JPH0431731Y2 - - Google Patents
Info
- Publication number
- JPH0431731Y2 JPH0431731Y2 JP17969187U JP17969187U JPH0431731Y2 JP H0431731 Y2 JPH0431731 Y2 JP H0431731Y2 JP 17969187 U JP17969187 U JP 17969187U JP 17969187 U JP17969187 U JP 17969187U JP H0431731 Y2 JPH0431731 Y2 JP H0431731Y2
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- metal tube
- electrode shaft
- tube
- diameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229910052751 metal Inorganic materials 0.000 claims description 44
- 239000002184 metal Substances 0.000 claims description 44
- 239000000919 ceramic Substances 0.000 claims description 17
- 238000000034 method Methods 0.000 description 7
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 6
- 229910052708 sodium Inorganic materials 0.000 description 6
- 239000011734 sodium Substances 0.000 description 6
- 238000002788 crimping Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 229910052758 niobium Inorganic materials 0.000 description 3
- 239000010955 niobium Substances 0.000 description 3
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000005219 brazing Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 229910001507 metal halide Inorganic materials 0.000 description 2
- 150000005309 metal halides Chemical class 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- MJGFBOZCAJSGQW-UHFFFAOYSA-N mercury sodium Chemical compound [Na].[Hg] MJGFBOZCAJSGQW-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229910001023 sodium amalgam Inorganic materials 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Discharge Lamp (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Description
【考案の詳細な説明】
〔考案の技術分野〕
本考案は透光性セラミクス発光管を具備するセ
ラミツク放電灯に関する。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a ceramic discharge lamp having a translucent ceramic arc tube.
一般に透光性セラミクス発光管を具備するセラ
ミツク放電灯たとえば高圧ナトリウムランプの発
光管は、第３図に示すように透光性セラミクスた
とえば透光性アルミナセラミクス発光管１の開口
端部を封着剤２を介してニオブ等の金属からなる
閉塞体３で気密に封着し、上記閉塞体３の中央部
を気密に貫通して支持される排気管を兼ねる電力
供給用の金属管４の一端には電極５すなわち電極
コイル７を先端に取着した電極軸６の基端側が固
着され、発光管内には希ガス、水銀、ナトリウム
等が封入されて形成される。なお、上記金属管４
と電極５との固着は、電極軸６の基端側を金属管
４の一端開口部４ａに挿入した後、上記開口部を
外側より圧着変形する方法が一般的である。
Generally, the arc tube of a ceramic discharge lamp, such as a high-pressure sodium lamp, is equipped with a translucent ceramic arc tube, as shown in FIG. At one end of a metal pipe 4 for power supply, which also serves as an exhaust pipe, is airtightly sealed with a closure body 3 made of metal such as niobium through a pipe 2, and is supported by passing through the center of the closure body 3 in an airtight manner. The proximal end side of an electrode shaft 6 having an electrode 5, that is, an electrode coil 7 attached to the tip thereof, is fixed, and a rare gas, mercury, sodium, etc. are sealed in the arc tube. In addition, the metal pipe 4
The electrode 5 is generally fixed to the electrode 5 by inserting the proximal end of the electrode shaft 6 into an opening 4a at one end of the metal tube 4, and then pressing and deforming the opening from the outside.
