Control panel with EMI screen
US5295046A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1992 |
| Grant date | Mar 15, 1994 |
| Priority date | — |
| Expiry date | Jun 11, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2239/004
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control panel for a television digital special effects device comprises a plastic shroud that has an internal conductive coating and defines a key panel cavity. A key panel plate fits within the key panel cavity. A thin stainless steel EMI screen is adhesively bonded to the upper surface of the key panel plate and an overlay sheet is adhesively bonded to the upper surface of the EMI screen. Apertures for the keys, controls and displays of the control panel are present in registration in the key panel plate, the EMI screen and the plastic overlay. The EMI screen has a main body with fingers projecting from its periphery. The dimensions of the main body of the EMI screen are smaller than the corresponding dimensions of the key panel cavity in the plastic shroud, while the finger-tip-to-finger-tip dimensions of the screen are larger than those corresponding dimensions. Thus, as the plastic shroud is pressed down over the key panel sub-assembly during assembly, the fingers are bent into firm contact with the conductive coating on the interior of the plastic shroud, thereby providing good electrical contact between the EMI screen and the conductive coating of the plastic shroud, which…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.