Safety switch

A safety switch, in particular for motor circuits of manufacturing machines and electric motors, comprising a casing (1) within which it is housed an activation key (2), a pair of respective first and second contact-holding elements (10, 11), and a triad consisting of a central (6), a first (7) and a second (9) electric terminals emerging from said casing, said contact-holding elements (10, 11) being oscillating about the same oscillation axis (O-O) between two positions, a passive position and an active position respectively, each element (10, 11) being disposed in a tilting manner around an end of a corresponding, respectively first and second, laminar support (6, 8), each of said positions being imposed by a corresponding position of said activation key (2) rotating around a rotation axis (R-R) parallel to said oscillation axis (O-O), the central terminal (6) of said triad being in permanent electric contact with one (10) of said contact-holding elements (10, 11), said first (7) and second (9) terminals being each alternately separated or in electric contact with the corresponding first and second contact-holding element (10, 11) depending on the position of said key (2), the contact-holding element (10, 11) being closed upon the corresponding terminal (7, 9) in a passive position and separated therefrom in an active position and vice versa, said switch being wherein said contact-holding elements (10, 11) are mutually electrically connected through conductive elements that are movable with respect to one another by relative displacement of mating surfaces (17a, 18a) in mutual contact.