| 摘要 |
Provided is a limit switch having high detection sensitivity. Thus, the limit switch opens and closes a contact by using a plunger supported movably in the vertical direction in a housing to drive the top end of an operation shaft (30) exposed from the ceiling surface of a switch main body (20) housed in the housing. In particular, a displacement expanding mechanism (40) is disposed that comprises a pair of pivoting tongue pieces (46, 47) respectively supported pivotably by a pair of support shafts (43, 44) disposed in parallel between the plunger and the switch main body (20), the free end of one of the pivoting tongue pieces (46) contacts the top end of the operation shaft (30), while the free end of the remaining other pivoting tongue piece (47) contacts the top surface of the one pivoting tongue piece (46), and the upper surface thereof contacts the bottom end of the plunger. |
