JP2000321639A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a camera capable of preventing a situation that display for unused film becomes display for already exposed film and further the display for already exposed film becomes the display for unused film or film which is being used when the camera gets abnormal before starting the reading operation of a data disk. SOLUTION: This camera is provided with a film use state detection means 2, a storage means 4, a detection means 3 for detecting the opening/closing state of the cover of a film cartridge chamber, and a film rewinding operation inhibiting means 5. When the abnormality occurs till reading photographing information at the time of loading a film cartridge or in the case of photographing operation, correct film use state display is set under the inhibiting means 5 and the detection means 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera using a film cartridge having display means for displaying a use state such as unused, in use, and used.

[0002]

2. Description of the Related Art U.S. Pat. No. 4,965,600 proposes a film cartridge having a display means for displaying a used state such as unused, in use, and used. In this film cartridge, a flag, which is a use state display member that rotates integrally with the film take-up shaft, is located in a display window portion that indicates unused, in use, used, or the like formed in the film case, The usage state can be displayed, and before shooting, the flag is located in an unused display window.

[0003] A data disk on which information such as the ISO sensitivity of a film and the number of recordable images is recorded in a barcode format is provided on the film winding shaft so as to rotate integrally therewith. By detecting the barcode of this data disc, the use state of the film cartridge can be known from the position of the flag.

On the other hand, in this film cartridge, all the films are stored in a cartridge case,
The flag is locked and unlocked in conjunction with the opening / closing operation of an opening / closing door provided at the entrance of the film. When the film cartridge is loaded into the film cartridge chamber of the camera body, the opening and closing door is driven to open and close by a shaft member for driving the opening and closing door provided in the camera body.
The flag is locked so as to be positioned at a predetermined display window when all the film is stored in the film cartridge, but rotates together with the film winding shaft during the film rewinding operation.

[0005] Therefore, for example, when rewinding a film in the middle of photographing, after the film is completely stored in the film cartridge, the flag reaches the position in use by the bar code of the data disk. Is detected, the drive of the film winding shaft is stopped, and when the film cartridge is taken out of the camera body, the opening / closing door is closed to lock the flag. This allows
When the film cartridge is taken out of the camera body, the use condition of the film can be known.

When the film cartridge is loaded into the camera body, the door is first opened, the film winding shaft is rotated in the rewind direction to read the film information from the bar code on the data disk, and then the film winding shaft is wound up. The automatic loading operation of rotating the film in the direction and feeding the film is started.

[0007] If any abnormality occurs during the feeding of the film during the auto-loading operation, an unused film may be displayed as an exposed state, or the used film may not be exposed. In order to prevent the display of use from occurring, Japanese Patent Application Laid-Open No. 8-328115
There has been proposed a camera disclosed in Japanese Patent Application Laid-Open Publication No. H10-209,878.

[0008] Japanese Patent Application Laid-Open No. 8-328115 discloses that
After the film winding shaft is driven in the rewind direction and the film information is read from the data disk, the use condition of the film is stored in the storage means, and if an abnormality occurs in the film feeding during the auto loading operation, An apparatus for stopping the flag based on the use state of the film stored in the storage means is disclosed.

In recent years, in order to reduce the size and cost of the camera, many cameras have been proposed which perform a film feeding operation, a zoom operation, and the like by switching the output of one motor.

Further, in the case of an abnormality in a recent camera, a power switch, a rewind switch or the like is accepted, an ingress or egress is performed, a return operation is performed, and if the abnormality can be recovered, normal use is enabled. A recovery sequence from the abnormal state is provided.

[0011]

However, the above-mentioned 1
In a camera that switches the output of two motors, if an error occurs in the camera after loading the film cartridge into the camera body and starting the operation of reading the barcode information on the data disk, for example, When the film cartridge is loaded into the camera when the output is in the zoom system, first, a switching operation is performed to switch the motor output. At this switching operation, an abnormality occurs and the rewind switch is accepted and the return sequence is entered. In this case, since the use state of the loaded film cartridge is not read, the flag cannot be stopped at a position corresponding to the loaded film cartridge.

Therefore, an unused film becomes an exposed display and cannot be used, or an exposed film becomes an unused display and can be used again. In the worst case, there is a problem that the exposed film is loaded and double-exposed.

The present invention has been made in view of the above-mentioned problems, and if an abnormality occurs in a camera before starting a data disk reading operation, an unused film may be displayed as an exposed state, It is another object of the present invention to provide a camera capable of preventing an exposed film from being unused or being displayed during use.