ところで、上記金属管４の発光管外へ導出され
る他端開口部４ｃは油圧式カツター等で気密に圧
着切断されるが、この操作を容易にするためその
肉厚は400W，700W程度のランプでは通常0.5mm
程度の薄肉に形成される上に、更に固着される側
の電極軸６は非常に硬度の高いタングステン金属
が使用される関係上、圧着だけでは両者の固着が
充分でないばかりでなく、強く圧着しすぎると電
極軸６および金属管４に折れや亀裂を生じること
がある。しかも、固着面積が狭い上に、固着面積
に変動を生じ易い等の問題がある。これ等の問題
点は比較的電極が小さく電流値の少ない上記
700W程度の低ワツトタイプのランプにおいては、
特に重大な支障をきたすことは少ないが、これが
例えば4kWのような大電流の高ワツトタイプに
なると必然的に電極形状も大きく、かつ重量も上
記従来の約７倍にもなるので、ランプ輸送時等の
振動で、電極固着部にゆるみを生じるのみなら
ず、甚々しい時には電極が曲つたり、落下する等
の事故を生じ短寿命となることがある。 Incidentally, the opening 4c at the other end of the metal tube 4 leading out of the arc tube is hermetically crimped and cut with a hydraulic cutter or the like, but in order to facilitate this operation, the wall thickness is set to 400W or 700W lamps. Usually 0.5mm
Since the electrode shaft 6 on the side to be fixed is made of extremely hard tungsten metal, not only is the electrode shaft 6 not sufficiently fixed by crimping alone, but it also requires strong crimping. If too much is used, the electrode shaft 6 and metal tube 4 may be bent or cracked. Moreover, there are problems such as the fixed area is narrow and the fixed area tends to fluctuate. The problem with these is that the electrodes are relatively small and the current value is low.
For low wattage type lamps of around 700W,
Although it is unlikely to cause a particularly serious problem, if this becomes a high-current, high-wattage type such as 4 kW, the electrode shape will inevitably be larger and the weight will be about seven times that of the conventional one, so when transporting the lamp, etc. The vibrations not only cause the electrode fixing part to loosen, but in severe cases, the electrode may bend or fall, resulting in a shortened lifespan.
しかも、電極固着部にゆるみが生じると、点灯
時にこの部分が異常に発熱し、ランプ特性を決め
る最冷部温度に著しい影響を与える結果、ランプ
特性に大きな変動をもたらすとか、あるいは電極
固着部の金属管が溶断して電極の落下という重大
事故を発生する原因ともなる。 Moreover, if the electrode fixing part becomes loose, this part will generate abnormal heat during lighting, which will significantly affect the temperature of the coldest part that determines the lamp characteristics, resulting in large fluctuations in lamp characteristics, or the electrode fixing part will become loose. This can also cause serious accidents such as the metal tube melting down and the electrode falling.
また、別の電極固着方法としてはろう付け、溶
着等の方法もあるが、ろう付け法ではフラツクス
による固着部の腐蝕があり、また両方とも加熱は
酸化防止のため真空雰囲気で行なわねばならない
等の制約があり、工程が複雑になつてコストが高
くなる欠点がある。 In addition, there are other electrode fixing methods such as brazing and welding, but the brazing method causes corrosion of the fixed part due to flux, and both methods require heating in a vacuum atmosphere to prevent oxidation. There are limitations, and the disadvantage is that the process becomes complicated and costs increase.
上記各欠点に対処して、本考案者等は先に第４
図に示すような金属管に電極軸を螺合することに
よつて電極を取り付ける手段を開発し提案した
（実願昭57−157038号）。 In order to address each of the above-mentioned drawbacks, the present inventors have previously developed a fourth
We developed and proposed a method for attaching electrodes by screwing the electrode shaft onto a metal tube as shown in the figure (Utility Application No. 157038/1982).
図において１は透光性セラミクス発光管、３は
発光管の開口端部を封止する閉塞体、４は閉塞体
３を気密に貫通して支持される電力供給用の金属
管で、その一端開口部内面にはねじ溝４ｂが設け
られ、このねじ溝４ｂに電極軸６の基端部６ｂ周
面に設けたねじ山６ｃを螺合することによつて、
電極５を金属管４には固着支持させている。 In the figure, 1 is a translucent ceramic arc tube, 3 is a closure body that seals the open end of the arc tube, and 4 is a metal tube for power supply that is supported by passing through the closure body 3 in an airtight manner, one end of which is A thread groove 4b is provided on the inner surface of the opening, and by screwing into this thread groove 4b a thread 6c provided on the circumferential surface of the base end 6b of the electrode shaft 6,
The electrode 5 is firmly supported on the metal tube 4.
