JPS584125A - Data imprinting device of camera - Google Patents

Abstract

PURPOSE:To accomplish continuous photographing at an extremely high speed and reduce data recording to the minimum of a demand by inprinting data only the initial frame of a film. CONSTITUTION:When a switch SW5 is turned to the contact 4b side and a release switch SW1 is turned on, a low level signal is inputted to a camera controlling part 9 and shutter release is executed. At the input of the signal to a lighting command circuit 16, a lighting command signal with the pulse width equal to an imprinting time t2 is generated by the leading edge 30a of the input signal, a transistor Tr1 is turned on and a light source 23 lights up, so that data are imprinted in a film. Since the lighting command signal is generated by the leading edge of the low level signal, data are imprinted only in the initial frame of the film if a release button 8 is continued to be depressed at the time of continuous photographing. AT the normal continuous photographing, the switch SW5 is turned to the contact 5b side.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a data imprinting device suitable for a camera that performs continuous shooting by electric winding or spring winding of film.

A data imprinting device imprints information such as the date, time, aperture value, and shutter speed on the film.
When a data imprinting device such as a back cover type is attached to the camera, the lamp, light emitting diode, etc. The light source for imprinting is turned on. The lighting time of the light source for imprinting is set in advance in the control circuit in order to give the film proper exposure, taking into consideration the film sensitivity, etc.This lighting time is also determined by the time required from the start to the completion of the shutter release. Normally, it takes considerably longer than the previous year. On the other hand, using electric drive devices etc.
- When performing continuous shooting, a shutter release completion signal output from the camera starts the motor in the electric drive device and drives the film winding system. Therefore, when a camera is equipped with both a data imprinting device and an electric drive device and data is imprinted at the same time as continuous shooting, the film winding starts before the imprinting light source is turned on. There is a danger that it will get lost. In other words, since the film runs before the data imprinting is completed, the imprinted data will cause screen drift.5 In particular, when shooting with low-sensitivity film, it is necessary to turn on the imprinting light source for a longer time. Therefore, this risk is further increased, and continuous photographing using an electric drive device is virtually impossible.

In order to eliminate this drawback, the camera sends a winding signal to the electric drive device upon completion of the shutter release, and at the same time sends an imprint signal to the data imprinting device, and when the data imprinting device is in the process of imprinting, a winding prohibition signal is sent Conventionally, it has been proposed that the electric drive device starts winding when it receives a winding signal from the camera and no longer receives a winding prohibition signal from the data imprinting device.

However, in this case, the sequence is such that the film is wound only after the lighting of the imprinting light source is completed, making continuous shooting at extremely high speeds impossible when the data imprinting device is operating. This will cause inconvenience.

An object of the present invention is to solve the above-mentioned problems and to imprint data only on the first frame of the film.
To provide a data imprinting device for a camera that enables continuous photographing at extremely high speed and records data at the minimum necessary level.

In order to achieve this object, the present invention provides a release button/
Receives the release button on signal generated by pressing the button.
Leading edge of release button on signal
The present invention is characterized in that a lighting command circuit is provided which turns on the imprinting light source for a predetermined period of time after the leading edge and outputs a lighting signal necessary for controlling the film winding drive device.

Hereinafter, the present invention will be explained in detail based on illustrated embodiments.

FIG. 1 shows a data imprinting device 1 which is an embodiment of the present invention.
A circuit diagram when the camera 3 is attached to the camera 3 together with the electric drive device 2 is shown. Camera mKl & cut terminal due to installation 4.
5.6 are terminals 4m, 5m, 6a of data imprinting device 1
i (mm), and the terminal 7 is automatically connected to the terminal 71 of the electric drive device 2. The camera 3 is provided with a release button 8, and pressing the release button 8 turns on the release switch 8W1. The camera control unit starts the shutter release by turning on the release switch swto, and keeps the winding switch 8W2 in the on state shown by the dotted line from the completion of the shutter release until the completion of raising the film.10 is the camera control unit 90 When the data imprinting device 1 is not connected to the camera 5Kli1, or when the main switch 8W4 of the data imprinting device I is turned off, the terminals S and 6 are connected to the power supply by the short-circuit switch 8W3. The structure of the main switch 8W4 that is short-circuited is shown in Figure 2.

