Patent ID: 7942159

Claim:
A foldable tent frame, comprising: a plurality of braces; connection sets connecting said plurality of braces, wherein said connection sets include an upper connection set and a lower connection set; wherein said upper connection set includes a first upper connection piece and a second upper connection piece, hinged together in dull connection; said first upper connection piece includes: a cut-away groove including a pair of opposing groove sides, the cut-away groove being formed along an axial and having an open end thereof; and a through cutting groove formed at the open end of the cut-away groove and extending across the entire width of said pair of opposing groove sides; said second upper connection piece includes: a tongue extending from a front end thereof for plugging into said cut-away groove; a slotted-eye formed in the center of said tongue; a rim formed at a root of the tongue; and a cam extending from a surface of said rim and coordinating with said through cutting groove; wherein said lower connection set includes a first lower connection piece and a second lower connection piece, inter-hinged with each other; said first lower connection piece includes: a lower cut-away groove including a pair of lower opposing groove sides, the lower cut-away groove being formed along a lower axial and having a open end thereof; a lower cutting groove extending across the entire width of said pair of lower opposing groove sides; and a lower stopping cam with a lower stopping surface extended out from the open end of said lower cut-away groove; said second lower connection piece includes: a lower tongue extending from a front end thereof for plugging into said lower cut-away groove; a lower slotted-eye formed in the center of said lower tongue; a lower rim formed at a lower root of the lower tongue; and a lower cam extending from a surface of said lower rim and coordinating with said lower cutting groove, wherein said lower cam engages the lower stopping surface.