JPH0284626A - Film sensiblity setting device - Google Patents

Abstract

PURPOSE:To reset the desired film sensibility according to a photographers intention although a film cartridge with a code is loaded and film sensibility is automatically set by switching a first film sensibility signal inputted to a film sensibility setting means to a second film sensibility signal. CONSTITUTION:The device is provided with a discriminating means 9a which discriminates whether a film cartridge is with a code or not based on the first film sensibility signal outputted from code reading means S1 - S6. Thus, a photographer can select either maintaining the film sensibility signal inputted to an exposure control system by a manual switching means as the first film sensibility signal read from code parts 1 - 6, or invalidating the first film sensibility signal and switching it to the second film sensibility signal by a manual operation. Therefore, although film sensibility is automatically set, it can be reset to the desired film sensibility according to the photographers intention; moreover, when it is switched to the second film sensibility signal by a manual operation, the effect is warned.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for automatically setting the film sensitivity of a film when the film is loaded into a camera.

[Prior Art] A film cartridge has been proposed in which a code portion indicating the film sensitivity of the film contained therein is provided on the outer surface of the film cartridge.

For cameras equipped with an automatic exposure control mechanism, it is necessary to input the film sensitivity of the film being used, but if the film cartridge has a code section on the outside surface that indicates the film sensitivity of the film stored in it, By providing a code reading means on the camera side, film sensitivity information can be automatically obtained, eliminating the need to input film sensitivity information from the outside.

[Problems to be Solved by the Invention] However, depending on the shooting conditions, there may be cases where the photographer wishes to change the film sensitivity, which is input from the code section and is automatically set to the nominal value, such as when the photographer wants to take pictures of worsening conditions. Therefore, it is not possible to meet the needs of photographers simply by automatically setting the film sensitivity using a code section provided on the film cartridge.

This invention aims to solve the above problems.

[Means for Solving the Problems] In order to solve the above problems, the present invention makes it possible to switch a film sensitivity signal automatically set by a code section to a film sensitivity signal set manually. , In a film sensitivity setting device left in a camera using a film cartridge having a code section on the outside surface indicating the film sensitivity of the stored film, the code in the code section is automatically read and the first film sensitivity is set. code reading means for generating a signal; film sensitivity setting means for receiving the first film sensitivity signal and setting the film sensitivity; and a code reading means based on the first film sensitivity signal output from the code reading means. a discriminating means for discriminating whether or not the film cartridge is a film cartridge; a means for generating a second film sensitivity signal that is manually set and indicative of a desired film sensitivity; a manual switching means for switching a film sensitivity signal to the second film sensitivity signal; and a manual switching means operable when the determining means determines that a corded film cartridge is loaded in the camera, and the manual switching means is operated. and display means for displaying a warning when the film sensitivity signal is switched to the second film sensitivity signal.

The manual switching means allows the film sensitivity signal input to the exposure control mechanism to remain the first film sensitivity signal read from the code section, or to disable it and change it to the second film sensitivity signal set manually. You can choose whether to switch to a film sensitivity signal. Thereby, even if the film sensitivity is automatically set, it is possible to reset it to a desired film sensitivity according to the photographer's will. When switching to the second film sensitivity signal set manually, a warning is displayed to indicate this fact.

[Embodiment] FIG. 1 shows a conventionally proposed film cartridge, which includes a code section in which a film sensitivity signal is coded. Now, take a look at the cord part (
It is assumed that among 1) to (6), +1) and (4) are provided as conductive parts.

FIG. 2 is a perspective sectional view showing a film sensitivity reading section in an embodiment of the camera of the present invention adapted to the film cartridge of FIG. (7) limits the subject T
(8) is a cartridge chamber, (9) is a cartridge (Pl) code part (1) to (6), and has electrode groups <Sf) to (Sρ) for reading signals from the code portions (1) to (6) of the cartridge;
P) is an electrode holder equipped with a detection part (9a) that detects whether or not the battery is in the cartridge chamber (8). (9) is rotatable around (9b), but since it is biased counterclockwise, (9a) protrudes when no cartridge is inserted, and (SO~(Sal) is in the storage area ( 8S
+) to (8S6). (1 is the locking part that locks the back cover, and (11) is the locking part that locks the film to the screen frame (7).
This is a positioning pin for positioning against.

Next, the case where the cartridge shown in FIG. 1 is inserted will be explained. When the cartridge (P) is inserted, the detection part (9a) is pushed by the cartridge against the force (9
The electrode holder (9) rotates clockwise around b), and the electrode groups (St) to (S
ω is prominent, and the code part (1) of Patrone (Pl) ~ (
Signals are output from electrode groups (Sl) and (S4) corresponding to (1) and (4), respectively, which are in contact with 6) and have conductive band portions. How the signals read in this way are processed to become film sensitivity information will be described later.

