JPS5864733A - Manufacture of electric-discharge lamp - Google Patents

Abstract

PURPOSE:To extend the life of an electric-discharge lamp, and enhance the work efficiency of the lamp by fixing a ring-like metallic plate to a supporting wire, with slants from strut wires by a specified angle, and curving the central part of the supporting wire in such a manner that the metallic plate surrounds a filament coil. CONSTITUTION:A supporting wire 5, the end of which is buried into a stem 2 so that it is electrcally insulated from strut wires 3, is located so that the angles between the wires 3 and the wire 5 are about 45 deg.. A belt-like metallic plate 6 is welded to the upper end of the supporting wire 5. Next, the plate 6 is shaped into an elliptic ring-like shape consisting of two semicircles by use of a roll or the like. After that, the central part of the wire 5 is curved, and the plate 6 is inserted from above a filament coil 4 around the side of the coil 4. As a result, the life of an electric-discharge lamp can be extended, and the work efficiency of the lamp can be enhanced.

Description

[Detailed description of the invention] The present invention relates to an improvement in a method for manufacturing a discharge lamp.

Generally, during operation of a discharge lamp, the electron-radioactive material carried by the filament coil evaporates and generates electrons.

K tends to scatter due to ion bombardment, adhere to the inner tube surface of the pulp, react with mercury, change color to black or brown, impair the appearance, and also reduce the luminous flux. Therefore, is it the same as before? For example, as shown in Figure 1, pulp (
The filament coil (41 is connected between the ends of the strut wire +a+, (31) that extends from the t1 stem (21),
1t-A ring-shaped metal plate (6) surrounding the stem 121) is used as a support! ! (31, (31 is a supporting wire extending electrically insulated) By supporting the filament coil (41), the metal plate (6) can shield the scattered substances from the filament coil (41). , the pulp (11) is prevented from reaching the inner wall surface of the pulp (11), thereby preventing the inner wall surface of the pulp (11) from becoming black.

However, upon maknt of the metal plate (6).

Conventionally, the metal plate (6) is a filament coil (4).
1 was surrounded by a support wire (51K @ II K).For this reason, 9 parts or part of the assembly device were connected to a filament coil (41K).

Alternatively, there is a problem that the filament coil (4) may be deformed due to this. In particular, when mounting the metal plate (6), the electron radioactive substance (not shown) carried by the filament coil (4) and its solvent evaporate and become dry, so that the above-mentioned When a mechanical shock or the like acts on the filament coil (41), cracks occur at the contact interface between the radioactive material and the filament coil (4), as well as at the electron radioactive material itself.This crack is caused by the heat of the electron radioactive material during the exhaust process. In the decomposition process, the removal of the inder causes the electron radioactive material itself to extremely reduce the adhesion between the electron radioactive material and the filament coil (4), resulting in severe vibration.

The electron radioactive substance will fall off the filament coil (4) due to impact, etc., and its life will be significantly shortened. The welding electrode has a complicated structure and requires high welding precision, which often causes welding defects.

Therefore, in reality, a filament coil like this (41
In addition to minimizing damage caused by mechanical shock to #! Because work No.9 is performed with great care in order to reduce contact defects as much as possible, work index No.9 cannot be made faster, making it difficult to improve productivity.

In view of these points, the present invention provides a method for manufacturing a discharge lamp that eliminates mechanical shock to the filament coil during the mounting process and significantly improves workability. I will explain.

In Fig. 2, (1) is a glass bulb, and a phosphor layer (81) is formed on the inner surface.
A light-transmitting conductive film (not shown) can also be formed between the material and the pulp. (21 ke valve (stem sealed at the end of 11), (31, (31 is this stem (21
The pillar 41. +41 is the support line (3).

(3) A filament coil connected between the tips of the filament coil (4+ Kiff), on which an electron-emitting substance such as a ternary carbonate is supported.

(5i ij x f m(21y:, pillar 11A(a
r, (s+ トB) This is a support wire installed in an electrically insulated manner. (6) is a metal plate that is approximately in the shape of a ring and is placed so as to surround the filament coil (4). @+
Supported by 51. (7) is a bent portion formed between the connecting portion of the support wire (5) with the metal plate (6) and the planted portion on the stem (2). In addition, metal plate (61K
The meaning of "ring-shaped" in this article includes not only a completely ring-shaped ring but also a ring-shaped ring with an end having a slight gap.

Next, the method of the present invention will be explained. First, as shown in Fig. 1(a) and Fig. 94, connect the filament coil (41) between the ends of the strut wires (3+, (3!), Electron radioactive material is applied to the central part except for the upper part and supported.Then, a band-shaped metal plate (6) is welded to the upper end of the support wire located at an angle of approximately 45 degrees from the support 11.Next K1ga As shown in the figure, a metal plate (61) is formed into an oblong ring shape with semicircular sides on the left and right using a roll (not shown). The support wire (6) can also be welded to the support wire (6).Next, as shown in Figure 3 φ) and Figure 5, the center part of the support wire (5) is bent to form a ring-shaped metal plate. (Insert the filament coil (41) so that 61 is in a position surrounding the sides of the filament coil (41).
It is fitted from above. This completes the assembly.

In this way, the metal plate (61 support 1! (connection O to 51) and the metal plate (61 ring-shaped shaping Fi, the filament coil (41 at a distance and on its side),
Therefore, the metal plate (6), welding electrode, shaping jig, etc. never come into contact with the filament coil (4).
Therefore, since the filament coil (41) is no longer deformed, it is possible to solve the short lifespan caused by the falling off of the electron radioactive substance.

The connection between the metal plate (61) and the support wire (5) can be carried out by welding using a simple electrode structure, and the workability can be significantly improved without requiring much precision.

It can be applied to mass-produced machines with extremely fast work indexes.

In the present invention, the shape of the metal plate (61) can be arbitrarily set, such as an oblong oval shape or a rectangular one circular shape, and a compound containing mercury or a getter material can also be coated on the metal plate.

As described above, according to the present invention, there is no mechanical impact on the filament coil when connecting the metal plate and the support wire, so it is possible to solve the short lifespan caused by the falling off of electron radioactive substances. Furthermore, since the connection operation is performed at a location separate from the filament coil, excellent effects such as significantly improved workability can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a cutaway side view of the main part of the conventional example, Fig. 2 is a cutaway side view of the main part showing an embodiment of the present invention, and Figs. 3 and 4 are the F! An explanatory diagram of an assembly method related to AK. The IHs diagram is a XX cross-sectional view of Figure 3 (color). In the figure, (11 is a glass bulb, (21ij stem, 0)
is the prop wire, (4) is the filament coil, and (5) is the support wire. (6) is a metal plate, and C7) is a bent portion. Note that the same reference numerals in the figures indicate the same or similar parts. Agent Makoto Kuzuno - Part 1 @2 Figure 2 (α) Figure 94 (bl Figure 5)

Claims (1)

[Claims] A ring-shaped metal plate is fixed at a position 1 separated from the filament coil to the support wire which is electrically insulated from the support wire supporting the filament coil and has an inclination of approximately 45' to the support wire. A method for manufacturing a discharge lamp, characterized in that the central part of the support wire is bent so that the metal plate surrounds the filament coil.