JPH01198731A - Spare film feeding device - Google Patents

Abstract

PURPOSE:To move the non-exposed part of a film to an image frame position with an easy operation even if the film is partly photographed by automatically winding up a film which is equivalent to the set number of frames when the number of spare frames to be fed is set, and automatically winding up a specified quantity of films when the number of frame is not set. CONSTITUTION:Second detecting means COM, IN17, AN17, OS17 and PWE are provided; they detect whether the film which is equivalent to the set number of films is winded up or not when a discriminating means NO1 discriminates that the number of spare frames to be fed is set. Third detecting means AN13, OR11, FF11, AN10, OS15 and FWE are provided; they detect whether a specified quantity of films are winded up or not when the discriminating means NO1 discriminates that the number of spare frames to be fed is not set. When the second detecting means detect that a film which is equivalent to the set number of frames is winded up; the number of frames is set by means of a setting means PN, or when the third detecting means detects that the specified quantity of films are winded up, spare-feeding operation is stopped. Thus, the film is automatically winded up until the non-exposed part of the film arrives at the image frame position, and the operation is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a preliminary film feeding device for winding film prior to photographing.

Film must be loaded into the camera before shooting a single pass to l1, but simply loading the film does not allow the camera to shoot. That is, before loading, the edges of the film usually protrude from the container, so when the film is loaded, the edges are exposed to light and become exposed.

Therefore, it is not possible to record a subject image at that end. Therefore, after loading the film, it is necessary to pre-feed the film and wind the unexposed portion to the position of the image frame.

The sun is about to set; By the way, sometimes I reload the partially filmed film into the camera and take another shot. In such cases, conventionally, the photographing operation and the winding operation are repeated while the film is shielded from light by a lens cap or the like, and the film is advanced until the unexposed portion reaches the position of the image frame. Therefore, it was necessary to perform the photographing operation and the winding operation many times until the unexposed portion of the film reached the position of the image frame, which was extremely troublesome.

The present invention solves these problems and provides a film preliminary feeding device that can move the unexposed part of the film to the image frame position with a simple operation, even if the film has been shot halfway. The purpose is to

In order to achieve this object, the film pre-feeding device of the present invention includes: a winding means for electrically winding the film; a first detection means for detecting the amount of winding of the film; an output means for outputting a loading signal related to the loading of the machine; a setting means for setting the number of preliminary feed frames; a determining means for determining whether the number of preliminary feed frames has been set; based on the loading signal; , when the preliminary feeding start means for starting preliminary feeding of the film by the winding means and the determining means determine that the number of preliminary feeding frames is set, based on the output of the first detecting means,
a second detecting means for detecting whether or not the film has been wound for the number of preliminary advance frames set by the setting means; and when the determining means determines that the number of preliminary advance frames has not been set; , a third detection means for detecting whether a predetermined amount of film has been wound based on the output of the first detection means; and a third detection means for detecting whether or not a predetermined amount of film has been wound based on the output of the first detection means; When it is not detected that the number of frames of film has been wound up, or when the third detection means detects that a predetermined amount of film has been wound up, the winding means starts preliminary feeding of the film. It is equipped with a preliminary feed stop means to stop the feed.

In the film preliminary feeding device of the present invention having the above-described configuration, when the number of preliminary feeding frames is set by the setting means, the film is automatically wound for the set number of preliminary feeding frames. , when not set, a predetermined amount of film is automatically wound.

Figure 1 shows various data of the film (F) taken in the morning (Fl).
There are holes (IH) to (El-1) in the tip part before the position of
Fig. 2 shows the positional relationship of such signal holes (hereinafter, signal holes (IH) to (EH) are represented by (SH)) as shown in Fig. 1. It is a partially enlarged diagram.

As shown in FIG. 2, the signal hole (SH) is provided between two perforations (PH) adjacent to each other in the film feeding direction and above the upper end of the perforation.

In FIG. 1, the hole (IH) indicates the start of data by the signal hole (SH), and the hole (A) is a hole in which film sensitivity data is set in 5 bits. In this example, “'1
The data is "0101". (CH) is set to data corresponding to the number of frames taken on the film. In this example, it is "01°". (YH) is the expiration date data. Year data is set, and in this example it is 0.
It is 0110゛. Most significant bit 1 of this data
''.The lower 4 bits are a binary code from 0 to 9. Therefore, in this example, it indicates the year 86. (MH) is set by the month data of the expiration date data. 1 in 4-bit binary code
~12 is shown.

In this example, it is ``1001'', which corresponds to September. (EH) is a hole indicating that the signal hole (SH) has been completed.

FIG. 3 is a block diagram showing the entire camera to which the present invention is applied. (El) is a power supply battery, (SWI) is a photometric switch, and the transistor (
BTI) is for self-maintenance. (1) is a constant voltage source, and when the switch (SWI) is closed and the transistor (BT
, ) operates when conductive.

(3) is a well-known photometry, arithmetic and display circuit, and the terminal (
A film sensitivity signal is input from terminal (b).
An exposure time signal is output from , and an aperture value signal is output from (c). The switch (SH3) is the release switch,
(5) is a release circuit of the exposure control mechanism, and the specific internal circuit is shown in FIG. (BT, ) is a power supply transistor, (Mg+) is a release magnet with a permanent magnet as its core, and the electric charge charged in the capacitor (C1) causes the transistor (BTS) to conduct, causing the coil of the magnet (Mg+) to flow. The exposure control mechanism is released. (7) is the terminal (b), (
This is a well-known exposure control circuit that performs exposure control based on the exposure time signal and aperture value signal from c).

(SH5) is a switch that is closed when the exposure control operation is completed, and is opened when the exposure control mechanism is completely charged. (SH7) is a switch that is opened when a film is loaded and closed when no film is loaded, and is provided, for example, at the film insertion portion of the spool. (SWS) is a switch that is closed when the back cover is closed, and (SWZ) is a manually operated rewind switch.

(9) is the terminal (f), (i), (j), (k)
, winding the film based on the signal from (1);
This circuit has functions such as reading the signal hole (SH) of the film, empty film feeding (preliminary feeding), film counter, and film rewinding.The internal circuit is shown in Figure 5.
This will be described later based on FIG. When the film is attached, the terminal (1) is at °'Low', and the terminal (SCR,) is non-conducting.
A "High" pulse is output from q). As a result, the transistor (BTz) becomes conductive, the relay magnet <Mgz) works, and the switch (SWI) is closed. Furthermore, the constant voltage source (11) operates, and the motor (Ml)
Power supply starts. Further, since the base current of the transistor (BTU1) is supplied through the diode (D, ), the conduction of the transistor (BTz) is maintained even if the terminal (q) becomes "'Loi1'".

Here, the diode (DI), (D3) is connected to the terminal (q
) and the output of the constant voltage source (11). At this time, the cyrisk (SCR1) is non-conducting, so the resistor (R1) is connected in series to the motor (M), so the motor (M) rotates at a low speed and the film feed is also slow. . This operation is maintained for a certain period of time. By doing this, when you load the film with the back cover open, the film is fed at low speed for a certain period of time, allowing you to confirm that the film has been loaded securely. This prevents malfunctions such as the camera back being closed and the film not being fed.

When low-speed feeding for film mounting is performed for a certain period of time, a "High" pulse is output from the terminal (r), the transistor (BT, ) becomes conductive, and the transistor (BTz) becomes non-conductive, and the low-speed emptying occurs. Feeding stops. When the back cover is closed in this state, °'High" is again output from the terminal (q).
A pulse is output and idle feeding is started. At this time,
Since the terminal <1> is set to "High", the cyrisk (SCR,) is conductive and fast feeding is performed at high speed.

The jump feed Jl (preliminary feed amount) at this time is that if the jump feed amount is not preset, it will be fed until the morning light reaches the image frame position and then stop; if the jump feed amount is preset, it will stop. , the jump feed is performed by a preset amount, and then the jump feed is stopped. Presetting the amount of blank feed is very effective, for example, when loading partially filmed film into the camera.

From then on, like a normal motor drive device, the exposure control mechanism is charged and the film is wound up every time the photographing of the - frame is completed, and when the photographing of the final frame of the film is completed, the circuit (9) The internal motor automatically rewinds the tape, and once the rewind is complete, the series of operations ends. Further, even when the film has not been wound to the final frame, if the switch (SW++) is manually closed, the film is rewound. In addition, at the beginning of rotation of the motor (Ml), the exposure control mechanism is charged, and when charging is completed, the film is wound, and when charging is completed, the motor (Ml)
The mechanism is such that the film continues to wind up while the rotation of the film continues.

(19) surrounded by a broken line indicates the output part of film sensitivity data. (13) is a circuit that outputs film sensitivity data preset by the photographer. (15) is a data selector, and when the film sensitivity data from the film signal hole (SH) shown in Figure 1 is read, "
Based on the signal from the terminal (p) that becomes Higl+'',
The data from the data output terminal (FSD) of the circuit (9) is output, and when the terminal (p) is "Low", that is, when the film sensitivity data is not read, the preset data from the circuit (13) is output. Film sensitivity data is output. (17) is a D/A conversion circuit, which converts the data from the data selector into an analog signal, and performs photometry, calculation 1 display circuit (3) and data imprinting circuit ( 21).In the drawings below, the signal lines with diagonal lines indicate multi-bit signals.

(21) is a data imprinting circuit, and a switch (s
wts) is closed.

The data imprinting section of this circuit (21) is shown in FIG.
It is provided at the position shown in 4). This is because, as will be described later, imprinting is started based on a signal from the terminal (u) indicating that winding of the film has been completed after the end of photography. In this case, since imprinting is performed from the emulsion side of the film, the imprinting time can be controlled to a time corresponding to the film sensitivity. (23) is a clock circuit, the data terminal (TD) outputs copy transmission data, and (TP) outputs a plurality of clock pulses for timing control. Note that the clock circuit (23) has a liquid crystal display section that displays data for imprinting on the outside of the camera, and a switch (SWz+) is a switch that is closed when illuminating this display section.

(25) compares the expiry date data set on the film shown in Figure 1 (FDD) with the year and month data from the clock circuit (23), and This is a warning circuit that emits a warning sound if the expiration date has expired.

(E2) is a power supply battery for the data imprinting circuit (21), the clock circuit (23), and the warning circuit (25). Specific circuit examples of the above (21), (23), and (25) are shown in FIGS. 27, 28, 29, and 30.

