| 摘要 |
PURPOSE:To facilitate pipe fixation with high watertightness and high reliability, by pressure welding the ring projection of the outer circumferential step part of a pipe against the inner circumference of the through hole of a timepiece case by an electrode and performing resistance welding. CONSTITUTION:The projection P of the outer circumferential step part 6 of the pipe 1 is pressure welded against the inner circumference of the through hole of the timercase 2 through an electrode 10. Then, the pipe is fixed to the timepiece case easily by resistance welding through the projection by an electrode 9 and the electrode 10 in a highly watertight, excellently corrosion-resisting, and highly reliable state. |
