JPH07176295A - Translucent bulb seal part structure for high brightness electric discharge lamp - Google Patents
Translucent bulb seal part structure for high brightness electric discharge lampInfo
- Publication number
- JPH07176295A JPH07176295A JP24793293A JP24793293A JPH07176295A JP H07176295 A JPH07176295 A JP H07176295A JP 24793293 A JP24793293 A JP 24793293A JP 24793293 A JP24793293 A JP 24793293A JP H07176295 A JPH07176295 A JP H07176295A
- Authority
- JP
- Japan
- Prior art keywords
- gap
- cap
- small
- diameter
- opening
- 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.)
- Pending
Links
- 229910000679 solder Inorganic materials 0.000 claims abstract description 23
- 230000037431 insertion Effects 0.000 claims abstract description 9
- 238000003780 insertion Methods 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims description 23
- 239000011521 glass Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910001507 metal halide Inorganic materials 0.000 description 4
- 150000005309 metal halides Chemical class 0.000 description 4
- 229910000497 Amalgam Inorganic materials 0.000 description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- 238000010891 electric arc Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 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 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000006060 molten glass Substances 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はメタルハライドランプや
ナトリウムランプ等の高輝度放電灯の封止部構造に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing portion structure for a high intensity discharge lamp such as a metal halide lamp or a sodium lamp.
【０００２】[0002]
【従来の技術】発光効率が高く、しかも封入金属に応じ
た色の発光を呈するため、高輝度放電灯は室内灯のみな
らず野外やショーウインドなどの照明として注目されて
いる。斯かる高輝度放電灯は透光性バルブ（発光管）内
に金属ハロゲン化物を封入し、バルブ内に挿入された内
部電極間に高電圧を印加することで電極間にアーク放電
を発生させ、このアーク放電による熱で発光管内に封入
した金属ハロゲン化物を蒸発させ、金属とハロゲンに解
離し、金属特有の色を呈する発光を行なわせるようにし
たものである。このため、図５（ａ）に示すように透光
性バルブ１００にアマルガム（金属ハロゲン化物）を入
れるための開口部１０１を設け、アマルガム封入後、開
口部１０１にキャップ１０２を挿入し、封着用ガラスリ
ング１０３をバルブ１００とキャップ１０２のフランジ
部１０２ａとの間に挟んで加熱し、溶融したガラスソル
ダ１０４を開口部１０１とキャップ１０２との間に充填
して封着するようにしている。2. Description of the Related Art A high-intensity discharge lamp is attracting attention as an indoor light as well as an outdoor light, a show window light, and the like because it has a high luminous efficiency and emits light of a color corresponding to a sealed metal. In such a high-intensity discharge lamp, a metal halide is enclosed in a translucent bulb (arc tube), and a high voltage is applied between internal electrodes inserted in the bulb to generate arc discharge between the electrodes, The heat generated by this arc discharge evaporates the metal halide enclosed in the arc tube, dissociates it into metal and halogen, and emits light having a color peculiar to the metal. Therefore, as shown in FIG. 5A, the translucent bulb 100 is provided with an opening 101 for inserting an amalgam (metal halide), and after encapsulating the amalgam, a cap 102 is inserted into the opening 101 for sealing. The glass ring 103 is sandwiched between the bulb 100 and the flange portion 102a of the cap 102 and heated, and the molten glass solder 104 is filled between the opening portion 101 and the cap 102 so as to be sealed.
【０００３】上述した封止部の構造にあっては、キャッ
プ１０２がフランジ部１０２ａを有しているので、キャ
ップの熱容量が大きくなり、ガラスリング１０３を溶融
するための加熱量が増して封着時に金属蒸気が逃げやす
い。また、キャップ１０２の軸部１０２ｂと開口部１０
１との間にガラスソルダ１０４が侵入し得るだけの隙間
を形成しなければならないので、図５（ｃ）に示すよう
に芯ずれが生じ、広くなった部分に気泡等が混入しやす
い。更にバルブ１００内へのガラスソルダの垂れも起り
易い。In the above-mentioned structure of the sealing portion, since the cap 102 has the flange portion 102a, the heat capacity of the cap is increased, and the heating amount for melting the glass ring 103 is increased to perform sealing. Sometimes metal vapor escapes easily. Further, the shaft portion 102b of the cap 102 and the opening 10
Since a gap for allowing the glass solder 104 to enter is required to be formed between the first and the second components, a misalignment occurs as shown in FIG. 5C, and bubbles or the like are easily mixed in the widened portion. Furthermore, the dripping of the glass solder into the bulb 100 easily occurs.
