JPS6392939A - Data imprinting device - Google Patents

Abstract

PURPOSE:To attain easily observable data imprinting matching respective intervals by fixing a data imprinting means to a prescribed part of a press plate for tightly contacting a film picture with the aperture of a camera. CONSTITUTION:A holder 30 for an imprinting means provided with an imprinting optical system, etc., for imprinting data in respective photographed films at the time of film rewinding is fixed on the press plate 13 at the side end part of a film cartridge 18. Thereby the relative position between the film 12 and the holder 30 is not changed without being influenced by the variation of a photographing optical system and the stop of the film is controlled on the basis of the set position of the holder 30 after stabilizing a film moving speed, so that a frame stop position at the time of imprinting can be accurately obtained. Consequently, easily observable data imprinting matching respective interval can be attained.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application of the Invention) The present invention relates to an improvement in a data imprinting device that imprints data such as the photographing date onto the film surface using a data imprinting means when rewinding the film.

(Background of the Invention) Conventional devices of this type have been proposed to operate in conjunction with the film winding operation, and to operate in conjunction with the film rewind operation. In the device, 1) For example, when using a film with 36 exposures, if the film becomes stretched at the 36th frame and the next frame cannot be wound, data cannot be imprinted on the 36th frame. .

2) For example, if a low-sensitivity film is used, the time required for imprinting becomes long, and rapid shooting cannot be achieved.

3) Since the winding speed fluctuates greatly during winding of the photographic frame, it is difficult to detect the winding speed, and as a result, the intervals between the characters imprinted on each frame vary.

It had the following drawbacks.

On the other hand, if the latter type of device is adopted, the above-mentioned 1)
, 2) can be overcome, but immediately after the start of film rewinding, the effects of the backlash of the gear in the film feeding system and the start-up characteristics of the motor, as well as the effects of Due to warping of the veratin (creating a force against the direction of film movement), the film feeding speed fluctuates greatly (see Figure 7). frame) was difficult.

(Objective of the Invention) The object of the present invention is to solve the above-mentioned problems, to make it possible to imprint data that is easy to see with uniform intervals between each imprinted data, and to make it possible to imprint data that is easy to see and that is aligned in the photographing optical axis direction of the film. To provide a data imprinting device capable of imprinting data without being affected by fluctuations.

(Characteristics of the Invention) In order to achieve the above object, the present invention fixes a data imprinting means to the cartridge side end of the pressure plate, and thereby controls the timing of data imprinting by the data imprinting means when rewinding the film. It is characterized in that the data imprinting means is delayed as much as possible from the start, and the data imprinting means is arranged so as to be linked to fluctuations in the photographing optical axis direction of the film.

(Embodiments of the Invention) Hereinafter, the present invention will be described in detail based on illustrated embodiments.

Figures 1 to 3 show one embodiment of the present invention, and Figure 1 (
a) and (b) are perspective views showing various states when the data imprinting device of this embodiment is attached to a camera, and FIG. 2(a)
(b) and (c) are a plan view, a back view, and a perspective view of the main parts, and FIG. 3 is a block diagram.

In FIGS. 1(a) and 1(b), 1 is a camera body, 2 is a data imprinting device, and 3 is an LCD (liquid crystal display) for externally displaying imprinted data such as the photographing date.

Keys 4 to 11 are used to set and modify the imprint data; 4 is the clear key, 5 is the cursor (4-) key, 6 is the down key, 7 is the up key, and 8 is the cursor (
→) key, 9 is a set key, 10 is an on/off key for setting the imprint flag to 1°° or 0", 11 is a rewind key, 12 is a film, 13 is a pressure plate,
14 is 7 in the direction perpendicular to the unwinding direction of the film 12.
15 is an LED array which is a light source for data imprinting, in which LEDs (light emitting diodes) are arranged;
This is an imaging optical system placed in front of the array 14.

