| 摘要 |
PURPOSE: An electromagnetic protection device for a drawer is provided to protect a drawer provided with electronic cards from electromagnet interference by placing the electronic cards in the drawer in a specified position in a drawer housing structure. CONSTITUTION: A structure uses conducting sheets with holes to combine electromagnetic screening with air circulation. The electronic circuit boards(6) are mounted parallel and side by side within a drawer(1) which may be introduced into a protective casing(11). The casing comprises lateral walls(12) and upper(13) and lower(14) panels. A rear panel(19) completes the box structure of the casing, and all panels are electrically conducting. These panels are screwed together, and elastic spring elements are provided to ensure the retention of the drawer within the casing. The spring elements themselves are also electrically conducting, ensuring electrical contact between the casing and the structure of the drawer. The casing panels have a number of apertures in them, allowing for both the circulation of air, and the passage of connecting cables.
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