JP3379029B2 - Data imprint camera - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data imprinting camera for imprinting data consisting of desired characters, numbers or symbols on a film.

[0002]

2. Description of the Related Art Conventionally, as an apparatus for imprinting data on a film, for example, imprinting photographed data such as date by transmitting light of a lamp from the back of a liquid crystal having a plurality of characters consisting of 7 segments. The composition was general.
In such a device, the number of characters of data printed on the film at one time is limited by the size of the liquid crystal,
The types of characters imprinted were limited to numbers and simple symbols. On the other hand, in recent years, a plurality of light emitting elements are continuously arranged in a direction orthogonal to the film running direction, and the plurality of light emitting elements are blinked in synchronization with the feeding operation of the film, thereby imprinting data on the film surface. Various devices have been proposed.

However, in the electric hoist type camera, the film feeding speed greatly changes depending on the type of film, the power supply state of the feeding circuit, the temperature, the number of frames to be photographed, and the like, so that a plurality of light emission is always performed at a constant time interval. When the element is made to blink, there is a problem in that the dot intervals of the imprinted characters and the character intervals of the imprinted characters become uneven, and the imprinted characters are not aligned and are unsightly.

As means for solving the above problems, Japanese Patent Laid-Open No.
Japanese Patent No. 233531 and the like disclose a technique of detecting a moving amount of a film by using a roller as shown in FIG. 1 and controlling an imprinted character based on the detected moving amount.

In the figure, P is a film cartridge, F is a film, and Fa is a photographic screen. The film F is sandwiched between the detection roller 1 and the support roller 2 and is coaxial with the detection roller 1 which rotates when the film F moves. By detecting the rotation of a certain slit plate 3 with the photo interrupter 4, the amount of movement of the film is detected with high accuracy.

However, in this publication, since a pair of rollers for detecting the amount of movement of the film must be arranged in a limited space near the photographing screen, the degree of freedom in design is small and compactness is required. The camera was extremely disadvantageous.

[0007]

In view of the above problems, the present invention realizes a data imprinting camera in which the amount of film movement is detected and the characters are aligned without being restricted by the space near the photographing screen. is there.

[0008]

According to the present invention, a plurality of light emitting elements forming one dot of data consisting of letters, numbers, or symbols are continuously arranged in a direction orthogonal to the film feeding direction. Film position detection that generates a pulse each time the perforation of the film to be fed is detected in a data imprinting camera that imprints the data on the film surface by blinking the light-emitting element in synchronization with the film feeding operation. Means, a motor rotation angle detecting means for generating a pulse each time a predetermined rotation angle is detected in association with the rotation of the film feeding motor, and the motor rotation for a predetermined film feeding amount for each number of photographing frames. The storage means for storing in advance the number of pulses generated by the angle detecting means and the pulse generated by the film position detecting means keeps the exposed film at a predetermined position. When it is determined that the motor rotation angle detection means has started the counting operation of the number of pulses generated by the motor rotation angle detection means, the time measurement operation is started at the same time. When counting, the counting operation of the pulse generated by the motor rotation angle detecting means is ended, and at the same time, the time measuring operation is ended, and the predetermined pulse number, the measuring time, and a predetermined film feed prestored in the storage means. Based on the number of pulses generated by the motor rotation angle detection means with respect to the feeding amount, by calculating the film feeding time with respect to a predetermined film feeding amount, the control means for determining the blinking time interval of the light emitting element. It is achieved by having prepared.

[0009]

Embodiments of the present invention will be described below in detail with reference to FIGS.

FIG. 2 is a basic configuration diagram of a data imprinting camera.

In FIG. 1, the film F has an unexposed portion housed in a cartridge P, and the exposed portion is wound around a reel 15.

The feeding motor 11 rotates every time one frame is photographed,
The rotation is transmitted to the reel gear 14 via the reduction gear group 13 connected to the pinion 12 which is coaxially supported. Since the reel gear 14 and the reel 15 are integrally connected, the film F is wound on the reel 15 every time one frame is photographed.

A disk-shaped slit plate 17 is pivotally supported on the shaft of the feeding motor 11. The slit plate 17 has a large number of slits formed in a radial pattern from the center, and the photo interrupter 18 is arranged with the slit plate 17 interposed therebetween.
The photo interrupter 18 outputs a motor rotation angle detection signal as a pulse to the microcomputer 21 each time the slit of the slit plate 17 is detected.

