Driving apparatus for shake correction and imaging apparatus using the same

An imaging apparatus, comprising:

• a fixed frame fixed to a main body;
• a shake detector which is fixed to the main body and detects a shake;
• transducers supported by the fixed frame, a contact portion being adhered to each of the transducers;
• a movable frame pressed against the contact portion to be supported thereby;
• a slide body adhered to the movable frame;
• an image sensor fixed to the movable frame;
• a photographing optical system which is supported by the main body and has an optical axis in a direction perpendicular to a support plane formed by the contact portion, the photographing optical system forming an object image on the image sensor;
• and
• a first driving mechanism driven by a motor for moving the movable frame in a direction perpendicular to the optical axis of the photographing optical system;
• wherein the transducers constitute a second driving mechanism for displacing, relative to the fixed frame, the contact portion in the optical axis direction, and
• wherein the second driving mechanism moves the contact portion in the optical axis direction so as to reduce a frictional force between the contact portion and the slide body, and
• wherein the first driving mechanism moves the image sensor so as to compensate the shake based on a signal from the shake detector.

An imaging apparatus, comprising:

• a fixed frame fixed to a main body;
• transducers supported by the fixed frame, a contact portion being adhered to each of the transducers;
• a movable frame pressed against the contact portion to be supported thereby;
• a slide body adhered to the movable frame;
• an image sensor fixed to the movable frame;
• a photographing optical system which is supported by the main body and has an optical axis in a direction perpendicular to a support plane formed by the contact portion;
• the photographing optical system forming an object image on the image sensor;
• and
• a first driving mechanism driven by a motor for moving the movable frame in a direction perpendicular to the optical axis of the photographing optical system;
• wherein the transducers constitute a second driving mechanism for displacing, relative to the fixed frame, the contact portion in the optical axis direction, and
• wherein the second driving mechanism vibrates the contact portion in the optical axis direction so as to reduce a frictional force between the contact portion and the slide body, and the first driving mechanism moves the second member, and the contact portion is changed in vibration amplitude or displacement of the vibration center, so as to displace, relative to the fixed frame, the image sensor in the optical axis direction of the optical system, to thereby detect a focus position.