A circuit protection apparatus includes separable contacts, an operating mechanism, an electronic trip unit storing a plurality of trip parameter combinations, wherein each of the trip parameter combinations specifies a certain value for each of a plurality of individual trip parameters, and a multi-position selector moveable among a plurality of predetermined positions and configured to enable selection of one of the predetermined positions. Each of the positions corresponds to a respective one of the trip parameter combinations, wherein the electronic trip unit is structured to, responsive to a chosen one of the plurality of predetermined positions being selected by the multi-position selector, cause the one of the trip parameter combinations corresponding to the chosen one of the plurality of predetermined positions to be used by the electronic trip unit to determine whether to cause the operating mechanism to trip open the separable contacts.

A light guide body rotates integrally with an operation knob, has an incident surface that is a concavely curved surface recessed to a side opposite to a light source side, and rotates about a rotation shaft located so as to intersect the incident surface of the light guide body. The incident surface of the light guide body is a concavely curved surface recessed toward the side opposite to the light source (toward a Z1 direction) on a cross-section taken along an X-Z plane.

A luminous keyswitch includes a keycap having a light-transparent portion, a baseplate, an up-down mechanism with two ends respectively moveably connected to the keycap and the baseplate, a function sheet disposed on or under the baseplate, and a light source disposed on the function sheet within a vertical projection of the keycap and connected by a copper wire to provide a light illuminating the light-transparent portion. The function sheet includes a flexible upper circuit layer having a first contact point, a flexible spacer layer having a hole, and a flexible lower circuit layer having a second copper contact point, a third copper contact point, a first copper wire connected to the second copper contact point, and a second copper wire connected to the third copper contact point. When the keycap is pressed, the first contact point passes through the hole to electrically connect the second and third copper contact points.

A method of manufacturing an emergency lamp switch is provided. The method includes printing a symbol on a film using inks of a plurality of colors and injection-molding an emergency lamp switch body on a symbol print surface of the film. The symbol print surface is transferred to the emergency lamp switch body and the film from the emergency lamp switch body is removed.

A method for displaying an on-screen keyboard is applied a computing device connected to a physical keyboard and a screen, where the physical keyboard includes a plurality of keycaps capable of responding to a touch on the keycap to output a first key signal and responding to a keystroke on the keycap to output a second key signal to the computing device, and the method for displaying an on-screen keyboard includes: displaying an on-screen keyboard on a topmost layer of a display image of the screen; reading the first key signal output by the physical keyboard corresponding to the touch on the keycap; and displaying, according to the first key signal, a first key mark at a position corresponding to the touched keycap on the on-screen keyboard.

A touch control keyboard includes a plurality of keycaps, a plurality of touch key parts, a plurality pairs of conductive distributions, a first circuit board, and a second circuit board. An upper part of each keycap includes a touch key part having a coupling capacitor. The touch key parts and the pair of conductive distributions and the first circuit board are electrically connected. The first circuit board detects the coupling capacitors of the touch key parts by using the pair of conductive distributions to generate a first key signal. The second circuit board detects keystrokes of the keycaps to generate a second key signal.

A knob device includes a knob body, a graphic plate, and a light source. The knob body has a hollow space and has an end equipped with a screen. The graphic plate has multiple graphic windows including graphic symbols, respectively. The light source is configured to emit light through both at least one of the graphic windows and the hollow space to project at least one of the graphic symbols on the screen. The graphic plate is movable to switch the at least one of the graphic symbols to another of the graphic symbols.

A keycap structure includes a keycap body and a display module. The keycap body includes a top wall and a lateral wall. The lateral wall is extended downwardly from a periphery region of the top wall. An accommodation space is defined by the top wall and the lateral wall collaboratively. The display module is disposed within the accommodation space. The display module includes a light-transmissible circuit substrate and plural light-emitting elements. The plural light-emitting elements are installed on the light-transmissible circuit substrate and electrically connected with the light-transmissible circuit substrate. After the light beams are transmitted through the light-transmissible circuit substrate and the top wall sequentially, the light beams are outputted from the keycap body. The light beams from the plural light-emitting elements are collaboratively formed as a luminous zone. Moreover, a pattern corresponding to the luminous zone is shown on the display module.

A haptic keyboard of an information handling system comprising a coversheet to identify keys of the haptic keyboard, a contact foil and a piezoelectric element to receive an applied mechanical stress at a first key of the coversheet and generate an electric actuation signal. A processor executing instructions of a haptic smart typing assistance system to detect and anticipate a next letter of a word being typed and a controller to receive an instruction of the anticipated next letter and increasing force required actuate at least one key for a letter adjacent to the anticipated next letter, and to send a response haptic feedback control signal to the piezoelectric element to cause the piezoelectric element to generate a first haptic feedback at the first key if the anticipated next letter is selected and to generate a second haptic feedback if a typographical error is detected.

A keyswitch device includes a bottom plate, a keycap, and a position-returning member. The keycap includes a metal cover and a covering member. The metal cover includes a first main body. The first main body has a first surface and a second surface respectively facing toward and facing away from the bottom plate. The first surface presents a pattern. The covering member includes a second main body covering the first surface. The second main body has a light-transmitting area covering the pattern. The position-returning member is disposed between the bottom plate and the keycap and contacts the first main body.