JPH09274221A - Roof type reflection mirror and single-lens reflex camera using the same as well as metal mold for forming roof type reflection mirror - Google Patents
Roof type reflection mirror and single-lens reflex camera using the same as well as metal mold for forming roof type reflection mirrorInfo
- Publication number
- JPH09274221A JPH09274221A JP8082735A JP8273596A JPH09274221A JP H09274221 A JPH09274221 A JP H09274221A JP 8082735 A JP8082735 A JP 8082735A JP 8273596 A JP8273596 A JP 8273596A JP H09274221 A JPH09274221 A JP H09274221A
- Authority
- JP
- Japan
- Prior art keywords
- roof
- side wall
- reflecting mirror
- wall portion
- reflex camera
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Viewfinders (AREA)
- Optical Elements Other Than Lenses (AREA)
- Cameras In General (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、一眼レフレックス
カメラのファインダ光学系に用いる屋根型反射鏡に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roof reflector used in a viewfinder optical system of a single-lens reflex camera.
【０００２】[0002]
【従来の技術】一眼レフレックスカメラの光学系におい
て、ペンタプリズムに代えてミラーを組み合わせた所謂
「屋根型反射鏡」を用いることが公知である（例えば、
実公平６−１８３４３号公報）。この屋根型反射鏡１０
は、図８に示すように、直角に交差した２つの反射面１
Ａ，１Ｂからなるダハ部１と、２つの反射面１Ａ，１Ｂ
に各々連なる２つの側壁部２，３とを備えており、該側
壁部２，３は、ダハ面１とモールド成形にて一体的に形
成される。2. Description of the Related Art It is known to use a so-called "roof type reflecting mirror" in which a mirror is combined in place of a pentaprism in an optical system of a single-lens reflex camera (for example,
Japanese Utility Model Publication No. 6-18343). This roof type reflector 10
Shows two reflecting surfaces 1 intersecting at right angles, as shown in FIG.
A roof part 1 composed of A and 1B and two reflecting surfaces 1A and 1B
Is provided with two side wall portions 2 and 3 which are respectively continuous with each other, and the side wall portions 2 and 3 are integrally formed with the roof surface 1 by molding.
【０００３】そして、上記実公昭６−１８３４３号公報
に記載の屋根型反射鏡１０は、２つの側壁部２，３をカ
メラの焦点板（図示省略）に平行な面Ｘとなす角度が８
０度乃至８９度となるように外側に広げられている。In the roof type reflecting mirror 10 described in Japanese Utility Model Publication No. 6-18343, the angle between the two side wall portions 2 and 3 and the plane X parallel to the focusing screen (not shown) of the camera is 8 degrees.
It is widened to the outside from 0 to 89 degrees.
【０００４】このような形状とする理由は、第１には、
ファインダー内に至った光が側壁部２，３で反射しない
ようにしてゴーストが生じるのを防ぐためであり、第２
には、側壁部２，３を共に外側に押し広げることによっ
てモールド成形時の抜き勾配γを確保するためである。The reason for such a shape is as follows.
This is to prevent ghosts from occurring by preventing the light reaching the inside of the finder from being reflected by the side wall portions 2 and 3.
In order to secure the draft γ at the time of molding, the side walls 2 and 3 are both spread outward.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記従
来の屋根型反射鏡１０のように、２つの側壁部２，３を
焦点板と平行な面Ｘに対して共に８０度乃至８９度で交
わらせた場合、以下のような不具合が生じる。However, like the above-mentioned conventional roof type reflecting mirror 10, the two side wall portions 2 and 3 are made to intersect each other at an angle of 80 to 89 degrees with respect to the plane X parallel to the focusing screen. If this happens, the following problems will occur.
【０００６】即ち、一眼レフレックスカメラにおいて、
屋根型反射鏡１０が取り付けられる収納部は、その近傍
に多数の制御機器（例えば、ミラー駆動機構、スイッチ
部、液晶表示部等）が配置されており、従って、上記の
ように、側壁部２，３が外側に余分に広げられた形状の
屋根型反射鏡１０を、当該一眼レフレックスカメラに取
り付けるためには、収納部を大きくしなければならず、
その分カメラ全体が大型化すると云う不具合がある。That is, in a single-lens reflex camera,
A large number of control devices (for example, a mirror drive mechanism, a switch unit, a liquid crystal display unit, etc.) are arranged in the vicinity of the storage unit to which the roof reflecting mirror 10 is attached. Therefore, as described above, the side wall unit 2 is provided. In order to attach the roof-type reflecting mirror 10 in which 3 and 3 are expanded to the outside to the single-lens reflex camera, it is necessary to enlarge the storage section.
There is a problem that the entire camera becomes larger accordingly.
