| 摘要 |
A venting structure (20) is provided on a headlamp adjustor (22, 22a, 22b, 22c) for venting the inside of a sealed stationary component (28) which houses a movable headlamp component (24) in a headlamp arrangement (26). The headlamp adjustor (22, 22a, 22b, 22c) is mounted to the sealed stationary component (28) and is used to effect pivotal motion of the headlamp component (24). The headlamp adjustor (22, 22a, 22b, 22c) includes a housing member (34, 34a, 34b, 34c) and an adjusting screw member (32, 32a, 32b, 32c) which is operatively engaged with an axial bore (42) through the housing member (34, 34a, 34b, 34c). A vent passageway (66, 66a, 66b, 66c) is formed through the housing member (34, 34a, 34b) or through the screw member (32c). The venting structure (20) is formed of a vent (68, 68a) which is connected to the headlamp adjustor (22, 22a, 22b, 22c) and is in communication with the vent passageway (66, 66a, 66b, 66c) through the housing member (32, 32a, 32b, 32c). The vent (68, 68a) allows pressure and moisture laden air to pass outwardly from the inside of the sealed stationary component (28) to the atmosphere while only allowing air and a limited amount of moisture to pass from the atmosphere to the inside of the sealed stationary component (28). The vent (68) may take the form of a microporous filter material (70) housed in tube-like body member (72); a rubber flapper valve (100); absorbent material (120) enclosed in a housing (122); a burper valve (152) housed in a housing (154); a check valve (172); a bladder or balloon (206) housed in a protective housing (208); or a condenser (224, 234).
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