| 摘要 |
A pushrod-type tent frame includes a base, a frame linkage and a controlling mechanism. The frame linkage has two support sets arranged in parallel, each having a supporting pole, an upper supporting pole and a lower supporting pole pivotally connected in sequence. The supporting pole has an outer end pivotally connected to a front edge of the base, and the lower supporting pole has an outer end pivotally connected to a rear edge of the base. The controlling mechanism has two rod-pushing mechanisms pivotally connected to the two support sets, respectively. Each of the rod-pushing mechanisms has a driving device for driving a telescopic rod assembly to change its reach and thereby prop up or release the frame linkage, so as to expand the tent frame or allow the tent frame to be retracted. |
| 主权项 |
1. A pushrod-type tent frame, comprising
a base including two front edges and two rear edges disposed at four corners thereof, a frame linkage and a controlling mechanism; the frame linkage including two support sets arranged at two lateral edges of the base and parallel to each other, each said support set having a supporting pole, an upper supporting pole, shorter in length than the supporting pole, and a lower supporting pole, shorter in length than the supporting pole, that are pivotally connected in sequence, the supporting pole having an outer end pivotally connected to the front edge of the base, and the lower supporting pole having an outer end pivotally connected to the rear edge of the base; the controlling mechanism having two rod-pushing mechanisms pivotally connected to the two support sets, respectively, each said rod-pushing mechanism including a fixed sleeve, non-coaxially connected to a driving device, a pushing rod, received in the fixed sleeve for a telescopic movement; the driving device for moving the pushing rod with respect to the fixed sleeve, and one end pivotally connected to one said lateral edge of the base and an opposite end pivotally connected to the upper supporting pole or the lower supporting pole, wherein when the tent frame is unfolded to open up, an acute angle is formed between the supporting pole and the upper supporting pole, simultaneously with an obtuse angle formed below the acute angle, between the upper supporting pole and the lower supporting pole, until the upper supporting pole, the supporting pole and the lower supporting pole stand in a triangle-like shape. |
