Longitudinal switch for electric contact locking and position changing system

a LONGITUDINAL SWITCH, comprising:

• a movable rack (1) with rails (2);
• a terminal (3) formed on a first end of the movable rack (1), wherein the terminal (3) has a couple of inner coupling pins (4), a pair of movable elements (7) having channels (6), a couple of springs (5) mounted respectively on the couple of inner coupling pins (4) and respectively inserted into the channels (6) with the couple of inner coupling pins (4);
• a sprocket (8) mounted on a second end, which is opposite to the first end, of the movable rack (1), the sprocket (8) having a vertical axis (9) extended perpendicularly to the movable rack (1), an upper end (10) of the vertical axis (9) being formed with a threaded hole (11);
• a lower bracket (12) with a cradle (13) and coupling ridges (14), wherein the sprocket (8) is set in the lower bracket (12);
• a detachable surface rail (15) formed with a plurality of fixed contacts (16) and a plurality of notches (18), the detachable surface rail (15) being inserted through the rails (2) and the plurality of notches (18) being engaged with the coupling ridges (14) of the lower bracket (12), and thus the detachable surface rail (15) being locked onto the movable rack (1);
• wherein the plurality of fixed contacts (16) each have a body portion extended from a side of the detachable surface rail (15) and a semi-circular head (17) extended from an opposite side of the detachable surface rail (15);
• wherein the vertical axis (9) receives an upper bracket (19) and a main bracket (22), and the sprocket (8) is enveloped by the upper bracket (19) and the main bracket (22), wherein the main bracket (22) has a threaded nozzle (23) to expose the threaded hole (11) formed on the upper end (10) of the vertical axis (9), the threaded nozzle (23) is equipped with an outer conduit (24), a ring stopper (25) and a spacer receiver (26).