部材に形成される凸部からなる枠線の形状が、所望の線幅内で複数配列された円錐部と、その両端に配置された所望の線幅内で円錐部より低いV字形の凸部により構成されている。そのため、スーパーインポーズ機能の視認性向上のみならず、枠線の濃度を均一化でき、視認性を向上させることが可能となる。   According to the present invention, a conical portion that is used in a single-lens reflex camera and has a plurality of frame line shapes formed by convex portions formed on a display member provided in a viewfinder, and both ends thereof are arranged within a desired line width. It is comprised by the V-shaped convex part lower than a cone part within the desired line | wire width arrange | positioned in (3). Therefore, not only the visibility of the superimpose function is improved, but also the density of the frame line can be made uniform, and the visibility can be improved.

本発明に係る一実施形態によるファインダー内に設けられる表示部材としての光学平板を備えた一眼レフカメラの光学系の構成を示す概略図である。It is the schematic which shows the structure of the optical system of the single-lens reflex camera provided with the optical flat plate as a display member provided in the finder by one Embodiment which concerns on this invention. 本発明の実施形態におけるカメラの光学平板の図である。It is a figure of the optical flat plate of the camera in embodiment of this invention. 図2の光学平板の指標としての枠内の反射プリズムの平面図である。(A)は図2の光学平板の左右領域の反射プリズムである。(B)は図2の光学平板の中央領域の反射プリズムである。It is a top view of the reflecting prism in a frame as a parameter | index of the optical flat plate of FIG. (A) is a reflecting prism in the left and right regions of the optical flat plate of FIG. (B) is a reflecting prism in the central region of the optical flat plate of FIG. 図2の光学平板の左右領域における指標としての枠の部分拡大図である。It is the elements on larger scale of the frame as a parameter | index in the left-right area | region of the optical flat plate of FIG. 図2の光学平板の左右領域における指標としての枠の部分拡大図である。(A)は平面図である。(B)は(A)のA−A断面図である。It is the elements on larger scale of the frame as a parameter | index in the left-right area | region of the optical flat plate of FIG. (A) is a top view. (B) is AA sectional drawing of (A). 光学平板を成形するのに使用する金型を製作する加工機の模式図である。(A)は平面図である。(B)は正面図である。It is a schematic diagram of the processing machine which manufactures the metal mold | die used for shape | molding an optical flat plate. (A) is a top view. (B) is a front view. 図6の加工機に使用される回転工具の図である。(A)は回転工具を先端側から見た図である。(B)は正面図である。It is a figure of the rotary tool used for the processing machine of FIG. (A) is the figure which looked at the rotary tool from the front end side. (B) is a front view. 図2の光学平板の製造方法を説明する概略図である。It is the schematic explaining the manufacturing method of the optical flat plate of FIG. 従来例の光学平板を示す図である。(A)は光学平板上の枠線及び反射プリズム群の断面図である。(B)はファインダー視野内図である。It is a figure which shows the optical flat plate of a prior art example. (A) is sectional drawing of the frame line on an optical flat plate, and a reflective prism group. (B) is a viewfinder internal view.

本発明の係る一実施形態によるファインダー内表示部材を添付の図面に基づいて詳細に説明する。なお、以下の実施形態に記載する数値は、参考数値であって、いかなる意味においても本発明を限定するものではないことは言うまでもない。   An in-finder display member according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the numerical values described in the following embodiments are reference numerical values, and needless to say, the present invention is not limited in any sense.

図1は、本発明に係る実施形態によるファインダー(ファインダー光学系)内に設けられた表示部材としての光学平板6を備えた一眼レフカメラ1の光学系の構成を示す概略図である。   FIG. 1 is a schematic diagram showing a configuration of an optical system of a single-lens reflex camera 1 including an optical flat plate 6 as a display member provided in a finder (finder optical system) according to an embodiment of the present invention.

