JPH0321939A - Stroboscopic remote control receiver - Google Patents

Abstract

PURPOSE:To excellently operate a receiver without providing a power source such as a dry battery by making a control circuit operable through the use of the charge of a power source capacitor as the power source when remote control light from a commander is received. CONSTITUTION:A control terminal 25 is connected to the power source capacitor 27, and therefore when this control terminal 25 is connected to the terminal 8 to be controlled of a stroboscope, a current from the power source of the stroboscope flows into the power source capacitor 27 via the terminal 8 and the control terminal 25, and the power source capacitor 27 is charged. When a light receiving element 17 receives the remote control light from the com mander, the control circuit 21 is operated by using the charge of the power source capacitor 27 as the power source and the light emitting element 4 of the stroboscope is emitted by the output signal of the control circuit 21. Thus, the stroboscope remote control receiver is excellently operated without providing a power source such as a dry battery or it.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a strobe remote control receiver used for remotely controlling a strobe of a camera lighting accessory. [Summary of the Invention] The present invention relates to a strobe remote control receiver used to remotely control a strobe as a lighting accessory for a camera. A power supply capacitor, a light receiving element,
When this light-receiving element receives remote control light from the commander, the charged charge of this power supply capacitor is supplied as a power source to this control circuit to put this control circuit into an operating state. By causing the light emitting element of the strobe to emit light in response to an output signal from a control circuit, the strobe remote control receiver can be operated satisfactorily without the need for a power source such as a dry battery.

[Conventional technology]

FIG. 2 shows a commonly used remotely controllable strobe. To explain the strobe shown in Fig. 2, (1) in Fig. 2 indicates a battery, and the voltage across the battery (1) is boosted by a DC-DC converter circuit (2), and is used as a power source. For example, set the voltage across the capacitor (3) to 50
Set it to 0V. The voltage between one end and the other end of this power supply capacitor (3) is supplied between one and the other electrodes of the Secnon discharge tube (4) that constitutes the light emitting element of the strobe, and one end of this power supply capacitor (3) resistor (5
) and a Zener diode (6) having a Zener voltage of, for example, 15V. This Zener diode (6) is equipped with a manual connection switch (7), and in this remotely controllable strobe, the cathode side of this Zener diode (6) is connected to the hot contact <8a> of the controlled terminal (8). Then, the cool contact (8b) of this controlled terminal (8) is connected to the anode side of this Zener diode (6). Also, one end of the power supply capacitor (3) is connected to the SCR (10 ), and the cathode of this S C R (10) is connected to the anode of the diode (
1l> to the other end of this power supply capacitor (3), and connect the gate of this SCR (10) to a resistor (
12> and a capacitor <13> to the other end of this power supply capacitor (3).

In addition, the cathode of this SCR (10) is connected to the cathode of the Zener diode (6), and the SCR
The anode of (10) is connected to the other end of the electric power capacitor (3) through a series circuit of the capacitor (15) and the primary winding (16a) of the transformer (16), and the xenon discharge tube (4 ) is connected to the other end of this power supply capacitor (3) via the secondary winding (16b) of this transformer (16).

The strobe shown in Fig. 2 connects the trigger electrode of the xenon discharge tube (4) when the connection switch (7) is turned on or when the hot contact (8a) and the cool contact (8b) of the controlled terminal (8) are short-circuited. A trigger pulse is supplied to (4a), and this xenon discharge tube (4) emits light.

Conventionally, a strobe remote control receiver as shown in FIG. 3 has been used to remotely control a strobe as shown in FIG. 2 from a camera. In this Figure 3, (17) indicates a phototransistor to which remote control light, such as infrared rays, is supplied from a commander (not shown) installed in the camera, and the collector of this phototransistor (7) is connected to a resistor. (18) is connected to the positive electrode of the battery (19), and the emitter of this phototransistor (17) is connected to the negative electrode of the battery (19) through a resistor (20). The control signal obtained from the emitter is supplied to the control circuit (2l).This control circuit (21
) is S C R (2
2) is designed to generate a control pulse that turns on. This control circuit (21) has a battery (1
9) Power is supplied from. The control pulse obtained at the output side of this control circuit (21) is SCR
(22) is supplied to the gate. This SCR
The gate of (22) is connected to the resistor (23〉) and the capacitor (
24) to the negative electrode of this battery (19), and the cathode of this SCR (22) to the battery (19).
9) and this SCR (22)
Connect the anode of the strobe to the hot contact (25a) of the control terminal (25>) connected to the controlled terminal (8) of the strobe, and connect the hot contact (25a) of this control terminal (25) through the resistor (26>). and connect it to the positive electrode of this battery (19).The cool contact (25b) of this control terminal (25)
is electrically floating.

