Patent ID: 6840217

Claim:
A device for restoring a rotary member to a defined basic position, comprising a three-dimensional fixed fixation cam ( 13 ) that predetermines the basic position, a slaving cam ( 14 ), which is coupled with the rotary member and is movable past the fixation cam ( 13 ), said cams ( 13 , 14 ), each having one stop face ( 131 , 132 , 141 , 142 ) each on sides facing away from one another, and a clamp spring ( 18 ) which embraces the cams ( 13 , 14 ) with prestressing by way of two bent-away spring legs ( 181 , 182 ) each reaching past the stop faces ( 131 , 132 , 141 , 142 ) of the cams ( 13 , 14 ), at least one spring leg ( 181 ) having at least one leg segment countersunk in at least one of the cams ( 14 ) so far that in the basic position, with a leg segment fitting over the other cam ( 13 ), it rests without play on the stop face ( 131 ) of the other cam ( 13 ).