| 摘要 |
<p>The invention comprises: a stationary part connected to the board (1), forming a rotating body, and provided with retaining and fastening means; and a moving part (4) provided with attachment and retaining means for attaching and retaining same in relation to the retaining and fastening means of the stationary part. The retaining and fastening means of the stationary part are formed by peripherally arranged flanges (31) separated from the board, as well as including portions with no flanges. The moving part (4) comprises a boot securing means including a cavity (46), which can also rotate, provided with internal ridges (43), said cavity (46) having a diameter approximately equal to that of the rotating body of the stationary part together with the flanges (31), such that the connection between the stationary part and the moving part (4) takes the form of a bayonet coupling obtained by means of insertion and rotation.</p> |
