JPH11354244A - Discharge tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a discharge tube used for SSG to repeatedly stably generate constant voltage arc discharge having a prescribed pulse width between the discharge generating surface of an upper discharge electrode and the discharge generating surface of a lower discharge electrode. SOLUTION: The shortest distance D between both side end parts of the whole sub-discharge trigger wires 30 formed in the central part of an inside wall of an airtight cylinder 10 and an upper discharge electrode 20a or a lower discharge electrode 20b in the vicinity of those and the shortest distance B between both side end parts of the whole sub-discharge trigger wires 30 formed on the inside wall of the airtight cylinder 10 and the metallized surface 12a or the metallized surface 12b formed on the upper end or lower end opening part peripheral edge of the airtight cylinder 10 in the vicinity of those, are set so as to fall within a range of 0.5A to 2A, desirably, a range of 1A to 1.5A to a distance A between the discharge generating surface of the upper discharge electrode 20a and the discharge generating surface of the lower discharge electrode 20b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge tube in which an upper discharge electrode and a lower discharge electrode are vertically arranged in an airtight cylinder made of an insulator.

[0002]

2. Description of the Related Art SSG for lighting metal halide lamps
As a discharge tube used for (switching spark gap) and the like, there is a discharge tube as shown in FIG.

In this discharge tube, an upper discharge electrode 20a and a lower discharge electrode 20b made of a metal such as a 42 alloy (iron-nickel alloy) are formed in an axial direction in an airtight cylinder 10 formed of an insulator such as a ceramic. They are arranged facing up and down. Discharge generating surface of upper discharge electrode 20a and lower discharge electrode 2
0b between the discharge generating surface and the discharge generating surface 2b.
4 are formed. A special discharge inducing agent such as barium titanate for smoothly inducing arc discharge is applied to the discharge generating surface of the upper discharge electrode 20a and the discharge generating surface of the lower discharge electrode 20b.

[0004] Metallized surfaces 12a and 12b are continuously provided in a ring shape around the upper and lower opening edges of the airtight cylinder 10. Then, on the metallized surfaces 12a and 12b, a lid 22a made of a metal such as a 42 alloy formed above the upper discharge electrode 20a and below the lower discharge electrode 20b,
22b is brazed. And the airtight cylinder 10
The openings at the upper end and the lower end are hermetically covered with lids 22a and 22b. An inert gas such as an argon gas is sealed in the space inside the airtight cylinder 10.

[0005] At the center of the inner wall of the airtight cylinder 10, FIG.
As shown in the developed view, a plurality of thin sub-discharge trigger lines 30 made of carbon and oriented in a direction substantially parallel to the axis of the airtight cylinder 10, the upper discharge electrode 20 a and the lower discharge electrode 20 b A plurality of sub-discharge trigger lines 30 electrically insulated from each other are formed substantially in parallel at a predetermined pitch.

On the inner wall portion of the hermetic cylinder 10 between the plurality of sub-discharge trigger lines 30, there are a plurality of fine line-shaped discharge trigger lines 32 made of carbon, and the upper discharge electrode 20a
A discharge trigger line 32 electrically connected to the lower discharge electrode 20b through the metallized surface 12b, and a plurality of thin wire-shaped discharge trigger lines 34 made of carbon. The connected discharge trigger lines 34 are alternately formed substantially in parallel with the sub-discharge trigger lines 30.

The discharge tube shown in FIGS. 12 and 13 is constructed as described above. In this discharge tube, the electric charge charged in the capacitor is placed between the upper discharge electrode 20a and the lower discharge electrode 20b. In addition, an arc discharge can be generated between the discharge generating surface of the upper discharge electrode 20a and the discharge generating surface of the lower discharge electrode 20b.

At this time, the sub-discharge trigger line 30 formed on the inner side wall of the airtight cylinder 10 and the discharge trigger line 3 near the sub-discharge trigger line 3
2, 34, the initial discharge can be stably generated at an early stage. The initial discharge generated between the sub-discharge trigger line 30 and the discharge trigger lines 32 and 34 causes an arc discharge between the discharge generation surface of the upper discharge electrode 20a and the discharge generation surface of the lower discharge electrode 20b. The response can be triggered quickly and reliably.

