| 摘要 |
he invention relates to a doorway training bar composed of two tubes 3, a shaft-screw 4, two nuts 5 and two end fittings 2 having the elastic ring 1. The two tubes 3 are adapted to and freely rotating around the shaft-screw 4, the two nuts 5 are interposed between the aforementioned tubes and the ornamental cylinder 6 with its projection 9 is positioned between the nuts. The two end fittings 2 of the bar are firmly adapted to the door's jamb and secured thereon through one nut, which is rotatable via a proper key. The advantage of the invention is the reduction of the production time and cost (use of two tubes instead of three) and the steady securing of the bar on the door's jamb while training. |
