JPH0843931A - Camera - Google Patents

Abstract

PURPOSE:To provide a camera which can use a film effectively regardless of the exposed condition of the set film. CONSTITUTION:Regarding a camera which uses a film case 1 provided with an exposure condition instructing plate whose displaying state differs depending on unexposed, partly exposed, or completely exposed state of a frame of a film, the camera is provided with a film sending means (a film supplying motor 23) to send a film piece from the film case 1, a detection means (photoreflectors 31, 32) to detect the displaying state of the exposure condition instructing plate in the film case l, and a control means which allows the film sending means to send the film piece at the time when the detection means detects the display of unexposed or partly exposed state and which forbids the film sending means to send the film piece at the time when the detection means detects the display of completely exposed state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera, and more specifically, to a film which is unexposed or partially exposed.
The present invention relates to a camera that uses a film cartridge having an exposure status indicator that can be changed into three states depending on whether it is a full exposure or not.

[0002]

2. Description of the Related Art Conventionally, in a film cartridge for a JIS135 type 35 mm roll film, after the film is completely exposed, the spool in the film cartridge is rotated in the winding direction to rewind the film leader portion into the film cartridge. It was like this. After the rewinding, the film leader cannot be ejected out of the film cartridge.
It served to indicate the full exposure of the film.

On the other hand, USP 4243943, US
In the film cartridge disclosed in P4947197 and the like, the film leader portion can be automatically extended from the film cartridge by rotating the spool in the film cartridge in the unwinding direction. This is the same whether the film is unexposed, fully exposed or partially exposed. Therefore, depending on whether the film reader unit is inside the film cartridge or outside the film cartridge, it is not possible to provide an indication of the exposure state of the film.

Therefore, the above-mentioned US Pat.
SP4947197 proposes a camera that can be used with a film cassette having an exposure status indicator for visually displaying these exposure statuses.

[0005]

However, in a camera using such a film cassette, there is a problem in handling when the partially exposed film cassette is reloaded into the camera.

That is, when the film cassette in the fully exposed state is loaded in the camera, it is desirable that the camera side detects the state of the exposed state indicator to prohibit the automatic loading of the film and further prohibits the photographing. In addition, when an unexposed film cassette is loaded in the camera, it is natural that the film should be automatically loaded to enable shooting. Furthermore, if a partially exposed film cassette is loaded into the camera,
It is desirable to read the number of exposed frames on the camera side, and after autoloading, feed by the number of exposed frames before shooting is possible.

However, in order to realize this, a means for writing information corresponding to the number of exposed frames on the film and a means for reading the above information written on the film are required on the camera side, and the cost of the camera is reduced. It is difficult to realize because it becomes high.

On the other hand, in the above-mentioned US Pat. No. 4,947,197, the exposure state indicator of the film cassette for partial exposure is set to the full exposure position instead of the partial exposure position.

Further, in the above-mentioned USP 5138350, when a film cassette for partial exposure is loaded, as in the case of full exposure, the feeding of the film is prohibited. That is, the above-mentioned USP4947197, USP5
In either case of 138350, the partially exposed film is reusable and unusable. Therefore, it is possible to prevent the accident that the partial exposure film cartridge is loaded and the first frame is exposed again by mistake.
It is uneconomical because once a film cartridge is rewound once, it cannot be used again.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a camera capable of effectively using a film regardless of the exposure state of the film loaded.

[0011]

In order to achieve the above object, a first camera according to the present invention is a camera using a film cartridge in which a display state is different depending on whether a film frame is unexposed, partially exposed or fully exposed. In the above, a film sending means for sending out a film piece from the film cartridge, a detecting means for detecting the display state of the film cartridge, and a detecting means for detecting the unexposed or the partial exposure are detected. At this time, the control means for permitting the delivery of the film piece by the film delivery means, and for prohibiting the delivery of the film piece by the film delivery means when it is detected that the total exposure is displayed. And.

In order to achieve the above object, the second camera according to the present invention gives a warning when the detection means detects that the partial exposure is being displayed in the first camera. It has a display means for performing.