(27) is a circuit for displaying film sensitivity.

This circuit uses the data input from the data selector (15) to set the commonly used film sensitivity (for example, ASAlo
If the data corresponds to a film other than 0 and ASA400), the sensitivity value will be displayed blinking, and if it is a commonly used film sensitivity, the display will remain lit. Further, this display is also performed by a liquid crystal, and the switch (SW2s) is a switch for illuminating the display section. A specific circuit example of this circuit (27) is shown in FIG.

FIG. 4 shows a specific example of the release circuit (5) shown in FIG. When the photometry switch (SW+) is closed and the constant voltage circuit (1) starts operating, power is supplied to this circuit, the power-on reset circuit (PRI) operates, and the voltage is output through the OR circuit (OR). Reset the flip-flop (FFI). Next, when the release switch (SW3) is closed, the terminal (e) of the circuit (9) becomes “Hi”.
gh” (signal that allows release, described later),
The output of the AND circuit (AND) becomes "High", and with this rising signal, the one-shot circuit (OS) outputs a "High" pulse for a certain period of time.

Then, the output 'L' of this one-shot circuit (O83)
Based on the falling signal to "oud", a "High" pulse is output from the Funshot circuit (OS controller), and the flip-flop (FFI) is set based on this rising edge.This causes the terminal (i) to When the voltage becomes ``High'', the power supply holding transistor (BTl) becomes conductive, and when the terminal (g> becomes ``Low'', the power supply transistor (Br3) becomes conductive.In addition, the one-shot circuit (O33) ) is sent from the terminal (h) to the transistor (BTs), and the release magnet (Mg+)
operates to release the exposure control mechanism. Here, during the output pulse of the one-shot circuit (O3,), the photometry switch (SW+) and the release switch (SW3) are closed almost simultaneously, which prevents the release from occurring before the photometry circuit is stabilized. This is longer than the time it takes for the photometry circuit to be powered and stabilized.

When the exposure control operation is completed, the switch (S
WS) is closed and the output of the inverter (IN3) is
At this rising edge, a "High" pulse is output from the one-shot circuit (O3s) and goes through the OR circuit (OR, ) to the flip-flop (FFI).
is reset. When the film winding is completed and the terminal (e) becomes "Higb", if the release switch (SW) remains closed, the output of the AND circuit (AND) becomes "Higb" again. , the release is performed again and the exposure control operation is performed. In other words, continuous shooting is performed. Also, if the release switch (SW, ) is open when the terminal < e) becomes "High", the camera In this circuit diagram, the “High” signal from the power-on reset circuit (PRI)
While the pulse is being output, the AND circuit (AN,)
It is desirable to input the output via the inverter to the AND circuit (AN) so that the output is "Low'".

5 and 6 are specific circuit examples of the circuit block (9) in FIG. 3. First, this circuit (9>) is directly connected to the power battery (El) as shown in Figure 3. Therefore, when the power battery (El) is installed, the output of the power-on reset circuit (PRl) The signal generated from the terminal (po,) becomes the reset signal for each circuit in FIGS.
WI) is output from the terminal (PO2) via the OR circuit (ORs), which also serves as a reset signal.

First, the motion IY when no film is attached will be explained. When the exposure control operation is completed, the terminal (f) becomes “L”
'ow' from the one-shot circuit (O81,).
“High” pulse is output and the OR circuit (OR7)
OR circuit (OR0,) from the terminal (NWI) (Figure 6)
A "High" pulse is output from the terminal (q) through the transistor (BTz) in FIG. 3, and the motor (M, ) operates. When the shutter charging is completed, the switch (SW, ) is opened and the inverter (IN
l,) becomes “High”. At this time, since the film is not attached, the switch (SW7) is closed and the terminal (FSS) is "'High", so the output of the AND circuit (ANa) is "'High". At the rising edge, the one-shot circuit (os'-) outputs a "High" pulse from the terminal (s), making the transistor (BT,) conductive for a certain period of time, and the transistor (BTz) becoming non-conductive, turning the motor (Ml) off. Rotation stops. Therefore, when no film is loaded, the motor (Ml) stops when the exposure control mechanism is completely charged, and the film winding RlM does not operate. In addition,
At this time, the flip-flop (FF3) is reset and the Q output (LHT) is 'Higl+', so the pulse from the output terminal (q) is sent to the AND circuit (ANa).
) (FIG. 6) and is also output from terminal (1). This pulse causes the thyristor (SCR, ) to conduct, so that the current flowing through the motor (Ml) does not flow through the resistor <R1), and the motor (Ml) rotates at high speed.

Next, the operation when the film is attached will be explained step by step. When the film is attached, the switch (SW t ) is opened, the terminal (j) becomes 'High', and the output of the inverter (IN?) becomes 'High'.

At this rise, 'H' is output from the one-shot circuit (O89).
A pulse of “high” is output and the flip-flop (F
F3) is set and the terminal (LHT) is set.
Becomes I+. Further, the timer (TII) counts a fixed time for empty feeding (preliminary feeding) for film loading based on a signal from the one-shot circuit (O3s).

Furthermore, in response to the falling signal of the output pulse of the one-shot circuit (OSS), a High'' pulse is output from the one-shot circuit (OS, .), and the signal from this terminal (LWI) is output from the OR circuit (OR+ The transistor (BTz) (Fig. 3) is turned on, and the film is fed blankly for film mounting.At this time, the flip-flop (FF3) is Q output (
Since LHT) is “Low”, AND circuits (ANs) (
The output (1) of Figure 6 remains II t, o, II,
The thyristor (SCR,) in Figure 3 is not conductive, so the current flowing through the motor (M,) flows through the resistor (R1), and the motor (Ml) rotates at a low speed, so that the film is not fed at a low speed. It will be done. This is to prevent the photographer from being surprised if the film starts to advance at high speed as soon as the film is loaded, and also to prevent him from feeling uneasy about getting injured at the edge of the film. This was done out of consideration.

When the timer (TII) finishes counting for a certain period of time, the output terminal (LW E 2 ) of the timer (T1.)
The flip-flop (FF3) is reset through the OR circuit (OR3) and the flip-flop (FF, ) is set.At this time, the back cover is not closed and the switch ( When SW*) is open, the output of the inverter (INll) is “High”
Therefore, the pulse from the □ timer (TII) is output from the terminal (LWE, ) of the AND circuit (AN3). This signal is output from the terminal (r) via the OR circuit (0R33) (Fig. 6), and the transistor (BTs) shown in Fig.
The transistor (BTI
I) becomes non-conductive, and the rotation of the motor (Ml) stops.

In addition, the pulse (L
WI) by flip-flop (FF2,) (6th
) is set, the Q output becomes "HiFih", the output of the OR circuit (OR2a) becomes "High",
The display circuit (DI) displays that the film is being wound.

When the photographer confirms that the film is loaded and closes the back cover, the switch (5WS) is closed, the output of the inverter (INs) becomes 'High', and the flip-flop (FFs) is already set. Therefore, the output of the AND circuit (ANs) becomes "High°'. At this rise, the one-shot circuit (OSZ> becomes “High”)
A pulse is output, and this pulse is OR circuit <OR,)
is applied to the flip-flop (FF7>) through the flip-flop (FF7> is set, and the Q output (MD
) becomes “Hilih”. The pulse from the output terminal (N'vV I ) of the OR circuit (ORt) is
+s) is output from the terminal (q) and the motor (M
The rotation of l) begins. On the other hand, flip-flop (F
Since the Q output (LHT) of F,) is “High”, the pulse from the terminal (q) is sent to the AND circuit (AN,
), the thyristor (SCR, ) in Fig. 3 becomes conductive, and the current flowing through the motor (M,) flows through the thyristor (SCR, ) without flowing through the resistor (R3).
, and the film is fed at high speed. Note that even if the terminal (1) becomes “Low”, the motor (Ml
) conduction of SCRI is maintained. Also, the Q output (MD
) goes high, even if the clip-flop (FF23) is reset by the signal from the terminal (PW, ), the output of the OR circuit (OR2i) goes high, and the display circuit (DI, ) goes high. This will indicate that the film is being skipped forward. Note that this display device (DI
, ) is a flip-flop (FF
23) is set, so the display continues.

Q output (MD) of flip-flop (FF?) is “H”
When it becomes "high", the transistor (BT+s) becomes conductive and the perforation detection section (33) and the signal type detection section (
35) ((31) surrounded by a broken line) is supplied with power.

The perforation detection section (33) outputs a pulse train due to the perforation of the film being transferred, and the signal type detection section (35) outputs a pulse train corresponding to the signal hole (SH) shown in Fig. 1. . Based on these two pulse trains, the reading circuit (37) reads various data on the film through the signal holes shown in FIG. Then, the pulse from the signal hole (EH) is output from the reading circuit (37) and the flip-flop (
FFs) are set and Q output (p) is “)Ihigh”
becomes. Note that the perforation detection section (33), signal hole detection section (35), and readout circuit (37) will be described in detail based on FIGS. 7 to 26. Of the data read by the reading circuit (37), the signal hole (
Data (FND) on the number of frames that can be photographed by CH) are displayed on the display device (DI3). Further, the film expiration date data (FDD) from the signal holes (YH) and (MH> shown in Fig. 1) is sent to the warning circuit (25) shown in Fig. 3 via the gate circuit (GA). , signal hole (
The film sensitivity data from the gate circuit (G
A) and a decoder (DE), it is converted into a code suitable for the camera and sent to the data selector (15) in the circuit (19) enclosed by the broken line in FIG.

If a film without a signal hole (SH) is installed, the signal hole (EH) is output from the reading circuit (37).
Since no pulse is output, the flip-flops (FFs) remain reset and the terminal (p) is “'L”.
Therefore, all outputs of the gate circuit (GA) are "0", and all outputs of the decoder (DE) are also "0". At this time, it is preferable that the display device (Dlff) displays that a film without a signal hole (SH) is loaded, instead of displaying the number of shots that can be taken with the film.

