The present invention relates to a keyboard, including a baseboard, connecting elements, and replaceable keys. The replaceable key includes a connecting plate and a key cap. The connecting plate has a first fixing portion, and the key cap has a second fixing portion. The connecting element is separately connected to the baseboard and the connecting plate, and the key cap and the connecting plate may be combined by means of the first fixing portion and the second fixing portion. Therefore, the user does not contact a connecting element when disassembling a key cap, so that the connecting element is not damaged and the key cap is easy to disassemble and assemble.

An operator control system includes switches, RFID transponders, and a RFID reader. Each switch has a cap support and a switch cap. The switch caps are respectively interchangeably attachable to the cap supports. The RFID transponders are respectively attached to the switch caps. Each RFID transponder stores a respective piece of information identifying a respective control function so that the switch cap to which the RFID transponder is attached is associated with the respective control function. The RFID reader is arranged on at least one of the switches for reading the piece of information of at least one of the RFID transponders.

A device includes an engaging portion, a controller component, and a plurality of actuators. The engaging portion is configured to mechanically engage with at least one switch assembly. The plurality of actuators are capable of being actuated by the switch assembl(ies) when it/they are engaged with the engaging portion and depressed. The controller is configured to detect a first pattern of the plurality of actuators actuated at a time and responsively recognize a first type of switch assembly. The controller is also configured to detect a second (different) pattern of the plurality of actuators actuated at a time and responsively recognize a second (different) type of switch assembly.

An improved switch-type key structure includes a support plate, a microswitch, a connection element, and a key cap. The microswitch is fixed onto the support plate and is electrically connected thereto. The connection element is movably disposed on the support plate. The connection element includes a balance portion and a support portion extending downward from the balance portion. The key cap is disposed on the balance portion. The connection element is disposed between the support plate and the key cap through the microswitch, a hook hole corresponding to the support portion is disposed on the support plate, a hook is disposed at a distal end of the support portion, and the hook passes through the hook hole to engage the connection element with the support plate. Accordingly, the key cap is stressed evenly, returns instantly after being depressed, and is prevented from vibrations/wobbles.

An improved switch-type key structure includes a support plate, a microswitch, a connection element, and a key cap. The microswitch is fixed onto the support plate and is electrically connected thereto. The connection element is movably disposed on the support plate. The connection element includes a balance portion and a support portion extending downward from the balance portion. The key cap is disposed on the balance portion. The connection element is disposed between the support plate and the key cap through the microswitch, a hook hole corresponding to the support portion is disposed on the support plate, a hook is disposed at a distal end of the support portion, and the hook passes through the hook hole to engage the connection element with the support plate. Accordingly, the key cap is stressed evenly, returns instantly after being depressed, and is prevented from vibrations/wobbles.

An operator control system includes switches, RFID transponders, and a RFID reader. Each switch has a cap support and a switch cap. The switch caps are respectively interchangeably attachable to the cap supports. The RFID transponders are respectively attached to the switch caps. Each RFID transponder stores a respective piece of information identifying a respective control function so that the switch cap to which the RFID transponder is attached is associated with the respective control function. The RFID reader is arranged on at least one of the switches for reading the piece of information of at least one of the RFID transponders.

The present invention provides a keycap, which includes a lower plate and an upper cover. The lower plate has at least two engaging holes recessed inwardly from an upper surface of the lower plate and separated from each other. The upper cover is configured to be detachably assembled on the lower plate, in which the upper cover has at least two buckle members disposed on an inner top surface of the upper cover and respectively corresponding to the at least two engaging holes, and each of the buckle members has two buckle portions separated from each other, and each of the buckle portions has a protrusion protruding laterally outward, and each of the protrusions is configured to engage with a portion of the corresponding engaging hole.