Patent 7692528 was granted and assigned to Panasonic on April, 2010 by the United States Patent and Trademark Office.
A rotary electronic component is capable of preventing misalignment of another component placed in its hollow portion and maintaining the quality of an electronic device on which to mount the rotary electronic component. The rotary electronic component has an approximately annular shape with a hollow portion. The other component placed inside the hollow portion is positioned by the positioning member formed inside the hollow portion.