Abstract: A wafer grinding parameter optimization method and an electronic device are provided. The method includes the following. A natural frequency of a grinding wheel spindle of wafer processing equipment is obtained, and a grinding stability lobe diagram is generated accordingly. A grinding speed is selected based on a speed range of the grinding wheel spindle. Multiple grinding parameter combinations are determined based on the grinding speed. Multiple grinding simulation result combinations corresponding to the grinding parameter combinations are generated. A specific grinding parameter combination is selected based on each of the grinding simulation result combinations, and the wafer processing equipment is set accordingly.

Abstract: A touchpad device includes a substrate and a touch panel. The substrate includes a main plate, a first limiting plate, and a first flexible member. The main plate has a long side and a short side. The first limiting plate has a first stopping portion, the first flexible member is integrally connected between the long side and the first limiting plate, and the first limiting plate is adjacent to the short side. The touch panel is disposed above the substrate. The touch panel has a bottom surface, a pivot side of the bottom surface is disposed on the main plate, the first limiting plate of the substrate is fixed on the bottom surface and adjacent to a first side of the bottom surface, and the first stopping portion of the first limiting plate protrudes from an edge portion of the first side.

Abstract: A charging structure of an unsheltered electric vehicle has a vehicle with at least a frame, a handling unit and a power unit. The power unit has an output terminal which is one side connected with a mobile and rotary cover by a holding strip to have a water-tight protection, an adapting unit which connects the power unit via the output terminal, and an insertion part which is a movable connection with the output terminal. A rotary cover provides a rotatable connection and a water-tight protection for both combinations of the insertion part and above-mentioned output terminal, a power cord which is electrically connected with the insertion part, and at least a connector electrically connected with the other end of the power cord.

Abstract: This invention relates to an improved charger for vehicle use including an plug of cigarette lighter; a first power cord with one end electrically connected to the plug of cigarette lighter; a transformer that is electrically connected to another end of the first power cord; a second power cord with one end connected to the transformer and has an insertion terminal at another end; and a connection unit with insertion hole at one end to be electrically connected to the insertion terminal of the second power cord, and another end of the connection unit is configured with an insertion part which can easily and conveniently work with various prior-specified power adapter of portable electronic devices.

Abstract: This invention relates to an energy feedback device for the warm-up test of a power supply, which includes a power supply, a current limiter, a transformer and a selector. Moreover, the power supply is a target load tested by a warm-up procedure; external input power enters the selector, and the other end of the selector is electrically connected to the power supply. The current limiter is used to adjust the warm-up power consumed by the load of the power supply under testing. One end of the current limiter is electrically connected to another end of the power supply, and another end of current limiter is electrically connected with the voltage adapter; and another end of the voltage adapter is electrically connected to another end of the selector. Therefore, the device of this invention can effectively provide enhancing the efficiency of power is consumption, over-current protection and multiple application of energy feedback.