JPH10123605A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To judge which operation is being done when a camera performs transfer action of a film by changing display contents during a usual rewinding and during a feed from a film cartridge taken out halfway to the first unexposed frame. SOLUTION: When a film cartridge loaded in a camera judges that a film having exposed frames and unexposed frames was taken out halfway, it feeds automatically the film from the film cartridge to the first unexposed frame. At this time, an LCD of this camera changes contents of display during a usual rewinding and during a feed from the film cartridge taken out halfway to the first unexposed frame. As a result, a user can judge whether the cartridge is during a usual rewinding or during setting of the unexposed frames.

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, when a film cartridge containing a film having an exposed frame and an unexposed frame is loaded and taken out halfway, the first unexposed frame is removed from the film cartridge. To a camera that automatically feeds films up to

[0002]

2. Description of the Related Art In recent years, a new photographic film in which a magnetic layer is formed on one side of a silver halide film has been proposed (USP5).
No. 130745), a film cartridge for accommodating the film, and a camera for photographing using the film cartridge have also been developed, and have been standardized worldwide.

As shown in FIGS. 8 (a) and 8 (b), a cartridge roll film 100 of a new standard has a spool 1 in a substantially cylindrical cartridge case 101 having a light shielding structure.
02 is stored in the film 103,
A light-shielding cover 104 is provided at one end of the cartridge case 101, and the film 103 is always kept in the cartridge case 1 when the camera is not loaded or taken out of the camera.
The light shielding cover 104 completely protects it from external light.

At the side end of the cartridge case 101, a data disk 105 which rotates together with the spool 102 is provided.
Is provided on the outer surface of the data disk 105.
A bar code indicating film information such as the type of the film 103, the film sensitivity, and the number of frames that can be shot is printed in advance. Further, the other side end of the cartridge case 101 has holes 111, 11 of circles, squares, crosses, and half moons.
2, 113 and 114 are bored, and a white tongue (not shown) that rotates integrally with the spool 102 is provided on the back side of these holes, and according to the stop position of the tongue. , A circle, a square, a cross, and a half moon are displayed in a so-called outline.

[0005] The white circles indicate the cartridge case 10.
Indicates that the film in 1 is unexposed (unexpose
d), a white square mark indicates that the film has been developed, a white cross mark indicates that the film has been exposed and has not been developed (exposed), and a white half moon mark has not been developed on the film. It is specified that the exposure frame remains (partial). This outline display is VEI (visual e
It is called xposure index), and you can check the usage of the film by looking at these displays from the outside.

In the film 103, a silver salt photosensitive layer is applied to the front surface 103F of the film base, and a magnetic recording layer is applied to the back surface 103R. Also, film 103
A plurality of perforations 121, 121... That define the range of each photographing frame 120 are formed at the edge of the magnetic recording areas 124, 125 at the upper and lower ends of each photographing frame. It is possible to magnetically record distance, other shooting information, and information of a user message such as a photo title.

When a cartridge film having such a structure is loaded into a camera, an optical reading mechanism in the camera reads bar code information on a data disk 105, and
By detecting the position of the tongue piece, the film information and the usage information are automatically recognized. In the case of a cartridge film in which unused or unexposed frames remain, the light shielding cover 104 is opened and the spool 102 is opened. By rotating the film 103 in a predetermined direction, the film 103 is automatically fed up to the first photographing frame.

When photographing is completed for all photographing frames of the film 103, a rewind mechanism in the camera winds the film 103 into the cartridge case 101, closes the light shielding cover 104, and furthermore,
By stopping the tongue piece integrally fixed to 2 in opposition to the cross-marked hole, an exposed white display (cross-mark) is performed.

When a rewind operation is forcibly performed in the middle of photographing with unexposed frames remaining, a rewind mechanism in the camera winds the film 103 into the cartridge case 101, closes the light shielding cover 104, Further, by stopping the tongue piece integrally fixed to the spool 102 so as to face the hole of the half moon mark, a white display indicating that unexposed frames remain is displayed.

On the other hand, if the loaded cartridge has been exposed or developed, it is determined that photographing is impossible, and processing such as not performing the automatic feeding is performed. In such a camera, the film cartridge can be taken out of the camera by forcibly rewinding the film while the unexposed frames remain (hereinafter, this film cartridge is referred to as a film cartridge taken out in the middle), and the film taken out in the middle is taken out. When the cartridge is reloaded into the camera, the information on the magnetic recording layer is read by the magnetic head in the camera, and the film is fed to a portion where no magnetic information is recorded, so that re-photographing from an unexposed frame can be performed. It has become.

