Patent ID: 8184109

Claim:
A coordinate input device comprising: a position detecting device having an input surface; and a position indicator for indicating its own position relative to the input surface, wherein the position indicator comprises: a housing; a rod housed in the housing and having a pen-tip projected to the outside of the housing; and a variable capacitor for detecting a pressing force applied to the pen-tip, wherein the variable capacitor comprises: a chassis having an opening opened on one face thereof and a main face portion located opposite the opening, the main face portion having a through-hole formed therein; a dielectric housed in the chassis and having a hole extending from a first surface to a second surface thereof, the second surface being opposite the first surface; a first terminal inserted into the hole formed in the dielectric and the through-hole formed in the main face portion, one end of the first terminal being exposed to the outside of the chassis from the main face portion and the other end of the first terminal having a pin head portion abutting the first surface of the dielectric; a second terminal having a first electrode portion interposed between the second surface of the dielectric and the main face portion of the chassis, and a terminal portion exposed to the outside of the chassis from the main face portion, the first electrode portion forming one electrode of the variable capacitor; a conductive elastic member disposed so as to be able to contact the first surface of the dielectric, the conductive elastic member serving as a second electrode by being pressed toward the first surface of the dielectric by the pressing force applied to the pen-tip, the second electrode forming the other electrode of the variable capacitor; and a biasing member for bringing the second surface of the dielectric into contact with the first electrode portion.