Electricity: conductors and insulators – Conduits – cables or conductors – Bus bars or bus ducts
Reexamination Certificate
1999-05-05
2001-11-20
Cuneo, Kamand (Department: 2841)
Electricity: conductors and insulators
Conduits, cables or conductors
Bus bars or bus ducts
C174S251000, C174S0720TR, C174S0720TR, C439S032000
Reexamination Certificate
active
06320130
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a circuit body having a plurality of circuit members, which is disposed inside an electrical component, such as a connector. Generally, in an electrical circuit of the electrical component, there is uses at least one circuit body having a plurality of plate-shaped bus bars. In order to produce the circuit body, it is carried out to firstly produce a circuit member as a primary molding body. In the circuit member, a plurality of bus bars are juxtaposed and secured with each other through the intermediary of resinous material for the primary molding. Next, on preparation of a plurality of circuit members obtained as above, they are assembled to form a circuit body in which the circuit members are secured with each other through resinous material charged at the secondary molding.
SUMMARY OF THE INVENTION
FIG. 1
shows a circuit member
1
produced in accordance with our proposal (It is not a prior art). Additionally,
FIGS. 2
a
to
2
c
designate a process of producing a circuit body by using the circuit member
1
.
We now describe the structure of the member
1
and the method of producing the circuit body in brief.
As shown in
FIG. 1
, the circuit member
1
includes a plurality of bus bars
2
each of which has been bent by plural times in order to form an inside circuit, and a plurality of holders
3
of resin, each of which is appropriately disposed in the longitudinal direction of the bus bars
2
, for holding them under their juxtaposed arrangement. Each bus bar
2
has one side portion covered with a cover part
4
made of resin. Successively formed integrally with the tip of the cover part
4
through a resinous bending part
6
is a flat plate
5
which covers the bus bars
2
while also exposing them in a row, partially. The exposed portions of the respective bus bars
2
are subjected to conductive plating, thereby providing the member
1
with connecting parts
7
. The so-obtained connecting parts
7
are electrically connected to electrodes on a printed board through bonding wires (not shown in the figure). For this connection, the circuit member
1
is so formed that when combining the member
1
with another circuit member
8
of
FIGS. 2A
to
2
C for producing a circuit body, the connecting parts
7
expose themselves on the surface of the resultant circuit body. Therefore, in
FIG. 1
, the flat part
5
succeeding the cover part
4
through the bending part
6
is established to be somewhat higher than the cover part
4
.
Next, we describe a process of producing the circuit body by overlapping the circuit member
1
and the circuit member
8
with each other, with reference to
FIGS. 2A
to
2
C. Note, the circuit member
8
on the other side, as well as the circuit member
1
, is also provided while the juxtaposed bus bars
9
are held by means of a holder
10
.
First of all, as shown in
FIG. 2A
, the circuit member
8
on the other side is disposed in a not-shown molding die. Thereafter, as shown in
FIG. 2B
, the circuit member
1
on one side is slid along the circuit member
8
while directing the flat part
5
of the member
1
to the circuit member
8
. With this slide movement, as shown in
FIG. 2C
, the circuit member
1
is overlaid on the circuit member
8
and arranged in the molding die. Then, after closing the molding die, the circuit members
1
,
8
are integrated in a secondary molding body by ejecting resinous material into the molding die.
However, since the flat part
5
is higher than the covering part
4
, the bus bars
2
exposing on the flat part
5
come into contact with the holder
10
of the circuit member
8
when overlaying the circuit member
1
on the circuit member
8
. Due to this contact of the bus bars
2
with the holder
10
, the exposed portions of the bus bars
2
are worn, so that the conductive plating may peel off the connecting parts
7
while producing scratches. Consequently, a problem arises in that there is no guarantee of reliable wire-bonding between the electrodes etc. and the connecting parts
7
. Further, it should be noted that the above-mentioned abrasion is disadvantageous to the circuit body in view that not only the connecting parts
7
of the bus bars
2
but other exposed portions having no conductive plating is damaged due to the wearing with the circuit member
8
and stained with the resinous material of the member
8
, thereby causing the circuit body's conductivity in case of contacting the bus bars
2
with external terminals to be deteriorated.
Under such a situation, it is therefore an object of the present invention to provide a circuit body which is capable of preventing the wear of exposed portions of bus bars in case of overlaying one circuit member on another circuit member, whereby it is possible to exclude the abrasion of conductive plating, the occurrence of scratches and which can exclude a possibility of sticking resinous material on the exposed portions of the bus bars.
In the first aspect of the invention, the above-mentioned object of the present invention can be accomplished by a circuit member comprising:
a plurality of bus bars made of conductive material;
at least one holding part for holding the bus bars in their juxtaposed state, the holding part being made of insulating material; and
an adjusting part formed integrally with the bus bars and positioned in the vicinity of respective end portions of the bus bars, the adjusting part being made of insulating material and having an adjusting face on a different level with a horizontal plane including the end portions of the bus bars.
With this configuration, the adjusting part is provided with the adjusting face on a different level with a horizontal plane including the end portions of the bus bars. Therefore, during the slide engagement of the circuit member with a different circuit member, the adjusting part serves to prevent the bus bars of the circuit member from the other circuit member.
Preferably, each of the bus bars of the circuit member is an elongated plate which is bent so as to have a substantial U-shaped configuration.
Preferably, the circuit member of the second aspect further comprises a covering part arranged in the vicinity of the adjusting part, for covering the bus bars partially, the covering part being also made of insulating material.
Preferably, the end portions of the bus bars have conductive plating applied thereon.
Preferably, the adjusting face of the adjusting part is raised from the end portions of the bus bars in a step manner
Preferably, both holding part and adjusting part are made of insulating esinous material.
According to the second aspect of the invention, there is also provided circuit body comprising:
a first circuit member having a plurality of bus bars made of conductive material and at least one holding part for holding the bus bars in their juxtaposed state, the holding part being made of insulating material;
a second circuit member having a plurality of bus bars made of conductive material and at least one holding part made of insulating material for holding the bus bars in their juxtaposed state, the second circuit member being overlaid with the first circuit member by sliding the first and second circuit members relatively to each other; and
molding material for solidifying the so-laminated first and second circuit members;
wherein the first circuit member further includes an adjusting part which is formed integrally with the bus bars and positioned in the vicinity of respective end portions of the bus bars, the adjusting part being made of insulating material and having an adjusting face on a different level with a horizontal plane including the end portions of the bus bars;
whereby, when relatively sliding the first and second circuit members to each other, the adjusting part of the first circuit member comes into contact with the second circuit member while taking priority over any other portions of the first circuit member, so that the bus bars of the first circuit member can be maintained apart from the second
Cuneo Kamand
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Yazaki -Corporation
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