{HEAD ~ A concaved area} 35 is defined in {TAIL ~ the inner periphery} of the ring 30 and when the two pawls 51 are located in the concaved area 35, the ratchet teeth 512 extend outward as shown in FIG 4 
{ HEAD ~ A concaved area } 35 is defined in { TAIL ~ the inner periphery } of the ring 30 and when the two pawls 51 are located in the concaved area 35 , the ratchet teeth 512 extend outward as shown in FIG 4
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH