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JPH112853A - Photometry device for camera - Google Patents

Photometry device for camera

Info

Publication number
JPH112853A
JPH112853A JP9153214A JP15321497A JPH112853A JP H112853 A JPH112853 A JP H112853A JP 9153214 A JP9153214 A JP 9153214A JP 15321497 A JP15321497 A JP 15321497A JP H112853 A JPH112853 A JP H112853A
Authority
JP
Japan
Prior art keywords
light
photoreceptor
camera
window
incident light
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
Application number
JP9153214A
Other languages
Japanese (ja)
Inventor
Masashi Takamura
雅司 高村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Priority to JP9153214A priority Critical patent/JPH112853A/en
Publication of JPH112853A publication Critical patent/JPH112853A/en
Pending legal-status Critical Current

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  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Exposure Control For Cameras (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a compact photometry device for a camera surely preventing external light which is unnecessary for photometry from entering at a low cost. SOLUTION: An incident light limiting member 33 preventing the unnecessary external light other than from a subject from being made incident is provided on the front surface of a photoreceptor 32 constituting the photometry device. A light shielding layer 30a by black printing process is formed on the inside surface of a front surface cover 30, and a transparent photoreceiving window 30b obtained by eliminating the layer 30a by the specified range of the periphery of the optical axis of the photoreceptor 32 is formed. The member 33 is a cylindrical member entirely formed of elastic black rubber, the front end edge is brought into press-contact with the cover 30, and the trailing end edge is brought into press-contact with the photoreceptor 32. A photoreceiving body diaphragm 33a limiting light made incident on the photoreceiving surface of the body 32 is formed on the trailing end edge where the member 33 is brought into contact with the photoreceptor 32.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明はカメラ用測光装置に
関し、更に詳しくは、カメラ用測光装置の受光体に関す
るものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photometric device for a camera, and more particularly to a photoreceptor of the photometric device for a camera.

【0002】[0002]

【従来の技術】低価格で携帯性の良いコンパクトカメラ
は、コストダウンと小型化とを達成するために、構成部
品を機能別にユニット化して部品数の削減や組み立てコ
ストの低減を図り、内部スペースを有効に利用してい
る。例えば、被写体輝度の測光装置を構成する受光体
や、或いはファインダレンズ等の高い取付精度の必要な
部品は、ブロック形状のファインダ用基板に取り付けて
ユニット化し、これをカメラ本体の上部に取り付けるよ
うにしている。
2. Description of the Related Art In order to achieve cost reduction and miniaturization, a low-priced, highly portable compact camera is designed to reduce the number of parts and assembly costs by unitizing the components into functions and reduce the internal space. Is used effectively. For example, photoreceptors constituting a photometric device for object brightness, or parts requiring high mounting accuracy, such as a finder lens, are mounted on a block-shaped finder substrate to form a unit, which is mounted on the top of the camera body. ing.

【0003】上記のようなファインダ用基板に取り付け
られる測光装置は、中央重点測光により測光の精度を高
めるために、ファインダ用基板の前面に設けられるた前
面カバーに、一定範囲だけ透明な測光窓を設け、この前
面カバーの奥に相当の距離をおいて受光体を配置するこ
とにより、受光体に入射する光を制限していた。
The photometric device mounted on the finder substrate as described above has a transparent photometric window for a certain range on a front cover provided on the front of the finder substrate in order to enhance the photometric accuracy by center-weighted photometry. The light incident on the photoreceptor is limited by disposing the photoreceptor at a considerable distance behind the front cover.

【0004】[0004]

【発明が解決しようとする課題】しかしながら、上述し
たような方法では、カメラの厚みが厚くなってしまい、
カメラのコンパクト化の大きな障害となる。一方、カメ
ラの厚みを薄くするために、測光装置を形成する前面カ
バーの測光窓と受光体とを近づけると、今度は測光に不
必要な外光の侵入が多くなり、測光精度が低下するとい
う問題が生じる。
However, in the above-described method, the thickness of the camera is increased.
This is a major obstacle to downsizing the camera. On the other hand, if the photometric window of the front cover forming the photometric device is brought closer to the photoreceptor in order to reduce the thickness of the camera, the intrusion of extraneous light unnecessary for photometric measurement will increase, and photometric accuracy will decrease. Problems arise.

