Receptacles – Sectional – Electrical housing
Reexamination Certificate
2001-05-04
2003-05-06
Castellano, Stephen (Department: 3727)
Receptacles
Sectional
Electrical housing
Reexamination Certificate
active
06557715
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a fitting structure suitable for use on CATV transmitters and other high-frequency apparatuses.
2. Description of Related Art
A prior fitting structure for use on CATV transmitters and other high-frequency apparatuses will be explained by referring to
FIGS. 3 and 4
. A box-type housing made of metal plate
21
includes a rectangular side wall
21
c
with openings
21
a
and
21
b
on one side and the opposite side facing thereto, a plurality of T-shape protuberances
21
f
and
21
g
for fastening by twisting and bulging up and downward from the edges
21
d
and
21
e
of opening of this side wall
21
c
, fastening section
21
h
formed by bending at the right angle the metal plate integral with the side wall
21
c
in the side wall
21
c
facing each other, and holes
21
j
drilled through the fastening section
21
h.
And this housing
21
houses a circuit substrate not shown here and on which various electric components are mounted to create a desired circuit.
The first and second covers
22
and
23
made of a metal plate include respectively rectangular flat plate sections
22
a
and
23
a
, side plates
22
b
and
23
b
formed by bending the four edges of the flat plate sections
22
a
and
23
a
, and a plurality of holes
22
c
and
23
c
drilled through the flat plate sections
22
a
and
23
a
at positions close to the side plates
22
b
and
23
b.
And the first cover
22
is fitted by covering the opening
21
a
with the flat plate section
22
a
, by having the side plate
22
b
fit on the side wall
21
c
from outside and by letting the protuberances
21
f
protrude from the holes
22
c
so that the first cover
22
would cover the housing
21
.
Then, the T-shape protuberances
21
f
protruding from the holes
22
c
are twisted to press the flat plate section
22
a
to the opening edge
21
d
by the action of the protuberances
21
f
and to fasten the first cover
22
to the housing
21
.
The above construction assures the grounding between the housing
21
and the first cover
22
.
And the second cover
23
is mounted by covering the opening
21
b
with the flat plate section
23
a
, fitting the side plate
23
b
on the side wall
21
c
from outside and by letting the protuberances
21
g
protrude from the holes
23
c
so that the second cover
23
would cover the housing
21
.
Then, the T-shape protuberances
21
g
protruding from the holes
23
c
are twisted to press the flat plate section
23
a
to the opening edge
21
e
by the action of the protuberances
21
g
and to fasten the second cover
23
to the housing
21
.
The above construction assures the grounding between the housing
21
and the second cover
23
.
And this is the way electronic apparatuses are built.
For transmitters and other similar sets, a chassis
24
for mounting electronic apparatuses is used, and on this chassis
24
a plurality of mounting supports
25
provided each with a tapped hole
25
a
are fixed.
And electronic apparatuses is mounted by driving screws
26
into tapped holes
25
a
through holes
21
j
while the fastening section
21
h
integral with the housing
21
are placed on the mounting supports
25
and by fastening the fastening section
21
h
with screws
26
.
The prior fitting structure for electronic apparatuses, which fastens the fastening section
21
h
with screws to the mounting supports
25
while the first and second covers
22
and
23
remain fastened to the housing
21
, requires twisting operations for fastening the first and second covers
22
and
23
, and the ensuing complicated nature of the operations was an issue that lowered productivity and lead to high costs.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a highly productive and yet low-cost fitting structure for electronic apparatuses.
The first solution for solving said issue is a fitting structure that includes a box-type housing provided with at least an opening on one side, fastening section integral with this housing, the first cover covering said opening and a chassis to which said housing is fastened with screws, said first cover including a flat plate section covering said opening and fastening pieces extending from and integral with this flat plate section, said fastening section integral with said housing and said fastening pieces of said first cover being fastened at the same time with said screws to said chassis, and said flat plate section being tightly in contact with the opening edge of said housing.
The second solution is a fitting structure in which said chassis includes mounting supports provided respectively with a tapped hole, to which said fastening section integral with said chassis and said fastening pieces are fastened with screws.
The third solution is a fitting structure that provides the second cover including a flat plate section and fastening pieces extending from and integral with said flat plate section, said housing having an opening on the other side facing with said one side, said opening on the other side being covered with said flat plate section of said second cover, said fastening pieces sandwiching said fastening section are fastened with said screws to bring the respective flat plate section of said first and second covers into tight contact with the opening edge of said housing.
The fitting structure for electronic apparatuses according to the present invention, which fastens with screws
6
at the same time the fastening section
1
f
integral with the housing
1
and the fastening pieces
2
c
extending from the first cover
2
to the chassis
4
and brings the flat plate section
2
a
of the first cover
2
into tight contact with the opening edge
1
d
of the housing
1
as a result of screwing the screw
6
, can bring the first cover
2
into tight contact with the housing
1
at the same time as the screwing of the electronic apparatus. Thus, twisting operations required heretofore according to the prior method are no longer necessary, productivity is enhanced and production costs are reduced.
And the provision of mounting supports
5
provided each with a tapped hole
5
a
on the chassis
4
so that the fastening section
1
f
and the fastening pieces
2
c
can be fastened with screws onto these mounting supports
5
enables to adapt easily to the requirements without changing the construction of the prior chassis
4
.
And by providing the second cover
3
consisting of a flat plate section
3
a
and fastening pieces
3
c
extending from this flat plate section
3
a
, by creating an opening
1
b
on the other side facing with one side of the housing
1
, by covering the opening
1
b
on the other side with the flat plate section
3
a
of the second cover
3
, by fastening with screws
6
the fastening pieces
2
c
and
3
c
sandwiching the fastening section
1
f
and by thus bringing the respective flat plate sections
2
a
and
3
a
of the first and second covers
2
and
3
into tight contact with the opening edges
1
d
and
1
e
of the housing
1
, the first and second covers
2
and
3
can be brought into tight contact with the housing
1
at the same time as the screwing of the electronic apparatus, and therefore productivity can be further enhanced and costs can be reduced.
REFERENCES:
patent: 5718605 (1998-02-01), Morikawa et al.
patent: 2000-114734 (2000-04-01), None
patent: 2000-223858 (2000-08-01), None
Alps Electric Co. ,Ltd.
Brinks Hofer Gilson & Lione
Castellano Stephen
LandOfFree
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