To provide an attaching method of a ring in a needle assembly, with which a projection length can be settled at a stipulated value and an yield can be improved.
A first ring 31 is disposed on the outer circumference of an installation part 13, a second ring 41 is disposed on the outer circumference of the first ring 31, an inner needle 21 is inserted to a trocar 61, the proximal end of the trocar 61 is abutted on the second ring 41, the second ring 41 is moved in the axial direction of the inner needle 21 together with the trocar 61, and a projection length L of the projection from the distal end of the trocar 61 of an inclined surface 22 provided on the distal end of the inner needle 21 is adjusted to the stipulated value. Then, the first ring 31 as a light absorption part is irradiated with light through the second ring 41 and the first ring 31 and the second ring 41 are optically welded.
TOGO MEDIKIT KK
| JP2012515042A | 2012-07-05 | |||
| JPS60214931A | 1985-10-28 | |||
| JP2012515042A | 2012-07-05 |
| WO2010082707A1 | 2010-07-22 |
Iwa Saki Kokuni
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu
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