| 摘要 |
<p>A sliding block with ball-bearing system, comprising: a plate (2), wherein there is provided a seat (3) formed by two parallel straight walls (4, 5) joined by semicircular walls (6, 7); a plate-like body (16), which is arranged in the seat (3) and has an edge comprising two portions (20, 21) which are parallel to the straight walls (4, 5) and two portions which are semicircular and concentric to the semicircular walls (6, 7), and a groove, closed in a loop, is formed along the edge and is open outward; respective wheels (29, 30) are rotatably supported on either side of the groove and have a diameter which is larger than the diameter of the semicircular portions; a plurality of balls (31) are arranged in the groove in tangential contact with the walls (4, 5, 6, 7) and are accommodated in recesses of a flexible element which is closed in a loop around the wheels (29, 30). <IMAGE></p> |
