Keyswitch and illuminated keyswitch

A keyswitch, comprising:

• a keycap;
• a pair of U-shaped frames adapted to support the keycap in an up-down movement, each of the pair of U-shaped frames having a pair of side arms extending in parallel and a pair of bend structures respectively disposed on middle sections of the pair of side arms, the pair of bend structures of one of the pair of U-shaped frames correspondingly coupled to the pair of bend structures of the other of the pair of U-shaped frames, so the pair of U-shaped frames is rotatably coupled to each other along an axial line, and the four side arms of the pair of U-shaped frames constitute two sets of side arms arranged apart from each other in parallel to define an inner space under the keycap between the two sets of side arms;
• and
• a pair of elastic members connecting the pair of U-shaped frames, the pair of elastic members disposed in parallel beside the two sets of side arms so as to be located at two opposite sides of the inner space, respectively,
• wherein the pair of elastic members connects the pairs of U-shaped frames along a direction perpendicular to the axial line,
• wherein during the up-down movement of the keycap, a vertical projection of the pair of U-shaped frames and a vertical projection of the pair of elastic members surround the inner space without interfering therewith.

An illuminated keyswitch, comprising:

• a keycap;
• a pair of frames adapted to support the keycap in an up-down movement, the pair of frames disposed corresponding to each other and substantially rotatably coupled to each other at middle sections of the pair of frames to define an inner space under the keycap;
• a pair of elastic members connecting the pair of frames to be located at two opposite sides of the inner space, respectively;
• an illumination light source disposed between the pair of elastic members in the inner space and adapted to provide an illumination light;
• and
• an optical switch having an optical signal path,
• wherein an extension line of the optical signal path passes through the illumination light source between the pair of elastic members,
• wherein during the up-down movement of the keycap, a vertical projection of the pair of frames surrounds the inner space without interfering therewith, so the illumination light passes the inner space to illuminate the keycap.