Dual-lock support assembly and photography support frame

A dual-lock support assembly, comprising:

• a telescopic tube assembly, comprising:
• an outer tube;
• a first inner tube, disposed within the outer tube and being capable of sliding relative to the outer tube in an axial direction;
• and
• a second inner tube, disposed within the first inner tube and being capable of sliding relative to the first inner tube in the axial direction;
• a first locking assembly, comprising:
• a first connecting member, connected to one end of the outer tube;
• a locking sleeve, the locking sleeve comprising one end being sleeved with the first connecting member and another end being arranged with a first abutting portion, the first abutting portion being coaxially disposed within the locking sleeve, an inner wall of the first abutting portion being abutted against an outer wall of the second inner tube, and a gap being defined between an outer wall of the first abutting portion and an inner wall of the locking sleeve;
• and
• a second connecting member, connected to one end of the first inner tube, and a side wall of the second connecting member being extended into the gap.