JPS58188047A - Discharge lamp sealing device - Google Patents

Abstract

PURPOSE:To secure sufficient strength of the captioned device against the oscillation and force applied externally by providing it with a metal cap, glass bottle body, collection disk, and a number of conductive foils. CONSTITUTION:An electrode 2 and a supporting conductive rod 3 can be supported firmly enough by a metal cap 4 and the supporting conductive rod 3 can be provided with vibration-damping properties against the oscillation and external force in its central axis direction. Besides, when the oscillation and external force perpendicularly to the central axis are applied, the oscillation and external force are diffused almost all over the external surface of the metal cap 4, since the stress is not applied directly to a glass bottle body 6 and the external surface of the metal cap 4 and the internal surface of a neck section 1A are not made to touch or press-contacted (weld or adhere to) each other. As a result, the vibration-damping properties of a sealed section can be improved and its failure can sharply be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a discharge lamp sealing device, and more particularly to a discharge lamp sealing device that can reinforce the strength against external vibrations and also realize cost reduction.

In discharge lamps that have a quartz glass envelope in which xenon, mercury, etc. are newly introduced at high pressure, the mechanical strength of the seal part is not sufficient, so the seal part may crack or break during transportation or use. There is a drawback that it is easy to do.

Because of C, various sealing devices with vibration-resistant structures that are resistant to external vibrations have been proposed for ICs as well.

FIGS. 1 and 2 are cross-sectional views showing a conventional discharge lamp sealing device intended for such a vibration-resistant structure.

In FIG. 1, reference numeral 1 denotes a glass enclosure in which a discharge lamp electrode 2 is housed, and also has a narrow cylindrical neck part IA;
16 is a columnar glass rod disposed inside the network ilA. The glass rod 16 has supporting blind holes 11 on its front and rear surfaces that are aligned with its central axis,
There are 12 holes in the hole.

14A and 14B are fixed to the front and rear end surfaces of the glass rod 16, and the blind hole 11 is fixed to the front and rear end surfaces of the glass rod 16.

A corrugated metal cap (molybdenum, tungsten, tantanol, etc.), 5, with a central hole drilled corresponding to 12, is placed along the curve of the glass rod 16, and its ends are led into metal caps 14A and 14B t* A continuous conductive foil (such as molybdenum).

Further, reference numeral 3 denotes a support conductive rod 7 which passes through the center hole of the metal cap 14A, press-fits its rear end into the support blind hole 11, and has the electrode 2 fixed to the front end thereof. teeth,
This is an external lead rod that passes through the center hole of the metal cap 14B and press-fits its end into the support blind hole 12.

In addition, in FIG. 1, the supporting conductive rod 3 and the metal cap 14A, and the external lead rod 7 and the metal cap 14A are shown.
B are fixed by welding or the like. Moreover, the glass rod l6, the conductive foil 5, and the neck part IA are
Heat and pressure sealed.

In the sealing device shown in Fig. Ml, the supporting conductive rod 3 and the external lead rod 7 are in the supporting blind hole 11 of the glass rod l6.

Since it is press-fitted into the metal cap 12 and fixedly attached to the metal cap 14A, the IC is considerably strengthened in its damage resistance against vibrations and external forces in the direction of the center axis force of the conductor extension 3 and the external lead 1117.

However, when vibration or external force is applied in a direction perpendicular to the central axis (j), stress is concentrated on the bottoms and openings of the blind holes 11 and 12, and there is a drawback that these parts are easily damaged.

As a sealing device for improving the above-mentioned drawbacks, a configuration as shown in FIG. 2 IC is conceivable. In the same figure, the first
The same reference numeral 4 as in the figure represents the same or equivalent part. 15 is a stem portion, for example, a metal cap 14A
The interior fζ of the neck part IA with a bending force of is formed by filling the same type of glass as that of the envelope 1.

In the case of FIG. 2, since the stem portion 15 is provided, as is clear, the vibration resistance against vibrations and external forces in a direction perpendicular to the central axis of the conductive rod 3 is greatly improved.