【０００７】本発明は、かかる事情に鑑みてなされたも
ので、成形時の抜き勾配を十分に確保しつつ一眼レフレ
ックスカメラを大型化することなく取り付けることがで
きる屋根型反射鏡及びこれが用いられた一眼レフレック
スカメラ並びに当該屋根型反射鏡を成形するための屋根
型反射鏡用金型を提供することを目的とする。The present invention has been made in view of the above circumstances, and a roof-type reflecting mirror to which a single-lens reflex camera can be attached without increasing the size while ensuring a sufficient draft at the time of molding and the same are used. Another object of the present invention is to provide a single-lens reflex camera and a roof reflecting mirror mold for molding the roof reflecting mirror.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するた
め、請求項１の発明は、直角に交差した２つの反射面か
らなるダハ部と、該反射面に各々連なりカメラ本体側の
焦点板に平行な面となす角度が略９０度となる第１側壁
部及び第２側壁部がモールド成形により一体的に成形さ
れた一眼レフレックスカメラのファインダに用いられる
屋根型反射鏡において、少なくとも上記第１側壁部を、
その底部を外側に広げ、第１側壁部と第２側壁部が互い
になす角度を所定角度以上となるように形成し、その正
面形状が、上記ダハ部の稜線を通過し当該焦点板に垂直
に交わる面に関して非対称となるように形成したもので
ある。In order to achieve the above-mentioned object, the invention of claim 1 has a roof portion composed of two reflecting surfaces intersecting at a right angle, and a focusing plate on the camera body side connected to the reflecting portions. A roof-type reflecting mirror used in a viewfinder of a single-lens reflex camera in which a first side wall portion and a second side wall portion that form an angle of approximately 90 degrees with a parallel surface are integrally formed by molding. Side wall,
The bottom portion is expanded outward, and the first side wall portion and the second side wall portion are formed so as to form an angle greater than or equal to a predetermined angle, and the front shape passes through the ridge line of the roof portion and is perpendicular to the focusing screen. It is formed so as to be asymmetric with respect to the intersecting surface.
【０００９】又、請求項２の発明は、上記所定角度を、
モールド成形時に必要な抜き勾配の２倍の角度にしたも
のである。又、請求項３の発明は、上記第１側壁部と第
２側壁部の内壁面を拡散面とし、上記所定角度を略１０
度にしたものである。又、請求項４の発明は、上記第１
側壁部と第２側壁部の内壁面を光沢面とし、上記所定角
度を略４度にしたものである。According to a second aspect of the invention, the predetermined angle is
The angle is twice the draft required at the time of molding. According to the invention of claim 3, the inner wall surfaces of the first side wall portion and the second side wall portion are diffusion surfaces, and the predetermined angle is approximately 10
It is a degree. The invention of claim 4 is the first aspect of the invention.
The inner wall surfaces of the side wall portion and the second side wall portion are glossy surfaces, and the predetermined angle is approximately 4 degrees.
【００１０】又、請求項５の発明は、請求項１から請求
項４の何れかに記載の屋根型反射鏡が用いられた一眼レ
フレックスカメラにおいて、一眼レフレックスカメラ本
体の屋根型反射鏡が収納される収納部の左右何れか一方
に補助収納部を設け、上記屋根型反射鏡を、第１側壁部
が上記補助収納部内に突出するように配置したものであ
る。Further, the invention of claim 5 is a single-lens reflex camera using the roof-type reflecting mirror according to any one of claims 1 to 4, wherein the roof-type reflecting mirror of the single-lens reflex camera body is An auxiliary storage section is provided on either the left or right side of the storage section to be stored, and the roof-type reflecting mirror is arranged so that the first side wall section projects into the auxiliary storage section.
【００１１】又、請求項６の発明は、上記屋根型反射鏡
の第１側壁部の底部を、上記補助収納部の形状に沿って
外側に広げたものである。又、請求項７の発明は、上記
補助収納部を、ミラー駆動機構の反対側に形成したもの
である。又、請求項８の発明は、上記屋根型反射鏡を成
形する屋根型反射鏡用金型を、上記第１及び第２側壁部
に対応する雄型金型の２つの壁面を、各々の壁面が抜き
方向に対して同一の角度で交わるように形成したもので
ある。According to a sixth aspect of the present invention, the bottom portion of the first side wall portion of the roof reflecting mirror is expanded outward along the shape of the auxiliary storage portion. According to the invention of claim 7, the auxiliary storage portion is formed on the opposite side of the mirror driving mechanism. Further, the invention of claim 8 is a mold for a roof-type reflecting mirror for molding the above-mentioned roof-type reflecting mirror, wherein two wall surfaces of a male mold corresponding to the first and second side wall portions are provided respectively. Are formed so as to intersect at the same angle with respect to the drawing direction.
【００１２】（作用）一般的に、一眼レフレックスカメ
ラでは、屋根型反射鏡を取り付ける収納部の左右は、何
れか一方が他方よりスペース的に余裕のある非対称とな
っているため、請求項１の発明によれば、屋根型反射鏡
の成形時にその抜き方向に対し第１側壁部と第２側壁部
と各々所定角度以上で傾けて左右均等な抜き勾配を確保
しつつ、一眼レフレックスカメラへの取り付け時には、
当該カメラの収納部の左右何れか一方に生じている広め
のスペースに上記第１側壁部側を突出させれば、カメラ
の収納部全体を大きくすることなく、側壁が広げられた
屋根型反射鏡を取り付けることができる。(Operation) Generally, in a single-lens reflex camera, one of the left and right sides of the housing portion to which the roof-type reflecting mirror is attached is asymmetrical with more space than the other. According to the invention, when the roof type reflecting mirror is molded, the first side wall portion and the second side wall portion are inclined at a predetermined angle or more with respect to the pulling direction to ensure a uniform draft angle on the left and right, and the single lens reflex camera is provided. When installing
If the first side wall portion is projected into a wide space formed on either the left or right side of the camera storage portion, the side wall is expanded without increasing the size of the camera storage portion. Can be attached.
