JPH05289169A - Auxiliary device for photographing - Google Patents

Abstract

PURPOSE:To prevent a camera from being uselessly released by changing an action mode. CONSTITUTION:This device is constituted of a transmitting device 10 which transmits a specified signal and a receiving device 20 which receives the specified signal and sends a control signal to the camera in accordance with the kind of the signal; and the device 10 is provided with a transmission button 4 for transmitting a transmission signal to the device 20, and a mode switch 3 for switching an interrupt mode 'INT' and a normal mode 'NORM', which is used also as a power source switch; in the case that the mode switch 3 changed over is changed over from the interrupt mode to the normal mode, the device 10 side transmits a reset signal, and the device 20 side does not send the control signal to the camera when it receives the reset signal, thereby preventing the camera from being needlessly released.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographing auxiliary device for photographing when a subject obstructs a space between a transmitter and a receiver opposed to each other.

[0002]

2. Description of the Related Art Conventionally, a photographing assisting device for photographing when a subject obstructs between a transmitting device and a receiving device which are opposed to each other,
It consists of a transmitting device that emits a specific signal and a receiving device that receives this signal and sends a control signal to the camera when the signal is interrupted, and changes the operation mode of the transmitting device, or When the power was turned off, the transmitting device stopped transmitting a specific signal.

[0003]

However, in the conventional photographing auxiliary device, if the operation mode is changed or the power is turned off while the transmitter is operating, the continuous signal transmission is stopped. In some cases, the receiving device determines that the subject blocks the space between the transmitting device and the receiving device, and sends a control signal such as a release signal to the camera to release the camera.

Therefore, the present invention has been made in order to solve the above-mentioned conventional problems, and an object thereof is to provide a photographing assisting device which prevents the camera from being unnecessarily released by changing the operation mode. To provide.

[0005]

In order to achieve such an object, the photographing auxiliary device according to the present invention transmits a reset signal when the transmitting device side is changed from the continuous transmission mode to another mode, On the receiving device side, when the reset signal is received, the control signal is not sent to the camera so that the camera is not released unnecessarily. Further, the mode switch of the transmitter is also used as a power switch so that the camera is not released unnecessarily by preventing the power from being turned off at once from the continuous transmission mode.

[0006]

According to the present invention, in the operation of releasing the camera when the subject crosses between the transmitter and the receiver opposed to each other, the transmission mode of the transmitter is changed or the power is turned off equivalently. It is possible to prevent the receiving device from determining that the subject has crossed and sending an unnecessary release signal to the camera.

[0007]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is an overall external view showing a configuration according to an embodiment of a photographing auxiliary device according to the present invention, FIG. 1 (a) is an external view of a transmitting device, and FIG. 1 (b) is an external view of a receiving device. In the figure, 10 is a transmitter, and 1 is a transmitter 10.
2, a mode switch for selecting and switching between a normal mode "NORM" and an interrupt mode "INT", which also functions as a power switch, 3 is a light emitting section for an optical signal, and 4 is a transmission button. Further, in FIG. 1B, 20 is a receiving device, 11 is a main body of the receiving device 20, 12 is a light receiving window for an optical signal, and 13 is a connector including a cable and a connector for connecting to a camera (not shown).

FIG. 2A is a circuit block diagram of the transmitter 10, and FIG. 2B is a circuit block diagram of the receiver 20. In FIG. 2A, BAT is a battery, MCU1 is a control microcomputer, SW1.
Is a mode switch and corresponds to the mode switch 3 also serving as the power switch in FIG. SW2 is a transmission button and corresponds to the transmission borane 4 in FIG. Also, R
Reference numeral 1 is a resistor, R2 is a resistor, LED is a light emitting diode that emits an optical signal, and Q1 is a transistor for driving the light emitting diode LED.

In FIG. 2B, SPD is a photodiode for receiving the optical signal output from the transmitter 10, AMP is an amplifier for amplifying the signal received by the photodiode SPD, and MCU 11 is for judging the received signal. Microcomputer for outputting camera control signal, R
Reference numeral 11 is a resistor, Q11 is a transistor for outputting a control signal to the camera, and GND and OUT are terminals for connecting to a camera (not shown), which corresponds to the connector 13 including the cable and the connector in FIG. 1B. ..

FIG. 3 is a view for explaining an example of use of the photographing assisting device according to the present invention. In FIG. 3, the receiving device 20 is attached to the camera C, and the transmitting device 10 sends a signal from a distance, and the camera C Release. Now, Figure 1
In (a), the mode switch 3 of the transmitter 10 is set to "N".
When the transmission button 4 is pressed in the "ORM" position, an optical signal is emitted, the receiving device 20 receives the optical signal, and the camera C is released by transmitting a release signal to the camera C.

Here, when the mode switch 3 of FIG. 1A is in the "INT" position, the transmitter 10 is adapted to continuously transmit optical signals at predetermined time intervals. When the receiving device 20 receives this signal, if the signal can be received at a predetermined time interval, the release signal is not sent to the camera C. If the signal cannot be received, the release signal is sent to the camera C. It has become. In FIG. 3, the camera C is released when a subject crosses between the transmitting device 10 and the receiving device 20 facing each other in the usage method in this mode, and unmanned photography is possible.