In Fig. 2 (a), (b), and (c), 16 is a battery, 17
18 is a back cover, 18 is a cartridge, and 19 is a film rewind motor that is driven and controlled by a camera control circuit, which will be described later.When the motor 19 rotates, a fork 21 is rotated via a two-stage gear 20, and the fork 21 is rotated through a two-stage gear 20. Rewinding of the film 12 is started. 22 is the aperture, 23 is the film 1
This sprocket has teeth that mesh with the perforations No. 2 and begins to rotate as the perforations move as the film is rewound. 24 is a sprocket gear that is fixed to the upper part of the sprocket 23 and moves in the same way; 25 is a signal gear that rotates when the output of the sprocket gear 24 is transmitted; and 26 is fixed to the lower surface of the signal gear 25. Signal contact piece, 27 is shown in Fig. 2(c)
As shown in FIG. 4, this is a signal board consisting of three patterns 27a to 27c and output pins connected to each other (detailed configuration will be described later with reference to FIG. 4), and the signal contact piece 26 is connected to the board. By sliding, the position of the film 12 and the timing of data imprinting are detected. 28 is a main plate, and 29 is a take-up spool.

30 is a lens holder that holds the imprinting optical system 15 consisting of lenses "1 + L2, and the lenses Ll and L2 are connected to the aperture 22 by screws (not shown).
is held between the pressure plate 13 and the lens holder 30 so as to face the hole 13a formed in the pressure plate 13 at a position as close to the cartridge 18 as possible (see FIG. 2(a)); 31 is a pressure plate spring for urging the pressure plate 13 in the photographing optical axis direction (in the direction of the arrow in FIG. 2(a)) and bringing the film 12 into close contact between the aperture 22 and the pressure plate 13; Fixed LED
It is a board. Reference numeral 33 denotes a main board fixed to the back cover 17, and the main board 33 and the LED board 32 are electrically connected by a flexible board 34, so that the pressure plate 13 is fixed to the photographing optical axis direction of the film 12. Even if the film 12 and the imprinting optical system 1
5 and the LED array 14 do not change.

In FIG. 3, reference numeral 100 is a microcomputer that controls the entire data imprinting device 2.
U100a, RAM100b that stores various data from the camera and information necessary for data imprinting, ROM100 in which data imprinting procedures are programmed.
c, l10100d to 100h. 101 is a crystal oscillator that generates a reference clock; 102 is a crystal oscillator that generates a reference clock;
Operation members corresponding to the various keys 4 to 11 shown in a), 1
03 is a display drive circuit that drives the LCD 3 that displays data for imprinting according to a signal from the microcomputer 100, and 104 is an LE that is a light source for data imprinting.
A light emitting drive circuit causes the D array 14 to blink in accordance with a timing signal from the microcomputer lOO. Reference numeral 105 is an external expansion RAM that stores photographing information from the camera and data for imprinting.

Reference numeral 106 performs camera exposure control and film feeding control according to the film position signal from the signal board 27, as well as shooting information (shot time, aperture value, ISO value, exposure compensation value, etc.), data imprint timing signal, etc. A camera control circuit 107 that transmits the data to the microcomputer 100 in the data imprinting device 2 is turned on and off according to a signal from the camera control circuit 106, and the motor 19
A switching transistor 108 is a switching transistor that turns on or off power to the external RAM 105 when data to be imprinted is stored in the imprint data storage area (details will be described later), that is, a code other than a code indicating blank. This is a switching transistor that is turned on when a code is stored and turned off when the rewind key 11 is pressed.
08 collector and the switching transistor 107
is connected to the base. Note that the switching transistor 108 may be disposed within the data imprinting device 2, and 109 is a battery that is the power source for the rewind motor 19.

Next, the signal board 27 and the signal contact piece 26 that slides thereon will be described in detail using FIG. 4.

