Contact between the projection 8b on the cam gear 8 and the elastic piece 10a of the sector gear 10 offsets backward torque induced by the engagement of {TAIL ~ the sector gear} with the rack 11, and absorbs {HEAD ~ any mechanical shock} 
Contact between the projection 8b on the cam gear 8 and the elastic piece 10a of the sector gear 10 offsets backward torque induced by the engagement of { TAIL ~ the sector gear } with the rack 11 , and absorbs { HEAD ~ any mechanical shock }
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 TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD