Load sensing structure

摘要

A load sensor is provided which may be employed as a pointing device controlling a position indicator on a display screen. The load sensor includes a mount base, an elastic plate, an operating shaft, and a plurality of strain gauges. The elastic plate secured on the mount base. The operating shaft is made of an elastic material and installed at a first end thereof on the elastic plate so as to be bent in response to application of a load to a second end opposite the first end, producing an elastic force to deform the elastic plate. The strain gauges are attached to the elastic plate symmetrically around the operating shaft and responsive to the deformation of the elastic plate to change resistance values thereof, which indicates the magnitude and direction of the applied load.