FIG. 3 is a perspective view showing an embodiment of the film sensitivity setting means of the great invention which is adapted to the above-mentioned film cartridge. Reference numeral (20) denotes a back cover, which is equipped with a charge part (22) that rotates integrally with the back cover using (21) as a rotation axis. (2
3) is a light receiving aperture setting member (2) that holds the light receiving aperture (25) and sets the light receiving aperture diameter according to the film sensitivity;
4) is a locking lever that locks the aperture setting member and releases the lock in conjunction with the movement of the camera back. (O is a reading circuit that processes the signals from the electrode group (S+ to Ss) as shown in Figure 2 and outputs digital signals corresponding to the read film sensitivity to (2). 1)-
A) converts the digital signal (to) into an analog signal, and changes the meter (ME) needle (to) according to this analog signal.
The rotation angle of MEa) is determined. This determines the position where the comb tooth part (23b) contacts the needle part (MEλ) when the receiving diaphragm setting member (23) is released from its lock and moves to the right, and therefore the position of the receiving diaphragm setting member is determined. The stopping position will be determined.

The reading circuit (0) further detects when there is no conductive part in all of the electrode groups (S+ to Sg) and outputs a signal to (6). (The odor signal is sent to the D-A conversion circuit (D −
The value of the analog output - of A) is forcibly switched to swing the meter needle (MEa) out of the trajectory of the comb tooth part (23b).

(PD) is a light-receiving element that measures the brightness of a subject, and is held in a holder (30) whose left and right positions can be manually set by operating a portion not shown.

Next, the movement and function of each member will be explained.

The condition shown in Figure 3! ! This shows the case back just before it is completely closed. At this time, the film sensitivity signal has already been read, and if there is a conductor part in the place corresponding to the code part of the film cartridge (Pl), the meter (ME) is set to a predetermined position by that signal. When the lid (20) is completely closed, the locking lever (24) will engage the back lid protrusion (20a).
The spring (28) is pushed clockwise around (24c).
) rotates against T. The locking part (24) of the locking lever (24)
Light receiving aperture setting member (23) that was locked by a)
is thereby released from the lock and moves to the right by the spring (29), and the comb tooth portion (23b) of the light receiving aperture setting member (23)
) comes into contact with the needle (MEa) of the meter (ME) and stops there. Therefore, the light receiving aperture setting member (23) is fixed! The light receiving aperture (25) is set at a position dependent on the amount of rotation of the meter (ME). In addition, the light receiving element (
PD) can be manually moved to the right or left via the holder (30), and exposure compensation can be performed manually.

Next, when the back cover (20) is opened after photographing the film-book, the charging section (22) moves to the position (22') shown by the broken line, and the light-receiving aperture setting member (23) is moved. The locking portion (2) of the locking member (24) resists the spring (29).
4a) until the locking portion (23a) of the aperture setting member (23) is locked.

Next, if there is no conductor part at the position corresponding to the cord part of the film cartridge (P), then the meter (ME) needle part (M
Ea) is the comb tooth part (23b) of the light receiving aperture setting member (23).
), and the diaphragm setting member (23) moves out of the trajectory of (23
When the lock in a) is released, the diaphragm setting member (23) moves to the right until the terminal end (23C) of the id portion comes into contact with the id pin (27). At this time, the light receiving aperture (25) is
The regular aperture (25b) is placed in front of the light receiving element (FD).

In this case, if you set the regular aperture to the most commonly used film speed, in most cases even if a film cartridge without a film speed signal is used,
You can set the film sensitivity to get the correct exposure without making mistakes. In addition, when using a film controller that does not have a film sensitivity signal, use the holder (30).
It is possible to manually set the film speed via .

In this embodiment, the holder (30) is manually operated when performing override photography when the light receiving aperture (25) is automatically set, and when the light receiving aperture is set to the regular aperture (25b). There are two types: when the photodetector (PD) is moved to the position of the light receiving aperture aperture corresponding to the film sensitivity when the film sensitivity of the film used is different from the film sensitivity corresponding to the regular aperture in the case where the film sensitivity is set to . . FIG. 4 shows an embodiment in which these two types of operations can be distinguished and displayed.

The display board (40) shown in Fig. 4 (al) is linked to the light receiving aperture setting member (23) shown in Fig. 3, and when the setting member (23) moves to the right, the display board (40) moves to the left. Move to.

