SYSTEM WITH EXTENDABLE RETRACTABLE TELESCOPIC ELEMENTS DEPENDING ON A LIFTING MECHANISM, LOCKABLE AND UNLOCKABLE MECHANICALLY AND AUTOMATICALLY

摘要

A system is described for lifting tables, chairs, bed bases, children's high chairs or other items to be lifted; which is lockable and unlockable automatically through at least one universal telescopic snap movement or in a known way comprising at least one pantograph—a vertically moveable load-bearing structure arranged between a base and the bottom of a piece of furniture or element to be lifted and a stopping device intended to keep the pantograph in a desired height position.;According to the invention the load-bearing structure is formed by at least one pantograph having a plurality of parallelograms articulated to one another whose lower vertex is articulated to the base and upper vertex is articulated to the bottom of the furniture or object to be lifted and the stopping device is an integral part of telescopic snap movement.

主权项

1. A system for lifting tables, chairs, bed bases, children's high chairs or other items to be lifted, which is lockable and unlockable automatically through at least one universal telescopic snap movement or in a known way comprising at least one pantograph of a vertically moveable load-bearing structure arranged between a base and the bottom of a piece of furniture or element to be lifted and a stopping device intended to keep the pantograph in a desired height position, the load-bearing structure is formed by at least one pantograph having a plurality of parallelograms articulated to one another whose lower vertex or lower extensions of the pantograph is/are articulated to the base and upper vertex or upper extensions is/are articulated to the bottom of the furniture or object to be lifted and the stopping device is an integral, part of the lockable and unlockable universal telescopic snap movement connected to one of the ends of a rod carrying at its other end a ratchet engaged in a rectilinear groove of a plate (lockable and unlockable universal telescopic snap movement) articulated at its lower end to the base, the groove being alongside a plurality of pawl teeth arranged inclined so as to house the ratchet locking the pantograph at the desired height; to return to rest position i.e. with the pantograph closed rising until the ratchet finishes its stroke so that it can descend to the required level at a different height or can descend to rest position.