In this embodiment, the slit plate 17 is mounted coaxially with the feed motor 11, but the slit plate 17 is intended to detect the rotation angle of the feed motor 11, so that the deceleration is performed. It may be attached to any shaft of the gear group 13. Further, another gear may be meshed with the pinion 12 or the reduction gear group 13, and the gear may be axially attached to the gear.

The two-dot chain line in the center of the film F is the photographing screen F.
2a, and the two-dot chain line on the reel 15 side shows the photographed screen Fb moved in the direction of the reel 15. In front of the photographed screen Fb, a plurality of light emitting elements 22 are continuously arranged at predetermined intervals in a direction orthogonal to the film traveling direction, and the light emitting elements 22 are connected to the microcomputer 21 by a data imprinting control circuit 23. The light emission is controlled by. The light emission of the light emitting element 22 is guided through the imaging lens 24 to the photographed screen Fb which is being fed each time the one frame photographing operation is completed, whereby the dot matrix data is imprinted.

The measurement start position of the film feeding time per unit length and the data transfer start position are determined by detecting the perforation Fc of the film by a reflection type photo interrupter 25 which is a film position detecting means. There is. The reflective photo interrupter 25 is a film F
The reflecting plate 26 is provided on the emulsion side of the film F. The reflection type photo interrupter 25 uses the difference in the amount of light reflected from the reflection plate 26 to change the perforation Fc.
Is detected and a pulse which is a film position detection signal is output to the microcomputer 21.

The reflection type photo interrupter 25 may be replaced with a sprocket gear which has been conventionally used.

The blinking interval of the light emitting element 22 is determined by calculating the rotation angle of the reel 15 by detecting the rotation angle of the feeding motor 11 and obtaining the feeding amount of the film F as described later. ing.

FIG. 3 is a timing chart for feeding one film of film. The upper part shows the control of the feeding motor 11, and the lower part shows the pulse generated by the reflection type photo interrupter 25, that is, the film position detecting means (hereinafter referred to as SSP). Is called).

FIG. 4 shows the SSP pulse width (time) of 1,
Measured at each of 6, 11, 16, 21, 26, 31, 36
It is a plot. As shown in the figure, the feeding state of the film F is unstable due to a sudden change in the rotation speed of the feeding motor 11 immediately after the feeding is started, but after the fifth perforation (section 5 in FIG. 3) and thereafter. It turns out that it is almost stable. Therefore, in the present invention, the data is imprinted in the latter half of the film feeding which is the section 5 and thereafter.

FIG. 5 is a block diagram of this embodiment.

The components shown in FIG. 2 and the components shown in FIG. 2 generally correspond to each other, and the microcomputer 31 feeds the data to the microcomputer 21, the feeding motor 30 feeding the film feeds the film to the feeding motor 11, and the light emitting element 32 imprinting the data. Corresponds to the light emitting element 22 and the data imprinting control circuit 33 corresponds to the data imprinting control circuit 23, but a motor driver 34 for driving the feeding motor 30 in response to a command from the microcomputer 31.
Is not drawn in FIG. The film position detecting means 35,
It includes the reflection type photo interrupter 25 and the reflection plate 26 of FIG. 2, and receives the power hold signal PH1 and outputs SSP. The motor rotation angle detecting means 38 is the slit plate 17 of FIG.
And a photo interrupter 18, which receives a power hold signal PH2 and outputs a pulse (hereinafter referred to as FDP).

FIG. 6 is a data transfer timing chart. The data imprinting control of the present invention will be described with reference to FIG.

When the microcomputer 31 determines that the photographed film has been fed to the predetermined time measurement position by the SSP generated by the film position detection means 35, it starts the FDP counting operation generated by the motor rotation angle detection means 38. At the same time, the time measuring operation is started, and at the same time when the counting of the predetermined number of FDPs generated by the motor rotation angle detecting means 38 is completed, the time measuring operation is ended. Then, the calculated time is divided by the counted FDP to obtain the time per pulse of the average FDP, that is, the pulse width. For example, the calculation is performed by measuring the time for 64 pulses of FDP and dividing the measured time by 64.

Then, the calculated pulse width is set to the microcomputer 31
The number of FDP pulses for a predetermined film feed amount stored in advance in the ROM is multiplied to calculate the film feed time for the predetermined film feed amount.

