JPH0720537A - Finder device for single lens reflex camera - Google Patents
Finder device for single lens reflex cameraInfo
- Publication number
- JPH0720537A JPH0720537A JP19094293A JP19094293A JPH0720537A JP H0720537 A JPH0720537 A JP H0720537A JP 19094293 A JP19094293 A JP 19094293A JP 19094293 A JP19094293 A JP 19094293A JP H0720537 A JPH0720537 A JP H0720537A
- Authority
- JP
- Japan
- Prior art keywords
- type hollow
- roof
- holding member
- pentaprism
- hollow pentaprism
- 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)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、一眼レフカメラにおい
て、撮影画像をファインダー装置にて観察する時の屋根
型中空ペンタプリズム内に異物の浸入を防止するための
樹脂成形をしたファインダー装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a finder device for a single-lens reflex camera, which is resin-molded to prevent foreign matter from entering a roof-type hollow pentaprism when a photographed image is observed by the finder device. Is.
【０００２】[0002]
【従来の技術】従来の一眼レフカメラ等のファインダー
装置は、図４及び図５に示すように樹脂材料にて成形さ
れた屋根型中空ペンタプリズム保持部材２は、屋根型中
空ペンタプリズム１を箱型形状にて保持するので、屋根
型中空ペンタプリズム１の後面１ａと接触する保持部材
２の面２ａは、光軸と垂直な面に対し角度が０°以上で
約５°位の抜き勾配付の面にしないと、樹脂材と成形型
の離形が悪く精度のよい製品を作ることができない。よ
って、屋根型中空ペンタプリズム保持時には図３のよう
に屋根型中空ペンタプリズム１と保持部材２の間に角度
θ2による三角形状の隙間が生じてしまい、その隙間よ
り浸入する異物を防止するため、粘着テープやシリコン
接着剤などを用いていた。2. Description of the Related Art In a conventional viewfinder device such as a single-lens reflex camera, as shown in FIGS. 4 and 5, a roof type hollow pentaprism holding member 2 made of a resin material is used to form a roof type hollow pentaprism 1 into a box. Since it is held in a mold shape, the surface 2a of the holding member 2 that comes into contact with the rear surface 1a of the roof-type hollow pentaprism 1 has a draft of about 5 ° at an angle of 0 ° or more with respect to the surface perpendicular to the optical axis. If the surface is not formed, the resin material and the molding die are not well separated from each other, and a product with high accuracy cannot be manufactured. Therefore, when the roof-type hollow pentaprism is held, a triangular gap having an angle θ 2 is formed between the roof-type hollow pentaprism 1 and the holding member 2 as shown in FIG. 3, so that foreign matter entering through the gap is prevented. , Adhesive tape and silicone adhesive were used.
【０００３】[0003]
【発明が解決しようとする課題】ところが、前述従来例
では異物の浸入を防止するため、二次加工的な粘着テー
プやシリコン接着剤による目地止め作業が必要となり、
組立作業におけるコストアップとなっていた。また、シ
リコン接着剤を使用した場合、接着剤が乾燥するまで次
の作業が行えず仕掛りとなり、コストが高くなる欠点が
あった。However, in the above-mentioned conventional example, in order to prevent the entry of foreign matter, it is necessary to carry out a jointing work with a secondary processing adhesive tape or a silicone adhesive,
The cost for assembly work increased. Further, when the silicone adhesive is used, there is a drawback that the next work cannot be performed until the adhesive is dried, which is a work in process, and the cost is increased.
【０００４】さらに、屋根型中空ペンタプリズム１の後
面１ｃは、屋根型中空ペンタプリズム１を保持する保持
部材２との取り付け基準面であることから、取り付け作
業時の位置決めは後面１ａと底面１ｂの接する線１ｃで
あり、作業上保持部材２の傾いた面２ａに平行に取り付
け作業を行いがちで、屋根型中空ペンタプリズム１を正
確に位置決めできなかった。Further, since the rear surface 1c of the roof-type hollow pentaprism 1 is a reference surface for mounting with the holding member 2 for holding the roof-type hollow pentaprism 1, the positioning at the time of mounting work is performed on the rear surface 1a and the bottom surface 1b. It is the line 1c that is in contact with the roof-shaped hollow pentaprism 1 and the roof-type hollow pentaprism 1 cannot be accurately positioned because the work tends to be performed parallel to the inclined surface 2a of the holding member 2.
【０００４】本発明は、前述従来例の欠点を除去し、屋
根型中空ペンタプリズムを保持部材に簡単かつ精度よく
固定できるファインダー装置を提供することを目的とす
る。SUMMARY OF THE INVENTION It is an object of the present invention to provide a finder device which eliminates the above-mentioned drawbacks of the conventional example and can fix the roof type hollow pentaprism to the holding member easily and accurately.
