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.
1. A buckle having a plug member and a socket member which are detachably coupled to each other,
wherein 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, and
wherein 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,
wherein a slot is defined in the guide rod in a lengthwise direction of the guide rod, and a guide rib to be fitted into the slot of the guide rod is formed in the chamber of the socket member in such a way as to connect the upper and lower plates,
wherein the slot is defined to a middle portion of the guide rod, a connecting part is formed to extend from the middle portion of the guide rod to the base part, and a rib groove is defined in the guide rib to receive the connecting part.
2. The buckle according to claim 1 , wherein each bridge is formed with one or at least two bending portions on an intermediate portion thereof.
3. The buckle according to claim 1 , wherein each bridge is formed in such a way as to define a curved surface.
4. The buckle according to claim 1 , wherein each bridge is formed of a flexible material.
5. The buckle according to claim 1 , wherein the guide rod of the plug member is formed between the lock arms to be shorter than the lock arms.
6. The buckle according to claim 1 , wherein openings are defined on the sidewalls of the socket member which connect the upper and lower plates such that the engagement parts are formed through molding and outer surfaces of the distal end portions of the lock arms are exposed through the openings.
7. The buckle according to claim 1 , wherein a space part is defined in a rear part of the socket member to communicate with the chamber defined in the socket member and has indents which are defined in the upper and lower plates so that the space part can be enlarged forward into the socket member.
8. The buckle according to claim 7 , wherein the indents are defined to have the sectional shape of a ‘V’ which gradually decreases in a width thereof toward a center portion of the socket member.
9. The buckle according to claim 7 , wherein the indents are defined to have the sectional shape of a ‘Y’ which gradually decreases in a width thereof toward a center portion of the socket member.
10. The buckle according to claim 1 , wherein the guide rod of the plug member extends from the base part to be shorter than the lock arms, a slot is defined from a distal end of the guide rod in the lengthwise direction of the guide rod, a guide rib to be fitted into the slot of the guide rod is formed in the chamber of the socket member in such a way as to connect the upper and lower plates, and a space part is defined in a rear part of the socket member to communicate with the chamber and has indents which are defined in the upper and lower plates so that the space part can be enlarged forward to a portion where the distal end of the guide rod is positioned when the plug member is coupled to the socket member.
11. The buckle according to claim 10 , wherein each of the indents forms an inclined section which gradually decreases in width from the space part and a straight section which is formed from a middle portion of the indent.