Disconnecting switch

The invention provides a switch gear (100), which comprises a shell (1), a driving mechanism, a cam (3), at least one elastic bias mechanism (34) and at least one slider (5, 6); the cam (3) is provided with a first joint part (31) and a second joint part (32) which are selectively jointed by the driving mechanism so as to allow the cam (3) to rotate correspondingly along a first direction and a second direction opposite to the first direction; each slider (5, 6) is provided with a body (51) and at least one wing part (52, 53) extending from the radial direction of the body (51); the cam (3) comprises a groove or gap (33), which is used for containing the at least one wing part (52, 53) in an idle stroke manner; the cam (3) can rotate relative to the at least one slider (5, 6), and is connected with the at least one wing part (52, 53) so as to drive the at least one slider to rotate; the switch gear (100) is also provided with a retention mechanism (7).