In order to achieve the above object, the third camera according to the present invention has an exposure state which can be changed into three states depending on whether the film contained therein is unexposed, partially exposed or fully exposed. In a camera using a film cartridge having an indicator, a film feeding mechanism for feeding the film from the film cartridge, a detection means for detecting the state of the exposure state indicator provided in the film cartridge, By the signal from the detection means, when the film contained in the film cartridge is unexposed or partially exposed,
The film contained in the film cartridge is controlled by a signal from the film-feed-out control unit that allows the film to be fed out by the film-feeding mechanism and prohibits the film from being fed out at the time of full exposure, and a signal from the detection unit. When the partial exposure is performed, the display means for displaying the partial exposure is provided.

[0014]

In the first camera according to the present invention, the film feeding means feeds the film piece from the film cartridge. Further, when the detection means detects the display state of the film cartridge and the control means detects that the unexposed or partial exposure is displayed by the detection means, the film delivery means When the fact that the total exposure has been displayed is detected, the sending of the film piece by the film sending means is prohibited.

According to the second camera of the present invention, when the detection means detects that the partial exposure is being displayed in the first camera, the display means warns.

A third camera according to the present invention feeds the film from the film cartridge by a film feeding mechanism. Further, the detection means detects the state of the exposure state indicator provided on the film cartridge,
When the film contained in the film cartridge is unexposed or partially exposed by the signal from the detection means, the film delivery control means allows the film delivery mechanism to deliver the film, and when the film is fully exposed. Is prohibited from being sent out. Further, the display means displays a signal from the detecting means that the film contained in the film cartridge is partially exposed when the film is partially exposed.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

First, prior to the description of the embodiments of the present invention,
The film cartridge used in the camera of the present invention will be described.

FIG. 4 is an external perspective view showing the film cartridge. FIG. 4A is a state when the information recording disk is on the upper side, and FIG. 4B is a state when the exposure state indicating plate is on the upper side. Each state is shown. Further, FIG. 5 is a cross-sectional view of a main part of the film cartridge. Further, FIG. 6 is a front view showing a state when the film is pulled out from the film cartridge.

This film cartridge has a recording disk which rotates integrally with a spool arranged in the central portion of the inside thereof and which encodes and records information about the stored film. The film cartridge stores a film 6 (see FIG. 5) wound around a spool 2 inside a film case 1. This spool 2 is
The upper end portion thereof projects above the film case 1, and when the film cartridge is loaded into the camera body, it engages with a fork provided on the camera side.

Further, on the upper part of the film case 1,
An information recording disk 3 is provided in which information about the stored film is recorded as bar code information. What is recorded as this bar code information is film sensitivity, the number of frames that can be photographed, and the like. The information recording disk 3 is integrally formed like a flange on the spool 2 in the film cartridge. Further, a start bit 4 is provided in the bar code provided on the upper surface of the information recording disk 3 as shown in the figure, and is wider than other bar code patterns. Further, a delivery port 5 for delivering the film 6 is formed at one end of the film case 1.

Further, as shown in FIG. 4B, reference numeral 7 indicates an exposure state indicator plate, and a black and white pattern as shown in the drawing is provided on the surface thereof, and the rotation position of the exposure state indicator plate 7 is shown. This makes it possible to distinguish the exposure state of the film inside.

According to FIG. 5, the exposure state indicating plate 7 is integrally formed like a flange at the lower portion of the spool 2 in the film cartridge.

FIG. 6 is a front view showing a state in which the leading end of the film is pulled out from the inside of the film cartridge.

In this figure, reference numerals 13, 14, 15
Are the first frame and the second frame on the film 6, respectively.
An exposure unit corresponding to the frame and the third frame. Also, film 6
Square holes 10, 11 and 12 provided on the film are formed in the upper end portion of the film for positioning the exposure portion corresponding to each frame at a predetermined position on the camera side. Further, in the figure, reference numeral 16 is a film front end portion, and further reference numeral 17
Is the leading edge of the leading piece. The film tip 1
A predetermined distance L is defined between 6 and the leading edge 17 of the leading frame.

