| 摘要 |
An internally pulling type lift device for a chair armrest includes an outer pipe, a guide track, an inner pipe, a follower, a locking member, a pull handle, a control knob, a restoring spring, and a torsion spring. Thus, the guide track, the follower and the inner pipe are encompassed by the outer pipe so that the manufacturer only needs to spray paint on the outer pipe without having to spray paint on the guide track, the follower and the inner pipe, thereby saving the working time and decreasing the costs of fabrication. In addition, the inner pipe is movable in the outer pipe so that the inner pipe will not rub or scratch the outer surface of the outer pipe, thereby enhancing the aesthetic quality of the outer pipe. |
