Limit switch and linear actuator having the same

A linear actuator (2, 2′) comprising:

• a housing (60, 60′);
• a transmission device (700, 700′) disposed in the housing (60, 60′);
• at least a limit switch (1, 1′), disposed in the housing (60, 60′) and actuated through being contacted by the transmission device (700, 700′), the limit switch (1, 1′) including:
• an insulation housing (10), formed with an opening (11) and plural slots (12);
• a press block (20), disposed on the insulation housing (10) and exposed outside the opening (11);
• a pair of strip-shaped connection pins (30), disposed in the insulation housing (10) and spaced with an interval, and respectively protruded from the slots (12);
• an elastic connection guiding set (40) including an elastic unit (41) pressed by the press block (20) and a connection guiding sheet (42) connected to the elastic unit (41), two ends of the connection guiding sheet (42) being respectively and correspondingly connected to the pair of connection pins (30);
• and
• a diode (50), disposed in the insulation housing (10), and including two guide pins (51), the two guide pins (51) being respectively and correspondingly connected to the pair of connection pins (30) in the insulation housing (10);
• and
• a support plate (90) and a wire (91), wherein the limit switch (1, 1′) is disposed on a lateral surface of the support plate (90), and the wire (91) is disposed on another lateral surface of the support plate (90);
• wherein each of the strip-shaped connection pins (30) integrally forms a saw-tooth protrusion protruded therefrom;
• the two guide pins (51) of the diode (50) are respectively and directly clamped by the saw-tooth protrusions of the connection pins (30), and the saw-tooth protrusions further sequentially penetrate the insulation housing (10) and the support plate (90) to electrically connect to the wire (91).