不図示の被写体からの光によって生じた被写体像は、撮影光学系2を含むレンズ鏡筒3を通り、カメラボディ4内のクイックリターンミラー5で反射し光学平板6上に結像する。レンズ鏡筒3は、カメラボディ4に着脱自在または一体化されている。クイックリターンミラー5の後方(撮影光学系2からの光の直進する方向)には、不図示の銀塩フィルムや固体撮像素子(CCDやCMOSセンサ)が配置されている。   A subject image generated by light from a subject (not shown) passes through the lens barrel 3 including the photographing optical system 2 and is reflected by the quick return mirror 5 in the camera body 4 to form an image on the optical flat plate 6. The lens barrel 3 is detachable or integrated with the camera body 4. A silver salt film and a solid-state image sensor (CCD or CMOS sensor) (not shown) are arranged behind the quick return mirror 5 (the direction in which light from the photographing optical system 2 goes straight).

クイックリターンミラー5は、カメラのレリーズに連動して回動することにより、撮影光路とファインダー光路を切り替えるようになっている。クイックリターンミラー5で上方に反射された光は、光学平板6面上に結像する。ここで、光学平板6の下面6Bはフレネル面が形成され、また、光学平板6の上面6Aはマット面が形成されており、ピント板やフォーカシングスクリーンなどと称されるものである。   The quick return mirror 5 switches between the photographing optical path and the finder optical path by rotating in conjunction with the release of the camera. The light reflected upward by the quick return mirror 5 forms an image on the surface of the optical flat plate 6. Here, the lower surface 6B of the optical flat plate 6 is formed with a Fresnel surface, and the upper surface 6A of the optical flat plate 6 is formed with a matte surface, which is referred to as a focus plate or a focusing screen.

光学平板6に形成された被写体像は、ペンタダハプリズム7で正立正像とされて接眼レンズ8を介し不図示の撮影者の瞳に導かれる。この場合、被写体像は、ファインダー内で表示される測距及び測光ポイントの位置を示す複数の反射プリズム群や四角形の枠を設けた表示部材としての光学平板6によって、ファインダー内で点や枠とともに撮影者に視認される。   The subject image formed on the optical flat plate 6 is made into an erect image by the penta roof prism 7 and guided to the photographer's pupil (not shown) via the eyepiece 8. In this case, the subject image is displayed together with the points and frames in the viewfinder by the optical plate 6 as a display member provided with a plurality of reflecting prism groups indicating the positions of the distance measurement and photometry points displayed in the viewfinder and the rectangular frame. Visible to the photographer.

また、撮影者が測距及び測光ポイントの位置を知ることができるのは、光学平板6の下面に設けられた反射プリズム群で反射した光が、被写体像と共にペンタダハプリズム7及び接眼レンズ8を介して撮影者の瞳へ導かれるためである。   The photographer can know the positions of the distance measurement and photometry points because the light reflected by the reflecting prism group provided on the lower surface of the optical flat plate 6 passes through the penta roof prism 7 and the eyepiece 8 together with the subject image. This is because it is guided to the photographer's eyes.

焦点検出領域で照明から照射される(反射した)光は、照明光源9から発せられた照明光であり、照明光は照明光学系10及びペンタダハプリズム7を介し、撮影光学系2の光軸を含む平面内で撮影視野の短辺方向から光学平板6を斜めに照射する経路を通る。なお、短辺方向とは、図1の左右方向、後述する図2の光学平板の上下方向及びファインダー視野内の上下方向である。   The light irradiated (reflected) from the illumination in the focus detection area is the illumination light emitted from the illumination light source 9, and the illumination light passes through the illumination optical system 10 and the penta roof prism 7 and the optical axis of the photographing optical system 2. It passes through a path in which the optical flat plate 6 is irradiated obliquely from the short-side direction of the field of view within the plane that includes it. The short side direction refers to the left-right direction in FIG. 1, the up-down direction of the optical flat plate in FIG. 2, which will be described later, and the up-down direction in the viewfinder field.

