JPS6039734A - Lamp - Google Patents

Abstract

PURPOSE:To reduce the consumption of sealing material and improve the commercial value of a lamp by arranging glass frit facing the inside wall of a bulb aperture and sealing an end plate and the aperture end using the inside wall of the aperture end. CONSTITUTION:A U-shaped bulb 1 with both open ends 2 is provided with a pair of electrodes 4 impedded at the upper part of an end plate 3. In addition, when both aperture ends 2 of the bulb 1 internally enclose each electrode 4 and load the electrode on the surface of the end plate 3, the surface of this end plate 3 is coated with glass frit 5 slightly smaller than the inside diameter of the bulb aperture end 2 and annularly at a position that is opposed to the inside wall 22 of a bulb aperture end 2. This bulb 1 and the end plate 3 are sealed by allowing each bulb aperture end 2 to internally enclose the electrode 4 and glass frit 5 and loading both on the surface of the end plate and then heat-melting glass frit 5. As a result, sealing material is prevented from permeating the external edge of the aperture end 2 and the amount of coating can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a lamp in which the open end of pulp is sealed with an end plate via a gun frit.

[Conventional technology]

As an example of this rung, the applicant has previously proposed a fluorescent lamp shown in FIG. In the figure, (υ is U-shaped pulp with an opening at both ends (21) having a phosphor layer U coated on the inner surface, t3) is an end plate with a pair of electrodes (4) implanted on the upper surface,
(51 is a glass slit that seals the pulp open end (2) and the end plate (3) with the electrodes (4J) contained inside each. (61 is an exhaust pipe.

To seal the bulb opening end (2) of this rung and the end plate (3), as shown in FIG. A glass frit (5) is applied to the glass frit (5), and a pulp open end (2) is applied on this applied surface.
) and melted it in a heating bath.

For this reason, 9M1 had a problem in that the glass frit (5) also protruded from the outer periphery of the pulp open end 12+, spoiling the appearance of the product.

Secondly, since the annular glass frit (5) is applied in a band shape that is wider than the inner and outer diameters of the open end (2), there is a problem in that a large amount of glass frit (5) is used.

Thirdly, it is difficult to equalize the coating thickness (T) of the glass frit (5) that seals both open ends (2+) of the pulp on both open ends, and the unbalance in thickness (T) causes the pulp to (The pulp (1) had to be sealed with the pulp (11) tilted, and in severe cases, the pulp (1) remained tilted even after the sealing was completed.)

On the other hand, the sealing between the end plate (3) and the pulp opening end (2:
As shown in the figure, place the end surface (to) of the pulp open end (2) on the end plate (3) surface, and
I! It is also possible to seal it with the end plate (3) at D. in this case.

Since the pulp open end (end face (C) of 21) can be placed on the flat end plate surface, it is effective in solving the third problem mentioned above, but it is not effective in solving the first and second problems. In addition, the airtightness between the outside world and the pulp (1) is maintained only by the outer wall (211) of the opening end (2), but this outer wall Qυ is used for the purpose of placing the bulb before sealing and for the glass. When the frit (5) is heated and melted, dust and the like tend to stick to it, and there are new problems such as airtight leakage easily occurring in this area.

[Summary of the invention]

This invention was made in order to eliminate such drawbacks, and in a lamp having a pulp whose end plate is sealed to the open end via a glass frit, the end plate is sealed to the inner wall of the pulp open end. The pulp opening end is sealed with a glass frit, and the sealing between the end plate and the pulp opening end is performed on the inner wall of the pulp opening end.

[Embodiments of the invention]

One embodiment of the present invention will now be described with reference to FIGS. 4 and 5. In the figure, (1) indicates both ends 121-1.
)ip U-shaped pulp, (3) is an end plate with a pair of electrodes (4) implanted on the upper surface. Furthermore, this end plate (3)
On the surface, both open ends (21) of pulp llj are connected to electrodes (
4) is placed on the end plate (3) surface, the pulp open end (2) is placed at a position corresponding to the inner wall 4 of the pulp open end (2).
2) has a slightly smaller inner diameter and is coated with a glass frit (5) in an annular shape (other than the above, it is the same as the lamp in FIG. 1).

The pulp (1) and the end plate (3) are sealed together so that each pulp open end (2) is connected to the electrode (4) and the glass frit (
5) is placed on the end plate surface, and in this state, the glass frit (51) is heated and melted. FIG. 5 shows the sealed state after heating.

