JPH01152440A - Film rewinding device - Google Patents

Abstract

PURPOSE:To take up all the film in a container at the time of rewinding in case of a photographed film and to take up the film so that the leading edge of the film is left outside the container at the time of rewinding in case of the film which has been already photographed in the middle by providing a means for stopping the action of a rewinding means a specified time after a detecting means does not detect the film. CONSTITUTION:A means is provided, which stops the actions of the rewinding means FSS and FWS the specified time after the detecting means ARWS and MRWS do not detect the film in case of detecting the stretch of the film and storing that it is a 1st rewinding start signal. Therefore, rewinding is completed in a state where the film is all taken up in the film container when rewinding is started in a state where all the frames of the film have been already photographed and the film is stretched. And when winding by manual operation is started, rewinding is completed in a state where the leading edge of the film is left outside the film container. Thus, whether the film is new or not can be discriminates and the film can be easily loaded in a camera again in case of rewinding the film which has been photographed in the middle and reusing it thereafter.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to an electric rewinding device for camera film.

[Prior art]

There are both known cameras in which the entire film is wound into the film container and cameras in which the leading edge of the film is exposed outside the film container when electrical rewinding of the film is completed.

By the way, in the case of a film that has already been photographed and all frames of the film have been photographed, if the leading edge of the film is left sticking out of the film container, the film may be mistaken for new film and loaded into the camera.

Furthermore, there is a possibility that the film may be pulled out by mistake. Therefore, in the case of a film for which all frames have been photographed, it is preferable to roll the entire film into the film container.

On the other hand, before shooting all frames, in other words, during shooting, replace the film with another film, and after using this different film, load the film in the middle of shooting into the camera again, until the frames have not been exposed. When the film is wound in such a way that exposure is not performed and the film stage is rewinded in the middle of the film, it is desirable to complete the rewinding with the leading edge of the film protruding from the film winding surface.

Among conventional cameras, there is no known camera that can deal with both of the cases described above.

[Purpose of the invention]

In this invention, all the frames of film are contained in a film container.

If the film has already been taken out, the entire film is wound into the container when being rewound, but when the film is rewound in the middle of the film, it is possible to leave the leading edge of the film outside the container. The purpose of the present invention is to provide a film rewinding device.

[Structure of the invention]
.

The film rewinding device of the present invention includes means for outputting a first rewinding start signal when tension of the film is detected during film winding, means for outputting a second rewinding start signal by manual operation, and a first rewinding start signal. 51 or a second rewinding start signal, a rewinding means for rewinding the film, a means provided in the film transport path for detecting the presence or absence of the film, and a means for detecting the presence or absence of the film; A means for storing which rewind start signal outputs the rewind, and a means for rewinding the rewind immediately when the detection means no longer detects the film when the storage means memorizes that the rewind start signal is the second rewind start signal. means for stopping the operation of the rewinding means and stopping the operation of the rewinding means after a predetermined time has elapsed since the detection means no longer detects the film when the first rewinding start signal is used to remember what to do. It is characterized by:

With this configuration, when the film has been photographed for all frames and rewinding is started with the film stretched, rewinding is completed with the film fully wound into the film container.
When rewinding is started by manual operation, rewinding is completed with the leading edge of the film exposed outside the film container.

〔Example〕

□ FIG. 1 is a perspective view showing the appearance of a camera to which the present invention is applied. The camera uses a lens shutter. 1 is a release button, the first step of pressing down on this release button 1 closes the photometry switch, a preparation operation for exposure control is performed, and the second step of pressing down on release button 1 closes the release switch. exposure control operation is performed.

2 is a liquid crystal display section, and a specific example of the display is shown in FIG. 3 is a photographing mode setting button (hereinafter referred to as a mode button), and the photographing mode changes each time this mode button 3 is pressed. 4 is a film counter setting button. In this embodiment, since the film counter is an electric film counter, the contents of the film counter will be lost if the power supply battery is replaced. Therefore, when the battery is replaced, the number of frames to be photographed can be preset by operating the film counter button 4.

5 is a window for a finder, and 6 and 7 are windows for distance detection. 8 is a light emitting part of a flash, 9 is a light receiving part for automatic exposure control, and 10 is a photographing lens. Reference numeral 12 denotes a lens cover opening/closing member, and when it is moved to the right from the illustrated state, it covers the lens cover (not shown) or the photographing lens, making it impossible to perform exposure control operations. 1
Reference numeral 1 denotes a display unit that displays that the self-timer is in operation during self-timer photography. \ FIG. 2 is a specific example of the display unit 2 shown in FIG. 1.

15 is where the name of the camera is displayed. The company name may also be displayed in this part. This display section 15 is displayed only when the lens cover does not cover the photographing lens 10. 16.
18,20. 22. 24° and 26 are parts that display the shooting mode. rSTANDARDJ is the normal mode, and is based on the photometric value (if the exposure time is faster than the constant exposure time, it is constant light shooting; if the speed is slower than the constant exposure time, it is flash shooting. rsELFj is the self-timer mode. Yes, the release switch is closed for 10 seconds
When ec elapses, normal mode photography is performed.

rcLO3Ej indicates the close-up photography mode, the aperture is the minimum aperture, and the mode is where flash photography is performed. 1FILL F and J are F 1ll-in F 1ash modes, in which shutter (lens shutter) control is performed using ambient light, and flash emission is also performed using Flashmatic. rcONTIJ is in continuous shooting mode,
As long as the release switch is closed, constant light photography continues even at low speeds. In another embodiment, when the speed becomes low, flash photography is performed only when flash photography is possible, and the release lock is applied when flash photography is not possible. r
NONF is a mode in which flash photography is not performed (non-flash mode), and in this mode, steady light photography is performed even at low speeds. The characters indicating these modes are also displayed only when the lens cover does not cover the taking lens. Outer frame 17 of characters indicating each mode. [
Frames 3, 21, 23, 25, and 27 indicate which mode is selected. 17 for normal mode, 19 for self-timer mode, 21 for close-up mode, F
23 is displayed for 1ll-in F 1ash mode, 25 is displayed for continuous shooting mode, and 27 is displayed for non-flame non-yu mode. These modes are selected by closing mode button 3 as described above, and each time mode button 3 is closed, 5TANDARD +5ELF-+CLO
3E→FILL F −+C0NTl →NO
NF.

→5TANDARD→... The switching is performed in the following order. Also, when the exposure control operation in one mode is completed, rsT
Automatically returns to ANDARD DJ.

Reference numeral 30 is a segment for displaying the ISO sensitivity, and when the ISO sensitivity is read from the film container, the ISO sensitivity is displayed together with the display section 29.

On the other hand, if a film container without an ISO sensitivity signal member is installed in the camera, or if no film container is installed in the camera, 15O100 and the symbol "rFIX" 28 indicating that it is fixed are displayed. Ru. 3
Reference numeral 5 is a symbol indicating whether or not a film is attached, and this symbol lights up when a film is attached and the back cover is closed. In addition, the back cover can be opened with the film attached,
When the back cover is closed again with the film intact, this symbol 35 flashes to warn you. The displays 33 and 34 are lit alternately during film winding to indicate that the film is being wound, and the displays 31 and 32 are lit alternately while the film is being rewound to indicate that the film is being rewound. Show that you are there. Symbols 36 and 37 indicate the status of the case back; 36 lights up when it is closed, and 37 lights up when it opens.

Further, when rewinding is completed, 36 and 37 are lit alternately to remind the user to open the back cover and take out the film.

38 is a display section that displays the number of photographed frames. If no film is loaded in the camera, the display changes to "0", and while the film is being pre-advanced, the display changes from "0" to "-" to "-" to "1". Below, "2" → "3" → ・"IO" →
Changes from "11" to "38" to "39", and then "
Return to 1. Furthermore, when the battery is replaced with a film attached, "00" flashes, and when the film counter setting button 4 is operated, the preset number lights up. Also, if the internal resistance of the battery increases and the open-circuit voltage decreases, making it impossible to wind the film or boost the flash power supply within the specified time, the displayed number (number of frames) will blink and the battery will be drained. Encourage exchange.

FIG. 3 is a diagram showing the overall circuit configuration of a camera to which the present invention is applied. BA is a power supply battery, and power is directly supplied from this battery to the flash circuit FL and the motor control circuit MD via a power supply line 10E. Further, a series circuit of a diode D1 and a capacitor C3 is connected in parallel with the battery BA and the battery BA, and the connection point between the diode D and the capacitor C1 is a power supply line VD. From this power supply line VD, a micro-convenience store MC (hereinafter referred to as a microcomputer), an oscillator 08C1 display control circuit DS
, a film sensitivity reading circuit CA, and a delay circuit DL.
.

DL2, one-shot circuit os, os2. os3゜O
S, , inverter IN, ,IN2, exclusive OR circuit EO, ,EO2, AND circuit AN,.

Power is also supplied to AN2, the OR circuit OR, and the NOR circuit NO. Here, the capacitor C1 is a capacitor with a relatively large capacity, and the power supply battery BA is connected in a relatively short time.
When replacing the capacitor C3, power is supplied to the terminal VD. Also, when boosting the voltage for flash, the power supply battery B
This also prevents the microcomputer MC from becoming inoperable due to a decrease in the output of A.

Transistor BT is a transistor controlled by signals from terminals p and 7 of microcomputer MC, and when this transistor BT becomes conductive, the automatic exposure control circuit EC, autofocus section AC, and light emitting diode are connected via the power supply line VC. Power is supplied to L1 to L4.

Switch S. is a switch linked to the lens cover, and if the lens cover is open, it is switch S.

is OFF, and is ON when the lens cover is closed. This switch S. When the switch changes from ON to OFF or from OFF to ON, the delay circuit DL1 and the exclusive OR circuit EO output a high pulse and input it to the NOR circuit NO1.The switch BKS is linked to the back cover. The switch turns on when the back cover is opened and turns off when it is closed.This back cover switch BKS is turned on.
Even when changing from N to OFF or from OFF to ON, a pulse of "H4gh" is output by the delay circuit DL2 and the exclusive OR circuit EO2, and is input to the NOR circuit NO1. The switch MO3 is a switch linked to the mode button 3, and when this switch MO8 is closed, a 'High' pulse is output from the one-shot circuit O81.
Input to NOR circuit NO1.

MRWS is a switch that is closed when manually rewinding the film, and ARWS is a switch that is closed mechanically or by latch switching when the film is stretched during winding and the winding load becomes large. It's a switch. When either of the switches MRWS and ARWS is closed, a 'High' pulse is output from the one-shot circuit O82 and sent to the NOR circuit NOI. Sl is closed at the first step when the release button 1 is pressed down. When this switch S is closed, the output of the inverter IN is inverted to llowI#, and the signal from the inverter IN is input to the interrupt terminal it.F.
WS is a switch that is turned on during film feeding, and a specific example is shown in FIG.

Further, the switch LES is a switch that is turned ON when the operation of a photographing mechanism (for example, a mechanism for moving a photographic lens) starts, and is turned OFF when charging of the photographing mechanism is completed. When either of these two switches is closed, the output of the OR circuit OR1 is High"' and the winding operation continues. The switch FDSo is turned off when the film is wound around the spool (not shown). The FDSI is a switch installed near the film feed rail surface, and if the film is loaded, it becomes O'F 'F.Therefore, if the film is loaded at any position, When it is detected that there is a
The output of the AND circuit AN becomes 'Low'.The film is no longer detected at either position and -13-qp
i, both switches FDS, , FDS are turned on, and the output of the AND circuit AN becomes =High I+.

This causes the one-shot circuit O8 to output "'High".
If the back cover is open at this time, this pulse is output from the AND circuit ANo, and this pulse is input to the NOR circuit NO.Here, the switch FDSo provided at the spool position The film can be detected even when the back cover is opened, but the switch FDS is installed near the rail surface.

When the back cover is opened, the film is no longer held down, making it impossible to detect the film. Therefore, a film detection switch FDSo is provided at the spool position. On the other hand, the switch FDS near the rail surface is used during rewinding.

This is provided to detect that the leading end of the film is wound closer to the film container than the position , and to stop rewinding. If you stop rewinding when this switch FDS no longer detects the film and turns on, the film will not be completely rolled up into the container, that is, the leading edge of the film will remain out of the container by a predetermined length. A switch FDSI is provided at a certain position.

The SPS is a switch that is turned on and off according to the rotation of a driven sprocket that rotates in conjunction with film advance.

This switch SPS is a switch for detecting that there is an abnormality in film rewinding if the state does not change within a certain period of time during rewinding. This abnormality during rewinding is when the leading edge of the film is bent (curved) when using a hard film.
If this bent part comes to the driving sprocket near the final position of rewinding, the sprocket hole of the film and the teeth of the driving sprocket will no longer mesh and the film will no longer be fed. say. At this time, since the detection switch FDS near the rail surface is detecting the film, the rewinding drive continues, resulting in wasted energy consumption. Therefore, this switch is provided to prevent malfunction when such a special film is attached. Furthermore, it is also provided to detect whether or not the internal resistance of the power supply battery BA has increased and the open circuit voltage has decreased, making it impossible to feed a certain amount of film within a certain period of time.

The switch FSS is a switch for indicating the stop position of film winding, and a specific example is shown in FIG. 4 together with the switch FWS for detecting film advance. In FIG. 4, reference numeral 40 denotes a sliding member that rotates clockwise in conjunction with the winding of the film, and rotates once when the film is fed by one frame. Note that during rewinding, the sliding member 40 rotates counterclockwise. When winding of the film is completed, the sliding member 40 short-circuits the circular common pattern 43 and the island-shaped second pattern 42, and the switch FSS is in a closed state. When winding of the film starts, the sliding member 40 disconnects from the second pattern 42 and short-circuits the common pattern 43 and the substantially circular first pattern 41 which is cut across the gap 41d. The switch FWS is now in a closed state. Each pattern 4
1 to 43 are formed of printed conductors or the like. In this state, the winding of the film progresses, and the sliding member 40 moves to the first pattern 4.
When it deviates from 1 (that is, the switch FWS is turned OFF), the film feed motor is braked to stop the film feed. Here, the film is further wound up due to the inertia of the winding system from the time the brake is applied, but the amount of this winding is determined by the driving speed of the film advance motor at the time the brake is applied, that is, the speed of the battery that drives the motor. Changes depending on the output. Here, when the internal resistance of the battery is low and the open circuit voltage is sufficient (when the battery is new), the sliding member 40 moves in the second pattern 42 from the time the brake is applied until the winding actually stops. If the design is such that when the battery output drops, the sliding member 40 will move to the second pattern 42 before applying the brake and stopping film winding.
It will not move to the position. This becomes especially noticeable when the driving voltage range of the motor is widened. As a result, there is almost no space between the photographed pieces, and in extreme cases, the pieces overlap. Therefore, in this embodiment, when the brake is applied and a certain period of time has elapsed, the sliding member 40
It is determined whether the has moved to the position of the second pattern 42 (switch FSS is ON), and if it has not moved, the motor is started again and the sliding member 40 moves to the position of the second pattern □42. The motor is driven until the film is wound (until the switch FSS is turned on) to wind the film.

In FIG. 3, switch S2 is a release switch that is closed in the second step when the release button 1 is pressed down;
When this switch S2 is closed, the photographing operation is controlled by the microcomputer M.
C starts. The switch CO8 is a switch linked to the film counter setting button 4. When the film counter setting button 4 is pushed in, it turns ON, and a "'High'" pulse is output from the one-shot circuit ○S4, and the pulse is outputted via the inverter IN. It is sent to the interrupt terminal it2.

MO is a motor for transporting the film, and MD is a control circuit for this motor M○. This control circuit is a microcomputer MC
terminal p+o+ I) motor M according to the signal from I+
This terminal p, controls O. The signals from +p++ and the status of the motor MO are as shown in Table 1.

A specific example of the flash circuit FL is shown in FIG. In FIG. 5, the terminal p12 from the microcomputer MC is “L”.
ow”, the transistor BT3o becomes conductive, and the transistors BT33, BT3., and the transformer T become conductive.

The operation of the booster circuit consisting of
The output obtained by boosting the output of is charged to the main capacitor C1l. At this time, the terminal p+s of the microcomputer MC is
If it is "High", the transistor BT32.
BT, . become conductive, and resistor R5, Zener diode ZD1, transistor BT3. , a current flows through the series circuit of the resistor R8, and a voltage corresponding to the charging voltage of the main capacitor C0 is generated across the resistor R6. Comparator AC,. , AC,.

The output of the constant voltage source FCC and the voltage obtained by dividing the output of the constant voltage source FCC by resistors RIo and R1+ are applied to the inverting input terminal of , and the voltage from the resistor R8 is applied to the non-inverting input terminal. When the charging of the main capacitor C11 progresses and the output of the comparator AC,, reverses to "High'", it means that the main capacitor C11 has been charged to a level that allows light emission at the guaranteed guide number. When the microcomputer MC detects this, it displays a charging completion display and prevents the release lock from being applied (hereinafter referred to as charging completion 2 OK). Fully completed 2 OK
Even if the state of
Boosting is performed until the output of fl is inverted to "High". When the microcomputer MC detects that the output of the comparator AC,o has been inverted to "High'" via the terminal p14 (hereinafter referred to as completion 10), the microcomputer MC sets the terminal +x to "High" and sets the terminal 1 to "High". )+3 to “I L
o, I+ to stop boosting the voltage and stop charging detection. Then, since the charge detection circuit becomes inactive, the charge in the main capacitor C1 is only discharged by natural discharge, and even if left for a long time, the charge in the main capacitor CI+ remains at 20°C. ing.

When the completion 2 is OK, the microcomputer MC starts running 1- for a certain period of time (for example, 1 Qsec). If the charge does not reach 10 within this certain period of time, the battery is exhausted and the output is insufficient. In this case, boosting and charge detection are forcibly stopped, and the battery is fully charged. Warn you that it's running out. In addition, constant voltage source FCC, voltage dividing resistor RIO+
R11, comparators AC, o, and AC3° should also be driven by transistor Ti2 or a transistor provided in parallel with transistor BT, 2 so that they operate only when terminal pI3 is ``High'' to save power. is desirable.

Also, during exposure control, when a trigger signal TR ("High" pulse) is input from the automatic exposure control circuit EC, the Cyrisk SC becomes conductive, and the charge in the trigger capacitor C1 is discharged, causing the trigger transformer T to A trigger is applied to the xenon tube Xe.

This causes the xenon tube Xe to connect to the main capacitor C11.
It emits light by discharging the charged charge.

A specific example of the display control circuit DS shown in FIG. 3 is shown in FIG. This display control circuit DS includes light emitting diodes L, -L.
, and a liquid crystal display section LC are connected. Light emitting diode L is a light emitting diode provided in the self-timer display section 11, and L is a green light emitting diode that lights up or blinks during constant light photography. R3 and R4 are provided in the same package, and R4 is a green light emitting diode and R3 is a red light emitting diode.

R4 lights up or flashes when flash photography is performed, and R3 requires flash photography and takes two hours to complete.
Flashes when the status is not OK. This R3,R
4 are provided in the same vano cage, so that they illuminate the same flash mark. These light emitting diodes L2+L3. 'L' is displayed in the finder.

FIG. 7 is a diagram showing what can be seen in the finder.

Reference numeral 51 indicates a field frame, and 52 indicates a distance measurement frame, and the distance measurement frame and the photometry range of the light receiving section 9 for automatic exposure control almost match. 53 is a constant light photography display mark displayed by the green light emitting diode L2, and 54 is the green light emitting diode L4.
Alternatively, it is a mark for displaying flash photography displayed by the red light emitting diode L3.

Next, the display control circuit DS will be explained based on FIG. This display control circuit DS reads 4 bytes of data sent in series from the microcomputer MC, and based on the read data performs display using the light emitting diodes L, -L and liquid crystal. Display data in the microcontroller MC is in registers DPR8, DPR, , DPR1, DPR3.
, and this data is output from the serial output terminal SOU.

In this serial output operation by the microcomputer MC, the data set in the input/output register IOH is sequentially output from the terminal SOU one bit at a time starting from the lower bit in synchronization with the rising edge of the clock pulse from the terminal SCK. Furthermore, for serial output operation, data input to the serial input terminal SIN is input to the input/output register IOR in synchronization with the falling edge of the clock pulse output from the terminal SCK. Eight clock pulses are output from SCK in one serial input/output operation.

When terminal p+e becomes "'High", AND circuit AN,
.

becomes active, and the data from the serial output terminal SOU is output from the AND circuit AN,5. and terminal SC
In synchronization with the fall of the clock pulse from K, data from AND circuits AN and 5 are sequentially transferred to shift register SH.
It will be loaded into R. When the sending of 4 bytes of data from the microcomputer MC is completed, the terminal p+++ is connected to °'
When the terminal p and 8 fall to 'Low', the reference clock 5T is output from the circuit composed of the D flip-flops DFo, DF, and the AND circuit AN.
A pulse synchronized with CK is output and the shift register SHR
The data read into is latched into latch circuits LAo-LA.

Note that from the microcomputer MC, registers DPRo-DPR,
Since the latch circuit LAo is sent in the order of
The content of Ro, LA is the lower 4 bits of DPR, LA
, is the upper 4 bits of DPR, and LA3 is DPR, .
The contents of DPR3 are latched in LA and LA, respectively.

Next, Table 2 shows the relationship between the contents of registers DPR and -DPR3 and the display contents.

Here, for example, bit 5 of register DPR is used. 5.D
Bit 3 of PR is indicated by b23.

The lower 5 bits of register DP'R are set to ISO sensitivity, and this data is displayed in segment display section 3 in Figure 2.
It is sent to the segment driver SGC via segment decoders DE and o for numerically displaying the ISO sensitivity. Note that the upper three bits of this register DPRo are redundant bits.

The lower 4 digits and upper 4 digits of the register DPR are set to display contents of the lower digits and upper digits of the display section 38 of the film counter, respectively. And decoder DE+1+D
E+2 performs decoding as shown in Table 2, respectively. That is, "'OH" is blank (all segments are off), "IHL" is "1", "2H'" is 12"
, "31 (" is "3", "'4.H"" is "4", "-
s HI+ is "5", ""6H"' is "6", "7H"
``7'', ``'8H'' is ``8'', ``9H゛°'' is ``9'',
"AH'" becomes "O", and "BH'" becomes "-".

When bit b20 of register DPR2 is °゛O''°, the output of NAND circuit NA,3 in Fig. 6 remains "'High", and decoders DE, ..., DE, output segment data. The display section 38 for the film counter remains lit.On the other hand, when the battery is replaced with the film still attached and the film counter is not preset, or when the film is wound or the pressure is not increased within a certain period of time. If this is not done and a warning of power battery consumption is issued, the value becomes "1" and the NAND circuit N'
A clock pulse obtained by inverting the output of the frequency divider DIV is output from A and 3. And the decoders DE, ,DE,
2, when this clock pulse is "Low", the film counter display section 38 blinks to issue a warning in order to output data that turns off the film counter display section 38.Bit b2+ indicates that the lens cover is not closed. If the value is "0", the camera name display section 15 and the mode display section 16. 18. 20. 22. 24. 26
goes out. On the other hand, if the lens cover is open, the angle is 1", and the display section 15. 16. 18. 20.
22, 24, and 26 are lit to indicate that the lens cover is open and exposure control operation is possible. This signal also controls the decoder DE, . If it is "1", a signal indicating the mode selection is output from the decoder DE + 4, and if "'O゛°, the signal indicating the mode selection is output from the decoder DE, 4. No signal is output, and all of the outer frame display sections 17 to 27 are turned off.

