JPH01198733A - Film counter - Google Patents

Abstract

PURPOSE:To prevent the interruption of photographing due to film shortage in advance by obtaining the number of remaining frames which can be photographed based on the number of remaining frames which can be photographed inputted by means of an inputting means and based on the number of photographed frames counted by a counting means. CONSTITUTION:The title counter is provided with inputting means 35, 37, GA, FND and DE5 which input data on the number of remaining frames which can be photographed from a loaded film and counting means CO6, CO7, and FCD which count the number of photographed frames and a displaying means DI1 which displays the counted number of photographed frames. Further the counter is provided with a calculating means CO13 which obtains the number of remaining frames which can be photographed, a discriminating means DE7 which discriminates whether the number of remaining frames which can be photographed is smaller than the specific number or not, and display controlling means 141, 143 and NA5 which change displayed shape in response to whether the number of remaining frames which can be photographed is smaller than the specific number or not. Thus, it can be soon recognized that the number of remaining frames which can be photographed is diminished, and cost can be reduced by reducing the number of parts.

Description

[Detailed description of the invention] Production 1@l#! ? - The present invention relates to a film counter that displays information based on the number of frames taken.

Obedience! BACKGROUND ART Conventionally, film counters have been known that perform display based on the number of photographed frames.

Incidentally, although the photographer can know the number of frames taken using the film counter, there have been cases where the photographer has not noticed that the number of remaining frames has decreased, and is unable to take pictures due to lack of film.

Therefore, in order to prevent such a situation from occurring, a camera has been proposed which is equipped with a warning means and issues a warning when the number of remaining frames to be photographed decreases. For example, in Japanese Patent Application Laid-Open No. 54-107339, a sounding body is provided, and when the number of remaining shots is 7 or less, the sounding body is made to alert the photographer that there are fewer shots remaining. A camera has been proposed that will alert you to the

By the way, if a warning means is provided separately from the film counter as in conventional cameras, not only will the number of parts increase and the cost will increase, but there are also the following disadvantages6 Taking the above-mentioned camera equipped with a sounding device as an example, when a sound is emitted when there are fewer shots remaining, it may be difficult to understand what the sound means immediately, especially when using it for the first time. For those who do so, they have no idea why the sound was made, and the warning becomes meaningless. Even if the user understands that it is a warning of some kind, it is difficult to understand what kind of warning it is, so the user may not notice that the number of remaining frames to be photographed has decreased.

Therefore, the present invention allows the photographer to immediately understand that there are fewer frames remaining, prevents the photographer from being unable to shoot due to lack of film, and increases the number of parts and costs. The purpose is to provide a film counter.

In order to achieve the above object, the film counter of the present invention includes an input means for inputting data regarding the number of frames that can be shot on the loaded film, and a means for counting the number of frames that have been shot. and a display means for displaying the remaining number of shots that can be taken based on the number of shots counted by the counting means and the number of shots that can be taken and the number of shots that can be taken. a calculation means for determining whether the remaining number of shots that can be taken is less than a predetermined number; and a determining means that determines whether the remaining number of shots that can be taken is less than a predetermined number; and display control means for changing the display form of the display means.

In the film counter of the present invention having the above configuration, the number of remaining frames that can be photographed is calculated based on the number of frames that can be photographed inputted by the input means and the number of photographed frames counted by the counting means. Then, it is determined whether or not the number of remaining frames that can be photographed is less than a predetermined number, and the display form of the display based on the number of photographed frames is changed depending on the determination result.

Figure 1 shows various data of the film (F).
This figure shows two sides provided by holes (IH) to (EH) at the tip in front of the position of the signal hole (hereinafter, signal holes (IH) to (EH) are representative). 1 is an enlarged view of a part of FIG.

As shown in Fig. 2, the signal hole (SH) is located between two par 7 orifices (P
H) and is located above the top of the par 7 Olesien a.

In FIG. 1, the hole (IH) indicates the start of data from the signal hole (SH), and the hole (AH) is a 5-bit hole in which film sensitivity data is set. In this example 101
The data is 01''. (CH) is set with data corresponding to the number of frames taken on the film. In this example, it is 01''. (YH) is set to the year data in the expiry date data, and in this example is 00110''
It becomes. The most significant bit of this data was "0" in the 80's and "1" in the 90's.

The lower 4 bits are a binary code of 0 to 9. Therefore, this example shows the year 1986. (M
In H), the month data of the expiry date data is set and indicates 1 to 12 in 4-bit binary food.

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, (SW, ) is a photometric switch, and the transistor (
BTU) is for self-retention. (1) is a constant voltage source, which is used when the switch (SW, ) is closed and when the transistor (BT) is closed.
, ) operates when conductive.

(3) is a well-known photometry, arithmetic and display circuit, and the terminal (
The film sensitivity signal is input from terminal (b).
An exposure time signal is output from , and an aperture value signal is output from (e). The switch (SW, ) 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 (BT5) to conduct, causing the coil of the magnet (Mg1) to flow. discharged through the exposed side a
m! The release of the structure is performed. (7) is terminal (b) t
This is a well-known exposure control circuit that performs exposure control based on the exposure time signal and aperture value signal from (C>).

(SWs) is a switch that is closed when the exposure control operation is completed and opened when the exposure control mechanism is completely charged. (SW?) 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. (SH9) is a switch that is closed when the back cover is closed, and (SW, , ) is a manually operated rewind switch.

(9) (±terminal (f) = (i) - (j), (k)
Based on the signals from (1), this is a circuit that has functions such as film winding, reading the film signal hole (SH), film feed, film counter, and film rewind. is Figure 5.

This will be described later based on FIG. When the film is attached, the terminal (1) is at "Low" and the cyrisk (SCR,) is non-conductive.

Then, a "High" pulse is output from the terminal (q). As a result, the transistor (BTz) becomes conductive, the relay magnet (Ml)) works, and the switch (5W
I3) is closed, and the constant voltage source (11) is activated,
Power supply to the motor (Ml) is started. Furthermore, since the base current of the transistors (BT, . . . ) is supplied through the diode (D3), the conduction of the transistors (BT, . . . ) is maintained even if the terminal (q) becomes “Low” 1. Here, the diodes (D,), (D,) are connected to the terminal (q
) and the output of the constant voltage source (11). At this time, the thyristor (SCR, ) is non-conductive, so a resistor (R1) is connected in series to the motor (M), and the motor (M) rotates at a low speed, and the film feed is also slow. Become. 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 will be fed at low speed for a certain period of time, allowing you to confirm that the film has been loaded properly and to ensure that the film is not loaded properly. This prevents malfunctions such as the back cover 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 terminal (r), transistor (BT, ) becomes conductive, transistor (BT, ) becomes non-conductive, and the film is fed at low speed. Dry feed stops. When the back cover is closed in this state, “High” is output from the terminal (q) again.
A pulse is output and idle feeding is started. At this time,
Since the terminal (1) is set to "HiHb", the thyristor (SCR, ) is conductive and idle feeding is performed at high speed. At this time, if the jump feed amount is not preset, the feed will stop after reaching the position of the morning starch in the image frame, and if the jump feed amount is preset, the jump feed amount will be the same as the preset amount. Jump feeding is performed by the amount of the amount, and then 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. Furthermore, 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 the rotation of the motor (M,), the exposure control mechanism is charged, and when charging is completed, the film is wound.
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 signal hole (SH) of the film shown in Figure 1 is read,
Based on the signal from the terminal (p) that becomes illb'', data is output from the data output terminal (FSD) of the circuit (9), and when the terminal (p) is Low'', that is, the film sensitivity data is read. If not, the preset film sensitivity data from the circuit (13) is output. (17) is a D/A conversion circuit, which converts the data from the data selector into an analog signal, performs photometry, and performs calculations.
The data is sent to the display circuit (3) and data imprint circuit (21). Note that in the following drawings, signal lines with diagonal lines indicate multi-bit signals.

(21) is a circuit for data imprinting;
It is only possible to operate when Sw, s) is closed. The data imprinting section of this circuit (21) is shown in FIG.
54). 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 data for copying, and the data terminal (TP) outputs a plurality of clock pulses for timing control. The clock circuit (23) has a liquid crystal display section that displays data for imprinting on the outside of the camera, and a switch (SW21)
is a switch that is turned off when illuminating this display section.

(25) compares the expiry date data provided 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 specific circuit example of 0 or more (21), (23), and (25), which are power batteries for the data imprinting circuit (21), the clock circuit (23), and the warning circuit (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 (SW2-) is a switch for illuminating this display section. A specific circuit example of this circuit (27) is shown in FIG.

Figure fjS4 is a specific example of the release circuit (5) shown in Figure 3. When the photometry switch (Sw+) is closed and the constant voltage circuit (1) starts operating, power is supplied to this circuit and the power-on reset circuit (PR,) operates.
7 lip 70 lip (FFI) via OR circuit (OR+)
) to reset the release switch (SW, )
is closed, at this time the terminal (e) of the circuit (9) becomes “
If it is High'' (signal that allows release, described later), the output of the AND circuit (ANI> becomes ``High'', and this rising signal causes the one-shot circuit (OS) to output ``High'' for a certain period of time. ' pulse is output.

