| 摘要 |
An endoscope includes a distal end hard portion provided at a distal end portion of an insertion portion, and a nozzle which is arranged to pass through the distal end hard portion and configured to eject a fluid. The distal end hard portion includes a cylindrical distal end portion main body which includes a first hole portion in which the nozzle is arranged, and a distal end cover which is configured to cover an outer periphery of the distal end portion main body, and which includes a second hole portion coaxially provided with the first hole portion and a first engagement portion provided at an edge portion of the second hole portion. The nozzle includes a cylindrical core member which includes one end, the other end, a flow path through which the fluid is allowed to flow toward the one end from the other end, and a nozzle opening which is arranged at the one end and arranged at a position protruding from a distal end surface of the distal end cover, a second engagement portion which is provided on an outer side of the core member, elastically deformable, has self-restoration properties to hold its shape, is engaged with the first engagement portion of the distal end cover, and is configured to secure air-tightness and water-tightness in the insertion portion, and a cylindrical coupling portion which is arranged at the other end of the core member and which is coupled with the first hole portion of the distal end portion main body. |
