Abstract: The sudden interlocking and unlocking mechanism of a translation switch comprises a spring interlocking and spring unlocking rocking device associated in line with a toggle joint mechanism used as interlocker. According to one characteristic of the invention the mechanical assembly of the translation switch includes a remote unlocking mechanism. According to another characteristic, the unlocking energy is used to automatically replace the toggle joint mechanism and its composite elements in position ready for engagement of the switch, that is, in position in which the articulation points of the mechanical assembly are aligned in the phase preceding the interlocking operation.