JPH047536A - Camera with data imprinting function - Google Patents

Abstract

PURPOSE:To imprint necessary data correctly between perforations even at the time of the photography of a final frame by comparing the number of exposed frames obtained by a film perforation counter with the possible number of frames to be exposed which is read out of a film cartridge. CONSTITUTION:The photographing possible number of frames is read out of the CAS code of a film 21 which is recorded previously on the film cartridge 23 and compared with the number of frames which are already exposed and after it is judged whether the film can be fed by a specific quantity in next film feeding operation, whether or not another photograph can be taken or not is determined. When the photography is impossible, the film 21 is fed by one perforation so as to imprint normal data between perforations in an expected data imprinting area LED.S(n1) in next feeding, and the data is imprinted in the LED.S(n1); and then the film is rewound into the cartridge 23. Consequently, the data can be imprinted correctly between the perforations even at the time of the photography of the final frame.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a camera capable of imprinting data information such as a date onto a film, and particularly a data imprinting function that imprints data, etc. outside the shooting screen of the film. Regarding the attached camera.

(Prior Art) Conventionally, it is well known to imprint data in the corner of the photographic screen in the form of letters and numbers that the photographer can confirm. On the other hand, there is a method described in Japanese Patent Laid-Open No. 62-50743, in which data such as the date is encoded and imprinted on the right edge of the screen when viewed from the back of the film, as a method for imprinting data outside the photographic screen of the film. With this method, there is a high possibility that data will be lost when the film is cut during editing after film development, and the light emitting means for code imprinting is required for the number of bits to be imprinted, which is expensive, takes up a large wiring space, and causes flare. Because the contrast is reduced and the light-emitting elements need to be precisely aligned, there is a method in which data is imprinted between one or both of the upper and lower perforations of the film.

When imprinting data between the perforations, in order to imprint the data as much as possible and to prevent information from being lost when the film is cut, it is necessary to
It is necessary that the center between the holes 10 and the center of the perforation 111 approximately coincide with each other. For this purpose, the light emitting means 1 is placed at the light emitting means (LED) arrangement position 119 shown in FIG.
It is necessary to install the LE 20 in the position shown in Figure 6.
If D is placed, the inner rail 117 will be separated near the aperture, which will worsen the dimensional stability of the aperture rail of the camera body and worsen the film condition during shooting. It is conceivable to install means. Light emitting means arrangement positions A-D shown in Fig. 7
The camera structure is such that the film cartridge is loaded on the right side or the left side of the aperture when viewed from the back cover side of the camera. There are four combinations available depending on whether you use the winding shooting method, which rewinds the film into the cartridge, or the preliminary winding method, which winds the film into the spool by a predetermined amount and then winds it into the cartridge after each frame has been shot. Thus, the light emitting means arrangement position 119 is determined.

In addition, in the above case, as shown in Fig. 8, the data imprint area (LED-8 (n□) to LEI) S (n, )) between 8 perforations in the longitudinal direction of one photographic screen.
corresponds.

As an example of a camera structure where the film cartridge is placed to the left of the aperture when the film feeding method is the winding shooting method, when the film is fed after shooting one frame, the shot screen, the aperture, and the perforation occur. Since the position is as shown in Figure 9, data cannot be imprinted in the data imprint area LED'S (nl) shown in Figure 8, so save the data corresponding to LED-8 (nl). There is a method of storing the information (in the second data storage section) and imprinting it the next time the film is fed.

(Problem to be solved by the invention) However, when the next film is fed, the LED 5 (n
The method of imprinting (1) assumes that the film can be fed after shooting. If the film cannot be fed after shooting, a problem arises in that the data cannot be imprinted even though the film has been shot. This occurs when the final frame is photographed.

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned problems, and it is an object of the present invention to provide a camera with a data imprinting function that can reliably imprint data even when photographing the final frame.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a method for determining the number of photographable frames of a film stored in advance in a film cartridge.
The number of frames that can be photographed is read from the AS code, this is compared with the number of frames that have been photographed, and after determining whether or not it is possible to feed a specified amount the next time the film is fed, it is determined whether or not to shoot. be.

If it becomes impossible to shoot at this point, the film is fed for only one pass in order to imprint data between the perforations of LED-8 (nl), which is scheduled to be imprinted the next time it is fed. and LED-8 (n□
), and then the film is rewound to the cartridge.

Note that the predetermined amount in "Is it possible to feed a predetermined amount" mentioned above refers to 9 perforations. In addition, when the manual rewind button is operated regardless of shooting the final frame of the film, the film is fed by one perforation, and the film after the previous shooting is fed between the perforations of LEI) S (nl). The data that was not imprinted on the camera is imprinted onto the film, and the photographed film is then rewound to the cartridge.