Then, the LO of the output of this one-schiff one circuit (O83)
One-shot circuit (O
83) outputs a "High" pulse, and based on this rise, 7 lip/70 lip (FF, ) is set. As a result, the terminal (i) becomes mHi &h'', the power supply holding transistor (BT+) becomes conductive, and the terminal (
g) becomes 'Low', the power supply transistor (B
T3) becomes conductive. Furthermore, a one-shot circuit (O3:
+) is sent from the terminal (11) to the transistor (B
TU), and the release switch) (Mg,) is operated to perform the exposure control W1 release. Here, the output pulse width of the one-shot circuit (O8+) is set to prevent the photometry switch (SW+) and release switch (SW, ) from being closed almost simultaneously and the release being performed 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 (5
WS) is closed and the output of the inverter (IN, ) is Hi.
gh”, and at this rise, one shift 1 circuit (
A "High" pulse is output from O19) and the 7-lip/70-tub (FF) is reset via the off circuit (OR+). When the film winding is completed and the terminal (e) becomes "Hisl, #," if the release switch (SW, ) remains closed, the output of the AND circuit (AN, ) becomes "High" again. '', the release is performed again and the exposure control operation is performed. In other words, continuous shooting is performed. *When the terminal (e) becomes "High", the release switch (SW3) is open. In this circuit diagram, the power-on reset circuit (PRY) outputs a 'High' pulse, but the output of the AND circuit (ANI) is 'Low'. It is desirable to input the output via the inverter to an AND circuit (AN) as shown in FIG.

5 and 6 are specific circuit examples of the circuit block (9) in FIG. 3. First, this circuit (9) is directly connected to a power source battery (El) as shown in FIG. Therefore, when the power battery (E, ) is installed, the signal generated from the output terminal (PO, ) of the power-on reset circuit (PR3) becomes the reset signal for each circuit in Figures 5 and 6. , furthermore, this terminal (po,) and the rewinding start signal (R
WI) is output from the terminal (PO□) via the OR circuit (OR5), which also serves as a reset signal.

First, the operation when no film is attached will be explained. When the exposure control operation is completed, the terminal (r) becomes “Low”.
", and the one-shot circuit (O8+3) outputs "High
A pulse of ``h'' is output, and the OR circuit (OR) is output from the terminal (NWI) of the OR circuit (OR).

, ) (Fig. 6), a Higl+'' pulse is output from the terminal (q), the transistors (BT, I) in Fig. 3 become conductive, and the motor (Ml) operates. Then, when the shutter charge is completed, The switch (sw,) is opened and the output of the inverter (IN,,) becomes "H5glr". At this time, since no film is attached, the switch (SW7) is closed and the terminal (FSS) is High.
”, the output of the AND circuit (AND) is “H”.
One-shot circuit (O
8,, ), a "High" pulse is output from the terminal (s), the transformer 9 x 9 (B T ?) becomes conductive for a certain period of time, the transistor (BT,,) becomes non-conductive, and the motor (M, ) is turned off. Rotation stops. Therefore, when no film is loaded, the motor (M) stops when the exposure control mechanism is completely charged, and the film winding Isotachibana does not operate. In addition, at this time, 7 lips and 70 tubes (F
F, ) is reset, and the Q output (LHT) becomes “High.
”, the pulse from the output terminal (q) is also output from the terminal (1) via the AND circuit (AN・) (Fig. 6).
, ) are conductive, so the current flowing through the motor (Ml) does not flow through the resistor (R5), and the motor (M, ) 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 rising edge, the one-shot circuit (OS@) outputs “H”.
igl+'' pulse is output and 7 lip/70 tube (
FF3) is set and the terminal (LHT) becomes "Low". Also, the timer (TI,) is a one-shot circuit (
Based on the signal from O8s), a certain period of time for empty feeding for film mounting is counted. Furthermore, in response to the falling signal of the output pulse of the one-shot circuit (O89), a "High" pulse is output from the one-shot circuit (O81°), and the signal from this terminal (LWI) is OR circuit < OR, RI ( The signal is output from the terminal (q) via IjS6 (Fig. 3), and the transistor (BT++) (Fig. 3) is turned on to carry out empty feeding for film mounting.At this time,
The Q output (LHT) of 7 lip/70 tube (FF, ) is L.
ow”, the output (1) of the AND circuit (AN, ) (Fig. 6) remains “Low”, and the thyristor (S
CR, ) is not conducting, so the current flowing through the motor (Ml) flows through the resistor (R3) and the motor (M,
) rotates at low speed, and the film is fed at low speed. 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 consideration has been taken.

When the timer (T1.) finishes counting for a certain period of time, "" is output from the output terminal (LWE2) of the timer (T1.).
High” pulse is output and 7 rip / 70 rip (
FF3) is reset via the OR circuit (OR3) and becomes 7.
Lip 70 knobs (FFs) are set. At this time, the back cover is r! If the switches (SWs) are open and the output of the inverter (IN, ) is “High”
'', the pulse from the timer (T1.) is output from the terminal (LWE, ) of the AND circuit (AN, ). This signal is sent to the terminal via the off circuit (oRls) (Fig. 6). (r), and the transistor (BT, ) in Figure 3 outputs "High" from the timer (TI+).
conducts while there is a pulse h″, and the transistors (BT, ,
) becomes non-conductive, and the rotation of the motor (M, ) stops.

Also, the pulse (L) from the one-shot circuit (O8, .)
WI) by 7 Lips 70 Tsubu (FF2,) (6th
) is set, the Q output becomes High, the Rio 7 circuit (OR2,) becomes High, and the display circuit (DI,) indicates that the film is being wound. be done.

The photographer confirms that the film is loaded, closes the camera back, the shutter switch (SW, ) is closed, and the output of the inverter (IN9) becomes High.
Since the knob (FF, ) is set, the AND circuit (
AN5) becomes “High”. At this rising edge, a "High" pulse is output from the one-shot circuit (O8,), and this pulse is applied to the 7rip 70x7'' (FF,) via the OR circuit (OR,).
70p (FF7) is set, and the Q output (MD) is “
The output terminal (N
The pulse from WI) is output from the terminal (q) via the OR circuit (OR19), and the motor (Ml) starts rotating. On the other hand, the Q output of 7 lips and 70 tubes (FF) (
LHT) is “Higb”, so the terminal (Q)
The pulse from is sent to the terminal (L
), the thyristor (SCR, ) in Figure 3 conducts, and the current flowing through the motor (M,) is the resistance (R1).
The film does not flow through the SCR, but flows through the SCR, and the film is fed at high speed. Note that terminal (1) is LO
-”, the current of the motor (Ml) maintains the conduction of the cyrisk (SCR,).
When the Q output (MD) of the 0 knob (FF, ) becomes “HiBI+”, the signal from the terminal (PWI) is 7 rip/70
Even if the knob (FF2.) is reset, the off circuit (OR2.
The output of 3) becomes “High” and the display circuit (DI, )
This will indicate that the film is being skipped forward. By the way, is this display device? f<DI,) continues to be displayed even after the low-speed idle feed ends because 7 rip and 70 rip (FF2.) are set.

Q output (MD) of 7 rip, 70 rip (FF, ) is “H”
When iHI+"1, the transistor (BT15) becomes conductive and power is supplied to the par 7 olethane detection section (33) and the signal type detection 1 (35) ((31) surrounded by a broken line).Then, the perforation is detected. The section (33) outputs a pulse train due to the perforation of the film being transported, and the signal type detection section (35) outputs a pulse train corresponding to the signal hole (SH) shown in Fig. 1. The reading circuit (37
) reads various data on the film through the signal holes shown in FIG. Then, the pulses generated by the signal holes (E) and I) are output from the reading circuit (37), giving 7 rip and 70 pulses.
The knob (FF, ) is set and the Q output (p) is “High.”
h”.In addition, the par 7 Olesian a detection unit (33)
, the signal hole detection section (35), and the reading circuit (37) will be described in detail based on FIGS. 7 to 26. and,
Among the data read by the reading circuit (37), data (FND) on the number of frames that can be photographed by the signal hole (CH) is displayed on the display device (D1.). Also, #IJ
The film expiry date data (FDD) from the signal holes (YH)t(MH) shown in FIG. 1 is sent to the warning circuit (25) in FIG. 3 via the date circuit (GA). moreover,
The film sensitivity data from the signal hole (AH) is converted into a code suitable for the camera via a date circuit (GA) and a decoder (DE), and is converted to a code that is compatible with the camera, and the circuit enclosed by the broken line in Figure 3 (
19) is sent to the data selector (15).

