US 8,148,884 B2Granted

Electrodeless discharge lamp

AssigneePanasonic Electric Works Co., Ltd.

InventorsHidenori Kakehashi, Hiroshi Miyasaki, Keisuke Harada

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Abstract

An electrodeless discharge lamp is provided which prevents the problem of decrease in strength due to degradation of resin material, allowing secure fitting of a lamp part and a coupler member to a base even if it is used for a long time. A bulb containing a discharge gas and a coupler member for generating a high frequency electromagnetic field to excite the bulb are detachably fitted to each other via a base for fixing and supporting the bulb. The bulb and the base form a lamp part. The base comprises a base frame formed of a metal such as aluminum and a base cover formed e.g. of synthetic resin. The base frame has a coupler member fitting portion which is provided at a lower part thereof and fitted to the coupler member, wherein bulb fixing posts provided to stand on the coupler member fitting portion fix a bulb outer tube. Thus, the fitting portions of the lamp part and the coupler member to the base undergo less material degradation than a conventional one which uses a base of resin material.

Claims8

Dependent claims

An electrodeless discharge lamp comprising:

a bulb having a discharge container containing a discharge gas inside thereof;
a base for fixing and supporting the bulb;
and a coupler member detachably fitted via the base to, and for exciting, the bulb,
wherein the base comprises a metal frame for fixing the discharge container of the bulb, and a resin cover for covering a portion of the metal frame which portion faces the bulb, the metal frame having a base portion fitted to the coupler member, and post portions provided to stand on the base portion for fixing the discharge container of the bulb, the discharge container having a groove formed near a position where it is fitted to the base, the post portions of the metal frame and post portions of the resin cover which are formed corresponding thereto each having a hole formed at a position facing the groove of the bulb and extending in a direction perpendicular to an axial direction of the bulb, a metal piece that serves as a stopper which has a U-shape for preventing falling of the bulb being fitted into the hole, an end of the metal piece being fitted into the groove of the bulb.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 12/064,664Filed 28 Sep 2005
Priority: JP 2005-24685426 Aug 2005
Published: US 2010/0066233 A118 Mar 2010
Granted: 3 Apr 2012
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

H01J 5/60
Means for fastening the separate part to the vessel, e.g. by cement: for fastening by mechanical means
H01J 65/048
By an external electromagnetic field: the field being produced by using an excitation coil
H01J
Electric discharge tubes or discharge lamps

Family

US 2010/0066233 A1Pre-grant publication · published 18 Mar 2010
US 8,148,884 B2This patent

From the US filing history. Foreign family members aren’t listed.

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