JP3167355B2 - Single-ended double lamp - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Incandescent lamps, in particular, metal halide lamps, firstly require characteristics as a point light source. Therefore, there is a demand for making the overall length as short as possible and compatibly. Second, by making the surface temperature of the spherical portion of the inner seal as uniform as possible, it is desired to make the distribution of gas components filled in the inner seal as uniform as possible and to reduce the variation of the emission color as much as possible. There is.

Therefore, a conventional single-ended dual lamp as shown in FIGS. 2 and 3 has been proposed. That is, in FIG. 2, the inner tube ( 1B ' ) is of a double-end type and the outer tube (11') is of a single-end type. The inner tube (1B ') used for the double lamp (B) is of the double-end type, with pinch seals (2') on both sides
Since the pinch seals (2 ') are present, the pinch seals (2') and (2 ') serve as so-called heat sinks to remove heat from both sides of the sphere (3') and reduce the surface temperature of the sphere (3 ') to some extent. Although it is useful for uniformity, since the counter electrodes (6 ') (6') are arranged in a straight line, the distance between the discharge parts at the tip of the counter electrodes (6 ') (6') is
(Sb) and the pinch seal portions (2 ′) and (2 ′) are added to the length of the entire shape of the inner tube ( 1B ′ ), and there is a disadvantage that the overall length is increased.

On the other hand, the double lamp (C) shown in FIG. 3 is of a single-end type inside and outside, and a single-end type internal tube (3c ') is disposed in a vertical direction, and electrodes are vertically arranged. It is an example. In this case, only one pinch seal portion (2 ') is provided in the inner tube (3c'), and two electrodes (6 ') (6') are parallel from the pinch seal portion (2 '). are erected on the electrodes (6 ') (6') discharge section of the distal end (F ') (F') a straight line connecting together (L ') of the electrode (6' to Cartesian to) (6 ') It has become.

Accordingly, the internal tube of the double lamp (C) in FIG. 3 (3
c ') is the sum of the spherical part (3') and one pinch seal part (2 '), and the pinch seal parts (2') and (2 ') are symmetrical on both sides of the spherical part (3'). In addition, both electrodes (6 ′) and (6 ′) are arranged on a straight line, and the distance (Sc) between discharge parts between the electrodes (6 ′) and (6 ′) is added to the entire length of the double-end type internal. Although the whole can be formed very compact compared to the double lamp (B) using the tube ( 1B ' ), the outer tube (1
1 ')
Since there is only one pinch seal part (2 ') that removes heat from (3'), heat is taken away near the pinch seal part (2 ') and the temperature decreases, and the pinch seal of the spherical part (3') Since heat is not taken away at the position opposite to the part (2 '), it becomes high temperature, and the surface temperature of the whole sphere part (3') varies, which suppresses the decrease in luminous efficiency and color variation. There was a disadvantage that it was not possible.

[0006]

SUMMARY OF THE INVENTION The present invention solves the above two demands of compactness and uniform surface temperature of the sphere.
The development of a metal vapor discharge lamp that can be achieved at a high speed is an issue to be solved.

[0007]

In order to achieve the above-mentioned object, a single-ended double lamp (A) according to the present invention comprises a double-end type internal sealing member (1a) having pinch seal portions (2) at both ends. ), The base end thereof is embedded in the pinch seal portion (2) of the inner sealing body (1a), and a shaft portion (4) extending from the pinch seal portion (2) is arranged in parallel, The discharge part (F ) at the tip of the shaft part (4) projects substantially perpendicularly to the shaft part (4),
As a result , the straight line (L) connecting the discharge part (F) with respect to the shaft part (4)
Single having substantially orthogonal disposed opposite to the electrodes (6) (6) and the de-configured internal pipe (1), incorporates the inner tube (1), the pinch seal portion at one end (2) End-type external pipe (11), embedded ends of external lead rods (13) (13) embedded in pinch seal part (12) of external pipe (11), and pinch seal part of internal seal (1a). 2) It is characterized by comprising an intermediate lead rod (14) (14) for connecting the electrode (6) of (2) with the buried end of the electrode (6).

