JP2000180941A - Camera provided with data imprinting function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the printing quality of data imprinting between perforations and to easily change a parameter related on an imprinting action as a camera with a data imprinting function. SOLUTION: This camera is provided with a data imprinting means for imprinting characters forming the prescribed data in the traveling direction of a film in a column unit, a means for measuring the traveling speed of the film, and a means for calculating and controlling the imprinting start position of the data based on the reference delay time of optionally decided reference film speed and the measured traveling speed of the film, calculating the width of the data in the traveling direction of the film based on a reference cycle obtained by deciding the imprinting cycle of the data based on the reference film speed and the measured film speed and controlling the imprinting start position of the data by the data imprinting means and the imprinting cycle of the data imprinting means based on the calculated results.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera capable of printing photographic data such as a shutter speed and an aperture value on a film.

[0002]

2. Description of the Related Art A conventional camera which prints shooting data such as a shooting date, a shutter speed, and an aperture value in a region between two adjacent perforations when a film is running, prints the data to be printed. In order to improve the quality, there has been known a method of making the width of each character constant by making the printing cycle constant. However, in this conventional method, although the horizontal width of a character is constant, the position of imprinting is not controlled because the position of imprinting is not controlled, and the imprinting position varies due to perforation. Also, the start position of the imprint,
In order to make the width of characters to be imprinted constant or the like, complicated mechanical adjustments were required during camera production.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and in a camera having a function of imprinting data between perforations, the print quality of imprinted data is improved, and The purpose of the present invention is to make it easy to change the parameters related to embedding.

[0004]

SUMMARY OF THE INVENTION The present invention comprises a perforation detecting means for detecting that an edge of a perforation has passed a predetermined position while a film is running, and an imprinting means for imprinting data between two adjacent perforations of the film. In the camera having the film speed measuring means for measuring the running speed of the film, based on the measured film running speed detected by the perforation detecting means and the detected film speed measuring means, the data imprinting means, And a printing start position control means for controlling a position where data printing is started.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. The camera shown in this embodiment is a single-lens reflex camera provided with an electronic control circuit such as exposure control and shutter control. FIG. 1 is a rear view of a single-lens reflex camera body showing an embodiment of the present invention with a back cover opened, and shows an arrangement of a data imprinting device when the back cover is further closed. FIG. 2 is a sectional view of the camera taken along the line II of FIG. In FIG. 1, on the left side of the camera body 21, a cartridge chamber 32 for loading a film cartridge containing the film 14 is provided, and on the right side, a spool chamber 33 having a spool 24 for winding up the film is provided. In the cartridge chamber 32, the rewinding fork 22,
DX contacts 26 for discriminating the DX code on the side of the film cartridge are provided in two rows on the left and right, six in the right row, and three in the left row.
Are arranged. On the left side of the spool chamber 33, a sprocket 25 for detecting perforation passing along with the winding movement of the film is rotatably mounted around a central axis thereof. Also, the cartridge chamber 32
A shutter unit 16 is provided between the shutter unit 16 and the spool chamber 33. Further, a connector 23 is provided at the lower center of the camera body. When the back cover 13 is closed, the connector 23 comes into contact with the connect pin 20 (FIG.
It is possible to send and receive electric signals to and from the electric members provided in the electronic device.

FIG. 3 is a cross-sectional view of the camera body 21 with the back cover 13 closed, taken along a cutting line II-II in FIG. The back cover 13 is provided with a pressure plate 17 and a back cover base plate 18 for maintaining the flatness of the film 14, and the imprinting LED 11 which is a light emitting element for imprinting data between perforations, and the luminous flux emitted therefrom. An imaging optical system 12 leading to the imaging unit 12 a is mounted between the back cover 13 and the back cover base plate 18. Imprint LED11
Are LEDs equivalent to 7 dots arranged in a line. The projection optical system 12 guides the data beam emitted from each projection LED 11 to a predetermined arrangement in the projection unit 12a and focuses the data beam on a spot having a predetermined diameter. The spots of each light beam are arranged in a line at predetermined intervals in a direction orthogonal to the running direction of the film. At the lower part of the back cover 13, a connect pin 20 is provided which comes into contact with the connector 23 of the camera body 21 when the back cover 13 is closed, and is connected to the imprinting LED 11 via a flexible printed circuit board 19. . That is, the transmission and reception of the electric signal between the camera body 21 and the imprinting LED 11 is performed by the connector 2.
3, connect pin 20, flexible printed circuit board 19
Done through.

