JPH0594764A - Discharge lamp - Google Patents
Discharge lampInfo
- Publication number
- JPH0594764A JPH0594764A JP25518291A JP25518291A JPH0594764A JP H0594764 A JPH0594764 A JP H0594764A JP 25518291 A JP25518291 A JP 25518291A JP 25518291 A JP25518291 A JP 25518291A JP H0594764 A JPH0594764 A JP H0594764A
- Authority
- JP
- Japan
- Prior art keywords
- external lead
- lead wire
- arc tube
- power supply
- wire
- 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.)
- Granted
Links
Landscapes
- Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は自動車用ヘッドランプ等
に用いる放電ランプに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge lamp used for automobile headlamps and the like.
【０００２】[0002]
【従来の技術】従来、この種の放電ランプにおいては、
円筒状口金を用い、その内部に両開口から発光管の外部
リード線および高耐圧被覆電線からなる絶縁被覆電線を
位置させ、外部リード線と絶縁被覆電線とを各々接続し
ている。そして、その接続部間での絶縁破壊を防止する
ために、発光管側の口金内部にシリコンゴムを充填し、
さらに放電ランプの動程中にシリコンゴムから放出され
るガスが発光管の表面に付着して発光管材料である石英
ガラスが白濁するのを防止するために、シリコンゴムの
表面を耐熱性無機セメントで被覆している。2. Description of the Related Art Conventionally, in this type of discharge lamp,
A cylindrical base is used, and an outer lead wire of the arc tube and an insulation-coated electric wire composed of a high-voltage coated electric wire are located inside the both openings, and the outer lead wire and the insulation-coated electric wire are connected to each other. Then, in order to prevent dielectric breakdown between the connection parts, silicone rubber is filled inside the base of the arc tube,
Furthermore, in order to prevent the gas released from the silicone rubber from adhering to the surface of the arc tube during the travel of the discharge lamp, and preventing the quartz glass, which is the material of the arc tube, from becoming cloudy, the surface of the silicone rubber is made of heat-resistant inorganic cement. It is covered with.
【０００３】ところが、このような従来の放電ランプに
おいて、シリコンゴムの表面を覆う耐熱性無機セメント
では完全な気密性が得られないために、放電ランプの動
程中にシリコンゴムから放出されるガスが発光管の表面
に付着し、発光管材料である石英ガラスの高温部が再結
晶化し光束が減衰するという問題を十分に防止すること
ができなかった。However, in such a conventional discharge lamp, since the gas-tightness of the heat-resistant inorganic cement covering the surface of the silicone rubber cannot be obtained, the gas released from the silicone rubber during the operation of the discharge lamp. However, it was not possible to sufficiently prevent the problem that the particles adhere to the surface of the arc tube and the high temperature part of the quartz glass that is the material of the arc tube is recrystallized and the luminous flux is attenuated.
【０００４】[0004]
【発明が解決しようとする課題】そこで、発明者は円筒
状口金内にその軸と直交する方向に仕切壁を設け、発光
管と反対側の口金凹部内にシリコンゴムを充填した構造
の放電ランプについて検討した。すなわち、口金の仕切
壁の反発光管側に一対の円筒状金属端子を固着し、それ
ぞれの金属端子に一方の外部リード線、および他方の外
部リード線に接続された電力供給線を挿通し、それぞれ
の円筒状金属端子を両先端部より少し下側を切断して金
属端子の切口部に厚肉部を生じさせ、この厚肉部によっ
て、金属端子と外部リード線および電力供給線との各々
の隙間を塞ぐようにし、それらの金属端子に、円盤状蓋
の穴に挿通した絶縁被覆電線のそれぞれ一端側を接続
し、他端側を口金外部に引き出したのち、反発光管側の
口金凹部内にシリコンゴムを充填し、円盤状蓋で塞いだ
構造の放電ランプを製作して検討した。しかしながら、
このような構成でも、円筒状金属端子と外部リード線お
よび電力供給線との隙間を完全に塞ぐことが難しいため
に、シリコンゴムから放出されたガスがその隙間を通り
発光管の表面に付着し、発光管が再結晶化して白濁する
ことにより、光束が減衰するという問題を完全に防止す
ることができなかった。Therefore, the inventor has provided a discharge lamp having a structure in which a partition wall is provided in a cylindrical base in a direction orthogonal to the axis thereof, and a silicon rubber is filled in a recess of the base opposite to the arc tube. Was examined. That is, a pair of cylindrical metal terminals are fixed to the anti-emission tube side of the partition wall of the base, one external lead wire is inserted into each metal terminal, and the power supply wire connected to the other external lead wire is inserted, Cut each cylindrical metal terminal slightly below both tips to create a thick portion at the cut portion of the metal terminal, and this thick portion causes each of the metal terminal, the external lead wire and the power supply wire to To the metal terminals, connect one end of each of the insulation-coated wires inserted in the holes of the disk-shaped lid, and pull out the other end to the outside of the base. A discharge lamp having a structure in which the inside was filled with silicone rubber and the disk-shaped lid was closed was manufactured and studied. However,
Even with such a configuration, it is difficult to completely close the gap between the cylindrical metal terminal and the external lead wire and the power supply line.Therefore, the gas released from the silicon rubber passes through the gap and adheres to the surface of the arc tube. However, it was not possible to completely prevent the problem that the luminous flux is attenuated due to re-crystallization and white turbidity of the arc tube.
