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EP0482460A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Housing structure for accomodating electronic apparatus

Assignee: Fujitsu Ltd
•
Filing: 1991-10-11
•
Granted: —
•
Expires: 2011-10-11
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Abstract

Abstract A box-like housing for an electronics apparatus is provided having superior effects for preventing problems caused by ESD. The wall of the housing is formed by a sandwiched plate consisting of the innermost layer (1) of high electro-conductive material such as a steel plate, the middle layer (2) of electro-insulating material such as plastic, and the outermost layer (3) of low electro-conductive material having much higher resistance compared with the innermost layer (1) such as a carbon-containing paint coating. The innermost layer (1) and the outermost layer (3) are frame-grounded through a common earth line.

Inventors

  • 👤 Toshiaki C/O Fujitsu Limited Suzuki
  • 👤 Eiji C/O Fujitsu Limited Suzuki

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-05 13:12
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0067

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 77 words
A housing structure for accommodating an electronics apparatus, having a box-like shape formed by walls, characterized in that the wall comprises three layers; the innermost layer of high electro-conductive material, the middle layer of electro-insulating material, and the outermost layer of low electro-conductive material having much higher resistance compared to the innermost layer; integrally laminated together in a sandwich manner, and in that the innermost layer and the outermost layer are frame-grounded through a common earth line.
Claim 2
Dependent Claim 18 words
A housing structure as defined by claim 1, characterized in that the innermost layer is formed by metal.
Claim 3
Dependent Claim 21 words
A housing structure as defined by claim 1 or 2, characterized in that the outermost layer is formed by carbon-containing material.
Claim 4
Dependent Claim 23 words
A housing structure as defined by any of claims 1 to 3, characterized in that the innermost layer is formed by metal plating.
Claim 5
Dependent Claim 24 words
A housing structure as defined by any of claims 1 to 4, characterized in that the electro-insulating material of the middle layer is plastic.
Claim 6
Dependent Claim 38 words
A housing structure as defined by any of claims 1 to 5, characterized in that the outermost layer and the middle layer are formed of a carbon-contained plastic sheet bonded onto the innermost layer by an electro-conductive adhesive.
Claim 7
Dependent Claim 49 words
A housing structure as defined by any of claims 1 to 5, characterized in that the outermost layer and the middle layer are formed of a plastic plate coated on the opposite side surfaces by a carbon-containing paint and bonded onto the outer surface of the innermost metal plate.

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