【０００５】[0005]
【課題を解決するための手段】前述の目的を達成するた
めに、本発明の一眼レフカメラのファインダー装置は屋
根型中空ペンタプリズムと樹脂材料によって成形された
屋根型中空ペンタプリズム保持部材とを、その組立時に
基準面となるそれぞれの面が撮影光軸に垂直な面に対し
て同一な角度となるようにしたものである。In order to achieve the above-mentioned object, a viewfinder device of a single lens reflex camera of the present invention comprises a roof type hollow pentaprism and a roof type hollow pentaprism holding member formed of a resin material. The respective surfaces, which are reference surfaces when assembled, are arranged at the same angle with respect to the surface perpendicular to the photographing optical axis.
【０００６】[0006]
【作用】以上の構成のファインダー装置は、屋根型中空
ペンタプリズム保持部材が箱型形状のため、屋根型中空
ペンタプリズムの基準面と当たる保持部材の基準面を光
軸に垂直な面で成形することが離型上困難であったの
を、屋根型中空ペンタプリズムの基準面を保持部材の基
準面と同じ傾きの角度を付けて組立製品状態で互いに面
当たりとなるようにしたので、異物の浸入を防止すると
ともに組立作業性をよくすることができる。In the finder device having the above structure, since the roof-shaped hollow pentaprism holding member is box-shaped, the reference surface of the holding member, which is the reference surface of the roof-shaped hollow pentaprism, is formed by a surface perpendicular to the optical axis. It was difficult to release the mold, but the reference surface of the roof-type hollow pentaprism was set to the same angle as the reference surface of the holding member so that they would come into contact with each other in the assembled product state. It is possible to prevent penetration and improve assembly workability.
【０００７】[0007]
【実施例】本発明の一実施例を図１ないし図３に基づい
て説明する。図１は本実施例による一眼レフカメラの要
部断面図である。図１において、１１はは撮影レンズ、
１２は可動ミラー、１３は焦点板、１４は樹脂材料で成
形された屋根型中空ペンタプリズムであり、１５は屋根
型中空ペンタプリズム１４を保持するための樹脂材料で
成形された屋根型中空ペンタプリズム保持部材で、前記
可動ミラー１２，焦点板１３及び撮影レンズ１１を着脱
するための図示されないマウント等を固定するように一
体成形されている。１６，１７はファインダー系の接眼
レンズである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a sectional view of a main part of a single-lens reflex camera according to this embodiment. In FIG. 1, 11 is a photographing lens,
Reference numeral 12 is a movable mirror, 13 is a focusing screen, 14 is a roof-type hollow pentaprism made of a resin material, and 15 is a roof-type hollow pentaprism made of a resin material for holding the roof-type hollow pentaprism 14. A holding member is integrally formed so as to fix a mount (not shown) for attaching and detaching the movable mirror 12, the focusing screen 13, and the taking lens 11. Reference numerals 16 and 17 are viewfinder eyepiece lenses.
【０００８】そして、前記屋根型中空ペンタプリズム保
持部材１５の屋根型中空ペンタプリズム取り付け部分に
は、図３に示すようにプリズム後面側と相対する保持面
１５ａが前述図５の従来例のように成形時の型の離形の
ために撮影光軸に垂直な面に対し角度θ2が０°以上で
約５°位の抜き勾配付の面にしてある。そこで、屋根型
中空ペンタプリズム１４の後面１４ａについては、屋根
型中空ペンタプリズム保持部材１５を保持するための保
持面１５ａと面接触させるために、撮影レンズ光軸に垂
直な面に対し、該屋根型中空ペンタプリズム保持部材１
５の保持面１５ａと同一の角度θ2をなすように後面１
４ａの上縁から下縁に向かって前方に勾配を付けて樹脂
材料で成形してある。At the roof-type hollow pentaprism holding member 15 of the roof-type hollow pentaprism holding member 15, as shown in FIG. 3, a holding surface 15a facing the rear surface of the prism is provided as in the conventional example shown in FIG. In order to release the mold at the time of molding, the surface having a draft angle of about 5 ° when the angle θ 2 is 0 ° or more with respect to the surface perpendicular to the photographing optical axis. Therefore, the rear surface 14a of the roof-type hollow pentaprism 14 is brought into surface contact with the holding surface 15a for holding the roof-type hollow pentaprism holding member 15, so that the roof surface is perpendicular to the optical axis of the taking lens. Type hollow pentaprism holding member 1
No. 5 holding surface 15a has the same angle θ 2 as the rear surface 1
4a is formed from a resin material with a forward gradient from the upper edge to the lower edge.