【００１３】又、請求項２の発明によれば、第１側壁部
と第２側壁部に、モールド成形時に必要な抜き勾配を確
保でき、抜き加工が容易になる。又、請求項３の発明に
よれば、屋根型反射鏡におけるゴースト対策のために、
第１側壁部と第２側壁部の内壁に拡散面を形成した場合
でも、モールド成形時に必要な抜き勾配を確保できるの
で、その抜き加工が容易になる。According to the second aspect of the present invention, the first side wall portion and the second side wall portion can secure a draft necessary for molding, and the punching process is facilitated. Further, according to the invention of claim 3, as a countermeasure against ghost in the roof-type reflecting mirror,
Even when the diffusion surfaces are formed on the inner walls of the first side wall portion and the second side wall portion, the necessary draft can be secured at the time of molding, which facilitates the punching process.
【００１４】又、請求項４の発明によれば、屋根型反射
鏡の第１側壁部と第２側壁部の内壁が光沢面のとき、抜
き勾配を小さくして、当該屋根型反射鏡の取り付けに必
要な補助収納部を小さくできる。又、請求項５の発明に
よれば、一眼レフレックスカメラの屋根型反射鏡の収納
部の何れか一方にのみ補助収納部用のスペースがあれ
ば、当該屋根型反射鏡の取り付けが容易にできる。According to the invention of claim 4, when the inner walls of the first side wall and the second side wall of the roof reflecting mirror are glossy surfaces, the draft is reduced to mount the roof reflecting mirror. The auxiliary storage space required for can be made smaller. Further, according to the invention of claim 5, if there is a space for the auxiliary storage portion in only one of the storage portions of the roof type reflecting mirror of the single-lens reflex camera, the roof type reflecting mirror can be easily attached. .
【００１５】又、請求項６の発明によれば、補助収納部
を最大限有効に利用して、第１側壁部の底部を外側に広
げられるので、モールド成形時の抜き勾配の設定に余裕
をもたせることができる。又、請求項７の発明によれ
ば、ミラー駆動機構が屋根型反射鏡の収納部の近傍にあ
っても、当該一眼レフレックスカメラを大型化すること
なく、当該屋根型反射鏡を容易に取り付けられる。Also, according to the invention of claim 6, the bottom portion of the first side wall portion can be expanded to the outside by making the most effective use of the auxiliary storage portion, so that there is a margin in setting the draft at the time of molding. Can be held. Further, according to the invention of claim 7, even if the mirror drive mechanism is in the vicinity of the housing portion of the roof type reflection mirror, the roof type reflection mirror can be easily attached without increasing the size of the single-lens reflex camera. To be
【００１６】又、請求項８の発明によれば、正面形状が
左右非対称の屋根型反射鏡であっても、屋根型反射鏡の
成形時に当該第１、第２側壁部を抜き方向に対して同一
の抜き勾配にて交わらせることができるため、抜き加工
が容易になる。Further, according to the invention of claim 8, even when the roof-shaped reflecting mirror whose front shape is asymmetrical to the left and right, the first and second side wall portions are removed with respect to the pulling direction when the roof-shaped reflecting mirror is molded. Since they can intersect at the same draft, the punching process becomes easy.
【００１７】[0017]
【発明の実施の形態】以下、本発明の実施形態につい
て、添付図面を参照して説明する。尚、この第１の実施
形態は、請求項１から請求項３、請求項５、請求項７及
び請求項８に対応する。図１は屋根型反射鏡２０の側面
形状及び正面形状を示す説明図、図２は屋根型反射鏡２
０の斜視図、図３は屋根型反射鏡２０が取り付けられた
一眼レフレックスカメラ１００の内部構成の概略を示す
正面図、図４は屋根型反射鏡用金型４０を示す断面図、
図５は図４のＶ−Ｖ線に沿った断面図、図６は屋根型反
射鏡２０を成形した後に屋根型反射鏡金型４０の雌型金
型４１を外した状態を示す説明図、図７は雄型金型４５
から屋根型反射鏡２０を外した状態を示す説明図であ
る。Embodiments of the present invention will be described below with reference to the accompanying drawings. The first embodiment corresponds to claims 1 to 3, claim 5, claim 7, and claim 8. FIG. 1 is an explanatory view showing a side surface shape and a front surface shape of a roof type reflecting mirror 20, and FIG. 2 is a roof type reflecting mirror 2.
0 is a perspective view, FIG. 3 is a front view showing the outline of the internal configuration of the single-lens reflex camera 100 to which the roof-type reflecting mirror 20 is attached, and FIG. 4 is a cross-sectional view showing the roof-type reflecting mirror mold 40.
5 is a cross-sectional view taken along the line VV of FIG. 4, and FIG. 6 is an explanatory view showing a state in which the female mold 41 of the roof-type reflecting mirror mold 40 is removed after the roof-type reflecting mirror 20 is molded, FIG. 7 shows a male die 45
It is explanatory drawing which shows the state which removed the roof-type reflecting mirror 20 from FIG.
