Patent ID: 7755603

Claim:
A coordinate input device comprising: a base having a deformation sensor; a stick that stands upright with a specified height from the base; a rubber cap that can be press-fitted on the stick; a pressure sensor that can be controlled by pushing a control section formed at an upper end of the rubber cap; a dome-shaped metal contact disposed on the pressure sensor; and a driving pin supported by the stick, the driving pin capable of pushing the pressure sensor; and a first sensor board and a second sensor board, wherein when the control section of the rubber cap is pushed, the driving pin is pushed by the elastic deformation of the cavity to reverse the metal contact, the base includes a plurality of notches forming a plurality of ribs operable to be deformed, the deformation of the ribs being detected by the deformation sensor, the first sensor board is fixed to a lower surface of the base, a hole through which the driving pin is inserted is formed through the first sensor board, the deformation sensor is formed on the first sensor board, the second sensor board is disposed under a lower surface of the first sensor board, the metal contact and the pressure sensor are provided on the second sensor board opposite the hole, in an initial state, a front end of the driving pin is in contact with the metal contact through the hole, and the driving pin and the rubber cap are urged upward, when the control section of the rubber cap is pushed, the driving pin slides inside the stick and in the hole of the first sensor board to reverse the metal contact for operating the pressure sensor, and when the pushing is released, the driving pin and the rubber cap slide upward to return to the initial state due to automatic resilience of the metal contact.