Patent ID: 7241055

Claim:
An adaptor unit for an optical plug which connects each front facet of two ferrules facing with each other and is installed at either male or female opening part, the adaptor unit comprising: a dividing sleeve which includes each front facet of said two ferrules and holds each front ferrules facing with each other in connecting process; a plurality of dividing sleeve holders, each being an approximately cylindrical dividing sleeve holder which includes and holds said dividing sleeve; and an adaptor main body of the adaptor unit which holds said dividing sleeve holder by including at least a portion of said dividing sleeve holder, wherein said adaptor main body comprises a fitting part which fits with said dividing sleeve holder to restrain movement of said dividing sleeve holder at least in the optical axis direction, said dividing sleeve holder comprises a front tubular part and a back tubular part which is adjacent and fixed to said front tubular part, and said front tubular part of said dividing sleeve holder comprises an engagement part for connecting with a predetermined jig, and wherein a respective said fitting part comprises a convex part which projects to the axis side of each said dividing sleeve holder and is sandwiched between said front tubular part and said back tubular part in said optical axis direction.