If a film without a signal hole (SH) is installed, the signal hole (EH) is output from the reading circuit (37).
Since the pulse from
Therefore, all the outputs of the date circuit (GA) are "O", and all the outputs of the detector (DE) are also "0". At this time, the display device fi (
It is desirable that the DI, ) should display 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 “Higl+” and the date of the AND circuit (AN, , ) is opened. At the same time, the output of the inverter (INls) becomes "Low" and the date of the AND circuit (AN+3) is closed. When the signal hole (EH) is detected, the signal hole (EH) is connected from terminal ■ of the reading circuit (37).
A pulse corresponding to the
F, ) is set and the date of the AND circuit (AN, ) is opened. And the Par 7 Olesi 1 detection section (33)
The pulse train from is input to a ternary counter (COs), and the third pulse is output from this counter (COs). This pulse is passed through an AND circuit (AN, ,) and an OR circuit (OR, ,) to a 7-lip/70-tube (FF,
, ) and set to 7 lip/70 knob (FFz). On the other hand, in the case of a film without a signal hole (SH), the terminal ■ of the reading circuit (37) is set to “Low”.
'', the date of the AND circuit (AN, , ) is opened, and the date of the AND circuit (AN, , ) is closed.

The signal from the Par 7 Olesian detection unit (33) is sent to an octal counter (CO,) and a binary counter (C03).
The 16th pulse is output from the binary counter (CO,) and sent to the hexadecimal counter consisting of This 7-rip song was sent to FF,,).
70 knobs (F,) are set.

When the back cover is closed at the point when the film is being fed at low speed, the switch (SW, ) is closed, the date of the AND circuit (AN, ) is closed, and the timer (TI) is closed.
The pulse from E) (LWE2) is an AND circuit (AN3)
There is no output from the terminal (t, WE,), and a pulse is output from the timer (T1.), and 7 rip/7
In this case, the date of the AND circuit (ANs) is open when the FFs are set, so the output of the AND circuit (ANS) immediately becomes "High" and the output from the one-shot circuit (OS, ) is “Higb”
A pulse of “High” is output from the OR circuit (OH2).
A pulse is also output at h''. Therefore, in this case, when the low-speed idle feeding for a certain period of time is completed, the operation immediately shifts to the high-speed idle feeding operation.

(PN) is a data output device that outputs data on the preset number of blank feed frames, and (DIS) is a display device that displays the preset data. When loading a normal film that has not been photographed, the data output device (PN) outputs data of 100...0'' and the output of the NOR circuit (NO+) becomes ``High''. , Therefore, the output of the AND circuit (ANI6) becomes ``H'' at the time when 7 lip and 70 tube (FF, , ) are set.
igl+'', a “High” pulse is output from the output terminal (FWE) of the one-shot circuit (O8,,), and the pulse is output to the terminal (FWE) via the off circuit (OR33) (Fig. 6).
This pulse is output from ``), the idle feed is stopped, and this pulse is further output to the output terminal (FL, ) of the OR circuit (OR14) to set 7 lips and 70 teeth (FF+s).
Q output (Fl2) becomes "High". In the manner described above, the first frame (Fl) is skipped to the shooting angle of view W1.

When loading a film that has been partially photographed, the data output device (PN) is preset with data for a larger number of frames than the number of photographed frames, and this data is output. At this time, the output of the NOR circuit (No,) becomes "Low" and the date of the AND circuit M (AN, 6) is closed, and the output of the inverter (IN,,) becomes "Higl+" and the AND circuit becomes "Low". A date for the circuit (AN,,) is opened. Then, the 7-rip, 70-rip (FFll) is set and the AND circuit (
When the date of AN, ) is opened, the pulse train from the par-7 oleasisin detection section (33) is sent to the octal counter (CO,) via the AND circuit (AN,), and the pulse train is sent to the octal counter (CO,) every 8 perforations (one frame). A pulse corresponding to one perforation is output, and this pulse is sent to a film counter (CO,). The counter (CO) outputs data (FCD) corresponding to the number of frames of the film wound up by the blank feed, and this data (FCD) and the preset number of frames are output from the data output device ff (PN). The data is compared by the hump parator (COM), and when the two match, the output becomes "Higl+" and the AND circuit (AN) is activated.

7) output becomes “Higb”. This causes 'H' to be output from the output terminal (PWE) of the one-shot circuit (O817).
igl+” pulse is output and OR circuit (OR33)
(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 sent to the terminal (FL,
) is set and the Q output (FL2) becomes “High.”
In the case of a film that has been shot halfway in the above manner, the frames that have not been shot are automatically fed forward until they reach the shooting angle of view. This eliminates the complication of having to put the cap on and take multiple aerial shots while feeding the film, making it possible to create a camera that is extremely easy to load film with.

The operation when the number of blank feed frames is erroneously preset to be greater than the number of recordable frames of the film will be explained.

The output pulse (PO2) of the octal counter (Co, ) is passed through the OR circuit (OR, ) to the 7-rip, 70-knob (F
FIT) is given to the circuit, which is reset and loaded, and is also given to a timer circuit (TI), which starts counting a certain period of time every time the pulse from the ffi element (PO2) falls. In addition, at the time when this empty feed is being performed, the Q output (FL
2) is "Low", so the pulse from the terminal (PO2) is not output from the AND circuit (AN+-). When the film is wound up to the final frame by empty feeding, the film is stretched, and the perforation detection section (33) no longer outputs the pulse signal due to the par 7 olethane a. Therefore, before the film is stretched, the counter (C
Even after a certain period of time has elapsed since the pulse outputted from the output terminal (PO2) of the output terminal (Pcs), the next pulse is not outputted from the terminal (pcs). Therefore, the pulse from the timer (TIS) is sent to the 7 rip/70 knob (FF+t), the 7 rip prop (FF17) is set, and the Q output is “
becomes “Highb”.

On the other hand, at this time, the output of the comparator (COM) is Low.
”, the 7-rip/70-tub (FF1.) remains reset and the Q output is “High.” Therefore, the output of the AND circuit (AN2) remains “High.”
h'' is the output terminal of the re-one-shot circuit (O821) (
A pulse of "Higl+" is output from AWE), which is output to the terminal (r) via the OR circuit (OR3) (Fig. 6), and the winding operation is stopped. Further, when the output of the AND circuit (AN2.) becomes "Higb", the warning device ff1 (WA,) 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 pulse from the output terminal (FL, ) of the OR circuit (OR13) sets 7 rip and 70 lub (FF, S), and the Q output (FL2) becomes "Higl+", and exposure control is performed. After the operation of the mechanism is completed, the switch shown in Figure 3 (5Ws)
When is closed, the terminal (r) becomes "Low", the output of the inverter (IN, 3) becomes "High", a "High" pulse is output from the one-shot circuit (O8+3), and the OR circuit ( A pulse is output from the output terminal (NWI) of the output terminal (OH2).This signal is sent to the terminal (
q) and (1), the motor (Ml) rotates at high speed, and charges the exposure control W1vI and winds the film. In addition, the 7 lip prop (FF, ) is set by the pulse from the terminal (NWI), the transistors (BT, S) are made conductive, the perforation detection section (33) is operated, and the pulse train by the par 7 oscilloscope 1 is activated. is sent to the octal counter (CO,) via the AND circuit (AN?) h, 8 (perforation 1 of [
This pulse is output from the terminal (PC8), the film counter (Co,) counts up by one, and the display device (DI, ) corresponding to the output data of the counter (C07)
displayed by. Furthermore, since the terminal (FL2) is "High", the pulse from the terminal (pcs) is output from the AND circuit (ANz), and at the fall of this pulse, the output terminal of the one-shot circuit (O89,) A pulse is output from (NWE) and the OR circuit (0R33
) (Figure tlS6) is output from the terminal (r) and the rotation of the motor (Ml) is stopped. Furthermore, the terminal (N
The pulse from WE) is an OR circuit (OR,,) (Figure 6)
This signal is also outputted from the terminal (u) via the terminal (u), 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. Exposure control 8
! When the operation of the structure is completed and a pulse is output from the one-shot circuit (O81,), the 7-rip prop (FF, ) is reset via the OR circuit (OR3,), and the Q output becomes "High". Become. Further, the 7-lip/70-tub (FF+s) is set by a signal from the terminal (FL, ), and the terminal (FL2) is set to "Higl+", so that the date of the AND circuit (AN2, ) is opened. Further, the timer (TI3) starts counting a certain period of time at the rise of the pulse from the one-shot circuit (O82,).

When I try to wind the last frame, the film is stretched, and the counter (Cog) does not output pulses due to the 8 par 7 oleasisin, and the timer (TI,) finishes counting for a certain period of time and returns "Higl+". No pulse is output from the output terminal (pcs) of the counter (COB) until the pulse is output. Therefore, AND circuit (AN2.)
A pulse from the timer (TI, ) is output from the output terminal (EWE) of the motor, and is output to the terminal (r) via the OR circuit (OR, ) (FIG. 6), thereby stopping winding. Furthermore, the pulse from the terminal (EWE) is an OR circuit (OR34
) (Fig. 6) and is also output to terminal (u).
The data imprinting circuit (21) shown in the figure starts operating.