Bits b2111 b23+ b! of register DPR,
2 is input to the decoder DE and 3, and the output of the decoder DE13 is as shown in Table 3.

In addition, bit 1) shown in Table 3) 211+ b13+ b
The microcomputer MC cannot create any combinations other than the zt data combinations. When the data is 111', the film has been rewound, and in this case, terminals d12+d13 become "High".First, when d+3 becomes "high", the output of the OR circuit OR23 becomes "High". d+□ becomes “High” and the film display section 35 lights up.
By becoming “gh”, AND circuit A N 25. A N
Lior circuit OR21+OR2 with t e in active state
From 2 onwards, it alternately goes “'Hi” in synchronization with the output of the frequency divider DIV.
gh" signal is output, so the back cover display parts 36 and 37 light up alternately to remind you to open the back cover and take out the film. Bits b26, b23, and b7. are "101"'
Then, terminals d+s and dll become High'". In this case, the case back is closed and a film is attached, and the outputs of OR circuits 0R20 and 0R93 are "High".
Symbol 35 on the film display section and back cover closed display section 3
6 lights up. When the data is "001'", the terminal dll of the decoder DE,3 becomes "'High". This is the case when the back cover is closed without a film being attached, and only the back cover closed display section 36 is displayed.

When the back cover of the camera is opened, data "010" is sent regardless of whether film loading is detected or not. As a result, the terminal dlo of the decoder DEI3 becomes 'High', and only the back cover open indicator 37 lights up.The mounting of a film is detected with the back cover open, and the film remains in that state without being taken out. When the back cover is closed, data of ``100'' is sent from the microcomputer MC. In this case, the decoder DE,
3's terminals d14 and dll become ``High.'' When the terminal dll becomes ``High,'' the output of the OR circuit OR2 becomes ``High,'' and the back cover closed display section 36 lights up.Furthermore, d14 becomes 'High', the clock pulse from the frequency divider DIV is passed through the AND circuits AN, 7,
Output via OR circuit OR, 3, film display section 35
flashes to warn you.

During the winding operation, the bit b24 is "1", and the AND circuits AN, 3.AN, and 4 are in the active state.

Therefore, in synchronization with the clock pulse from the frequency divider DIV, the AND circuit AN23. The output of ANt4 is alternately “” High.
h". As a result, the winding display sections 33 and 34 light up alternately to indicate that winding is in progress. When the winding is not in progress, the bit b24 is at 0°, and the winding display sections 33 and 34 are at 0°. There is a beep when the light is off or during rewinding operation.
When pi becomes 1, the AND circuits AN, . . . , AN20 become active, so that the outputs of the AND circuits AN, . As a result, the rewind display section 3
1.32 lights up alternately to indicate that rewinding is in progress. When the amount of rewinding is outside the middle, the bit bz5 is 0°00 and the rewinding display portions 31 and 32 are lit white.

The bit b27 becomes ``1'' when it is determined that the back cover is closed and a film container equipped with a signal member indicating the ISO sensitivity is attached.As a result,
The display section 29 lights up to indicate that the ISO sensitivity has been read from the film container.

On the other hand, when the back cover is opened, when the back cover is closed but no film container is mounted, or when a film container without a signal member indicating ISO sensitivity is mounted, bit b2 ? becomes "0"' and the inverter IN. The output becomes "High". This causes the display section 28 to light up, indicating that the ISO sensitivity is fixed.

Bit b of register DPR3! +2+ 1)ll+ b
aa is “001” depending on the shooting mode as shown in Table 2.
” to “110”.

The decoder DE,4 outputs the signals shown in Table 4 in response to this data.

As a result, the outer frames 17 to 2 of the characters according to the shooting mode are
7 will light up to indicate the exposure control mode.

Bit b33 is "1" while the self-timer is counting time (105ec) in the self-timer photography mode. Therefore, during this time, the NAND circuit NA.

Then, a clock pulse obtained by inverting the output of the frequency divider DIV is output, and the light emitting diode L1 blinks.

b33 except when the self-timer is counting time.
o” and the output of NAND circuit NA, 2 is High”
The light remains as it is, and the light emitting diode L goes out.

Bit b35. b34 is "01" when normal photography can be performed in constant light photography, "10pa" when the shutter speed reaches the low speed limit in constant light photography, and "00°" in flash photography. Therefore, when b34 is "1", the output of NOR circuit No. becomes "low" and the green light emitting diode L lights up.On the other hand, b3,
When becomes 1'', a clock pulse obtained by inverting the clock pulse from the frequency divider DIV outputted from the AND circuit AN, , is outputted from the NOR circuit N082, and the green light emitting diode L2 blinks.

Bit b37. As shown in Table 2, b36 is set to "'11" when normal flash photography can be performed, and 01° when flash photography is possible and the shooting distance is too far.
, "10°" when the flash is not fully 2 OK in flash photography mode, "oo" when in constant light photography mode
The data is as follows. Then, the decoder DE,6 outputs the signals shown in Table 5 according to this data.

Therefore, when the terminal d4+ becomes 'high', the NOR circuit N
When the output of O1 becomes "Low" and the green light emitting diode L4 lights up, and da2 becomes "'High", the clock pulse from the frequency divider DIV output from the AND circuit AN, , is transferred to the NOR circuit N. The signal is reversed at ○11, and the green light emitting diode L4 flashes in response to this to issue a warning.

On the other hand, when the terminal (Lo) becomes “High”, the NAND circuit N
A clock pulse, which is an inversion of the clock pulse from the frequency divider DIV, is output from A, , and a red light emitting diode L is output.
3 flashes to warn you that the flash is not charged.

In Figure 6, COO outputs a common signal of liquid crystal C according to the signal from frequency divider DIV, and SGC outputs a segment signal of liquid crystal LC according to the signal from frequency divider DIV and a human input signal. This is a circuit that does this.

In Fig. 3, O20 is an oscillator for generating clock pulses, and the output clock of this oscillator ○SC is
It is input to each circuit MC, DS as a reference clock 5TCK of O and display control circuit DS. Autofocus section for distance detection and lens control (hereinafter referred to as AF circuit)
AC is “High” from terminal p211 of microcomputer MC.
When a pulse is input, the distance measurement operation is started, the distance to the subject is detected and stored, and the detected and stored distance data is output to the exposure control circuit EC.Then, the release magnet RM When electrical conduction occurs, the lens moving mechanism (not shown) starts moving (at this time, the switch LE
S is closed). Then, as the lens moves, a pulse is output from the lens pulse output circuit LP, and the AF circuit AC compares the count value of this pulse with the stored distance data. When the two match, the magnet 1-AM having a permanent magnet as its core is made conductive in a pulsed manner to lock the movement of the lens and stop the lens at a position corresponding to the detected distance.

A specific example of the film sensitivity reading circuit CA and the exposure control circuit EC for reading the ISO sensitivity from the film container is shown in FIG. 8, and this circuit will be explained below based on FIG. 8. The switch group CAS surrounded by a broken line is a contact group that reads data from the film container.
The combination of N and OFF is determined. The counter COI is released from the reset state when the terminal pIe of the microcomputer MC becomes "High" and counts the rising edge of the clock pulse from the serial clock output terminal SCK.

The decoder DE then operates the AND circuits ANo, -AN4 . are sequentially activated and a signal indicating the state of the switch is sequentially output. Signals indicating the ISO sensitivity sequentially outputted from the AND circuits ANo, -AN, . The part described above is the ISO sensitivity reading circuit CA, and this part is supplied with power from the power supply line VD. The remaining part in FIG. 8 is the exposure control circuit EC, which is supplied with power from the power supply line Vc.

ISO sensitivity data from switch group CAS is I)-A
The ISO sensitivity code is input to the converter DA, and at least one of the lower two bits is "1".
When the SO sensitivity is read, the output of the OR circuit is “Hi”
gh'" and becomes "Low" when the Is○ sensitivity is not read.The D-A converter DA is an OR circuit O.
When the output of R, is "High", it outputs an analog signal corresponding to the 5-bit ISO sensitivity data input from CAS, and when the output of OR circuit OR, is "Low", it corresponds to the fixed ISO sensitivity ISO +00. Outputs the analog signal.

Furthermore, switch group CAS and OR circuit OR, and further AF
Distance data from circuit AC is also input to decoder DEF for Flashmatic. Since the Flashmatic in this embodiment has a fixed amount of flash light emission, the flash fires when the aperture aperture becomes appropriate depending on the distance and ISO sensitivity.

Since the shutter of the camera used in this embodiment is a lens shutter, the time from the start of opening of the shutter corresponds to the aperture of the diaphragm, so the decoder DEF
outputs time data determined by the distance between the camera and the subject and the ISO sensitivity. Note that when the output of the OR circuit ○R4 is "Low'", time data corresponding to IS○100 and distance are output. And this time data is D
-A converter DA2 converts it into an analog signal. In addition,
When the combination of ISO sensitivity and shooting distance results in insufficient light output even if the flash is fired when the aperture is at its maximum aperture, a "'High" signal is sent from the decoder DEF to the input terminals p and 4 of the microcomputer MC. A signal is sent, and a warning (blinking of light emitting diode L4) regarding the insufficient amount of light emission is issued.

An analog signal indicating the ISO sensitivity from the DA converter DA is input to the non-inverting input terminal of the photometric circuit operational amplifier OA. A light receiving element PD is connected between both input terminals of the operational amplifier OA, and the output current of the light receiving element PD is logarithmically compressed into a voltage by the diode D2.

The output of is B vl S v = E v. The power supply line Vc becomes powered, the photometry circuit becomes stable, and A
When enough time has elapsed for F circuit AC to memorize the distance data, microcomputer MC sets ftg p + 9 to “Lo”.
w”. This causes the analog switch AS to
It becomes an FF, and the output of the photometry circuit is stored in the capacitor C4. The constant voltage source EH outputs a voltage corresponding to the Ev value EVH that provides the minimum aperture opening with the shortest exposure time, and the constant voltage source EH
L outputs a voltage corresponding to the Ev value EvL, which is the limit exposure time at which camera shake occurs at the maximum aperture aperture. Therefore,
Comparator AC,.

AC2, AND circuit AN5. output, analog switch AS, , AS3. Table 6 shows the relationship between AS and control Ev value.
become that way.

Nao, the output of the comparator AC2 is input to the terminal p23 of the microcomputer MO, and when it is determined that E v < E vl and this terminal is Low''', the normal shooting mode and self-timer shooting are activated. When in mode, it switches from constant light photography to flash photography.

According to the relationships shown in Table 6, analog switch AS2.
AS3. ' The Ev value signal output from either AS4 is input to the base of the logarithmic expansion transistor BT4. Further, an analog signal from the DA converter DA for creating the flash emission timing is input to the base of the transistor BT. When the microcomputer MC determines that the release switch S is closed and it is possible to shift to exposure control operation, the microcomputer MC connects the terminal p. ni”High
" pulse is output to make the transistor BT conductive for a certain period of time, thereby making the release magnet RM conductive and starting the movement of the lens and the exposure control operation. Then, when the shutter opening operation starts, the count switch O8 is opened. The transistors BT, , BT, become non-conductive.As a result, the collector current of the transistor BT4°BT causes the capacitors C, , C to become non-conductive.

is being charged. Then, when the charging voltage of the capacitor C5 reaches the output voltage of the constant voltage source EEC, the output of the comparator AC3 is inverted to "Low"', and the transistor B
When T becomes non-conductive, the magnet EM becomes non-conductive and the shutter closes. During flash photography, the microcomputer MC sets the terminal 1)21 to "'High"°, and puts the AND circuit AN into an active state. Then, when the time elapses until the flash reaches the aperture aperture for proper exposure, the output of the comparator AC5 becomes "High".
”, the output of the OR circuit ○R6 becomes High', a pulse of "High"° is output from the one-shot circuit O88, and this pulse is sent to the flash circuit FL via the AND circuit AN, . The flash fires.

