| 摘要 |
In a rotary supporting base, a stationary lower base member has a top surface formed with a ring-supporting region that is confined by an outer periphery concentric with and surrounding an inner periphery, and is formed with an engaging unit on the inner and outer peripheries. A coupling ring plate is disposed at the ring-supporting region, is rotatable relative to the lower base member, and has inner and outer peripheral edges which are in sliding engagement with the engaging unit to retain rotatably the coupling ring plate on the top surface of the lower base member. A rotatable upper base member is disposed on top of the lower base member and is coupled to the coupling ring plate for co-rotation therewith relative to the lower base member. A coupling unit is provided on the coupling ring plate and the upper base member and engages an upright prop of the display device.
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