| 摘要 |
<p>PURPOSE:To take out coil inductance in succession and to effectively detect the writing pressure of an input pen by providing magnetic cores divided in two pieces in the inside of the coil of the input pen, setting the magnetic core on one side in a fixed state and enabling the magnetic core on the other side to be advanced/retracted corresponding to the writing pressure. CONSTITUTION:An elastic body 253 is mounted on the upper part of a pen point 26 by holding between a first ferrite core 251 and a second ferrite core 252. The second ferrite core 252 out of those two ferrite cores 251, 252 is fixed on a housing 20. The coil 21 is provided in the periphery of the two ferrite cores 251, 252, and the ferrite core can be advanced/retracted corresponding to the depression of the input pen on the tablet by changing the inductance of the coil successively according to the fluctuation of the first ferrite core 251 in the up-and-down direction. In this way, it is possible to effectively detect the writing pressure of the input pen.</p> |
