Patent ID: 11953806
Assignee: nan
Field: Mechanical elements (Mechanical engineering)
Classification: CPC G  F | IPC F  G

Claim 0:
1. An adjustable backdrop support system for supporting a backdrop, comprising:
at least two interlocking bars; and
two adjustable tripod stands, during usage, said at least two interlocking bars are interlocked with each other to form a supporting crossbar comprising two ends which are respectively on tops of said two adjustable tripod stands to configure a support system for supporting the backdrop at a predetermined height, wherein the backdrop is adapted for being supported by said supporting crossbar and being extending downward to provide a photographing background environment;
wherein each of said two adjustable tripod stands comprises an adjustable vertical rod assembly and a tripod base which is mounted to said adjustable vertical rod assembly and is able to be collapsed and unfolded;
wherein said adjustable vertical rod assembly comprises a first rod, a second rod, a third rod and a fourth rod, wherein said first rod, said second rod, said third rod and said fourth rod are telescoping rods that are sequentially sleeved with each other;
wherein said first rod comprises a first rod body and a first quick fitting lock, wherein said second rod comprises a second rod body and a second quick fitting lock, wherein said third rod comprises a third rod body and a third quick fitting lock, wherein each of said first rod body, said second rod body and said third rod body are telescoping rod bodies and are locked at predetermined height by said first quick fitting lock, said second quick fitting lock and sad third quick fitting lock;
wherein each of said first quick fitting lock, said second quick fitting lock and said third quick fitting lock comprises an upper part, a fastening member for fastening said upper part to an upper rod body, and a lower part extended from said upper part and is fixed and wound around a lower rod body, wherein said upper part, which has a diameter that is smaller than a diameter of said lower part, is operatively coupled with said fastening member to form an adjustable structure for adjusting the tightness of the locking performance of each of said first quick fitting lock, said second quick fitting lock and said third quick fitting lock;
wherein each of said two adjustable tripod stands has a first support height in a state in which said tripod base is fully unfolded and said second rod body, said third rod body and said fourth rod body are retracted in said first rod body, wherein said first support height is 3.12 ft;
wherein each of said two adjustable tripod stands has a second support height in a state in which said tripod base is fully unfolded and said second rod body is drawn out from said first rod body while said third rod body and said fourth rod body are retracted in said second rod body, wherein said second support height is 4.8 ft;
wherein each of said two adjustable tripod stands has a third support height in a state in which said tripod base is fully unfolded and said second rod body, said third rod body and said fourth rod body are drawn out, wherein said third support height is 6.5 ft or 8.5 ft, wherein said tripod base which is fulled unfolded defines a support surface along a circle at a bottom side thereof, wherein a diameter of the circle is 2.1 ft.