Abstract: In one aspect, a battery tray includes a bottom plate, a side beam structure, and at least one first partition. The first partition is located in a mounting cavity and divides the mounting cavity into at least two accommodating cavities for housing a battery module. A partition body of the first partition is connected to the side beam structure, the partition body is provided with a notch, and an insulating assembly of the first partition is configured to seal the notch. At least one of the side beam structure or the first partition that is associated with a respective accommodating cavity of the at least two accommodating cavities is provided with a first exhaust port and an exhaust channel communicating with the first exhaust port.

Abstract: The present invention relates to a rotary pressing cosmetic pen includes a pen tube, a material assembly, a pressing assembly and a discharging assembly; the pressing assembly includes a cylinder, a button cover, an outer ring and an inner ring; the cylinder rotately connects to the lower end of the pen tube; the outer ring is fixed in the cylinder; the button cover is inserted into the outer ring and stucked therein along the circumferential direction of the outer ring; one end of inner ring is inserted between the outer ring and the button cover, the other end of inner ring is inserted into the lower end of the pen tube and stucked therein along the circumferential direction of the pen tube; the inner ring is also provided with spiral grooves; the button cover is provided with clasps inserting into the spiral grooves and sliding therein.