Patent ID: 7956515

Claim:
A driving method for a driving apparatus which comprises an electro-mechanical transducer having a first end surface and a second end surface opposite to each other in an expansion/contraction direction, a vibration friction portion mounted to the second end surface of said electro-mechanical transducer, said vibration friction portion having a V-shaped groove in cross section, a moving member frictionally coupled to said vibration friction portion, said moving member including first and second rod-shaped moving bodies which sandwich said vibration friction portion therebetween at the V-shaped groove thereof, and a vibration transfer member disposed between the second end surface of said electro-mechanical transducer and an end surface of said vibration friction portion, said driving method driving said moving member due to expansion/contraction of said electro-mechanical transducer so as to move said moving member in the expansion/contraction direction of said electro-mechanical transducer, said driving method comprising: subjecting said electro-mechanical transducer to reciprocating displacement in a sawtooth waveform; and transferring the reciprocating displacement of said electro-mechanical transducer to said vibration friction portion through said vibration transfer member, thereby linearly driving said moving member in a predetermined direction.