Adjustable ramp board structure

An adjustable ramp board structure, comprising:

• a load-bearing board;
• a support assembly comprising two support legs that are rotatably connected to each other, each of the two support legs comprising a connecting end and a supporting end opposite to the connecting end, the connecting ends of the two support legs being rotatably connected to the load-bearing board, and the connecting end of one or each of the two support legs being further slidably connected to the load-bearing board;
• a power output member;
• and
• a transmission assembly connected to the power output member and connected to at least one of the two support legs, the transmission assembly being configured to convert motion provided by the power output member into sliding movement of the connecting end of one or each of the two support legs relative to the load-bearing board, such that the supporting end of one or each of the two support legs moves away from or toward the load-bearing board.