The dual-switch housing is configured to secure two separate switches on a rail interface system and includes an actuator that allows an end-user to activate both switches individually or simultaneously. An example dual-switch housing comprises: a housing including rail clamp portions for removably mounting the dual-switch housing to the rail interface system; and an actuator configured to actuate the first and second switches individually or simultaneously. The actuator comprises a first actuation button configured to actuate only the first switch, a second actuation button configured to actuate both the first switch and the second switch, and a third actuation button configured to actuate only the second switch.

A key structure includes a base, a bracket, a sensing circuit, an elastic member, a key cap, and a screwing member. The bracket is disposed on the base, the sensing circuit is disposed on the bracket, and the sensing circuit has an opening. The elastic member is disposed on the sensing circuit and covers the opening. The key cap is disposed on the elastic member. The screwing member passes through the opening and screws the bracket to the base, and the key cap, the elastic member, and the screwing member are coaxially arranged. In addition, a portable computer.

A layer-structured, open-design keyboard includes a main body and a tray attached to the main body from below. The main body has key mechanisms and keycaps mounted on tops of the key mechanisms. The main body includes an upper-layer plate, a middle-layer plate, a circuit board, and a lower-layer plate arranged from a top to a bottom of the main body successively in a spaced manner, so as to define three clearance spaces that communicate the interior of the main body with the exterior.