Door guardrail without exposed support rods

A door guardrail, comprising:

• a fabric winding tube (1) and a handlebar (2) arranged on an outer side of the fabric winding tube (1), a mesh fabric (3) being arranged between the fabric winding tube (1) and the handlebar (2), wherein a support rod (4) is arranged in the fabric winding tube (1), a spring device (5) allowing the mesh fabric (3) to retract automatically after being pulled out is disposed around the support rod (4), a lock device (6) used for controlling a length of the mesh fabric (3) pulled out is arranged at an end of the support rod (4), the lock device (6) comprises a tooth portion (61) clamped on the fabric winding tube (1) and a swing rod (62) in snap fit with the tooth portion (61), a press part (63) is arranged above the swing rod (62) and is pushed to drive the swing rod (62) to be separated from the tooth portion (61), a first return spring (64) is arranged between the press part (63) and the swing rod (62), a second return spring (65) is arranged on a side face perpendicular to the swing rod (62), and the swing rod (62) is in snap fit with the tooth portion (61) under the action of the second return spring (65);
• wherein a shell is arranged at one end of the fabric winding tube (1), the lock device (6) is located in the shell, the shell comprises an upper portion (8) and a lower portion connected to the upper portion, and the upper portion (8) is provided with a groove (81) allowing the press part (63) to reciprocate therein;
• a first protrusion (631) used for pushing the swing rod (62) is arranged on a lower end surface of the press part (63), two hook portions (632) protrudes downwards in parallel from the lower end surface of the press part (63) and arranged at two opposite sides of the first protrusion (631), and holes (811) are formed in positions, corresponding to the hook portions (632), of a bottom surface of the groove (81) respectively, the hook portions (632) are configured to pass downwards through the holes (811);
• and
• the swing rod (62) has an end hinged to the lower portion and an end provided with a second protrusion (621) in snap fit with the tooth portion (61);
• and at least two anti-rotation bulges (622) connected to the tooth portion (61) in a meshing manner are arranged below the second protrusion (621) at intervals.