A folding device for a bedside guardrail includes a four-bar linkage mechanism, a switch handle, a fixed rod and a fastener. The switch handle and the fixed rod are arranged on the four-link mechanism, and the fastener is connected to the switch handle through the linkage rod. When the four-bar linkage mechanism is lifted, the four-bar linkage mechanism keeps ascending in a pivoting manner until the inclined surface on the outside of the buckle guides the fixed rod to slide into the groove of the buckle to fix it, so that the fixed four-bar linkage mechanism remains In the rising state. When the switch handle is pulled upward, the buckle can be driven away from the fixed rod through the linkage rod, so that the four-link mechanism can be lowered and folded. In this way, the force direction and unlocking direction of the guardrail can be different, ensuring that this mechanism is a safe and reliable lifting guardrail.一種床側護欄收折裝置，包括四連桿機構、開關把手、固定桿及卡扣件。開關把手及固定桿設置於四連桿機構上，卡扣件通過連動桿連接於開關把手。當四連桿機構抬升時，四連桿機構以樞接式連動保持上升狀態，直到卡扣件外側的斜面導引固定桿滑入卡扣件的凹槽內固定，使固定四連桿機構保持在上升狀態。當開關把手向上扳動時，可通過連動桿帶動卡扣件脫離固定桿，使四連桿機構進行下降收折。由此，可使護欄的受力方向和解鎖方向不同，確保此機構為安全可靠的升降護欄。
