JPS5812252A - Small-sized metal vapor discharge lamp - Google Patents

Abstract

PURPOSE:To improve the luminous efficacy, prevent going out half-burnt, and avoid damages of a luminous tube by bending the luminous tube so that the angle formed by electrode axises of main electrodes provided on both ends of the tube is made zero or negative. CONSTITUTION:A quartz glas tube with an inside diameter of 3.3mm., for instance, is bent in an arc with the maximum outside dismeter D of some 20mm. to form a luminous tube 105, on both ends of which are arranged electrodes 106a, 106b. Extension lines of electrode axises 107a, 107b are crossed each other, and the crossing angle theta of these axises is made about 60 deg.. Crossing of axises means that the angle formed by the axises is in a negative range. In such a lamp, the distance between the electrodes 106a, 106b is made some 25mm. which is extremely longer compared with a conventional one, and the voltage drop ratio at the electrodes is smaller in relation to the luminous wave length, thereby the power factor is large, the lamp is reluctant to go out half-burnt, and the luminous efficacy is also improved. In addition, the space valume is large and the vapor pressure is made some six atm, thus no bursting of the luminous tube 105 occurs.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a small metal vapor discharge lamp with an input power of 100W or less.

In recent years, based on the need to save can power and energy, small and highly efficient 1IIL 11111 degree gold II4 steam discharge lamps have been developed. Considering the power and energy-saving round area, lighting for general private gardens (if energy-saving wall light sources are used, the effect will be great. Metal point air lamps of 100W or less are attracting attention.

By the way, a conventional metal vapor discharge lamp of 100 W or less is shown in FIG. 1 (4) and tBIH. In the type shown in Figure 1, main electrodes 1m and 2b are arranged at opposite ends of an arc tube 1 made of a quartz glass tube, and these main electrodes j! a, Ib, respectively electrode axis J
a, Jb are the sealing parts 4m, 4b of the arc tube 1, and the external lead wires are connected via the Yukin JII4 foil conductor 6m, lb.
.

gb+2 connected. The input power t-1 of such an arc tube 1 (=in the case of 1 m of main electrodes, the distance between Ib, that is, the distance between electrodes is about 5111, which is 97)
This is to reduce the power to less than 00W, and it is extremely short.However, if the electric distance is short, the potential drop rate at the electric pole will be large, leading to a decrease in luminous efficiency, and the power source will not be able to make a profit. m There is a problem that is easy to see.Also, this one is I1
1 [Xu r&! 1 Even though the distance is short, the lamp voltage is
! 1OV-v, 10 (1') (2) Due to the large weight of the sealed water canister, the vapor pressure will exceed several atmospheres in the operating state, which may cause the arc tube to burst.4 be.

In the case of Fig. 1 1a, the quartz glass-encased arc tube chain 11
At one end, main electrodes 12 and 12b are provided, and the electrode shafts 11a and Ilb of these main electrodes 11s and Ilb are formed only at one end of the arc tube 1, and are sealed in the large stopper part 14 and are made of metal foil conductors. 18m, external lead wire 1-1. via 15b. Ig
bji II Ribbon. Even if this turtle is 4, the electrode opening is still square, so it is different from the case of the country shown in Figure 1 above.
It has some drawbacks.

The present invention was made based on the above circumstances, and the seventh object is to increase the distance between the electrodes in spite of the small size of the arc tube, so that the temperature rise in the sealed portion is promoted. (Secondly, the present invention aims to provide a small metal vapor discharge lamp that can improve the luminous efficacy, prevent the lamp from extinguishing, and eliminate damage to the arc tube.)

That is, in the present invention, the arc tube is bent, and both ends 6 of the arc tube are bent.
By making the angle between the electrode axes of the two mourner electrodes zero or negative, the overall size of the arc tube can be made more compact regardless of the distance between the two electrodes, and the sealing parts can be separated from each other. The compact gold-14 steam discharge lamp is characterized by being relatively close to each other, allowing the temperature of the sealing part to rise, thereby achieving the above purpose.

An embodiment of the present invention will be described below based on FIG. 2.

In Fig. 2, 101 is the outer bulb), and considering the alternation with incandescent bulbs, the pulp of incandescent bulbs is tt rw> shaped, with a maximum diameter of about 100 lbs. ! It is 011m.

101 is the stem, 10M is the base, and 104 is the hat.

Reference numeral 104b indicates an internal conductor that also serves as a support.

106 is an arc tube according to the present invention, for example, the circular diameter λ
A 3U quartz glass tube is bent, and the e-human ykD is 2.
011118f The electrode shaft 101a has a circular arc shape (two-shaped). At both ends of the fader tube 108, electrodes 106m and 101b are arranged.

xorb is connected to external leads lillJJ(1m, JJab) via sealed metal foil conductors 109m, 1011b, respectively.

These external lead wires 110m and 110b are 1IIT
The internal conductors 104m and 104b (two-layer M't) are connected. In the arc tube tart with the above configuration, the distance between the electrodes is il!
The weight is approximately 25 WJ along the central axis of the quartz glass tube.

