JPH0235167Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a fluorescent lamp used as a light source for lighting equipment, display devices, and the like.

[Prior Art] An example of the structure of a fluorescent lamp is shown in FIGS. 4 to 6. In the figure, 1 is a glass tube, 2 is a cylindrical electrode made of iron or nickel, etc., 3 is a stem sealed to the end of the glass tube 1, and 4 is an introduction wire supported by this stem 3. This introduction line 4
is spot welded to the inner peripheral surface of the electrode 2 to form the electrode 2.
is located near the tip of the stem 3.

To attach the above fluorescent lamp to a printed circuit board, both ends of the lamp are inserted into the rubber socket 5, the lead-in wire 4 is bent along the groove on the end face of the socket 5, and the tip is fixed to the printed circuit board 6 by soldering. .

However, in such a structure, the length between the flare of the stem 3 and the tip of the stem must exceed a certain dimension for manufacturing purposes, so the dimension A' between the lamp end and the tip of the electrode 2 becomes large. . Since this range A' becomes the non-light emitting part of the lamp, the ratio of the effective light emitting part B' to the total length of the lamp becomes small.

Furthermore, since the non-light emitting part of the lamp is long, extra space is required during assembly.

[Object of the invention] An object of the invention is to provide a fluorescent lamp that can increase the effective light emitting area.

[Summary of the invention] The present invention forms a cylindrical electrode having an electron inflow/outflow hole and an inlet wire insertion hole on the tip surface, and a connecting wire member is protruded from the tip surface of the electrode. The electrode and button stem are integrated by spot welding the lead-in wire supported on the button stem to the button stem, and the getter is placed in a hollow position within the cylindrical electrode to the getter support wire supported on the getter stem supported on the button stem. The button stem is sealed to the end of the glass tube.

[Example] Figures 1 to 3 show an example of the present invention, in which 11 is a glass tube, 12 is a cylindrical electrode made of iron, nickel, etc. In addition to forming an electron inflow/outflow hole 13 and an introduction wire insertion hole, a connecting wire member 14 is provided in a protruding manner. A button stem 15 supports the lead-in line 16 and the getter support line 17. The electrode 12 is integrated into the button stem 15 by spot welding the lead-in wire 16 to the connecting wire member 14, and the getter (getter plate or ring getter) 18 is attached to the getter support wire 17.
It is fixed in a hollow position inside.

Note that 19 is a printed circuit board, and 20 is a rubber socket, and the lead-in wire 16 is led to the printed circuit board 19 along the groove of this rubber socket 20 and connected by soldering.

In this way, the button stem 15 is used as a stem, the wire connecting member 14 is provided on the electrode 12, and the lead-in wire 1 is
When 6 is spot welded, the non-light-emitting part A is significantly reduced, and the ratio of the effective light-emitting part B to the total length of the lamp increases. Accordingly, the space required for assembly is reduced.

In addition, electrons flow into the tip surface of the cylindrical electrode 12.
There is an outflow hole 13, and electrons flow in and out through the electrode 12.
It is also carried out inside. That is, the electrode discharge area increases. As a result, the number of electrons per unit area is reduced, and the spatter of the electrode 12 is reduced. Moreover,
Since the electrode 12 and getter 18 are separated, sputtering of the getter material is also prevented. Further, a getter support line 17 is supported on the button stem 15 so that the getter 18 is in a hollow position within the electrode 12.
The hollow position in the electrode 12 means that when electrons flow in and out, especially when ions rush into the electrode, the impurity gas stored in the electrode is released. This is a location where it is likely to occur, and the structure is designed to maximize the effectiveness of the getter.

[Effects] As described above, according to the present invention, a button stem is used, a wire connecting member is provided on the tip end surface of the electrode, and the lead wire and the wire connecting member are connected so that the electrode is located near the flare of the stem. Since it is spot welded, the non-light emitting part is reduced to about 1/3 of that of conventional lamps, making it possible to significantly increase the ratio of the effective light emitting part to the total length of the lamp, and also reducing the space required for assembly. Furthermore, since the getter is mounted electrically separated from the electrode, it is possible to prevent the getter material from sputtering, resulting in a stable getter effect and stable characteristics. Furthermore, since electron inflow/outflow holes are provided on the tip surface of the electrode, the electrode discharge area increases and the number of electrons per unit area decreases, which is effective in preventing sputtering of the electrode material. Furthermore, by arranging the getter in a hollow position within the electrode where impurity gas is likely to be generated, the getter effect can be utilized with maximum efficiency.

Let's summarize the effects of this invention.

In order to obtain the getter effect, if the temperature can be uniformly heated, the surface area of the getter should be large and it can exist inside the electrode, and if it is placed in a place where impurity gas is likely to be generated, the getter material should be separated from the discharge circuit. It is to set it up.

Uniform heating was made possible by housing a getter inside the electrode. During lamp discharge, more electrons flow in and out than the inner diameter of the electrode, so the temperature inside the electrode becomes uniform.

The effect of having a large getter surface area within the electrode is that impurity gas (H, O, CO) can be used as a getter.
When adsorbing, it becomes effective when it is around this area or collides with getter material. Therefore, it is placed in a place where collision with this impure gas is likely to occur, increasing the adsorption area and increasing the probability of collision.

Since impurity gas is likely to be generated, storing the getter inside the electrode causes the impurity gas stored in the electrode to be released when electrons flow out, especially when ions rush into the electrode. Therefore, arranging the getter within the electrode increases the getter effect since the density of the impure gas is high.

By separating the getter from the discharge circuit, re-release of the adsorbed impurity gas is prevented. Also, if ions enter the getter material for a long time,
In addition to the re-emission of impure gases, the getter material is sputtered by ions and the getter material is consumed, which prevents the getter effect from decreasing.

[Brief explanation of the drawing]

1A and 1B are plan views showing one embodiment of the fluorescent lamp according to the present invention; FIGS. 2 and 3 are plan views and side views of the button stem and electrode assembly in the same embodiment; 6 to 6 are a plan view of a conventional example, a plan view of a stem and electrode assembly, and a side view of the same. 11...Glass tube, 12...Electrode, 13...Electron inflow/outflow hole, 14...Connection member, 15...
Button stem, 16...Introduction line, 17...Getter support line, 18...Getter, 19...Printed circuit board, 20...Rubber socket.

Claims (1)

[Scope of utility model registration request] An electrode is formed in a cylindrical shape having an electron inflow/outflow hole and an introduction wire insertion hole on the tip surface, and a connecting wire member is provided protruding from the tip surface of the electrode, and an introduction wire supported by a button stem is provided on the connecting wire member. The electrode and button stem are integrated by spot welding the wires, and the getter is attached to the getter support wire supported by the button stem so that it is in a hollow position within the cylindrical electrode, and the button stem is attached to the end of the glass tube. A fluorescent lamp characterized by being sealed.