| 摘要 |
A mechanical arm includes a first arm (10) having a first end securable to a wall, a second arm (20) having a first end pivotally connected to a second end of the first arm (10) and a second end adapted for holding an object and a buffering device (40) connected to the first arm (10) to provide a buffering effect to decrease downward movement velocity of the first arm (10) so as to provide a safety mechanism. |
