| 摘要 |
A base plate is secured to any existing snowboard with screws or bolts through holes in the base plate mating with the standard holes in the snowboard. A rotatable plate has a wide groove to receive a standard existing boot binding and the two have circular openings which fit rotatably over a protruding circular guide post on the base plate. A cap plate with mating holes and a protruding bottom circular plate extends through the boot binding and rotatable plate openings to contact the guide post on the base plate with the screws or bolts passing through all the mating holes to the snowboard. An elevated rim around the cap plate fits within a circular groove of the boot binding to allow the boot binding and rotatable plate to rotate relative to the cap plate. A low-friction ring has bottom teeth to fit within the teeth of the boot binding and a top low-friction top surface to contact the cap plate. Large diameter bearing rings maybe inserted between the cap plate and the low-friction ring and between the rotatable plate and the base plate to facilitate rotation between the respective elements. A square locking shaft with a large protruding T-shaped handle fits within a slidable sleeve having exterior threads and four binding tabs mating with the sides of the locking shaft. Screwing the sleeve tightly into a lock base with interior screw threads and tapered walls binds the binding tabs against the lock shaft to secure the locking shaft in place. The locking shaft may be locked with the locking shaft inserted in any of the lock holes in a lock ring around the perimeter of the base plate to secure the boot binding at a desired angle to the snowboard. Alternately the locking shaft may be locked with the locking shaft out of the lock holes so that the binding rotates freely without the need to hold the locking mechanism. The lock ring is elevated above the snowboard to allow the lock holes to drain to prevent icing of the lock holes. A protruding pin from the rotatable plate fits within an arc of a circular groove in the base plate to limit the degree of rotation of the snowboard boot for safety. |
