Active solid-state devices (e.g. – transistors – solid-state diode – Housing or package – With contact or lead
Reexamination Certificate
2002-07-16
2004-08-24
Tran, Minhloan (Department: 2826)
Active solid-state devices (e.g., transistors, solid-state diode
Housing or package
With contact or lead
C257S690000, C257S692000, C257S734000, C439S067000, C439S077000, C439S329000, C439S531000
Reexamination Certificate
active
06781230
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a flat circuit device, which is applied for an electric wiring in a car or in an electronic equipment and a method of manufacturing the flat circuit device, especially to the flat circuit device which can be connected with a connector without another special terminals and the method of manufacturing the flat circuit device.
2. Description of the Related Art
A flat circuit device is used for an electric wiring in a car or electronic equipment, and has an electromagnetic shield type without a shield layer, which is disclosed by J.P.A. H5-120928.
In the flat circuit device, there are a flat device
54
being formed to join a first insulating film
51
having a first flat conductor
50
on one side surface thereof and a second insulating film
53
having a second flat conductor
52
on one side surface thereof with an adhesive as shown in
FIGS. 17
,
18
, and a flat circuit device
59
being formed to fold one sheet of insulating film
55
, having separately a first flat conductor
56
and a second flat conductor
57
at a predetermined distance on one side surface thereof, on a folding axis
58
between the flat conductors
56
,
57
and join the other surface of the film together with a adhesive as shown in
FIGS. 19
,
20
. The first and second flat conductors
50
,
52
,
56
,
57
are formed into a meandering curve like a sine wave and are located symmetrically on practically one axial line when viewing from a direction perpendicular to surfaces of the flat circuit devices
54
,
59
.
Thereby, when a magnetic flux is given in a direction perpendicular to a surface of the flat circuit device
54
or
59
(a direction of thickness), noise generation is suppressed. When a magnetic flux is given in a direction of thickness of the flat circuit device
54
or
59
, induced voltages V
11
and V
12
are generated oppositely in each adjacent area of the first flat conductor
50
or
56
and the second flat conductor
52
or
57
so that the induced voltages V
11
and V
12
in each adjacent area of the respective flat conductors
50
,
52
,
56
,
57
cancel each other, and then a large induced voltage in total as a noise is not generated. On the other hand, when currents flow oppositely in the first flat conductor
50
or
56
and in the second flat conductor
52
or
57
, magnetic flux is generated in opposite directions in each adjacent area so that the magnetic fluxes generated in adjacent areas cancel each other to suppress noise generation.
The flat circuit device mentioned above is formed to provide a flat insulator between the first flat conductor and the second flat conductor so that the flat circuit can not connected with a connector without a connecting terminal to be joined with an end of the flat conductors. Thus, another terminals are required and then when terminals are forgotten to be joined or lost, the flat circuit device cannot be connected with a connector.
To overcome the above drawback of prior art, one object of this invention is to provide a flat circuit device which can be connected to a connector without another terminals and the method of manufacturing the flat circuit device.
SUMMARY OF THE INVENTION
In order to attain the objects, a flat circuit device according to this invention includes a first conductor, a second conductor, and an insulator being provided between the first conductor and the second conductor, wherein the first conductor and the second conductor are located to form an area being surrounded by the first conductor and the second conductor when viewing from a direction perpendicular to a surface of the insulator, wherein the insulator includes a bent portion and a laminated portion of a first insulator and a second insulator forming the bent portion, whereby a side end of the bent portion of the first conductor extends straightly along a curved surface of the bent portion, whereby a side end of the second conductor at the bent portion extends straightly along a curved surface of the bent portion.
Structured as mentioned above, an end portion of the first bent portion and an end portion of the second bent portion are formed straightly along respective outer surfaces of the bent portions so that the bent portions can perform as connecting terminals to be connected to the other connecting terminals. Therefore, the flat circuit device can be connected to a connector without another terminals.
Preferably, the insulator is laminated by folding a flexible flat strip-like insulator and a pressing rib having a contact surface with U-shape in cross section to be contacted to the insulator is provided in the bent portion.
Providing the pressing rib in the bent portion as mentioned above, when the bent portion is contacted to the connecting terminals, the bent portion is not deformed so that the first and second conductors are contacted to the connecting terminals in good condition to ensure electrical connection.
Preferably, the insulator is laminated with a first insulator and a second insulator to fold a flexible flat insulator, which is provided in parallel with two strip-like portions of the first insulator and the second insulator to be connected by two portions of a first joining portion and a second joining portion, curvedly at the joining portions, and the first conductor is provided on the first insulator along lengthwise thereof to form one end portion of the first conductor extending straightly at the first joining portion and the other end portion of the first conductor extending straightly at the second joining portion, and the second conductor is provided on the second insulator along lengthwise thereof to form one end portion of the second conductor extending straightly at the first joining portion and the other end portion of the second conductor extending straightly at the second joining portion.
Structured as mentioned above, respective both end portions of the first conductor extend straightly at the first joining portion and the second joining portion along surfaces of the joining portions and respective both end portions of the second conductor extend straightly at the first joining portion and the second joining portion along surfaces of the joining portions so that the first joining portion and the second joining portion perform respectively connecting terminals to be connectable to other connector terminals. Therefore, the flat circuit device can be connected to a connector without another terminals at the both end portions of the first and the second conductors.
Preferably, the first and second conductors are formed into meandering curves symmetrical on respective base lines which are located on practically the same straight line when viewed from a direction perpendicular to a surface of the insulator, and the first and the second insulators are provided respectively with insulating pieces for surrounding alternately turning portions of the first and the second conductors forming areas surrounded by the first and the second conductors, and are provided respectively with slits for inserting the insulating pieces therethrough to place partial areas of the first and the second conductors respectively on each surface opposite to the laminated surface of the other insulator.
Structuring as mentioned above, an area surrounded by the first and the second conductors is formed between two cross points of the conductors when viewing from a direction of width of the flat circuit device so that, even if magnetic flux in a direction of the width is provided, induced voltages are generated oppositely in each adjacent area of the first conductor and the second conductor and then, the induced voltages in each area of the respective conductors cancel each other and generating a noise is depressed. When currents flow oppositely in the first conductor and in the second conductor and magnetic flux of directions of thickness and width of the flat circuit device is generated in each adjacent area, the magnetic fluxes flow alternately in opposite directions in order of d
Armstrong Kratz Quintos Hanson & Brooks, LLP
Tran Minhloan
Wilson Scott R.
Yazaki -Corporation
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