JPS5883828A - Film detector - Google Patents

Abstract

PURPOSE:To check the winding when a film is not loaded and to prevent the automatic rewinding just after film loading, by providing a roller which detects whether the film is loaded or not and making the automatic rewinding unoperated when it is detected that the film is not loaded. CONSTITUTION:A detecting roller 18 which detects whether a film is loaded or not is provided on a spool 17. A photocoupler 35 which detects the state of transportaion of the film is provided in the transportation path of the film. Since the circuit is so constituted that the photocoupler 35 performs a prescribed operation and the automatic rewinding is made unoperated when a switch SW1 is turned off by the detecting roller 18, the winding operation is performed to confirm the operation of the camera by the depression of a shutter button when the film is not loaded. Just after the film is loaded, the automatic rewinding is not performed because the switch SW1 is turned off by the detecting roller 18.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a camera with an automatic rewind device that electrically detects the film advance state and automatically starts rewinding the film when the film advance is no longer in a steady state.
This is related to a service detection device.

Conventionally, this type of device is very convenient because it automatically rewinds the film if it runs out during film winding, but if you want to check the camera without loading the film, This was very inconvenient because the camera detected that the film was not advancing at a steady rate and started rewinding, making it impossible to check whether the film was moving normally.

Furthermore, in cameras equipped with an auto-loading mechanism, loading a cartridge and placing part of the film leader on the spool automatically winds the film, but cameras with an auto-loading 6 device When an automatic rewind device of the same type is installed, if a long film with a partial leader notch is used, the 4th leader's cutout may come to the film advance detection mechanism immediately after loading the notatrone. If winding was started in this state, it would be detected that the film advance was not in a steady state, and the system would start rewinding, causing problems such as unloaded film being wound into the cartridge.

The present invention eliminates the above-mentioned abnormal operation when there is no film by providing a film detection means, and also by considering the arrangement of the film presence detection means and the film winding state detection means. The U objective is to eliminate the trouble of returning the product.

Hereinafter, the actual example will be shown in Figure 1ilKI! That's what I say.

FIG. 1 is a configuration diagram of the main parts of a camera to which the first embodiment of the present invention is applied, and FIG. 1 is a perspective view of the Twitch w4.

Figure 3 is a perspective view of the back *St. The pigeon is a motor, and a pinion gear 3 is attached to the tip of the shut via a flick v*y panel.The rotation of the motor pigeon is through gear 41.
It is decelerated by gear 4 and transmitted to gear 7. Gear t is the base plate that meshes with the gag and rotates around the gag's pivot turtle! installed on top. Therefore, depending on the direction of rotation of the motor pigeon, the gear t is a three-stage gear 10°//, l
- It is also possible to mesh with the gear core. The gear lo extends through the shaft 10& of the gear 10 to the film advance sprocket 7.7.

The gear/J transmits rotation to the spool/7 through the gear l@is, ysuy1 and the spring 16, and the stool/rik is S.
In part a, the turtle is thrown, and the film detection roller lf, which is supported by the support member/fK, is brought into contact with the outer periphery of the small noise part 17* by being pulled by the spring Jθ. Film detection port. - When the spool/fK Twirm 3 is wound, it is pushed to the outer periphery of the film 3, and at this time, is it sweet? IW
, turns on. Gear / , f rotation at the same time! The 4th gear 3 has a cam Jj & at the top and is connected to the V yatsuter (not shown) and the automatic focus mechanism Char 01a structure. The shaku-feeding rigid force 3b is used -C,
Paneko! The fixed length feed lever a that is pulled fK comes into contact with m.

When the protrusion at the tip of the concave part kj1 of this Omco Jb falls down, is it sweet? When one bird is turned off, the rotation of the rotor stops and the standard length j19 is completed.4 gear a? Transfer the rotation sequentially to GAKO t, KO V, SO, SI, and use the film winder fitted in the center hole K*S of the cartridge 3J to set the fork 3J to 11@. A photocoupler 33 is provided at the position where the perforation *y$/ of the film 3 # passes through, and the perforation y reference 1 of the film 3# passes through the photo coupler 33. Output the signal once @IC. A counter drive gear O is provided above the gear 10 via a shaft 410 &, and a single rotation of 71g of the sprocket/J unloads a force of 1 gear 41! The counter 36 is advanced by l frames via o and gear 4IJ. A convex portion J4at11- is attached to the J#lI edge of the counter 3≦, and when the counter J4 points between "8" and rlJ, the convex portion 74a or the convex attached to the tip of the switch 8W itself is attached. Press section 37 &.
Turn off switch 8W. Also, there is a convex part J9 on the back shank J9.
a, and when back *J9 is closed, switch 8W,
Press the convex @ J l a to turn off SW4.