【００１８】先ず、屋根型反射鏡２０の形状について説
明する。屋根型反射鏡２０は、一眼レフレックスカメラ
１００のファインダに用いられるもので、図１及び図２
に示すように、互いに直角に交差した２つの反射面２１
Ａ，２１Ｂからなるダハ部２１と、反射面２１Ａ，２１
Ｂに各々連なる第１側壁部２２及び第２側壁部２３と、
ダハ部２１を前面から覆う前面部２４とからなるもの
で、これらは、後述の屋根型反射鏡用金型４０（図４，
図５）によるモールド成形によって一体に形成される。
尚、屋根型反射鏡２０の前面部２４の下方には、別途成
形された前方反射面２５が、一眼レフレックスカメラ１
００への取り付け時に図１の一点鎖線で示す位置に取り
付けられる。First, the shape of the roof reflecting mirror 20 will be described. The roof type reflecting mirror 20 is used for a viewfinder of the single-lens reflex camera 100, and is shown in FIGS.
, Two reflective surfaces 21 intersecting each other at right angles
A roof portion 21 made of A and 21B and reflecting surfaces 21A and 21
A first side wall portion 22 and a second side wall portion 23 which are respectively connected to B,
And a front surface portion 24 that covers the roof portion 21 from the front surface.
It is integrally formed by molding according to FIG. 5).
A separately formed front reflecting surface 25 is provided below the front surface portion 24 of the roof-type reflecting mirror 20 in the single-lens reflex camera 1.
It is attached at the position shown by the alternate long and short dash line in FIG.
【００１９】上記屋根型反射鏡２０の第１側壁部２２
は、その底部２２Ａが外側（図１中右側）に広げられ
て、当該第１側壁部２２と第２側壁部２３とのなす角が
角度αとなっている。又、上記第１側壁部２２，第２側
壁部２３の内壁面２２Ｂ，２３Ｂは、屋根型反射鏡２０
内に入射した光が当該内壁面２２Ｂ，２３Ｂで反射しな
いよう、その表面に凹凸が形成された拡散面となってお
り、この場合には、上記角度αは、後述する屋根型反射
鏡２０の成形時の抜き加工において必要な抜き勾配β1
（例えば、５度）の２倍の角度（１０度）若しくはそれ
以上に設定される。尚、角度αが、上記必要な抜き勾配
β1の２倍若しくはそれ以上に設定されると、詳細は後
述するように、屋根型反射鏡２０の成形時には、実際の
抜き勾配β（＝α／２）が、上記必要な抜き勾配β1と
同じ角度若しくはそれ以上の角度になる。The first side wall portion 22 of the roof type reflecting mirror 20.
Has its bottom portion 22A spread outward (to the right in FIG. 1), and the angle formed by the first side wall portion 22 and the second side wall portion 23 is an angle α. In addition, the inner wall surfaces 22B and 23B of the first side wall portion 22 and the second side wall portion 23 are the roof type reflecting mirror 20.
In order to prevent the light incident on the inside from being reflected by the inner wall surfaces 22B and 23B, it is a diffusing surface having irregularities formed on its surface. In this case, the angle α is equal to that of the roof reflecting mirror 20 described later. Draft slope β1 required for punching during molding
The angle is set to be twice (for example, 5 degrees) (10 degrees) or more. When the angle α is set to be twice the necessary draft β1 or more, the actual draft β (= α / 2) will be used when the roof reflecting mirror 20 is molded, as will be described later in detail. ) Becomes the same angle as the required draft β1 or more.
【００２０】互いになす角度が角度αとなる２つの側壁
部２２，２３のうち、第１側壁部２２は、焦点板１０１
に平行な面Ｘに垂直で且つ稜線Ｚと交わる面Ｙと角度α
で交わり、上記第２側壁部２３は上記面Ｙに平行（面Ｘ
とは略直角）となり、屋根型反射鏡２０は、その正面形
状が、面Ｙに対して左右非対称になる（図１）。次に、
このように左右非対称に形成された屋根型反射鏡２０の
一眼レフレックスカメラ１００への取り付けについて、
図３を用いて説明する。Of the two side wall portions 22 and 23 whose angle is α, the first side wall portion 22 is the focusing screen 101.
An angle α with the plane Y that is perpendicular to the plane X parallel to
And the second side wall 23 is parallel to the plane Y (plane X
And the roof-shaped reflecting mirror 20 has a front shape that is asymmetrical with respect to the plane Y (FIG. 1). next,
Regarding the attachment of the roof-type reflecting mirror 20 formed asymmetrically to the single-lens reflex camera 100 as described above,
This will be described with reference to FIG.
【００２１】屋根型反射鏡２０は、一眼レフレックスカ
メラ１００の中央やや右寄り位置に設けられる収納部１
０３に取り付けられる。この収納部１０３の一方の側
（図示例では、左側）には、ミラー駆動機構１０２が設
けられ、その反対側（収納部１０３の右側）の比較的自
由度の高いスペースに補助収納部１０４が設けられてい
る。The roof reflecting mirror 20 is a storage unit 1 provided at a position slightly rightward of the center of the single-lens reflex camera 100.
It is attached to 03. The mirror drive mechanism 102 is provided on one side (left side in the illustrated example) of the storage section 103, and the auxiliary storage section 104 is provided in a space having a relatively high degree of freedom on the opposite side (right side of the storage section 103). It is provided.