When using the strobe remote control receiver shown in FIG. 3, this control terminal (25) is connected to the controlled terminal (8) of the strobe. In this case, the hot contact (2) of the control terminal (25)
5a) and the hot contact (8a) of the controlled terminal (8) are connected, and this cool contact (25b) and (8) are connected.
b) Comrades are connected. In this state, when the remote control light from the camera commander is supplied to the phototransistor (l7), the SCR (22) is turned on and the hot contact (25a) of the control terminal (25) is grounded, so that the controlled terminal The hot contact (8a) of (8) is also grounded and the xenon discharge tube (4) of the strobe emits light. Therefore, a strobe as shown in FIG. 2 can be remotely controlled.

[Problem to be solved by the invention]

In such a conventional strobe remote control receiver, the control circuit (21) and the like are operated by the battery (19) installed inside the strobe remote control receiver. ), and if the strobe remote control receiver is left unused for a relatively long period of time, this battery (19) will naturally wear out. When trying to remotely control the strobe using the control circuit (21)
etc. do not work, and even when the strobe is working normally, it is impossible to remotely control it, leading to the inconvenience that it may be mistaken as if there is some sort of malfunction.

In view of this, it is an object of the present invention to improve the above-mentioned disadvantages by enabling this strobe remote control receiver to operate satisfactorily without providing a power source such as a dry battery.

Means for Solving Problem C] The strobe remote control receiver of the present invention has a control terminal (2) connected to a controlled terminal (8) of a strobe, as shown in FIG.
5>, a power supply capacitor (27) connected to this control terminal (25), a light receiving element (17), and a control circuit (21), and this light receiving element (17) is connected remotely from the commander. When the control light is received, the charged charge of this power supply capacitor (27) is supplied as a power source to this control circuit (21) to put this control circuit (21) into an operating state, and this control circuit (21) is activated. (2
The output signal of step 1) causes the light emitting element (4) of this strobe to emit light.

[Effect]

According to the present invention, the power supply capacitor (
2T) is connected, so when this control gE terminal (25) is connected to the controlled terminal (8) of the strobe,
Current from the strobe power supply flows to this power supply capacitor (27) via this controlled input terminal (8) and control terminal 25).
is charged and the light receiving element (17) receives remote control light from the commander, this power supply capacitor (27)
The control circuit (21) is operated using the charged electric charge as a power source, and the output signal of this control circuit (2l) causes the strobe light emitting element (4) to emit light. It can be operated satisfactorily without the need for a power supply.

[Embodiment] An embodiment of the strobe remote control receiver of the present invention will be described below with reference to FIG. In FIG. 1, parts corresponding to those in FIG. 3 are designated by the same reference numerals, and detailed explanation thereof will be omitted.

In this example, the hot contact (25a) of the control terminal (25) connected to the controlled terminal (8) of the strobe is connected to the power supply via a series circuit of a resistor (28) and a rectifier diode (29). The cool contact (25b) of this control terminal (25) is connected to one end of the capacitor (27) for
is connected to the other end of this power supply capacitor (27). In addition, remote control light, such as infrared rays, is supplied from a commander (not shown) provided in the camera via a resistor (30) at the connection point between the resistor (28) and the diode (29).
The emitter of this phototransistor (17) is connected to the collector of the transistor (17), and the emitter of this phototransistor (17) is connected to the power supply capacitor (2).
7) Connect to the other end. This phototransistor (17)
The control signal obtained at the collector of this transistor (17) when remote control light is supplied to the diode (
31) to the control circuit (21), and this control signal is also supplied to the base of the PNP transistor (32) constituting the switch.

This control circuit (21) is a phototransistor (1
7) is irradiated with remote control light and a control signal is supplied to generate a control pulse that turns on SCR (22).

Connect one end of this power supply capacitor (27) to the emitter of this transistor (32), and
The collector of 2) is connected to the power supply terminal of the control circuit (2l), and the common terminal of this control circuit (2l) is connected to the other end of the power supply capacitor (27>).

