| 摘要 |
Disclosed is a door hinge device having a damping function. Owing to cooperation of an adjusting bolt, an upper holder and a shaft, the door hinge device can properly adjust a size of a gap defined between a fixed plate and a rotating plate when the size varies, for example, due to a discrepancy in specifications between a door and a doorframe. By the presence of a ball bearing, the door hinge device can minimize frictional force produced between component elements so that a lifetime of the door hinge device is lengthened and various springs can be used in the door hinge device irrespective of their elastic moduli. |
