Flexible limiting structure of height-adjustable sliding plate

The invention discloses a flexible limiting structure of a height adjusting sliding plate. The flexible limiting structure comprises a B-column upper guard plate body, the height adjusting sliding plate and a flexible limiting arm. Sliding grooves are formed in the two inner side walls of the B column upper protection plate body, and the two side edges of the height adjusting sliding plate are clamped in the sliding grooves in a sliding mode. A limiting groove is formed in the bottom of the B column upper protection plate body, one end of the flexible limiting arm is connected with the bottom of the height adjusting sliding plate, and a round head structure is arranged at the other end of the flexible limiting arm and clamped in the limiting groove so as to play a role in limiting the sliding distance between the B column upper protection plate body and the height adjusting sliding plate. The structure of the height adjusting sliding plate is optimized, the flexible limiting arm is additionally arranged on th