Electrical connectors – With guiding means for mating of coupling part – For guiding side of movable panel – e.g. – circuit board
Reexamination Certificate
1999-07-06
2001-04-03
Donovan, Lincoln (Department: 2839)
Electrical connectors
With guiding means for mating of coupling part
For guiding side of movable panel, e.g., circuit board
C439S374000, C439S759000
Reexamination Certificate
active
06210203
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention generally relates to a retention mechanism for retaining a central processing unit (CPU) module.
2. The Prior Art
A retention mechanism having a base and two retention arms extending therefrom to form a U-shaped configuration for retaining a CPU module therein is well known in the electronics field. Examples are disclosed in Taiwan Patent Application Nos. 85216150, 86207711, 86207803 and 86209531.
FIG. 5
of the attached drawings shows a conventional retention mechanism comprising a base
7
for being supported on a main computer board (not shown) and two retention arms
6
extending from opposite ends thereof. Each retention arm
6
defines a channel
61
for receiving an edge of a CPU module
5
as shown in FIG.
6
. An opening
63
is defined in a bottom wall of the retention arm
6
for accommodating a resilient finger
62
. The finger
62
has an arcuate body
622
having a first end
621
fixed to the bottom wall of the retention arm
6
and a free end
623
movable through the opening
63
. The finger
62
is deformed upon insertion of the CPU module
5
for resiliently engaging with and thus retaining the CPU module
5
in the retention mechanism.
The deformation of the resilient finger
62
upon insertion of the CPU module
5
causes the free end
623
thereof to protrude outward beyond the bottom wall of the retention arm
6
. Thus, the finger
62
may inadvertently interfere with other components mounted on a main computer board, such as a heat sink of the CPU module, thereby causing undesired damage.
It is thus desired to have a retention mechanism that does not have the problem discussed above.
SUMMARY OF THE INVENTION
Accordingly, an object of the present invention is to provide a retention mechanism for retaining an electronic device on a circuit board which does not mechanically interfere with other components mounted on the circuit board.
Another object of the present invention is to provide a retention mechanism for retaining an electronic device without damaging the electronic device.
To achieve the above objects, a retention mechanism in accordance with the present invention comprises a base having two ends to which two retention arms are mounted thereby forming a U-shaped configuration for accommodating the CPU module therein. Each retention arm has a bottom wall and two side walls thereby defining a channel therebetween for receiving an edge of the CPU module. The bottom wall has a cantilevered beam extending therefrom which is deflected when the CPU module is inserted into the retention mechanism. An opening is defined in the bottom wall for partially receiving the deflected beam and the beam is dimensioned to refrain from protruding beyond the bottom wall when the CPU module is inserted into the retention mechanism.
REFERENCES:
patent: 5806949 (1998-09-01), Johnson
patent: 6017233 (2000-01-01), Fry et al.
Chung Wei Te
Donovan Lincoln
Hon Hai - Precision Ind. Co., Ltd.
Prasad Chandrika
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