In the case of a film with a signal hole (SH), when the signal hole (IH) is detected, the terminal ■ of the reading circuit (37) becomes °'High'' and the gate of the AND circuit (AN+s) is opened. At the same time, the output of the inverter (IN+s) becomes "+■-o,I+" and the AND circuit (AN+
3) gate is closed. When the signal hole (EH) is detected, a pulse corresponding to the terminal ■ or t of the reading circuit (37) signal hole (El (>) is output and the flip
The flop (FFg) is set and the AND circuit (AND
) gate is opened. Then, the pulse train from the perforation detection section (33) is converted into a ternary counter (COs).
This counter (COs) outputs the third pulse. This pulse is generated by an AND circuit (AND
5) It is sent to the flip-flop (FFz) via the OR circuit (OR, , ) and the flip-flop (FFz
) is set. On the other hand, in the case of a film that does not have a signal hole (SH), the terminal
remains "Low'", the gate of the AND circuit (AND3) is opened, and the gate of the AND circuit (AN+s) is closed. Then, the perforation detection section (3
The signal from 3) is sent to a hexadecimal counter consisting of an octal counter (Co, ) and a binary counter (COo).
The 166th pulse is output from the binary counter (COz>) and sent to the flip-flop (FFz) via the AND circuit (AN13) and the OR circuit (OR11), and this flip-flop (F,,) is set. be done.

When the back cover is closed while the film is being fed at low speed, the switch <S'vV, ) is closed, the gate of the AND circuit (AN3) is closed, and the timer ('
The pulse (L W E 2) from r''It) is not output from the terminal (LWE, ) of the AND circuit (ANs).

Then, when a pulse is output from the timer ('r"It) and the flip-flops (FFs) are set, the gate of the AND circuit (ANS> is open in this case, so the AND circuit (ANs) The output is immediately “
High”, the one-shot circuit (O8z) outputs a “High” pulse, and the OR circuit (OR7
) to °'High°' pulses are also output. Therefore, in this case, when the low-speed feed for a certain period of time is completed,
Immediately shifts to high-speed empty feeding operation.

(PN) is a data output device that outputs data on the preset number of blank feed frames (preliminary feed frame number); (DIs
) is a display device that displays preset data. When loading a normal film that has not been photographed, the data output device (PN) outputs "00...0"°.
data is output and the output of the NOR circuit (No, ) becomes “Hi”.
Therefore, the flip-flop (F
When F++) is set, the AND circuit (AN16)
The output of becomes “High” and goes to the Funshot circuit (
The “)(high” pulse is output from the output terminal (FWE) of OS, S), and the OR circuit (OR33) (Figure 6)
is output from terminal (r) via
Furthermore, this pulse is the output terminal (
FL, +) is output to the flip-flop (FF+s
) is set, and the Q output (FF2) is “” Higl+
”. In the above manner, the first frame (F,) is rapidly fed to the position of the photographing angle of view.

When a partially photographed film is loaded, data for a larger number of frames than the number of already photographed frames is preset in the data output device (PN), and this data is output. At this time, the output of the NOR circuit (NO+) is "Low", the gate of the AND circuit (AN+a) is closed, and the output of the inverter (IN+7>) is "High", so the gate of the AND circuit (AN, □) is closed. The gate is opened, and the flip-flop (FF, ) is set and the AND circuit (AN
, ) is opened, the pulse train from the perforation detection section (33) is sent to the octal counter (Cot) via the AND circuit (AN, ), and the pulse train is sent to the octal counter (Cot) for every 8 perforations (one frame). pulses corresponding to the perforations are output, and these pulses are sent to the film counter (C
o,). The counter (CO?) outputs data (FCC) corresponding to the number of frames of the film wound by the blank feed, and this data (FCD) and data from the data output device (PN) of the preset number of frames are output. are compared by a comparator (COM), and when the two match, the output becomes "High" and the AND circuit (AN) is activated.

The output of the one-shot circuit (O3, ) becomes 'High.' This causes the output terminal (RWE) of the one-shot circuit (O3,,
igh” pulse is output and OR circuit (OR3:l)
(FIG. 6) and is output to the terminal (r) to stop the idle feeding. On the other hand, this pulse is output to the terminal (FL+) via the OR circuit (OR1,) and is output to the flip-flop (F
F+s) is set and the Q output (FL2) becomes “High.”
”. In the case of a film shot that has been shot halfway as described above, the frames that have not been shot are automatically skipped (preliminary feed) until they reach the position of the shooting angle of view. For example, this eliminates the hassle of having to put on a lens cap and advance the film while taking aerial shots over and over again, making it possible to create a camera that is extremely easy to load film with.

The operation when the number of blank feed frames (preliminary feed frame number) is erroneously preset to be greater than the number of recordable frames of the film will be explained. The output pulse (pcs) of the octal counter (Cog) is sent to the flip-flop (FF) via the OR circuit (OR+t).
, 7) to reset it, and also to the timer circuit (TTs) to start counting a certain period of time every time the pulse from the terminal (PC3) falls. In addition, at the time when this idle feeding is performed, the Q output (FL2) of the flip-flop (F F +s) is '
L.

-°, the pulse from the terminal (PC3) is not output from the AND circuit (AN+s). When the film is wound up to the final frame by idle feeding, the film is stretched, and the perforation detection section (33) no longer outputs a pulse signal due to the perforations. Therefore, even if a certain period of time elapses from the pulse output from the output terminal (PC3) of the counter (COt+) before the film is stretched, the next pulse will not be output from the terminal (PC3).

Therefore, the pulse from the timer (TIS) flips.
It is sent to the flop (FF17) and the flip-flop (
FF+t) is set and the Q output becomes I-fig11". On the other hand, at this time, the output of the comparator (COM) remains "Low", so the flip-flop (FF,
, ) remain reset, and the Q output is "High". Therefore, the output of the AND circuit (AN23) becomes "'High", and a "Higb" pulse is output from the output terminal (AWE) of the one-shot circuit (O821>), causing the OR circuit (OR3,) (Fig. 6). terminal (r
) and the hoisting operation stops. Furthermore, when the output of the AND circuit (AN23) becomes "'HiI?h", the warning device 1. (W A + ) is activated and a warning is given that an incorrect value has been preset.

Next, a normal winding operation will be explained. When the blank feed is completed, the flip-flop (FF1s) is set by a pulse from the output terminal (FLl) of the OR circuit (OR+3), and the Q output (FL2) becomes High''', and the operation of the exposure control mechanism is completed. When the switch (SWs) shown in Fig. 3 is closed, the terminal (f) becomes It Low, and the output of the inverter (IN13) becomes High, causing the one-shot circuit (O8, )) to ” pulse is output and the output terminal (NWI) of the OR circuit (OH2)
A pulse is output from. This signal is an OR circuit (OR1
s) and an AND circuit (ANs> (both shown in Fig. 6) from the terminals (q) and (1), and the motor (Ml
) rotates at high speed to charge the exposure control mechanism and wind the film. In addition, the flip-flop (FF7) is set by the pulse from the terminal (NWI), the transistor (BTI5) is made conductive, the perforation detection section (33) is operated, and the pulse train due to the perforation is connected to the AND circuit (A N I> The pulse from the 8th perforation is output from the terminal (pcs) and the film counter (CO7) counts up by one, corresponding to the output data of the counter (COl). Display device ff (D
I,). Furthermore, since the terminal (FL2) is 'High', the pulse from the terminal (pcs) is powered from the AND circuit (AN, , ), and the one-shot circuit (O5l:l )
A pulse is output from the output terminal (NWE) of the motor, and is output from the terminal (r) via the OR circuit (OR33)' (Fig. 6), thereby stopping the rotation of the motor (Ml). moreover,
The pulse from the terminal (NWE) is an OR circuit (0R3-) (
This signal is also output from the terminal (u) via the circuit (FIG. 6), and this signal is sent to the data imprinting circuit (21) shown in FIG. 3, and data imprinting is started based on this signal.

Next, the winding operation of the final piece will be explained. When the operation of the exposure control mechanism is completed and a pulse is output from the one-shot circuit (O813), the flip-flop (FF+s) is reset via the OR circuit (ORIs) and the Q output becomes "'High". Furthermore, the flip-flop (FF+s) is set by the signal from the terminal (FL, ), and the terminal (FL2) becomes "High, ++", and the gate of the AND circuit (AN2.) is opened.
The timer (TI3) starts counting a certain period of time at the rise of the pulse from the one-shot circuit (os'3.). When trying to wind the last frame, the film is stretched, and the counter (COs) does not output pulses due to the 8 perforations, and the timer (TI3) finishes counting for a fixed time and outputs a "High" pulse. Before outputting, the output terminal (pcs) of the counter (CO2)
No pulse is output from. Therefore, the AND circuit (AN
The pulse from the timer (TI3) is outputted from the output terminal (EWE) of 21>, and is outputted to the terminal (r) via the OR circuit (0R3) (FIG. 6) to stop winding. Furthermore, the pulse from the terminal (EW E ) is also output to the terminal (u) via the OR circuit (OR3,> (Figure 6''), and the data imprinting circuit (21) in Figure 3 is activated. Start.

Furthermore, the flip-flop (F F21) (Fig. 5) is set by the pulse from the terminal (RWE), and the Q output becomes "High", and the warning device (WA2) is activated, causing the film to reach the final frame. Warn that it has rolled up.

Furthermore, the timer circuit (TI7) operates with a pulse from the terminal (RWE) and starts counting a certain period of time.

This time is longer than the time required for data imprinting. Then, when the - fixed time count ends, the terminal (
NRW), a pulse of 'HiFIh' is output, the flip-flop (FF21) is reset, and the rewinding operation described later starts.In the case of this final frame, the shooting frame has not been completely wound up. Although the position where the data is imprinted is different from other screens, the data is imprinted reliably.

Thailand? (T I t) (7) Output terminal (NRW)
When a “Higb” pulse is output, a pulse is output from the output terminal (RWI) of the OR circuit (OR) (Figure 6), and the transistors (BTUs) become conductive via the diode (D7). , relay magnet (Mg
s) operates, the switch (SW17) is connected to the power supply, the motor (M,) starts rotating, the rewinding operation starts, and the transistor (BT,) is connected via the diode (D,).
A base current for maintaining conduction is supplied to the base of the transistor (Us) to maintain conduction of the transistor (BT). Furthermore, the flip-flop (FF31) is set by a pulse from the output terminal (RWI) of the OR circuit (OR31), and the gate of the AND circuit (Ar'Ls) is opened. The film is removed from the spool, the switch (SW7) (Fig. 5) is closed, and the terminal (j
) becomes “Lo-”, and the output (
FSS) becomes “High” and the one-shot circuit (O3
2, ) is outputted from the output terminal (RWE) of the AND circuit (AN29), the transistor (BT, , ) becomes conductive, and the transistor (B
T19) becomes non-conductive, the magnet (Mg5) becomes inactive, the switch (SW17) is connected to ground, the power supply to the motor (M,) and the transistor (B T + s) is stopped, and the rewinding operation starts. stops. As mentioned above, the pulse from the output terminal (RWI) of the OR circuit (OR31) is sent to the OR circuit (ORs) (Figure 5) and output from the terminal (PO2), and is used as a reset signal for many circuits. Become.