[0014]

According to the present invention, there is provided a camera using a film cartridge capable of displaying a use state display in accordance with a use state, wherein a film cartridge chamber cover for detecting the open / close state of a cover of a film cartridge chamber. State detection means, film use state detection means for detecting the use state of the film cartridge loaded in the film cartridge chamber, and storage means for storing the use state information of the film cartridge detected by the film use state detection means A rewinding operation prohibiting unit for prohibiting a film rewinding operation of the film cartridge, a control unit for controlling operations of the film cartridge chamber cover state detecting unit, the film use state detecting unit, and the rewinding operation prohibiting unit. And the control means comprises: When the film cartridge chamber lid state detecting means detects that the lid of the film cartridge chamber has changed from the open state to the closed state, the rewind operation inhibiting means is operated to inhibit the film cartridge rewind operation. Then, immediately before starting the operation of reading the use state of the film cartridge loaded in the film cartridge chamber by operating the film use state detection means, canceling the rewind operation inhibition by the rewind operation inhibition means. Is performed.

Further, the control means of the camera according to the present invention comprises:
When the film cartridge chamber lid state detecting means detects that the lid of the film cartridge chamber has changed from the open state to the closed state, the film cartridge rewind operation inhibiting means is operated to perform the film cartridge rewind operation. After the prohibition and the rewind operation prohibition information are stored in the storage means, the film use state detection means is operated to start the operation of reading the use state of the film cartridge loaded in the film cartridge chamber. At this time, a control for clearing the rewinding operation prohibition information stored in the storage means is performed.

Further, the control means of the camera according to the present invention is characterized in that when the film cartridge chamber lid state detecting means detects that the lid of the film cartridge chamber has changed from the open state to the closed state, the storage means To control the storage of the information that the lid of the film cartridge chamber is closed, and operates the film use state detecting means to start the operation of reading the use state of the film cartridge loaded in the film cartridge chamber. Then, the read use state information of the film cartridge is recorded in the storage means, and control for generating and storing information that the use state information of the film cartridge has been detected is performed. The information that is in the closed state and the information that the use state of the film cartridge has been detected are If not recorded, the rewinding operating controls operation prohibiting means and thereby prohibit the film rewinding operation of the film cartridge.

According to the camera of the present invention, if an abnormality occurs in the camera between the time when the film cartridge is loaded and the time when the use state of the film is read, the rewind operation by operating the rewind switch is prohibited. Therefore, the film use state display when the film cartridge is loaded is maintained without the film winding shaft rotating. As a result, the problem that unused film is displayed as exposed and cannot be used, and that exposed film becomes unused and double-exposure is mistakenly recognized as usable film is eliminated. it can.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to FIGS.

FIG. 1 is a block diagram showing a basic structure of the present invention, FIG. 2 is a perspective view showing a driving mechanism of a film cartridge, FIG. 3 is a perspective view showing a film spool of the film cartridge, and FIG. FIG. 5 is a perspective view showing the case of the film cartridge, FIG. 5 is a plan view showing the upper part of the case of the film cartridge, and FIGS. 6 to 11 are flowcharts for explaining the operation of the camera according to the present invention.

Reference numeral 1 shown in FIG. 1 denotes a CPU (Central 1 Procesing Unit) for controlling the entire camera.
U1 includes a film use state detecting means 2 for detecting a use state of a film cartridge loaded in the camera, a cartridge chamber lid state detecting means 3 for detecting an open / close state of a lid of a cartridge chamber for loading the film cartridge, Storage means 4 for storing the use state information and the like of the film detected by the use state detection means 2; rewind operation prohibition means 5 for prohibiting the film rewind operation of the film cartridge loaded in the cartridge chamber;
The motor drive circuit 7 is connected to a rewind switch (hereinafter referred to as RWSW) 6 which allows a user to operate the film to perform a rewind (rewind) operation. A drive motor 8 is connected to the motor drive circuit 7, and a rotation output of the drive motor 8 is transmitted through a motor output switching unit 9 to a lens frame drive unit 10 that performs a zooming operation of a photographic lens of a camera and the like. Data disk drive means 11 for driving a data disk provided in the film cartridge is connected.

The rewinding operation prohibiting means 5 includes a film cartridge loaded in the cartridge chamber, the cartridge chamber lid state detecting means 3 detecting that the lid of the cartridge chamber is closed, and the film use state detecting means 2
In the event that any operation or operation of the camera is performed before the reading of the use state of the film is started, the rewinding operation is prohibited so that the film spool of the loaded film cartridge does not rotate.
This is to prevent the display of the film use state of the film cartridge from being changed.