FIG. 1 is a view of the configuration of the main part of a camera according to the first embodiment of the present invention, as viewed from the rear surface of the camera body.
Further, FIG. 2 is a view of the main part of the film information reading device in the camera as viewed from above.

A fork 20 that engages with the upper end of the spool 2 of the film cartridge is arranged in the storage chamber in the camera body in which the film cartridge is loaded. A photo-reflector 21 for reading a bar code recorded on the information recording disk 3 is arranged near the upper side of the information recording disk 3.

On the other hand, an aperture 27 is formed behind the photographing optical axis of the camera body, and a spool 22 for winding the photographed film is provided on the opposite side of the storage chamber across the aperture 27. It is arranged. A film feeding motor 23, which serves as a power source for feeding the film 6, is disposed above the aperture 27. The transmission force of the driving force from the film feeding motor 23 is switched by the switching mechanism 24 according to the rotation direction of the film feeding motor 23.

The driving force switched by the switching mechanism 24 is transmitted to the fork 20 and the spool 22 via transmission mechanisms 25 and 26, respectively. The film feeding operation will be briefly described below.

When the film feeding motor 23 rotates in the first direction, the switching mechanism 24 and the transmission mechanism 25,
By the action of 26, the fork 20 and the spool 22 in the camera are rotated in the CW direction (clockwise) when viewed from above. That is, when the film feeding motor 23 is rotated in the first direction with the film cartridge loaded in the storage chamber, first, the fork 20 is rotated in the CW direction to feed the film 6 from the film cartridge. . When the leading end of the film 6 is wrapped around the spool 22 in the camera, the film 6 is further wrapped around the spool 22 by the rotation of the spool 22 in the CW direction.

The switching mechanism 24 and the transmission mechanisms 25 and 26 are set so that the film winding speed due to the rotation of the spool 22 is faster than the film feeding speed due to the rotational force of the fork 20. Therefore, after the film 6 is wound around the spool 22 in the camera, the film 6 pulls the fork 20 and the transmission mechanism 25, but the transmission mechanism 25 can idle in the CW rotation direction. It is designed to absorb the difference in film feeding speed between the two.

On the other hand, when the film feeding motor 23 is rotated in the second direction opposite to the first direction, the mechanisms 24 to
The action of 26 causes the fork 20 to rotate in the CCW direction (counterclockwise). The spool 22 is in a freely idling state, and the film 6 wound on the spool 22 can be rewound into the film cartridge.

In the figure, reference numeral 27 is the film 6 described above.
It is a portion corresponding to the above aperture. Reference numeral 13 is a portion corresponding to the exposed portion of the leading frame on the film.

The square holes 10 on the surface of the film 6
At a position facing the feeding path of the film 6 in order to feed the film 6 by one frame when the film 6 is fed.
A photo interrupter 30 for detecting the feeding amount of is provided. Then, at the time of autoloading after loading a film or after winding after shooting, a required amount of the film 6 is fed, and when the edge on the leading side of the square holes 10 to 12 comes to the front of the photo interrupter 30, The drive of the film feeding motor 23 is stopped. As shown in FIG. 2, the photo interrupter 30 is arranged such that its light emitting portion 30a and light receiving portion 30b sandwich the film 6.

Further, in the figure, reference numerals 31 and 32 are photoreflectors for reading the information of the exposure state indicating plate.

FIG. 3 is a bottom view of the film case 1 seen from the bottom side, showing (a) an unexposed position, (b) a partial exposure position, and (c) a full exposure position.

The state shown in FIG. 3 is a state in which the film case 1 is loaded in the camera and the film has not been pulled out from the film case 1.

When an unused film is loaded in the camera, the exposure state indicating plate 7 is in the unexposed position as shown in FIG. 3 (a). At this time, the portions facing the photo reflectors 31 and 32 have black and white patterns, respectively.

Further, when the partially exposed film is loaded in the camera, the exposure state indicating plate 7 shown in FIG.
The partial exposure position is as shown in (b). At this time, the portions facing the photo reflectors 31 and 32 have a black pattern and a black pattern, respectively.

