A bedside guardrail lifting device includes a four-link mechanism, a switch handle, a positioning guide block, a positioning pin, an elastic element, and a linking cable. The switch handle and the positioning guide block are arranged on the four-link mechanism, one end of the linking cable is connected to the switch handle, the other end of the linking cable is connected to the positioning pin, and the elastic element is against the positioning pin, so that the positioning pin can be embedded in the positioning guide block. It is used to fix the four-bar linkage and keep it in a rising state. When the switch handle is pulled upwards, the positioning pin can be used to pull the positioning pin to compress the elastic element, and the positioning pin can be separated from the positioning guide block, so that the four-link mechanism can be lowered and folded. In this way, the force direction and the unlocking direction of the guardrail can be different, so as to lift the guardrail safely and reliably.一種床側護欄升降裝置，包括四連桿機構、開關把手、定位導塊、定位銷、彈性元件及連動索。開關把手及定位導塊設置於四連桿機構上，連動索的一端連接於開關把手，連動索的另一端連接於定位銷，彈性元件抵觸於定位銷，使定位銷得以嵌入定位導塊中，用以固定四連桿機構保持在上升狀態。當開關把手向上扳動時，可通過連動索拉動定位銷壓縮彈性元件，使定位銷脫離定位導塊，使四連桿機構可以下降收折。由此，可使護欄的受力方向和解鎖方向不同，用以安全可靠的升降護欄。