Next, the structure of the film feed drive system of the film cartridge used in the camera of the present invention will be described with reference to FIG.
This will be described with reference to FIG. The same parts as those in FIG. 1 are denoted by the same reference numerals.

The gear 8a provided on the rotation shaft of the drive motor 8 is moved by the motor output switching means 9 to a film winding shaft 12 to be described later and to the lens frame driving means 10
(Not shown) and the data disk driving means 11 are selectively switched and meshed, so that the rotation output of the driving motor 8 is supplied. The film 14 stored in the film cartridge 13 is pulled out from the film cartridge 13 and wound around the film take-up shaft 12. The film 14 is provided with a perforation 15 for detecting perforation. The perforation detecting means 1 is provided at a corresponding position where the perforation 15 is provided.
6 are arranged. The data disk drive means 11
Has a fork gear 17 meshing with the motor output switching means 9, and a fixed coaxial tip provided on the fork gear 17 is provided with an engaging member for engaging the film take-up shaft 11 and the film cartridge 13. A mating gear 17a is provided. Further, the data disk reading means 11 has first and second pairs of data reading means 18 and 19 for reading bar code data provided on a data disk described later provided on the film cartridge 13. Is arranged.

Next, the structure of the film cartridge 13 will be described with reference to FIGS. FIG. 3 shows a film spool 20 provided inside the film cartridge 13 and wound around the film 14, and FIG. 4 is a perspective view of the film cartridge 13 shown in FIG. FIG. 5 is a plan view of the film cartridge 13 shown in FIG. 2 as viewed from the direction B in the figure.

The film cartridge 13 includes a film spool 20 shown in FIG.
And a case 27 having a hollow portion for accommodating the film spool 20 shown in FIG.

The film spool 20 shown in FIG. 3 has a cylindrical cartridge shaft 21 and this cartridge shaft 21.
Upper flange 22 and lower flange 23 provided at both ends of
And a flag 2 for displaying a film use state (hereinafter referred to as VEI display) provided on the outer side of the upper flange 22.
4 and a data disk 25 on the outer side of the lower flange 23, on which film information data such as ISO sensitivity of a bar code film and data on the number of recordable images are described. Notch 2 with no bar code data (quiet zone)
5a. The lower flange 23
And a central portion of the data disk 25, which is integrally formed with an engagement hole 26 which is in communication with the cartridge shaft 21 and into which the engagement gear 17a of the fork gear 17 is inserted and engaged. I have.

As shown in FIG. 4, the case 27 has a substantially cylindrical shape and has a hollow portion (not shown) for accommodating the film spool 20, and a film outlet provided on a side surface of the case 27. 28, and a first and second bar code reading window 2 for reading bar code data on a data disk 25 described later on the bottom surface of the case 27.
9 and 30, and the engagement port 2 of the film spool 20
6, the engagement gear 17 of the fork gear 17
a is formed from the insertion port 31 into which the “a” is inserted. The first and second data reading means 18 and 19 are arranged opposite to the first and second bar code reading windows 29 and 30.

As the first and second data reading means 18 and 19, photoreflectors for transmitting and receiving light for transmitting and receiving barcode data are used. Also,
A film storage space (not shown) is formed between the case 27 of the film cartridge 13 and the upper and lower flanges 22 and 23 of the film spool 20, and the film 14 is wound.

Further, a VEI information flag 24 of the film spool 20 is displayed on the upper surface of the case 27 of the film cartridge 13 as shown in FIG.
EI display windows 32 to 35 are provided, and a round VE
The I display window 32 is in an unused state, and is a semi-circular VEI display window 3.
3 is in use (taken out during use), x shape VE
The I display window 34 is in an exposed state, and has a rectangular VEI display window 3.
Reference numeral 5 denotes a developed state. Reference numeral 31 ′ at the center of the upper surface of the case 27 is an insertion port communicating with the insertion port 31 on the lower surface of the case 27 in FIG. 4 via the cartridge shaft 21 of the film spool 20.

The VEI display windows 32 to 35 stop the film spool 20 and lock the film spool 20 by a lock mechanism (not shown) of the cartridge shaft 21 which is interlocked with the opening and closing of the film drawing port 28. At the position where the flag 24 stops at any of the VEI display windows 32 to 35 at the time of locking, the use state of the film cartridge 13 can be visually confirmed.

The film 14 is fixedly wound around the cartridge shaft 21. By rotating the film spool 20, the film 14 is sent out from the film cartridge 13 or rewound.

The VEI display window 3 of the flag 208 according to the use state of the film cartridge 13 according to the rotational positional relationship between the bar code data of the data disk 25 and the quiet zone of the notch 25a.
Positions from 2 to 35 are set.

The VEI information flag 24 and the VEI
The relationship between the display windows 32 to 35 will be described.

When the fork gear 17 is driven by the drive motor 9 shown in FIG. 2 through the motor output switching means 11 to rotate the film spool 20 in the rewinding direction, the film spool 20 and the data disk 2 are rotated.
5 rotates integrally, and the first data disk reading means 18 and the second data disk reading means 19 start reading data from the data disk 25.

Notch 25 of data disk 25
a from the quiet zone provided in a.
The VEI information is detected and determined by counting the number of edges of the barcode data detected by the data reading means 18 and 19.

Further, the first data reading means 18
In accordance with the pattern of the par code data detected by the second data reading means 19, the ISO of the film and the information on the number of shots are detected.

In order to set the VEI information, the storage means 4 is determined based on the number of edges of bar code data detected by the first and second data reading means 18 and 19 from the quiet zone of the data disk 25. The drive of the drive motor 9 is controlled so that the flag 24 stops at a position opposing the VEI display position data stored in the drive motor 9.

Next, the operation of the embodiment of the camera according to the present invention will be described with reference to FIGS.

When an operation power switch (not shown) of the camera shown in FIG. 1 is turned on, drive power is supplied from a power source such as a battery which is an operation drive source of various drive mechanisms of the camera.
The various driving mechanisms are set in a driving state. When the driving power is supplied, the various driving mechanisms are initialized (indicated as “mechanical initialization”) in step S1 of the flowchart shown in FIG. Note that in this step S1,
If the drive mechanism has already been recognized as being in the initial state, no new initialization is performed, and the current operation state of the drive mechanism is maintained. Next, in step S2, a memory area built in the CPU 1 is cleared (described as RAM clear).
Then, in step S3, information necessary for controlling the driving mechanism of the camera preset in the storage means 4 is read. Here, a processing operation mode for monitoring the loaded state of the film cartridge 13 in the camera (in the figure, denoted by PWRBK)
This will be described with reference to FIG. In step S4, the open / closed state (denoted as F_BKSWJ) of the lid of the card cartridge room of the film cartridge storage room of the camera at the present time detected by the cartridge room cover state detection means 3 is determined. The opening / closing information of the lid of the cartridge chamber is based on the processing (PW
RBK), and if it is determined that the lid of the cartridge chamber is open, the process proceeds to step S44.
If it is determined that it is closed, the process proceeds to step S5. If it is determined in step S4 that the lid of the cartridge chamber is closed, in step S5, the open / closed state (denoted as F_EPBKJ) of the force-trigger chamber lid before the current time is determined. If the lid of the cartridge chamber is in the open state before the current time, the process proceeds to step S13.
Before the current time, if the film cartridge 13 is in the closed state, the process proceeds to step S6, and it is determined whether or not the film cartridge 13 loaded in the cartridge chamber is in the rewinding operation (denoted as rewinding). As a result of the determination in step S6, if it is determined that the rewinding operation is being performed, the process proceeds to step S41 to continue the rewinding operation. If it is determined that the rewinding operation is not performed, the cartridge is stored in the cartridge chamber in step S7. It is determined whether or not the film being wound is being automatically wound (indicated as "auto-loading"). If the result of determination in this step S7 is that the automatic winding operation is in progress, the film use state information is set to unused (DEPCODE ← 00) in step S28, and step S4
Move to 1. As a result of the determination in step S7, if it is determined that the film is not being automatically wound, the barcode data as the film information displayed on the film cartridge 13 is being read (in step S8). If the barcode data of the film information is being read, the film use state information is set to used (exposed) in step S29 (DEPCODE ← 10), and the process proceeds to step S41. I do. If it is determined in step S8 that the bar code data reading operation is not being performed, in step S9, the film is not loaded in the camera due to the demonstration of the camera at a store or the like provided in the camera. In this state, it is determined whether or not an operation mode in which the shutter, the zoom drive, and the like are movable (hereinafter, referred to as a demo mode) is being executed. If it is determined that the demonstration mode is being executed as a result of the determination in step S9,
Move to step S50. If it is determined in step S9 that the demonstration mode is not being executed, step S1 is executed.
At 0, it is determined whether or not the winding operation is being performed (indicated as winding). If the winding operation is being performed, the process proceeds to step S30 to continue the winding operation. In this step S30, the fact that a reset has occurred during the film winding operation (denoted as F_EPOWRST ← 1) is stored in the storage means 4 in step S31, and the film winding process is continued in step S32 (denoted as MGNOWIND).
In step S33, it is determined whether or not it is a film end (denoted as F_FILMEND). If it is not a film end, the process proceeds to step S50. If it is a film end, the film use state information is exposed in step S34. (Denoted as DEPCODE ← 10), and the routine goes to Step S41. If it is determined in step S10 that the winding operation is not being performed, step S10 is performed.
At 11, it is determined whether the film is loaded in the camera. If it is determined in step S11 that the film is loaded, the process proceeds to step S50. If it is determined that the film is not loaded, the rewind completion flag is set to 1 in step S12, and the camera is reset. Is set so as to select a mode in which does not operate, and the process proceeds to step S50.

