Automatic locking device for hyperbaric oxygen cabin door

The utility model relates to the technical field of hyperbaric oxygen cabins, in particular to an automatic locking device for a hyperbaric oxygen cabin door, which comprises an oxygen cabin cavity, two oxygen cabin sealing covers, two sliding door guide rails, two connecting rod mechanisms, a sliding door unit and two buffer blocks. The two sliding door guide rails are symmetrically arranged in the oxygen cabin cavity, the two connecting rod mechanisms are sequentially arranged on the corresponding sliding door guide rails, the sliding door unit is arranged on the two sliding door guide rails and the two connecting rod mechanisms, the two buffer blocks are fixedly connected with the corresponding sliding door guide rails respectively, and the hyperbaric oxygen cabin door is pushed to the buffer blocks by personnel in the cabin. Due to the combined action of inertia and human thrust, the connecting rod mechanism swings to generate inward force, so that local deformation of the sliding door unit is generated,