JPH07295041A - Camera - Google Patents

Abstract

PURPOSE:To provide a camera capable of preventing the exposed part of a film from being doubly photographed and simultaneously reducing the futile use of the film to a minimum when a photographer erroneously opens a rear cover and then, closes it again during photographing. CONSTITUTION:A cartridge 101 housing the film 102 having a group of several reader part detecting perforations 102a consecutively formed on a reader part and a frame positioning perforation 102b formed so as to make its number and array different from a group of the reader part detecting perforations and correspond to each frame of the film is loaded in the camera and it is provided with the rear cover 105 for loading the cartridge, a SW control panel 113 for detecting the opening/closing of the rear cover and a cartridge SW for detecting the loading state of the cartridge.

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 particularly to a camera in which an unexposed film is sent out from a cartridge and an exposed film is rewound into the cartridge.

[0002]

2. Description of the Related Art In a conventional film automatic film winding type camera using a 135 size film cartridge, when the above cartridge is newly loaded, the leader portion is automatically wound.

A camera using a film proposed in Japanese Patent Laid-Open No. 4-368733 is a film automatic film winding type camera to which a film cartridge 101 shown in FIG. 8 is applied. The film 102 accommodated in the cartridge 101 has a plurality of perforations 102a formed continuously in its leader portion to form a perforation group for detecting the leader portion. The perforation group 102a and the number and arrangement of perforations are formed. Is different,
The film 102 has a frame positioning perforation 102b provided corresponding to the position of each shooting frame.

[0004]

However, in the conventional film auto-winding type camera using the above 135 size film cartridge, if the photographer accidentally opens the back cover and closes it again during shooting, The automatic loading operation will be performed. In this case, the film is not overlaid on the exposed part of the film, but the film length that can be wound by the automatic winding operation is the film when the back cover is opened and closed again during the shooting. The exposed portion is much longer than the feeding amount until it comes off the aperture opening which is the photographing opening of the camera, and the film is wasted by that much.

Further, when the camera using the film proposed in the above-mentioned Japanese Patent Laid-Open No. 4-368733 is used, even if the back lid is accidentally opened and closed again during photographing, the automatic winding operation is similarly performed. If it is executed, the film feeding amount during the automatic winding is controlled by the number of detected perforations. That is, the camera
In reality, it is determined that the continuous perforation group 102a for detecting the leader portion is detected although the frame positioning perforation 102b is detected.
Therefore, the length of the film fed becomes longer than the length of the film fed during the normal automatic winding operation, and the waste of the film further increases.

The present invention has been made in order to solve the above-mentioned problems, and when the photographer accidentally opens the back cover during photography and closes it again, the exposed portion of the film is exposed. It is an object of the present invention to provide a camera that prevents filming from overlapping and at the same time minimizes film waste.

[0007]

According to one camera of the present invention, a plurality of reader unit detection perforations formed continuously in the reader unit and the number of reader unit detection perforations are set. In a camera in which a cartridge containing a film having frame positioning perforations formed corresponding to each frame of the film so as to be arranged differently is loaded, a back cover for loading the camera into the camera, and It is provided with a back lid state detecting means for detecting an open / closed state of the back lid, and a cartridge detecting means for detecting whether or not the cartridge is loaded in the camera.

When the back lid is opened and closed while the cartridge is still loaded in the camera, the portion of the film exposed by the opening and closing of the back lid is located at a position facing the photographing opening of the camera. The film is fed by the length necessary for the film to come off and by an amount smaller than the length fed immediately after the camera is loaded with the cartridge.

Another camera according to the present invention is a camera in which a patrone having a perforation group for detecting a reader portion and a perforation for positioning a piece is loaded like the above camera, and the patrone is loaded in the camera. For detecting the feeding state of the film by counting the perforation of the film and the feeding device for feeding the film when the cartridge is loaded in the camera. And means for controlling the operation of the feeding device based on the count value of the counting means.