Next, the operation when manually closing the switch (SWl, ) (FIG. 6) and rewinding will be explained. Switch (SW
When Z) is closed, the terminal (1> becomes "'Lou+'°" and the inverter (■N1.) becomes "High". When this switch (SWI, ) is closed, the film is attached. If not, the switch (SW, ) is closed,
The terminal (FSS> becomes “High” and the inverter (I
Since the output of N21) is “Loud”, the AND circuit (AN
The output of 2S) remains "Low" and no rewinding operation is performed. When the film is attached and the switch (SWz> is closed, the output of the AND circuit (AN2S) becomes “Hi”.
gb”, and at this rise, the one-shot circuit (O
A high pulse is output from the flip-flop (FF2), and the Q output becomes "I-l".
-1i”.The output of the NOR circuit (NO5) (RWP+
), the output of the OR circuit (OR2:l) is “'High”
, while the flip-flop (FF2.) is set, and while the terminal (i) is High''', Lou
d" and the gate of the AND circuit (AN27) is closed. To explain the period during which the output of the NOR circuit (No. 5) becomes °'Low"° more closely related to the camera operation, it is a low-speed blank feed. During the time when high-speed dry feed starts (while the flip-flop (FF2.) is set), while the high-speed dry feed and normal winding and pulling are performed (
The exposure control operation is performed while the terminal (MD) is "High"), until the winding to the final frame is completed and the rewinding is completed (while the flip-flop (FF27) is set), and the exposure control operation is performed. (terminal (i) is °“High
Therefore, even if the flip-flop (FFzs) is set during this period, the AND circuit (
AN2,) does not become 'Higb°'.

If the flip-flop (FF29) is set in a case other than the above, the output of the AND circuit (AN2?) will be "'"
High°°, one-shot circuit (O827)
A ``High'' pulse is output from the output terminal (HRW) of , and the rewinding operation starts. The completion of rewinding is stopped when the film is removed from the spool and a pulse is output from the one-shot circuit (O82,) in the same way as normal rewinding.

Note that the flip-flops (FF, I) are OR circuits (O
Since it is reset by the falling signal of the pulse from the AND circuit (AN29), the pulse from the OR circuit (OR29) is reliably output from the output terminal (RWE) of the AND circuit (AN29).

Next, the release prohibition signal from the terminal (e) described in FIG. 4 will be explained. This is as shown in Figure 6.
While the output of the AO circuit (OR23) is "I-l-1i" and while the flip-flop (FF2S) is set, the output (e) of the NOR circuit (NOz) is "Low" and the release is disabled. This is not done.While the output of the OR circuit (OR2) is ')liFlh'', the film is loaded and until the high-speed empty feed (preliminary feed) is completed, and normal winding is performed. While I was there. On the other hand, while the flip-flop (FF2S) is set, the preset number of free-feeding frames is greater than the number of frames that can be shot on the film, and a "Higb" pulse is output from the terminal (AWE), causing rewinding. until the rewind is completed, or from the time the rewind is started manually until the rewind is completed.
Alternatively, it corresponds to the period from when rewinding automatically starts to when rewinding is completed.

Winding and rewinding are indicated by the display devices (DI7) and (DI9) in FIG. 6, but this display device is omitted and the reverse 7, 1 prevention diode ( If D:+) and (Ds) are made into light emitting diodes, the light emitting diode (D,) will light up when winding, and the light emitting diode (D9) will light up when rewinding, which can be used to display both winding and rewinding. .

FIG. 7 is a perspective view of the detection device of the perforation detection section (33) and signal type detection section (35) of FIG. 5.

Moreover, FIG. 8 is a plan view of the detection device seen from the crimp plate (49) side, and FIG.
FIG. (41) , (4
3) is the electrical contact that the brushes (59) and (61) come into contact with when there is a perforation (PH);
As shown in FIG. 9, the pitch is shifted by 1.5 pitches from the pitch of the perforations (PH). (5
1) is an electrical contact that the brush (61) comes into contact with when there is a signal hole (SH). These brushes (59) and (61) are fixed with a member (45) that is integrated with a leaf spring (47) to attach the crimp plate (49), and this member (45) is grounded. Therefore, the brushes (59) and (61) are also grounded. In FIG. 7, (53) is the screen frame of the camera, and (54) is the imprinting section of the data imprinting device ff (21) described in FIG. (55) is a sprocket, and (57) is a spool. As shown in FIGS. 8 and 9, each electrical contact (41), (43), (5
1) are connected to the power supply through respective resistors, and furthermore, inverters (IN25), (IN27), (IN
25) is also connected to the input terminal. Therefore, the brushes (59), (61) connect to the electrical contacts (41), (
43) and (51), the inverter (1N25)
), (TN2?), (IN2,) are respectively “High”
It is designed to output a detection signal of “.

Figure 10 shows a circuit that outputs a perforation signal and a signal hole signal based on the signals from the detection device shown in Figure 7.8.9, and a reading circuit that reads data from the signal hole based on the two signals. ((33) in Figure 5, (
35) and the reading circuit (corresponding to the reading circuit (37)).

Further, FIG. 11 is a time chart showing waveforms of various parts when reading the signal holes in the film shown in FIG. 1 using the circuit shown in FIG. 10.

The operation shown in FIG. 10 will be explained below based on the time chart shown in FIG. 11. When the transistor (BT+s) in Fig. 5 becomes conductive and power supply starts to the detection parts (33) and (35), the power-on reset circuit (PRY) operates and the flip-flop is activated via the OR circuit (OR3S). (F
F33) is reset. As the film moves, the inverters (T N25) and (I N2
7) outputs two detection signals that are shifted by a half pitch with respect to the pitch of the perforation (PH), as shown at lN23 and lN2t in FIG. Of these two signals, the signal from the inverter (IN27) is sent to the set terminal of the flip-flop (FF33).
IN2. ) is applied to the reset terminal.

Therefore, the flip-flop (FF33) is set by the rising signal of the inverter (IN27) and reset by the rising signal of the inverter (IN25). This waveform is shown in (FF3t) in Figure 11! do. The output waveform of this flip 70 tube (FF here) is used as a perforation signal, and the reason for this configuration is explained below.
If 1) were to use the signal that came into contact with the electrical contacts (41) and (43) as is, more pulses than necessary would be output due to chattering, etc., and two or more perforations would pass even though one perforation had passed. However, it is detected as if it had passed through.

Therefore, two inverters (I N25), (r N
27) rise signal causes flip-flop (FF:
If you use the signal that resets and sets l:l), even if the signals of inverters (IN25) and (IN2□) change after rising, the flip-flops (FF, 3
) is not affected, so one perf L・-
One pulse can be obtained reliably for each section. The signal from the flip-flop (F173, ) is output to the counter (C01), AND circuits (AN, ), and (ANs> shown in FIG. 5).

In addition, as described in FIGS. 5 and 6, the signal hole (El
) A pulse is output from the one-shot circuit (O3+s) using a signal based on the output of the flip-flop (FF11) that is set at the rising edge of the three-way perforation signal, and this signal stops the film advance and performs normal winding. Sometimes a one-shot circuit (○S1) is triggered at the falling edge of the 8th perforation signal.
The film advance is stopped by the pulse from (). Therefore, the film stops with the brushes (5) and the contact points (41) in contact with each other through the third perforation in the film feeding direction.

In Figure 10, the signal from the inverter (IH23) through the signal hole (IH) causes the flip-flop (FF3g
) is set and the terminal ■ becomes High”, and the gate of the AND circuit (AN+s) in Fig. 5 is opened.
The gate of the AND circuit (AN+3>) is closed, and the circuit enters a film feeding mode for film provided with signal holes and performs the above-described operation.

Flip-flop (FFzs) is an inverter (IH2
3) is set at the falling edge of the signal from
It is reset at the fall of the perforation signal from the flop (FF:13>) (FF, s in FIG. 11).

Then, based on the fall of the output of the NAND circuit (NAI), that is, the rise of the perforation signal from the flip-flop (FF3), the output of the flip-flop (FF) is sequentially taken into the shift register (SRI). The input data is shifted to the terminals (bag) to (b,). And signal hole (IH)
When the signal from the last hole of the signal hole (MH) is shifted to the terminal (bo), that is, when the signal from the last hole of the signal hole (MH) is taken into the terminal (b+6), the output of the inverter (IH2,) becomes 'Loud', The output of the NAND circuit (NA, ) is independent of the output of the flip-flop (FF33).
It remains High"" and the shift register (SR,)
The terminals (bo) to (bus) have signal holes (IH) to (M
The shift operation stops in a state in which the signal from H) is captured. Therefore, the terminals (b,
) to (b, i) are the data “1010101001101001° corresponding to the signal hole of the film in Figure 1.
° (Fig. 11 S, ~ b, 6), and this signal remains until the reset signal (PO2) (film rewind start signal) from the OR circuit (0, R5) in Fig. 5 is input to the reset terminal. is retained. And the terminal (bo) is “High”
l+°", the gate of the AND circuit (AN31) is opened, and the inverter (IH23) is opened by the signal hole (EH).
) is the output terminal of the AND circuit (AN31) ■
(FF1. in Figure 11), the flip-flop (FF9) in Figure 5 is set by the pulse from this terminal ■, and the 3 from the flip-flop (FFz: +)
At the falling edge of the perforation signal, the flip-flop (FF1.) in FIG. 5 is set (FF, l in FIG. 11), and the movement of the film is stopped.

FIG. 12 is a plan view of a certain type of film.

In the case of this film, the perforations (
A small hole (TH) for film identification is provided between the perforations every PH>4. Therefore, when such a film is inserted into a camera that uses the perforation detection device shown in Figs. 7 to 10, the above-mentioned small hole (TH) will be mistakenly recognized as a perforation, and an erroneous perforation signal will be output. This causes the problem that film feeding is not performed accurately.