このような手段は上記各欠点を解消する点で極
めて有効ではあつたが、それでもなお下記のよう
な不満足な点があることが判った。各作業者に
よつて電極の金属管へのねじ込み具合が異なり、
このため電極の高さにバラツキを生じてランプ特
性が不均一となることがある。ねじ込み具合が
一定化しないため、ねじ込み過ぎて金属管に亀裂
を生じたり、あるいは逆にねじ込みが不足してゆ
るみを生じて螺合部が発熱し、特性変動や電極の
曲りおよび落下等を生じることも皆無ではなかつ
た。電極が大形で電極軸径が太くなるに従い、
金属管もまた太くする必要があることから油圧式
カツタによる金属管他端側の気密切断が難かしく
なり、気密漏れを生じることもあつた。 Although such means were extremely effective in eliminating the above-mentioned drawbacks, it was found that there were still some unsatisfactory points as described below. The way the electrode is screwed into the metal tube varies depending on the worker.
This may cause variations in the height of the electrodes, resulting in non-uniform lamp characteristics. Because the degree of screwing is not constant, over-screwing can cause cracks in the metal tube, or conversely, insufficient screw-in can cause loosening, which generates heat in the threaded part, causing characteristic fluctuations, bending and falling of the electrode, etc. There were also quite a few. As the electrode becomes larger and the electrode shaft diameter becomes thicker,
Since the metal tube also needs to be thick, it is difficult to cut the other end of the metal tube in an airtight manner using a hydraulic cutter, which sometimes causes airtight leakage.
（考案が解決しようとする問題点）
上記のように従来の電極を螺合によつて金属管
に固着する手段は、優れた効果を挙げることがで
きたが、それでもなお、作業者によるバラツキが
あつたり、また電極が大形化するとそれに応じて
金属管も太いものを使用する必要があるとか、あ
るいは太い金属管はその一端側を圧着切断する工
程で気密漏れが発生することもある等の欠点があ
つた。(Problems to be solved by the invention) As mentioned above, the conventional method of fixing the electrode to the metal tube by screwing has been able to produce excellent effects, but it still suffers from variations depending on the operator. In addition, as the electrode becomes larger, it is necessary to use a thicker metal tube, or the process of crimping and cutting one end of a thick metal tube may cause an airtight leak. There were flaws.
そこで、本考案は上記従来の欠点を解消するも
のであつて、電極を螺合によつて金属管に固着支
持させる場合に作業者による製品のバラツキが小
さく、しかも電極の電極軸径が変つても金属管管
径を変える必要がない作業性に優れたセラミツク
放電灯を提供することを目的とする。 Therefore, the present invention solves the above-mentioned drawbacks of the conventional method, and is designed to reduce the variation in product quality depending on the operator when the electrode is fixedly supported on the metal tube by screwing, and also to reduce the variation in the product due to the change in the electrode shaft diameter of the electrode. Another object of the present invention is to provide a ceramic discharge lamp with excellent workability that does not require changing the diameter of the metal tube.
（問題点を解決するための手段）
本考案のセラミツク放電灯は、透光性セラミク
ス発光管の開口端部を封止する閉塞体に支持され
る金属管の一端に電極軸を螺合することによつて
電極を固着支持させると共に、上記電極軸のねじ
部を設けた基端側の径を、それより先端側の径よ
りも細くして、基端側と先端側との境界に段部を
形成するように構成される。
(Means for Solving the Problems) The ceramic discharge lamp of the present invention has an electrode shaft screwed onto one end of a metal tube supported by a closure body that seals the open end of a translucent ceramic arc tube. At the same time, the diameter of the proximal end where the threaded portion of the electrode shaft is provided is made smaller than the diameter of the distal end, and a step is formed at the boundary between the proximal end and the distal end. configured to form a
（作用）
上記構成によれば、電極軸の金属管へのねじ込
み深さは、電極軸の基端側と先端側の境界に設け
た段部がストツパーの役目を果たすことによつて
容易に、かつ一定に規制できるので、作業者に起
因する製品のバラツキは極めて小さくすることが
できるし、また電極の大きさが変わり電極軸の太
さが変わる場合でも、ねじ部を設ける電極軸の基
端側は細径とするので、太い金属管をわざわざ使
用する必要がなく、したがつて、金属管の他端側
を油圧式カツタによつて切断する場合でも、切断
部に気密漏れが生じるようなこともなく、優れた
作業性が得られる。しかも、金属管と電極とは螺
合によつて固着するので、固着強度は極めて強固
なものとなる。(Function) According to the above configuration, the screwing depth of the electrode shaft into the metal tube can be easily adjusted by the stepped portion provided at the boundary between the proximal end and the distal end of the electrode shaft serving as a stopper. Since it can be regulated to a constant level, product variations caused by the operator can be extremely minimized.Also, even if the size of the electrode changes and the thickness of the electrode shaft changes, the threaded part can be provided at the base end of the electrode shaft. Since the side has a small diameter, there is no need to take the trouble to use a thick metal tube. Therefore, even when cutting the other end of the metal tube with a hydraulic cutter, there is no need to use a hydraulic cutter to prevent air leakage from occurring at the cut section. Excellent workability can be obtained without any problems. Moreover, since the metal tube and the electrode are fixed by screwing together, the fixing strength is extremely strong.