The control means controls the feeding device when the count value of the counting means reaches a predetermined value in the initial film feeding performed immediately after the cartridge is loaded in the camera. Stop. When the film is fed when the case back is opened and closed after the initial film feeding is completed, the count value of the counting means is set to a predetermined value smaller than the predetermined value. The feeding device is stopped when the specified value is reached.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of the camera according to the first embodiment of the present invention as viewed from the rear side with the back cover opened. This camera is a camera that automatically feeds a film out from the film cartridge side when the film cartridge is loaded, and includes the leader detection perforation group 102a and the frame positioning perforation 1 shown in FIG.
A film cartridge 101 accommodating a film 102 having 02b is applied. The film 102 has one end fixed to a spool 101a that is rotatably supported in the cartridge, and is wound and stored in the cartridge 101 in a roll shape.

As shown in FIG. 1, the camera body 106
A back cover 105, which forms a part of the exterior of the camera, is attached with one end thereof rotatably supported. The back cover 1
There is a claw 105a at the other end of 05, and when the back cover is closed, this claw 105a is engaged with and locked by a key member 117 of a keyhole provided on the camera body 106 side. The key part 117
Incorporates a back lid state detecting means for detecting the open / close state of the back lid, and the detailed locking structure and the like will be described later.

A spool chamber 107 is provided at one end on the left side of an aperture opening 109 that is an opening for film exposure provided in the camera body 106, and a cartridge chamber 108 is provided at one end on the right side. ing. A spool spool 112 is rotatably provided in the spool chamber 107.
Is provided. The spool 112 has a claw 112a for hooking the perforation group 102a for detecting the leader portion of the film 102 when the film is loaded, and sequentially winds the film 102.

A fork 114 is rotatably disposed below the cartridge chamber 108. The fork 114 acts at the time of initial feeding or rewinding of the film, meshes with the spool 101a in the cartridge 101, rotates the spool 101a, and rotates the spool 101a to feed the film 102 and rotate it in another direction. Then, the film 102 is rewound. Further, a patrone switch (hereinafter, switch is referred to as SW) operation plate 113 as a patrone detecting means for detecting the loaded state of the patrone 101 slidable in the axial direction is arranged in the patrone chamber 108. . The details of the SW structure are shown in FIG.
Will be explained later.

On the film feeding surface of the camera body 106, the perforations 102a, 10a of the film 102,
A photoreflector (hereinafter referred to as PR) 110, which is a perforation counting unit for detecting the film feed amount, is disposed so as to face the passing position of 2b. The running state of the film 102 is detected by the above-mentioned perforation 1
This is performed by detecting the passing states of 02a and 102b with the PR 110.

On the upper surface of the camera exterior cover 115, a display section 111 of a display panel, which is a film frame number display means and has a function of a frame number counter, is provided. This piece counter function allows both addition and subtraction.

Similarly, a release button 116 is provided on the upper surface of the camera exterior cover 115. By pressing the release button 116, a release SW 202 to be described later will be described.
(See FIG. 5) is switched, and the shutter 204 (see FIG. 5)
Then, the film 102 is exposed through the aperture opening 109. After the exposure, the film 102 is automatically fed for one frame to prepare for the next exposure.

2A and 2B are sectional views of the cartridge chamber 108 including the cartridge detection switch in the unloaded state and the loaded state of the cartridge. The patrone SW operation plate 113 is slidably held along the wall surface of the patrone chamber 108 in the axial direction of the patrone chamber 108, and one end of the patrone SW operation plate 113 is suspended by the camera body 116 from the fork 114 side. Is urged by. The operation plate spring 119 is formed of a coil spring or an elastic member such as rubber.

The cartridge 101 has a cartridge chamber 108.
When loaded inside, the patrone SW operation plate 113 in the state of FIG.
It is pushed up via 13b and becomes the state shown in FIG. In the state of FIG. 2B, the operation plate spring 119
Since the urging force of (1) acts on the Patrone SW operation plate 108, the Patrone 101 is pressed downward by the fixing surface 113a of the Patrone SW operation plate 108 and is fixedly held in the Patrone chamber 108.