【０００４】このような不利を解消するものとして、特
開昭２−２１３０１号公報に開示される封止部構造が知
られている。この封止部構造は図６に示すように、キャ
ップ１０２の形状を先部が大径の台部１０２ｃとなるよ
うにし、芯ずれと垂れが生じないようにしたものであ
る。As a means for eliminating such disadvantages, a sealing portion structure disclosed in Japanese Patent Application Laid-Open No. 2-21301 is known. As shown in FIG. 6, this sealing portion structure is such that the tip of the cap 102 is a pedestal portion 102c having a large diameter to prevent misalignment and sagging.
【０００５】[0005]
【発明が解決しようとする課題】上述した特開昭２−２
１３０１号公報に開示される封止部構造にあっては、封
着時にキャップ１０２がバルブ１００内に落下してしま
うので、クロスバーによって落下を防止しなければなら
ず、構造が複雑化する。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the structure of the sealing portion disclosed in Japanese Patent No. 1301, since the cap 102 falls into the valve 100 during sealing, it is necessary to prevent the cap 102 from falling by the crossbar, which complicates the structure.
【０００６】[0006]
【課題を解決するための手段】上記課題を解決すべく本
発明は、透光性バルブの開口部にキャップを挿入すると
ともに、このキャップと開口部との隙間にガラスソルダ
を充填して封止するようにした高輝度放電灯の封止部構
造において、前記キャップは挿入方向を基準として先部
が小径軸部で後部が大径軸部となったロッド状とし、ま
た前記開口部には前記小径軸部が挿入される小径口部と
前記大径軸部が挿入される大径口部を形成し、前記小径
軸部と小径口部との隙間はガラスソルダが侵入しない狭
い隙間とし、前記大径軸部と大径口部との隙間はガラス
ソルダが侵入し得る大きな隙間とした。In order to solve the above-mentioned problems, the present invention inserts a cap into the opening of a translucent bulb and fills a gap between the cap and the opening with glass solder for sealing. In the high-intensity discharge lamp sealing portion structure, the cap is rod-shaped with the small-diameter shaft portion at the front and the large-diameter shaft portion at the rear with respect to the insertion direction, and the opening has the above-mentioned structure. A small-diameter opening portion into which the small-diameter shaft portion is inserted and a large-diameter opening portion into which the large-diameter shaft portion is inserted are formed, and the gap between the small-diameter shaft portion and the small-diameter opening portion is a narrow gap where glass solder does not enter, The gap between the large-diameter shaft portion and the large-diameter mouth portion is a large gap into which the glass solder can enter.
【０００７】[0007]
【作用】キャップの小径軸部とバルブの小径口部とでキ
ャップの位置決めを行い、キャップの大径軸部とバルブ
の大径口部との間の隙間をガラスソルダが充填される隙
間とし、更にキャップの段部を開口部の段部に当てるこ
とでキャップの挿入方向の位置決めがなされる。[Function] The cap is positioned by the small-diameter shaft portion of the cap and the small-diameter opening portion of the valve, and the gap between the large-diameter shaft portion of the cap and the large-diameter opening portion of the valve is set as a gap filled with glass solder, Further, by positioning the step portion of the cap against the step portion of the opening, the positioning of the cap in the insertion direction is performed.
【０００８】[0008]
【実施例】以下に本発明の実施例を添付図面に基づいて
説明する。ここで、図１は本発明に係る高輝度放電灯の
透光性バルブの断面図であり、下端の開口部は既に封着
が完了した状態を、上端の開口部は封着前の状態を示
す。また図２は同透光性バルブの封着前の封止部の拡大
断面図である。Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a cross-sectional view of a translucent bulb of a high-intensity discharge lamp according to the present invention, in which an opening at a lower end shows a state where sealing is already completed and an opening at an upper end shows a state before sealing. Show. Further, FIG. 2 is an enlarged cross-sectional view of a sealing portion of the translucent valve before sealing.