【００２２】而して、上記した左右非対称の屋根型反射
鏡２０は、外側に広げられた第１側壁部２２がこの補助
収納部１０４に突出した状態で、当該収納部１０３に取
り付けられる。このように収納部１０３に隣接して補助
収納部１０４を設けておくことによって、上記必要な抜
き勾配β1を確保するために第１側壁部２２を角度αで
外側に押し広げて屋根型反射鏡２０の外形が大きくなっ
ても、大きくなった分が、元々自由なスペースであった
補助収納部１０４に収納されるため、収納部１０３につ
いてはこれを大きくする必要がなくなり、従って一眼レ
フレックスカメラ１００全体が大型化することがなくな
る。The above-mentioned left-right asymmetric roof type reflecting mirror 20 is attached to the accommodating portion 103 in a state in which the first side wall portion 22 expanded outward is projected into the auxiliary accommodating portion 104. By providing the auxiliary storage portion 104 adjacent to the storage portion 103 in this manner, the first side wall portion 22 is spread outward at an angle α to secure the necessary draft β1 and the roof-type reflecting mirror is provided. Even if the outer shape of 20 is increased, the increased amount is stored in the auxiliary storage unit 104, which was originally a free space, so that there is no need to increase the size of the storage unit 103, and therefore, the single-lens reflex camera. The entire 100 does not become large.
【００２３】尚、図３中、１０５はスイッチ部、１０６
はスプール室、１０７は給送用モータ、１０８は減速機
構、１０９は焦点調節用モータ、１１０は焦点調節装
置、１１２は電池、１１３は絞り制御機構、１１４はコ
マンドダイヤル、１１５はレリーズ釦、１１６は内蔵ス
トロボ用コンデンサ、１１７は液晶表示器、１１８はマ
イコンである。In FIG. 3, reference numeral 105 denotes a switch section, 106
Is a spool chamber, 107 is a feeding motor, 108 is a deceleration mechanism, 109 is a focus adjusting motor, 110 is a focus adjusting device, 112 is a battery, 113 is an aperture control mechanism, 114 is a command dial, 115 is a release button, 116 Is a built-in flash capacitor, 117 is a liquid crystal display, and 118 is a microcomputer.
【００２４】次に、上記屋根型反射鏡２０を成形する屋
根型反射鏡用金型４０について説明する。屋根型反射鏡
用金型４０は、屋根型反射鏡２０のダハ部２１、第１，
第２側壁部２２，２３及び前面部２４を一体に形成する
ための金型であり、図４、図５に示す形状の雌型金型４
１と雄型金型４５とからなり、これら雌型金型４１と雄
型金型４５との間のキャビティ４０Ａが屋根型反射鏡２
０の外形を決定する。Next, a roof-type reflecting mirror mold 40 for molding the roof-type reflecting mirror 20 will be described. The roof-type reflecting mirror mold 40 includes the roof portion 21 of the roof-type reflecting mirror 20,
It is a mold for integrally forming the second side wall parts 22, 23 and the front face part 24, and is a female mold 4 having a shape shown in FIGS. 4 and 5.
1 and a male mold 45, and the cavity 40A between the female mold 41 and the male mold 45 is a roof-type reflecting mirror 2
Determine the outline of 0.
【００２５】この屋根型反射鏡用金型４０では、図４、
図５に示す型閉め状態で、図５のゲート部４２から、溶
融した状態のポリカーボネート等の合成樹脂を、当該キ
ャビティ４０Ａ内に射出し、これを冷却して図１から図
３に示す形状の屋根型反射鏡２０を成形するものであ
る。そして冷却後、図６に示すように、先ず、雌型金型
４１を図中上方に移動させ、次いで、図７に示すように
雌型金型４５より押出機構（図示省略）を用いて、当該
成形された屋根型反射鏡２０を押し出す。In this roof reflecting mirror mold 40, as shown in FIG.
In the mold closed state shown in FIG. 5, synthetic resin such as polycarbonate in a molten state is injected from the gate portion 42 of FIG. 5 into the cavity 40A and cooled to obtain the shape shown in FIGS. The roof reflecting mirror 20 is formed. Then, after cooling, as shown in FIG. 6, first, the female die 41 is moved upward in the figure, and then, as shown in FIG. The molded roof reflector 20 is pushed out.
【００２６】ところで、この屋根型反射鏡用金型４０に
あっては、抜き加工のために上記第１，第２側壁部２
２，２３に対応する雄型金型４５側の２つの壁面４５
Ａ，４５Ｂを、各々の壁面４５Ａ，４５Ｂが抜き方向
（図４中矢印で示す方向）に対して同一の抜き勾配β
（＝α／２）となるようにしなければならない。このた
めキャビティ４０Ａは、屋根型反射鏡用金型４０の仮想
面Ｙ’（面Ｙに相当）が、抜き方向（図４中矢印方向）
に対して角度βで交わるよう設計される。By the way, in the roof-type reflecting mirror mold 40, the first and second side wall portions 2 are formed for punching.
Two wall surfaces 45 on the male mold 45 side corresponding to 2, 23
A and 45B have the same draft β for the respective wall surfaces 45A and 45B with respect to the drafting direction (the direction shown by the arrow in FIG. 4).
(= Α / 2) must be satisfied. Therefore, in the cavity 40A, the virtual surface Y ′ (corresponding to the surface Y) of the roof-type reflecting mirror mold 40 is in the pulling direction (the arrow direction in FIG. 4)
Is designed to intersect at an angle β with respect to.
