US Patent 7703333 Deformation sensor

A deformation sensor, which has excellent workability and a high degree of freedom in shape design and which can detect deformation and load in a wide area of components and portions, has a main body of sensor, electrodes which are connected to the main body of sensor and can output electric resistances, and a restraining component which restrains elastic deformation of at least a part of the main body of sensor. The main body of sensor has an elastomer, and spherical conductive fillers which are blended into the elastomer at a high filling rate in an approximately single-particle state, and is elastically deformable. In the main body of sensor, as an elastic deformation increases, the electric resistance increases.