（実施例）
以下、図面に示した一実施例に基づいて本考案
を詳細に説明する。第１図は4kW級の高圧ナト
リウムランプ発光管の一部切欠断面図、第２図は
同発光管の一端部側の拡大縦断面図を示す。１は
内径26mm、管長300mmの透光性セラミクス、例え
ば透光性アルミナセラミクスからなる発光管で、
その開口端部は例えばAl2O3CaO，MgO等を主成
分とするガラスソルダのような封着剤２を介して
アルミナセラミクスと熱膨張率が近似する、例え
ばニオブ金属からなる厚さ約0.3mmの閉塞体３，
３により気密に封止されている。４，４は上記閉
塞体３，３の中央部を気密に貫通して支持され、
必要に応じては排気管としての役目も兼ねる内径
約5.6mmの例えばニオブ金属からなる電力供給用
の金属管で、その一端開口部４ａの内周面にはね
じ溝４ｂを設けて、電極５を螺合により固着支持
し、一方、他端側４ｃは油圧式カツターで気密に
圧着切断されている。上記電極５は径８mmのタン
グステン製電極軸６の先端側６ａに線径１mmのタ
ングステン線からなるコイル７を巻装してなり、
電極軸６の基端側６ｂは周面にねじ山６ｃを設
け、その最大径は上記先端側６ａよりも細い６mm
に形成したので基端側６ｂと先端側６ａとの境界
には段部８が形成されている。また、発光管内に
は始動用希ガスとして例えば20トールのアルゴン
ガス、ナトリウム20重量％のナトリウムアマルガ
ム360mgが封入され、この発光管は図示しないが
内部を真空とした外管内に封袋されて定格出力
4kWの高圧ナトリウムランプを構成し、点灯時
のランプ電圧は220V、ランプ電流は20Aに設定
される。(Example) Hereinafter, the present invention will be described in detail based on an example shown in the drawings. Figure 1 is a partially cutaway cross-sectional view of a 4kW class high-pressure sodium lamp arc tube, and Figure 2 is an enlarged longitudinal cross-sectional view of one end of the arc tube. 1 is an arc tube made of translucent ceramics, such as translucent alumina ceramics, with an inner diameter of 26 mm and a tube length of 300 mm.
The open end is made of, for example, niobium metal, which has a coefficient of thermal expansion similar to that of alumina ceramics, and has a thickness of about 0.3 through a sealing agent 2 such as glass solder whose main component is Al 2 O 3 CaO, MgO, etc. mm occlusion body 3,
3, hermetically sealed. 4, 4 are supported by airtightly penetrating the central part of the closing bodies 3, 3,
A metal tube for power supply made of niobium metal, for example, with an inner diameter of about 5.6 mm, which also serves as an exhaust pipe if necessary, is provided with a threaded groove 4b on the inner peripheral surface of an opening 4a at one end, and the electrode 5 is are firmly supported by screwing together, while the other end 4c is hermetically crimped and cut using a hydraulic cutter. The electrode 5 is formed by winding a coil 7 made of tungsten wire with a wire diameter of 1 mm around the tip end 6a of a tungsten electrode shaft 6 with a diameter of 8 mm.
