JPS60247632A - Device for checking imprinting of data - Google Patents

Abstract

PURPOSE:To require less circuits to be increased for checking data imprinting by making common use of a display device for checking data imprinting and the other display device, for example, a display device for displaying the information on exposure. CONSTITUTION:A switch 19 turns on and the input to a monostable multivibrator 5 falls to an L level when a film exposing operation is carried out. Then the output therefrom maintains an H level for the specified time necessary for data imprinting. A transistor 3 turns on and a lamp 2 for data imprinting emits light. The data are imprinted onto the film plane in the specified time. An LED27 for checking imprinting lights up when the output of a NOR gate 26 inverts to the H level. The output from the vibrator 5 inverts thereafter from the H level to the L level, then the lamp 2 is put out. The output from the gate 26 inverts from the H level to the L level when the data imprinting is completed. The LED27 changes then from lighting to putting out. The photographer is able to check the completion of the data imprinting without leaving the eye from the finder.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a data imprinting confirmation device when using a data imprinting device capable of imprinting arbitrary data on the same screen as a subject image.

Conventionally, in a data imprinting device that imprints data on the film surface, there is a method of lighting up the LED or TJCD of the data imprinting device when data imprinting is performed in order to let the photographer confirm that the imprinting has been performed. A known friend.

However, with this method, the LBD or LCD of the data imprinting device only lights up, so it is difficult to confirm that data has been imprinted when the photographer is looking into the viewfinder, such as during continuous shooting. was there.

On the other hand, it is conceivable to use a display means on the camera side, such as an LED in the viewfinder or a sounding body, to confirm the imprint. However, according to the above method, there is an imprinting start signal bin between the data imprinting device and the camera that transmits an imprinting start signal from the camera to the data imprinting device, and an imprinting confirmation signal from the data imprinting device to the camera. There must be 6 bins, including an imprint confirmation signal bin to transmit, and a signal ground bin that has the same ground potential as that of the data imprinting device and the camera. However, like a camera, it is difficult for the user to operate In devices where a shed is an essential requirement, it is often not possible to maintain wide contact spacing, and the conventional method described above may cause poor insulation between the contacts due to dew condensation, etc., or Poor conductivity often occurs between contacts that are to be connected due to dirt or the like. Therefore, the challenge is to reduce the number of contacts in order to prevent malfunctions caused by poor insulation or poor continuity.

In view of the above points, an object of the invention is to provide a data imprinting confirmation device that allows data imprinting of a data imprinting device to be confirmed on the camera side without increasing the number of contact points between the data imprinting device and the camera. That is.

The non-invention will be explained in detail below using the drawings.

FIG. 1 is a circuit diagram of an embodiment of the invention.

In FIG. 1, A indicates a data back device, and B indicates a camera control section. Reference numeral 1 denotes a power battery for the data back device A, and 2 a lamp for data imprinting.Although a light bulb is used in the non-embodiment, an LED or the like may also be used. 3 is a transistor that controls the current flowing through the lamp 2; 4 is the base resistance of transistor 3; 5 is a transistor whose output is at an L level when the input is at an H level; when the input is at an L level, the output is also at an H level for a certain period of time required for data imprinting A monostable multivibrator (hereinafter referred to as a monostable multi) that becomes the level, 7 is a transistor that is turned on and off by the output of the monostable multi 5, and 8 is connected to the collector of the transistor 7's base resistor Wpo &'+). 10 is a diode that prevents the current from the camera control unit B from flowing into the data bank device AK;
1 is a transistor that controls the current flowing from the camera control unit B to the data back device A; 12 is a transistor 11;
base resistor, 16 is a signal terminal for transmitting signals between camera control unit B and data back device A, 14 camera control unit B
Ground terminal to connect the ground line of data back group [A], 15#'i, power supply battery for camera control unit B, 16 motor drive, winding motor of winder, etc., 17Fi to drive current for motor 16. In the control circuit of the 18Fi power camera control unit B, the transistor to be controlled is an output terminal that is controlled so that IR-1 is at L level after film winding and during film exposure, and becomes I/'i and H level after film exposure is completed. , 18-2 is an input terminal for detecting whether or not the film is being exposed; 19 is an input terminal for detecting whether the shutter button is being exposed;
A normally open switch that is turned on during film exposure time, 20 is an AND gate that connects input terminal 18-1 and diode 22.
It is connected to the signal terminal 13 via. 21 is a resistor that prevents a short-circuit current from flowing when the transistor 11 is on; 22 is a diode that prevents current from flowing into the camera control unit B from the data back device A; and 23 is a resistor that prevents the current from flowing from the data back device A to the camera control unit B. 24 is the base resistance of transistor 2'5, which controls the current flowing into the transistor.

