Hanging-ring concentric lock

The utility model relates to a hanging-ring concentric lock, in particular to a hanging-ring concentric lock which is used between lovers and has ornamental and symbolic significance, belonging to the technical field of a lock structure. The hanging-ring concentric lock is characterized by comprising two outer rings (1) and (7) which are butt-jointed with each other and have patterns; the upper parts of the two outer rings (1) and (7) are connected and fixed through a front decorative plate (9) and a back decorative plate (10); the lower parts of the two outer rings (1) and (7) are connected into a whole through a locking block (8) which is arranged between the butt joint surfaces; and the hanging ring part is arranged in a hole which is formed by the butt joint of the upper parts of the two outer rings (1) and (7), and is simultaneously connected with the two outer rings (1) and (7) into a whole. The hanging-ring concentric lock has novel design, unique shape, and pattern selection diversity, represents a lo