Further, a Patrone SW contact piece 118 is fixed to the Patrone SW operation plate 113. The Patrone SW contact piece 118 is made of a conductive thin metal plate and has a spring property. The contact portion at the tip is a cartridge board 1 fixed to the camera body 106 side.
It is elastically pressed against 20. The Patrone S
The W contact piece 118 and the patrone board 120 constitute a patrone SW203 (see FIG. 5) which is a patrone detecting means for detecting the presence / absence of a patrone loading described later.

The cartridge substrate 120 has a conductive portion 12
0a, but as shown in FIG. 2A, in the state where the cartridge 101 is not loaded, the cartridge SW contact piece 118a is not in contact with the conductive portion 120a, so that there is no conduction. However, when the cartridge 101 is loaded, as shown in FIG. 2B, the contact piece 118a is in contact with the conductive portion 120a, and the conductive state is established. As described above, the presence / absence of the cartridge 101 is detected and held.

3 (A) and 3 (B) are cross-sectional views showing the operating state of the back cover opening / closing mechanism and the claws of the back cover and the key portion of the camera body, and FIG. Open state before locking,
(B) shows a state after locking. In addition, FIG.
3B is a sectional view taken along the line AA ′ in FIG. 3A and FIG. 3B is a sectional view taken along the line BB ′ in FIG. 3B, showing an operating state of the back cover SW.

A key member 1 constituting a key part of the camera body
Numeral 17 is slidably held with respect to the camera body 106, and an operation portion 117a operated by a user, and an engagement claw 117b which can be engaged with the claw 105a of the back lid 105 in the back lid closed state. , The key member 117 when the case back is opened
The elastically deformable holding claw 11 that holds the engaging claw 117b of FIG.
7c and.

The key member 117 is attached with a key spring 121 having one end suspended on the camera body 106 or the exterior cover 115. As shown in FIG. 3A, the key member 117 is attached to the back of the key member 117. It is biased in the direction D2 for engaging with the lid claw 105a. In addition, the key spring 121
Is formed of a coil spring or an elastic member such as rubber.

Further, the projection 122, which is a member fixed to the camera body 106 or the exterior cover 115 or an integrally molded member, is provided on the claw 105a in the closed state of the back cover shown in FIG. 3B. The holding claw 117c pressed and deformed in the direction D3 at the lower part is held. Then, when the key member 117 operates the operation portion 117a and moves upward, the deformation of the holding claw 117c is released, and the key member 117 is locked to the projection 122 as shown in FIG. In this state, the claw 105a of the back cover cannot be engaged, that is, the back cover is opened.

As shown in FIGS. 4A and 4B, a back cover SW contact piece 123 which is in sliding contact with the key member substrate 124 is attached to the key member 117, and the contact piece 123 and the substrate 124 are attached. The back cover SW202 (see FIG. 5), which is a back cover state detection means for opening and closing the back cover, is configured by the above. The contact piece 123 is formed of an elastically deformable thin plate of conductive metal, and the contact portion at the tip thereof is slidable in pressure contact with the key member substrate 124 fixed to the camera body 106.

When the back lid 105 is opened, the back lid SW contact piece 123 contacts the conducting portion 124a of the key member substrate 124 as shown in FIG. Further, when the back cover 105 is closed, as shown in FIG. 4B, the conducting portion 124 of the key member substrate 124.
It is separated from a and becomes non-conductive. The open / closed state of the back cover 105 is detected based on the conduction / non-conduction state.

Next, the structure of the control unit of the camera of this embodiment will be described. FIG. 5 is a diagram showing a block configuration of a control unit of the camera, which is a CPU 2 constituting the control unit.
Reference numeral 00 is a control unit that controls the operation of the camera, and controls the camera based on information from each switch and each sensor incorporated in the camera.

Further, as a main switch incorporated in the control section, the release SW 201 is a switch for judging whether or not the photographer has pressed the release button 116. The back cover SW202 is the switch described in FIGS. 4A and 4B, and is a switch for determining whether the back cover 105 is open or closed. Patrone SW
Reference numeral 203 denotes the switch described in FIGS. 2A and 2B, which is a switch for determining whether the cartridge 101 is loaded in the cartridge chamber 108.

As another configuration control element, the shutter 2 is used.
04 is activated when the release SW 201 is turned on, and its opening operation causes a taking lens (not shown).
The subject light is captured via the
Image on 02.