Next, a process for constructing the first embodiment of the present invention, HI3, will be explained with reference to the drawings.

11# is a JK7 lip flop with a fill five-fold opening #11
It is set during spring upper middle 1 air feed, and the output terminal Q outputs a high level signal, and the input terminal J is a control path terminal (not shown)! , or sand, and the film winding number is input to input child J.

A clock pulse output circuit (not shown) is connected to a talc pulse input terminal aP&:h, and a talc pulse input terminal is input thereto.

The output terminal of the OR circuit 04 is connected to the input terminal Km.
1! I! When the power is turned on or at other necessary times, a short-term high level signal is input, and one-way JK flip r
The output terminal q of r is connected to the input terminal to the AND circuit M, the input terminal of the AND circuit Ds, the input terminal of the AND circuit M, and the input terminal of the OR circuit M. I met Jx
The output terminal q of the Tsuritsubu flop FF is the input terminal of the or ago! 1 - be done. O- is an OR circuit, which applies an alternating force when film tension is detected during film winding.The output terminal Q of the JK flip-flop νν is the input terminal J of the JK flip-flop FF, and the OR circuit. It is connected to the input terminal of the circuit 110- and the input terminal of the monostable multipipe rake 0-.

OR, is the first circuit that outputs the ^repel signal at the end of winding and winding stem, and its output terminals are terminals 'r, Kl! of a control circuit (not shown). Bowl 7)/F-
The output terminal to the circuit is connected to the input terminal of the OR circuit O-. The output terminals of the A VV circuit D are the first ll0- and O
Grounded to the – input terminal.

The FF detects the tension state with the JK Tsuritsubu flop, is set, outputs a high-level signal to the Q terminal, starts winding, is reset by the film winding switch SW, and sends a low-level signal to the Q terminal. Output.

A terminal T of a control circuit (not shown) is connected to the reset input terminal of the JK tritub flop FF, and an input signal is input when the power is turned on or at any other desired time.

A clock pulse generation circuit (not shown) is connected to this clock pulse input terminal CPK, and receives a clock pulse signal. Inverter, road! The output terminal of
The input terminal of the flip-flop FF, the input terminal of the AND circuit M and the input terminal of the JK flip-flop 7''FF, the input terminal of the OR circuit 0, and the reset input terminal lK of the D flip-flop FF. - to be done.

The output terminal of the JIC trip flop FF is connected to the input terminal of the 1st circuit M-, the input terminal of the buffer 11111111%, the input terminal of the 1st circuit O-, and the input terminal of the 7111 circuit IF. It will be done. Buffer circuit IF・
The output terminal of is grounded through a resistor and a light emitting diode Fu. g resistance 1g is the current limiting single-layer Ii resistance light emitting diode LllliD@ is the display means in the winding tool, 4 mm is 1y
In the lead circuit, the film winding is disassembled.

JK flip flop F? - is a circuit that outputs a signal of HI level from the output terminal q, and then outputs a signal of HI level.

O- is an OR circuit, and the Jl Tsuritubu flop FF outputs the signal of the heirepel, or the li! It's a seagull. Its output terminal is connected to the input terminal of the buffer circuit -r.The zero-order KAD is connected to the input terminal of the buffer circuit -r. It's am that makes me want to do it. switch l
One terminal of W is grounded, and the other terminal is connected to the inverter circuit l.
@11111VDD4m connected to the input terminal of -'-
Inverter i! through the resistor. The resistor connected to the input terminal of 1lllI- is a 4y converter path! It is a pull 1 knob N resistance of Toshi.

The output terminal of the inverter circuit IN is the inverter circuit IN.
, and the input terminal of the AND circuit D1. The output terminal of the AND circuit is buffered once! I
A buffer circuit 11F connected to the input terminal of IF,
The output terminal of is connected to the pace of transistor T-.

