Patent ID: 7633212

Claim:
A driving apparatus comprising: an electro-mechanical conversion element; a driving member, connected to an end side of the electro-mechanical conversion element by an adhesive, that moves in response to extension and contraction of the electro-mechanical conversion element; a driven member frictionally engaged with the driving member, so as to cause the driven member to travel along the driving member; a main body supporting the driving member for movement; and a weight member that is heavier than the driving member is connected to an end side of the electro-mechanical conversion element by an adhesive, the weight member being connected in such a state that the weight member is not supported or fixed to the main body of the driving apparatus, wherein a treatment for increasing adhesive force to greater than that before treatment is applied to an adhesive surface by a cleaning treatment or a mechanical treatment, the adhesive surface comprises an area whose surface roughness is Ra 1 μm or more which is to be attached to the adhesive, on at least one of the electro-mechanical conversion element and the weight member.