The motor drive circuit 205 is a drive circuit for driving a motor 206 described later according to an instruction from the CPU 200. The motor 206 is a fork 114.
Rotate the film in one direction to put the film 102 on the cartridge 1.
01, and the film 10 by rotating in the other direction
Rewind 2 to Patrone 101. In addition, the motor 2
06 rotates the take-up spool 112 to rotate the film 10
The operation of winding 2 is performed. This drive motor 206 is
It is composed of one to a plurality of motors.

Next, a photographing sequence including loading and unloading of the film cartridge in the camera of the present embodiment having the above-mentioned structure will be described with reference to the flowchart of FIG. When the process shown in FIG. 6 starts and the photographer opens the back cover 105, the back cover 1 is pushed by the back cover SW 202.
The open state of 05 is detected (step S300). Then, when the Patrone 101 is loaded, the Patrone SW
By moving the operation plate 113 upward, the Patrone SW20
3 is turned on, and the loading of the cartridge is detected (step S301). Therefore, when the back cover 105 is closed,
The key member 117 descends to the position shown in FIGS. 3B and 4B, and the closed state of the back lid 105 is detected by the back lid SW202 (step S302).

Subsequently, an automatic loading process is performed in step S303. In this automatic loading process, first, the CPU 20
According to the instruction of 0, the fork 114 (see FIGS. 1 and 2) is rotationally driven in the direction of feeding the film 102 from the cartridge 101 to start feeding the film.

When the leader portion of the film 102 reaches the take-up spool 112, the driving state is switched from driving the fork 114 to driving the take-up spool 112 (see FIG. 1). The take-up spool claw 112a is hooked on one of the perforations in the leader portion detection perforation group 102a of the film 102 to form the take-up spool 1.
The film 102 is fed by the rotational drive of 12, and the motor is stopped when the film of the length set for automatic loading is fed.

The feeding amount of the film 102 during this period is detected by detecting the passage of the perforations 102a and 102b of the film 102 by the PR 110 (see FIG. 1). 1 and 8 applied to the camera of this embodiment, when a film having four perforations 102a continuously and one perforation 102b per frame is used like the film 102 of the cartridge 101 shown in FIGS. The number of perforations detected during operation is at least five.

Next, in the photographing process of step S304, the shutter 204 is turned on by the ON signal of the release SW 201 when the photographer presses the release button 116.
The film 1 through the aperture opening 109.
02 is exposed. After the exposure is completed, the film 102 is automatically fed by one frame to prepare for the next exposure. When the photographing is possible, it is checked by the back lid SW 202 whether the back lid 105 is opened ( Step S305).

When the case back 105 is not opened, the photographing is continued. Then, if the film end is detected, the photographing is ended and the film is rewound (steps S306 and 307). After rewinding, the back cover 105 is used to remove the cartridge 101 from the camera.
When the back lid SW202 is opened, the back lid SW202 detects the open state of the back lid (step S308). Further, when the cartridge 101 is taken out from the cartridge chamber 108, the cartridge SW2
03 detects the state where the cartridge is taken out (step S3
09), and the information about the film that has been captured so far is reset (step S310). After that, when the back lid 105 is closed as it is, the back lid SW202 detects the back lid closed state (step S311), and the main photographing sequence is ended.

On the other hand, if it is confirmed that the back cover 105 has been opened by checking the open state of the back cover in step S305, the process jumps to step S313. Therefore, whether or not the Patrone 101 is taken out from the camera is detected by the Patrone SW 203, which is the Patrone detection unit.
To detect continuously.

By continuously detecting the detection of the Patrone SW 203 as described above, even if a new Patrone is quickly loaded, it is possible to detect the new Patrone loading operation. Can be made to perform normal automatic loading operations. Also,
The detection timing of the patrone SW203 is not continuous, and it is shorter than the time required to take out the patrone 101 from the camera and reload it again, or it is checked at intervals that are sufficiently short to check the takeout state of the patrone 101. Even if it is detected, no practical problem occurs.