(Function) Therefore, according to the present invention, even when photographing the final frame, data can be correctly imprinted between the perforations, and even when it is necessary to rewind the film and the manual rewind button is operated, the perforations can be correctly imprinted. Necessary data can be imprinted in between.

(Embodiment) FIG. 1 shows an outline of the overall configuration of a camera with a data imprinting function to which the present invention is applied. In Fig. 1, 1 is the overall camera control/calculation unit that performs all controls and calculations for the camera, 2 is the zoom button, 3 is the photometry switch for performing photometry operation, 4 is the release switch for shirt release, and 5 1 is a manual rewind button for manually rewinding the film to the cartridge, 6 is a date imprint mode button for selecting whether to print the date, and 7 is a date stamp mode button for selecting whether to print the date.
is a strobe, 8 is a strobe drive unit that is linked to zooming and drives the strobe optical system to change the strobe illumination angle, and 9 is a strobe control unit. Light emission and dimming of the strobe 7 is controlled by control signals from the strobe controller 9 . Reference numeral 10 denotes an external display section that displays various conditions necessary for operating the camera, 11 an internal display section that displays various conditions within the finder, 12 a zoom finder optical system, and 13 a finder consisting of a motor and a transmission system. The zoom drive unit 14 is a finder zoom control unit, and 15 is a finder position (angle of view) information detection unit. The finder zoom control unit 14 controls the zoom finder optical system 12 via the finder zoom drive unit 13. Also, the finder position (angle of view) is determined by the finder position information detection unit 15.
is detected and input to the camera overall control/calculation section 1. 16 is a photometric element, 17 is a photometric unit that converts the output of the photometric element 16 to the camera overall control/calculation unit 1, 18 is a shutter, 19 is a shutter drive unit, and 2o is a shutter control unit, which controls the entire camera and performs calculations. The shutter 18 is controlled via the shutter drive section 19 based on the shutter speed determined by the shutter section 1. 21 is a film, 22 is a spool for winding the film, 23 is a cartridge, 24 is a film feeding drive section, 25 is a film feeding control section, and film feeding (winding and rewinding) is carried out by the camera overall control/calculation section 1. Based on the instructions, the film feeding control section 25 feeds the film via the film feeding drive section 24 by controlling the spool 22 during winding and the cartridge 23 during rewinding. 26 is a perforation detecting means for detecting perforations in the film, and 27 is a perforation detecting section. The perforation detecting means 26 and the perforation detecting section 27 detect the running of the perforations on the film and the amount thereof. Reference numeral 28 denotes a light emitting means such as an LED, 29 a light emitting means driving section, and 3o a light emitting means control section. Data such as the date are driven by the light emitting means control section 3o based on instructions from the camera overall control/calculation section 1. Data is imprinted between the perforations of the film through the section 29 by turning on and off the light emitting means 28 in synchronization with the signal from the perforation detecting section 27. Reference numeral 31 denotes a CAS code reading section that reads information (CAS code) regarding the film sensitivity etc. loaded in the camera, and 32 is a cartridge presence/absence detection section that detects whether or not the cartridge 23 is loaded in the camera. 33 is lens group 1 and lens group 2
34 is a photographic lens drive section consisting of a motor and its transmission system that drives focus by lens group 1 and bifocal switching by lens group 2; 35 is a photographic lens control section which controls the entire camera. Arithmetic unit 1
Based on the instruction, the focus and bifocal switching of the photographic lens 33 are controlled via the photographic lens drive section 34. 3
Reference numeral 6 denotes a photographing lens position information detection unit that detects position information of the lens group 1. 37 is a light emitting element, 38 is a light receiving element, and the distance to the subject is measured by a distance measuring section 39. Reference numeral 40 denotes a posture sensor, and 41 denotes a photographing posture detecting section.The photographing posture detecting section 41 detects four photographing postures of the camera based on information from the posture sensor 40. Reference numeral 42 indicates a back cover opening/closing detection section for detecting opening/closing of the back cover, and 43 indicates a power supply voltage detection section.

FIG. 2 shows an example of data imprinted using the camera with the data imprinting function shown in FIG. In Figure 2, 21
211 is a photographing screen, 212 is a perforation, and 213 is a data imprinting position. As is clear from FIG. 2, the data imprinting position 213 is between the perforations at the top (or bottom) of the photographing screen 211. In addition, the operation of imprinting data at the above position is performed using multiple light emitting diodes (LEDs) while the film is being fed.
A light emitting means control section controls lighting and extinguishing of the light emitting means constituted by the light emitting means to imprint data between the perforations, and further updates the imprint data every time one perforation 212 is sent. Therefore, one shooting screen 211
corresponds to 8 data imprinting positions, so if the number of LEDs is 3, for example, 3×8=24 bits of data can be input between the upper (or lower) perforations.