! - is a transistor for switching which turns on and off the light emitting diode u1 constituting the photo cube two 3j. The emitter of transistor T- is grounded. The power supply VDD is grounded to the collector of the transistor TIL1 via the resistive island and the light emitting diode L1. L
II% is a light emitting diode-F1, Cub, 2, 7□ structure, Sha%j! This resistor is a current limiting resistor input from the current gvDD. Ta2 is a phototransistor that acts as a photocoupler 3j together with the light emitting diode 1 and ID. 3 is a photocoupler, and a light emitting diode L D4
And Huotransistor! 0, which is a means for detecting the moving state of the film J-tei from k, when detecting the moving state of the film J-tei + -v g y reference l moving between - and k. - @l1flllVtjD, which is grounded, is the input terminal to the inverter circuit 1 and the transistor ! through the resistor island. - Connected to the collector of -.

The resistance - is the pull-up layer resistance of the inverter III)%. The output terminal for the inverter 1inx is connected to the input terminal of the buffer IF, and the resistor -
and is grounded through a row of diodes DI 111m.

The resistor IA and the resistor IA are IIN, which mediates the output signal from the IA path IN. This is a means for clamping the negative output of this differential waveform. The output terminal of the buffer 11111F is the input terminal of the OR mgiio- and the clock pulse input terminal of the D flip-flop RR. ? When I got caught up in
-IIry switch means.

Next, KFF is a D-tree flop circuit that turns on and off to detect perforation deterioration. ! The L-inversion output terminal Q is connected to the input terminal DK.

The output terminal Q is connected to the input terminal of the ANDIgl circuit D, and the output terminal of the Ayy circuit D is connected to the input terminal of the rose 211g circuit IF, whose output terminal is connected to the resistor and the light emitting diode LID. , is grounded through. The resistor is a current limiting resistor and is a means for indicating that the light emitting diode LIQi is on. The AND circuit Ds is a circuit that outputs a high level signal only during winding.

The next KOR is an OR circuit that outputs a high-level signal to reset the trigger circuit CT with either the pulse signal detected by the perforated V1y when it is not winding or during power-up. Line 5#BUIll. The output terminal of the OR circuit OB is the Kakunta circuit CT,
The reset input terminal RK is connected. The CT-low-stutter circuit detects that the perforation is less than 1Ily. The clock pulse input terminal cp6c@- is connected to the clock pulse input terminal not shown in *fllJ.

The carry output terminal C is connected to the terminal JIC of the JIC tree prop fF. Fv.

is an am that detects the bumps on the film using a JK Tsuritsubu flop. Il# No clock pulse generation 1
The gull is connected to a clock pulse input terminal, and is connected to a terminal of a control circuit (not shown), ie, a terminal of a control circuit (not shown).

The output terminal is connected to the input terminal J# of the JLC flip-flop FF, the input terminal of the OR field 1IO-, and the input terminal of the monostable multivibrator O region. The inverting output terminal Q is connected to the input terminal of the AND circuit D,
is a circuit that detects that the switch 1% is turned on when the winding is not in a tensioned state during winding and outputs a signal for repelling. Inverter circuit! The output terminal is the input terminal K111m of the WF circuit D.

The output terminal of the buffer 711111IF is a transistor!
Connected to the pace of 4. Is the T island a transistor that turns on during winding and winding? )/g. The Ivy is grounded and the switch terminals T4 and T are connected to the collector.
The output terminal of 4 is connected to the base of transistor Ti. TI is a switching transistor that turns on during unwinding.

The emitter is grounded and the power supply vlm! is a transistor through a relay! − is connected to the collector.

The relay is a switching means that acts on the control terminal of the switch SW- by a signal from the TY status. 8
The duck is a switch means for switching between forward and reverse rotation of the machine.

wIIllllvDD is sweet Pa duck's terminal T, and!
– is connected to. Voltage II VDD is connected via resistor
, p<-ta circuit! input terminal to and switch lW1
mm+ is connected to the terminal. Resistor - is inverter circuit IN,
This is a pull-up resistor. Are both the other terminals of the switch IB bird switch? One terminal of the soter pigeon, which is connected to the two control terminals of @w, is connected to the terminal of switch 8W. Further, other terminals are connected to the terminals of the switch 11 and aW4. More Sui 2? The terminals of IWs and IIW4 are connected to the terminal of switch 1.

8W is a switch that is turned on when winding is completed. The 1-cho is a switch that turns off when the back cover is opened in the SWITCH T, and the L-Tori is a switch that turns OFF until the air feed is completed. So-p-pigeon is a 0-order single anchor jI which is a driving means that winds up by forward rotation and winds the winding stem by reverse rotation.
! The output terminal of the multivibrator O is grounded via a resistor and a light emitting diode U. Resistance - is the current control layer resistance.

