JPH0334080Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention provides for a flash discharge light emitting device in which a light emitting member and a light emitting device body are formed in a detachable manner. It relates to a connection terminal for electrically connecting.

``Prior Art'' Among flash discharge light emitting devices used as illuminators for photography, there are some in which a light emitting unit, a so-called head, is configured to be detachable from the main body of the light emitting device.
In this type of flash discharge light emitting device, the light emitting body and the light emitter main body are formed separately. Light emitter circuits such as a DC converter, a main discharge capacitor and a trigger circuit are each provided.

The light-emitting body is mechanically and removably connected to the light-emitting device body, but along with this connection, the light-emitting body and the light-emitting body are electrically connected, and generally This electrical connection connects the pin plug provided on the light emitting unit and the pin receiving jack provided on the main body of the light emitting device. The flash discharge light emitting device described above connects any light emitting body to the light emitter body, such as a light emitting body with different guide numbers and irradiation angles, or a light emitting body equipped with a zoom mechanism for the irradiation angle, to create the appropriate illumination for the shooting situation. It is advantageous and can be expected to be effective.

"Problems to be Solved by the Invention" In a flash discharge light emitting device in which the light emitting body is detachable from the light emitting body as in the conventional example described above, as already mentioned, the light emitting body and the light emitter body are connected to each other. For example, the light emitting unit is provided with a plug terminal having a pin plug to which the main electrode of the flash discharge tube is connected and a pin plug to which the excitation electrode is connected, and the light emitting body is provided with a connection terminal for electrical connection. is provided with a bayonet terminal having a pin receiving jack connected to the main discharge capacitor and a pin receiving jack connected to the trigger circuit.

When the light emitting body is connected to the light emitter main body, the above-mentioned plug terminal is inserted into the plug receiving terminal to make an electrical connection, and the main electrode of the flash discharge tube is connected to the main discharge capacitor, and its excitation electrode is connected to the trigger circuit. Connected.

By the way, the above-mentioned pin-type connection terminals may burn out due to improper insertion, which may cause failure of the flash discharge light emitting device.

That is, when flashlight is emitted, a large current rapidly flows from the main discharge capacitor to the flashlight discharge tube. Therefore, if the insertion is uncertain and the electrical resistance is high, heat will be generated in the connection terminal and the pin plug will seize.

The larger the flash discharge light emitting device is, and the more the light emission starts repeatedly within a short period of time, the more the problem of burn-in becomes more apparent.

If the plug-in terminal is always fully plugged in, the above problems will rarely occur, but the light-emitting unit may be quickly replaced with another light-emitting unit at the shooting location, and the connection terminal must be fully connected. I often end up taking flash photography even though it is not in the camera, and I often carry around the light emitting unit while it is connected to the main body of the light emitting device, so the plug-in terminal of the light emitting device may come loose while I am carrying it around. When this occurs, you may end up taking flash photography without noticing this condition.

"Means for Solving the Problems" The purpose of the present invention is to reliably prevent the burnout of the connection terminals as described above with a simple configuration.

Therefore, the present invention includes a light-emitting unit equipped with a flash discharge tube, a main discharge capacitor that discharges electrical energy through the flash discharge tube, and a trigger circuit that applies excitation pressure to the flash discharge tube to start the emission. In the flash discharge light emitting device, the light emitting body is formed separately from the light emitting body, and the light emitting body is detachably connected to the light emitter body, and one of the light emitting body and the light emitter body includes: A plug-in terminal having a light emitting circuit connector for connecting the flash discharge tube and the main discharge capacitor and a trigger circuit connector for connecting the trigger circuit; The present invention proposes a connection terminal for a flash discharge light emitting device, which is provided with a plug-in receiving terminal having a plug-in terminal, and in which a trigger circuit connector of the plug-in terminal is formed to have a shorter insertion length than a light-emitting circuit connector.