Note that when the shutter speed is high and the shutter close operation starts before reaching the appropriate aperture aperture due to flashmatic, that is, when the shutter speed is high, the output of AC3 is inverted before the comparator ACs. In this case, the output of AC, becomes "Low" and the output of inverter IN, becomes High.Then, after the delay time of delay circuit DL6 for correcting the delay of the shutter mechanism, OR circuit OR , becomes "High'°, a pulse is output from the one-shot circuit O86, and a flash is emitted.

When in close-up shooting mode, the microcomputer MC is connected to the terminal '29.
Set to “High”. This results in transistor B
Ta becomes conductive, and the extension transistor BT becomes inactive. Further, the transistor BT7 becomes conductive, and the shutter closes after a time determined by the capacitor C5 and the resistor R6. This time corresponds to the time at which the aperture aperture becomes the smallest at the highest shutter speed. In this case, the terminal p, + is “
"High", and the flash is always emitted when the shirt shirt closing operation starts.

Therefore, in this shooting mode, the aperture is narrowed down as much as possible to deepen the depth of focus, and the underexposure caused by constant light alone is corrected by firing a flash. Note that even if the close-up shooting mode is selected, a subject that is not close to the camera may be photographed, but in such a case, there is a high probability that the camera will be underexposed.

Therefore, terminal 1) 22, transistor BT7. B.T.
When the resistor R8 is omitted and the close-up shooting mode is selected, the terminals p and 1 are set to "High" and the F 1ll-in
Control similar to the F1ash shooting mode may be performed. In this way, the shutter is controlled by ambient light, so there is no underexposure, and when photographing a close subject, the shooting distance obtained by the AF circuit AC is short, so the flash fires with a small aperture. The depth of focus also increases.

When the closing operation of the shutter starts and sufficient time has elapsed for the closing operation to be completely completed, the output of the delay circuit DL7 becomes 'High', indicating that the shutter is closed at the terminal Ihs of the microcomputer MC. Then, the microcomputer MC performs charging of the exposure control mechanism and lens moving mechanism and film winding operation.

Next, the microcomputer MC shown in FIG. 3 will be explained.

This microcomputer MC has interrupt terminals +to+it, +t
, and a reset terminal RES, and the priority order is RES, ita, iL, and itt.

Furthermore, a timer is provided internally to count an internal clock, and when the count value of the timer reaches a preset value, a timer interrupt is activated if the timer interrupt operation is enabled at this point. When each interrupt occurs, the microcomputer MC
goes from a power-saving operation stop state to an operation state and performs an operation from the address of the ROM (inside the microcomputer) corresponding to each interrupt.

While an operation is being performed using an interrupt signal, interrupts are not enabled and the next interrupt is not accepted, and the interrupt signal input during this time is used for interrupts inside the microcontroller. All you have to do is set the flip-flops. Then, when the microcomputer MC becomes interrupt-enabled, it performs an operation corresponding to this interrupt in response to a signal from the set interrupt flip-flop. Note that when starting the operation, the interrupt flip-flop is reset. Further, timer interrupts are accepted only when timer interrupts are enabled.

9 to 14 are flowcharts showing the operation of the microcomputer MC of FIG. 3. The operation of the embodiment of the present invention will be described below based on this flowchart. First, we will explain what happens when the back cover of the camera is closed. When the back cover is closed, the switch BKS is opened, and the interrupt terminal l is output via the exclusive OR circuit EO7 and the NOR circuit NO1.
An interrupt signal is input to to. Then, the microcomputer MC performs the operations starting from step #1 in FIG. Step #
In step 1, the flags CHF and 5TF (described later) are reset, and in case an interrupt occurs during the operation of the film advance motor MO, a "'High'" pulse is output to the terminals p+o+ and p++ to control the motor MO. Stop rotation and connect terminal p
By setting +z+ p+□ and p19 to "'High'", voltage boosting is stopped, power supply to the power supply line Vc is stopped, and AE lock is released. And P131 pto+ p
21 is set to "Low'" to stop detecting the charging state of the main capacitor C1l, transition to a flash disable state, and release terminal p. Perform glue setting. The above is a preparatory operation for canceling the operation being performed at that time when an interrupt signal is input to the terminal ito for some reason.

When the second preparation operation is completed, it is determined in step #5 whether the rewind switches ARWS and MRWS are closed. In this case, these switches are open, so the process moves to step #90 in FIG. 10. In step #90, it is determined whether the back cover is open or not. In this case, since the back cover is closed, the process moves to step #92, and the flag RBF is set to "0".
Determine whether °゛. The flag RBF is "1"(#118) when the back cover is closed, and O'" (
#93), and in step #92 “°
O", the camera back has been open until then, and at this point it means that the camera camera back is closed, and the process moves to step #118. It is determined in step #90 that the
If it is determined in step #19 that RBF is "°1", then the terminal ito is not interrupted by the closing of the back cover, so the process moves to step #190 in Figure 11. terminal it.

Look for other causes of interrupts.

In step #118, the flag RBF is set to "1" and the process moves to step #121. In step #121, it is determined whether or not a film is loaded based on the signals of switches SDF and 5DF1. If it is loaded, the process moves to step #122, and if not, the process moves to step #127. In step #127 1) 23+
t) Set “”01°” to 22 and further bt?~b
"0001" is set for t+. Therefore, the process moves to step #129 in which the camera back close display 36, the winding display 33, 34, and the fixed ISO sensitivity display 28 are displayed. On the other hand, in step #122, it is determined whether the flag FEF is "1". This flag becomes 1'' when the camera back is opened with the film still attached (
#95) It is a flag. And this flag FEF is '
1'', bit b23+b22 is “00” b27
The data of °'0101'' is set in ~b24, and the back cover closed display 36, the film loading display 35 flash, the winding display 33, 34, and the fixed RSO sensitivity display 28 are displayed.
2ζA is set and the process moves to step #129.

When it is determined in step #122 that the flag FEF is "0", steps #125 and 126 enable the back cover close display 36, film loading display 35, and fixed ISO sensitivity display 28. Then, proceed to step #129.

In step #129, bit bsz+ 1l13++
Set data of ° "001'" in b30 to set the normal shooting mode, and furthermore, set the normal shooting mode display section 17 to be displayed, and set b3? ~b33 has “ooooo”
The data is set so that the light emitting diodes L and -L4 do not light up. Then, in step #132, the flag BAF is set to 0'' and the process moves to step #133. Here, the flag BAF becomes '1'' when the power battery BA is replaced with the film attached (#432)
It's a flag. This is provided to display a warning on the film counter display section 38 when the memory of the count value for the film counter runs out. Therefore, when the back cover is closed from the open state, it is assumed that the film has been replaced, and there is no need to issue a warning, so the flag BAF is set to 0''.Step #133 transfers the display data to the display control circuit DS. This is a subroutine for transferring the data to the subroutine, and a specific example is shown as the operation starting from step #75 in FIG.

In the display data transfer subroutine of FIG. 9, first, in step #75, the terminal p+e is set to "'High'" so that the display control circuit DS is in a state where data can be inputted, and the contents of the register DPRo are set in the input/output register IOR. Then, a serial input/output operation is performed to output this data in series to the display control circuit DS. Register DPR in the same manner
,,DPR,,Send the contents of DPR3 in series to the display control circuit DS, and in step #84, connect terminal 1) 1G to ""
“Low” and returns to the return address.

When the display data transfer subroutine ends in step #133, the process moves to the winding subroutine in #134.

This winding subroutine is shown from step #165. In step #165, flag WF is set to “
Set 1pa. This flag is set to 1 during film winding.
This is a flag that will be used. Then, set the interrupt timer to 2s.
Preset the ec data and enable timer interrupts. Next, in step #168, set the terminal plo to 'High'.
h", plI is set to ""Low" and the film winding by the motor MO is started. Then, in step #169, the process waits for the film advance switch FWS to be turned on. During this time, the film is stretched and switch A is
RWS closes or manually rewind switch MRW
It is determined in step #170 whether S is closed or not. Note that the switch FWS is set to O after the shooting operation.
Even if it is FF, the switch LES linked to the photographing mechanism is ON, so the output of the OR circuit OR is "High"
”, the process immediately moves to step #171. In step #171, the switch FWS is then turned OFF.
wait until it becomes At this time, use the rewind switch ARWS.

Repeatedly determine whether MRWS is turned on or not#
This is done in 172 steps.

When it is determined in step #171 that the switch FWS is open, the terminal p+ is opened in step #173. , p
Set ll to "High" and apply a brake to the film advance motor MO. Then, in step #174, timer interrupts are disabled and the process waits for a certain period of time in step #175. This fixed time is a sufficient time (for example, 50m) to brake the motor MO and completely stop the film winding.
5ec), and when this time elapses, the process moves to step #176. In addition, the switch L that is linked to the shooting mechanism
The ES is always turned off before the film advance switch FWS is turned off. In step #I76, it is determined whether the switch FSS indicating the winding stop position is turned on, and if this switch FSS is turned on, the terminal p+o+ plI is turned on in step #183.
Turn off the motor by setting it to "T-ow" and turn #184
In step , the flag WF is set to '0'' and the process returns to the return address.

On the other hand, if the switch FSS is set to O or FF in step #176 because the power supply battery BA is exhausted, etc., the process moves to step #177 and the interrupt timer is preset to 1/4 sec. Enable the timer interrupt, set the terminal pro to "High" and plI to "Low" to cause the motor MO to rotate forward again.Then, wait for the winding stop position switch FSS to turn ON at step #180. Also rewind switch ARWS, MRWS
The determination is made in step #185. #18
When it is determined in step #0 that the switch FSS is turned on, timer interrupts are disabled in step #181.
In step #182, brake the motor MO for 50m5ec, then turn off the motor MO to stop the film advance motor MO (stop film winding), set the flag WF to 'O°' and return to the return address. Return to

Rewind switch ARWS during film winding.

Step #170° #17 indicates that MRWS has been closed.
2. #186 when judged by any of #185
At step #182, winding is stopped. Then, the timer interrupt is disabled and the process moves to step #6 in FIG. 9, where the rewind routine is performed.

The power supply battery BA is exhausted and the switch FW is turned off within 2 seconds.
If FSS is not turned OFF or switch FSS is not turned ON within 1/4 see, a timer interrupt is generated and the operation starts from step #245 in FIG. 11. In #245, it is determined whether the WF indicating that winding is in progress is °"1", and in this case, the flag WF is "l'", so #2
46, the film feed motor MO is stopped to stop winding. Then, bit b2o is set to 1"' to make the film counter display section 36 blink, and
4 to "0"' and turn off the winding display 33 and 34,
Set b32 to b30 to "001" to set the normal shooting mode, and set b□ to "0" to display the display section 15. regardless of whether the lens cover is opened or closed. 16. 17. 18.・、2
6.27 is turned off, the display data is transferred to the display control circuit DS, and the microcomputer MC stops operating without accepting any interrupt signals.

Therefore, in this case, the camera will not operate unless the power supply battery BA is replaced, and only a warning will be issued that the power supply battery BA has been exhausted and the camera can no longer operate.

When the film winding subroutine #134 described above is performed normally, "1°" is added to the contents of the film counter register FCR.This register FCR is set to "OOH" when the camera back is opened. It has been reset (#97). Then, the process moves to the counter display subroutine of #136. This counter display subroutine is shown by the operations starting from #49 in FIG.

Table 7 shows flags BRW, BAF, registers FCR, DP.
R, shows the relationship of the display.

In step #49, FCR calculation (#25 (FCR
)-1-(FCR)) to determine whether the hollow BRW is 1°". This occurs when the amount of unwinding is greater than the amount of winding after closing the back cover. Then, when the borrow BRW is 1'', the register FCR is set to ``00)1'' in order to set the counter display to 0'', the hollow BRW is set to 0'', and the process moves to #52. #5
In step 2, it is determined whether the flag BAF is “1” and
If "011", go to step #55.This flag BAF indicates that the power battery BA is replaced with the film attached and the back cover closed, and the counter is preset. This is a flag that becomes ``1 pa'' when it is not. If this flag BAF is "1'", the display register DPR is set to "A" to display "OO".
AH''' is set, b20 is set to 1° to cause the counter to blink, and the process returns to the return address.

