JPH0435870Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention is an external power connection terminal used in a flash discharge light emitting device that emits light by discharging electrical energy pre-stored in a main discharge capacitor through a flash discharge tube. Regarding.

``Prior art'' Especially large flash discharge light emitters used as lighting equipment for photography, etc. are charged by being connected to a commercial AC power source, or connected to a battery box containing a battery power source. The structure is such that it can be charged using a DC power source.

Such a flash discharge light emitting device includes a first connection terminal for an AC power source and a second connection terminal for a DC power source, and also prevents failures that occur when the AC power source and the DC power source are connected at the same time. In order to prevent malfunctions, a switching circuit member is provided that switches between connecting an AC power source and connecting a DC power source.

In addition, there are devices that are equipped with one connection terminal for an external power source and can connect either an AC power source or a DC power source, and the circuit is automatically switched depending on whether the AC power source is connected or the DC power source is connected.

``Problems to be Solved by the Invention'' The present invention relates to a flash discharge light emitting device that is separately provided with a first connection terminal for an AC power source and a second connection terminal for a DC power source.

In the case of this type of flash discharge light emitting device, if a finger or the like touches the second connection terminal while the alternating current power source is connected, the alternating current is transmitted to the human body, causing an electric shock. This problem can also occur if your fingers touch the charging terminal on the battery box (DC power source) while the AC power source and DC power source are connected, or when you replace the batteries in the battery box. A similar thing happened.

Therefore, the present invention is designed so that an external power supply corresponding to only one of the first and second connection terminals can be connected to the first and second connection terminals, and also to prevent hands and fingers from touching the second connection terminal when the AC power supply is connected. The purpose is to configure each connection terminal.

``Means for Solving the Problems'' Therefore, in the present invention, in a flash discharge light emitting device to which an external power source of an AC power source and a DC power source are connected as a charging power source, an AC power source with a plug-in structure is proposed. A first connection terminal and a second connection terminal for a DC power source are provided, and each of these connections is made such that the corresponding external power supply plug-in terminal connected to one of these connection terminals protrudes just in front of the plug-in socket of the other connection terminal. We propose an external power supply connection terminal in which terminals are arranged.

According to the present invention described above, when an AC power source is connected, the insertion terminal protrudes just in front of the insertion socket of the connection terminal for the DC power source, so connection of the DC power source is mechanically prevented, which is contrary to the above. To,
When the direct current power source is connected, the plug-in terminal of this power source likewise prevents a connection to the connection terminal for the alternating current power source.

In this way, the means to connect either the AC power source or the DC power source is achieved through the arrangement and configuration of the connecting terminals, making the design and production of the connecting terminals easy and the cost low. This is advantageous.

Furthermore, when the AC power source is connected, this connection terminal protrudes just in front of the insertion socket for the connection terminal of the DC power source, so that fingers and the like do not touch the second connection terminal, and there is no risk of electric shock.

"Example" Next, an example of the present invention will be described with reference to the drawings.

Figure 1 shows a flash discharge emitter circuit FL equipped with connection terminals according to the present invention and an AC power source as an external power source.
AC and DC power supply DC are shown.

In this figure, 1 is a first connection terminal for connecting an alternating current power supply AC, and 2 is a second connection terminal for connecting a direct current power supply DC.

As will be described later, these connecting terminals 1 and 2 both have a plug-in type, that is, a jack type structure, and the connecting terminal 1 has contacts 1a and 1b.
The connection terminal 2 is provided with contacts 2a to 2f, respectively. The AC power supply AC is a commercial AC power supply, and a plug-type plug-in terminal 3 equipped with contacts 3a and 3b is provided at the end of the cord pulled out from it, and by connecting this plug-in terminal 3 to the connection terminal 1, contact can be made. Children 1a, 3a and 1b, 3b are connected,
An alternating current power source AC is electrically connected to the flash discharge emitter circuit FL.

The DC power supply DC has the circuit configuration shown in Figure 2.
This is a so-called battery box.
A battery power source 4 and a DC-DC converter (oscillation transistor 6, step-up transformer 7, etc.) that boosts the DC voltage of the battery power source 4 when the power switch 5 is closed.
and an oscillation starting circuit including transistors 8 and 9.

A plug-type insertion terminal 10 is provided at the tip of the cord pulled out from this DC power supply DC, and contacts 10a and 10b of this terminal 10
The output voltage of the DC-DC converter is
The DC voltage of the battery power source 4 appears at the terminals c and 10d, and the base voltage of the transistor 9 appears at the contacts 10e and 10f, respectively.

By connecting the plug-in terminal 10 to the connection terminal 2, the contacts 2a, 10a, 2b, and 10
b, 2c and 10c, 2d and 10d, 2e and 10
e, 2f and 10f are in contact with each other, and the DC power source DC is electrically connected to the flash discharge emitter circuit FL.

As mentioned above, when the AC power supply AC is connected to the flash discharge light emitter circuit FL, the AC voltage is boosted by the voltage doubler circuit consisting of the capacitor 11 and diodes 12 and 13, and is half-wave rectified by the diode 14. and is added to the main discharge capacitor 15. During this charging process, the main discharge capacitor 15
And the trigger capacitor 16 is charged.

On the other hand, the AC voltage is applied to a double-wave rectifier 18 via a transformer 17, and a starting capacitor 19 is charged by the rectifier output.