If it is determined that the cartridge 101 has been taken out, the reset process of step S310 and the following processes are performed. If the cartridge 101 has not been taken out, it waits for the back cover 105 to be closed in that state (step S314). Meanwhile, Patrone 101
If is extracted, the process proceeds to step S310 as described above.

If the closed state is confirmed by the back cover SW202 while the cartridge 101 is not taken out, the process proceeds to step S315, and the feed amount detecting means P is used.
By counting the number of output pulses of R110, it is equal to or longer than the length required for the exposed portion to come off from the position facing the aperture opening 109 of the camera, and
A film feeding amount of a predetermined length less than the length fed by the automatic loading operation is detected, and the film feeding of the feeding length is executed.

FIGS. 7A, 7B and 7C show the exposed and unexposed portions of the film 102 with respect to the feeding amount when the back cover 105 is once opened and closed in a photographable state. In the figure, the shaded portion indicates the exposed portion. 7A shows a state immediately after the film is exposed to light, and FIG. 7B shows a state in which the film is fed by one frame after the exposure.
In this state, the exposed portion is still the aperture opening 10
Depends on 9. FIG. 7C shows a state in which the film has been fed for two frames after exposure, and in this state, the exposed portion does not cover the aperture opening 109.

Here, in the case where the film 102 shown in FIG. 1 or FIG. 8 is applied, the back lid 105 is opened in a photographable state, and the back lid 105 is closed again without taking out the cartridge 101. The relationship between the photosensitive portion of the film and the feeding amount (feeding length) in the case of the above will be described.

First, when the automatic loading operation is performed as in the conventional camera, the automatic loading operation is not completed unless at least five perforations are detected as shown in step 303. Since the minimum five perforations detected when the film is released halfway are all the frame positioning perforations 102b, the film 10 of the minimum five frames is automatically loaded.
2 will be sent. As compared with the feeding of two frames in the state shown in FIG. 7C, three frames are unnecessarily fed.

Therefore, in the present embodiment, the two frames shown in FIG. 7C are designated as the predetermined feeding length to prevent the images from being superposed on the exposed portion of the film and at the same time. Reduce film waste. It should be noted that this predetermined feeding length is the same as that of the cartridge chamber 108 and the aperture opening 10.
It is obvious that the distance from 9 in the film running direction and the number and arrangement of the perforation group 102a for detecting the leader portion of the film 102 and the perforation for frame positioning 102b differ from each other. It is not limited to pieces.

Now, returning to the flow chart of FIG. 6, when the feeding of the predetermined amount in step S315 is executed, the prescribed number of film shots is reached before the feeding length is reached,
If it is detected that the film has ended (step S316), the process jumps to step S306,
The shooting end processing is executed.

When the feeding of a predetermined amount is completed, the number of frames corresponding to the predetermined feeding length, which corresponds to two frames in this embodiment, is displayed on the display panel 111 of the photographing frame number display means in step S305. According to a display method to be described later, the number of displayed imaged frames displayed before the detection of the back cover open state is added or subtracted according to the display method to be displayed, and the process returns to the image capturing process of step S304. When the photographing frame number display means is an addition type frame number display, a predetermined feeding frame number is added to the displayed photographing frame number, and when it is a subtraction type frame number display, it is subtracted and displayed. This allows the photographer to accurately grasp the remaining amount of film.

As described above, according to the camera of the present embodiment, even when the photographer accidentally opens the back cover 105 while waiting for shooting, and the back cover is closed again without taking out the cartridge 101, If the exposed portion has a length equal to or longer than a length required to separate from the position facing the aperture opening 109, which is the photographing opening of the camera, and less than the length fed by the automatic loading operation. Since the film is fed, you can prevent it from being overlaid on the exposed part of the film, and even if you open the back cover during shooting like a conventional camera, it will be automatic like when loading a patrone. It is possible to reduce the waste of the film by sending only the substantially exposed area without loading.

Further, in the present embodiment, the length of the film fed by the automatic loading operation is the length of the film 102 fed from the inside of the cartridge 101 by the rotation of the fork 114 and the length of the winding spool 112. This is the total length of the film 102. Further, since the number of photographed frames corresponding to the fed film 102 having the predetermined length is added to or subtracted from the number of photographed frames displayed before the photographer opens the case back, it is displayed. The photographer can accurately know the remaining amount of the film.