FIG. 13 shows a circuit in which the signal from the hole (TH) in FIG. 12 is disabled and only the signal from the perforation thin (PH) is output, and FIG. 14 is a time chart of this circuit.

In Fig. 9, since the film is moved to the right, the pulse from the hole (TI-[) is first applied to the inverter (IN2S).
), and is output from the inverter (1N27) with a delay of 1.5 cycles relative to one cycle of perforation. The AND circuit (ANff:+) is connected to the inverter (IN2
? ) and a signal obtained by inverting the output of the inverter (IN2.) with the inverter (rN, s>), so
When the pulse from the hole (TH) is output from the inverter (IN25), the inverter (IN2?) becomes “High”.
A signal that becomes "Low" is output in the middle while the signal becomes "L+" (FIG. 14, AN13). Similarly, the AND circuit (
From AN, 5), when the pulse from the hole (TH) is output from the inverter (IN27), the inverter (I
In the middle while N2',) is "High", "
A signal that becomes “Low” is output (Fig. 14 AN1.)
. Then, the flip-flop (FF3?) is set at the rising edge of the AND circuit (AN: +t), and the OR circuit (O
R1,) is reset at the rising edge of the AND circuit (AN35) (FIG. 14, F F37).

Therefore, the output of the flip-flop (FF37) is the hole (
This becomes a perforation signal that is not affected by TO.

FIG. 15 is a perspective view of another embodiment of the perforation detection device, and FIG. 16 is a sectional view of this device attached to a camera. In Figure 15, (63), (67
) are photocouplers with built-in light emitting diodes (LE+), (LE, ) and photodiodes (PD, ), (PD,), respectively, and these are perforated (P
It is shifted by 1/2 period from the − period of H), and the photodetector (PD, ) is 1/2 period earlier than the hole (TH).
is arranged to detect. (65) , (69
) is a mask for increasing perforation (PH) detection accuracy, and its function will be described later based on FIGS. 21 to 26.

In FIG. 16, (47) is a crimping temporary presser spring, (49)
) is the crimp plate, (83) is the inner cover, and the photocoupler (
63), the light emitting diode (LEl) in (67),
The light emitted by (LE3) passes through the perforation (PH) and is reflected by the film side of the inner lid to form a photodiode (PD).

1), the part (87) is a diffused reflection part so as not to be incident on (PD2). (85) is a back cover, (81) is a guide roller, and (57) is a spool with a built-in winding motor (M,). (71) is the camera body, (73) is the shutter unit, (75) is the front frame, (
77) is a lens mount, and (79) is a mirror box.

In this case, the perforation (PH) is detected by a photocoupler and the film is wound by a spool, so there is no need for a sprocket to detect the amount of film feed or to feed the film.
No sprocket is provided. Therefore, am related to the sprocket is omitted, making it possible to reduce the weight and size.

Figure 17 shows the configuration of Figure 12 using the configurations of Figures 15 and 16.
This is a circuit that outputs a perforation signal that is not affected by the holes (TH) in the film shown in the figure, and FIG. 18 is a time chart of the output of this circuit. The light emitting diode (LE, ), (LE3) is a constant current source (CIO), (
Since it is driven by CI3), it emits light with a constant intensity. Then, there is a photometric circuit consisting of a photodetector (PDI), a feedback resistor (R1), an operational amplifier (OA,), a photodetector (PD3), a feedback resistor (R1), and an operational amplifier (OAz).
The outputs of the photometric circuits configured as shown in Fig. 18 (
OAl), < 0A3). When there is a perforation (PH), there is almost no light reflected by the film, and as the film moves, the output gradually decreases and then increases. Also, when there is a hole (TH), this hole (TH) is smaller than the perforation (PH), so the hole (TH) is located at the position where the output of the photometric circuit becomes minimum.
Even when TH) is present, there is a considerable amount of light reflected by the film surface around the hole (TH), resulting in a much larger value than the output from the perforation (PH).

<Act) is an analog converter, which compares the outputs of the two photometric circuits. Therefore, the operational amplifier (
When the output of OAl) decreases due to perforation (PH), even if a hole (TH) appears at the detection position of the photocoupler (67) and the output of the operational amplifier (oA*) decreases, the decreased value is due to perforation (PH). )', the output of the comparator (AC+) becomes "Low". Similarly, the photocoupler (67) has a perforation (PI-(
), the photocoupler (63) detects the hole (
Even if TH) is detected, the operational amplifier (OAI>, (OA3)
The output becomes OAI>01 and the comparator (Act)
The output of is 'High'°.Therefore, a perforation signal not affected by the hole (TH) is obtained.

FIG. 19 shows another example of a circuit for outputting a perforation signal that is not affected by holes (TH).

Comparators (AC3) and (AC5) are constant current (CI
s) and resistor (R6) and operational amplifier (OAI).
> , (0A3) outputs are compared and each comparator (
AC3), (from AC5>, see Figure 20 AC3, AC
A waveform shown in s is output.

These two outputs are input to the OR circuit (OR41), and while the signal from the perforation by the comparator (AC3) is 'Higl+°', even if the comparator (AC9) becomes "l H; gh++" due to the hole (TH). From the OR circuit (OR11) is the comparator (AC3)
Similarly, even if a pulse due to the hole (TH) is output from the comparator (ACz) when a signal due to the perforation is output from the comparator (ACs), the OR circuit (OR4, ) is output as is. The perforated signal from the comparator (AC3) is output as is (OR, . . . in FIG. 20). Therefore, the OR circuit (OR, ,
) outputs a perforation signal at a period that is 1/2 of the perforation period.

The output of this OR circuit (OR41) is input to the T terminal of the T-flip/flow control TF, and a signal whose frequency is divided into 1/2 is output from the Q output (Fig. 20 AC3).
, if this signal is used as a perforation signal, it will not be affected by the signal hole.

Next, the functions of the masks (65) and (69) shown in FIG. 15 will be explained based on FIGS. 21 to 26. First, functions related to specular reflection will be explained based on FIGS. 21 to 25. Figures 21, 22, and 23 show the distance between the photocoupler (PC) and the flaper (RF).
The luminous flux from the light emitting diode (LE) when changing the
This figure shows how the light enters after being specularly reflected by the light.

In addition, Fig. 25 shows the photodetector (PD) when the distance d between the beam lefter (RF) and the photocoupler (PC) is changed.
) is a characteristic curve showing the output of The horizontal axis is the distance d between the photocoupler (PC) and the lefter (RF), and the vertical axis is the constant current (for example, 10+aA) in the light emitting diode (LE).
This is the relative value of the output of the photodiode (PD) when .

First, the solid line in FIG. 25 will be explained. This solid line is
First diode (PD) without mask (M)
This shows the output characteristics of In this case, long distance (d=
8 +n+n), as the distance Hd becomes shorter, each point on the photodiode (j'D) becomes a light emitting diode (LE
) The amount of light received increases as the angle at which the object is viewed increases. Then, when the output reaches its peak at the distance plidl and approaches any further, the angle relative to each point on the photodiode (PD) is limited by the barrier (α) as shown in FIG. The output of the photodiode (PD) decreases rapidly (dashed line and dashed-dotted line).

Therefore, perforations (
PH), when there is a film, the distance Na
+, and when there is a perforation, the reflected light from a reflective surface at a distance of Nd3 is received, then the output when detecting a perforation is:
The output is about 62% of the output when there is film, and there is a problem in that the detection accuracy is poor.

The broken line in FIG. 25 shows the output characteristics when a mask (M) is provided so as to increase the difference in the output of the photodiode (PD) when the distance is different, in order to solve the above-mentioned problem. In the case of Fig. 21, the photodiode (P
Each point on D) is not obstructed by the mask (M> and the barrier (α)) and is directed toward the entire light emitting diode (LE) (solid line and dotted line, and solid line and dashed-dotted line), and the distance at which this viewing angle is maximum is determined. 1IId+ and the photodiode (PD
) has the maximum output. In addition, FIG. 22 shows the distance Pi d 2
is d.

In this case, regardless of the presence or absence of the mask (M), the angle at which the point on the photodiode (PD) looks at the light emitting diode (LE) is reduced by the barrier (a), as shown in Fig. 25. It has the same characteristics as the solid line.

Figure 23 shows the photocoupler (PC) and reflector (R
It is a figure when distance d3 of F) becomes larger than dl. In this case, the distance between the points on the photodiode (PD) becomes longer, which reduces the angle at which the entire light emitting diode (LE) is viewed, and the light rays are eclipsed by the mask (M), resulting in a solid line, a solid line, and a - point. As shown by the chain line and the dashed-dot line, the number of points that do not cover the entire light emitting diode (LE) increases, and the fall becomes more rapid than in the case of the solid line (when there is no mask (M)). Therefore, if we set the distance between the photocoupler (pc) and the film as dl, and the distance between the reflection surface of the light beam that has passed through the perforation as d, the output of the photodiode (PD) when the perforation is detected will be the same as when the film is detected. This is approximately 46% of the output when the mask (M) is present, and the detection capability is increased by 1 compared to the case without the mask (M).

The dashed line in FIG. 25 is a characteristic curve when the optical system shown in FIG. 24 is used. In this Figure 24, the photodiode (
The end face (M) of the mask (M) is lower than the point (PDa) on the
b) is located closer to the barrier (α), and the end face (Ma) of the mask (M) is located closer to the barrier (α) than LEa) lit on the light emitting diode (LE). With this configuration, the amount of light rays excluded is larger than that of the mask (M) shown in FIG. 23, and the fall of the characteristic curve becomes steeper.
The output ratio of D) is 100:34. Further, as shown by the broken line in FIG. 24, when the distance to the reflecting surface (RF') becomes 84 or more, reflected light from the light emitting diode (LE) no longer enters the photodiode (PD). Therefore,
If the reflective surface of the light that has passed through the perforation is separated by a distance d, the output of the photodiode (PD) will be O when detecting the perforation, and the detection ability will be further improved.

