Watertight casing for electronic apparatus

Details Watertight casing for electronic apparatus Watertight casing for electronic apparatus

1992-05-18

1994-08-02

Eley, Timothy V.

Electricity: conductors and insulators

With fluids or vacuum

Boxes and housings

174 521, 361736, H05K 506

Patent

active

053347994

ABSTRACT:
A watertight casing for electronic apparatus includes a first case, a second case and a cover. Sealing members are interposed between the first case and the second case, and between the second case and the cover, respectively. The first and the second cases and the cover are fastened tightly together. A printed board mounts electronic parts on one side thereof, and an air-zinc battery on the other side. The first case is provided with a recess portion into which the electronic parts on the printed board are received. Another sealing member is interposed between the second case and the other side of the printed board. The second case is provided with a through hole which is closed by the cover. The battery is received in the through hole in a sealed manner. The second case is further provided with a vent hole communicating the through hole with an atmosphere. At the opening end of the vent hole there is provided with a gas permeable waterproof sheet for permitting air to pass through but not permitting moisture to pass through.

REFERENCES:
patent: 3784725 (1974-01-01), Perkins et al.
patent: 3863436 (1975-02-01), Schwarzschild et al.
patent: 5081327 (1992-01-01), Graham et al.
patent: 5239446 (1993-08-01), Matsumura et al.

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