The invention relates to a four-bar rotating guardrail structure of a hospital bed, including a handrail, two handrail links, a link assembly, a buckle, a buckle pin shaft and a jacking assembly； the handrail link is movably connected with the handrail rod through the link assembly, the handrail link is hinged on the bed, the middle part of the buckle is hinged on one side of the handrail rod through the buckle pin shaft, and the inner end of the buckle is clamped into the crossbar 1 of the link assembly In the clamping groove on the side, the jacking component is installed on the top of the handrail and the top is against the top surface of the cross bar.Because the handrail connecting rod in this creation is connected with the handrail through the connecting rod assembly, and the connecting rod assembly can be fixed by the buckle, and the up and down movement of the connecting rod assembly can be limited by the top pressure element, and the left and right shaking of the connecting rod assembly can be limited by the anti swing pin, so that the guardrail can be kept completely closed and half sunk, and the structure is simple and the operation is convenient.本創作係有關一種病床四連桿旋轉護欄結構，包括扶手桿、兩根扶手連桿、連桿組件、卡扣、卡扣銷軸、頂壓組件；該扶手連桿通過連桿組件與扶手桿活動連接，扶手連桿鉸接在床上，卡扣中部通過卡扣銷軸鉸接在扶手桿的一側，卡扣的內端卡入連桿組件中橫桿一側的卡槽內，頂壓組件安裝在扶手桿頂部且頂靠在橫桿的頂面。由於本創作的扶手連桿通過連桿組件與扶手桿活動連接，並可通過卡扣將連桿組件固定，並可通過頂壓元件限制連桿組件上下移動，通過防擺動銷限制連桿組件左右晃動，使護欄可以保持完全封閉和半沉式狀態，結構簡單、操作方便。