Although specular reflection has been explained in FIGS. 21 to 25, there is usually a considerable amount of light reflected by diffuse reflection on a reflecting surface. Therefore, in Fig. 26, the effect of the mask (M>) on this diffuse reflection will be explained. Fig. 26 is a diagram when the perforation (PH) of the film (F) comes to the detection position. Most of the rays that passed through the perforation (PH)
) by the diffused reflection surface (87) of the photodiode (PD
), and furthermore, specularly reflected light rays almost never enter the photodiode (PD) as described above. On the other hand, among the light rays emitted from the light emitting diode (LE) No. point (LE6) and incident on the film surface (Fa), the specular reflection component shown by the solid line is definitely reflected by the photodiode (
PD), but there is a considerable amount of diffuse reflection components shown by broken lines.

As is clear from the figure, most of these components are cut by the mask (M>. Therefore, the mask (M
) not only improves the signal-to-noise ratio of reflected light due to specular reflection, but also has the function of cutting off excess diffusely reflected light, so it is highly effective in improving perforation (PH) detection ability.

FIG. 27 shows a specific example of the data imprinting circuit (21), clock circuit (23), and expiration warning circuit (25) shown in FIG. (91) is a crystal oscillator, (1)3) is an oscillator,
(95) is a frequency divider, 2048 +-12,128H7
,,321-1z, 21■z, IHz clock pulses are output. (97) is a clock circuit that measures the year, month, day, hour, minute, and second based on the IHz clock pulse from the frequency divider (95). In addition, in Fig. 3, the frequency division is 3 (95)
The various clock pulses from the clock circuit (97) are collectively indicated by the symbol (TP), and the imprint data from the clock circuit (97) are collectively indicated by the symbol (TD).

Data (TD) and 128Hz clock pulses from the clock circuit (97) are input to dynamic display circuits (nine), and the data imprinted on the liquid crystal is dynamically displayed. When the switch (SW2.) is closed, the transistor (BT21) is repeatedly turned on and off based on the 2048Hz clock pulse, and the transformer (T
A high voltage clock pulse (2048Hz) is applied to both end electrodes of the EL panel (ELF) by R,).
The L panel (ELI) emits light and becomes the backlight light source for the dynamic liquid crystal display.With such EL panel illumination, since the light source is flat, it can be placed overlapping the liquid crystal display, and the lamp illumination There is no need for an optical system like that, there is no uneven lighting, and there is a soft visual effect.Furthermore, compared to lamp lighting, it is useful for products such as cameras that need to be small and lightweight. It has a great effect.

(101) is a display circuit that statically displays data from the clock circuit (97) on a liquid crystal, and a transistor (B
T2. ) is conductive when the switch (SWls) is closed in the data imprinting mode while the imprinting time control circuit (103) surrounded by a broken line outputs a “High”° signal, and the lamp ( A constant current source (CI7
) to cause the lamp (LA) to emit light at a constant intensity.

Then, the display data of the static display circuit (101) is imprinted onto the film by the light emission of this lamp (LA). Note that an EL panel may be used for imprinting and as a light source.

Next, the imprint time control circuit (103) surrounded by a broken line
Explain the operation. An analog signal of the apex value of the film sensitivity from the DA converter (17) shown in FIG. 3 is inputted from the terminal (a). This circuit (103) is a switch (
When power supply starts by closing SW+s), the power-on reset circuit (PR,) operates and the OR circuit (O
The flip-flop (FF39) is reset via R, 3), and the transistor (BT, , ) becomes conductive.
Transistors (BT20), (BT23), (B
T2S), (BT2?), and (BT2S) are out of conduction.

When a pulse is input to the terminal (u) from the OR circuit <0R34) in Figure 6, the fall of this pulse causes the flip-flop (FF3 to be set and the transistor (BT2゜) , (BT2
3) , (BT2S) , (BTzt), (BT2%)
becomes conductive, the transistor (BT31) becomes non-conductive, data imprinting starts, and counting of imprinting time also starts. The apex value Sv of the film sensitivity from the terminal (a) is input to the subtraction circuit (105) to a constant voltage caused by the resistor (R9) and the constant current source (CI), and a voltage of -8V is output, and this voltage is The transistor (BT29) converts the current into 2/2 ■, and this current is integrated by the capacitor (CO).When this integrated voltage output is lower than the output of the constant current source (CIz) and the resistor (R9), the comparator The output of (AC?) becomes "High" and the flip-flop (FF39) is reset via the OR circuit (OR43) and the imprinting operation is stopped.Therefore, the imprinting time is inversely proportional to the film sensitivity. controlled by the time.

Next, the film expiration warning circuit will be explained. Among the data (TD) from the clock circuit (97), the year and month data and the year and month data (FDD) read from the film output through the gate circuit (GA) in Figure 5.
is input to the magnitude comparison circuit (107), and the output of this magnitude comparison circuit (107) becomes "High" if the data (TD) from the clock circuit (97) is greater than the film expiration date data (FDD). , if it is small, “Low”
becomes. A specific example of this magnitude comparison circuit (107) is shown in the 29th
This will be described later based on FIGS.

After the reading of the signal hole (S) is completed, the flip-flop (FF) shown in Fig. 5 is set and the output (p) becomes “H”.
When it becomes "high", the gate of the AND circuit (ANzs) is opened.Then, the output of the magnitude comparison circuit (107) becomes "'
When it goes High, the output of the AND circuit (ANo) becomes “High”.
becomes High.The AND circuit (Funshot circuit <0931) is triggered by the rising edge of the output of AN3, outputting a “High” pulse, and the flip-flop (FF41) is set at the falling edge of that pulse. This opens the gate of the AND circuit (AN3?), and the 2048Hz clock pulse from the frequency divider (95) is output from the AND circuit (AN37). Transistors (BT 33), (BT 39) at the frequency of the clock pulse
The piezoelectric element (109) alternately becomes conductive and non-conductive, and as a result, a warning sound is generated from the piezoelectric element (109), warning the photographer that the expiration date of the film has expired.

When the flip-flop (FF4.) is set, the gate of the AND circuit (AN4+) is opened and the frequency divider (9.
The 32H2 clock pulse from 5) is applied to the AND circuit (
is input to the counter (Co,) via AN41>, m
The 1st clock pulse is output from the carry terminal and passes through the OR circuit (oRks) to the flip-flop (FF4).
1) is reset and the AND circuit (AN37), (A
The gate of N41) is closed and the generation of the warning sound is stopped, and the counter (COs) stops moving.

Therefore, the warning sound is generated for a certain period of time after the reading of the film data is completed.

FIG. 28 is a modification of FIG. 27. Switch (SW3
1> is a switch that is closed in conjunction with the photometric switch (SW, ) shown in FIG. When this switch (SW, l) is opened, the output of the inverter (IN36) becomes "'H".
This results in an AND circuit (AN, .).
gate is opened, and at this time, if the validity period has expired and the output of the AND circuit (AN39) is "High", the output of the AND circuit (AN 4°) is °'High.
When the output of the AND circuit (AN+o) rises, the one-shot circuit (O832) is triggered and the OR circuit (
A flip-flop (FF, , ) is set via OR4o) to generate a warning sound for a certain period of time. In the case of this embodiment and the modified example, a warning can be issued even if the photographer leaves the film attached to the camera for a long time and the expiration date of the film has expired. In addition, in this example and the modified example, the output of the clock circuit and the read expiry date data are compared, but the imprinted data is of a type that is set manually, and the setting data and the read expiry date data are compared. You may also do so.

Next, based on Fig. 29 and Fig. 30, a size comparison circuit (
A specific example of 107) will be explained. Table 1 shows an example of a code for expiration date data. To explain the code corresponding to the outputs of terminals (b8) to (b16) of the shift register (SRI) in Fig. 10, when (b,) is 1, 1990
When (b8) is 0, it is the 1980s, (b9) ~
(b, □) are binary codes corresponding to years 0 to 9,
(b,,) to (b+8) are binary codes corresponding to January to December. In the case of the film shown in Figure 1,
Terminals (1)s) to (b, 6) are "00110100
1” and the expiration date is September 1986.

Then, if the year and month data of the data (TD) from the clock circuit (97) is decoded by the decoder (DEI) and the data is "010000011", which is March 1988, that is, the expiration date has expired. The operation in this case will be explained.

When the terminal (ρ) completes reading and goes high, the one-shot circuit (O8z3) becomes “'Hi) (b’”).
A pulse of 204 is output and the frequency is divided by iM (9s).
At the falling edge of the 8Hz clock pulse, the output of the one-shot circuit (O333) becomes the D-flip-flop (DPI).
), and an AND signal of this output and a 2048 Hz clock pulse is output from the AND circuit (AN, l). At the rising edge of this pulse, the shift register (5R3
), (5Rs) contains year and month data (T,) to (To) and expiration date data (b8) from the decoder (DE, ).
~(ba+,) are taken in by terminals (I,) ~(11), respectively.

Also, Kara79<CO++) is an OR circuit (OR49)
is reset via . Furthermore, an AND circuit (AN4.
), the flip-flop (FF
,,) is set, flip-flop (FF4s)
are reset to 1 through the OR circuit (ORs+). When the clip flop (FF43) is set, the gate of the AND circuit (A N 45) is opened and the frequency is 2048Hz.
The clock pulse of the shift register (SR:l), (5
Rs) and is input to the counter (COz). Then, the shift registers (SR3) and (5Rs) synchronize the preset data in parallel with the clock pulse and sequentially output the SO
Output from the terminal (5e-real 0output).

Exclusive OR circuit (EOI), AND circuit <
A N 47), (AN,,), Inverter (IN
l,) is two S.

It constitutes a circuit that determines the magnitude of 1-bit data output from the terminal. Since the output of To, b+s is 1, the output of (EOI) becomes “LO-”, and then T I=
1, when b+s=O, the gate of the AND circuit (AN4?) is opened and a clock pulse is output (Fig. 30 03).
3S), the flip-flop (FF, s) is set. Next, at T')=O, b+i=1, a pulse is output from the AND circuit (A N 4B) and the flip
The flop ('F F 45) is reset.

T5=0,b,,=1,T,=Olb,. =1, a pulse is output from the AND circuit (A N 49), but the flip-flop (FF=s) remains reset. And T 7= 1, ++
When 9=O, the flip-flop (FF45) is again set by a pulse from the AND circuit (AN47).

