Pivot knuckle joint and tent using the same

A pivot knuckle joint, applicable to be joined with support tubes of a tent, the pivot knuckle joint comprising:

• a male joint, having a junction portion for being joined with a support tube disposed at one end thereof and having a pivot plate disposed at the other end thereof, wherein a shaft hole is opened in the pivot plate;
• and
• a female joint, having a junction portion for being joined with a support tube disposed at one end thereof and having a first shaft disk and a second shaft disk disposed at the other end thereof, wherein a shaft hole is opened on the first and second shaft disks respectively, and an accommodation space is formed at an inner side of the first and second shaft disks, and when the pivot plate of the male joint is inserted into the accommodation space, a shaft rod penetrates through the shaft holes of the male and female joints, so that the male joint is pivotally disposed on the female joint in a rotatable mode;
• wherein a catch slot is formed at and recessed from a periphery of the shaft hole of the pivot plate on a surface of the pivot plate opposite to the first shaft disk, and a sliding slot is provided at a periphery of the shaft hole of the first shaft disk;
• a stopper portion is formed at one end of the shaft rod and protruded from a periphery of the shaft rod, and when the shaft rod penetrates through the shaft holes of the male and female joints, the stopper portion is inserted into the sliding slot and the catch slot, the other end of the shaft rod is joined with a pressing member disposed at an outer side of the second shaft disk, an elastic member is disposed between the pressing member and the second shaft disk, two ends of the elastic member bear against the pressing member and the second shaft disk respectively, and the shaft rod is secured inside the shaft holes to limit relative rotation of the male and female joints when the pressing member is supported by the elastic member, and the stopper portion of the shaft rod is pushed to slide out of the catch slot when the pressing member is pressed, so that the male and female joints rotate relative to each other, thereby folding or unfolding support tubes joined with the male and female joints.