The light emitting diode LIC11% is a means for displaying the so-called tension state in which the film slips after winding is completed.

Next, the operation of the device according to the first embodiment of the present invention having the above configuration will be explained based on the circuit diagrams shown in Figure 1, Figure 1, Figure 311, and Figure 1. -do.

First of all, the film 3, that is, the Patrone Js is the camera K1.
This is an explanation of the operation when the shutter release button y is pressed with 1L loaded and no C, and the back 11J is open.When the back *SV is open ■, switch 8W4 is set to y.
cuff number 3 is "8" by a mechanism not shown.
The position Kl [is being held. Therefore, the protrusion 3ri1 of the switch 8 is turned off because it rides on the protrusion 341 of the kakunta 34. Also, since the cylinder 33 is not loaded in the camera, the film inspection roller comes into contact with the outer periphery of the rope flange part 771 on the spool, and the camera is not loaded. When IW is off and you press the shutter button,
The automatic focus mechanism works. When the shutter operation is completed, a member (not shown) moves the fixed-length feeder clockwise (when viewed from the top of the camera, the same will apply from now on).
Rotate and turn off switch IW. After this, a film winding signal is sent from the control circuit (not shown) to the terminal! , is input to the input terminal JK of the JK flip-flop FF, and the JK flip-flop FF outputs a signal at the level of 1 to the OR circuit 0N14 from the output terminal q. The OR circuit 0- thereby outputs a high level signal, and this signal passes through the buffer circuit IF and 8. Transistor〒R
Turn on 1.

At this time, the switches at both ends of the soter dove are connected to the te side, and the soter dove rotates in the counterclockwise direction. The first rotation of the pigeon trap time needle is transmitted to the main plate 9 on which the Gyaku axis turtle K11ii is installed via the gear 2 controller 47.
This is k Yoji f19 ■Imperial Self 1! The wooden shaft supported by the gear 10. //, meshes with /ko. This gear °l and gear 10. Due to the meshing of // and /J, the Nuprorocket 13 fixed to the shaft 10 & of the gear 10 is
! through f [spool l is both in the film winding direction k1
After one rotation, the charge system charges the battery using the cams J, 7 & installed on the Gyaco 3. During this time, the Suitsudayi is off, so it's a good parter circuit! The input signal of Toshi is ^Irepel, and the signal of ^Irepel is Iy pattern 11111
It is inverted at 1- and becomes low level, and this low level signal is an inverter circuit! , it is inverted at ^ level. This ﾆﾆ level signal is output to the OR circuit 0RIK, and the OR circuit O- is connected to the ﾆﾆ level signal.
111ets, the output signal from the carry output terminal C of the converter path Ct will never go to the level A.
The high-level output signal of 111- is input to the input terminal KK of the JK flip-flop FFs, and the JK flip-flop FF receives the low-level signal from the neutral terminal q to the JK flip-flop FF.
Input terminal J of Tsuritubu flop r9 and OR circuit 04
Then, a signal of level ^ is outputted from the 1-inverted output cursor Q to the y-to circuit D4, respectively. As charging progresses, the member that rotates the fixed-length feed repercoder in the direction of the hour hand is also charged, and the fixed-length feed repercoder moves forward.
CK rotates in the direction of the hour hand.

Then, when the film, 7#f)/': Ima winding is completed, the tip protrusion of the fixed length feeding repercoder moves to 1 of the camco 3b.
sec contact and switch-bird turns on. This is a more inverter circuit than k! The input signal of Toshi becomes a low level, and this low level signal is inverted by the input circuit IN4.
A level signal is input to the AND circuit AD. Since the AND circuit D4 receives high level signals from the output terminal Q of the JK flip-flop FF, all the input signals of the AND circuit D4 are high level, and the input signals of the AND circuit D4 are high level.
Iifi signal D4 outputs the level signal to the OR circuit oB,,
Output to oM.

As a result, the OR circuit 0ILs receives the ^ level signal, that is, the 2y signal at the terminal! At the same time, the OR circuit O1l outputs the input terminal KK of the JK flip-flop FF, which is an irregular signal, and the JK flip-flop FF outputs a low level signal from the output terminal Q. Oy-go4x output. On the other hand, JK
A low level signal is input to the input terminal J of the flip-flop bushing R.