Next, in step S5, if the lid of the cartridge chamber was open before the current time, it is determined that the lid of the cartridge chamber has been closed at the current time, and FIG.
The process proceeds to step S13 shown in FIG. Step S13
Then, the information (F_RWDI = 1) for prohibiting the rewinding operation is set by the rewinding operation prohibiting means 5, the rewinding prohibition information is stored in the storage means 4 in step S14, and the switching is performed in step S15. Mechanical drive is performed, and the motor output switching means 9 is connected to the data disk drive means 1.
1 is switched to driving. Next, in step S15-1, the prohibition of the rewind operation is released, and information (F_R) indicating the release is displayed.
WDI = 0) is set and stored in the storage means 4 in step S15-2. Next, in step S16, the barcode data of the photographing information displayed on the data disk 25 of the film cartridge 13 is read (BAR
The VEI information obtained from the bar code data is converted into film information (denoted as DEPCODE) in step S17, and stored in the storage means 4 in step S18.

The film cartridge 13 loaded in the cartridge chamber is exposed in step S19 (DEPC).
ODE = 10) or developed in step S20 (D
It is determined whether EPCODE = 11) or in the middle of photographing (depicted as DEP01) in step S23. If it is determined in step S19 that exposure has been completed and in step S20 that development has been completed, FIG. The flow shifts to step S29 to set the film use state information to "exposed", and shifts to step S41. If it is determined in step S23 that the film is being shot, the process proceeds to step S40 in FIG. 6, and the film use state information is shot (DEPCODE).
(Indicated as ← 01) and the process proceeds to step S41.

Further, in step S21, it is determined whether or not the film cartridge 13 is loaded in the cartridge chamber, and if it is determined that the cartridge is not loaded,
In step S26, the demo mode flag is set (F_DEMO ←
1) and the process proceeds to step S50.

In step S22, the presence or absence of a barcode data error (denoted as F_BARER) is determined in the reading result of the barcode data of the film information displayed on the film cartridge 13 loaded in the cartridge chamber. If there is an error in the barcode data, the flow shifts to step S29 to determine that the film use state information has been exposed.

Further, the film cartridge 13 loaded in the cartridge chamber is determined to be unused in the steps S19, S20 and S23,
If no error is detected in the bar code data in step S22, an automatic load operation (ALOAD) is performed in step S24 to load the film to a predetermined position in the camera using a film feeding means (not shown).
Notation). Next, in step S25, it is determined whether the auto-load operation has succeeded or an error has occurred. If the auto-load error has been confirmed, the film use state information is set to unused (DEPCODE ← 00) in step S28. Then, the process proceeds to step S41, and if it is determined that the automatic loading is successful, the process proceeds to step S50.

Next, the operation from step S35 to step S39 in FIG. 8 will be described.
It is determined whether or not a reset (denoted as F_EPOWRST) such as the attachment / detachment of a battery has occurred during the winding operation. When the reset has occurred, the film use state information is set to the exposed state (DEPCODE ← 10) in step S27, and the process proceeds to step S41. If the reset has not occurred, it is determined in step S36 whether rewinding at the film end or rewinding by rewinding operation (F_
When the film is rewound at the film end, the process proceeds to step S27, and when the film is rewound by the rewind operation, the photographed state detected by the film use state detecting means 2 is detected at step S37. Based on the frame number count data, it is determined whether the film is an unused film or a film being photographed. If not, the VEI information is not used (DEPCODE ← 0) in step S38.
0), and if shooting is in progress, step S
In step 39, VEI information is set during shooting (DEPCODE ←
01) and the process moves to step S41.

Next, returning to FIG.
Correspond to steps S27, S28, S29, S34, S
The VEI information and the like from 38, S39, and S40 are stored in the storage means 4, and in step S41-1 the motor output switching means 9 is switched to be connected to a rewind mechanism (not shown), and in step S42, A rewind operation to be described later is performed. Next, in step S43,
In order to prevent the camera from performing unnecessary operations other than the rewind operation, rewind completion setting is performed.