Furthermore, the 7 lip-flop (FF2.) (Fig. 5) is set by the pulse from the terminal (EWE), and the Q output is “
The warning device fi (WA2) operates to warn that the film has been wound to the final frame.Furthermore, the timer circuit (T
I,) operates 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 (NR
A "HigI+" pulse is output from W) to reset the 7-rip/70-rip (FF21), and at the same time, a rewinding operation, which will be described later, is started. In the case of this final frame, the photographic frame has not been completely rolled up, so the position where the data is imprinted is different from that of the other frames, but the data is reliably imprinted.

“High” from the output terminal (NRW) of the timer (TI,)
When the pulse of “I+” is output, the OR circuit (OR,,)
A pulse is output from the output terminal (RWI) of (Fig. 6), and is passed through the transistor (BT, . . . through the diode (D7)).
) becomes conductive, the relay magnet (Mg5) operates,
The switch (SW, ,) is connected to the power supply and the motor (M
, ) starts to rotate and the unwinding operation begins, and a base current for maintaining conduction is supplied to the base of the transistor (BT, ) through the diode (D9), and the conduction of the transistor (BTl, ) is stopped. Retained. Furthermore, the OR circuit (
A pulse from the output terminal (RWI) of OR31) sets 7 lip/70 knob (FF, , ), opens the date of the AND circuit (ANzi), and the display device (
D1. ) indicates that rewinding is being performed. Then, the film comes off the spool, the switch (SW, ) (Fig. 5) closes, and the terminal (j) becomes Low''.
and the output (FSS) of the inverter (IN5) becomes Hi.
gh” from the re-one shot circuit (O82-) to “Hi”
gh'' pulse is output and the AND circuit (AN2-)
is output from the output terminal (RWE) of the transistor (BT
,, ) becomes conductive, the transistor (BT, ri) becomes non-conductive, the magnet (Mgs) becomes inactive, and the switch (
SW17) is connected to ground, power supply to the motor (M, ) and transistor (BTls) is stopped, and the rewinding operation is stopped. In addition, as mentioned above, the pulse from the output terminal (RWI) of the OR circuit (OR31) is
%) (Fig. 5) and output from the terminal (PO□), which serves as a reset signal for many circuits.

Next, the operation when manually closing the switch (sw, . . . ) (Fig. m6) and rewinding the film will be described. Switch (SW
, , ) are closed, the terminal (1) becomes "Low" and the inverter (INls) becomes "High". When this switch (SW, , ) is closed, if no film is attached, the switch (SW7) is closed, the terminal (FSS-) becomes Higl+'', and the inverter (IN
Since the output of 21) is “Low”, the AND circuit (AN25
) remains "Low" and no rewinding operation is performed. When the film is attached and the switch (Sw++) is closed, the output of the AND circuit (AN2S) becomes “High
+”, and at this rise, the one-shot circuit (O8
A “High” pulse is output from 2S), 7 resop/70 knob (FF2.) is set, and the Q output becomes High.
h''.The output (RWP,) of the NOR circuit (No,) is 7 while the output of the OR circuit (OR2,) is “High”.
While Lip 70 Tsubu (FF2.) is set,
When the terminal (i) is "High", it becomes "Low" and the date of the AND circuit (ANzy> is closed).

To explain the time period during which the output of the NOR circuit (NOs) becomes "Low" in accordance with the operation of the camera, there is an opening (flip 707) when low-speed dry feed starts and high-speed dry feed starts.
open (terminal (FF2'-) is set), open (terminal (MD
) is the opening of "Higb"), and the opening until the winding to the final frame is completed and the rewinding is completed (7 linop/70 tsubu (
FF27) is set) and while the exposure control operation is being performed (terminal) is "High"). Therefore, during this period, 7 lips and 70 tubes (F
F2. ) is set, the AND circuit (AN2□) is “
Does not become Higb''.

If 7 rip/70 rip (FF29) is set in a case other than the above, the output of the AND circuit (AN2.) will be "H".
igl+'', a “Higb” pulse is output from the output terminal (HRW) of the one-shot circuit (O827), and the rewinding operation starts.The rewinding operation is completed as in normal rewinding. It is stopped when the spool comes off and a pulse is output from the one-shot circuit (O82,).

In addition, 7 rip and 70 rip (FF co+) are OR circuits (O
Since it is reset by the falling signal of the pulse from R29), the pulse from the OR circuit (OR2s) 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 (OR2,) is “■]high” and while the 7lip/70γp (FF2S) is set, the output (e) of the NOR circuit (NO3) is “Low”. Release is not performed. While the output of the OR circuit (OR2,) is "High", it is the period from when the film is loaded until the high-speed empty feeding is completed, and during the period when normal winding is being performed.・70 tubes (F
F2. ) is set, the terminal (AW
E) until a "High" pulse is output and rewinding is completed, or until rewinding is manually started and rewinding is completed, or rewinding is automatically started and rewinding is completed. This corresponds to the period up to that point.

Winding and rewinding are indicated by the display device (DI, ) and (DI) in FIG. 6, but this display VC position is omitted and the backflow prevention diode (
If D3) and (Da) are light-emitting diodes, the light-emitting diode (D3) lights up during winding, and the light-emitting diode (D,) lights up during rewinding, so that they can be used both to display winding and rewinding.

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

In addition, Fig. 8 is a plan view of the detection device viewed from the crimp plate (49HQll), and Fig. 9 is a plan view of the detection device viewed from the crimping plate (49HQll).
-I is a sectional view taken from below. (41), (
43) is α after the electricity that brushes (59) and (61) come in contact with when there is a par 7 orion (PH), and the 8th
As shown in Figure 9, Par 7 Olesi 5 (PH)
The pitch is shifted by 1.5 pitches from the pitch of .

(51) is an electrical contact that the plan (61) contacts when there is a signal hole (SH). This brush (59), (61)
The mounting of the crimp plate (49) is fixed by a member (45) integrated with the leaf spring (47), and this member (45)
) is grounded, so 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 (21) described in FIG. 3. (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 (INz5), (IN2.), (IN2.
Therefore, the brushes (59), (61) are connected to the electrical contacts (41), (43),
(51), inverter (IN25), (IN
2. ) and (IN2, ) are configured to output "High" detection signals, respectively.

Fig. fJIJ10 shows a circuit that outputs a par7 oscillator signal and a signal hole signal based on the signal from the detection device shown in Fig. 7.8.9, and a circuit that outputs data from the signal hole based on the two signals. Reading circuit ((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 transistors (BT, S) in Fig. 5 become conductive and start feeding power to the detection parts (33) and (35), the power-on reset circuit (PRs) operates and the 7 Rip 70 tube CFF3
3> is reset. As the film moves, the inverters (INz5), (IN2)) invert signals IN25, IN2, . As shown in FIG. 2, two detection signals are output that are shifted by a half pitch with respect to the pitch of the par 7 hole (PH). Of these two signals, the signal from the inverter (IN27) is sent to the set terminal of the 7 lip-flop (FF:l,).
2. ) is applied to the reset terminal.

Therefore, the 7-rip/70-tube (FF33) is set by the rising signal of the inverter (1N27) and reset by the rising signal of the inverter (1N25). This waveform is shown at (FF3.) in FIG. This 7
The output waveform of the brush (59) and (61 brush) is used as the perforation signal.
) was in contact with the electrical contacts (41) and (43), and if the signal was used as it was, more pulses than necessary would be output due to chattering, etc., and even though one Par 7 Olesi 1 passed, two or more pulses would be output. This is because the par 7 hole will be detected as if it had passed.

Therefore, two inverters (I N25), (I N
27) rise signal causes 7 rip and 70 tsubu (FF3
3) can be used to reset/set the inverter.
--ta < I N2. ), (IN2.) even if the signal changes after it rises, 7 rip/70 rip (
Since the output of FF, , ) is not affected, one par 7
One pulse can be reliably obtained for oleisin. The signal from the 7-lip/70-tub (FF1.) is output to the counter (C01), AND circuit (AN?), and (ANs) shown in FIG. 5 mentioned above.

In addition, as described in Figures 5 and 6, the signal hole (EH
) to output a pulse from the one-shot circuit (OS, ) with a signal based on the output of the 7-rip/70-tube (FF1.) that is set at the rising edge of the third par 7 oscilloscope a signal, and this signal Stop the film advance with
During normal winding, a one-shot circuit (O8
Film advance is stopped by a pulse from 1x). Therefore, the film is stopped with the brush (59) and the contact point (41) in contact with each other by the third par 7 oresian a in the film feeding direction.

In Fig. 10, the signal from the inverter (IN23) through the signal hole (IH) is 7 rip, 70 rip (FFsi
) is set, the terminal ■ becomes 'Higl+'', and the dates of the AND circuit (AN, S) in Figure 5 are opened, whereas the date of the AND circuit (AN13) is set, and a signal hole is created. The circuit enters the operation mode for film feeding for the film that has been loaded, and performs the operations described above.

