| CPC B23K 20/125 (2013.01) [B23K 31/02 (2013.01); H05K 5/0221 (2013.01); H05K 7/1409 (2013.01)] | 11 Claims |

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1. A welding structure capable of rotational movement, comprising:
a seat member having a welding portion, the welding portion being adapted to be welded to an object; and
a rotational movement member movably fitted to the seat member,
wherein the object has a copper layer or a prewelding layer, the welding portion has a weldable layer, the weldable layer has a surface, the surface is in a periphery of the welding portion, and the surface of the weldable layer is welded to the copper layer or the prewelding layer of the object by a solder layer.
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