JPS61165739A - Flash light emitting device and electric power supply for modeling lamp - Google Patents

Abstract

PURPOSE:To execute the specified number of times of flash light emitting without fail without damaging the portable property and the operability by simultaneously connecting with an external electric power source connecting terminal when the external electric power source is connected, and either of the flash light emitting device and the modeling lamp to the external electric power source connecting terminal and providing a change-over means to insulate from the internal electric power source. CONSTITUTION:When an external electric power supply 13 is not fitted, armatures (a) and (b) of a change-over switch 12 goes to be in a conducting condition, a switch 20 is turned on, and then, the electric power source is supplied from an internal electric power source 15 to a modeling lamp 6. When the connecting plug 13a of the external electric power supply 13 is fitted to an external electric power source connector 11, the front surface of the connecting plug 13a presses an electric power source change-over operating pin 9, and therefore, the electric power source change-over operating pin 9 is shifted in the left direction against a coil spring 10, the conducting condition of the armatures (a) and (b) of the change- over switch 12 is released and armatures (a) and (c) are set to the conducting condition. Thus, when the switch 20 is turned on, the electric power source is supplied from an external electric power source 21 to the modeling lamp 6 at this time.

Description

Detailed Description of the Invention (Field of Application of the Invention) The present invention relates to a flashlight emitting device and a modeling lamp power supply device that have an internal power source that supplies power to both a modeling lamp and a flashlight device used for close-up photography, etc. Regarding improvements.

(Background of the Invention) FIG. 7 shows a state in which a conventional device of this type is attached to a camera, in which the control/power supply device l is attached to the accessory shoe of the camera 2, and the light emitter 3 is attached to the photographing lens 2a. The control/power supply device 1 and the light emitter 3 are connected by a cord 4. As shown in FIG. 8, the above-mentioned light emitting device 3 includes, in addition to the flash discharge tube 5 for emitting flash light, a device for adjusting the shooting distance before shooting, determining the composition, and checking the illumination condition (lighting) of the subject. A modeling lamp 6 is provided for auxiliary illumination. modeling lamp 6
Usually, tungsten lamps are used as the lamps, and a plurality of tungsten lamps are arranged near each flash discharge tube 5 so that their light distribution characteristics match those of the flash discharge tubes 5.

When taking close-up shots, the external light that reaches the subject is often blocked by the camera 2 or the photographer, and in such cases, the shooting distance may be adjusted or the composition corrected while the modeling lamp 6 remains lit. It is necessary to These tasks before photography usually take a long time, and the lighting time of the modeling lamp 60 is also long, and the amount of current consumed by the modeling lamp 6 is quite large, so a relatively large power source is required. shall be.

However, in this type of device, the power source is unified in order to achieve miniaturization and not to impair its operability, and the flash light is supplied from the internal power source housed in the control/power supply device 1. It supplied power to the discharge tube 5 and modeling lamp 6. In this way, since the configuration is such that power is also supplied to the modeling lamp 6 from one power source, the recycling time (
This has the disadvantage that the time it takes for the main capacitor to be charged with the voltage necessary to discharge the flash discharge tube 5 is significantly impaired. This is because a voltage drop occurs while power is being supplied to the modeling lamp 6, and because the modeling lamp 6 is used in parallel with the modeling lamp 6, the power supply is quickly consumed, which impairs the ability to take quick pictures. Also.

The power supply for such a device is normally one that has enough power capacity to satisfy the specified normal number of flashes; , the lighting time becomes long and is consumed by professionals, so the number of times the flash can be emitted is affected by the frequency of use of the modeling lamp 6.
The drawback was that the number of flashes could not be specified under a common power source.

As one of the measures to eliminate the drawbacks mentioned above,
A proposal has been made to automatically turn off the modeling lamp 60 after a predetermined period of time after it has been turned on, to minimize current consumption, but since the work before shooting originally takes a long time, there is no fundamental countermeasure. I haven't been able to become one. It is also possible to use a relatively large-capacity external power source as a power source for the flash discharge tube 5 and the modeling lamp 6, but using an external power source as a common power source for the modeling lamp 6 and the flash discharge tube 5 does not work as described above. Similarly, there is no difference in that the number of flashes that can be emitted depends on the frequency of use of the modeling lamp 6, and that the recycling time is not as effective as expected.

