Patent ID: 8109182

Claim:
A ratchet tool comprising: a main body having a handle and an actuating end, said actuating end having a round groove with a circular tooth row formed on an inner periphery of said round groove; a tool driving seat rotatably mounted onto one side of said round groove, said tool driving seat having a tool driving portion at an external end thereof, said tool driving seat having an internal end facing said round groove, said tool driving seat having a first braking slot and a second braking slot and a control slot triangularly configured onto an internal surface of said tool driving seat, said first braking slot being in spaced relation to said second braking slot, said control slot being an arc aligned with said circular tooth row, said control slot having a through-hole opening at opposite ends thereof, said through-hole separately connected to said first and second braking slots, said control slot having an open-ended exterior that is connected with said circular tooth row; a first braking swing block positioned in said first braking slot, said first braking swing block having an outer tip edge and an inner tip edge arranged laterally thereon, said outer tip edge facing an external opening of said first braking slot corresponding to said circular tooth row, said inner tip edge facing said through-hole corresponding to said control slot, said first braking swing block having a first pivoted portion about which said first braking swing block swings; a second braking swing block positioned into said second braking slot, said second braking swing block having an outer tip edge and an inner tip edge arranged laterally thereon, said outer tip edge of said second braking swing block facing an external opening of said second braking slot corresponding to said circular tooth row, said inner tip edge of said second braking swing block having a second pivoted portion about which said second braking swing block can swing; an elastic resetter assembled between said first and second braking swing blocks, said elastic resetter suitable for driving ends of said first and second braking swing blocks such that the inner tip edges thereof swing inward in a normal state; a movable control gear movably positioned in said control slot, said movable control gear having one side mated with said circular tooth row, said movable control gear shiftable to said through-hole so as to simultaneously mate with the inner tip edge of said first or second braking swing blocks and said circular tooth row, said movable control gear having a brake rod protruding outwardly of said control slot; and a cover covering one side of said round groove of said tool driving seat, said cover having an arched hole through which said brake rod extends.