【０００５】本発明は発光管の表面にシリコンゴムから
放出されるガスが付着するのを防ぎ、光束維持率の低下
を抑制することのできる放電ランプを提供するものであ
る。The present invention provides a discharge lamp capable of preventing the gas emitted from the silicone rubber from adhering to the surface of the arc tube and suppressing the reduction of the luminous flux maintenance factor.
【０００６】[0006]
【課題を解決するための手段】本発明の放電ランプは、
一端側に発光管が支持され、他端側の凹部内に一対の筒
状金属端子の一端部が固着された口金を備え、前記発光
管の一方の外部リード線、および他方の外部リード線に
接続された電力供給線を前記金属端子にそれぞれ挿通
し、前記金属端子の両他端部を溶融閉塞して前記一方の
外部リード線および前記電力供給線に接続し、前記絶縁
被覆電線を前記金属端子にそれぞれ接続して前記口金外
に引き出し、前記口金の凹部内の前記金属端子と前記絶
縁被覆電線との接続部を埋設するようにこの凹部内にシ
リコンゴムを充填したものである。DISCLOSURE OF THE INVENTION The discharge lamp of the present invention comprises:
An arc tube is supported on one end side, and a cap having one end portions of a pair of cylindrical metal terminals fixed in a concave portion on the other end side is provided, and one external lead wire of the arc tube and the other external lead wire are provided. The connected power supply wires are respectively inserted into the metal terminals, both ends of the metal terminals are melted and closed to connect to the one external lead wire and the power supply wire, and the insulation-coated electric wire is connected to the metal. Each of the terminals is connected to each other and drawn out of the base, and the recess is filled with silicone rubber so as to bury the connection between the metal terminal and the insulating coated electric wire in the recess.
【０００７】[0007]
【作用】本発明によると、発光管の一方の外部リード線
および電力供給線を筒状金属端子にそれぞれ挿通し、こ
の金属端子の両他端部を溶融閉塞することにより、金属
端子と一方の外部リード線および電力供給線を接続して
いるので、放電ランプの動程中にシリコンゴムからの放
出ガスが筒状金属端子と発光管外部リード線および電力
供給線との隙間を通して発光管側に洩れることがなくこ
れによって発光管表面の再結晶化を防止できる。According to the present invention, one of the external lead wire and the power supply wire of the arc tube is inserted into the tubular metal terminal, and the other end portions of the metal terminal are melted and closed to thereby close the metal terminal and the one end. Since the external lead wire and power supply line are connected, the gas released from the silicone rubber during the discharge lamp travels to the arc tube side through the gap between the cylindrical metal terminal and the arc tube external lead wire and power supply line. Without leaking, recrystallization of the surface of the arc tube can be prevented.
【０００８】[0008]
【実施例】以下、本発明の実施例について図面を用いて
説明する。Embodiments of the present invention will be described below with reference to the drawings.