Note that the FDP pulse number p for a predetermined film feed amount Δx in the number of frames i is approximately expressed by the following mathematical formula 1. Here, for example, the value of p when i = 1 indicates the number of FDP pulses with respect to a predetermined film feed amount Δx at the position where the first frame has been wound up. FD for a predetermined film feed amount Δx at the position where the film is half fed)
To obtain the number of pulses of P, it is necessary to represent it by a number including a number after the decimal point such as i = 0.5.

[0027]

[Equation 1]

Where k = reduction ratio of reel gear to pinion r ₀ = radius of film winding portion of reel s = number of slits of slit plate d = film thickness x = film feed amount x per frame ₀ = Film feeding time for a given film feeding amount is calculated by calculating more than the number of film feeding frames during autoloading. Therefore, the feeding time can be calculated in the film feeding direction necessary for data imprinting. Dividing by the number of dots gives the blinking time interval of the light emitting element. Then, by imprinting at the determined blinking time interval, data with imprinted characters are obtained on the film surface.

For example, it is assumed that six perforations are detected and 51 dots of data for each light emitting element are projected in the following one perforation, and various conditions at that time are as follows.

K = 1/200 r ₀ = 7 mm s = 6 d = 0.15 mm x = 38 mm x ₀ = 4 frames Δx = 4.75 mm At this time, the printing position for each number of shooting frames in the ROM of the microcomputer The number of FDP pulses for one perforation is calculated by Equation 1 and stored in advance in the storage means as the FDP table shown in Table 1.

[0031]

[Table 1]

Then, the number of stored pulses is multiplied by the average FDP pulse width obtained by measurement to find the time for one perforation feeding of the film, and the feeding time is determined by the number of imprinting dots (51 in the film feeding direction). Dot) to find the blinking interval of the light emitting element.

In this embodiment, the storage means is the R of the microcomputer.
Although it is OM, this can be stored in the E ² PROM.

The film feeding time is detected immediately before the data is imprinted so that the FDP pulse width at the time measuring position and the FDP pulse width at the data imprinting position do not differ. Further, as described with reference to FIG. 4, since the film feeding speed is stable after the section 5, the pulse width of the FDP does not change if the time measurement operation and the data imprinting operation are performed after the section 5. .

The point to be noted here is that the pulse width of the FDP changes when the film feeding time changes, that is, if the pulse width of the FDP is detected, the fluctuation of the film feeding time changes. It means that it can be detected. Therefore, if the FDP is detected during the data imprinting operation and feedback is applied to the data imprinting control based on the information of the FDP during the imprinting operation, the imprinted data will be more uniform characters.

FIG. 7 shows the control of each imprinting character interval with respect to the variation of the film feeding time during the data imprinting operation,
6 is a timing chart of an embodiment in which a stable character spacing can be obtained.

In FIG. 7, t ₁₁ , t ₁₃ and t ₁₅ are areas in which the blinking of the light emitting element 32 is controlled by the film feeding time obtained immediately before the data imprinting, and t ₁₂ and t _14.
Is an area in which the imprinted character interval is controlled by the data stored in the microcomputer 31. In the region of t ₁₂ and t ₁₄ , due to the fact that the pulse width of the FDP is proportional to the film feeding time, the rising of the FDP is repeated a predetermined number of times (P ₀
By detecting the number of times, the fluctuation of the character spacing due to the fluctuation of the film during feeding is kept constant. That is, since the number of FDP pulses when the film is fed by a predetermined amount is only determined by the formula 1, changing the film feeding time means changing the FDP pulse width.

In the present embodiment, in order to keep the areas t ₁₂ and t ₁₄ always constant, the number of FDP pulses for determining the character interval is calculated in advance for each photographing frame by using the mathematical formula 1.
The character spacing table shown in Table 2 is stored in the ROM of the microcomputer.

[0039]

[Table 2]

It should be noted that the storage means may be stored in the E ² PROM as in the case of the above embodiment.

FIG. 8 is a timing chart of an embodiment in which the imprinting start position of each imprinted character is controlled with respect to the variation of the film feeding time during the data imprinting operation so that the data can always be imprinted at a fixed position. Is.

In FIG. 8, t ₂₁ , t ₂₃ and t ₂₅ are regions for controlling the blinking of the light emitting element by the film feeding time obtained immediately before the data imprinting, and t ₂₂ is the second region. FD until the start of imprinting of the imprinted data block of
This is a region where the number of P pulses is counted, and t ₂₄ is
This is an area in which the number of FDP pulses until the start of imprinting of the third imprint data block is counted.

