Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electronic systems and devices
Reexamination Certificate
2003-07-15
2004-09-21
Chervinsky, Boris (Department: 2835)
Electricity: electrical systems and devices
Housing or mounting assemblies with diverse electrical...
For electronic systems and devices
C361S710000, C361S719000, C361S720000, C165S080300, C257S718000, C257S719000, C257S727000, C024S453000, C024S458000
Reexamination Certificate
active
06795317
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a fastening device. More particularly, the present invention relates to a fastening device for easily operating and firmly buckling and adopted for mounting a component on a printed circuit board (PCB).
2. Description of Related Art
As computer components develop and electronic devices improve by, for example, increasing of a frequency of a central processing unit (CPU), or enlarging a volume of a heat sink relative to the CPU, a fastening device that is used for firmly mounting the computer components to keep the CPU tight or containing heat dissipation of the heat sink is needed.
Referring to
FIG. 1
, T.W. Patent No 500244 discloses a first prior art fastening device for mounting an attached component
2
a
tightly on a PCB
3
a
. The first prior art includes a buckling member
1
a
, a positioning
20
a
formed on the attached component
2
a
, and a through hole
30
a
formed in the PCB
3
a.
The buckling member
1
a
includes a posting body
10
a
, a cap
11
a
disposed at an end of the posting body
21
and a clip
12
a
disposed at an opposite end of the posting body
10
a
. The cap
11
a
is cylindrical in shape. A diameter of the cap
11
a
is larger than a diameter of the posting body
10
a
and thus the cap
11
a
is retained against the attached component
2
a
while the buckling member
1
a
penetrates through the positioning hole
20
a
of the attached component
2
a
. The clip
12
a
is in an inverted cone in shape. A diameter of a root of the clip
12
a
is larger than the diameter of the posting body
21
and thus the clip
12
a
is retained against the PCB
3
a
while the buckling member
1
a
penetrates through a through hole
30
a
of the PCB
3
a
. The buckling member
1
a
further has a longitudinal crevice formed in each middle of the posting body
10
a
and the clip
12
a
for increasing the resilience of the buckling member
1
a.
However, the first prior art fastening device cannot effectively buckle the CPU or the heat sink thereto, and the clip
12
a
becomes loose and disengages when vibrated or impacted.
As shown in
FIG. 2
, T.W. Patent No 511738 discloses a second prior art fastening device for mounting an attached component
2
b
tightly on a PCB
3
b
. The second prior art includes a buckling member
1
b
, a positioning
20
b
formed on the attached component
2
b
, and a through hole
30
b
formed on the PCB
3
ba.
The buckling member
1
b
includes an elongated body
10
b
penetrating the positioning hole
20
b
of the attached component
2
b
and the through hole
30
b
of the PCB
30
, an operating member
11
b
pivotally connected to a top of the elongated body
10
b
and a spring
14
b
sleeved on the elongated body
10
b
. The elongated body
10
b
has a head
13
b
connected at a bottom thereof and a flange
12
b
horizontally extending outwards from a predetermined position adjacent to the: bottom thereof, respectively, for avoiding the buckling member
1
b
falling off. The fastening device further includes a supporting plate
4
b
below the PCB
3
b
for increasing a supporting strength of the PCB
3
b
. The supporting plate
4
b
has a through hole
40
b
relative to the through hole
30
b
of the PCB
3
b
for further fastening with the head
13
b
of the elongated body
10
b.
But the second prior art fastening device is complex and difficult to assemble because of the elongated body
10
b
first penetrating the positioning hole
20
b
of the attached component
2
b
from a bottom of the attached component
2
b
to a top thereof; the spring
14
b
second sleeved on the positioning hole
20
b
, which protrudes out above and from the top of the attached component
2
b
and the operating member
11
b
further pivotally connecting to a top of the elongated body
10
b.
SUMMARY OF THE INVENTION
A primary object of the present is to provide a fastening device for firmly connecting an attached component to a PCB, and includes an elongated body, an operating member and a resilient member. The elongated body penetrates through the attached component and the PCB. The protruding portion is consequently uplifted to force a clipping portion of the resilient member to support horizontally a bottom of the PCB while the pressing arm is pushed downwardly, such that the attached component is connected to the PCB. The objects of firmly connecting the attached component to the PCB, simplifying assembly steps, cutting down costs, and improving manufacturing efficiency are achieved at the same time.
A fastening device according to the present invention is used to connect firmly an attached component to a PCB. The attached component and the PCB each has hole, and the fastening device includes an elongated body, an operating member, a spring and a resilient member. The elongated body penetrates through the attached component and the PCB, and has a reducing section disposed at a lower half thereof and a protruding portion positioned on a free end thereof. The operating member eccentrically pivots on the elongated body, and has an eccentric body and a pressing arm outwardly extending from the eccentric body. The spring and the resilient member respectively sleeve at an upper half of the elongated body. The resilient member has a clipping portion disposed at an end thereof and tightly contacting the reducing section. The present invention utilizes the protruding portion consequently uplifted to force the clipping portion to support horizontally a bottom of the PCB while the pressing arm is pushed downwardly, such that the objects of firmly connecting the attached component to the PCB, cutting down costs, and improving manufacturing efficiency are achieved. Further, the fastening device consequently penetrates the attached component and the PCB to connect directly to achieve another object of simplifying assembly steps at the same time.
To provide a further understanding of the invention, the following detailed description illustrates embodiments and examples of the invention. Examples of the more important features of the invention thus have been summarized rather broadly in order that the detailed description thereof that follows may be better understood, and in order that the contributions to the art may be appreciated. There are, of course, additional features of the invention that will be described hereinafter and which will form the subject of the claims appended hereto.
REFERENCES:
patent: 5730210 (1998-03-01), Kou
patent: 6055159 (2000-04-01), Sun
patent: 6201697 (2001-03-01), McCullough
patent: 6392889 (2002-05-01), Lee et al.
patent: 6552905 (2003-04-01), Herring et al.
Chervinsky Boris
Rosenberg , Klein & Lee
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