26 is a NOR gate with one input connected to b2 shown in FIG. 1, and the other input connected to OK. 27
#'i LID for imprint display. Reference numeral 28 denotes a monostable multivibrator (hereinafter referred to as a monostable multivibrator), which is configured such that when the input crab N goes to the H level, the output terminal C outputs an H level signal for a certain period of time shorter than the data imprinting time. Reference numeral 34 denotes an imprinting prohibition switch, and by turning on this switch, the output of the monostable multi 5 is fixed at L level regardless of whether it is at R level or L level. The output level of the monostable multi 5 is determined so that the transistor 7 is turned off while the transistor 12 is turned on by the H level output signal of the monostable multi 5.

Next, the operation buttons of the embodiment configured as described above will be explained.

In the initial state when the second stroke of the shutter button is pressed, the switch 19 is off and the control circuit 18
At the output terminal 18-1ijL level, the output of the monostable multi 5 is at the L level, transistor 7 is on, and transistor 12Vi is off. Also, the output of monostable multi 2B is L.
Since the level is high, the transistor 23 is turned off.

Therefore, signal bin 13 is at H level. At which point the second stroke of the shutter button is pressed and switch 19 is turned on, at the same time the film exposure operation is performed. Switch 19 is turned on and monostable multi 28
The ninth transistor 23, which outputs an H level signal for a certain period of time on monostable multi 2nd day, is turned on.
, the diode 22, and the transistor 23, and the current flows from the power supply battery 1 of the data pack device B to the transistor 7, the resistor 9, the diode 10, the terminal 13, the transistor 23,
Current flows through terminal 14. As a result, the signal bin 13 is set to L.
level, and the input of monostable multi-5 is L level Kit
), the output of the monostable multi 5 becomes H level for a certain period of time required for data imprinting, the base potential of the transistor 70 is set to H level, and the resistor 9 turns off.
No current flows through.

The H level output of the Mayu monostable multi 5 turns on the transistor 12, turns on the transistor 3, and causes the data imprinting lamp 2 to emit light.

Data is imprinted on the film for a certain period of time when the output terminal 5-1 of the single-redundant multiplexer 5 is at the H level. When the output terminal 5-1 of the monostable multi 5 is inverted from H level to L level, transistor 7 is turned on, and transistor 3.11 is turned on.
is off. If imprinting is completed before film exposure is completed, the current after data imprinting is completed and before film exposure is completed is from power supply battery 1 to transistor 7, resistor 9, diode 10 to terminal 13, and from transistor 23 to terminal 1.
4, from the power supply battery 15 to the resistor 21 and diode 22
, flows to transistor 23. Since the output terminal 18-1 of the control circuit 18 is at the L level, the output of the AND gate 20 is LL/Bell, and the transistor 17 is off, so that no current flows through the motor 16 that winds the film, and the motor 16 is not driven. . After the film exposure is completed, the switch 19 is turned off, the output terminal 18-1 of the control circuit 18 is at H level, the transistor 23 is turned off, and no current flows through the above path. , so terminal 1
3 is high, the inputs of the AND gate 20 are both at H level, and the output is inverted from L level to ■ level, transistor 17 is turned on, and winding motor 16 is driven to wind one frame of film. Since the output terminal 18-1 of the control circuit 1 goes to L level, the output of the AND gate goes to L level and the winding motor 16 stops.

On the other hand, since the time for the monostable multi 28 to output an H level signal is shorter than the time for the monostable multi 5 to output an H level signal, the output of the monostable multi 2B, that is, the first
When C shown in the figure is inverted from the H level to the L level, the transistor 11 is turned on by the output of the monostable multiplier 5.]3 The potential at the terminal remains at the L level.