[0011]

However, in the camera of the above-mentioned new system, the display contents of the liquid crystal display (LCD) during normal rewinding and the feeding from the film cartridge taken out halfway to the first unexposed frame. LC in
Since the display contents of D are the same, the film is currently being conveyed. However, there is a problem that it is not known whether the film is being rewinded or an unexposed frame is being set in the film cartridge taken out halfway.

The present invention has been made in view of such circumstances, and has as its object to provide a camera capable of recognizing whether during normal rewinding or during feeding from a film cartridge to the first unexposed frame. And

[0013]

According to the present invention, in order to achieve the above-mentioned object, a film cartridge loaded in a camera is taken out of the way in which a film having an exposed frame and an unexposed frame is stored. Is determined, the camera automatically feeds the film from the film cartridge to the first unexposed frame. The display contents during normal rewinding and the feeding from the film cartridge taken out halfway to the first unexposed frame are performed. Display means is provided for changing and displaying the display contents being sent, and the display contents on the display means make it possible to identify whether a normal rewind or an unexposed frame is being set.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the camera according to the present invention will be described below in detail with reference to the accompanying drawings. FIG.
1 shows a configuration of a camera according to an embodiment of the present invention. This camera uses the cartridge roll film of the new standard shown in FIG. 8, and a winding command is input from the microcomputer 2 to the motor driver 3 each time shooting is completed, and the motor 5 built in the spool 4 is driven. Driven. By the rotation of the motor 5, the spool 4 rotates in the film winding direction via the drive transmission mechanism 6, and the feeding of the photographic film 7 is started. Thus, the photographic film is pulled out from the cartridge 8 and wound up on the spool 4.

The drive transmission mechanism 6 can also rotate the spool 8a of the cartridge 8. Immediately after the cartridge 8 is loaded, the drive transmission mechanism 6 drives the spool 8a in the direction of sending out the film to move the photographic film 7 to the leading end. Send out from. Thereafter, when the leading end of the photographic film 7 winds around the spool 4 and the rotation of the spool 4 causes the photographic film 7 to be fed at a speed higher than the sending speed by the rotation of the spool 8a on the cartridge 8 side, the cartridge The spool 8a on the side 8 rotates following the feeding of the film.

In this way, the film leader is
When the first frame is sent to the shooting position, the motor 5 stops. At the time of rewinding, the motor 5 rotates in the reverse direction to drive the spool 8a on the cartridge 8 side in the film winding direction, and the spool 4 is driven to rotate. Then, the photo film 7 is completely wound into the cartridge 8 up to the leading end.

In the photographic film 7, two perforations 7a and 7b are formed for each frame. In particular, for the first frame, one more perforation is provided on the leading end side of the film with respect to the perforation 7a. A reflection type photo sensor 9 faces the pass band of these perforations.
Is input to the PF pulse generator 10.
The PF pulse generator 10 outputs a pulse signal every time the perforations 7a and 7b pass through the front surface of the photo sensor 9. This pulse signal is input to the microcomputer 2.

After receiving the photographing completion signal, the microcomputer 2 drives the motor 5 via the motor driver 3 to start film feeding. Then, when the photo sensor 9 detects the perforation 7a on the leading side of the film, the feeding of the film is stopped and the feeding of one frame of the film is completed. A transparent magnetic recording layer is formed on the entire back surface of the photographic film 7, and the magnetic head 12 is driven during the period in which one frame of the film is being fed. Exposure information and the like are magnetically recorded in a predetermined magnetic recording area 11 for each photographic frame. When recording this information, all characters and numbers that constitute the information are 2
The binary code is converted into a value code and digitally recorded.

The recording / reproducing circuit 15 generates data pulses having different duty ratios in accordance with a recording signal supplied from the microcomputer 2 during recording. Based on this data pulse, magnetic recording is performed by the magnetic head 12 in the form of binary codes “1” and “0”. When performing this magnetic recording, the encoder 16 and the ENC pulse generator 17 are used so that the unit bit length does not change under the influence of the film feeding speed. The encoder 16 is composed of an encoding plate 16a in which slits are formed radially at a constant pitch on a disk that rotates following the feeding of the photographic film 7, and a photo interrupter 16b that photoelectrically detects the passage of the slits.
A photo-electric signal that fluctuates in synchronization with the feeding speed of the photo film 7 is output from the photo interrupter 16b. This photoelectric signal is shaped by the ENC pulse generator 17 and input to the microcomputer 2 as an encode pulse synchronized with the film feeding speed. For example, the encoding plate 1
One rotation of 6a generates 256 encode pulses. The encoding plate 16a rotates three times during the feeding of one frame of film.

