Electricity: conductors and insulators – Anti-inductive structures – Conductor transposition
Reexamination Certificate
2000-03-29
2002-03-12
Reichard, Dean A. (Department: 2831)
Electricity: conductors and insulators
Anti-inductive structures
Conductor transposition
C174S050510, C361S816000, C361S818000
Reexamination Certificate
active
06355877
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an electronic device such as a transmission/reception unit of a cellular phone, a television tuner or the like.
2. Description of Related Art
In a conventional electronic device illustrated in
FIG. 7
, in a transmission/reception unit of a cellular phone, a cover
11
is used for shielding various electric components mounted on a circuit board.
As shown in
FIG. 7
, the cover
11
is formed with one metal plate, and has an upper wall
12
, a side wall
13
bent downward from the four sides of the upper wall
12
, and plural rectangular holes
14
formed on the border between the upper wall
12
and the side wall
13
.
Upon formation of the cover
11
, first, the plural rectangular holes
14
are formed in four side portions of the flat metal plate so as to facilitate bending.
Next, the four sides of the upper wall
12
are bent at a right angle with respect to one side edge of each hole
14
, to form the side wall
13
. Thus the cover
11
is completed.
Further, if the cover
11
that covers the electric components is used in an electronic device, as the holes
14
are open, the electric shielding is degraded.
In the conventional electronic device, having the holes
14
on the border between the upper wall
12
and the side wall
13
of the cover
11
, as the holes
14
are open, electric shielding is poor.
SUMMARY OF THE INVENTION
The present invention provides, as one means of solving the above problem, an electronic device comprising a case body having a box shape, comprising a metal plate, constituting a frame or a cover, wherein the case body has a side wall bent with respect to a hole provided in a flat plate, and wherein the side wall has an extruded portion to cover the hole.
Further, the present invention provides, as another means of solving the problem, the electronic device having the above construction, wherein the extruded portion, with an edge portion of the hole, extends toward an inner surface side of the flat plate, so as to cover the hole.
Further, the present invention provides, as another means of solving the problem, the electronic device having the above construction, wherein the extruded portion is formed by an extrusion process or drawing process.
Other features and advantages of the present invention will be apparent from the following description taken in conjunction with the accompanying drawings, in which like reference characters designate the same name or similar parts throughout the figures thereof.
REFERENCES:
patent: 4092698 (1978-05-01), Brefka
patent: 5095177 (1992-03-01), Johnson
patent: 5436802 (1995-07-01), Trahan et al.
patent: 5748449 (1998-05-01), Tahmassebpur
patent: 10-135664 (1998-05-01), None
Alps Electric CO LTD
Brinks Hofer Gilson & Lione
Oliva Carmelo
Reichard Dean A.
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