However, in this case 11. Since the length of the supporting conductive rod 3 interposed between the stem part 15 and the electrode 2 becomes shorter, when the electrode 2 is heated to a high temperature of 8t'I, the temperature of the stem part 15 rises, causing that part to become shorter. There is a risk that the constituent glass may devitrify and become weakened. As is well known, when glass devitrifies, its mechanical strength deteriorates significantly and its vibration resistance decreases.

Furthermore, in both cases of FIG. 1 and FIG. 2, the blind holes 11 and 12 must be precisely formed in the glass rod 16, which makes the processing troublesome, lowers the yield, and costs. There is a drawback that makes it A.

The present invention was developed in view of the above-mentioned circumstances, and its purpose is to have sufficient vibration resistance against vibrations and external forces in any direction, and to be able to withstand vibrations such as glass. An object of the present invention is to provide a discharge lamp sealing device that does not require precision machining.

In order to achieve the above object, in the present invention, the discharge lamp knob is disposed within the neck so that it has an outer shape that is the same as the internal cross-sectional shape of the neck, and opens toward the rear, On the central axis is a metal cap with a conductive rod for supporting the electrode fixed so as to extend forward.
From the opening of the metal cap, there is a glass reinforcement inserted into the mold, a current collecting disk disposed behind the glass tomb, and a current collecting disk disposed along the circumferential surface of the glass conductor, Both ends thereof are constituted by the metal cap and a plurality of conductive foils electrically connected to the current collecting disk tC.

Furthermore, in the present invention, the conductive rod for supporting the electrode is inserted into a hole provided in the center of the metal cap, which is disposed in front of the metal cap, according to necessity.
A reinforcing support disk whose peripheral edge is pressed against the inner surface of the neck portion is added.

The present invention will be described in detail below with reference to the drawings. Third
The figure is a cross-sectional view of one embodiment of the present invention.

In the figure, the same reference numerals as in FIGS. 1 and 2 represent the same or equivalent parts.

In FIG. 3, 61j is a glass extension disposed inside the neck part 1, and 4 is a glass extension 6 placed on the front side of the glass spring body 6, with its opening facing backward, and the glass extension 6 inserted into the opening. A rustled metal cap (tungsten,
molybdenum, tantalum, etc.).

Further, 9 is a current collecting disk placed behind the glass conductor 6. As clearly shown in the figure, the supporting conductive rod 3 and the external lead rod 7 are passed through holes provided in the centers of the metal cap 4 and the current collecting disk 9, respectively, and It is attached to the crotch.

IO is a concave groove formed around the bottom disk of the metal cap 4, and 8 is a recess formed when the neck IIIA is not pulled in at the pongee side end of the metal cap 4 during heat and pressure sealing. be.

In addition, as is clear from what will be described later, the indentation @
10 and the fourth part 8 are not necessarily necessary and can be omitted.

Embodiment #e in FIG.

11) Insert the rear end of the supporting conductive rod 3, to which the front end 1 electrode 2 is fixed, into the center hole of the bottom disk of the metal cap 4, and press Ili! It is fixed by contacting etc.

(2) so as to extend toward the opening 4 of the metal cap 4;
A plurality of strip-shaped conductive foils 5 are fixed to the outside, inside, or bottom of the metal cap 4 by welding or the like.

(3) A glass chain 6 made of the same type of quartz glass as the new body 1 is fully inserted from the open end side of the metal cap 4, so that the conductive foil 5 extends along the curve of the glass chain 6. Make a formatted array.

(4) The current collecting disk 9 with the external lead rod 7 inserted and fixed into its center hole is brought into contact with the back surface of the glass chain 6, and the conductive foil 5 is attached to one edge of the current collecting disk 9 by welding or the like. It's fixed.

(5) Spinning process (1) to (4) Consisting of I The assembly is inserted into the neck portion IA of the glass enclosure l and positioned.

(6) The assembly and the neck part IA are heated and pressurized from the outside, and the neck part IA, the conductive foil 5, and the glass continuous body 6 are integrated by bath bonding, and a heat-press seal is completed.

