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Fused joint structure in a lamp tube and forming method therefor

A technology of fusion bonding and manufacturing method, applied in the manufacture of discharge tubes/lamps, cold cathode manufacture, electrode system manufacture, etc., can solve the problems of easy fracture of grain boundaries, poor welding peeling, etc., achieve stable welding strength, and realize poor deformation. , The effect of reducing welding perforation defects

Active Publication Date: 2009-05-20
USHIO DENKI KK
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, the present inventors have found that when the lead rods and metal foils of the lamp electrodes are actually welded by YAG laser, as shown in FIG. The energy of welding causes the recrystallization of the weld nugget, and due to the heat shrinkage after welding, the grain boundary between the recrystallization part and the non-recrystallization part is easy to break, resulting in a very fragile weld, and welding peeling failure occurs

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  • Fused joint structure in a lamp tube and forming method therefor
  • Fused joint structure in a lamp tube and forming method therefor
  • Fused joint structure in a lamp tube and forming method therefor

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Embodiment Construction

[0024] Lamps to which the fusion-bonded structure of the present invention is applied include incandescent lamps or discharge lamps typified by halogen lamps. In addition, in the present invention, "conductive member" refers to an inner lead rod and an outer lead rod in an incandescent lamp, and refers to an electrode core rod and an outer lead rod in a discharge lamp using a metal foil seal. In the discharge lamp of the foil seal, a plurality of metal foils are welded, a disk-shaped member connected to an electrode mandrel, and a disk-shaped member connected to an external lead.

[0025] A first embodiment of the present invention will be described with reference to FIGS. 1 to 4 .

[0026] FIG. 1 is a cross-sectional view showing the configuration of a both-ends-sealed type discharge lamp using one metal foil seal.

[0027] As shown in the figure, a pair of electrodes 3 are disposed in the discharge vessel 2 of the discharge lamp 1, and a metal foil of an electrode core rod ...

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Abstract

The invention provides a fused joint structure for a lamp, capable of obtaining stable high welding strength, reducing bad distortion and lack welding strength as well as bad welding through hole, and a method for manufacturing the same. The fused joint structure comprises a conductive member (5) made of high melting point metal, and a metallic foil (6), and is characterized in that the high melting point metal of the conductive member (5) is fused with the metallic foil (6) on an area where the metallic foil (6) is put together on a surface of the conductive member (5), and a circumferential edge of the concave portion of the metallic foil (6) is covered with the high melting point metal of the conductive member (5). Moreover, the method for manufacturing the fused joint structure is characterized in that a laser of more than 40MW / cm<2> energy is illuminated into the area where the metallic foil (6) is put together on a surface of the conductive member (5), from one side of the metallic foil (6) by a fiber laser device, to joint the conductive member (5) and the metallic foil (6).

Description

technical field [0001] The invention relates to a fusion bonding structure related to a lamp power supply structure and a manufacturing method thereof. Background technique [0002] Conventionally, in halogen lamps for OA, mercury lamps for liquid crystal projection light sources, and metal halide lamps for general lighting, internal leads and external leads are bonded via metal foil in the sealing part to ensure the airtightness of the light-emitting space inside the lamp. . When the internal wire and the external wire are bonded to the metal foil, for example, the OA is sealed by a pinch seal (pinch seal), and the bonding part of the metal foil and the internal wire of the halogen lamp is sealed by a shrink seal (shrink seal). Conventionally, resistance welding is used to join the metal foil and internal lead wires of mercury lamps used as light sources for projectors. [0003] However, in the resistance welding method, welding conditions fluctuate due to changes in weld...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J61/36
CPCH01J61/368H01J9/326
Inventor 长町信宏熊田丰彦
Owner USHIO DENKI KK
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