Abstract: A coil module is provided, including a second coil mechanism. The second coil mechanism includes a third coil assembly and a second base corresponding to the third coil assembly. The second base has a positioning assembly corresponding to a first coil mechanism.

Abstract: A portable voltage converter comprises a casing, an AC input and an AC output, and a voltage conversion circuitry; the AC input is connected to the voltage conversion circuitry, the input voltage is convened by the voltage conversion circuitry and connected to the AC output; the voltage conversion circuitry includes a low power voltage conversion circuitry and a high power voltage conversion circuitry; the low power voltage conversion circuitry has a core transformer, the operating current circuitry includes a current overload protector, the voltage waveform after voltage conversion is called the first waveform. The high power voltage conversion circuitry has a TRIAC, the voltage waveform after voltage conversion is called the second waveform. When the required power for the connected external load is high, the current overload protector reduces the output of the first waveform, so that the second waveform is actuated and output.

Abstract: An universal plug adapter with multiple retractable pin plugs, comprising: a main body, at least a set of pin plug, an orientation guide rod allowing sliding of pin plug and a slide block restricting the shift of pin plug; the pin plug comprises of at least a pair of pins of international standard size, of which a single pin plug can be pushed every time; a sliding groove is set laterally onto the slide block; the groove is deep upwards and shallow downwards; the pin plug is provided with a bulge; when the pin plug is pushed, the bulge moves along the groove of the slide block groove; given the different depth of the groove, the bulge pushes the slide block to shift, such that the bulges on other pin plug cannot be aligned with the center of the groove, so other pin plugs not yet pushed are restricted in original position.

Abstract: A universal plug adapter, comprising: a main body, at least a set of plug pins, an orientation guide rod allowing sliding of pins and a slide block restricting the shift of pins; the plug pin comprises of at least two pins of different sizes, of which a single pin can be pushed every time; a sliding groove is set laterally onto the slide block; the groove is deep upwards and shallow downwards; the pin is provided with a bulge; when the pin is pushed, the bulge moves along the groove of the slide block groove; given the different depth of the groove, the bulge pushes the slide block to shift, such that the bulges on other pins cannot be aligned with the center of the groove, so other pins not yet pushed are restricted in original position.