図2は、本発明に係る一実施形態におけるカメラ1の光学平板6の図である。   FIG. 2 is a diagram of the optical flat plate 6 of the camera 1 according to an embodiment of the present invention.

光学平板6は、左周辺領域21、右周辺領域22、その間に配置された中央領域23を有する。左周辺領域21には、指標としての枠線21c及び枠線21dで構成された枠21aが3箇所形成されている。また、右周辺領域22には指標としての枠線22c及び枠線22dで構成された枠22aも3箇所形成されている。各枠線は、被写体からの光や照明から照射される照明光を撮影者の目に導く方向に透過ならびに反射させないようにする。   The optical flat plate 6 has a left peripheral region 21, a right peripheral region 22, and a central region 23 disposed therebetween. The left peripheral region 21 is formed with three frames 21a each composed of a frame line 21c and a frame line 21d as indices. The right peripheral region 22 is also formed with three frames 22a each composed of a frame line 22c and a frame line 22d as indices. Each frame line prevents light from the subject and illumination light emitted from the illumination from being transmitted and reflected in a direction leading to the photographer's eyes.

さらに、中央領域23には指標としての枠線23c及び枠線23dで構成された枠23aが3箇所形成されている。したがって、枠21a、22a、23aは計で9箇所形成されている。また、指標として反射プリズム群21b、22b、23bが、光学平板6上で枠21a、22a、23aの反対側の表面に、かつ枠21a、22a、23aの中央に位置するように計9箇所形成されている。   Further, the central region 23 is formed with three frames 23a each composed of a frame line 23c and a frame line 23d as indices. Therefore, nine frames 21a, 22a, and 23a are formed in total. Further, a total of nine reflecting prism groups 21b, 22b, and 23b are formed on the optical flat plate 6 on the opposite surface of the frames 21a, 22a, and 23a and in the center of the frames 21a, 22a, and 23a as indexes. Has been.

図3は反射プリズムを示している。反射プリズム群21bは、図3(A)に示す、2方向に傾斜した斜面32及び33とそれぞれの斜面が接して形成される稜線34からなる反射プリズム31が、枠線21cに対し稜線34が角度α傾いて複数並べられて形成されている。   FIG. 3 shows a reflecting prism. In the reflecting prism group 21b, the reflecting prism 31 including the slopes 32 and 33 inclined in two directions shown in FIG. 3A and the ridge line 34 formed in contact with each of the slopes has a ridge line 34 with respect to the frame line 21c. A plurality of lines are arranged at an angle α.

一方で、反射プリズム群22bは、図3(A)に示す反射プリズム31が枠線22cに対し、反射プリズム群21bとは反対の向きに角度α傾いて複数並べられて形成されている。   On the other hand, the reflecting prism group 22b is formed by arranging a plurality of reflecting prisms 31 shown in FIG. 3A at an angle α with respect to the frame line 22c in the opposite direction to the reflecting prism group 21b.

反射プリズム群23bは、図3(B)に示す、2方向に傾斜した斜面36及び37とそれぞれの斜面が接して形成される稜線38からなる反射プリズム35が、枠線23cに対し稜線38が平行になるよう複数並べられて形成されている。   As shown in FIG. 3B, the reflecting prism group 23b includes a reflecting prism 35 composed of slopes 36 and 37 inclined in two directions and a ridge line 38 formed by contacting each slope, and a ridge line 38 with respect to the frame line 23c. A plurality are arranged side by side in parallel.

図4は、枠21a及び22aの部分拡大図であり、図2に示す光学平板6の表面6Aのマット面上に、斜面42及び斜面43とそれぞれの斜面が接して形成される稜線44で構成された断面がV字形の凸部41で形成される。   FIG. 4 is a partially enlarged view of the frames 21a and 22a, and is composed of a slope 42 and a slope 43 formed on the mat surface of the surface 6A of the optical flat plate 6 shown in FIG. The cross section formed is a V-shaped convex portion 41.