7 lip/70 lip (FF3S) is inverter (IN2
3) is set at the falling edge of the signal from
It is reset at the fall of the bar 7 oscillator signal from the 70 knob (FF33) (FFff5 in Figure m11).
Then, based on the fall of the output of the NAND circuit (NAI), that is, the rise of the par-7 oscillator signal from the 7-lip, 70-tub (FF33), the output of the 7-lip, 70-tub (FF,...) is sequentially transferred to the shift register. (SR,), and then shift the captured data to terminals (b,,) to (b,), and then to the signal hole (IH).
When the signal from the last hole of the signal hole (MH) is shifted to the terminal (b,), that is, when the signal from the last hole of the signal hole (MH) is taken into the terminal (bl), the output of the inverter (■N2.) becomes “I, ow”, and the output of the NAND circuit (NA, ) becomes “H” regardless of the output of the 7-lip/70-tube (FFs3).
signal holes (IH) to (MH>
The shift operation stops when the signal is captured. Therefore, the terminal (bl) of the shift register (SR,) ~
The output of (b, @) becomes data "1010101001101001" (b1 to b16 in Fig. 11) corresponding to the signal hole of the film in Fig. 1, and the off circuit (OR
This signal is held until the reset signal (PO2) (film rewind start signal) from s) is input to the reset terminal. Then, when the terminal (bo) becomes H1g11'', the gate of the AND circuit (AN3+) is heard, and the pulse from the inverter (N2.) is output from the output terminal ■ of the AND circuit (AN31) through the signal hole (EH). (FIIJ11 diagram AN, ,), the pulse from this terminal ■ sets the 7 lip 70 knob (FFs) in Figure 5, and the third par 7 orei from the 7 lip 70 knob (FF33) is set. At the falling edge of the a signal, the 7th rip in Fig. 5 occurs.
The prop (FF, ) is set (FFI+ in Figure 11).
, film movement is stopped.

Figure fpJ12 is a plan view of a certain type of film.

In the case of this film, the perforations (
PH) A small hole (TI) for film identification is provided between each Par 7 Olesian a and every 4 pieces. Therefore, the perforations shown in FIGS. 7 to 10 are detected 1fi! If such a film is inserted into a camera that uses f, the above small hole (Tl()) will be mistakenly recognized as a par 7 oresin 1, and an incorrect perforation signal will be output, making it impossible to advance the film accurately. A problem arises.

FIG. 13 shows a circuit in which the signal from the hole (TH) in the PA12 diagram is invalidated and only the signal from the perforation (PH) is output, and FIG. 14 is a time chart of this circuit.

In FIG. 9, since the film is moved to the right, a pulse due to the hole (TH) is first output from the inverter (IN25), and 1.
It is output from the inverter (IN2.) with a delay of 5 cycles.

The AND circuit (AN33) connects the output of the inverter (IN27) and the output of the inverter (■N2.) to the inverter (I
Since the inverted signal is input at the holes (TH and N),
) is output from the inverter (IN2S), a signal that becomes "Low" in the middle while the inverter (IN2.) is "High" is output (AN33 in FIG. 14). Similarly, the AND circuit (AN3,
), pulses from the hole (TH) are sent to the inverter (I
When the output is from the inverter (INzi
) is "High" and a signal that becomes "Low" is output (Fig. 14, AN 5).
The lip 70 tube (FF,,) is an AND circuit (AN33
) is reset at the rising edge of the AND circuit (ANz, ) via the OR circuit (OR39) and reset at the rising edge of the AND circuit (ANz, ).
Figure 14 FF, ).

Therefore, the output of 7 lip/70 tube (FFz7) is hole (
It becomes a signal of a par 7 Olesien that is not affected by TH).

fjS15 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 light emitting diodes (LE, ) and (LE3), respectively.
), 7 otodiodes (PD, ), (PD:l), which are shifted by 1/2 period with respect to -mM of par7 olein thin (PH), and the photodetector (PDO) ) is 1/2 period earlier than hole (
TH). (65), (
69) is a mask to improve the detection accuracy of Par 7 Oresi 3 (PH), and 8! For Noh, Figure 21~1
This will be described later based on FIG.

In FIG. 16, (47) is a crimping temporary presser spring, (49)
) is the crimp plate, (83) is the inner cover, and 7 Oto coupler (
63), the light emitting diode (LE,) in (67), (
The part (87) is a diffuse reflection part so that the light from LE, ) that passes through the perforation (PH) is reflected by the film side surface of the inner cover and does not enter the 7-otodiodes (PD, ), (PD2). It's on. (85
) is the back cover, (81) is an idle 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 the lens mount, (
79) is a mirror box.

In this case, the perforation (PH) is detected by the 7-oto coupler, and the film is wound by the 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, a mechanism related to the sprocket is omitted, making it possible to reduce the weight and size.

tJrJ17 is a circuit that uses the configurations shown in FIGS. 15 and 16 to output a bar 7 oscillation signal that is not affected by the holes (TH) in the film shown in FIG.
The figure is a time chart of the output of this circuit. Light emitting diode (LE), (LED) is a constant current source (CII)
, (Cl0), so it emits light with a constant intensity. Then, a photodetector (PD, ), a feedback resistor (R,
), a photometric circuit composed of an operational amplifier (OAl),
The outputs of the photometry circuit, which is composed of a photodetector (PD), a feedback resistor (R3), and an operational amplifier (OA3), are shown in Figure 18 (OAl) and (0A3), respectively. When (PH) is present, there is almost no light reflected by the film, which gradually decreases and then increases as the film moves. Also hole (TH)
When there is, this hole (TH) is par 7 Olesi 3 (
PH), so even if the hole (TH) is located at a position where the output of the photometric circuit is minimal, there will be a considerable amount of light reflected by the film surface around the hole (TH), and the par 7 Olesian (, PH) The value is much larger than the output of .

(AC,) I! An analog converter, it compares the outputs of two photometric circuits. Therefore, when the output of the operational amplifier (OAl) decreases due to the par 7 oscillator (PH), even if a hole (TH) is created at the detection position of the 7 Oto coupler (67) and the output of the operational amplifier (OA3) decreases, Since the value that decreases is smaller than that obtained by Par 7 Oresi 1 (PH), OA<OA3, and the output of the comparator (AC+) is "Low".Similarly, the 7 Otokubura (67) is the Par 7 Oresi 1 (PH). While detecting (PH), the 7 Oto coupler (63) detects hole (TH).
Even if detected, the outputs of the operational amplifiers (OA, ) and (OA3) become OAl>OA, and the output of the amplifier (AC,) becomes 'High'.Therefore, it is not affected by the hole (TH). A perforation signal is obtained.

FIG. 19 shows another example of a circuit for outputting a perforation signal that is not affected by holes (TH). Comparator (AC3), (ACs) is constant current (CIs)
) and a constant voltage using a resistor (R6) and an operational amplifier (0A1)
, (OA,) are compared and each comparator (A
C3), (ACs) from Figure 20 A C3, AC,
The waveform shown in is output.

These two outputs are input to the OR circuit (OR41), and the signal from the comparator (AC3) is 'High', and the signal from the comparator (ACs) is 'High' due to the hole (TH). Also OR circuit (
OR,, ) is the par 7 from the comparator (AC3)
The signal from Oreshitun is output as is, and similarly,
Even if a pulse due to the hole (TH) is output from the fun comparator (AC,) when a signal due to the par 7 orex a is output from the comparator (AC5), the OR circuit (O
R, ,) outputs the signal from the comparator (AC5) as it is due to the par 7 oleasis and -6 (PJI
J20 figure OR, ). Therefore, from the OR circuit (OR,,), the par 7
The oscilloscope 1 signal will be output.

The output of this off circuit (OR, , ) is T-7 rip 70
It is input to the T terminal of Tsubu (TF,), and a signal whose frequency is divided into 1/2 is output from the Q output (201st] TF,
), 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 luminous flux from a light emitting diode (LE) when changing the distance d between 7 autocouplers (PC) and 7 rectors (RF).
This figure shows how the light is specularly reflected by the photodiode (PD) and incident on the photodiode (PD).

In addition, Fig. 25 shows the light receiving element (PD
) is a characteristic curve showing the output of The W4 axis is the distance d1 between 7 autocouplers (pc) and the 7 rector (RF), and the vertical axis is the constant current for the light emitting diode (LE) (for example, 10 wheels A).
This is the relative value of the output of 7 otodiodes (PD) when .

First, the solid line in FIG. 25 will be explained. This solid line is
It shows the output characteristics of seven photodiodes (PD) in the absence of a mask (M). In this case, long distance (d=8m
As the distance d from m) becomes shorter, the angle at which each point on the photodiode (PD) faces the light emitting diode (LE) increases, and the amount of light received increases.Then, at the distance d, the output increases. When the peak approaches, as shown in Fig. 22, the angle from each point on the photodiode (PD) is limited by the barrier ((1), (solid line and solid line, - dot-dashed line and dot-dashed line) 7O (diode (
PD)'s output rapidly decreases.

