| 摘要 |
The marker light comprises a casing (12) which can be set into the ground, in which is housed a light source (22) and a cover (14) equipped with at least one opening incorporating an optical unit (18) on the front of the light source. The impermeability of the optical unit with respect to the cover is ensured by a seal (20) the shape of which substantially matches that of the periphery (18c) of a base part of the optical unit and which is compressed by means of a presser element (26) applied against a lower surface of the optical unit. The cover (14) affords a housing provided for the seal defined by contact surfaces comprising a wall (14a) facing the periphery of the optical unit and an upper abutment (14b) for the seal (20) parallel to the central plane of the cover. The periphery of the optical unit (18) is shaped to act on the seal (20) in the manner of a wedge so that the seal is compressed against the contact surfaces (14a, 14b) under the action of the presser element (26), the seal being produced from a material capable of flowing under a compression stress so as to fill in the space (24) between the periphery (18e) of the optical unit and the opposite wall (14a). <IMAGE> |