FIG. 4(a) shows the signal board 27 fixed to the base plate 28 of the camera. A signal contact piece 26 attached to the lower surface of the signal gear 25 rotates and slides on this signal board 27 in the direction of arrow X when winding the film, and in the direction of arrow Y when rewinding the film. In either case, the signal contact piece 26 is for one frame (for 35 mm film, 3
8mm) When the film is fed, it passes 1 on the signal board 27.
It is configured to rotate. Three types of patterns 27a to 27c are formed on the surface of the signal board 27, and pattern 27c among them is held at a ground (GND) potential.

When the release is performed and the photographing of a certain frame is completed, the control circuit 106 of the camera controls the drive of a winding motor (not shown), and winding of the film 12 is started. Then, the state shown in Fig. 4(a) (all patterns 27
The signal contact piece 26 positioned astride (a to 27c) begins to rotate in the direction of the arrow
7a and 27b are closed and opened with respect to the pattern 27c. Figure 4(C) shows pattern 27a at this time.
.

This shows the output P l + P 2 from 27b, and if the signal contact 26 is located at the position shown in FIG. This state is 5TPI in Figure 4 (C).
corresponds to the position of

As the film winding progresses and the signal contact piece 26 comes to cover the area A of the pattern 27a carved at the pitch angle α, the output P1 corresponding to the pattern 27aI7) l pitch is generated.
The interval λ of the period T of one pulse is the feed amount of the film 12 (
= α/360'X38mm), the output P at that time is a signal that can be turned on and off as many times as the number of times the film 12 is fed (in this example, the area A of the pattern 27a is 43 pitches). By detecting the period T of the output P1 over time, the camera control circuit 106 detects a power drop during film feeding, film tension, etc., which will be described later.

As the film winding progresses further, the output P2 is turned on again, and then the output P1 is also turned on. When the output P2 is turned on, the camera control circuit 106 performs power supply control to a winding motor (not shown), that is, duty control (reducing the effective value of the current flowing to the winding motor) to reduce the winding speed of the film 12. , the next output P! By simultaneously detecting the on state of
1-frame winding) is completed. In addition, even after the power supply to the winding motor is stopped, the chain winding motor actually runs idly, and the film 12 runs idly accordingly, so the signal contact piece 26 is connected to the edge part of the pattern 27a (when rotating in the X direction). initial position)
It rotates from the position shown in FIG. 4(a) and stops. The position of 5TP2 in FIG. 4(C) corresponds to this. Further, the on-period of the output P I + P 2 at each STP position is sufficiently longer than the on-off period in region A of the pattern 27a.

Thereafter, when the release is performed with the signal contact piece 26 located at the 5TP2, the next frame is photographed, and following the completion of the photographing, winding of the frame is started, and the signal board 27 and the signal contact piece are Winding control similar to that described above is performed by the camera control circuit 106 based on the film position signal generated by the camera 26.

FIG. 4(b) shows the state in FIG. 4(C) corresponding to the actual film position. Since the film 12 stops at the 5TP2 position, one frame of shooting is taken as the interval between 5TPI and 5TP2. (38mm for 35mm film)
is determined. When a photograph is taken at this position, the area within the frame is exposed to light, and the subject is captured as a latent image.

In the diagram, Ll indicates the distance from the center of the photographing screen (frame D) to the LED array 14, which is a light source for data imprinting, and Ll and L3 indicate the desired imprinting of data on the film surface ( In this embodiment, it is the distance indicating the position (in which data of up to 30 digits can be imprinted) (details are given using FIG. 4 during the data imprinting operation).

The control circuit 106 of the camera performs winding control (
At the same time, the photographing information such as shutter speed, aperture value, ISO value, exposure compensation value, etc. and the film position signal (the output P 1 + P 2
) in the microcomputer 1 in the data imprinting device 2.
00, the microcomputer 100 to which various data are sent from the camera side is supplied with a basic clock from the crystal oscillator 101, the address is initialized by a reset circuit (not shown), and the microcomputer 100 receives various data from the camera side.
Processing of the data is started according to the contents of 00c.