【００２７】この場合、上記雄型金型４５からの抜き加
工に最低限必要な抜き勾配β1は、上記した通り、第１
側壁部２２，第２側壁部２３の内壁面２２Ｂ，２３Ｂが
拡散面となっている場合には、当該拡散面に応じた所定
の角度（例えば５度）となる。而して、このとき角度α
（＝２β）は、上記必要な抜き勾配β1の２倍（１０
度）若しくはそれ以上に設定される。In this case, the minimum draft β1 required for punching from the male die 45 is the first draft as described above.
When the inner wall surfaces 22B and 23B of the side wall portion 22 and the second side wall portion 23 are diffusion surfaces, a predetermined angle (for example, 5 degrees) corresponding to the diffusion surfaces is formed. Then, at this time, the angle α
(= 2β) is twice the required draft β1 (10
Degree) or higher.
【００２８】以上説明したように、本実施形態の屋根型
反射鏡２０は、第１側壁部２２と第２側壁部２３とがな
す角度αを、当該屋根型反射鏡２０の成形時に最低限必
要な抜き勾配β1の２倍若しくはそれ以上とし、第１側
壁部２２と面Ｙとがなす角度を角度αとしたので、一眼
レフレックスカメラ１００の収納部１０３に隣接して設
けられた補助収納部１０４に上記第１側壁部２２を突出
するようにして、屋根型反射鏡２０をその収納部１０３
に取り付けることで、一眼レフレックスカメラ１００本
体を大型化することなく屋根型反射鏡２０の取り付けが
行える。As described above, in the roof reflecting mirror 20 of this embodiment, the angle α formed by the first side wall portion 22 and the second side wall portion 23 is the minimum required when the roof reflecting mirror 20 is formed. Since the draft angle β1 is twice or more, and the angle between the first side wall portion 22 and the surface Y is set to the angle α, the auxiliary storage portion provided adjacent to the storage portion 103 of the single-lens reflex camera 100. The roof side reflecting mirror 20 is attached to the housing portion 103 by projecting the first side wall portion 22 into the housing 104.
The roof-type reflecting mirror 20 can be attached without increasing the size of the main body of the single-lens reflex camera 100.
【００２９】又、左右非対称の屋根型反射鏡２０を成形
する際に、屋根型反射鏡用金型４０のキャビティ４０Ａ
を、その仮想面Ｙ’をβ（α／２）傾けた形状として、
その抜き方向に対して、第１側壁部２２と第２側壁部２
３に対応する壁面４５Ａ，４５Ｂに、必要な抜き勾配β
1若しくはそれ以上の抜き勾配βを、同一の角度にて付
けられるので、抜き加工が容易になる。Further, when molding the asymmetrical roof type reflecting mirror 20, the cavity 40A of the roof type reflecting mirror mold 40 is formed.
As a shape obtained by inclining the virtual surface Y ′ by β (α / 2),
The first side wall 22 and the second side wall 2 with respect to the pulling direction.
The required draft β on the wall surfaces 45A and 45B corresponding to 3
Since one or more drafts β can be attached at the same angle, the punching process becomes easy.
【００３０】尚、上記した実施形態では、上記第１側壁
部２２Ａ，第２側壁部２２Ｂの内壁面２２Ｂ，２３Ｂが
拡散面とされて、最低限必要な抜き勾配β1が２度、角
度αが４度以上に設定されているが、第１側壁部２２
Ａ，第２側壁部２２Ｂの内壁面２２Ｂ，２３Ｂを光沢面
とした場合には、最低限必要な抜き勾配β1は上記拡散
面の場合より小さくなるので（例えば、２度）、このと
き角度αを小さく（例えば、４度若しくはそれ以上）し
て実際の抜き勾配βを小さくできる（請求項４に対
応）。この場合に用いられる屋根型反射鏡用金型は、そ
の仮想面Ｙ’が抜き方向に上記実際の抜き勾配β（α／
２）だけ傾けられる。In the above embodiment, the inner wall surfaces 22B and 23B of the first side wall portion 22A and the second side wall portion 22B are diffusion surfaces, and the minimum required draft β1 is 2 degrees and the angle α is Although it is set to 4 degrees or more, the first side wall portion 22
A, when the inner wall surfaces 22B and 23B of the second side wall portion 22B are glossy surfaces, the minimum required draft β1 is smaller than that of the diffusion surface (for example, 2 degrees). Can be reduced (for example, 4 degrees or more) to reduce the actual draft β (corresponding to claim 4). In the roof reflecting mirror mold used in this case, the virtual surface Y ′ has the above-mentioned actual draft β (α /
2) Can be tilted only.
【００３１】又、上記実施形態では、先ず角度αを屋根
型反射鏡用金型４０で必要な抜き勾配β1に応じて決定
し、このとき広がった第１側壁部２２を補助収納部１０
４に収納しているが、これとは反対に、先ず一眼レフレ
ックスカメラ１００本体に設けられ得る補助収納部１０
４の大きさを決定し、この補助収納部１０４内に収まる
範囲内で第１側壁部２２を傾ける角度αを自在に決定す
ることもできる（請求項６に対応）。In the above embodiment, the angle α is first determined in accordance with the draft β1 required by the roof reflecting mirror mold 40, and the first side wall portion 22 widened at this time is expanded into the auxiliary storage portion 10.
4 is stored in the single-lens reflex camera 100, on the contrary, the auxiliary storage section 10 that can be provided in the main body of the single-lens reflex camera 100.
