| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an electronic pen capable of evading the interference of a regular ultrasonic wave due to a reflected ultrasonic wave from a screen surface in a receiving part. <P>SOLUTION: The electronic pen 10 is constituted of a body part 11 and a pointing part 12, the body part 11 comprises a base part 111 and an expansion and contraction operation part 112 allowed to be engaged with the base part 111 and rotated around the base part 111 and a hollow part 113 is formed inside the base part 111 and the expansion and contraction operation part 112. The pointing part 12 has a shape allowed to be slid in the hollow part 113 formed in the inside of the base part 111 without being rotated, an expansion means consists of a female screw formed on the hollow part 113 of the expansion and contraction operation part 112 and a male screw formed on the outer surface of the pointing part 12 so as to be engaged with the female screw, and when the pointing part 12 inserted into the body part 11 is expanded by the rotation of the expansion and comtraction operation part 112, a distance difference between a direct wave route from an ultrasonic wave generation part 16 formed in the expansion and contraction operation part 112 and a reflected wave route is changed to prevent the occurrence of interference. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