The JI flip-flop rν outputs a low level signal from the output terminal Q to the OR circuit O-. Therefore, the first circuit O- outputs a low level signal, which passes through the buffer circuit IF- and turns off the transistor T-. At the same time, the switch S- is turned on to connect both ends of the shutter, so that the shutter suddenly stops and winding of the film is completed. During this time, the drive gear 0 is disengaged from the gear of the cuff 34, so the cuff ν 36 will advance, and therefore the 'Sweet PI bird' will not turn on. The camera operates normally even if you press the V button with the back *SV open, so you can easily check the camera's operation.

Next, we will explain what happens when you press the V-YATTER button when film J4I, that is, cartridge 33, is not loaded in the camera and the back cover J9 is closed. 391 turns off the switch 8W4, and a mechanism (not shown) turns off the kakunta drive gada O.
The cuff yoke 34 is engaged with the cuff 34. However, as in the previous case, since the film 3 is not loaded in the camera, the film detection roller /l is located at the S@ section of the spool /? lLK is in contact with switch ff,
It's off. If you press the V-YATTER button in this state, the winding will be performed in the same way as when you press the V-YATTER button with the back cover 39 open, but the winding will not end. Even if the protruding end of the reperco-tei that feeds a fixed length comes into contact with the camco jbf) OJIIIK and the switch 8h is turned on, the back @ 39 is still in the closed state.
The switch S remains off, and the switch 8 is also turned on because the cuff 36 is close to the crest position.

therefore.

The input signal of the input circuit 1N4F) is at level ^, and the signal of low level is input to the input circuit D4, and the AND circuit D4 inputs the signal of -V level to the first circuit O-.
Output to. Since the output signal of the pre-charged output terminal of the J-section flip-flop νν, which is another input signal of the line 711IO-, has a low level, the first line OB1 is a low-level signal. The output signal at the output terminal q of the JK flat flop FF is a signal similar to II. Therefore, in TryCX TB, the motor is energized until on σ1, and both ends of the motor are not exposed to WaS.
The gear // runs in the film winding direction, and the protruding end of the fixed length feed lever a is pushed out of the recess of the cam 3b, the clock hand is set to 1111 pKllll, and the switch 8 is turned off again. When this is twisted and crawled, the cuff 34 is moved to the cuff yoke V-ripe gear WOwc (advanced).
/J position, the engagement between the protrusion 3a of the switch 3 and the protrusion 834% of the kakunta 36 is disengaged [switch SW is turned on]. Thereafter, when the protruding end portion of the fixed-length feeding repercoder falls into the recess of the camcoder 3b, the switch 8 is turned on, and a repercussion signal is output to the AND circuits D and K. Therefore, all the input signals of the AND circuit D are at the high level, and the AND circuit AD receives the high level signal as the first signal.
circuit oi4. Output to oB. The OR circuit 0- outputs a high level signal to the input terminal of the JK flip-flop FF.

outputs a low level signal from the output terminal Q to the OR circuit OR. OR circuit OR, /) Since the other input signals are also low level, the output signal of OR circuit O- changes from high level to low level, turns off transistor T1m, stops energizing the motor pigeon, and Both ends of the circuit are short-circuited, and sudden braking is applied to the motor starter MI#IC, and the OR circuit O
Terminal from – to a control circuit not shown! , an end signal is output. The operation so far corresponds to the blank feed of the film, and even if the film is not loaded,
It is possible to easily perform the operation of film feeding. In the later wh works, the switch S town is on instead of the sweep 1 swipe being off, so except for the cuff y 36 progressing, it is exactly the same as when the back yast is opened, and the film 3 You can check the operation of the camera even if the camera is not loaded.

Next, the operation when the film J4', that is, the part a rate 33, is loaded in the camera will be explained. When the film 341 is loaded into the camera, the back Wt 39 is closed, and the shutter button is pressed, the film 341 starts to be fed in the same way as in the case of the pigeon house in which the film 341 is not loaded into the camera. During this time, the spool of lie 5 = AJ is tilted from the sprocket /JK, and the spool /? is tilted by the auto loading jig mechanism (not shown). wrapped around. Film 3 da spool/? (and the film detection roller/l
teeth.

Part 511 of the spoop kit/1 The contact with the turtle is lost and the clockwise motion is turned, turning switch 8Wl over.

