Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electronic systems and devices
Reexamination Certificate
2003-06-05
2004-07-27
Abrams, Neil (Department: 2839)
Electricity: electrical systems and devices
Housing or mounting assemblies with diverse electrical...
For electronic systems and devices
C174S13800J
Reexamination Certificate
active
06768648
ABSTRACT:
CROSS REFERENCE OF RELATED APPLICATION
This application is based on and claims priority with respect to Japanese Patent Application No. 2002-173678 filed on Jun. 14, 2002, the entire content of which is incorporated herein by reference.
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a sheet and an electronic apparatus using this sheet, and to a sheet and an electronic apparatus using this sheet capable of easily attaching and fixing a sheet to a base of an electronic apparatus and also easily separating and recycling the sheet at the time of scrap.
2. Description of the Related Art
Conventionally, in the case of fixing a substrate
52
for electric wiring to a cabinet
51
such as a frame or a body of an electronic apparatus
50
, a pawl-shaped cut raised portion
53
which is a coupling unit provided in the cabinet
51
is used as shown in FIG.
11
. That is, the cut raised portion
53
is provided with a step
54
for placing the substrate
52
and a twist portion
55
for fixing the substrate
52
.
On the other hand, the substrate
52
is provided with a rectangular notch
56
which passes through the twist portion
55
of the cut raised portion
53
and also is placed on the step
54
.
Therefore, the twist portion
55
of the cut raised portion
53
is inserted into the notch
56
of the substrate
52
and the substrate
52
is placed on the step
54
of the cut raised portion
53
and as shown in
FIG. 12
, the twist portion
55
upward protruding from the substrate
52
is twisted about 45° to 90° and the twist portion
55
is protruded from the notch
56
of the substrate
52
and the substrate
52
is fixed on the cut raised portion
53
.
On the other hand, as shown in
FIGS. 11 and 12
, a sheet
57
made of paper, PET, resin, fiber, etc. for electrically isolating both of the cabinet
51
and the substrate
52
or insulating heat or magnetism according to the purpose is attached between the cabinet
51
and the substrate
52
.
This sheet
57
is fixed to the cabinet
51
using the cut raised portion
53
provided for fixing the substrate
52
to the cabinet
51
. For this purpose, for example, a slit
58
cut in I shape (see
FIG. 14
) is provided in a predetermined position of the sheet
57
.
Therefore, in the case of attaching the sheet
57
to the cabinet
51
, as described above, before the substrate
52
is attached to the cabinet
51
, the cut raised portion
53
is passed from the lower portion to the upper portion of the slit
58
as shown in
FIGS. 11 and 12
.
As a result of this, as shown in
FIG. 13
, the cut raised portion
53
is sandwiched by restoring force of both side portions
58
a
of the slit
58
bent and raised by the cut raised portion
53
and the sheet
57
is fixed. Or, as shown in
FIG. 12
, the sheet
57
is fixed by further using adhesive means
59
such as two-sided tape or glue between the sheet
57
and the cabinet
51
.
However, when the slit
58
is provided and the sheet
57
is fixed to the cut raised portion
53
, in case that force acts on the sheet
57
and the sheet
57
is pulled, rupture
60
occurs from the ends
58
b
of the slit
58
as shown in FIG.
14
.
Because of this, in comparison with a state before the rupture
60
occurs as shown in FIG.
15
(A), after the rupture
60
occurs as shown in FIG.
15
(B), there is a problem that restoring force for pushing both the side portions
58
a
of the slit
58
to the cut raised portion
53
becomes weak and the sheet
57
cannot be fixed to the cut raised portion
53
.
Also, when vibration is applied to the cabinet
51
, there is a problem that the sheet
57
flutters in both sides of the slit
58
.
Further, when the sheet
57
is fixed to the cut raised portion
53
by the slit
58
and also the sheet
57
is directly attached to the cabinet
51
using adhesive means
59
such as tape or glue, there is a problem that material of the adhesive means
59
costs and an increase in cost is caused.
Also, there is a problem that it takes time and effort to peel the sheet
57
off the cabinet
51
at the time of scrap and is troublesome and also separability is wrong and it is unsuitable for recycling.
SUMMARY OF THE INVENTION
The invention is implemented in view of the problems described above, and an object of the invention is to provide a sheet which can surely be fixed to a base without using adhesive such as tape or glue and is excellent in separability at the time of scrap, and an electronic apparatus using this sheet.
In order to achieve the object, according to one aspect of the invention, there is provided a sheet which is attached to a coupling unit raised from a base and is placed on the base, the sheet comprising:
a slit portion through which the coupling unit passes is had, a width of the slit portion being formed smaller than a thickness of the coupling unit; and
rupture stops formed at both ends of the slit.
In this specification, paper, PET, resin, fiber, etc. are given as material of the sheet, but it is not limited to these as long as it is the material for performing insulation between a base and an electric wiring substrate.
Incidentally, the insulation means insulation required according to the nature of an electronic apparatus, for example, electrical insulation, heat insulation or magnetic insulation. Further, a sheet with high elasticity is preferably used as the sheet. Also, as a coupling unit, a cut raised portion in which a part of a cabinet is cut and is bent to the side to which the substrate is attached can be considered.
In the sheet constructed thus, a coupling unit for attaching an electric wiring substrate to a cabinet of an electronic apparatus is passed through a slit provided in the sheet. A width of the slit is smaller than a thickness of the coupling unit, so that the sheet is curled up in both sides of the slit by the coupling unit.
Because of this, the sheet tends to return to a flat state and grasps the coupling unit by this restoring force. As a result of this, the sheet is fixed to the coupling unit.
Incidentally, when both sides of the slit are curled up by the coupling unit, force by which the slit is further caused to be ruptured acts, but rupture can be prevented by rupture stops provided in both ends of the slit.
As a result of this, the sheet can surely be fixed to the coupling unit.
According to another aspect of the invention, the rupture stop is an opening formed in a shape without a stress concentration portion or a rupture stop slit inclined to a rupture direction acting on the slit end.
Here, openings with circle or ellipse are given as the opening without a stress concentration portion. In addition, it may be an opening in which the whole shape is rectangular shape and corner portions are rounded.
Also, the rupture stop slit inclined to a rupture direction acting on the slit end means a rupture stop slit inclined to a slit orthogonal direction which is a rupture direction.
Therefore, a rupture stop slit provided straight and slantingly in the slit end, a rupture stop slit provided in Y shape forked from the slit end, etc. correspond.
Incidentally, one end of a slit may be formed in a circular opening and the other end may be formed in a Y-shaped rupture stop slit.
The sheet constructed thus attempts to widen the slit end when the coupling unit passes through the slit, but rupture of the slit is prevented by the opening or the rupture stop slit inclined to the rupture direction, so that the sheet in which both sides of the slit curl up grasps the coupling unit and the sheet can be fixed.
According to another aspect of the invention, a hold sheet which has the same material as that of the sheet and has a through sheet passed through the coupling unit is placed with the hold sheet overlaid on a range including the slit and the vicinity of its slit.
In the sheet constructed thus, a hold sheet in which a slit similar to that of the sheet is provided is overlaid on the sheet to grasp the coupling unit, so that the sheet can be fixed surely.
Also, the hold sheet having the same material as that of the
Abrams Neil
Pioneer Corporation
Sughrue & Mion, PLLC
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