JPH056755A - Single-end double lamp - Google Patents

Abstract

PURPOSE:To provide a single-end double lamp capable or at once two desires of making the lamp compact and uniforming a spherical part surface temperature. CONSTITUTION:An internal sealed body 1a forming the inner pipe 1 of a single- end double lamp A is of a double-end type having pinch seal parts 2 on both ends. The shaft parts 4 of electrodes 6 are embedded in their base end parts into the pinch seal parts 2 of the internal seal body 1a, respectively, and disposed in parallel to each other and also in such a manner that the line mutually connecting the discharge parts F on the tops of the shaft parts 4 crosses the shaft parts 4. An outer pipe 1 of a single-end type having the pinch seal part 2 on one end is provided with the inner pipe 1 therein, and connects the embedded ends of external lead bars 13, 13 embedded in the pinch seal part 12 of the external pipe 11 to the embedded ends of the electrodes 6, 6 embedded in the pinch seal parts 2, 2, of the inner sealed body 1a through intermediate lead bars 14, 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel structure in a single-ended double lamp.

[0002]

2. Description of the Related Art First of all, incandescent light bulbs, particularly metal halide lamps, are required to have characteristics as a point light source, and therefore, there is a demand to shorten the entire length as much as possible to make it into a compound. Secondly, by making the surface temperature of the spherical part of the inner envelope as uniform as possible, the distribution of the gas component filled in the inner envelope is made as uniform as possible, and the variation in emission color is desired to be minimized. There is.

Therefore, a conventional single-ended double lamp as shown in FIGS. 2 and 3 has been proposed. That is, in FIG. 2, the inner pipe (1 ') is a double end type and the outer pipe (11') is a single end type. The inner tube (1B ') used for the double lamp (B) is of double-end type, with pinch seals (2') (2 ') on both sides.
Since this pinch seal part (2 ') (2') acts as a so-called heat sink, heat is taken from both sides of the spherical part (3 '), and the surface temperature of the spherical part (3') is made uniform to some extent. However, since the counter electrodes (6 ') and (6') are arranged on a straight line, the discharge part interval at the tip of the counter electrodes (6 ') and (6')
(Sb) and the pinch seal parts (2 ′) and (2 ′) are added to the length of the entire shape of the inner pipe (3b ′), which has a disadvantage of increasing the total length.

On the other hand, the double lamp (C) of FIG. 3 is of a single-end type both inside and outside, and a double-end type inner tube (3c ') is vertically arranged, and electrodes are vertically positioned. Here is an example. In this case, the inner tube (3c ') is provided with only one pinch seal part (2'), and the two electrodes (6 ') (6') are parallel from this pinch seal part (2 '). The electrode (6 ') (6') tip discharge line (F ') (F')
(L ') is designed to go directly to the electrodes (6') (6 ').

Therefore, the inner tube (3) of the double lamp (C) of FIG.
The total length of c ') is the sum of the spherical part (3') and one pinch seal part (2 '), and the pinch seal parts (2') (2 ') are symmetrical on both sides of the spherical part (3'). Also, both electrodes (6 ') (6') are arranged on a straight line, and the distance between discharge parts (Sc) between the electrodes (6 ') (6') is added to the total length of the double end type internal The outer tube (11 ') has a vacuum inside, although the whole can be made very compact compared to the double lamp (B) using the tube (3B').
Although it is a double-tube type housed in, there is only one pinch seal part (2 ') that draws heat from the spherical part (3'), so heat is taken away near the pinch seal part (2 '). The temperature becomes low, and heat is not taken away at the position opposite to the pinch seal part (2 ') of the spherical part (3'), so it becomes high temperature, and the surface temperature of the entire spherical part (3 ') varies. There is a drawback in that it is not possible to suppress the decrease in luminous efficiency and the occurrence of color variations.

[0006]

DISCLOSURE OF THE INVENTION The present invention meets the above-mentioned two demands for compactness and uniform surface temperature of the spherical portion.
The problem to be solved is the development of a metal vapor discharge lamp that can be achieved every time.

[0007]

In order to achieve the above-mentioned object, a single-ended double lamp (A) of the present invention has a double-end type internal encapsulating body (1a) having pinch seal portions (2) at both ends. ), And the base end portion thereof is embedded in the pinch seal portion (2) of the inner sealing body (1a), and the shaft portion (4) extended from the pinch seal portion (2) is arranged in parallel, An inner tube composed of electrodes (6) and (6) arranged so that the straight line (L) connecting the discharge part (F) at the tip of the shaft part (4) intersects the shaft part (4). (1) and the inner pipe (1), and a single end type outer pipe (11) having a pinch seal part (2) at one end
And the embedded end of the external lead rod (13) (13) embedded in the pinch seal part (12) of the outer tube (11) and the electrode (2) (2) of the pinch seal part (2) (2) of the inner sealing body (1a). 6) It is characterized in that it is composed of the intermediate lead rods (14) and (14) that connect the buried end of (6).

As a result, the entire length of the inner tube (1) was made uniform and the variation in the emission color due to the equalization of the surface temperature of the spherical portion (3) of the inner tube (1) could be prevented.