FIG. 3 shows only the relevant parts of the force muffler of FIG. 1 in one embodiment of the present invention. In FIG. 3, reference numeral 1 denotes a camera overall control/calculation unit, which includes a first data storage unit 101 that stores shooting information at the time of release, and a predetermined information (copying information between the first perforations) of the previous shooting information. A second data storage unit 102 stores the information LED S(n, )), a perforation counting means 103 counts the number of detected perforations, a control unit 104 performs various controls, and the cartridge is rewound. a rewinding start signal output means 105 for outputting a start signal for rewinding, a photographable frame number detection means 106 for detecting the number of photographed frames stored in the cartridge, and a photographic frame number detecting means 106 for storing the number of photographed frames. A storage means 107, a film end determination means 108 for comparing the output of the number of photographable frames detection means 106 and the output of the number of photographable frames storage means 107 to detect whether or not the film is at the end, Manual rewind detection means 109 to detect
It has 4 is the release switch, 5 is the manual rewind button, 22 is the spool, 23 is the cartridge,
24 is a film feeding drive section, 25 is a film feeding control section, 26 is a perforation detection means, 27 is a perforation detection section, 28 is a light emitting means, 29 is a light emitting means driving section, 30 is a light emitting means control section, 31 is a CAS This is the code reading section. 4, 5 and 21-31 are the same functional blocks as the corresponding numbers in FIG.

FIG. 4 shows an operation flowchart for imprinting data between perforations in an embodiment of the present invention.

Next, the operation of the above embodiment will be explained with reference to FIGS. 3 and 4. Now, when the distance measurement operation (not explained) is completed and the release switch 4 is pressed, the control unit 104 disables all external interrupts. , encode the imprint data (
S□5) and the number of perforations (P-C-L) corresponding to the number of photographed frames
Check whether it is the first frame (S
,,). In the case of the first frame (first frame), the second
The contents (3 bits) of the data storage section are all set to "1" (sit).

Next, perforation counting means 103 (hereinafter, p
-c) is set to the maximum value (9), the feeding motor is rotated forward (drives toward the spool side) (sis), and the 3-bit light emitting means 28 is controlled to set the perforation counter value (i). Imprint the corresponding data. That is, first P
Since the value of -C103 is set to the maximum value (9), the light emitting means control unit 30 is controlled and the 3 bits of the second data storage unit 102 (all 1''' in the first frame, otherwise the pre-recording Part of the time data) is imprinted (81!
l). When the copying is completed and the P-C103 is the maximum value (9), the data to be copied between the first perforations (LED-8(nl) FIG. 8) stored in the first data storage unit 101 is transferred to the 2 to the data storage unit 102 (this data will be imprinted on the film when the next frame is shot) (S
2. ). Also, if P-C103 is not the maximum value (9), the perforation detection operation is immediately started (S22
). Perforation detection is performed by perforation detection means 26 and perforation detection section 27. When the control unit 104 learns of perforation detection,
Check whether the value of P-C103 is 2, and
When the value of -C103 is other than 2, 1 is subtracted from the value of P-C103, and the contents of the first data storage unit 101 (data at the time of current shooting) corresponding to the value of P-C103 are copied between the corresponding perforations. (S24.S□,).

When the value of P-C103 is 2, the number of perforations for one frame (8) is added to the number of perforations (P-C-L) corresponding to the number of photographed frames stored in the photographed frame number storage means 107 (P-C -L=PC-L+8) Stored in the number of photographed frames storage means 107.

On the other hand, since the number of recordable frames (F-E-X) read from the cartridge 23 by the CAS code reading section 31 is detected and held by the recordable frame number detection means 106, the control section 104 controls the film end determination means 108. control, F-
Compare P-C-L with E-X multiplied by 8, and P-C-
When it is determined that L ≧ 8 The light emitting means 28 by controlling the section 30
Turn off the light emission (S2□).

Also, when it is determined that P-C-L≧8XF-E-X, it means that the final frame has been photographed, so the film feed control unit 2
5 to rotate forward, and set P-C103 to the maximum value (9) to rotate the LE between the perforations of the final piece.
The unimprinted information is imprinted on the second data storage unit 102 corresponding to D-8(nl) (S211). Next, the light emitting means control unit 30 is controlled to turn off all the light emitting means 28, and the perforations (P) are counted during rewinding.
-C-R-W) to P-C-L-p-c-x (
However, p-c-x is a constant for setting P-C-R-W<P-C-L. There may also be a case where P-C-L becomes larger than the actual value due to an erroneous count or the like immediately after loading the film.