Therefore, without using the mask (M), par 7 Olesien a (
PH), when there is a film, the distance d,
If there is a par 7 olethane a, the reflected light from a reflective surface at a distance d is received, then the output when detecting a perforation is equal to the output when there is a film. The ratio is about 62%, which poses a problem of poor detection accuracy.

The broken line in Figure 25 shows the output characteristics when a mask (M) is provided to increase the output difference of the 7 photodiodes (PD) when the distances are different, in order to solve the above problem. . In the case of Fig. 21, 7 otodiodes (P
D) Each point on the screen is not obstructed by the mask (M) and the barrier (0) and stares at the entire light emitting diode (LE) (solid line and dotted line, and solid line and one-point N line), and this angle of view is the maximum. At a distance of d, the output of the 7 otodiodes (PDs) becomes maximum. FIG. 22 shows a case where the distance d2 is smaller than dl. In this case, the point on the 7 photodiodes (PD) mentioned above is connected to the light emitting diode (LE) by the rII wall (a) with or without the mask (M). ) by decreasing the viewing angle, the same characteristics as the solid line in FIG. 25 are obtained.

Figure 23 shows a 7-F coupler (pc) and a 7-rector (R)
It is a figure when distance d of F) becomes larger than dl. In this case, the distance between the points on the 7-otodiodes (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 - As shown by the dotted and dashed lines, 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 7-oto coupler (pc) and the film as d, and the distance from the reflecting surface of the light beam that has passed through the 7-o-laser a, the 7-oto-diode (PD ) is approximately 46% of the output when the film is detected, and the detection ability is increased compared to the case without the mask (M).

The one-dot chain line in FIG. 25 is a characteristic curve when the optical system shown in FIG. tj424 is used. In this fJLJ24 diagram, the mask (M) is lower than the point (PDa) on the 7 otodiode (PD).
The end face (Mb) of the mask (Mb) is located closer to the barrier (l) than the point (LEa) on the light emitting diode (LE).
) is located close to the barrier (α).

With this configuration, the mask (M) shown in FIG.
If the distance is d, the output ratio of 7 photodiodes (PDs) will be 100:34, and the characteristic curve will fall more steeply. Further, as shown by the broken line in FIG. 24, when the distance to the reflecting surface (RF') becomes 81 or more, the reflected light from the light emitting diode (LE) no longer enters the 7 photodiode (PD).

Therefore, if the reflective surface of the light that has passed through the perforation is kept farther away than the distance d, the output of the 7 otodiode (PD) will be 0 when detecting the bar 7 olethane a, which will further improve the detection ability. do.

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 bar 7 orex 1 (PH) of the film (F) comes to the detection position.
Most of the rays that passed through the inner tube (PH)
) by the diffuse reflection surface (87) of 7 otodiodes (PD
), and furthermore, the specularly reflected light rays almost never enter the photodiode (PD) as described above.On the other hand, the light rays emitted from the light emitting diode (LE) No. point (LE6) are reflected on the film surface ( Among the light rays incident on Fa), the specular reflection component shown by the solid line is definitely reflected by the 7 otodiodes (Fa).
r'D), but there is a diffuse reflection component shown by a broken line.

As is clear from the figure, most of these components are cut off 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 has an extraordinary effect 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 resonator, (93) is an oscillator, (
95) is a frequency divider, 2048Hz, 128Hz, 32H
Outputs 07 pulses of 2Hz, 2Hz, and IHz. (9
7) 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, various clock pulses from the frequency divider (95) are collectively denoted by the symbol (TP), and the clock circuit (95) is denoted by the symbol (TP).
The data for imprinting from 7) is collectively indicated by the symbol (TD).

Data (TD) from the clock circuit (97) and a 128 Hz clock pulse are input to a dynamic display circuit (99), and the data imprinted on the liquid crystal is dynamically displayed. When the switch (SW2.) is closed, the transistor (BT2.) 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 (EL, ) by RY).
The L panel (EL) emits light and becomes a backlight source for a dynamic liquid crystal display. In addition, since the light source is seven-dimensional, the EL panel lighting can be placed over the liquid crystal display, eliminating the need for an optical system like lamp lighting, eliminating uneven illumination, and improving visual performance. It has the effect of being soft. Furthermore, it is more effective than lighting with lamps for products that are desirable to be small and lightweight, such as power supplies.

(101) is a display circuit that statically displays data from the clock circuit (97) on a liquid crystal, and a transistor (B
T. ) is conductive when the switch (SW, , ) is closed in the data imprinting mode, while the imprinting time control circuit (103) surrounded by a broken line outputs the "Higl+" signal, and the lamp is turned on. (LA) is a constant current source (CI,
) 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 as the light source for imprinting.

Next, the imprint time control circuit (103) surrounded by a broken line
Explain the operation. From terminal (a), DA in figure P143
An analog signal of the apex value of the film sensitivity from the converter (17) is input. In this circuit (103), when the switch (SW + s) is closed and power supply starts, the power-on reset/) circuit (PR,) operates, and a 7-rip signal is generated via the OR circuit (OR4,). 70 whelks (
FF3s) is reset and the transistors (BT,...
) becomes conductive, and the transistors (BT2゜) and (BT23
) , (872%), (B T 27) , (B T
2-) is out of conduction.

When a pulse is input to the terminal (u) from the OR circuit (OR, , ) in Figure 6, at the falling edge of this pulse (film advance has completely stopped) 717 ・Pump ・70 knob (FF39 ) is set and the transistor (BT2゜)
, (BT23) , (BT2S) , (BT2?),
(BT2S) becomes conductive, transistors (BT, . . . ) become non-conductive, data imprinting begins, and imprinting time counting also begins. Resistor (R2) and constant current source (CIs
), the film sensitivity apex value Sv from terminal (a) is input to the subtraction circuit (ios) and K
The voltage of Sv is output, and this voltage is applied to the transistor (
BT2−) into a current of 2 /2 v,
This current is integrated by a capacitor (C0). This integrated voltage output is connected to the constant current source (C'I, ) and the resistor (R9
), the output of the humperator (ACl) becomes “
7 through the OR circuit (OR, 3).
The lip 70 knob (FF39) is reset and the imprinting operation is stopped. Therefore, the imprinting time is controlled to be inversely proportional to the film sensitivity.

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 via the date 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, it is “Low”.
''.A specific example of this magnitude comparison circuit (107) is shown in the second
This will be described later based on FIGS. 9 and 30.

After the reading of the signal hole (SH) is completed, the 7 lip prop (FF, ) shown in Figure 5 is set and the output (p) becomes 'H.
When it becomes “high”, the date of the AND circuit (AN, , ) is opened.Then, the output of the magnitude comparison circuit (107) becomes “H”.
When it becomes “high”, the output of the AND circuit (ANl,) becomes High.
When the output of this AND circuit (ANis) rises, the one-shot circuit (O8, .) is triggered and outputs a "Higb" pulse, and at the fall of that pulse, 7 rip/70 The knob (FF,,) is set.

This opens the date of the AND circuit (AN 3?), and from the AND circuit (AN), ) the frequency divider (95) is opened.
A 2048 Hz clock pulse from A warning sound is generated from the element (109) to warn the photographer that the expiration date of the film has expired.

When 7 rip/70 rip (FF41) is set, the date of the AND circuit (AN, l) is opened and the frequency divider (9
5), the 32Hz clock pulse from
is input to the counter (COS) via AN, , ), -
The 1st clock pulse is output from the carry terminal and passes through the OR circuit (OR=s) to 7 rip and 70 rip (FF,
,) is reset and the AND circuit (A N j?),
The date of (A N , .) is closed, the generation of the warning sound is stopped, and the operation of the counter (COs) is also stopped. 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 (SH3
, ) are switches that are closed in conjunction with the photometric switch (SW, ) shown in FIG. When this switch (SW, , ) is closed, the output of the inverter (IN, 6) becomes High.
This opens the date of the AND circuit (AN4°), and at this time, if the validity period has expired and the output of the AND circuit (AN3*) is High'', the AND circuit (AN,. ) becomes "High", and the one-shot circuit (O832) is triggered by the rise of the output of the AND circuit (AN, .), and the 7-rip and 70-tub ( FF,...) is set and a warning sound is generated 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 embodiment 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 the terminals (b,) to (bus) of the shift register (SR,) in Fig. 10, when (b,) is 1, 1990
When (b,) is O, it is the 1980s, (b-~(
b, 2) is the binary code corresponding to 0 to 9 years, (
b+p) to (b16) are binary foods corresponding to January to December. In the case of the film shown in FIG. 1, the terminals (b,) to (bo) are "001101001" and the expiration date is September 1986. and,
The year and month data of the data (TD) from the clock circuit (97) is decoded by the decoder (DE,) and the data is “010”.
000011'' and March 1988, that is, the operation when the expiration date has expired will be explained.