As another measure, a proposal has been made to use the internal power source as a dedicated power source for the flash discharge tube 5, and to supply power to the modeling lamp 6 from an external power source. Although this proposal has the advantage of being able to specify the number of flashes because it has a dedicated power source for the flash discharge tube 5, it is not possible to light the modeling lamp 6 without an external power source, so it is difficult to take pictures. Even when the number of lamps is small (when the lighting time of the modeling lamp 60 is short), there is a problem that an external power source must be carried at all times. Such an external power supply is usually large in size because it has a large capacity that can sufficiently guarantee the lighting time of the modeling lamp 60 hours. Even if it is used as a common power source, it is desirable to avoid using it in cases where there is no problem that would adversely affect the internal power source.

Conversely, a method of supplying power only to the flash discharge tube 5 from an external power source is conceivable, but this causes the inconvenience that flash photography itself cannot be performed without an external power source.

(Object of the Invention) The object of the present invention is to solve the above-mentioned problems and to provide a flashlight emitting device and a modeling lamp capable of reliably emitting a specified number of flashes without impairing portability or operability. It is to provide a power supply device.

(Features of the Invention) In order to achieve the above object, the present invention provides an external power supply connection terminal to which an external power supply is connected, and one of a flashlight emitting device and a modeling lamp is connected to the external power supply connection terminal, and at the same time an internal A switching means is provided to cut off the power supply,
The present invention is characterized in that when an external power source is connected, the external power source and the internal power source are switched as exclusive power sources for the flashlight emitting device and the modeling lamp, respectively.

(Embodiments of the Invention) Hereinafter, the present invention will be described in detail based on illustrated embodiments.

1 to 4 are diagrams showing one embodiment of the present invention. The same parts as in FIG. 7 are represented by the same symbols. In Figures 2 to 4,
Reference numeral 7 denotes a control/power supply device that is attached to the 7-part accessory of the camera 22, and a positive terminal 8a and a negative terminal 8b are provided on its side.

An external power connector 11 comprising a coil spring 10 is provided which always urges the power switching pin 9 and the power switching pin 9 in the right direction (see FIG. 3). 12 is a changeover switch located behind the external power connector 11;
It is composed of contact pieces a to C, and normally contact pieces a and b are in a conductive state. Reference numeral 13 denotes an external power supply device having a larger capacity power supply than the internal power supply (described later) housed in the control/power supply device 7, and a connection glove 13a is attached to the aforementioned external power supply connector 11 (see Fig. 4). As a result, the conductive piece d and the glass terminal 8a are connected to the conductive piece e and the negative terminal 8.
b are in contact with each other, and an external power source is connected to the flash discharge tube 5. It will be supplied to either one of the modeling lamps 6.

FIG. 1 shows a circuit diagram when the above-mentioned devices are connected. 14 is a power switch, 15 is an internal power supply, 16
is a DC/DC converter, 17 is a main capacitor, and 18 is a flash discharge tube 5 when a trigger switch 19 is turned on.
20 is a switch for turning on/off the modeling lamp 6; 21 is an external power supply device 1;
This is an external power supply housed within the 3. The control φ power supply device includes a power supply unit A, which also includes the aforementioned changeover switch 12, power switch 14, internal power supply 15, and switch 20, and a DC/D
The control section B includes a C converter 16 and a trigger switch 19.

Next, the operation will be explained. If the number of shots is small, the lighting time of the modeling lamp 60 will be short, so there is no need to install the external power supply 13, and in this case, the changeover switch 12 will have contact pieces a and b in a conductive state (see Figures 1 and 3). There is [there]

Therefore, when the switch 20 is turned on to adjust the shooting distance, etc., power is supplied to the modeling lamp pro from the internal power supply 15, and the lamp lights up while it is turned on. Thereafter, when the trigger switch 19 is turned on, the trigger circuit 18 operates to trigger the flash discharge tube 5, so that the flash discharge tube 5 emits flash light.