If it is determined in step S4 that the lid of the cartridge chamber is open, the rewind completion setting is canceled in step S44 so as to cope with various operations of the camera, and the demo mode is canceled in step S45. Then, control goes to a step S50.

Next, the processing operation after step S50 will be described with reference to FIG.

In step S50, the state of switches of various operation modes provided in the camera is read, and the operation of the switch of the driving power supply of the camera will be described as an example. A step S51 detects a change in the drive power switch. When the operation of the drive power switch is changed to ON or OFF, the process shifts to step S1 to execute the processing after step S1. If there is no change in the operation of the drive power switch, it is determined in step S52 whether the drive power switch is on or off. If the drive power switch is off, the drive power switch (not shown) is turned off. . This drive power-off process is not particularly related to the present invention and is omitted, but is a mode in which current consumption is reduced.

If the drive power switch is on, the motor output of the motor output switching means 9 is switched to the lens frame driving means 10 in step S52-1, and the lens frame is moved to a position where the lens frame can be photographed in step S53. Extend (ZM
WID). Next, in step S54, the operation of the switches in the various operation modes of the camera is read again, and in step S55, a change in the drive power switch is detected. If the operation of the drive power switch changes,
The process proceeds to step S1, and if there is no change in the operation of the drive power switch, the on / off state of the drive power switch is detected in step S56. The process is performed, and when it is in the ON state, detection and determination of a change in rewind is performed in step S57. As a result of the determination of the change in the rewind SW in step S57, if there is a change,
Move to 35. If there is no change in rewind,
In step S58, a change in the current state of the lid of the cartridge chamber is detected. If there is a change in the lid of the cartridge chamber in this step S58, the process proceeds to step S4, and if there is no change, it is determined in step S59 whether or not the rewind has been completed. If it is determined in step S59 that the rewind has been completed, the process returns to step S54. If the rewind has not been completed, steps S60 and S60 are performed.
At 61, it is determined whether or not the zoom operation switch is operated. In the figure, ZUSW is a zoom-up switch, and ZDSW is a zoom-down switch. When these zoom switches are turned on, the motor output switching means 9 is switched to drive the lens frame driving means 10 in step S62-1, and the zoom up and zoom down switches are respectively responded in step S63. A zoom operation is performed, and step S5 is performed.
Return to 4. If the zoom switch is off, it is determined in step S62 whether or not a release switch (denoted as 1RSW) has been operated. If the release switch has been operated, in step S64, the operation is performed according to the operation of the release switch. Release processing is performed. Since the release process does not have any relation to the present invention, a detailed description thereof will be omitted.
When the release switch is operated, exposure processing with a predetermined lens opening and shutter speed and winding of the film after this exposure processing are performed. At the time of winding the film after the exposure, it is determined whether or not the film is the end, and in the case of the film end, F_FILMEND = 1 is set, the determination is performed in the step S65, and the process proceeds to the step S35. In step S5
Return to 4. If it is determined in step S62 that the release switch has not been operated, the process returns to step S54.

The operation when any abnormality occurs during the operation of the camera will be described with reference to FIG.

In the abnormal processing, in step S101, a setting is made to initialize the various driving mechanisms of the camera (F_MC
INIRQ = 1). Next, step S
A drive power switch (not shown) in 102, S103, and S104;
And reading of the RWSW6. Next, it is determined in step S105 whether or not the drive power switch has changed. If there has been a change, the process proceeds to step S1, and if there has been no change, it is determined in step S106 whether or not rewinding is prohibited. . If rewinding is prohibited (F_RWDI = 1), step S108
And rewind is not prohibited (F_RWDI =
In the case of (0), it is determined in step S107 whether the RWSW 6 has been operated. In step S107, the R
If it is determined that the WSW 6 has been operated, the process proceeds to step S35. If it is determined that the RWSW 6 has not been operated, it is determined in step S108 whether the cartridge chamber lid state detecting means 3 has changed. .
When a change is detected by the cartridge chamber cover state detecting means 3, the process proceeds to step S4, and when there is no change in the cover state, the process returns to step S105. Thus, when an abnormality occurs, the drive mechanism is initialized according to the operation of the drive power supply, the RWSW 6, and the cartridge chamber cover state detecting means 3, and it is possible to recover from the abnormal state.

Next, the rewinding operation will be described with reference to FIG.

