JPH08297312A - Illuminator - Google Patents

Abstract

PURPOSE: To facilitate assembling with a simple configuration by mounting a reflection plate having a contact elastically abutting on the outer periphery of a tube body of an Xe tube and plate-like terminals for holding electrodes on both ends of the tube body on a base plate respectively and connecting the reflection plate and the plate-like terminals. CONSTITUTION: The reflection plate 3 as a trigger means is mounted on the base plate 11 in such a manner that an opening surface is located on the side opposite to the base plate 11 and the contact 12 which is notched in a direction perpendicular to the axial direction and connected to the reflection plate 3 on one end and has elasticity is formed to project inside the reflection plate 3, at a nearly central position in the axial direction of the reflection plate 3. The plate-like terminals 13 for holding the electrodes 2 on both ends of the Xe tube 1 are mounted on the base plate 11 in the vicinities of both ends of the reflection plate 3. When the electrodes 2 on both ends of the Xe tube 1 are fitted and set in hook-like notches 13a formed in the plate- like terminals 13 respectively, at the time of assembling, the Xe tube 1 is elastically pressed by the contact 12 formed on the reflection plate 3 and the electrodes 2 are brought into press-contact with the notches 13a, to fix the electrodes 2 and the plate- like terminals 13 by soldering.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an illuminating device used for a flash light source of a camera, for example, and more particularly to an illuminating device for flash light emission using a xenon (Xe) tube as a light emitting source.

[0002]

2. Description of the Related Art FIGS. 5 and 6 show an example of the configuration of a conventional illumination device of this type. The Xe tube 1 is provided with electrodes 2 at both ends of a hermetically sealed glass tube, and the outer circumference of the glass tube is coated with a conductive film. The Xe tube 1 is filled with a gas that emits light by electric discharge, for example, xenon gas.

On the outer periphery of the Xe tube 1, there is arranged a conductive reflecting plate 3 formed of an aluminum plate or the like in a parabolic shape whose cross section has the Xe tube 1 as a central axis, and the inner surface of the reflecting plate 3 is mirror-finished. Has been done. Both ends of the Xe tube 1 project from both end surfaces of the reflection plate 3, and holes 4a formed at both ends of the rubber plate 4 are inserted into both ends of the Xe tube 1. Rubber plate 4
Is in contact with the outer peripheral surface of the reflection plate 3 in the longitudinal direction, and Xe
The tube 1 is pressed against the inner surface of the reflection plate 3 by the urging force of the rubber plate 4.

A copper foil 5 is adhered to the outer surface of the reflector 3, a lead wire 6 is connected to the copper foil 5 by soldering, and the reflector 3 serves as a trigger terminal. Also,
Lead wires 7 are respectively connected to the pair of electrodes 2 by soldering, and a flash light is generated in the Xe tube 1 by applying a voltage between the lead wires 6 and 7.

[0005]

However, according to the conventional lighting device configured as described above, the rubber plate 4 must be used as a separate component in order to press the Xe tube 1 against the reflection plate 3. However, there was a drawback that the number of parts increased. In addition, the lead wires 6 and 7 have to be soldered to the electrode 2 and the reflection plate 3 that is the trigger terminal, respectively, which is a problem in that it takes time to assemble.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an illumination device for flash light emission which has a simple structure and is easy to assemble.

[0007]

In order to achieve the above object, the present invention has a gas which has electrodes (for example, the electrode 2 in FIG. 1) at both ends and which emits flash light by the discharge between the electrodes at both ends. For example, a light emitting means (for example, the Xe tube 1 in FIG. 1) filled with xenon gas and a trigger means (for example, the reflection plate 3 in FIG. 1) for outputting a trigger signal for supporting the start of light emission to the light emitting means are provided. In the illuminating device which has, holding means (for example, flat plate terminal 13 in FIG. 1) mounted on a board (for example, board 11 in FIG. 1) for holding the electrodes at both ends, and urging for urging the light emitting means toward the holding means. Means (eg, contact 12 of FIG. 1).

[0008]

In the illuminating device having the above structure, the contacts of the trigger means mounted on the substrate elastically contact the light emitting means, and the electrodes on both ends of the light emitting means are held by the holding means mounted on the substrate. By using a wiring pattern formed on the substrate, a voltage can be applied between the trigger means and the holding means to generate a flash light in the light emitting means without using a lead wire.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the illumination device of the present invention will be described below with reference to the drawings.