【0005】また、前面カバーの内面の遮光層は、印刷
により形成されるので、この遮光層の一部を設けないこ
とにより形成される測光窓の寸法精度を高くすることは
限界があり、測光窓だけで測光に不要な外光の入射を効
果的に制限することは限界がある。
Further, since the light-shielding layer on the inner surface of the front cover is formed by printing, there is a limit to increasing the dimensional accuracy of the light-metering window formed by not providing a part of this light-shielding layer. There is a limit to effectively restrict the incidence of external light unnecessary for photometry only by the window.

【0006】更に、ファインダ用基板は、組み立て効率
上、各部分の寸法はある程度の余裕をもって形成されて
いるので、測光装置に隣接して設けられているオートフ
ォーカス用の光源や、赤目防止用ランプ等の光の一部が
測光装置の光路内に侵入することが避けられない。
Further, since the size of each part of the finder substrate is formed with a certain margin in terms of assembly efficiency, a light source for auto-focus and a red-eye prevention lamp provided adjacent to the photometric device are provided. It is inevitable that some of the light such as enters the optical path of the photometric device.

【0007】本発明は、上記問題点を解決するためのも
のであり、測光精度に不要な外光の侵入を、ローコスト
で確実に防止するコンパクトなカメラ用測光装置を提供
することを目的とする。
SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a compact photometric device for a camera which reliably prevents intrusion of external light unnecessary for photometric accuracy at low cost. .

【0008】[0008]

【課題を解決するための手段】上記問題点を解決するた
めに、本発明においては、カメラの前面カバーに設けら
れた一定サイズの遮光窓の奥に受光体を組み込み、前記
測光窓を通過した被写体光を前記受光体で受光して被写
体輝度の測定を行うカメラ用測光装置において、前記前
面カバーと受光体との間に、後端縁を受光体前面の受光
面に圧着させ、前端縁を前面カバーの裏面に圧着させる
とともに、後端側に受光面の露出範囲を制限する受光体
絞りを一体に設けた入射光制限部材を設けたものであ
る。
In order to solve the above-mentioned problems, according to the present invention, a photoreceptor is installed behind a light-shielding window of a fixed size provided on a front cover of a camera, and the light-receiving member is passed through the photometric window. In a photometric device for a camera for measuring subject brightness by receiving subject light with the photoreceptor, between the front cover and the photoreceptor, a rear edge is pressed against a light receiving surface on a front surface of the photoreceptor, and a front edge is formed. An incident light limiting member is provided which is pressure-bonded to the back surface of the front cover and is provided integrally with a photoreceptor aperture for limiting the exposure range of the light receiving surface on the rear end side.

【0009】また、請求項2においては、前記入射光制
限部材を、弾性体で形成したものであり、請求項3にお
いては、前記測光窓の中心を通る水平な光軸に対して前
記受光体絞りの中心を垂直上方にずらすとともに、前記
入射光制限部材を前記光軸に対して回転非対称形状にし
たものである。
According to a second aspect of the present invention, the incident light limiting member is formed of an elastic body. In a third aspect of the present invention, the light receiving body is formed with respect to a horizontal optical axis passing through the center of the photometric window. The center of the stop is shifted vertically upward, and the incident light limiting member has a rotationally asymmetric shape with respect to the optical axis.

【0010】[0010]

【発明の実施の形態】図2は、本発明を実施したカメラ
の外観を示す斜視図である。カメラ2は、プラスチック
製のカートリッジに写真フイルムを収納したIX240
タイプのフイルムカートリッジを使用するコンパクトタ
イプのカメラである。このカメラ2は、フイルムカート
リッジが装填されるとともに各種撮影機構が組み付けら
れたカメラ本体3(図3参照)の前後を、前側外装板4
aと後側外装板4bとで覆った形態となっている。
FIG. 2 is a perspective view showing the appearance of a camera embodying the present invention. The camera 2 has an IX240 in which a photo film is stored in a plastic cartridge.
This is a compact camera that uses a type film cartridge. The camera 2 includes a front outer plate 4 that is mounted on a front side of a camera body 3 (see FIG. 3) in which a film cartridge is loaded and various photographing mechanisms are assembled.
a and a rear exterior plate 4b.

