| 摘要 |
<p>The device comprises a base plate (1) whereon an external slide (2) is translatably mounted, which is kept pushed by preloaded springs and a second internal slide (8), which is translatable, parallel to said external slide (2), within a rotary body (5) provided with raised and grooved flanks (6-6a) whereon two connecting rods (11-11a) are slidingly mounted; also the ends of the connecting rods are hinged on said internal slide (8). The opposite ends of the connecting rods (11-11a) are then hinged to a table (14) bearing the visor. By means of a release lever (15) mounted on the base plate (1) and pushed by a contrast spring (15b) one causes the forwards translation of the internal slide (8) and a lifting towards the outside of the porthole-aperture of the visor-holding table (14). In this position, the visor is outside the helmet and therefore, being integral with the rotary body (5), it can be rotated upwards until a complete opening has been achieved, without interfering with the cap. Besides, a return lever (4) is also provided suitable to automatically bring again the visor to an embedded closed position, when said visor had been brought by hand to the outside of the porthole-aperture. <IMAGE> <IMAGE></p> |
