JPH0416438U

JPH0416438U -

Info

Publication number: JPH0416438U
Application number: JP5779390U
Authority: JP
Priority date: 1990-05-31
Filing date: 1990-05-31
Publication date: 1992-02-10

Description

[Brief explanation of the drawing]

第１図は、この考案に係るフイルム給送検出装
置の一実施例の要部構成を示す断面図、第２図は
、同上実施例を装備したカメラの制御系のブロツ
ク図、第３図は、第２図のブロツク図におけるフ
オトセンサの部分を主体に示す回路図、第４図は
、従来例と同上実施例におけるフオトセンサの受
光素子の受光出力波形図、第５図ａは、従来のフ
イルム給送検出装置におけるフイルムの非パーフ
オレーシヨン部のフイルム面の反射等による受光
出力の波形図、第５図ｂは、同上実施例における
フイルムの非パーフオレーシヨン部のフイルム面
の反射光等の受光出力の波形図、第６図は、この
考案における遮光壁先端をレール面より突出形成
した状態を示す断面図、第７図は、この考案に係
るフイルム給送検出装置の変形実施例の要部構成
を示す断面図、第８図ａは、第７図の実施例にお
けるフオトセンサの底面側の斜視図、第８図ｂは
、第７図の実施例におけるカメラ本体のフオトセ
ンサの取付部分の底面側の斜視図、第９図および
第１０図は、それぞれ異なる従来のフイルム孔の
光学的検出装置を有するカメラの要部構成の断面
図、第１１図は、従来のパーフオレーシヨンを有
するフイルムの給送検出装置の構成を示すブロツ
ク図、第１２図は、従来のさらに異なるフイルム
給送検出装置の要部構成を示す断面図、第１３図
は、従来のフイルム孔の光電的検出装置を有する
カメラにおける受光素子の相対光電流−距離特性
図、第１４図は、フイルム反射率の測定回路を示
す回路図である。３１……カメラ本体、３１ａ……レール面、３
１ｂ……素子受け面、３２……フイルム、３２ａ
……パーフオレーシヨン、３３……フオトセンサ
、３３ａ……発光素子、３３ｂ……受光素子、３
４……圧板、３４ａ……透光孔、３５……裏蓋、
３６……圧板ばね、３８……反射板、３９……遮
光壁、４０……給送検知回路、４１……中央処理
装置、４４……操作スイツチ、４６……給送用モ
ータドライバ、４７……給送モータ。 FIG. 1 is a cross-sectional view showing the main structure of an embodiment of the film feed detection device according to the invention, FIG. 2 is a block diagram of the control system of a camera equipped with the same embodiment, and FIG. , a circuit diagram mainly showing the photo sensor part in the block diagram of FIG. FIG. 5b is a waveform diagram of the received light output due to the reflection of the film surface of the non-perforation part of the film in the feeding/detection device, and FIG. An output waveform diagram, FIG. 6 is a sectional view showing a state in which the tip of the light-shielding wall in this invention is formed to protrude from the rail surface, and FIG. 7 is a main part of a modified embodiment of the film feed detection device according to this invention. 8a is a perspective view of the bottom side of the photo sensor in the embodiment shown in FIG. 7, and FIG. 8b is a bottom side view of the mounting part of the photo sensor of the camera body in the embodiment shown in FIG. 7. 9 and 10 are respectively cross-sectional views of the main components of a camera having different conventional film hole optical detection devices, and FIG. 11 is a perspective view of a conventional perforated film feed FIG. 12 is a block diagram showing the configuration of a film feed detection device. FIG. 12 is a cross-sectional view showing the main part configuration of a still different conventional film feed detection device. FIG. 13 is a camera having a conventional film hole photoelectric detection device. 14 is a circuit diagram showing a film reflectance measurement circuit. 31...Camera body, 31a...Rail surface, 3
1b...Element receiving surface, 32...Film, 32a
... Perflation, 33... Photo sensor, 33a... Light emitting element, 33b... Light receiving element, 3
4...Press plate, 34a...Transparent hole, 35...Back cover,
36... Pressure plate spring, 38... Reflection plate, 39... Light shielding wall, 40... Feeding detection circuit, 41... Central processing unit, 44... Operation switch, 46... Feeding motor driver, 47... ...feed motor.

Claims

[Scope of Claim for Utility Model Registration] (1) A camera body having a rail surface for guiding the film running, the film being pressed against the rail surface so as to be able to run, and each perforation when the film runs. a pressure plate with a transparent hole bored at a position facing the film, a film automatic feeding mechanism that uses a motor to wind up the film, a reflector placed behind the pressure plate, and a reflection plate facing the transparent hole. is provided in the camera body, and as the film travels, when the perforation comes to a position opposite to the light transmission hole, the light from the light emitting section passes through the perforation and the light transmission hole. a photo sensor that detects the perforation by receiving the reflected light reflected by the reflecting plate in a light receiving section; and a light shielding section provided between the light emitting section and the light receiving section between the film surface and the photo sensor. 1. A film feeding detection device comprising: a wall; (2) The film feed detection device according to claim 1, wherein the light shielding wall is integrally formed with the camera body.