JPH01128232U

JPH01128232U -

Info

Publication number: JPH01128232U
Application number: JP2065688U
Authority: JP
Priority date: 1988-02-19
Filing date: 1988-02-19
Publication date: 1989-09-01

Description

[Brief explanation of the drawing]

第１図は、本考案フイルム送り検知装置の実施
例の要部を示した斜視図、第２図Ａ，ＢおよびＣ
は、同装置の作動状態を説明するための平面図、
第３図は、本実施例を装着したレンズシヤツタ式
カメラを、裏蓋を除いて背面から示した斜視図、
第４図は、フイルム送り制御装置の回路をブロツ
クで示した回路図、第５図ＡおよびＢは、本実施
例のシーケンスを示すフローチヤート、第６図は
、各スイツチ、モータのオン／オフの関係を「Ｈ
」および「Ｌ」レベル信号で表わしたタイムチヤ
ートである。１０……カメラボデイ、１６……穴、２０……
検知ピン、２２……本体軸部、２３……突起、２
４……丸頭部、３０……スイツチ、３２……撓み
接片、３４……固定接片、４０……フオトインタ
ラプタ、４４……発光ダイオード、４５……フオ
トトランジスタ、４６……遮光板、５０……ＣＰ
Ｕ、５２……モータ、５４……モータドライブ回
路、ＳＷＦ……フイルム検知スイツチ、ＳＷＰ…
…パーフオレイシヨン検知スイツチ、ＳＷＷＳＴ
……フイルム巻上スイツチ。 Fig. 1 is a perspective view showing the main parts of an embodiment of the film advance detection device of the present invention, Fig. 2 A, B and C
is a plan view for explaining the operating state of the device,
FIG. 3 is a perspective view of a lens shutter type camera equipped with this embodiment, shown from the back with the back cover removed;
FIG. 4 is a circuit diagram showing the circuit of the film feed control device in blocks, FIGS. 5A and B are flowcharts showing the sequence of this embodiment, and FIG. The relationship between “H”
” and “L” level signals. 10...camera body, 16...hole, 20...
Detection pin, 22...Main shaft portion, 23...Protrusion, 2
4... Round head, 30... Switch, 32... Flexible contact piece, 34... Fixed contact piece, 40... Photo interrupter, 44... Light emitting diode, 45... Photo transistor, 46... Light shielding plate, 50...CP
U, 52...Motor, 54...Motor drive circuit, SWF...Film detection switch, SWP...
...Perflation detection switch, SWWST
...Film winding switch.

Claims

[Scope of Claim for Utility Model Registration] (1) A film winding means for winding the film by a motor, a film detection switch for detecting the presence or absence of film, and a film detection switch for counting the perforation of the film,
a film detection means for controlling the film winding means;
a movable pin that is always biased to move in the insertion direction and moves in and out of the perforation as the film moves; a movable member that reciprocates in conjunction with the movable pin; and a photo interrupter for generating pulses for counting perforation of the film, and the moving member is an actuating member of the film detection switch. (2) In claim 1, the movable pin is a detection pin provided on the camera body so as to be movable toward the perforation, and the detection pin is
The interlocking member is formed to stop at three different positions: when there is no film, when it is inserted into the perforation, and when it abuts the film between the perforations, and the interlocking member elastically biases the detection pin. A film advance detection device comprising a flexible contact piece, and a film detection switch configured with the flexible contact piece as one contact point. (3) In claim 2, the detection pin includes a main body shaft portion having a diameter that cannot be fitted into the perforation, and a protrusion formed at the tip of the main body shaft portion and capable of fitting into the perforation. Film advance detection device.