| 主权项 |
1. An umbrella rib assembly (100), comprising:
a plurality of main ribs (110) each hinged at a main rib fixing member (140) provided at a top of an umbrella (1), the plurality of main ribs (110) being arranged along a circumferential direction of the main rib fixing member (140), each main rib (110) including:
an inner side member (111) having an inner end hinged by means of a pin at the main rib fixing member (140);an intermediate member (112) having an inner end hinged by means of a pin at the inner side member (111) at a position higher than an outer end of the inner side member (111); andan outer side member (113) having an inner end hinged by means of a pin at an outer end of the intermediate member (112); a plurality of first auxiliary ribs (120) each hinged at a first auxiliary rib fixing member (150) fixed to an umbrella shank (5) at a position lower than the main rib fixing member (140), the plurality of first auxiliary ribs (120) being arranged along a circumferential direction of the first auxiliary rib fixing member (150), each first auxiliary rib (120) including:
a support member (122) having an inner end hinged at the first auxiliary rib fixing member (150); anda connection member (121) arranged being substantially parallel with the intermediate member (112) and having an inner end hinged at an outer end of the support member (122), an outer end hinged at a position lower than the inner end of the outer side member (113), and a connection point at which an outer end of the inner side member (111) is hinged by means of a common pin positioned between the inner end of the connection member (121) and the outer end of the connection member (121); and a plurality of second auxiliary ribs (130) having an inner end hinged at a second auxiliary rib fixing member (160) slidable on the umbrella shank (5) between the main rib fixing member (140) and the first auxiliary rib fixing member (150), the plurality of second auxiliary ribs (130) being arranged in a circumferential direction of the second auxiliary rib fixing member (160) and an outer end hinged by means of the common pin at the connection point of the connection member (121) and the outer end of the inner side member (111), wherein a diameter (D1) of a first circle formed on the main rib fixing member (140) by the inner end of each inner side member (111) is larger than a diameter (D2) of a second circle formed on the second auxiliary rib fixing member (160) by the inner end of each second auxiliary rib (130), wherein the umbrella rib assembly (100) is unfolded when the second auxiliary rib fixing member (160) descends toward the fixed first auxiliary rib fixing member (150) while the umbrella rib assembly (100) is folded when the second auxiliary rib fixing member (160) ascends toward the fixed main rib fixing member (140). |
