Patent attributes
A cap main body is provided with an approximately rectangular conical occluded portion in a leading end side, an approximately rectangular tubular cover portion in an inner side of the occluded portion, and approximately rectangular tubular right and left and upper and lower side plates in a rear end side. A pair of slits are provided at upper and lower positions of the right and left side plates or right and left positions of the upper and lower side plates from an opening end of the cap main body toward an inward occluded portion so that elastic side plates are formed in a facing manner. A locking mechanism protruding out of an opening portion in a rear end of the cap main body and capable of locking to and unlocking from a spring push of the plug main body is provided in a leading end of the elastic side plates.