In the region of t ₂₂ and t ₂₄ , based on the fact that the pulse width of FDP is proportional to the film feeding time,
FDP rises a predetermined number of times (C ₀ times in the area of t ₂₂ ,
By detecting C ₁ times in the area of t ₂₄ ), the imprint start position of each imprint character with respect to the variation of the feeding time is kept constant.

When the imprinting end position of the first block exceeds the area of t ₂₂ , the imprinting start position of the second block is shifted to the imprinting end position of the first block. Control is performed to eliminate the problem that each imprinted data is only partially visible.

Here, the number of FDP pulses in the areas of t ₂₂ and t ₂₄ is obtained in advance from the number of FDP pulses stored in advance and the number of imprinting start dots of each imprinted character. For example, assuming that the FDP pulse stored in advance is 102, the total imprinting dot number is 51, and the imprinting start dot number of the second imprinting block is 23, the FD of the area at t ₂₂ is
The number of P pulses is 102/51 × 23 = 46 pulses.

In the embodiment of FIGS. 7 and 8,
Although the date imprinting data is controlled by being divided into three data blocks of year, month, and day, it is also possible to control each imprinting character.

In the control system shown in FIGS. 7 and 8,
In order to further improve the accuracy, the number of slits of the slit plate 17 for detecting the motor rotation angle may be increased to increase the number of FDP pulses for a predetermined film feed amount.

In the data imprinting apparatus of the present invention, imprinting control is performed based on the FDP pulse number information stored in advance for each photographing frame. Therefore, the battery can be replaced while the film is being photographed. If the shooting frame counter is reset by opening the back cover or opening the back cover, the number of shooting frames (0 in this case) stored in the microcomputer 31 of the camera is different from the actual number of shooting frames, which causes inconvenience. . Therefore, the data imprinting apparatus of the present application measures the number of FDP pulses with respect to a predetermined film feeding amount as shown in Table 3 during film autoloading, and corrects the table of the number of FDP pulses stored in advance. .

[0049]

[Table 3]

For example, assuming that the number of FDP pulses stored in advance is as shown in Table 1, the results of measuring the number of FDP pulses with respect to a predetermined film feeding amount during film autoloading are shown in Table 3. If so, it can be seen that the actual number of frames to be photographed is the eighth frame. Depending on the timing of measurement, the number of FDP pulses may not completely match the data in Table 1.
The information of the closest frame number is selected from the information of the pulse number of the FDP of the frame.

Next, an embodiment of the data imprinting apparatus of the present application will be described in detail with reference to the flow charts shown in FIGS.

In the main routine of FIG. 9, the camera in the image-capable state is always waiting at 101 in the state of waiting for the release operation of the photographer. When the release SW is pressed and turned on, light exposure is performed at 102, distance measurement is performed at 103, focusing operation for focusing the taking lens at 104, and shutter opening / closing operation at 105 are performed to expose the unexposed film. After shooting, the shooting lens is returned to the initial position at 106, the film is wound up one frame at 107, and at 108, the release SW is released and waits until it is turned off. Data is imprinted in conjunction with the film winding operation in 107.

Next, the film winding operation relating to the data imprinting camera of the present invention will be described in more detail with reference to the film winding operation subroutine of FIG.

First, at 111, SSP counter, FD
The values of the P counter and the time measuring timer of the FDP are reset, and at 112, the motor rotation angle detecting means 38 and the film position detecting means 35 are turned on. After that, the feeding motor 30 is rotated in the forward direction at 113 to enter the film winding state. Since the state of the SSP signal must be constantly detected during the film winding operation, the FDP time measuring operation and the data imprinting operation are performed by an interrupt process.

The film feeding position is detected by detecting a change in the SSP signal (detection of rising and falling edges). At first, by waiting for "H" of the SSP signal at 114, the feeding position is detected. The starting point is always kept constant. S
After waiting for the SP signal "H", the SSP signal "L" is waited at 115, the SSP flag is reset at 116, and the SSP counter is counted up at 117. After that, depending on the state of the SSP flag, it branches to wait for 115 SSP signal "L" at 118 or wait for SSP signal "H" at 119, and
16 resets the SSP flag, 120 resets the SSP flag, 117 increments the SSP counter,
Each processing is performed according to the value of the SSP counter.

