Electricity: conductors and insulators – Anti-inductive structures – Conductor transposition
Reexamination Certificate
1999-10-08
2001-09-11
Han, Jessica (Department: 2838)
Electricity: conductors and insulators
Anti-inductive structures
Conductor transposition
C361S816000
Reexamination Certificate
active
06288330
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a cover device, more particularly to a cover device for providing electromagnetic interference shielding to an electronic component.
2. Description of the Related Art
FIG. 1
illustrates a conventional cover device for providing electromagnetic interference shielding to an electronic component. The conventional cover device includes a cover plate
11
formed with a plurality of posts
111
that project from an inner surface thereof, and a conductive plate
12
formed with a plurality of positioning holes
123
. The posts
111
extend into the positioning holes
123
for positioning the conductive plate
12
on the inner surface of the cover plate
11
. The conductive plate
12
has a plurality of spring pieces
121
that are formed thereon by punching and that are spaced apart from each other. Each of the spring pieces
121
is connected integrally to the conductive plate
12
and inclines away from the cover plate
11
.
Since the spring pieces
121
are made of metal, after a long period of time, the spring pieces
121
easily experience elastic fatigue such that the conventional cover device cannot provide good electrical connection between the spring pieces
121
and associated conductors on a housing that receives the electronic component. Furthermore, the spring pieces
121
have sharp edges that can cause injury during assembly.
SUMMARY OF THE INVENTION
Therefore, the object of the present invention is to provide a cover device for providing electromagnetic interference shielding to an electronic component that is both safe and durable.
According to the present invention, a cover device is adapted to provide electromagnetic interference shielding to an electronic component that is received inside a housing of an electrical appliance. The housing is formed with an access opening to permit access to the electronic component inside the housing. The cover device includes an outer dielectric cover plate adapted to be mounted on the housing so as to cover the access opening, and an inner conductive member.
The inner conductive member includes a conductive plate, a plurality of conductive spring pieces and a conductive connecting unit. The conductive plate is mounted on an inner surface of the cover plate. The conductive spring pieces are disposed on at least one edge of the conductive plate, and are spaced apart from each other. Each of the spring pieces has opposite first and second end portions. The first end portions of the spring pieces are connected to the conductive plate. The conductive connecting unit interconnects the second end portions of the spring pieces.
REFERENCES:
patent: 6140577 (2000-10-01), Rapaich et al.
patent: 6169666 (2001-02-01), Venant
Compal Electronics Inc.
Han Jessica
Pillsbury & Winthrop LLP
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