JPH1078608A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely record correct data on film even after exchanging a power source battery without providing a backup power source for data by changing a display mode to a correction mode at the time of detecting that the power source battery is loaded and changing the data recorded on the film to desired data. SOLUTION: When a new battery is loaded in the camera, a battery resistance detection circuit 35 transmits a reset signal to a CPU 30. When the CPU 30 receives the reset signal, it controls to display '96. 1. 1' as a default value by setting the correction mode. A photographer changes a numerical value such as year, month, day, time and minute to a desired value by depressing a button for date data 7. When the correction mode is completed, a selection mode is started, so that the displayed state of the data displayed on an LCD for date data 6 and the printed state of the data printed on the front surface or the back surface of a photograph are optionally selected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera for forcibly changing a display mode to a correction mode when a power supply battery is replaced.

[0002]

2. Description of the Related Art In a conventional camera, the power required for driving a lens and feeding a film and the power required for backing up date data and the like are covered by a single battery. for that reason,
Such a camera has a problem in that if the power supply battery is removed due to battery replacement or the like, all the data stored and retained before the battery replacement is lost, and correct data cannot be printed when printing photographic paper. there were.

Therefore, in Japanese Patent Publication No. 7-89194, in order to prevent erroneous data from being printed on photographic paper at the time of printing, when the power supply battery is replaced, the mode is forcibly changed to a mode in which data is not printed on photographic paper. A camera to be set is disclosed. The mode of this camera can be changed to a mode for imprinting data by resetting the mode by the photographer.

[0004]

However, in such a camera, if the photographer inadvertently forgets to perform the mode change, there is a problem that desired data is not printed on photographic paper. SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and it is possible to reliably record correct data on a film even after replacing a power supply battery without newly providing a data backup power supply, and print desired data. It is an object to provide a camera that can print on paper.

[0005]

In order to achieve the above object, a camera according to the present invention comprises a detecting means for detecting a loaded state of a power supply battery, and displaying when the detecting means detects the loading of a power supply battery. Control means for changing the mode of the means to the correction mode and changing the data to be recorded on the film to the desired data. With this configuration, the present invention can forcibly change data to be recorded on the film to desired data when the power supply battery is replaced.

[0006]

Next, details of the present invention will be described with reference to the drawings. FIG. 2 is a perspective view showing one embodiment of the camera according to the present invention. In FIG. 1, a camera 1 has a release button 2 composed of a half-press switch and a release switch, a finder 3, an imaging information LCD 4, and imaging information buttons 5a, 5b, 5c.
, Date data LCD 6 and date data buttons 7a, 7b, 7c. The LCD 4 for photographing information and the LCD 6 for date data constitute display means of data to be recorded on the film.

FIG. 3 is an explanatory diagram showing the internal configuration of the camera 1 according to FIG. In FIG. 1, a long film 10 is wound around a cartridge spool 12 and housed in a film cartridge 11. On the film 10, a plurality of frames 10c as image recording portions are formed along the longitudinal direction. Each frame 10c
Is provided with a pair of perforations 10a and 10b and a magnetic recording unit 10d.

Further, the motor 14 is connected to the take-up spool 13.
The cartridge spool 12 can be rotated through the reduction gear unit 15 and the rewinding unit 15a. As a result, the film 10 can be sent out from the film cartridge 11 and, conversely, can be rewound into the film cartridge 11. The film 10 sent from the film cartridge 11 is taken up on a take-up spool 13.

A magnetic head 17 and a pad 1 are provided between the film cartridge 11 and the take-up spool 13.
9 and a photo reflector 16 are provided. The magnetic head 17 is configured to be driven by a magnetic head drive unit 18 in a direction orthogonal to the surface of the film 10. During the film exposure, the film 10
In order to maintain the flatness of the magnetic head 17, the magnetic head 17 is retracted to a position where it does not come into contact with the film 10.

Further, the magnetic head 17 is in contact with the magnetic recording section 10d in order to perform magnetic recording during film feeding. That is, the magnetic recording unit 10 d is sandwiched between the magnetic head 17 and the pad 19. Note that pad 1
The shape of 9 is concave so as to enhance the adhesion to the magnetic recording portion 10d. The magnetic head 10d and the magnetic head drive unit 18 constitute a unit for recording data on the film 10.

The photo reflector 16 irradiates the film 10 with light, and detects the presence or absence of the perforations 10a and 10b according to the reflected light. The lens 23 is driven by the lens drive unit 25 and projects an object image on the film 10. The distance measuring sensor 20 detects the distance to the subject, and the photometric sensor 21 receives light from the subject via the light receiving lens 22 and detects the brightness of the subject.