The flash discharge light emitter circuit FL is charged by the alternating current power supply AC in the above-described operation, and when the X contact is closed in this charged state, the flash discharge tube 20 emits light. That is, when the X contact or test switch 22 connected to the synchro terminal 21 is closed, the charge in the starting capacitor 19 is discharged through the primary coil 23a of the signal transmission transformer 23, and the transformer 23 is discharged. The SCR 24 becomes conductive due to the induced voltage generated in the secondary coil 23b. From this, the flash discharge tube 20 emits light in a known manner under the operation of the trigger circuit including the trigger capacitor 16 and the trigger transformer 25.

Next, a case where a DC power supply DC is connected will be explained.

By connecting the contacts 2e, 10e and 2f, 10f, the base and emitter of the transistor 9 included in the DC power supply DC are short-circuited, and the transistors 9,
8 remains OFF. From this, when the power switch 5 is turned on, the oscillation transistor 6 is turned on and off.
The DC-DC converter starts oscillating. The output voltage of this converter is the contactor 2a, 1
The voltage is applied to the main discharge capacitor 15 via 0a, 2b, 10b and the diode 26, and this capacitor 15 and trigger capacitor 16 are charged in the same manner as described above.

Further, by connecting the contacts 2c, 10c and 2d, 10d, the starting capacitor 19 is connected to the battery power source 4 and charged.

The flash discharge light emitter circuit FL is charged by the DC power source DC as described above, and in this charged state, the X contact or test switch 22 is closed and the light is emitted, as described above.

Now, as mentioned above, AC power supply AC, DC power supply
DC must be configured so that either one is connected.

Therefore, in this embodiment, the first and second connection terminals 1 and 2 are constructed as shown in FIGS. 3 to 6. FIG. 3 is a side view of a flash discharge light emitting device equipped with the above-mentioned flash discharge light emitting device circuit FL, and FIG. 4 is a rear view of the flash discharge light emitting device. In these figures, 27 is a light emitter main body, 28 is a light emitting part, and the lower part of the light emitter main body 27 is provided with a first connection terminal 1 for AC power supply and a second connection terminal 2 for DC power supply. There is.

As shown in the figure, the first and second connection terminals 1 and 2 are provided in a part of the light emitter main body 27 that forms a horizontal surface and a vertical surface, so that the insertion direction of the first connection terminal 1 and the 2. An angle of 90° is provided to the insertion direction of the connecting terminal 2.

With this configuration, DC power supply
When the DC plug terminal 10 is inserted into the second connection terminal 2, a part of the plug terminal 10 protrudes into the front position of the first connection terminal 1, and the AC power plug is plugged into the first connection terminal. 3 is blocked by the insertion terminal 10 and cannot be inserted. FIG. 5 shows such a situation.

Contrary to the above, when the plug terminal 3 of the AC power supply AC is plugged in, the plug terminal 10 of the DC power supply DC is blocked by a part of this plug terminal 3, and the plug terminal 10 of the DC power supply DC is connected to the second connection terminal 2. It becomes impossible to insert. FIG. 6 shows such a situation. Note that the first and second connection terminals 1 and 2 may be installed so that the insertion direction is approximately 90 degrees and the insertion ports are adjacent to each other. It can be installed at an appropriate location.

"Effect of the invention" As described above, according to the connection terminal according to the invention, in a flash discharge light emitting device in which the first and second connection terminals of an AC power source and a DC power source as external power sources are provided separately, one of the connection terminals of the present invention can be used. Since only the connecting terminal can be connected to the corresponding external power source, and this effect is achieved by the arrangement of the first and second connecting terminals, the design and production of the connecting terminal are simplified.
Its production cost is low.

Furthermore, when the AC power source is connected, the first connection terminal protrudes just in front of the insertion socket of the second connection terminal, so that fingers and the like do not touch the second connection terminal, thereby preventing electric shock. Moreover, if the AC power supply is connected, the DC power supply cannot be connected.
There is no electric shock that could occur if your hands or fingers touch the charging terminal of the battery box or when replacing the battery.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a circuit diagram showing a flash discharge light emitter circuit, AC power supply, and DC power supply; Fig. 2 is a circuit diagram showing a specific example of a DC power supply; and Fig. 3 is a circuit diagram showing a flash discharge light emitter circuit, an AC power source, and a DC power supply. FIG. 4 is a side view of the flash discharge light emitting device, FIG. 4 is a rear view of the flash discharge light emitting device, and FIGS. 5 and 6 are partially enlarged sectional views of the light emitting device main body showing the connection state of an external power source. FL...Flash discharge light emitter circuit, AC...Alternating current power supply, DC...Direct current power supply, 1...First connection terminal, 2
...Second connection terminal, 3...Plug-in terminal for AC power supply, 10...Plug-in terminal for DC power supply, 27...
Light emitter main body, 28... Light emitting part.

Claims (1)

[Scope of utility model registration request] In a flash discharge light emitting device to which an external AC power source and a DC power source are connected as charging power sources, a first connecting terminal for the AC power source and a second connecting terminal for the DC power source are both provided with a plug-in structure, and ,
An external power supply connection terminal in which each of these connection terminals is arranged so that a corresponding external power supply insertion terminal connected to one of the connection terminals protrudes just in front of the insertion receptacle of the other connection terminal.