【０００９】透光性バルブ１は多結晶アルミナ等からな
り、その上端部及び下端部には開口部２，２が形成され
ている。そして、開口部２にはセラミックス製キャップ
３が挿入され、下端の開口部２に示すようにガラスソル
ダ４を介して気密に封着されている。The translucent bulb 1 is made of polycrystalline alumina or the like, and has openings 2 and 2 at its upper and lower ends. A ceramic cap 3 is inserted into the opening 2 and is hermetically sealed via a glass solder 4 as shown in the opening 2 at the lower end.
【００１０】前記開口部２は図２にも示すように、内部
寄りの部分を小径口部２ａとし、外側寄りの部分を大径
口部２ｂとし、また前記キャップ３は挿入方向を基準と
して先部が小径軸部３ａで後部が大径軸部３ｂとなって
おり、小径口部２ａに小径軸部３ａが挿入され、大径口
部２ｂに大径軸部３ｂが挿入される。そして、挿入され
た状態で、小径口部２ａと小径軸部３ａとの隙間Ｇ１は
大径口部２ｂと大径軸部３ａとの隙間Ｇ２よりも小さく
なるように設定している。具体的には隙間Ｇ１はガラス
ソルダ４が侵入しない程度に狭い隙間とし、隙間Ｇ２は
ガラスソルダ４が侵入し得るに十分な大きな隙間とす
る。As shown in FIG. 2, the opening 2 has a small-diameter opening 2a on the inner side and a large-diameter opening 2b on the outer side, and the cap 3 has a front end based on the insertion direction. The portion has a small diameter shaft portion 3a and the rear portion is a large diameter shaft portion 3b. The small diameter shaft portion 3a is inserted into the small diameter opening portion 2a, and the large diameter shaft portion 3b is inserted into the large diameter opening portion 2b. Then, in the inserted state, the gap G1 between the small diameter mouth portion 2a and the small diameter shaft portion 3a is set to be smaller than the gap G2 between the large diameter mouth portion 2b and the large diameter shaft portion 3a. Specifically, the gap G1 is a narrow gap that does not allow the glass solder 4 to enter, and the gap G2 is a large gap that allows the glass solder 4 to enter.
【００１１】また、キャップ３の内端部にはタングステ
ン製の内部電極５の基部が圧入され、外端部には同じく
タングステン製の外部電極６が圧入され、これら内部電
極５と外部電極６とをキャップ３の外周面に形成したＰ
t等からなる導電膜７にて電気的に接続している。尚、
外端部のタングステン製の外部電極６は、必ずしも必要
ではなく、外端部に形成されている導電膜７を外部電極
として利用してもよい。The base portion of the internal electrode 5 made of tungsten is press-fitted into the inner end portion of the cap 3, and the external electrode 6 made of tungsten is also press-fitted into the outer end portion thereof. P formed on the outer peripheral surface of the cap 3
It is electrically connected by a conductive film 7 made of t or the like. still,
The outer electrode 6 made of tungsten at the outer end is not always necessary, and the conductive film 7 formed at the outer end may be used as the outer electrode.
【００１２】また、導電膜７についてはキャップ３の外
周面全面に形成せずに、図３に示すように内部電極５の
圧入孔と交じわる径方向孔を形成し、この径方向孔に導
体８を充填又は塗布することで導通をとるようにしても
よい。Further, the conductive film 7 is not formed on the entire outer peripheral surface of the cap 3, but a radial hole intersecting with the press-fitting hole of the internal electrode 5 is formed as shown in FIG. The conductor 8 may be filled or applied to establish conduction.
【００１３】以上において、高輝度放電灯を組み立てる
には図１に示すように透光性バルブ１の一端開口部２を
封着した状態で、透光性バルブ１内にアマルガムを入
れ、次いで図１の上端部及び図２に示すように開口部２
にキャップ３を挿入する。この挿入にあたって、開口部
２の小径口部２ａとキャップ３の小径軸部３ａとの隙間
Ｇ１は小さいため、この部分においてキャップ３は位置
決めされる。In the above, to assemble a high-intensity discharge lamp, as shown in FIG. 1, an amalgam is put in the light-transmitting bulb 1 with one end opening 2 of the light-transmitting bulb 1 sealed. 1 and the opening 2 as shown in FIG.