It is also possible to determine the size of 4 and freely determine the angle α for inclining the first side wall portion 22 within a range that can be accommodated in the auxiliary storage portion 104 (corresponding to claim 6).
【００３２】[0032]
【発明の効果】以上説明した請求項１の発明によれば、
屋根型反射鏡の成形時にその抜き方向に対し第１側壁部
と第２側壁部とを各々所定角度以上で傾けて左右均等な
抜き勾配を確保しつつ、一眼レフレックスカメラへの取
り付け時には、当該カメラの収納部の左右何れか一方に
補助収納部を設け、この補助収納部に上記第１側壁部側
を突出させるだけで、カメラ全体を大型化することな
く、当該屋根型反射鏡を取り付けることができる。According to the first aspect of the present invention described above,
When the roof-type reflecting mirror is formed, the first side wall portion and the second side wall portion are inclined at a predetermined angle or more with respect to the pulling direction to ensure a uniform draft angle on the left and right sides, and at the time of mounting on the single-lens reflex camera, An auxiliary storage section is provided on either the left or right side of the storage section of the camera, and the roof type reflecting mirror can be attached without increasing the size of the entire camera simply by protruding the first side wall portion side into the auxiliary storage section. You can
【００３３】又、請求項２の発明によれば、屋根型反射
鏡用金型のキャビティにおいて、第１側壁部と第２側壁
部とに対応する面に、各々少なくとも上記必要な抜き勾
配を設けることができ、抜き加工が容易になる。又、請
求項３の発明によれば、屋根型反射鏡におけるゴースト
対策のために拡散面を形成した第１側壁部と第２側壁部
を有する屋根型反射鏡の抜き加工が容易になる。According to the second aspect of the invention, in the cavity of the roof reflecting mirror mold, at least the necessary draft is provided on each of the surfaces corresponding to the first side wall and the second side wall. It is possible to facilitate the punching process. According to the third aspect of the invention, the roof-type reflecting mirror having the first side wall portion and the second side wall portion, which has the diffusion surface formed as a countermeasure against the ghost in the roof-type reflecting mirror, can be easily punched.
【００３４】又、請求項４の発明によれば、当該屋根型
反射鏡の第１側壁面の傾きを小さくして、カメラ本体側
に必要な屋根型反射鏡の補助収納部を小さくできる。
又、請求項５の発明によれば、一眼レフレックスカメラ
を大型化せずに屋根型反射鏡を取り付けることができ
る。又、請求項６の発明によれば、モールド成形時の抜
き勾配に余裕をもたせることができる。Further, according to the invention of claim 4, the inclination of the first side wall surface of the roof reflecting mirror can be made small, and the auxiliary storing portion of the roof reflecting mirror required on the camera body side can be made small.
Further, according to the invention of claim 5, the roof-type reflecting mirror can be attached without increasing the size of the single-lens reflex camera. Further, according to the invention of claim 6, it is possible to allow a draft in the draft at the time of molding.
【００３５】又、請求項７の発明によれば、屋根型反射
鏡の収納部の近傍にあるミラー駆動機構が邪魔にならず
に、当該一眼レフレックスカメラに屋根型反射鏡を取り
付けられる。又、請求項８の発明によれば、左右非対称
の屋根型反射鏡であっても、その抜き加工が容易にな
る。Further, according to the invention of claim 7, the roof reflecting mirror can be attached to the single-lens reflex camera without disturbing the mirror driving mechanism in the vicinity of the housing portion of the roof reflecting mirror. Further, according to the invention of claim 8, even a left-right asymmetric roof-type reflecting mirror can be easily punched.
【図１】屋根型反射鏡２０の側面形状及び正面形状を示
す説明図である。FIG. 1 is an explanatory view showing a side surface shape and a front surface shape of a roof reflecting mirror 20.
【図２】屋根型反射鏡２０の斜視図である。FIG. 2 is a perspective view of a roof reflecting mirror 20.
【図３】屋根型反射鏡２０が取り付けられた一眼レフレ
ックスカメラ１００の内部構成の概略を示す正面図であ
る。FIG. 3 is a front view showing the outline of the internal configuration of the single-lens reflex camera 100 to which the roof reflecting mirror 20 is attached.
【図４】屋根型反射鏡用金型４０を示す断面図である。FIG. 4 is a cross-sectional view showing a roof reflecting mirror mold 40.
【図５】図４のＶ−Ｖ線に沿った断面図である。FIG. 5 is a sectional view taken along the line VV of FIG. 4;
【図６】屋根型反射鏡２０を成形した後に屋根型反射鏡
金型４０の雌型金型４１を外した状態を示す説明図であ
る。FIG. 6 is an explanatory diagram showing a state in which the female mold 41 of the roof reflecting mirror mold 40 is removed after the roof reflecting mirror 20 is molded.
【図７】雄型金型４５から屋根型反射鏡２０を外した状
態を示す説明図である。FIG. 7 is an explanatory diagram showing a state where the roof reflecting mirror 20 is removed from the male mold 45.
【図８】従来の屋根型反射鏡１０を示す正面図である。FIG. 8 is a front view showing a conventional roof reflector 10.