At this time, if P-C-R-W = P-C-F-P-C-L, even after the film has been wound into the cartridge, P-C2P-C-R-W will not be satisfied and the motor will will continue to move forever. To avoid this, P-C-R-W
Set p- to a small value and use the timer described later.
(The motor is driven by time control for a time corresponding to c-x minutes.) Furthermore, p-c103 is set to "O". Then, the film feeding motor is reversed, and while the film is rewound into the cartridge, perforations are detected by the perforation detection means 26 and the perforation detection section 27, and P-C103 is counted up (p-
c=pc11), and continues counting up P-C103 until it reaches P-C2F-C-R-W. P-C2F
- After reaching C-R・W, the control unit 104 sets a timer (not shown) to 0'' and starts counting in order to continue rewinding by the amount of the previous p-c-x + margin. ,
When the timer elapses for a predetermined time, the control section 104 controls the film feeding control section 25 to stop the feeding motor (
S34), Displays winding completion (not shown) (S,,)
.

Note that even if the shooting of the last frame is not completed, if the manual rewind button 5 is operated, the control section 104 detects this information, causes the rewind start signal output means 105 to output a rewind start signal, and starts feeding the film. Drive the motor in the forward rotation direction53
6) The film feeding control section 25 is controlled to first imprint the unimprinted information of the last frame (S2.), and then the film feeding motor is reversed to rewind the film in the same manner as above.

(Effects of the Invention) As is clear from the embodiments described above, the present invention has the advantage that necessary data can be correctly imprinted between perforations even when photographing the final frame. Also,
Even when it is necessary to rewind the film in the middle of the film and the manual rewind button is pressed, it has the effect that necessary data can be recorded correctly between the perforations.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a camera with a data imprinting function to which the present invention is applied, and FIG. 2 is an explanatory diagram of a state in which data is imprinted between perforations by the camera of FIG.
FIG. 3 is a functional block diagram of a data imprinting camera according to an embodiment of the present invention, and FIG. 4 is an operation flowchart of an embodiment of the present invention. FIG. 1...Camera overall control/calculation section, 2...Zoom button, 3...Photometering switch, 4...Photography lens drive section, 35...Photography lens control section, 36...Photography lens position Information detection unit, 37... Light emitting element, 38.
...Light receiving element, 39... Distance measuring section, 40... Attitude sensor, 41... Shooting attitude detecting section, 42... Back cover opening/closing detecting section, 43... Power supply voltage detecting section, 101... ...first data storage section, 102...second data storage section, 103.
...Perforation counting means, 104...Control unit, 105...Rewinding start signal output means, 106...
- Number of photographable frames detection means, 107... Number of photographed frames storage means, 108... Film end determination means, 109...
・Manual rewind button, 110.211... Shooting screen, 111, 212... Perforation, 1
15...Camera body, 116...Aperture, 11
7...Inner rail, 118...Outer rail, 119...
- Light emitting means arrangement position, 213... data imprinting position.

Claims (3)

[Claims] (1) A camera that allows data such as the date to be imprinted between the perforations of the film, and that after loading the film, winds the film into the spool after each shot, and then rewinds the film into the cartridge after shooting all the shots. A perforation detection means for detecting perforations in the film, a light emission means for imprinting data on the film, and a light emission control means for controlling turning on and off of the light emission means in synchronization with a signal from the perforation detection means. , a first storage means for storing release shooting information, a second storage means for storing predetermined information among the previous shooting information, a film feeding means for feeding the film, and the perforation. It has a perforation counting means for counting the output of the detection means, and a rewinding start signal outputting means for emitting a start signal for rewinding the film into the cartridge, and the rewinding start signal is output by the rewinding start signal outputting means. When the perforation is output, the film is fed in the spool direction by the film feeding device until the count number by the perforation counting device reaches a predetermined value, based on the data stored in the second storage device. A camera with a data imprinting function, wherein the light emitting means is controlled by the light emitting control means, and after the count reaches a predetermined value, the film is fed in the direction of the cartridge and wound into the cartridge. (2) A photographable frame number detection means detects how many frames of the loaded film can be photographed, and the output of the photographable frame number detection means is compared with the number of photographed frames to determine that the film is at the end. Claim (1) further comprising a film end determining means for determining whether the film is at the end, and outputting a rewinding start signal for rewinding the film when the film end determining means determines that the film is at the end. ) Camera with data imprint function. (3) A photographable frame number detection means detects how many frames of the loaded film can be photographed, and the output of the photographable frame number detection means is compared with the number of photographed frames to determine whether the film is at the end. a film end determination means for determining whether or not the film end is reached;
manual rewind detection means for detecting operation of a manual rewind button, and rewinding the film when the film end determination means determines that the film is at the end or when the manual rewind detection means detects operation of the manual rewind button. Claim (1) characterized in that a rewinding start signal is output for
) Camera with data imprint function.