FIG. 1 is a block diagram showing one embodiment of the present invention. 2, the same reference numerals as those in FIGS. 2 and 3 denote the same or equivalent parts. The CPU 30 includes a camera release button 2, a shooting information LCD 4, a shooting information button 5, a date data LCD 6, a date data button 7, a photo reflector 16, and a magnetic head drive unit 1.
8. The operation of the distance measurement sensor 20, the photometry sensor 21, the lens drive unit 25, and the like and the flow of signals are controlled.

The CPU 30 has a RAM 31 for storing data such as date data and shutter speed for magnetic recording for each frame, and an EEP for storing camera control information.
A ROM 33 is provided to control a clock circuit 32 for storing and updating information such as year, month, day, hour, minute, second, day of the week, etc., and a motor driver 36 for controlling driving of the motor 14. Have been.

The photographing information LCD 4 displays a photographing mode, a shutter speed, an aperture value, a photometric mode, and the like. That is,
When the photographer presses the photographing information button 5, the photographing mode such as "program", "shutter priority", "aperture priority", "manual", "split photometry", "center-weighted photometry", "spot photometry" Etc. can be selected. Each device according to the present invention is driven by electric power supplied from a power supply battery 34. And CPU
Numeral 30 constantly monitors the resistance of the power supply battery 34 via the battery resistance detection circuit 35 to monitor the loaded state of the power supply battery 34.

FIG. 4 is an explanatory diagram showing details of the magnetic recording portion 10d of the film 10 shown in FIG. In the figure, a plurality of frames 10c are formed on a long film 10 along a longitudinal direction, and each frame 10c has a pair of perforations 10a and 10b and one magnetic recording unit 10a.
d is provided. The magnetic recording unit 10d is divided into a plurality of areas as shown in the lower diagram of FIG. 4, and stores a start command, date data, photographing data, and an end command in order from the film winding direction (the direction of the arrow in the drawing).

FIG. 5 shows a date data LCD 6 according to FIG.
FIG. 9 is an explanatory diagram showing a display example of “”. In FIG. 1, the date data LCD 6 includes a date / month / year display 6a and a time display 6b. The date / month / year display section 6a is also provided with a front print instruction mark 6c, and date data is printed at the time of printing on the front of a frame photographed when the front print instruction mark 6c is lit.

The buttons 7a, 7b, 7c constitute a date data button 7. Each time the button 7a is pressed once, the print mode can be selected, and “year, month, day,
Hour, minute "," month, year, day, hour, minute "," day, month, year,
Hours, minutes "," year, month, day,-,-"," month, year, day,
-,-"," Day, month, year,-,-","-,-,-,
−, − ”, And“ photographing information ”.

Each time the button 7b is pressed once, the corrected segment can be displayed by blinking the seven segments two digits from the left in the figure. That is, "year, month, day, hour, minute"
Is displayed, the year, month,..., Hour, and minute can be sequentially blinked. At this time, each time the button 7c is pressed once, the numerical value of the blinking portion can be changed. In FIG. 5, all segments of the date data LCD 6 are displayed.

The operation of one embodiment of the present invention having the above configuration will be described with reference to FIG. FIG. 6 is a flowchart showing an operation sequence of the CPU 30 shown in FIG. In step 101, after the film cartridge 20 has been loaded into the camera 1, the CPU 30 determines whether or not a back cover switch (not shown) has been turned on. Then, when the back cover switch is turned on, the process proceeds to step 102.

In step 102, the CPU 30 reads a bar code (not shown) written on the film cartridge 11 to determine information such as film sensitivity, the number of shots, and the film type.
Write to 3. In step 103, the CPU 30 rotates the motor 14 via the motor driver 36 to wind the film 10 onto the take-up spool 13 (auto-loading).

In step 104, the CPU 30 detects the perforation 10b from the output signal of the photo reflector 16, and determines whether or not the first frame 10c has reached the predetermined aperture position. Then, when the frame 10c reaches the aperture position, the process proceeds to step 105. In step 105, the CPU
Reference numeral 30 determines completion of winding of the film 10. In step 106, the CPU 30 sets the battery resistance detection circuit 35
, And if the battery needs to be replaced, a warning is displayed on the photographing information LCD 4 or the like to prompt the photographer to replace the battery.

In step 107, the CPU 30 determines whether or not the half-press switch of the release button 2 is in the ON state. In step 108, the CPU 30
Photometry and ranging are performed by the ranging sensor 20. In step 109, the CPU 30 determines whether or not the release switch of the release button 2 is in the ON state.

In step 110, the CPU 30 performs an exposure operation of the film 10. In step 111, the CPU 30 takes up the film 10 and takes up the spool 1
Start winding to 3. In step 112,
The CPU 30 magnetically records information such as date data on the magnetic recording unit 10d on the film 10 via the magnetic head 17 in the order of start command, date data, photographing data, and end command. The date data stores all data of "year, month, day, hour, minute" regardless of the selected mode.

