One-step locking stand

A one-step locking stand, comprising:

• a fixing portion and at least one supporting leg connected to the fixing portion, wherein the supporting leg comprises:
• first, second and third sections connected one another along an axial direction, each section being movable axially relative to other sections to extend or shorten the supporting leg;
• an operating assembly arranged at one of the sections;
• a first transmission assembly connected to the operating assembly;
• a first locking assembly fixedly arranged at the second section, slidably connected to the first section, and connected to the first transmission assembly;
• a second transmission assembly, slidable through a lumen of the second section, connected to the first locking assembly, as well as arranged spaced apart from the first transmission assembly;
• and
• a second locking assembly arranged at the third section and connected to the second transmission assembly;
• wherein when the operating assembly is operated, the first locking assembly is driven by the first transmission assembly to move axially, to lock or release the first section relative to the second section, and meanwhile, the second transmission assembly is driven by the first locking assembly to move axially, and the second locking assembly is driven by the second transmission assembly to lock or release the third section relative to the second section, so as to achieve one-step locking or releasing of all the sections of the supporting leg;
• wherein the first transmission assembly comprises:
• a driving rod connected to the operating assembly and extending axially;
• a hollow screw mounted around one end of the driving rod away from the operating assembly and connected to the first locking assembly;
• and
• a fixing nut threadedly connected to an outer periphery of the hollow screw,
• wherein the operating assembly is configured to drive the driving rod to rotate axially, and when the driving rod rotates, the hollow screw moves axially under joint action of the driving rod and the fixing nut, driving the first locking assembly to move axially;
• and
• wherein the first locking assembly comprises a sliding seat respectively mounted around the first and second sections, as well as an adjusting member and a locking block movably arranged within the sliding seat;
• wherein the adjusting member is connected to the second transmission assembly and defines a through hole penetrating axially, a top end of the hollow screw passes through the through hole from bottom to top and is then connected to the fixing nut, the fixing nut is fixedly arranged within the sliding seat, a bottom end of the hollow screw supports a bottom end of the adjusting member, and the locking block is arranged between the adjusting member and the first section;
• wherein when the hollow screw moves axially, the adjusting member moves axially together therewith, thereby driving the locking block to move towards or away from the first section, and the adjusting member drives the second transmission assembly to move axially at the same time.