At the time of magnetic recording, the microcomputer 2
Sends a recording signal to the recording / reproducing circuit 15 while monitoring the interval of the encode pulse,
Reverses the magnetic field generated by the magnetic head 12 at a timing corresponding to the binary code "1" or "0" in the unit bit length of the magnetic recording based on the recording signal. Also,
The microcomputer 2 reads data of a reproduction signal from an A / D port in synchronization with the encode pulse during magnetic reproduction.

The memory 18 shown in FIG. 1 has a ROM area and a RAM area, in which the above-described magnetic recording is executed, or a sequence for reading magnetic information from the magnetic recording area 11. A program is stored, as well as data for converting information to be magnetically recorded into a binary code. The RAM area is used for temporarily storing data and flags when performing a magnetic recording / reproducing process.

FIG. 2 is a rear view of the camera. As shown in the figure, a power switch 13A, a mode switch 13B, a CHP switch 13C for designating a print format (standard, high definition, panorama), and a liquid crystal display (LCD) 14 are provided on the back of the camera. A rewind switch 13D and the like are provided on the back surface of the side cover. The microcomputer 2 performs a process corresponding to the switches 13 and an LCD.
14 is displayed.

FIG. 3 is an enlarged plan view showing the details of the LCD 14. As shown in FIG.
It has a 6-digit date display section 14A in which a number can be displayed by a segment, and a 2-digit film counter section 14B. The 6-digit date display section 14A displays the date or time, or the film type and ISO sensitivity, and displays the 2-digit film counter section 14B.
Indicates the number of frames that have not been shot (remaining number) or the frame number.
The display of the film type is blank for a negative film, "P" for a reversal film, "b" for a black-and-white film, and "o" for other films. . The LCD 14 is also capable of displaying the presence or absence of a film cartridge, whether or not the camera is in a self-photographing mode, whether or not a remote control mode, whether or not flash photography, and the remaining battery power.

Next, the operation of the above-configured camera will be described with reference to the flowchart shown in FIG.
When the film cartridge 8 is loaded in the camera, first, the DEP / DD control is performed (step S11, hereinafter, only step numbers are shown). In this process, the barcode of the data disk provided in the loaded cartridge 8 is read by the optical reading unit, and information such as the ISO sensitivity, the film type, and the total number of frames is obtained (DD control). The use state of the loaded cartridge 8 is detected by detecting the position of the tongue piece for reading (DEP reading), and these information are stored in the memory 18.
In a predetermined area.

Next, in S12, as a result of the detection of the use condition detected in S11, it is determined whether or not the partially taken out film cartridge (partial) in which unexposed frames remain remains loaded. And, in the case of a film cartridge taken out halfway, a mid-roll change (MRC)
A process called control is performed (S13). That is, MR
The C control is a series of controls for extracting a film from a film cartridge taken out halfway and automatically setting the first unexposed frame. The film is sent out from the film cartridge, and the magnetic head 12 sends the film through the recording / reproducing circuit 15. It is determined whether or not magnetic information is recorded in each frame based on the input reproduction signal. If it is determined that no magnetic information is recorded on the frame (that is, it is an unexposed frame), it is confirmed that the perforation 7a on the top side of the frame passes after stopping the sending of the film. The film is rewound until the unexposed frame is set at a predetermined position.

On the other hand, if it is determined in S12 that a cartridge other than the halfway-taken-out film cartridge has been loaded, the process proceeds to S14, where it is determined whether or not the film cartridge is an unused (for example, new) film cartridge. If it is not an unused film cartridge, it is determined that the film cartridge cannot be photographed (exposed), and the processing proceeds to (A) in the figure without performing processing such as film feeding. That is, in the VEI control, the spool 4
And a crossed-out mark indicating that exposure has been completed by moving the tongue piece to a predetermined position (expose).
This is set to d), and the cartridge loading process ends.

