| 摘要 |
<p>1. A supporting base with retractable castors, comprising in its lower face a set of movable castors (6, 7) displaceable in the longitudinal direction, and a lever (13) intended for pulling, blocking and abutting the set of castors, characterized in that it comprises in its lower face on the one hand a set of movable castors (6, 7) mounted on a common axis (14) and a cam lever (13), and on the other hand cells (4, 5) and retaining ribs (10, 11) arranged to form in between them housings and paths of displacements for the castors (6, 7), and guides provided for sliding, positioning and releasing the common axis (14), which guides contribute to the realization of a unit consisting of the set of castors (6, 7), the common axis (4), the cam lever (13) and the base (3), to be assembled by way of insertion, and to be kept in its operational mechanical cohesion due to the mechanical interconnection of its constituting elements.</p> |