The main switch 8W4 is the switch member 1, and the main switch 8W4 is the switch member 1.
1, and the operating section 'i1m of the switch member 11 is centrally exposed to the outside of the data imprinting device 1. When the operating section 111 is moved to the left, the pushing section 11b is moved to the main switch 8W4.
Push the contact 12 of the main switch 8W4 to the left.
Turn on. As the switch member 11 moves to the left, the inclined portion 11C pushes up the driven member 13, turning off the short-circuit switch 8W3. The driven member 13 is constantly pushed down by a spring (not shown) and comes into contact with the inclined portion 116 . If the switch member 11 is moved to the right, the main switch 8W4 is turned off, and the lower driven member 130 11
As a result, the short circuit switch SW3 is turned on. Further, when the data imprinting device 1 is not attached to the camera 3, the driven member 13 is removed from the shorting switch 8W3, so the shorting switch 8W3 is turned off.

Returning to the explanation of FIG. 1, the data imprinting device 1 is provided with a changeover switch 8Ws. The changeover switch 8Ws is
During high-speed continuous shooting, the contact 4b side is turned on, and during normal continuous shooting, the contact 5b side is turned on. The changeover switch SWs is connected to the power supply 1115 via the resistor 14 and the main switch 8W4: I! The zero lighting command circuit 16, which is connected to the lighting command circuit 16, includes a Nantes gate 17, a capacitor 18, a variable resistor 19, and an inverter 2.
Consists of 0. The output of the lighting command circuit 16 is a transistor T.
It is applied to the base of ri and the winding command circuit 21. Transistor! r1 is the Noah gate of the 0-winding finger metal circuit 21 that controls the imprinting fist circuit 22 and the imprinting light source zs!
4 receives an input from the output terminal SO which inverts the output of the lighting command circuit 16 and an input via the terminal 5, and the output from the NOR gate 24 is applied to the base of the transistor voice Tr2 via a resistor 26. 27 is the 0 winding command circuit 2 which is a g expansion.
The 10FB force is sent to the electric H-motor 10 control circuit 2B1C via terminals Sa, S and terminals 7 and 7. M is a printer, 8W6 is a power switch, and 29 is a power supply.

The operation in the case of normal continuous shooting will be explained with reference to the O time chart in FIG. In this case, the changeover switch 8W5 is turned on at the contact 5b@I/C. Since the main switch 8W4 is of course turned on, the short circuit switch sw3
is off. A to F in FIG. 3 indicate each point in FIG. 1. O When the release button 8 is pressed, the release switch 8W 1
When the button is turned on (falls to ground level), a low-level release button on signal 3o is input to the camera control unit 9,
The shutter release (second time "t") is performed. When the shutter release is completed, the winding switch sw2 is turned on, and the winding signal 31 of -1 level is transmitted to the point A via the terminal 5.5 and the changeover switch SWs.

From the leading edge 31a (leading edge)k of the winding signal 31, the output of the Nant gate 17 (potential at point B) changes from low level to high level, and this level change is determined by a differentiating circuit consisting of a capacitor 18 and a variable resistor 19. The lighting command signal 321C is differentiated from the inverter 2 (l).
converted. Lighting command signal 3 (a)/distator (r1)
is turned on, the imprinting circuit 22 is operated, and the imprinting light source z3 is turned on. Imprint time t! In consideration of the film sensitivity and the like, the lighting command signal 32 of the variable resistor 19 is sent to the NOR gate 24 through 2 seconds as a lighting signal. The other input terminal of NOR gate = 4 has a winding switch 8W2iP#)! '-Level winding signal 3
1 is input, so when there is a lighting signal, the output of the NOR gate 240 is kept at the 4-level, the transistor Trl is turned off, and the electrically driven scissors holder M is stopped. When the lighting A signal disappears, that is, when the potential at one point reaches the 4-level, the output of the NOR gate 240 becomes high level, the transistor Trg turns on, and a low level winding command signal 33 is sent to the electric drive device 2.
When the film roller M rotates and winding of the film is completed in 50 rows and a winding time t, the film winding switch 8Wz is turned on.
is turned off, and since the release button /8 continues to be pressed at this time, the next shutter release is performed. When the winding switch 8W2 is turned off, the output of the Nantes gate 17 changes to low level, and the output of the Noah gate z4 becomes low level, and the winding command signal 33 ends. When the next shutter release is completed, the same operation as described above is repeated again.