If flag BAF is “O′° in step #52, #
In step 55, it is determined whether the contents of the FCR are "OOH". If “OOH”, register DPR, “
OA H" so that "0°" is displayed on the counter 36, and in step #71 the counter display section 3
Set b2[1 to "0°'" so that 6 lights up and return to the return address. If it is determined in step #55 that FCR- is not "OOH", then check whether FCR- is "'OIH". It is determined in step #57. And please “OIH”
If so, the data to perform the display “-” during preliminary feeding “BOH”
" is set in register I)PR, and returns to the return address via step #71.

If it is determined in step #57 that FOR- is not “OIH”, FCR-“02H” is determined in step #59.
Determine whether °゛. If it is "02H'", the display during preliminary feeding "data to be processed" OB H should be set in the register DPR (step #60), #71
The process returns to the return address through the following steps. If FOR≠“02H” in step #59, the process moves to step #61. In step #61, the contents of register FOR are “
2A, H”.
”, as shown in Table 7, the film counter display limit “39’ has been exceeded, so the limit value “39” has been set.
2914" is set in the register FOR and moves to step #63. On the other hand, if the contents of registers F, CR are not "2AH" in step #61, step #63 is executed. Move directly to #63
In step , the data obtained by subtracting the preliminary feed count value "2H'" from the contents of register FCR is stored in register FO.
R, and perform the following calculations for display.

This operation calculates how many times the contents of FOR, are greater than "AH", and the register FCR, is filled with decimal data "'O-"1'", "'2". ”.

'3°° is set, one of the data from O° to '9' is set in FCR, and the process moves to step #67. In step #67, the lower 4 bits of register FOR are set. In order to display 0°゛ when the content is OH', set "AH" in step #68, and
In step 7, the content of the lower 4 bits of FCR is “”O.
If it is not "H", leave it as is and proceed to step #69. In step #69, the lower 4 of register FCR,
bit data to the upper 4 bits of register DPR,
The data of the lower 4 bits of FCR, is set to the lower 4 bits of register DPR. And register FCR.

The lower 4 bits of the address are set to "'OH'" and set to "0" so that the counter display 38 lights up in step #71, and the process returns to the return address.

The operation when closing the back cover will be explained again based on the flowchart of FIG. 1O. When the counter display subroutine in #136 is completed, the display data transfer subroutine in #137 is performed, and in step #138, it is determined whether or not the back cover is opened during preliminary feeding. Then, when it is determined that the camera back has been opened, #1
After returning to step #93 and performing operations such as stopping the film feed motor MO, the operation for opening the back cover from #93 is performed. If it is determined in step #138 that the camera back is not opened, the process moves to step #139, where it is determined whether the contents of the register FCR are "3H" and the contents of the register FCR are "3H". If it is not #1
Return to step 34 and perform the next preliminary feed. #139
In step #140, when the content of FOR becomes "3H" and it is determined that preliminary feeding has been completed, b24 is closed as "O" in order to turn off the film winding indicators 33 and 34. Wait for a certain amount of time. At this point, data on the film container is read in the next subroutine #142, but the film has already been wound up to this point. Therefore, immediately after winding is completed, the film container is in motion and there is a possibility that the contact between the data detection contact and the data section on the film container is not stable, and erroneous data may be read. Therefore, in step #141, the process waits until the contact between the data section on the film container and the detection contact becomes stable.

When a certain period of time has elapsed in step #141, the process moves to #142, a subroutine for reading ISO data. This subroutine is shown as a flow starting from step #150. At #150, the terminal PIE is set to "High" to enable the film sensitivity reading circuit CA to output data. Then, in step #151, a serial input/output operation is performed to read the ISO data from the film container, and the read data is set in the register SVR. and,#
At least one of the lower two bits of the IS and O data read in steps #153 and #154 is “1”.
If at least one is “1”, the ISO
This is a case where a film container provided with a data signal member is attached, and the process moves to step #155. Then, in step #155, b2? is set to "1°", the read ISO data is set in the register DPRo, and the return address is returned.On the other hand, if it is determined in step #153 and #154 that neither of the lower two bits is "1", , corresponds to the case where a film container without a signal member of Is○ data is installed or a film container is not installed,
In this case, the process moves to step #157. In step #157, the b2? is “O°゛”, and I
Data corresponding to s○100 is set in register SVR, this data is further set in register DPRo, and the process returns to the return address.

ISO data reading subroutine #14 explained above
2 is completed, the display data transfer subroutine of #143 is performed, and the terminal itO+ +t is transferred.

#2 in Figure 11.
The process moves to step 15 to boost the flash voltage. In step #215, terminal PI2 is set to “Low”
In step #216, the terminal P13 is set to "High" to detect the state of charge of the main capacitor of the flash. and,#
In step 217, an interrupt operation by an interrupt signal to the terminal iLI is enabled, and the process moves to step #218. This step #217 is a step that is necessary when the lens cover opening operation is performed. In step #218, the flag CHF is set to "1" to indicate that the flash voltage is being boosted, and in step #219, the main capacitor C is set to "1".
Wait until the charge level of I1 is charged to a level that can guarantee the amount of light emission and becomes fully charged 2 OK. Then, when the full charge reaches 20, the interrupt timer is set to 10 in step #220.
sec data, enable timer interrupt, #
The process moves to step 222.

In step #222, it is determined whether the main capacitor C11 has been charged to a level that allows the state of fully charged 2 OK to be maintained even if the main capacitor C11 is left unused for a long period of time, and has reached the fully charged state of 10. Then, if it becomes fully completed 2 OK and becomes fully completed 10 by the time 10 seconds have passed, #22
Step 3 stops boosting the voltage, stops detecting the state of charge in step #224, sets flag CHF to "0'',
The interrupt operation by the timer is prohibited, and the microcomputer MC stops its operation.

When the state becomes fully charged 20 and the fully charged state does not reach 10 even after 10 sec has elapsed, a timer interrupt is generated when 10 seconds have elapsed, and the operation starts from step #245. In this case, the flag CHF is “1”, so #24
After 5,255 steps, C at step #265
It is determined that HF is "1", and the process moves to step #266. The boosting operation is stopped in step #266, and the charging state detection operation is stopped in step #267.

Then, the flag CHF is set to "0°", and in step #269, b2
Let 0 be "1". Next, transfer the display data and connect it to the terminal it.
o, it, can be operated by an interrupt signal to the first
Proceed to step #359 in Figure 2. And #35
In step 9, it is determined whether the photometric switch S is closed, waits for Sl to become OFF, and then #
361 is turned off, and when the operation of this subroutine is completed, the microcomputer M
C stops operating. Note that the subroutine #361 is shown in the flow from #365. In the step #365, the power supply transistor BT is turned off by setting the terminal 1) +7 to "'H4gh", and in the step #366, the AE lock is released by setting the terminal 1) +s to "'High", and in b37 to b34. Set the data 'o o o o' so that the light emitting diodes L2 to L4 are turned off, transfer the display data in step #368, and set the data to '1°' in the self-timer shooting mode. The flag STF is set to "0" and the process returns to the return address. Note that the above step #359. The operation in step #361 is not necessary when the camera back is closed, but the operation from step #266 is performed when the voltage is increased when the photometry switch S is closed. The above operations are performed because of this.

The above is the operation when the camera back is closed. Next, the operation when the release button 1 is operated and the photometry switch S1 is closed will be described. When the release button 1 is pressed to the first step and the photometry switch S1 is closed, the output of the inverter IN shown in Fig. 3 falls to 'Low', and the microcomputer MC receives this falling signal from the terminal it1. In response to this, the interrupt operation is performed.

Note that if the microcomputer MC is not able to accept interrupts from it+ while it is performing some operations,
During or after the operation, when the interrupt operation by it becomes possible, the operation is performed by closing the photometric switch. Further, when the microcomputer MC is in a state in which operation is possible in response to an interrupt signal from the terminal it1 and the operation is stopped, the operation is immediately started by closing the photometry switch SI. Note that if the power supply battery BA is exhausted and the film is not wound within the specified time, and if the lens cover
When the photometric switch S is closed, the microcomputer MC does not operate even if the photometric switch S is closed.

When the photometry switch SI is closed, the microcomputer MC
Perform the operations from step #295 in the figure. #295
Step #296 starts detecting the state of charge (this may not be done), and step #296 stops boosting (
#29
Move to step 7. Then, in the step #297, the terminal 1)+7 is set to "Low" to make the power supply transistor BT conductive, and then in the step #298, the terminal 1)
Output a “High” pulse to 2B and activate the AF circuit AC.
Starts the distance detection operation. Then, in step #299, the process waits for the time necessary for the distance detection and exposure control photometry circuit to stabilize, and then moves to step #300.
+e is set to °“Low”°, the photometry output is memorized, and AE lock is performed.

In step #301, check whether it is continuous shooting mode or not, #3
In 02, it is determined whether it is a non-flash shooting mode or not.
If it is any of the shooting modes, the process moves to step #320. Since no flash is emitted in any of these modes, the process moves to step #320. #
In step 320, the exposure time based on the photometric value becomes the exposure time at which camera shake occurs, and terminal 1) 23 is set to "L".
If the exposure time is such that camera shake occurs and the shutter is controlled at the low-speed limit exposure time, the exposure will be insufficient, go to step #322 and go to b37 to b34. Set the data '0010'' to make the green light emitting diode L blink,
Proceed to step #323. On the other hand, if the exposure time obtained based on the photometric value in step #320 results in proper exposure without camera shake, select b3? in step #321. ~Set the data '0001''' in b34 to make the green light emitting diode L light up, and #32
Move to step 3. In step #323, the display data is transferred, and the terminal pt+ is set to "Low" so that the flash does not emit light.
Move to step 0.

If it is determined in steps #301 and 302 that the mode is neither continuous photography mode nor non-flash photography mode, it is determined in step #303 whether the mode is self-timer photography mode. When in self-timer shooting mode, the flag STF is set to 1'' and the process moves to step #306.On the other hand, when it is not in self-timer shooting mode, it is determined whether the mode is normal shooting in step #305, and normal shooting is performed. mode, the process moves to step #306.On the other hand, if it is determined in step #305 that the mode is not normal shooting mode, the mode is set to close shooting mode or F1.
This is the ll-in F 1ash shooting mode, and flash photography is performed regardless of the exposure time (photometry value), so #
The process moves to step 307. On the other hand, when in self-timer shooting or normal shooting mode, it is determined in step #306 whether the exposure time based on the photometric value is an exposure time at which camera shake occurs, and if camera shake occurs, step #3
If camera shake does not occur in the flash photography operation from step #321 described above, the process moves to the steady light photography operation from step #321.

In step #307, it is determined whether or not the fullness is 20K, and if the fullness is not 2OK, the process moves to #330.