Here, before going into a detailed explanation of the operation on the data imprinting device 2 side, we will explain the external expansion device that stores the shooting information sent from the camera every time the camera is released and the imprinting data set by the operation member 102. The configuration and storage method in the RAM 105 will be described with reference to FIG.

As shown in FIG. 5, the storage area is divided into an imprint data storage area and a shooting information storage area. /sheet), that is, the capacity for 1080 characters is secured.

When a release is performed for a certain frame while the film 12 is loaded, each piece of information at that time is stored in the imprint data storage area and the photographic information storage area. However, if the setting is not to store data, a blank code is stored in the imprint data storage area and the pointer is advanced to the storage area for the next frame. Furthermore, nothing is stored in the photographic information storage area, and no action is performed to advance the pointer; that is, the photographic information to be stored is stored in the photographic information storage area in the order in which it is sent. When rewinding, the data to be imprinted on the last photographed frame is sequentially read from the data stored in the storage area for the 36th image, for example, for a 36-shot film. .

Whether or not to imprint data on the released frame is determined by whether the flag stored in the RAM 100b, which is set depending on whether or not the on/off key 11 has been operated, is "1" or "0". be done. Further, the photographing information stored in the photographing information storage area is data for later checking under what conditions (sharp, sunset time, aperture value, etc.) each frame was photographed. .

Next, the operation on the data imprinting device 2 side will be explained using FIG.

[Step 1] Data sent from the camera side is received. This initial communication content represents the state of the camera, that is, the release state or the rewind state.

[Step 2] It is determined whether the camera is in the released state or not. If the camera is in the released state, the process proceeds to step 3; otherwise, the process proceeds to step 12.

[Step 3] Receive photographing information data such as shutter speed, aperture value, ISO value, and exposure compensation value for the released frame, and display the information on the LCD 3 via the display drive circuit 103.

[Step 4] It is determined whether or not the film 12 is loaded in the camera. If the film 12 is not loaded, no shooting information or imprint data is stored.
If it is loaded, proceed to step 5.

[Step 5] The operating member 102 checks whether or not the photographing information storage flag is set to "1P" (the key for setting the flag is not shown in FIG. 1(a)).
Judging from the flag 100b, if the flag l'' is set, the process advances to step 6, and if it is not set, the process advances to step 9.

[Step 6] Determine whether or not there is space left in the shooting information storage area where new shooting information can be stored. If there is no storage area left, proceed to step 9; if there is, proceed to step 9. Proceed to Stella 7.

[Step 7] The current photographing information is stored in the pointer indicating the storage position of the photographing information storage area in the externally added RAM 105.

[Step 8] Upon completion of storage, advance the storage pointer.

[Step 9] Check whether or not the imprint data storage flag is set to °1'° by the operation member 102 (the key for setting the flag is not shown in FIG. 1(a)) in the RAM 100b. If the flag is set to "1", the process proceeds to step 10, and if it is not set, the process proceeds to step 11.

[Step 10] Before photographing, while viewing the display on the LCD 3, the imprint data etc. set by operating the operating member 102 are stored in the imprint data storage area corresponding to the frame.

[Step 11] Upon completion of storage, advance the storage pointer.

This completes the process for release.

On the other hand, if it is determined in step 2 that the camera is not in the release state, the process proceeds to step 12 as described above.

[Step 12] Determine whether the camera is in the rewind state, and if it is in the rewind state, proceed to step 1.
Proceed to step 3.

[Step 13] Before the start of the warning display that the film 12 has finished, that is, the rewinding data imprinting operation, a display prompting the user to confirm whether or not the data to be imprinted needs to be corrected is displayed. (as shown in the figure), and outputs an on signal of the switching transistor 108 to the switching transistor 108 to inhibit rewinding (Here, we will proceed assuming that the imprint data is stored in the external expansion RAM 105. ing).

[Step 14] Data is corrected according to the input from the operating member 102.