As a result, it is possible to make the entire length of the inner tube (1) companion, and to prevent variations in luminescent color due to equalization of the surface temperature of the spherical portion (3) of the inner tube (1).

According to the second aspect, the intermediate lead rod is provided.
(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]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. (1) is an inner tube, an inner seal (1a), a pair of electrodes (6)
(6). The inner sealing body (1a) is made of quartz glass, has pinch seal portions (2) on both sides, and has a spherical portion (3) at the center.

The electrode (6) is composed of a shaft part (4) and a winding part (5), the base end of which is connected to the pinch seal parts (2) (2) of the inner seal (1a). Each is buried, and the base end is connected to the molybdenum metal foil (7) at the pinch seal portion (2). Electrode (6) extended from pinch seal part (2)
The shafts (4) are arranged in parallel with each other, and the winding (5) at the tip of the shaft (4) projects substantially at right angles to the shaft (4) , and has a spherical shape. They are arranged facing each other at the center of the part (3).

The spherical portion (3) is filled with various halogen gases, rare gases and other components according to the type of the incandescent lamp as required.

[0013] (11) is a single-end type external pipe having a pinch seal portion at one end, and has the internal pipe (1) built therein. Molybdenum metal foils (16) and (16) are embedded in the pinch seal portion (12) of the external tube (11), and the external lead rod (1
3) and (13) are welded to the molybdenum metal foils (16) and (16), respectively, and led out. The intermediate lead rods (14) (14), which are welded to the molybdenum metal foil (7) of the pinch seal portion (2) of the inner tube (1) and derived therefrom, are connected to the outer tube (11).
Molybdenum metal foil (1) embedded in the pinch seal section (12)
6) Welded to support the inner tube (1).

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

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

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

[0017]

As described above, the single-ended 2 of the present invention is used.
In the case of a heavy lamp, a double-end type internal seal having pinch seals at both ends, and a shaft part whose base end is buried in the pinch seal of the internal seal and extends from the pinch seal Are arranged in parallel with each other, and the discharge portion at the tip of the shaft portion projects substantially at right angles to the shaft portion.
So that the straight line connecting the discharge parts is substantially orthogonal to the shaft part .
An internal tube composed of electrodes arranged in the same direction , a single-end type external tube incorporating the internal tube and having a pinch seal portion at one end, and an external lead rod embedded in the pinch seal portion of the external tube And the intermediate lead rod for connecting the embedded end of the electrode of the pinch seal portion of the inner seal to the embedded end of the inner seal, so that the entire length of the inner tube can be reduced, and as a result, the single-ended double The overall length of the lamp could be shortened, and the variation of the emission color due to the equalization of the surface temperature of the spherical portion of the inner tube could be prevented by the heat sink effect of the pinch seals on both sides of the spherical portion.

Furthermore, since the intermediate lead rod connecting the embedded end of the external lead rod embedded in the pinch seal portion of the outer tube and the electrode embedded end of the pinch seal portion of the inner seal is inserted through the ceramic pipe. In addition, the photoeletron effect can be prevented and the life of the inner tube can be extended.

[Brief description of the 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)… Inner tube (1a)… Inner seal (2)… Pinch seal part (3)… Spherical part (4)… Shaft part (5)… Winding part (6)… Electrode (7)… Molybdenum metal Foil (11)… Outer tube (12)… Pinch seal part (13)… Intermediate lead rod

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01J 61/34 H01J 61/30 H01J 61/36

Claims (2)

(57) [Claims] 1. A double-end type internal seal having pinch seals at both ends, and a base end portion embedded in a pinch seal of the internal seal, and a shaft extending from the pinch seal is parallel. The discharge portion at the tip of the shaft portion projects substantially at right angles to the shaft portion, whereby the straight line connecting the discharge portions is opposed to the shaft portion so as to be substantially orthogonal to the shaft portion. An internal tube composed of the arranged electrodes, a single-end type external tube containing the internal tube and having a pinch seal portion at one end, and an external lead embedded in the pinch seal portion of the external tube. A single-ended double lamp comprising a buried end of the rod and an intermediate lead rod connecting the buried end of the electrode of the pinch seal portion of the inner seal. 2. The single-ended double lamp according to claim 1, wherein the intermediate lead rod is inserted through the ceramic pipe.