Furthermore, when a completely exposed film is loaded in the camera, the exposure state indicating plate 7 is set as shown in FIG.
The full exposure position is as shown in (c). At this time, the portions facing the photo reflectors 31 and 32 have a white pattern and a black pattern, respectively.

FIG. 7 is an electric circuit diagram showing the control circuit in the above embodiment. The control circuit will be described below along the flow of signals.

The power supply voltage of the power supply battery 50 is the voltage of the booster circuit 52.
Is boosted to a predetermined constant voltage by a microcomputer (CPU) 51 that controls the entire film information reader.
And so on. The CPU 51 has a plurality of input / output terminals C
1 to C14 are provided. The input terminal C1 has a rear cover detection switch 5 for detecting opening / closing of a rear cover (not shown).
8 are connected. Although not shown, the rear lid is a lid for loading and unloading the film cartridge in the camera body to which the film information reading apparatus of this embodiment is applied. The rear cover detection switch 58 is turned on when the rear cover is open and is turned off when the rear cover is closed. In the figure, reference numeral 53 is a pull-up resistor, and the input terminal C1 is pulled up via the resistor 53.

The photo-reflector 21 for reading a bar code provided on the information recording disk 3 of the film cartridge is connected to the output terminal C2 and the input terminal C3 of the CPU 51. The anode side of the light emitting diode 59 in the photo reflector 21 is connected to the output terminal C2 via the current limiting resistor 54.
And the collector of the phototransistor 60 is connected to the input terminal C3. In the figure,
Reference numeral 55 is a pull-up resistor.

The photo interrupter 30 for detecting the film feed amount is connected to the output terminal C4 and the input terminal C5 of the CPU 51. The light emitting diode 61 in the photo interrupter 30 has its anode side connected to the output terminal C4 via the current limiting resistor 56, and the photo transistor 62 has its collector connected to the input terminal C5. In the figure, reference numeral 57 is a pull-up resistor.

The film feeding motor 23 is driven by a driver circuit composed of a bridge transistor composed of transistors 70-73. In the figure, reference numerals 66 to 69 are base resistors of the transistors 70 to 73, respectively, and one ends of the base resistors 66 to 69 are connected to the output terminals C8, C7, C9, C6 of the CPU 51, respectively. .

When the film feeding motor 23 is rotated in the first direction, the signal from the output terminal C8 of the CPU 51 is set to "L" level, the signal from the output terminal C6 is set to "H" level, and the transistor 70 is turned on. , 73 is turned on. At this time, the output terminal C9 is set to the "H" level, the output terminal C7 is set to the "L" level, and the transistors 71,
72 is turned off.

The film feeding motor 23 is set to the second
When rotating in the direction of, the output terminal C9 of the CPU 51
To "L" level and the output terminal C7 to "H" level to turn on the transistors 72 and 71. At this time, the output terminal C8 is set to "H" level, the output terminal C6 is set to "L" level, and the transistors 70 and 73 are turned off.

Further, when the film feeding motor 23 is stopped, the output terminals C6 and C7 are set to "H" level, the transistors 71 and 73 are turned on, and the film feeding motor 23 is short-circuited. At this time, the output terminals C8 and C9 are set to the "H" level, and the transistor 7
0 and 72 are turned off.

The output terminal C10, the input terminal C11, the output terminal C12, and the input terminal C13 of the CPU 51 are
Photoreflectors 31 and 32 for reading information from the exposure state indicating plate are connected. In addition, reference numeral 7 in the drawing
8 and 80 are light emitting diodes corresponding to
Reference numerals 74 and 76 are resistors for limiting currents, reference numerals 79 and 81 are phototransistors, and reference numerals 75 and 77 are pull-up resistors.

In the photo reflectors 31 and 32, when the reflectances of the exposure state indicating plates facing each other are white, the phototransistors 79 and 81 are turned on, and the input terminal C11 or C13 is at "L" level. Enter. Further, in the photo reflectors 31 and 32, when the reflectance of the exposure state indicating plates facing each other is black, the phototransistors 79 and 81 are turned off, and the input terminal C11 or C13 inputs the "H" level. .

