Anti-fog visors assembly
Anti-fog visors assembly comprising at least an external visor ( 5 ) and at least an internal visor ( 6 ) at least partially kept in abutment on the internal surface of said external visor by way of mechanical retaining means. Said mechanical retaining means comprise at least two retainers ( 1, 1 ′) coupled to the external visor, wherein the internal visor is lodged, and is retained. Advantageously, at least one of the two retainers is a pin ( 1 ) rotatable with respect to the internal visor, and which comprises a portion ( 4 ) for the engagement with the same internal visor, which has at least a region for the loose engagement and at least a region for the tight engagement ( 15 ), depending on the rotation angle reached by the rotatable pin. Moreover, the aforesaid rotatable pin is jointed to means ( 3 ) for imposing its rotation which extend to the outside of the external visor.
1. An anti-fog visors assembly of the type comprising at least an external visor and at least an internal visor maintained in abutment, at least partially, on the internal surface of said external visor by way of mechanical retaining means said mechanical retaining means comprising at least two retainers coupled to said external visor, within which said internal visor is lodged
characterized in that
at least one of said two retainers is a pin pivotable with respect to said internal visor and comprising a portion for the engagement with said internal visor which has at least a region for the loose engagement and at least a region for the tight engagement, depending on the rotation angle achieved by said at least one pivotable pin, and in that
said pivotable pin is coupled to means for forcing its rotation, said means for forcing its rotation extending externally from said external visor.
2. An anti-fog visors assembly of claim 1 , wherein said mechanical retaining means also comprise at least a seat, laterally provided within said internal visor, for the engagement with said pivotable pin, the anti-fog visors assembly being characterized in that said portion for the engagement of said pivotable pin is eccentrically shaped with respect to the correspondent seat of the internal visor.
3. An anti-fog visors assembly of claim 2 , characterized in that said pivotable pin comprises at least a tab for blocking said internal visor arranged above said portion for the engagement with said internal visor.
4. An anti-fog visors assembly of claim 2 , characterized in that said portion for the eccentric engagement comprises at least a disassembly angular position, substantially coincident with said at least one region for the loose engagement wherein the distance between the rotation axis of said pivotable pin and the coupling point with said correspondent seat of said internal visor is minimum, thus said pivotable pin not imposing any tension, or impose a minimum tension, to said internal visor.
5. An anti-fog visors assembly of claim 1 , characterized in that said pivotable pin comprises at least a blocking tab which may be arranged above a correspondent region for the engagement with said internal visor, said blocking tab engaging said internal visor exclusively for a preset angular range achieved by said pivotable pin.
6. An anti-fog visors assembly of claim 1 , characterized in that it comprises two pins pivotable with respect to said internal visor, each of said two pivotable pins being provided with a portion for the engagement with the internal visor which provides at least a region for the loose engagement and at least a region for the tight engagement depending on the rotation angle achieved by said at least one pivotable pin.
7. An anti-fog visors assembly of claim 1 , characterized in that said mechanical retaining means comprise at least an external cap fixable to said at least one pivotable pin through a hole provided in said external visor.
8. An anti-fog visors assembly of claim 7 , characterized in that said external cap comprises a shaped portion for the manual operation of said at least one pivotable pin in rotation.
9. An anti-tog visors assembly of claim 7 , characterized in that said external cap is fixable through a snap coupling to said pivotable pin.
10. A visors assembly of claim 7 , wherein said external cap and said pivotable pin are jointly rotatable within said hole of said external visor.
11. A visors assembly claim 7 , wherein said external cap is shaped to prevent the axial sliding of said at least one pivotable pin with respect to said external visor.
12. An anti-fog visors assembly of claim 1 , characterized in that the external surface of said internal visor abuts, almost completely, the internal surface of said external visor.
13. An anti-fog visors assembly of claim 1 , wherein the external surface of said internal visor abuts only in correspondence of its peripheral edge.
14. An anti-fog visors assembly of claim 1 , wherein the curvature radius (R 6 ) of the internal visor is higher than curvature radius (R 5 ) of the external visor.