Top setting-up mechanism for folding tent

A top setting-up mechanism for folding tent, said folding tent having a collapsible skeleton including from inner to outer side a plurality of radially extended stretchers, upper ribs, and lower ribs, said top setting-up mechanism comprising:

• an upper hub that is a hollow tubular member having a plurality of radially projected lugs spaced on an upper part of an outer wall surface thereof for pivotally connecting to inner ends of said upper ribs, and having long grooves axially provided on an inner wall surface thereof;
• a first cap having a centered round hole being fixedly fastened to a top of said upper hub;
• and a hollow guiding tube having guiding ribs provided at a lower part of an inner wall surface being fixedly fitted in said hollow upper hub;
• a lower hub having a plurality of radially projected lugs spaced on a lower part of an outer wall surface thereof for pivotally connecting to inner ends of said stretchers, and an upper part formed into a hollow retainer;
• said retainer being provided on an outer wall surface with guiding grooves corresponding to said guiding ribs provided on inner lower part of said guiding tube to interfere with said guiding ribs;
• a second cap being fixedly fastened to a bottom of said lower hub, and having a centered axial projection extended toward said lower hub;
• and
• a pull cord that is extended through said axial projection on said second cap with two ends of said pull cord sequentially upward extended through said lower hub, said guiding tube, said upper hub, and said first cap to expose from said setting-up mechanism;
• whereby when said pull cord is upward pulled, said lower hub is moved toward said upper hub with said retainer on said lower hub extending into said guiding tube to engage said guiding grooves on said retainer with said guiding ribs in said guiding tube, preventing said lower hub and said upper hub from turning relative to one another after they are fully coupled together.