FIG. 4 shows a flowchart of the transmitter 10 according to the present invention. In the figure, when the power switch is turned on, the microcomputer MCU1
The operation of starts. First, in step 101, the state of the mode switch SW1 is read. Mode switch SW
If the state 1 is in the "NORM" position, step 1
Go to 02. In step 102, it is determined whether or not the send button SW2 is turned on, and if it is pressed, the process proceeds to step 103 to output a release signal. This signal is output from the light emitting diode LED of FIG. After outputting the release signal, the process returns to step 101. If the send button SW2 is not pressed in step 102, step 101
Return to.

If the mode switch SW1 is not in the "NORM" position in step 101, it is determined that the mode switch SW1 has been switched to the "INT" position, and the process proceeds to step 104. In step 104, a timer is set. This timer determines the time interval for outputting the signal at the "INT" position. Further, this timer is built in the microcomputer MCU1. In step 105, "IN
The signal at the position "T" is output, and when the time set in step 106 has elapsed, the process proceeds to step 107.

In step 107, the mode switch SW1
Is read, and if the mode is not in the "NORM" position, that is, if the "INT" position remains, the process returns to step 104. If the state of the mode switch SW1 has changed to the "NORM" position in step 107,
In step 108, a reset signal is output. This reset signal is a signal that informs the receiving device 20 that the mode at the "INT" position has ended. After transmitting the reset signal in step 108, step 10
Return to 1.

FIG. 5 shows a flowchart of the receiving apparatus 20 according to the present invention. In the figure, when the operation of the receiving device 20 starts, the signal transmitted from the transmitting device 10 is received in step 201. If no signal is received here, this operation is repeated. When the signal is received, the type is determined in step 202. If this signal is the signal at the "NORM" position, step 203
Then, a release signal is output to the camera C and the process returns to step 201. If the signal received in step 202 is not the position signal at "NORM", step 20
Go to 4.

In step 204, this signal is "INT".
It is determined whether or not the signal is the signal of the position of, and if it is the signal of the position of "INT", the process proceeds to step 205. Step 205
The timer is set with and the timer interrupt is enabled in step 206. Then, step 201
Return to. Here, the time set by this timer is set to be slightly longer than the timer time set by the transmitter. Therefore, if the signal of the position “INT” from the transmitter 10 is received within the timer time set by the receiver 20,
A timer is always set in step 205, and an interrupt by this timer does not occur.

If the subject blocks the transmission device 10 and the reception device 20, the signal at the position of "INT" sent from the transmission device 10 at a predetermined time interval cannot be received, so that the reception device 20 is not able to receive the signal. A timer interrupt will be generated. If a timer interrupt occurs, step 20
8, the release signal is output to the camera C, and the process returns to step 201. That is, when the subject blocks the transmission device 10 and the reception device 20, the camera C is released.

Here, the mode of the transmitter 10 is "NOR.
When it is changed to the position of "M", as described above, the transmitting device 1
A reset signal is transmitted from 0. If it is determined in step 204 that the signal is not the "INT" position signal, that is, the reset signal, the timer interrupt is prohibited in step 207, and the process returns to step 201. Therefore, at this time, the release signal is not sent to the camera C.

[0019]

As described above, according to the present invention,
When a mode of the transmission device is changed in a photographing auxiliary device that releases a shutter of a camera when a subject crosses between a transmission device and a reception device which are opposed to each other, a third signal is transmitted to the reception device. Therefore, it is possible to prevent the camera from being unnecessarily released by changing the mode. Further, since the switching means of the transmitting device also serves as a power switch, the power cannot be turned off directly from the first mode, and the second mode is always passed when the power is turned off. Is transmitted, so that the camera is not released needlessly, which is extremely effective.

[Brief description of drawings]

FIG. 1 is an external view showing the overall configuration of an embodiment of a photographing auxiliary device according to the present invention.

FIG. 2 is a block diagram showing a circuit configuration according to an embodiment of a photographing auxiliary device according to the present invention.

FIG. 3 is a diagram showing an example of use of the photographing auxiliary device according to the present invention.

FIG. 4 is a diagram showing a flow chart of a transmission device relating to the image capturing auxiliary device according to the present invention.

FIG. 5 is a diagram showing a flowchart of a receiving device relating to the image capturing auxiliary device according to the present invention.

[Explanation of symbols]

 1 main body of transmitter 2 light emitting part of optical signal 3 mode switch also serving as power switch 4 transmission button 10 transmitter 11 main body of receiver 12 light receiving window of optical signal 13 connector 20 receiver BAT battery MCU1 control microcomputer SW1 Mode switch also serving as power switch SW2 Send button R1 resistance R2 resistance LED light emitting diode Q1 transistor SPD photodiode AMP amplifier MCU11 microcomputer R11 resistance Q1 transistor GND terminal OUT terminal

Claims (2)

[Claims] 1. A transmission device that transmits a specific signal, and a reception device that receives the specific signal and transmits a control signal to a camera according to the type of the signal, wherein the transmission device is the reception device. To the operating means for transmitting a transmission signal, a first mode for continuously transmitting the first signal, and transmitting a second signal only when the transmitting operation of the operating means is performed. Switching means for switching between the first mode and the second mode, and transmits a third signal different from the first signal when it is detected that the mode has been switched from the first mode to the second mode. However, when the receiving device receives the first signal, it does not send a control signal to the camera while receiving the first signal, and the first signal is received within a predetermined time. When you could n’t, An imaging auxiliary apparatus having a third mode for transmitting a control signal, and canceling the operation in the third mode when the third signal is received while operating in the third mode. .. 2. The power source switch according to claim 1, wherein the switching means for switching between the first mode and the second mode also serves as a power switch, and the power is turned off unless the second mode is passed from the first mode. A shooting assistance device that is characterized by not becoming.