(Appendix) According to the embodiment of the present invention as described in detail above, the following constitution can be obtained. That is, (1) a plurality of leader unit detection perforations formed continuously in the leader unit are formed so that the number and arrangement of the leader unit detection perforation groups are different, and the perforation groups for film detection are made to correspond to each frame of the film. A film having a formed frame positioning perforation stores a cartridge that is wound around a supply spool that is rotatably formed and stored, and the supply spool is rotated in one direction to remove the film from the cartridge. In a camera that stores the film in a cartridge by sending out and rotating the supply spool in the other direction, a back lid for loading the cartridge into the camera, and a state detection means for detecting an open / closed state of the back lid, A cartridge detecting means for detecting whether or not the cartridge is loaded in the camera; The take-up spool for winding the film sent out from the film, the feeding detecting means for detecting the feeding amount of the film, the driving means for driving the take-up spool, and the state detecting means for the photographing enabled state are provided. When the open state of the case back is detected, the patrone detection means continuously detects whether or not the patrone is still loaded in the camera, and detects the state while the patrone is loaded. When it is detected by the means that the back lid is closed, the take-up spool and the feeding detection means are removed from the position where the portion of the film exposed by opening and closing the back lid is opposed to the photographing opening of the camera. And a control means for feeding the film by an amount required for the film and less than the length sent out immediately after the cartridge is loaded in the camera. Camera that.

(2) A plurality of leader unit detection perforations formed continuously in the leader unit, and the number and arrangement of the leader unit detection perforation groups are formed so as to correspond to each frame of the film. A film having a formed frame positioning perforation stores a cartridge that is wound around a supply spool that is rotatably formed and stored, and the supply spool is rotated in one direction to remove the film from the cartridge. In a camera that stores the film in a cartridge by sending out and rotating the supply spool in the other direction, a back lid for loading the cartridge into the camera, and a state detection means for detecting an open / closed state of the back lid, A cartridge detecting means for detecting whether or not the cartridge is loaded in the camera; Film take-up spool for winding the film sent out from the cartridge, feed detecting means for detecting the feed amount of the film, driving means for driving the take-up spool, and state detecting means when the photographing is possible. When the opening of the case back is detected, the patrone detection means
If the Patrone is still loaded in the camera,
When the patrone is repeatedly detected at intervals shorter than the time required to take it out of the camera and reload it, and when the state detecting means detects that the case back is closed with the patrone still loaded, the film The length of time required for the part exposed by opening and closing the back cover to move away from the position facing the shooting opening of the camera, and less than the length sent out immediately after loading the cartridge in the camera, A control means for feeding the film until the means detects the camera.

(3) In addition (1) or (2) above, a fork driven by a motor and controlled by the control means is further provided, and the fork is installed in the cartridge by loading the cartridge into the camera. The control means rotates the supply spool by rotating the fork by engaging the supply spool, and the control means loads the cartridge into the camera by the control means for the length of the film supplied by the automatic loading operation. After that, by detecting the perforation group of the film leader section by detecting the rotation of the fork in one direction and the film feeding amount, the film of the length fed from the patrone, and the control means after the feeding, the film winding of the camera The perforations for frame positioning can be detected by means of the rotation of the spool and the feeding amount of the film. In the camera is a film of total length of the length of the film fed in until the first photographable state.

(4) In any one of the above supplementary notes (1) to (3), in the control means, the back cover state detection means detects the open state of the back cover when the photographing is possible, and then the cartridge. The detection means and the back lid state detection means feed a film of a predetermined length when it is detected that the back lid is closed with the cartridge still loaded, and the film has a predetermined length. Is determined by the feed detecting means detecting a predetermined number of piece positioning perforations, and the number of piece positioning perforations is two or more, and the feed detecting means is in the automatic loading operation. The number of piece positioning perforations is less than the total number of the leader section detection perforations to be detected and the piece positioning perforations.

[0054]

As described above, according to the camera of the present invention, when the photographer accidentally opens the back cover during photographing and closes it again, the back cover is overlapped on the exposed portion of the film and photographed. It is possible to prevent the film from being lost and to minimize the waste of the film.

