| 摘要 |
A tent frame includes post sets located at four ends. Every two neighboring post sets engage respectively with a first linkage rod set and a second linkage rod set. The first linkage rod set of one post set and the second linkage rod set of a neighboring post set are pivotally engaged with each other through a first driven rod set and a second driven rod set which in turn are pivotally engaged with each other through toggle joints in a cross and staggered manner. There is a center pole located in the center of the tent frame engaging with four passive bar sets. Each of the passive bar sets attaches to the juncture of the first and second driven rod set. The first and second linkage rod sets, the first and second driven rod sets, and the passive bar sets are pivotally engaged with one another through toggle joints, and are movable by the post sets for extending or folding the tent frame.
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