枠線21cの凸部41の稜線44は、反射プリズム31の稜線34と平行でないため、ファインダー上で被写体からレンズ及び光学平板6を介してくる光が凸部41の斜面42及び斜面43で曲がることにより撮影者の目に光が届かなく、撮影者は凸部41を黒い線状の指標として認識することができる。   Since the ridge line 44 of the convex portion 41 of the frame line 21 c is not parallel to the ridge line 34 of the reflecting prism 31, the light from the subject through the lens and the optical plate 6 bends on the slope 42 and the slope 43 of the convex portion 41 on the finder. Accordingly, light does not reach the photographer's eyes, and the photographer can recognize the convex portion 41 as a black linear index.

枠線22cの凸部41の稜線44も同様に、反射プリズム31の稜線34と平行でないため、ファインダー上で被写体からレンズ及び光学平板6を介してくる光が凸部41の斜面42及び斜面43で曲がることにより撮影者の目に光が届かなく、撮影者は凸部41を黒い線状の指標として認識することができる。   Similarly, the ridge line 44 of the convex portion 41 of the frame line 22c is not parallel to the ridge line 34 of the reflecting prism 31. Therefore, the light coming from the subject through the lens and the optical flat plate 6 on the finder has the slope 42 and the slope 43 of the convex portion 41. The light does not reach the photographer's eyes due to the bending, and the photographer can recognize the convex portion 41 as a black linear indicator.

一方、枠23a内に形成された反射プリズム群23bの反射プリズム35の稜線38は、枠線21c及び22cと平行である。そのため、枠線23cの形状が枠線21c及び22cのように図4に示すV字形の凸部がある一定の高さであるとき、被写体からの光が反射プリズム35の斜面36及び37で屈折して光学平板6内を通り、凸部41の斜面42及び43で屈折して、撮影者の目に届いてしまう。そして、枠線23cの反射プリズム35が形成されている範囲が、この現象により白く抜け、枠線23c内で枠線の濃淡に差がつき、枠線の鮮明性が劣る。   On the other hand, the ridge line 38 of the reflecting prism 35 of the reflecting prism group 23b formed in the frame 23a is parallel to the frame lines 21c and 22c. Therefore, when the shape of the frame line 23c is a certain height with a V-shaped convex portion shown in FIG. 4 like the frame lines 21c and 22c, the light from the subject is refracted by the inclined surfaces 36 and 37 of the reflecting prism 35. Then, the light passes through the optical flat plate 6 and is refracted by the inclined surfaces 42 and 43 of the convex portion 41 to reach the photographer's eyes. The range in which the reflecting prism 35 of the frame line 23c is formed is whitened due to this phenomenon, and there is a difference in the density of the frame line within the frame line 23c, and the sharpness of the frame line is inferior.

そこで、本発明の光学平板6は、枠23aの枠線23cの形状を、複数配列された円錐部と高さの低い凸部で構成する。これによって、撮影者がファインダーを覗いて枠線23cを見たとき、枠線23c内での濃淡の差がなくなり、視認性を向上させることができる。   Therefore, the optical flat plate 6 of the present invention is configured by a plurality of conical portions and convex portions having a low height, which are the shape of the frame line 23c of the frame 23a. As a result, when the photographer looks into the viewfinder and looks at the frame line 23c, there is no difference in shading within the frame line 23c, and visibility can be improved.

以下、枠線23c及び23dの詳細な構成を説明する。図5(A)は、枠線23c及び23dからなる枠23aの四隅の一部を示した平面図であり、図5(B)は図5(A)のA−A断面図である。枠線23cは、複数の円錐部51と、断面がV字形の凸部53及び54で形成されている。円錐部51は、枠線23cの幅寸法内に収まるように一定のピッチで複数形成されている。   Hereinafter, a detailed configuration of the frame lines 23c and 23d will be described. FIG. 5A is a plan view showing a part of the four corners of the frame 23a composed of the frame lines 23c and 23d, and FIG. 5B is a cross-sectional view taken along the line AA in FIG. 5A. The frame line 23c is formed by a plurality of conical portions 51 and convex portions 53 and 54 having a V-shaped cross section. A plurality of conical portions 51 are formed at a constant pitch so as to be within the width dimension of the frame line 23c.