[Brief description of drawings]

FIG. 1 is a perspective view of a camera according to an exemplary embodiment of the present invention as viewed from the back side with a back cover opened.

2 is a sectional view of a cartridge chamber including a cartridge detection switch of the camera shown in FIG. 1, wherein FIG. 2A shows an unloaded state of the cartridge, and FIG. 2B shows a loaded state of the cartridge. Indicates.

FIG. 3 is a cross-sectional view showing the operating state of the back cover opening / closing mechanism of the camera of FIG. 1 and the hook portion of the camera body, and FIG. 3 (A) is an open state ( B) shows the locked state after closing.

4 is a sectional view of FIG. 3, wherein FIG. 4A is a sectional view taken along the line AA ′ of FIG. 3A, and FIG. 4B is a sectional view of FIG. ) Is a sectional view taken along line BB ′ in FIG.

5 is a block diagram of a control unit of the camera shown in FIG.

6 is a flowchart of a shooting sequence including loading and unloading of a film cartridge in the camera shown in FIG.

FIG. 7 is a diagram showing a photosensitive portion and a non-exposed portion of the film with respect to a feeding amount when the back cover is once opened and then closed in a photographable state, and FIG. 7A is immediately after the film is exposed. 7B shows a state in which one frame of the film has been fed after being exposed to light, and FIG.
The figure shows a state in which pieces have been fed.

FIG. 8 is a diagram showing a leader section detection perforation group applied to a conventional camera and a film cartridge that accommodates a film having frame positioning perforations.

[Explanation of symbols]

 102a ............ Leader detection perforation 102b …………. Piece positioning perforation 105 ……………… Back cover 110 ……………… PR (counting means) 200 ………… … CPU (control means) 202 ……………… Back cover SW (back cover status detection means) 203 ……………… Patrone SW (patrone detection means) 206 ……………… Motor (feeding device)

Claims (4)

[Claims] 1. A leader section detecting perforation group continuously formed in a plurality of leader sections, and the leader section detecting perforation groups are made to correspond to respective frames of the film so that the number and arrangement are different. In a camera in which a cartridge containing a film having a formed frame positioning perforation is loaded, a back lid for loading the above-mentioned cartridge in the camera, and a back lid state detection means for detecting an open / closed state of the back lid. , A cartridge detecting means for detecting whether or not the cartridge is loaded in the camera, and, when the case back is opened and closed while the cartridge is still loaded in the camera, The length required for the part exposed by opening and closing the back cover of the film to come off the position facing the shooting opening of the camera, and
A camera characterized in that the film is fed by an amount smaller than the length fed out immediately after the cartridge is loaded into the camera. 2. A leader section detecting perforation group formed continuously in a plurality of leader sections, and the leader section detecting perforation groups are made to correspond to each frame of the film so that the number and arrangement are different. In a camera in which a patrone containing a film having a formed frame positioning perforation is loaded, a back cover for loading the patrone into the camera and the film when the patrone is loaded in the camera. A feeding device for feeding, a counting means for detecting the feeding state of the film by counting the perforation of the film, and the operation of the feeding device is controlled based on the count value of the counting means. And a control means for controlling the loading of the camera to the camera. Immediately after the initial film feeding, when the count value of the counting means reaches a predetermined value, the feeding device is stopped, and the initial film feeding is completed. During film feeding performed when the back cover is opened and closed, the feeding device is stopped when the count value of the counting means reaches a predetermined value smaller than the predetermined value. A camera characterized by. 3. A numerical addition type photographing frame number display means, wherein the photographing frame number display means opens and closes the back cover after the back cover loaded with the film is opened and closed. The camera according to claim 1 or 2, wherein the number of frames displayed before is added with the number of frames corresponding to the predetermined value for display. 4. A numerical addition type photographing frame number display means is further provided, wherein the photographing frame number display means opens and closes the back lid after the back lid loaded with the film is opened and closed. The camera according to claim 1 or 2, wherein the number of frames displayed before is subtracted by the number of frames corresponding to the predetermined value and displayed.