JPH0831379A - Discharge lamp - Google Patents

Abstract

(57) [Summary] [Purpose] The assembly process is simplified. A metal clip 5 is fixed to an insulating holder 2, the arc tube 1 is held by the holder 2, and a metal flange 4 is attached to the metal clip 5, and the metal flange 4 and the arc tube 1 are opposed to each other. After deciding the position, soldering, welding, etc. 6
Fixed by. As a result, when the metal flange 4 is fixed to the metal clip 5, it is not necessary to hold the holder 2 and the metal flange 4, and the metal flange 4 can be easily fixed. Therefore, the assembling process can be simplified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge lamp used for a vehicle lamp such as a vehicle headlamp or a vehicle auxiliary headlamp, and particularly, a discharge lamp capable of simplifying an assembling process. It is about.

[0002]

2. Description of the Related Art A discharge lamp of this kind generally comprises an arc tube,
An insulating holder that holds the rear of the arc tube at the front,
The holder is provided with a metal flange which is fixed with an adhesive after the relative position to the arc tube is determined. This discharge lamp has advantages such as low power consumption and high brightness, and is used for vehicle lamps such as vehicle headlamps and vehicle auxiliary headlamps.

[0003]

However, in the above discharge lamp, when the metal flange is fixed to the insulating holder by the adhesive, the holder and the flange are held until the adhesive is solidified. However, the assembly process is complicated because it takes some time for the adhesive to solidify.

An object of the present invention is to provide a discharge lamp capable of simplifying the assembling process.

[0005]

According to the present invention, a metal clip is fixed to an insulating holder, an arc tube is held by the holder, and a metal flange is provided on the metal clip, and the metal flange and the arc tube are provided. It is characterized in that the relative position of is determined and then fixed.

[0006]

According to the present invention, the metal flange is fixed to the metal clip and the metal flange is fixed to the holder through the metal clip with the above-described structure. Therefore, when the metal flange is fixed to the metal clip. The holder and the metal flange need not be held by welding, soldering or the like, and can be easily fixed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the discharge lamp of the present invention will be described below with reference to the accompanying drawings. In the figure, 2 is a holder.
As shown in FIG. 4, the holder 2 is made of, for example, ceramic (or insulating material such as resin). This holder 2
Has a rectangular cross section and satisfies the H3 bulb standard. A rectangular locking projection 26 is integrally provided on the front surface of the holder 2 at approximately the center of both front and back surfaces (surfaces on the long side) of the front portion of the holder 2. In addition, storage grooves 20 and 21 are provided alternately on the front and back surfaces of the rear portion of the holder 2 one by one from the rear surface of the holder 2. In the figure, 5 is a metal clip. As shown in FIG. 4, the metal clip 5 is formed by bending a thin steel plate having conductivity and elasticity, and has an intermediate piece 51 whose center is curved downward, and both sides of the intermediate piece 51 are substantially downward. Elastic clamping pieces 52, 52 bent at right angles
A locking groove 50 provided substantially in the center of the intermediate piece 51 and the elastic sandwiching pieces 52, 52, and the elastic sandwiching piece 5
A part of 2, 52 is composed of locking claws 53, 53 which are bent substantially horizontally outward. The lower edges of the elastic holding pieces 52, 52 of the metal clip 5 are separated from the storage grooves 20, 21 of the holder 2. The elastic clamping pieces 52, 52 of the metal clip 5 elastically clamp the front and back surfaces of the holder 2, and the edge of the locking groove 50 of the metal clip 5 and the locking claw 5 are held.
3 are respectively locked to the three side surfaces of the locking projection 26 of the holder 2, and as a result, the metal clip 5 is fixed to the front side of the holder 2 (see FIG. 5). At this time, since the elastic clamping pieces 52 of the metal clip 5 elastically clamp the front and back surfaces of the holder 2, there is no rattling or looseness between the metal clip 5 and the holder 2. Also, a metal clip 5 is attached to the holder 2.
The gap between the holder 2 and the metal clip 5 generated in the state where they are assembled and fixed may be filled with a filling adhesive such as cement.

In the figure, 1 is an arc tube. As shown in FIG. 5, this arc tube 1 is made of, for example, a quartz glass tube, and is composed of a hermetically sealed glass sphere 10 that constitutes a central discharge space, and pinch seal portions 11 at both ends of the hermetically sealed glass sphere 10. A rare gas for starting such as xenon and a halide of a luminescent metal such as mercury, sodium and scandium are enclosed in the sealed glass bulb 10. Two electrodes 12 and 13 made of, for example, tungsten are arranged facing each other from the inside of the closed glass bulb 10 to the pinch seal portions 11 at both ends thereof. These two electrodes 12 and 13
The two lead wires 14 are connected to each other via the molybdenum foil 18.
And 15 are connected to each other, and the two lead wires 14 and 15 are extended from the pinch seal portion 11 to the outside. An electrically conductive lead support (power supply wire) 16 is connected to the one lead wire 14 (on the front side of the arc tube 1).
An insulating cylindrical body 17 made of, for example, ceramic is externally fitted to the unit 6. In the present specification, the lead support 16
Is called a lead wire. Further, in the above-described arc tube 1, the two electrodes 12 and 13 are connected to the lead wires 14 and 15 via the molybdenum foil 18 and extend to the outside of the pinch seal portion 11. May directly extend to the outside of the pinch seal portion 11.

