| 主权项 |
1. An adjustable snap-acting hinge comprising:
a first articulated quadrilateral and a second articulated quadrilateral, which can move on a working plane and share a first lever and a second lever and are provided respectively with a plate for coupling to a first element and with a plate for fixing to a second element, elastic means being provided with two opposite ends that can move toward or away from each other and act between a point of the first lever and a contrast element associated with the coupling plate, the hinge being movable alternately between an open configuration and a closed configuration in which the plates have mutually different arrangements, characterized in that the contrast element can be arranged in at least one position for use, which lies between a first position in which the contrast element is arranged at a maximum distance from the point of the first lever and a second position in which the contrast element is arranged at a minimum distance from the point of the first lever in order to vary the preloading of the elastic means, locking means being provided for keeping the contrast element in the position for use. |
