Patent ID: 9132507
Filing Date: 2015-09-15
Classification: A61B,B23K

Abstract:
1. A laser welding method for an endoscope fixes by welding an outer cylindrical member of an endoscope to an inner coil-shaped member positioned inside the outer cylindrical member by irradiating the outer cylindrical member with laser beams from a periphery of the outer cylindrical member spirally on an axis of the outer cylindrical member, the method comprising: when a thickness of a plate of the outer cylindrical member is set as h, a thickness of a plate of the inner coil-shaped member is set as h spiral weld beads formed by the irradiating of the outer cylindrical member do not overlap; a welding depth H from the outer cylindrical member to the inner coil-shaped member holds true h<H<h+h the welding energy E when the welding depth of the fixing by welding between the outer cylindrical member and the inner coil-shaped member is H satisfies an expression of E