Electronic apparatus for vehicle

摘要

An electronic apparatus for a vehicle, includes an electronic device, a waterproof housing that receives the electronic device, and a filter. The housing has a ventilation hole that penetrates through a housing wall of the housing. The filter is attached to a filter attachment portion of the housing wall to cover the ventilation hole. A wall surface of the ventilation hole includes a slope surface section that has an increasing cross-sectional area, which progressively increases from an inner end to an outer end of the slope surface section toward an outer surface of the housing wall in a penetrating direction of the ventilation hole. Furthermore, a distance between the filter attachment portion and the outer surface is larger than that between the inner end of the slope surface section and the outer surface in the penetrating direction.

主权项

1. An electronic apparatus for a vehicle, comprising:
at least one electronic device; a waterproof housing that receives the at least one electronic device in an interior of the waterproof housing, wherein a ventilation hole penetrates through a housing wall of the waterproof housing from an inner surface to an outer surface of the housing wall in a penetrating direction thereof to communicate between an outside and an inside of the waterproof housing; and a filter that is generally planar and is attached to a filter attachment portion of the housing wall to cover the ventilation hole, wherein: a wall surface of the ventilation hole includes a slope surface section that has an increasing cross-sectional area, which progressively increases from an inner end to an outer end of the slope surface section toward the outer surface of the housing wall in the penetrating direction of the ventilation hole; a distance between the filter attachment portion and the outer surface of the housing wall measured in the penetrating direction of the ventilation hole is larger than a distance between the inner end of the slope surface section and the outer surface of the housing wall measured in the penetrating direction of the ventilation hole; and the slope surface section is configured such that a rate of change in the cross-sectional area of the slope surface section per unit distance in the penetrating direction of the ventilation hole is increased toward the inner surface of the housing wall.