That is, according to such a configuration, the glass frit (
Even if the pulp 5) is melted in the bath, it is locked by the inner wall of the pulp open end (2), so it will not protrude to the outer peripheral edge of the open end (2). In addition, the glass slit (5) can be coated with a slightly smaller annular shape than the inner diameter of the pulp opening end (21), so even if the thickness of the slit is slightly thicker, the amount of coating will be smaller than that of the rung shown in Figure 1 above. Reduce.The inner diameter of the open end of pulp (1) is 1
When comparing the two using pulp with a wall thickness of 0.85 m for 5 hours, the amount used in the present invention was approximately 2.51 g per rung, whereas in the case of the lamp shown in Fig. 1, it was 4.5 g. Ta.

In addition, the airtightness between the outside world and the pulp (1) is mainly at the open end +21
(on the inner wall of the inner wall), but compared to the outer wall 12υ, the inner wall t2g is less likely to attract dust, so there is no problem of airtight leakage. Moreover, compared to the outer walls, the inner walls (
Since the circumferential length of 13 is naturally short, the airtight area is reduced, which is more advantageous against airtight leakage. Further pulp (
Since the open end (21) of 1) is placed on the flat end plate (3), there is no tilting of the pulp.

Note that this glass frit +51 may be made into an annular molded product that is slightly smaller in diameter than the inner diameter of the pulp opening end (2).

FIG. 6 and FIG. 1 respectively show other embodiments of the present invention, in which the end plate (3) has glass frit housing grooves c+Il.
A molded glass frit (5) is placed inside this accommodation HtSU and the pulp open end! The inner wall (2) of 21 is sealed. According to such a configuration, in addition to the effects of the above-described embodiments, the molded glass frit (5 holes) in FIG. 6 also serves as positioning when sealing the bulb tlJ. Fig. 8 shows yet another embodiment, in which the end plate (3) is provided with a protrusion corresponding to the inner diameter of the glass frit 151.

Glass frit (5) molded around the periphery of this protrusion (to)
It is arranged. In this embodiment as well, effects similar to those described above can be obtained.

In addition, in Fig. 9, the electrode (4) is implanted in advance on the flared left last stem (41), but when such an electrode (4) is used, the end plate (3) and the valve opening end (
When sealing the inner wall (2) of 2), it is also possible to seal the stem (41) at the same time.

Furthermore, in the above examples, the pulp of the lamp is all U.
Although the shape has been described above, the shape is not limited to this, and the shape shown in FIG. 10 may be used. Furthermore, as shown in FIG. 11, the present invention can also be applied to a lamp with a double tube structure in which a bent pulp (1) is placed inside an outer tube (1) forming an airtight space.

〔Effect of the invention〕

As described above, this invention has pulp sealed through an end sheet metal glass frit that is sealed at the open end, and the glass frit is arranged corresponding to the inner wall of the pulp, so that it can be used as a lamp. This has the effect of increasing value and reducing the amount of materials used.

[Brief explanation of the drawing]

Figures 1 to 3 are diagrams showing conventional examples, where Figure 1 is a partial sectional view of the lamp, Figure 2 is an enlarged sectional view of the same main part, and - Figure 3 is an enlarged sectional view of the interior of another lamp. 4 and 5 are views for explaining one embodiment of the present invention, and each is an enlarged cross-sectional view of a main part, and FIGS. 6 to 11 are views showing other embodiments of the invention, respectively. . 6 to 9 are enlarged cross-sectional views of essential parts. FIG. 10 is a partially cutaway schematic diagram, and FIG. 11 is a partially cutaway schematic diagram. In the figure, +tll is the pulp and (2) is the valve opening end. @Inner wall of Haharup, (3j is the edge ml (5+ is the glass 7 liter. The same reference numerals in each figure indicate the same or equivalent parts. Agent Masuo Oiwa Figure 1 Figure 1 - Figure 2 Figure 3 Figure 4 m1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 10 Figure 11 Continuation of Figure 1 0 Inventor Hiroshi Ito 5-chome Ofuna, Kamakura City 0 Inventors 1) Minoru Kamakura City Ofuna 5-chome

Claims (1)

[Scope of Claims] tlJ An end plate sealed to the open end is made of pulp sealed via a glass frit. A lamp characterized in that a glass frit is arranged corresponding to the inner wall of the pulp. (2) The lamp according to claim 1, wherein the glass frit is a molded product. (3) The rung according to claim 1 or 2, wherein a glass frit receiving groove is formed in the end plate. (4) The rung according to claim 1 or 2, wherein a glass frit accommodating protrusion is formed on the end plate.