Abstract: An office desk also serving as an exercise machine for the user includes a table board, a support assembly, a weight plate assembly, and a transmission assembly. The movable table board is attached on the support pillar. The weight plate assembly is suspended below the table board. The transmission assembly includes a drive rod assembly, a transmission roller, and a transmission wire. The transmission roller is connected to a side of the support pillar. The transmission wire is connected to the table board, the transmission roller, and the drive rod assembly. The drive rod assembly can be pushed/pressed by the user, the transmission roller driving the table board and the weight plate assembly to move. User can step on the drive rod assembly at any time to lift the weights and achieve fitness.

Abstract: An air pumping device providing automatic sterilization and pumping of indrawn air for oxygenation or other purpose comprises a shell with an air inlet hole and an air outlet hole, an electromagnetic assembly, a transmission device, an air pumping module, and a sterilizer element. The transmission device includes a swinging element forth for acting forces in two directions alternatively on the air pumping module, to draw in and pump out sterilized air. The air pumping device has two air pumping modules is also disclosed, the two air pumping modules being arranged symmetrically on either side of the swing element, therefore the swing element creates an indrawing of air and an exhausting of air for every swing.