A ring binder

A ring bracket comprises a basically is a hard box body; the box body and a clamping block; the plate at least is provided with two annular, the measuring block of the pivoted with the second positions transfer motion of the first position; and first position circularly uniformly and a lock, and second position circularly uniformly distributed without air the locking, wherein affects powerfully at least one ring; the binding ring without air the locking, wherein the plate connected to the second position of the first position; and movement of the upper lifting hook; when affects powerfully on the ring; The locking board is curves of the first position of the moving to second position.