Patent ID: 11908640
Assignee: MITSUMI ELECTRIC CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. 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 case further includes a pair of cover lock portions formed on each of a pair of opposite wall portions among the plurality of wall portions and being apart from each other,
wherein the cover further includes a pair of engagement extending portions respectively extending from a pair of opposite sides of the top plate toward the lower side,
wherein each of the pair of engagement extending portions includes a pair of leg portions extending from a side of the top plate toward the lower side and being spaced part from each other, and a lock portion for connecting lower end portions of the leg portions,
wherein outer lateral surfaces of the pair of the leg portions of the engagement extending portions extending from the side of the top plate are respectively engaged with inner lateral surfaces of the pair of the cover lock portions formed on a wall portion of the case, and
wherein an upper end surface of the lock portion of the engagement extending portion extending from the side of the top plate is engaged with lower end surfaces of the pair of the cover lock portions formed on the wall portion of the case.