When switch If is turned on, it is an inverter circuit! The input signal of N becomes low level, and a signal of 7)/F@yomimuham-i level is output. Since a high-level signal is output from the output terminal q of the JK block flop FF1 to the other input terminal of this circuit AD, the AND circuit AD transmits the high-level signal to the buffer circuit IF,
Transistor through! This causes the transistor Tl to turn on and the photocoupler 3j to start operating. The photocoupler 33 outputs a periodic on/off signal from the transistors T&4 to the inverter circuit IN,k when the part overlay vgy1/ of the film 3da passes through the photocoupler 33. Inverter circuit IN
, the on and off signals inverted by
F, and is input to the OR circuit ll0-.

As long as a JllJQI-like on/off signal is output from the photocoupler 3s, a high-level signal is input from the output terminal of the OR circuit o4 to the kakunta circuit CT, f) the reset input gate. The output signal from the carry output terminal C of the input terminal CT never reaches the level 'kK'.On the other hand, the output signal from the carry output terminal C of the D flip-flop FF and the output terminal CP of the carry output terminal CP Keζ perforation 1111
y reference l passes through the photocoupler 3S ◆ A differentiated signal corresponding to the periodic OV and Otsu signals outputted from IIK is input via Paratour-Uro-r, and from this k, D flip-to A repeating signal of high level and low level is output to the output terminals QTh and D of the tube FF4.

And the input signal to the other input terminal of the yy circuit!
Since the output signal of the output terminal Q of a certain J-ward floating block r is at high level, the yFI circuit M buffers the signal corresponding to the repeating signal of the high level and a- level to the resistor @IIIF. Then, light emitting diode 14
Output to. From this point on, the light emitting diode L- blinks to display "Film winding". Furthermore, book 1lW1
In the fourth embodiment.

Film inspection @a-ler/l and photo coupler 3! Both are arranged to detect the perforation v * y * t of the Oka double. Even in the case of film 3, when film 3 is wound on spool 17, coupler 3
j is perfore-y*y! / will not go undetected, but photocoupler 3! If f is always installed at the position where a part of the leader of the film 3 da ends when the film detection roller it detects the film 3 da, then the above arrangement of the photocoupler 3j and the film detection roller tt is different. It's okay.

Now, load the cartridge 33 into the camera and
Just by closing the 39 and pressing the shutter button y once, the film 3 will be automatically advanced to the shooting position I, and at the same time a message will appear indicating that the film 3 is being passed through to the shooting position. You can easily and safely manipulate photos. From now on, when you press the shutter button, the autofocus mechanism and shutter operate in the same way as when film 3 is not loaded, and then the spool 17 and sprocket 1
3 rotates in the upward direction # of film winding and stops after rotating for 7 frames C (actually winding the film 34I in this case). During this time, the light emitting diode LID displays "Film winding" and stops, and the cuff holder 34 advances by one frame. Also, during this time, the cartridge 3J or the film 3 is pulled out, so the fork JJ It is rotated in the direction of the wind hour hand, and this rotation is transmitted to gear 3i, sa miko, kot, koku,
Since the gear t and the gear t do not mesh properly, there is no gap between them.However, as the shooting progresses and the film J-tei disappears while the film is being wound, the load on the feeder increases. i! A slip occurs between the spring gear and the pion gear J, causing the sprocket 13 to slip from the position of the film 3.
In this way, the film 34I- is not fed while there are scrapes or bumps between the Flixi My Paneco and the pinion gear J to prevent damage to the Foley Vv174g/, so the output signal of the photocoupler 33? The final signal is at a fixed level, either the pay level or the low level, and the signal obtained by differentiating this is not output, and the input signal of OR ai*o- is at the low level.

Since the switch 8Wi is 1%, the input signal of the inverter circuit IN is at a low level, and the output signal from the inverter circuit IN to the OR circuit 0 is at a low level. The output signal of the inverting output terminal Q is also low level.In the past, the reset input terminal BK of the color circuit CT did not receive the pay level output signal, that is, the reset signal from the OR circuit O-, and the counter circuit CT After a certain period of time has elapsed, a pay level signal is output from output terminal Q. JK
This pay level signal is input to the input terminal JK of the flip-flop FF, and the output signal of the output terminal q of the JK flip-flop FF is at pay level 1.The output signal of the inverted output terminal Q becomes low level. The output signal of this output terminal Q is input to the OR circuit OR, and the OR circuit 0- outputs a signal at the input terminal KK pay level of the JK tree flop FF. When the level signal is input to the input terminal KK8, the JK trip flop FIN outputs the OR circuit 01% K, which is a pay level signal, from the inverted output terminal Q, and as a result, the OR circuit 0 cuffs the pay level signal. The reset input terminal RK of the relay circuit CTl is output.