As shown in FIG. 4, four projections 30 are arranged at equal intervals in the circumferential direction on the sprocket 25, and at least one of them is always engaged with the perforation.
The sprocket 25 rotates as the film 14 travels. Further, the sprocket 25
Gear 25a meshes with the gear 31 integrated with the brush 29, and the CPU 34 detects the rotation of the sprocket 25 by the detection substrate 28 on which the brush 29 slides. That is, the rotation of the sprocket 25 is transmitted to the brush 29, and the output terminals 28a and 28b of the detection board 28 repeatedly short-circuit and open each time the brush 29 rotates a predetermined angle. Since one of the output terminals 28a and 28b is grounded, the other alternately changes between a HIGH level and a LOW level (hereinafter, this mechanism is referred to as a film switch 58). CPU34
Detects the other level change as a film pulse.

FIG. 14 is a view showing a state where the film is wound up to the last frame from the back cover side. When the film is wound up after shooting (when the film moves from left to right in the figure), the film reaches the end before winding up by one frame, and the film can no longer be pulled out of the patrone and ends up. There is.
The end of the winding is the time when the end of the film is reached, and the last photographing end frame at this time is the last frame of the film. At this time, the number of edges of the perforation detected from the last frame of the film to the end of the winding corresponds to the amount of movement of the film from the edge of the last photographic frame of the film to the end of the film.

FIG. 14 shows that after the film reaches the end,
FIG. 10 is a diagram showing a timing chart when data is imprinted between perforations when rewinding a film. In the figure, the horizontal axis is the time axis, and FIG. 14 shows the correlation between the position of perforation and the change of each pulse signal. One frame of film has eight perforations, and it is possible to imprint in the imprint area in seven places per one frame of film, but in this embodiment,
Imprinting in five places is shown. In addition, four characters formed by 7 × 5 dots per character are printed in a printing area between one perforation. In FIG.
The running direction of the film at the time of film rewinding is from right to left. The film switch signal is a LOW / HIGH pulse signal generated when the film switch 58 is short-circuited or opened, and the LOW / HIGH level is inverted every time the edge of the perforation passes a predetermined position. By inverting the pulse signal, it is possible to detect which edge has passed the predetermined position, and to detect the position of the perforation. The data is imprinted from the position set based on the position detection. Symbol A indicates the time of the high level of the film pulse, symbol B indicates the time of the low level of the film pulse, and symbol E indicates the time required for imprinting. At the time of imprinting, in order to correct the deviation between the pulse detection position and the imprinting position, the imprint start delay time calculated from the time (C) for converting the four characters to be imprinted into imprint data and the film speed, The delay time of (D) is provided. By setting such a delay time, it is possible to control the start position of imprinting on the imprint area between perforations.

FIG. 15 is a partially enlarged view of the timing chart shown in FIG. Imprint of characters is 7
One character of × 5 dots is decomposed into five rows, and one row is set from the ISO sensitivity information for each cycle of the pulse signal cycle F (printing cycle) set by calculation from the measured film running speed. Imprinting time G minutes, imprinting LED1
1 is turned on. The character spacing to be imprinted is one dot. Also, since the printing is performed using the printing cycle calculated from the film speed in this manner,
Character width is constant. FIG. 16 is a diagram showing a film (base surface side (back cover side)) on which data is captured by a camera to which the present invention is applied.