In step #330, the boost operation is started, data of "1000'" is set in b37 to b34, the red light emitting diode L3 is blinked, the display data is transferred, and after waiting for a certain period of time, photometry is started in step #334. It is determined whether the switch Sl is "ON". If S is OFF, the register COR is reset in step #335, and then the above-described S, OFF subroutine is performed, and then the process moves to step #342, which will be described later. On the other hand, if SI is ON, "1" is added to the contents of the register COR in step #340, and it is determined whether the contents of COR have reached a certain value K in step #341. If K has not been reached, the process returns to step #307, and if it has not reached 20, the operations described above are repeated. Then, in step #341, register C
When it is determined that the content of OH has reached K, the predetermined time in #333 has been counted up to now. If this (-fixed time) XK is set to, for example, 0.5'sec, Q, 5'
When sec has elapsed, the process moves to step #342, and thereafter, as long as the photometry switch S is closed, exposure control is not performed even if the release switch S is closed (no photographing operation is performed). □If it is determined that the state is fully charged 2 OK in step #307, step-up is stopped in step #308, detection of the charging state is stopped in step #309, and the process proceeds to step #310. Transition. In step #310, it is determined whether terminal +1124 is set to 'High' at a subject distance (long distance) where the amount of light emission is insufficient, and if the amount of light emission is insufficient, ba7 to b34 are set to '0100 “ Set the data to make the green light emitting diode L4 flash.On the other hand, if the amount of light emitted is not insufficient, b3
Data of "'1100" is set in 7 to b34 to turn on the green light emitting diode L4. and,#
In step 313, the display data is transferred, and in step #314, the terminal p'21 is set to "High" so that the flash will emit light, and the process moves to step #315.

Step #315 determines whether it is in close-up shooting mode, and if it is in close-up shooting mode, terminal P22 is set to "High", and if it is not in close-up shooting mode, terminal +1122 is set to "Low".
", and the process moves to step #370 in Figure 13. As mentioned above, the close-up shooting mode is set to F 1ll-in F.
If the same operation as in the 1ash shooting mode is to be performed, the terminal p22 and the transistor BT7. B.T.
, resistor R8, and this step #315.316,31
7 can be omitted.

When it is determined that the contents of register COR become K in step #341 and 0.5 seconds have elapsed, #34
The process moves to step #2, resets the contents of the register COR, enables operation by interrupt signals to the terminals 1tO, +t, and moves to step #345. #345
In the step, it is determined whether the state is 2 OK, and if the state is not 20, the process moves to step #346, and it is determined whether the photometry switch S remains ON. And if it is OFF #347
The above-mentioned S, OFF subroutine operation, Sl is ON.
If so, return to step #345.

If it is determined in step #345 that the state is complete 2'OK, the process moves to step #350, and 10 seconds of data is set in the timer. Then, after enabling the operation by timer interrupt and setting the flag CHF to "1", it is determined in step #353 whether or not the charge is 10K.

And if it is not in the state of completion 10, #354
The process moves to step #346 and #347, and then returns to step #353.

When it is determined in #353 that the state is fully charged (10), the process moves to step #356, where the boosting of the voltage is stopped, the detection of the charging state is stopped, and the flag CHF is set to "O°". Then, the process moves to step #359. In step #359, wait until the photometry switch S1 is turned OFF, and then switch the S
When , becomes OFF'F, data 3m1n is set in the timer, the OFF subroutine of Sl is executed, and the microcomputer MC stops its operation. Here, 3mrn, when the mode is set by mode setting button 3, 3m1n,
This data is used to automatically return to normal shooting mode when the time has elapsed. If the photometry switch S1 is turned on during this time and no photography is performed, this step is provided in order to extend the time for automatic recovery while the photometry switch S1 is turned on.

To summarize the preparation operations for flash photography explained above,
When it is determined that flash photography is necessary (performed), it is determined whether the state of full completion 2 is OK, and
If it is 0, it is possible to shift to exposure control operation. On the other hand, full completion 2
If it is not 0, boost operation is performed, O, ' 5 se
If it becomes full 2 OK during e, it is possible to shift to exposure control operation.

Q: If the charge does not reach 20K within 5 seconds, the exposure control operation cannot be started while the photometry switch S1 is closed, and the step-up operation continues regardless of whether the photometry switch S1 is ON or OFF. The boost operation continues until the voltage is reached. Note that when it is determined that flash photography is necessary and it is determined that the state is not fully charged 2 OK, the boost operation is started, but the metering switch S1 is turned ON.
It is also possible to disable the transition to the exposure control operation as long as it remains as it is, and omit the portion that enables the transition to the exposure control operation during the aforementioned 05 seconds. In order to do this, steps #333, 335, 340, 341, and 342 are omitted, and when it is determined in step #334 that SI is ON, immediately proceed to step #343, When it is determined in step #334 that Sl is OFF, the process goes through the subroutine #336 and returns to step #3.
What is necessary is to proceed to step 43.

When the preparation operation for steady light photography or flash light photography is completed, the process moves to step #370 in FIG. 13. #37
In step 0, it is determined whether the photometric switch S, is ON, and if it is OFF, the process moves to step #394 to perform a return operation to the state before S,I)<ON. If Sl is ON, then in step #371, it is determined whether the release button 1 is pushed to the second step and the release switch S2 is turned ON. And O
If it is not N, the process returns to step #370 and waits for the release switch S2 to turn ON while determining whether the photometering switch is turned OFF. When it is determined in step #371 that the release switch S2 is closed, the process proceeds to step #372, where it is determined whether the flag STF or PA1'' is set in the self-timer photographing mode. Then, if the flag STF is "1", move to step #373 and set 10 seconds of data in the timer (0 seconds is the time for the self-timer) b37 to b3
To 3' o o o.

1'", the red light emitting diode L1 for self-timer display blinks, and the remaining light emitting diodes L, ~L
4 is turned off, and the display data is transferred. Then, in #376, the microcomputer MC stops its operation by enabling the operation by the interrupt signals to the terminals +to and +L and the interrupt operation by the timer.

Then, the light emitting diode L only blinks for 1 Qsec. It should be noted that interrupts are possible during the self-timer time when various operations (
This is to cancel the self-timer by rewinding, opening/closing the back cover, opening/closing the lens cover, switching modes, pressing down the release button, etc.).

When 1Qsec has elapsed, the microcomputer MC is interrupted by a timer and performs the operation of step #245 in FIG. In this case, the flag STF is "1°", so #
#2 after steps 245, 255, 265, 275
Proceed to step 76. Then, in step #276, a red light emitting diode L for self-timer display,
To turn off the light, set b33 to 0°, then transfer the display data, then set the flag STF to 0°, and
The process moves to step #380 in FIG. 3 and an exposure control operation is performed.

When the flag STF is 0" in step #372 or when the self-timer time (10 seconds) ends, #3
Moving to step 80, the terminal p, is connected. A high pulse is output to start the exposure control operation and lens movement. Then, in step #381, the flag RLF is set to "1". This flag is a flag indicating that exposure control is in progress. Set the data of 50m5ec in the timer, enable timer interrupt, and move to step #384.In step #384, the exposure control mechanism (
For example, the lens moving mechanism) starts operating, and the switch L
Wait for ES to turn on. If 5Qmsec elapses before the switch LES is turned ON, in this case, the exposure control mechanism is not operating normally for some reason, and a timer interrupt is generated, starting from step #245 in Figure 11. Perform the following actions.

In this case, the flag RLF is "1", so #245. 25
5. After steps 265, 275, and 280, the process moves to step #281. At step #281, the terminal is +711)
19 as "'High", the power supply transistor BT,
○FF, AE lock is released. And then p+
*+ Set p22 to "Low" to stop detection of the charging state of the flash and cancel the close-up shooting mode. Then, the flag RLF is set to 0'', and b37 to b34 contain data for turning off the light emitting diodes L and L4.''
'oooo' and transfer the display data. Next,
Connect terminal ito in step #286.

Microcontroller M enables operation by interrupt signals to itl
C stops operating.

If it is determined in the step #384 that the switch LES has been turned on within 50 m5ec, the timer interrupt is not accepted in the step #385, and the exposure control operation by the exposure control circuit EC ends in the step #386. do,
Wait until the terminal p25 becomes "'High'". When the exposure control operation is completed and it is determined that the terminal P26 has become 'High', the process moves to #388 and the winding operation is performed according to the winding subroutine described above.Then, when the winding operation is completed, the camera back If it is closed, "1" is added to the contents of the film counter register FOR, the counter display subroutine is operated, the display data is transferred, and the process moves to step #392.Meanwhile, If the camera back is open, the process immediately moves to #392 after the winding subroutine.In step #392, it is determined whether the photometric switch S1 remains closed, and if the photometric switch S1 is closed, the process proceeds to #392. #39
Move to step 3. Then, it is determined whether the continuous shooting mode is selected, and if it is not the continuous shooting mode, the process returns to step #392 and waits for the photometry switch to turn OFF.

On the other hand, if it is determined in step #393 that the mode is continuous shooting mode, the process returns to step #298 in FIG. 12 to prepare for the next exposure control operation.

Therefore, in the continuous shooting mode, only steady light shooting is performed as described above, and shooting is repeated as long as the release switch s2 is closed.

When it is determined in step #392 that the photometry switch Sl is turned OFF, the process moves to step #394, where the above-mentioned S and OFF subroutines are performed, and the process proceeds to step #39.
Move on to step 5.

In step #395, it is determined whether the flag RLF is "1". If it is "1", exposure control operation is performed and the photometry switch S1 is turned OFF.
Move to step #396 and set flag RLF to “Oo”
Make it. Next, set "001" data in b32 to b3o, automatically return to normal shooting mode for the next shooting, transfer display data, and connect terminal itO+ IL
#215 in Figure 11
Go to step 2 and boost the flash voltage. #3
If it is determined that the flag RLF is O'' at step 95, the process moves to step #400 and the timer is set to 3m1n.
Set the data for the timer, 1j. , ijl, the microcomputer MC stops its operation while being enabled to operate according to the interrupt signal from ijl.

In other words, when the flag RLF is "Opa", this corresponds to the case where the exposure control operation is not performed and the metering switch SL is turned OFF, and in this case, automatic return to the normal shooting mode is performed after 3m1n. The microcomputer MC performs a preparatory operation and then stops its operation.

Next, the rewind switch MRWS is turned ON by manual operation.
The following describes the operation when the switch ARWS is turned on when the film reaches the final frame or the film is stretched to the final frame. In the above state, the photometry switch S1 is set to O.
If it is FF, the microcomputer MC performs the operations from #1 in FIG. 9, #l, 2. 3. 4. After step 5, the process moves to step #6. In step #6, the presence or absence of film is detected, and if there is no film, the terminals ito and
The microcomputer MC stops its operation while allowing the interrupt operation by it. If the presence of film is detected in step #6, the process moves to step #7, where it is determined whether the back cover is closed. If the camera back is closed, t125+b24 is set to "No", the winding display section 33.34 is turned off, and the rewind display section 31.32 is turned off.
are lit alternately. Next, bsz+ b3+
+ bso is set to data "001" to set the normal photographing mode, and b37 to b33 are set to 'ooooo' to turn off the light emitting diodes L1 to L4.

Then transfer the display data in step #13 and #14
Move to the next step. In step #I4, the state of the switch SPS, which is linked to the driven sprocket that rotates in conjunction with the film advance and is turned ON or OFF in accordance with the rotation of the driven sprocket, is determined. And switch SPS is O
If it is N, set the flag SPF to 1", if it is OFF, set it to °00.

This flag SPF is the state of the switch SPS and the flag SP
Switch SPS is determined by combining the state of F.
is provided to detect a change in the state of the next,
terminal p,. 1) Set 11 to "High" to reverse the motor MO and start rewinding the film, then set the timer to 1/4 sec, and then set the timer interrupt to operate. Then, the flag RWF indicating that rewinding is in progress is set to 1°, and the process moves to step #28.

In step #28, the automatic rewind switch ARWS is set to O.
It is determined whether the flag is N or not, and if it is ON, the flag ARP is set to "0", and if it is OFF, the flag ARP is set to "0°" and the process moves to step #21.

In step #21, it is determined whether the film advance switch FWS is ON. If it is ON, the rewinding subroutine of #22 is performed, and the process returns to step #21.

This operation is repeated while the film advance switch FWS is ON, and when it is OFF, the process moves to step #23. Then, in step #23, it is determined whether the switch FWS is OFF, and if it is OFF, the rewinding subroutine is performed in #24, and the process returns to step #23.

Then, this operation is continued, and when it is determined that the switch FWS is turned on, the process moves to step #25.