[Step 15] The switching transistor 10
It is determined whether the off signal No. 8 is being output, that is, whether the rewind key 11 is on or off. If it is off, the process returns to step 14, and if it is on, the process proceeds to step 16.

[Step 16] An off signal for the switching transistor 108 is output to cancel the rewind prohibition.

Here, a detailed explanation of the operations from step 12 to step 16 on the camera side and within the data imprinting device 2 will be given with reference to FIGS. 3 and 4. Since it is not directly related to this, it will be omitted here.

If the frame photographed when the signal contact 26 is located at 5TP2 (area C) in FIG. becomes. As described above, this state is determined by the control circuit 106 of the camera when the on/off signal of output 2 is no longer repeatedly generated even during the winding operation (its period T is longer than a certain period of time). As a result, the power supply to the winding motor (not shown) is stopped, and data indicating that the camera is in the rewinding state is transmitted to the data imprinting device 2 side.

On the other hand, when the above-mentioned data is sent from the camera side, the microcomputer 100 causes the LCD 3 capable of displaying 30 characters to display a warning (not shown) via the display drive circuit 103, and prompts the photographer to At the same time, since the imprint data has been stored in the external expansion RAM 105, a high level signal is output to the switching transistor 108 via l10100h, turning the switching transistor 108 on. shall be. Therefore, even if a high level signal is output from the camera control circuit 106 to the switching transistor 107 in order to shift to the rewinding operation due to film tension detection (from the film position signal), the switching transistor 108 is in the on state. For,
The switching transistor 107 is not turned on (that is, rewinding is prohibited), the rewinding motor 19 does not immediately (automatically) rewind the film 12, and data imprinting is not performed. If not (
If no imprint data is stored in the external additional RAM 107 as described above, the switching transistor 108 remains off, so that the rewinding and accompanying imprinting operation, which will be described later, are immediately started.

The subsequent data correction in step 14 will not be described in detail here, as described above.

Next, when the photographer presses the rewind key 11 to start rewinding, the output from the l10100h in the microcomputer 100 shown in FIG. is turned off. This means that the state of prohibition of rewinding is released. Therefore, the switching transistor 107 is turned on, energization to the first rewind motor 19 is started, and the motor 19 begins to rotate in the rewind direction.

Returning to the explanation of the flowchart in FIG. 6 again, step 1
The operations from 7 onwards will be explained.The operations for each step will be briefly explained, and then the series of them will be explained in detail as described above.

[Step 17] Data sent from the camera side is received.

[Step 18] It is determined whether or not a rewinding start signal has been sent in step 17, and when it is detected that the rewinding start signal has been sent, the process proceeds to step 19.

[Step 19] Data sent from the camera side again, that is, a rewind end signal, an imprint signal, a discard pulse signal corresponding to a period in which imprinting is not performed, etc. (i.e. imprint timing signal) is received.

[Step 20] It is determined whether or not a rewinding end signal has been sent. If it is detected that it has been sent, the process proceeds to step 25; otherwise, the process proceeds to step 21.

[Step 21] It is determined whether or not an imprint signal has been sent. If it is detected that the imprint signal has been sent, the process proceeds to step 22; otherwise, the process returns to step 17.

[Step 22] It is determined whether or not a discard pulse signal has been sent. If it is detected that it has been sent, the process returns to step 19; otherwise, the process proceeds to step 23.

[Step 23] Detected in step 21 above.

One character is imprinted in response to the imprint signal,
When the process is completed, the process proceeds to step 24. Therefore, in this embodiment, this operation is performed a maximum of 30 times in 1 frame.

[Step 24] Set the imprint data memory pointer to 1.
Decrement and return to step 19.

When the operations from step 19 to step 24 have been counted for the number of images to be taken, a rewinding end signal is detected in step 20, and the process proceeds to step 25.

[Step 25] Set the imprint data storage pointer to the initial position.

This completes the series of operations, but a detailed explanation of the operations from step 17 to step 24 on the camera side and within the data imprinting device 2 will now be given with reference to Fig. 3.4. .

