JPS5871972U

JPS5871972U - metal halide lamp

Info

Publication number: JPS5871972U
Application number: JP16710281U
Authority: JP
Inventors: 川澄　建一; 海和　定夫
Original assignee: Hitachi Ltd
Current assignee: Hitachi Ltd
Priority date: 1981-11-11
Filing date: 1981-11-11
Publication date: 1983-05-16

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は、メタルハライドランプの発光管の端部の側面
図である。第２図は、従来例の電極ロッドの側面図で、
第３図は第２図のロッド３′の底面拡大図である。第４
図は、本考案の一実施例の電極ロッド側面図で、第５図
は第４図のロッド３″の底面拡大図、第６図は第４図の
線Ａ−Ａによる横断面拡大図である。第７図は、本考案
の他の一実施例の電極ロッド側面図で、第８図は第７図
のロッド３″′の底面拡大図、第９図は第７図の線Ｂ−
Ｂによる横断面図拡大図である。１・・・発光管；２・・・電極（コイル部）；３．　３
’　、　　３“　３　ｎｔ・・・電極ロッド；４・・・
モリブデン箔；５・・・外部導入線；７．　７’　、　
　８．　９・・・テーパ部；１０・・・電極ロッド３″
の周辺部分。FIG. 1 is a side view of the end of the arc tube of a metal halide lamp. Figure 2 is a side view of a conventional electrode rod.
FIG. 3 is an enlarged bottom view of the rod 3' of FIG. 2. Fourth
The figure is a side view of an electrode rod according to an embodiment of the present invention, FIG. 5 is an enlarged bottom view of the rod 3'' in FIG. 4, and FIG. 6 is an enlarged cross-sectional view taken along line A-A in FIG. 4. 7 is a side view of the electrode rod of another embodiment of the present invention, FIG. 8 is an enlarged bottom view of the rod 3'' in FIG. 7, and FIG. 9 is a view taken along line B-- in FIG.
FIG. 2 is an enlarged cross-sectional view of FIG. 1... Arc tube; 2... Electrode (coil part); 3. 3
', 3" 3 nt...electrode rod; 4...
Molybdenum foil; 5...external lead-in wire; 7. 7',
8. 9...Tapered part; 10...Electrode rod 3''
surrounding area.

Claims

[Scope of utility model registration request]

(1) In a device in which a pair of main electrodes are sealed at both ends of a quartz arc tube, and a metal halide, mercury, and starting gas are sealed inside the tube, the surface of the electrode rod sealed in the quartz arc tube is A metal halide lamp characterized in that it is ground into a tapered shape and the cross section of the sealed portion is formed into a flat approximately hexagonal to octagonal shape.

(2) When the thickness of the flat part on the bottom of the electrode rod is t and the diameter of the rod is D, the ratio of D to t is within the range of 2 to 6, and the longest diagonal on the bottom is D. The first claim for utility model registration, which is equivalent to
Metal halide lamps listed in section.

(3) In the case where the cross section of the sealing portion of the electrode rod is approximately octagonal, the pair of opposite sides at the maximum distance is a part of the periphery of the electrode rod. The metal halide lamp described in item 1.