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Pressure sensitive element and a stylus pen with pressure sensitive function

  • US 5,633,471 A
  • Filed: 02/22/1995
  • Issued: 05/27/1997
  • Est. Priority Date: 01/13/1995
  • Status: Expired due to Term
First Claim
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1. A pressure sensitive element formed substantially in a disk shape comprising:

  • a pressure sensitive member, in an annular plate shape,a pressure transmitting member, in an annular plate shape, for transmitting pressure applied in the axial direction of the pressure sensitive element;

    the pressure sensitive member being arranged coaxially with the pressure transmitting member along the axial direction; and

    a support member for supporting the pressure sensitive member, the pressure sensitive member being between the support member and the pressure transmitting member, and being arranged coaxially with the pressure transmittable member along the axial direction,the electrode having an annular plate shape,the variable resistor being made of pressure sensitive conductive rubber,the pressure sensitive conductive rubber including non-conductive elastomer, fine carbon spherical particles having a diameter of 1 to 20 μ

    m and hollow elastic microspheres having a diameter of 10 to 150 μ

    m, which particles and microspheres are both dispersed in the elastomer.

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