The film tension mentioned above is the signal board 27 in FIG. 4(a).
It is uncertain where on the top it occurs. In other words, in the embodiment of the present invention, the imprint data is stored in an externally added RAMI OS at the time of photographing, and the information (or the information is corrected before the film is rewound). Information) is read while the film is being wound, and the LED array 14 for imprinting is flashed to imprint the image, so the imprint data and the actual photographed frame correspond 1:1 even when the film is rewound. Otherwise, the information will be different from the one at the time of shooting (for example, information shifted by one frame)
Therefore, when rewinding the film after stretching, it is necessary to reliably detect that the portion of the film 12 corresponding to the last photographed frame passes through the LED array 14. (cue) and print the imprint data of the last photographed frame on the LED.
It is impossible to imprint by blinking the array 14.

As mentioned above, film tension positions can occur in all areas A-C on the signal board 27. Therefore, in this embodiment, the outputs P 1 r P 2 are simultaneously output after the rewinding of the last photographic frame is started (the signal contact piece 26 begins to rotate in the direction of arrow B in FIG. 4(a)). This can be achieved by configuring a configuration that detects when it is turned on (passing through area C in Figures 4 (a) and (c)) and then starts imprinting on the final shooting frame. I have to.

Even after the ON signals of the outputs P, , P2 are output simultaneously, the signal board 27 continues to output the output P1 at each rewinding angle α. It is configured so that one digit of imprint data is imprinted within one pulse of P1.

Here, for each pulse of output P1 that is continuously output, "1
” to “43” (see Figure 4 (C))
and the desired imprinting head pressure #L2 (see Fig. 4(b))
In order to obtain this, the LED array 14 is controlled so that it does not blink during the 1st to 9th pulses (in other words, the 1st to 9th pulses are discarded pulses), and up to 30 digits are imprinted within the subsequent distance L3. Therefore, the LED array 14 is blinked according to the 10th to 39th pulses to form 30 characters on the surface of the final photographed frame, and the LED array 14 is blinked again in the following 40th to 43rd pulses.
4 is controlled so that it does not blink.

When the unwinding angle α further advances, the output PI.

The data of the simultaneous ON signal of P2 again is sent from the camera side, and the data is imprinted on the next photographic frame based on the output PI data that is subsequently output in the same way.
Thereafter, the data imprinting device 2 performs similar operations based on data from the camera side until imprinting on the first photographed frame is completed.

Next, how to set the blinking timing of the LED array 14 will be explained.

During rewinding, the speed of the film 12 fluctuates, and as a result, there is a risk that the width of the imprinted characters displayed in a dot matrix and the pitch between dots may become uneven.To prevent this, needs to absorb this variation. Figure 4(d),(e).

This point will be explained using (f).

FIG. 4(d) is an enlarged display of the 9th to 11th pulses in FIG. 4(C) with the horizontal axis as the time axis.

Each period is T9. Let TIO, Tll. The LED array 14 has seven LEDs arranged vertically, and has a size of 5×7.
In order to form a character with the dot matrix of the output P1
It is necessary to turn on the light five times during one pulse. Also, since an appropriate margin is required between adjacent characters, 1 of output P1
The pulse is divided into seven parts, characters are formed in 5/7 of the l pulse, and blank space is formed in the remaining 2/7. Further, FIG. 4(e) shows the lighting pulse of the LED array 14,
FIG. 4(f) shows a 5×7 dot matrix character obtained by this method.

The LED array 14 is controlled to start blinking from the 10th pulse of the output P1, and the blinking period is determined by the 9th pulse. In other words, T
The blinking period is set to 9/7, and the lighting time of the LED array 14 once is set to T9/14 or less. This is a necessary condition for keeping the amount of film movement during lighting to be less than 1/2 of the distance between adjacent dots, obtaining resolution between dots, and maintaining the quality of imprinted characters. Similarly, the blinking period of the LED array 14 at the 11th pulse of the output P1 is TlO/7. 1st
For 2 pulses, Tll/7 is used.

