Abstract: This invention discloses a direction key structure that prevents correlated action, the simultaneous activation of two directions. By using a center shaft for a fulcrum, and in cooperation with four direction ribs set under a direction key housing, the direction key housing can act as a joystick. Four rods for preventing correlated action are set under the key direction housing, and each rod is set between two neighboring direction ribs so that the correlated action is avoided.

Abstract: The present invention concerns to an illuminant button structure that can be set on the front side of a media center extender. The illuminant button structure comprises a button base plate, a light source and a light transmitting button cap. There is a containing chamber on the button base plate in which a fixing groove is set to fix the aforesaid light source. The light transmitting button cap includes a light-entering surface and a light-exiting surface, wherein the light-entering surface forms a light transmitting curved surface and also a ring shaped light display area on the exterior surface; as a result, the light from the light source can be evenly emitted.

Abstract: The present invention concerns to a press key structure with a light module in use of illuminant variation for arrow keys of an appliance. The press key structure with light module comprises a key base plate, a light source, a spread slice and a light guiding cap. The light guiding cap includes a crown part, a chamber, and a mouth part that is set on the key base plate and can exactly cover up the above light source. The spread slice is set in the chamber of the light guiding cap so that the light is evenly spread through the light guiding function of the spread slice. Moreover, by adjusting the thickness, transparency, and inside cambered surface of the spread slice, or the distance between the spread slice and the light source, the light guiding property thereof can be modulated.