Therefore, when the output of the NOR gate 26 is inverted to H level, the imprint confirmation LBD 27 lights up. After that, the output of monostable multi-5 becomes H level or 1. The level is inverted, the lamp 2 goes out, data imprinting is completed, the transistor 12 is turned off, the potential of the terminal 13 becomes H level, and the output of the agate 26 is inverted from H level to L level. The imprint confirmation LJCD 27 switches from lighting to extinguishing, allowing the photographer to confirm that data imprinting has been completed without taking his eyes off the viewfinder. If the film exposure is completed before the data imprinting, the current after the film exposure is completed but before the imprinting is completed flows from the power supply battery 15 through the resistor 21, the diode 22, and the terminal 13, and from the transistor 11 to the terminal 14. Therefore, the control circuit 1 which is one input terminal of the AND gate 20
Even if the output terminal 18-1 of the 8 is at the H level, the other input terminal is at the L level, so the output of the AND gate 20 is at the L level, the transistor 17 is turned off, and the winding motor 16 is not driven. After that, the output 5-1 of the monostable multi 5 is inverted from H level to L level, transistors 3 and 11 are turned off, transistor 7 is turned on, the data imprinting lamp is turned off, data imprinting is completed, and the transistor 11 turns from on to off, the current path is cut off, both inputs of the AND gate 20 go to H level, the transistor 17 turns on, and the winding motor 16
is driven and winds the film one frame, control circuit 1
8 is inverted to L level, the output of AND gate 20 is set to L level, and winding motor 16 is stopped.

In this case as well, until the data imprinting is completed, the transistor 11 is on, and the human power on one side of the NOR gate 26 is at the L level, so the output of the monostable multi 28 is at the H level, or after the L level is inverted, the data is transferred. Until the imprinting is completed, the transistor 12 is turned off, and the potential of the terminal 13 rises, a signal of 26 dH level is output, the imprint confirmation IJD 27 lights up, and the photographer must take his eyes off the viewfinder. You can check the data imprinting on the camera side without any hassle.

- If the data bank device A is not used for imprinting, that is, if the data bank device A is attached to the camera, or if the switch 34 is on even if the data bank device A is attached to the camera, the release switch 19 is turned on; While the H-level signal is output from the single-wire multi-wire 28 and the transistor 23 is on, the potential of b is at the L-level.
When the output of the Single Anken Multi 28 is inverted from H level to L level, the transistor 23 is turned off, and the potential of b becomes H level and the output FiL level of the dino gate 26 is j5 L.
EI) 27 does not light up.

Therefore, when data is imprinted,
The LED 27 does not turn on, and when it is turned off, it is possible to confirm that the data has been imprinted.

In the embodiment shown in Fig. 1, an LED for imprint confirmation is used.
However, an embodiment in which the IJD for imprint confirmation is not provided and is used also as another display element will be described with reference to FIGS. 2 and 3. Figure 2 (al~(dlFiLIcD or l-j
Fig. 2(a) is a front view of a 7-segment, 6-digit display device composed of an LCD (a horizontal line indicates between the third digit from the left and the right), and Fig. 2(a) shows the display cell of the display member. Figure 2 (b) shows the state in which the exposure information is displayed. Figure 2 (1)) shows the aperture value F5.6 and the shutter speed bead π blind second. ing.

Figure 2 (C) and Figure 2 (d) are diagrams showing that the date is being imprinted, and in the example shown in Figure 2 (0),
Figure 2 (d) K
In the example shown, "6..." is displayed to indicate that k to p data is being imprinted.
In the block diagram of the drive circuit of the display device shown in the figure, the circuit that generates the input signal c of the NOR gate 26 is exactly the same as that in FIG. 1, and the explanation thereof will be omitted. In FIG. 3, 28' is an exposure control circuit of the camera which outputs exposure information to a decoder 29'. When the output of the NOR gate 26 is at L level, the decoder 29' decodes the exposure information outputted from the exposure control circuit 28' and displays the display member 30' as shown in FIG. When is at H level, the display member 3 as shown in FIG. 2(C) or FIG.
A signal for displaying 0' is output to the display member 30'. ,
50' is a display member, as described above (LED or LC).
It is a 7-segment, 6-digit display member consisting of A segment for indicating ``T'' in FIG. 2 1al is provided between.

Next, the operation of the ninth embodiment shown in FIG. 3 constructed as above will be explained.

When data imprinting is not performed, the output of the NOR gate 26 remains at the L level as described above, and the decoder 29' decodes the signal output from the exposure control circuit 28' and displays the display member 30'. drive When the release is performed and the imprinting operation is performed, the output of the Noah gate 26 is at the H level for a certain period of time, as described above, so the display member 5
0' performs a display different from the exposure information shown in FIG. 2 (Q) or (a).