In this way, the output P1 for one character (one pitch) (which is sufficiently small compared to the film advance amount for one frame)
The distance between the imprinted characters and dots, that is, the LED
1 because it is configured to determine the flashing cycle of the array 14.
Even if there is a change in film speed during rewinding, it can be adequately coped with, and irregularities in character width and distance between dots can be eliminated.

On the other hand, at the start of rewinding, the speed of the film 12 fluctuates greatly as explained using FIG. 7, so even if the speed control is performed as described above, this fluctuation cannot be completely absorbed. In other words, it is difficult to suppress the width of the characters and the pitch between dots imprinted on the final photographic frame to such a level that they are not judged to be uneven (signal board 2
This is possible if the pitch of the pattern 27a on the pattern 27a on the pattern 7 is made smaller, but there is a limit to this).However, in this embodiment, as shown in FIG. System 15 with aperture 22 and cartridge 18
Since it is arranged as close to the cartridge 18 side as possible between the two, the start of data imprinting can be delayed for a certain period of time from the start of film rewinding, and the film feeding speed immediately after the start of film rewinding can be adjusted. There is no need to detect the speed in areas where the speed fluctuates greatly; it is sufficient to detect the speed in areas where the speed is relatively stable and start imprinting data based on that, so even in the final shooting frame, the character width , it is possible to eliminate uneven distances between dots.

Furthermore, since the LED array 14 and the imprinting optical system 15 are fixed to the pressure plate 13, even if the film 12 moves, the relative positions of the film 12 and the LED array 14 and the imprinting optical system 15 do not change ( (because they move in the same way), the size of the imprinted dots is also constant, making it possible to imprint characters that are easy to see.

(Correspondence between the invention and the embodiments) In this embodiment, the LED array 14 and the light emission drive circuit 104 correspond to the data imprinting means of the present invention, and the microcomputer 100 corresponds to the control means.

(Effects of the Invention) As explained above, according to the present invention, the data imprinting means is fixed to the cartridge side end of the pressure plate, and the timing of data imprinting by the data imprinting means is determined when the film is rewound. Since the data imprinting means is arranged so as to be delayed as much as possible from the start and to be linked to fluctuations in the photographing optical axis direction of the film, it is possible to copy data that is easy to see and the intervals of each imprinted data are uniform. In addition, data can be imprinted without being affected by fluctuations in the photographing optical axis direction of the film.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a camera equipped with a device according to an embodiment of the present invention, FIG. 2 is a diagram showing the mechanical configuration of the main parts thereof, and FIG. 3 is a diagram showing an embodiment of the present invention. A block diagram, FIG. 4 is a diagram for explaining the data imprinting process, FIG. 5 is a diagram for explaining the inside of the externally added RAM shown in FIG. 3, and FIG. 6 is a flowchart showing an embodiment of the present invention. , FIG. 7 is a diagram illustrating the state of film feeding speed at the start of general film rewinding. 1...Camera body, 2...Data imprinting device, 3...LCD, 4-11...
・Key, 12... Film, 14...
LED array, 20... Rewind remoter, 26.
...Signal contact piece, 27...Signal board, 10
0...Microcomputer, 102...
...Operation member, 105...External expansion RAM, 1
06... Camera control circuit, 107, 108.
...Switching transistor, P,, P2...
...Output, T...Period, L1-L3...
···distance. Patent applicant Minoru Nakamura, representative of Canon Co., Ltd. Figure 4

Claims (1)

[Claims] (1) A data imprinting means that imprints data onto the film surface; a pressure plate that brings the film screen into close contact with the camera aperture; and when rewinding the film, the data imprinting means imprints the data onto each photographed frame. What is claimed is: 1. A data imprinting apparatus comprising: a control means for controlling the data imprinting apparatus, wherein the data imprinting means is fixed to an end of the pressure plate on the cartridge side.