また、凸部53及び54は、枠線23cの線幅内(幅寸法内)に収まるように円錐部51に対し左右両端(円錐部51の配列により構成された線の両側)に形成されている。また、凸部53及び54の高さは、図5(B)に示すように円錐部51の頂点52より低くなっている。これにより、枠線23cは反射プリズム35の稜線38と平行となる所定の高さの稜線を持たないこととなる。   Further, the convex portions 53 and 54 are formed on both left and right ends (both sides of a line constituted by the arrangement of the conical portions 51) so as to be within the line width (in the width dimension) of the frame line 23c. Yes. Moreover, the height of the convex parts 53 and 54 is lower than the vertex 52 of the cone part 51, as shown in FIG.5 (B). As a result, the frame line 23 c does not have a ridge line of a predetermined height that is parallel to the ridge line 38 of the reflecting prism 35.

一方、枠線23dは、図5(A)に示すように斜面56及び斜面57とそれぞれの斜面が接して形成される稜線58からなる断面がV字形の凸部55で形成されている。これは、枠線23dの凸部55の稜線58が、反射プリズム35の稜線38と平行でないためである。   On the other hand, as shown in FIG. 5A, the frame line 23d is formed by a convex portion 55 having a V-shaped cross section formed of a slope 56 and a slope 57 formed by contacting the slope 57 with each slope. This is because the ridge line 58 of the convex portion 55 of the frame line 23 d is not parallel to the ridge line 38 of the reflecting prism 35.

以上の結果、被写体からの光が枠線23cの円錐部51で曲がることにより撮影者の目に光が届くことがなくなり、撮影者は枠線23cを黒い線として認識することができる。   As a result, the light from the subject does not reach the photographer's eyes by bending at the conical portion 51 of the frame line 23c, and the photographer can recognize the frame line 23c as a black line.

次に、本発明に係るファインダー内の表示部材を成形するのに必要とする枠線を形成するための金型81(図8)の金型加工方法を図6、図7に基づいて説明する。図6は、金型81を製作する加工機61の模式図であり、(A)は平面図、(B)は正面図である。図7は、図6の加工機に使用される回転工具70の図であり、(A)は回転工具を先端側から見た図であり、(B)は正面図である。   Next, a die processing method of the die 81 (FIG. 8) for forming a frame line necessary for molding the display member in the finder according to the present invention will be described with reference to FIGS. . 6A and 6B are schematic views of the processing machine 61 that manufactures the mold 81, where FIG. 6A is a plan view and FIG. 6B is a front view. FIG. 7 is a view of the rotary tool 70 used in the processing machine of FIG. 6, (A) is a view of the rotary tool viewed from the front end side, and (B) is a front view.

加工機61は、XYスライダ65とZスライダ63との直交3方向の直進位置決め軸とB軸回転装置64とC軸回転装置66との2つの回転位置決め軸を有する5軸精密NC加工機である。   The processing machine 61 is a 5-axis precision NC processing machine having two rectilinear positioning axes of an XY slider 65 and a Z slider 63 in three orthogonal directions, a B-axis rotating device 64, and a C-axis rotating device 66. .

切削加工を行う回転工具70は、C軸回転装置66上に固定された回転スピンドル68に取付けられ、高速回転できるようになっている。また、金型81となる被加工物69は、B軸回転装置64に固定されている。   A rotary tool 70 that performs cutting is attached to a rotary spindle 68 fixed on a C-axis rotating device 66 so that it can rotate at a high speed. In addition, the workpiece 69 serving as the mold 81 is fixed to the B-axis rotating device 64.

