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US 7,936,566 B2Granted
Electronic control unit and waterproof case
AssigneeHitachi, Ltd.
InventorsToshikazu Shigyo, Kazunori Nozawa
Life of this patent
Estimating the term…
Abstract
An electronic control unit has a respiratory filter mounted on a waterproof case. Raised protective walls formed in the case surround the portion of the case at which the respiratory filter is arranged. At least two concave portions are provided for drainage that each extend through different positions of the protective walls.
Claims10
An electronic control unit comprising:
- a waterproof case;
- a printed-circuit board housed in said waterproof case, said circuit board having electronic components mounted thereon;
- and
- a respiratory filter arranged on said waterproof case for allowing air to flow into and out of the waterproof case;
- wherein
- the waterproof case includes a cover comprising cover walls that are of a uniform thickness;
- said cover walls include a raised portion with a depression formed therein;
- said depression is laterally delimited by protective walls that extend upward from a base of said depression, and are formed by a portion of the cover walls in the raised portion;
- said depression has a polygonal shape defined by said protective walls, and surrounds a portion of the case at which the respiratory filter is arranged;
- channels extend through said raised portion in a radial direction from each respective corner of the polygonal shape;
- and
- the respiratory filter is fixable in said depression, in an airtight manner via an O-ring, within a ventilation hole formed so that the hole penetrates through the cover, and an upper extent of each of the protective wall is higher than an upper side of the O-ring.
9 more elements
An electronic control unit comprising:
- a waterproof case comprising a case body and a cover, said cover being defined by exterior walls, which, when mated with said case body, form said water proof case;
- a printed circuit board housed within said waterproof case;
- and
- a respiratory filter arranged on said cover for allowing air to flow into and out of the waterproof case;
- wherein,
- said exterior walls of said cover include a raised portion, and have a uniform wall thickness;
- a depression is formed in said raised portion of said cover;
- said depression is laterally delimited by raised protective walls which are formed by a portion of said exterior walls that define said cover, and extend upward from a base of said depression;
- said respiratory filter is mounted within said depression, in an airtight manner via an O-ring, within a ventilation hole that penetrates through the cover;
- channels formed in said raised portion extend radially outward from said depression through said raised portion;
- and
- an upward extent of each of said protective wall is higher than an upper side of said O-ring.
9 more elements
An electronic control unit comprising:
- a waterproof case that surrounds a printed circuit board;
- a depression formed in a wall of said waterproof case, which wall is of a substantially uniform thickness;
- a respiratory filter mounted in said depression;
- raised protective walls that form a polygonal planar shaped space and surround said respiratory filter, said protective walls being formed by side walls of said depression that extend substantially perpendicularly to said surface of said waterproof case;
- and
- drainage channels extending radially from said space through the protective walls, the drainage channels extending outwardly in different directions from respective corners of said polygonal planar shaped space.
3 more elements
Dependencies are inferred from the claim text.