Keyswitch and illuminated keyswitch

1. An illuminated keyswitch, comprising:

a keycap;

a pair of frames adapted to support the keycap in an up-down movement, each of the pair of frames having a pair of side arms 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 frames correspondingly coupled to the pair of bend structures of the other of the pair of frames, so the pair of frames is rotatably coupled to each other 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; and

an illumination light source disposed between the pair of elastic members in the inner space and adapted to provide an illumination light,

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.

2. The illuminated keyswitch of claim 1 , further comprising an optical member disposed between the illumination light source and the keycap and configured to modulate an optical property of the illumination light.

3. The illuminated keyswitch of claim 1 , wherein the pair of side arms of one of the pair of frames and the pair of side arms of the other of the pair of frames are alternatingly disposed along an axial line.

4. The illuminated keyswitch of claimer 1 , wherein the pair of bend structures comprises a receiving portion and a pressing portion; the pressing portion of one of the pair of frames interacts with the receiving portion of the other of the pair of frames, and the receiving portion of the one of the pair of frames interacts with the pressing portion of the other of the pair of frames.

5. The illuminated keyswitch of claim 1 , further comprising an optical switch having an optical signal path, and the illumination light source is disposed in a straight line with the optical signal path.

6. The illuminated keyswitch of claim 5 , wherein one of the pair of frames has a blocking portion configured to selectively block the optical signal path in response to a movement of the pair of frames.

7. The illuminated keyswitch of claim 5 , further comprising a light shield at least partially shielding the optical switch to separate the optical switch and the illumination light source.

8. The illuminated keyswitch of claim 7 , wherein the optical switch comprises an emitter and a receiver; the emitter emits an optical signal to the receiver; the light shield has a baffle configured to separate the emitter and the receiver; the baffle has a slit for the optical signal to pass therethrough.

9. The illuminated keyswitch of claim 1 , wherein each of the pair of frames has a keycap end and a baseplate end, and each of the pair of the elastic members connects the baseplate ends of the pair of frames.

10. The illuminated keyswitch of claim 9 , wherein the baseplate end of one of the pair of frames is closer to the keycap end of the other of the pair of frames than the baseplate end of the other of the pair of frames.

11. The illuminated keyswitch of claim 10 , wherein during the up-down movement of the keycap, the pair of elastic members substantially does not move up-down with the keycap.

12. The illuminated keyswitch of claim 9 , wherein the pair of frames is substantially identical; each of the pair of frames is a U-shaped frame with the pair of side arms; the pair of frames is disposed corresponding to each other to substantially avoid an illumination area of the illumination light without interfering with the illumination light.

13. The illuminated keyswitch of claim 12 , wherein each of the pair of frames has an extension portion at the keycap end; the extension portion extends from one of the pair of side arms, so the extension portion of one of the pair of frames corresponds to one of the pair of side arms of the other of the pair of frames, and the pair of frames has a substantially rectangular contour in a plan view.

14. 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.

15. The keyswitch of claim 14 , wherein the pair of side arms of one of the pair of U-shaped frames and the pair of side arms of the other of the pair of U-shaped frames are alternatingly disposed along the axial line.

16. The keyswitch of claim 14 , further comprising an optical switch having an optical signal path; one of the pair of U-shaped frames has a blocking portion configured to selectively block the optical signal path in response to a movement of the pair of U-shaped frames.

17. The keyswitch of claim 14 , wherein the pair of U-shaped frames is substantially identical; each of the pair of U-shaped frames has a keycap end and a baseplate end; the baseplate end of one of the pair of U-shaped frames is closer to the keycap end of the other of the pair of U-shaped frames than the baseplate end of the other of the pair of U-shaped frames; each of the pair of the elastic members connects the baseplate ends of the pair of U-shaped frames.

18. The keyswitch of claim 17 , wherein each of the pair of U-shaped frames has an extension portion at the keycap end; the extension portion extends from one of the pair of side arms, so the extension portion of one of the pair of U-shaped frames corresponds to one of the pair of side arms of the other of the pair of U-shaped frames.

19. 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.