Adaptor unit and optical plug

摘要

A screwing part 1220 is inserted into a large through-hole 1110 from its front side and is screwed together with a male screw part of a jig. A convex part 1230 in an approximately ring shape is formed at a back end part of the screwing part 1220 . The convex part 1230 is adjacent to a fitting part 1111 which is made of an approximately ring convex part projecting toward inside of the large through-hole 1110 . The back of the fitting part 1111 is adjacent to a front end opening part 1310 of a back tubular part 1300 . In short, the fitting part 1111 of the adaptor main body 1110 is sandwiched between the convex part 1230 and the front end opening part 1310 . By inserting and pressing the back end opening part 1210 of the front tubular part 1200 into the front end opening part 1310 of the back tubular part 1300 , the front tubular part 1200 and the back tubular part 1300 are connected and fixed with each other. Sign beta represents their pressing part.