Therefore, if the data (TD) is larger, the flip-flop (FF, 5) is set, and if it is smaller, it is reset (FF4S in FIG. 30). And the counter (
COz) outputs the 9th panel from the carry terminal and goes through the OR circuit (OR47) to flip-flop (
FF43) is reset and the gate of the AND circuit (AN4S) is closed. Also, the one-shot circuit (O3
3S) is triggered and a pulse is output.
3S), the flip-flop (
The Q output of FF, 5) is a D-flip-flop (DF,
), and the AND circuit (AN39) (Fig. 27) outputs a ``High'' signal (Fig. 30D).
F.). Note that D-flip-flop (DPI>, (
DF3), the flip-flop (FF<i), and the counter (COz) receive the pulse from the power-on reset circuit (PRl) (Fig. 27) or the OR circuit (Fig. 5) via the OR circuit (OR46). It is reset by a reset pulse (PO2) output from OR5). In the manner described above, signals corresponding to the magnitudes of the two data (TD) and (FDD) are output.

FIG. 31 shows a specific circuit example of the film sensitivity display device (27) of FIG. 3. (127) is a data circuit that outputs data corresponding to ASAloo, (129) is ASA4
This is a data output circuit that outputs data corresponding to 00. Then, the data (FSD) read from the data selector (15) in FIG. 3 or the data set by the setting device (13) and the data output circuits (127), (129
) to the comparison circuit + (E○, ) ~ (EOll
) and (ORss) and (EOI*) ~ (EO21>tokuORs+)l, and the data selector (1
5) When the film sensitivity from ASAloo is not 400, the output of the OR circuit (OR63) is °' High.
"become.

When the output of the OR circuit (ORas) is “High”, the output of the NAND circuit (NA, ) is the frequency divider (9
5) and 20 clock pulses of opposite phase to the 2Hz clock pulse are output. When the output of this NAND circuit (NA3) is “High”, the data from the data selector (15) is output from the data selector (133), and “
When the display circuit (135) is blank (does not display anything), the data output circuit (13
Blank data from 1) is output. Therefore, the data from the data selector (15) is ASAloo, 40
When the value is not 0, the film sensitivity value is displayed blinking at a frequency of 2 Hz in the liquid crystal dynamic display circuit (135) to which a 128 Hz clock pulse is input. On the other hand, when the output of the OR circuit (OR63) is "Low", that is, the data from the data selector (15) is
o or 400, the output of the NAND circuit (NA3) is always “Highll” and the data selector (133)
The data from the data selector (15) is always output from the display circuit (135).
0 is always displayed.

The switch (SV40) is a liquid crystal dynamic display circuit (
135) is a lighting switch for the display section. When the output of the NAND circuit (NA3) is “High”, that is,
When the set or read film sensitivity is Δ5A100 or 400, the gate of the AND circuit (AN55) is opened, a 2048Hz clock pulse is constantly output, the EL panel (EL3) is always lit, and the display section is On the other hand, when a 2Hz clock pulse is output from the NAND circuit (NA3), the E and L panels (
EL3) blinks in the same phase as the blinking of the display section of the dynamic display circuit (135), and lights up to illuminate only when numbers are displayed.

As described above, in this display device, if the film speed is commonly used (ASAloo, 400), the number will be displayed as is, and if the film speed is not usually used, the film speed value will be displayed blinking as a number. Ru.

Therefore, in the case of a film sensitivity that is not often used, this will serve as a warning that photography will be performed at a special film sensitivity value.

FIG. 32 shows a specific example of the display section for the number of shots of film.

(DEs) is a decoder that transforms into a binary code corresponding to the number of shots of the film based on signals from terminals (bi) and (by) of the shift register (SRI) shown in FIG. Table 2 shows an example of the input/output relationship of the decoder (DE).

When the reading is completed and the terminal (p) becomes "High", the 6-bit data from the decoder (DEs) is preset in the down counter (COI3) at the rising edge of this signal. Then, each time the film is advanced one frame, the terminal (pc
s), the down counter (CO
The contents of I) are subtracted by one. Therefore, the counter (C
The contents of 0, 3) are data corresponding to the remaining number of shots. The decoder (DE?) is a counter (COI: l
) output is “000101°°～”o o o o o
o", that is, when the remaining number of shots is between 5 and 0, a "High" signal is output.

(143) is a data selector, which is a NAND circuit (NA
When the output of s) is "High", the data (FCD) from the film counter (COt) shown in Fig. 5 is output, and when the output of the NAND circuit (NA s) is "Low", the data for blank display is output. A data output circuit (1
41). Therefore, when the terminal (p> is "High" and the number of remaining shots is 5 or less and the output of the AND circuit (ANS?) becomes 'High', the NAND circuit (NAs) outputs a clock with a frequency of 2Hz. The pulse is output and the display device (D I +) flashes the number of shots.On the other hand, the AND circuit (AN5
? ) is a NAND circuit (NAs) when the output is “Low”
Since the output of the data selector (1
43) constantly outputs data (FCD) on the number of shots of the film, and the display device (DI, ) displays the number of shots as is.

As described above, in this embodiment, when the number of remaining shots falls below a predetermined value, the numerical value of the number of shots is displayed blinking to warn that the remaining number of shots is small.

(AH), (CH), (YH), shown in Figure 1
It is conceivable to provide a signal hole indicating film type data in addition to the (MH) data. The type of film is A type (tungsten type, color temperature 340).
0K), B type (tungsten type, color temperature 320
0K), D type (daylight type, color temperature 550
0K). Therefore, a case will be explained in which data is set to "10" for type A, "01" for type B, and "00°" for type D.

Type A and type B are usually used indoors, but when indoors, it is possible to mistakenly take pictures using a strobe. By the way, the strobe light source has a color temperature matching that of D-type film, so it can be used with A-type or B-type film.
If you use flash photography with this type of film, the colors on the film will be very unnatural. The circuit shown in FIG. 33 addresses this problem.

First, the signal hole increases by 2 bits, so the shift register in Figure 10 has two additional terminals, terminals (b17) and (b18).
From the terminals (b17) and (bl,), the A type is “°1”.
0", "01" for the B type, and "00゛ for the D type. Therefore, the output of the exclusive OR circuit (EO3+) is a tungsten type (“1
0", "01"), it becomes "High", and when it is a daylight type ("OO"), it becomes "°"L ou+"".

In FIG. 33, (137) is a strobe power supply circuit;
(Xe) is a xenon tube, (139) is a trigger circuit, (
CM) is the main capacitor. (Ne) is a neon tube,
When the charging voltage of the main capacitor (CM) reaches a predetermined value, a current flows and a charging completion signal is sent from the resistor (R31) to the terminal (
J32) and (J31>) are input to the camera side. Note that the terminals (J21) and (J22) are
A terminal that transmits the contact (S×) signal to the strobe side, a terminal (
J, , ) and (Jl□) are terminals that connect the camera side and strobe side to a common ground.

When reading is completed, terminal (p) becomes 'High',
Exclusive or times when tungsten type film is installed? The output of 8 (EOi+) is '1-1-1
i" and a charging completion signal is input from the terminal (, Ll), the output of the AND circuit (AN6.) becomes "'H.
"high" and the output of the inverter (IN39) becomes "L".
When the switch (SW: +,), which opens and closes in the same phase in conjunction with the photometric switch (SW, ) in Figure 3, is closed, the output of the inverter (TN41) becomes "High". , the gate of the AND circuit < AN a5) is opened, a 2Hz clock pulse is output from the AND circuit (ANss), and the light emitting diode (LET) is activated via the OR circuit (OR=s) and the transistor (BT4%). It flashes to warn you that a tungsten type film is attached while flash photography is in progress.The transistor (BTl3) is the same as the transistor (BT
Since conduction/non-conduction is controlled in the same phase as 1), the inverter (IN4
The output of 1) remains as "')(igl+").

When a D type film is installed, the output of the exclusive OR circuit (EO31) becomes “Low” and the output of the inverter (IN39) becomes “ll1g1+”.
”. Therefore, the terminal (, l31) becomes 'High'.
When the charging completion signal is input, the AND circuit (ANss)
The output of becomes “'High”. Then, switch (S
When Wzs> is closed, the output of the AND circuit (AN6.) becomes “High” and the OR circuit (ORas)
A light emitting diode (LE) is connected via a transistor (BT4S).
7) lights up to indicate that charging is complete.

Therefore, in the embodiment of FIG. 33, the tungsten type (
When a charge completion signal is input from the strobe when a type A or B type film is loaded, the light emitting diode (LEy) flashes as a warning, and a daylight type (D type) film is loaded. When a charging completion signal is input, the light emitting diode (LEy) lights up.

FIG. 34 is an example of a film type warning pond.

When the reading is completed and the terminal (p) becomes "High", the liquid crystal display section (143) displays the data of A, A, and A, based on the film type data from the terminals (bat) and (baa).
One character of B is displayed.

In addition, in the case of the tungsten type, the output of the exclusive OR circuit (EO31) becomes "High", the switch (SW33) is closed, and the inverter (IN41)
) becomes “High”, the AND circuit (ANSt
) becomes “'High”. As a result, the AND circuit (ANai) outputs 2048H2 and 2Hz clock pulses, and the inverter (IN43)
, ) transistor (BT4t), (B'r), a Zener diode (ZD3), and a piezoelectric element (145) output a warning sound with a frequency of 2Hz. Therefore, in this example, The type of film loaded (A, B, D) is displayed on the display device, and
For tungsten types (A, B), a warning sound is generated in conjunction with the closing of the photometric switch. Note that the switch (
SW35) is a switch that is manually opened when a warning sound is not required.

As a modification of FIGS. 33 and 34, a light receiving element for measuring the color temperature of the light source may be provided to measure the color temperature, and a warning may be issued if the measured value and the read film type data do not match. Alternatively, a compatible filter may be automatically inserted into the optical path system.

As shown in FIG. 1, film data is provided at the leading end of the film, and after this data is read, the portion of the film where the signal hole indicating the data is provided is wound onto a spool. Therefore, it is necessary to store the read data.

Therefore, as shown in FIG. 3, the data reading shift register (SR,) shown in FIG.
Power is always supplied from the E+). but,
In this case, there is a problem that if the battery (E,) is replaced with the film attached, the data stored in the shift register (SR,) will be lost. 35th
The figure shows an embodiment that solves these problems.

