Abstract: A labor-saving tent frame includes an upper hub, a lower hub and a drawstring structure, wherein the upper hub is articulated with inner ends of a plurality of long ribs, the lower hub is articulated with inner ends of a plurality of short ribs, and outer ends of the short ribs are articulated with middle portions of the long ribs in one-to-one correspondence; the tent frame further includes a long-short-rib articulated torsion spring provided with a first force arm of the torsion spring and a second force arm of the torsion spring, and the long rib and the short rib are fixed to the first force arm and the second force arm of the torsion spring respectively; the drawstring structure includes a drawstring with which the upper hub and the lower hub may be pulled closer, and two pulling ends of the drawstring hang down below the lower hub.

Abstract: A labor-saving tent frame includes an upper hub, a lower hub and a drawstring structure, wherein the upper hub is articulated with inner ends of a plurality of long ribs, the lower hub is articulated with inner ends of a plurality of short ribs, and outer ends of the short ribs are articulated with middle portions of the long ribs in one-to-one correspondence; the tent frame further includes a long-short-rib articulated torsion spring provided with a first force arm of the torsion spring and a second force arm of the torsion spring, and the long rib and the short rib are fixed to the first force arm and the second force arm of the torsion spring respectively; the drawstring structure includes a drawstring with which the upper hub and the lower hub may be pulled closer, and two pulling ends of the drawstring hang down below the lower hub.