【０００９】以上の構成の本実施例においては、屋根型
中空ペンタプリズム１４を屋根型中空ペンタプリズム保
持部材１５に取り付けた場合に、屋根型中空ペンタプリ
ズム１４の後面１４ａと屋根型中空ペンタプリズム保持
部材１５の保持面１５ａとが同一角度であるので、両面
の間には隙間が生じなくなる。また、屋根型中空ペンタ
プリズム１４を屋根型中空ペンタプリズム保持部材１５
に固定した場合に従来例で示したように誤って傾いたま
ま、屋根型中空ペンタプリズム保持部材１５に固定され
ることなく正確に位置決めできる。In this embodiment having the above-mentioned structure, when the roof-type hollow pentaprism 14 is attached to the roof-type hollow pentaprism holding member 15, the rear surface 14a of the roof-type hollow pentaprism 14 and the roof-type hollow pentaprism 14 are held. Since the holding surface 15a of the member 15 is at the same angle, there is no gap between the two surfaces. Further, the roof-type hollow pentaprism 14 is replaced with the roof-type hollow pentaprism holding member 15
When fixed to the roof type hollow pentaprism holding member 15, it can be accurately positioned without being fixed to the roof-type hollow pentaprism holding member 15 while being erroneously tilted as shown in the conventional example.
【００１０】[0010]
【発明の効果】本発明は、以上説明したようにファイン
ダー装置の屋根型中空ペンタプリズムと樹脂材料によっ
て成形された屋根型中空ペンタプリズム保持部材とを、
その組立時に基準面となるそれぞれの面が撮影光軸に垂
直な面に対して同一な角度をなすようにすることによ
り、それぞれの面が組立時に面当りとなって密着し、そ
の間に隙間がなくなり、製品コストを上げることなく異
物の浸入を防止することができ、かつ組立性がよくな
り、品質が補償できる。As described above, the present invention provides a roof-type hollow pentaprism holding member for a finder device and a roof-type hollow pentaprism holding member formed of a resin material.
By making each surface, which is the reference surface at the time of assembly, form the same angle with respect to the surface perpendicular to the optical axis of photography, each surface becomes a surface contact at the time of assembly and comes into close contact, and there is a gap between them. It is possible to prevent foreign matter from entering without increasing the product cost, improve the assemblability, and compensate for the quality.
【図１】本発明に係る一実施例の一眼レフカメラのファ
インダー装置の概略断面図である。FIG. 1 is a schematic cross-sectional view of a viewfinder device of a single-lens reflex camera according to an embodiment of the present invention.
【図２】その屋根型中空ペンタプリズムの側面図であ
る。FIG. 2 is a side view of the roof-type hollow pentaprism.
【図３】その屋根型中空ペンタプリズム保持部材の要部
断面図である。FIG. 3 is a sectional view of a main part of the roof-type hollow pentaprism holding member.
【図４】従来例の一眼レフカメラのファインダー装置の
概略断面図である。FIG. 4 is a schematic sectional view of a finder device of a conventional single-lens reflex camera.
【図５】その屋根型中空ペンタプリズム保持部材の要部
斜視図である。FIG. 5 is a perspective view of a main part of the roof-type hollow pentaprism holding member.
１１・・撮影レンズ、１２・・可動ミラー、１３・・焦
点板、１４・・屋根型中空ペンタプリズム、１４ａ・・
基準面となる後面、１５・・屋根型中空ペンタプリズム
保持部材、１５ａ・・基準面となる保持面、１６，１７
・・接眼レンズ。11 ... Photographic lens, 12 ... Movable mirror, 13 ... Focus plate, 14 ... Roof-type hollow pentaprism, 14a ...
Rear surface serving as a reference surface, 15 ... Roof-type hollow pentaprism holding member, 15a ... Holding surface serving as a reference surface, 16, 17
..Eyepieces
Claims (1)
よって成形された屋根型中空ペンタプリズム保持部材と
を、その組立時に基準面となるそれぞれの面が撮影光軸
に垂直な面に対して同一な角度となることを特徴とする
一眼レフカメラのファインダー装置。1. A roof-type hollow pentaprism and a roof-type hollow pentaprism holding member formed of a resin material, each surface serving as a reference plane when assembled, is the same as a plane perpendicular to a photographing optical axis. A viewfinder device for a single-lens reflex camera characterized by an angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19094293A JPH0720537A (en) | 1993-07-05 | 1993-07-05 | Finder device for single lens reflex camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19094293A JPH0720537A (en) | 1993-07-05 | 1993-07-05 | Finder device for single lens reflex camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0720537A true JPH0720537A (en) | 1995-01-24 |
Family
ID=16266243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19094293A Pending JPH0720537A (en) | 1993-07-05 | 1993-07-05 | Finder device for single lens reflex camera |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0720537A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6052533A (en) * | 1996-01-30 | 2000-04-18 | Canon Kabushiki Kaisha | Optical apparatus such as a camera |
-
1993
- 1993-07-05 JP JP19094293A patent/JPH0720537A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6052533A (en) * | 1996-01-30 | 2000-04-18 | Canon Kabushiki Kaisha | Optical apparatus such as a camera |
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