As mentioned above, the trigger circuit connector of the plug-in terminal has a shorter insertion length than the light emitting circuit connector, so if it is not inserted sufficiently or if it comes out a little, The trigger circuit connector separates from the insertion terminal. As a result, if the connection terminal is in an unreliable plug-in state, no excitation voltage will be applied to the flash discharge tube regardless of whether the trigger switch is closed.
The flash discharge tube does not emit a flash. In other words, if the connection terminal is not fully inserted, no current will flow through the connection terminal, so there is no risk of burnout.

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

FIG. 1 shows a first embodiment of a flash discharge light emitter circuit equipped with a connection terminal according to the present invention, in which the chain line A is a circuit diagram of a light emitting body, 1 is a flash discharge tube, 1a, 1b.
is the main electrode, and 1c is the excitation electrode.

In addition, the light emitting body has pin plugs (pin connectors) 2 for the light emitting circuit connected to the main electrodes 1a and 1b.
a, 2b, a pin plug (pin connector) 2c connected to the excitation electrode 1c, and a pin plug (pin connector) 2d, 2e connected by a circuit line 3 forming a part of the trigger circuit. terminal 2
is provided.

The pin plugs 2c, 2d, 2e are for the trigger circuit, and in particular, in this embodiment, only the pin plugs 2d, 2e are used for the other pin plugs 2a, 2b,
It is formed shorter than 2c.

Inside the chain line B is a circuit diagram of the main body of the light emitter, in which 4 is a battery power supply, 5 is a power switch, 6 is a converter, and 7 is a rectifier diode, and each of these members 4 to 7 forms a power supply circuit.

8 is a main discharge capacitor charged by the converter 6 before the start of light emission.

9 is a trigger capacitor, 10 is a trigger transformer, 11 is an SCR, 12 is a starting capacitor,
13 is a trigger switch, 14 is a zena diode, 15 is a neon lamp, and each of these components 9 to
15 forms a trigger circuit. In addition, the above
When the trigger switch 13 is closed, the SCR 11 receives a gate current from the starting capacitor 12 and becomes conductive, thereby starting the trigger circuit. Further, the neon lamp 15 is a charge display lamp that lights up when the main discharge capacitor 8 is charged to a predetermined charging pressure.Also, when lit, this lamp 15 charges the starting capacitor 12 and is used to charge the trigger circuit. is ready for operation.

16 is SCR, 17 is commutating capacitor, 18 is
In the SCR, these members 16 to 18 form a light emission stop circuit, and the SCR 18 operates when the SCR 18 is made conductive by a dimming signal supplied from the sensor 19. Note that the sensor 19 is a known sensor equipped with an optical integration circuit.

20 and 21 are resistors, 22 is a capacitor, and each of these members 20 to 22 is used for starting light emission.
It forms an impedance circuit that makes the SCR 16 conductive.

On the other hand, the main body of the light emitter includes a plug-in terminal 23 having pin receiving jacks (pin receiving connectors) 23a to 23e.

This terminal 23 has a jack 23a connected to the main discharge capacitor 8 and a jack 23b connected to the SCR 16, respectively, and is arranged so as to face the pin plug 2, a2b for the light emitting circuit described above.
Further, the jack 23c is connected to the high voltage side of the trigger transformer 10, the jack 23d is connected to the main discharge capacitor 8 via the resistor 24, and the jack 23e is connected to the resistor 25.
are connected to the neon lamps 15 through the pin plugs 2 for the trigger circuit described above.
c, 2d, and 2e.

In the above embodiment, by connecting the light emitting body to the light emitter main body, the insertion terminal 2 is inserted into the insertion receiving terminal 23, and the light emitting member and the light emitter main body are electrically connected.

That is, when the main discharge capacitor 8 is charged to a predetermined charging voltage, the resistor 24, pin receiving jack 23d, pin plug 2d, circuit wire 3, pin plug 2e, pin receiving jack 23e, resistor 25, neon lamp 15, and Zener. A current flows through the path of the diode 14, lighting up the neon lamp 15 and charging the starting capacitor 12.