[0009]

However, the above-mentioned discharge tube is used for the above-mentioned SSG, and its upper discharge electrode 20 is used.
a and the lower discharge electrode 20b are charged with a charge of a frequency of 50 to 200 Hz charged in a capacitor,
The discharge generating surface of the upper discharge electrode 20a and the lower discharge electrode 2
0b with the discharge generating surface of 0 mb. It was not possible to stably generate an arc discharge having an operating voltage of about -1000 V having a pulse width of.

Therefore, the present inventor has proposed an airtight cylinder 10 for a discharge tube.
Sub-discharge trigger lines 3 formed side by side on the inner wall
0, the distance between the upper discharge electrode 20a or the lower discharge electrode 20b near the end, the ends of the plurality of sub-discharge trigger lines 30, and the opening of the airtight cylinder 10 near the end. Study on the effect of the distance between the metallized surface 12a or the metallized surface 12b provided on the peripheral edge on the arc discharge generated between the discharge generating surface of the upper discharge electrode 20a and the discharge generating surface of the lower discharge electrode 20b did. The shortest distance D between the end of the plurality of sub-discharge trigger lines 30 and the upper discharge electrode 20a or the lower discharge electrode 20b near the end, and the end of the plurality of sub-discharge trigger lines 30 If the shortest distance B between the portion and the metallized surface 12a or 12b provided on the periphery of the opening of the airtight cylinder 10 near its end is set within a predetermined range, the upper discharge electrode 20a of the upper discharge electrode 20a 5 to 20 msec. Between the discharge generating surface and the discharge generating surface of the lower discharge electrode 20b. It has been found that an arc discharge of a constant voltage such as about -1000 V of a pulse width can be repeatedly and stably generated. Then, based on the discovery, an SSG capable of repeatedly and stably generating an arc discharge having a predetermined pulse width and a constant voltage between the discharge generation surface of the upper discharge electrode 20a and the discharge generation surface of the lower discharge electrode 20b. We have developed a discharge tube for such applications.

That is, the present invention provides a discharge capable of repeatedly and stably generating an arc discharge having a predetermined voltage of a predetermined pulse width between a discharge generation surface of an upper discharge electrode and a discharge generation surface of a lower discharge electrode. It is intended to provide tubes.

[0012]

In order to achieve the above object, a first discharge tube of the present invention comprises an upper discharge electrode and a lower discharge electrode which are vertically arranged in an airtight cylinder made of an insulator. The lid formed on the upper discharge electrode and the lower discharge electrode is air-tightly brazed to a metallized surface provided on the periphery of the opening at the upper end and the lower end of the hermetic cylinder, and the opening at the upper end and the lower end of the hermetic cylinder is provided. A plurality of sub-discharge trigger lines, which are electrically insulated from the upper discharge electrode and the lower discharge electrode, are formed substantially in parallel at the center of the inner wall of the hermetic cylinder, and On the inner wall of the hermetic cylinder between the plurality of sub-discharge trigger lines, arranged substantially parallel to the sub-discharge trigger lines, and electrically connected to the discharge trigger lines electrically connected to the upper discharge electrode and the lower discharge electrode Alternated with the discharge trigger line In the formed discharge tube, both ends of all the sub-discharge trigger lines, with respect to the distance A between the discharge generation surface of the upper discharge electrode and the discharge generation surface of the lower discharge electrode, The shortest distance D between the upper discharge electrode or the lower discharge electrode near the end, and the shortest distance between the ends on both sides of all the sub-discharge trigger lines and the metallized surface near the end. B is 0.5A-2A
Is within the range.

[0013] In the first discharge tube of the present invention, it is preferable that the shortest distances D and B are within a range of 1A to 1.5A.

In this first discharge tube, the shortest distance D between the ends on both sides of all the sub-discharge trigger lines and the upper discharge electrode or lower discharge electrode near that end, and all of them. The shortest distance B between the ends on both sides of the sub-discharge trigger line and the metallized surface around the opening of the hermetic cylinder near the end is within a range of 2A or less, preferably 1.5A or less. Is set to be short. Therefore, the electric charge of a predetermined frequency charged in the capacitor is applied to the upper discharge electrode and the lower discharge electrode, and an arc discharge is repeatedly generated between the discharge generation surface of the upper discharge electrode and the discharge generation surface of the lower discharge electrode. When the shortest distance D is set to be short, the distance between both ends of all the sub-discharge trigger lines set to be short, the upper discharge electrode or the lower discharge electrode near the end, and the shortest distance B are shortened. Arc discharge is induced on the upper discharge electrode surface and the lower discharge electrode surface through the space between both ends of all the set sub-discharge trigger lines and the metallized surface around the opening of the hermetic cylinder near the ends. It is presumed that the creeping corona discharge is repeatedly and stably generated.