When the process of rewinding the film of the film cartridge 13 is started, the motor 8 is started to rotate in the rewinding direction in step S121, and whether the leading end of the film is detected in step S122 is determined. Judge. Various methods have been disclosed for the method of detecting the leading edge of the film, but any method may be used. When the leading end of the film is detected in step S122, a timer (not shown) built in the camera is started in step S123, and the leading end of the film is securely stored in the case 27 of the film cartridge 13 in advance. Is compared with the predetermined film rewind time set in step S124. If it is confirmed at step S124 that the predetermined time for rewinding has elapsed, at step S125 the flag 24 of the film cartridge 13 is set to the VEI display windows 32 to 35 based on the VEI information stored in the storage means 4. The motor 8 is stopped at step S126 and the process is terminated.

As described above, in one embodiment of the present invention, the rewind operation is prohibited immediately after the lid of the cartridge chamber is closed, and the rewind operation is prohibited immediately before the data disk reading operation. When the camera cartridge is loaded with the film cartridge 13 and the lid of the cartridge chamber is closed until the data disc reading operation is started, the camera malfunctions and the processing proceeds to the abnormality processing routine. By preventing the rewinding operation, it is possible to prevent the film spool from accidentally rotating to prevent the unused film from displaying the exposed display or the exposed film from displaying the unused display. Will be possible.

Another embodiment of the present invention will be described with reference to FIGS.

The processing operation of each step in FIG. 12 is the same as the processing operation of each step shown in FIG. 6 except that the step codes in FIG.
The description of the processing operation of those steps is omitted. FIG.
6 is different from the processing operation of FIG.
Through S445-1. In step S404, the cartridge chamber lid state detecting means 3 detects the current open / closed state of the cartridge chamber lid,
If it is determined that the lid of the cartridge chamber is open, in step S443-1, the film use state detecting means 3
(F_BARRDD ← 0) indicating that the film use state information has been read by the user is cleared, and step S443-2 is performed.
With the information that the lid of the cartridge chamber is open (F_FPB
KJ ← 0). Next, in step S444, the setting of rewind completion is released so as to cope with various operations of the camera, and in step S445, the demo mode is released. Next, in step S445-1, step S44 is performed.
The contents from 3-1 to S445 are stored in the storage means 4.

Next, the processing operation of each step in FIG. 13 is the same as that in each step shown in FIG.
13 are shown by attaching reference numerals in the 400s to the reference numerals of FIG. 13 differs from FIG. 7 in the processing operations of steps S413 to S415-2. If it is determined in step S405 that the open / closed state of the lid of the cartridge chamber before the current time point is the open state, in step S413, the information is converted into information that the lid of the cartridge chamber is closed (denoted as F_EPBKJ ← 1). Then, it is stored in the storage means 4 in step S414.
Next, in step S415, the motor output switching means 9 is switched, and the data disk drive means 11 is driven. In step S415-1, the film use state information is already determined based on the barcode data of the data disk 25. A setting that has been read (denoted as F_BARRDD ← 1) is made, and stored in the storage means 4 in step S415-2.

Next, since the processing operation of each step in FIGS. 14 and 15 is the same as the processing operation of each step shown in FIGS. 8 and 9, the reference numerals in FIGS. 14 and 15 are shown, and the detailed description is omitted.

The processing operation at the time of abnormality will be described with reference to FIG. The processing operations of steps S501 to S505 are the same as steps S101 to S105 of the abnormal time processing shown in FIG. Step S50
It is determined in step S5 whether or not the drive power switch has changed. If the drive power switch has not changed, the open / close state of the lid of the cartridge chamber is determined in step S515. If it is determined that the lid of the cartridge chamber is open (F_EPBKJ = 0), the process proceeds to step S507 and is closed (F_EPBKJ = 1).
Is determined, the process proceeds to step S516, and the process proceeds to step S5.
At 16, it is determined whether or not the use state information of the film has been read. If the use state of the film has not been read (F_BARRDD = 0), the process proceeds to step S507, and if read (F_BARRDD = 1), the process proceeds to step S506. Steps S506 and S507 are the same as those in FIG.
0, which are the same as steps S107 and S108, and a description thereof will be omitted.

Steps S521 to S526 of the rewinding operation shown in FIG. 17 are the same as steps S121 to S126 of the rewinding operation shown in FIG.

As described above, according to another embodiment of the present invention, when the lid of the cartridge chamber is closed,
When the reading of the film use state is not performed, the operation of the RWSW 6 is not detected, and the reading operation of the data disk is performed after the film cartridge is loaded in the camera and the lid of the cartridge chamber is closed. If the camera malfunctions before the start of the operation, the film spool is rotated carelessly by not performing the rewind operation in the error handling operation, and the unused film is exposed. It is possible to prevent a display or an exposed film from becoming an unused display.