An intermediate rewinding switch (SW) 83 is connected to the input terminal C14 of the CPU 51. In the figure, reference numeral 82 is a pull-up resistor. further,
Reference numeral 84 denotes a display element arranged outside the camera, which receives a control signal from the CPU 51 and displays necessary information for the photographer.

Next, the operation of the camera of this embodiment will be described with reference to FIG.
And it demonstrates with reference to the flowchart shown in FIG.

The flowchart shown in FIG. 8 shows the operation from the photographer opening the rear lid of the camera to load the film cartridge, then closing the rear lid, reading the information of the film cartridge, and ending the autoloading. ing.

In step S1, the CPU 51 monitors the input signal of the input terminal C1. When the level is switched from "L" level to "H" level, the CPU 51 determines that the rear lid is closed, and proceeds to step S2. From "L" level to "H"
If the level is not switched, the determination in step S1 is repeated. In step S2, the CPU 51 sets the output terminals C10 and C12 to the "H" level, and the light emitting diode 7
By setting 8 and 80 in the operating state, information can be read from the exposure state indicating plate on the film cartridge.

Next, in step S3, the input terminal C1
1 and C13 are monitored and C11 = "L",
If C13 = “H”, the position of the exposure state indicating plate on the film cartridge is at the position shown in FIG. 3 (c), which is the full exposure position. Therefore, the process proceeds to step S20, and output terminals C10 and C12 The light emitting diodes 78 and 80 are turned off by setting them to the “L” level. Next, in step S21, the CPU 51 sends a control signal to the display element 84 to display "EXPOSED" on the display element 84.

Next, in step S18, the input terminal C1
Is monitored, and if the "H" level is switched to the "L" level, it is determined that the rear lid has been opened, and then step S1.
9, the warning display "EXPOSED" is turned off, and the process returns to step S1. If the state of the input terminal C1 is not switched from "H" to "L" in step S18, the determination in step S18 is repeated.

In step S3, C11 =
If not "L" and C13 = "H", then step S4
In FIG. 3, if C11 = “H” and C13 = “H”, the position of the exposure state indicating plate on the film cartridge is as shown in FIG.
This is the position (b), which is a partial exposure position, so the E flag is set in step S22, and the flow advances to step S6.

In the step S4, C11 =
If "H" and C13 = "H" are not satisfied, the position of the exposure state indicating plate is the unexposed position as shown in FIG. 3 (a).
6, the output terminals C10 and C12 are set to "L" level to turn off the light emitting diodes 78 and 80.
Then, in step S7, the CPU 51 sets the output terminals C8 and C6 to the "L" and "H" levels, respectively, and starts driving the film feeding motor 23 in the first direction. Then, in step S8, the output terminal C
2 is set to "H" level to activate the light emitting diode 59 to enable reading of the bar code on the film cartridge.

Next, in step S9, the bar code is read. That is, the number of photographable frames of the film cartridge, the film sensitivity, and the like, which are recorded as bar code information, are read. Next, in step S10, the output terminal C2 is set to "L" level and the light emitting diode 59 is turned off. Then, in step S12, the state of the input terminal C5 is monitored to change from "H" level to "L" level. If it changes to, the photo interrupter 3
When it is determined that 0 has detected the square hole 10 corresponding to the position of the leading frame, the process proceeds to step S13, and the CPU 51 sets the output terminals C8 and C6 to "H" and "L", respectively, and the film feeding motor 23 is turned on. Turn off.

Next, in step S14, the CPU 51
Sets the output terminals C6 and C7 to the "H" level to put the film feeding motor 23 in the short-circuited state and apply the short brake. And the state of this short brake is 100
After holding for only msec, the short brake is turned off. Next, in step S15, the output terminal C4 is set to "L" level to turn off the light emitting diode 61.
Then, in step S16, the E flag is monitored, and if the E flag is not set, the currently loaded film has not been exposed and therefore the process returns.

