Keyswitch

A keyswitch comprising:

• a board;
• a cap having a long axis;
• a lifting mechanism disposed between the board and the cap, the cap being movable between a pressed position and a non-pressed position relative to the board via the lifting mechanism, the lifting mechanism comprising a first plate and a second plate, the first and second plates being opposite to each other, the first plate being pivotably connected to the board and abutting against the cap, the first plate having a first middle section and a first tail section, the second plate having a second middle section and a second tail section, the first middle section and the second middle section being adjacent to a center point of the long axis, the first tail section and the second tail section being adjacent to a terminal point of the long axis;
• a returning device located between the first plate and the second plate, the returning device comprising a first magnetic member and a second magnetic member, the first magnetic member extending from the first middle section toward the second plate, the second magnetic member being disposed on the board corresponding to the first magnetic member, an abutting part extending from the second middle section toward the first plate to abut under the first magnetic member;
• a first block formed on one of the cap and the first tail section to be spaced from the other one of the cap and the first tail section;
• and
• a second block formed on one of the cap and the second tail section to be spaced from the other one of the cap and the second tail section;
• wherein when the cap is pressed to deform the first plate and the second plate, the first tail section and the second tail section slide relative to the cap to a position where the other one of the cap and the first tail section abuts against the first block and the other one of the cap and the second tail section abuts against the second block, for limiting the abutting part to be located under the first magnetic member when the cap is released;
• when the cap is not pressed, a magnetic attraction force between the first magnetic member and the second magnetic member keeps the cap at the non-pressed position;
• when the cap is pressed to move the first magnetic member away from the second magnetic member with pivoting of the first plate relative to the board and tilt the abutting part, the cap moves from the non-pressed position to the pressed position together with the lifting mechanism;
• when the cap is released, the magnetic attraction force drives the first magnetic member to approach the second magnetic member to move the cap from the pressed position back to the non-pressed position together with the lifting mechanism.