JP3431649B2 - Strobe light emitting unit and method of assembling the same - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates to relates to light-emitting unit and a method of assembling this miniature simplified flash device.

[0002]

2. Description of the Related Art A strobe device comprises a strobe light emitting portion for emitting strobe light toward a subject and a strobe driving circuit for driving the strobe light emitting portion. The strobe light emitting section is composed of an elongated glass discharge tube filled with Xe gas, an aluminum reflector for reflecting strobe light, and a diffuser plate provided in front of the reflector.

When the power of the strobe device is turned on, electricity is charged in the main capacitor and the trigger capacitor and applied to both electrodes of the discharge tube. When the sync switch of the strobe drive circuit is closed in synchronization with the opening of the shutter of the camera, a current flows through the trigger coil and the voltage is boosted to a very high voltage of several thousand volts to tens of thousands of volts. When this ultrahigh voltage is applied to the trigger electrode, the Xe gas is ionized, the resistance in the discharge tube is broken, and the electric charge accumulated in the main capacitor is discharged between the electrodes of the discharge tube.
As a result, flash light (strobe light) for several hundredths to several tens of thousands of seconds is emitted from the discharge tube.

In the light emitting portion of a small and simple strobe device mounted on a compact camera, a one-time-use camera or the like, the trigger electrode is an aluminum reflector, so that the discharge tube presses its outer peripheral surface against the reflector. Is fixed as. For this reason, by forming a pair of support portions for supporting the discharge tube on the diffuser plate that holds the reflector, and contacting both ends of the discharge tube with the pair of support portions, the outer peripheral surface of the discharge tube is formed. Is pressed against the inner wall surface on the back side of the reflector. In order to assemble such a stroboscopic light emitting portion, first, the reflector is clamped on the diffusing plate, and then the discharge tube is inserted into the through holes provided on both inner side walls of the reflector (Japanese Patent Laid-Open No. 3-290634). Issue).

[0005]

By the way, the pair of supporting portions formed on the diffusion plate has a diameter of a through hole formed in the reflecting umbrella because the discharge tube is pressed against the inner wall surface of the reflecting umbrella. It is projected in the direction of narrowing. Forcibly inserting the discharge tube into the through hole narrowed by the support part in this way adds extra force to the glass discharge tube,
It caused damage to the discharge tube. Further, because of this, the force applied to the discharge tube in the process of assembling the strobe light emitting unit becomes delicate, and it is difficult to automate the process of assembling the strobe light emitting unit.

[0006] The present invention has been made to solve the above problems, eliminating the need to add an extra force to the discharge tube, a flash emitter to allow automatic assembly of the flash emitter and its of It is intended to provide an assembling method.

[0007]

In order to solve the above-mentioned problems, the stroboscopic light emitting portion of the present invention comprises an elongated discharge tube that emits stroboscopic light, and the stroboscopic light emitted from this is reflected and emitted toward a subject. a reflector which is mounted so as to cover the the opening of the reflector, diffuse flash light, Te placed <br/> the strobe light emitting portion comprising a diffusion plate which transmits, back side on both sides of the reflector The discharge tube is formed on the wall
A through hole that is loosely inserted and is integrally provided on the diffuser plate to reflect
When attaching the umbrella to the diffuser, insert it into the through hole of the reflector in advance.
Support part that presses the discharged discharge tube against the inner wall surface of the reflector.
Material and the diffuser plate are integrally provided, and the reflector is used as the diffuser plate.
After assembling, place one end of the discharge tube in contact.
And a stopper member that regulates the discharge tube at a predetermined position on the reflector.
It is equipped with .

The method for assembling the strobe light emitting portion of the present invention is directed to an elongated discharge tube that emits strobe light, a reflector that reflects the strobe light emitted from the strobe light and emits the strobe light toward a subject, and the opening of the reflector. In a method of assembling a stroboscopic light emitting part, which is attached to the above so as to cover the stroboscopic light and diffuses and transmits the stroboscopic light, one end of the discharge tube is abutted against the stroboscopic light emitting part to set the discharge tube in the reflecting umbrella. A stopper member that defines the position is provided on the diffuser plate, the discharge tube is inserted into the through hole of the reflector , and then the reflector is assembled to the diffuser plate.Then , the end of the discharge tube is contacted with the stopper member of the diffuser plate. It is pushed in until the discharge tube is set to the predetermined position on the reflector.

