Patent ID: 8451011

Claim:
An electrostatic capacity-type sensor comprising: a plate-shaped, elastically bending-deformable reference member; and a pair of elastically bending-deformable sensor elements arranged on both sides of said reference member, wherein: each of the sensor elements has a dielectric film made of an elastomer and a pair of electrodes arranged via said dielectric film; said pair of electrodes have an elastomer and a conductive filler blended in said elastomer, and are expansible/contractible depending on the deformation of said dielectric film, and exhibit a small change in the conductivity even when expanded and contracted; an elastic deformation of respective surface of one of said pair of electrodes in said sensor elements is restrained by said reference member; and utilizing a fact that the increase/decrease of the film thickness of said dielectric film on both the sides of said reference member becomes reverse during bending-deformation, said bending-deformation is detected based on a difference between an electrostatic capacity change in one of said sensor elements and an electrostatic capacity change in the other of said sensor elements.