Lift chair mechanism is a kind of equipment that can adjust the chair lifting. It is necessary to use the lifting mechanism to adjust the height of the climbing tool, so as to flexibly adapt to the actual use of the situation. However, the height adjustment of the existing lifting mechanism is time-consuming and laborious, which can not flexibly reach the required height, and the stability of the lifting mechanism is poor.

In some embodiments, the ring and threaded pipe are integrated structures. In some embodiments, the ring and threaded pipe are split structures. In some embodiments, the inner thread is located on a threaded inner wall near the threaded pipe end. In some embodiments, the length of the inner thread is 1/10-1/20 of the inner wall length of the threaded pipe. In some embodiments, the threaded tubes are sequentially cased in an axial direction of equal length. Compared with the existing technology, the beneficial effect of this technology is: the adjacent threaded pipe through the corresponding internal and external thread rotation sleeve, can freely adjust the height of the lift chair mechanism, improve the flexibility of the lifting mechanism.

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