【0011】カメラ2の上面には、ピント合わせ時に半
押しされ、シャッタレリーズ時に深く押し込まれるシャ
ッタボタン6が設けられている。また、カメラ2の前面
には、レンズ鏡胴7,測距用の投光窓8と受光窓9,測
光用の測光窓10,対物側ファインダ窓11,赤目軽減
用ランプ窓12や、ストロボ発光部13等が設けられて
いる。カメラ2の背面側には、図示しないが、接眼側フ
ァインダ窓や、各種撮影情報が表示される液晶パネル,
ズームレンズであるレンズ鏡胴7の変倍操作を行うズー
ムレバー,フイルムカートリッジを装填,取り出しする
ための底蓋等が設けられている。
On the upper surface of the camera 2, there is provided a shutter button 6 which is half-pressed during focusing and deeply pressed during shutter release. On the front surface of the camera 2, a lens barrel 7, a light-emitting window 8 and a light-receiving window 9 for distance measurement, a light-metering window 10 for light measurement, an objective-side finder window 11, a red-eye reduction lamp window 12, a strobe light emission, and the like. A part 13 and the like are provided. On the back side of the camera 2, although not shown, an eyepiece side finder window, a liquid crystal panel on which various shooting information is displayed,
A zoom lever for changing the magnification of the lens barrel 7 as a zoom lens, a bottom cover for loading and unloading a film cartridge, and the like are provided.

【0012】図3は、カメラ2の構成を示す分解斜視図
である。カメラ本体3は、前面中央に取り付けられるレ
ンズ鏡胴7を挟んで、フイルムカートリッジが装填され
るカートリッジ室15と、このカートリッジ室15に装
填されたフイルムカートリッジから送り出された写真フ
イルムが巻き取られるフイルム巻取り室16とを備えて
いる。
FIG. 3 is an exploded perspective view showing the structure of the camera 2. The camera body 3 has a cartridge chamber 15 in which a film cartridge is loaded and a film in which a photographic film sent out from the film cartridge loaded in the cartridge chamber 15 is wound around a lens barrel 7 attached to the front center. And a winding chamber 16.

【0013】また、フイルム巻取り室16内には、写真
フイルムを巻き取るための巻取り軸が回転自在に配置さ
れており、この巻取り軸の内部には、フイルム給送の駆
動源となるモータが組み込まれている。カートリッジ室
15の上部には、フイルムカートリッジのスプールに係
合してフイルム送り出し方向と巻戻し方向とに回転させ
る駆動軸18と、この駆動軸18を回転させるギヤ1
9,20,21からなるギヤトレイン22とが回転自在
に取り付けられている。このギヤトレイン22は、ギヤ
21に同軸に取り付けられた回転軸23と、カメラ本体
3の底部に組み込まれた図示しないギヤトレインとを介
してモータに連結されている。
A take-up shaft for taking up a photographic film is rotatably arranged in the film take-up chamber 16, and the inside of the take-up shaft is a driving source for feeding the film. A motor is incorporated. A drive shaft 18 that engages with a spool of the film cartridge and rotates in a film feeding direction and a rewinding direction, and a gear 1 that rotates the drive shaft 18 is provided above the cartridge chamber 15.
A gear train 22, 9, 20, 21 is rotatably mounted. The gear train 22 is connected to a motor via a rotating shaft 23 coaxially mounted on the gear 21 and a gear train (not shown) incorporated at the bottom of the camera body 3.

【0014】カメラ本体3の上部には、測距用,測光用
の素子とファインダ光学系とを保持するとともに、カー
トリッジ室15の上部に取り付けられたギヤトレイン2
2を軸支する保持部材25が取り付けられ、この保持部
材25の上部には、カメラ2の各部を制御する制御回路
が形成された制御基板26が取り付けられる。保持部材
25は、大きく分けて、各種素子やファインダ光学系が
取り付けられるファインダ用基板であるAF・ファイン
ダ保持部28と、ギヤトレイン22を軸支するギヤ支持
板であるギヤ支持部29とからなる。また、このAF・
ファインダ保持部28の前面側には、一部が透明な前面
カバー30が設けられる(図2参照)。なお、この前面
カバー30の透明な部分以外は、遮光用の印刷が施され
た遮光層30aで前面カバー30の内面が覆われる(図
1参照)。
An upper part of the camera body 3 holds a distance measuring and photometric element and a finder optical system, and a gear train 2 mounted on an upper part of the cartridge chamber 15.
A holding member 25 that supports the camera 2 is mounted, and a control board 26 on which a control circuit for controlling each part of the camera 2 is formed is mounted on the holding member 25. The holding member 25 is roughly divided into an AF / finder holding portion 28 which is a finder substrate to which various elements and a finder optical system are attached, and a gear supporting portion 29 which is a gear supporting plate for supporting the gear train 22. . In addition, this AF
A front cover 30 partially transparent is provided on the front side of the finder holding section 28 (see FIG. 2). Except for the transparent portion of the front cover 30, the inner surface of the front cover 30 is covered with a light-shielding layer 30a on which light-shielding printing is performed (see FIG. 1).