On the display board are the automatically (or manually) set film sensitivity value (41) that corresponds to the receiving aperture aperture, the index that indicates this value (49), and the film sensitivity value that corresponds to the commonly used aperture aperture (25b). A numerical value (42) and a shielding mask (43) are provided, and other parts are transparent.

Figure 4 (bl shows the situation when the light receiving aperture is automatically set. (44) is a fixed plate, and this plate (
44) is provided with a notch (47), and during automatic setting, the finger 1a (44) on the display board (40) is inserted into this notch (47).
49) is displayed to indicate that the film sensitivity value corresponding to that index has been automatically set. In this example, the aperture aperture compatible with ASAloo is automatically set.

(45) is an indicator plate that moves to the left in conjunction with the movement of the light-receiving element holder (3o) in Fig. 3 to the right, and an indicator (48) is provided on this indicator plate (45). It is being The light-receiving element holder (3o) and indicator plate (45) in Fig. gJ3 are reset to predetermined positions by a well-known mechanism when the back cover (20) (Fig. 3) is opened or closed.

Therefore, the indicator (48) on the indicator plate (45) is usually located at the notch (47) of the fixed plate (44).

(46) is a fixed display board, and this fixed display board (46)
Above are the override numbers ゝゝ2'', 1"ISo"1
1-1/l, "-2" is provided. Therefore, when the holder (3o) in FIG. 3 is moved to the right from the state set at a predetermined position by the back cover (20) (that is, moved from the automatically set aperture opening to the small aperture side,
When override is applied to the + side), the instruction plate (45) moves to the left, and the indicator (48) instructs, for example, that +1Ev override photography is to be performed.

FIG. 4(C) shows the display state when automatic setting of the light receiving aperture is not performed. In this case, the diaphragm setting member (23) has moved completely to the right, so the light-receiving diaphragm becomes the regular diaphragm aperture (25b), and the display plate (40) has correspondingly moved completely to the left, forming a notch. At the position of part (47), there is a number (4) corresponding to the commonly used aperture aperture (25b).
2) (ASAloo in this example) is (is).

At this time, if the holder (30) is set at the predetermined position, the indicator (48) on the indicator board (45) will indicate the ASA
100 (42) is specified. moreover,
When the display board (40) goes all the way to the left, the shielding mask (43) shields the override numerical value on the fixed display board (46). The film installed at this time is ASA.
If it is not loo, the photographer moves the holder (3o) to the right and moves the photodetector (PD) to the position of the photodetector aperture corresponding to the film sensitivity, as shown in Figure 4(C). The indicator board (45) is moved to the left and the indicator (45) is moved to the left.
48) indicates the set film sensitivity.

The state shown in FIG. 4(C) shows a state in which the ASA 200 is manually set.

FIG. 9J5 is a perspective view showing an embodiment of a novel film cartridge that has been improved so that a coded film sensitivity signal, which has been proposed in the past, can be read on the back cover side of the camera. Film (F) in Patrone (P)
Cord parts (1 to 6) are set on the back cover side of the flat part of the drawer part, and the cord parts (1) and (4) are the conductive parts.

FIG. 6 shows an embodiment of the camera of the present invention adapted to the film cartridge shown in FIG. 5 (al is a perspective view from the back cover side of the camera. It is a T perspective view showing the inner surface of the back cover with the back cover open.
55) is provided on the camera back, and the conductive part (
Electrodes (Sl) and (S4) of the electrode group corresponding to 1) and (4)
) outputs a signal. On the other hand, the back cover has a circuit that interprets the output signal and displays the interpreted value on the display section (51), and a contact pin s that simultaneously transmits the value to the camera body.
7, has s8.

Therefore, the read information is transmitted to the camera side and processed as exposure information on the camera side.

In addition, the power supply for data recording IT that has been proposed in the past,
By using both the display and imprint optical system, it is also possible to record display or film sensitivity information on the film. Furthermore, since the electrode group (Sl-5s) is positioned to press the film cartridge against the body, the position of the film cartridge can be easily determined, and the conventional film cartridge holding member can be eliminated. Note that the display section (51) normally displays the imprint data and also displays the film sensitivity read out by switching a switch. (52) is a power supply storage unit, (53) is a data recording device control unit, (54)
) is the film pressure plate, and (55) is the imprinting part of the data recording device.

Fig. 7 shows another embodiment of a new film cartridge that reads the film sensitivity on the back cover side. (4) It has a concave shape relative to other parts. With this type, contact failures due to dirt, dust, etc. on the contacts, which would occur with a type where the cartridge has a direct conductive part, are less likely to occur.In addition, since the signals are coded, a variety of signals can be generated by combining them. Although the reading mechanism applicable to this cartridge is not shown, if a known method is used, for example, to turn on and off a switch by the amount of displacement of the recess, direct conduction as shown in the N5 diagram can be used. If the film cartridge is a molded product, a recess for a signal can be easily provided. .

