Button switch

A button switch, comprising:

• a main body comprising a switch member, the switch member having a start portion and a stop portion;
• a start button disposed on the main body to drive the start portion;
• a stop button disposed on the main body to drive the stop portion, wherein the stop button has a first position and a second position, in a normal state, the stop button is located at the first position and doesn't drive the stop portion, when the stop button is pressed the first time, the stop button is moved from the first position to the second position to drive the stop portion, when the stop button is pressed the second time, the stop button is returned to the first position;
• the main body further comprises an outer casing on top of the stop button, the outer casing has a bottom provided with a plurality of circular poles, and each of the circular poles is fitted with a spring and elastically against the stop button;
• and
• the bottom of the outer casing is provided with a protrusion which is disposed close to the stop button, a top end of the guide rod is formed with a press plate, and the press plate has a concave top surface corresponding to the protrusion.