図7に示す回転工具70は、回転スピンドル68(図6)に取付けられるシャンク部75と刃先部76とで形成されている。刃先部76の先端部には、単結晶ダイヤモンドから形成されたチップ77がロウ付けされて、刃先が形成されている。チップ77は、四角錐の形状に研磨されて4つの切れ刃稜線74が形成されている。4つの切れ刃稜線74は、四角錐の頂点を通る工具中心軸78に対して回転対称に形成されている。また、切れ刃稜線74と工具中心軸78とがなす頂角θは、凸部41、53、54、55、円錐部51の断面形状の先端角度の1/2に設定されている。   The rotary tool 70 shown in FIG. 7 is formed of a shank portion 75 and a blade edge portion 76 that are attached to a rotary spindle 68 (FIG. 6). A tip 77 made of single crystal diamond is brazed to the tip of the blade tip 76 to form a blade tip. The tip 77 is polished into a quadrangular pyramid shape to form four cutting edge ridge lines 74. The four cutting edge ridge lines 74 are formed rotationally symmetrically with respect to the tool center axis 78 passing through the apex of the quadrangular pyramid. Further, the apex angle θ formed by the cutting edge ridge line 74 and the tool center axis 78 is set to ½ of the tip angle of the cross-sectional shapes of the convex portions 41, 53, 54, 55 and the conical portion 51.

次に、加工機61及び回転工具70を使用して、光学平板6に形成する枠21a,22a及び23aを被加工物69に形成して金型81を製作する手順を説明する。   Next, a procedure for manufacturing the mold 81 by forming the frames 21a, 22a and 23a formed on the optical flat plate 6 on the workpiece 69 using the processing machine 61 and the rotary tool 70 will be described.

まず、被加工物69は、Z軸方向に向きを決められてB軸回転装置64に取り付けられる。   First, the workpiece 69 is attached to the B-axis rotating device 64 with its orientation determined in the Z-axis direction.

次に、回転工具70は、回転工具70の先端の四角錐の頂点71及び回転工具70の工具中心軸78が、回転スピンドル68の回転中心軸と一致するように、回転工具70の振れが調整されて回転スピンドル68に装着される。   Next, the runout of the rotary tool 70 is adjusted so that the apex 71 of the quadrangular pyramid at the tip of the rotary tool 70 and the tool center axis 78 of the rotary tool 70 coincide with the rotation center axis of the rotary spindle 68. And mounted on the rotary spindle 68.

以上の調整が行われた後、回転工具70を回転スピンドル68によって所定の回転数で回転させ、その頂点71を、X軸とZ軸を使用して枠線21c及び21dの凸部41の反転形状を加工できる位置に合わせる。次に、Y軸とZ軸を使用して、回転工具70の頂点71を走査させ、回転工具70によって、凸部41の凹状の反転形を被加工物69に形成する。枠線22c及び22dの凸部41、及び枠線23dの凸部55の反転形状も同様の方法で形成する。   After the above adjustment is performed, the rotary tool 70 is rotated at a predetermined rotational speed by the rotary spindle 68, and the apex 71 is inverted using the X axis and the Z axis to reverse the convex portions 41 of the frame lines 21c and 21d. Match the shape to a position where it can be processed. Next, the vertex 71 of the rotary tool 70 is scanned using the Y axis and the Z axis, and the concave inverted form of the convex portion 41 is formed on the workpiece 69 by the rotary tool 70. The inverted shapes of the convex portions 41 of the frame lines 22c and 22d and the convex portions 55 of the frame line 23d are also formed by the same method.

続いて、回転工具70の頂点71を枠線23cの反転形状を加工できる位置に合わせる。次に、回転工具70の頂点71をY軸方向(被加工物方向)に移動させ切込み、Y軸において逆方向に戻す。Y軸とZ軸を使用してこのことを繰り返し、所定のピッチ分離れた複数の円錐部51の反転形状を被加工物69に形成する。そして最後に、円錐部51の両側に、円錐部51の頂点52よりも浅い切込みで、凸部53及び54の反転形状を加工する。   Subsequently, the apex 71 of the rotary tool 70 is adjusted to a position where the inverted shape of the frame line 23c can be processed. Next, the apex 71 of the rotary tool 70 is moved in the Y-axis direction (workpiece direction) and cut to return to the opposite direction on the Y-axis. This is repeated using the Y axis and the Z axis, and the inverted shape of the plurality of conical portions 51 separated by a predetermined pitch is formed on the workpiece 69. Finally, the inverted shapes of the convex portions 53 and 54 are machined on both sides of the conical portion 51 with cuts shallower than the apex 52 of the conical portion 51.