Insert the cap 3 into. Upon this insertion, the gap G1 between the small diameter opening 2a of the opening 2 and the small diameter shaft portion 3a of the cap 3 is small, so that the cap 3 is positioned in this portion.
【００１４】また、キャップ３の挿入は開口部２の段部
９にキャップ３の段部１０が当接するまで行う。このよ
うにすることでキャップ３の挿入方向の位置決めができ
る。尚、開口部２に形成する段部を図４に示すように雌
テーパ状段部１１とし、キャップ３につてもこの雌テー
パ状段部１１に対応する雄テーパ状段部を形成するよう
にしてもよい。このようにすれば挿入にあたっての芯合
せが更に正確且つ容易になる。The cap 3 is inserted until the stepped portion 10 of the cap 3 comes into contact with the stepped portion 9 of the opening 2. This makes it possible to position the cap 3 in the insertion direction. The step portion formed in the opening 2 is a female taper step portion 11 as shown in FIG. 4, and the cap 3 is also formed with a male taper step portion corresponding to the female taper step portion 11. May be. By doing so, the alignment at the time of insertion becomes more accurate and easy.
【００１５】上記の如くして、開口部２にキャップ３を
挿入したならば、コンプレッサにて透光性バルブ１内の
空気を排出し、更にキャップ３の周囲にガラスリング１
２をセットして高周波にて加熱する。すると、ガラスリ
ング１２は溶融しガラスソルダ４となって隙間Ｇ２内に
侵入し封着が完了する。When the cap 3 is inserted into the opening 2 as described above, the air in the light-transmitting bulb 1 is discharged by the compressor, and the glass ring 1 is further provided around the cap 3.
Set 2 and heat with high frequency. Then, the glass ring 12 is melted and becomes the glass solder 4 and enters the gap G2 to complete the sealing.
【００１６】[0016]
【発明の効果】以上に説明したように本発明によれば、
放電灯のバルブの開口部を封止するキャップをロッド状
としたので、封着の際の加熱量を少なくすることがで
き、バルブ内に封入した金属蒸気の逃げを抑えることが
できる。また、キャップをロッド状としたことで、従来
のようにキャップのフランジ部とバルブとの間にガラス
リングを挟み込む必要がなくなり、したがってキャップ
の沈み込みを考慮しなくて済む。As described above, according to the present invention,
Since the rod-shaped cap that seals the opening of the bulb of the discharge lamp is used, the amount of heating during sealing can be reduced, and the escape of the metal vapor sealed in the bulb can be suppressed. Further, since the cap is rod-shaped, it is not necessary to sandwich the glass ring between the flange portion of the cap and the bulb as in the conventional case, and therefore, the sinking of the cap need not be considered.
【００１７】また、キャップの形状を挿入方向を基準と
して先部を小径軸部、後部を大径軸部とし、前記開口部
には前記小径軸部が挿入される小径口部と前記大径軸部
が挿入される大径口部を形成し、前記小径軸部と小径口
部との隙間はガラスソルダが侵入しない狭い隙間とし、
前記大径軸部と大径口部との隙間はガラスソルダが侵入
し得る大きな隙間としたので、ガラスソルダの内部への
垂れを生じることなく、小径軸部と小径口部とでキャッ
プの位置決めが行え、大径軸部と大径口部との間の隙間
にガラスソルダを充填して確実な封着が行え、更にキャ
ップの段部を開口部の段部に当てることでキャップの挿
入方向の位置決めもできる。With the shape of the cap as a reference, the front portion is a small-diameter shaft portion, the rear portion is a large-diameter shaft portion, and the small-diameter opening portion into which the small-diameter shaft portion is inserted and the large-diameter shaft portion. Forming a large-diameter mouth portion into which the portion is inserted, and the gap between the small-diameter shaft portion and the small-diameter mouth portion is a narrow gap in which glass solder does not enter,
Since the gap between the large-diameter shaft portion and the large-diameter mouth portion is a large gap into which the glass solder can enter, positioning of the cap between the small-diameter shaft portion and the small-diameter mouth portion does not occur inside the glass solder. The glass solder can be filled in the gap between the large-diameter shaft and the large-diameter mouth for reliable sealing, and the stepped portion of the cap can be applied to the stepped portion of the opening to insert the cap in the insertion direction. Can also be positioned.