Since the present embodiment has the above-described configuration, the electrode 2 and the supporting conductive rod 3 can be supported sufficiently firmly by the metal cap 41ζ, and are able to withstand vibrations in the direction of the central axis of the supporting conductive rod 3 and external forces. In contrast, it is possible to provide vibration resistance equivalent to or better than that of the conventional technology.

In addition, even when vibration or external force is applied in a direction perpendicular to the central axis, direct stress is not applied to the glass chain 6 and the inner surface of the neck portion I roughly contacts the outer peripheral surface of the metal cap 4. Or, since it is in a press-welded (welded or unattached state), the stress caused by vibrations and external forces is dispersed over the entire surface of the outer peripheral surface of the metal cap 4. Therefore, the vibration resistance of the seal part is improved. and its damage is greatly reduced.

FIG. 4 is a sectional view of another embodiment of the present invention, in which the same reference numerals as in FIG. 3 represent the same or equivalent parts. As is clear from the comparison with FIG.
In the illustrated embodiment K, a reinforcing support disk 15A is further added.

The reinforcing support disks 15A penetrate through the supporting conductive rods 3 at their center holes and are fixed to each other 8t'I.
Its peripheral edge is in pressure contact with the inner surface of the neck section lm.

Therefore, according to this embodiment, the vibration resistance against vibrations and external forces in the direction perpendicular to the central axis of the supporting conductive rod 3 can be improved.
Needs improvement hh.

As is clear from the above description, according to the present invention, a discharge lamp sealing device having sufficient strength against externally applied vibrations and forces can be realized.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an example of a conventional discharge lamp sealing device.
FIG. 2 is a cross-sectional view showing another example of the conventional discharge lamp sealing device, FIG. 3 is a cross-sectional view of one embodiment of the present invention, and FIG. 4 is a cross-sectional view of another III embodiment of the present invention. . 1... Glass enclosure, IA... Cylindrical neck part, 2...
・Electrical discharge - 13... Conductive rod for support, 4... Metal cap, 5... Conductive foil, 6... Glass body, 7...
・External lead rod, 9... Current collecting disk, 15...
Patent attorney representing the stem department Michi Hiraki 1 non-human person has passed L 1 4E

Claims (1)

[Scope of Claims] (1) is a glass enclosure having a barrel-shaped neck portion; the neck portion has an outer shape that is the same as the internal cross-sectional shape; Place it in the department.
and a metal cap on which a conductive rod for supporting an electrode is fixed so as to extend forward, a glass chain inserted into the kneader from the open end side of the metal cap, and the glass chain. and a plurality of conductive foils disposed along the circumferential surface of the glass chain and having both ends conductively connected to the metal cap and the current collecting disk. . A discharge lamp sealing device, characterized in that the glass chain, the conductive foil, and the neck are welded together. (2) The patented discharge lamp sealing device is characterized in that a groove is formed on the outer peripheral surface of the metal cap. {3} The discharge lamp sealing device according to claim 1 or 2, characterized in that an external lead rod extending rearward is fixed to the disk for TEPCO. (4) Tubular neck. a glass enclosure having an outer shape that is approximately the same as the internal cross-sectional shape of the neck portion, and is disposed within the neck portion so as to open toward the rear, and a glass enclosure (for supporting one electrode) is disposed within the neck portion so as to open toward the rear. A metal cap to which a conductive rod is fixed so as to extend forward; a glass rod which is inserted into the metal cap from the open end side; and a current collector placed behind the glass rod. and a disk arranged along the circumferential surface of the glass chain 2!
A plurality of conductive foils each having both ends conductively connected to the metal cap and the current collecting disk are disposed in front of the metal cap, and the conductive rod for supporting the electrode is inserted and fixed in the center of the hole. 1. A discharge lamp sealing device comprising: a reinforcing support disk whose WR edge is pressed against the inner surface of the neck portion, and a glass plate, a conductive foil, and the neck portion are welded to each other. (5) A patented discharge lamp sealing device characterized in that the outer surface of the metal cap has a concave groove in the shape of e and is rough. (6) The discharge lamp sealing device according to claim 4 or @5, wherein an external lead rod extending rearward is fixed to the current collecting disk.