In step 113, the CPU 30 determines from the output signal of the photoreflector 16 whether or not the winding of one frame has been completed, and returns to step 112 until the completion to continue the magnetic recording. And CPU3
If 0 is determined that the winding of one frame is completed, step 1 is executed.
Move to 14. In step 114, the CPU 30
Performs an inspection of the power supply battery 34 in the same manner as in step 106,
When the battery needs to be replaced, a warning is displayed on the photographing information LCD 4.

If the CPU 30 determines in step 115 that the number of films 10 still remains from the number of frames shot, the process proceeds to step 107. And CP
If U30 determines that there is no remaining number of films 10, the process proceeds to step 116. In step 116, the CPU 30 executes the rewinding of the film 10, and when the film
To stop.

Next, the CPU when the power supply battery 34 is replaced
The operation sequence of 30 will be described with reference to FIG.
FIG. 7 is a flowchart showing an operation sequence of the CPU 30 when the power supply battery is replaced. In step 201, when a new battery is loaded in the camera 1, the battery resistance detection circuit 35 sends a reset signal to the CPU 30.

In step 202, upon receiving the reset signal, the CPU 30 enters the correction mode and displays, for example, "'96 11" as a default value. At this time, “96” blinks, that is, FIGS. 8A and 8B
And are displayed alternately. Then, by pressing the date data button 7, the photographer can change numerical values such as year, month, day, hour, minute and the like to desired values. Step 203
In step, if the correction mode has not been completed, the CPU 30 proceeds to step 205 to perform release lock,
The release operation is prohibited from being performed during the correction mode. Upon completion of the correction mode, the CPU 30 proceeds to step 204. In step 204, the CPU
Reference numeral 30 controls each device to perform normal photographing.

FIG. 9 shows the CPU 3 when the power supply battery is replaced.
6 is a flowchart showing an operation sequence of 0. Note that the operation according to FIG. 9 is almost the same as the operation in FIG. 7, except that step 304 is added. Step 304
In, when the correction mode is completed, enter the selection mode,
The display form of the data displayed on the date data LCD 6 and the print form of the data printed on the front or back of the photograph can be arbitrarily selected from Table 1. In Table 1, +/- indicates exposure, AMP indicates a shooting mode, Tv indicates a shutter speed, and Av indicates an aperture value.

[0029]

[Table 1]

[0030]

As described above, the camera according to the present invention forcibly changes the mode of the display means to the correction mode when the power battery is newly inserted, so that erroneous data is recorded on the film. Can be prevented. The means for recording data on the film is not limited to magnetic means, and the present invention can be applied to a camera that optically captures data.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a perspective view showing one embodiment of a camera according to the present invention.

FIG. 3 is an explanatory diagram showing one embodiment of an internal mechanism of the camera according to FIG. 2;

FIG. 4 is an explanatory view showing one embodiment of the film 10 according to FIG.

FIG. 5 is an explanatory diagram showing one embodiment of the date data LCD 6 according to FIG. 1;

FIG. 6 is a flowchart showing an operation sequence of the CPU 30 according to FIG. 1;

FIG. 7 is a flowchart showing an operation sequence of the CPU 30 when the power supply battery is replaced.

8 is an explanatory diagram showing a display example of the date data LCD 6 shown in FIG.

FIG. 9 is a flowchart showing an operation sequence of the CPU 30 when the power supply battery is replaced.

[Explanation of symbols]

2 release button, 4 photography information LCD, 5 photography information button, 6 date data LCD, 7 date data button, 10 film, 14 motor, 17
... Magnetic head, 18 ... Magnetic head drive unit, 19 ...
Pad, 20: distance measuring sensor, 21: photometric sensor, 23 ...
Shutter, 24 ... lens, 25 ... lens drive unit,
30 CPU, 31 RAM, 32 clock circuit, 33
EEPROM, 34: power supply battery, 35: battery resistance detection circuit, 36: motor driver.

Claims (4)

[Claims] 1. A camera comprising: recording means for recording data for printing on photographic paper after photographing on a film; and display means for displaying the data. And a control means having a function of changing the mode of the display means to the correction mode and changing the data to be recorded on the film to the desired data when the detection means detects the loading of the power supply battery. A camera characterized by the following. 2. The camera according to claim 1, further comprising clock means for storing and updating year, month, day, hour, minute, and second as the data. 3. The camera according to claim 1, wherein the control unit sets one or both of a display mode of data displayed by the display unit and a print mode of data to be printed on photographic paper to a desired mode. A camera having a function. 4. The camera according to claim 1, wherein the control unit prohibits the release operation during the correction mode.