If the E flag is set in step S16, the CP is set in step S17.
U51 sends a signal to the display element 84 to display "PARTIAL" which means that it is partially exposed, and then returns.

Next, the operation from the start of rewinding to the end of rewinding and the setting of the state of the exposure state indicating plate will be described with reference to the flowchart shown in FIG.

Here, for rewinding, the camera automatically rewinds after the number of shots specified in the film cartridge is taken, that is, "auto rewind". There are two types: rewinding and "halfway rewinding".

When rewinding is started, first, step S51.
At, the output terminal C4 is set to the "H" level to activate the light emitting diode 61. Next, in step S52, the CPU 51 sets the output terminals C9 and C7 to the "L" and "H" levels, respectively, to set the film feeding motor 23.
Is started in the second direction. Then step S5
At 3, the timer TM1 is reset and started.
Next, the input terminal C5 is monitored, and if the "H" level is switched to the "L" level, the process returns to step S53 to switch the "H" level to the "L" level.
Next, in step S55, the count value of the timer TM1 is compared with a predetermined value TM11, and TM1 <TM11
If so, the process returns to step S54, and if TM1 ≧ TM11, it is determined that the rewinding is completed, and then step S56.
Proceed to.

During rewinding, the photo interrupter 30 periodically detects the square holes provided on the film, and therefore the loop formed in steps S54 and S55 and the loop formed in steps S53 and S54 are repeated. . However, when the rewinding is completed, the photo interrupter 30 does not detect the square hole provided on the film, so the count value of the timer TM1 becomes larger than the value of TM11 and the process proceeds to step S56.

In step S56, the output terminal C4 is set to "L" level to turn off the light emitting diode 61, and then in step S57, the output terminals C10 and C10.
12 is set to "H" level so that information can be read from the exposure state indicator plate. At this time, the film feeding motor 23 continues to be driven in the second direction, and the exposure state indicator plate is in a rotating state. Next, in step S58, the film is branched depending on the state when the film rewinding is started.

When rewinding midway, next, step S5
In step S59, if the number of exposed frames is zero, the film is in an unexposed state, so the process proceeds to step S60, in which the states of the input terminals C11 and C13 are "H" and "L", respectively. When the state becomes "", the process proceeds to step S61, and the motor drive is turned off.

If the number of exposed frames is not zero in step S59, the process proceeds to step S64, and if the number of exposed frames is N or more, it is determined that the film is fully exposed.
Next, the process proceeds to step S66, and when the states of the input terminals C11 and C13 become "L" and "H", respectively, the process proceeds to step S61.

If the number of exposed frames is less than N in step S64, the film is considered to be partially exposed, and the process proceeds to step S65, where the states of the input terminals C11 and C13 are "H". When the state becomes ",""H", the process proceeds to step S61.

Here, the number of exposed frames (the predetermined number of frames) N is determined based on the number of photographable frames defined in the film cartridge. For example, in the present embodiment, Table 1 shown below is used.
To decide. It should be noted that the number of frames that can be photographed uses the bar code information read during the above-described auto loading.

[0071]

[Table 1] The reason why the total number of exposed frames is N or more is considered as follows.

One of the reasons why the photographer takes out a partially exposed film from the camera body and loads a new film is, for example, that the type of film is changed depending on the change of the photographing condition. . For example, when changing the sensitivity of a film, for example, a negative color film is changed to a reversal film, and in these cases, the film rewound midway may be used again later.

Another reason for taking out the partially exposed film is when the number of frames close to the number of frames specified in the film cartridge is exposed, and there is no opportunity to shoot next. First, the film is developed and printed by rewinding.

Here, the above step S64 → step S
The flow of 65 corresponds to the former, and step S64 →
The flow of step S66 corresponds to the latter. After this, after step S61, the process proceeds to step S62, and the motor short brake is performed. Next, in step S63, the output terminals C10 and C12 are set to "L" level, the light emitting diodes 78 and 80 are turned off, and the process returns.

As described above, according to the above-mentioned embodiment, it can be used even if the partially exposed film is reloaded. Further, at this time, the photographer can recognize that the partially exposed film is loaded by the contents displayed on the display means.