In addition, (Iota) in FIG. 7 is a claw inside the cartridge outlet that is molded at the same time when molding the cartridge, and it engages with the corresponding large film leading end (101a) during rewinding to prevent the film from being rolled in. , to divert the light from the cartridge entrance/exit. Further, the film entrance/exit end has a taper to sandwich the film. In addition, due to the above-mentioned prevention of film entrainment, there is no need to open the film cartridge during film splicing in the processing laboratory, and splicing work can be performed in a bright room.In addition, the film information on the cartridge can be read and information such as work procedures can be coded. By directly punching in the code before the first frame of the film using a puncher, it becomes possible to greatly streamline the process.

In addition, the side surface of the camera back cover of the cartridge where the code section is provided in Figs. Even numbers can be coded with a lot of information.

FIG. 8 shows a new film shape adapted to a camera that uses a film take-up spool to read various information such as film sensitivity and control exposure. (PH) is a perforation, and (SH1-5) (5) is a code portion in which film sensitivity etc. are coded by the presence or absence of a signal hole. The position of this hole is arranged in a constant relationship with the perforation PH. Further, it is desirable to provide five oblong holes at positions not far inside the tip of the film (F), for example, between the beginning and the second of the perforations (PH). Currently, (SH+) and (SH3) are drilled out, indicating a certain film speed. This means that the data is '10100//.

9 is a perspective view of one embodiment of a novel film take-up spool for the film shown in FIG. 8; FIG. (8
0) is the spool body, and (81) is the claw that hangs the beginning of the perforation (PH). (SWI~5W5
) is a contact corresponding to the film signal hole (SHI-5H5), and (82) is a flap that is normally biased in the opening direction as shown in the figure by a spring (not shown). The flap (82) is covered with a conductive material and is grounded. (88) is a power supply terminal, (86) is a grounding terminal, and (87) is a terminal that outputs the read signal as an analog signal. The sliding contacts (85), (84), and (83) are in contact with these terminals (88) to (86), respectively.The flap (82) and the claw (81) should be in contact with each other. There is a notch in the flap (82), so
If the claw (81) enters the notch and the film wraps around the contact (SWI~5W5) and flap (82)
are securely pressed together.

FIG. 10 is an enlarged view of the film signal reading portion of the spool shown in FIG. 9. In this figure, the flap (8
2) has a pair as shown in (82a) and (82b), and the contact group (SWt-5Ws) also has (SWa) and (swb).
There is a pair as shown in . If the film (F) is not wrapped, attach the flap (82b) to the position indicated by the broken line.
) is open. The perforation (PH) of the film (Fl) is hung on the claw (81) of the spool (80), and when the spool rotates once, the flap (82a), (82
b) is pressed by the film (FI) and closed at the position shown by the solid line.At this time, a signal hole (S) is opened in the film (F).
H) In that case, the contact (s wb) is connected to the conductive flap (8
2b), it becomes conductive and turns on, and the signal hole (
If there is no SH), the film ()1 becomes an insulator and the contact (
swb) and the flap (82b) are conductive sliding contacts (8
3 to 85) to the camera body, and is used for exposure control, film counter presetting, etc.

FIG. 11 is a plan view showing the shape of another embodiment of a novel film suitable for a camera that reads the film, sensitivity, etc. on the film take-up spool.

(PH) is a perforation, (SN) is a signal notch indicating film sensitivity, and the depth of the notch from the side without perforations (PH) at the leading edge of the film is used as a signal indicating film sensitivity. For example, a spool suitable for this film has an elastic electrode such as conductive rubber on one side and a signal notch (S) in the film on the other side.
N) A resistance band extending in the length direction is provided so that the leading end of the film is sandwiched between them. The reason for this structure is that the length of the resistance band short-circuited by the elastic electrode varies depending on the length of the notch (S N), so the low resistance value of the entire resistance band also varies accordingly, which affects the film sensitivity. You can get the corresponding signal. This signal can be transmitted to the camera body and used for exposure control. In this case, there is only one contact from the spool to the exposure control system, which facilitates the spool design. In addition, as in the previous eight embodiments, the ASA information (
There is enough space even if you add a notch for information on the number of film frames in a position parallel to SN).

FIG. 12 shows a new film shape suitable for a camera that reads a film sensitivity signal for each frame of film and automatically controls exposure. (P)l) is a perforation. (IH) is a positioning hole for the photographing screen provided for each frame, and it is desirable that the shape is different from the signal hole described later. (SH) is a signal hole in which a film sensitivity signal is encoded. This signal hole (SH) is a digital code for film sensitivity depending on whether or not there is actually a hole at a predetermined position between the positioning holes indicated by broken lines.

