Abstract: A buckle provided with a detachable whistle. The buckle includes: a buckle body coupled to an end of a belt; and a whistle that is detachably mounted on a sliding part provided at one side of the buckle body.

Abstract: The present invention relates to a buckle that includes a male latch having an improved shape. An object of the present invention is to provide the buckle that includes a projected part formed on a hook of the male latch, where the projected part has three projected surfaces projected from three side surfaces of the arm. The buckle comprises: the male latch including a pair of hooks each of which has three projected surfaces; and a female receptacle coupled to the male latch by holding the projected surfaces formed on the each hook of the male latch, where the male latch is inserted into the female receptacle.

Abstract: A buckle has plug and socket members which are detachably coupled to each other. The plug member having a base part, a pair of lock arms which project from the base part to be elastically coupled to the socket member, a guide rod which projects from the base part between the pair of lock arms, and bridges which extend from the base part inside the pair of lock arms and are connected to distal ends or middle portions of inner surfaces of the lock arms. The socket member have a chamber which is defined by an upper plate, a lower plate and sidewalls connecting the upper and lower plates and is open at a distal end thereof to receive the pair of lock arms and the guide rod, and engagement parts which are formed outside the chamber to allow distal end portions of the lock arms to be engaged therewith.

Abstract: A buckle has plug and socket members which are detachably coupled to each other. The plug member having a base part, a pair of lock arms which project from the base part to be elastically coupled to the socket member, a guide rod which projects from the base part between the pair of lock arms, and bridges which extend from the base part inside the pair of lock arms and are connected to distal ends or middle portions of inner surfaces of the lock arms. The socket member have a chamber which is defined by an upper plate, a lower plate and sidewalls connecting the upper and lower plates and is open at a distal end thereof to receive the pair of lock arms and the guide rod, and engagement parts which are formed outside the chamber to allow distal end portions of the lock arms to be engaged therewith.

Abstract: A coupling device includes a plug member having a rectangular rail support part and a rectangular rail connected to an outer end of the rectangular rail support part; and a socket member having a rectangular rail groove into which the rectangular rail is fitted and a slot which is defined through a side wall of the socket member defining the rail groove to extend in a lengthwise direction of the rail groove so as to allow the rail support part to pass therethrough. Of both lengthwise ends of the socket member, one end is open to define an entrance through which the rectangular rail is fitted into the rail groove, and the other end is closed.