The rear portion of the arc tube 1 is assembled and held on the front portion of the holder 2 (see FIG. 6). That is, the pinch seal portion 11 and the lead wire 15 of the arc tube 1 are fitted in the fitting holes 22 and 23 provided between the center front surface of the holder 2 and the storage groove 20, respectively, and Semi-circular recess 2 provided between the front surface of the side of the holder 2 and the storage groove 21.
The insulating tubular body 17 of the arc tube 1 is fitted and fitted into the fitting 4 and the fitting hole 25. The two storage grooves 20 and 21 of the holder 2 accommodate the two leaks of the arc tube 1 and the tips of the wires 15 and 16 (lead support), respectively.

In the figure, 4 is a metal flange. The flange 4 is brought into contact with the peripheral portion of the bulb insertion hole of a reflector (reflecting surface) -integrated lamp housing of a vehicle lamp such as a vehicle headlamp or a vehicle auxiliary headlamp, or the arc tube. It serves as a reference for the positioning of No. 1 in the front-back direction. As shown in FIG. 6, the metal flange 4 is formed by punching and bending a thin steel plate having conductivity and elasticity, and has a thin hollow cylindrical flange portion having an upper surface closed and a lower surface opened. 40
A rectangular through hole 41 provided substantially in the center of the flange portion 40, fixing portions 42 and 42 formed by bending the long sides of the through hole 41 upward at substantially right angles, and the flange portion 40. The projection 43 is provided and contacts the peripheral edge of the valve insertion hole for positioning. The metal flange 4 is provided with the holder 2 and the metal clip 5 through the through hole 41.
By externally fitting the metal flange 4 in the direction of the arrow in FIG. 7, predetermined positions of the metal flange 4 and the arc tube 3 in the front-rear direction are determined. After this position is determined, the solid parts 42, 4 of the metal flange 4 are
2 and the elastic holding pieces 52, 52 of the metal clip 5 are fixed by soldering or welding. At this time, since the metal flange 4 and the metal clip 5 are fixed by soldering, welding 6 or the like, compared with the conventional discharge lamp in which the holder and the metal flange need to be held until the adhesive solidifies. As a result, the time for assembling the discharge lamp can be shortened, and the work for assembling the discharge lamp can be simplified.

In the figure, 3 is a cord for high voltage. The cord 3 includes a wire (core wire) 30 and an insulating coating 31 covering the wire 30. One ends of the two cords 3 are housed in the housing grooves 20 and 21 of the holder 2, respectively, and the wires 30 of the two cords 3 and the two lead wires 15 and 1 of the arc tube 1 are accommodated.
6 (lead support) is connected by solder or the like (not shown). The two lead wires 3 are connected to a high voltage generating circuit (not shown) via a connector (not shown).

In the discharge lamp of the present invention in this embodiment, the metal clip 5 is fixed to the insulating holder 2, the arc tube 1 is held in the holder 2, and the metal clip 5 is provided with the metal flange 4. Metal flange 4 and the arc tube 1
Since it is fixed by soldering or welding 6 after determining the relative position to the metal flange 4, the metal flange 4
It is not necessary to hold the holder 2 and the metal flange 4 at the time of fixing to, and they can be easily fixed. As a result,
The assembling process can be simplified.

In particular, in this embodiment, since the lower edges of the elastic holding pieces 52, 52 of the metal clip 5 are separated from the receiving grooves 20, 21 of the holder 2, the metal clip 5 has two arc tubes 1. The lead wires 15 and 16 and the wire 30 of the two cords 3 are connected to each other and apart from the high-voltage connection, and there is no risk of high-voltage leakage when a high voltage is applied.

Further, in this embodiment, the two lead wires 15 and 16 and 2 of the arc tube 1 are provided at the rear portion of the holder 2.
Since the connection portion of the cord 3 of the cord 3 with the wire 30 is provided with two accommodating grooves 20 and 21 respectively accommodated separately, the two lead wires 15 and 16 from the arc tube 1 and two Since a part of the insulating holder 2 is interposed as a partition wall between the connection portion of the cord 3 with the wire 30, the high voltage leak can be reliably prevented. Moreover, 2
Since one storage groove 20 and one storage groove 21 are provided on each of the front and back surfaces of the holder 2, the effect of preventing the above-mentioned high voltage leakage is further enhanced. In addition, in this embodiment, the rear portion of the holder 2 has a rectangular cross section,
Since the H3 bulb standard is satisfied, the discharge lamp can be configured within the H3 bulb standard.

[0015]

As is apparent from the above, the discharge lamp of the present invention can simplify the assembly process.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a discharge lamp of the present invention.

FIG. 2 is also a partial vertical cross-sectional view of the discharge lamp of the present invention.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a perspective view showing a state in which a metal clip is attached to a holder.

FIG. 5 is a perspective view showing a state in which an arc tube is attached to a holder.

FIG. 6 is a perspective view showing a state where a metal flange is attached to a holder.

FIG. 7 is a perspective view of a discharge lamp of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Arc tube, 15 ... Lead wire, 16 ... Lead support (lead wire), 2 ... Holder, 20 and 21 ... Storage groove, 26 ... Locking convex part, 3 ... Cord, 30 ... Wire, 4 ...
Metal flange, 42 ... Fixed part, 5 ... Metal clip, 50
... locking groove, 52 ... elastic holding piece, 53 ... locking claw, 6 ... solder, welding, etc.

Claims (1)

[Claims] 1. An insulating holder, a metal clip fixed to the holder, an arc tube held by the holder, and a metal flange fixed to the metal clip after determining a relative position of the arc tube, Discharge lamp characterized by having.