Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electronic systems and devices
Reexamination Certificate
2001-06-26
2002-12-10
Riley, Shawn (Department: 2836)
Electricity: electrical systems and devices
Housing or mounting assemblies with diverse electrical...
For electronic systems and devices
C206S719000
Reexamination Certificate
active
06493241
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to an EMI protective spring plate for motherboard and, more particularly, to such an EMI protective spring plate, which has a lower dead point design that prevents permanent deformation.
In order to protect a motherboard against EMI (electromagnetic interference), spring plates may be installed in the border of the motherboard to support a plate shield. FIGS. From
1
through
3
show a spring plate constructed according to the prior art for this purpose. This structure of spring plate
10
a
comprises a flat top contact portion
11
a
, which supports a shielding cover plate
40
a
, a flat bottom soldering portion
15
a
, which is soldered to the motherboard
30
a
with tin soldering paste
20
a
, two side plate portions
14
vertically downwardly extended from two ends of the flat top contact portion
11
a
, an intermediate supporting portion
12
a
obliquely connected between the flat top contact portion
11
a
and the flat bottom soldering portion
15
a
, an upper turn R
1
a
connected between the flat top contact portion
11
a
and the intermediate supporting portion
12
a
, a second turn R
2
a
connected between the intermediate supporting portion
12
a
and the flat bottom soldering portion
15
a
, and two slots
13
a
respectively formed in the first turn R
1
a
and the second turn R
2
a
. This structure of spring plate
10
a
is still not satisfactory in function. Because the spring plate
10
a
has a substantially S-shaped profile, it may hook other objects during its installation in the motherboard
30
a
, thereby causing a deformation. Because a stress is produced during the formation of the first turn R
1
a
and the second turn R
2
a
, the flat top contact portion
11
a
and the first turn R
1
a
are forced downwards at different extents upon loading of the shielding cover plate
40
a
, thereby causing the shielding cover plate
40
a
unable to be stably supported on the flat top contact portion
11
a
. Unstable contact between the plate shield
40
a
and the flat top contact portion
11
a
affects the EMI protective effect of the shielding cover plate
40
a
. Further, the spring plate
10
a
may be deformed permanently when received a high pressure.
SUMMARY OF THE INVENTION
The present invention has been accomplished to provide an EMI protective spring plate, which eliminates the aforesaid drawbacks. It is one object of the present invention to provide an EMI protective spring plate, which does not hook other objects during its installation. It is another object of the present invention to provide an EMI protective spring plate, which keeps the loaded EMI protective shielding cover plate stably in balance. It is still another object of the present invention to provide an EMI protective spring plate, which has a lower dead point design that prohibits the spring plate from being deformed excessively. To achieve these and other objects of the present invention, the EMI protective spring plate comprises a flat top contact portion, a flat bottom soldering portion, an oblique supporting portion diagonally connected between the flat top contact portion and the flat bottom soldering portion, a front sliding portion obliquely downwardly extended from one end of the flat top contact portion toward the flat bottom soldering portion and inserted through a lower slot in the oblique supporting portion, and a rear sliding portion obliquely upwardly extended from one end of the flat bottom soldering portion toward the flat top contact portion and inserted through an upper slot in the oblique supporting portion.
REFERENCES:
patent: 4386819 (1983-06-01), Asick et al.
patent: 5530783 (1996-06-01), Belopolsky et al.
Riley Shawn
Rosenberg , Klein & Lee
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