| 摘要 |
A protecting device of the threads on the tube end includes a cylindrical rigid frame (1) provided with a flange on one end and a housing fitted together with the rigid frame (1) and provided with an indented back cover; threads (4) are provided on the side periphery of said housing; said threads (4) match with the threads on the tube end; ribs (5) are provided on the side periphery of the cylindrical rigid frame (1); and said housing is fitted with the cylindrical rigid frame (1) by stepped injecting molding process. It has rational structure, can not easily contract and deform, can resist the change of high and low temperature, and has high precision of the dimension. It improves the ability of anti-impact, can avoid shedding, save energy and can be intensively spread and applied. |
