Patent ID: 7893369
Filing Date: 2011-02-22
Classification: H01H,Y10T

Abstract:
1. A ratchet wheel mechanism, comprising a camshaft circular disc ( a driving cam ( a first pawl ( after the front end surface of said camshaft circular disc and the front end surface of said driving cam engaging each other, said groove ( when said camshaft circular disc being at a control position, said first pawl falling into a positioning slots of said camshaft circular disc to lock said camshaft circular disc at said control position; when said driving cam starting to rotate toward a next control position, said camshaft circular disc staying at its place, said groove ( when said driving cam rotating to the next control position, one of said angular-shaped teeth pushing said first pawl out from one of said positioning slots, said resilient element pushing said camshaft circular disc to turn to the next control position, said second pawl falling into another one of said positioning slots of said camshaft circular disc to lock said camshaft circular disc at the next control position.