In step #25, "1" is subtracted from the counter register FCR, and in step #26, a counter display subroutine is operated, display data is transferred, and the process returns to step #21. The above operations are performed during the rewinding subroutine when it is determined that the back cover is opened, when it is determined that the film rewinding is completed, and when it is determined that an abnormality has occurred in the rewinding operation. is repeated until the

Next, the operation of the rewind subroutine starting from #30 will be explained. In step #30, it is determined whether the camera back has been opened, and when it is determined that the camera back has been opened, step #3
In step 1, connect terminals p+o and pth for 50m5ec.
The brake is applied to the motor M○ by setting it to "High", then both terminals are set to "Low", and the process moves to step #93 in FIG. 10, where the operation for opening the back cover is performed. When it is determined in step #30 that the back cover is not opened, in step #32, the film detection switches FDS, , FDS,
It is determined whether the film is not detected in both cases. If both the switches FDS and FDS are not detecting the film, the process moves to step #46, where it is determined whether the flag ARP is "1'° or not, and if it is "0", the manual rewind switch is switched. This is a case where the MRWS is ON and rewinding is being performed, and in order to finish rewinding with the leading edge of the film sticking out of the film container, the process immediately moves to step #33 and the motor MO is turned on.
to stop rewinding. On the other hand, ARP is "1'.

If so, the automatic rewind switch ARWS is turned on and rewinding is performed. At this time, use #4 to prevent the leading edge of the film from getting caught in the film container.
By waiting for a certain period of time in step 7, switch FDS,
Even if is turned off, rewinding continues for a certain period of time, and then #
At step 33, the motor MO is stopped and rewinding is stopped.

Next, in step #34, set bt5+bt3+bt2 to 011°, turn off the rewind display section 3L32,
The open and close display sections 36 and 37 of the back cover are turned on alternately, and display data is transferred. Then, operation by timer interrupt is disabled, operation by interrupt signal to terminal +to+ +t is enabled, flag RWF indicating that rewinding is in progress is set to II OII, and flag RBF indicating back cover closing is set to 1'.
to stop working.

When the presence of film is detected in step #32, it is then determined in step #40 whether the flag SPF is "1". If it is '1'', then in step #41 it is determined whether the switch SPS is ON. On the other hand, if SPF is "O°', switch S in step #42.
Determine whether the PS is turned off. If SPF is "1" and the switch SPS is OFF, the switch SPS has changed from ON to OFF, so the flag SPF is set to '0', and on the other hand, the switch SPS is changed from ON to OFF.
F is “O゛.

When switch SPS is ON, switch SPS is OFF.
This means that the flag has changed from ON to ON, so set the flag SPF to “1”.
Then, in step #45, 114 seconds of data is set in the timer and the process returns to the return address.On the other hand, if it is detected that the switch SPS has not changed, the process proceeds to the return address. Return.As mentioned above, even though the special film is installed and the film is detected, the film may not be rewound or the battery BA may be exhausted.
If the state of the switch SPS does not change during ec, a timer interrupt is generated, and the operations starting from step #245 in FIG. 11 are performed. In this case, since the flag RWF is "1'°, the process moves to step #256 after passing through #245 and 255. In step #256, the motor MO
, set “0°” to b and 5, and rewind display 3.
1.32 is turned off, and '11 is set to b23+b22.
” and open the camera back.

The closed display portions 36 and 37 are turned on alternately, and display data is transferred. Next, the flag RWF indicating that rewinding is in progress is set to "O'°," the flag TIF indicating that an abnormality is detected and rewinding is stopped is set to 1°, and only the interrupt operation by the interrupt signal to the terminal ito is performed. Then, the flag RBF indicating the closing of the back cover is set to "1", and the microcomputer MC stops its operation.

In the above description, the reason why the flag RBF indicating the closing of the back cover is set to "1" at the end of film rewinding will be explained. When the film is stretched with the back cover open, the switch AR
When WSh<ON, the terminal it.

An interrupt signal is input to the microcomputer MC, and the microcomputer MC starts its operation, but in step #7, it is determined that the back cover is open, and the microcomputer MC does not perform the rewinding operation. When the back cover is closed in this state, an interrupt signal is input to the terminal it0, and the microcomputer MC starts operating again, and in step #5 it determines that the switch A RWS is turned on. Therefore, perform a rewind operation. Therefore, in this case, the film will be rewound when the back cover is closed.If the flag RBF is set to "1°" after the rewinding operation is completed, the above-mentioned case can be avoided. Even if the flag RBF
A signal corresponding to the state of the camera back will be set.

If the back cover is opened and the film is stretched, #
7 to step #196 in FIG. 11, where the state of the lens cover is determined. This is because the back cover may be opened and the lens cover may be opened/closed with the film stretched. Note that even if the mode button 3 is operated in this state and an interrupt occurs, the mode switching operation will not be performed.

Next, the operation when the back cover is opened will be explained.

When the back cover is opened, the switch BKS turns on and the terminal it
An interrupt signal is input to o, and the first
Perform the operations from step #90 in Figure 0. Note that when the back cover is opened during rewinding, the process moves from steps #30 and #31 in FIG. 9 to step #93. In step #90, it is determined that the camera back is open, and in step #91, it is determined that the flag RBF is 1". In step #93, RBF is set to O'°. #9
Move on to step 4. In step #94, it is determined whether or not a film is mounted. If the film is mounted, the flag FEF is set to "l", and if it is not mounted, the flag FEF is set to 0".

This flag FEF is provided to issue a warning by flashing the film display section 35 when the back cover is opened with the film still attached and the back cover is closed again with the film intact, as described above. be.

Next, in step #97, register F for film counter
Set 'OOH'" in OR, perform the subroutine for displaying the film counter, and then set data of °'o o o ooo" in b27 to b24 to indicate that the film sensitivity is fixed. The display section 28 is turned on, the film display section 35 is turned off, and the winding display section 33, 34 is turned on.
, the rewind display sections 31 and 32 are turned off. Next, 1
)32+ b3++ Set the data of "001°" in b3o to set the normal shooting mode, and set "'o" in b37 to b33.
Set o o o oo゛, light emitting diode L,
~L4 is turned off. Then, data corresponding to 15O100 is set in the register SVR, and this data is set in the display register DPRo.

Next, enter the data “O” to display the number of films.
Set AH"° in register DPR, b23I'b2
2 is set to "10" to turn on the back cover open display section 37, transfer the display data in step #105, and #
The process moves to step 106. In step #106, it is determined whether or not a film is loaded. If it is loaded, in step #114, operation is enabled by interrupt signals to terminals ito and iL, and the operation is stopped. On the other hand, if the film is not loaded, the process moves to step #109 and determines whether the flag TIF is "1". If TIF is "1", an abnormality is detected during rewinding and the motor is turned off. This is a case where the MO has stopped, and if the winding subroutine is performed in step #111 and the film is successfully wound, then the winding subroutine is performed again.Then, two winding operations are performed. If it is done normally, set the flag TIF to “Oo” #
The process moves to step 114. This operation is to check whether rewinding has stopped due to battery exhaustion.The reason why the winding operation is performed twice is because if the winding is in the middle when the back cover is opened, the winding will start immediately. This is because the battery is not able to be checked because it is in the completed state. Incidentally, the number of times of winding is not limited to two, but may be three or more times, and safety can be ensured by checking the battery by increasing the number of times. In step #109.

#1 when it is determined that the flag TIF is "'O"
In step 10, it is determined whether or not the winding is completed. If the winding is not completed, the remaining winding is performed in step #112, and if it is completed, the process directly proceeds to step #114.

Next, we will explain the operation when the camera back is opened with a film attached and the film is removed. In this case, the pulse from the one-shot circuit O83 is output from the output of the AND circuit AN, and an interrupt signal is input to the terminal ito to perform the operation from #1. And #1~
5. After steps 90, 91°190, # in Figure 11
The process moves to step 191. Then, in step #191, the flag FEF is set to "°O" and is set to "1" in #95), and the winding operation is performed in steps #192 and 193. This is to check the battery in case an abnormality is detected during rewinding and rewinding is stopped. Then, when the winding is performed normally twice, the flag TIF is set to '
0", the microcomputer MC stops its operation while enabling operation by an interrupt signal to the terminal 1tO+IL.

Next, the operation when the lens cover is closed or opened will be explained. In this case, exclusive OR circuit EO,
A pulse is output from the terminal it.

Input an interrupt signal to start the operation from step #1, go through steps #1 to 5, 90, 91 or 92, 190, and move to step #196, when the lens cover is opened. Determine whether there are any. If it is open, the flag CVF is set to °11 in step #197.
If it is Pa 1'', the state of the lens cover has not changed, so in this case it means that the mode switch MO3 was operated and an interrupt operation was performed, and the process moves to step #227. In step #227, it is determined whether the back cover is open or not. If it is open, mode switching is not accepted, so the microcomputer MC enables operation by an interrupt signal to the terminal +to+iL and stops its operation.

If it is determined that the flag CVF is "O°" in step #197, it means that the lens cover is released from the closed state, and the process moves to step #198, where flag C is set.
Set VF to 1. and b32゜1)31+ bso
Set “001'' for normal shooting mode, and set b2 to
1 is set to "1", and the mode displays 16 to 27 and the camera name display 15 are turned on. Then, the display data is transferred and the process moves to step #210.

If it is determined in step #196 that the cover is closed, the flag CVF is set to “Oo” in step #203.
Determine whether or not. If the CVF is 0", the cover remains closed, and in this case, an interrupt is generated by operating the mode switch MO3. However, when the lens cover is closed, the mode switching is not performed, so in step #195 the terminals ito and
The microcomputer MC stops its operation while enabling operation by an interrupt signal to it.

On the other hand, when it is determined that the lens cover has been switched from the open state to the closed state, the flag CV is set in step #204.
Set F to “O”. Next, display section 1 for mode and camera name.
6 to 27. Set bul to "O°" to turn off 15, and set "'o o o o o o°" to b3'l to b33 to turn off light emitting diode L4. , transfers the display data and moves to step #210. In step #210, operation is enabled by an interrupt signal from the terminal tto, and the flag COF is determined. This flag COF is set to "Opa" during which time the film counter can be preset.If COF is '1' and the lens cover is closed, the microcomputer MC will stop operating. In the end, only the interrupt signal from the terminal tto is accepted, and the photometry switch S1
Interruptions will not be accepted. On the other hand, if the CVF turns 1° and it is determined that the cover is open, the above-mentioned #215
Perform the operation from step , boost the flash, and
Enables interrupts to terminal 1t. In addition, when the flag COF is 1'' in step #211, if the cover is open, the operation is enabled by an interrupt signal to lt, it2, and if the cover is closed, an interrupt signal to lt is enabled. Return to the return address with operation possible only at .

Note that in any case, ito can be interrupted by step #210.

When the mode switch MOS is closed, the lens cover is opened, and when the back cover is closed, the terminal is opened. The operation from step #230 is performed in response to an interrupt signal.

First, in step #230, b+z+ b+++ b
Determine whether 3o is 110", and if it is "110", #
In step 232, data "001" is set to set the normal shooting mode. On the other hand, in step #230 b3
When it is determined that 2゜b31+b30 is not 110'', ゛1゛ is added to this content and the mode is switched to the next shooting mode in the above order.Then, the light emitting diodes L1 to L4
In order to turn off the light, "'ooooo" is set in bG7 to b33, and the display data is transferred. Next, the mode is switched, and for 3 min, the flag MOF, which is "1pa", is set to "1", data of 3m1n is set in the timer, and interrupt operation by the timer, itO, and it+ is enabled, and #
The process moves to step 238. In step #238, it is determined whether the flag COF is "1°", and if it is 1°, the microcomputer MC stops operating as it is. - On the other hand, if it is 0°, it returns to the return address.

