Abstract: Provided is a backup power supply comprising at least one DC/DC power electrically connected to a DC power source for taking DC current therefrom prior to providing regulated DC current, at least one AC/DC power electrically connected to an AC power source for taking AC current therefrom prior to providing rectified DC current, and a power control device including a power balance unit, a power output circuit, and a detection circuit each interconnected the AC/DC power and the DC/DC power. The power control device can combine DC current from both the AC/DC power and the DC/DC power prior to providing to an electronic device (e.g., computer). The invention can continue providing electricity to the computer in the event of not only a malfunctioning of the AC/DC or DC/DC power but also a power outage of either the AC or DC power source.

Abstract: A rotary structure for radiation fans mainly includes a seat for housing a radiation fan and two brackets coupling with the seat to hold two sleeves. The two sleeves are coupled with two rotary ends of a spindle of the radiation fan to confine the spindle to rotate about a single axis. Thereby the spindle can rotate without skewing while the radiation fan is operating, and impact and noise generation can be prevented.

Abstract: A mechanical wheel instruction apparatus to replace the conventional wheel structure that uses a grating switch to output signal. The invention has a mechanical conductive terminal set to output instruction signals when become conductive. The apparatus of the invention has a wheel which has a rotation side with convex sections located on the perimeter in an equally spaced manner. Every two neighboring convex sections are interposed by a concave section. A base board is provided to electrically connect to a contact leg assembly which has a forward contact leg and a reverse contact leg located on the convex sections and a common contact leg located on the concave section. When the wheel is subject to a force and rotates, the convex section pushes the forward contact leg and the reverse contact leg to contact the common contact leg to output a forward rotation instruction and a reverse rotation instruction. The invention may be fabricated at a lower cost than the grating switch and save installation space.

Abstract: A pushbutton mechanism for keyboards includes a bridge in a pushbutton that has an inner frame and an outer frame to make the pushbutton movable up and down. The inner frame and outer frame are intersected and coupled together, and have respectively inner side brackets and outer side brackets that have a stub shaft and a pivot portion to form a relative turning relationship. The inner and outer side brackets have respectively harness bosses and harness recesses corresponding to each other to allow the pushbutton to form a lifting position and a lower position in normal conditions. The bridge thus formed can generate a steadier relative turning and confine the stroke distance for the pushbutton.

Abstract: A piezoelectric power supply includes a power supply unit to provide DC intermediate voltage power output to drive a high voltage output unit of a first load through a first piezoelectric plate and a low voltage output unit of a second load through a second piezoelectric plate. Thereby the power supply can provide a low voltage secondary power output to reduce cost and improve power output flexibility and efficiency. It can be used on display devices such as gas discharge lamps, and also provide additional low voltage secondary power for peripheral devices such as speakers, lamps, ear sets, USB connection ports and the like.

Abstract: A multi-instruction switch includes a base, a control disk, a plurality of electrodes and a conductive element. The control disk is located above the base and can rotate relative to the base to issue instructions. The conductive element is bent to form a common contact end in the middle portion and a first contact end and a second contact end on two ends to connect respectively to a common electrode, a first electrode and a second electrode. By rotating the control disk, a guiding portion located on an inner peripheral rim of the control disk can move the conductive element in a biased manner so that the common electrode and the first electrode or the second electrode are electrically connected to generate a leftward or rightward rotational instruction. Meanwhile a rotational click is produced. The structure is simple and the fabrication cost is lower.

Abstract: A power supply having an extendable power input port connecting to a connection line to be installed on a side wall of a computer host. The side wall and the power supply form a heat dissipation passage therebetween to improve heated airflow in the computer host and increase heat dissipation effect without affecting electric plugging of the power supply.

Abstract: An input device adopts a low cost and simple terminal design to replace the conventional grating and instruction switch structures that are costly and complicated. The input device includes a braced rotary member turnable, tiltable leftwards and rightwards, and movable upwards and downwards for selected displacements and an instruction mechanism located within the displacements to receive forces and be driven by the rotary member to generate instructions. The instruction mechanism has abutting mechanical terminals to contact with each other to generate instruction signal output.

Abstract: The present invention discloses an improved electrode structure of planar lamp, which applies to the planar lamp that has a gas-discharge cavity with at least a bending channel and with a discharge gas and a fluorescent material equipped thereinside. Via disposing an electrically conductive element, which traverses the bending channels, onto the discharge electrodes on the external wall of the gas-discharge cavity, the input area of the power output by the discharge electrodes is increased, and thus, the light uniformity of the planar lamp is achieved.

Abstract: A keyboard without ghost keys has a circuit which includes a microprocessor in which a plurality of I/O lines form a keyboard scanning matrix. Two of the I/O lines on the matrix cross to define a plurality of signal switches. The microprocessor is electrically connected to a primary level resistance and a reference potential to determine the ON condition of the signal switches. Each signal switch further is electrically connected to at least one secondary level switch which is electrically connected to the primary level switch in a serial manner. When a user depresses any three signal switches on the rectangular angles of the keyboard scanning matrix, the connecting primary level resistance and the secondary level resistance form a new level resistance. The new level resistance and the current flowing to the keyboard scanning matrix are processed to get a potential smaller than the reference potential, thereby to eliminate the phenomenon of ghost keys.