In this case, when the phototransistor (17) is supplied with remote control light, the control signal obtained at the collector of this phototransistor (17) causes this transistor {32}
is turned on, and at this time, this charged charge is supplied from the power supply capacitor (27) as a power source to the control circuit (21), and at this time, this control circuit (21) is put into an operating state.The output of this control circuit (21) The control pulse obtained on the side is supplied to the gate of the SCR (22).The gate of this SCR (22) is connected to the resistor (22).
23> and the other end of the power supply capacitor (27) via a parallel circuit of the capacitor (24), and this S C
Connect the cathode of R (22) to this power supply capacitor (2
7) Connect to the other end and connect this SCR (22)
The anode of the strobe is connected to the hot contact (25a) of the control terminal (25) which is connected to the controlled terminal (8) of the strobe.

When using the strobe remote control receiver according to this embodiment, the control terminal (25) is connected to the controlled terminal (8) of the strobe as shown in FIG. In this case, the control terminal (
25) hot contact (25a) and controlled terminal (8)
The hot contact (8a) is connected to the control terminal (2a), and the control terminal (2a)
The cool contact (25b) of 5) and the cool contact (8b) of the controlled terminal (8) are connected. At this time, the voltage across the Zener diode (6) of the strobe is, for example, 15V.
is applied between the hot contact (25a) and the cool contact (25b> of this control terminal (25), and when this control terminal (25) is connected to the controlled terminal (8), this hot contact (25a) → resistor (28) - diode (29) → power supply capacitor (27) - cool contact (251))
A current flows and charges this power supply capacitor (27). In this state, when remote control light from the camera commander is supplied to the phototransistor (17), the control signal obtained from the collector of this phototransistor (17) turns on the transistor (32) that controls the switch. , the charge in the power supply capacitor (27) is supplied as a power source to the control circuit (21) to put the control circuit (2) into an operating state, and at this time, the control circuit (21) A control pulse is generated by the signal, and this control pulse causes S C
Since R (22) is turned on, the hot contact (25a) and cool contact (25111) of this control terminal (25>)
short circuit, i.e. hot contact (8a) of controlled terminal (8)
) and the cool contact (8b) are short-circuited, the xenon discharge tube (4) of the strobe emits light, and the strobe as shown in FIG. 2 can be remotely controlled.

According to this example, the power supply capacitor (27) is charged by the current from the strobe;
) is used as a power source only when the control circuit (2l) is operating to operate this control circuit (21), so this strobe remote control receiver does not require a power source such as a dry battery, and it works well. There are benefits that can be made to work.

Therefore, according to this example, the strobe remote control receiver is not equipped with a dry battery, etc., so it can be made smaller and lighter, and the battery will not naturally wear out even if left unused for a long time, so the strobe can be controlled remotely at all times. There are profits that can be made.

It goes without saying that the present invention is not limited to the above-described embodiments, and that various other configurations can be taken without departing from the gist of the present invention.

Even if you leave it alone, the battery will not run out naturally, and the benefit is that you can always control the strobe remotely.

[Brief explanation of the drawing]

Fig. 1 is a structural diagram showing one embodiment of the strobe remote control receiver of the present invention, Fig. 2 is a structural diagram showing an example of a strobe, and Fig. 3 is a structural diagram showing an example of a conventional strobe remote control receiver. It is. (4) is a xenon discharge tube, (6) is a Zener diode, (8) is a controlled terminal, (17) is a phototransistor,
<21) is the control circuit, (22) is the SCR, (2
5) is the control terminal, (27) is the power supply capacitor, (29
) is a diode, and (32) is a transistor. [Effects of the Invention] According to the present invention, there is an advantage that the strobe remote control receiver can be operated satisfactorily without providing a power source such as a dry battery. Also, according to the present invention, strike. Since the robot remote control receiver does not require batteries, etc., it can be made smaller and lighter, and it can be used for a long time. Gravel 0 ike}Figure 3

Claims (1)

[Claims] It has a control terminal connected to a controlled terminal of the strobe, a power supply capacitor controlled by the control terminal, a light receiving element, and a control circuit, and when the light receiving element receives remote control light from a commander. , the electric charge of the power supply capacitor is supplied as a power source to the control circuit, the control circuit is put into operation, and the light emitting element of the strobe is caused to emit light by the output signal of the control circuit. Strobe remote control receiver.