In the above charging state, trigger switch 1
3 is closed, a high voltage is generated on the secondary side of the trigger transformer 10 due to conduction of the SCR 11,
This high voltage is applied as an excitation voltage to the flash discharge tube 1 through the path of the pin receiving jack 23c, the pin plug 2c, and the excitation electrode 1c, and from this, the flash discharge tube 1
starts to emit light.

The current from the main discharge capacitor 8 for causing the flash discharge tube 1 to emit light is supplied to the pin receiving jack 23a,
Pin plug 2a, flash tube 1, pin plug 2
b, pin receiving jack 23b, and SCR 16.

Note that the SCR 16 receives gate current from the impedance circuits 20, 21, and 22 to conduct when starting light emission, and the SCR 16 also conducts when the sensor 19
When the dimming signal is generated, the SCR 16 becomes conductive, and the charging voltage of the commutating capacitor 17 causes the SCR 16 to become non-conductive and stop emitting light. Since it is not directly related, its explanation will be omitted.

If the connection between the plug-in terminal 2 and the plug-in receiving terminal 23 is sufficient, flash photography can be performed by the above-mentioned light emitting operation, but if the plug-in terminal 2 is not fully inserted or the terminal 2 is slightly pulled out. Sometimes, the pin plugs 2d and 2e for the trigger circuit, which have a short insertion length, are connected to the pin receiving jack 2.
3d and 23e.

Therefore, even if the main discharge capacitor 8 is charged to a predetermined charging voltage, the neon lamp 15 does not light up.

The trigger circuit is configured to operate by closing the trigger switch 13 after the neon lamp 15 lights up, so as long as the neon lamp 15 is off, the flash discharge tube 1 will not be activated even if the trigger switch 13 is closed. No excitation voltage is applied, and the flash discharge tube 1 does not start emitting light.

That is, if flash photography is started in a state where the connection between the plug terminal 2 and the plug receiving terminal 23 is insufficient, the flash discharge tube 1 will not emit light, and therefore the pin plugs 2a, 2b and the pin receiving jack 23 will not emit light.
Since no current flows through a and 23b, seizing will not occur even if these are in insufficient contact.

In this embodiment, as long as the electrical connection of the light emitting body is insufficient, the neon lamp 15 remains off, so it is possible to detect this insufficient connection state. Alternatively, a lamp 26 may be provided on the circuit line 3 of the light emitting body.

In the first embodiment described above, the pin plugs 2d and 2e for the trigger circuit are formed to have short insertion lengths, but only one of these pin plugs may be formed short. As shown as an example, all of the pin plugs 2c, 2d, 2e for the trigger circuit may be shortened. Next, FIG. 3 shows a third embodiment in which a plate-shaped insertion terminal 27 is provided on the light emitting body, and an insertion receiving terminal 28 having a terminal receiving hole into which the terminal 27 is inserted is provided on the light emitting device body.

The plug-in terminal 27 has conductive connectors 27a to 27e provided on the surface of an insulating plate, and can be constructed from a printed circuit board. This terminal 27 has cutouts at both lower sides of the terminal plate to shorten the insertion length of the trigger circuit connectors 27d and 27e.

The insertion receiving terminal 28 has conductive connectors 28a to 28e provided in the terminal receiving hole.

The connection between the insertion terminal 27 and the circuit of the light emitting body, and the connection between the insertion terminal 28 and the circuit of the light emitter body are the same as in the embodiment of FIG. 1, and also in this embodiment. The same effect can be obtained.

Figure 4 shows pin plugs 2d and 2 for the trigger circuit.
e and the corresponding pin receiving jack 23
d and 23e are removed, and the insertion length of the pin plug 2c for the trigger circuit is shortened.

However, when configured as in the embodiment, the neon lamp 15 is connected to the main discharge capacitor 8 via a resistor 25.