Further, the shortest distance D between both ends of all the sub-discharge trigger lines and the upper discharge electrode or the lower discharge electrode near the end, and both sides of all the sub-discharge trigger lines. The shortest distance B between the end and the metallized surface of the periphery of the opening of the airtight cylinder near the end is set to be longer than 0.5A, preferably longer than 1A. Therefore, the electric charge of a predetermined frequency charged in the capacitor is applied to the upper discharge electrode and the lower discharge electrode, and an arc discharge is repeatedly generated between the discharge generation surface of the upper discharge electrode and the discharge generation surface of the lower discharge electrode. When the shortest distance D is set to be long, the distance between both ends of all the sub-discharge trigger lines set to be long and the upper discharge electrode or the lower discharge electrode near the end, or the shortest distance B is increased. Between the ends on both sides of all the set sub-discharge trigger lines and the metallized surface around the opening of the hermetic cylinder near the ends, the discharge generation surface of the upper discharge electrode and the discharge generation surface of the lower discharge electrode It is presumed that the occurrence of arc discharge is prevented prior to the arc discharge occurring during. Here, even if the shortest distances D and B are 0.5 to 1 A shorter than the distance A between the discharge generation surface of the upper discharge electrode and the discharge generation surface of the lower discharge electrode, Between the end of the discharge trigger line and the upper discharge electrode or the lower discharge electrode near the end, or between the end of the sub-discharge trigger line and the metallized surface around the opening of the hermetic cylinder near the end. As described above, the reason why the arc discharge occurs between the discharge generating surface of the upper discharge electrode and the discharge generating surface of the lower discharge electrode prior to the occurrence of the arc discharge during the discharge is as described above. It is presumed that this is because a discharge inducing agent for smoothly inducing arc discharge is applied to the surface and the discharge generating surface of the lower discharge electrode.

As a result, when an electric charge of a predetermined frequency charged in the capacitor is applied to the upper discharge electrode and the lower discharge electrode, a gap is formed between the discharge generation surface of the upper discharge electrode and the discharge generation surface of the lower discharge electrode. It is estimated that an arc discharge having a predetermined voltage with a predetermined pulse width can be repeatedly and stably generated.

A second discharge tube according to the present invention has an upper discharge electrode and a lower discharge electrode which are vertically arranged in an airtight cylinder made of an insulator, and a lid formed on the upper discharge electrode and the lower discharge electrode. Is air-tightly brazed to a metallized surface provided at the periphery of the upper and lower openings of the hermetic cylinder, the upper and lower openings of the hermetic cylinder are covered with the lid, and the inner wall of the hermetic cylinder A plurality of sub-discharge trigger lines that are electrically insulated from the upper discharge electrode and the lower discharge electrode are formed substantially in parallel at a central portion of the air-tight cylinder between the plurality of sub-discharge trigger lines. A discharge formed by arranging, in a wall portion, substantially parallel to the sub-discharge trigger line, a discharge trigger line electrically connected to the upper discharge electrode and a discharge trigger line electrically connected to the lower discharge electrode are alternately formed. In the tube, the upper discharge With respect to the distance A between the discharge generating surface of the electrode and the discharge generating surface of the lower discharge electrode, one end of all the sub-discharge trigger lines and the upper discharge electrode near the end or A shortest distance D between the lower discharge electrode and an end on one side of all the sub-discharge trigger lines;
The shortest distance B between the metallized surface near its end
Between 0.5 A and 2 A, and between the other end of the other sub-discharge trigger line and the upper discharge electrode or lower discharge electrode near the other end. The shortest distance D1 and the shortest distance B1 between the other end of the other sub-discharge trigger lines on the other side and the metallized surface near that end are longer than 0.5A. And

In the second discharge tube of the present invention, it is preferable that the shortest distances D and B are within a range of 1A to 1.5A, and the shortest distances D1 and B1 are longer than 1A.