[0009]

The discharge tube is inserted into the through hole provided in the reflector in advance without applying excessive force to the discharge tube. When the reflector with the discharge tube inserted in the through hole is attached to the diffuser plate, both ends of the discharge tube are supported by the pair of supporting parts provided on the diffuser plate, and the discharge tube is attached to the inner wall surface on the inner side of the reflector. Pressed. After that, the discharge tube is slightly slid in the axial direction and set in a predetermined position, whereby the assembly of the stroboscopic light emitting section is completed.

In FIG. 1, which is an exploded view of a strobe device embodying the present invention, a stroboscopic light emitting section 10 includes a discharge tube 12,
It is composed of a reflector 13 made of aluminum and a diffusion plate 14 made of transparent plastic. The reflector 13 is formed by bending a thin aluminum plate into a U shape and further bending an end portion thereof inwardly, and includes a U-shaped concave surface portion 15 and a pair of side surface portions 16a and 16b. . Then, this inner surface becomes a reflecting surface that reflects the strobe light. Side part 16
Through holes 18a and 18b having a diameter slightly larger than the outer diameter of the discharge tube 12 are formed in the a and 16b so that the discharge tube 12 can be easily inserted.

A pair of locking holes 21 are provided at both edges of the concave surface portion 15.
a and 21b are formed. The locking holes 21a, 21
b is a pair of locking claws 22 formed on both sides of the diffusion plate 14.
The reflector 13 is locked to the diffusion plate 14 by engaging with a and 22b. Further, the diffusion plate 14 is formed with four locking claws 23. The locking claws 23 fix the strobe light emitting unit 10 to the printed circuit board 24. Further, on the back surface side of the diffusion plate 14, as will be described later, a pair of supporting portions 14a and 14b for supporting both ends of the discharge tube 12 and one end of the discharge tube 12 are brought into contact with each other so that the discharge tube 12 can be secured. A stopper 14c which is positioned at a predetermined position is integrally formed with the diffusion plate 14 (see FIG. 4).

An electric contact piece 25 is connected to the outer wall of the reflector 13 and is connected to a trigger circuit mounted on the printed board 24 via a lead wire or a metal section (not shown). On the back surface of the printed circuit board 24, the main capacitor 27, the battery contact piece 2 that contacts the electrode of the battery
8. The electronic parts such as the synchro switch 29 which is short-circuited by the opening operation of the shutter blades are mounted. The lead terminals of these electric parts are soldered to the circuit pattern provided on the printed board 24, and the lead terminals of the discharge tube 12 are soldered to the circuit pattern through lead wires or metal sections (not shown). Is connected to the strobe circuit.

In order to assemble the stroboscopic light-emitting portion 10 of the stroboscopic device having the above-described structure, as shown in FIG. 2, first, the discharge tube 12 and the reflector 13 are attached to the jigs 3 respectively.
Set on 1,32. At this time, the positions of the jigs 31 and 32 are set so that one end of the discharge tube 12 and the through hole 18a of the reflector 13 face each other. Next, the discharge tube 12 is axially moved in the direction of arrow A shown in FIG. 3 to insert the discharge tube 12 into the through hole 18a. A table 32a is provided at the center of the upper portion of the jig 32 in correspondence with the height of the discharge tube 12, and supports the discharge tube 12 from below, so that the discharge tube 12 inserted from the through hole 18a is straight. It is moved toward the through hole 18b. When the tip of the discharge tube 12 projects from the through hole 18b, the insertion operation is stopped before the predetermined set position.