In this way, the time Te required for one cycle from the start of the shutter release to the completion of winding is (t, ++ ts +
ts). Since winding is always performed after data imprinting is completed, there is no risk that the imprinted data will appear on the screen. The data is then imprinted onto each frame of the film.

The operation in the case of high-speed continuous shooting will be explained with reference to the time chart shown in FIG. In this case, the changeover switch 8W5 is turned on at the contact 4b@pc. When release button 8 is pressed and release switch sw 1 is turned on,
A low-level release button-on signal 30 is input to the camera control 1i9, and a shirt turn 9-s (second fs) is performed. When the button-on signal 30 is manually applied to the lighting command circuit 16, a lighting command signal 32 having a strong pulse width is generated at the imprint time t* from its leading edge soa#c, as in the case described above, and the transistor Tri is turned on, and as a result, the imprint moonlight *ZS lights up and the data is imprinted onto the film. Imprinting starts at the same time as the kuyatsuta release. Since the lighting command signal 32 is generated from the release control voice y-on signal SoO leading edge 30aK,
When the release button 8 is kept pressed during continuous shooting, the lighting command signal 32 is generated only at the first o1 frame of the film, and is not generated thereafter, so that data is imprinted only on the first frame.

When the lighting command signal 32 is input as a lighting signal to the Noah gamer 24 via the inverter zs, the winding switch 8
Regardless of the input voltage from W2, the output of the NOR gate 24 is low level, and the transistor Tr2 is off.
Electric drive device 2 does not operate. After the shutter release is completed and the winding switch 8W2 is turned off, a low-level winding signal 31 is input to the Noah gate 24. When data imprinting is completed and the lighting signal disappears, the output of the Noah gate 24 becomes high level. Then, the transistor Tr2 is turned on and sends a low-level winding command signal 33 to the electric drive device 2, and winding is started.

The winding time is t.

In this case, the time required for one cycle from the start of the shutter release to the completion of winding is 1. The time required for one cycle from the start of the shutter release to the completion of winding is 1. Thereafter, it is the sum of the shutter time t and the winding time t.

Usually the shutter speed is 1. <Imprint time t, so what is the time required from the second frame of the film? , is much shorter than that of the first frame. Furthermore, when compared with the time required when the changeover switch 8W5 is turned on at the contact sb@Ic, the time required T1 becomes very small compared to the time required Te=("g + tt + tm), making it possible to increase the speed of continuous photographing. Since winding of the first frame is prohibited until the data imprinting is completed, the data imprinting is performed reliably and there is no risk of screen blurring.

When the data imprinting device 1 is not attached to the camera 23 and only the electric drive device 20 is attached to the camera 3Kii, the winding signal 31 from the winding switch 8W2 is as follows: terminal 5 → short circuit switch SW3 → terminal 6 → Middle terminal 7 → terminal 78t
- directly to the electric drive 2, which performs a normal winding operation.

The lighting command circuit 16 is not limited to one using a differential circuit as shown in FIG. Figure 5 shows the lighting command circuit 160.
Here's another example. This lighting command path 16 corresponds to the 1 oscillation circuit 34.
, an asynchronous 112++a path first kakunta 3S, second counter 36, and Noah gate sy, ss.
Tsubu 39, Noah Gate 40. 41, an inverter 4, and an imprint time setting switch SW7.

The operation will be explained with reference to the time chart of FIG. When the release switch 8W1 is turned on, the low level release button on signal 30 is passed through the clear terminal CLI of the first counter 35 and the AND gate 41 to the second counter 3.
6 clear terminal CL2, the first counter 3s
The second counter 36 counts clock pulses input from the oscillation circuit 34 to the clock terminals CLKI and CLK2. The output terminals Q and t of the first counter 35 are Noah game) 4
00 is connected to one of the input terminals, so when the output of the output terminal Q1m becomes high level, the NOA game) 4G is closed, and the first counter 35 starts counting by outputting only one pulse from the output terminal Qos. stop. Output terminal Q
When the output of OI becomes high level, the slip 70 switch 39 is set, the p-level lighting command signal 32 is output from its reset output terminal Q, the transistor Tri is turned on, and the imprinting light source 23 is turned on. Light.

