| 摘要 |
PURPOSE:To make the sure detection possible with simple construction in contact detection by containing a triangular-pyramidal movable body to a casing of a truncated triangular pyramid in inside surface shape, and detecting the off of at least one of the plural contact points between both. CONSTITUTION:A contact 12 is fixed to the peak of a movable body 14 of approximately a triangular pyramid shape, and respectively 3 pieces, 2 pieces and 1 piece of semispherical projecting parts 14e-14j are formed to respective surfaces 14a, 14b, 14c. A casing 16 having an inside surface shape of approximately a truncated triangular pyramid contains a movable body 14, and all of six points of the above-described projecting parts are brought into contact with the inside surface of the casing by the depressing force of a spring 18 between the bottom surface 14k and a receiving cover 17. These contact parts constitute electrical contact points, and the contact of the contactor with an object to be measured is detected when at least one of these goes off. Thus the contact is detected surely and the resetting to the home position without allowing the contactor to rotate is sure. |