Abstract: A structure of a flexible element has a force-receiving portion and a fixing portion, wherein the force-receiving portion is extended to have two arms for connecting with the fixing portion, so as to form two bending portions therebetween, characterized in that an inner end point is defined inside the fixing portion and the inner edges of the fixing portion are extended from the inner edges of the bending portion and intersected at the inner end point, so that a force-distributing section is defined between the bending portion and the inner end point, for distributing the torque applied on the bending portion, so as to eliminate the problem of too much concentrated stress.

Abstract: A scroll wheel device with a thin film type command switch mainly replaces conventional optical grating switch during rotation of a wheel for outputting a signal. The thin film type command switch is a flexible circuit board, and is provided with a circuit arrangement corresponding to a rotating trajectory of the wheel. The wheel is provided with a pressing portion which is simultaneously driven during rotation of the wheel and pressing the thin film type command switch for outputting different command signals. The thin film type command switch of the present invention can decrease the manufacturing cost and save the installation space of the scroll wheel device.

Abstract: A chain reaction control circuit for parallel power supply provides greater power without changing the design of the original power supply structure. It includes a control unit to receive a first power actuation signal output from a power actuation unit, then output multiple sets of second power actuation signals to parallel power supplies. The multiple power supplies that are coupled in parallel receive the second power actuation signals and transform electric power simultaneously, then output electric power. After the electric power transformation has been finished, first power confirmation signals are output from the power supplies to the control unit which receives the first power confirmation signals and outputs a second power confirmation signal to a linked load. And the power supplies supply the corresponding and matching electric power to a linked load.

Abstract: An anchor structure for fans mainly to fasten a fan to an installation object without damaging the fan structure includes coupling members for fastening through holes formed on the corners of the fan. Each of the coupling members includes a first fastening element running through the through hole from the rear end thereof and a second fastening element running though the front end of the through hole to engage with the first fastening element so that the coupling members are fastened securely to maintain the fan structure in an integrated manner to perform normal operation.

Abstract: A simplified pushbutton switch includes a circuit board which has a signal circuit consisting of a common contact and at least one signal contact, a main bracket which has an anchor end on one end to couple with the circuit board and a force receiving end on another end formed by extending the anchor end through at least one bend point that is movable reciprocally about the anchor end which serves as an axis, and a conductive member which is located on the main bracket and has at least two legs corresponding to the signal circuit. The force receiving end can receive an external force to move towards the circuit board about the bend point such that the two legs are driven to connect the common contact and the signal contact to form a conductive condition to output at least one command signal.

Abstract: A power supply to provide operation power for cooling fans includes a non-stop power system to provide DC power in normal conditions to a remote switch control circuit to set a computer in an ON or OFF condition. The non-stop power system also outputs the DC power to a fan actuation control circuit to drive a rear end cooling fan. The fan actuation control circuit and the remote switch control circuit are bridged by a cooling delay unit. The cooling delay unit receives a computer ON/OFF signal from the remote switch control circuit and outputs another signal to enable the cooling fan to operate for a period of time before stopping.

Abstract: A master-slave control architecture for inverters includes a master control circuit board which has a master control unit to output a plurality of frequency signals of the same phase and same frequency so that driving units on a plurality of separated slave control circuit boards on the rear end can be driven synchronously by the frequency signals to control electricity input of transformation units to transform voltage for outputting. Thereby the frequency of the driving electricity of the discharge lamps can be synchronized to maintain uniform luminance.

Abstract: A protection control circuit for discharge lamps aims to control protection signals input to a load at a rear end of a high voltage output zone that are generated during abnormal conditions. The high voltage output zone has a control unit and a driving unit, and a switch device interposed between them to receive a first voltage distribution signal output from the control unit and output a plurality of second voltage distribution signals corresponding to the number of the driving devices. Each of the driving devices is connected to a high voltage output zone line of the discharge lamp that feeds back a protection signal to the switch device. The switch device determines a first electricity condition or a second electricity condition of each high voltage output zone line of the discharge lamps that is connected to the individual driving device.

Abstract: A feedback circuit for push-pull inverters aims to improve the existing push-pull inverters that provide input electricity to a discharge lamp at a phase difference of 180 degrees without feedback electricity to regulate frequency signals and cannot effectively control uniform luminance of the discharge lamp. The invention includes a feedback device to get a detection electricity of the driving electricity of the discharge lamp through non-contact coupling induction. The detection electricity is transformed by the feedback device and output to a frequency control unit. The control unit can regulate and output the frequency signal in response to the luminance of the discharge lamp to timely adjust input electricity of a push-pull inverter.

Abstract: The present invention relates to a control circuit of power supply with selectable current-limiting modes. Via a select circuit in the control circuit of the power supply of the present invention, the user himself can select and switch the operating mode of the current-limiting compare circuit to be one to one, one to multiple, multiple to multiple, or multiple to one mode in order to enable the loads to be compared by an individual set or integrated sets of current-limiting compare circuits; thereby, according to the power usage conditions of the various combinations of the loads, the user himself can select and switch the current-limiting mode in just a single power supply of the present invention, and further, the manufacturer is needless to fabricate variant specifications of power supplies.