Dustproof micro switch

A dustproof micro switch, comprising a base body, an upper cover, and a button, wherein the base body and the upper cover form a box body;

• the upper cover is provided with a first half of through hole for the button, the base body is provided with a second half of through hole for the button, and the first half of through hole for the button and the second half of through hole for the button form a through hole for the button;
• one end of the button is arranged in the box body, and another end of the button extends out of the box body through the through hole for the button;
• the end, extending out of the box body, of the button is provided with a sealing sleeve, a movable contact arm assembly and a movable contact arm support for fixing the movable contact arm assembly are arranged below the end of the button arranged in the box body, and the movable contact arm support is arranged on the base body;
• and
• a terminal assembly in fit with the movable contact arm assembly is further arranged in the box body;
• wherein a cross section of the sealing sleeve is circular, and a diameter of the cross section of an end, close to the box body, of the sealing sleeve is larger than that of the cross section of an end, away from the box body, of the sealing sleeve;
• the upper cover is provided with a first button boss at a position of the first half of through hole for the button, and the base body is provided with a second button boss at a position of the second half of through hole for the button;
• the first button boss is provided with a first button boss outer edge, and the second button boss is provided with a second button boss outer edge;
• a first button clamping groove is formed between the first button boss outer edge and the upper cover, a second button clamping groove is formed between the second button boss outer edge and the base body, and the first button clamping groove and the second button clamping groove form a button clamping groove;
• a button clamping block is arranged on a periphery of a bottom of the sealing sleeve, and the bottom of the sealing sleeve is sleeved outside the button through the fitting of the button clamping block with the button clamping groove;
• a top of the sealing sleeve is provided with a snap-fitting hole, a top of the button is provided with a button outer edge, and the top of the sealing sleeve is sleeved outside the button through the fitting of the snap-fitting hole with the button outer edge.