On the other hand, if it is confirmed in S14 that the loaded cartridge is unused, a frame set flag indicating the total number of frames Nmax is stored in the memory 18 based on the information read by the DD control. The film is stored in a predetermined area, and the film is fed in accordance with the value Nmax of the frame set flag. That is, a first frame set (FFS) for feeding the film up to the first photographing frame is executed (S15).

First frame set control (S1
5) Or after the MRC control (S13), the flash charging control is performed (S16), and the initial value setting of the camera is performed (S17). At this time, the remaining number of unexposed frames (in the case of a new film cartridge, the total number of frames Nmax read under DD control) is displayed on the film counter section 14B of the LCD 14 described above.

After the photographable state has been prepared,
The state of the rewind switch 13D (MR switch) is confirmed (S18). The MR switch is provided for forcibly rewinding while an unexposed frame remains in the cartridge, and is normally in an off state unless the user turns on the MR switch. M
If the R switch is off, then the state of the release switch is determined. That is, it is determined whether or not the shutter release switch has been pressed. If the release switch is off, the process returns to S18; if the release switch is on, the automatic exposure / autofocus (AE / A)
F) Following the control (S20), the shutter control (S2
1) is executed, and shooting is performed. Then, the magnetic write data such as the photographing conditions relating to the photographed frame is set in the RAM (S22), and then the magnetic information write control is performed at the time of automatic winding of one frame (S23). The remaining number in the film count unit 14B of the LCD 14 is decremented by one.

Next, it is confirmed whether or not the shooting of all the frames has been completed (S24). If the shooting has not been completed (that is, if there are unexposed frames remaining), the process proceeds to (B) in FIG. It returns to S18 shown. On the other hand, when the photographing (exposure) of all the frames has been completed, the rewind control for automatically rewinding the film is executed (S25). At this time, by moving the spool 4 and the above-mentioned tongue piece to predetermined positions in the VEI control, a cross-shaped white mark (exposed) indicating that exposure has been completed is set.

When the MR switch is turned on in S18, a forced rewind process (rewind control) is executed (S28). That is, the motor 5 is driven in reverse, the film that has been pulled out is rewound into the cartridge, and the light shielding cover is closed. At this time, the presence or absence of shooting experience is confirmed (S29). If the film has no shooting experience (unused), the film is set to white (unexposed) with a circle indicating that it is unused in VEI control. And then (S
30) When the processing is completed and the film has experience of photographing, the half-moon mark indicating that unexposed frames remain in the VEI control is set to white display (partial) (S3).
1) End the process. Thus, when the film cartridge is taken out of the camera, the usage status of the film can be easily confirmed.

Next, the display contents of the LCD 14 in the case where the film cartridge taken out halfway is loaded into the camera and the film is automatically fed from this film cartridge to the first unexposed frame will be described. It is to be noted that the film cartridge taken out halfway has, for example, a total of 40 frames, 20 unexposed frames remaining, and a film type of a negative film having an ISO sensitivity of 200.

In this case, as shown in FIG.
The above-described DEP / DD processing is completed, and the film type,
After the information such as the ISO sensitivity and the total number of frames is acquired (S11 in FIG. 4), the film feeding is started. The display at that time is displayed on the date display unit 14A as a film type (in this case, a negative film). , No display) and the ISO sensitivity “200” are displayed, and the film counter 14B displays “ Is displayed.

Subsequently, perforation 7 of the first frame
When "a" is detected, the total number of frames "40" is displayed on the film counter 14B, and thereafter, the display of the film counter 14B is sequentially reduced every time the perforation 7a is detected until an unexposed frame is detected. indicate. When the display of the film counter section 14B becomes "19", it is determined that the frame is an unexposed frame, and after the film is stopped as described above, it is confirmed that the perforation 7a on the top side of the frame has passed. Since the film is rewound until the operation is completed, the display on the film counter 14B becomes "20" again.

When the setting of the unexposed frames is completed in this way, the date display section 14A returns to the original date display mode (in this embodiment, "'96 326") while the display of the film counter section 14B remains unchanged. . On the other hand, FIG.
As shown in (B), at the time of the rewind operation after the end of the all-frame shooting (S25 in FIG. 4), the display of the remaining number of unexposed frames by the film counter unit 14B is changed to the total number of frames (this In this case, after setting to 40), rewinding of the film is started. Then, every time the perforation 7a is detected, the display of the film counter 14B is sequentially subtracted and displayed. At this time, the display of the date display section 14A remains in the original date display mode.