The extension lines of the 101m and 10rb axes of the Kuki polar axis intersect with each other, and the intersection angle of these axes is 15Of. Note that the fact that the axes intersect means that the angle formed by these axes is in a negative range. Argon gas is contained in the arc tube 101 as a starting rare gas.
Torr, 10 mp of mercury, 3-, scandium (8c) and sodium (N1) iodides are enclosed.

In the small metal halide lamp C2 having such a configuration C2, the lamp voltage is 130V.

When the lamp input power is 5oW, the luminous efficiency at -2 is 41k
i7! Sjm/W, average color rendering index is 6o mediocre and 9.

However, in such a lamp, the distance between the electrodes is 2
51u111f, so the conventional figure 1 (ship or IBI
Therefore, since the potential drop rate at the electrode is smaller than the emission length c2, the power factor increases by 4, and the power factor does not increase by 1, which improves the luminous efficiency. It is. tThe distance between the electrodes is long like an octopus (
2. In addition, when the extension lines of the electrode axes 101m and 10Wb intersect, the sealing portions 101a and 10lb at both ends approach each other.
Since the heat generated in the two holes mutually heats the sealing portions on the other side, the evaporation of the sealed metal in the vicinity of these piercing portions is promoted, contributing to an improvement in luminous efficiency. In addition, the space volume is larger than that of the conventional one, and the vapor pressure changes by 6 atmospheres, so that the explosion of this nine-light emission tube @101 does not occur.

Note that 1. when bending a quartz glass tube, 4. its maximum diameter Dg
! Since the OU machine is vertical, the outer tube made of incandescent bulb (maximum diameter 50mm)
It also has the advantage of being able to be accommodated sufficiently within the MU.

FIG. 3 (2) shows another embodiment (= superior arc tube) of the present invention. This arc tube 131 is made by bending a quartz glass tube into a bald U-shape.
The angle Ha formed by this is zero and is parallel to the arrow.

The obtuse light tube 121 is a U-shaped quartz glass tube with an inner diameter of 8U (double structure, when the distance between the poles is 2513, xenon gas is 100 Tart as a starting gas, and ice image is 4 mj).
'% and thallium iodide, thallium iodide) 5 m? It is enclosed. Convert such a luminous tube JJJ to an outer tube 101 yen C as shown in Figure 2.
Nitrogen gas is stored in the outer tube 101 (= 200 Torr of nitrogen gas).
The enclosed lamp had a lamp voltage of 125 V, a lamp input power SOW, a dragon effect of JI 701 s/W, and an average color rendering index of 80 Ra.

This third example also has an effect similar to that of the case of FIG. 2, since the electrode distance is large and the sealing portions are close to each other.

In addition, in both the case of 1I21Kl and the case of Figure 3, if you coat it with an infrared reflective film as shown in %#E3 Encyclopedia 2 and cover it with 9 heat-resistant translucent 3 1200, the heat radiated from the arc tube will be reduced. 42) Instead of protecting the outer tube 101, the heat reflected by the outer sleeve 5oot2 promotes an increase in the humidity of the arc tube, increasing the vapor pressure and improving the luminous efficiency. .

However, in the case of FIGS. 2 and 3!9CI, the electrode axis 10
The inner length of 1m and 10rb is negative or zero (
Compared to this, in the conventional example of Bl, the angle f# formed by the electrode axis is 180 @ and positive. It can be seen that the stutters in Figures 1 (A) and (B) are curved chains and there are no nine, so the effect of the present invention cannot be expected. .

Note that the present invention does not apply to metal halide lamps, but also applies to pressurized sodium lamps, high-pressure water lamps, etc.
It's possible to do so.

According to the present invention, in a lamp 12 of 100 W or less, the arc tube tube is bent, and the angle between the electrode axes of the nine main electrodes is arranged at both ends I of the arc tube chain 1. It is configured to be zero or negative. Therefore, this product has a small arc tube; it can be compacted, it can lengthen the electrical connection operation, and it can have a good luminous efficiency. It is possible to reduce the number of times the arc tube disappears, and to lower the vapor pressure to prevent the arc tube from breaking. Since the sealing portions of the arc tube are close to each other, there is an advantage that the sealing portions promote an increase in m* and greatly contribute to improving luminous efficiency.

[Brief explanation of drawings]

FIG.
FIG. 3 is a perspective view showing a modification of the present invention. 108.111... Arc tube %7018゜J II #
k-・Main electrode, Jarm, 101b”・electrode axis,
jJOla, J08b-...Sealing part. Patent Attorney Suzu Hiko, Figure 1, Figure 2, Figure 3

Claims (1)

[Scope of Claims] A pair of main electrodes are provided at both ends of the arc tube tube. Inside the cough tube (=starting rare gas, water scissors, and luminescent metal or metal hygenide are sealed, and the input power of the lamp is 100 W. The following is a small metal vapor discharge lamp (the above-mentioned arc tube tube is bent in two positions, and a pair of main 11 poles at one LIJI end thereof (characterized in that the internal relationship between the electrode axes in the two positions is negative or negative) A small metal vapor discharge lamp.