Contact structure for switch and pressure switch using the same

A contact structure for a switch comprising:

• a pair of contacts that are opposed to each other to open or close the switch by allowing the contacts to come into contact with or to separate from each other, wherein
• a contact surface of a first contact is formed into a concave shape provided with at least two projections and a recess,
• a contact surface of a second contact is formed into a convex-curved surface, and
• planes of two projections in the first contact and the convex-curved surface of the second contact are configured to come into line contact with each other while the first contact is configured to not contact the convex-curved surface of the second contact in an area of the recess;
• and
• a movable terminal comprising:
• a fixed portion formed of a conductive flat plate;
• a movable contact plate that is formed of an elastic material and has a first end and a second end, wherein the first end of the movable contact plate is connected to the fixed portion;
• and
• a movable contact disposed on a first portion of the movable contact plate at the second end of the movable contact plate, wherein the movable contact is rigidly fixed to the moveable contact plate,
• wherein the movable contact plate is configured to be inclinable to thereby allow the convex-curved surface to be in contact with at least one of the two projections, and
• wherein the movable contact is either the first contact or the second contact and a hole is disposed in a second portion of the movable contact plate located adjacent to the first portion of the movable contact plate and spaced apart from the first end of the movable contact plate.