| 主权项 |
1. A hub assembly for collapsible structures, comprising:
a first hub portion having a substantially U-shaped configuration that is defined by a first base wall and a first pair of opposed side walls that extend outward from the first base wall, the first hub portion having a first end and a second end, wherein at least a first opening is defined by the first hub portion and is formed continuously through the first base wall and the first pair of opposed side walls of the first hub portion; a second hub portion having a substantially U-shaped configuration that is defined by a second base wall and a second pair of opposed side walls that extend outward from the second base wall, the second hub portion having a first end and a second end, wherein at least a first pair of aligned openings is defined by the second hub portion and the openings of the first pair of aligned openings are formed through the second pair of opposed side walls of the second hub portion, wherein the first hub portion and the second hub portion are connected in a crossing-configuration, such that at least part of the first hub portion is received within the first pair of aligned openings of the second hub portion and at least part of the second hub portion is received within the first opening of the first hub portion:
a first pivot joint located at the first end of the first hub portion;a second pivot joint located at the second end of the first hub portion;a third pivot joint located at the first end of the second hub portion;a fourth pivot joint located at the second end of the second hub portion;wherein the first pivot joint, the second pivot joint, the third pivot joint and the fourth pivot joint each include a pin and a respective pivoting element that is supported by the pin. |
