Patent ID: 7770495

Claim:
A ratchet connector comprising: a driving element, which has a driving section for connecting to and driving a hand tool and an extending section, wherein the extending section has an open groove in the radial direction, both sides of the open groove have a sidewall, respectively, each of the sidewalls has a protruding part, the open groove is disposed with a tooth block whose both ends have a concave part, respectively, corresponding to the protruding parts of the sidewalls so that the tooth block is controlled to move along the bottom of the open groove, the end surface of the tooth block opposite to the open groove bottom has a guiding surface and an arc surface, and both sides of the arc surface have a plurality of teeth; a control ring, which is mounted on the extending section of the driving element, in the vicinity of the driving section, wherein the control ring has an inner ring surface with a blind hole, the blind hole has an elastic element whose one end urges against the bottom of the blind hole and whose other end urges against the guiding surface of the tooth block, thereby controlling the tooth block to move along the bottom of the open groove; and a working element, which has a working section for the connection of a working object and a ratchet coupling section mounted on the extending section of the driving element and in the vicinity of the control ring, wherein the ratchet coupling section has an annular inner surface corresponding to the extending section, the inner surface has a plurality of ratchet teeth around it, and the curvature of the arc surface on the tooth block matches with that of the inner surface so that the teeth on the tooth block are controlled to engage the ratchet teeth on the inner surface.