２０ 屋根型反射鏡 ２１ ダハ部 ２２ 第１側壁部 ２２Ａ 底部 ２３ 第２側壁部 ４０ 屋根型反射鏡用金型 ４０Ａ キャビティ ４１ 雌型金型 ４５ 雄型金型 １００ 一眼レフレックスカメラ １０１ 焦点板 １０２ ミラー駆動機構 １０３ 収納部 １０４ 補助収納部 20 roof type reflector 21 roof part 22 first side wall part 22A bottom part 23 second side wall part 40 roof type reflector mold 40A cavity 41 female mold 45 male mold 100 single-lens reflex camera 101 focusing plate 102 mirror Drive mechanism 103 Storage section 104 Auxiliary storage section
Claims (8)
ハ部と、該反射面に各々連なりカメラ本体側の焦点板に
平行な面となす角度が略９０度となる第１側壁部及び第
２側壁部がモールド成形により一体的に成形された一眼
レフレックスカメラのファインダに用いられる屋根型反
射鏡において、 少なくとも上記第１側壁部が、その底部が外側に広げら
れて、第１側壁部と第２側壁部が互いになす角度が所定
角度以上となるように形成され、 正面形状が、上記ダハ部の稜線を通過し当該焦点板に垂
直に交わる面に関して非対称となるように形成されてい
ることを特徴とする屋根型反射鏡。1. A first side wall portion and a first side wall portion which are formed by two reflecting surfaces intersecting each other at a right angle and an angle formed by each of the reflecting surfaces which is continuous with the reflecting surface and which is parallel to the focusing screen on the camera body side is about 90 degrees. (2) A roof reflector used in a viewfinder of a single-lens reflex camera in which two side walls are integrally formed by molding, at least the first side wall having a bottom portion expanded outward to form a first side wall portion. The second side wall portions are formed so that the angle formed by each other is equal to or greater than a predetermined angle, and the front shape is formed to be asymmetric with respect to a plane that passes through the ridge line of the roof portion and intersects perpendicularly with the focusing screen. A roof-type reflector characterized by.
な抜き勾配の２倍の角度であることを特徴とする請求項
１に記載の屋根型反射鏡。2. The roof reflecting mirror according to claim 1, wherein the predetermined angle is an angle twice the draft required for molding.
拡散面であり、 上記所定角度は略１０度であることを特徴とする請求項
１又は請求項２に記載の屋根型反射鏡。3. The roof mold according to claim 1, wherein the inner wall surfaces of the first side wall portion and the second side wall portion are diffusion surfaces, and the predetermined angle is about 10 degrees. Reflector.
光沢面であり、 上記所定角度は略４度であることを特徴とする請求項１
又は請求項２に記載の屋根型反射鏡。4. The inner wall surfaces of the first side wall portion and the second side wall portion are glossy surfaces, and the predetermined angle is approximately 4 degrees.
Alternatively, the roof reflecting mirror according to claim 2.
屋根型反射鏡が用いられた一眼レフレックスカメラにお
いて、 一眼レフレックスカメラ本体の屋根型反射鏡が収納され
る収納部の左右何れか一方に補助収納部が設けられ、 上記屋根型反射鏡は、上記第１側壁部が上記補助収納部
内に突出するように配置されていることを特徴とする屋
根型反射鏡を用いた一眼レフレックスカメラ。5. A single-lens reflex camera using the roof-type reflector according to any one of claims 1 to 4, wherein left and right sides of a storage unit for accommodating the roof-type reflector of the single-lens reflex camera body. An auxiliary storage unit is provided in either one of the roof-type reflecting mirrors, and the roof-type reflecting mirror is arranged so that the first side wall portion projects into the auxiliary storage unit. Reflex camera.
は、上記補助収納部の形状に沿って外側に広げられてい
ることを特徴とする請求項５に記載の屋根型反射鏡を用
いた一眼レフレックスカメラ。6. The roof reflecting mirror according to claim 5, wherein a bottom portion of the first side wall portion of the roof reflecting mirror is expanded outward along the shape of the auxiliary storage portion. The single-lens reflex camera used.
対側に形成されていることを特徴とする請求項６に記載
の一眼レフレックスカメラ。7. The single-lens reflex camera according to claim 6, wherein the auxiliary storage portion is formed on the opposite side of the mirror driving mechanism.
屋根型反射鏡をモールド成形する屋根型反射鏡用金型に
おいて、 上記第１及び第２側壁部に対応する雄型金型の２つの壁
面は、各々の壁面が抜き方向に対して同一の角度で交わ
るように形成されていることを特徴とする屋根型反射鏡
用金型。8. A roof reflecting mirror mold for molding the roof reflecting mirror according to claim 1, wherein the mold is a male mold corresponding to the first and second side wall portions. The two wall surfaces of No. 2 are formed so that the respective wall surfaces intersect at the same angle with respect to the drawing direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8082735A JPH09274221A (en) | 1996-04-04 | 1996-04-04 | Roof type reflection mirror and single-lens reflex camera using the same as well as metal mold for forming roof type reflection mirror |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8082735A JPH09274221A (en) | 1996-04-04 | 1996-04-04 | Roof type reflection mirror and single-lens reflex camera using the same as well as metal mold for forming roof type reflection mirror |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09274221A true JPH09274221A (en) | 1997-10-21 |
Family
ID=13782683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8082735A Pending JPH09274221A (en) | 1996-04-04 | 1996-04-04 | Roof type reflection mirror and single-lens reflex camera using the same as well as metal mold for forming roof type reflection mirror |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09274221A (en) |
-
1996
- 1996-04-04 JP JP8082735A patent/JPH09274221A/en active Pending
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