Invention Grant
- Patent Title: Electrode for high pressure discharge lamp, high pressure discharge lamp, and method for manufacturing electrode for high pressure discharge lamptechnical field
- Patent Title (中): 高压放电灯用电极,高压放电灯,高压放电用电极用电极制造方法
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Application No.: US13054872Application Date: 2009-06-09
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Publication No.: US08159135B2Publication Date: 2012-04-17
- Inventor: Toshio Yoshizawa , Junpei Nishimura , Yoshiaki Kuroda
- Applicant: Toshio Yoshizawa , Junpei Nishimura , Yoshiaki Kuroda
- Applicant Address: JP Chuo-ku, Tokyo
- Assignee: Iwasaki Electric Co., Ltd.
- Current Assignee: Iwasaki Electric Co., Ltd.
- Current Assignee Address: JP Chuo-ku, Tokyo
- Agency: Robinson Intellectual Property Law Office, P.C.
- Agent Eric J. Robinson
- Priority: JP2008-191786 20080725
- International Application: PCT/JP2009/060494 WO 20090609
- International Announcement: WO2010/010759 WO 20100128
- Main IPC: H01J61/06
- IPC: H01J61/06 ; H01J17/04

Abstract:
Provided is an electrode for a high pressure discharge lamp, which prevents spring-back of an electrode coil, and which has high productivity and high accuracy in positioning the coil. The electrode for the high pressure discharge lamp includes: an electrode core bar (30); and a coil (35) mounted on the electrode core bar, and is configured as follows. The electrode core bar (30) includes: a small-diameter section (31) on a power supply side; and a large-diameter section (32) on a leading end side. The large-diameter section (32) has: a large-diameter portion (32a) on the small-diameter section side; a small-diameter portion (32b) having a smaller outer diameter than the large-diameter portion, the small-diameter portion forming a step (s) with the large-diameter portion therebetween; and a leading end portion (32c). The coil (35) covers a portion between the step (s) and the leading end portion.
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