부산대학교 도서관

A chair seat capable of adjusting a width contains a base, an adjustment assembly, a first sitting portion, a second sitting portion, an adjustable clamp portion, a first guide member, a second guide member, a central shaft, and a screw bolt. The base includes a threaded orifice, multiple locking orifices, a support portion, and a groove. The adjustment assembly includes a first wing and a second wing. The first sitting portion includes a first tilted supporting face. The second sitting portion includes a second tilted supporting face. The adjustable clamp portion includes a guiding orifice. The first guide member includes a first oblique press face and a first connection orifice. The second guide member includes a second oblique press face and a second connection orifice. The central shaft includes an abutting face, multiple fixing orifices, and multiple screws inserting. The screw bolt includes a rotary knob and a non-threaded section.