A third discharge tube according to the present invention is characterized in that an upper discharge electrode and a lower discharge electrode are vertically arranged in an airtight cylinder made of an insulator, and a lid formed on the upper discharge electrode and the lower discharge electrode. Is air-tightly brazed to a metallized surface provided at the periphery of the upper and lower openings of the hermetic cylinder, the upper and lower openings of the hermetic cylinder are covered with the lid, and the inner wall of the hermetic cylinder A plurality of sub-discharge trigger lines that are electrically insulated from the upper discharge electrode and the lower discharge electrode are formed substantially in parallel at a central portion of the air-tight cylinder between the plurality of sub-discharge trigger lines. A discharge formed by arranging, in a wall portion, substantially parallel to the sub-discharge trigger line, a discharge trigger line electrically connected to the upper discharge electrode and a discharge trigger line electrically connected to the lower discharge electrode are alternately formed. In the tube, the upper discharge With respect to the distance A between the discharge generation surface of the electrode and the discharge generation surface of the lower discharge electrode, at least one side end of a part of the plurality of sub-discharge trigger lines, The shortest distance D between the upper discharge electrode or the lower discharge electrode near the end, the end on at least one side of the partial discharge trigger line, and the metallized surface near the end. The shortest distance B between
The shortest distance D2 between 0.5 A and 2 A and between the end of all the other sub-discharge trigger lines and the upper or lower discharge electrode near that end, and The shortest distance B2 between the end of all the sub-discharge trigger lines except the above and the metallized surface near the end
However, it is characterized by being longer than 0.5A.

In the third discharge tube of the present invention, it is preferable that the shortest distances D and B are within a range of 1A to 1.5A, and the shortest distances D2 and B2 are longer than 1A.

In the second or third discharge tube, one side end of all the sub-discharge trigger lines or at least one side end of a part of the sub-discharge trigger lines,
The shortest distance D between the upper discharge electrode or the lower discharge electrode near the end thereof, and the end on one side of all the sub-discharge trigger lines or at least one side of the sub-discharge trigger lines thereof. The shortest distance B between the end and the metallized surface of the periphery of the opening of the airtight cylinder near the end is 0.5A to 2A.
, Preferably within a range of 1A to 1.5A. Therefore, the electric charge of a predetermined frequency charged in the capacitor is applied to the upper discharge electrode and the lower discharge electrode, and an arc discharge is repeatedly generated between the discharge generation surface of the upper discharge electrode and the discharge generation surface of the lower discharge electrode. In this case, the end of one side of all the sub-discharge trigger lines where the shortest distance D is set short or the end of at least one side of some sub-discharge trigger lines where the shortest distance D is set short Part, between the upper discharge electrode or the lower discharge electrode near the end thereof, and one end or the shortest distance B of one side of all the sub-discharge trigger lines in which the shortest distance B is set short. The arc is formed on the upper discharge electrode surface or the lower discharge electrode surface through the space between at least one end of the set part of the sub-discharge trigger line and the metallized surface around the opening of the hermetic cylinder near the end. Discharge When creeping corona discharge to induce reliably stably generated is estimated.

Further, the other end of the other sub-discharge trigger line or the end of all other sub-discharge trigger lines and the upper discharge electrode or the lower discharge electrode near the end are connected. Between the shortest distance D1 or D2 and the other end of all other sub-discharge trigger lines or the end of all other sub-discharge trigger lines, and the opening of the hermetic cylinder near that end The shortest distance B1 or B2 between the peripheral metallized surface is set longer than 0.5A, preferably longer than 1A. Therefore, the electric charge of a predetermined frequency charged in the capacitor is applied to the upper discharge electrode and the lower discharge electrode, and an arc discharge is repeatedly generated between the discharge generation surface of the upper discharge electrode and the discharge generation surface of the lower discharge electrode. In this case, the other end of all the sub-discharge trigger lines in which the shortest distance D1 is set to be long or the ends of all the sub-discharge trigger lines in which the shortest distance D2 is set to be long, and the end thereof Between the nearby upper discharge electrode or lower discharge electrode, and the other end of all the sub-discharge trigger lines in which the shortest distance B1 is set longer or all the sub-discharges in which the shortest distance B2 is set longer Between the end of the trigger wire and the metallized surface around the opening of the hermetic cylinder near the end, the arc discharge generated between the discharge generation surface of the upper discharge electrode and the discharge generation surface of the lower discharge electrode is reduced. Pioneering, When over arc discharge is likely to occur, it is prevented, is estimated. Here, the shortest distances D, D1, D2, B, and B1 are smaller than the distance A between the discharge generation surface of the upper discharge electrode and the discharge generation surface of the lower discharge electrode.
Or, even if B2 is a short distance of 0.5 to 1A, between the end of the sub-discharge trigger line and the upper discharge electrode or the lower discharge electrode near the end, or the end of the sub-discharge trigger line When,
Prior to the occurrence of an arc discharge between the metallized surface around the opening of the hermetic cylinder near its end, the arc discharge is generated between the discharge generating surface of the upper discharge electrode and the discharge generating surface of the lower discharge electrode. The reason for the occurrence is that the discharge inducing agent for smoothly inducing the arc discharge is applied to the discharge generating surface of the upper discharge electrode and the discharge generating surface of the lower discharge electrode as described above. It is presumed that there is.