"Effects of the invention" As mentioned above, in the connection terminal according to the present invention, the trigger circuit connector provided on the insertion terminal is formed with a shorter insertion length than the light emitting circuit connector. If the plug is not inserted sufficiently or if it comes out a little, part of the trigger circuit will be cut off and no excitation voltage will be applied to the flash discharge tube.

Therefore, if the electrical connection between the light emitting unit and the light emitter main body is insufficient, no flash will be emitted regardless of the flash photography operation, so the connection terminal will not be burnt out.

Further, if the flash does not emit light in the test light emission operation, it is known that the connection of the connection terminal is insufficient, so the condition can be known before flash photography.

In addition, in the connection terminal according to the present invention, the insertion terminal may be provided on the light emitting device body, and the insertion terminal may be provided on the light emitting body.

[Brief explanation of the drawing]

FIG. 1 shows a first embodiment of the present invention, which is a circuit diagram of a flash discharge emitter circuit equipped with a connecting terminal, and FIG. 2 is a partial circuit diagram showing a second embodiment in which a part of the connecting terminal is changed. FIG. 3 is a partial circuit diagram as a third embodiment showing a connection terminal having a plate-shaped insertion terminal;
The figure is a circuit diagram of a flash discharge light emitting device as a fourth embodiment in which one pin plug is used for the trigger circuit and the insertion length of this pin plug is shortened. 1...Flash discharge tube, 1a, 1b...Main electrode, 1
c...Excitation electrode, 2...Plug-in terminal, 2a-2
e...Pin plug, 23...Plug-in terminal,
23a to 23e...pin receiving jacks.

Claims (1)

[Claims for Utility Model Registration] (1) (1) A light-emitting unit equipped with a flash discharge tube, a main discharge capacitor that discharges electrical energy through the flash discharge tube, and an excitation voltage applied to the flash discharge tube to emit light. In a flash discharge light emitting device having a configuration in which a light emitting device body including a trigger circuit for starting is formed separately and the light emitting portion body is detachably connected to the light emitting device body, either of the light emitting portion or the light emitting device body. On one side, a plug terminal having a light emitting circuit connector for connecting the flash discharge tube and the main discharge capacitor and a trigger circuit connector for connecting the trigger circuit, and on the other side,
A flash discharge comprising a plug-in terminal having a connector corresponding to each of the connectors, and a trigger circuit connector of the plug-in terminal having a shorter insertion length than a light-emitting circuit connector. Light emitter connection terminal. (2) The light emitting body is provided with a part of the trigger circuit, a light emitting circuit connector connected to the main electrode of the flash discharge tube, a first connector connected to the excitation electrode of the flash discharge tube, and the above. A plug-in terminal having a trigger circuit connector connected to a part of the trigger circuit connected to the second connector is provided on the light emitting device body, and the light emitting device body is provided with a plug terminal having a trigger circuit connector connected to the main discharge capacitor and corresponding to the light emitting circuit connector. a connector, and a first and second connector connected to the trigger circuit and for the trigger circuit.
A practical use in which a plug-in terminal having a connector corresponding to the connector is provided, and all or part of the trigger circuit connector of the plug-in terminal is formed to have a shorter insertion length than the light-emitting circuit connector. A connection terminal for a flash discharge light emitting device as set forth in claim (1) of patent registration. (3) A plug-in terminal having a light-emitting circuit connector connected to the main electrode of the flash discharge tube and a trigger circuit connector connected to the excitation electrode of the flash discharge tube is attached to the light-emitting body. The main body is provided with a plug-in terminal having a connector connected to the main discharge capacitor and corresponding to the light emitting circuit connector, and a connector connected to the trigger circuit and corresponded to the trigger circuit connector, A connection terminal for a flash discharge light emitting device as set forth in claim (1) of the utility model registration claim, wherein the trigger circuit connector of the insertion terminal is formed to have a shorter insertion length than the light emitting circuit connector.