| 摘要 |
PURPOSE: A safety device for a ladder is provided to ensure simple installation and stable support on the ground. CONSTITUTION: A safety device for a ladder comprises a fixing bracket(100), a support bar(200), a central rotary shaft, a rotation angle fixing shaft(400), a handle, and a restoring spring. The handle is formed at the other end of the central rotary shaft to move the central rotary shaft back and forth while preventing separation. The restoring spring is supported on the handle and a fixing piece(120), surrounding the central rotary shaft. |