As a result, when an electric charge of a predetermined frequency charged in the capacitor is applied to the upper discharge electrode and the lower discharge electrode, a gap is formed between the discharge generation surface of the upper discharge electrode and the discharge generation surface of the lower discharge electrode. It is estimated that an arc discharge having a predetermined voltage with a predetermined pulse width can be repeatedly and stably generated.

[0024]

Next, embodiments of the present invention will be described with reference to the drawings. FIGS. 1 and 2 show a preferred embodiment of the first discharge tube of the present invention. FIG.
Is a development view of the inner wall of the airtight cylinder. Hereinafter, the first discharge tube will be described.

In the discharge tube shown in the figure, all the sub-discharges formed on the inner wall of the hermetic cylinder 10 correspond to the distance A between the discharge generation surface of the upper discharge electrode 20a and the discharge generation surface of the lower discharge electrode 20b. The shortest distance D between both ends of the trigger line 30 and the upper discharge electrode 20a or the lower discharge electrode 20b near the end, and all the sub-discharge trigger lines 30 formed on the inner side wall of the hermetic cylinder 10 And the shortest distance B between the metallized surface 12a or the metallized surface 12b formed on the periphery of the opening at the upper end or lower end of the hermetic cylinder 10 near that end, is in the range of 0.5A to 2A. Within, preferably 1A
It is set within the range of ~ 1.5A. The set ranges of the shortest distances D and B are values derived from various experimental results by the inventor who has been involved in designing and manufacturing the discharge tube for many years.

The rest of the structure is the same as that of the above-described discharge tube shown in FIGS. 12 and 13, and FIGS.
3 shows the experimental results of the discharge tube. In contrast, FIG.
FIG. 7 and FIG. 7 show the experimental results of a discharge tube in which the shortest distances D and B were set outside the above ranges. Hereinafter, the experimental results of FIGS. 2 to 7 will be sequentially described.

In the first discharge tube used in the experiment of FIG. 3, the shortest distances D and B were set to 1A to 1.5A. In this first discharge tube, the charge charged in the capacitor is repeatedly added between the upper discharge electrode 20a and the lower discharge electrode 20b, and the discharge generation surface of the upper discharge electrode 20a and the discharge of the lower discharge electrode 20b. When an arc discharge is repeatedly generated between the discharge surface and the discharge surface of the upper discharge electrode 20a and the discharge generation surface of the lower discharge electrode 20b, a pulse width of 10 msec. , A stable arc discharge having an operating voltage of about -1116 V was repeatedly and regularly generated.

In the first discharge tube used in the experiment of FIG. 4, the shortest distances D and B were set to 2A. In this first discharge tube, the charge charged in the capacitor is repeatedly added between the upper discharge electrode 20a and the lower discharge electrode 20b, and the discharge generation surface of the upper discharge electrode 20a and the discharge of the lower discharge electrode 20b. When an arc discharge is repeatedly generated between the discharge surface and the discharge surface of the upper discharge electrode 20a and the discharge generation surface of the lower discharge electrode 20b, a pulse width of 10 msec. And the operating voltage is about -111
Except for the first arc discharge, a stable arc discharge of 6 V was repeatedly and regularly generated. In addition, the operating voltage of the first arc discharge increased to -1260V.