FIG. 5 is a block diagram of a control circuit of the single-lens reflex camera of the present embodiment. The control circuit includes a CPU 34 with built-in ROM and RAM for controlling the entire camera. The CPU 34 includes a battery 37 as a power source,
It is connected via a DC / DC converter 35 and a voltage regulator 36. The CPU 34 includes, as driving systems, a mirror motor 39 for driving a main mirror for switching between a finder optical system and a photographing optical system, and a film motor 41 for winding and rewinding the film 14.
Are connected via motor driver ICs 38 and 40, respectively. As the circuit system, a shutter control circuit 42, an aperture control circuit 43, a data imprint circuit 52 for controlling imprinting of data between perforations, and a DX code identification circuit 53 for identifying the DX code of the film cartridge are connected. I have. As a sensor system, an IC 46 for photometry for automatic exposure control and an AVVR 47 for detecting the position of an aperture are connected. As a display and illumination member, the finder LCD 48 and the finder LCD 4 for displaying photographing data and the like in the finder.
LED 49 for illuminating the camera 8, shooting mode and film information (remaining number of sheets, ISO
An external LCD 50 for displaying sensitivity or the like is connected. The switches include a main switch 61 serving as a main power switch, a photometric switch SWS that is turned on when the release button is half-pressed, a release switch SWR that is turned on when the release button is fully pressed, and a film pulse generated by running the film. Switch 58 for turning on / off the data imprinting, a back cover open / close switch 60 for detecting the open / close state of the back cover 13, and a mirror for detecting the position of the main mirror An up switch 56, a mirror down switch 55, a rewind switch 59 for forcibly rewinding, and a film loading switch 57 for determining whether or not a film is loaded are connected. Further, an EEPROM 51 for storing various photographing data, parameters, and the like as storage elements, an oscillator 44 for generating a drive clock for the CPU 34, a clock IC 45 for date / time counting, and the like are connected.

Hereinafter, control of the camera will be described.
FIG. 6 is a flowchart showing a main routine of the single-lens reflex camera to which the present invention is applied. The following processing is executed by the CPU 34. This flow is to control the entire camera, and is started by loading the battery 37. First, the CPU 34 and peripheral circuits are initialized (S101, S102). The data in the EEPROM 51 is read and loaded into the RAM, and the DC / DC converter 3
5 is turned off (S103, S104), and all the switch-related states (whether each switch is ON or OFF) are input (S105). Subsequently, it is checked whether the main switch 61 is ON or OFF (S106). If it is OFF (S106: N), the data of the read switch is processed and displayed on the external LCD 50 (S107, S108). The interrupt of the switch 61 is permitted (S109), and the low power consumption mode (sleep state) is set until the main switch 61 is turned on (S110). When the main switch 61 is turned on, the mode returns to the normal mode (S11
1), interrupt of the main switch 61 is prohibited (S11
2) Return to the process of S105. Thereafter, the processing of S105 to S112 is repeated.

If the main switch 61 is ON (S106:
Y) In order to prepare for the photographing process, a 250 ms timer is started (S113), and the data of each switch input in S105 is processed and displayed on the external LCD 50 (S114, S11).
Five). Next, it is checked whether the rewind switch 59 is ON, and if it is ON, it means that the rewind switch 59 has been pressed, so that a rewind process is executed (S116: Y,
S117), and return to S105. In this rewind processing, photographing data is imprinted, as will be described in detail later. If the rewind switch 59 is OFF, it is checked whether the back cover 13 has changed from the closed state to the open state (S116: N, S118). If the back cover 13 has been opened, the back cover opening process is executed (S119). Return to S105. If it is not in the open state, it is further checked whether the back cover 13 has been changed from the open state to the closed state. If the back cover 13 is in the closed state (S120: Y), there is a possibility that a film has been loaded, so the loading process is performed. Is executed (S121). If the back cover 13 remains closed (S120: N), the photometric switches (the photometric switch SWS and the release switch SWR)
Check whether one of the buttons is ON, that is, whether the release button is half-pressed or fully-pressed. If it is not ON (S122: N), enable the timer interrupt to save power and reduce power consumption. Mode (sleep mode) (S12
3. After 250 ms, return to the normal mode (S12).
5), disable the timer interrupt (S126), and return to S105.

