Computer main board case

Details Computer main board case Computer main board case

1999-09-28

2001-05-08

Gandhi, Jayprakash N. (Department: 2841)

Electricity: electrical systems and devices

Housing or mounting assemblies with diverse electrical...

For electronic systems and devices

C361S753000, C361S756000, C361S801000, C361S802000, C211S041170, C206S706000

Reexamination Certificate

active

06229710

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to an improved computer main board case, and more particularly to a structure for easily pulling out the computer main board and a structure for easily assembling and disassembling the components of the computer main board case.
It often takes place that a personal computer user replaces central processing unit (CPU ) as necessary so as to promote the function of the computer. Therefore, it is quite necessary to design the computer main board case with a structure enabling the user to easily draw out the main board with the CPU from the computer main board case. In addition, in accordance with the different requirements of the consumers or in response to the varied price of the CPU on market, the computer manufacturers often will not insert and mount the CPU on the main board. This is left to the retailer or wholesale merchant who according to the order of the customer installs the CPU on the main board and then deliver the personal computer product to the customer.
In order to satisfy the above two requirements, it is important to such design the computer main board case is such designed as to be easily assembled and disassembled so as to facilitate installation of the CPU on the main board or replacement of the CPU.
FIGS. 1
to
3
show a conventional measure in which the insertion depth and strength of the main board on the riser card connector socket are quite large. The pivot pins
89
of two sides of a rotary handle
80
are respectively pivotally connected in the pivot holes
90
of a slide bar
88
. When extracting the main board
82
out of the insertion socket of the connector
84
of the riser card
83
, the handle is rotated in the direction of the arrow
91
, making the unplugging member
81
abut against the edge of the computer case so as to extract the main board
82
out of the insertion socket of the connector
84
of the riser card
83
. Under limitation of the extremely small gap between the main board
82
and the computer case, the length of the unplugging member
81
to the handle
85
is very short. This leads to a short operation distance of each rotation of the handle
85
. However, the the insertion socket of the connector
84
of the riser card
83
has a quite deep insertion depth. Therefore, each rotational operation of the handle
85
can hardly effectively totally extract the main board
82
out of the insertion socket of the connector
84
of the riser card
83
.
In addition, the slide channels on the main board case
86
are defined by four lugs
87
rather than continuous slide channels. This has no problem in pulling the main board
82
out of the main board case
86
from the installation position. However, when installing the main board
82
back into the main board case
86
, it is difficult to perform the installation. This is because that when trying to slide the slide bar
88
into the non-continuous slide channels defined by the four lugs
87
, it often takes place that the slide bar
88
can be hardly aligned with the lugs
87
and fail to be slided into the slide channels.
Moreover, the two slide bars
88
are separately independent components and interconnected with each other by four screws
92
respectively passed through the through holes
93
of the main board
82
and tightened in the locking holes
94
of the slide bars
88
. However, the two slide bars
88
still are not integrally connected to form a single part. Therefore, when pulling the handle
85
for pulling out the main board
82
in the direction of the arrow
91
, the slide bars
88
are unsmoothly slided within the slide channels defined by the lugs
87
.
Also, in order to facilitate the assembly and disassembly of the computer main board case, a great number of tenons and mortises are employed. For example, the base frame for mounting the floppy disc drive and CD ROM is connected with the main board case by tenons and mortises. However, the existing base frame and main board case are associated a riding manner. In case of dropping, the base frame is apt to detach from the main board case. For solving this problem, the manufacturers of the main board case will additionally lock the base frame by screws to prevent the base frame from detaching from the main board case. However, this leads to the problem of difficult disassembly and assembly.
SUMMARY OF THE INVENTION
It is therefore a primary object of the present invention to provide an improved computer main board case in which the case cover can be easily disassembled from the main base seat and firmly assembled on the main base seat.
It is a further object of the present invention to provide the above computer main board case in which both the main board base seat and main board can be easily extracted out from the computer main board case.
It is still a further object of the present invention to provide the above computer main board case in which the first guide channels formed on the surface of the main base seat and the second guide channels formed on the main board base seat and slidably fitted with the first guide channels are all integrally formed continuous guide channels, so that the main board base seat and the main board can be smoothly slided in or out.
It is still a further object of the present invention to provide the above computer main board case in which the base frame for mounting the floppy disc drive or CD ROM is formed with latch hooks on one edge and latch forks on another edge for firmly securing the base frame on the first and second upright boards of the main base seat.
According to the above objects, the computer main board case of the present invention includes: a main base seat, a surface of the main base seat being formed with continuous first guide channels and a stopper section, lateral sides of the main base seat being disposed with a first upright board, a second upright board and a third upright board, an upper edge of the first upright board being formed with a first flange having first latch slots, the second upright board being formed with a second flange and continuous second latch slots; a main board base seat, a bottom face of the main board base seat being formed with second guide channels slidably fitted with the first guide channels, whereby the main board base seat is movable relative to the main base seat, a computer main board being secured on the main board base seat, one side of the main board base seat being formed with a fourth upright board having third latch slots; a shifting lever pivotally disposed on the bottom face of the main board base seat, the shifting lever having a cam section, in a non-operation position, the shifting lever being hidden under the bottom face of the main board base seat, while in an operation position, the shifting lever being moved out from the bottom face of the main board base seat with the cam section pressing the stopper section of the main base seat to force the main board base seat to move out of the main base seat; a base frame, one edge of the base frame being disposed with latch hooks latched in the latch slots of the first flange of the first upright board, another edge of the base frame being disposed with latch forks clamping the upper and lower faces of the second flange of the second upright board so as to mount the base frame on the first and second upright boards of the main base seat; and a case cover including a board body and fifth upright boards downward extending from two opposite sides of the board body to form a U-shaped cover body, an inner side of the fifth upright board being disposed with latch hooks for respectively hooking and latching with the second latch slots of the second upright board of the main base seat and the third latch slots of the fourth upright board of the main board base seat.
The present invention can be best understood through the following description and accompanying drawings, wherein:


REFERENCES:
patent: 5724231 (1998-03-01), Winick et al.
patent: 5835343 (1998-11-01), Johns et al.
patent: 6088232 (2000-07-01), Ho
patent: 6

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