In the first discharge tube used in the experiment of FIG. 5, the shortest distances D and B were set to 0.5A. This first
In the discharge tube, the electric charge charged in the capacitor is repeatedly added between the upper discharge electrode 20a and the lower discharge electrode 20b, and the discharge generation surface of the upper discharge electrode 20a and the discharge generation surface of the lower discharge electrode 20b When an arc discharge is repeatedly generated during the
a between the discharge generating surface of the lower discharge electrode 20b and the discharge generating surface of the lower discharge electrode 20b. And the operating voltage is about -90
Almost stable arc discharge of 0 V to -1000 V repeatedly and almost regularly occurred.

In the discharge tube used in the experiment of FIG. 6, the shortest distances D and B were set to 0.25A. In this discharge tube, the upper discharge electrode 20a and the lower discharge electrode 20a
b, the electric charge charged in the capacitor is repeatedly added, and an arc discharge is repeatedly generated between the discharge generation surface of the upper discharge electrode 20a and the discharge generation surface of the lower discharge electrode 20b. The operating voltage of the arc discharge repeatedly generated between the discharge generation surface of the discharge electrode 20a and the discharge generation surface of the lower discharge electrode 20b dropped to -940V. This phenomenon occurs prior to the occurrence of arc discharge between the discharge generating surface of the upper discharge electrode 20a and the discharge generating surface of the lower discharge electrode 20b, before the end of the sub-discharge trigger line 30 and the upper portion near the end. Between the discharge electrode 20a or the lower discharge electrode 20b, or its sub-discharge trigger line 30
This indicates that an arc discharge has occurred between the end of the metallized surface 12a and the metallized surface 12b formed on the periphery of the opening of the airtight cylinder 10 near the end.

In the discharge tube used in the experiment of FIG. 7, the shortest distances D and B were set to 3A. In this discharge tube, the charge charged in the capacitor is repeatedly added between the upper discharge electrode 20a and the lower discharge electrode 20b, and the discharge generation surface of the upper discharge electrode 20a0 and the discharge generation surface of the lower discharge electrode 20b are changed. When the arc discharge is repeatedly generated during the operation, the operating voltage of the arc discharge initially generated between the discharge generation surface of the upper discharge electrode 20a and the discharge generation surface of the lower discharge electrode 20b greatly increases to -1400V. It has risen.

From the experimental results of the discharge tube shown in FIGS. 3 to 7, the shortest distances D and B were set to 0.5A to 2A.
And preferably within the range of 1A to 1.5A, the pulse width between the discharge generating surface of the upper discharge electrode 20a and the discharge generating surface of the lower discharge electrode 20b is constant and the operating voltage It can be seen that a constant stable arc discharge can be repeatedly and regularly generated. By the way,
The operating voltage of the arc discharge repeatedly generated between the discharge generation surface of the upper discharge electrode 20a and the discharge generation surface of the lower discharge electrode 20b of the SSG discharge tube is approximately -1000V to-
The discharge tube used in the experiments shown in FIGS. 3 to 5 can be used for SSG.

FIGS. 8 and 9 show a preferred embodiment of the second discharge tube of the present invention. FIG. 8 is a front sectional view thereof, and FIG. 9 is a developed view of the inner wall of the hermetic cylinder. Hereinafter, the second discharge tube will be described.

In the discharge tube shown in the figure, all the sub-discharges formed on the inner wall of the hermetic cylinder 10 correspond to the distance A between the discharge generation surface of the upper discharge electrode 20a and the discharge generation surface of the lower discharge electrode 20b. The shortest distance D between one end of the trigger line 30 and the upper discharge electrode 20a or the lower discharge electrode 20b near the end, and all the sub-discharge triggers formed on the inner wall of the hermetic cylinder 10. The shortest distance B between one end of the line 30 and the metallized surface 12a or 12b formed on the periphery of the opening at the upper end or lower end of the hermetic cylinder 10 near the end is 0.5A. Ａ2A, preferably 1A１1.5A.

The shortest distance D1 between the other end of all other sub-discharge trigger lines 30 and the upper discharge electrode 20a or the lower discharge electrode 20b near the other end.
And the other end of the other sub-discharge trigger line 30 and the metallized surface 12a or metallized surface 12 near the opening at the upper end or lower end of the hermetic cylinder 10 near the end.
The shortest distance B1 between b and b is set to be longer than 0.5A, and preferably longer than 1A.

Others are the same as those of the first embodiment shown in FIGS.
In this second discharge tube, when the same experiment as that of FIGS. 3 to 5 was performed, the experiment result almost the same as that of the first discharge tube described above was performed. was gotten.