【0015】AF・ファインダ保持部28はブロック形
状をしており、その前面には、測距用の受光レンズ31
と、本発明の測光装置を構成する受光体32及び入射光
制限部材33と、赤目軽減用のランプ34とが各々取り
付けられる取付け開口35,36,37が形成されてい
る。受光レンズ31が取り付けられる取付け開口35の
背後には光密な筒部38が一体に形成されており、この
筒部38の背後には測距用の受光体39が取り付けられ
る。
The AF / finder holding section 28 has a block shape, and a light receiving lens 31 for distance measurement is provided on the front surface thereof.
In addition, mounting openings 35, 36, and 37 are formed in which the photoreceptor 32 and the incident light limiting member 33 that constitute the photometric device of the present invention, and the red-eye reduction lamp 34 are respectively mounted. A light-tight cylindrical portion 38 is integrally formed behind the mounting opening 35 to which the light receiving lens 31 is mounted, and a light measuring body 39 for distance measurement is mounted behind the cylindrical portion 38.

【0016】測光装置を構成する受光体32の前面に
は、測光精度を低下させる、被写体以外からの不要な外
光が受光体32に入射することを防止するための入射光
制限部材33が設けられている。図1に示すように、受
光体32、及び入射光制限部材33が取り付けられる、
AF・ファインダ保持部28の筒部40は、中程に段差
40aが形成され、この段差40aよりも背面側に受光
体32が、また、段差40aよりも前面側に入射光制限
部材33が取り付けられる。
An incident light restricting member 33 is provided on the front surface of the photoreceptor 32 constituting the photometric device to prevent unnecessary external light from other than the subject from being incident on the photoreceptor 32, which lowers the photometric accuracy. Have been. As shown in FIG. 1, the light receiving body 32 and the incident light limiting member 33 are attached.
The cylindrical portion 40 of the AF / finder holding portion 28 has a step 40a formed in the middle thereof, and the light receiving body 32 is mounted on the back side of the step 40a, and the incident light limiting member 33 is mounted on the front side of the step 40a. Can be

【0017】また、AF・ファインダ保持部28の前面
側に取り付けられる前面カバー30の内面には、黒色の
印刷加工による遮光層30aが形成されているが、上述
した入射光制限部材33の前方に対応した部分だけは、
受光体32の光軸周縁の一定範囲だけ遮光層30aがな
い、透明な受光窓30bになっている。
A light-shielding layer 30a formed by black printing is formed on the inner surface of the front cover 30 attached to the front side of the AF / finder holder 28. Only the corresponding parts
The transparent light receiving window 30b has no light shielding layer 30a in a certain range around the optical axis of the light receiving body 32.

【0018】入射光制限部材33は、全体が弾性のある
黒色のゴムで形成された筒型の部材であり、前端縁が前
面カバー30に、後端縁が受光体32に各々圧接してい
る。そして、この入射光制限部材33が受光体32に接
する後端縁には、受光体32の受光面に入射する光を制
限する受光体絞り33aが形成されている。
The incident light restricting member 33 is a cylindrical member entirely formed of elastic black rubber, and its front edge presses against the front cover 30 and its rear edge presses against the photoreceptor 32, respectively. . At the rear end of the incident light restricting member 33 where the incident light restricting member 33 is in contact with the light receiving body 32, a light receiving body stop 33a for limiting light incident on the light receiving surface of the light receiving body 32 is formed.

【0019】このように、遮光層30aにより透光範囲
を制限した受光窓30bと、入射光制限部材33の受光
体絞り33aにより、図1に示すように、被写体からの
反射光の範囲である角度θより外側の、測光精度を低下
させる不要な外光が、受光体32に入射することを防
ぎ、角度θの範囲の被写体光だけ入射させる。
As described above, the light receiving window 30b whose light transmission range is limited by the light shielding layer 30a and the photoreceptor stop 33a of the incident light restricting member 33 define the range of the reflected light from the subject as shown in FIG. Unnecessary external light outside the angle θ, which lowers the photometric accuracy, is prevented from entering the photoreceptor 32, and only the subject light within the range of the angle θ is allowed to enter.