The proximal end 6b of the electrode shaft 6 has a thread 6c on its circumferential surface, the maximum diameter of which is 6 mm narrower than the distal end 6a.
Therefore, a stepped portion 8 is formed at the boundary between the proximal end side 6b and the distal end side 6a. In addition, the arc tube is filled with, for example, 20 torr of argon gas and 360 mg of sodium amalgam containing 20% sodium as a starting rare gas.Although not shown, the arc tube is sealed in an outer tube with a vacuum inside and rated. output
It consists of a 4kW high-pressure sodium lamp, with a lamp voltage of 220V and a lamp current of 20A when lit.
このような構成によれば、電極５とこれを支持
する金属管４とは螺合によつて固着されるので、
単に圧接固着した従来のものより固着強度がはる
かに強固となるばかりでなく、電極のねじ山６ｃ
を金属管のねじ溝４ｂにねじ込む作業も、電極軸
６に設けた段部８がストツパーの役目をし、金属
管４の端面が上記段部８に当接するまでねじ込め
ば良いわけであるから、熟練を必要とせず、作業
者による電極５高さのバラツキ、ねじ込み過ぎに
よる金属管４の亀裂発生、ねじ込み不足によるゆ
るみ等が容易に防止できる。 According to such a configuration, the electrode 5 and the metal tube 4 that supports it are fixed by screwing, so that
Not only is the adhesion strength much stronger than the conventional one, which is simply press-bonded, but the electrode thread 6c
When screwing into the thread groove 4b of the metal tube, the step 8 provided on the electrode shaft 6 acts as a stopper, and it is sufficient to screw the metal tube 4 until the end surface comes into contact with the step 8. This does not require any skill, and it is possible to easily prevent variations in the height of the electrode 5 caused by the operator, cracks in the metal tube 4 due to over-screwing, loosening due to insufficient screw-in, etc.
すなわち、異なる作業者により製作されたラン
プについて、外観検査およびランプ特性の測定を
実施した結果、ランプ特性においては各値とも設
計値に対し、許容変動範囲内に納まつて問題な
く、また外観的にも金属管と電極との固着部のゆ
るみによる溶断、電極の曲りや落下、あるいはね
じ込み過ぎによる金属管の亀裂発生等は全く認め
られなかつた。 In other words, as a result of visual inspection and measurement of lamp characteristics for lamps manufactured by different workers, each value of lamp characteristics was within the allowable variation range with respect to the design value, and there were no problems in terms of appearance. In addition, no fusing due to loosening of the fixed portion between the metal tube and the electrode, bending or falling of the electrode, or cracking of the metal tube due to over-screwing were observed.
さらに、異なる電力のランプにおいて、電極の
大きさが変わり、電極軸の太さが変わる場合で
も、ねじ部を設ける電極軸の基端側は細径とする
ので、太い金属管をわざわざ使用する必要がない
し、このことはまた金属管の他端側を例えば油圧
式カツタによつて切断する場合の気密漏れ防止の
点からも好ましい。 Furthermore, even if the size of the electrode changes and the thickness of the electrode shaft changes in lamps with different power, the proximal end of the electrode shaft where the threaded part is provided has a small diameter, so there is no need to take the trouble to use a thick metal tube. This is also preferable from the viewpoint of airtight leakage prevention when the other end of the metal tube is cut by, for example, a hydraulic cutter.
なお、本考案は上記実施例に限らず、金属製閉
塞体の代りにセラミツクス製閉塞体を使用した場
合にも適用できるし、また、発光管内封入物とし
ての他の種類の物、例えば金属ハロゲン化物を封
入したメタルハライドランプ等の他のセラミツク
放電灯においても同様の効果が得られる。 Note that the present invention is not limited to the above-mentioned embodiments, but can also be applied to cases where a ceramic closure is used instead of a metal closure, and other types of materials such as metal halides can be used as the filler in the arc tube. Similar effects can be obtained with other ceramic discharge lamps such as metal halide lamps filled with oxides.