[Additional Remarks] According to the embodiments of the present invention described in detail above, the following configurations can be obtained. That is, (1) In a camera using a film cartridge having an exposure state indicator capable of changing into three states depending on whether the built-in film is unexposed, partially exposed or fully exposed, A film feeding mechanism for feeding the film from the film cartridge, a detecting means for detecting the state of the exposure state indicator provided in the film cartridge, and a film built in the film cartridge by a signal from the detecting means. Is a non-exposure or partial exposure, the film feed-out mechanism allows the film feed-out by the film feed-out mechanism, and the film-feeding control means for prohibiting the film feed-out at the time of full exposure, and the signal from the detection means The film contained in the film cartridge is partially A camera having a display unit for notifying the photographer that the partial exposure is performed at the time of exposure.

(2) In a camera using a film cartridge in which the display state differs depending on whether the film frame is unexposed, partially exposed or fully exposed, a film delivery means for delivering a film piece from the film cartridge, and the film cartridge described above. Detecting means for detecting the display state, and when it is detected by the detecting means that the unexposed or partial exposed is displayed, the film sending means permits the film piece to be sent out, and the full exposure is displayed. And a control means for prohibiting the feeding of the film piece by the film feeding means when it is detected that the film feeding has been performed.

(3) The camera according to (2), further comprising display means for issuing a warning when the detection means detects that the partial exposure is not being displayed.

(4) When the detection means detects that the full exposure is displayed, it has a display means for displaying a warning until a member interlocking with the take-out operation of the film cartridge is operated. 2)
Alternatively, the camera described in (3).

(5) The camera according to any one of (2) to (4), wherein the detecting means optically detects the display on the film cartridge.

(6) In a camera using a film cartridge having at least a display means for displaying the partial exposure when the film frame is the partial exposure, a film feeding means for feeding a film piece from the film cartridge, and the film. Detecting means for detecting the display of the displaying means of the cartridge, and when the detecting means detects that the displaying means is displaying the partial exposure, the sending out of the film piece by the film sending means is permitted. A camera equipped with a control means.

(7) In a camera using a film cartridge having an exposure state indicator capable of changing into three states depending on whether the built-in film is unexposed, partially exposed or fully exposed A midway rewind start means for starting the rewind by a manual operation, an automatic rewind start means for automatically starting the rewind after the number of photographable images has been photographed, the midway rewind start means or the above Rewinding means for rewinding the film into the film cartridge in response to any signal from the automatic rewinding start means, and the exposure state instruction provided on the film cartridge after the rewinding operation by the rewinding means is completed. Setting means for setting the vessel at a predetermined position,
When the rewinding is started by the signal from the midway rewinding starting means and the number of photographed frames is smaller than the predetermined number of frames, the setting means sets the exposure state indicator to the partial exposure position, and A camera which sets the exposure position to the full exposure position when the number of frames exceeds the predetermined number, and sets the exposure state indicator to the full exposure position when the rewinding is started by a signal from the rewinding means.

(8) The camera according to (7), wherein the predetermined number of frames is smaller than the specified number of frames of the film cartridge.

(9) In a camera using a film cartridge whose display state is different depending on whether the film frame is unexposed, partially exposed or fully exposed, an intermediate rewind start means for manually starting rewind during shooting And a rewinding means for rewinding the film into the film cartridge in response to a signal from the midway rewinding means, and a display state on the film cartridge after the rewinding operation by the rewinding means is finished. And a setting means for setting partial exposure display when the number is less than the predetermined number of frames and setting full exposure display when the number is greater than the predetermined number of frames.

(10) The camera according to (9), wherein the predetermined number of frames is set according to the number of frames that can be photographed on the film cartridge.

According to the camera described in the above (1), it is possible to effectively take a picture even when a film cartridge for partial exposure is loaded, and it is possible to recognize that the film cartridge is for partial exposure. . According to the camera described in (2) above, the film is sent out even when the film cartridge for partial exposure is loaded,
The film can be used without waste. Above (3)
According to the camera described in (1), the user can be notified when a partially exposed film cartridge is loaded. According to the camera described in (4) above, it is possible to notify that the full exposure film cartridge is loaded. According to the camera described in (5) above, the exposure state of the film cartridge can be easily read. According to the camera described in (6) above, when a cartridge capable of displaying at least partial exposure is used, the film can be sent out even in the case of partial exposure, and the film can be used without waste. it can.