When the terminal (p) rises to "High" after the reading is completed, a "High" pulse is output from the one-shot circuit (O8s, J), and the 2048
At the falling edge of the Hz clock pulse, the 772371 circuit (
O833) output is D-7 lip/70 tube (DPI)
The AND signal of this output and the 2048 Hz clock pulse is output from the AND circuit (AN43). At the rising edge of this pulse, the shift register (SR,
), (5Rs) contains year and month data (T,) - (T,) and expiration date data (bs) from the decoder (DE+).
-(b, I) are taken in by terminals (1,) to (■1), respectively.

Further, the counters (Co, , ) are reset via OR circuits (OR, , ). Furthermore, the AND circuit (ANl,)
7 rips and 70 tsubu (FF4
1) is set, and the 7-lip/70-tub (FF, s) is reset via the off circuit (ORsl). When the 7-rip prop (FF43) is set, the date of the AND circuit (AN, ) is opened and the 2048 Hz clock pulse is sent to the shift register (SR,), (5Rs).
is input to the counter (CO,,). The shift registers (SR, ) and (SR1) sequentially output the preset data in parallel from the So terminal (Se-real 0output) in synchronization with the clock pulse. Exclusive 7 circuit (EO+), AND circuit (AN,
, ), (AN, , ), the inverter (IN3.) makes up the circuit that determines the magnitude of 1-bit data output from the two SO terminals.Since the outputs of aTo and blg are both 1, (EO+ ) becomes "Low", and then the date of the AND circuit (AN4?) is opened at T, = 1, b, , = o, and a clock pulse is output (Fig. 30 AN).
4? ), 7 lip/70 lip (FF,,) are set. Next, with T=0 and b+a=1, an AND circuit (A
A pulse is output from Nl1), and the 7-rip/70-rip (FF4s) is reset.

T,=0,b,,=i,T6=0,bl. Even when = 1, a pulse is output from the AND circuit (AN, , ), but 7
The lip 70 knob (FF,...) remains reset. Then, when T, = 1, b, = 0, there are 7 rip and 70 rip (FF), and again the AND circuit (AN, ,
) is set by a pulse from

Therefore, if data (TD) is larger, 7 rip/7
The 0 knob (FF,...) is set, and if it is small, it is reset (Figure 30, FF,...), and the counter (FF,...) is set.
CO8) outputs the 9th panel from the carry terminal and passes through the off circuit (OR,,) to 7 rip and 70 tub (
FF4. ) and close the date of the AND circuit (AN, S). Also, the one-shot circuit (O
8is) is triggered and the pulse is output.
8ss), and at the falling edge of this pulse, the Q output of 7 rip/707 p(FF4.) becomes D-7 rip/70 p(DF
, ), and a High'' signal is output to the AND circuit (A N 31) (Fig. 27) (A N 31) (Fig. 27).
Figure F,). In addition, D-7 Lip 70 Tsubu (DF,),
(DF3), 7-rip, 70-tube (FF, ko), and counter (COz) receive the pulse from the power-on reset circuit (PRl) (Fig. 27) or the pulse from the power-on reset circuit (PRl) (Fig. 5) via the OR circuit (OR4g). It is reset by the reset pulse (PO, ) output from the OR circuit (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 + (EO, ) ~ (EOI+
) and (ORss) and (Eo, 3) to (EO21) and (ORs+)l, and the data selector (1
When the film sensitivity from 5) is not ASAloo, 400, the output of the off circuit <0R63) is “■4igb”
become.

When the output of the OR circuit (OR, , ) is "Higl+", the output of the NAND circuit (NA)) is the frequency divider (9
A clock pulse of opposite phase to the 2Hz clock pulse from 5) is 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 the output is "Lo".
w'', blank data is output from the data output circuit (131) so that the display circuit (135) displays a blank display (nothing is displayed). Therefore, the data from the data selector (15) is , 400, 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, the output of the OR circuit (OR63) is 'Low'. ”, that is, when the data from the data selector (15) is ASAloo or 400, the output of the NAND circuit (NA3) is always “
The data selector (133) always outputs the data from the data selector (15), and the display circuit (135) always displays ASAloo or 400.

The switch (SW23) 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 ASAloo or 400, the gate of the AND circuit (AN55) is opened, a 2048Hz clock pulse is constantly output, the EL panel (EL3) is constantly lit, and the display section is On the other hand, when a 2Hz clock pulse is output from the NAND circuit (NA3), the EL panel (E
L3) blinks in the same phase as the blinking of the display section of the dynamic display circuit (135), and lights up to provide illumination 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, it is 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 an initial code corresponding to the number of shots of the film based on signals from terminals (bs) and (by) of the shift register (SR, ) shown in FIG. Table 2 shows an example of the input/output relationship of the decoder (DES).

When the reading is completed and the terminal (p) becomes “Higb”,
At the rising edge of this signal, 6-bit data from the decoder (DE,) is preset into the down counter (C01,). Then, each time the film is fed one frame, the terminal (pcs)
), the down counter (CO1
The contents of 3) are subtracted by one. Therefore, the counter (CO
, , ) are data corresponding to the remaining number of shots. The decoder (DE?) outputs a "High" signal when the output of the counter (CO13) is "000101" to "oooooo", that is, when the remaining number of shots is between 5 and 0.

(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 (Co, ) shown in the f:1IJ5 figure is output, and when the output of the NAND circuit (NAs) 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 MHhigh'', the NAND circuit (NAs) outputs a clock pulse with a frequency of 2Hz. The output is displayed on the display section fICD1. ), the number of shots will be displayed blinking. On the other hand, AND circuit (ANS?)
When the output of is “Low”, the output of the NAND circuit (NA, ) remains “High”, so the data selector (143)
Data (FCD) on the number of shots of the film are constantly outputted from , and the number of shots is displayed as is on the display device (D1.).

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.

As shown in Figure 1, (AH), (CH), (YH), (
It is conceivable to provide a signal hole indicating film type data in addition to the MH) data. The film type is A type (tungsten type, color temperature 3400).
K), B type (tungsten type, color temperature 3200)
K), D type (daylight type, color temperature 5500K)
). Therefore, the A type is “10” and the B type is “0”.
A case will be explained in which the data ``OO'' is set for the D type.

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 (I) and (bl.), and from terminals (bly) and (blm), in the A type, "
10''', "01" for B type, 00" for D type
data is output. Therefore, the output of the exclusive off circuit (EOs+) is of the tungsten type (1
0"', "01"'), it becomes "High", and when it is a daylight type ("00"), it becomes "Low".

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 (R3,) to the terminal (
J32) and (J)I) are input to the camera side. Note that terminals (J21) and (J22) are terminals that transmit the signal of the X contact (Sx) on the camera side to the strobe side.
J, ), (J,2) is 7- on the camera side and strobe side.
This is a terminal that shares a common bus.

When reading is completed, the terminal (ρ) becomes “High”,
When a tungsten type film is installed and the output of the exclusive O7 circuit (EO, .) becomes "High" and a charging completion signal is input from the terminal (J31), the AND circuit (AN, . . . ) becomes "High" and the output of the inverter (IN39) becomes "Low". The switch (SWs3), which opens and closes in the same phase in conjunction with the photometry switch (SW+) in Figure 3, is closed. The output of the inverter (IN, I) becomes "High" and the AND circuit (AN.

5) The date of the AND circuit (ANs,) is opened and the 2
A Hz clock pulse is output and the off circuit (OR15
) , ) The light emitting diode (LE, ) blinks via the transistor (BT4S), giving a warning that a tungsten type film is attached while flash photography is being performed. The transistor (BT4)) is controlled to be conductive or non-conductive in the same phase as the transistor (BTl) in Figure 3, so the output of the inverter (IN=+) is "High" until the release starts and the exposure control is completed. It remains as it is.

When a D type film is installed, the output of the exclusive output circuit 7 (EO, , ) becomes "Low" and the output of the inverter (IN, ) becomes "High". Therefore, When a "High" charging completion signal is input from the terminal (J3.), the output of the AND circuit (AN1,) becomes High, and when the switch (SW33) is closed, the output of the AND circuit (AN63) becomes High. Output is High
'', OR circuit (OR6S), ) Runnostar (B
The light emitting diode (LE, ) lights up via T,5) 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 (LE, ) flashes as a warning, and a daylight type (D type) film is loaded. When the charging completion signal is inputted, the light emitting diode (LE) lights up.

FIG. 34 is another embodiment of a film type warning.

When the reading is completed and the terminal (p) becomes "Higb", the LCD display section (143) displays the values A and B based on the film type data from the terminals (b, ?) and (bl,).
One of the characters will be displayed.