このようにして、凸部41で構成された枠21a、22a,及び凸部53.54及び55と円錐部51で構成された枠23aの反転形状を形成する。この結果、被加工物69は、金型81となる。   In this manner, the inverted shape of the frame 21a composed of the convex portion 41 and the frame 23a composed of the convex portions 53.54 and 55 and the conical portion 51 is formed. As a result, the workpiece 69 becomes a mold 81.

このようにして、金型81は、1本の回転工具で連続して加工されるため、加工精度の向上と加工時間の短縮とが図られる。   In this way, since the mold 81 is continuously processed with one rotating tool, the processing accuracy can be improved and the processing time can be shortened.

次に、光学平板6の製造方法を説明する。図8は製造工程を示す簡略図である。   Next, a method for manufacturing the optical flat plate 6 will be described. FIG. 8 is a simplified diagram showing the manufacturing process.

まず、マット面を有する金型に前述した1本の回転工具70で、光学平板6の凸部41、53、54、55及び円錐部51の反転形状を前述した金型製作方法によって連続して刻み込み金型81を製作する。   First, the reversing shapes of the convex portions 41, 53, 54, and 55 and the conical portion 51 of the optical flat plate 6 are continuously applied to the mold having the mat surface by the above-described mold manufacturing method. The engraving die 81 is manufactured.

次に、フレネル面を有する金型に、光学平板6の反射プリズム31及び35の反転形状を刻み込み金型82を製作する。   Next, a mold 82 having a Fresnel surface is formed by engraving the inverted shapes of the reflecting prisms 31 and 35 of the optical flat plate 6.

続いて、図8(C)に示すように製作した金型81及び82を用いて射出成形などによりプラスチック成形を行う。   Subsequently, plastic molding is performed by injection molding or the like using the molds 81 and 82 manufactured as shown in FIG.

最後に、図8(D)に示すように、金型81及び82からプラスチック成形品83を分離する。分離したプラスチック成形品83は、枠21a、22a、23a及び反射プリズム群21b、22b、23bが形成された光学平板6となる。これによって、光学平板6が成形が完了する。   Finally, as shown in FIG. 8D, the plastic molded product 83 is separated from the molds 81 and 82. The separated plastic molded product 83 becomes the optical flat plate 6 on which the frames 21a, 22a, 23a and the reflecting prism groups 21b, 22b, 23b are formed. Thereby, the optical flat plate 6 is completely formed.

上述の本実施形態で製作されたファインダー内に設けられる表示部材である光学平板6の枠線の形状や大きさは以下の通りである。   The shape and size of the frame line of the optical flat plate 6 which is a display member provided in the finder manufactured in the above-described embodiment are as follows.

表1は光学平板6の枠線の各寸法を示す。枠線は、複数の円錐部と凸部で形成されている。円錐部は、枠線の幅寸法30mm内に収まるように複数形成されている。また、凸部は、枠線の幅寸法30mm内に収まるように円錐部に対し左右に形成されている。   Table 1 shows the dimensions of the frame line of the optical flat plate 6. The frame line is formed of a plurality of conical portions and convex portions. A plurality of conical portions are formed so as to be within the width dimension 30 mm of the frame line. Moreover, the convex part is formed in the right and left with respect to the conical part so that it may be settled in the width dimension 30mm of a frame line.

Figure 2016081001
Figure 2016081001

以上の方法により製造された成形である光学平板6の枠線は、従来のような色の濃淡の差がなく、良好な視認性を得ることができた。   The frame line of the optical flat plate 6 formed by the above method had no difference in color shade as in the prior art, and good visibility could be obtained.