From now on, the reset input terminal I of the output I7y circuit CT
When the K beam set signal is input, the counter/circuit C?
, is in reset state 1. Also, a pay level signal is output from the output terminal Q of the J[tritube flop FF] to the monostable multipipe rake O, and the monostable multibump plater OM outputs a pay level signal for a certain period of time.

This signal is outputted from the light-emitting diode FLIDIK through a resistive circuit, and the light-emitting diode u1 is turned off for a certain period of time to display "FILM EN V". Furthermore, the pay level signal from the output terminal q of the 4CJK flip-flop a-tube FF -1JK
The input terminal JK of the flop Fν, J
K flip-flop FF buffers the pay level signal from output terminal Q16-! 1II11F4# and OR circuit OI! 4 is the sutra buffer circuit■ν.

Output to. With this, you can try out! - and T-o,
I'm so excited! 1. Switch 8 is the terminal due to the relay LtK connected to the ring! When the motor M is switched to the 1 side, current flows in the direction opposite to that during film winding, and the motor moves in the direction of the hour hand K11l. At this time, the road **II for the motor worker is opened, so it does not matter whether the switch B town is y or off. This clockwise rotation of the motor pigeon is transmitted to gear 7 via pinion gear 3 and gear @ momme 6, which rotates the main plate D in the direction of the hour hand and transfers gear t to gear 10. //, disconnect from the mesh with /, and mesh with the gear body. The gag's turn is gear genus 27.
, -g, and ko9.30.3/, the forks 3 are rotated clockwise and the film 3 begins to be wound. During film rewinding, the sprocket/
3, therefore the counter drive gear 4IO rotates in the direction of the hour hand, and the counter 36 rotates in the opposite direction K[l! The spool rotates once, and the film J4' also rotates the spool clockwise, and this rotation is controlled by the gear/! , /4I, /co, and the rotation of gear 10 does not interfere with the rotation of gear lco.

Furthermore, since the Gyaco 3 for charging and fixed length feeding does not move at all even when the film is rewound, the charging system parts and fixed length feeding lever 2 da are connected to the cam A3 turtle or JJt).
It won't get stuck and stop moving, and
During this time, the high level signal from the output terminal Q of the JK flip-flop FF was buffered by m%! IF・and m
The light-emitting diode IJDiK outputs the i1 message, and the light-emitting diode FLI- lights up to indicate "film winding" II.
& show. Buoy #4 rewind progresses and Kakunta 34 is r/J
When it comes to the lower position, the protrusion IIJ of switch 8Ws raises the protrusion JA&K11I of J4 and switch I turns off, but the circuit does not do anything. After this, film rewinding ends. When the film 34c is released from the spool J//, the film detection low tool lt detects the narrow diameter part of the spool/? &KIm contact, switch 8 horse turns off. When the Suidechi 8wI is turned off, the input signal to the AnF field module is ^repel by the input circuits IN, # and IN, and the other input signals of the AyFil path module are as follows. The output signal from the output terminal Q of the a-tube FF is also at a level.

The input signals of ANDkiljlA- are both at the level A) /Fil, and the input signals of A) /Fil are connected to the OR path 01. The OR circuit O- outputs a level signal, that is, an output signal, to a control circuit (not shown). , and then output. At the same time, JK Clipprop FF
, input terminal tX is also input with a high level signal, and JK
The flip-flop FF sends a low level signal from the output terminal 9 to the OR circuit O14 and the buffer circuits IF, IF
, output to. On the other hand, the output signal of the output terminal Q of the JK flip-flop FF is low level, and the OR circuit O
- outputs a low level signal to the buffer circuit IF1. Therefore, transistors 'rR and TR1 are both turned off, magnetization to motor M is stopped, relay L is turned off, switch 8 is connected to terminal T, and motor pigeon stops in the film winding state. do. At the same time, the light emitting diode LID for displaying ``film rewinding'' disappears, and *a ends.

As explained above, when the film ends, the photocoupler 35 detects that the on/off output signal is no longer repeated and automatically starts film rewinding. Since it is now possible to stop the film 4il unfolding operation at the same time, there is no need to rewind the film after the machine has finished winding the film, which is very convenient. In addition, each operation such as ``Film winding'', ``Film winding finished'', and ``Film rewinding'' is displayed with a light emitting guide and aud, so you can shoot with confidence.

