Wrench for use with ratchet function, has pressure surface that is formed in form of spherical surface at end of sliding piece, where siding piece protrudes pressure surface from jaw surface

摘要

The wrench has a pressure surface (21) that is formed in the form of a spherical surface at an end of a sliding piece (20). The siding piece protrudes the pressure surface from a jaw surface (16). A concave annular groove (112) is formed at an inner wall of a retainer opening (111). A clamping element (30) is designed as an annular body with extendable outward spring force. An outer circumferential surface of annular body is inserted into the annular groove. An inner circumferential surface of the ring body is protruded from the annular groove.