【0020】また、受光体32の取付け開口36の側方
には、ファインダ光学系を構成する対物レンズユニット
41を取り付けるための筒部42が形成されており、こ
の筒部42の前面には対物レンズユニット41用の開口
43が形成され、後端にはファインダ光学系を構成する
プリズム44が取り付けられる。また、筒部42の側方
には、測距用の投光素子45と投光レンズ46とが取り
付けられる筒部47が形成されている。
A cylindrical portion 42 for mounting an objective lens unit 41 constituting a finder optical system is formed on the side of the mounting opening 36 of the photoreceptor 32. An opening 43 for the lens unit 41 is formed, and a prism 44 constituting a finder optical system is attached to the rear end. On the side of the cylindrical portion 42, a cylindrical portion 47 to which a light emitting element 45 for distance measurement and a light emitting lens 46 are attached is formed.

【0021】上記AF・ファインダ保持部28はカメラ
本体3の上部に組み付けられ、測距用の受光レンズ3
1,測光用の受光体32,赤目軽減用ランプ34,対物
レンズユニット41,測距用の投光レンズ46は、測距
用の受光窓9,測光用の測光窓10,赤目軽減用ランプ
窓12,対物側ファインダ窓11,測距用の投光窓8の
背後に配置される。
The AF / finder holder 28 is mounted on the upper part of the camera body 3 and has a light receiving lens 3 for distance measurement.
1, a light receiving body 32 for photometry, a lamp 34 for red eye reduction, an objective lens unit 41, and a projection lens 46 for distance measurement are provided with a light receiving window 9 for distance measurement, a photometry window 10 for photometry, and a lamp window for red eye reduction. 12, an object-side finder window 11, and a distance measuring light-emitting window 8 are arranged behind.

【0022】ギヤ支持部29は板形状となっており、A
F・ファインダ保持部28の測距用の受光レンズ31が
取り付けられる筒部38の側方から突出するように一体
に形成されている。このギヤ支持部29の上面には、ズ
ームレンズであるレンズ鏡胴7の変倍操作に用いられる
ズームレバー49が組み付けられる。このズームレバー
49は、ギヤ支持板29の上面に立設されたピン50に
取り付けられて、中立位置を挟む望遠位置と広角位置と
の間で揺動自在とされる。また、このズームレバー49
には、望遠位置と広角位置とに揺動されたズームレバー
49を中立位置に復帰させる弾性片51が一体に形成さ
れている。
The gear support 29 has a plate shape.
It is integrally formed so as to protrude from the side of the cylindrical portion 38 of the F / finder holding portion 28 to which the light receiving lens 31 for distance measurement is attached. On an upper surface of the gear support portion 29, a zoom lever 49 used for zooming operation of the lens barrel 7 as a zoom lens is assembled. The zoom lever 49 is attached to a pin 50 erected on the upper surface of the gear support plate 29, and is swingable between a telephoto position and a wide-angle position sandwiching the neutral position. Also, this zoom lever 49
An elastic piece 51 for returning the zoom lever 49 rocked between the telephoto position and the wide-angle position to the neutral position is integrally formed.

【0023】また、ズームレバー49の上面には、ズー
ム切替えスイッチ用の金属接片53が取り付けられる。
この金属接片53は、保持部材25の上部に取り付けら
れる制御基板26に接触し、ズームレバー49が揺動さ
れた際に一緒に揺動して制御基板26の導通面に接触
し、ズーム切替えスイッチのオン・オフを行う。
On the upper surface of the zoom lever 49, a metal contact piece 53 for a zoom changeover switch is attached.
The metal contact piece 53 comes into contact with the control board 26 mounted on the upper part of the holding member 25, and swings together when the zoom lever 49 is swung to contact the conductive surface of the control board 26, thereby performing zoom switching. Turn the switch on and off.

【0024】制御基板26は、保持部材25に2本のネ
ジ55,56で取り付けられる。また、制御基板26と
保持部材25との取付け部分の間には、2枚のフレキシ
ブル基板57,58が挟み込まれる。一方のフレキシブ
ル基板57は、フイルムカートリッジに設けられたバー
コードデータを読み取るバーコードリーダーと制御基板
26とを接続するためのものである。また、他方のフレ
キシブル基板58は、写真フイルムの磁気記録層へ各種
データを磁気記録する磁気ヘッドと制御基板26とを接
続するためのものである。
The control board 26 is attached to the holding member 25 with two screws 55 and 56. Further, two flexible substrates 57 and 58 are sandwiched between a portion where the control substrate 26 and the holding member 25 are attached. One flexible board 57 is for connecting a control board 26 to a barcode reader provided on the film cartridge for reading barcode data. The other flexible substrate 58 is for connecting the control substrate 26 to a magnetic head for magnetically recording various data on the magnetic recording layer of the photographic film.