If any of the photometry switches is ON (S122: Y), that is, if the release button is half-pressed, the DC / DC converter 35 is turned on to prepare for the release process, and the power hold timer is set. It is set to 80 times and the 125 ms interval timer is started (S127 to S129). That is, after the photometry-related switch is turned on, the power hold time for maintaining the normal mode even when the photometry-related switch is turned off is set to 10 seconds (= 80 × 125).
(Ms)). Then, all switches are input (S130). Subsequently, it is checked whether the main switch 61 is OFF. If the main switch 61 is OFF, the process returns to S104 because there is no need to continue the process (S131: Y).
If not OFF (S131: N), rewind switch 5
Check whether 9 is ON. Rewind switch 5
If 9 is ON (S132: Y), the process returns to S104 to execute the rewind process, and if the rewind switch 59 is OFF, it is checked whether the back cover 13 has changed from the closed state to the open state. If the back cover 13 has been opened, the process returns to S104 to execute the back cover opening process (S133: Y). If the back cover 13 is not open (S133: N), the back cover 13 is opened. It is checked whether has changed from the open state to the closed state (S134). Back cover 1
If 3 is closed (S134: Y), the process returns to S104 to execute the loading process. If the back cover 13 remains closed (S134: N), each switch is turned ON, OFF, etc. The data that changes according to the data is updated (S135), and photometric calculation is performed (S13
6) A process for displaying various data on the LCD 48 in the finder and the external LCD 50 is performed (S137). Next, check whether the release switch SWR is ON,
If it is ON (S138: Y), the release process is executed (S14
2) Return to S128. If the release switch SWR is OFF (S138: N), it waits for 125 ms to elapse (S139), and after 125 ms elapses, checks whether the power hold timer is 0 (S140). If the power hold timer is not 0, the power hold timer is decremented by 1 and the process returns to S130 (S140: N, S141, S130), and the processes of S130 to S141 are repeated until the power hold timer becomes 0. If the power hold timer is 0, it is checked whether any of the photometry-related switches is ON. If any of the switches is ON (S143: Y), the release button is still half-pressed, so that S130 is prepared for release processing. Return to If any of the photometry-related switches is not ON (S143: N), the process returns to S104.

Here, the release process in S142 will be described with reference to the flowchart of FIG.
The release process flow is as follows:
That is, this is a flow in which, after the release switch SWR is turned on, the shutter, the aperture, the mirror, and the like are driven to execute the exposure processing. In this processing, final photometry and display processing before the release processing is performed (S201), and data for imprinting data (shutter speed, aperture value, blank, etc.).
Is written to the address corresponding to the film frame number of the EEPROM 51 (S202). Subsequently, a mirror up process, an aperture control process, an exposure (shutter control) process, a mirror down process, and a mechanical mechanism charging process are executed (S203 to S20).
Five). Then, the film is wound up (S20).
6) When the end of the film is detected, a rewind process is executed (S207: Y, S208). When the end of the film has not been detected, the process returns (S207: N).

FIG. 8 is a flowchart showing a process for imprinting data in the rewind process (film rewinding) executed in S117 and S208. In this process, first, the rewind process variable is initialized and the state of the film switch 58 is stored in the RAM (S301). Next, the film motor 41 is rotated in reverse to rewind the film, and a 100 μs interval timer for determining a cycle for repeating the processing from S304 to S308 is started (S30).
2, S303). The rising or falling edge of a pulse (hereinafter, “film pulse”) generated by running the film is counted (S304). Subsequently, a data imprinting process is executed, and the fact that a rewind operation is being performed is displayed on the external LCD 50 by a film frame number, a patrone, or the like (S305, S306). Then, it is checked whether the film pulse width measurement counter (edge_width_time), which is a counter used to measure the half cycle of the film pulse, is 16000 or more, that is, 1.6 seconds have elapsed, and if it has not elapsed (S307: N). After waiting for 100 μs to elapse (S308), the process returns to S304 and repeats the above processes.
Film pulse width measurement counter (edge_width_time)
Increases by 1 every 100 μs. If 1.6 seconds elapse without changing the film pulse (S307:
Y) Since the rewinding of the film is completed, the power supply to the film motor 41 is stopped and the film motor 41 is set free (S309, S31).
0). Subsequently, it is checked whether the loading end flag (F_LOAD_OK) is “1”. If the loading end flag (F_LOAD_OK) is 1 (S311: Y), since the film has been loaded, the film serial number (ee_film_no) indicating the serial number of the film is incremented by 1 and the EEPR
Writing to the OM 51 (S312). When the film is not loaded (S311: N) or after the film serial number (ee_film_no) in which 1 is incremented is written in the EEPROM 51, the film end edge number (ee_film_end_edge) which is the number of film pulse edges at the film end is set to 0. ,
These values are written to the EEPROM 51 with the film frame number counter (ee_film_counter) set to 0 (S313, S31).
Four). In addition, the loading normal end flag (F_LOAD_O
K) is set to 0, the film end flag (F_FILM_END) is set to 0, and the rewind end flag (F_REW_END) is set to 1 and written into the EEPROM 51 (S315), and the process returns.