When the SSP counter value is 9 at 121, the FDP rising interrupt is permitted at 122 to start the FDP time measurement operation, and at 123, the measurement timer is started. Here, the microcomputer executes the FDP interrupt processing subroutine every time the rising edge of FDP is detected.

In the FDP rising interrupt processing subroutine of FIG. 11, the FDP counter is counted up every time the rising of the FDP is detected by 131, and when the value of the FDP counter becomes 64 at 132, the measurement timer is stopped at 133. , 134
Stops the FDP rising interrupt and ends the FDP time measuring operation. After the time measurement operation is completed, the value of the measurement timer is divided by 135 by the number of FDP pulses (64 pulses) to calculate the average FD.
The pulse width of P is obtained and stored in A. In addition, from the FDP table of Table 1 stored in advance in 136, the imprint position 1
Set the number of FDP pulses for perforation P, and multiply A by P at 137 to find the speed at which the film feeds by one perforation. The feeding speed is imprinted on the number of dots (for example, transfer in the film feeding direction). The number of dots is set to 51.), and the blinking interval of the light emitting element of the imprinting is calculated and stored in B. At 138, the light emission time of the light emitting element and the interrupt processing time of the imprint timer are subtracted from B to obtain the imprint interrupt interval C.

In 140 in FIG. 10, when the film is fed and the value of the SSP counter reaches 12, the value of the interrupt interval C is set in the imprint timer at 141, and the imprint timer interrupt is set at 142. The permission is permitted, and the imprinting timer is started at 143 to start the data imprinting operation. here,
When the value of the imprint timer becomes 0, an interrupt occurs and the imprint timer interrupt processing subroutine is executed.

In the imprint timer interrupt processing subroutine of FIG. 12, the imprint data corresponding to each imprint position is set in 151, and the imprint element is caused to emit light in accordance with the imprint data, and the data is recorded on the film. Imprint. If the imprinting is not the 51st dot in 153, the value of C is set in the imprinting timer in 154, and the imprinting timer is restarted in 155. 153 If the imprint is the 51st dot, the imprint timer interrupt is disabled at 156, and the imprint of the data ends.

At 160 in FIG. 10, when the film is further fed and the value of the SSP counter reaches 15, the FD is fed at 161.
P Rise interrupt and imprint timer interrupt are prohibited, 162 applies reverse brake to the feed motor, 163 applies short brake, 164 stops feed motor energization, and 165 detects motor rotation angle detection means. The power of 38 and the film position detecting means 35 is turned off, and the film winding operation is completed.

Next, with reference to the flow charts shown in FIGS. 10, 13 and 14, the respective imprinting character intervals with respect to variations in the film feeding speed during the data imprinting operation are calculated by using the FDP information during the data imprinting operation. A description will be given of an embodiment in which more stable control can be performed to obtain a stable character spacing. The present embodiment is an example of the case in which the date imprinting data is controlled by being divided into three data blocks of year, month, and day.

In this embodiment, only the FDP interrupt processing routine and the imprinting timer processing subroutine are different from the above-mentioned embodiments, so that point will be described.

The FDP interrupt processing subroutine is shown in FIG.
This is executed not only when the value of the SSP counter becomes 9 in 121, but also during the data imprinting operation. In the FDP interrupt processing subroutine of FIG. 13, it is determined in 201 whether it is a time measurement operation, and if it is a time measurement operation, 202 to 209
When the same processing as the FDP interrupt processing subroutine of FIG. 11 is performed and it is not the time measuring operation (when each imprinting character interval is controlled by the information of FDP), the imprinting timer interrupt processing subroutine is executed in 210 in the FDP counter. Count down the set value (P ₀ ). Here, the character interval of data imprinting is kept constant by counting a predetermined number of FDPs. When the value of the FDP counter becomes 0 in 211, the FDP rising interrupt is prohibited in 212, the value of C is set in the imprinting timer in 213, and 214
Enables the imprint timer interrupt at, and restarts the imprint timer at 215 to imprint the data.

The copy timer interrupt processing subroutine of FIG. 14 is obtained by adding two branch processes to the copy timer interrupt processing subroutine of FIG. Set the imprinting data at 161, and after the light emission of the data imprinting element at 162, if the 19th dot of 163 or the 35th dot of 168 emits light, disable the imprinting timer interrupt of 164 or 169, 165 or At 170, 4 dots are added to the imprinting completion dot and stored as the 23rd dot or the 39th dot, respectively. Then, the number of FDP pulses P _{0 corresponding} to the character spacing at the imprinting position is set in the FDP counter from the character spacing table of Table 2 stored in advance in 166, and FDP is set in 167.
Enable rising interrupts. If 168 is not for 35 dots, processing is performed at 171-174 as in FIG.

