Patent ID: 7380482

Claim:
A high-strength ratchet structure comprising: a driving block, said driving block having a stepped axial hole cut through front and rear sides thereof, and two sliding grooves transversely formed on the front side and arranged in parallel at two sides of said stepped axial hole; two pairs of directional block members respectively movably mounted in said sliding grooves of said driving block; two spring members respectively mounted in said sliding grooves of said driving block and respectively supported between the associating directional block members; a ratchet member coupled to said driving block, said ratchet member having an axial screw hole, a plurality of teeth arranged around the inside wall thereof, and a rectangular coupling rod for securing a socket for turning bolts and nuts; a hollow screw bolt mounted in said stepped axial hole of said driving block and threaded into the axial screw hole of said ratchet member to secure said ratchet member to said driving block; and a direction control ring mounted on said driving block around said directional block members and rotatable relative to said driving block to control engagement between said directional block members and the teeth of said ratchet member, said directional control ring having a plurality of protruding portions and recessed portions alternatively arranged around an inner diameter thereof for selectively acting against said directional block members to control engagement between said directional block members and the teeth of said ratchet member.