VIBRATION ACTUATOR HAVING A STABLE ROTATIONAL DRIVING PERFORMANCE, AND ELECTRONIC APPARATUS
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United States of America Patent
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app pub date -
Mar 18, 2016
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Mar 25, 2015
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Abstract
A vibration actuator difficult to be affected by an external force. A vibration element is held by a shaft. A driven element is held in pressure contact with an elastic body, and a bearing member is joined to the driven element in a manner rotatable about the shaft as a rotational axis. Vibrations excited in the vibration element cause the vibration element and the driven element to rotate relative to each other about the shaft. In the driven element, a connecting portion connects between a main body and a gear provided outside the main body. The degree of freedom of the main body with respect to the bearing member is restricted in other directions than a direction of rotation thereof and a thrust direction of the shaft. The connecting portion has a lower flexural rigidity in a direction parallel to the rotational axis than the main body and the gear.
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