Patent ID: 8176708

Claim:
A top board structure comprising a working surface in office furniture, the top board structure comprising: a base made of sheet metal, and comprising the working surface on an upper surface and a downward portion extending downward from a periphery of the base; a flange extending inwardly from the bottom end of the downward portion, parallel to the base; wherein a standing portion vertically extends upward at an inner end of the flange; a reinforcing frame fixed on a lower surface of the base and comprising a longitudinal reinforcement extending in a right and left direction of the top board structure and a lateral reinforcement extending in a forward and rearward direction of the top board structure, a gap being formed between an inner side of the standing portion and an outer side of the reinforcing frame; and a bottom cover comprising a cover base and an upward portion extending upward from a periphery of the cover base, the bottom cover having an upper opening, the bottom cover being fixed to the reinforcing frame while the upward portion of the bottom cover is disposed in the gap, wherein the gap is slightly wider than a thickness of the upward portion of the bottom cover.