A key structure which is adjustable in pressing force required and in duration of key pushback includes a circuit board, a keycap, a first magnetic member, an elastic member, a membrane switch, and a second magnetic member. The keycap includes an extending portion. The membrane switch is spaced apart from the first magnetic member, and the elastic member buffers the first magnetic member against the membrane switch. The second magnetic member is disposed between the membrane switch and the circuit board. When energized, the second magnetic member generates magnetic attraction or magnetic repulsion to the first magnetic member. A pressing force required on the key structure and a rebound force and a delay of rebound can be dynamically adjusted by a direction and magnitude of a current applied to the second magnetic member. A key device including the key structure is also disclosed.

A small form-factor input device operative to be coupled to an electronic device using a cable may include a circuit board; a first electrical switch disposed on a first side of the circuit board; a second electrical switch disposed on a second side of the circuit board; a frame defining a periphery, wherein the circuit board is maintained within the periphery of the frame; first and second shells that house the circuit board, the first shell placed over the first side of the circuit board, and the second shell placed over the second side of the circuit board; and at least one clip coupled to each one of the first shell and the second shell, wherein the at least one clip is operative to engage the frame.

A small form-factor input device operative to be coupled to an electronic device using a cable may include a circuit board; a first electrical switch disposed on a first side of the circuit board; a second electrical switch disposed on a second side of the circuit board; a frame defining a periphery, wherein the circuit board is maintained within the periphery of the frame; first and second shells that house the circuit board, the first shell placed over the first side of the circuit board, and the second shell placed over the second side of the circuit board; and at least one clip coupled to each one of the first shell and the second shell, wherein the at least one clip is operative to engage the frame.

A modern two-handed keyset that can produce text, text editing functions, and computer functions. The two-handed keyset device here comprises of a first keyset and second keyset. Each keyset comprises of a plurality of keys connected to an edge plate. The individual keys are attached to the edge plate by their individual top edges and the keys are capable of deflecting independently from each other. The two keysets are connected by a communication tether configured to electronically connect the first keyset and second keyset. Corresponding systems and methods also are disclosed.

A modern two-handed keyset that can produce text, text editing functions, and computer functions. The two-handed keyset device here comprises of a first keyset and second keyset. Each keyset comprises of a plurality of keys connected to an edge plate. The individual keys are attached to the edge plate by their individual top edges and the keys are capable of deflecting independently from each other. The two keysets are connected by a communication tether configured to electronically connect the first keyset and second keyset. Corresponding systems and methods also are disclosed.

A keyboard device includes a bottom cover, a supporting plate, a flexible circuit board and plural key structures. The supporting plate is installed on the bottom cover. The supporting plate has a curved arc-shaped profile that is bent upwardly in a direction away from the bottom cover. The supporting plate includes plural perforations. The flexible circuit board is arranged between the bottom cover and the supporting plate. The plural key structures are installed on the supporting plate. The plural key structures are penetrated through the corresponding perforations and contacted with the flexible circuit board.

A keyboard device includes a bottom cover, a supporting plate, a flexible circuit board and plural key structures. The supporting plate is installed on the bottom cover. The supporting plate has a curved arc-shaped profile that is bent upwardly in a direction away from the bottom cover. The supporting plate includes plural perforations. The flexible circuit board is arranged between the bottom cover and the supporting plate. The plural key structures are installed on the supporting plate. The plural key structures are penetrated through the corresponding perforations and contacted with the flexible circuit board.

A keyboard includes a backlight module, a base plate, a membrane circuit disposed on the base plate, and a plurality of key structures disposed on the membrane circuit. The backlight module includes a light source, a reflective layer, a light guide layer, and a shielding layer. The light source is disposed corresponding to the light guide layer. The light guide layer is located between the shielding layer and the reflective layer. The light guide layer has a through-hole. The shielding layer and the reflective layer are in contact with each other in the through-hole of the light guide layer. The base plate is disposed on the shielding layer. The base plate has a positioning portion disposed corresponding to the through-hole of the light guide layer, which protrudes toward the reflective layer or the membrane circuit.

A keyboard includes a backlight module, a base plate, a membrane circuit disposed on the base plate, and a plurality of key structures disposed on the membrane circuit. The backlight module includes a light source, a reflective layer, a light guide layer, and a shielding layer. The light source is disposed corresponding to the light guide layer. The light guide layer is located between the shielding layer and the reflective layer. The light guide layer has a through-hole. The shielding layer and the reflective layer are in contact with each other in the through-hole of the light guide layer. The base plate is disposed on the shielding layer. The base plate has a positioning portion disposed corresponding to the through-hole of the light guide layer, which protrudes toward the reflective layer or the membrane circuit.

A keyboard including a base plate, a plurality of keycaps, a plurality of supporting structures and a membrane switch element is provided. The base plate has a through hole. The keycaps are disposed on the base plate. The supporting structures are respectively disposed between the keycaps and the base plate. The membrane switch element is disposed on the base plate. The vertical projection of two adjacent keycaps of the keycaps relative to the base plate overlaps the through hole, and the membrane switch element has a shielding portion covering the through hole.