FIGS. 10 and 11 show a preferred embodiment of the third discharge tube of the present invention. FIG. 10 is a front sectional view thereof, and FIG. 11 is a developed view of the inner wall of the airtight cylinder. Hereinafter, the third discharge tube will be described.

In the discharge tube shown in the figure, a plurality of sub-tubes formed on the inner wall of the hermetic cylinder 10 correspond to the distance A between the discharge generation surface of the upper discharge electrode 20a and the discharge generation surface of the lower discharge electrode 20b. Some sub-discharge trigger lines 30 of the discharge trigger line 30
And the shortest distance D between at least one side end (in the figure, one side end) and the upper discharge electrode 20a or the lower discharge electrode 20b near the end, and a part thereof The shortest distance B between the end on at least one side of the sub-discharge trigger line 30 and the metallized surface 12a or 12b formed on the periphery of the opening at the upper end or lower end of the hermetic cylinder 10 near the end. Is set in the range of 0.5A to 2A, preferably in the range of 1A to 1.5A.

The shortest distance D2 between the end of all other sub-discharge trigger lines 30 and the upper discharge electrode 20a or the lower discharge electrode 20b near the end, and all other sub-discharges The shortest distance B between the end of the trigger line 30 and the metallized surface 12a or 12b at the periphery of the opening at the upper or lower end of the hermetic cylinder 10 near the end.
2 is set longer than 0.5A, preferably longer than 1A.

Others are the same as those of the first embodiment shown in FIGS.
In this second discharge tube, when the same experiment as that of FIGS. 3 to 5 was performed, the experiment result almost the same as that of the first discharge tube described above was performed. was gotten.

In the first, second or third discharge tube shown in FIG. 1, FIG. 8 or FIG.
a and the lower discharge electrode 20b have a shape close to a hemisphere, but the first, second or third discharge tube of the present invention has an upper discharge electrode 20a and a lower discharge electrode 20b formed into a column or a cone. A discharge tube having a similar shape can also be used, and a discharge tube having the same action as the above-described first, second, or third discharge tube can be provided by using such a discharge tube.

[0042]

As described above, according to the first, second or third discharge tube of the present invention, the electric charge of the predetermined frequency charged in the capacitor between the upper discharge electrode and the lower discharge electrode. , A stable arc discharge with a constant pulse width and a constant operating voltage is repeatedly and stably generated between the discharge generating surface of the upper discharge electrode and the discharge generating surface of the lower discharge electrode to generate regularly. Can be. And
When a charge of a frequency of 50 to 200 Hz charged to a capacitor is applied between the upper discharge electrode and the lower discharge electrode, the discharge occurs between the discharge generation surface of the upper discharge electrode and the discharge generation surface of the lower discharge electrode. A discharge tube suitable for SSG in which arc discharge having an operating voltage of about -1000 V is repeatedly and stably generated can be provided.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a first discharge tube of the present invention.

FIG. 2 is a developed view of the inner wall of the hermetic cylinder of the first discharge tube of the present invention.

FIG. 3 is a view showing experimental results of the first discharge tube of the present invention.

FIG. 4 is a view showing experimental results of the first discharge tube of the present invention.

FIG. 5 is a view showing experimental results of the first discharge tube of the present invention.

FIG. 6 is a diagram showing experimental results of a discharge tube.

FIG. 7 is a view showing experimental results of a discharge tube.

FIG. 8 is a front sectional view of a second discharge tube of the present invention.

FIG. 9 is a developed view of the inner wall of the hermetic cylinder of the second discharge tube of the present invention.

FIG. 10 is a front sectional view of a third discharge tube of the present invention.

FIG. 11 is a development view of the inner wall of the hermetic cylinder of the third discharge tube of the present invention.

FIG. 12 is a front sectional view of a discharge tube.