【0025】これらのフレキシブル基板57,58と制
御基板26とには、それぞれ導通部が形成されており、
制御基板が各フレキシブル基板57,58を挟み込んだ
状態で保持部材25に取り付けられることにより、これ
らの導通部が接触して電気的に接続される。
The flexible boards 57 and 58 and the control board 26 are formed with conductive portions, respectively.
When the control board is attached to the holding member 25 with the flexible boards 57 and 58 sandwiched therebetween, these conductive portions come into contact and are electrically connected.

【0026】以上のような構成のカメラの作用について
説明する。遮光層30aにより透光範囲を制限した受光
窓30bと、入射光制限部材33の受光体絞り33aに
より、図1に示すように、被写体からの反射光の範囲で
ある角度θより外側の、測光精度を低下させる不要な外
光が、受光体32に入射することを防ぐことができる。
そして、受光窓30bと入射光制限部材33の受光体絞
り33aとで、測光に不要な外光の入射を制限すること
により、受光窓30bだけで入射を制限するよりも、受
光体32と受光窓30bとの間を短くすることが可能に
なり、カメラのコンパクト化が可能になる。
The operation of the camera having the above configuration will be described. As shown in FIG. 1, photometry outside the angle θ, which is the range of the reflected light from the subject, is achieved by the light receiving window 30b whose light transmission range is restricted by the light shielding layer 30a and the light receiving member stop 33a of the incident light restricting member 33, as shown in FIG. Unnecessary external light that reduces accuracy can be prevented from being incident on the photoreceptor 32.
The light receiving window 30b and the photoreceptor stop 33a of the incident light restricting member 33 restrict the incidence of external light unnecessary for photometry. The distance from the window 30b can be shortened, and the camera can be made compact.

【0027】また、前面カバー30の内面の遮光層30
aの印刷加工の精度を精密に保持することが困難なた
め、受光窓30bの大きさを誤差無く形成することは難
しいが、受光体32と前面カバー30の受光窓30bと
の間に入射光制限部材33を設けることにより、受光窓
30bの寸法精度が多少ずれても、入射光制限部材33
により測光に影響する不要な外光が確実にカットされ
る。
The light shielding layer 30 on the inner surface of the front cover 30
It is difficult to precisely maintain the size of the light receiving window 30b without error because it is difficult to accurately maintain the accuracy of the printing process a. However, the incident light between the light receiving body 32 and the light receiving window 30b of the front cover 30 is difficult. By providing the restricting member 33, even if the dimensional accuracy of the light receiving window 30b is slightly shifted, the incident light restricting member 33
As a result, unnecessary external light affecting photometry is reliably cut.

【0028】一方、入射光制限部材33は弾性のあるゴ
ムで形成されているので、この入射光制限部材33が取
り付けられるAF・ファインダ保持部28の筒部38
を、コストのかかる高精度加工で形成せずに、多少寸法
にあそびがあっても、ゴムの弾性により入射光制限部材
33は確実に筒部38の内壁に密着し、筒部38内で揺
動することがない。
On the other hand, since the incident light restricting member 33 is formed of elastic rubber, the cylindrical portion 38 of the AF / finder holder 28 to which the incident light restricting member 33 is attached.
Even if there is some play in the dimensions without being formed by costly high-precision processing, the elasticity of the rubber ensures that the incident light restricting member 33 adheres tightly to the inner wall of the cylindrical portion 38 and swings in the cylindrical portion 38. Does not move.

【0029】また、同様に入射光制限部材33の前端
縁、後端縁も、ゴムの弾性により、寸法に多少のあそび
があっても前面カバー30と受光体32に各々確実に密
着する。そして、このようにAF・ファインダ保持部2
8の筒部38を多少あそびを持たせて加工することによ
り、筒部38に受光体32や入射光制限部材33を組み
付ける際に、作業が容易になる。更に、入射光制限部材
33を形成するゴムが黒色であるので、入射光制限部材
33の内面での乱反射が抑えられ、測光精度が良好に保
たれる。
Similarly, the front edge and the rear edge of the incident light restricting member 33 are firmly adhered to the front cover 30 and the photoreceptor 32, respectively, due to the elasticity of the rubber, even if there is some play in the dimensions. The AF / finder holding unit 2
By working the cylinder portion 38 with a slight play, the work becomes easier when the light receiving body 32 and the incident light limiting member 33 are assembled to the cylinder portion 38. Further, since the rubber forming the incident light restricting member 33 is black, irregular reflection on the inner surface of the incident light restricting member 33 is suppressed, and excellent photometric accuracy is maintained.

