Abstract: An improved foldable pushbutton-input device conformable to human body mechanism, wherein a plurality of assembly-jointing sections is defined by a plurality of properly spaced predetermined cutting lines on a baseboard; a circuit board made of a flexible material having a plurality of pushbutton-input circuit sections in positions corresponding with the assembly-jointing sections and also defined by the same cutting lines is attached on the baseboard; a signal-output circuit section is formed by extending the lateral edges of the pushbutton-input circuit sections and connected therewith; and a plurality of amount predetermined key sets is disposed on the circuit board or on the baseboard in virtue of the division cutting lines to thereby construct the foldable pushbutton-input device with a considerably reduced volume.

Abstract: An improved keyboard structure comprises a base, a pan body, and a top cover. A user is supposed to turn a turnable functional pushbutton to a specified function item, then click the pan body for the computer to execute the related program.

Abstract: An improved positioning structure of pushbutton in keyboard (2) comprises a base, a printed circuit board (PCB) attached on the base having a plurality of pivot-jointing portions protrusively disposed on its surface for defining a plurality of enclosed assembly-jointing sections, a link (bridge) disposed at the assembly-jointing section having a movable shaft axially jointed with the pivot-jointing portion, an elastomer arranged on the link, and a key cap disposed on the elastomer being coupled with a positioning shaft at one end of the link. By assembling the abovesaid components, a waterproof and thinner keyboard at lower cost is realizable.

Abstract: A power supplying system includes a switching control circuit connected to a stand-by power source so as to receive electrical power therefrom. The switching control circuit is further connected to a power-supplying unit and is activated to control operation of the power-supplying unit in a selected one of an ON state, where the power-supplying unit supplies electrical power for operating a heat-dissipating fan, and an OFF state, where the power-supplying unit ceases to supply the electrical power to the heat-dissipating fan.

Abstract: A contact indicating switch includes an actuator body with an upper body portion pivoted to an insulating seat body and a smaller lower body portion. The lower body portion has a downwardly opening bore that terminates at an abutment seat, and a slit communicated with the abutment seat. A biasing spring is received in the bore, and has an upper end with a finger portion extending outwardly of the slit, and a lower end biasing a rolling member to slidably engage an electrically conductive lever between a right position, where a contact end of the lever engages a right electric contact member in the seat body, and a left position, where the contact end disengages the right electric contact member. An electrically activated indicator is received in the upper body portion, and has a first terminal extending downwardly and outwardly of the upper body portion to contact a left electric contact member, and a second terminal extending in the receiving chamber.

Abstract: A load balancer is to be used in a power supplying system which includes at least two power supplying units that are connected in parallel to supply power concurrently to operate an electrical load. The load balancer includes at least two sensors, each of which is adapted to generate an ac sensor output corresponding to power output of a respective one of the power supplying units. Each of at least two rectifying and filtering circuits rectifies and filters the ac sensor output of a respective one of the sensors so as to obtain a corresponding dc sensor output. A microprocessor receives the dc sensor outputs from the rectifying and filtering circuits, and calculates an average input value therefrom that corresponds to a balanced power output for the power supplying units.

Abstract: An ergonomical keyboard assembly includes an upper cover, a lower base plate connected to the cover, and a unitary keyboard. The upper cover includes a hollow frame that confines an opening. The keyboard has a substrate mounted on the base plate below the cover, and a plurality of keys which are mounted on the substrate and which have key caps projecting upward and outward from the cover through the opening. The substrate has a top face which is arched and which protrudes upward. The key caps form an arched overall key surface that projects upward and outward through the opening and that is arched from two ends to an intermediate portion of the opening.

Abstract: An electrical power supply assembly includes a base member, a cover member connected to the base member to confine a space, at least one partitioning plate disposed between the base and cover members to divide the space into a plurality of side-by-side adjacent compartments, a plurality of rails disposed on the base and cover members and the partitioning plate, a plurality of electrical power supply units slidably disposed inside the space and having slide members held slidably by the rails, a rear cover attached to the base and cover members, an electrical circuit board mounted on the rear cover and electrically connected to the power supply units, and an electrical control box disposed outwardly of the space and connected to the base and cover members and the rear cover.

Abstract: A tilt switch includes an insulating switch body with an inner circumferential wall that extends from a top end to a bottom end in an upright direction to define a columnar chamber. Two electrically conductive contact terminals are disposed at an annular seat at the bottom end and are spaced apart from each other in a direction transverse to the upright direction. A movable conductor member is disposed movably in the columnar chamber along the inner circumferential wall. When the switch body stands in line with the upright direction, the conductor member will abut against the annular seat to make electrical connection between the terminals. When the insulating switch body is tilted and deviates from the upright direction, the conductor member will be prompted to move away from the annular seat so as to break the electrical connection.

Abstract: A power supplying apparatus includes a housing with a plurality of storage compartments and a box-receiving compartment. A rear cover is mounted on the housing to close an open rear side of the latter. A circuit board unit is mounted on an inner surface of the rear cover. Each of a plurality of power-supplying units is disposed removably in a respective one of the storage compartments, and has an internal power supply circuit and an internal isolating circuit. A first set of complementary connectors interconnects the power-supplying units and the circuit board unit. A control box has a casing received removably in the box-receiving compartment, and a control circuit disposed in the casing. The control circuit includes a detecting and alarm generating circuit and a load balancing circuit, and is connected to the circuit board unit via a second set of complementary connectors.

Abstract: A computer key includes a base plate, a membrane circuit, a foil sheet, a biasing member, a push button, and first and second linking frames. The base plate includes a first hingeably retaining member and a first slidably retaining guideway spaced from each other in a longitudinal direction and formed with first and second retaining portions for blocking movement in an upward and normal direction. The membrane circuit is disposed on the base plate, and has left and right openings for extension of the first and second retaining portions therethrough. The foil sheet is superimposed on the membrane circuit to sandwich a lower flange on the biasing member therebetween. The first and second linking frames have first and second linking arms connected pivotally at intermediate portions to permit extension of the biasing member such that the latter is disposed between the push button and the base plate.

Abstract: A selective switch includes a switch housing, and a button cap with two opposite side portions. A contact assembly includes first, second and third conductive members which are all fixed in the switch housing. A helical spring is mounted in the switch housing, and has an outer end portion to support the button cap thereon and an inner end portion adjacent to the contact assembly. A flexible mandrel has an inner end portion and an outer end portion which is integrally formed with the outer end portion of the helical spring. The helical spring extends around the flexible mandrel.

Abstract: A contact switch assembly includes a first conductor body which has a leg portion and a U-shaped mounting unit with upward first and second mounting arms and a connecting portion that interconnects the first and second mounting arms. The first and second mounting arms have transverse retaining grooves at opposing outer sides thereof. A movable contact arm includes an elongated contact plate which has a longitudinal opening and which is sleeved around the first and second mounting arms via the opening. The contact plate further has first and second inner edges at two longitudinally opposing ends of the opening. The first inner edge engages the retaining groove of the first mounting arm. A curved spring plate has a first end engaging the retaining groove of the second mounting arm, and a second end engaging the second inner edge so as to bias the second inner edge upward.