Multifunctional fitness horizontal bar

A multifunctional fitness horizontal bar, comprising:

• an outer tube (1), an inner tube (2) telescopically and axially assembled on first and second ends of the outer tube (1), a support part (3) provided on an outer side of the inner tube (2), and a hanging buckle assembly (4) provided on the outer tube (1) and/or the inner tube (2), wherein a mounting hole (a) is provided on the hanging buckle assembly (4);
• wherein a first adjustment hole (b) is provided on the first and second ends of the outer tube (1), a plurality of second adjustment holes (c) are provided on the inner tube (2), and the multifunctional fitness horizontal bar further comprises a locking device (7) detachably inserted through one of the first adjustment holes (b) and a hole of the plurality of second adjustment holes (c) and configured to lock the inner tube (2) relative to the outer tube (1);
• wherein the locking device (7) comprises a pin (71) detachably inserted through the one of the first adjustment holes (b) and the hole of the plurality of second adjustment holes (c), wherein a large head (711) larger than each first adjustment hole (b) and each of the plurality of second adjustment holes (c) is provided on one end of the pin (71), and the locking device (7) further comprises:
• a flexible locking member (72) of which one end is hinged to the large head (711) and the other end is detachably assembled to the other end of the pin (71);
• wherein the locking device (7) further comprises a sliding sleeve (73) movably sleeved on the outer tube (1), wherein a third adjustment hole (d) corresponding to each first adjustment hole (b) is provided on the sliding sleeve (73).