Abstract: A watertight key unit includes a key and an elastic sealing part. The key is mounted on a key-mounting wall, extends through a key-inserting hole in the key-mounting wall, and has a peripheral wall. The sealing part extends from a lower end of the peripheral wall of the key, has a peripheral wall that surrounds the peripheral wall of the key, and cooperates with the peripheral wall of the key to define a spacing groove therebetween. The peripheral wall of the sealing part is surrounded by and abuts elastically and sealingly against a hole-defining wall of the key-inserting hole.

Abstract: A method for forming a multi-layer ceramic electronic device includes the steps of (a) forming a circuit layer with a pattern of contacts on a ceramic substrate, (b) forming at least a dielectric blank sheet with a pattern of through-holes on a supporting film, (c) filling each of the through-holes in the dielectric blank sheet with a conductive paste, (d) drying the conductive paste in the through-holes, (e) overlaying the dielectric blank sheet on the circuit layer on the ceramic substrate in such a manner that the through-holes are registered respectively with the contacts, and (f) pressing and heating the ceramic substrate and the dielectric blank sheet.

Abstract: In a voltage converter, a voltage-controlled switching device of a power stage receives a control signal and operates accordingly at a switch-ON mode, where the control signal is a high-level signal, and a switch-OFF mode, where the control signal is a low-level signal. A comparator compares a trigger signal and an input signal associated with an output signal outputted by the power stage, and outputs the control signal, wherein the control signal is the high-level signal when the trigger signal is greater than the input signal, and wherein the control signal is the low-level signal when the trigger signal is less than the input signal. A trigger circuit receives a reference voltage and the control signal, and supplies the trigger signal to enable the comparator to output a periodic pulse signal that serves as the control signal such that the voltage-controlled switch device is activated periodically.

Abstract: In a method and apparatus for controlling current limit of a motor of an electric-powered vehicle, the current limit of the motor is initially set to a smaller first value during start-up operation of the vehicle. Thereafter, in response to operation of a twist-grip throttle of the vehicle to commence accelerating operation of the vehicle subsequent to the start-up operation, the current limit of the motor is increased from the smaller first value to a larger second value larger than the smaller first value in accordance with angular rotation of the twist-grip throttle from an initial position. When the current limit reaches the larger second value, the current limit of the motor is then maintained at the larger second value in case of further operation of the twist-grip throttle from the initial position.

Abstract: In a method and apparatus for controlling current limit of a motor of an electric-powered vehicle, the current limit of the motor is initially set to a smaller first value during start-up operation of the vehicle. Thereafter, in response to operation of a twist-grip throttle of the vehicle to commence accelerating operation of the vehicle subsequent to the start-up operation, the current limit of the motor is increased from the smaller first value to a larger second value larger than the smaller first value in accordance with angular rotation of the twist-grip throttle from an initial position. When the current limit reaches the larger second value, the current limit of the motor is then maintained at the larger second value in case of further operation of the twist-grip throttle from the initial position.

Abstract: A system includes a battery, a motor, a switching circuit that interconnects the battery and the motor, a switch driving circuit that is connected to the switching circuit, and a controller that is connected to the switch driving circuit for controlling operation of the switching circuit in one of a first mode, wherein the motor is configured so as to draw power from the battery and wherein the motor rotates in a positive direction and with a positive torque, and a second mode, wherein the motor is configured so as to supply power to the battery and wherein the motor rotates in the positive direction and with a negative torque.

Abstract: A control device for controlling current to a motor includes a current sensor connected to a power module for generating an electric signal corresponding to magnitude of the current to the motor, and a processor connected to first and second current detecting circuits, which are connected to the current sensor and the power module. The first current detecting circuit determines whether the current to the motor is larger than a first predetermined value, and generates a first flag signal provided to the power module. The second current detecting circuit determines whether the current to the motor is larger than a second predetermined value, which is larger than the first predetermined value, and generates a second flag signal provided to the power module. The power module inhibits connection between the motor and a power supply unit upon receiving either one of the first and second flag signals.

Abstract: A docking base incorporates a speaker unit that includes a speaker casing having a back wall, two opposed lateral walls extending respectively from two opposed lateral edge portions of the back wall, a bottom wall extending between the lateral walls, and a front wall which defines a sound outlet therethrough. The docking base includes an elongated docking frame which has an elongated horizontal portion with left and right ends, and an upright portion which is disposed generally perpendicular to and which divides the horizontal portion into a front section to support a portable computer thereon and a rear section to support the bottom wall of the speaker casing thereon. The upright portion has front and rear walls respectively adjacent to the front and rear sections.