Such a digital code is provided on each frame of the film. This is so that film sensitivity information can be obtained at any time even without a storage device.

Fig. gJ13 is a perspective sectional view showing the main parts of a new camera adapted to the film shown in Fig. 12. (IHs)
is a positioning hole detection bin corresponding to the positioning hole (IH), and (SHs) is a signal hole detection bin corresponding to the signal hole (SH). (121) is the screen frame, (122) is the film guide that voids the film in the vertical direction, (123)
) is the film contact surface for positioning the film surface at the focal position of the photographic lens (not shown).

FIG. 14 is an enlarged sectional view showing the switch mechanism using positioning hole detection bins (IHs). (131) is the camera body, (132) is the pressure plate that holds the film, (Takumi is the film, (133) is the conductor, (134) is moved up and down on the paper by the positioning hole detection bin (IHs), and the conductor (133) This section generates a signal depending on whether or not it comes into contact with the section.When the film shown in Fig. 11 is used, the tip of the positioning hole detection bin (IHs) is connected to the signal hole (SH).
Since the shape does not fit into the perforation (PH) and its set position is different from the perforation (PH), the detection bin (IHs) becomes a solid line only when the positioning hole (IH) is reached, and the conductor (133) and the section (134) come into contact and turn on.

FIG. 15 is an enlarged sectional view showing the switching mechanism using the signal hole detection bin (SH3). (131) is the camera body, (132) is the pressure plate, (wa is the film, (135)
) is a conductor. Reference numeral (136) is a contact piece, which comes into contact or non-contact with the conductor depending on the movement of the signal hole detection bin (S), and can be in an ON or OFF state. Signal hole (
SH) if there is l! As shown by the solid line in Figure 15,
The tip of the signal hole detection pin (5H5) enters the signal hole (SH) drilled in the film, and the contact piece (136) is a conductor (135).
It comes into contact with and turns on. On the other hand, if there is no signal hole (SH), the tip of the signal hole detection pin (SH3) is pushed against the film surface and pushes up the contact piece (136), as shown by the broken line.
Since the conduction between the contact piece and the conductor is released, an OFF state 1 occurs.

The switch mechanism of the positioning hole detection pin (IHI) shown in FIG. 14 can also be used as a stop signal for film winding in a camera equipped with an electric winding device, for example. Further, in the present invention, it is used as a reading start signal for the signal hole (SH) reading circuit.

In the embodiments shown in FIGS. 13 to 15, only mechanical switching mechanisms are shown, but direct electrical switching mechanisms, such as a pair of contact pieces facing each other with a film in between, may also be used. Switching mechanisms can also be adapted to this system.

FIG. 16 is a list showing the relationship between the film sensitivity and code pattern of the conventionally proposed film shown in FIG. 1. The shaded area is the conductive part, and the white part is the non-conductive part. Therefore, if the conductive part is set as 1 and the non-conductive part is set as 0, Table 1 will be obtained.

Margin table below 1 As you can see from this table, the code part (5) part is the apex value "/3Ev, and the part (6) is 2/3Ev.
The weight of the buttocks. Furthermore, part (2) is lEv,
Part (3) has a weight of 2Ev, part (4) has a weight of 4Ev, and the value determined by (2), (31, and (4)) has a weight of 3Ev.
The value obtained by adding Ev corresponds to the integer part of the apex value of film sensitivity.

FIG. 17 shows a camera circuit suitable for using a cartridge in which the film sensitivity data of the codes shown in FIG. 16 and Table 1 are set. (65) is a conductor, which is located in the portions (1) to (6) of the cartridge (P) in FIG. (64
) is an insulating layer, such as paint, and jl! In the case of Figure 1, the paint on cord parts (1) and (4) has been removed, thereby exposing the conductive parts. Also,
In Figure 17, code parts (1), (2) (41,
(The paint in the area 51 has been removed. Therefore, the example in FIG. 1 corresponds to ASA 400.5v=7, and the example in FIG. 17 corresponds to ASAI 000.5v=8'/3.

To explain the case of Fig. 17 as an example,
1-5g) correspond to the code portions (1 to 6), and the switch (510) corresponds to the code portion (1).