Next, the counting of the edges of the film pulse in S304 will be described. FIG. 9 is a diagram showing the flowchart. This flow detects the state of the film pulse (low level or high level) every 100 μs, and counts each film pulse width measurement counter (edge_width_t
ime), that is, a flow for measuring the time from the change of the state of the film pulse to the next change. When entering this process, first, the film pulse width (time) measurement counter (edge_width_time) is set to 1
Is incremented (S401). Subsequently, the previous film pulse state (LOW level or HIGH level) is stored (in a register), the current film pulse state is read, and the state is stored (in a register) (S402 to S40).
3).

Then, it is checked whether or not the current film pulse is at the high level. If the current film pulse is at the high level (S404: Y),
It is checked whether the previous film pulse is at the LOW level (S405). If the previous film pulse is not at the low level (S405: N), the state of the film pulse remains at the high level and the operation returns as it is. If the previous film pulse is at the low level (S405: Y), the rising edge of the film pulse Is detected, so the film pulse width measurement counter (edge_width_tim
e) The value of low pulse width (time) (low_edge_width_tim)
e) is stored (S406), and the film pulse width measurement counter (edge_width_time) is cleared to 0 to measure the time during which the film pulse maintains the HIGH pulse (S409). Next, the number of film end edges (ee_film_
It is checked whether (end_edge) is 0 (S410). If it is not 0 (S410: N), since the count of halfway film edges less than one frame at the end of the film is not completed, 1 is decremented from the number of film end edges (ee_film_end_edge) and the process returns (S412). If the number of film end edges is 0 (S410: Y), an edge counter (edge) is used to count edges in the film rewind direction.
_counter) is incremented by 1 (S411). Subsequently, it is checked whether or not the edge counter (edge_counter) is 16 (S413), and if it is not 16, (S413: N).
Returns, and when it reaches 16 (S413: Y), film 1
Since eight perforations for the frame have passed, the edge counter (edge_counter) is set to 0, and the film frame number counter (ee_film_counter) is decremented by 1 to return the edge of the next film frame (S414, S415).

If the current film pulse is at the LOW level (S
(404: N), it is checked whether or not the previous film pulse is at the high level. If the previous film pulse is not at the high level (S407: N), the state of the film pulse is still at the low level, so that the routine returns. If the previous film pulse is at the high level (S407: Y), it means that the falling edge of the film pulse has been detected, so the film pulse width measurement counter (edge_width_time) at that time is set to the high pulse width (hig
h_edge_width_time) (S408), and the process proceeds to S409.

Next, the data imprinting process of S305 is shown in FIG.
This will be described in detail with reference to FIGS. FIG.
It is a figure which shows a data imprinting process with a flowchart. First, ON / OF of the data imprinting permission switch 54
By confirming F, it is checked whether or not the imprinting of the data on the film 14 is permitted. If not, the process returns because there is no need to imprint the data (S501: N). If data imprinting is permitted (S501: Y), it is checked whether or not the film frame number counter (ee_film_counter) in the EEPROM 51 is 1 or more.
If not, return (S502: N). If 1 or more, return (S5
02: Y), data imprint start flag (F_PRINT_START)
Is checked, that is, whether data imprinting is in progress (S503). If the data imprinting start flag (F_PRINT_START) is 1 (imprinting process is in progress), the process returns (S503: Y).
It is checked whether or not the value of (_counter) satisfies the following expression (S503: N, S504). edge_counter = (print_item_cou
Here, print_item_counter (data imprinting item counter) is a counter that indicates the number of data to be imprinted on one frame of film. For example, in a case where the aperture value AV is printed in an area between perforations 3 and 4 in FIG. 14, print_it
Since em_counter = 1, edge_counter = 6.
That is, when the number of edges of the film pulse is counted, the process for imprinting on the area between the third and fourth perforations is started. If the check result is N, the process returns (S504: N), and if the check result is Y (S504: Y), conversion / setting of the imprint data (S505) is performed (details will be described later). EEPROM5 in S202
The data written in 1 is converted into actual imprint data.