【０００９】図１に示すように、本発明実施例のメタル
ハライドランプは、発光管１と口金２とを主要部とす
る。発光管１は石英ガラス管の両端に電極３，４を封着
し、内部にキセノン、水銀とともに、ナトリウム、スカ
ンジウム等の発光金属をハロゲン化物の形で封入してい
る。合成樹脂、例えばＰＰＳ（ポリフェニレンサルファ
イド）からなる口金本体５と、この口金本体５にとりつ
けられた合成樹脂製の円筒体６と、この円筒体６の開口
を塞ぐ合成樹脂製の円盤状の蓋７とからなっており、そ
の内部に凹部８が形成されている。口金本体５の一端側
には発光管１の一端部が発光管支持板１９，２０で強固
に支持され、他端側には一対の円筒状金属端子９，１０
の一端部が植設されている。金属端子９，１０には発光
管１の外部リード線１１、および外部リード線１２に接
続された電力供給線１３が挿通されている。電力供給線
１３にはセラミックスリーブ１８がかぶせられている。
金属端子９，１０の他端部は、プラズマ溶接等により溶
融閉塞されて外部リード線１１および電力供給線１３が
接続されている。金属端子９，１０には高耐圧の絶縁被
覆電線１４，１５が接続されている。そして、口金２の
凹部８内には、金属端子９，１０と絶縁被覆電線１４，
１５との各々の接続部を覆うようにシリコンゴム１６が
充填されている。絶縁被覆電線１４，１５は蓋７に設け
られた穴を貫通して口金２外に引き出されている。蓋７
は口金全体５にねじ１７（図２，３参照）等で固着され
て円筒体６の開口を塞いでいる。凹部８内へのシリコン
ゴム１６の充填は、この凹部８内に露出している導電金
属部間の絶縁耐圧を確保するために必要で、シリコンゴ
ム１６を用いないと導電金属部間の沿面距離を十分長く
とらなければならず口金本体５が極めて大きなものにな
ってしまう。スクリーンキャップ２１は発光管側口金本
体５に取り付けられる。As shown in FIG. 1, the metal halide lamp according to the embodiment of the present invention mainly includes an arc tube 1 and a base 2. In the arc tube 1, electrodes 3 and 4 are sealed at both ends of a quartz glass tube, and a light emitting metal such as sodium and scandium in the form of halide is sealed inside together with xenon and mercury. A base body 5 made of a synthetic resin such as PPS (polyphenylene sulfide), a synthetic resin cylinder 6 attached to the base body 5, and a synthetic resin disc-shaped lid 7 for closing the opening of the cylinder body 6. And the concave portion 8 is formed inside thereof. One end of the arc tube 1 is firmly supported by the arc tube support plates 19 and 20 at one end of the base body 5, and a pair of cylindrical metal terminals 9 and 10 is provided at the other end.
One end of is planted. An external lead wire 11 of the arc tube 1 and a power supply line 13 connected to the external lead wire 12 are inserted through the metal terminals 9 and 10. The power supply line 13 is covered with a ceramic sleeve 18.
The other ends of the metal terminals 9 and 10 are melted and closed by plasma welding or the like to connect the external lead wire 11 and the power supply wire 13. High-voltage insulating coated electric wires 14 and 15 are connected to the metal terminals 9 and 10. Then, in the recess 8 of the base 2, the metal terminals 9 and 10 and the insulation-coated electric wire 14,
Silicon rubber 16 is filled so as to cover each connection portion with 15. The insulation-coated electric wires 14 and 15 penetrate through holes provided in the lid 7 and are drawn out of the base 2. Lid 7
Is fixed to the entire base 5 with screws 17 (see FIGS. 2 and 3) or the like to close the opening of the cylindrical body 6. Filling the recess 8 with the silicon rubber 16 is necessary to secure the dielectric strength between the conductive metal portions exposed in the recess 8. If the silicon rubber 16 is not used, the creepage distance between the conductive metal portions is increased. Must be sufficiently long, and the cap body 5 becomes extremely large. The screen cap 21 is attached to the arc tube side base body 5.
