| 摘要 |
PURPOSE:To prevent burning of a resin mold part such as a surrounding base by simultaneously irradiating a welding spot with small output laser beams from a plurality of different directions to conduct welding. CONSTITUTION:An edge portion of a connection part 15 of a movable block in an electromagnetic relay is positioned by means of a guide part 4 of a base block 1 so that the connection part 15 may abut on a welding part 3 to conduct laser welding. At this time, laser beams R1, R2 are simultaneously radiated from different plural positions each with small laser beam output so that a total of energy density at a welding spot may become a specified value. Accordingly, reflection of the laser beams irradiates different directions each with small quantity of energy and therefore, even when a resin mold part is irradiated, such a trouble as burning thereof is prevented from occurring. |