Switching operation by mode switch MO3, or after mode switching, optical switch S1 is turned ON and then OFF.
If the interrupt operation by ito is not performed before m1n has elapsed, the timer interrupt operation will be performed after 3 min has elapsed. At this time, perform the operation from step #290 in FIG. 11, and first set the flag MOF to "
O'', and set "001 to b32+t131+tl+o"
” data to set the normal shooting mode.Then, the display data is transferred, and the microcomputer MC stops its operation, enabling operation by interrupt signals to terminals +1o and +1.Therefore, the normal shooting mode is set. The mode includes 3 m1 from the end of the exposure control operation, the operation of the mode-93-i-mode switch MO3, and the photometry switch SL.
n. Automatically restored by opening/closing the camera back or rewinding.

Next, the operation when the power supply battery BA is installed will be explained. When the power supply battery BA is installed after the backup by the capacitor C1 is not performed, a reset signal is input to the microcomputer MC by the capacitor C3 to the reset terminal RES, and the microcomputer MC inputs the reset signal to the microcomputer MC at #40 in FIG.
Perform the operations from step 5. In steps #405 and 406, the output terminal and child are set to the initial state, and in step #407, the flag is set to the initial state. Next, set “OOH” in the film counter register FCR, and set b3□+ b31+
Set b30 to "001" to set the normal shooting mode.

Next, b3? -B33 is set to "ooooo", light emitting diodes L and -L4 are turned off, b25 is set to 0, rewinding display section 3], 32 is turned off, b. “0°
Then, the counter display section 38 is turned on. next,
It is determined whether the lens cover is open or not, and if it is open, the flag CVF is set to "1'", the bul is set to "1°", and the mode display sections 16 to 27 and the name display section 15 are turned on. On the other hand, if it is determined in step #411 that the lens cover is closed, the flag CVF is set to “O゛°”.
Bind, set btt to "'0", mode display parts 16 to 27
, the name display section 15 is turned off.

Next, in step #420, it is determined whether or not the back cover is open. If it is closed, the process moves to step #421, and if it is open, the process moves to step #426. In step #421, the flag RBF is set to 1" and FEF is set to O°'. Then, b23 and b22 are set to "01pa" to turn on the back cover closed display section 36 and indicate whether or not film is attached. To detect. Then, if the film is installed, set the flag BAF to "1" to make the counter blink.
In order to turn on the film display section 35, bxa is turned on.
1'', reads the ISO data from the container and moves to step #438.Meanwhile, #4
If it is determined in step #24 that no film is attached, the flag BAF is set to ``0'' in step #425.
Then, set “00” to b27+b2B and fix the fixed I.
The SO sensitivity display section 28 is turned on, and the film display section 35 is turned on.
is turned off. Next, add l5O10 to register SVR.
0 data is set, this data is set in the register DPRo, and the process moves to step #438.

If it is determined in step #420 that the back cover is open, the process moves to step #426 and the flag RBF is set to '0°. Next, set the flag BAF to 0'' and #
In step 428, lO'' is set in b23+btt, and the back cover open indicator 37 is turned on. Then, it is determined whether or not the film is attached, and if it is attached, the FEF is set to "1", and if it is not attached, the FEF is set to "0".
Then, the process moves to step #435.

In step #438, a counter display subroutine is operated, and in step #439, it is determined whether winding is completed.

Then, if the winding is not completed, b24 is set to "1 pa" and the winding display parts 33 and 34 are turned on alternately,
After transferring the display data, a winding subroutine is performed and the process moves to step #444. On the other hand, #4
If the film winding is completed in step 39, the process immediately moves to step #444, sets b24 to "O", and turns off the winding display sections 33 and 34.Then, the display data is transferred, and the terminal ito, it, it,
The counter register PCR is reset, boosting operation and charging state detection are started, and the process moves to step #455.

Step #455 in Figure 14 sets the flag COF to “°O”.
Pa and pa. This flag COF remains "O" while the film counter can be preset. Next, complete 2
It is determined whether the state is OK, and if the charge is not 20K, the process moves to step #457. In the step #457, it is determined whether the flag COF is "1". If it is "1", the process immediately returns to the step #456. On the other hand, if the flag COF is "O", the step #458
Wait for a certain period of time at step , and the contents of register PCR will be “
1° is added, and it is determined whether the PCR content has become T. And if it is not T, #456
Immediately return to the step , and if it is T, connect it to the terminal it.
Disables operation by interrupt signal to z, flag COF
is set to "1" and returns to step #456.

If it is set to (fixed time of #458) x (T times) - 30 seconds, the counter can be preset for 30 seconds. If the state reaches 20 when the process is repeated while repeating the above operations, the process moves to step #465, resets the register CHR, and determines whether the state is 10 when the process is complete. If the state is not 10, it waits for a certain period of time in step #470 and determines whether the flag COF is ``1''.
Since sec has elapsed, the process moves to step #476. On the other hand, if COF is "O", add °°1" to the contents of register PCR in step #472, and determine whether the contents of PCR have become T. If it is T1, 30 seconds have elapsed. Therefore, the operation by the interrupt signal to it is disabled, and the flag COF is set to "1".
The process moves to step 476. On the other hand, the content of the PCR is T
If it is not 1, the process directly proceeds to step #476. Then, in #476, 1' is added to the contents of the register CHR to determine whether the contents of the register CHR have reached T2. And if it is T, (#4
70 fixed time) x (T2 times) - 10 seconds have passed.

is set to ``1'' to make the counter display section 36X flash, transfer the display data, and return to step #485.On the other hand, if the content of CHR is not T2 in step #477, step #466 Return to

If the status is 10 complete in step #466. is set to O゛, the counter is turned on, the display data is transferred, and the process moves to step #485. Then, the pressure increase and the detection of the fully charged state are stopped, and the process moves to step #487. In step #487, it is determined whether the flag COF is "1" or not, and if it is not '1°', wait for 30 seconds to elapse as described above, and
When , the operation based on the interrupt signal to the terminal it2 is prohibited, the flag COF is set to "1°", and the operation is stopped. On the other hand, when it is determined in step #487 whether COF is "1", the microcomputer MC immediately stops operating.

If the counter preset or tohotan 4 is operated when operation by an interrupt signal to terminal +11 is possible, counter switch CO8 is closed, an interrupt signal is input to terminal it2, and operation starts from #495. .

If no film is attached or the back cover is open, the microcomputer MC immediately stops operating.

On the other hand, if the back cover is closed and the film is attached, #4
Move to step 97, and if flag BAF is "1'°, set it to 0'' and move to step #499. Then,
Determine whether register FCR is “00H” or not, and set “00M”
``If so, set data ``03H'' to display ``1'', and if not ``OOH'', add 1 to the contents of FCR. If the contents of register FCH become data "2AH" exceeding the display limit, it becomes "1" in step #502.
"'03H" to be displayed is set and the process moves to step #503. On the other hand, if the content of FCR is '2AH'° in step #501 and it is empty, then step #503
Move to the next step. Then, in step #502, the counter display subroutine is operated, the display data is transferred, and when the interrupt signal of itz is received, the register PCR is reset to extend the time and the process returns to the return address.

In the above embodiment, if the power supply battery is replaced and the counter is not preset when the back cover is closed and a film is attached, the warning will continue until the back cover is opened and closed. However, if the flag BAF is 1° after the exposure control operation is completed and before the winding subroutine (#388) is started, the register FC is
02H” to R.

may be set so that 1"' is displayed when the film winding is completed, and the flag BAF may be set to 0'" so that no warning is issued. Furthermore, when the photometric switch SI is closed, it is determined whether the flag BAF is "1" or not, and when it is "°l", the register FCR is set to "1".
'03H' and the flag BAF may be set to '0'. In the above case, the camera back may be opened without the photometry switch S1 turning on, so if the flag BAF is "'1" when the camera back is opened, it is necessary to set it to "0".Furthermore, It may be possible to preset the time up to the first winding, and the time limit may be removed, or only the time limit may be set.

FIG. 15 is a flowchart showing a modification of this embodiment, in which flash photography is performed even in continuous shooting mode when flash photography is necessary;
This is a modification of FIGS. 2 and 13. In case of this modification #30
Even if continuous shooting mode is determined in step 1, #30
Determine whether flash photography is necessary in step 6,
If necessary, it is determined in step #307 whether the state is complete 2 OK. Then, if the fullness is 20, the process moves to step #308 and moves to the exposure control operation.

On the other hand, if it is not fully charged 20, it depends on whether the flag RLF is 1°' or not; if it is not "1", it moves to step #330, starts boosting, and waits for O65see. On the other hand, if the flag RLF is "1", it means that at least one shot was taken in continuous shooting, and in this case, the release is in the shutter release state, waits for the metering switch S1 to turn OFF, and moves to step #394. Therefore, in the case of this modification, in continuous shooting mode, continuous shooting is performed in constant light shooting mode, and in flash shooting mode, shooting is performed if the full state is 20 before starting shooting. If the state is not completed and OK, no photography will be performed, and flash photography will be performed only once.

When the power supply battery is replaced with the back cover closed and the film attached, a warning will be given by displaying "00".
o3HI+ may be preset to display "1". If the counter is not preset, the count value of the counter will increase sequentially from rIJ.

In addition, in the above-described embodiment, only the photometry switch SI is turned on except when the camera back is opened or exposure control is performed.
The counter is not preset even when the metering switch S is turned OFF, but in this case, the counter is preset from 5as5. a47, 3.55, 3
61. After =401, when COF is “1°”, PC
An operation of resetting R and returning to the return address may be added.

Also, when the power battery is replaced with the camera back closed and the film attached, registers FC and R will be set to "'0".
3H'" is preset so that the display r00J flashes.Also, the operation by interrupt signals from the terminal IL is prohibited for a certain period of time, and the prohibition is canceled when the preset operation is performed. In addition, in the above embodiment, there are five types of shooting modes in addition to the normal shooting mode, but the number of modes may be reduced to, for example, self-timer shooting mode and continuous shooting mode, or there may be more shooting modes. You can increase the variety.

Furthermore, the mode display may be performed even when the lens cover is closed, the setting mode may be set to the normal shooting mode, and mode switching and the ON signal of the photometry switch Sl may not be received.

Table 1 Table 3 Table 4 Table 5 Table 6 Table 7 [Effects of the Invention] As detailed above, according to the present invention, when all frames are photographed, the film is completely wound up in the film container, so it is treated as a new film. On the other hand, if you want to rewind a film that has been partially shot and then reuse it, the tip of the film will automatically come out of the film container and finish rewinding. The film can be easily reloaded into the camera.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the appearance of an example of a camera to which the present invention is applied, FIG. 2 is a plan view showing an example of the display section of the camera shown in FIG. 1, and FIG. 4 is a plan view showing an example of a switch for the film winding stop position used in the camera shown in FIG. 1, FIG. 5 is a circuit diagram showing an example of a flash device, and FIG. 6 is a display. 7 is a front view showing an example of the viewfinder display of the camera shown in FIG. 1; FIG. 8 is a circuit diagram showing an example of the shutter control circuit; FIGS. 9 to 14 is a flowchart showing the operation of the device in FIG. 3, and FIG. 15 is a flowchart showing the operation of the device in FIG.
14 is a flowchart partially modified from the flow shown in FIG. 14 and FIG. 13. MC: Microcomputer, FWS: Film advance detection switch, MO: Film advance motor. ARWS...Switch that turns on when the film is stretched. Patent applicant Minolta Camera Co., Ltd.

Claims (1)

[Claims] (1) means for outputting a first rewinding start signal when tension of the film is detected during film winding; means for outputting a second rewinding start signal by manual operation;
or a rewinding means for rewinding the film based on a second rewinding start signal; a means provided in the film transport path for detecting the presence/absence of the film; and first and second rewinding means. means for storing which output of the start signal causes rewinding; and when the storing means stores the second rewinding start signal, rewinding means immediately when the detection means no longer detects the film; and means for stopping the operation of the rewinding means after a predetermined time has elapsed since the detection means no longer detects the film when the first rewinding start signal is stored. A film rewinding device characterized by: