Keyswitch assembly

A keyswitch assembly, comprising:

• a base plate;
• a circuit board disposed on the base plate;
• a keycap disposed on the circuit board;
• at least one pressing mechanism movably connected to the base plate and the keycap respectively;
• at least one elastic member disposed between the keycap and the circuit board, wherein a first distance between a top surface of the keycap and a top surface of the base plate at a first position corresponding to the at least one elastic member is less than a second distance between the top surface of the keycap and the top surface of the base plate at a second position distal to the at least one elastic member;
• and
• a supporting member engaged with a bottom surface of the keycap, wherein the supporting member has a rib protruding from a main body of the supporting member;
• a balance supporting frame surrounding the supporting member and being movably connected to the base plate and the keycap respectively;
• and
• wherein the supporting member made of a metal plate covers at least 50% of the bottom surface and has an opening corresponding to an engaging portion protruding from the bottom surface of the keycap to couple with the at least one pressing mechanism.