Abstract: A key structure includes a bottom plate, a first actuator and a keycap. The first actuator is disposed on the bottom plate and engaged with the keycap to make the keycap movably reciprocating along an actuating direction perpendicular to the bottom plate. Wherein, one of the first actuator and the keycap has a first slot; and the other one of the first actuator and the keycap has a first plug. The first plug is inserted in the first slot in parallel to the actuating direction. One of the first slot and the first plug includes at least one first protruding portion, which protrudes perpendicularly to the actuating direction and is conformally engaged with the other one of the first slot and the first plug.

Abstract: A key stabilizer is provided, in which the key stabilizer includes a keycap and a balance bar. The keycap has a bottom surface and two protruding portions disposed thereon. The keycap moves back and forth along a vertical direction between a top position and a bottom position. Each of the two protruding portions has an engaging portion at the end thereof. The bottom surface faces the bottom position, and the two protruding portions are arranged along a horizontal direction that is perpendicular to the vertical direction. The balance bar has a hinge portion and two side portions respectively connected to both ends of the hinge portion. The hinge portion is positioned on a rotation axis parallel to the horizontal direction. The end of each of the two side portions that is away from the hinge portion is inserted into the engaging portion.

Abstract: A key stabilizer is provided, in which the key stabilizer includes a keycap and a balance bar. The keycap has a bottom surface and two protruding portions disposed thereon. The keycap moves back and forth along a vertical direction between a top position and a bottom position. Each of the two protruding portions has an engaging portion at the end thereof. The bottom surface faces the bottom position, and the two protruding portions are arranged along a horizontal direction that is perpendicular to the vertical direction. The balance bar has a hinge portion and two side portions respectively connected to both ends of the hinge portion. The hinge portion is positioned on a rotation axis parallel to the horizontal direction. The end of each of the two side portions that is away from the hinge portion is inserted into the engaging portion.

Abstract: A waterproof keyboard includes a lower housing, a circuit membrane disposed on the lower housing, a pressure plate disposed on the circuit membrane, an elastomer member, an upper housing disposed on the elastomer member and a plurality of key caps disposed on the upper housing. The pressure plate has a main body formed with a plurality of openings and ridges. The elastomer member has a plurality of switch domes disposed in the openings correspondingly, a base layer disposed on the main body, and a plurality of raised portions disposed on the ridges respectively. The ridges of the pressure plate presses tightly to the underside of the raised portions. The pressure plate is constructed to evenly support the elastomer member.

Abstract: A slim key structure includes a lower case having at least one positioning slot, a flexible membrane disposed on the lower case, an upper case dispose on the flexible membrane, a keycap and an elastic piece. The flexible membrane has a post opening corresponding to the positioning slot. The upper case has at least one hollow guiding cylinder and a central passage. The guiding cylinder is protruded upwardly and downwardly from the upper case, and the downward protruding portion of the guiding cylinder is received in the positioning slot. The keycap has at least one guiding post and a pushing stem protruding downwardly from a bottom surface thereof. The guiding post is reciprocably received in the guiding cylinder. The elastic piece is disposed between the keycap and the flexible membrane in the central passage depressable by the pushing stem against the flexible membrane.

Abstract: A waterproof keyboard includes a lower housing, a circuit membrane disposed on the lower housing, a pressure plate disposed on the circuit membrane, an elastomer member, an upper housing disposed on the elastomer member and a plurality of key caps disposed on the upper housing. The pressure plate has a main body formed with a plurality of openings and ridges. The elastomer member has a plurality of switch domes disposed in the openings correspondingly, a base layer disposed on the main body, and a plurality of raised portions disposed on the ridges respectively. The key caps abut to the switch domes respectively. The raised portions of the elastomer member are fixed to the bottom surface of the upper housing, while the ridges of the pressure plate presses tightly to the underside of the raised portions. The pressure plate is constructed to evenly support the elastomer member.

Abstract: A slim key structure includes a lower case having at least one positioning slot, a flexible membrane disposed on the lower case, an upper case dispose on the flexible membrane, a keycap and an elastic piece. The flexible membrane has a post opening corresponding to the positioning slot. The upper case has at least one hollow guiding cylinder and a central passage. The guiding cylinder is protruded upwardly and downwardly from the upper case, and the downward protruding portion of the guiding cylinder is received in the positioning slot. The keycap has at least one guiding post and a pushing stem protruding downwardly from a bottom surface thereof The guiding post is reciprocably received in the guiding cylinder. The elastic piece is disposed between the keycap and the flexible membrane in the central passage depressable by the pushing stem against the flexible membrane.

Abstract: A wireless input device includes a top housing and a receiver. The top housing has an accommodating slot concavely formed thereon. The receiver has a receiving circuit module and an electrical connector arranged beneath the receiving circuit module. The electrical connector is detachably arranged in the accommodating slot. A key-shaped receiver which includes a key cap, a receiving circuit module arranged adjacent to a bottom side of the key cap, and an electrical connector electrically connected to the receiving circuit module.

Abstract: A keyswitch structure has a slender key cap and an integral balance structure for a key with a short press stroke. The keyswitch structure has a casing and at least one key. The casing has at least one pair of hooks arranged on a bottom face thereof, and at least one receiving groove. The key has a key cap, a connection portion parallel extended from a bottom portion of the key cap, and a balance rod integrally arranged on an end side of the connection portion. The balance rod has two sides arranged in the two hooks, respectively. The present invention can simplify the assembly steps, and efficiently prevent the key from swinging and being wedged.

Abstract: A keyswitch structure has a slender key cap and an integral balance structure for a key with a short press stroke. The keyswitch structure has a casing and at least one key. The casing has at least one pair of hooks arranged on a bottom face thereof, and at least one receiving groove. The key has a key cap, a connection portion parallel extended from a bottom portion of the key cap, and a balance rod integrally arranged on an end side of the connection portion. The balance rod has two sides arranged in the two hooks, respectively. The present invention can simplify the assembly steps, and efficiently prevent the key from swinging and being wedged.