Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electronic systems and devices
Reexamination Certificate
1999-10-20
2001-08-14
Picard, Leo P. (Department: 2835)
Electricity: electrical systems and devices
Housing or mounting assemblies with diverse electrical...
For electronic systems and devices
C361S814000, C361S736000, C455S347000
Reexamination Certificate
active
06275390
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to an EMI shield for shielding electronic components on a printed circuit board of a mobile phone, and particularly to an EMI shield having a portion which can be easily detached from the printed circuit so that a repair or replacement of the electronic components can be readily achieved.
A mobile phone is subject to external EMI which can result in signal distortion. Thus, EMI sensitive electronic components on a printed circuit board of a mobile phone are protected by a shield from EMI. Referring to
FIG. 6
, a conventional EMI shield
8
in a mobile phone (not labeled) usually comprises a rectangular lidless box fixed upside down on a circuit board
9
. The shield is unitarily formed and covers a portion of the printed circuit board which mounts EMI sensitive electronic components (not labeled) in the mobile phone. Since the shield is soldered to the printed circuit board, disassembling it from the printed circuit board in order to repair/replace the electronic components requires a desoldering operation, which is very troublesome.
BRIEF SUMMARY OF THE INVENTION
A main object of the present invention is to provide a shield for use in a mobile phone, which has a portion can be easily detached from a printed circuit board, thereby simplifying repairing or replacing the electronic components on the printed circuit board.
Accordingly, an EMI shield in accordance with the present invention being mounted to a printed circuit board in a mobile phone comprises a conductive cover and a pair of grounding strips. The grounding strips are soldered to grounding circuit of the printed circuit board and spaced apart from each other a distance. A plurality of latches are formed on each grounding strip. The conductive cover has an inverted-U shape and includes a shielding plate and a pair of rims. The shielding plate forms a plurality of tabs which cooperate with the rims to define two channels in the cover. Each rim defines a number of openings. The cover is mounted to the printed circuit board by extending the two grounding strips into the two channels to reach a position in which the latches fit into the openings, whereby the grounding strips and the cover shield electronic components on the printed circuit board. The cover can be easily removed from the printed circuit board by releasing the fit between the latches and openings, whereby the electronic components can be repaired/replaced, without the necessity of a desoldering operation.
Other objects, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
REFERENCES:
patent: 5150282 (1992-09-01), Tomura et al.
patent: 5546278 (1996-08-01), Bethurum
patent: 5596487 (1997-01-01), Castaneda et al.
patent: 5764492 (1998-06-01), Ady et al.
patent: 6122178 (2000-09-01), Andrews et al.
Huang Nan-Tsung
Wu Kun-Tsan
Yang Fu-Keng
Chung Wei Te
Duong Hung Van
Hon Hai - Precision Ind. Co., Ltd.
Picard Leo P.
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