Electricity: conductors and insulators – Insulators – Special application
Reexamination Certificate
2000-09-05
2002-08-06
Reichard, Dean A. (Department: 2831)
Electricity: conductors and insulators
Insulators
Special application
C174S135000, C174S13800J, C248S049000
Reexamination Certificate
active
06429379
ABSTRACT:
BACKGROUND OF THE INVENTION
(1) Field of the Invention
This invention relates to an insulating support of a junction box, which supplies a power current to various electric loads through the junction box in which input-side terminals of a wire harness connected to the various electric loads are intensively disposed.
(2) Description of the Related Art
So far, an insulating support of a junction box disposed between a power supply and electric loads has intensively disposed input-side terminals of a wire harness, which is connected to the various electric loads. For example, as for a wire harness connected to various electric loads such as lamps of a lamp assembly, door-window regulators for use in vehicle and the like, input-side terminals thereof are intensively disposed on the insulating support of a junction box and a power supply current is fed from the insulating support to the electric loads through the wire harness.
In the following, an example of the insulating support will be explained with reference to
FIGS. 12 and 13
. The insulating supporting structure consisting of an insulating support
1
(an upper insulating case which is a contour of a junction box) and wires
2
to be wired in an after process is disposed in a limited space such as an engine room, a space under or behind an instrument panel in a cabin and a trunk room.
The insulating support
1
made of synthetic resin is molded into one body containing a plurality of small and large bosses
3
into which wires
2
are press-fitted to be held, a plurality of housings
4
having components such as fuses and connectors therein and the like. A pressure-welding terminal
5
is inserted into the insulating support
1
and each wire
2
is press-fitted into a slit
6
thereof to be held therein, thereby an electric connection is attained by a metalic contact. When the wires
2
are wired to make up the insulating support
1
, the insulating support
1
is set on a manufacturing machine by using a positioning hole
7
shown in FIG.
12
A.
The wires
2
are wired into the insulating support
1
according to a predetermined wiring pattern by using a known wiring machine described in Japanese Patent Application Laid-Open No. H4-171688, thereby an insulating support
8
shown in
FIG. 13A
is produced. The wiring can also be carried out by using such a technique that wires fed from an ultrasonic phone nozzle are unitedly welded to the insulating support by melting the insulating support partially or simply by hand.
Upon the wiring, the wire
2
is press-fitted between the bosses
3
. Here, as the need arises, projections are formed in advance on the back of an opposite cap member (with respect to the insulating support) to abut on the wires or an adhesive is employed in order to fix the press-fitted wires.
The above measures are taken to prevent the wires
2
from coming off from the space between the bosses
3
by vibrations transmitted to the insulating support upon traveling of the vehicle. If the wire
2
comes off, a shortcircuiting takes place due to a contact between wires or a noise results in a cabin to damage livability thereof.
According to the recent advance in function and in electronics of vehicles, when need to additionally mount lamp units or electric equipments on the vehicle arises, an external size of the insulating support can not be markedly enlarged any more, since a space for disposing the insulating support is limited.
Here, as shown in
FIG. 13B
, such a design, the so-called cross wiring, can be considered that a first wire
2
″ straddles a second wire
2
′ with making a gap therebetween in the insulating support
1
.
However, if the wire
2
is not a usual coated wire (insulated wire), but an enameled wire or a bare wire, the wire
2
′ and wire
2
″ might contact with each other due to some reason, resulting in that an electric power from a battery might not be stably supplied to electric loads.
SUMMARY OF THE INVENTION
It is therefore an objective of the present invention to solve the above problem and to provide an insulating support of a junction box, which enables the above so-called cross wiring and secures an insulating performance without changing an external form of the insulating support so as to use a space for disposing the insulating support efficiently.
In order to attain the above objective, the present invention is to provide an insulating support for wiring wires thereon of a junction box provided between a power supply and electric loads, comprising a pair of ribs formed on the insulating support for holding a first wire and a second wire therebetween, wherein the first wire laid between tops of a pair of the ribs is held crossing over the second wire disposed between a pair of the ribs.
With the construction described above, the first wire laid between the tops of a pair of the ribs is held in such a manner that the first wire crosses over the second wire which is disposed between a pair of the ribs.
Said each rib has a respective wall faced with each other, a projection is formed on at least one of the walls, and the second wire is press-fitted and held between the projections or between the projection and the opposite wall.
With the construction described above, the projection is formed on at least one of the walls of the rib and the second wire is press-fitted and held between the projections or between the projection and the opposite wall.
A guide channel is formed on said each rib and the first wire to be positioned by the guide channel is laid between the tops of the rib.
With the construction described above, the first wire is positioned on the guide channels formed on a pair of the ribs and laid between the tops of a pair of the ribs.
Said each projection is formed on the respective wall facing with each other.
With the construction described above, since each projection is formed on the respective wall facing with each other, the wiring can be easily implemented.
A spacer is laid between a pair of the ribs so that the spacer prevents the first and second wires from contacting with each other. With the construction described above, since the spacer is laid between a pair of the ribs, the first and second wires never come into contact with each other.
The spacer is formed in such a manner that the first wire laid between the tops of a pair of the ribs can be held to said each rib.
With the construction described above, the spacer prevents the first wire laid between the tops of a pair of the ribs from slipping off, thereby the first wire can be stably held to the ribs.
REFERENCES:
patent: 04-171688 (1992-06-01), None
ARmstrong, Westerman & Hattori, LLP
Walkenhorst W. David
Yazaki -Corporation
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