【００１０】以上のように、本発明実施例のメタルハラ
イドランプは、発光管１の外部リード線１１および電力
供給線１３を円筒状金属端子９，１０に挿通し、金属端
子９，１０の両他端部を溶融閉塞することにより、発光
管１とシリコンゴム１６とを気密的に隔離することがで
き、それによってシリコンゴム１６から放出されるガス
で発光管１が白濁することを防ぐことができる。また、
シリコンゴム１６を用いることによって、口金本体５が
大きくなるのを回避することができる。As described above, in the metal halide lamp of the embodiment of the present invention, the external lead wire 11 and the power supply wire 13 of the arc tube 1 are inserted into the cylindrical metal terminals 9 and 10, and both the metal terminals 9 and 10 are inserted. By melting and closing the end portion, the arc tube 1 and the silicon rubber 16 can be airtightly isolated from each other, and thereby the arc tube 1 can be prevented from being clouded by the gas released from the silicon rubber 16. . Also,
By using the silicone rubber 16, it is possible to prevent the base body 5 from becoming large.
【００１１】[0011]
【発明の効果】以上説明したように、本発明によれば、
ランプ動程中にシリコンゴムから放出されるガスによっ
て発光管の石英ガラス表面が再結晶化して白濁すること
がなく、光束維持率の低下を抑制することができる放電
ランプを提供することができる。As described above, according to the present invention,
It is possible to provide a discharge lamp in which the surface of the quartz glass of the arc tube does not recrystallize and becomes cloudy due to the gas released from the silicon rubber during the lamp travel, and a decrease in luminous flux maintenance factor can be suppressed.
【図１】本発明の一実施例である放電ランプの一部切欠
正面図FIG. 1 is a partially cutaway front view of a discharge lamp according to an embodiment of the present invention.
【図２】同じく底面図[Fig. 2] Similarly, bottom view
【図３】同じく分解斜視図FIG. 3 is an exploded perspective view of the same.
１ 発光管 ２ 口金 ８ 凹部 ９，１０ 金属端子 １１，１２ 外部リード線 １３ 電力供給線 １４，１５ 絶縁被覆電線 １６ シリコンゴム DESCRIPTION OF SYMBOLS 1 arc tube 2 base 8 recess 9 and 10 metal terminal 11 and 12 external lead wire 13 power supply wire 14 and 15 insulation coating electric wire 16 silicon rubber
Claims (1)
部内に一対の筒状金属端子の一端部が固着された口金を
備え、前記発光管の一方の外部リード線、および他方の
外部リード線に接続された電力供給線を前記金属端子に
それぞれ挿通し、前記金属端子の両他端部を溶融閉塞し
て前記一方の外部リード線および前記電力供給線に接続
し、前記絶縁被覆電線を前記金属端子にそれぞれ接続し
て前記口金外に引き出し、前記口金の凹部内の前記金属
端子と前記絶縁被覆電線との接続部を埋設するようにこ
の凹部内にシリコンゴムを充填したことを特徴とする放
電ランプ。1. An arc tube is supported on one end side, and a base having a pair of cylindrical metal terminals to which one end sections are fixedly attached is provided in a recess on the other end side, and one external lead wire of the arc tube and the other. The power supply wires connected to the external lead wires are inserted into the metal terminals respectively, and the other end portions of the metal terminals are melted and closed to be connected to the one external lead wire and the power supply wire, and the insulation A covered electric wire is connected to each of the metal terminals and pulled out of the cap, and silicon rubber is filled in the recess so as to bury a connecting portion between the metal terminal and the insulating covered electric wire in the recess of the cap. Discharge lamp characterized by.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25518291A JP2956725B2 (en) | 1991-10-02 | 1991-10-02 | Discharge lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25518291A JP2956725B2 (en) | 1991-10-02 | 1991-10-02 | Discharge lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0594764A true JPH0594764A (en) | 1993-04-16 |
| JP2956725B2 JP2956725B2 (en) | 1999-10-04 |
Family
ID=17275179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25518291A Expired - Fee Related JP2956725B2 (en) | 1991-10-02 | 1991-10-02 | Discharge lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2956725B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0660802A (en) * | 1992-05-25 | 1994-03-04 | Koito Mfg Co Ltd | Electric discharge lamp device |
-
1991
- 1991-10-02 JP JP25518291A patent/JP2956725B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0660802A (en) * | 1992-05-25 | 1994-03-04 | Koito Mfg Co Ltd | Electric discharge lamp device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2956725B2 (en) | 1999-10-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |