| 摘要 |
PROBLEM TO BE SOLVED: To suppress abrasion of a nose or a body, falling-off of the nose caused by deformation, or catching of the body in the body caused by oblique insertion of the nose. SOLUTION: The body 12 is provided with a recessed insertion part 14 in which the nose 40 is inserted. A resin collet 22 with projecting part 22C engaged to a circumferential groove 44 of an outer circumferential face of the nose 40 is disposed in the recessed insertion part 14. On the outer circumference of a main body 16, a cover 26 is provided to be circumferentially rotated between a lock position A and a lock release position B. At the lock release position B, a recess part 27C of the cover 26 is engaged with a projecting part 30 of the main body 16, and the collet 22 is pushed to the back to release the engagement between the projecting part 22C with the circumferential groove 44. When the turning of the cover 26 from the lock position A to the lock release position B, a first projecting part 32 of the outer circumferential face of the main body 16 abuts on a second projecting part 28 of an inner circumferential face of the cover 26 to restrict the turning of the cover 26. COPYRIGHT: (C)2009,JPO&INPIT
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