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,
• wherein the cap further includes a pair of outwardly extending portions respectively extending from a pair of opposite sides of the base portion toward an outside,
• wherein the case further includes a pair of cutouts formed on the upper end surfaces of the plurality of wall portions, and
• wherein the pair of outwardly extending portions of the cap are respectively engaged with the pair of cutouts of the case.

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;
• 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;
• and
• a frame attached to the case from the lower side,
• 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,
• wherein the frame includes a bottom plate,
• wherein the case is held between the cover and the frame,
• wherein the top plate of the cover has a substantially square planar shape,
• wherein the cover further includes a pair of welding pieces extending from each of another pair of opposite sides of the top plate toward the lower side,
• wherein the bottom plate of the frame has a substantially square planar shape,
• wherein the frame further includes a pair of welding pieces extending from each of opposite sides of the bottom plate toward the upper side, and
• wherein the pair of welding pieces of the cover are respectively welded to the pair of welding pieces of the frame, and thereby the case is held between the cover and the frame welded to each other.