【0030】なお、入射光制限部材を図4に示すような
形状にすることもできる。第2の実施形態における入射
光制限部材80は、受光体(図示せず)側の受光体絞り
81の中心が、垂直上方に寄せて設けられている。ま
た、入射光制限部材80の形状が、光軸に対して回転非
対称形状になるように、上面側だけ緩やかなR面になっ
ており、これに対応してAF・ファインダ保持部83の
筒部84も、上側の内壁がR面になっている。このよう
に、入射光制限部材80の受光体絞り81を、上方に寄
せて形成することにより、ローコストに下部重点測光が
可能になる。なお、この受光体絞りの位置を任意の位置
にずらして形成することにより、簡単に被写体の一部だ
けを重点的に測光することが可能になる。
Incidentally, the incident light limiting member may be shaped as shown in FIG. The incident light restricting member 80 according to the second embodiment is provided such that the center of the photoreceptor diaphragm 81 on the photoreceptor (not shown) side is vertically shifted upward. Also, the incident light restricting member 80 has a gentle R surface only on the upper surface side so as to be rotationally asymmetrical with respect to the optical axis. Also in 84, the upper inner wall is an R-plane. As described above, by forming the photoreceptor diaphragm 81 of the incident light restricting member 80 so as to be shifted upward, low-weighted photometry can be performed at low cost. By shifting the position of the photoreceptor stop to an arbitrary position, it is possible to easily perform light measurement with emphasis on only a part of the subject.

【0031】また、入射光制限部材80の上面側だけ緩
やかなR面にすることにより、組み立て工程において、
AF・ファインダ保持部83の筒部84に入射光制限部
材80を挿入する際に、入射光制限部材80の上下を逆
さに入れてしまうことがなくなる。そして、このような
入射光制限部材80も、柔軟なゴムで形成されているの
で、筒部84の寸法に多少のあそびがあっても、入射光
制限部材80は筒部84内で揺動することなく、内壁に
密着し固定される。
In addition, by forming a gentle R surface only on the upper surface side of the incident light limiting member 80, in the assembling process,
When the incident light restricting member 80 is inserted into the cylindrical portion 84 of the AF / finder holder 83, the incident light restricting member 80 is not turned upside down. Since the incident light restricting member 80 is also formed of flexible rubber, the incident light restricting member 80 swings in the cylindrical portion 84 even if there is some play in the dimensions of the cylindrical portion 84. Without sticking to the inner wall, it is fixed.

【0032】上述した2つの実施形態においては、入射
光制限部材はゴムで形成されているが、勿論、ゴム以外
にも、柔軟で弾性のある素材であれば、どの様なもので
も使用することができる。また、上記の実施形態では、
コンパクトカメラを例に説明したが、例えば一眼レフタ
イプのカメラやインスタントカメラ等にも本発明は利用
することができる。
In the above two embodiments, the incident light limiting member is made of rubber. Can be. In the above embodiment,
Although a compact camera has been described as an example, the present invention can be applied to, for example, a single-lens reflex camera or an instant camera.

【0033】[0033]

【発明の効果】以上説明したように、本発明によれば、
カメラの前面カバーに設けられた一定サイズの遮光窓の
奥に受光体を組み込み、前記測光窓を通過した被写体光
を前記受光体で受光して被写体輝度の測定を行うカメラ
用測光装置において、前記前面カバーと受光体との間
に、後端縁を受光体前面の受光面に圧着させ、前端縁を
前面カバーの裏面に圧着させるとともに、後端側に受光
面の露出範囲を制限する受光体絞りを一体に設けた入射
光制限部材を設けたので、測光に不要な外光の侵入を、
ローコストで確実に防止するコンパクトなカメラ用測光
装置を提供することが可能になる。
As described above, according to the present invention,
A photometric device for a camera that incorporates a photoreceptor behind a light-shielding window of a fixed size provided on a front cover of a camera and receives subject light passing through the photometric window with the photoreceptor and measures subject brightness. Between the front cover and the photoreceptor, the rear edge is pressed against the light-receiving surface of the front of the photoreceptor, the front edge is pressed against the back of the front cover, and the exposure range of the light-receiving surface is limited to the rear end side An incident light limiting member with an integrated aperture is provided to prevent external light unnecessary for photometry from entering.
It is possible to provide a compact camera photometric device that reliably prevents it at low cost.