If a large number of images are to be photographed, the lighting time of the modeling lamp 6 becomes longer, so it is necessary to install an external power supply device 13. When the connection plug 13a of the external power supply device 13 is attached to the external power connector 11, the front surface of the connection plug 13a presses the power supply switching operation pin 9, so that the power supply switching operation pin 9 is pressed against the coil spring as shown in FIG. The contact pieces a and b of the changeover switch 12 move to the left against the biasing force of the switch 1o.
The conduction state of the contact pieces a and C is canceled and the contact pieces a and C are brought into a conduction state. When the external power supply device 13 is installed in this way, the contact pieces a and C become conductive, so when the switch 20 is turned on, the modeling rung 6 is connected to the external power supply 21.
Power is supplied from the controller, and the modeling lamp 6 is turned on. In this case, the internal power supply 15 is the flash discharge tube 5
used as a dedicated power source.

As mentioned above, when the number of shots is small.

Since the internal power supply 15 is used as a common power supply to supply power to the modeling lamp 6 and the flash discharge tube 5, portability and operability during photography (the modeling lamp 6 can be lit without carrying the external power supply 13) is achieved. If you want to take a large number of shots, you can install the external power supply 13 and connect the external power supply 21 to the modeling lamp 6.
Since the flash discharge tube 5 is supplied with power from the internal power source 15, it is difficult to ensure that the specified number of flashes can be emitted.

FIG. 5 shows another embodiment of the invention. The difference from the embodiment shown in FIG. 1 is that when an external power supply device 13 is installed, power is supplied to the flash discharge tube 5 from the external power supply 21, and power is supplied to the modeling lamp 6 from the internal power supply 15. be. With this configuration, the main capacitor 17 is charged by the large-capacity external power supply 21, which improves recycling time.
When it comes to excellent quick shooting, an ivy effect is added.

(Correspondence between the invention and the embodiments) In the embodiments of FIGS. 1 to 5, the flash discharge tube 5 and the control unit B
corresponds to the flashlight emitting device of the present invention, the external power connector 11 corresponds to an external power supply connection terminal, the changeover switch 12 corresponds to a switching means, and the power supply section A corresponds to a power supply device.

(Modified example) In the embodiment shown in FIGS. 1 to 5, when the external power supply device 13 is installed, the changeover switch 12 is switched in conjunction with it, but there is a configuration in which the changeover switch 12 can be switched manually. It may be configured.

Further, as shown in FIG. 6, a changeover interlocking switch 22 may be provided so that the external power source can be selected as a dedicated power source for either the flash discharge tube 5 or the modeling lamp 6. With this configuration, there is an advantage that the power source can be switched according to the purpose of use, such as when the number of images to be taken is extremely large or when it is desired to take images without impairing recycling time.

Furthermore, although the case has been described in which the modeling lamp 6 is disposed within one light emitter 3, the modeling lamp may be constructed as a separate item and can be attached to the light emitter 3. Further, although the control section 8 forming a part of the flash light emitting device is disposed within the power supply device, the device may be constructed by only the power supply section personnel.

(Effects of the Invention) As explained above, according to the present invention, an external power supply connection terminal to which an external power supply is connected, and either one of the flashlight emitting device and the modeling lamp are connected to the external power supply connection terminal, and at the same time, an internal Provided with a switching means for interrupting the power supply,
Therefore, when an external power source is connected, the external power source and internal power source can be switched as exclusive power sources for the flashlight emitting device and modeling lamp, respectively, so it can be used without sacrificing portability or operability. It is possible to make sure that the flash of light is emitted.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram showing an embodiment of the present invention, Fig. 2 is a perspective view showing the device of the present invention attached to a camera, and Fig. 3 is a cross section of the external power connector and connection plug shown in Fig. 2. 4 is a cross-sectional side view when installed, FIG. 245 is a circuit diagram showing another embodiment of the present invention, FIG. 6 is a circuit diagram showing a modification of the present invention, and FIG. 7 is a conventional device. FIG. 8 is a front view of the light emitting device shown in the seventh factor. ..., 3...light emitter, 5...flash 3
...External power supply device, 15...Internal power supply, 21...
External power supply. Figure 2

Claims (1)

[Claims] 1. In a flashlight emitting device and modeling lamp power supply device that is equipped with an internal power supply that supplies power to both the flashlight emitting device and the modeling lamp, an external power supply connection terminal to which an external power source is connected, and the flashlight emitting device and modeling lamp are connected. A power supply device for a flashlight emitting device and a modeling lamp, characterized in that a switching means is provided for connecting either one of the lamps to the external power supply connection terminal and simultaneously disconnecting the lamp from the internal power supply.