Door guardrail

A door guardrail, comprising:

• a door guardrail body, having an opening;
• the opening is arranged in a middle lower portion of the door guardrail body, the door guardrail body comprises at least one guide rod arranged along a vertical direction above the opening;
• a movable baffle, movably mounted on and moveable vertically along the guide rod;
• and the movable baffle is moveable along a height direction of the door guardrail body to open or close the opening;
• a locking device, arranged on the movable baffle;
• the locking device comprises:
• a mounting base, arranged on the movable baffle, and having a mounting cavity formed therein and at least one sliding groove formed on a side thereof,
• wherein one end of the sliding groove faces towards the guide rod;
• a sliding block, movably mounted in the sliding groove, and having one end extending into the mounting cavity;
• a rotating block, rotatably mounted in the mounting cavity, and having at least one convex block protruding outwardly from a side wall of the rotating block;
• wherein, when the rotating block rotates relative to the mounting base, the convex block is capable of abutting against the sliding block and pushing the sliding block toward the guide rod along the sliding groove;
• wherein the locking device is capable of limiting or allowing movement of the movable baffle relative to the door guardrail body;
• wherein the movable baffle is hollow and the movable baffle includes a first baffle and a second baffle, the locking device is arranged inside the movable baffle, and the first baffle or the second baffle has a notch on a surface thereof at a position corresponding to a position of the locking device;
• and
• the movable baffle further comprises a communication opening defined by the first baffle and the second baffle, and the guide rod is movably inserted into the communication opening.