Brake mechanism, and lifting column using brake mechanism

A lifting column, comprising a mounting box (1), an inner tube component (3), an outer tube component (4), a brake mechanism (2), a circular tube (4), and a lead screw (6), wherein a mounting seat (22) of the brake mechanism (2) is in snap-fit with the mounting box (1);

• and the inner tube component (3) is fixedly connected to the mounting box (1), the circular tube (5) is disposed in the inner tube component (3), one end of the circular tube (5) is connected to the brake mechanism (2), the other end of the circular tube (5) is fixedly connected to a lead screw nut (7), the lead screw nut (7) is fixedly connected to the inner tube component (3), one end of the lead screw (6) is threaded through the lead screw nut (7) and located in the circular tube (5), and the other end of the lead screw (6) is fixedly connected to the outer tube component (4);
• wherein
• the brake mechanism (2) comprises a connecting component (21), a mounting seat (22) and a self-locking spring (23), the connecting component (21) comprises a first spline part (211), an intermediate connection part (212), and a second spline part (213) that are successively disposed, the intermediate connection part (212) comprises a cylindrical section and a limiting structure, and the mounting seat (22) is sleeved over the cylindrical section on one side of the limiting structure, and abuts against the limiting structure, to enable the connecting component (21) to circumferentially rotate relative to the mounting seat (22);
• and the self-locking spring (23) is sleeved over the cylindrical section on the other side of the limiting structure, and one end of the self-locking spring (23) is limited on the mounting seat (22).