The second capacitor 36 counts the p-clock pulses, and when the output at its output terminal Q becomes high level, the flip-flop tab 39 is reset and the lighting command signal 32 is terminated. The lighting command signal 32 is sent as a lighting signal to the winding command circuit 21 shown in FIG. 1, and prohibits the operation of the electric drive device 2.

The pulse width of the lighting command signal 32, that is, the imprinting time t, is selected by the imprinting time setting switch 8W7. In FIG. 5, since the output terminal Q is selected, the imprinting time t8 is equal to four pulses, but if any of the output terminals Q - Qn is selected, the imprinting time t8
are each equivalent to S-(!”-1) turkey pulses.

The lighting command signal 3t is generated from the release button on signal 300 and 5OaK.
Since 2m is determined according to the phase of the first Turk pulse inputted to the first star 35, there is a slight phase delay from the leading edge 30m.

Release button 8 is released and release switch S
When W1 turns on, the first counter 35 and the second counter/
Clear terminal CL l of 36.

Since a high level signal is input to Cl3, all outputs No. 1 of the output terminals Q...Q...Q...Qmt become low level and return to the initial state.

The above explanation is for when the changeover switch SW5 is turned on to the contact 4b side, but when the changeover switch SW5 is turned on to the contact 5b side, the winding switch 8W20 is turned on and the low level winding signal 31 is sent to the first counter 35 and Input to the clear terminals CLI and CLz of the second cow/rear 36,
The operation thereafter is exactly the same.

According to the embodiments shown in FIGS. 1 and 5, it is possible to switch between high-speed continuous shooting and normal continuous shooting simply by switching the changeover switch 8W5, so the operation is simple. Also,
It can be used in a wide variety of fields, from sports photography that requires high-speed continuous shooting to academic photography that requires accurate data imprinting at regular intervals.

In the OX embodiments shown in FIGS. 1 and 5, the lighting command signal 3t is used as the lighting signal. You may. Furthermore, inverter 25. in FIG. The circuit of the NOR gate 24, the resistors 26 and 27, and the transistor 〒r2 is the data imprinting device 1.
Instead of being provided within the electric drive device 2, it may be provided within the electric drive device 2.

In the 111th Km%, an electric drive device is used as the film winding drive device, but a drive device using a spring may also be used.

As explained above, according to one aspect of the present invention, upon receiving the release button on signal generated by pressing the release button O,
51C, the light source for imprinting is turned on for a predetermined period of time after the front edge of the shutter by the leading edge of the release button on signal.
If you keep pressing the release button for continuous shooting, data will be imprinted only on the first 01th frame of the film.
Since there is no data imprinting from the frames, it is possible to perform continuous photographing at extremely high speed, and it is also possible to record the minimum amount of data necessary. Since high-speed continuous shooting is done over a short period of time, the data hardly changes during that time, and the need can be met by recording the first frame. By not imprinting data from the second frame onward, consumption of the power battery can be kept to a minimum. Further, since the lighting command circuit outputs a lighting signal necessary for controlling the film winding drive device, it is possible to prevent film winding during data imprinting.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram of a data imprinting device according to an embodiment of the present invention attached to a camera together with an electric drive device, and Fig. 2 (6) (b) is a main switch according to an embodiment of the present invention. 3 and 4 are time charts of the operation of one embodiment of the present invention, sg is a circuit diagram showing another example of the lighting command circuit in the present invention, and FIG. 5
It is a time chart of the operation of the lighting command circuit shown by IHC. 1.-data imprinting device, 2.-electric drive device, 3.
-Camera, 8--Release methane, i 4! -Lighting command circuit, 22-imprint circuit, 23-imprint light source, 30-release button on signal, 30m--leading edge, 32-lighting command signal, t, -$L. Inclusion time, τr1−)Tungista. Sai2 Showa3al1 Sai4

Claims (1)

[Claims] 1. In the data imprinting device of a 5K camera that imprints data onto the film by lighting the imprint light, the release button /
Upon receiving the on signal, a lighting command that turns on the light source for imprinting for a predetermined period of time after the leading edge of the release button according to the leading edge of the release button on signal, and outputs a lighting signal necessary to control the film winding drive device. Camera data imprinting device 0 characterized by having a circuit