Next, a printing start delay time (S506) and a printing cycle (S507) are calculated and set. The formula for calculating the imprint start delay time is: reference delay time x (measurement film pulse HIGH time / reference film pulse HIGH time). The reference delay time is an imprint start delay time (an imprint start delay time D shown in FIG. 14) determined so that imprinting starts from a predetermined position between adjacent perforations at an arbitrarily determined reference speed of the film. ), And the reference film pulse HIGH time is the high pulse width (high_edge_width_time) at the same reference speed. The measured film pulse HIGH time is the high pulse width (high_edge_width_time) of S408. The reference delay time and the reference film pulse HIGH time are determined in advance and stored in the EEPROM5.
1 is stored. The formula for the printing cycle is: reference cycle x (measured film pulse HIGH time / reference film pulse HIGH time). The reference cycle is a printing cycle determined so as to have a predetermined character width at an arbitrarily determined reference film speed. The measurement film pulse HIGH time is a high pulse width (high_edge_width_time) of S408. The film pulse HIGH time is determined in advance and stored in the EEPROM 51. By rewriting the values of the reference delay time and the reference cycle stored in the EEPROM 51, the printing start position and the character width can be easily changed.

Subsequently, the IS obtained by reading the DX code
Copying time from O sensitivity, that is, copying LED 11
Is set (S508), and the imprint dot counter is set to 0 (print_counter = 0) (S509). The imprint dot counter (print_counter) is a counter for obtaining the number of columns on which imprint data dots have been imprinted in the film running direction. Next, in order to permit interruption of the timer 1 and perform printing from a desired position, S5
A printing start delay time timer for delaying the start of printing by the value set in 06 is started, a data printing start flag is set, and the process returns (S510 to S512).

Here, the interrupt processing routine of the timer 1 will be described. FIG. 11 is a flowchart showing the interrupt processing of the timer 1. This flow is an interrupt processing routine for turning on the imprint LED 11 to imprint data after the interruption of the timer 1 is permitted in S510 of FIG. In this process, first, the interruption of the timer 1 and the timer 2 is prohibited (S601, S602). Then, the imprint dot counter (print_counter) is 23
Is checked (S603). In the present embodiment, four characters with a width of one character and five dots are printed at a character spacing of one dot between one perforations (see FIG. 15), and 23 dots including one dot between characters are printed. Check If print_counter = 23, the printing to one inter-perforation area has been completed, so the printing LED 11 is turned off (S605), and the data printing start flag (F_PRINT_START) is set to 0 (S60).
6), return. If print_counter is not 23 (S6
03: N), LE to be turned on set in S505 corresponding to the numerical value indicated by the imprint dot counter (print_counter)
The projection LED 11 is turned on based on the data of D (S60).
Four).

Next, a printing dot counter (print_co
increments “1” to “unter”, and allows the interruption of the timer 1 in preparation for imprinting the next dot row (S607, S6)
08). Subsequently, the imprint period (F) set in S507, the timer 1 is started, the interruption of the timer 2 is enabled, and
The timer 2 corresponding to the imprint time (G) set in 08 is started (S609 to S611). The interrupt processing routine of the timer 2 is shown in the flowchart of FIG. This flow is an interrupt processing routine for turning off the imprinting LED 11 lit in the timer 1 interrupt processing routine. This process is a two-step process (S701, S702) for turning off the imprinting LED 11 and disabling the timer 2 interrupt.

A description will now be given of the process of converting and setting the imprint data in S505. FIG. 13 is a diagram showing the flowchart. First, the data imprint item counter (print_it
em_counter) is checked (S801). If the data imprint item counter is 0, EE will be used during release processing.
Among various data stored in the PROM 51, TV data (shutter speed) of a film frame corresponding to the value of the film frame number counter (ee_film_counter) is converted and set (S802). If the data imprint item counter is 1,
Similarly, convert and set AV data (aperture value) (S80
3). If the data imprint item counter is 2, the XV data (exposure correction value) is similarly converted and set (S80).
Four). If the data imprint item counter is 3, the exposure mode data is similarly converted and set (S805). If the data imprint item counter is 4, the film serial number data is similarly converted and set (S806). If the data imprint item counter is 5, the focal length data is similarly converted and set (S807). If the data imprint item counter is 6, the metering mode data is converted and set (S8
08).