In addition, in the embodiment shown in FIG. 1, the data imprinting confirmation display was performed only during the difference in time between outputting H level signals of the monostable multi 28 and the monostable multi 5, but as shown in FIG. Of course, the method shown in FIG. 4 can also be applied to the embodiment shown in FIG.

Also, in place of the monostable multi 31 shown in Fig. 4, a fifth
It is set by the output of the NOR gate 26 shown in the figure.
A flip-flop 32 which is reset by a signal indicated by K and an AND gate which outputs an AND between the output of the flip-flop 52 and the signal indicated by a in FIG. 1 are provided, and Ll! during film winding is provided. Display may be performed by driving D27.

In the above embodiments, all the displays used LEDs or LCDs, but it goes without saying that other display elements such as FiOD may also be used, and even if the display is based on the sound of a sounding body. good. Furthermore, although the embodiment does not show means for controlling the content imprinted by the data imprinting lamp 2, for example, a reference clock generator and a counter used to display the time etc. can be used as a monostable as shown in FIG. It can also be used as a multi-function device (instead of the multi 5), and a rational design can be achieved by replacing the single-unit multi 28 on the camera side with a reference clock generator and a counter for the camera.

Depending on the non-embodiment, the circuits and parts that will be added to confirm data imprinting will depend on the display device for confirming data imprinting and other display devices, such as the display device for displaying exposure information. Compared to the case where a completely independent display means is provided for imprint confirmation, the cost is much less and it is advantageous in terms of cost and implementation. Although it may be difficult to see in close proximity to other display devices, it is possible to display the imprint confirmation on a device that displays other information, such as an exposure information display device, making it easier to see what is inside the window. It goes without saying that it will become.

As described above, according to the invention, the data imprinting device that can imprint data onto the film surface and the camera are comprised, and the data imprinting start signal and the data imprinting confirmation signal are transmitted between the camera and the data imprinting device. In a data imprinting confirmation device for a camera system, the data imprinting start signal and the data imprinting confirmation signal are transmitted through a single signal line (transmission means (transistor 7.11.23 in FIG. 1 of the embodiment)). Monostable multi 5゜28 diode 1
0, 22), and a data imprint confirmation display means provided on the camera side (corresponding to LED 27 in the embodiments Figs. 1, 4, and 5, and 50' in Fig. 3). Since a control means (corresponding to the Noah gate 26 of the embodiment) is provided for causing the data imprinting confirmation display means to display data imprinting confirmation (by detecting the level of the single signal line), the camera and Data imprinting signals can be transmitted to the camera side without increasing the number of contacts with the data imprinting device, and data imprinting can be confirmed with the camera without increasing the number of contacts and increasing the possibility of malfunctions due to leaks between contacts. It has the effect of being able to be performed on the side, and is extremely useful in practice.

[Brief explanation of drawings]

Figure 1 is a circuit diagram of an embodiment of the invention, Figures 2 (a) to (
+1) is a front view of a 7-segment, 6-digit display device composed of LEDs or LCDs, tJcs is a block diagram of the drive circuit of the display device shown in FIG. 2, and FIGS. 4 and 5 are LID 27 FIG. 3 is a block diagram of another embodiment of the drive circuit of FIG. 5.28... Monostable multi-bi break 71125・
...Transistor 10.22...Diode 26...Noah gate 27...LED 30...Display member applicant Canon Co., Ltd. Figure 2 t and l - ~ ~ ~ ~ ~ ~ ~ ~ Figure 3 Figure 4 I Figure 5

Claims (2)

[Claims] (1) A data imprinting device capable of imprinting data onto the film surface and a camera are connected. A data imprinting start signal from the camera to the data imprinting device and a data imprinting confirmation signal from the data imprinting device to the camera. In the data imprinting confirmation device of the camera system that transmits the data between the camera and the data imprinting device, the data imprinting start signal and the data imprinting confirmation signal are transmitted by changing the level of a single signal line. data imprint confirmation display means provided on the transmitting means and the camera; and a control means for causing the data imprint confirmation display means to perform a data imprint confirmation display when the level of the single signal line is detected. A data imprinting confirmation device comprising: (2) A data imprinting confirmation device according to claim 1, wherein the data imprinting confirmation display means also serves as another display device of the camera.