In FIG. 35, (9) is the block (
9), and a shift register (SR+) (FIG. 10) for reading and storing data is provided inside. (
151) is a block diagram showing circuits other than block (9) in FIG. When the power battery (E,) is installed, the switch (S) is activated in conjunction with the installation of this battery (El).
Wss) is closed and the switch (SW3?) is opened. Therefore, the block (151) has a switch (SW: +
s), and the block (9) has a power supply battery (
E+). (CS) is a backup capacitor, which is charged from the battery (El) via a diode (D21). When the battery (El) is removed, the switch (SW, s) is opened and the switch (SW37) is closed. As a result, power is supplied to the block (9) from the backup capacitor (CS) via the switch (SW5.). On the other hand, since the block (151) includes a diode (D23), power is not supplied from the capacitor (CS), and excess current consumption can be prevented.

Therefore, after removing the battery, power is supplied to the block <9) by the capacitor (C8), so the data stored in the shift register (SR+) is transferred to the capacitor (C8).
If you replace the battery before the charge in the CS) is consumed, it will never run out.

FIG. 36 shows a modification of the part related to film attachment shown in FIGS. 5 and 6. In the embodiment shown in FIGS. 5 and 6, winding is performed at low speed for a certain period of time, and when the camera back is closed during winding at low speed, winding at low speed is continued.
As soon as the low speed winding was finished, the high speed winding started. In this modification, a fixed amount of low-speed winding is performed, and as soon as the back cover is closed during low-speed winding, high-speed winding is started.

When the film is installed, the output of the inverter (IN,) goes 'High' - the output circuit (O8,)
A “High” pulse is output from. The flip-flop is set at the rising edge of this pulse, and the one-shot circuit (O3z) is triggered at the falling edge of this pulse to output a "Higb" pulse. This pulse is passed through an OR circuit (OR?). Output from terminal (q), film winding starts, flip-flop (F
F? ) is set, transistors (BTUs) conduct and power supply to the circuit (31) begins. At this time,
The Q output of the flip-flop (FF3) is “Lou+°
° Therefore, the gate of the AND circuit (AND) is closed and the pulse output to terminal (q) is not output to terminal (1), and the thyristor (SCR, ) in Figure 3 is not conductive, so it is not possible to operate at low speed. Winding is performed. As the film moves, the perforation-induced pulses output from the perforation detection circuit (33) are transmitted to the AND circuit (
It is input to the counter (Coo) via AN12).

And - counting constant perforations,
A “High” pulse is output from the counter (Coo), and at this time, 'RM is opened and the inverter (INl,
), this pulse is output from the AND circuit (AN+s> to the terminal (LWE, ), and the winding operation is stopped.Furthermore, the flip-flop (F
F+. ) is set, and the AND circuit (AN+4>
gate is opened and the perforation detection circuit (33
), the pulses from each circuit (AN, ), (COI
), (AN9), and (37). Furthermore, after the gate of the AND circuit (AN+2) is closed, the pulse from the perforation detection circuit (33) is processed by the counter (
COO) is not entered.

When winding is completed at low speed and the photographer closes the camera back, the output of the inverter (IN) rises to “High” and is connected to the flip-flop (FF3) via the OR circuit (OR2°).
) is reset, and the output of the AND circuit (A N +.) rises to °IH;ghll, so that the one-shot circuit (O5+o) outputs a "'High" pulse.
Since the flip-flop (FF3) has been reset, this pulse is also output from the terminal (1) via the AND circuit (ANe). Therefore, Figures 5 and 6
As shown in the figure, high-speed empty feeding (preliminary feeding) up to the first item will be performed.

Additionally, if the back cover is opened while idle feeding (preliminary feeding) is being performed at low speed, the output of the inverter (N9) becomes "'High", and as mentioned above, the one-shot circuit ( O3, .) pulses are outputted to the terminal (1) via the AND circuit (ANs), and the low-speed to high-speed idle feed (preliminary feed) immediately shifts. Then, when the transfer of a certain amount of film is completed, the counter (COo) will indicate “High”.
When the pulse is output, the flip-flop is set and the gate of the AND circuit <AN+4) is opened. Also, even if the counter (CO,) outputs a “High” pulse, the back cover is closed and the inverter (INll)
The output is +Low and “Hi” from the terminal (LWE, ).
The pulse of gh'° is not outputted, and high-speed winding continues, and high-speed empty feeding is performed up to the first object, and then empty feeding is stopped. In addition, in the case of a film with a signal hole, "reading is performed as described above before the flip-flop (FF10) is set and the blank feed stops. The Q output of (FF7) is shown in the display section (DI7) in Figure 6, and the /7 circuit (N03).
), (N05).

Table 1 Table 2 As explained above, in the film pre-advance device of the present invention, when a partially shot film is loaded into the camera and used again, the pre-advance frame is adjusted according to the number of frames already taken. By simply setting the number using the setting means, the film is automatically wound until the unexposed part of the film reaches the position of the image frame, so there is no need to repeat the shooting and winding operations many times, unlike in the past. , operation becomes very easy.

Further, according to the embodiment, since the film is wound without being exposed to light, there is no need to block light with a lens cap or the like, making the operation even easier.

[Brief explanation of the drawing]

Figure 1 is a plan view showing an example of a film with data set, Figure 2 is an enlarged view of the signal hole part in Figure 1, and Figure 3 is a block diagram showing the entire camera to which this invention is applied. Circuit diagram: Figure 4 is a circuit diagram of a concrete example of the release circuit (5) in Figure 3; Figures 5 and 6 are circuit diagrams of a concrete example of block (9) in Figure 3; Figure 7. is a perspective view showing the configuration of the perforation and signal hole detection unit, Figure 8 is a plan view of the detection unit in Figure 7 viewed from the camera back side, and Figure 9 is taken along the dashed line 1-1 in Figure 8 Cross-sectional view, Figure 10 shows the perforation detection part (33) in Figure 5.
, a circuit diagram of a specific example of the signal hole detection section (35) and the reading circuit (37), FIG. 11 is a time chart showing the waveforms of each part of the circuit in FIG. 10, and FIG. 13 is a circuit diagram of a circuit for detecting perforations in the film shown in FIG. 12, and FIG. 14 shows waveforms of various parts of the circuit in FIG. 13. Time chart, Figure 15 is a perspective view showing the film detection unit shown in Figure 12, Figure 16 is a sectional view of a camera to which the detection unit shown in Figure 15 is applied, and Figure 17 is the detection unit shown in Figure 15. Figure 18 is a diagram showing the output waveforms of each part of the circuit in Figure 17. Figure 19 is a circuit diagram of the detection circuit connected to the detection part in Figure 15. , FIG. 20 is a diagram showing the waveforms of each part of the circuit in FIG. 19, FIGS. 21, 22, 23, and 24 are cross-sectional views explaining the effect of the optical mask of the perforation detection section. The figure is a graph for explaining the effect of the optical mask. Figure 26 is a sectional view showing the specific configuration of the perforation detection section. Figure 27 is the data imprinting circuit (21) of Figure 3 and the clock circuit. (23), a circuit diagram of a specific example of the expiration warning circuit (25), Fig. 28 is a circuit diagram of a modification of the expiration warning circuit of Fig. 27, and Fig. 29 shows the magnitude of the two data shown in Fig. 27. FIG. 30 is a time chart showing the waveforms of each part in FIG. 29. FIG. 31 is a circuit diagram of a specific circuit of the film sensitivity display section (27) in FIG. 3. , Fig. 32 is a circuit diagram of a modified example of the film exposure number display section shown in Fig. 5, Fig. 33 is a circuit diagram of a film type warning circuit, and Fig. 34 is a circuit diagram of a modification of the film exposure number display section shown in Fig. 5.
The figure is a circuit diagram of a modified example of the film type warning circuit, Figure 35 is a circuit diagram of a modified example of the power supply circuit in Figure 3, and Figure 36 is a circuit diagram of a modified example of the film type warning circuit shown in Figures 5 and 6. FIG. 4 is a circuit diagram of a modified example of a related part. ■、・・・・・・・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・・・・・・・ Quantification means CO+, CO3, CO6, CO7・・・・・・・・・
......First detection means SW,, N[...
・・・・・・・・・・・・・・・・・・・・・・・・
・・・・・・Output means PM・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・・・・・・・・・・
・・・・・・Setting method NO, ・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・・・・・・・・・・
...Discrimination means OR+q, q, IIT++, Mg3.
SI'l13...Oil phase...Song...
・・・・・・・・・・・・・・・・・・・・・・・・
・・・・・・Preliminary feed start means CON, IN, , 8N,
, ,OS, 1 ,PHE...song...song...
・・・・・・・・・・・・・・・・・・・・・・・・
□・・・・・・・・・Second detection means ＾Nlz, O
Rz,,FFz,8N,,,OS,5. FHE...
·song·······················
......Third detection means OR, 3, r, BT
s・・・・・・・・・・・・・・・・・・・・・
...Preliminary feed stop means Applicant: Minolta Camera Co., Ltd. Figure 1 Figure 2 *8 Figure +V 1119 Figure lN23 1N2
7 Figure 14 Figure 15 Ring 18 Figure 2 O- TF+ Taste Figure 21 Figure 22 Figure 23: d3 ・ -1+ 悌 25 Figure distance 悂! d (mm)? ! %26 Figure 828 Figure P 1M30 Figure DF3 ゛C5

Claims (3)

[Claims] (1) A winding means for electrically winding the film, a first detection means for detecting the amount of film winding, an output means for outputting a loading signal related to loading the film, and a setting for setting the number of preliminary feed frames. means, a determining means for determining whether or not the number of preliminary feeding frames is set; a preliminary feeding start means for starting preliminary feeding of the film by the winding means based on the loading signal; and the determining means. When it is determined that the number of preliminary frames to be fed is set, based on the output of the first detection means,
a second detection means for detecting whether or not the film has been wound for the number of preliminary advance frames set by the setting means; and when the determination means determines that the number of preliminary advance frames has not been set; a third detection means for detecting whether a predetermined amount of film has been wound based on the output of the first detection means; and a third detection means for detecting whether or not a predetermined amount of film has been wound based on the output of the first detection means; When it is detected that several minutes of film have been wound up, or when the third detection means detects that a predetermined amount of film has been wound up, the preliminary feeding of the film by the winding means is stopped. A pre-feeding device for film, comprising a pre-feed stop means. (2) The first detection means detects the winding amount of the film based on a signal corresponding to the number of perforations that move as the film winds.
The film preliminary feeding device according to item 1). (3) The preliminary film feeding device according to claim 1 or 2, wherein the winding means winds up the film without exposing the film to light.