Next, using the flowcharts shown in FIGS. 10, 15 and 16, the imprinting start position of each imprinting character with respect to the fluctuation of the film feeding speed during the data imprinting operation is determined during the data imprinting operation. Control from the FDP information of
A description will be given of an embodiment in which the data can always be projected at a fixed position. The present embodiment also shows an example in which the date imprinting data is divided into three data blocks of year, month, and day and controlled.

In this embodiment, in 140 in the film winding operation subroutine of FIG. 10, when the value of the SSP counter is 12, the FDP counter of 301 is reset and the FD of 302 is reset.
P rising interrupt permission is added. Then, along with the data imprinting operation, the FDP counting operation is performed, and feedback is applied to the data imprinting.

Similar to the above-described embodiment, the FDP interrupt processing subroutine of FIG. 15 is executed not only when the value of the SSP counter reaches 9, but also during the data imprinting operation. In FIG. 15, it is determined in 311 whether or not the time measurement operation is performed. In the case of the time measurement operation, the same processing as the FDP interrupt processing subroutine of FIG. 11 is performed in 312 to 319. When the imprinting start position is controlled by the FDP information), the FDP counter is counted up at 320, and the following processing is performed according to the value of the FDP counter.

When the FDP counter is C ₀ at 321 and is 1 at 322
It is judged whether the imprinting of the 9th dot is completed, and if it is completed, the value of C is set in the imprinting timer in 323, and 324
In step 325, the imprint timer interrupt is enabled, and in step 325, the imprint timer is restarted. If the imprinting of the 19th dot has not been completed, the FDP counter is counted down at 326, and the same processing is performed again when the FDP interrupt occurs next.

If the FDP counter is C ₁ at 327, 328
Depending on whether or not the imprinting of the 35th dot in is completed, the same processing as in the case of C ₀ is performed in 330 to 333. However, when the imprinting of the 35th dot is completed, F is set at 329.
The only difference is that the DP rising interrupt is prohibited.

The imprinting timer interrupt processing subroutine of FIG. 16 is F at 166 in the imprinting processing routine of FIG.
The DP counter set and the FDP rising interrupt permission of 167 are deleted, and 341 to 352 are the same as those in FIG.

[0071]

According to the invention of the present application, the motor position detecting means and the motor rotating angle detecting means are used as one of the motor rotating angle detecting means.
Based on the number of pulses generated by the motor rotation angle detection means for the stored film feed amount, which is measured by measuring the film feed speed per pulse, the film feed time of the film feed amount for the given film is determined. By performing calculations, the blinking time interval of the light-emitting element can be controlled, so that a set of characters can be displayed in response to variations in the film feeding speed due to film type, feeding circuit power status, temperature, number of frames taken, etc. Data can be imprinted.

Further, the motor rotation angle detecting means can obtain the same effect regardless of where it is arranged in the feeding gear series, so that the unused space in the camera can be utilized, and the freedom for designing the camera compactly can be obtained. The degree increases.

Further, the film position detecting means uses a photoelectric conversion element such as a reflection type photo interrupter in place of the pair of rollers for sandwiching the film, so that the space is greatly reduced as compared with the conventional roller system.

In addition, when the feeding motor is also used as another motor, the motor rotation angle detecting means can also be used, so that space and cost can be reduced. For example, when the feeding motor and the zoom motor are both used, the motor rotation angle detecting means can be used also for the zoom position detection.

[Brief description of drawings]

FIG. 1 is a diagram of a conventional technique.

FIG. 2 is a basic configuration diagram of a data imprinting camera.

FIG. 3 is a timing chart for feeding one frame of film.

FIG. 4 is a diagram in which pulse widths of SSP are plotted.

FIG. 5 is a block diagram of the present embodiment.

FIG. 6 is a data transfer timing chart.

FIG. 7 is a timing chart in which each imprinted character interval is controlled with respect to a film feeding time variation.

FIG. 8 is a timing chart in which each imprinting start position is controlled with respect to a film feeding time variation.

FIG. 9 is a flowchart of a main routine.