以上説明した実施態様では、回転工具70の刃先部76の先端に設けたチップ77は四角錐の形状に研磨されているが、三角錐などその他の角錐形状でも良い。   In the embodiment described above, the tip 77 provided at the tip of the cutting edge portion 76 of the rotary tool 70 is polished into a quadrangular pyramid shape, but may be another pyramid shape such as a triangular pyramid.

1:一眼レフカメラ
6:光学平板(ファインダー内に設けられる表示部材)
21:左周辺領域
22:右周辺領域
23:中央領域
21a、22a、23a:枠
21b、22b、23b:反射プリズム群
21c、21d、22c、22d、23c、23d:枠線
31、35:反射プリズム
34、38:稜線
41:凸部
51:円錐部
52:頂点
53、54、55:凸部
61:加工機
70:回転工具
71:頂点
81:金型
82:金型
83:成形品
1: SLR camera 6: Optical flat plate (display member provided in the viewfinder)
21: Left peripheral region 22: Right peripheral region 23: Central regions 21a, 22a, 23a: Frames 21b, 22b, 23b: Reflective prism groups 21c, 21d, 22c, 22d, 23c, 23d: Frame lines 31, 35: Reflective prisms 34, 38: Ridge line 41: Convex part 51: Conical part 52: Vertex 53, 54, 55: Convex part 61: Processing machine 70: Rotating tool 71: Vertex 81: Mold 82: Mold 83: Molded product

Claims (4)

焦点検出領域で照明から照射される照明光を反射して撮影者の目に導くための複数の反射プリズムからなる反射プリズム群と、被写体からの光や照明から照射される照明光を撮影者の目に導く方向に透過ならびに反射させないように前記反射プリズム群を囲うように形成された枠線とを有する、カメラのファインダー内に設けられる表示部材において、
前記枠線の線幅内に複数の円錐部が配列され、かつ、前記円錐部の配列により構成された線の両側において前記線幅内に前記円錐部より低い凸部が配列されていることを特徴とする表示部材。
A reflecting prism group composed of a plurality of reflecting prisms for reflecting the illumination light emitted from the illumination in the focus detection area and guiding it to the photographer's eyes, and the illumination light emitted from the subject and illumination from the subject. In a display member provided in the finder of the camera, having a frame line formed so as to surround the reflecting prism group so as not to transmit and reflect in the direction leading to the eyes,
A plurality of conical portions are arranged within the line width of the frame line, and convex portions lower than the conical portions are arranged within the line width on both sides of the line constituted by the arrangement of the conical portions. A characteristic display member.
前記表示部材は、前記ファインダー内に設けられる光学平板であることを特徴とする請求項1に記載の表示部材。   The display member according to claim 1, wherein the display member is an optical flat plate provided in the viewfinder. 請求項1に記載の表示部材の枠線の金型加工方法であって、被加工物に前記枠線を形成する円錐部及び凸部を凹状に反転させた形状を形成するため、前記被加工物に角錐形の工具を回転させて切削加工する、
ことを特徴とする表示部材の枠線の金型加工方法。
2. A method of processing a frame of a display member according to claim 1, wherein the workpiece is formed to have a shape obtained by inverting the conical portion and the convex portion forming the frame line into a concave shape. Rotate and cut a pyramid-shaped tool
A method for processing a frame of a frame of a display member.
請求項1に記載の表示部材をファインダー光学系に配置したカメラ。   A camera in which the display member according to claim 1 is arranged in a finder optical system.
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JP2014215225A JP6410556B2 (en) 2014-10-22 2014-10-22 Display member provided in viewfinder, frame processing method for frame of display member, and camera using display member
US14/881,296 US9442345B2 (en) 2014-10-22 2015-10-13 Camera having a display member
CN201510679968.6A CN105549298B (en) 2014-10-22 2015-10-19 Camera with display unit

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