Electrical connectors – Electromagnetic or electrostatic shield – Shielding individually surrounding or interposed between...
Reexamination Certificate
2000-05-02
2001-10-02
Sircus, Brian (Department: 2839)
Electrical connectors
Electromagnetic or electrostatic shield
Shielding individually surrounding or interposed between...
C439S071000
Reexamination Certificate
active
06296520
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a modified structure for preventing electromagnetic interference of a central processing unit and, more particularly, to a modified structure for preventing electromagnetic interference of a central processing unit, which not only can achieve better electromagnetic shielding effect, but also can be assembled and disassembled easily. Moreover, production cost of the proposed structure can be greatly reduced.
BACKGROUND OF THE INVENTION
The central processing unit (CPU) is the center of a computer. It processes data transferring from various kinds of devices, and transfers data to correct devices for executing after some judgments and calculations. Therefore, the CPU can be said to be the brain of a computer.
To prevent the electromagnetic interference (EMI) from affecting the operation of a CPU, there is already a kind of structure commercially available for preventing the EMI of a CPU. As shown in
FIG. 1
, a CPU
10
a
is mounted in a base
11
a.
The base
11
a
is then mounted in a motherboard
12
a
so that the CPU
10
a
can be fixed on the motherboard
12
a.
A shielding element
13
a
made of metal material is installed above the CPU
10
a.
The shielding element
13
a
is a rectangular plate with an opening
14
a
at the center thereof. Each corner of the shielding element
13
a
extends downwards to form a pin
15
a
having a reverse hook, as shown in FIG.
1
A. The shielding element
13
a
covers over the CPU
10
a
with the four pins
15
a
mounted in corresponding connection holes
16
a
preset on the motherboard
12
a
so that the shielding element
13
a
can also be steadily positioned on the motherboard
12
a,
thereby providing electromagnetic shielding effect for the CPU
10
a.
The top of the CPU
10
a
contacts with the bottom of a heat radiator
17
a
through the opening
14
a
of the shielding element
13
a.
A retaining element
18
a
is installed above the heat radiator
17
a.
The two ends of the retaining element
18
a
are fastened at the two sides of the base
11
a
so that the heat radiator
17
a
can be fixed on the CPU
10
a.
The heat generated by the CPU
10
a
can thus be conducted to the heat radiator
17
a
for increasing heat-radiating effect.
However, the shielding element
17
a
in prior art uses the pins
15
a
having reverse hooks to be hooked on the motherboard
12
a.
There is no electrically grounding function. Therefore, better shielding effect of EMI can not be achieved.
Moreover, when the shielding element
13
a
in prior art is to be assembled on the CPU
10
a,
it is necessary to align the four pins
15
a
of the shielding element
13
a
with the four connection holes
16
a
on the mother board
12
a
so as to successfully insert the four pins
15
a
in the four connection holes
16
a.
The operation is laborsome and time-consuming, resulting in inconvenience of the assembly of the shielding element
13
a.
More manpower will be wasted so that production cost can not be effectively reduced. Moreover, because the four pins
15
a
of the shielding element
13
a
have reverse hooks, it is difficult to dismount the shielding element
13
a
when the pins
15
a
are hooked in the connection holes
16
a,
resulting in inconvenience of the disassembly of the shielding element
13
a.
SUMMARY AND OBJECTS OF THE PRESENT INVENTION
The primary object of the present invention is to provide a modified structure for preventing EMI of a CPU. The proposed modified structure comprises a base, a shielding element, two first pins, and two second pins. A CPU can be mounted in the base. Two first pin sockets are installed at one side of the base, and two second pin sockets are installed at the other side of the base. The first pins are pivotally connected to pivot joints at one side of the shielding element. The first pins are plugged in the first pin sockets of the base, and the second pins are plugged in the second pin sockets of the base. The shielding element can be closed or unfolded. When the shielding element is closed, it can cover over the CPU with lapping parts at one side thereof lapping on the second pins. The shielding element of the present invention uses the pivot joints and the lapping parts to contact with the first pins and the second pins. Moreover, the first pins and the second pins can be mounted in the motherboard. Through the contact of the first pins and the second pins with the motherboard to acquire electrically grounding finction, the shielding element can provide good electromagnetic shielding effect. Better shielding effect of EMI for the CPU can thus be achieved.
Another object of the present invention is to provide a modified structure for preventing EMI of a CPU, wherein a shielding element is pivotally connected to a base. When the base is mounted in a motherboard, first pins and second pins are also mounted in connection holes of the motherboard. The assembly of the shielding element is timesaving and laborsaving. Manpower can be greatly saved so that production cost can be effectively reduced. Moreover, because the shielding element is pivotally connected to the base, the assembly and disassembly of the CPU can be facilitated when the shielding element is unfolded. The shielding element can be dismounted when the first pins are drawn out from the first pin sockets. The disassembly of the shielding element is thus a very simple operation.
The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawings, in which:
REFERENCES:
patent: 5357404 (1994-10-01), Bright et al.
patent: 5384692 (1995-01-01), Jaff
patent: 5485351 (1996-01-01), Hopfer et al.
patent: 5602719 (1997-02-01), Kinion
patent: 5647756 (1997-07-01), Twigg et al.
patent: 5648890 (1997-07-01), Leo et al.
patent: 5648893 (1997-07-01), Leo et al.
patent: 6071128 (2000-06-01), Brewington et al.
Duverne J. F.
Sircus Brian
LandOfFree
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