Support assembly with adjustable locking degree, and photography support frame

A support assembly with an adjustable locking degree, configured to support an equipment, the 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 bushing, connected to one end of the outer tube, a peripheral wall of the first bushing defining an avoiding space;
• a second bushing, connected to one end of the first inner tube, the second bushing being provided with a first connecting portion which is capable of passing through the avoiding space;
• and
• a locking sleeve, an inner wall of the locking sleeve being provided with a second connecting portion for cooperating with the first connecting portion, one end of the locking sleeve being arranged with a first abutting portion which is linked to the locking sleeve, an inner wall of the first abutting portion abutting against the second inner tube, an outer wall of the first abutting portion embedding into a gap formed between the first bushing and the second inner tube, and the outer wall of the first abutting portion being configured to be tapered.