Instrument for automatic measurement of compressive force for eye examinations

摘要

The cylindrical or four-edged carriage (8) is guided outside the tube. The pressure body (7) is positioned on the end of a bar-shaped support (6) which is mounted centrally along the tubular axis of the carriage using two congruent plate spring elements (4,5) axially spaced apart by a set amount. The plate spring elements consist of an inner ring (1) fixed to the support, and an outer ring (3) fixed to the carriage. At least three, pref. four, arms radiate at a tangent from equidistant contact points on the inner ring. The rings are rigid in a radial direction, and are connected by springs in an axial direction. Wire strain gauges (18) are positioned on the arms.