FIG. 10 is a flowchart of a film winding operation subroutine.

FIG. 11 is a flowchart of an FDP rising interrupt processing subroutine.

FIG. 12 is a flowchart of a print timer interrupt processing subroutine.

FIG. 13 is a flowchart of an FDP interrupt processing subroutine.

FIG. 14 is a flowchart of a print timer interrupt processing subroutine.

FIG. 15 is a flowchart of an FDP interrupt processing subroutine.

FIG. 16 is a flowchart of a print timer interrupt processing subroutine.

[Explanation of symbols]

F film 3,17 slit plate 11,30 feeding motor 15 reel 18 Photo interrupter 21, 31 Microcomputer 22, 32 light emitting elements 23, 33 Data imprinting control circuit 25 Reflective photo interrupter 35 Film position detection means 38 Motor rotation angle detection means

Claims (8)

(57) [Claims] 1. A plurality of light emitting elements forming one dot of data consisting of letters, numbers, or symbols are arranged in series in a direction orthogonal to the film feeding direction, and the light emitting elements are interlocked with the film feeding operation. In the data imprinting camera that imprints the data on the film surface by blinking the light, the film position detecting means for generating a pulse each time the perforation of the film to be fed is detected, and the rotation of the film feeding motor. The motor rotation angle detection means for generating a pulse each time a predetermined rotation angle is detected, and the number of pulses generated by the motor rotation angle detection means for a predetermined film feed amount for each number of photographing frames are stored in advance. The rotation of the motor when it is determined that the exposed film has been fed to a predetermined position by the storage means to be stored and the pulse generated by the film position detection means. When the counting operation of the number of pulses generated by the angle detection means is started, the time measurement operation is started at the same time, and when the number of pulses generated by the motor rotation angle detection means is counted by a predetermined number of pulses, the motor rotation angle detection means is generated. The time measuring operation is ended at the same time when the pulse counting operation is ended, and the motor rotation angle detecting means for the predetermined pulse number, the measuring time, and the predetermined film feeding amount stored in advance in the storage means is generated. A data imprinting camera, comprising: control means for determining a blinking time interval of the light emitting element by calculating a film feeding time for a predetermined film feeding amount based on the number of pulses. 2. The control means controls the light emitting element based on the determined blinking time interval when it is determined that the exposed film is fed to a predetermined position by the pulse generated by the film position detection means. The data imprinting camera according to claim 1, wherein the data is imprinted on the exposed film. 3. The control means controls the imprinting intervals of a plurality of data based on the number of pulses generated from the motor rotation angle detection means stored in advance in the storage means. The data imprinting camera according to claim 1 or 2. 4. The control means controls the imprinting start position of a plurality of data based on the number of pulses generated from the motor rotation angle detection means stored in advance in the storage means. The data imprinting camera according to claim 1 or 2. 5. The data imprinting camera according to claim 1, wherein photoelectric conversion elements are used for the film position detecting means and the motor rotation angle detecting means. 6. The control means measures the number of pulses generated by the motor rotation angle detection means for a predetermined film movement amount during film autoloading, and the motor rotation angle detection means is stored in advance. 2. The number of photographing frames is corrected by comparing with the number of pulses generated from
The data imprinting camera according to any one of items 1 to 5. 7. A plurality of light emitting elements forming one dot of data consisting of letters, numbers, or symbols are arranged in series in a direction orthogonal to the film feeding direction, and the light emitting elements are interlocked with the film feeding operation. In the data imprinting camera that imprints the data on the film surface by blinking, the motor rotation angle detection means that generates a pulse each time a predetermined rotation angle is detected in conjunction with the rotation of the film feeding motor is provided. A data imprinting camera, characterized in that the imprinting interval of a plurality of data is controlled based on the number of pulses generated from the motor rotation angle detecting means, which is provided and stored in advance in the memory means. 8. A plurality of light emitting elements forming one dot of data consisting of letters, numbers, or symbols are arranged in series in a direction orthogonal to the film feeding direction, and the light emitting elements are interlocked with the film feeding operation. In the data imprinting camera that imprints the data on the film surface by blinking, the motor rotation angle detection means that generates a pulse each time a predetermined rotation angle is detected in conjunction with the rotation of the film feeding motor is provided. A data imprinting camera, characterized in that the imprinting start position of a plurality of data is controlled based on the number of pulses generated from the motor rotation angle detecting means which is provided and stored in advance in the memory means.