1 and 2 show the configuration of an embodiment of the present invention. In these figures, parts corresponding to those of the conventional example shown in FIGS. 5 and 6 are denoted by the same reference numerals, and description thereof will be omitted as appropriate. In FIGS. 1 and 2, a circuit (not shown) for causing the lighting device to emit light is formed on the glass epoxy substrate 11. The reflection plate 3 having a substantially parabolic cross section, which is a trigger means, is mounted at a predetermined position on the substrate 11 with the opening surface opposite to the substrate 11. Also,
An elastic contact 12, which is notched in a direction perpendicular to the axial direction and has one end connected to the reflective plate 3 at a position approximately at the center of the reflective plate 3 in the axial direction, protrudes inside the reflective plate 3. Is formed.

Plate terminals 13 for holding the electrodes 2 at both ends of the Xe tube 1 are mounted at predetermined positions on the substrate 11 near both ends in the axial direction of the reflector plate 3. The flat plate terminal 13 is formed with a key-like cut 13a, and the electrode 2
Is fitted and held in the notch 13a.

Next, a procedure for assembling the lighting device according to this embodiment will be described. First, the electrodes 2 at both ends of the Xe tube 1 are fitted into the notches 13a of the flat plate terminal 13 and set. In this state, the Xe tube 1 is elastically pressed by the contact points 12 formed on the reflection plate 3, and the electrode 2 becomes flat.
It is pressed against the notch 13a and temporarily fixed. Next, the electrode 2 and the flat plate terminal 13 are soldered to be completely fixed.

In the lighting device thus assembled, a voltage is applied to a predetermined position of a circuit mounted on the substrate 11 so that the conductive film formed on the outer periphery of the Xe tube 1 and the electrode 2 are separated from each other. Discharge occurs, the xenon gas emits light, and flashes.

According to this embodiment, the reflector 11 serving as a trigger terminal and the flat plate terminal 13 holding the electrode 2 are mounted on the substrate 11 on which the circuit for making the lighting device emit light is formed, and the reflector is provided. Since the electrodes 12 at both ends of the Xe tube 1 are pressed into contact with the flat plate terminals 13 by the contact points 12 formed in 3, the lead plate connected to the reflection plate 3 and the electrodes 2 is unnecessary, and the assembly time can be shortened. The number of parts can be reduced.

In the above embodiment, one contact 12 is formed at the center of the reflector 3 at right angles to the axial direction.
As shown in FIG.
Individual pieces may be provided. By doing this, the Xe tube 1
Can be pressed evenly to the left and right, and the electrode 2 can be reliably pressed against the flat plate terminal 13. In addition, if the contacts 12 are plural, even if one contact is disconnected, the Xe tube 1
Can be triggered. Therefore, the Xe tube 1 can reliably emit light.

[0016]

As described above, according to the illuminating device of the present invention, the trigger means having a contact elastically abutting the outer circumference of the tubular body, which is the light emitting means, and the electrodes at both ends of the tubular body are held. Since the holding means is mounted on the board and electrically connected to each other, the lead wire connected to the trigger means and the electrode can be eliminated, and the assembly time and the number of parts can be reduced. You can

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a schematic configuration of an embodiment of a lighting device of the present invention.

FIG. 2 is a side view showing the shape of the reflection plate of FIG.

FIG. 3 is an explanatory diagram showing a schematic configuration of another embodiment of the present invention.

FIG. 4 is a side view showing the shape of the reflection plate of FIG.

FIG. 5 is a rear perspective view showing the configuration of an example of a conventional lighting device.

FIG. 6 is a top view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Xe tube (light emitting means) 2 Electrode 3 Reflector (trigger means) 11 Substrate 12 Contact (biasing means) 13 Flat plate terminal (holding means) 13a Notch

Claims (5)

[Claims] 1. A light emitting means having electrodes at both ends and filled with a gas that emits flash light by discharge between the electrodes at both ends; and a trigger for outputting a trigger signal for supporting the start of light emission to the light emitting means. An illuminating device having a means, comprising: holding means mounted on a substrate for holding the electrodes at both ends, and urging means for urging the light emitting means toward the holding means. 2. The lighting device according to claim 1, wherein the holding means is a conductive flat plate terminal having a hook-shaped cut. 3. The lighting device according to claim 1, wherein the trigger means and the biasing means are integrally formed. 4. A reflection means for reflecting the light emitted from the light emitting means in a predetermined direction is further provided, and the biasing means is integrally formed by cutting out a part of the reflection means. The lighting device according to claim 1. 5. The lighting device according to claim 1, wherein there are a plurality of the biasing means.