| 摘要 |
<p>A switching operation in a rotational direction is performed by deforming a contact spring by a cam fixed in such a manner as to follow to a button shaft so as to connect electrodes, and a switching operation in a pressing down direction is performed by deforming a contact spring provided at a lower end of the button shaft so as to connect an electrode. Further, a rotational direction returning spring and a pressing direction returning spring are provided in an inner portion of the button, thereby automatically returning the button to a predetermined position. Further, the structure is made such that at a time of the button rotating operation, a lower surface of an outer wall of the button comes close to an upper surface of a button receiving table provided in a case so as to be layered in a plane manner, thereby preventing a switch function from being erroneously operated. <IMAGE></p> |