As described above, the display form of the date display section 14A is made different between during the setting of the unexposed frame and during the rewind, so that the user can perform any operation of the camera just by looking at the display section of the LCD 14. Can be identified. FIGS. 6A and 6B are diagrams showing other display forms of the LCD 14 during the setting and the rewinding of the unexposed frame, respectively.

In the figure, during the setting of the unexposed frame, the middle segment of the seven segments of the date display section 14A is blinked so as to flow from right to left so as to indicate the film feeding direction. As a result, as shown in FIG. 3, the film cartridge is displayed on the right end of the LCD 14, so that the segments are blinked so as to flow from right to left so that the film is sent out from the film cartridge (unexposed frames). Is set) is recognized.

Similarly, during a normal rewind, the segment is blinked so as to flow from left to right. As a result, it is recognized that the film is rewound into the film cartridge (during rewind). In the above embodiment, the case where the LCD 14 for displaying segments is used has been described, but an LCD for displaying dots may be used. In this case, the setting of the unexposed frame and the rewinding can be displayed in an identifiable manner as shown in FIGS. 7A and 7B, respectively.

That is, during the setting of the unexposed frames, FIG.
As shown in (A), the film type is “neg” and the IS
After the O sensitivity is displayed as “200”, “during MRC” is displayed during film feeding. Similarly, during the rewind, “REW in progress” is displayed as shown in FIG.
When the number of characters to be displayed in a dot is large, not only the above-mentioned abbreviations, but also “during unexposed frame setting” and “during rewinding”
May be displayed.

[0040]

As described above, according to the camera of the present invention, the display contents during normal rewinding and the display contents during feeding from the film cartridge taken out halfway to the first unexposed frame are displayed. Since the display is changed and displayed, it is possible to easily recognize whether the camera is performing the film rewinding operation or the normal rewinding operation or the unexposed frame setting operation.

[Brief description of the drawings]

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

FIG. 2 is a rear view of the camera.

FIG. 3 is an enlarged plan view of a liquid crystal display provided on the back of the camera.

FIG. 4 is a flowchart showing a flow of processing of the camera shown in FIG. 1;

FIG. 5 is a diagram showing a display example of a main part in the liquid crystal display shown in FIG. 3;

FIG. 6 is a view showing another display example of a main part of the liquid crystal display shown in FIG. 3;

FIG. 7 is a diagram showing a display example of a main part when a liquid crystal display for dot display is used.

FIG. 8 is an explanatory diagram of a structure of a new standard film cartridge.

[Explanation of symbols]

 2 ... Microcomputer 7, 103 ... Photo film 8, 100 ... Film cartridge 14 ... Liquid crystal display (LCD) 14A ... Date display section 14B ... Film counter section

Claims (5)

[Claims] When a film cartridge loaded in a camera is determined to be a film cartridge containing an exposed frame and an unexposed frame and being taken out halfway and containing a film having the exposed frame and an unexposed frame, automatic operation is performed from the film cartridge to the first unexposed frame. A camera that feeds the film in a selective manner, wherein display means for changing and displaying the display content during normal rewinding and the display content during feeding from the film cartridge taken out halfway through to the first unexposed frame are provided. A camera which is provided so as to be able to identify whether a normal rewind or an unexposed frame is being set based on the display contents of the display means. 2. The display means displays the remaining number of frames that can be taken during shooting, and displays a count value sequentially counted down according to the number of frames rewound from the number of shots during the rewind, 2. The camera according to claim 1, wherein when feeding from the film cartridge taken out halfway through to the first unexposed frame, a count value sequentially counted down according to the number of frames fed from all frames is displayed. 3. The display means has a display unit for switching and displaying a date and at least one of a film type and an ISO sensitivity, and displays the date on the display unit during the rewind. 3. The camera according to claim 1, wherein a film type / ISO sensitivity is displayed on the display unit during the setting of the exposure frame. 4. A display device according to claim 1, wherein said display means displays a film feed direction indicating a state in which the film is wound in the film cartridge during the rewind, and a film is fed from the film cartridge during the setting of the unexposed frames. 3. The camera according to claim 1, wherein the camera feed direction indicates a film feeding direction. 5. The camera according to claim 1, wherein said display means displays at least a character indicating an unexposed frame set or an abbreviation thereof in said unexposed frame set.