Support leg connecting structure for a tripod

A support leg connecting structure for a tripod, the tripod comprising a central tube, three support legs, three braces, and an upper tripod unit, the central tube inserting through the upper tripod unit, one end of each support leg pivotally connected to the upper tripod unit, and two ends of each of the braces respectively pivotally connected to the support leg and the central tube, the support leg connecting structure comprising:

• a flat fixing portion formed in a deformed portion of one side of a tubular outer wall between upper and lower ends of each support leg by pressing and recessing, and provided with a piercing hole, the deformed portion being surrounded by an undeformed portion of the tubular outer wall of the support leg, a portion of the tubular outer wall located on an opposite side of the deformed portion being undeformed as a part of the undeformed portion for supporting the deformed portion;
• two recessed curved surfaces formed in the deformed portion and recessed from the tubular outer wall at two opposite sides of the flat fixing portion respectively between the flat fixing portion and the undeformed portion, the undeformed portion extending longitudinally from the recessed curved surfaces toward both upper and lower ends of the support leg, the two recessed curved surfaces being separated by the flat fixing portion, and each recessed curved surface being located on one side of the flat fixing portion and extending outward from the flat fixing portion to the undeformed portion of the tubular outer wall of the support leg;
• a curling portion formed on one end of each of the braces by curling, and having a through hole, the curling portion surrounding a periphery of the through hole;
• and
• a fastening part;
• wherein the deformed portion, including the flat fixing portion and the two recessed curved surfaces, is an integral part of the tubular outer wall, the flat fixing portion has a ridge integrally transitioned to the undeformed portion of the tubular outer wall in both directions of the upper and lower ends of the support leg, the piercing hole of the flat fixing portion corresponds to the through hole of the curling portion, the fastening part is inserted through the piercing hole and the through hole, and the support leg and the brace are pivotally connected to each other around the fastening part.