After each data is converted and set, the data copy item counter (print_item_counter) is incremented by 1 to convert and set the data of the next item (S809). Data imprint item counter (print_item_c
If (ununter) is not 5, the program returns as it is because the data to be copied still remains (S810: N). And the data imprinted item counter (print_item_counter) is 5
If (S810: Y), since no more data is to be printed, 0 is set in the data-printed item counter (print_item_counter) (S811) and the routine returns. 14 and FIG.
The example of No. 6 is an example in the case where the number of data imprinting items is 5, the focal length of print_item_counter = 5 and the print_ite
The metering mode data of m_counter = 6 is not printed. When these data are imprinted, the value of the data imprint item counter (print_item_counter) in S810 is set to “7”. This data imprinted item counter (prin
The value of (t_item_counter) can be stored in the EEPROM 51 and changed by a predetermined operation.

As shown in the above embodiment, the EEPROM 51
By rewriting the parameters such as the reference delay time, the reference cycle, and the number of data imprinting items stored in the memory, it is possible to easily change the imprint start position, the width of imprinted characters, and the like. If a switch mechanism or the like for rewriting data in the EEPROM 51 is provided inside the camera, there is no need for troublesome mechanical adjustment as in the related art.
The parameters can be easily rewritten during manufacturing. Further, a similar switch mechanism may be provided externally so that the change can be made on the user side.

In the above embodiment, a case has been described in which data is imprinted when the film is rewound, but data may be imprinted when the film is rewound. Further, in the present embodiment, the case where data is imprinted on an area between perforations has been described, but the present invention is also applicable to the case where data is imprinted on another area on the film surface.

[0029]

As is apparent from the above description, according to the camera to which the present invention is applied, when data such as photographing data is to be printed on a film surface, means for controlling the position at which the data is started to be printed, and Since the means for controlling the width of the data in the horizontal direction is provided, it is possible not only to make the width of the data constant but also to print the data within a predetermined range from a desired position. Further, since the parameters necessary for the imprinting control are stored in the non-volatile storage element, it is possible to easily change the imprinting start position and the data width.

[Brief description of the drawings]

FIG. 1 is a rear view of a camera to which the present invention is applied, with a back cover opened.

FIG. 2 is a sectional view of the camera taken along the line II of FIG. 1;

FIG. 3 is a sectional view of the camera taken along the line II-II of FIG. 1;

FIG. 4 is a top view of a perforation detection unit of a camera to which the present invention has been applied.

FIG. 5 is a block diagram of a control circuit of the camera to which the present invention is applied.

FIG. 6 is a flowchart showing a program of a main routine of the camera to which the present invention is applied.

FIG. 7 is a flowchart showing a control program of a release process of a camera to which the present invention is applied.

FIG. 8 is a flowchart showing a control program for imprinting data when rewinding a film of a camera to which the present invention is applied.

9 is a diagram showing a subroutine of a control program shown in FIG. 8 with a flowchart.

FIG. 10 is a diagram showing, with a flowchart, data imprinting processing of a camera to which the present invention has been applied.

FIG. 11 is a diagram showing, with a flowchart, interrupt processing of a timer 1;

FIG. 12 is a diagram showing, with a flowchart, interrupt processing of a timer 2;

FIG. 13 is a diagram showing a process of conversion and setting of imprint data with a flowchart.

FIG. 14 is a diagram showing, with a timing chart, a correlation between perforations of a camera to which the present invention is applied and each pulse signal.

FIG. 15 is an enlarged view of a main part of the timing chart shown in FIG. 14;

FIG. 16 is a diagram showing a film on which data is captured by a camera to which the present invention is applied.