Now the switches (52), (54), (55) are grounded by the switch (51) and the conductor (65) and the inverter (
From lN4) to (INo), %10101'
data is output. The switch (510) is a switch that detects whether or not the cartridge is provided with film sensitivity information.The part (1) is always conductive if the cartridge is provided with film sensitivity information, as shown in Figure 16. Therefore, the output of the inverter (IN9) is always 'High', and a signal indicating that film sensitivity information is provided is output. If the film is not provided with film sensitivity information, the fil part is also an insulating layer, and the switch (310) is not at ground potential, so the output of the inverter (IN9) becomes 'Low' and the film A signal indicating that the sensor is a small torone for which sensitivity information is not provided is output.

In this way, by providing the switch (StO),
It is possible to distinguish between the As person 25 in FIG. 16 and a film for which film sensitivity information is not provided.

If the output of the inverter (IN9) is "High" and the contact piece of the switch (s'W1) is connected to the terminal ■, the output of the AND circuit (ANl) will be "High", and the output of the inverter (IN4) to (INo) will be "High". The data corresponding to the film sensitivity information from is sent to the terminal (14) of the selector (S E l).
It is output from ~(aO).

In the example shown in Fig. 17, the data "10101" is output, and if the contact piece of the switch (SW2) or the terminal ■t is connected, the terminal (R6) is "High", so based on the input data If ASAlooO is displayed on the display (DII) and the contact piece of the switch (sw2) is connected to the terminal ■, the terminal (36) is “Low −”, so the DIN31
is displayed. Although detailed drawings are omitted in FIG. 17, if the terminal (R6) is @High”, the display section (Dl
The AsA display decoder in t) is enabled, and if (R6) is "Low", the DIN display decoder is enabled.

The switch (SW2) may be manually switched from outside the camera, or may be preset at the time of manufacture depending on the country in which the camera is used. Further, when the ")iii" signal from the output terminal (R5) of the AND circuit (ANI) is input to the display circuit (Dll), the A (film sensitivity automatic setting) mark is displayed.

When a digital camera without film sensitivity information is installed, the output of the inverter (lN9) becomes "Low", and the output terminal (R5) of the AND circuit μsl) becomes "Low".
”. This causes the data selector terminal (λ4
) to (2o), the film sensitivity manual setting device ffi! i
The data from (61) is output. Then, in the display section (Dll), As
Person display or DIN display is performed. At this time, the terminal (
Since R5) is "L□w", the M (manual setting) mark is displayed on the display section (Dll).

When the output of the inverter (INe) is @High'' and the contact piece of the switch (5wl) is connected to terminal ■, the output terminal (R5) of the AND circuit (ANl) becomes Low', and the film sensitivity information is set The data selector (SEA) outputs the data from the manual setting device (61) even though the cartridge is attached. For example, it is effective when performing intensified photography.In this case, the in-tweeter (IN
Since the outputs of e) and (INs) both become "High"', the output of the AND circuit (AN2) becomes "High".
", and the characters MEP are displayed on the display section (DI3) to warn that it is sensitized imaging. As a modification of the display, the output of the AND circuit (AN2) is "High".
”, the difference between the output data of the inverters (IN4) to (INo) and the data from the manual setting device (61) is displayed on the display section I3), and you can see how much the film sensitivity has been changed. It may also be possible to provide a warning as to whether or not a photograph is being taken.

Note that the code part (1) in Figure 1 is
) and (S+o) are spatially difficult to contact, the width in the axial direction of the cartridge in the cord portion (1) of FIG. 1 may be made twice that of the other portions.

The resistance (R1) in the fil7 diagram is 5v = 4, ■) is 5v = 2
, inside) is 5v=l, west) is 5v==h, (Rs) is S
v; has a value corresponding to Z. Therefore, from the terminals (R4) to (ao) of the data selector (SEA)
10101” (ASAlooo, Sv = 5V3)
(7) f-9 power output shult, inverter (lN14
) to (INto), the analog switch (A52
), (A54) is “ON”, (As 1 )t (s
3) *(ASs) becomes @OFF'', current from the constant current source (CII) flows through the resistor (T) 1) t (R3), CHI-5>, and the resistor (to be described later)
Current also flows through R6) to (R9) and (g)14), and the exposure control circuit (63) has Sv=5V3+3=
8 The analog signal of V3 is input, and the photometry circuit (62)
Exposure calculation and control are performed together with signals from the In other words, when the terminal (R4) is 1, there is a resistor with a weight of 4.
Similarly, when the terminal (R3) is 1, the resistor (R2) has a weight of 2, and the terminal (12) has a weight of 1.
When , the resistance (A)) with a weight of 1 and (λ1) have a weight of 1
When , the resistance with corner weight (R4) is 1, and (20) is 1
(within the resistance with a weight of h) are respectively enabled.