以上述べたように本考案の構成によれば、セラ
ミクス発光管の開口部を封止する閉塞体に支持さ
れる電力供給用の金属管に電極を螺合によつて強
固に固着する工程を容易、かつ確実にすることに
よつて作業者に起因する製品のバラツキを防止で
き、しかもランプ電力の相違によつて電極の大き
さが変わり、これに付随して電極軸径が変わつて
も、電極軸を螺合して固着支持する金属管の管径
は変える必要が無いため作業性が向上すると共
に、上記金属管の圧着切断時に気密漏れも生じに
くいセラミツク放電灯を得ることができる。
As described above, the configuration of the present invention facilitates the process of firmly fixing the electrode to the metal tube for power supply supported by the closure body that seals the opening of the ceramic arc tube. , and by ensuring that product variations caused by workers are prevented, and even if the electrode size changes due to differences in lamp power and the electrode shaft diameter changes accordingly, the electrode Since there is no need to change the diameter of the metal tube to which the shaft is screwed and fixedly supported, work efficiency is improved, and a ceramic discharge lamp can be obtained in which airtight leakage is less likely to occur when the metal tube is crimped and cut.
第１図は本考案の一実施例である高圧ナトリウ
ムランプ発光管の一部切欠縦断面図、第２図は同
発光管の一端部側の拡大縦断面図、第３図および
第４図はそれぞれ異なる従来ランプ発光管の一端
部側の縦断面図を示す。
１……発光管、２……封着剤、３……閉塞体、
４……金属管、４ａ……金属管の一端開口部、４
ｂ……金属管に設けたねじ溝、５……電極、６…
…電極軸、６ａ……電極軸の先端側、６ｂ……電
極軸の基端側、６ｃ……電極軸のねじ山、８……
段部。
FIG. 1 is a partially cutaway vertical cross-sectional view of a high-pressure sodium lamp arc tube that is an embodiment of the present invention, FIG. 2 is an enlarged vertical cross-sectional view of one end of the same arc tube, and FIGS. 3 and 4 are 1A and 1B are longitudinal cross-sectional views of one end side of different conventional lamp arc tubes, respectively. 1... Arc tube, 2... Sealing agent, 3... Closure body,
4...Metal tube, 4a...One end opening of metal tube, 4
b... Thread groove provided in the metal tube, 5... Electrode, 6...
...Electrode shaft, 6a...Distal end side of the electrode shaft, 6b...Proximal end side of the electrode shaft, 6c...Threaded thread of the electrode shaft, 8...
Danbe.
Claims (1)
閉塞体に支持される金属管の一端に、電極軸を螺
合することによつて電極を固着支持させたセラミ
ツク放電灯において、上記電極軸のねじ部を設け
た基端側の径を、それより先端側の径よりも細く
して、基端側と先端側との境界に段部が形成され
るようにしたことを特徴とするセラミツク放電
灯。 In a ceramic discharge lamp in which an electrode is fixedly supported by screwing an electrode shaft to one end of a metal tube supported by a closing body that seals the open end of the translucent ceramic arc tube, the electrode shaft is The diameter of the proximal end where the threaded portion is provided is made smaller than the diameter of the distal end, so that a stepped portion is formed at the boundary between the proximal end and the distal end. discharge lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17969187U JPH0431731Y2 (en) | 1987-11-27 | 1987-11-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17969187U JPH0431731Y2 (en) | 1987-11-27 | 1987-11-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0186061U JPH0186061U (en) | 1989-06-07 |
| JPH0431731Y2 true JPH0431731Y2 (en) | 1992-07-30 |
Family
ID=31471237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17969187U Expired JPH0431731Y2 (en) | 1987-11-27 | 1987-11-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0431731Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7839089B2 (en) * | 2002-12-18 | 2010-11-23 | General Electric Company | Hermetical lamp sealing techniques and lamp having uniquely sealed components |
-
1987
- 1987-11-27 JP JP17969187U patent/JPH0431731Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0186061U (en) | 1989-06-07 |
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