【図面の簡単な説明】[Brief description of the drawings]

【図1】カメラの測光装置付近の断面図である。FIG. 1 is a cross-sectional view near a photometric device of a camera.

【図2】カメラの外観を示す斜視図である。FIG. 2 is a perspective view showing the appearance of the camera.

【図3】カメラの構成を部分的に示す分解斜視図であ
る。
FIG. 3 is an exploded perspective view partially showing a configuration of a camera.

【図4】第2の実施形態を示す説明図である。FIG. 4 is an explanatory diagram showing a second embodiment.

【符号の説明】 2 カメラ 3 カメラ本体 25 保持部材 26 制御基板 28 AF・ファインダ保持部 29 ギヤ支持部 33 入射光制限部材 33a 受光体絞り[Description of Signs] 2 Camera 3 Camera main body 25 Holding member 26 Control board 28 AF / finder holding unit 29 Gear support unit 33 Incident light limiting member 33a Photoreceptor aperture

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 カメラの前面カバーに設けられた一定サ
イズの遮光窓の奥に受光体を組み込み、前記測光窓を通
過した被写体光を前記受光体で受光して被写体輝度の測
定を行うカメラ用測光装置において、 前記前面カバーと受光体との間に、後端縁を受光体前面
の受光面に圧着させ、前端縁を前面カバーの裏面に圧着
させるとともに、後端側に受光面の露出範囲を制限する
受光体絞りを一体に設けた入射光制限部材を設けたこと
を特徴とするカメラ用測光装置。
1. A camera for incorporating a photoreceptor inside a light-shielding window of a predetermined size provided on a front cover of a camera, and measuring subject brightness by receiving the subject light passing through the photometry window with the photoreceptor. In the photometric device, between the front cover and the photoreceptor, the rear edge is pressed against the light receiving surface of the front surface of the photoreceptor, the front edge is pressed against the rear surface of the front cover, and the light receiving surface is exposed on the rear end side. A photometric device for a camera, comprising an incident light restricting member integrally provided with a photoreceptor aperture for restricting the light.
【請求項2】 前記入射光制限部材は、弾性体で形成さ
れていることを特徴とする請求項1記載のカメラ用測光
装置。
2. The photometric device for a camera according to claim 1, wherein said incident light limiting member is formed of an elastic body.
【請求項3】 前記測光窓の中心を通る水平な光軸に対
して前記受光体絞りの中心を垂直上方にずらすととも
に、入射光制限部材を前記光軸に対して回転非対称形状
にしたことを特徴とする請求項2記載のカメラ用測光装
置。
3. The method according to claim 2, wherein the center of the photoreceptor diaphragm is shifted vertically upward with respect to a horizontal optical axis passing through the center of the photometric window, and the incident light restricting member has a rotationally asymmetric shape with respect to the optical axis. The photometric device for a camera according to claim 2, wherein:
JP9153214A 1997-06-11 1997-06-11 Photometry device for camera Pending JPH112853A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9153214A JPH112853A (en) 1997-06-11 1997-06-11 Photometry device for camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9153214A JPH112853A (en) 1997-06-11 1997-06-11 Photometry device for camera

Publications (1)

Publication Number Publication Date
JPH112853A true JPH112853A (en) 1999-01-06

Family

ID=15557551

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9153214A Pending JPH112853A (en) 1997-06-11 1997-06-11 Photometry device for camera

Country Status (1)

Country Link
JP (1) JPH112853A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6763188B2 (en) 2002-07-10 2004-07-13 Fuji Photo Optical Co., Ltd. Camera photometer
JP2007101513A (en) * 2005-10-07 2007-04-19 Seiko Npc Corp Infrared sensor
JP2009250705A (en) * 2008-04-03 2009-10-29 Fujitsu Ltd Light guiding mechanism for illumination sensor and mobile phone

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6763188B2 (en) 2002-07-10 2004-07-13 Fuji Photo Optical Co., Ltd. Camera photometer
JP2007101513A (en) * 2005-10-07 2007-04-19 Seiko Npc Corp Infrared sensor
JP2009250705A (en) * 2008-04-03 2009-10-29 Fujitsu Ltd Light guiding mechanism for illumination sensor and mobile phone

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