(60) is a manual override setting device, and the display section (D12) displays '+2.0', '+1.5',
'+1. O"%+o, s# %o#ゝ-〇, 5"'-1
, 0”-1, 51m-2, Q# is displayed. (DEI) is a decoder, and terminals (b3) to (bo
) according to the data from the analog switch (Asg) ~
(R513) Outputs the “ON=, @OFF” signal. Table 2 shows the input/output relationship of the decoder (DEI).

Margin Table 2 below: Resistances (R6) to (R13) correspond to Sv;'/z, and resistance (R14) corresponds to Sv;1. Therefore, if the override is +2.0, the analog switch (As
g) ~ (R513) are all “ON” and resistor G1
The current from the constant current 111 [(C1l) flows only into 4), and override imaging of +2.0 Ev is performed.

When override is not performed, the analog switch (ASto) ~ (R513) is “ON”,
As mentioned above, current flows through the resistors (R6) to (west) and (R14), and 5V = 3 at the connection point between the resistors (inside) and (R5).
signal is output and normal photography is performed. Override imaging with other values can be easily understood by those skilled in the art based on Table 2, so the explanation will be omitted.

When the conventionally proposed coding shown in Fig. 16 is used, in A3A25, all of the parts (2) to (6) become insulating layers, and the cartridges where information is provided and the parts where information is not provided. As shown in Fig. 17, in order to distinguish between the cartridge and the cartridge, it is necessary to provide two switches (51) and (51) that contact the part (1), which would be unreasonable in terms of space. As an improvement to the coding in the diagram, ASA25,50°100.200,400,
In the case of 800.1600.3200, it is proposed that the code i (51 and (6) in Figure 9J16 be changed to conductive parts). Figure 18 shows the film sensitivity from a cartridge coded in this way. This is a circuit that reads .

In Fig. 18, if the cartridge is provided with film sensitivity information, if the above code is applied, (5)
, (At least one of the parts 61 becomes a conductive part, and at least one of the inverters (INO) and (IN,) becomes "High". Therefore, the output of the OR circuit ((R1) becomes "High", This signal is a signal indicating that the cartridge is equipped with film sensitivity information.

On the other hand, both inverters (INl) and (INO) are 1ζ
When outputting a “High” signal, a NAND circuit (N
The output of AI) becomes ``Low'' and goes through the AND circuit (
Both the outputs of AN3) and (A) become 'Low', and if the output of either the inverter (INl) or (INQ) is '-Low', the output goes to the NAND circuit.
Cover High'l (1'j) and 77 F circuit (A
NA), (AN3) output is inverter (INI),
The same signal as (IN□) is output. Therefore, the 17th
The same data as the data from the inverters (IN4) to (INo) in the figure is obtained from the inverters (IN4) to (IN2), the AND circuit (AN4), and (/11N3). Although the improved coding and the circuit shown in Figure 18 provide the same functionality as shown in Figure 17, the switch (S J O) for determining whether or not the cartridge is equipped with film sensitivity information has been removed. It becomes unnecessary.

Other coding improvements are only for ANA25 (
It is conceivable that the parts 5) and <6) are both conductive parts, and the other coding is the same as the conventional one shown in FIG. FIG. 19 shows a circuit for reading the film sensitivity from a cartridge coded in this way.

In Fig. 19, if parts (5) and (6) of ANA25 are both conductive parts, the output of the NAND circuit (NAr) is "Lo".
becomes w', AND circuit (AN3), (ANA)
The outputs of both become -Low'. On the other hand, in devices other than ASA25, both the inverter (INl) and (INQ) outputs do not become 'H4gh', and the NAND circuit (NA
The output of r) is always “High”, and the inverter (INI) is output from the AND circuit (AN4) and (AN3).
), (INo) are output as they are. Furthermore, if the above-mentioned coding is done, when a cartridge with sensitivity information is installed, the inverter (IN4) to (IN4)
Since at least one of o) is "High", the output of the OR circuit (OR2) becomes "High" and becomes a signal indicating that the film sensitivity is automatically set.

In addition, as a method of improving the coding, add the name to the coding shown in Figure 16, and use the ANA25
For ``00001'', for ANA32, @0001
0' ANA400 is "10001" ASA320
0, data such as "11101" is output, and the resistor 314 in FIG.
Replace the conductive part in section 6) with a non-conductive part and the non-conductive part with a conductive part, and send the signal to the inverter (IN4) to (INQ).
Try to use a signal that does not go through the Even in such a case, by ORing the 5-bit signals of the code sections (2) to (6), a signal for determining whether the film sensitivity is automatically set can be obtained.

In addition, the display section ■tl), (DI2), History I in Figure 17
For 3), it is desirable to have a circuit with one liquid crystal display and one dynamic display, and it is desirable to install these circuits in the position of the film sensitivity setting section of a conventional camera.
60) and (61) are preferably push buttons or slide switches.

