| 摘要 |
<p>A pulling string structure for automatically unfolding and folding an umbrella includes at least two pulling strings. One pulling string is a lower nest string (1) provided between a middle rod (3) and the lower nest (7), and another pulling string is an umbrella unfolding string (2) provided between the middle rod (3) and a bullet-shaped element (35) or other stretching elements within the umbrella head (9). When unfolding the umbrella, joint pipes of the middle rod (3) is pulled out by the umbrella unfolding string (2), and when folding the umbrella, the joint pipes of the middle rod (3) is drawn in by the lower nest string (1).</p> |