According to the camera described in (7) above, when more than a predetermined number of frames are taken, it is judged that there is no opportunity to take another, and the exposure is treated as full exposure, while less than the predetermined number of frames are taken. In this case, it is determined that the image may be taken again, and the partial exposure can be performed. According to the camera described in (8) above, the predetermined number of frames can be set to a value corresponding to the number of film-capable images. According to the camera described in (9) above, in the camera capable of forced rewinding, an appropriate display of the film cartridge can be performed according to the number of frames taken. According to the camera described in (10) above, an appropriate predetermined number of frames is set according to the number of image frames.

[0088]

As described above, according to the present invention, it is possible to provide a camera that can effectively use a film regardless of the exposure state of the film loaded.

[Brief description of drawings]

FIG. 1 is a diagram of a configuration of a main part of a camera, which is an embodiment of the present invention, viewed from a rear surface of a camera body.

FIG. 2 is a view of the main part of the camera of the above embodiment as viewed from above.

FIG. 3 is a bottom view showing (a) an unexposed position, (b) a partial exposure position, and (c) a full exposure position, as seen from the bottom surface side of the film case used in the camera of the above embodiment.

FIG. 4 is an external perspective view showing a state of (a) an information recording disc on the upper side and (b) an exposure state indicating plate on the upper side of the film cartridge used in the camera of the embodiment. It is a figure.

FIG. 5 is a cross-sectional view of a main part of a film cartridge used in the camera of the above embodiment.

FIG. 6 is a front view showing a state in which a film is pulled out from a film cartridge used in the camera of the above embodiment.

FIG. 7 is an electric circuit diagram showing a control circuit in the camera of the embodiment.

FIG. 8 is an operation in which the photographer opens the rear lid of the camera to load the film cartridge, then closes the rear lid, reads the information of the film cartridge, and finishes the autoloading in the camera of the above-described embodiment. It is a flowchart showing.

FIG. 9 is a flow chart showing the operation of the camera of the above embodiment from the start of rewinding to the end of rewinding and setting of the state of the exposure state indicator plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Film case 2 ... Spool 3 ... Information recording disk 4 ... Start bit 6 ... Film 7 ... Exposure state indication plate 10-12 ... Square hole 20 ... Fork 21 ... Photo reflector 22 ... Camera side spool 23 ... Film feeding motor 24 ... Switching mechanism 25, 26 ... Transmission mechanism 30 ... Photo interrupter 31, 32 ... Photo reflector

Claims (3)

[Claims] 1. A camera using a film cartridge in which a film frame has different display states depending on whether it is unexposed, partially exposed or fully exposed, and a film delivery means for delivering a film piece from the film cartridge, and the display on the film cartridge. When detecting that the unexposed or the partial exposure is displayed by the detection means for detecting the state and the detection means, the delivery of the film piece by the film delivery means is permitted,
A camera, comprising: a control means for prohibiting the feeding of the film piece by the film feeding means when it is detected that the total exposure is displayed. 2. The camera according to claim 1, further comprising display means for issuing a warning when the detection means detects that the partial exposure is displayed. 3. A camera using a film cartridge having an exposure state indicator capable of changing into three states depending on whether the built-in film is unexposed, partially exposed or fully exposed. A film feeding mechanism for feeding the film from the film cartridge, a detecting means for detecting the state of the exposure state indicator provided in the film cartridge, and a film built in the film cartridge by a signal from the detecting means. Is a non-exposure or partial exposure, the film delivery mechanism allows the delivery of the film, and at the time of full exposure, the film delivery control means for prohibiting the delivery of the film, and the signal from the detection means. The film contained in the film cartridge During partial exposure, camera characterized by comprising a display means for displaying that the partial exposure.