In FIG. 17, the read data is converted into an analog signal and output, but if the arithmetic circuit is configured digitally, the read data may be output as is. Furthermore, the code parts f5) and f6) have a weight of 2/3, but in a normal digital circuit, they are weighted as ``B + '/4 + k2. This is an example of a circuit that converts data weighted by ., '2/3 into data weighted by 17., !/4.17.

In FIG. 20, the terminal (a+) is the bit to which the name weighting has been applied, and the terminal (λ0) is the bit to which the delivery weighting has been applied. On the other hand, terminal (d2) is 4, (dl) is y,
, (do) is weighted by weight. In this circuit example, when the terminal (20) is "High" and the name data is input, the approximation of '/3 #V4 + VB is performed and the terminals (dl) and (do) are set to "High".
When the terminal (λ is @High) and the data of b is input, approximation of 2/3# Vz + VB is performed and the terminals (d2) and (dO) are set to "High".
In addition, the terminals (al), Coo)
When both are "Low", the terminals (d2) to (dO) are all "Low".

The circuit for reading data as shown in Figures 17 to 19 on the right, connects the switch (51) to ground and connects the switches (S2) to (
Is the output of the switch (S6) read in parallel?
s), (Sg), (52), (Sa), (54
), and in synchronization with this, the output from the switch (Sr) may be serially read into the shift register.

[Effects of the Invention] As explained above, according to the present invention, even if a corded film cartridge is loaded and the film sensitivity is automatically set, the film sensitivity can be reset to the desired film sensitivity according to the photographer's will. Since this fact is displayed as a warning, it becomes possible for the photographer to take the photograph as intended, and there is no possibility of making mistakes in the photographing operation.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a conventionally proposed film cartridge, Fig. 2 is a perspective view of an embodiment of a camera cartridge into which the cartridge of Fig. 1 can be inserted, and Fig. 3 is a perspective view of a film cartridge that receives light according to the read film sensitivity. FIG. 4 is a perspective view of an embodiment of a mechanism for setting the aperture, FIG. 4 is a plan view of a display section corresponding to tllfJ in FIG. 3, and FIG. 5 is an embodiment of a cartridge modified from the cartridge in FIG. FIG. 6 is a perspective view of an embodiment of a camera suitable for using the cartridge of FIG.
FIG. 7 is a perspective view of another embodiment of the cartridge, FIG. 8 is a plan view of an embodiment of a part of the film reader in which a code indicating film information is provided at the tip of the film, and FIG. 9 is a perspective view of another embodiment of the cartridge. FIG. 10 is a cross-sectional view of the spool shown in FIG. 9, and FIG. 11 is another example of a part of the film leader that provides film information at the tip of the film. FIG. 12 is a plan view of a film in which film sensitivity information is provided for each frame of the film, FIG. 13 is a perspective view of an embodiment of the mechanism for reading information from the film shown in FIG. 12, and FIG. .15 is a cross-sectional view of each reading section in Figure 13, Figure 16 is a list of previously proposed film codes, and Figure 17 is a camera equipped with an information setting device that corresponds to the codes in Figure 16. FIGS. 18 to 20 are circuit diagrams showing modifications of the circuit shown in FIG. 17. S2~Sε... Code signal output member R1, R
5... Analog signal output circuit INQ to IN4
・・・・・・Discrimination circuit ASI~AS5・・・・・・
Control circuits R6 to R14... Constant analog signal output device R5R5... Addition signal output device Patent applicant Minolta Camera Co., Ltd. Fig. 1 Fig. 2 Fig. 1-q Fig. 10 Fig. 9 Figure 13 Figure 74 Figure 1s Figure 10v Figure 78 +V Figure tq

Claims (1)

[Scope of Claim] A film sensitivity setting device suitable for a camera using a film cartridge having a code section on the outer surface that indicates the film sensitivity of the film stored therein, comprising: automatically reading a code in the code section; code reading means for generating a first film sensitivity signal; film sensitivity setting means for receiving the first film sensitivity signal and setting film sensitivity; and a first film sensitivity signal output from the code reading means. determining means for determining whether or not it is a film cartridge with a code based on; means for generating a second film sensitivity signal indicating a desired film sensitivity set by manual operation; and a second film sensitivity signal input to the film sensitivity setting means. manual switching means for switching the first film sensitivity signal to the second film sensitivity signal; the manual switching means is operable when the determining means determines that a corded film cartridge is loaded in the camera; A film sensitivity setting device comprising display means for displaying a warning when the means is operated to switch to the second film sensitivity signal.