| 摘要 |
<p>A pivot joint has a ball (32) mounted in and held in location with respect to a first structure (30) and a second structure (20) which is mounted on the ball and movable thereto. The second structure having a bearing surface (31, 36) which defines its position with respect to the ball. The ball may be held in location by at least two positions of contact with the first structure which may be on opposite sides of the ball so the second structure is captured between the first structure and the ball. The positions of contact may be adjustable.</p> |
