Pump with diaphragms, for e.g. sphygmomanometer has shaft inserted in chamfered fitting hole of rotator to connect pivot component attached to diaphragm and rotator

摘要

A shaft (13) is inserted in a fitting hole (25) of the rotator (24) to connect the pivot component (6) attached to the diaphragm (4) and the rotator. The entrance edge of the fitting hole is chamfered.