Patent ID: 8904884

Claim:
A torque sensor, comprising: a cylindrical upper case having one open end; an overload prevention member fixed to the cylindrical upper case to prevent overload; a lower case configured to cover the open end of the cylindrical upper case; an elastic structure member disposed on the lower case to detect deformation; a silicon structure member disposed on the elastic structure member to detect deformation, wherein the elastic structure member is a circular disk shape and includes: an upper fastening portion and a lower fastening portion configured to lock the upper case to the lower case, a plurality of space portions formed between the upper fastening portion and the lower fastening portion into which the silicon structure member is inserted, and a first deformation generation portion disposed between the plurality of space portions and configured to detect deformation of the plurality of space portions; and wherein the silicon structure member is a rectangular plate shape and includes: an external structure inserted into each space portion, an internal structure disposed in the external structure, a second deformation generation portion configured to connect the internal structure to the external structure to generate deformation, and a deformation sensing unit inserted into the second deformation generation portion to detect the deformation.