EMI shield plug

Details EMI shield plug EMI shield plug

2000-06-16

2001-06-05

Nguyen, Kheim (Department: 2839)

Manufacturing container or tube from paper; or other manufacturi

Container making

Rigid container

C439S092000

Reexamination Certificate

active

06241647

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention generally relates to an EMI (Electromagnetic Interference) shield plug, and particularly to an EMI shield plug for efficiently engaging a PCB (Printed Circuit Board) and an enclosure for grounding purpose.
2. Description of the Prior Art
To ensure proper functioning in an environment having a high concentration of electromagnetic signals, a computer or a peripheral device usually has grounding and shielding means for eliminating the adverse effects of EMI. An electrical component mounted on a PCB is electrically connected to a grounding path of the PCB. The grounding path on the PCB is connected to a metal enclosure to form a full circuit path for eliminating electrical charges. Pertinent examples are disclosed in U.S. Pat. Nos. 5,608,611 and 5,620,290.
Referring to
FIG. 1
, conventional grounding means includes a hole
60
defined in a PCB
6
, a screw
8
, a conductive gasket
9
, and an aperture
71
defined in a metal enclosure
7
. A conductive pad
61
is disposed proximate the hole
60
of the PCB
6
for electrically engaging with the gasket
9
. The gasket
9
defines a petaloid opening
91
. In assembly, the screw
8
extends through the aperture
71
, the opening
91
and the hole
60
to secure the enclosure
7
, the gasket
9
and the PCB
6
together. Thus, the pad
61
is electrically connected to the enclosure
7
for grounding purposes. However, screw threads of the screw
8
are manufactured using a turner. Such a manufacturing process is time and cost inefficient.
SUMMARY OF THE INVENTION
Accordingly, a first object of the present invention is to provide an EMI shield plug having a time and cost efficient manufacturing process.
A second object of the present invention is to provide an EMI shield plug which is easily assembled.
To fulfill the above-mentioned objects, an EMI shield plug in accordance with the present invention comprises an insulative body and a metal plate. The body includes a base and a post projecting from a bottom surface of the base. The base defines a groove exposed to a top surface thereof. A pair of retention sections is formed on opposite sides of the base. Each retention section defines an elongate tunnel therethrough. The post includes a narrow neck and a wide locking section formed at a distal end of the neck. An elongate channel is defined along a longitudinal axis of the post thereby providing the post with resiliency. The metal plate is unitarily stamped to form an arcuate contact section and a pair of arms at opposite ends of the contact section. In assembly, the arms are inserted into the tunnels of the body, and each distal end thereof is inwardly bent to form an engaging section attached to a bottom surface of the base. The post is inserted into a corresponding hole in a PCB with the neck received in the hole and the locking section fixedly locking the PCB. The engaging sections of the metal plate engage with a pad proximate the hole on the PCB. The contact section of the metal plate is adapted to engage with a conductive enclosure for grounding purpose.


REFERENCES:
patent: 3109689 (1963-11-01), Cooney
patent: 4938703 (1990-07-01), Nakano
patent: 5138529 (1992-08-01), Colton et al.
patent: 5218760 (1993-06-01), Colton et al.
patent: 5313016 (1994-05-01), Brusati et al.
patent: 5435750 (1995-07-01), Kosmala
patent: 5934916 (1999-08-01), Latal et al.
patent: 5984697 (1999-11-01), Moran et al.

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