The present invention is not limited to the configurations of these embodiments, but may be any configuration that can achieve the functions described in the claims or the functions of the configurations of the embodiments. Needless to say.

[0064]

According to the present invention, in a camera using a film cartridge having a use state display function, the photographing information displayed on the film cartridge can be reliably read. This has the effect of reliably preventing a film from being erroneously changed to an unused display and an unused film from being erroneously changed to an exposed display.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of a camera according to the present invention.

FIG. 2 is a perspective view showing a driving mechanism of a film cartridge of the camera according to the present invention.

FIG. 3 is a perspective view showing a film spool of a film cartridge used in the camera according to the present invention.

FIG. 4 is a perspective view showing a case of a film cartridge used in the camera according to the present invention.

FIG. 5 is a plan view showing an upper part of a case of a film cartridge used in the camera according to the present invention.

FIG. 6 is a flowchart illustrating the operation of an embodiment of the camera according to the present invention.

FIG. 7 is a flowchart illustrating the operation of an embodiment of the camera according to the present invention.

FIG. 8 is a flowchart illustrating the operation of an embodiment of the camera according to the present invention.

FIG. 9 is a flowchart illustrating the operation of the embodiment of the camera according to the present invention.

FIG. 10 is a flowchart illustrating an operation of the camera according to the embodiment of the present invention when an abnormality occurs.

FIG. 11 is a flowchart illustrating an operation of the camera according to the embodiment of the present invention when the film is rewound.

FIG. 12 is a flowchart illustrating the operation of another embodiment of the present invention.

FIG. 13 is a flowchart for explaining the operation of another embodiment of the present invention.

FIG. 14 is a flowchart illustrating the operation of another embodiment of the present invention.

FIG. 15 is a flowchart illustrating the operation of another embodiment of the present invention.

FIG. 16 is a flowchart illustrating an operation at the time of abnormality in another embodiment of the present invention.

FIG. 17 is a flowchart illustrating an operation of rewinding a film according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... CPU 2 ... Film use state detection means 3 ... Cartridge chamber lid state detection means 4 ... Storage means 5 ... Rewind operation inhibition means 6 ... Rewind switch 7 ... Motor drive circuit 8 ... Motor 9 ... Motor output switching means 10 ... Lens frame driving means 11 ... Data disk driving means

Claims (3)

[Claims] 1. A camera using a film cartridge capable of displaying a use state display according to a use state, wherein: a film cartridge chamber cover state detection means for detecting an open / close state of a film cartridge chamber cover; Film use state detection means for detecting the use state of the loaded film cartridge; storage means for storing the use state information of the film cartridge detected by the film use state detection means; and film rewinding operation of the film cartridge Control means for controlling the operation of the film cartridge chamber lid state detecting means, the film use state detecting means, and the rewinding operation prohibiting means, wherein the control means comprises: Detecting means for detecting the state of the film cartridge chamber lid When it is detected by the step that the lid of the film cartridge chamber has changed from the open state to the closed state, the rewinding operation prohibiting means is operated to prohibit the rewinding operation of the film cartridge, and then the film use is stopped. Immediately before starting the operation of reading the use state of the film cartridge loaded in the film cartridge chamber by operating the state detection means, control for canceling the inhibition of the rewind operation by the rewind operation inhibition means is performed. And the camera. 2. The rewinding operation prohibiting means, when the film cartridge chamber lid state detecting means detects that the film cartridge chamber lid has changed from the open state to the closed state, by the film cartridge chamber lid state detecting means. After the operation, the rewind operation of the film cartridge is prohibited, and the rewind operation prohibition information is stored in the storage unit.
When the operation of reading the use state of the film cartridge loaded in the film cartridge chamber is started by operating the film use state detection means, the rewind operation inhibition information stored in the storage means is cleared. The camera according to claim 1, wherein control is performed. 3. The film cartridge chamber is stored in the storage means when the film cartridge chamber lid state detecting means detects that the lid of the film cartridge chamber has changed from the open state to the closed state by the film cartridge chamber lid state detecting means. Of the film cartridge loaded in the film cartridge chamber is started, and the read operation is performed. The use state information of the film cartridge is recorded in the storage means, and the control is performed to generate and store the information that the use state information of the film cartridge has been detected. When information and information that the use state of the film cartridge has been detected are not recorded 2. The camera according to claim 1, wherein the operation of the rewinding operation prohibiting means is controlled to prohibit the film rewinding operation of the film cartridge.