US Patent 7946002 Connecting device

A connecting device which has an excellent appearance, produces no frictional sound between a connecting device main body such as a swivel hook main body and a belt attaching member and can be assembled easily and securely. The connecting device includes a neck portion standing from a proximal portion of a main body of the connecting device and an engagement head which is expanded in an outward direction form a center of an axis line such that a diameter thereof can be reduced, the engagement head being provided at a front end of the neck portion. A belt attaching member is connected to the main body rotatably around the neck portion. A through hole which the engagement head can be engaged with by insertion is formed in part of the belt attaching member. In the through hole, a small-diameter hole portion having a smaller diameter than the diameter of the engagement head and a large-diameter hole portion having a large diameter than the diameter of the engagement head are connected via a stepped portion. The large-diameter hole portion has a ring-like member which allows the neck portion to be inserted therethrough. The ring-like member has a cylindrical wall portion which is accommodated in the large-diameter hole portion and a ring-like engaging portion provided at an end of the wall portion and extended toward a center thereof. An inside diameter of the engaging portion is equal to an outside diameter of the diameter of the engagement head when it is reduced.