According to claim 2, the intermediate lead rod
The (14) is inserted through the ceramic pipe (15), whereby the photoeletron effect can be prevented and the life of the inner pipe (1) can be extended.

[0010]

The present invention will be described below with reference to the illustrated embodiments. (1) is an internal tube, an internal sealing body (1a), and a pair of electrodes (6)
It is composed of (6) and. The inner sealing body (1a) is made of quartz glass, has pinch seal portions (2) formed on both sides, and has a spherical portion (3) at the center thereof.

The electrode (6) is composed of a shaft portion (4) and a winding portion (5), the base end portion of which is the pinch seal portions (2) and (2) of the inner sealing body (1a). Each of them is buried, and the base end portion is connected to the molybdenum metal foil (7) at the pinch seal portion (2). Electrodes (6) extended from the pinch seal part (2)
The shafts (4) are arranged parallel to each other, and the winding part (5) at the tip of the shaft (4) is projected almost at right angles to the shaft (4) (of course, winding The projecting directions of the line portions (5) are not limited to being substantially perpendicular to the shaft portion (4).), And they are arranged so as to face each other at the central portion of the spherical portion (3).

The spherical portion (3) is filled with various kinds of halogen gas, rare gas and other components according to the kind of the incandescent lamp, if necessary.

Reference numeral (11) is a single-end type outer tube having a pinch seal portion at one end, and the inner tube (1) is incorporated therein. Molybdenum metal foil (16) (16) is embedded in the pinch seal part (12) of the outer tube (11), and
3) and 13 are welded to the molybdenum metal foils 16 and 16, respectively, and led out to the outside. The intermediate lead rods (14) and (14) welded to the molybdenum metal foil (7) of the pinch seal part (2) of the inner tube (1) and derived therefrom are the outer tube (11).
Molybdenum metal foil (1
It is welded to 6) and supports the inner tube (1).

The long intermediate lead rod (14) which is led out from the upper pinch seal portion (2) of the inner pipe (1) and passes near the spherical portion (3) which is the light emitting portion is connected to the ceramic pipe (15). It is inserted and serves to prevent the photoeletron effect of the intermediate lead (14). As a result, the life of the inner pipe (1) can be extended.

The inside of the outer tube (11) is usually kept in vacuum, but neon gas or other necessary gas may be filled if necessary, for example, to prevent neon loss.

Double lamp (A) thus formed
Is used, for example, by being adhered to an Edison base die or a ceramic die, or by inserting the external lead rod (13) into an insulator outlet as it is.

[0017]

As described above, the single end 2 of the present invention
In heavy lamps, a double-end type internal encapsulation with pinch seals on both ends, and a base part that is embedded in the pinch seals of the internal encapsulation and extends from the pinch seals. Are arranged in parallel with each other, and an internal tube composed of an electrode arranged so that a straight line connecting the discharge part at the tip of the shaft part intersects with the shaft part; A single-end type external pipe having a pinch seal part on the inside, and an intermediate lead rod connecting the embedded end of the external lead rod embedded in the pinch seal part of the external pipe and the embedded end of the electrode of the pinch seal part of the inner envelope. Since it is composed of and, it is possible to shorten the length of the inner tube as a whole, which in turn shortens the overall length of the single-ended double lamp, and, in addition, the heat sink by the pinch seals on both sides of the sphere. It could prevent the emission color variation due to equalization of the surface temperature of the spherical portion of the inner tube by fruit.

Further, since the intermediate lead rod for connecting the embedded end of the external lead rod embedded in the pinch seal portion of the external pipe and the embedded end of the electrode of the pinch seal portion of the inner seal body is inserted into the ceramic pipe. , The photoeletron effect can be prevented and the life of the inner tube can be extended.

[Brief description of drawings]

FIG. 1 is a sectional view of the present invention.

FIG. 2 is a sectional view of a conventional example.

FIG. 3 is a sectional view of another conventional example.

[Explanation of symbols]

(1)… Internal tube (1a)… Internal enclosure (2)… Pinch seal part (3)… Sphere part (4)… Shaft (5)… Winding (6) ... Electrode (7) ... Molybdenum metal foil (11)… External pipe (12)… Pinch seal part (13) ... Intermediate lead rod

Claims (2)

[Claims] 1. A double-end type inner sealing body having pinch seal portions at both ends, and a base end portion thereof embedded in each pinch seal portion of the inner sealing body, and a shaft portion extending from the pinch seal portion is parallel. And an internal tube composed of an electrode arranged so that a straight line connecting the discharge section at the tip of the shaft section intersects the shaft section, and the internal tube is built-in, and a pinch is provided at one end. A single-ended type outer pipe having a seal portion, and an intermediate lead rod connecting the embedded end of the external lead rod embedded in the pinch seal portion of the external pipe and the embedded end of the electrode of the pinch seal portion of the inner seal body. A configured single-ended dual lamp. 2. The single-ended double lamp according to claim 1, wherein the intermediate lead rod is inserted through a ceramic pipe.