Next, the first embodiment of this book-1 will be explained.

Figure S is a structural diagram of the parts in which the device of this embodiment is applied to poultry meat, and Figure 6 is its titn. Instead, it uses a sprocket and a switch that turns on and off as the sprocket rotates.

Since the automatic rewinding device according to this embodiment has almost the same mechanism and operation as the automatic rewinding device according to the first embodiment described in vIi, the different mechanisms, circuits, and operations will be explained below. . IO is the film transfer detection sprocket fixed to the reset 100, and the film 34! The teeth are arranged so as to penetrate the parts orage wy41/. Further, a kakunta drive gear tO& and a cam tOb are fixed to the V-yaft t00, and the counter drive gear 10 is driven by the rotation of the sprocket t0, and the cam tOb is also rotated at the same time, turning on the switch 8wI. Turn off. That is, sprocket g
o, -v'rytotO*, *At0b, xIttsuchisbird is the photocoupler 3 of the first embodiment! perform an alternative action. Furthermore, in this embodiment, the back 111 of the first embodiment described above is
A switch s duck that detects the cartridge 33 is provided in place of the switch Sw4 of the cartridge 39, and when the cartridge 33 is loaded in the camera, the trunk detects whether the cartridge 33 is a sweet? 8
Press the tip of W, switch 8W, and turn it off. The difference from the seventh embodiment on the 0th order circuit, which serves to turn on IW and send 7 frames, will be described. The photocoupler 35 and the transistor T in FIG.
The aforementioned switches 8W and 5 are provided in place of the buffer circuits IP, , and the AND circuits.

In this embodiment, the sprocket tO does not move at all unless film is loaded in the camera.

If the back cover 3t is closed without film loaded, #1/→
Contrary to the above-mentioned embodiment of the figure, it becomes /2v feed,
This saves electricity compared to the case of dry feeding. Also, when rewinding the film, the 4 switch ti repeatedly turns on and off, so
It is a good idea to flash the light emitting diode 5 to indicate the winding of the film even when the film is being wound.

As explained above, by using the film detection means, the camera can be operated normally even when there is no film, and the camera can be easily checked.

Further, by properly arranging the film presence/absence detection means and the film winding state detection means, it is possible to prevent the trouble of rewinding the film immediately after loading.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram of the main parts of a camera to which the first embodiment of the present invention is applied, Fig. 2 is a perspective view of switch SW4, and Fig. 3 is a perspective view of switch SW4.
The figure is a perspective view 1 of the back cover 39, the figure 5 is a circuit diagram of the circuit constituting the device of the first embodiment of the present invention, and the figure 5 is the circuit diagram of the circuit constituting the device of the first embodiment of the present invention.
FIG. 6 is a circuit diagram of a circuit constituting the second embodiment of the present invention. 33, za01zaObszaOc, swa...
... Film transport state detection means, /1r, /9.20. sw,・・・・・・・・・・・・
End of film rewinding''□ End detection means, ＃／山山山...Par 7 oration 1 LED,
・・・・・・・・・・・・ ``Film winding center display means, LED, ``7-Ilm winding complete'' display means, LED 3.・・・・・・・・・
...Display means for "film rewinding", //...
・・・・・・・・・Spool patent applicant Canon Corporation.

Claims (1)

[Claims] 1. Film transport state detection means for electrically detecting the film transport state of an electric drive device of a camera that transports the film by electric drive is provided, and a signal from the film transport state detection means is provided. An automatic rewind device of a camera that stops the film winding operation and automatically rewinds the film when the steady state is lost is provided with a film presence/absence detection means, and this film presence/absence detection means detects the absence of film. 2. The film detecting device according to claim 1, wherein said film detecting device is characterized in that said automatic rewinding device is deactivated if this occurs. 3. The film detecting device according to claim 1, wherein the film detecting means is also a film rewinding operation stopper. France: When the film detection means detects the presence or absence of a film, the film transport state detection/detection means for electrically detecting that the film is in a transport state is arranged so that it is located at a position where a part of the leader of the film ends. A film detection device according to claim 1 or 2 provided herein. Left The film detection device 0- according to claim 1, wherein both the film detection means and the film transport state detection means are arranged so as to detect perforations on the same side of the film.