Next, as shown in FIG. 4, the reflector 13 is inserted between the supporting portions 14a and 14b on the diffusion plate 14 which is placed on the jig 33 with the outer wall surface facing downward. To
It is lowered vertically (direction of arrow B) from above. Discharge tube 12
When both ends of the discharge tube 12 come into contact with the support portions 14a and 14b, the discharge tubes 12 are pushed upward by the support portions 14a and 14b, and the outer peripheral surface of the discharge tube 12 is pressed against the inner wall surface of the reflector 13.

At the same time, the locking claw 22a is engaged with the locking hole 21a.
And the reflector 13 is locked to the diffuser plate 14. After that, when the discharge tube 12 is pushed in the direction of arrow C and the tip of the discharge tube 12 is brought into contact with the stopper 14c, the discharge tube 12 is at a predetermined position of the reflector 13, that is, the discharge tube 1 with the largest amount of emitted light.
The central part of 2 is set to the center of the width direction of the reflective umbrella 13,
The assembly of the strobe light emitting unit 10 is completed.

[0016]

Embodiment As described above, the discharge tube 12 and the reflector 1
3, the mounting of the diffuser plate 14 on the jig and the assembling operation shown by the arrows A, B, and C are all extremely simple steps, so the assembly of the strobe light emitting unit 10 is automated by an industrial robot or the like. It's very easy. In the assembly of the stroboscopic light emission part used for a single-use camera, the insertion force when inserting the discharge tube after the reflector and the diffuser plate are clamped in the past was about 350 gf on average. The average was about 150 gf.

[0017]

Effect of the Invention] As described above in detail, according <br/> to the onset bright, discharge by one end of the discharge tube is in contact
Stopper member that defines the setting position of the tube reflector
On the diffuser plate and insert the discharge tube into the through hole of the reflector.
The reflector to the diffuser plate and the discharge tube at the end of the diffuser plate.
I pushed it in until it came in contact with the stopper member
The discharge tube at a certain position of the reflector, for example
Set the center of many discharge tubes in the widthwise center of the reflector.
Wear. Further , since it is not necessary to apply an extra force to the discharge tube when assembling the strobe light emitting section, the discharge tube is not damaged. As a result, the process of assembling the strobe light emitting unit can be easily automated.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a strobe device.

FIG. 2 is an explanatory view showing a state in which a discharge tube and a reflector are placed on respective jigs.

FIG. 3 is an explanatory view showing a state in which a discharge tube is inserted into a through hole of a reflector.

FIG. 4 is an explanatory diagram showing a state in which a reflector is attached to a diffusion plate.

[Explanation of symbols]

10 Strobe emission part 12 discharge tubes 13 reflective umbrella 14 Diffuser 14a, 14b Supports 14c stopper 18a, 18b through hole

Claims (2)

(57) [Claims] 1. An elongated discharge tube for emitting strobe light,
A reflector that emits toward an object to reflect therefrom the emitted flash light, mounted so as to cover the the opening of the reflector, the flash emitter consisting of a strobe light diffusion, a diffusion plate for transmitting loose insertion Oite, wherein formed on the inner side both side walls of the reflector, the discharge tube
The through-hole and
When assembled on the diffuser plate, it is inserted through the through hole of the reflector in advance.
Member that presses the existing discharge tube against the inner wall surface of the reflector
And the reflector is installed integrally with the diffuser plate and assembled to the diffuser plate.
After making sure that one end of the discharge tube
With a stopper member that defines the discharge tube at a predetermined position on the reflector.
The strobe light emitting section is provided. 2. An elongated discharge tube that emits strobe light,
A stroboscopic light emitting unit including a reflecting umbrella that reflects the strobe light emitted from this and emits the strobe light toward a subject, and a diffuser plate that is attached to the opening of the reflecting umbrella to cover the strobe light and diffuses and transmits the strobe light. In the assembling method, the stopper member for defining the setting position of the reflector of the discharge tube by contacting one end of the discharge tube is provided on the diffusion plate, and the discharge tube is inserted into the through hole of the reflector. From the above , the reflection umbrella is assembled to the diffuser plate, and then the discharge tube is pushed until its end contacts the stopper member of the diffuser plate, and the discharge tube is set at a predetermined position of the reflector. How to assemble the strobe flash unit.