Vibrational wave motor, lens barrel and camera

A vibrational wave motor comprising:

• a motor main body;
• and
• a pressing member,
• wherein the motor main body comprises:
• an electromechanical conversion element configured to be excited by a driving signal;
• an elastic body configured to be joined to the electromechanical conversion element and generate an oscillating wave by an excitation thereof;
• and
• a relative motion member configured to be in pressure contact with the elastic body and rotationally driven relatively with respect to the elastic body by the oscillating wave,
• wherein the pressing member is configured to generate a pressing force between the elastic body and the relative motion member, and
• wherein the pressing member comprises:
• a pressure applying portion configured to press one of the elastic body and the relative motion member towards the other, along a rotation axis of rotational driving;
• an extension portion configured to extend from the pressure applying portion towards an outer side in a radial direction centered about the rotation axis;
• and
• a pressing main body disposed further to the outer side in the radial direction than the motor main body at the extension portion, wherein
• the extension portion is configured to extend in a plurality of radial directions from the pressure applying portion, and the pressing main body is provided at respective ends of the extension portion.

A vibrational wave motor comprising:

• a motor main body;
• and
• a pressing member,
• wherein the motor main body comprises:
• an electromechanical conversion element configured to be excited by a driving signal;
• an elastic body configured to be joined to the electromechanical conversion element and generate an oscillating wave by an excitation thereof;
• and
• a relative motion member configured to be in pressure contact with the elastic body and rotationally driven relatively with respect to the elastic body by the oscillating wave,
• wherein the pressing member is configured to generate a pressing force between the elastic body and the relative motion member, and
• wherein the pressing member comprises:
• a pressure applying portion configured to press one of the elastic body and the relative motion member towards the other, along a rotation axis of rotational driving;
• an extension portion configured to extend from the pressure applying portion towards an outer side in a radial direction centered about the rotation axis;
• and
• a pressing main body disposed further to the outer side in the radial direction than the motor main body at the extension portion,
• wherein the extension portion comprises a plate spring, wherein
• the extension portion comprises a first portion and a second portion,
• an end at the outer side in the radial direction of the first portion is configured to be continuous with the second portion extending parallel to the rotation axis, and
• a stiffness of the second portion is higher than a stiffness of the first portion.