In addition, when using the tungsten type, the output of the exclusive O7 circuit (EO: ++) becomes “High”,
The switch (SW33) is closed and the inverter (IN=
+) becomes “High”, the AND circuit (ANl
The output of 7) becomes "High". As a result, 204882 and 2Hz clock pulses are output from the AND circuit (ANss), and the inverter (IN, 3)
) A warning sound with a frequency of 2 Hz is output by a circuit composed of a Lannostar (BT47), a Zener diode (ZD3), and a piezoelectric element (145). Therefore, in this embodiment, the type of film loaded (A, B, D) is displayed on the display, and
For tungsten types (A, B), a warning sound is generated in conjunction with the closing of the photometric switch. Note that the switch (
SW3. ) is a switch that is manually opened when the 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.
It is designed to be constantly supplied with power from El. 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 figure 35, (9) is! This is the block (9) shown in Figure 3, and a shift register (SR,) (Figure 10) for reading and storing data is provided inside.

(151) shows circuits other than block (9) in FIG. 3 in blocks. When the power battery (El) is installed, the switch (
SW, s) is closed and switch (SW37) is opened. Therefore, the block (151) has a switch (SW3).
9), and the block (9) has a power supply battery (
Power is supplied directly from El). (CS) is a backup capacitor, which is charged from the battery (El) via a diode (D2, ). When the battery (E,) is removed, the switch (SW, 9) 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 (sw, 7). 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 loaded, the output of the inverter (IN,) rises to "Higl+" and the one-shot circuit (O8,) outputs a "Higl+" pulse. At the rise of this pulse, 7 and 70 tabs are set. , Furthermore, at the falling edge of this pulse, the one-shot circuit (OS, , ) is triggered and a "High" pulse is output. This pulse is output from the terminal (q) via the OR circuit (OR, ). The winding of the film starts, the 7 lip/70 tube (FF,) is set, and the transistor (BT, 5) is set.
becomes conductive and power supply to the circuit (31) starts. At this time, the Q output of 7 lips and 70 tubes (FF) is “LoI
II'', the date of the AND circuit (AN, ) is closed and the pulse output to terminal (q) is not output to terminal (1), and the thyristor (SCR, ) in Figure 3 does not conduct, so the speed is low. As the film moves, a pulse from the perforation detection circuit (33) output from the perforation detection circuit (33) is input to the counter (Co.) via the AND circuit (AN, □). .And when -constant Par 7 Olesian a is counted, a 'High' pulse is output from the counter (COo), and at this time, the camera back is opened and the inverter (IN9
．． ) is "Higl+", this pulse is output from the AND circuit (AN+-) to the terminal (LWE, ), and the winding operation is stopped. Furthermore, 7 limp and 70 knobs (FF, .) are set, and an AND circuit (・AN, .) is set.
) is opened and the par 7 Olesian detection circuit (3
The pulses from 3) are applied to each circuit (AN, ), (CO
I), (AN) is sent to (37). Furthermore, after the date of the AND circuit (AN, □) is closed, the pulse from the perforation detection circuit (33) is sent to the counter (
Co,) is not input.

When winding at low speed is completed and the photographer closes the camera back, the output of the inverter (INs) rises to “Higl+” and passes through the off circuit (OR2°) to 7 rip and 70 rip (
The one-shot circuit (O
A "High" pulse is output from 81°) and is output to the terminal (q) via the OR circuit (OR, ), and the 7-rip/70-rub (FF3) is reset, so this pulse is It is also output from the terminal (1) via the AND circuit (AN, ). Therefore, the high-speed empty feeding until the morning rice is served as described in FIGS. 5 and 6 is performed.

Also, if the back cover is closed during low-speed winding (winding), the output of the inverter (IN) will go high.
gt+'', as mentioned above, the pulse from the one-shot circuit (O81o) is output to the terminal (1) via the AND circuit (AN, ), and the speed immediately shifts from low speed to high speed dry feeding (winding). .

After a certain amount of film has been transferred, the counter (
When a “High” pulse is output from Coo), the 7 rip and 70 knob are 7 F and the AND circuit (AN14)
A date will be held. Also, from the counter (Coo) “
Even if a “High” pulse is output, the back cover is closed and the output of the inverter (INz) is “Low” and the terminal (LW
A "High" pulse is not output from EI), and high-speed winding is continued, and high-speed empty feeding is performed until the morning rice is finished, and then empty feeding is stopped. In addition, 7 lips, 70 tubes (F
As described above, in the case of a film provided with a signal hole, reading is performed by the time F, . Further, the Q output of 7 lip/70 tube (FFt) is sent to the display section (DI?) and the NOR circuits (N03) and (N05) shown in FIG.

Table 1 λ week! As explained above, in the film counter of the present invention, the display form of the display means itself that displays the number of frames to be shot depends on whether or not the number of remaining frames to be shot is less than a predetermined number. This allows the photographer to quickly and easily know that the number of remaining frames that can be taken has decreased, and prevents the situation from being unable to take pictures due to lack of film. can. Moreover, unlike conventional cameras that have separate warning means, even first-time users can immediately understand the meaning of the warning, that is, the number of remaining shots that can be taken is reduced. Moreover, it is also possible to reduce the cost by reducing the number of parts.

[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 specific example of the release circuit (5) in the tjS3 diagram; Figures 5 and 6 are circuit diagrams of a specific example of block (9) in Figure 3; Figure 7 is a circuit diagram of a specific example of block (9) in Figure 3; A perspective view showing the specific configuration of the Par 7 Olesian detection unit and the signal hole detection unit, Figure 8 is a plan view of the detection unit in Figure 7 viewed from the back cover side, and Figure 9 is the figure 8. A cross-sectional view taken along the dashed-dotted line I-I.
, 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. Figure 13 is a circuit diagram of the circuit for detecting the perforation of the film shown in Figure Pt512, Figure 14 is a time chart showing the waveforms of each part of the circuit in Figure F513, Fig. 15 is a perspective view showing the film detection unit shown in Fig. 12, Fig. 16 is a sectional view of a camera to which the detection unit shown in Fig. 15 is applied, and Fig. 17 is connected to the detection unit shown in Fig. W415. Circuit diagram of the detection circuit, #S18 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 section in Figure 15, Figure 20 is a diagram showing the waveforms of each part of the circuit in Figure 19, plS21, Figure 22, Figure 23, and Figure 24 are bar 7.
25 is a graph illustrating the effect of the optical mask. Figure 26 is a cross-sectional view showing the specific configuration of the par 7 Olesi detection unit. Figure 27 is a circuit diagram of a specific example of the data imprinting circuit (21), clock circuit (23), and expiration warning circuit (25) in Figure 3, and Figure 28 is the expiration warning circuit in Figure 27. FIG. 29 is a circuit diagram of a specific example of the circuit that determines the magnitude of the two data shown in FIG. 27. FIG. 30 is a time chart showing waveforms of each part of FIG. 29. Fig. tJ31 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, and Fig. 33 is a circuit diagram of a modified example of the film exposure number display section shown in Fig. 5. Circuit diagram of film type warning circuit, No. 34
Figure 136 is a circuit diagram of a modification of the film type warning circuit, Figure 35 is a circuit diagram of a modification of the power supply circuit shown in Figure 3, and Figure 136 is a circuit diagram of a modification of the film type warning circuit shown in Figures 5 and 6. It is a circuit diagram of a modification of a part. 35.37. G^, FND, DEs curved oil phase means Co
,,CO,,FCD...Oil phase curved surface/)lffi
DIl・・・・・・・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・Four reward means CO, 3...
・・・・・・・・・・・・・・・・・・・・・・・・
...... Performance means DE, ...
・・・・・・・・・・・・・・・・・・・・・・・・
......Discrimination means 141.143. N^,...
...Curved surface...Display control means Applicant: Minolta Camera Co., Ltd. Fig. 2 Fig. 8 ÷υ j19 Fig. 14 Fig. 15 Fig. 78 Fig. 20 TF+ s21 Fig. 22 Fig. 23: d3 - Tooooo Figure 28 Figure 30 DF3 ・
s25 figure distance salmon d (mm)? ! S26 figure C5

Claims (3)

[Claims] (1) An input means for inputting data regarding the number of frames that can be taken on the loaded film, a counting means for counting the number of frames taken, and a display based on the number of frames counted by the counting means. a display means for calculating the remaining number of shootable frames based on the number of shootable frames and the counted number of shootable frames; A film counter comprising a discriminating means for discriminating whether the number of frames remaining to be photographed is smaller than a predetermined number, and a display control means responsive to the discriminating means for changing the display form of the display means depending on whether the number of remaining frames that can be photographed is less than a predetermined number. . (2) The film counter according to claim 1, wherein the counting means counts the number of photographed frames based on a signal corresponding to the number of perforations that move as the film is wound. (3) As a result of the determination by the determining means, if the number of remaining frames to be photographed is not less than a predetermined number, the display control means lights up a display by the display means, so that the number of remaining frames to be photographed is determined to be a predetermined number. 2. The film counter according to claim 1, wherein the display means blinks the display when the number of frames is less than the number of frames.