【図１】本発明に係る高輝度放電灯の透光性バルブの断
面図FIG. 1 is a sectional view of a translucent bulb of a high-intensity discharge lamp according to the present invention.
【図２】同透光性バルブの封止部の拡大断面図FIG. 2 is an enlarged sectional view of a sealing portion of the translucent bulb.
【図３】キャップの別実施例を示す断面図FIG. 3 is a sectional view showing another embodiment of the cap.
【図４】透光性バルブの開口部の別実施例を示す断面図FIG. 4 is a cross-sectional view showing another embodiment of the opening of the translucent bulb.
【図５】（ａ）乃至（ｃ）は従来の封止部の構造を示す
図5A to 5C are views showing a structure of a conventional sealing portion.
【図６】従来の封止部の構造を示す図FIG. 6 is a diagram showing a structure of a conventional sealing portion.
１…透光性バルブ、２…開口部、２ａ…小径口部、２ｂ
…大径口部、３…キャップ、３ａ…小径軸部、３ｂ…大
径軸部、４…ガラスソルダ、５…内部電極、６…外部電
極、Ｇ１…小径口部と小径軸部との隙間、Ｇ２…大径口
部と大径軸部との隙間。DESCRIPTION OF SYMBOLS 1 ... Translucent bulb, 2 ... Opening part, 2a ... Small diameter port part, 2b
... Large-diameter mouth part, 3 ... Cap, 3a ... Small-diameter shaft part, 3b ... Large-diameter shaft part, 4 ... Glass solder, 5 ... Internal electrode, 6 ... External electrode, G1 ... Gap between small-diameter mouth part and small-diameter shaft part , G2 ... A gap between the large diameter opening and the large diameter shaft.
Claims (1)
するとともに、このキャップと開口部との隙間にガラス
ソルダを充填して封止するようにした高輝度放電灯の封
止部構造において、前記キャップは挿入方向を基準とし
て先部が小径軸部で後部が大径軸部となったロッド状を
なし、また前記開口部には前記小径軸部が挿入される小
径口部と前記大径軸部が挿入される大径口部が形成さ
れ、前記小径軸部と小径口部との隙間はガラスソルダが
侵入しない狭い隙間とされ、前記大径軸部と大径口部と
の隙間はガラスソルダが侵入し得る大きな隙間とされて
いることを特徴とする高輝度放電灯の透光性バルブ封止
部構造。1. A high brightness discharge lamp sealing structure, wherein a cap is inserted into an opening of a translucent bulb and a gap between the cap and the opening is filled with glass solder for sealing. The cap has a rod shape with a small-diameter shaft portion at the front and a large-diameter shaft portion at the rear with respect to the insertion direction, and the small-diameter mouth portion and the large-diameter portion into which the small-diameter shaft portion is inserted in the opening. A large-diameter opening portion into which the radial shaft portion is inserted is formed, and the gap between the small-diameter shaft portion and the small-diameter opening portion is a narrow gap in which glass solder does not enter, and the gap between the large-diameter shaft portion and the large-diameter opening portion. Is a translucent bulb sealing structure for high-intensity discharge lamps, which has a large gap into which glass solder can penetrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24793293A JPH07176295A (en) | 1993-10-04 | 1993-10-04 | Translucent bulb seal part structure for high brightness electric discharge lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24793293A JPH07176295A (en) | 1993-10-04 | 1993-10-04 | Translucent bulb seal part structure for high brightness electric discharge lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07176295A true JPH07176295A (en) | 1995-07-14 |
Family
ID=17170704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24793293A Pending JPH07176295A (en) | 1993-10-04 | 1993-10-04 | Translucent bulb seal part structure for high brightness electric discharge lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07176295A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996025759A1 (en) * | 1995-02-13 | 1996-08-22 | Toto Ltd. | Structure for sealing section of metal vapor discharge lamp |
-
1993
- 1993-10-04 JP JP24793293A patent/JPH07176295A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996025759A1 (en) * | 1995-02-13 | 1996-08-22 | Toto Ltd. | Structure for sealing section of metal vapor discharge lamp |
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