| 摘要 |
A hinge assembly has a first arm 10 provided with an upstanding shaft 13 having a lower squared portion 13' and an upper threaded portion 13''. The shaft extends through a hole 15 in a second arm 11, receives a shouldered sleeve 16 having a squared opening which fits over the squared portion 13', and is topped by a nut 17. The height of the central bushing portion of the sleeve is greater than the thickness of the second arm extension defining the hole 15 to implement free rotation without any torque moments tending to unscrew the nut. The sleeve may be deformable and expanded into the hole by tightening the nut to adjust the hinge friction. Abutment shoulders 20, 22 may be provided to retain the arms in a given position when frictionally engaged. |