[Explanation of symbols]

 REFERENCE SIGNS LIST 11 imprinting LED 12 imprinting optical system 12a imprinting portion 13 back cover 14 film 16 shutter unit 17 pressure plate 18 back cover base plate 19 flexible printed circuit board 20 connect pin 21 main body 22 rewinding fork 23 main body side connector section 24 spool 25 sprocket 25a Gear 26 DX Contact 28 Detection Board 28a 28b Output Terminal 29 Brush 30 Projection 31 Gear 32 Cartridge Chamber 33 Spool Chamber 34 CPU 35 DC / DC Converter 36 Voltage Regulator 37 Battery 38 Motor Driver IC 39 Mirror Motor 40 Motor Driver IC 41 Film Motor 42 Shutter control circuit 43 Aperture control circuit 44 Oscillator 45 Clock IC 46 Photometry IC 47 AVVR 48 LCD in viewfinder 49 Lighting ED 50 External LCD 51 EEPROM 52 Data imprint circuit 53 DX code identification circuit 54 Data imprint enable switch 55 Mirror down switch 56 Mirror up switch 57 Film load switch 58 Film switch 59 Rewind switch 60 Back cover open / close switch 61 Main switch SWR Release Switch SWS photometric switch

Claims (14)

[Claims] 1. A camera having a perforation detecting means for detecting that an edge of a perforation has passed a predetermined position while a film is running, and a printing means for printing data between two adjacent perforations of the film. Film speed measuring means for measuring the running speed of the film; and the data imprinting means imprinting data based on the detection time detected by the perforation detecting means and the measured film running speed detected by the film speed measuring means. And a printing start position control means for controlling a start position of the camera. 2. A camera with a data imprinting function according to claim 1, wherein said film speed measuring means measures a film running speed based on an edge passing time between perforations detected by said perforation detecting means. Camera with data imprint function. 3. The camera with a data imprinting function according to claim 1, wherein said imprinting start position control means controls the imprinting of said film when said perforation detecting means detects a predetermined edge. A camera having a data imprinting function for controlling an imprinting start position based on a distance between an imprinting position and an imprinting position of the data imprinting means and a delay time determined by the film speed measured by the film speed measuring means. . 4. The camera with a data imprinting function according to claim 3, wherein the delay time is determined when the perforation detecting means detects a predetermined edge of perforation at an arbitrarily determined reference film running speed. From, the reference delay time until the arbitrarily determined film imprint start position reaches the imprint position of the data imprinting means, the measured film running speed measured by the film speed measuring means and the reference film running speed Camera with data imprinting function set based on the ratio of 5. The camera with a data imprinting function according to claim 4, wherein said imprinting start position control means comprises:
A camera with a data imprint function that controls the imprint start position based on the perforation edge. 6. The camera according to claim 5, wherein the edge is one edge of an area between perforations immediately before an area between perforations to start imprinting. Camera with imprint function. 7. The data imprinting camera according to claim 4, further comprising a non-volatile storage element storing said reference film traveling speed and said reference delay time. Camera with function. 8. The camera with a data imprinting function according to claim 1, wherein one unit of data to be imprinted is divided into a plurality of units in a film running direction, and the data is divided into a plurality of units. A camera with a data imprinting function having means for sequentially imprinting units in the film running direction during film running. 9. The camera with a data imprinting function according to claim 8, wherein each data unit divided into a plurality is composed of a plurality of rows, and each row is imprinted at a predetermined period according to a running speed of a film. Camera with data imprint function. 10. The camera with a data imprinting function according to claim 9, wherein the predetermined cycle is an imprint cycle of reference data at the reference film running speed, and the reference film running speed and the detected film speed. Camera with data imprint function set based on the ratio of 11. The camera with a data imprinting function according to claim 10, further comprising a non-volatile storage element for storing a reference data imprinting cycle at the reference film running speed. 12. A camera with a data imprinting function according to claim 1, wherein said imprinting start position control means controls, for each frame of said film, a position of an area between perforations for imprinting data first. Camera with data imprinting function. 13. The camera with data imprinting function according to claim 12, further comprising a non-volatile storage element storing the position of the area between the perforations and the number of areas between the perforations for imprinting. Camera with built-in function. 14. The camera with a data imprinting function according to claim 12, further comprising: a non-volatile storage element storing a position of an area between perforations to start said imprinting and a number of items of data to be imprinted. Camera with data imprinting function.