Telescopic door railing

A telescopic door railing, comprising:

• a vertical pole A (1) on which side a main frame (2) is provided;
• a vertical pole B (3) on which side an auxiliary frame (4) is provided;
• several sliding connection components (5) that are disposed between the main frame (2) and auxiliary frame (4);
• a main rotating connection component (6) that is disposed at the upper end between vertical pole A (1) and main frame (2);
• an auxiliary rotating connection component (7) that is disposed at the lower end between vertical pole A (1) and main frame (2);
• a main locking connection component (8) that is disposed at the upper end between vertical pole B (3) and auxiliary frame (4), the locking connection component includes a handle (8-1) that is fixedly fitted on one side of the upper end of auxiliary frame (4), the handle (8-1) is movably provided with a slider (8-2) inside, and the slider (8-2) is movably provided with an insertion block (8-3) inside, the upper end of vertical pole B (3) is fixedly fitted with a fixed block A (8-4) into which insertion block (8-3) is movably fitted, and a spring A (8-5) is provided between the insertion block (8-3) and handle (8-1);
• and
• an auxiliary locking connection component (9) that is disposed at the lower end between vertical pole B (3) and auxiliary frame (4).