Retractable buckle coupling device

Abstract

The present invention relates to a buckle coupling device in which a part of the buckle coupling device remains fixed while the other part is movable in a certain range so that a length of the buckle coupling device is temporarily extended, and the moved part of the buckle coupling device returns to an original position thereof by an internal spring that is compressed when the length is extended. According to the present invention, a retractable buckle coupling device includes: a belt coupling member having a first fixing protrusion, a fixed part, and a coupling part; a first cover member having a fastening rod; a buckle fastening member having a second fixing protrusion and a fastening part; at least one spring member fitted to the first fixing protrusion and the second fixing protrusion; and a second cover member fastened to the fastening rod.

What is claimed is: 
     
         1 . A retractable buckle coupling device comprising:
 a belt coupling member having at least one first through-hole and at least one first spring hole, which have a predetermined length and are formed through upper and lower ends of the belt coupling member in parallel with each other, having a side surface opened to form a first seating groove connected to the first spring hole, having a first fixing protrusion protruding toward an inside of the first spring hole, and including a fixed part, which has at least one guide protruding upward between the first through-hole and the first spring hole, and a coupling part to which a belt is coupled;   a first cover member having opposite side surfaces opened to form a reception groove for receiving the fixed part, and having a fastening rod provided in the reception groove to pass through the first through-hole;   a buckle fastening member having at least one second through-hole corresponding to the first through-hole and at least one second spring hole corresponding to the first spring hole, having a second fixing protrusion protruding toward an inside of the second spring hole and seated in the first seating groove, having a side surface opened to form a second seating groove connected to the second spring hole, having at least one guide groove into which the at least one guide is inserted, and provided at one distal end thereof with a fastening part to which a buckle is fastened;   at least one spring member having one distal end and an opposite distal end fitted to the first fixing protrusion and the second fixing protrusion, respectively; and   a second cover member fastened to the fastening rod to close the reception groove and prevent the buckle fastened to the fastening part from being separated.   
     
     
         2 . The retractable buckle coupling device of  claim 1 , wherein the spring member includes a compression coil spring. 
     
     
         3 . The retractable buckle coupling device of  claim 1 , wherein the buckle coupling device is bidirectionally retractable. 
     
     
         4 . The retractable buckle coupling device of  claim 1 , wherein a screw coupling groove is formed at an upper end of the fastening rod,
 the second cover member is formed with a screw coupling hole corresponding to the screw coupling groove, and   the first cover member and the second cover member are screw-coupled to each other.