JPS5825061A - Discharge lamp - Google Patents

Abstract

PURPOSE:To aim at simplification in manufacturing an inner tube in the way turning it into a straight tubiform type, by setting up a couple of first inner tubes with a built- in electrode each as well as a couple of second inner tubes proximate to the first pairs at the within of an outer tube, while providing discharge guide holes corresponding to these inner tubes. CONSTITUTION:A couple of first inner tubes 5 comprising electrodes 3 each at the lower end and bottling up the upper end are set up at the within of an outer tube 1 which seals mercury and a noble gas, along the longitudinal direction of the outer tube 1 while a couple of second inner tubes 7 are set up in position proximate to the inner tubes 5. In addition, a fluorescent substance layer 10 is laid on the inner wall of the inner tubes 5 and 7 each and also a discharge guide hole 6 is formed at the upper end side of the inner tube 5 while a corresponding discharge guide hole 8 is formed as well at the upper end side of the inner tube 7 and another discharge guide hole 9 at the lower end side of the same tube 7 respectively. Therefore, discharge passages A as shown in broken lines are made up whereby lamplighting can be done besides all inner tubes 5 and 7 are turned into a straight tubeform type, dispensing with bending jobs, so that they are excellent in strength and can be produced in a very easy manner.

Description

[Detailed description of the invention] The present invention relates to a compact discharge lamp.

2. Description of the Related Art Conventionally, there is a compact discharge lamp such as a fluorescent lamp, as shown in FIG. That is, a phosphor layer is formed on the inner surface at both ends.

A straight glass tube (G) with an electrode (3) sealed in the
It is folded in half and then folded in half so that this bent part is located near the electrode (3).

However, the above-mentioned conventional fluorescent lamp has a straight glass tube (
Since the glass tube (G) is complicatedly bent, it is very difficult to manufacture, and the strength of the glass tube (G) is reduced due to the large number of bent parts.Gloves (not shown) are used to protect the glass tube (G) and provide a decorative design.
Therefore, it is normally used with the entire surface covered. In this case, since the heat dissipation of the fluorescent lamp is obstructed by the glove, the temperature around the fluorescent lamp increases and the mercury vapor pressure within the lamp becomes undesirable, which has the drawback of reducing lamp efficiency.

This invention was made in view of the above drawbacks.

The purpose of this is to fill an outer tube with mercury and a rare gas sealed inside and a pair of electrodes sealed at the bottom.One end of each nine electrodes is placed inside the outer tube, and the side near the other end is closed. two first inner tubes each having a discharge guide hole formed therein;
In addition, a first tube is provided on the side of the outer tube distal end, which is arranged in parallel with the first inner tube.
Two second inner tubes are provided, each having a first communication hole that communicates with the discharge guide hole of the inner tube and a second communication hole that communicates with each other on the bottom side of the outer tube, thereby facilitating manufacturing. In addition, it is an object of the present invention to provide a discharge lamp that can improve lamp efficiency.

An embodiment of the present invention will be described below with reference to FIGS. 2 and 3.

In these figures, (1) is a cylindrical outer tube made of a light-transmitting material with a dome-shaped tip and filled with mercury and rare gas, (2) is a stem that closes the bottom of this glass tube (1), (3) Lead wire (4) implanted in the dove stem (2)
), a pair of electrodes protruding into the outer tube (1) through (5
) is formed of glass, and one end encloses the electrodes (3) individually so that the electrodes (3) do not cause discharge or short circuit, and the other end extending in the longitudinal direction of the outer tube (1) is closed. Two f! :, 1 inner tube, (6) is a discharge guide hole drilled in the side of the other end of this first inner tube (5), (7) is the above-mentioned first inner tube.
two cylindrical second inner tubes made of glass that are arranged adjacent to and adjacent to the inner tube (5) of the second inner tube (7);
is closed at both ends, and a discharge guide hole (6) is provided on the side corresponding to the discharge guide hole (6).
A first communication hole (8) is formed so as to connect and communicate with each other so as to induce discharge passing through the electrode (6). Discharge path (A
) are joined and communicated so as to form a second communication hole (9).
) is formed. a groan is the first one above. Second inner tube (51
, (a phosphor layer formed on the inner surface of 71).