FIG. 13 is a development view of an inner wall of an airtight cylinder of the discharge tube.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Hermetic cylinder 12a, 12b Metallized surface 20a Upper discharge electrode 20b Lower discharge electrode 22a, 22b Lid 30 Sub-discharge trigger line 32, 34 Discharge trigger line

Claims (6)

[Claims] An upper discharge electrode and a lower discharge electrode are vertically arranged in an airtight cylinder made of an insulator, and lids formed on the upper discharge electrode and the lower discharge electrode have upper and lower ends of the airtight cylinder. The upper and lower openings of the hermetic cylinder are covered with the lid, and the upper discharge electrode is provided at the center of the inner wall of the hermetic cylinder. And a plurality of sub-discharge trigger lines electrically insulated from the lower discharge electrode are formed substantially in parallel, and a sub-discharge trigger line is provided on the inner wall portion of the hermetic cylinder between the plurality of sub-discharge trigger lines. And a discharge tube in which discharge trigger lines electrically connected to the upper discharge electrode and discharge trigger lines electrically connected to the lower discharge electrode are alternately formed. Discharge surface and bottom With respect to the distance A between the discharge generating surface of the discharge electrode and the shortest distance between both ends of all the sub-discharge trigger lines and the upper discharge electrode or the lower discharge electrode near the end, D and the shortest distance B between the ends on both sides of all the sub-discharge trigger lines and the metallized surface near the ends is 0.5A to 2A.
A discharge tube characterized by being in the range of A. 2. The shortest distances D and B are 1A to 1.5.
The discharge tube according to claim 1, wherein the discharge tube is in the range of A. 3. An upper discharge electrode and a lower discharge electrode are vertically arranged opposite to each other in an airtight cylinder made of an insulator, and lids formed on the upper discharge electrode and the lower discharge electrode have upper and lower ends of the airtight cylinder. The upper and lower openings of the hermetic cylinder are covered with the lid, and the upper discharge electrode is provided at the center of the inner wall of the hermetic cylinder. And a plurality of sub-discharge trigger lines electrically insulated from the lower discharge electrode are formed substantially in parallel, and a sub-discharge trigger line is provided on the inner wall portion of the hermetic cylinder between the plurality of sub-discharge trigger lines. And a discharge tube in which discharge trigger lines electrically connected to the upper discharge electrode and discharge trigger lines electrically connected to the lower discharge electrode are alternately formed. Discharge surface and bottom With respect to the distance A between the discharge generating surface of the discharge electrode and one end of all the sub-discharge trigger lines, and the upper discharge electrode or the lower discharge electrode near the end. A shortest distance D, and a shortest distance B between the end on one side of all the sub-discharge trigger lines and the metallized surface near the end is in the range of 0.5A to 2A; The shortest distance D1 between the other end of the other sub-discharge trigger line on the other side and the upper discharge electrode or the lower discharge electrode near the other end, and all other sub-discharge trigger lines The shortest distance B1 between the other end of the discharge trigger line and the metallized surface near the end is 0.5 A
Discharge tube characterized by being longer. 4. The shortest distances D and B are 1A to 1.5.
A, and the shortest distances D1 and B1 are 1A
4. A discharge tube according to claim 3, which is longer. 5. An upper discharge electrode and a lower discharge electrode are vertically arranged in an airtight cylinder made of an insulator, and lids formed on the upper discharge electrode and the lower discharge electrode are provided at upper and lower ends of the airtight cylinder. The upper and lower openings of the hermetic cylinder are covered with the lid, and the upper discharge electrode is provided at the center of the inner wall of the hermetic cylinder. And a plurality of sub-discharge trigger lines electrically insulated from the lower discharge electrode are formed substantially in parallel, and a sub-discharge trigger line is provided on the inner wall portion of the hermetic cylinder between the plurality of sub-discharge trigger lines. And a discharge tube in which discharge trigger lines electrically connected to the upper discharge electrode and discharge trigger lines electrically connected to the lower discharge electrode are alternately formed. Discharge surface and bottom With respect to a distance A between the discharge electrode and the discharge generating surface, at least one end of one of the plurality of sub-discharge trigger lines and the upper portion near the end thereof The shortest distance D between the discharge electrode or the lower discharge electrode,
And the shortest distance B between the end on at least one side of the some sub-discharge trigger lines and the metallized surface near the end is in the range of 0.5A to 2A, The shortest distance D2 between the end of all the sub-discharge trigger lines and the upper discharge electrode or the lower discharge electrode near the end, and the other end of all the sub-discharge trigger lines And a shortest distance B2 between the metallized surface near the end and the metallized surface is longer than 0.5A. 6. The shortest distances D and B are 1A to 1.5.
A, and the shortest distances D2 and B2 are 1A
A discharge tube according to claim 5, which is longer.