Push switch

A push switch, comprising:

• a case including a containing portion defined by a bottom plate and a plurality of wall portions extending from the bottom plate toward an upper side, and a sealing groove formed on upper end surfaces of the plurality of wall portions;
• a pair of contacts provided on the bottom plate of the containing portion so as to be spaced apart from each other;
• a movable contact which is disposed above the pair of contacts in the containing portion and can be displaced between a first position in which the pair of contacts are in a non-conductive state and a second position in which the pair of contacts are in a conductive state;
• a cap for covering the containing portion of the case from the upper side, the cap including a base portion disposed on the upper end surfaces of the plurality of wall portions of the case, a protruding portion protruding from the base portion toward the upper side, and a sealing protrusion protruding from a peripheral edge portion of the base portion toward a lower side for liquid-tightly sealing the sealing groove of the case;
• and
• a cover attached to the case from the upper side so as to hold the cap on the case, the cover including a top plate and an opening which is formed in the top plate and through which the protruding portion of the cap passes,
• wherein the sealing protrusion of the cap is compressively deformed in the sealing groove of the case in a state that the cap is held on the case by the cover, and thereby the sealing groove of the case is liquid-tightly sealed.