Guiding sleeve for the headrests in seats of vehicles

A guiding sleeve for the headrests in seats of vehicles which slidably receives a rod of the headrest comprising at least one snap-in stop, the sleeve bore at the upper end including an extension for receiving a spring element which with a first portion cooperates with said headrest rod and with a second portion is supported by the wall of the extension. An unlocking element with two parallel spaced legs are arranged in the extension, which legs, being located at the side of the sleeve bore, with their ends cooperate with the first portion of the spring element and are movable from a gripping position engaging the spring element towards their longitudinal extension which causes the first spring portion to drop out of engagement with the rod. The spring spring comprises a pair of spring legs connected to a cross arm which spring legs engage the rod at the side, the cross arm being supported by the wall of the extension, and the unlocking element between the legs comprising a cam surface cooperating with the ends of the spring legs so that the spring legs are bent away from the rod when moving the grip into the extension. MANGUITO-GUIA PARA REPOSA-CABEZAS EN ASIENTOS DE VEHICULOS, QUE ALOJA UNA BARRA DESLIZANTE DEL REPOSA-CABEZAS CON AL MENOS UN TOPE DE ENCLAVAMIENTO, PRESENTANDO EL TALADRO DEL MANGUITO EN EL EXTREMO SUPERIOR UN ENSANCHAMIENTO CON UN MUELLE QUE ACTUA EN COMBINACION CON LA BARRA Y SE APOYA EN LA PARED DEL ENSANCHAMIENTO, ESTANDO DISPUESTO UN ELEMENTO DE DESENCLAVAMIENTO CON DOS BRAZOS PARALELOS QUE ACTUAN CON SUS EXTREMOS EN COMBINACION CON EL PRIMER TRAMO DEL ELEMENTO DE MUELLE Y MOVIBLES HACIA EL ELEMENTO DE MUELLE. ASI EL PRIMER TRAMO DEL MUELLE SE DESENCLAVA DE LA BARRA, PRESENTANDO EL MUELLE AL MENOS UN BRAZO DE MUELLE UNIDO CON EL ALMA TRANSVERSAL QUE SE APOYA EN LA PARED DEL ENSANCHAMIENTO Y PRESENTANDO EL ELEMENTO DE DESENCLAVAMIENTO UNA SUPERFICIE SALIENTE EN COMBINACION CON EL EXTREMO DEL BRAZO DE MUELLE DE FORMA QUE EL BRAZO DEL MUELLE SE DOBLA ALEJANDOSE DE LA BARRA.