One end of the lead wire (4) led out of the outer tube (1) is connected to the starter +111, and the other end is connected to the starter +111 through the current limiting element α, and the other end is directly connected to the starter +111. It is connected to the account α book. Note that (14 is an inner tube support member.

In a discharge lamp configured in this way, now.

When the cap (II) is connected to the power supply, the operation of the starter (Ill) forms a discharge path (N) as shown by the broken line and lights up. The discharge is guided from the first communication hole (8) into the second inner tube (7) via the discharge guide hole (6), and then into the second inner tube (7).
9) into the other second inner pipe (7) 2 and then through the first communication hole (8) of the other second inner pipe (7) to the other first inner pipe (5). It is something that can be reached.

The discharge path formed in this way is almost the same as the conventional one shown in Fig. 1, and is suitable for compactness. Since the tubes (5) and +71 are all straight tubes, 9
No bending is required, making manufacturing extremely easy.

Furthermore, since bending is not required, this process prevents the inner thickness of the inner tubes (5) and (7) from becoming extremely thin, which also leads to improved strength of the inner tubes (51 and +71). The outer tube (inner tube (5) becomes hot) that airtightly surrounds the tubes (5) and (7).

(7) and is in contact with the outside air over a wide area, the coldest point temperature that regulates the mercury vapor pressure can be efficiently maintained close to room temperature, which is advantageous.

Furthermore, since the outer tube also has the function of a conventional glove, it is possible to provide an excellent design by selecting from nine different shapes.

In the above embodiment, a phosphor layer (lI) was formed on each inner tube (51, (71), but this phosphor layer +10 was formed on the inner surface of the outer tube (1), (51, even if (7) is made of ultraviolet-transparent glass.

Effects equivalent to those of the above embodiment can be obtained.

As explained above, the present invention has a discharge path made by folding a straight line in two to form a U-shape, and then folding this in two again. To.

Two first inner tubes each containing an electrode at one end, a first communication hole that is arranged in parallel with the first inner tube and communicates with the inner tube, and a second communication hole that communicates with each other are formed. Since the second inner tube was installed.

It is possible to provide a discharge lamp that is easy to manufacture, does not reduce the strength of the inner tube, and has improved lamp efficiency.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing a conventional compact discharge lamp.
FIG. 2 is a perspective view showing an embodiment of the discharge lamp according to the invention, and FIG. 3 is an exploded perspective view showing an inner tube of the discharge lamp according to the invention. In the figure, (1) is the outer tube, (3) is the electrode, and (5) is the first inner tube. (6) is a discharge guide hole, (7) is a second inner tube, (8) is a first communication hole, (9) is a second communication hole, and aα is a phosphor layer. Note that the same reference numerals in each figure indicate the same or corresponding parts. Agent Tsutomu Kuzuno - Figure 111

Claims (3)

[Claims] (1) An outer tube made of a light-transmitting material with mercury and rare gas sealed inside, a pair of electrodes arranged at the bottom of this outer tube, each of which is individually sealed at one end, the other end is closed, and the other end is sealed. Two cylindrical first inner tubes each having a discharge guide hole formed on the end side. A first communication hole is disposed close to the first thoracic tube and has both ends closed and communicates with the discharge guide hole of the first inner tube, and is located near the electrode and communicates with each other. The second communication. A discharge lamp comprising two second inner tubes each having holes formed therein. (2) The discharge lamp according to claim 1, wherein the first inner tube and the second inner tube have a phosphor layer on their inner surfaces. (3) The discharge lamp according to claim 1, wherein the outer bulb has a phosphor layer on its inner surface, and the inner bulb is made of an ultraviolet transmitting material.